CAMERA DEVICE AND OPTICAL INSTRUMENT

A camera device of the disclosure includes a moving unit, including a first heat dissipation member, a first board disposed on the first heat dissipation member and including a hole to expose a portion of the first heat dissipation member, and an image sensor disposed in the hole, a fixed unit, including a second board disposed so as to be spaced apart from the first heat dissipation member and a second heat dissipation member disposed on the second board, and a support member, configured to support the moving unit to move relative to the fixed unit in a direction perpendicular to an optical-axis direction. The image sensor is coupled to the first heat dissipation member, and the second heat dissipation member is disposed so as to be spaced apart from the first heat dissipation member and to overlap the first heat dissipation member in the optical-axis direction.

TECHNICAL FIELD

Embodiments relate to a camera device and an optical instrument including the same.

BACKGROUND ART

Voice coil motor (VCM) technology, which is used in conventional general camera devices, is difficult to apply to a micro-scale camera device, which is intended to exhibit low power consumption, and study related thereto has been actively conducted.

There is increasing demand for, and production of, electronic products such as smart phones and cellular phones equipped with cameras. Cameras for cellular phones have been increasing in resolution and decreasing in size, and accordingly, actuators therefor are also becoming smaller, larger in diameter, and more multifunctional. In order to realize a high-resolution cellular phone camera, improvement in the performance of the cellular phone camera and additional functions, such as auto-focusing, shutter shaking inhibition, and zooming in and out, are required.

DISCLOSURE

Technical Problem

Embodiments provide a camera device exhibiting improved heat dissipation efficiency and having reduced height in an optical-axis direction and an optical instrument including the same.

Technical Solution

A camera device according to an embodiment includes a moving unit, including a first heat dissipation member, a first board disposed on the first heat dissipation member and including a hole to expose a portion of the first heat dissipation member, and an image sensor disposed in the hole, a fixed unit, including a second board disposed so as to be spaced apart from the first heat dissipation member and a second heat dissipation member disposed on the second board, and a support member, configured to support the moving unit to move relative to the fixed unit in a direction perpendicular to an optical-axis direction. The image sensor is coupled to the first heat dissipation member, and the second heat dissipation member is disposed so as to be spaced apart from the first heat dissipation member and to overlap the first heat dissipation member in the optical-axis direction.

A camera device according to another embodiment includes a second board, a second heat dissipation member disposed on the second board, a first heat dissipation member disposed on the second heat dissipation member, a first board disposed on the first heat dissipation member and including a hole, and an image sensor disposed on the first heat dissipation member. The image sensor is coupled to the first heat dissipation member to move in a direction perpendicular to an optical-axis direction, and the second heat dissipation member is disposed so as to be spaced apart from the first heat dissipation member and to overlap the first heat dissipation member in the optical-axis direction.

The second heat dissipation member may be disposed on the upper surface or the lower surface of the second board. The first heat dissipation member may include a protruding portion disposed in the hole in the first board.

The first heat dissipation member and the second heat dissipation member may be spaced apart from each other in the optical-axis direction by a spacing distance of 0.15 mm to 0.3 mm.

The first heat dissipation member and the second heat dissipation member may be spaced apart from each other in the optical-axis direction by a spacing distance of 0.15 mm to 0.5 mm.

The value obtained by dividing the spacing distance between the first heat dissipation member and the second heat dissipation member in the optical-axis direction by the thickness of the first heat dissipation member may be 1.4 to 3.75.

The value obtained by dividing the spacing distance between the first heat dissipation member and the second heat dissipation member in the optical-axis direction by the thickness of the first board may be 0.8 to 2.

The value obtained by dividing the spacing distance between the first heat dissipation member and the second heat dissipation member in the optical-axis direction by the thickness of the second board may be ⅔ to 2.

The value obtained by dividing the spacing distance between the first heat dissipation member and the second heat dissipation member in the optical-axis direction by the thickness of the second heat dissipation member may be 1.4 to 3.75.

The first heat dissipation member and the second heat dissipation member may have the same thickness.

The second heat dissipation member may overlap the first heat dissipation member in an area that is 80% to 100% of the area of the first heat dissipation member.

The first heat dissipation member may have an area that is 55% to 80% of the area of the second heat dissipation member.

Each of the first heat dissipation member and the second heat dissipation member may be a metal plate.

At least one of the first heat dissipation member or the second heat dissipation member may include a groove in order to increase a heat dissipation area.

The second heat dissipation member may be disposed on a first surface of the second board, which faces the first heat dissipation member, and the second board may include a first conductive layer, which is exposed to the first surface of the second board and is in contact with the second heat dissipation member.

The second board may include a second conductive layer connected to the first conductive layer and exposed from a second surface of the second board, which is formed opposite the first surface.

The second conductive layer may be conductively connected to a ground of the second board.

The groove may be formed in a predetermined pattern, and the predetermined pattern may be a stripe-shaped pattern, a net-shaped pattern, a mesh-shaped pattern, or a multiple dot-shaped pattern.

Advantageous Effects

The embodiments may improve heat dissipation effect through heat dissipation by the first and second heat dissipation members, and may inhibit an increase in the temperature of the camera device due to an increase in the amount of heat that is generated.

In addition, since an increase in temperature is inhibited, the embodiments may inhibit an increase in noise of the image sensor and deterioration in the resolution of the image sensor, and may inhibit deterioration in the reliability of auto-focusing due to expansion of the lens.

In addition, since a bore is formed in the second board unit, the embodiments may dispose the first board unit close to the second heat dissipation member, and thus may reduce the length (or the height) of the camera device in the optical-axis direction.

BEST MODE

The technical spirit of the disclosure is not limited to the embodiments to be described, and may be implemented in various other forms, and one or more of the components may be selectively combined and substituted for use without exceeding the scope of the technical spirit of the disclosure.

In addition, terms (including technical and scientific terms) used in the embodiments of the disclosure, unless specifically defined and described explicitly, are to be interpreted as having meanings that may be generally understood by those having ordinary skill in the art to which the disclosure pertains, and meanings of terms that are commonly used, such as terms defined in a dictionary, should be interpreted in consideration of the context of the relevant technology.

Further, the terms used in the embodiments of the disclosure are for explaining the embodiments and are not intended to limit the disclosure. In this specification, the singular forms may also include plural forms unless otherwise specifically stated in a phrase, and in the case in which “at least one (or one or more) of A, B, or C” is stated, it may include one or more of all possible combinations of A, B, and C.

In addition, in describing the components of the embodiments of the disclosure, terms such as “first”, “second”, “A”, “B”, “(a)”, and “(b)” can be used. Such terms are only for distinguishing one component from another component, and do not determine the nature, sequence, or procedure of the corresponding constituent elements.

In addition, when it is described that a component is “connected”, “coupled” or “joined” to another component, the description may include not only being directly “connected”, “coupled” or “joined” to the other component but also being “connected”, “coupled” or “joined” by another component between the component and the other component. In addition, in the case of being described as being formed or disposed “above (on)” or “below (under)” another component, the description includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or disposed between the two components. In addition, when expressed as “above (on)” or “below (under)”, it may refer to a downward direction as well as an upward direction with respect to one element.

Hereinafter, an AF moving unit may alternatively be referred to as a “lens moving apparatus”, a “lens moving unit”, a “voice coil motor (VCM)”, an “actuator”, or a “lens moving device”. Hereinafter, a coil may alternatively be referred to as a “coil unit”, and an elastic member may alternatively be referred to as an “elastic unit” or a “spring”.

In addition, in the following description, a terminal may alternatively be referred to as a “pad”, an “electrode”, a “conductive layer”, or a “bonding unit”.

In addition, in the following description, the terms “board unit”, “circuit board”, and “board” may be used interchangeably with each other.

For convenience of description, a camera device according to an embodiment will be described using the Cartesian coordinate system (x,y,z), but the embodiments are not limited thereto, and may be described using other coordinate systems. In the respective drawings, the x-axis and the y-axis may be directions perpendicular to the z-axis, which is an optical-axis direction, the z-axis direction, which is the direction of the optical axis OA, may be referred to as a “first direction”, the x-axis direction may be referred to as a “second direction”, and the y-axis direction may be referred to as a “third direction”. In addition, for example, the x-axis direction may be referred to as “any one of the first horizontal direction and the second horizontal direction”, and the y-axis direction may be referred to as “the other of the first horizontal direction and the second horizontal direction”.

In addition, for example, the optical axis may be the optical axis of a lens mounted to a lens barrel. The first direction may be a direction perpendicular to a capture area of an image sensor. In addition, for example, the optical-axis direction may be a direction parallel to the optical axis.

The camera device according to the embodiment may perform an “auto-focusing function”. Here, the auto-focusing function is a function of automatically focusing an image of a subject on the surface of an image sensor.

Hereinafter, the camera device may alternatively be referred to as a “camera module”, a “camera”, a “photographing device”, or a “lens moving device”.

In addition, the camera device according to the embodiment may perform a “hand-tremor compensation function”. Here, the hand-tremor compensation function is a function of inhibiting the contour of a captured still image from being blurred due to vibration caused by shaking of a hand of a user when capturing the still image.

FIG.1is a perspective view of a camera device10according to an embodiment,FIG.2is a perspective view of the camera device10, with a cover member300removed therefrom,FIG.3is an exploded perspective view of the camera device10inFIG.1,FIG.4Ais a cross-sectional view taken along line AB in the camera device10inFIG.1,FIG.4Bis a cross-sectional view taken along line CD in the camera device10inFIG.1,FIG.4Cis a cross-sectional view taken along line EF in the camera device10inFIG.1,FIG.5is an exploded perspective view of an AF moving unit100inFIG.3,FIG.6is a perspective view of a bobbin110, a sensing magnet180, a balancing magnet185, a first coil120, a circuit board190, a first position sensor170, and a capacitor195,FIG.7is a perspective view of the bobbin110, a housing140, the circuit board190, an upper elastic member150, the sensing magnet180, and the balancing magnet185, andFIG.8is a bottom perspective view of the housing140, the bobbin110, a lower elastic member160, a magnet130, and the circuit board190.

Referring toFIGS.1to8, the camera device10may include an AF moving unit100and an image sensor unit350.

The camera device10may further include at least one of a cover member300or a lens module400. The cover member300and a base210to be described later may constitute a case.

The AF moving unit100may be coupled to a lens module400, and may move the lens module in the direction of the optical axis OA or a direction parallel to the optical axis, thereby performing the auto-focusing function of the camera device10.

The image sensor unit350may include an image sensor810. The image sensor unit350may move the image sensor810in a direction perpendicular to the optical axis. In addition, the image sensor unit350may tilt the image sensor810relative to the optical axis, or may rotate (or roll) the image sensor810about the optical axis. The hand-tremor compensation function of the camera device10may be performed by the image sensor unit350.

In an example, the image sensor810may include a capture area for sensing the light that has passed through the lens module400. Here, the capture area may alternatively be referred to as an “effective area”, a “light-receiving area”, an “active area”, or a “pixel area”. For example, the capture area of the image sensor810may be a portion into which the light that has passed through a filter610is introduced so as to form an image contained in the light, and may include at least one unit pixel. For example, the capture area may include a plurality of unit pixels.

The AF moving unit100may alternatively be referred to as a “lens moving unit” or a “lens moving apparatus”. Alternatively, the AF moving unit100may alternatively be referred to as a “first moving unit (or second moving unit)”, a “first actuator (or second actuator)”, or an “AF driving unit”.

In addition, the image sensor unit350may alternatively be referred to as an “image sensor moving unit”, an “image sensor shift unit”, a “sensor moving unit”, or a “sensor shift unit”. Alternatively, the image sensor unit350may be referred to as a “second moving unit (or first moving unit)” or a “second actuator (or first actuator)”.

Referring toFIGS.5and6, the AF moving unit100may move the lens module in the optical-axis direction. In an example, the AF moving unit100moves a bobbin110in the optical-axis direction. In an example, the AF moving unit100may include the bobbin110, a first coil120, a magnet130, and a housing140. The AF moving unit100may further include an upper elastic member150and a lower elastic member160.

In addition, the AF moving unit100may further include a first position sensor170, a circuit board190, and a sensing magnet180in order to implement AF feedback. In addition, the AF moving unit100may further include at least one of a balancing magnet185or a capacitor195.

The bobbin110may be disposed in the housing140, and may be moved in the direction of the optical axis OA or the first direction (e.g. the z-axis direction) by the electromagnetic interaction between the first coil120and the magnet130.

The bobbin110may have a bore formed therein in order to be coupled to the lens module400or to mount the lens module400therein. In an example, the bore in the bobbin110may be a through-hole formed through the bobbin110in the optical-axis direction, and may have a circular shape, an elliptical shape, or a polygonal shape, without being limited thereto.

The lens module400may include at least one lens and/or a lens barrel.

For example, the lens module400may include one or more lenses and a lens barrel accommodating the one or more lenses. However, the disclosure is not limited thereto. Any of various holding structures may be used in place of the lens barrel, so long as the same is capable of supporting one or more lenses.

In an example, the lens module400may be screwed to the bobbin110. Alternatively, in another example, the lens module400may be coupled to the bobbin110by means of an adhesive (not shown). The light that has passed through the lens module400may pass through the filter610, and may be introduced into the image sensor810.

The bobbin110may be provided on the outer surface thereof with a protruding portion111. In an example, the protruding portion111may protrude in a direction parallel to a line perpendicular to the optical axis OA. However, the disclosure is not limited thereto.

The protruding portion111of the bobbin110may correspond to a recess portion25ain the housing140, and may be inserted into or disposed in the recess portion25ain the housing140. The protruding portion111may suppress or inhibit the bobbin110from rotating beyond a predetermined range about the optical axis. In addition, the protruding portion111may serve as a stopper for inhibiting the bobbin110from moving beyond a predetermined range in the optical-axis direction (e.g. the direction from the upper elastic member150toward the lower elastic member160) due to external impacts or the like.

The bobbin110may have a first escape recess112aformed in the upper surface thereof to avoid spatial interference with a first frame connection portion153of the upper elastic member150. In addition, the bobbin110may have a second escape recess112bformed in the lower surface thereof to avoid spatial interference with a second frame connection portion163of the lower elastic member160.

The bobbin110may include a first coupling portion116ain order to be coupled or secured to the upper elastic member150. In an example, the first coupling portion116aof the bobbin110may take the form of a protrusion, but the disclosure is not limited thereto. In another embodiment, the first coupling portion116aof the bobbin110may take the form of a flat surface or a recess.

In addition, the bobbin110may include a second coupling portion116bin order to be coupled or secured to the lower elastic member160. In an example, the second coupling portion116bof the bobbin110may take the form of a protrusion, but the disclosure is not limited thereto. In another embodiment, the second coupling portion116bof the bobbin110may take the form of a flat surface or a recess.

Referring toFIG.5, the bobbin110may have a recess105formed in the outer surface thereof to allow the first coil120to be seated, inserted, or disposed thereinto. The recess105in the bobbin110may have a closed curve shape (e.g. a ring shape), which coincides with the shape of the first coil120.

In addition, the bobbin110may have a first seating recess26aformed in the outer surface thereof to allow the sensing magnet180to be seated, inserted, secured, or disposed therein. In addition, the bobbin110may have a second seating recess26bformed in the outer surface thereof to allow the balancing magnet185to be seated, inserted, secured, or disposed therein. In an example, the first and second seating recesses26aand26bin the bobbin110may be formed in the outer surfaces of the bobbin110that face each other.

Referring toFIGS.5and7, a damper48may be disposed between the bobbin110and the upper elastic member150. In an example, the damper48may be disposed between the bobbin110and the first frame connection portion153of the upper elastic member150, and may be in contact with, coupled to, or attached to the bobbin110and the first frame connection portion153.

In an example, the bobbin110may be provided with a protrusion104protruding from the upper surface thereof so as to correspond to the first frame connection portion153of the upper elastic member150. In an example, the protrusion104may protrude from the bottom surface of the first escape recess in the bobbin110.

The damper48may be disposed between the protrusion104of the bobbin110and the first frame connection portion153of the upper elastic member150. The damper48may be in contact with and attached to the protrusion104of the bobbin110and the first frame connection portion153, and may serve to alleviate or absorb vibration of the bobbin110. For example, the damper48may be embodied as a damping member (e.g. silicon). The protrusion104may serve to guide the damper48.

The bobbin110may have a groove119or a groove portion formed in the upper surface thereof at a position corresponding to, facing, or overlapping the protruding portion305of the cover member300in the first direction (or the optical-axis direction). In an example, the groove119may be formed so as to be depressed into the bottom surface of the first escape recess112a. In another embodiment, the groove119may be formed so as to be depressed into the upper surface of the bobbin110.

The first coil120may be disposed on or coupled to the bobbin110. In an example, the first coil120may be disposed on the outer surface of the bobbin110. In an example, the first coil120may surround the outer surface of the bobbin110in the direction of rotation about the optical axis OA, but the disclosure is not limited thereto.

The first coil120may be directly wound around the outer surface of the bobbin110, but the disclosure is not limited thereto. In another embodiment, the first coil120may be wound around the bobbin110using a coil ring, or may be embodied as a coil block having an angled ring shape.

Power or a drive signal may be supplied to the first coil120. The power or the drive signal supplied to the first coil120may be a DC signal, an AC signal, or a signal containing both DC and AC components, and may be of a voltage type or a current type.

When a drive signal (e.g. drive current) is supplied to the first coil120, electromagnetic force may be generated by electromagnetic interaction with the magnet130, and the bobbin110may be moved in the direction of the optical axis OA by the generated electromagnetic force.

At the initial position of an AF operation unit, the bobbin110may be movable upwards or downwards, which is referred to as bidirectional driving of the AF operation unit. Alternatively, at the initial position of the AF operation unit, the bobbin110may be movable upwards, which is referred to as unidirectional driving of the AF operation unit.

For example, the maximum stroke of the bobbin110in the upward direction from the initial position thereof may be 400 micrometers to 500 micrometers, and the maximum stroke of the bobbin110in the downward direction from the initial position thereof may be 100 micrometers to 200 micrometers.

At the initial position of the AF operation unit, the first coil120may be disposed so as to correspond to or overlap the magnet130, which is disposed in the housing140, in a direction parallel to a line that is perpendicular to the optical axis OA and extends through the optical axis.

In an example, the AF operation unit may include the bobbin110and components coupled to the bobbin110(e.g. the first coil120, the sensing magnet180, and the balancing magnet185). In addition, the AF operation unit may further include the lens module400.

The initial position of the AF operation unit may be the original position of the AF operation unit in the state in which no electric power is supplied to the first coil120or the position at which the AF operation unit is located as the result of the upper and lower elastic members150and160being elastically deformed due only to the weight of the AF operation unit. In addition, the initial position of the bobbin110may be the position at which the AF operation unit is located when gravity acts in the direction from the bobbin110toward the base210or when gravity acts in the direction from the base210toward the bobbin110.

The sensing magnet180may provide a magnetic field, which is detected by the first position sensor170, and the balancing magnet185may cancel out the influence of the magnetic field of the sensing magnet180and may establish weight equilibrium with the sensing magnet180.

The sensing magnet180may alternatively be referred to as a “sensor magnet” or a “second magnet”. The sensing magnet180may be disposed on the bobbin110, or may be coupled to the bobbin110. The sensing magnet180may be disposed so as to face the first position sensor170. The balancing magnet185may be disposed on the bobbin110, or may be coupled to the bobbin110. In an example, the balancing magnet185may be disposed opposite the sensing magnet180.

In an example, each of the sensing magnet180and the balancing magnet185may be a unipolar magnet, which has one N pole and one S pole, but the disclosure is not limited thereto. In another embodiment, each of the sensing magnet180and the balancing magnet185may be a bipolar magnet or a 4-pole magnet, which includes two N poles and two S poles.

The sensing magnet180may be moved together with the bobbin110in the optical-axis direction, and the first position sensor170may detect the intensity of the magnetic field or the magnetic force of the sensing magnet180, which is moved in the optical-axis direction, and may output an output signal corresponding to the result of the detection.

In an example, the intensity of the magnetic field or the magnetic force detected by the first position sensor170may vary depending on displacement of the bobbin110in the optical-axis direction. The first position sensor170may output an output signal proportional to the detected intensity of the magnetic field, and the displacement of the bobbin110in the optical-axis direction may be detected using the output signal from the first position sensor170.

The housing140may be disposed in the cover member300. In an example, the housing140may be disposed on the image sensor unit350.

The housing140may accommodate therein the bobbin110, and may support the magnet130, the first position sensor170, and the circuit board190.

Referring toFIGS.5,7, and8, the housing140may be formed so as to take the overall shape of a hollow column. In an example, the housing140may have a polygonal (e.g. quadrangular or octagonal) or circular bore formed therein, and the bore in the housing140may take the form of a through-hole formed through the housing140in the optical-axis direction.

The housing140may include side portions, which correspond to or face side plates302of the cover member300, and corners, which correspond to or face the corners of the cover member300.

The housing300may be provided on the upper portion, the upper surface, or the upper end thereof with a stopper145in order to be inhibited from directly colliding with the inner surface of the upper plate301of the cover member300.

Referring toFIG.5, the housing140may have a mounting groove (or a seating groove)14aformed therein to accommodate the circuit board190. The mounting groove14amay have a shape coinciding with the shape of the circuit board190.

Referring toFIG.7, the housing140may have an opening formed therein to expose terminals B1to B4of a terminal unit95of the circuit board190therethrough. The opening may be formed in the side portion of the housing140.

The housing140may be provided on the upper portion, the upper end, or the upper surface thereof with at least one first coupling portion for coupling to a first outer frame152of the upper elastic member150. The housing140may be provided on the lower portion, the lower end, or the lower surface thereof with a second coupling portion for coupling and securing to a second outer frame162of the lower elastic member160. For example, each of the first and second coupling portions of the housing140may be formed in the shape of a flat surface, a protrusion, or a recess.

The magnet130may be disposed on the housing140, which is a fixed part. In an example, the magnet130may be disposed on the side portion of the housing140. The magnet130may be a driving magnet for implementing AF operation. In another embodiment, the magnet130may be disposed on the corner portion of the housing.

For example, the magnet130may include a plurality of magnet units. In an example, the magnet130may include first to fourth magnet units130-1to130-4disposed on the housing140. In another embodiment, the magnet130may include two or more magnet units.

The magnet130may be disposed on at least one of the side portion or the corner of the housing140. In an example, at least a portion of the magnet130may be disposed on the side portion or the corner of the housing140. Alternatively, in another example, at least a portion of the magnet130may be disposed on the corner of the housing140, and the remaining portion of the magnet130may be disposed on the side portion of the housing140.

For example, each of the magnet units130-1to130-4may include a first portion disposed on a corresponding corner, among the four corners of the housing130. In addition, each of the magnet units130-1to130-4may include a second portion disposed on the side portion of the housing140that is adjacent to the corresponding corner of the housing140.

In an example, the first magnet unit130-1and the second magnet unit130-2may correspond to or face each other in the first horizontal direction (e.g. the y-axis direction). The second magnet unit130-2and the third magnet unit130-3may correspond to or face each other in the second horizontal direction (e.g. the x-axis direction). The third magnet unit130-3and the fourth magnet unit130-4may correspond to or face each other in the first horizontal direction (e.g. the y-axis direction). The fourth magnet unit130-4and the first magnet unit130-1may correspond to or face each other in the second horizontal direction (e.g. the x-axis direction).

At the initial position of the AF operation unit, the magnet130may be disposed on the housing140such that at least a portion thereof overlaps the first coil120in a direction parallel to a line that is perpendicular to the optical axis OA and extends through the optical axis OA.

The magnet130may be a unipolar magnet, which has one N pole and one S pole. In another embodiment, the magnet130may be a bipolar magnet or a 4-pole magnet, which includes two N poles and two S poles.

In an example, the magnet130may be a common magnet for implementing AF operation and OIS operation.

The circuit board190may be disposed in the housing140. The first position sensor170may be disposed or mounted on the circuit board190, and may be conductively connected to the circuit board190. In an example, the circuit board190may be disposed in the mounting groove14ain the housing140, and the terminals95of the circuit board190may be exposed outside the housing140.

The circuit board190may be provided with a terminal unit95including a plurality of terminals B1to B4for conductive connection to an external terminal or an external device. The plurality of terminals B1to B4of the circuit board190may be conductively connected to the first position sensor170.

The first position sensor170may be disposed on a first surface of the circuit board190, and the plurality of terminals B1to B4may be disposed on a second surface of the circuit board190. Here, the second surface of the circuit board190may be a surface opposite the first surface of the circuit board190. For example, the first surface of the circuit board190may be the surface of the circuit board190that faces the bobbin110or the sensing magnet180.

For example, the circuit board190may be a printed circuit board or a flexible printed circuit board (FPCB).

The circuit board190may include a circuit pattern or wiring (not shown) for conductively connecting the first to fourth terminals B1to B4to the first position sensor170.

In an example, at the initial position of the AF operation unit, at least a portion of the first position sensor170may face or overlap the sensing magnet180in a direction parallel to a line that is perpendicular to the optical axis OA and extends through the optical axis OA. In another embodiment, at the initial position of the AF operation unit, the first position sensor may not face or overlap the sensing magnet.

The first position sensor170serves to detect the movement, displacement, or position of the bobbin110in the optical-axis direction. That is, when the bobbin110is moved, the first position sensor170may detect the magnetic field or the intensity of the magnetic field of the sensing magnet180mounted to the bobbin110, and may output an output signal corresponding to the result of the detection. The movement, displacement, or position of the bobbin110in the optical-axis direction may be detected using the output from the first position sensor170.

The first position sensor170may be a driver IC including a Hall sensor and a driver. The first position sensor170may include first to fourth terminals for transmitting and receiving data to and from the outside through data communication using a protocol, such as I2C communication, and fifth and sixth terminals for directly supplying a drive signal to the first coil120.

The first position sensor170may be conductively connected to the first to fourth terminals B1to B4of the circuit board190. In an example, each of the first to fourth terminals of the first position sensor170may be conductively connected to a corresponding one of the first to fourth terminals B1to B4of the circuit board190.

The fifth and sixth terminals of the first position sensor170may be conductively connected to the first coil120. In an example, the first position sensor170may be conductively connected to the first coil120via at least one of the upper elastic member150or the lower elastic member160, and may supply a drive signal to the first coil120.

In an example, a portion of the first lower elastic member160-1may be connected to one end of the first coil120, and another portion of the first lower elastic member160-1may be conductively connected to the circuit board190. A portion of the second lower elastic member160-2may be connected to the other end of the first coil120, and another portion of the second lower elastic member160-2may be conductively connected to the circuit board190. The fifth and sixth terminals of the first position sensor170may be conductively connected to the first and second lower elastic members160-1and160-2and the first coil120via the circuit board190.

In another embodiment, the first coil may be conductively connected to the circuit board190and the fifth and sixth terminals of the first position sensor170via the two upper elastic members.

For example, in an embodiment in which the first position sensor170is a driver IC, the first and second terminals B1and B2of the circuit board190may be a power terminal for supplying power, the third terminal may be a terminal for transmitting and receiving a clock signal, and the fourth terminal may be a terminal for transmitting and receiving a data signal.

In another embodiment, the first position sensor170may be a Hall sensor. In this case, the first position sensor170may include two input terminals for receiving a drive signal or power supplied thereto and two output terminals for outputting a sensing voltage (or output voltage). In an example, a drive signal may be supplied to the first position sensor170through the first and second terminals B1and B2of the circuit board190, and the output from the first position sensor170may be output to the outside through the third and fourth terminals B3and B4. In addition, the first coil120may be conductively connected to the circuit board190. The circuit board190may further include two separate terminals in addition to the first to fourth terminals B1to B4, and a drive signal may be supplied to the first coil120from outside through the two separate terminals.

In an example, among the power terminals of the first position sensor170, a ground terminal may be conductively connected to the cover member300.

The capacitor195may be disposed or mounted on the first surface of the circuit board190. The capacitor195may be of a chip type. In this case, the chip may include a first terminal, which corresponds to one end of the capacitor195, and a second terminal, which corresponds to the other end of the capacitor195. The capacitor195may alternatively be referred to as a “capacitive element” or a “condenser”.

The capacitor195may be conductively connected in parallel to the first and second terminals B1and B2of the circuit board190, through which power (or a drive signal) is supplied to the first position sensor170from the outside. Alternatively, the capacitor195may be conductively connected in parallel to the terminals of the first position sensor170, which are conductively connected to the first and second terminals B1and B2of the circuit board190.

Since the capacitor195is conductively connected in parallel to the first and second terminals B1and B2of the circuit board190, the capacitor195may serve as a smoothing circuit for removing ripple components included in power signals GND and VDD, which are supplied to the first position sensor170from the outside, and thus may supply stable and consistent power signals to the first position sensor170.

The upper elastic member150may be coupled to the upper portion, the upper end, or the upper surface of the bobbin110and to the upper portion, the upper end, or the upper surface of the housing140, and the lower elastic member160may be coupled to the lower portion, the lower end, or the lower surface of the bobbin110and to the lower portion, the lower end, or the lower surface of the housing140.

The upper elastic member150and the lower elastic member160may elastically support the bobbin110with respect to the housing140.

The upper elastic member150may include a plurality of upper elastic units150-1and150-2, which are conductively separated or isolated from each other, and the lower elastic member160may include a plurality of lower elastic units160-1and160-2, which are conductively separated or isolated from each other.

Although each of the upper elastic member and the lower elastic member is described as including two elastic units, the disclosure is not limited thereto. In another embodiment, at least one of the upper elastic member or the lower elastic member may be embodied as a single unit or a single construction.

The upper elastic member150may further include a first inner frame151coupled or secured to the upper portion, the upper surface, or the upper end of the bobbin110, a second inner frame152coupled or secured to the upper portion, the upper surface, or the upper end of the housing140, and a first frame connection portion153interconnecting the first inner frame151and the first outer frame152.

The lower elastic member160may further include a second inner frame161coupled or secured to the lower portion, the lower surface, or the lower end of the bobbin110, a second outer frame162coupled or secured to the lower portion, the lower surface, or the lower end of the housing140, and a second frame connection portion163interconnecting the second inner frame161and the second outer frame162. The inner frame may alternatively be referred to as an “inner portion”, the outer frame may alternatively be referred to as an “outer portion”, and the frame connection portion may alternatively be referred to as a “connection portion”.

Each of the first and second frame connection portions153and163may be formed so as to be bent or curved at least once to form a predetermined pattern.

Each of the upper elastic member150and the lower elastic member160may be formed of a conductive material, such as a metal material. In addition, each of the upper elastic member150and the lower elastic member160may be embodied as an elastic member, such as a leaf spring.

Referring toFIG.8, the circuit board190may be provided with two pads5aand5b. The two pads5aand5bmay be conductively connected to the first position sensor170. In an example, the two pads5aand5bmay be conductively connected to the fifth and sixth terminals of the first position sensor170.

In addition, the first pad5aof the circuit board190may be conductively connected to the first lower elastic unit160-1, and the second pad5bof the circuit board190may be conductively connected to the second lower elastic unit160-2.

In an example, the second outer frame162of the first lower elastic unit160-1may include a first bonding portion4a, which is coupled or conductively connected to the first pad5aof the circuit board190, and the second outer frame162of the second lower elastic unit160-2may include a second bonding unit4b, which is conductively connected to the second pad5bof the circuit board190.

In another embodiment, at least one of the upper elastic member150or the lower elastic member160may include two elastic members. In an example, each of the two elastic members of any one of the upper elastic member150and the lower elastic member160may be coupled or conductively connected to a corresponding one of the first and second pads of the circuit board190, and the first coil120may be conductively connected to the two elastic members.

FIG.9is a perspective view of the image sensor unit350,FIG.10Ais a first exploded perspective view of the image sensor unit350inFIG.9,FIG.10Bis a second exploded perspective view of the image sensor unit350inFIG.9,FIG.11is a perspective view of the holder270, the second coil230, the image sensor810, the OIS position sensor240, and the first board unit255inFIG.10A,FIG.12Ais a first perspective view of the first board unit255, the image sensor810, and a first heat dissipation member370,FIG.12Bis a second perspective view of the first board unit255, the image sensor810, and the first heat dissipation member370,FIG.13Ais a rear perspective view of a second board unit800and a second heat dissipation member380,FIG.13Bis a plan view of the first board unit255and the second board unit800,FIG.14Ais a bottom perspective view of the holder270,FIG.14Billustrates the holder270, the first board unit255, and a support board310,FIG.15is a perspective view of the holder270, the second coil230, the first board unit255, the image sensor810, and the support board310,FIG.16illustrates embodiments of the support board,FIG.17is a bottom perspective view of a first circuit board250and the support board310,FIG.18Ais a first perspective view of the support board310coupled to the holder270and to the base210,FIG.18Bis a second perspective view of the support board310coupled to the holder270and to the base210,FIG.19Ais a bottom view of the first board unit255, the holder270, the support board310, and an elastic member315,FIG.19Bis a cross-sectional view taken along line GH inFIG.19A,FIG.19Cis a cross-sectional view taken along line IJ inFIG.19A, andFIG.19Dis a cross-sectional view taken along line KL inFIG.19A.

Referring toFIGS.9to19D, the image sensor unit350may include a fixed unit and an OIS moving unit spaced apart from the fixed unit. The image sensor unit350may include a support board310interconnecting the fixed unit and the OIS moving unit. The image sensor unit350may further include an elastic member315for elastically supporting the OIS moving unit with respect to the fixed unit.

Although not shown in the drawings, in another embodiment, the camera device may further include a wire or a wire spring interconnecting the fixed unit (e.g. the AF moving unit) and the OIS moving unit. In an example, one end of the wire may be coupled to the housing140(or the upper elastic member150), and the other end of the wire may be coupled to the holder270. In an example, one end of the wire may be coupled to the upper elastic member by means of solder. In an example, the other end of the wire may be coupled to a conductive terminal, which is disposed on the holder270, by means of solder.

In an example, the wire may be disposed in the optical-axis direction. In an example, the wire may be disposed on the corner of the housing140and/or the corner of the holder270. In an example, the wire may include four wires, and each of the four wires may be disposed on a corresponding one of the four corners of the housing140and/or a corresponding one of the four corners of the holder270. In an example, a terminal may be disposed on each corner of the holder270in order to be coupled to a corresponding one of the four wires.

The support board310may support the OIS moving unit with respect to the fixed unit such that the OIS moving unit is capable of moving in a direction perpendicular to the optical axis or such that the OIS moving unit is capable of tilting or rotating within a predetermined range about the optical axis.

The OIS moving unit may include an image sensor810. In an example, the OIS moving unit may include a first board unit255, an image sensor810disposed on the first board unit255, and a first heat dissipation member370disposed on the first board unit255. In addition, in an example, the OIS moving unit may further include a second coil230disposed so as to face the magnet130in the optical-axis direction and a second position sensor240disposed on the first board unit255.

The OIS moving unit may further include a holder270disposed between the second coil230and the first board unit255and accommodating the first board unit255. The holder270may alternatively be referred to as a “spacing member”. In another embodiment, the holder270may be omitted, and the second coil230may be disposed on the first board unit255, for example, the first circuit board250.

The OIS moving unit may further include a filter610. The OIS moving unit may further include a filter holder600for accommodating the filter610.

The fixed unit may include a second board unit800spaced apart from the first board unit255and conductively connected to the first board unit255. In addition, the fixed unit may include a housing140of the AF moving unit and a magnet130disposed in the housing140. The board unit may alternatively be referred to as a “board”, a “circuit board”, or a “printed circuit board”.

The fixed unit may further include a base210accommodating the second board unit800and coupled to the cover member300. The base210may be coupled to the second board unit800. In addition, the fixed unit may further include the cover member300coupled to the base210. In addition, in an example, the housing140of the AF moving unit may also correspond to the fixed unit.

The holder270may be disposed under the AF moving unit. In an example, the holder270may be embodied as a non-conductive member. In an example, the holder270may be made of an injection-molded material, which can be easily embodied through an injection-molding process. In addition, the holder27may be formed of an insulating material. For example, the holder270may be formed of a resin or plastic material.

Referring toFIGS.11,14A,14B, and15, the holder270may include an upper surface42A, a lower surface42B formed opposite the upper surface42A, and a side surface42C interconnecting the upper surface42A and the lower surface42B. In an example, the lower surface42B of the holder270may face or be located opposite the second board unit800.

The holder270may support the first board unit255, and may be coupled to the first board unit255. In an example, the first board unit255may be disposed under the holder270. In an example, the lower portion, the lower surface, or the lower end of the holder270may be coupled to the upper portion, the upper surface, or the upper end of the first board unit255.

Referring toFIG.14A, the lower surface42B of the holder270may include a first surface36A and a second surface36B. The second surface36B may have a height difference with respect to the first surface36A in the optical-axis direction. In an example, the second surface36B may be located above (or at a higher position than) the first surface36A. In an example, the second surface36B may be located closer to the upper surface42A of the holder270than the first surface36A. In an example, the distance between the upper surface42A of the holder270and the second surface36B may be shorter than the distance between the upper surface42A of the holder270and the first surface36A.

The holder270may include a third surface36C interconnecting the first surface36A and the second surface36B. In an example, the first surface36A and the second surface36B may be parallel to each other, and the third surface36C may be perpendicular to the first surface36A and/or the second surface36B, but the disclosure is not limited thereto. In another embodiment, the included angle between the third surface36C and the first surface36A (or the second surface36B) may be an acute angle or an obtuse angle. In an example, the first surface36A and the second surface36B may be located on the edge of the lower surface42B of the holder270.

The holder270may accommodate or support the second coil230. The holder270may support the second coil230such that the second coil230is spaced apart from the first board unit255.

The holder270may have a bore70formed therein so as to correspond to one region on the first board unit255. In an example, the bore70in the holder270may be a through-hole formed through the holder270in the optical-axis direction. In an example, the bore70in the holder270may correspond to, face, or overlap the image sensor810in the optical-axis direction.

The shape of the bore70in the holder270viewed from above may be a polygonal shape, such as a quadrangular shape, a circular shape, or an elliptical shape, but the disclosure is not limited thereto. The bore70in the holder270may be formed in any of various shapes.

In an example, the bore70in the holder270may have a shape or a size suitable for exposing the image sensor810, a portion of the upper surface of the first circuit board250, a portion of the upper surface of the second circuit board260, and various elements. In an example, the area of the bore70in the holder270may be larger than the area of the image sensor810, and may be smaller than the area of the first surface of the first circuit board250. In an example, the bore70may be formed in the second surface36B of the lower surface42B of the holder270.

The holder270may have holes41A,41B, and41C formed therein so as to correspond to the second position sensor240. In an example, the holder270may have holes41A,41B, and41C formed therein at positions corresponding to first to third sensors240A,240B, and240C of the second position sensor240.

In an example, the holes41A,41B, and41C may be disposed adjacent to the corners of the holder270. The holder270may have a dummy hole41D formed therein at a position that does not correspond to the second position sensor240and is adjacent to the corner of the holder270that does not correspond to the second position sensor240. The dummy hole41D may be formed in order to enable weight balancing of the OIS moving unit during OIS operation. In another embodiment, the dummy hole41D may not be formed.

The holes41A,41B, and41C may be through-holes formed through the holder270in the optical-axis direction. In an example, the holes41A,41B, and41C may be formed in the second surface36B of the lower surface42B of the holder270, but the disclosure is not limited thereto. In another embodiment, the holes41A,41B, and41C may be formed in the first surface of the lower surface of the holder270. In still another embodiment, the holes41A,41B, and41C may be omitted from the holder270.

The holder270may be provided on the upper surface42A thereof with at least one coupling protrusion51for coupling to the second coil230. The coupling protrusion51may protrude from the upper surface42A of the holder270toward the AF moving unit. In an example, the coupling protrusion51may be formed adjacent to each of the holes41A to41D in the holder270.

In an example, two coupling protrusions51A and51B may be disposed or arranged so as to correspond to respective holes41A,41B,41C, and41D in the holder270. In an example, each of the holes41A,41B,41C, and41D in the holder270may be located between the two coupling protrusions51A and51B.

The first board unit255may include a first circuit board250and a second circuit board260, which are conductively connected to each other. The second circuit board260may alternatively be referred to as a “sensor board”.

The first board unit255may be disposed on the lower surface42B of the holder270. In an example, the first board unit255may be disposed on the second surface36B of the lower surface42B of the holder270. In an example, the first circuit board250may be disposed on the second surface36B of the lower surface42B of the holder270. In an example, the first surface60A (refer toFIG.12A) of the first circuit board250may be coupled or attached to the second surface36B of the lower surface42B of the holder270by means of an adhesive member.

In this case, the first surface60A of the first circuit board250may be a surface that faces the AF moving unit and on which the second position sensor240is disposed. In addition, the second surface60B of the first circuit board250may be a surface formed opposite the first surface60A of the first circuit board250.

The first circuit board250may alternatively be referred to as a “sensor board”, a “main board”, a “main circuit board”, a “sensor circuit board”, or a “moving circuit board”. In all of the embodiments, the first circuit board250may alternatively be referred to as a “second board” or a “second circuit board”, and the second circuit board260may alternatively be referred to as a “first board” or a “first circuit board”.

The second position sensors240A,240B, and240C may be disposed on the first circuit board250in order to detect movement of the OIS moving unit in a direction perpendicular to the optical-axis direction and/or rotation, tilting, or rolling of the OIS moving unit about the optical axis. In addition, a controller830and/or a circuit element (e.g. a capacitor) may be disposed on the first circuit board250. The image sensor810may be disposed on the second circuit board260.

The first circuit board250may include first terminals E1to E8to be conductively connected to the second coil230. Here, the first terminals E1to E8may alternatively be referred to as “first pads” or “first bonding parts”. The first terminals E1to E8of the first circuit board250may be disposed or arranged on the first surface60A of the first circuit board250. For example, the first circuit board250may be a printed circuit board or a flexible printed circuit board (FPCB).

The first circuit board250may have a bore250A formed therein so as to correspond to or face the lens module400and the bore in the bobbin110. In an example, the bore250A in the first circuit board250may be a through-hole or a cavity formed through the first circuit board250in the optical-axis direction, and may be formed in the center of the first circuit board250.

When viewed from above, the shape of the first circuit board250, for example the outer circumferential shape thereof, may be a shape coinciding with or corresponding to the shape of the holder270, for example, a quadrangular shape. In addition, when viewed from above, the shape of the bore250A in the first circuit board250may be a polygonal shape such as a quadrangular shape, a circular shape, or an elliptical shape. In an example, the bore250A in the first circuit board250may open or expose the image sensor810and/or the bore262in the second circuit board260.

In addition, the first circuit board250may include at least one second terminal251to be conductively connected to the second circuit board260. Here, the second terminal251may alternatively be referred to as a “second pad” or a “second bonding part”. The second terminal251of the first circuit board250may be disposed or arranged on the second surface60B of the first circuit board250.

In an example, the at least one second terminal251may be provided in a plural number, and the plurality of second terminals251may be disposed or arranged in a region between the bore250A in the first circuit board250and any one side of the first circuit board250in a direction parallel to the side of the first circuit board250. In an example, the plurality of second terminals251may be arranged around the bore250A.

The second circuit board260may be disposed under the first circuit board250.

When viewed from above, the shape of the second circuit board260may be a polygonal shape (e.g. a quadrangular shape, a square shape, or a rectangular shape), but the disclosure is not limited thereto. In another embodiment, the shape of the second circuit board260may be a circular shape or an elliptical shape.

In an example, when the shape of the second circuit board260is a quadrangular shape, the area of the front surface of the second circuit board260may be larger than the area of the bore250A in the first circuit board250. In an example, the lower side of the bore250A in the first circuit board250may be shielded or blocked by the second circuit board260.

In an example, when viewed from above or below, the outer side surface (or the side) of the second circuit board260may be located between the outer side surface (or the side) of the first circuit board250and the bore250A in the first circuit board250.

In an example, the second circuit board260may have a bore262formed therein so as to correspond to the bore250A in the first circuit board250and/or the image sensor810. The bore262in the second circuit board260may be a hole or a cavity formed through the second circuit board260in the optical-axis direction, and may be formed in the center of the second circuit board260.

In an example, the bore262in the second circuit board260may open or expose the image sensor810. In an example, the image sensor810may be disposed in the bore262in the second circuit board260.

In another embodiment, the bore262may not be formed in the second circuit board260, and the image sensor810may be disposed on a first surface260A of the second circuit board260.

Referring toFIGS.12A and12B, the second circuit board260may include at least one terminal261conductively connected to the at least one second terminal251of the first circuit board250. In an example, a plurality of terminals261may be provided on the second circuit board260.

In an example, the at least one terminal261of the second circuit board260may be formed on the side surface or the outer side surface of the second circuit board260that connects the first surface260A of the second circuit board260to a second surface260B thereof. The first surface260A may be a surface facing the first circuit board250, and the second surface260B may be a surface formed opposite the first surface260A. In an example, the terminal261may take the form of a recess depressed into the side surface of the second circuit board260. Alternatively, in another example, the terminal261may take the form of a semicircular-shaped or a semi-elliptical-shaped via formed in the side surface of the second circuit board260. In another embodiment, the at least one terminal of the second circuit board260that is conductively connected to the second terminal251of the first circuit board250may be formed on the first surface260A of the second circuit board260.

In an example, the terminal261of the second circuit board260may be coupled to the terminal251of the first circuit board250by means of solder or a conductive adhesive member.

Each of the first and second circuit boards250and260may be, for example, a printed circuit board or an FPCB. Further, at least one of the first and second circuit boards250and260may be an organic substrate or a ceramic substrate.

Referring toFIG.12B, the second circuit board260may have a recess265formed in the second surface260B thereof to receive or dispose the first heat dissipation member370therein.

In an example, the recess265may include a bottom surface265A, which has a height difference with respect to the second surface260B of the second circuit board260in the optical-axis direction, and a side surface265B, which is located between the bottom surface265A and the second surface260B.

The recess265may have a shape corresponding to or coinciding with the first heat dissipation member370, for example, a polygonal shape (e.g. a quadrangular shape). In an example, the bore262may be formed through the bottom surface265A of the recess265, and may open or expose at least a portion of the first heat dissipation member370.

The image sensor810may be disposed on, attached to, or coupled to at least a portion of the first heat dissipation member370that is exposed by the bore262. In an example, the image sensor810may be secured, attached, or coupled to the first heat dissipation member370by means of an adhesive.

In an example, at least a partial region of a first surface371of the first heat dissipation member370may be exposed by the bore262, and the image sensor810may be disposed on, attached to, or coupled to at least a partial region of the first surface371of the first heat dissipation member370that is exposed by the bore262.

The first heat dissipation member370may be disposed on the first board unit255. In an example, the first heat dissipation member370may be disposed on the second circuit board260. In an example, the first heat dissipation member370may be disposed on the second surface260B of the second circuit board260.

In an example, the first heat dissipation member370may be disposed or seated in the recess265in the second circuit board260. In an example, the first surface371of the first heat dissipation member370may be attached or coupled to the bottom surface of the recess265in the second circuit board260. The first surface371of the first heat dissipation member370may be a surface that faces the second surface260B of the second circuit board260or the bottom surface265B of the recess265. Since the first heat dissipation member370is disposed in the recess265, the distance from a heat source of the second board unit255may be reduced, and accordingly, the heat dissipation effect may be improved.

In an example, the first heat dissipation member370may be embodied as a plate-type member having a predetermined thickness and hardness. In addition, the first heat dissipation member370may improve the effect of dissipating the heat generated from the heat source of the first board unit255to the outside. In this case, the heat source of the first board unit255may be an electronic element (or a circuit element) disposed on the first board unit255, for example, at least one of the image sensor810, the controller830, the second position sensor240, or the capacitor.

In an example, the first heat dissipation member370may include a metal material having high thermal conductivity and high heat dissipation efficiency, for example at least one of SUS, aluminum, nickel, phosphorus, bronze, or copper.

For example, the thermal conductivity of the first heat dissipation member370may be 200 or more. For example, the thermal conductivity of the first heat dissipation member370may be 200 to 1000. Alternatively, for example, the thermal conductivity of the first heat dissipation member370may be 10 to 1000.

In addition, the first heat dissipation member370may serve as a reinforcement member for stably supporting the image sensor810and inhibiting the image sensor from being damaged by external impacts or contact.

In another embodiment, the first heat dissipation member370may be formed of a thermally conductive material having high thermal conductivity, for example, thermally conductive epoxy, thermally conductive plastic, or thermally conductive synthetic resin. In the first heat dissipation member370and a second heat dissipation member380to be described later, the heat dissipation member may alternatively be referred to as a “plate”, a “metal plate”, a “reinforcement member”, or a “stiffener”.

The first heat dissipation member370may include at least one groove or at least one uneven portion373formed in a predetermined pattern in order to improve the heat dissipation effect. In an example, the groove or the uneven portion373may be formed in a predetermined pattern in a second surface372of the first heat dissipation member370. The second surface372may be a surface formed opposite the first surface371of the first heat dissipation member370.

In an example, a plurality of grooves may be formed in a predetermined pattern such that the grooves are spaced apart from each other by a predetermined interval. In an example, the predetermined pattern may have a stripe shape. In another embodiment, the predetermined pattern may have a net shape or a mesh shape. In still another embodiment, a plurality of dots may be formed in a predetermined pattern such that the dots are spaced apart from each other. The shape of each dot may be, for example, a circular shape, an elliptical shape, or a polygonal shape (e.g. a quadrangular shape).

In another embodiment, a predetermined pattern may be formed in at least one of the first surface371or the second surface372of the first heat dissipation member370.

In another embodiment, the first heat dissipation member may include a hole or a through-hole in place of the groove or the uneven portion373. In another embodiment, the first heat dissipation member may include a plurality of through-holes. The description of the groove or the uneven portion373formed in a predetermined pattern may also apply to the through-hole formed in the first heat dissipation member370according to the other embodiment.

Because the first heat dissipation member370moves together with the OIS moving unit, the first heat dissipation member370may be spaced apart from the fixed unit, for example, the second board unit800.

The second coil230may be disposed on the holder270. The second coil230may be disposed on the upper surface42A of the holder270. The second coil230may be disposed under the magnet130.

The second coil230may be coupled to the holder270. In an example, the second coil230may be coupled or attached to the upper surface42A of the holder270. In an example, the second coil230may be coupled to the coupling protrusion51of the holder270.

The OIS moving unit may be moved by interaction between the second coil230and the magnet130.

In an example, the second coil230may correspond to, face, or overlap the magnet130disposed on the fixed unit in the direction of the optical axis OA. In another embodiment, the fixed unit may include a separate OIS-dedicated magnet in addition to the magnet of the AF moving unit, and the second coil may correspond to, face, or overlap the OIS-dedicated magnet. In this case, the number of OIS-dedicated magnets may be the same as the number of coil units included in the second coil230.

In an example, the second coil230may include a plurality of coil units230-1to230-4. In an example, the second coil230may include four coil units230-1to230-4respectively disposed on the four corners of the holder270.

Each of the coil units230-1to230-4may take the form of a coil block having a closed curve shape or a ring shape. In an example, each coil unit may have a cavity or a hole formed therein. In an example, each of the coil units may be embodied as a fine pattern (FP) coil, a wound coil, or a coil block.

In another embodiment, the second coil230may be disposed on the first circuit board250, or may be coupled to the first circuit board250.

The second coil230may be conductively connected to the first circuit board250. In an example, the first coil unit230-1may be conductively connected to the two first terminals E1and E2of the first circuit board250, the second coil unit230-2may be conductively connected to two other first terminals E3and E4of the first circuit board250, the third coil unit230-3may be conductively connected to two other first terminals E5and E6of the first circuit board250, and the fourth coil unit230-4may be conductively connected to two other first terminals E7and E8of the first circuit board250.

Power or a drive signal may be supplied to the first to fourth coil units230-1to230-4through the first circuit board250. The power or the drive signal supplied to the second coil230may be a DC signal, an AC signal, or a signal containing both DC and AC components, and may be of a current type or a voltage type.

The OIS moving unit may be moved in the first horizontal direction or the second horizontal direction, or may be rolled about the optical axis by interaction between the first to fourth magnet units130-1to130-4and the first to fourth coil units230-1to230-4.

In an example, current may be independently applied to at least three coil units among the four coil units230-1to230-4. In another embodiment, current may be independently applied to at least two coil units among the four coil units230-1to230-4.

The controller830or780may supply at least one drive signal to at least one of the first to fourth coil units230-1to230-4, and may control the at least one drive signal such that the OIS moving unit is moved in the x-axis direction and/or the y-axis direction or is rotated within a predetermined angular range about the optical axis. The “controller” may be at least one of the controller830of the camera module10or the controller780of an optical instrument200A.

When the second coil230is driven in a three-channel drive mode, three independent drive signals may be supplied to the second coil230. In an example, among the four coil units, two coil units (e.g.230-2and230-4, or230-1and230-3), which face each other in an oblique direction, may be connected in series to each other. One drive signal may be supplied to the two coil units connected in series to each other, and an independent drive signal may be supplied to each of the remaining two coil units, among the four coil units.

Alternatively, when the second coil230is driven in a four-channel drive mode, an independent drive signal may be supplied to each of the four coil units230-1to230-4, which are separated from each other.

FIG.20Ais a view for explaining movement of the OIS moving unit in the x-axis direction, andFIG.20Bis a view for explaining movement of the OIS moving unit in the y-axis direction.

The N pole and the S pole of each of the first and third magnet units130-1and130-3, which face each other in a first oblique direction, may be disposed so as to face each other in the first horizontal direction (e.g. the y-axis direction). In addition, the N pole and the S pole of each of the second and fourth magnet units130-2and130-4, which face each other in a second oblique direction, which is perpendicular to the first oblique direction, may be disposed so as to face each other in the second horizontal direction (e.g. the x-axis direction).

That is, the direction in which the N pole and the S pole of the first magnet unit130-1face each other may be the same as or parallel to the direction in which the N pole and the S pole of the third magnet unit130-3face each other. In addition, the direction in which the N pole and the S pole of the second magnet unit130-2face each other may be the same as or parallel to the direction in which the N pole and the S pole of the fourth magnet unit130-4face each other.

Referring toFIG.20A, based on the boundary line (or the interface) between the N pole and the S pole of each of the first to fourth magnet units130-1to130-4, the N pole may be located at a further inward position, and the S pole may be located at a further outward position. In another embodiment, based on the boundary line between the N pole and the S pole, the S pole may be located at a further inward position, and the N pole may be located at a further outward position. The boundary line (or the interface) may be a portion that separates the N pole and the S pole from each other, and has substantially no magnetism and thus almost no polarity. In the case in which the magnet130is a bipolar magnet or a 4-pole magnet, the boundary line may correspond to the partition wall. In this case, the partition wall may be a non-magnetic member, air, or the like, and may be referred to as a “neutral zone” or a “neutral region”.

Referring toFIG.20A, the OIS moving unit may be moved or shifted in the x-axis direction by first electromagnetic force Fx1or Fx3, which is generated by interaction between the second coil unit230-2and the second magnet unit130-2, and second electromagnetic force Fx2or Fx4, which is generated by interaction between the fourth coil unit230-4and the fourth magnet unit130-4. In an example, the direction of the first electromagnetic force Fx1or Fx3and the direction of the second electromagnetic force Fx2or Fx4may be the same as each other.

Referring toFIG.20B, the OIS moving unit may be moved or shifted in the y-axis direction by third electromagnetic force Fy1or Fy3, which is generated by interaction between the first coil unit230-1and the first magnet unit130-1, and fourth electromagnetic force Fy2or Fy4, which is generated by interaction between the third coil unit230-3and the third magnet unit130-3. In an example, the direction of the third electromagnetic force Fy1or Fy3and the direction of the fourth electromagnetic force Fy2or Fy4may be the same as each other.

FIG.20Cis a view for explaining rotation of the OIS moving unit in the clockwise direction in the three-channel drive mode, andFIG.20Dis a view for explaining rotation of the OIS moving unit in the counterclockwise direction in the three-channel drive mode. In an example, in the three-channel drive mode, the second coil unit230-2and the fourth coil unit230-4may be connected in series to each other, a drive signal may be supplied to each of the first and third coil units230-1and230-3, and no drive signal may be supplied to the second or fourth coil unit230-2or230-4.

Referring toFIGS.20C and20D, the OIS moving unit may be tilted relative to the optical axis, or may be rotated or rolled about the optical axis by fifth electromagnetic force Fr1or Fr3, which is generated by interaction between the first coil unit230-1and the first magnet unit130-1, and sixth electromagnetic force Fr2or Fr4, which is generated by interaction between the third coil unit230-3and the third magnet unit130-3. In an example, the direction of the fifth electromagnetic force Fr1and the direction of the sixth electromagnetic force Fr2may be opposite each other.

FIG.20Eis a view for explaining rotation of the OIS moving unit in the clockwise direction in the four-channel drive mode, andFIG.20Fis a view for explaining rotation of the OIS moving unit in the counterclockwise direction in the four-channel drive mode.

Referring toFIGS.20E and20F, the OIS moving unit may be tilted relative to the optical axis, or may be rotated or rolled about the optical axis by first electromagnetic force FR1or FL1, which is generated by interaction between the first coil unit230-1and the first magnet unit130-1, second electromagnetic force FR2or FL2, which is generated by interaction between the second coil unit230-2and the second magnet unit130-2, third electromagnetic force FR3or FL3, which is generated by interaction between the third coil unit230-3and the third magnet unit130-3, and fourth electromagnetic force FR4or FL4, which is generated by interaction between the fourth coil unit230-4and the fourth magnet unit130-4. In an example, the direction of the first electromagnetic force FR1or FL1and the direction of the third electromagnetic force FR3or FL3may be opposite each other. In addition, in an example, the direction of the second electromagnetic force FR2or FL2and the direction of the fourth electromagnetic force FR4or FL4may be opposite each other. In addition, in an example, the direction of the first electromagnetic force FR1or FL1and the direction of the second electromagnetic force FR2or FL2may be perpendicular to each other.

Compared to the three-channel drive mode shown inFIGS.20C and20D, according to the four-channel drive mode shown inFIGS.20E and20F, the electromagnetic force for rotating the OIS moving unit may be increased, and accordingly, the amount of drive current required to drive the first to fourth coil units230-1to230-4may be reduced. As a result, the amount of power that is consumed may be reduced.

The second position sensor240may be disposed on, coupled to, or mounted on the first surface60A (e.g. the upper surface) of the first circuit board250. The second position sensor240may detect displacement of the OIS moving unit in a direction perpendicular to the optical-axis direction, for example, shift or movement of the OIS moving unit in a direction perpendicular to the optical-axis direction. In addition, the second position sensor240may detect tilting of the OIS moving unit relative to the optical axis or rotation or rolling of the OIS moving unit about the optical axis within a predetermined range. The first position sensor170may alternatively be referred to as an “AF position sensor”, and the second position sensor240may alternatively be referred to as an “OIS position sensor”. The second position sensor240may include three or more sensors corresponding to or overlapping three or more magnet units, among the four magnet units, in the optical-axis direction in order to detect movement of the OIS moving unit.

In an example, the second position sensor240may be disposed below the second coil230.

In an example, the second position sensor240may not overlap the second coil230in a direction perpendicular to the optical axis. In an example, the sensing element of the second position sensor240may not overlap the second coil230in a direction perpendicular to the optical axis. The sensing element may be a portion that detects a magnetic field.

In an example, the center of the second position sensor240may not overlap the second coil230in a direction perpendicular to the optical axis. In an example, the center of the second position sensor240may be a spatial center in the x-axis direction and the y-axis direction in an xy-coordinate plane perpendicular to the optical axis. Alternatively, the center of the second position sensor240may be a spatial center in the x-axis, y-axis, and z-axis directions.

In another embodiment, at least a portion of the second position sensor240may overlap the second coil230in a direction perpendicular to the optical axis.

In an example, the second position sensor240may overlap the holes41A to41C in the holder270in the optical-axis direction. In addition, in an example, the second position sensor240may overlap the cavity in the second coil230in the optical-axis direction. In addition, in an example, at least some of the holes41A to41C in the holder270may overlap the cavity in the second coil230in the optical-axis direction.

In an example, at least a portion of the second position sensor240, for example the center of the second position sensor240, may not overlap the second coil230in the optical-axis direction.

In an example, the second position sensor240may include a first sensor240A, a second sensor240B, and a third sensor240C, which are spaced apart from one another.

Each of the first to third sensors240A,240B, and240C may be, for example, a Hall sensor. In another embodiment, each of the first to third sensors240A,240B, and240C may be a driver IC including a Hall sensor and a driver. The description of the first position sensor170may also apply to the first to third sensors240A,240B, and240C. Each of the first to third sensors240A,240B, and240C may be, for example, a displacement detection sensor, the output voltage of which varies depending on the positional relationship with a magnet unit corresponding thereto.

Each of the first sensor240, the second sensor240B, and the third sensor240C may be conductively connected to the first circuit board250.

The second position sensor240may be disposed below the cavity in the second coil230. The second position sensor240may not overlap the second coil230in a direction perpendicular to the optical-axis direction. In an example, the second position sensor240may overlap the holder270in a direction perpendicular to the optical-axis direction.

In an example, the first sensor240A may be disposed below the cavity in the first coil unit230-1corresponding thereto. The first sensor240A may be disposed in a corresponding hole41A among the holes41A to41C in the holder270. The second sensor240B may be disposed below the cavity in the second coil unit230-2. The second sensor240B may be disposed in a corresponding hole41B, among the holes41A to41C in the holder270. The third sensor240C may be disposed below the cavity in the third coil unit230-3. The third sensor240C may be disposed in a corresponding hole41C among the holes41A to41C in the holder270.

In an example, each of the first to third sensors240A,240B, and240C may not overlap a corresponding one of the coil units230-1to230-3in a direction perpendicular to the optical axis. The first to third sensors240A,240B, and240C may overlap the holder270in a direction perpendicular to the optical axis.

Since the first to third sensors240A,240B, and240C are disposed so as not to overlap the OIS coil230in a direction perpendicular to the optical axis, the influence of the magnetic field of the OIS coil230on the output of the OIS position sensor240may be reduced, and accordingly, it is possible to accurately perform OIS feedback operation and to ensure the reliability of OIS operation.

The second position sensor240may face, correspond to, or overlap the magnet130in the optical-axis direction.

In an example, at the initial position of the OIS moving unit, at least a portion of the first sensor240A may overlap the first magnet unit130-1in the optical-axis direction. The first sensor240A may output a first output signal (e.g. first output voltage) corresponding to the result of detection of the magnetic field of the first magnet unit130-1.

In an example, at the initial position of the OIS moving unit, at least a portion of the second sensor240B may overlap the second magnet unit130-2in the optical-axis direction. The second sensor240B may output a second output signal (e.g. a second output voltage) corresponding to the result of detection of the magnetic field of the second magnet unit130-2.

In an example, at the initial position of the OIS moving unit, at least a portion of the third sensor240C may overlap the third magnet unit130-3in the optical-axis direction. The third sensor240C may output a third output signal (e.g. a third output voltage) corresponding to the result of detection of the magnetic field of the third magnet unit130-3.

The initial position of the OIS moving unit may be the original position of the OIS moving unit in the state in which no power or drive signal is applied to the second coil230from the controller820or780or the position at which the OIS moving unit is located as the result of the support board being elastically deformed due only to the weight of the OIS moving unit. In addition, the initial position of the OIS moving unit may be the position at which the OIS moving unit is located when gravity acts in the direction from the first board unit255toward the second board unit800or when gravity acts in the opposite direction. In addition, the initial position of the OIS moving unit may be the position at which the OIS moving unit is located without being moved in the state in which no power or drive signal is supplied to the second coil230by the controller820or780.

In order to improve the linearity of the relationship between the displacement of the OIS moving unit and the output from the second position sensor250, each of the sensor units240A,240B, and240C may overlap a corresponding one of the magnet units130-1,130-2, and130-3within the stroke range of the OIS moving unit in the optical-axis direction.

In an example, rolling of the OIS moving unit may be controlled using at least one of the first output voltage from the first sensor240A, the second output voltage from the second sensor240B, or the third output voltage from the third sensor240C. In an example, the controller830or780may control rolling of the OIS moving unit using the first output voltage and the third output voltage.

In an example, the controller830or780may control movement or displacement of the OIS moving unit in the first horizontal direction (e.g. the y-axis direction) or the second horizontal direction (e.g. the x-axis direction) using at least one of the first to third output voltages. In an example, the controller830or780may control movement or displacement of the OIS moving unit in the first horizontal direction using the first output voltage from the first sensor240A, and may control movement or displacement of the OIS moving unit in the second horizontal direction using the second output voltage from the second sensor240B.

Each of the first to third sensors240A,240B, and240C may be a Hall sensor or a driver IC including a Hall sensor. In another embodiment, each of the first and second sensors240A and240B may be a Hall sensor, and the third sensor240C may be a tunnel magnetoresistance (TMR) sensor. In this case, the tunnel magnetoresistance (TMR) sensor may be a TMR magnetic angle sensor.

In still another embodiment, each of the first to third sensors240A,240B, and240C may be a tunnel magnetoresistance (TMR) sensor. In this case, the TMR sensor may be a TMR linear magnetic field sensor having a linear output corresponding to the displacement (or the stroke) of the OIS moving unit.

The base210may be disposed under the first board unit255. The base210may have a polygonal shape, for example, a quadrangular shape, which coincides with or corresponds to the shape of the cover member300or the first board unit255.

In an example, the base210may include a lower plate21A and a side plate21B protruding from the edge of the lower plate21A. The lower plate21A may correspond to or face the first region801of the second board unit800, and the side plate21B may protrude or extend from the lower plate21A toward the side plates302of the cover member300. In an example, the base210may have a bore210A formed in the lower plate21A thereof. The bore210A in the base210may be a through-hole formed through the base210in the optical-axis direction. In another embodiment, the base may not have a bore.

In an example, the side plate21B of the base210may be coupled to the side plate302of the cover member300. The base210may include a stair211(refer toFIG.18A), to which an adhesive is applied in order to be bonded to the side plate302of the cover member300. In this case, the stair211may guide the side plate302of the cover member300to be coupled to the upper side thereof. The stair211of the base210and the side plate302of the cover member300may be bonded and fixed to each other by means of an adhesive or the like.

The base210may include one or more protruding portions216A to216D, which protrude from the lower plate21A. In an example, the one or more protruding portions216A to216D may protrude from the side plate21B of the base210.

In an example, the side plate21B of the base210may include four side plates, and each of the protruding portions216A to216D may be formed on a respective one of the four side plates. In an example, each of the protruding portions216A to216D may be disposed or located on the center of a respective one of the four side plates.

The second board unit800may be disposed under the base210. In an example, the second board unit800may be disposed under the lower plate21A of the base210. The second board unit800may be coupled to the base210. In an example, the second board unit800may be coupled to the lower plate21A of the base210. In an example, the second board unit800may be coupled to the lower surface of the lower plate21A of the base210.

The second board unit800may serve to supply a signal from the outside to the image sensor unit350or to output a signal from the image sensor unit350to the outside.

The second board unit800may include a first region (or a first board)801corresponding to the AF moving unit100or the image sensor810, a second region (or a second board)802disposed on the connector804, and a third region (or a third board)803interconnecting the first region801and the second region802. The connector804may be provided with ports in order to be conductively connected to the second region802of the second board unit800and to be conductively connected to an external device (e.g. the optical instrument200A). The bore210A in the base210may be closed or blocked by the first region801of the second board unit800.

Each of the first region801and the second region802of the second board unit800may include a rigid substrate, and the third region803may include a flexible substrate. In addition, each of the first region801and the second region802may further include a flexible substrate.

In another embodiment, at least one of the first to third regions801to803of the second board unit800may include at least one of a rigid substrate or a flexible substrate.

The second board unit800may be disposed behind the first board unit255. In an example, the first board unit255may be disposed between the AF moving unit100and the second board unit800.

When viewed from above, the first region801of the second board unit800may have a polygonal shape (e.g. a quadrangular shape, a square shape, or a rectangular shape), but the disclosure is not limited thereto. In another embodiment, the first region801of the second board unit800may have a circular shape.

The second board unit800may include a plurality of terminals800B corresponding to the terminals311of the support board220.

Referring toFIG.10A, the plurality of terminals800B may be formed in the first region801of the second board unit800. In an example, the second board unit800may include first terminals, which are disposed or arranged on one side of the first region801so as to be spaced apart from each other in the third direction (e.g. the y-axis direction), and second terminals, which are disposed or arranged on the opposite side of the first region801so as to be spaced apart from each other in the third direction (e.g. the y-axis direction).

In an example, the plurality of terminals800B may be formed on a first surface801A of the second board unit800(e.g. the first region801), which faces the first board unit255.

The second board unit800may have at least one coupling hole800C formed therein for coupling to a coupling protrusion45B of the base210. The coupling hole800C may be a through-hole formed through the second board unit800in the optical-axis direction. In another embodiment, the coupling hole may take the form of a recess.

In an example, the coupling protrusion45B may protrude from the lower surface of the base210. In an example, the coupling protrusion45B of the base210may be formed on each of the corners of the lower surface of the base210, which face each other in an oblique direction. In addition, the coupling hole800C may be formed in each of the corners of the second board unit800, which face each other in an oblique direction. In another embodiment, the coupling hole in the second board unit800may be disposed adjacent to at least one of the sides or the corners of the first region801.

The second board unit800may have formed therein a bore800A corresponding to the bore210A in the base210. The bore800A may be a through-hole or a cavity formed through the second board unit800, for example the first region801, in the optical-axis direction. In another embodiment, the second board unit may not have the bore800A. The bore800A may have a shape corresponding to the shape of the bore210A in the base210, for example, a quadrangular shape. The bore800A may have a size (e.g. a first area) larger than or equal to the size (e.g. a second area) of the bore210A in the base210. In another embodiment, the first area may be smaller than the second area.

Referring toFIG.13B, when viewed from above or in the optical-axis direction, the bore800A in the second board unit800may have a size (e.g. an area) larger than the size (or the area) of the lower surface of the first board unit255.

In an example, when viewed from above or in the optical-axis direction, the first board unit255and the first heat dissipation member370may be located in the bore800A in the second board unit800.

Referring toFIG.13, the second heat dissipation member380may be disposed on the second board unit800(e.g. the first region801). In an example, the second heat dissipation member380may be disposed under or behind the second board unit800. In an example, the second heat dissipation member380may be disposed on a second surface801B of the second board unit800.

In an example, the second heat dissipation member380may be attached, coupled, or secured to the second surface801B of the second board unit800. The second heat dissipation member380may close or seal the bore800A in the second board unit800. In an example, the edge of the second heat dissipation member380may be attached, coupled, or secured to the second surface801B of the second board unit800.

In an example, the second heat dissipation member380may be embodied as a plate-type member having a predetermined thickness and hardness. In addition, the second heat dissipation member380may receive heat from the first board unit255to dissipate the heat outside, thereby improving the heat dissipation effect.

In an example, the second heat dissipation member380may include a metal material having high thermal conductivity and high heat dissipation efficiency, for example, at least one of SUS, aluminum, nickel, bronze, phosphorus, or copper.

In an example, the first heat dissipation member370and the second heat dissipation member380may be formed of the same material. In another embodiment, the first heat dissipation member370and the second heat dissipation member380may be formed of different materials. In an example, the second heat dissipation member380may have the same thermal conductivity as the first heat dissipation member370or thermal conductivity similar thereto. The description of the material and thermal conductivity of the first and second heat dissipation members370and380may also apply to first and second heat dissipation members according to other embodiments to be described later.

In addition, the second heat dissipation member380may serve as a reinforcement member for stably supporting the second board unit800and inhibiting the second board unit800from being damaged by external impacts or contact.

In another embodiment, the second heat dissipation member380may be formed of a thermally conductive material having high thermal conductivity, for example, thermally conductive epoxy, thermally conductive plastic, or thermally conductive synthetic resin.

The second heat dissipation member380may include at least one groove383or at least one uneven portion in order to improve the heat dissipation effect. In an example, the groove383or the uneven portion may be formed in a predetermined pattern in a second surface382of the second heat dissipation member380. The second surface382may be a surface formed opposite a first surface381of the second heat dissipation member380.

In another embodiment, a predetermined pattern of the second heat dissipation member380may be formed in at least one of the first surface381or the second surface382of the second heat dissipation member380.

In another embodiment, the second heat dissipation member may include a hole or a through-hole in place of the groove383. In another embodiment, the second heat dissipation member may include a plurality of through-holes. The description of the predetermined pattern of the first heat dissipation member370may also apply to the second heat dissipation member380.

The bore800A in the second board unit800may open or expose at least a portion of the second heat dissipation member380. In an example, the bore800A in the second board unit800may open or expose at least a portion of the first surface381(refer toFIG.10A) of the second heat dissipation member380.

In an example, the first surface381of the second heat dissipation member380that is exposed by the bore800A may correspond to, face, or overlap the second surface372of the first heat dissipation member370in the optical-axis direction. In this case, the second surface372of the first heat dissipation member370may be spaced apart from the first surface381of the second heat dissipation member380that is exposed by the bore800A.

The heat dissipated from the first heat dissipation member370may be transferred to the second heat dissipation member380through convection or radiation, and the transferred heat may be dissipated outside through the second heat dissipation member380. Since the first surface381of the second heat dissipation member380and the second surface372of the first heat dissipation member370are disposed so as to face each other in the optical-axis direction, heat may be smoothly transferred from the first heat dissipation member370to the second heat dissipation member380.

Referring toFIGS.10A and10B, when viewed from above or in the optical-axis direction, the area of the second heat dissipation member380may be larger than the area of the first heat dissipation member370. In an example, the area of the first surface381(or the second surface382) of the second heat dissipation member380may be larger than the area of the first surface371(or the second surface372) of the first heat dissipation member370. Accordingly, heat may be smoothly transferred from the first heat dissipation member370to the second heat dissipation member380, and consequently, the heat dissipation effect may be improved.

The support board310may conductively connect the first board unit255to the second board unit800. The support board310may alternatively be referred to as a “support member”, a “connection board”, or a “connection part”. Alternatively, the support board310may be referred to as an “interposer”.

The support board310may include a flexible substrate, or may be embodied as a flexible substrate. In an example, the support board310may include a flexible printed circuit board (FPCB). At least a portion of the support board310may be flexible. The first circuit board250and the support board310may be connected to each other.

In an example, the support board310may include a connection portion320, which is connected to the first circuit board250. In an example, the first circuit board250and the support board310may be integrally formed with each other. In another embodiment, the first circuit board250and the support board310may be provided separately from each other, rather than being integrated, and may be connected to each other via the connection portion320. In an example, the first circuit board250and the support board310may be conductively connected to each other. In another embodiment, the connection portion320may be integrally formed with at least one of the support board310or the first circuit board250.

In addition, the support board310may be conductively connected to the first circuit board250. The support board310may be conductively connected to the second board unit800.

The support board310may support the OIS moving unit with respect to the fixed unit. In addition, the support board310may guide movement of the OIS moving unit. The support board310may guide the OIS moving unit to move in a direction perpendicular to the optical-axis direction. The support board310may guide the OIS moving unit to rotate about the optical axis. The support board310may restrict movement of the OIS moving unit in the optical-axis direction.

A portion of the support board310may be connected to the first circuit board250, which is the OIS moving unit. Another portion of the support board310may be coupled to the base210, which is the fixed unit. In an example, the connection portion320of the support board310may be coupled to the first circuit board250. In addition, bodies86and87of the support board310may be coupled to protruding portions216C and216D of the base210, and terminal units7A,7B,8A, and8B of the support board310may be coupled to the second board unit800.

Referring toFIGS.15to18B, the support board310may include an elastic unit310A and a circuit member310B.

The elastic unit310A serves to elastically support the OIS moving unit. The elastic unit310A may be embodied as an elastic body, for example a spring. The elastic unit310A may include metal, or may be made of an elastic material.

FIG.16illustrates embodiments of the elastic unit310A.

The elastic unit310A1shown inFIG.16(a)may include a planar portion371A and an uneven portion371B. The planar portion371A may be provided in a plural number, and the uneven portion371B may be formed between two planar portions. In an example, the uneven portion371B may include at least one of a first bump371B1and a second bump371B2. In an example, the first bump371B1and the second bump371B2may be formed to be symmetrical with each other in the vertical direction.

The elastic unit310A2shown inFIG.16(b)may include a planar portion372A and an uneven portion372B. The planar portion372A may be provided in a plural number, and the uneven portion372B may be formed between two planar portions372A. For example, the uneven portion372B may take the form of a sinusoidal curve, sawteeth, or a zigzag.

The elastic unit310A3shown inFIG.16(c)may include a first planar portion373A and a second planar portion373B. The length of the first planar portion373A in the first direction (or the optical-axis direction) may be different from the length of the second planar portion373B in the first direction (or the optical-axis direction). In an example, the former may be longer than the latter. The first planar portion373A may be provided in a plural number, and the second planar portion373B may be provided in a plural number. In an example, the first planar portion373A and the second planar portion373B may be formed to be uneven with respect to each other.

The elastic unit310A4shown inFIG.16(d)may include a first planar portion373A, a second planar portion373B, and a protruding portion (or an extension portion) protruding or extending from the first planar portion373A.

In another embodiment, only corner portions of each of the elastic units shown inFIGS.16(a) to16(d)may be included.

The elastic unit310A may include at least one of the elastic units310A1to310A4shown inFIGS.16(a) to16(d).

The circuit member310B may be conductively connected to the first circuit board250and the second board unit800. The circuit member310B may be embodied as a flexible substrate, or may include at least one of a flexible substrate or a rigid substrate. The circuit member310B may be, for example, an FPCB.

The elastic unit310A may be coupled to the circuit member310B, and may serve to increase the strength of the circuit member310B. Referring toFIGS.15and17, the elastic unit310A may be disposed outside the circuit member310B, and the outer side surface of the circuit member310B may be coupled to the inner side surface of the elastic unit310A. In another embodiment, the circuit member may be disposed outside the elastic unit.

The support board310may be connected to the first board unit255(e.g. the first circuit board250), and may include one or more connection portions320A and320B, which are conductively connected to the first board unit255(e.g. the first circuit board250). In addition, the support board310may be connected to the second board unit800, and may include one or more terminal units7A,7B,8A, and8B, which are conductively connected to the second board unit800. Each of the terminals7A,7B,8A, and8B may include a plurality of terminals311.

Referring toFIGS.15and17, the support board310may include a first support board310-1and a second support board310-2, which are spaced apart from each other. The first support board310-1and the second support board310-2may be formed to be bilaterally symmetrical with each other. In another embodiment, the first support board310-1and the second support board310-2may be integrated into a single board.

As shown inFIG.17, the first support board310-1and the second support board310-2may be disposed on respective sides of the first circuit board250. In an example, the first support board310-1may include a first body86and one or more terminal units7A and7B extending from the first body86. Each of the terminal units7A and7B of the first support board310-1may include a plurality of terminals311.

The second support board310-2may include a second body87and one or more terminal units8A and8B extending from the second body87. Each of the terminals units8A and8B of the second support board310-2may include a plurality of terminals311.

The first circuit board250may include a first side portion33A and a second side portion33B, which are located opposite each other, and may further include a third side portion33C and a fourth side portion33D, which are located between the first side portion33A and the second side portion33B and are located opposite each other.

The first body86may include a first portion6A, which corresponds to or faces the first side portion33A of the first circuit board250, a second portion6B, which corresponds to a portion (or one side) of the third side portion33C of the first circuit board250, and a third portion6C, which corresponds to a portion (or one side) of the fourth side portion33D of the first circuit board250. In addition, the first body86may include a first bent portion6D, which interconnects the first portion6A and the second portion6B and is bent from one end of the first portion6A, and a second bent portion6E, which interconnects the first portion6A and the third portion6C and is bent from the other end of the first portion6A.

The first support board310-1may include a first terminal unit7A, which extends or protrudes from the second portion6B of the first body86toward the second board unit800, and a second terminal unit7B, which extends or protrudes from the third portion6C of the first body86toward the second board unit800. The second terminal unit7B may be located opposite the first terminal unit7A.

The first support board310-1may include a first connection portion320A, which interconnects the first portion6A of the first body86and the first side portion33A of the first circuit board250. The first connection portion320A may include a bent portion.

The second body87may include a first portion9A, which corresponds to or faces the second side portion33B of the first circuit board250, a second portion9B, which corresponds to another portion (or opposite side) of the third side portion33C of the first circuit board250, and a third portion9C, which corresponds to another portion (or opposite side) of the fourth side portion33D of the first circuit board250. In addition, the second body87may include a first bent portion9D, which interconnects the first portion9A and the second portion9B and is bent from one end of the first portion9A, and a second bent portion9E, which interconnects the first portion9A and the third portion9C and is bent from the other end of the first portion9A.

The second support board310-2may include a third terminal unit8A, which extends or protrudes from the second portion9B of the second body87toward the second board unit800, and a fourth terminal unit8B, which extends or protrudes from the third portion9C of the second body87toward the second board unit800. The fourth terminal unit8B may be located opposite the third terminal unit8A.

The second support board310-2may include a second connection portion320B, which interconnects the first portion9A of the second body87and the second side portion33B of the first circuit board250. The second connection portion320B may include a bent portion.

In addition, the first support board310-1may include a first flexible board31A, which conductively connects the first board unit255(e.g. the first circuit board250) to the second board unit800, and a first elastic member30A, which is coupled to the first flexible board31A.

The second support board310-2may include a second flexible board31B, which conductively connects the first board unit255(e.g. the first circuit board250) to the second board unit800, and a second elastic member30B, which is coupled to the second flexible board31B.

Although the support board310is illustrated inFIGS.18A and18Bas including two support boards310-1and310-2, the disclosure is not limited thereto. In another embodiment, the support board310may be configured such that two support boards are integrated into a single board. In still another embodiment, the support board310may include three or more support boards.

The terminal unit (e.g.8B) of the support board310may be provided with terminals P1to P4in order to be conductively connected to the terminals B1to B4of the terminal unit95of the circuit board190of the AF moving unit100. The terminals B1to B4of the terminal unit95of the circuit board190and the terminals P1to P4of the terminal unit8B of the support board310may be conductively connected to each other by means of solder or a conductive adhesive. That is, the circuit board190of the AF moving unit100may be conductively connected to the second board unit800via the support board310.

Referring toFIG.17, the circuit member310B of the support board310may include a first insulating layer29A, a second insulating layer29B, and a conductive layer29C formed between the first insulating layer29A and the second insulating layer29B. The conductive layer29C may be a wiring layer for transmitting an electrical signal. In an example, the second layer29B may be located outside the first layer29A.

Each of the first and second insulating layers29A and29B may be formed of an insulating material, such as polyimide, and the conductive layer29C may be formed of a conductive material, such as copper, gold, or aluminum, or may be formed of an alloy including copper, gold, or aluminum.

The elastic unit310A may be disposed on the second layer29B. The elastic unit310A may include at least one of copper, titanium, or nickel, or may be formed of an alloy including at least one of copper, titanium, or nickel in order to serve as a spring. In an example, the elastic unit310A may be formed of an alloy of copper and titanium or an alloy of copper and nickel.

The elastic unit310A may be conductively connected to the ground of the first board unit255or the ground of the second board unit800. The elastic unit310A may be used for impedance matching of transmission lines (or wires) of the board units255,310, and800, and may reduce loss of transmission signals through impedance matching to reduce the influence of noise. In an example, the matching impedance may be 40 ohms to 600 ohms. In another example, the matching impedance may be 50 ohms.

In an example, an EMI member (e.g. a sheet of EMI tape) or a conductive member (e.g. a sheet of conductive tape) may be used for impedance matching.

The support board310may include a metal member or a conductive member formed on the outer surface thereof. For example, the metal member may be an EMI member (e.g. a sheet of EMI tape) or a conductive member (e.g. a sheet of conductive tape).

In an example, the EMI member or the conductive member may be disposed on or attached to at least one of the elastic unit310A or the circuit member310B.

The support board310may further include a protective member or an insulating member for enveloping or covering the elastic unit310A.

In an example, the thickness T11of the conductive layer29C between the first layer29A and the second layer29C may be 7 micrometers to 50 micrometers. In another embodiment, the thickness T11may be 15 micrometers to 30 micrometers.

In addition, in an example, the thickness T12of the elastic unit310A may be 20 micrometers to 150 micrometers. In another embodiment, the thickness T12may be 30 micrometers to 100 micrometers. In an example, the thickness T12of the elastic unit310A may be larger than the thickness T11of the conductive layer29C. In another embodiment, T12may be equal to or smaller than T11.

Referring toFIGS.14B,15,17,18A, and18B, the holder270may include first to fourth side portions corresponding to the first to fourth side portions33A to33D of the first circuit board250.

At least a portion of the support board310may be attached or coupled to the holder270. In an example, at least one of the connection portions320A and320B of the support board310may be coupled to at least one of the first to fourth side portions of the holder270by means of an adhesive. In an example, the first connection portion320A may be coupled to the first side portion of the holder270by means of an adhesive, and the second connection portion320B may be coupled to the second side portion of the holder270by means of an adhesive.

The first to fourth side portions of the holder270may be provided with protruding portions4A to4D. In an example, the first connection portion320A and the first protruding portion4A formed on the first side portion of the holder270may form a first coupling region38A (refer toFIG.18A), in which the first connection portion320A and the first protruding portion4A are coupled to each other. The second connection portion320A and the second protruding portion4B formed on the second side portion of the holder270may form a second coupling region38B (refer toFIG.18A), in which the second connection portion320A and the second protruding portion4B are coupled to each other.

In addition, the base210may include first to fourth side portions corresponding to the first to fourth side portions33A to33D of the first circuit board250. In an example, the side plate21B of the base210may include the first to fourth side portions of the base210. The first to fourth side portions of the base210may be provided with protruding portions216A to216D.

At least a portion of the support board310may be coupled to the base210. In an example, the bodies86and87of the support board310may be coupled to the base210by means of an adhesive. In an example, a portion of each of the bodies86and87of the support board310, which are connected to the terminal units7A,7B,8A, and8B, may be coupled to the base210.

In an example, the first terminal unit7A and/or the second portion6B of the first support board310-1may be coupled to one region of the third side portion (or the third protruding portion216C) of the base210, and the second terminal unit7B and/or the third portion6C of the first support board310-1may be coupled to one region of the fourth side portion (or the fourth protruding portion216D) of the base210.

In an example, the third terminal unit8A and the second portion9B of the second support board310-2may be coupled to another region of the third side portion (or the third protruding portion216C) of the base210, and the fourth terminal unit8B and the third portion9C of the second support board310-2may be coupled to another region of the fourth side portion (or the fourth protruding portion216D) of the base210.

A third coupling region39A (refer toFIG.18A) may be formed between the first and third terminal units7A and8A of the support board310and the third side portion (or the third protruding portion216C) of the base210, and a fourth coupling region39B (refer toFIG.18A) may be formed between the second and fourth terminal units7B and8B of the support board310and the fourth side portion (or the fourth protruding portion216D) of the base210. The OIS moving unit may be elastically supported with respect to the fixed unit by the support board310and the first to fourth coupling regions38A,38B,39A, and39B. The terminals311of the support board310may be coupled to the terminals of the second board unit800by means of solder or a conductive adhesive, and may be conductively connected thereto.

Referring toFIGS.18A and18B, a portion of the support board310may be coupled to the outer side surface of the base210(or the protruding portions216A to216D). In another embodiment, a portion of the support board310may be coupled to the inner side surface of the base210(or the protruding portions216A to216D).

In another embodiment, the support member may be an elastic member including no substrate, for example, a spring, a wire, a shape memory alloy, or a ball member. In an example, in the case in which the support member is a wire, a plurality of wires may be disposed on at least one of the corners or the side portions of the base210or the second board unit800, and may interconnect the first board unit255(e.g. the second circuit board260) and the second board unit800(or the base210). In an example, one end of each of the plurality of wires may be coupled to the first board unit255(e.g. the second circuit board260), and the other end of each of the plurality of wires may be coupled to the second board unit800(or the base210).

The elastic member315may elastically support the first board unit255with respect to the base210. In an example, one end of the elastic member315may be coupled to the first board unit255, and the other end of the elastic member315may be coupled to the fixed unit, for example, the base210.

Referring toFIGS.18A,18B, and19, the elastic member315may include a first coupling portion315A, which is coupled to the first circuit board250of the first board unit255, a second coupling portion315B, which is coupled to the base210, and a connection portion315C, which interconnects the first coupling portion315A and the second coupling portion315B.

In an example, the first coupling portion315A may be coupled to at least a portion of the lower surface of the first circuit board250. Alternatively, the first coupling portion315A may be coupled to at least a portion of the lower surface of the holder270. In an example, the first coupling portion315A may be coupled to at least one of the lower surface of the first circuit board250or the lower surface of the holder270by means of an adhesive.

In an example, the second coupling portion315B may be coupled to at least a portion of the upper surface of the base210. In an example, the base210may be provided on the upper surface thereof with at least one protrusion210-1(refer toFIG.18A), and the second coupling portion315B may have a hole315-1formed therein for coupling to the at least one protrusion210-1of the base210. The protrusion210-1may be formed on a corner of the upper surface of the base210, and the hole315-1may be formed in a corner of the second coupling portion315B.

In an example, when viewed in the first direction or from below, each of the first coupling portion315A and the second coupling portion315B may have a polygonal shape, such as a quadrangular shape, and may take the form of a closed curve. In an example, when viewed in the first direction or from below, the shape of the first coupling portion315A may be a quadrangular ring shape.

In an example, when viewed in the first direction or from below, the first coupling portion315A may be disposed inside the second coupling portion315B. Each of the first coupling portion315A and the second coupling portion315B may take the form of a plate.

The connection portion315C may include at least one of at least one linear portion or at least one bent portion. In an example, the connection portion315C may take the form of a wire. In another embodiment, the connection portion315C may take the form of a plate.

The connection portion316C may include a plurality of connection portions or connection lines, which are spaced apart from each other. Each of the plurality of connection portions (or connection lines) may include at least one of at least one linear portion or at least one bent portion. For example, the connection portion316C may extend in a direction perpendicular to the optical axis.

The image sensor unit350may include at least one of a motion sensor820, a controller830, a memory512, or a capacitor514.

The motion sensor820, the controller830, and the memory512may be disposed on any one of the first board unit255and the second board unit800. The capacitor514may be disposed on at least one of the first board unit255or the second board unit800.

In an example, the motion sensor820and the memory512may be disposed on the second board unit800(e.g. the first region801). In an example, the controller830may be disposed or mounted on the first circuit board250of the first board unit255.

In another embodiment, the controller830may be disposed on the second board unit800. Because the heat generated from the image sensor810may cause malfunction or errors of the controller830, it may be preferable for the controller830to be located far away from the image sensor810.

The motion sensor820may be conductively connected to the controller830via wirings or circuit patterns formed on the first board unit255and the second board unit800. The motion sensor820may output rotational angular speed information regarding the movement of the camera device10. The motion sensor820may be embodied as a two-axis or three-axis gyro sensor or an angular speed sensor. In an example, the motion sensor820may output information about the movement amount in the x-axis direction, the movement amount in the y-axis direction, and the rotation amount in response to movement of the camera device10.

In another embodiment, the motion sensor820may be omitted from the camera device10, or may be disposed in another region of the second board unit800. In the case in which the motion sensor820is omitted from the camera device, the camera device10may receive position information from a motion sensor provided in the optical instrument200A in response to movement of the camera device10.

The memory512may store a first data value (or a code value) corresponding to the output from the second position sensor240according to displacement (or stroke) of the OIS moving unit in the second direction (e.g. the x-axis direction) in order to implement OIS feedback operation.

In addition, the memory512may store a second data value (or a code value) corresponding to the output from the first position sensor170according to displacement (or stroke) of the bobbin110in the first direction (e.g. the optical-axis direction or the z-axis direction) in order to implement OIS feedback operation.

In an example, each of the first and second data values may be stored in the memory512in the form of a look-up table. Alternatively, each of the first and second data values may be stored in the memory512in the form of an equation or an algorithm. In addition, the memory512may store an equation, an algorithm, or a program for operation of the controller830. In an example, the memory512may be a non-volatile memory, for example, an electrically erasable programmable read-only memory (EEPROM).

The controller830may be conductively connected to the first position sensor170and the second position sensor240. The controller830may control a drive signal that is supplied to the second coil230using the output signals received from the sensors240A,240B, and240C of the second position sensor240and the first data value stored in the memory512, and may perform feedback OIS operation.

In addition, the controller830may control a drive signal that is supplied to the first coil120using the output signal from the first position sensor170and the second data value stored in the memory512, and may perform feedback auto-focusing operation.

The controller830may be embodied as a driver IC, but the disclosure is not limited thereto. In an example, the controller830may be conductively connected to the terminals251of the first circuit board250of the first board unit255.

The image sensor unit350may further include a filter610. In addition, the image sensor unit350may further include a filter holder600, in which the filter610is disposed, seated, or accommodated. The filter holder600may alternatively be referred to as a “sensor base”.

The filter610may serve to block or allow introduction of light within a specific wavelength range, among the light that has passed through the lens barrel400, into the image sensor810.

The filter610may be, for example, an infrared cut filter. In an example, the filter610may be disposed parallel to the xy-plane, which is perpendicular to the optical axis OA. The filter610may be disposed below the lens module400.

The filter holder600may be disposed below the AF moving unit100. In an example, the filter holder600may be disposed on the first board unit255. In an example, the filter holder600may be disposed on the first surface260A of the second circuit board260of the first board unit255.

The filter holder600may be coupled to one region of the second circuit board260around the image sensor810by means of an adhesive, and may be exposed through the bore250A in the first circuit board250. In an example, the filter holder600may be visible through the bore250A in the first circuit board250of the first board unit255. In an example, the bore250A in the first circuit board250may expose the filter holder600disposed on the second circuit board260and the filter610disposed on the filter holder600. In another embodiment, the filter holder may be coupled to the holder270or to the AF moving unit100.

The filter holder600may have a bore61A formed in a portion thereof, to which the filter610is mounted or on which the filter610is disposed, in order to allow the light passing through the filter610to be introduced into the image sensor810. The bore61A in the filter holder600may be a through-hole formed through the filter holder600in the optical-axis direction. In an example, the bore61A in the filter holder600may be formed through the center of the filter holder600, and may be disposed so as to correspond to or face the image sensor810.

The filter holder600may include a seating portion500, which is depressed from the upper surface thereof to allow the filter610to be seated thereon. The filter610may be disposed, seated, or mounted on the seating portion500. The seating portion500may be formed so as to surround the bore61A. In another embodiment, the seating portion of the filter holder may take the form of a protruding portion protruding from the upper surface of the filter.

The image sensor unit350may further include an adhesive disposed between the filter610and the seating portion500, and the filter610may be coupled or attached to the filter holder600by means of the adhesive.

The cover member300may take the form of a box that has an open lower portion and includes an upper plate301and side plates302. The lower portions of the side plates302of the cover member300may be coupled to the base210. The shape of the upper plate301of the cover member300may be a polygonal shape, for example, a quadrangular shape or an octagonal shape. The cover member300may have a bore303formed in the upper plate301thereof to expose the lens of the lens module400coupled to the bobbin110to external light.

Referring toFIGS.1and3, any one of the side plates302of the cover member300may have a recess portion304formed therein to expose the terminal95of the circuit board190and the terminal800B of the second board unit corresponding thereto.

The cover member300may include a protruding portion305extending from the upper plate301toward the groove119in the bobbin110. The protruding portion305may alternatively be referred to as an “extension portion”. In an example, the cover member300may include at least one protruding portion305extending from one region adjacent to the bore303formed in the upper plate301toward the upper surface of the bobbin110. The protruding portion305may be integrally formed with the upper plate301and the side plates302, and may be made of the same material as the upper plate301and the side plates302.

In an example, the cover member300may include four protruding portions corresponding to the four corners of the upper plate301. In another embodiment, the number of protruding portions305may be one or two or more.

In an example, the protruding portion305may take the form of a polygonal-shaped plate, for example, a quadrangular-shaped plate. In an example, at least part of the protruding portion305may include a curved portion.

At least part of the protruding portion305of the cover member300may be disposed in or inserted into the groove119in the bobbin110. In an example, one end or a distal end of the protruding portion305may be disposed in the groove119in the bobbin110. In an example, at the initial position of the bobbin110, the protruding portion305and the bottom surface of the groove119in the bobbin110may be spaced apart from each other.

When the bobbin110is moved in the optical-axis direction during AF operation, the protruding portion305of the cover member300may come into contact with the bottom surface of the groove119in the bobbin110. Accordingly, the protruding portion305may serve as a stopper restricting movement of the bobbin110in the upward direction within a predetermined range. In addition, since at least part of the protruding portion305is disposed in the groove119in the bobbin110, the protruding portion305may suppress or inhibit the bobbin110from rotating beyond a predetermined range about the optical axis due to an impact.

In an example, the cover member300may be formed of a metal material. For example, the cover member300A may be formed of steel use stainless (SUS) (e.g. a SUS-4-based material). In addition, the cover member300A may be formed of a steel plate cold commercial (SPC). For example, the cover member300A may be formed of a SUS material containing an iron (Fe) component in an amount of 50 percent (%) or more. In addition, in an example, an oxidation-resistant metal, for example nickel, may be plated on the surface of the cover member300A in order to inhibit oxidation. In addition, in another embodiment, the cover member300A may be formed of a magnetic material or a magnetic metal material.

In still another embodiment, the cover member300may be formed of an injection-molded material, for example, plastic or a resin material. In addition, the cover member300may be made of an insulating material or a material capable of blocking electromagnetic waves.

The cover member300and the base210may accommodate the AF moving unit100and the image sensor unit350, may protect the AF moving unit100and the image sensor unit350from external impacts, and may inhibit introduction of external foreign substances thereinto.

The OIS moving unit is movable relative to the fixed unit in a direction perpendicular to the optical axis OA. The OIS moving unit is spaced apart from the fixed unit by a predetermined distance. That is, the OIS moving unit may be suspended (flown) from the fixed unit by the support board310. The OIS moving unit may be moved relative to the fixed unit by the first electromagnetic force generated by the magnet130and the second coil230and the second electromagnetic force generated by the second magnet24and the second coil230.

In an example, at the initial position of the OIS moving unit, the outer surface of the holder270may be spaced apart from the inner surface of the base210by a predetermined distance. In addition, in an example, at the initial position of the OIS moving unit, the lower surfaces of the holder270and the first board unit255may be spaced apart from the base210by a predetermined distance.

In an example, the first to fourth coil units230-1to230-4of the second coil230may controlled by four channels. In this case, the four coil units230-1to230-4may be controlled in the state of being conductively separated from each other. In an example, any one of a forward direction current and a reverse direction current may be selectively applied to each of the coil units230-1to230-4. In this case, four pairs of lead wires, i.e. a total of eight lead wires, may be led out from the second coil230.

In another embodiment, the first to fourth coil units230-1to230-4of the second coil230may be controlled by three channels in order to implement OIS operation. In an example, the first to third coil units230-1to230-3may be conductively separated from each other, and the fourth coil unit230-4may be conductively connected in series to any one of the first to third coil units. In this case, three pairs of lead wires, i.e. a total of six lead wires, may be led out from the second coil230.

In an example, the second coil unit230-2and the fourth coil unit230-4may be connected in series to each other. The magnetization direction of the second magnet unit130-2, which corresponds to or faces the second coil unit230-2, and the magnetization direction of the fourth magnet unit120-4, which corresponds to or faces the fourth coil unit230-4, may be the same as each other. In an example, the magnetization direction of the first magnet unit130-1and the magnetization direction of the third magnet unit130-3may be the same as each other. In addition, in an example, the magnetization direction of the second magnet unit130-2may be different from the magnetization direction of the first magnet unit130-1. In an example, the magnetization direction of the second magnet unit130-2may be perpendicular to the magnetization direction of the first magnet unit130-1.

The controller830may supply at least one drive signal to at least one of the first to fourth coil units230-1to230-4, and may control the at least one drive signal to move the OIS moving unit in the x-axis direction and/or the y-axis direction or rotate the OIS moving unit within a predetermined angular range about the optical axis.

FIG.21is a block diagram of the controller830and the first to third sensors240A,240B, and240C. The controller830may perform communication of transmitting and receiving data to and from a host using a clock signal SCL and a data signal SDA, for example, I2C communication. In an example, the host may be the controller780of the optical instrument200A.

The controller830may be conductively connected to the second coil230. The controller830may include a driving unit510for supplying a drive signal required to drive the first to fourth coil units230-1to230-4. In an example, the driving unit510may include an H bridge circuit or an H bridge driver capable of changing the polarity of the drive signal. In this case, the drive signal may be a PWM signal in order to reduce consumption of current, and the drive frequency of the PWM signal may be 20 KHz or more, which is outside of the audible frequency band. In another embodiment, the drive signal may be a DC signal.

Each of the first to third sensors240A to240C may include two input terminals and two output terminals. The controller830may supply power or a drive signal to two input terminals of each of the first to third sensors240A to240C. In an example, any one of the two input terminals (a (+) input terminal and a (−) input terminal) of each of the first to third sensors240A to240C (e.g. a ground terminal or the (−) input terminal) may be commonly connected.

In an example, the controller830may receive a first output voltage from the first sensor240A, a second output voltage from the second sensor240B, and a third output voltage from the third sensor240C, and may control movement (or displacement) of the OIS moving unit in the x-axis direction or the y-axis direction using the received first to third output voltages.

In addition, the controller830may control rotation, tilting, and rolling of the OIS moving unit about the optical axis using the received first to third output voltages.

In addition, the controller830may include an analog-to-digital converter530, which receives output voltage from the two output terminals of each of the first to third sensors240A to240C and outputs a data value, a digital value, or a code value corresponding to the result of the analog-to-digital conversion of the received output voltage.

The controller830may control movement (or displacement) of the OIS moving unit in the x-axis direction or the y-axis direction and rotation, tilting, or rolling of the OIS moving unit about the optical axis using the data values output from the analog-to-digital converter530.

A temperature sensor540may measure the ambient temperature (e.g. the temperature of each of the first to third sensors240A,240B, and240C), and may output a temperature detection signal Ts corresponding to the result of the measurement. In an example, the temperature sensor540may be a thermistor.

The resistance value of a resistor included in the temperature sensor540may vary depending on changes in the ambient temperature, and accordingly, the value of the temperature detection signal Ts may vary depending on changes in the ambient temperature. An Equation or a look-up table relating to the relationship between the ambient temperature and the temperature detection signal Ts may be stored in the memory or the controller830or780through calibration.

Because the output values from the first to third sensors240A,240B, and240C are also affected by temperature, it is necessary to compensate for the output values from the first to third sensors240A,240B, and240C according to the ambient temperature in order to accurately and reliably implement OIS feedback operation.

To this end, in an example, the controller830or780may compensate for the output value (or the data value corresponding to output) from each of the first to third sensors240A,240B, and240C using the ambient temperature measured by the temperature sensor540and a temperature compensation algorithm or compensation equation. The temperature compensation algorithm or compensation equation may be stored in the controller830or780or the memory.

The camera device may further include a fourth sensor240D, which corresponds to or faces the fourth magnet unit130-4in the optical-axis direction. The fourth sensor240D may be disposed on the first board unit255(e.g. the first circuit board250). In an example, the fourth sensor240D may be disposed adjacent to any one corner of the first circuit board250, on which the first to third sensors are not disposed. In an example, the fourth sensor240D may be located so as to face the second sensor240B in an oblique direction. In an example, the output voltage from the fourth sensor240D may be used to detect movement of the OIS moving unit in the x-axis direction or the y-axis direction. In another embodiment, the fourth sensor240D may correspond to the first position sensor170of the AF moving unit100.

As the function and the performance of an optical instrument, e.g. a camera device mounted in a cellular phone, are improved, the size of a lens, the size of an image sensor, and the number of pixels are increased. Accordingly, the amount of current that is consumed to move the lens and the image sensor is increased, and the amount of heat that is generated from the camera device is increased due to the increase in the amount of current that is consumed. In general, a heat source of a camera device may be at least one of an image sensor, a driver IC (e.g. a position sensor or a controller), an AF driving coil, or an OIS driving coil.

Due to the increase in the size of the image sensor, the increase in the amount of current that is consumed, and the increase in the communication speed of the driver IC, the amount of heat that is generated from the image sensor, the drive coil, and the driver IC may be increased, and accordingly, the temperature of the camera device may rise. The increase in the amount of heat that is generated may increase noise of the image sensor, and consequently may deteriorate the resolution of the image sensor. In addition, the increase in the amount of heat that is generated may cause expansion of the lens, and accordingly, the effective focal length (EFL) of the lens may vary, leading to deterioration in the reliability of auto-focusing.

FIG.22is a schematic conceptual view of the lens module400, the second circuit board260, the image sensor810, the first heat dissipation member370, the second board unit800, and the second heat dissipation member380shown inFIG.4B.

Referring toFIG.22, the first heat dissipation member370, which is formed of a thermally conductive material having high thermal conductivity, is disposed on the second circuit board260of the first board unit255, and the image sensor810is directly disposed on, coupled to, mounted on, or attached to the first surface371of the first heat dissipation member370that is exposed through the bore262in the second circuit board260.

The thermal conductivity of the first heat dissipation member370may be higher than the thermal conductivity of the first board unit255, for example, the second circuit board260. The heat generated from the image sensor810may be effectively dissipated through the first heat dissipation member370, and thus the heat dissipation efficiency may be improved. Since the heat generated from the image sensor810is quickly dissipated outside through the first heat dissipation member370, it is possible to inhibit the temperature of the image sensor810from rising high. Accordingly, the embodiment may inhibit noise of the image sensor from being increased due to the increase in the amount of heat that is generated, and may inhibit deterioration in the resolution of the image sensor.

In addition, since the second heat dissipation member380having high thermal conductivity is disposed on, coupled to, or attached to the second board unit800, the embodiment may enable the heat transferred from the first heat dissipation member370to be smoothly dissipated and escape outside.

Since each of the first heat dissipation member370and the second heat dissipation member380include a groove, a hole, or an uneven portion373or383formed in a predetermined pattern, it is possible to increase the heat dissipation area, thus further improving the heat dissipation effect.

When viewed in a direction perpendicular to the optical axis, at least a portion of the first board unit255(and/or the first heat dissipation member370) may be disposed in the bore800A in the second board unit800. Accordingly, the gap G1between the first heat dissipation member370and the second heat dissipation member380may be reduced, and the heat dissipation effect may be improved. In another embodiment, when viewed in a direction perpendicular to the optical axis, the first board unit255(and/or the first heat dissipation member370) may be located outside the bore800A in the second board unit800, or may be located above the bore800A in the second board unit800.

In an example, at least a portion (e.g. the lower portion or the lower end) of the first board unit255(and/or the first heat dissipation member370) may overlap the inner circumferential surface of the second board unit800in a direction perpendicular to the optical axis. In this case, the inner circumferential surface of the second board unit800may be a surface formed by the bore800A.

Alternatively, in an example, the distance G1between the second heat dissipation member380and the first heat dissipation member370in the optical-axis direction may be shorter than the distance between the second heat dissipation member380and the first surface801A of the second board unit800. In another embodiment, the distance G1may be equal to or longer than the distance between the second heat dissipation member380and the first surface801A of the second board unit800.

The spacing distance (or the gap) G1between the first board unit255and the second board unit800in the optical-axis direction may be 0.05 mm to 0.7 mm. In an example, the spacing distance G1may be a distance from the second surface372of the first heat dissipation member370to the first surface381of the second heat dissipation member380. Alternatively, in another embodiment, the spacing distance G1may be a spacing distance between the first board unit255and the second board unit800in the optical-axis direction. In still another embodiment, the spacing distance G1may be a distance from the second surface of the first heat dissipation member370to the first surface of the second board unit800. In still another embodiment, the spacing distance G1may be a spacing distance between the first heat dissipation member370and the second heat dissipation member380in the optical-axis direction.

In another embodiment, the spacing distance G1may be 0.15 mm to 0.5 mm. In still another embodiment, the spacing distance G1may be 0.15 mm to 0.3 mm. In still another embodiment, the spacing distance G1may be 0.2 mm to 0.3 mm.

The shorter the spacing distance between the first heat dissipation member370and the second heat dissipation member380, the greater the effect of transfer of heat from the first heat dissipation member370to the second heat dissipation member380. However, if the spacing distance is too short, the OIS moving unit and the fixed unit may collide with each other due to spatial interference therebetween during OIS operation. That is, the spacing distance G1may be 0.15 mm to 0.3 mm in order to smoothly perform OIS operation and to improve the heat dissipation effect.

As shown inFIG.22, since the image sensor810is disposed in the bore262in the second circuit board260and the first heat dissipation member370is disposed in the recess265in the second circuit board260, it is possible to reduce the height of the space occupied by the second circuit board260, the image sensor810, and the first heat dissipation member370in the optical-axis direction.

In addition, as shown inFIG.13B, when viewed from above, the first board unit255and the first heat dissipation member370are located in the bore800A in the second board unit800, and accordingly, it is possible to reduce the distance between the first board unit255and the second board unit800in the optical-axis direction by the depth (or the length) of the bore800A in the second board unit800in the optical-axis direction. As a result, it is possible to reduce the length (or the height) of the camera device100in the optical-axis direction. Here, “H1” represents a distance (or a height) from the second surface801B of the second board unit800(or the second surface382of the second heat dissipation member380) to the upper end of the lens module400(or the upper end of the lens).

In addition, the space between the first board unit255and the second board unit800may be increased by the bore800A. Accordingly, it is possible to reduce the spacing distance between the first board unit255and the second board unit800. As a result, the heat dissipation effect may be improved due to the reduction in the spacing distance.

FIG.23Ais a schematic conceptual view of a lens module, a second circuit board, an image sensor, a first heat dissipation member, a second board unit, and a second heat dissipation member according to another embodiment.

Referring toFIG.23A, the OIS moving unit may include a first heat dissipation member370-1, a second circuit board260, which is disposed on the first heat dissipation member370-1and has a bore262formed therein to expose a portion of the first heat dissipation member370-1, and an image sensor810, which is disposed on the portion of the first heat dissipation member370-1that is exposed through the bore262. In an example, the image sensor810may be disposed in the bore (or the hole)262in the second circuit board260, and may be coupled to the first heat dissipation member370-1.

The fixed unit may include a second board unit800-1, which is disposed so as to be spaced apart from the first heat dissipation member370-1, and a second heat dissipation member380A, which is disposed on the second board unit800-1so as to face the first heat dissipation member370-1in the optical-axis direction. The support member (e.g. the support board310) may support the OIS moving unit with respect to the fixed unit so that the OIS moving unit moves in a direction perpendicular to the optical-axis direction. The second heat dissipation member380A may be disposed so as to overlap the first heat dissipation member370-1in the optical-axis direction.

In an example, the first heat dissipation member370-1may include a body37A, which is disposed under the second circuit board260, and a protruding portion (or a protruding region)37B, which protrudes from the body37A and is disposed in the bore262in the second circuit board260. The image sensor810may be disposed on the protruding portion37B. In an example, the image sensor810may be coupled or attached to the upper surface of the protruding portion37B. In an example, the upper surface of the protruding portion37B may be located at a lower position than the upper surface of the second circuit board260. In another embodiment, the upper surface of the protruding portion37B may be located at the same height as the upper surface of the second circuit board260.

The second heat dissipation member380A may be disposed on a first surface801A (or the upper surface) of the second board unit800-1, which faces the first heat dissipation member370-1in the optical-axis direction. The first heat dissipation member370-1may overlap the second heat dissipation member380A in the optical-axis direction.

Unlike the second board unit800shown inFIG.22, the second board unit800-1may not have the bore800A shown inFIG.22. The second board unit800-1may include a first conductive layer93, which is exposed to the first surface801A and is in contact with the second heat dissipation member380A, for example, the lower surface of the second heat dissipation member380A. In an example, the first conductive layer93may be thermally bonded to the lower surface of the second heat dissipation member380A, or may be coupled to the lower surface of the second heat dissipation member380A by means of a conductive adhesive, for example, solder. In addition, in an example, the first conductive layer93may be conductively connected to the second heat dissipation member380A.

The second board unit800-1may include a second conductive layer92A, which is connected to the first conductive layer93and is exposed from a second surface801B (or the lower surface) of the second board unit800-1, which is a surface opposite the first surface801A of the second board unit800-1. In an example, the second conductive layer92A may be conductively connected to the ground of the second board unit800-1.

The first conductive layer93may take the form of a via, which is formed through at least a portion of the second board unit800-1. In addition, the first conductive layer93may have a first via93A formed through the second board unit800-1so as to be open or exposed to the second surface801B of the second board unit800-1. In addition, one end of the first conductive layer93may be in contact with the lower surface of the second heat dissipation member380, and the other end thereof may have a second via93B formed therein so as to be in contact with, coupled to, or connected to the second conductive layer92A.

As shown inFIG.23A, the second conductive layer92A may be disposed in, coupled to, or attached to a recess formed in the second surface800B of the second board unit800-1. In another embodiment, the second conductive layer may be disposed on, coupled to, or attached to the second surface800B of the second board unit800-1, which is a flat surface in which no recess is formed.

Each of the first conductive layer93and the second conductive layer92A may serve as a heat dissipation pattern or a heat dissipation pad for dissipating heat from the second board unit800-1. That is, because the first conductive layer93and the second conductive layer92A are provided only for the purpose of heat dissipation, the first conductive layer93and the second conductive layer92A are not conductively connected to wires of the second board unit800-1other than the ground of the second board unit. In this case, the other wires may be wires conductively connected to an electronic element or a circuit element, such as the controller830or780or the image sensor810.

The second conductive layer92A may be conductively connected to the cover member300(e.g. the side plate302) via solder, a conductive adhesive, or a sheet of conductive tape. Alternatively, in another embodiment, the second conductive layer92A, which is connected to the ground of the second board unit800-1, may be conductively connected to the cover member300via a bracket. The bracket may be a structure in which the camera device is accommodated or received in order to protect the camera device. In an example, the bracket may be formed of a conductive material. Since the ground of the second board unit800-1, the second heat dissipation member380A, and the cover member300are conductively connected to one another, it is possible to protect the camera device100from static electricity and to improve the heat dissipation effect.

In another embodiment, at least one of the first conductive layer or the second conductive layer of the second board unit800-1may also be applied to the second circuit board260. In an example, the second circuit board260according to another embodiment may include at least one third conductive layer, which is in contact with the first heat dissipation member370-1, and at least a portion of the third conductive layer may be exposed from the second circuit board260.

Since the second heat dissipation member380A is disposed on the first surface of the second board unit800-1, the spacing distance from the first heat dissipation member370A may be reduced, and accordingly, the heat dissipation effect may be improved.

The description of “G1” inFIG.22may also apply to “G1” inFIG.23A.

In an example, the thickness T2of the first heat dissipation member370-1may be smaller than or equal to the thickness T1of the second circuit board260. In another embodiment, the thickness of the first heat dissipation member370-1may be larger than the thickness of the second circuit board260.

In an example, the thickness T1of the second circuit board260may be 0.15 mm to 0.25 mm. In another embodiment, the thickness T1may be 0.18 mm to 0.22 mm. In still another embodiment, the thickness T1may be 0.2 mm to 0.22 mm.

In an example, the thickness T2of the first heat dissipation member370-1may be 0.08 mm to 0.15 mm. In an example, the thickness T2may be 0.1 mm to 0.12 mm. Alternatively, in another example, the thickness T2may be 0.1 mm to 0.15 mm.

In an example, the thickness T21of the body37A of the first heat dissipation member370-1and the thickness T22of the protruding portion37B may be equal to each other. In another embodiment, the thickness of the body37A may be larger than the thickness of the protruding portion37B. In still another embodiment, the thickness of the body37A may be smaller than the thickness of the protruding portion37B.

In an example, the value T21/T22obtained by dividing the thickness T21of the body37A by the thickness T22of the protruding portion37B may be 1 to 3. In another embodiment, the value T22/T21obtained by dividing the thickness T22of the protruding portion37B by the thickness T21of the body37A may be 1 to 3.

The thickness T3of the second heat dissipation member380A may be equal to the thickness T2of the first heat dissipation member370-1. In an example, the description of “T2” may also apply to “T3”.

The thickness T4of the second board unit800may be larger than or equal to the thickness T3of the second heat dissipation member800-1.

In an example, the thickness T4of the second board unit800, e.g. the first region801, may be 0.15 mm to 0.3 mm. In an example, the thickness T4may be 0.2 mm to 0.28 mm. Alternatively, in an example, the thickness T4may be 0.24 mm to 0.26 mm.

An adhesive may be disposed between the second board unit800and the second heat dissipation member380A in order to attach or bond the second board unit800and the second heat dissipation member380A to each other. In this case, the thickness of the adhesive may be 0.01 mm to 0.04 mm. In another embodiment, the thickness of the adhesive may be 0.02 mm to 0.03 mm.

In an example, the thickness T5of the image sensor810may be 0.1 mm to 0.25 mm. In another embodiment, the thickness T5of the image sensor810may be 0.12 mm to 0.21 mm. In still another embodiment, the thickness T5may be 0.12 mm to 0.15 mm.

In an example, the value G1/T1obtained by dividing the gap G1between the OIS moving unit (e.g. the first heat dissipation member370-1) and the fixed unit (e.g. the second heat dissipation member380A) by the thickness T1of the second circuit board260may be 0.8 to 2. Alternatively, the value G1/T1may be 1.2 to 2.

If the value G1/T1is less than 0.8, the thickness of the second circuit board260may be too large. Thus, the size (e.g. the height) of the camera device may be increased, and it may not be possible to secure a sufficient gap G1between the fixed unit and the OIS moving unit for implementation of OIS operation. On the other hand, if the value G1/T1is greater than 2, “G1” may be too large. Thus, the heat dissipation effect may be deteriorated, and the size (e.g. the height) of the camera device may be increased.

In an example, the value G1/T2obtained by dividing the gap G1between the OIS moving unit (e.g. the first heat dissipation member370-1) and the fixed unit (e.g. the second heat dissipation member380A) by the thickness T2of the first heat dissipation member370-1may be 1.4 to 3.75. Alternatively, in an example, the value G1/T2may be 1.8 to 2.5. Alternatively, in an example, the value G1/T2may be 2 to 2.1.

If the value G1/T2is less than 1.4, the thickness of the first heat dissipation member370-1may be too large. Therefore, the weight of the OIS moving unit may be increased, and thus the amount of power that is consumed during OIS operation may be increased. In addition, the size of the camera device in the optical-axis direction may be increased. On the other hand, if the value G1/T2is greater than 3.75, the thickness of the first heat dissipation member370-1may be too small. Therefore, the heat dissipation effect may be reduced, and thus the heat dissipation function may be deteriorated.

In an example, the value T1/T2obtained by dividing the thickness T1of the second circuit board260by the thickness T2of the first heat dissipation member370-1may be 1 to 3.125. Alternatively, in an example, the value T1/T2may be 1 to 2.5. Alternatively, in an example, the value T1/T2may be 2 to 2.5.

If the value T1/T2is less than 1, the weight of the first heat dissipation member370-1may be too large. Therefore, the weight of the OIS moving unit may be increased, and thus the amount of power that is consumed during OIS operation may be increased. In addition, the size of the camera device in the optical-axis direction may be increased.

On the other hand, if the value T1/T2is greater than 3.125, the thickness of the first heat dissipation member370-1may be too small. Therefore, the heat dissipation effect may be reduced, and thus the heat dissipation function may be deteriorated.

In an example, the value T4/T3obtained by diving the thickness T4of the second board unit800-1, e.g. the first region801, by the thickness T3of the second heat dissipation member380A may be 1 to 3.75. Alternatively, in an example, the value T4/T3may be 1.5 to 3. Alternatively, in an example, the value T4/T3may be 2.4 to 2.6.

If the value T4/T3is less than 1, the thickness of the second heat dissipation member380A may be too large, and thus it may be difficult to secure a sufficient spacing distance G1between the OIS moving unit (e.g. the first heat dissipation member370-1) and the fixed unit (e.g. the second heat dissipation member380A).

On the other hand, if the value T4/T3is greater than 3.75, the thickness of the second heat dissipation member380A may be too small, and thus the heat dissipation effect may be reduced. In addition, the second heat dissipation member380A may not sufficiently serve as a reinforcement member for supporting the second board unit800-1. Thus, the second board unit800-1may be bent, and accordingly, a warpage phenomenon may occur.

In an example, the value G1/T4obtained by dividing the gap G1between the OIS moving unit (e.g. the first heat dissipation member370-1) and the fixed unit (e.g. the second heat dissipation member380A) by the thickness T4of the second board unit800-1may be ⅔ to 2.

If the value G1/T4is less than ⅔, the gap between the OIS moving unit and the fixed unit may be too small. Thus, spatial interference may occur between the OIS moving unit and the fixed unit during OIS operation, and consequently, the OIS operation may not be smoothly implemented. On the other hand, the value G1/T4is greater than 2, the gap G1may be too large. Thus, the heat dissipation effect may be reduced, and the size (e.g. the height) of the camera device may be increased.

In an example, the value T5/T2obtained by dividing the thickness T5of the image sensor810by the thickness T2of the first heat dissipation member370-1may be 0.67 to 3.125. Alternatively, in an example, the value T5/T2may be 1 to 2. Alternatively, in an example, the value T5/T2may be 1.5 to 2.

The value T5/T2is less than 0.67, the weight of the first heat dissipation member370-1may be too large. Therefore, the weight of the OIS moving unit may be increased, and thus the amount of power that is consumed during OIS operation may be increased. On the other hand, if the value T5/T2is greater than 3.125, the thickness of the first heat dissipation member370-1may be too small. Therefore, the heat dissipation effect may be reduced, and thus the heat dissipation function may be deteriorated.

The area of the first heat dissipation member370-1, for example the area of the upper surface of the protruding portion38B, may be larger than or equal to the area of the upper surface (or the lower surface) of the image sensor810. In another embodiment, the area of the upper surface of the protruding portion38B may be smaller than the area of the lower surface of the image sensor810.

In an example, the area of the lower surface (or the upper surface) of the first heat dissipation member370-1may be 50% or more of the area of the lower surface (or the upper surface) of the image sensor810. Alternatively, in an example, the area of the lower surface (or the upper surface) of the first heat dissipation member370-1may be 100% to 200% of the area of the lower surface (or the upper surface) of the image sensor810. Alternatively, in an example, the area of the lower surface (or the upper surface) of the first heat dissipation member370-1may be 100% to 150% of the area of the lower surface (or the upper surface) of the image sensor810.

In an example, the area of the lower surface (or the upper surface) of the second heat dissipation member380may be 50% or more of the area of the upper surface (or the lower surface) of the second board unit800-1(e.g. the first region801). Alternatively, in an example, the area of the lower surface (or the upper surface) of the second heat dissipation member380may be 90% to 200% of the area of the upper surface (or the lower surface) of the first region801. Alternatively, in an example, the area of the lower surface (or the upper surface) of the second heat dissipation member380may be 90% to 150% of the area of the upper surface (or the lower surface) of the first region801.

In an example, when viewed in the optical-axis direction or from above, the area of the first heat dissipation member370-1may be 50% to 100% of the area of the second heat dissipation member380. Alternatively, in an example, when viewed in the optical-axis direction or from above, the area of the first heat dissipation member370-1may be 55% to 90% of the area of the second heat dissipation member380. Alternatively, in an example, when viewed in the optical-axis direction or from above, the area of the first heat dissipation member370-1may be 55% to 80% of the area of the second heat dissipation member380. In an example, the area of each of the heat dissipation members370-1and380A may be the area of the upper surface or the lower surface of each of the heat dissipation members370-1and380A.

If the area of the first heat dissipation member370-1is less than 50% of the area of the second heat dissipation member380, the size of the first heat dissipation member370-1may be too small. Therefore, the first heat dissipation member370-1may not sufficiently implement a function of receiving heat from the image sensor810and dissipating the heat, and thus the heat dissipation effect of the camera device may be reduced.

On the other hand, if the area of the first heat dissipation member370-1is greater than 100% of the area of the second heat dissipation member380, the size of the first heat dissipation member370-1may be too large. Therefore, the length of the OIS moving unit in the horizontal direction may be increased, spatial interference may occur between the OIS moving unit and the fixed unit during OIS operation, and thus the OIS operation may be erroneously implemented. In an example, when the area of the first heat dissipation member370-1is 55% to 80% of the area of the second heat dissipation member380, the heat dissipation effect may be improved, and spatial interference between the OIS moving unit and the fixed unit may be inhibited during the OIS operation.

In an example, when viewed in the optical-axis direction or from above, the overlapping area between the first heat dissipation member370-1and the second heat dissipation member380A may be 80% to 100% of the area of the first heat dissipation member380A. If the overlapping area is less than 80% of the area of the first heat dissipation member380A, the effect of heat dissipation through heat transfer between the first heat dissipation member370-1and the second heat dissipation member380A may be reduced. In addition, when the overlapping area is 100% of the area of the first heat dissipation member380A, the heat dissipation effect may be maximized.

The area of the first heat dissipation member370-1may be smaller than the area of the second circuit board260. In an example, when viewed in the optical-axis direction or from above, the area of the second circuit board260may be the area of the region present within the outer periphery or the outer circumference of the second circuit board260. In an example, the area of the second circuit board260may be the area of the region present within the outer periphery or the outer circumference of the upper surface or the lower surface of the second circuit board260.

In another embodiment, the area of the first heat dissipation member370-1may be equal to the area of the second circuit board260. In still another embodiment, the area of the first heat dissipation member370-1may be larger than the area of the second circuit board260.

In an example, the area of the first heat dissipation member370-1may be smaller than the area of the second board unit800-1. In an example, the area of the first heat dissipation member370-1may be smaller than the area of the first region801of the second board unit800-1. The area of the second board unit800-1may be the area of the upper surface or the lower surface of the first region801of the second board unit800-1.

In an example, the area of the first heat dissipation member370-1may be 50% to 100% of the area of the second circuit board260. Alternatively, in an example, the area of the first heat dissipation member370-1may be 55% to 90% of the area of the second circuit board260. Alternatively, in an example, the area of the first heat dissipation member370-1may be 60% to 80% of the area of the second circuit board260.

In an example, the area of the second heat dissipation member380A may be 70% to 120% of the area of the second board unit800-1. In an example, the area of the second board unit800-1may be the area of the upper surface or the lower surface of the first region801of the second board unit800-1. Alternatively, in an example, the area of the second heat dissipation member380A may be 80% to 100% of the area of the second board unit800-1. Alternatively, in an example, the area of the second heat dissipation member380A may be 70% to 90% of the area of the second board unit800-1.

When the area of the second heat dissipation member380A is less than 70% of the area of the second board unit800-1, the heat dissipation effect may be reduced, and an area sufficient to support the second board unit800-1may not be secured, leading to warpage of the second board unit800-1. When the area of the second heat dissipation member380A is greater than 120% of the area of the second board unit800-1, the size of the camera device in the horizontal direction may be increased excessively, and spatial interference with other components (e.g.802and803) peripheral to the first region801of the second board unit800-1or with another separate camera device may occur.

The above description of T1to T4may also apply to the second circuit board, the first heat dissipation member, the second heat dissipation member, and the second board unit according to other embodiments shown inFIGS.22and23B to25C.

In addition, the above description of the area of the first heat dissipation member370-1, the area of the second heat dissipation member380A, the area of the second circuit board260, and the area of the second board unit800-1may also apply to the second circuit board, the first heat dissipation member, the second heat dissipation member, and the second board unit according to other embodiments shown inFIGS.22and23B to25C.

Referring toFIG.23B, the first heat dissipation member370-2may not include the protruding portion shown inFIG.23A. The upper surface of the first heat dissipation member370-2may be a flat surface, a portion of the upper surface of the first heat dissipation member370-2may be open or exposed through the bore262in the second circuit board260, and the image sensor810may be disposed on, coupled to, or attached to the portion of the upper surface of the first heat dissipation member370-2that is exposed through the bore262.

Referring toFIG.23C, the second circuit board260-1may have a recess262-1formed therein. In an example, the recess262-1may be depressed into the upper surface of the second circuit board260-1, and may include a bottom surface and a side surface. The image sensor810may be disposed in the recess262-1. The image sensor810may be disposed on, coupled to, or attached to the bottom surface of the recess262-1.

In an example, at least a portion of the second circuit board260-1may be disposed or interposed between the image sensor810and the first heat dissipation member370-2. Compared to the embodiment shown inFIG.23A, since the embodiment shown inFIG.23Cdoes not have the bore262shown inFIG.23A, it is possible to secure a sufficient space for disposing or designing a circuit pattern or wiring, thereby increasing freedom of design of circuits on the second circuit board260-1.

Referring toFIG.23D, the second circuit board260-2may not have the through-hole-type bore262shown inFIG.23Aor the recess262-1shown inFIG.23C. The image sensor810may be disposed on the upper surface of the second circuit board260-2, which is a flat surface.

Referring toFIG.23E, the second circuit board260may have a bore262formed therein, and may have the recess265described above with reference toFIG.12B. The first heat dissipation member370may be disposed in, coupled to, or attached to the recess265in the second circuit board260.

Referring toFIG.23F, the second circuit board260-3may have a first recess262-1formed in the upper surface thereof and a second recess265formed in the lower surface thereof. The description of the recess262-1inFIG.23Cmay also apply to the first recess262-1inFIG.23F, and the description of the recess265inFIG.23Emay also apply to the second recess265inFIG.23F.

The first heat dissipation member370may be disposed in, attached to, or coupled to the recess265formed in the second surface260B (refer toFIG.12B) of the second circuit board260-3. In an example, at least a portion of the first heat dissipation member370may not project outside the recess265. In another embodiment, at least a portion (e.g. the lower portion) of the first heat dissipation member370may project outside the recess265.

Referring toFIG.23G, the first heat dissipation member370may have a groove, a hole, or an uneven portion373formed in a predetermined pattern in the lower surface thereof in order to increase the heat dissipation area. The predetermined pattern of the first heat dissipation member370may face or overlap that of the second heat dissipation member380A in the optical-axis direction. The description of the predetermined pattern inFIG.12Bmay also apply to the pattern inFIG.23G.

Referring toFIG.23H, the second heat dissipation member380A may have a groove, a hole, or an uneven portion383formed in a predetermined pattern therein so as to correspond to or face the groove, the hole, or the uneven portion373in the first heat dissipation member370.

In an example, the groove, the hole, or the uneven portion383may be formed in a predetermined pattern in the upper surface of the second heat dissipation member380A. In an example, the groove, the hole, or the uneven portion373in the first heat dissipation member370-1may face or overlap the groove, the hole, or the uneven portion383A in the second heat dissipation member380A in the optical-axis direction. In another embodiment, the groove, the hole, or the uneven portion for increasing the heat dissipation effect may be formed in the upper surface of the first heat dissipation member370-1. In an example, the groove, the hole, or the uneven portion for increasing the heat dissipation effect may be formed in the upper surface of the protruding portion37B. In still another embodiment, the groove, the hole, and the uneven portion for increasing the heat dissipation effect may be formed in at least one of the upper surface or the lower surface of the second heat dissipation member.

The description made with reference toFIG.23Hmay also apply to the first heat dissipation member and the second heat dissipation member inFIGS.23A to23F.

Referring toFIG.24A, the second board unit800may have a bore800A formed therein.

When viewed from above or in the optical-axis direction, at least a portion (e.g. the lower end) of the first heat dissipation member370may be located in the bore800A in the second board unit800. In an example, at least a portion (e.g. the lower end) of the first heat dissipation member370may face or overlap the bore800A in the second board unit800in a direction perpendicular to the optical axis.

Alternatively, in another embodiment, when viewed from above or in the optical-axis direction, at least a portion (e.g. the lower end) of the second circuit board260may be located in the bore800A in the second board unit800. In an example, at least a portion (e.g. the lower end) of the second circuit board260may face or overlap the bore800A in the second board unit800in a direction perpendicular to the optical axis.

As described above with reference toFIG.13B, when viewed from above, since a portion of the first heat dissipation member370is located in the bore800A in the second board unit800, the height of the second board unit800based on the lower surface of the second board unit800may be reduced. Accordingly, the length (or the height) H1 of the camera device100in the optical-axis direction may be reduced. In addition, the distance G1between the first heat dissipation member370-1and the second heat dissipation member380B in the optical-axis direction may be reduced, and consequently, the heat dissipation effect may be further improved.

FIG.24Billustrates a modification100-10ofFIG.24A. Referring toFIG.24B, the groove, the hole, or the uneven portion described above with reference toFIG.22may be formed in a predetermined pattern in the lower surface of the second heat dissipation member380.

The second circuit board260, the first heat dissipation member370-2, and the image sensor810inFIG.24Cmay be the same as those of the embodiment100-2inFIG.23B.

Referring toFIG.24D, the second heat dissipation member380B may be disposed on, coupled to, or attached to a first surface801A (or the upper surface) of the second board unit800-2. The second board unit800-2may have a recess57formed in the first surface801A thereof to allow the second heat dissipation member380A to be seated or accommodated therein. The recess57may be depressed into the first surface801A of the second board unit800-2. In an example, the second heat dissipation member380B may be disposed in the recess57in the second board unit800-2.

The second board unit800-2may include a conductive layer55A, which is connected to, coupled to, or in contact with the second heat dissipation member380B. In an example, the conductive layer55A may be in contact with, coupled to, or connected to the lower surface of the second heat dissipation member380B.

The conductive layer55A may be exposed to a second surface801B (or the lower surface) of the second board unit800-2. The conductive layer55A may be connected to a ground terminal of the second board unit800-2by means of solder or a conductive adhesive. In addition, the conductive layer55A may be conductively connected to the cover member300(e.g. the side plate302) via solder, a conductive adhesive, or a sheet of conductive tape.

In another embodiment, the second board unit800-2may include the first conductive layer93and the second conductive layer92A shown inFIG.23Bin place of the conductive layer55A shown inFIG.24D, and the description made with reference toFIG.23Bmay apply thereto.

Referring toFIG.24E, the second circuit board260-2, the first heat dissipation member370-2, and the image sensor810described above with reference toFIG.23Dmay be applied to the embodiment100-13inFIG.23E.

Referring toFIG.25A, the second heat dissipation member380C may be disposed under the second board unit800-3. In an example, the second heat dissipation member380C may be disposed on, coupled to, or attached to a second surface801B of the second board unit800-3. In example, the second board unit800-3may not have the bore800A shown inFIG.24A.

Referring toFIG.25B, the second heat dissipation member380C may have at least one groove, hole, or uneven portion383formed in a predetermined pattern therein in order to improve the heat dissipation effect.

In an example, the groove, the hole, or the uneven portion383may be formed in a predetermined pattern in the lower surface of the second heat dissipation member380C.

Referring toFIG.25C, the second board unit800-4may have a recess805A formed in a second surface801B thereof. The recess805A may include a bottom surface and a side surface. The second heat dissipation member380C may be disposed in, coupled to, or attached to the recess805A formed in the second surface801B of the second board unit800-4. In an example, the second heat dissipation member380C may be disposed on, coupled to, or attached to the bottom surface of the recess805A in the second board unit800-4. In another embodiment, the second heat dissipation member shown inFIG.25Cmay not include the groove, the hole, or the uneven portion383formed in a predetermined pattern.

The second heat dissipation member380C may not project outside the recess805A. In another embodiment, at least a portion (e.g. the lower portion) of the second heat dissipation member380C may project outside the recess805A in the second board unit800-4.

The embodiments of the second circuit board, the first heat dissipation member, and the image sensor described with reference toFIGS.23A to23Hand the embodiments of the second board unit and the second heat dissipation member described with reference to FIGS.24A to25C may be combined with each other or may be replaced with each other to be modified in various forms.

In still another embodiment, in order to improve the heat dissipation effect, at least one of the first board unit255or the second board unit800may include a heat dissipation pattern (or a metal pattern or a metal member).

The heat dissipation pattern (not shown) may be formed such that a portion of a plating layer of each of the first board unit255and the second board unit800is exposed from an insulating layer (e.g. polyimide). In an example, the heat dissipation pattern may be conductively separated or isolated from the wire or the circuit pattern of each of the first and second board units. In an example, the heat dissipation pattern may be formed on each of the second circuit board260and the second board unit800.

In an example, each of the first board unit255and the second board unit800may include a plurality of metal layers stacked on each other and an insulating layer disposed between the plurality of metal layers. A portion of at least one of the plurality of metal layers may be formed as a heat dissipation pattern. In an example, the heat dissipation pattern may be exposed from the insulating layer. Alternatively, the entirety of any one of the plurality of layers may be formed as a heat dissipation pattern.

In still another embodiment, in order to improve the heat dissipation effect, at least one of the first board unit255or the second board unit800may have a cavity or a through-hole formed in a predetermined pattern therein.

In an example, the second circuit board260may include a plurality of cavities disposed so as to surround an element disposed on the second circuit board260, for example, the image sensor810. Alternatively, the second board unit800may include a plurality of cavities disposed adjacent to the elements820and512disposed on the second board unit800. In this case, the plurality of cavities may be disposed so as to surround the elements820and512disposed on the second board unit800.

As described above, the embodiments may improve the heat dissipation effect of the camera device100using the first heat dissipation member370and the second heat dissipation member380, and thus may inhibit an increase in the temperature of the camera device100due to an increase in the amount of heat that is generated. Accordingly, the embodiments may inhibit an increase in noise of the image sensor and deterioration in the resolution of the image sensor, and may inhibit deterioration in the reliability of auto-focusing due to expansion of the lens.

In addition, according to the embodiments, the image sensor810may be disposed on the first heat dissipation member270through the bore262in the second circuit board260, and the first board unit may be located close to the second heat dissipation member through the bore800A in the second board unit800. Accordingly, the length (or the height) of the camera device in the optical-axis direction may be reduced, and the size of the camera device100may be reduced. The above-described heat dissipation pattern and the above-described cavity or through-hole formed in a predetermined pattern may be applied to any one of the embodiments shown inFIGS.22to25C.

In addition, the camera device according to the embodiment may be included in an optical instrument for the purpose of forming an image of an object present in a space using reflection, refraction, absorption, interference, and diffraction, which are characteristics of light, for the purpose of increasing visibility, for the purpose of recording and reproduction of an image using a lens, or for the purpose of optical measurement or image propagation or transmission. For example, the optical instrument according to the embodiment may be a cellular phone, a mobile phone, a smartphone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, etc., without being limited thereto, and may also be any of devices for capturing images or pictures.

FIG.26is a perspective view of the optical instrument200A according to the embodiment, andFIG.27is a configuration diagram of the optical instrument200A shown inFIG.26.

Referring toFIGS.26and27, the optical instrument200A may include a body850, a wireless communication unit710, an A/V input unit720, a sensor740, an input/output unit750, a memory760, an interface unit770, a controller780, and a power supply790.

The body850shown inFIG.26may have a bar shape, without being limited thereto, and may be any of various types such as, for example, a slide type, a folder type, a swing type, or a swivel type, in which two or more sub-bodies are coupled so as to be movable relative to each other.

The body850may include a case (a casing, a housing, a cover, or the like) defining the external appearance thereof. In an example, the body850may be divided into a front case851and a rear case852. A variety of electronic components of the terminal may be mounted in the space formed between the front case851and the rear case852.

The wireless communication unit710may include one or more modules, which enable wireless communication between the optical instrument200A and a wireless communication system or between the optical instrument200A and a network in which the optical instrument200A is located. In an example, the wireless communication unit710may include a broadcast reception module711, a mobile communication module712, a wireless Internet module713, a nearfield communication module714, and a location information module715.

The audio/video (A/V) input unit720serves to input audio signals or video signals, and may include a camera721and a microphone722.

The camera721may include the camera device according to the embodiment.

The sensor740may sense the current state of the optical instrument200A, such as the open or closed state of the optical instrument200A, the position of the optical instrument200A, the presence or absence of a user's touch, the orientation of the optical instrument200A, or the acceleration/deceleration of the optical instrument200A, and may generate a sensing signal to control the operation of the optical instrument200A. For example, when the optical instrument200A is a slide-type phone, whether the slide-type phone is open or closed may be detected. In addition, the sensor740serves to sense whether power is supplied from the power supply790or whether the interface unit770is coupled to an external device.

The input/output unit750may include a keypad unit730, a display module751, a sound output module752, and a touchscreen panel753. The keypad unit730may generate input data in response to input to a keypad.

The display module751may include a plurality of pixels, the color of which varies in response to electrical signals. In an example, the display module751may include at least one of a liquid crystal display, a thin-film transistor liquid crystal display, an organic light-emitting diode, a flexible display, or a 3D display.

The sound output module752may output audio data received from the wireless communication unit710in a call-signal reception mode, a call mode, a recording mode, a voice recognition mode, or a broadcast reception mode, or may output audio data stored in the memory760.

The touchscreen panel753may convert variation in capacitance, caused by a user's touch on a specific region of a touchscreen, into electrical input signals.

The memory760may store programs for the processing and control of the controller780, and may temporarily store input/output data (e.g. a phone book, messages, audio, still images, pictures, and moving images). For example, the memory760may store images captured by the camera721, for example, pictures or moving images. For example, the memory760may store software, an algorithm, or an equation for implementation of hand-tremor compensation described above.

The interface unit770serves as a passage for connection between the optical instrument200A and an external device. The interface unit770may receive data or power from the external device, and may transmit the same to respective components inside the optical instrument200A, or may transmit data inside the optical instrument200A to the external device. For example, the interface unit770may include a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connection of a device having an identification module, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port.

The controller780may control the overall operation of the optical instrument200A. For example, the controller780may perform control and processing related to voice calls, data communication, and video calls.

The controller780may include a multimedia module781for multimedia playback. The multimedia module781may be provided inside the controller180, or may be provided separately from the controller780.

The controller780may perform pattern recognition processing, by which writing or drawing input to the touchscreen is perceived as characters or images.

The power supply790may supply power required to operate the respective components upon receiving external power or internal power under the control of the controller780.

The features, structures, effects, and the like described above in the embodiments are included in at least one embodiment of the present disclosure, but are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like exemplified in the respective embodiments may be combined with other embodiments or modified by those skilled in the art. Therefore, content related to such combinations and modifications should be construed as falling within the scope of the present disclosure.

INDUSTRIAL APPLICABILITY

Embodiments may be used for a camera device exhibiting improved heat dissipation efficiency and having reduced height in an optical-axis direction and an optical instrument including the same.