Source: https://patents.google.com/patent/JP2005044699A/en
Timestamp: 2020-04-03 01:25:05
Document Index: 784789631

Matched Legal Cases: ['art 952', 'art 512', 'art 552', 'art 552', 'arts 552', 'arts 552', 'arts 552', 'art 552', 'art, 512', 'art, 552', 'art, 602', 'art, 802', 'art, 954', 'art,\n2']

JP2005044699A - Lighting fixture for vehicle and light source module - Google Patents
Lighting fixture for vehicle and light source module Download PDF
JP2005044699A
JP2005044699A JP2003279425A JP2003279425A JP2005044699A JP 2005044699 A JP2005044699 A JP 2005044699A JP 2003279425 A JP2003279425 A JP 2003279425A JP 2003279425 A JP2003279425 A JP 2003279425A JP 2005044699 A JP2005044699 A JP 2005044699A
JP2003279425A
2003-07-24 Priority to JP2003279425A priority Critical patent/JP2005044699A/en
2005-02-17 Publication of JP2005044699A publication Critical patent/JP2005044699A/en
<P>PROBLEM TO BE SOLVED: To provide a lighting fixture for a vehicle appropriately forming a light distribution pattern. <P>SOLUTION: The lighting fixture used for vehicles is equipped with a light source module generating light, an optical member irradiating the light generated by the light source module outside the lighting fixture for the vehicle, and a light source fixing part fixing the light source module with a relative position to the optical member at a known standard position. Then, the light source module has a standard part fixed in accordance with the standard position, a semiconductor light-emitting element generating light from a prescribed light-emitting region in advance, and a holding part holding the semiconductor light-emitting element with the center of the light-emitting region adapted to the relative position to the standard part with the known position, when the light source module is fixed at the light source fixing part. <P>COPYRIGHT: (C)2005,JPO&NCIPI
The present invention relates to a vehicular lamp and a light source module. In particular, the present invention relates to a vehicular lamp used in a vehicle.
In a vehicular lamp such as a vehicular headlamp, it may be necessary to form a light distribution pattern with high accuracy from a safety standpoint. This light distribution pattern is formed by an optical system using, for example, a reflecting mirror or a lens (see, for example, Patent Document 1). In recent years, use of a semiconductor light emitting element for a vehicle headlamp has been studied.
JP-A-6-89601 (pages 3-7, FIG. 1-14)
In the optical design for forming the light distribution pattern, it may be necessary to consider the shape of the light emitting region of the light source. Further, the semiconductor light emitting element generates light from a light emitting region having a predetermined spread, such as the entire surface. Therefore, when a semiconductor light emitting element is used for a vehicle headlamp, the optical design is complicated, and it may be difficult to form an appropriate light distribution pattern.
In order to solve the above-described problems, in the first embodiment of the present invention, a vehicle lamp used in a vehicle, the light source module for generating light, and the light generated by the light source module are connected to the outside of the vehicle lamp. An optical member that irradiates the light source, and a light source fixing part that fixes the light source module at a reference position whose relative position with respect to the optical member is known. The light source module has a reference position when the light source module is fixed to the light source fixing part. The semiconductor light emitting element is held by aligning the center of the light emitting region with a known position relative to the reference portion, the reference light emitting portion fixed in accordance with the light emitting region, and the semiconductor light emitting device that generates light from a predetermined light emitting region. Holding part.
The reference part is one side of the holding part, the light source fixing part has a reference side indicating a reference position, and a surface including one side of the holding part is brought into contact with a surface including the reference side. Thus, the light source module may be fixed by aligning the reference portion with the reference position.
In addition, the reference portion may be a hole or a protrusion formed in the holding portion, and the light source fixing portion may have a fitting portion to be engaged with the reference portion that is a hole or a protrusion at the reference position. The light source module has at least two reference portions, and the light source fixing portion has at least two reference portions to be fitted with each of at least two reference portions, and one of the two fitting portions has the two reference portions. It may be engaged with the corresponding reference portion while having play in the direction connecting the two engaging portions.
The light source module has a first reference portion that is a hole or a protrusion and a second reference portion that is one side of the holding portion, and the light source fixing portion further has a reference side that indicates a reference position. Then, the reference portion may be aligned with the reference position by bringing the surface including one side of the holding portion into contact with the surface including the reference side.
According to the second aspect of the present invention, a light source module that generates light, and when the light source module is attached to a predetermined reference position, a reference portion that is fixed in accordance with the reference position, and a predetermined A semiconductor light emitting device that emits light from the light emitting region, and a holding unit that holds the semiconductor light emitting device by aligning the center of the light emitting region with a known position relative to the reference portion.
FIG.1 and FIG.2 shows an example of a structure of the vehicle lamp 10 which concerns on one Embodiment of this invention. FIG. 1 is a perspective view of a vehicular lamp 10. FIG. 2 is a horizontal sectional view of the vehicular lamp 10 by a horizontal plane crossing the middle light source unit 20. The purpose of this example is to form the light distribution pattern of the vehicular lamp 10 with high accuracy. The vehicular lamp 10 is a vehicular headlamp used for a vehicle such as an automobile, and irradiates light in front of the vehicle. The vehicular lamp 10 includes a plurality of light source units 20, a cover 12, a lamp body 14, a circuit unit 16, a plurality of heat radiation members 24, an extension reflector 28, and cables 22 and 26.
Each of the plurality of light source units 20 includes an LED module 100, and irradiates light in a predetermined light distribution pattern forward of the vehicle based on light generated by the LED module 100. For example, the light source unit 20 is supported by the lamp body 14 so as to be tiltable by an aiming mechanism for adjusting the direction of the optical axis of the light source unit 20. The light source unit 20 may be supported by the lamp body 14 so that the direction of the optical axis when the vehicular lamp 10 is attached to the vehicle body is downward, for example, about 0.3 to 0.6 °.
The plurality of light source units 20 may have the same or similar light distribution characteristics, or may have different light distribution characteristics. In another example, one light source unit 20 may have a plurality of LED modules 100. The light source unit 20 may have a semiconductor laser, for example, instead of the LED module 100.
The cover 12 and the lamp body 14 form a lamp chamber of the vehicular lamp 10 and accommodate a plurality of light source units 20 in the lamp chamber. The cover 12 and the lamp body 14 may seal and waterproof the light source unit 20. The cover 12 is formed, for example, in a transparent shape by a material that transmits light generated by the LED module 100 and is provided on the front surface of the vehicle so as to cover the front of the plurality of light source units 20. The lamp body 14 is provided so as to face the cover 12 across the plurality of light source units 20 and to cover the plurality of light source units 20 from behind. The lamp body 14 may be formed integrally with the vehicle body.
The circuit unit 16 is a module in which a lighting circuit for lighting the LED module 100 is formed. The circuit unit 16 is electrically connected to the light source unit 20 via the cable 22. Further, the circuit unit 16 is electrically connected to the outside of the vehicular lamp 10 via the cable 26.
The plurality of heat radiating members 24 are heat sinks provided in contact with at least a part of the light source unit 20. The heat radiating member 24 is formed of a material having a higher thermal conductivity than air, such as metal. The heat radiating member 24 is movable along with the light source unit 20 within a range in which the light source unit 20 is moved with respect to a fulcrum of the aiming mechanism, for example, and is sufficient to adjust the optical axis of the light source unit 20 with respect to the lamp body 14. Provided at intervals. The plurality of heat dissipating members 24 may be integrally formed with one metal member. In this case, heat can be efficiently radiated from the entirety of the plurality of heat radiating members 24.
The extension reflector 28 is a reflecting mirror formed from the lower part of the plurality of light source units 20 to the cover 12 by, for example, a thin metal plate. The extension reflector 28 is formed so as to cover at least a part of the inner surface of the lamp body 14, thereby concealing the shape of the inner surface of the lamp body 14 and improving the appearance of the vehicular lamp 10.
Further, at least a part of the extension reflector 28 is in contact with the light source unit 20 and / or the heat dissipation member 24. In this case, the extension reflector 28 has a function of a heat conducting member that conducts heat generated by the LED module 100 to the cover 12. Thereby, the extension reflector 28 radiates heat from the LED module 100. A part of the extension reflector 28 is fixed to the cover 12 or the lamp body 14. The extension reflector 28 may be formed in a frame shape that covers the upper side, the lower side, and the side of the plurality of light source units 20.
According to this example, the light source unit 20 can be reduced in size by using the LED module 100 as a light source. Moreover, since the freedom degree of arrangement | positioning of the light source unit 20 improves by this, for example, the vehicle lamp 10 with high design property can be provided.
3 and 4 show an example of the configuration of the light source unit 20. FIG. 3 is an AA vertical sectional view of the light source unit 20. FIG. 4 is a BB vertical sectional view of the light source unit 20. The light source unit 20 is a direct light source unit that irradiates light generated by the LED module 100 to the front of the vehicle, and includes the LED module 100, the substrate 500, a fixing member 202, a lens 204, an extension 208, and a housing 206. .
The LED module 100 is an example of a light source module that generates light. The LED module 100 is a light source that generates white light, for example, and includes a semiconductor light emitting element 102. The semiconductor light emitting element 102 generates light based on power received from the outside of the light source unit 20 via the cable 22 and the substrate 500. Further, the semiconductor light emitting element 102 generates light from a predetermined light emitting region such as the entire surface facing the lens 204, for example.
The substrate 500 electrically connects the LED module 100 and the cable 22 by, for example, printed wiring formed on the surface or inside thereof. In this example, the substrate 500 is a plate-like body on which the LED module 100 is placed and fixed, and has a groove 804. The groove 804 accommodates a part of the LED module 100, thereby fixing the LED module 100 at a predetermined reference position. The groove 804 fixes the LED module 100 by bringing a part of the outer surface of the LED module 100 into contact with the inner wall, for example. Therefore, according to this example, the substrate 500 can fix the LED module 100 with high accuracy. The substrate 500 is an example of a light source fixing unit that fixes the LED module 100.
In this example, at least a part of the substrate 500 is formed of a material having a higher thermal conductivity than air, such as metal. Further, at least a part of the substrate 500 is in contact with the fixing member 202. As a result, the substrate 500 transmits heat generated by the LED module 100 to the fixing member 202.
The fixing member 202 is a plate-like body having a surface facing the front of the vehicle, for example. The fixing member 202 is provided at a position where the relative position with respect to the lens 204 is known. The fixing member 202 fixes the substrate 500 on the surface thereof so as to face the LED module 100 with the substrate 500 interposed therebetween. Thereby, the fixing member 202 fixes the LED module 100 toward the front of the vehicle, and emits light toward the front of the vehicle.
The fixing member 202 has a groove 904. The groove 904 accommodates a part of the substrate 500, thereby fixing the substrate 500 at a predetermined position. The groove 904 fixes the substrate 500 by bringing a part of the substrate 500 into contact with the inner wall, for example. According to this example, the fixing member 202 can fix the substrate 500 with high accuracy.
The fixing member 202 is formed of a material having a higher thermal conductivity than air, such as metal. Thereby, the fixing member 202 has a function of a heat radiating plate that radiates heat generated by the LED module 100. Further, in this example, the fixing member 202 is in contact with the housing 206 at one end, and dissipates the LED module 100 by transferring heat generated by the LED module 100 to the housing 206, for example. Thereby, it can prevent that the emitted light amount of the LED module 100 falls with heat.
The extension 208 is formed from the vicinity of the LED module 100 to the vicinity of the edge of the lens 204 by using, for example, a thin metal plate. Thereby, the extension 208 covers and conceals the gap between the inner surface of the housing 206 and the LED module 100, and improves the appearance of the vehicular lamp 10 (see FIG. 1). The extension 208 may reflect light generated by the LED module 100.
The housing 206 is a housing that houses the LED module 100, the substrate 500, the fixing member 202, and the extension 208. The housing 206 has an opening on the front surface, and holds the lens 204 in the opening. The housing 206 may further transfer heat received from the LED module 100 via the substrate 500 and the fixing member 202 to the heat dissipation member 24 (see FIG. 1) and / or the extension reflector 28 (see FIG. 1). Thereby, the LED module 100 can be radiated appropriately.
The lens 204 is an example of an optical member used for the vehicular lamp 10. The lens 204 forms at least a part of the light distribution pattern by projecting the shape of the light emitting region of the semiconductor light emitting element 102 to the front of the vehicle. In this example, the lens 204 has a focal point F on the center of the light emitting region. The lens 204 projects the shape of the light emitting area onto a position where a hot zone (high luminous intensity area) in the light distribution pattern is to be formed, for example. The lens 204 may irradiate the light generated by the LED module 100 to the outside of the vehicular lamp 10.
Here, in this example, the fixing member 202 is provided at a position where the relative position to the lens 204 is known, and the substrate 500 is fixed to a predetermined position with high accuracy by the groove 904. In addition, the substrate 500 fixes the LED module 100 at a predetermined position with high accuracy by the groove 804. Thereby, the substrate 500 fixes the LED module 100 at a reference position whose relative position to the lens 204 is known. Therefore, according to this example, the LED module 100 can be fixed to the lens 204 with high accuracy. Moreover, thereby, a light distribution pattern can be appropriately formed with high accuracy. The focal point F is an example of an optical center for the optical member used in the light source unit 20. The optical center is an example of a design reference point for the optical member. In another example, the substrate 500 and the fixing member 202 may be integrally formed by, for example, one member.
5, 6, and 7 show an example of the configuration of the LED module 100. FIG. 5 is a CC cross-sectional view of the LED module 100. FIG. 6 is an AA cross-sectional view of the LED module 100. FIG. 7 is a BB cross-sectional view of the LED module 100. The LED module 100 includes a semiconductor light emitting element 102, a sealing member 108, a plurality of electrodes 104, a submount 702, a plurality of bonding wires 312, and a holding unit 708.
The semiconductor light emitting element 102 is a light emitting diode element. For example, the phosphor provided on the surface is irradiated with blue light to generate yellow light that is a complementary color of blue light. In this case, the LED module 100 generates white light based on blue light and yellow light generated by the semiconductor light emitting element 102 and the phosphor, respectively. In another example, the semiconductor light emitting device 102 may generate white light in the phosphor by irradiating the phosphor with ultraviolet light.
In this example, the semiconductor light emitting element 102 generates light from the surface facing the sealing member 108. This surface is a surface facing the lens 204 (see FIG. 3) when the LED module 100 is fixed to the light source unit 20 (see FIG. 3). For example, the semiconductor light emitting element 102 generates light using substantially the entire surface as a light emitting region. The semiconductor light emitting element 102 is an example of a planar light source that generates light from a planar light emitting region having a spread.
In this example, the light emitting region of the semiconductor light emitting device 102 is a substantially square surrounded by four straight sides 310a to 310d. Sides 310a to 310d are sides of the surface of the semiconductor light emitting element 102 facing the sealing member 108. The sides 310a to 310d may be sides whose relative positions with respect to the center O of the light emitting region are known. Further, the length L of each side 310 may be about 1 mm, for example. In this example, the lens 204 has a focal point F on the center O of the light emitting region. In this case, the lens 204 can project the shape of the light emitting region with high accuracy. The semiconductor light emitting element 102 may further generate light from, for example, an end face connected to the surface of the semiconductor light emitting element 102 with each of the sides 310a to 310d interposed therebetween.
Here, the center O of the light emitting region is, for example, the center of symmetry in the shape of the light emitting region. The center O may be a center of a substantially square surrounded by the four sides 310a to 310d, a center of a circumscribed circle of the substantially square, or the like. The center O may be, for example, a point on a perpendicular bisector of any side 310. The lens 204 forms a light distribution pattern based on the shape of the light emitting region that is symmetric with respect to the center O. In this case, this light distribution pattern has a symmetry corresponding to the symmetry of the shape of the light emitting region.
The sealing member 108 is a mold for sealing the semiconductor light emitting element 102, and is formed of a material that transmits white light generated by the semiconductor light emitting element 102, such as a translucent resin. In this example, at least a part of the sealing member 108 is hemispherical. In this case, the LED module 100 has, for example, an optical axis that passes through the center of the hemisphere and is perpendicular to the surface of the semiconductor light emitting element 102.
The plurality of electrodes 104 are electrically connected to the substrate 500 (see FIG. 3), and power supplied from the outside of the light source unit 20 via the substrate 500 and the cable 22 (see FIG. 3) is supplied to the bonding wire 312 and the sub-wires. The light is supplied to the semiconductor light emitting element 102 via the mount 702. The plurality of bonding wires 312 electrically connect the plurality of electrodes 104 and the submount 702.
The submount 702 is a plate-like body made of, for example, silicon, and fixes the semiconductor light emitting element 102 by placing it on the upper surface. The submount 702 includes wiring that electrically connects the bonding wire 312 and the semiconductor light emitting element 102, and supplies power received from the outside of the LED module 100 via the bonding wire 312 to the semiconductor light emitting element 102.
The holding unit 708 includes a slug 704 and a body 706. The slag 704 fixes the semiconductor light emitting element 102 at a predetermined position by placing the submount 702 on the upper surface and fixing it. For example, the slag 704 fixes the semiconductor light emitting element 102 by aligning the center O of the light emitting region with the optical axis of the LED module 100. In addition, at least a part of the slag 704 is formed of a material having a higher thermal conductivity than air, such as metal, and transmits heat generated by the semiconductor light emitting element 102 to the outside of the LED module 100.
The body 706 is formed so as to cover the outer periphery of the slag 704 with, for example, resin. Further, the body 706 fixes the electrodes 104 by accommodating a part of each of the plurality of electrodes 104.
In this example, the body 706 includes a plurality of sides 402a-d. The plurality of sides 402 a to 402 d is an example of a reference portion that indicates the position of the semiconductor light emitting element 102. At least some of the plurality of sides 402 a to 402 d may be one side of the holding unit 708. In addition, when the LED module 100 is fixed to the substrate 500, at least a part of the plurality of sides 402a to 402d is fixed according to the reference position on the substrate 500.
The body 706 is fixed to the slag 704. Accordingly, the holding unit 708 holds the semiconductor light emitting element 102 by aligning the center O of the light emitting region in the semiconductor light emitting element 102 with a position whose relative position with respect to the sides 402a to 402d is known. In this case, the plurality of sides 402a to 402d are sides whose relative positions with respect to the center O are known. In another example, the holding unit 708 may hold the semiconductor light emitting element 102 by, for example, aligning any of the sides 310a to 310d with a position whose relative position with respect to the sides 402a to 402d is known. Also in this case, since the relative positions of the sides 310a to 310d with respect to the center O are known, the sides 402a to 402d are sides whose relative positions with respect to the center O are known.
According to this example, for example, by fixing the LED module 100 with reference to at least a part of the sides 402a to 402d, the center O of the light emitting region in the semiconductor light emitting element 102 is set to a predetermined reference position. Can be fixed with high accuracy. In addition, as described with reference to FIGS. 3 and 4, in this example, the LED module 100 is fixed with high accuracy to a reference position whose relative position with respect to the lens 204 is known. Therefore, according to this example, the center O of the light emitting area can be aligned and fixed with respect to the lens 204 with high accuracy. According to this example, the light distribution pattern can be appropriately formed.
Hereinafter, the dimensions of the LED module 100 will be described in more detail. In this example, the holding unit 708 fixes the semiconductor light emitting element 102 on the submount 702 with reference to the center O of the light emitting region. The semiconductor light emitting element 102 is installed on the slag 704 and the submount 702 using, for example, an image processing technique that detects a relative position with respect to the slag 704. Thereby, the semiconductor light emitting element 102 can be aligned and fixed with high accuracy.
For example, the holding unit 708 fixes the semiconductor light emitting element 102 so that the distance between the center O and the side 402c is a predetermined distance Y1. Here, the distance between the center O and the side 402c is, for example, the distance between the projected images when the center O and the side 402c are projected on a plane parallel to the surface of the semiconductor light emitting element 102. .
The holding unit 708 fixes the semiconductor light emitting element 102 by matching the distance between the center O and the side 402c with an accuracy that causes a position error smaller than 0.05% of the length L of one side of the semiconductor light emitting element 102. Is preferred. In this case, a light distribution pattern can be formed appropriately. Further, it is more preferable that the holding portion 708 fixes the semiconductor light emitting element 102 with an accuracy that causes a position error smaller than 0.01% of the length L. In this case, the light distribution pattern can be formed more appropriately. For example, the holding unit 708 may fix the semiconductor light emitting element 102 with an accuracy that results in a position error smaller than 0.01 μm.
In another example, the holding unit 708 may fix the semiconductor light emitting element 102 so that the distance between the center O and the side 402d is a predetermined distance Y2. In addition, the holding unit 708 may fix the semiconductor light emitting element 102 so that the distance between the side 310c or the side 310d and the side 402c or the side 402d is a predetermined distance Y3 or Y4. Also in this case, the semiconductor light emitting element 102 can be fixed by aligning the center O with a predetermined position. Note that the side 310 c is the opposite side of the side 310 d on the surface of the semiconductor light emitting element 102. The side 402c is a side facing the side 402d with the semiconductor light emitting element 102 interposed therebetween.
In this example, the holding unit 708 further fixes the semiconductor light emitting element 102 so that the distance between the center O and the side 402b is a predetermined distance X1. In another example, the holding unit 708 may fix the semiconductor light emitting element 102 so that the distance between the center O and the side 402a is a predetermined distance X2. The holding unit 708 may fix the semiconductor light emitting element 102 so that the distance between the side 310b or the side 310a and the side 402b or the side 402a is a predetermined distance X3 or X4.
The holding unit 708 fixes the semiconductor light emitting element 102 so that the distance between the surface of the semiconductor light emitting element 102 and the lower surface of the body 706 is a predetermined distance Z1. The lower surface of the body 706 is, for example, a surface that includes at least a part of the plurality of sides 402 a to 402 d and is parallel to the surface of the semiconductor light emitting element 102. In another example, the holding unit 708 may fix the semiconductor light emitting element 102 so that the distance between the surface of the semiconductor light emitting element 102 and the lower surface of the slag 704 is a predetermined distance Z2. According to this example, the semiconductor light emitting element 102 can be appropriately fixed.
FIG. 8 shows an example of the configuration of the substrate 500 together with the LED module 100. In this example, the substrate 500 includes a plurality of pads 504 and 506 and a groove 804.
The plurality of pads 506 are connected to the plurality of electrodes 104 of the LED module 100 by, for example, soldering. The plurality of pads 504 are connected to the cable 22 by, for example, soldering, and are electrically connected to the plurality of pads 506 by, for example, printed wiring formed on the surface or inside of the substrate 500. Thereby, the board | substrate 500 electrically connects the cable 22 and the LED module 100. FIG.
The groove 804 fixes the LED module 100 by accommodating a part of the holding portion 708. In this example, the groove 804 has a plurality of sides 502a to 502c. The plurality of sides 502 a to 502 c are examples of reference sides that indicate reference positions where the LED module 100 should be attached. The groove 804 fixes the LED module 100 to the reference position by contacting the outer surface of the holding portion 708 including each of the sides 402a to c with the inner wall surface including each of the sides 502a to 502c. The substrate 500 may fix the LED module 100 by aligning the sides 402a to 402c with the reference position. According to this example, the LED module 100 can be fixed with high accuracy. Thereby, the semiconductor light emitting device 102 can be fixed with high accuracy.
The substrate 500 has sides 802a to 802d on the side surfaces, and is fixed to the fixing member 202 (see FIG. 3) with at least a part of the sides 802a to 802d as a reference. The fixing member 202 fixes the substrate 500 by, for example, contacting the side surface of the substrate 500 including each of the sides 802a to 802c with the inner wall surface of the groove 904 (see FIG. 3). In this case, the fixing member 202 can fix the substrate 500 with high accuracy. Therefore, according to this example, for example, the LED module 100 can be fixed with high accuracy at a reference position whose relative position with respect to the lens 204 (see FIG. 3) is known. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern.
FIG. 9 is a conceptual diagram showing an example of a light distribution pattern 300 formed by the vehicular lamp 10 (see FIG. 1). The light distribution pattern 300 is a low beam light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the vehicular lamp 10. In this example, the vehicular lamp 10 includes a horizontal cut line 302 that defines a light / dark boundary in a substantially horizontal direction, and a diagonal cut line 304 that defines a light / dark boundary in a predetermined diagonal direction that forms an angle of about 15 ° with respect to the horizontal direction. The light distribution pattern 300 is formed.
In this example, the vehicular lamp 10 includes a plurality of light source units 20 having different light distribution characteristics, and forms a light distribution pattern 300 based on light generated by each light source unit 20. In this case, each light source unit 20 forms a partial region in the light distribution pattern 300. For example, the light source unit 20 described with reference to FIGS. 3 and 4 forms a partial region 306 of the light distribution pattern 300.
Hereinafter, the light distribution characteristics of the light source unit 20 described with reference to FIGS. 3 and 4 will be described in more detail. In this example, the lens 204 in the light source unit 20 has a focal point F on the center O of the light emitting region of the semiconductor light emitting element 102. Therefore, the lens 204 projects the shape of the light emitting region of the semiconductor light emitting element 102 to the front of the vehicle by irradiating the light generated by the semiconductor light emitting element 102 to the front, thereby forming the region 306. The lens 204 forms the region 306 at a position where a hot zone is to be formed in the light distribution pattern 300.
Here, in this example, the LED module 100 uses the side 402 (see FIG. 8) aligned with the center O of the light emitting region of the semiconductor light emitting element 102, and at a predetermined reference position with high accuracy. It is fixed. Therefore, the center O is aligned with the lens 204 with high accuracy. In this case, the lens 204 can project the shape of the light emitting area onto the area 306 with high accuracy. Therefore, according to this example, it is possible to appropriately form a light distribution pattern.
In another example, the lens 204 may form the region 306 such that the edge of the region 306 coincides with the horizontal cut line 302 or the oblique cut line 304. In this case, the lens 204 may form a horizontal cut line 302 or an oblique cut line 304 based on the shape of the edge of the light emitting region in the semiconductor light emitting element 102. The lens 204 may form the region 306 so that a part of the edge of the region 306 coincides with a part of the horizontal cut line 302 or the oblique cut line 304.
FIG. 10 is a vertical sectional view showing another example of the configuration of the light source unit 20. Except for the points described below, the configuration in FIG. 10 given the same reference numerals as in FIG. 3 and / or FIG. 4 has the same or similar function as the configuration in FIG. 3 and / or FIG. Omitted.
In this example, the light source unit 20 includes a cover 252, an LED module 100, a substrate 500, a fixing member 202, a reflecting mirror 256, and a housing 206. The cover 252 is formed on the front surface of the light source unit 20 in a transparent shape, for example, with a material that transmits light generated by the semiconductor light emitting element 102.
The fixing member 202 is placed on the lower surface of the light source unit 20 with the surface facing upward. The fixing member 202 is fixed at a position where the relative position with respect to the reflecting mirror 256 is known. Further, the fixing member 202 fixes the substrate 500 by a groove 904 provided on the upper surface. The substrate 500 fixes the LED module 100 by a groove 804 provided on the upper surface. As a result, the substrate 500 fixes the LED module 100 at a reference position whose relative position with respect to the reflecting mirror 256 is known.
Here, for example, the reference position is determined in advance such that the relative position of the reflecting mirror 256 to the optical center F is known. The optical center F is a design reference point for the reflecting mirror 256, for example. In this example, the substrate 500 fixes the LED module 100 with the center of the light emitting region of the semiconductor light emitting element 102 aligned with the optical center F.
The reflecting mirror 256 is formed so as to cover the LED module 100 from the rear of the vehicle. The reflector 256 forms at least a part of the light distribution pattern of the vehicular lamp 10 (see FIG. 1) by reflecting the light generated by the semiconductor light emitting element 102 to the front of the vehicle. The reflecting mirror 256 is an example of an optical member used in the vehicular lamp 10.
Note that at least a part of the reflecting mirror 256 is formed in a paraboloid, for example. This paraboloidal portion reflects, for example, light incident from the optical center F as light traveling straight ahead of the vehicle. The reflecting mirror 256 may reflect the reflected light as diffused light for forming a light distribution pattern. The reflecting mirror 256 may irradiate reflected light, for example, to a hot zone.
FIG. 11 is a conceptual diagram illustrating an example of the light distribution pattern 300. Except for the points described below, in FIG. 11, the components denoted by the same reference numerals as those in FIG. 9 have the same or similar functions as those in FIG. In this example, the vehicular lamp 10 (see FIG. 1) forms a light distribution pattern 300. The light source unit 20 described with reference to FIG. 10 forms a partial region 306 of the light distribution pattern 300. The light source unit 20 forms the region 306 below the horizontal cut line 302 and the oblique cut line 304.
Here, for example, if the accuracy of fixing the LED module 100 is inappropriate, the light source unit 20 forms a part of the region 306 above the horizontal cut line 302 or the oblique cut line 304. There is a case. In this case, since the horizontal cut line 302 or the oblique cut line 304 is unclear, the vehicle lamp 10 may not be able to form the light distribution pattern 300 appropriately.
However, in this example, the LED module 100 is fixed so that the center of the light emitting region of the semiconductor light emitting element 102 and the optical center F of the reflecting mirror 256 are aligned. Therefore, according to this example, the region 306 can be formed with high accuracy. According to this example, the light distribution pattern can be appropriately formed.
FIG. 12 shows another example of the configuration of the LED module 100. FIG. 12A shows the LED module 100. FIG. 12B shows in detail the plurality of semiconductor light emitting elements 102 in the LED module 100. Except for the points described below, in FIG. 12, the configurations given the same reference numerals as those in FIGS. 5, 6, and / or 7 are the same as those in FIGS. 5, 6, and / or 7. The description is omitted because it has the same function. The LED module 100 of this example is used for the light source unit 20 described with reference to FIGS. 3 and 4, for example. The LED module 100 may be used in the light source unit 20 described with reference to FIG.
In this example, the LED module 100 includes a plurality of semiconductor light emitting elements 102. The plurality of semiconductor light emitting elements 102 are arranged side by side in a substantially square region surrounded by virtual line segments 320a to 320d. Line segments 320a to 320d are, for example, part of an envelope including one side of each of the plurality of adjacent semiconductor light emitting elements 102.
In addition, the holding unit 708 fixes the plurality of semiconductor light emitting elements 102 by matching the distances between the centers O of the light emitting regions of the plurality of semiconductor light emitting elements 102 and at least some of the plurality of sides 402a to 402d. For example, the holding unit 708 fixes the plurality of semiconductor light emitting elements 102 so that the distance between the center O and the side 402d is the distance Y2. The holding portion 708 may fix the plurality of semiconductor light emitting elements 102 by further matching the distance between the center O and any one of the sides 402b to 402d. According to this example, the plurality of semiconductor light emitting elements 102 can be appropriately fixed.
In addition, the light emission area | region with respect to the several semiconductor light-emitting device 102 is an area | region including each light emission area | region of the several semiconductor light-emitting device 102, for example, is an area | region enclosed by the line segments 320a-d. The center O in the light emitting region of the plurality of semiconductor light emitting elements 102 is, for example, the center of symmetry in the light emitting region with respect to the plurality of semiconductor light emitting elements 102. The center O may be the center of gravity of the light emitting region. In this case, the light source unit 20 (see FIG. 3) may form at least a part of the light distribution pattern by projecting the shape of the light emitting region that is symmetric with respect to the center O. A part of this light distribution pattern has symmetry according to the symmetry of the light emitting region, for example.
In another example, the center O may be a point on a line segment extending between the plurality of semiconductor light emitting elements 102, such as the line segments 322a and 322b indicated by dotted lines in FIG. In this case, the light source unit 20 forms at least a part of the light distribution pattern based on, for example, the shape of the light emitting region that is symmetric with respect to the line segment 322.
Here, in this example, the lens 204 (see FIG. 3) has a focal point F on the center O. In this case, the lens 204 can project the shape of the light emitting region of the plurality of semiconductor light emitting elements 102 with high accuracy in front of the vehicle. Therefore, according to this example, the light distribution pattern can be appropriately formed.
13, FIG. 14, and FIG. 15 show still another example of the configuration of the LED module 100. FIG. FIG. 13 is an AA cross-sectional view of the LED module 100. FIG. 14 is a BB sectional view of the LED module 100. FIG. 15 is a bottom view of the LED module 100. Except for the points described below, the configurations in FIG. 13, FIG. 14, and FIG. 15 that have the same reference numerals as those in FIG. 5, FIG. 6, and / or FIG. Since it has the same or similar function as the configuration in FIG.
In this example, the body 706 includes a slag housing portion 952 and an extending portion 954. The slag housing portion 952 is formed so as to cover the outer periphery of the slag 704. Thereby, the slag accommodating part 952 accommodates and fixes the slag 704.
The extending portion 954 is formed by extending further downward from the lower end of the slag housing portion 952. Here, the downward direction is, for example, a direction from the apex of the hemispherical sealing member 108 toward the center of the hemisphere. In addition, the extending portion 954 has a substantially square hole that is recessed in a direction perpendicular to the surface of the semiconductor light emitting element 102 on the lower surface. This hole has a plurality of sides 402a to 402d in at least a part of the inner wall surface. The sides 402 a to d are an example of a reference portion that indicates the position of the semiconductor light emitting element 102. The plurality of sides 402a to 402d may be sides of the inner wall surface of the hole in the holding unit 708.
Note that the plurality of sides 402 a to 402 d may be formed on a single plane parallel to the surface of the semiconductor light emitting element 102. The slag accommodating portion 952 and the extending portion 954 may be formed with the plane as a boundary.
Further, in this example, the holding unit 708 fixes the semiconductor light emitting element 102 by aligning the center O of the light emitting region of the semiconductor light emitting element 102 with a position whose relative position to the sides 402a to 402d is known, for example. For example, the holding unit 708 fixes the semiconductor light emitting element 102 such that the distance between the center O and the side 402d is Y2, and the distance between the center O and the side 402b is X1. The holding unit 708 may hold the plurality of semiconductor light emitting elements 102 by matching the distance between the center O and any one of the sides 402a to 402d.
In addition, the holding unit 708 fixes the semiconductor light emitting element 102 so that the distance between the surface of the semiconductor light emitting element 102 and the surface including the plurality of sides 402a to 402d is Z1. Also in this case, the semiconductor light emitting element 102 can be fixed with high accuracy. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern. The holding portion 708 may fix the semiconductor light emitting element 102 so that the distance between the surface of the semiconductor light emitting element 102 and the lower end of the extending portion 954 is a predetermined distance Z3.
FIG. 16 shows another example of the configuration of the substrate 500 together with the LED module 100 described with reference to FIGS. 13, 14, and 15. Except for the points described below, in FIG. 16, the components denoted by the same reference numerals as those in FIG. 8 have the same or similar functions as those in FIG.
In this example, the substrate 500 has a plurality of convex portions 510 and 512 that protrude in a direction toward the LED module 100. The plurality of convex portions 510 and 512 are accommodated in the holes in the holding portion 708 so that the LED module 100 is aligned with the reference position. The convex portion 510 has a plurality of sides 502 a to 502 d corresponding to the plurality of sides 402 a to d on the upper surface that should face the LED module 100. The plurality of sides 502a to 502d are an example of a reference side indicating a reference position where the LED module 100 should be attached. This reference position is a position at which the relative position with respect to the lens 204 (see FIG. 3) becomes known when the fixing member 202 (see FIG. 3) fixes the substrate 500, for example.
The convex portion 510 fixes the LED module 100 at the reference position by contacting the inner wall surface of the holding portion 708 including each of the sides 402a to d by the side surfaces including the sides 502a to 502d. Therefore, according to this example, the LED module 100 can be fixed with high accuracy.
The convex portion 512 is formed to further protrude from the upper surface of the convex portion 510. And when the board | substrate 500 fixes the LED module 100, the upper surface of the convex part 512 contacts the lower surface of the slag 704. FIG. Thereby, the convex portion 512 receives the heat generated by the semiconductor light emitting element 102 via the slag 704. According to this example, the LED module 100 can be appropriately fixed. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern.
17, 18, and 19 show still another example of the configuration of the LED module 100. FIG. 17 is a CC cross-sectional view of the LED module 100. FIG. 18 is an AA sectional view of the LED module 100. FIG. 19 is a BB cross-sectional view of the LED module 100. Except for the points described below, in FIG. 17, FIG. 18, and FIG. 19, the same reference numerals as those in FIG. 5, FIG. 6, and / or FIG. Since it has the same or similar function as the configuration in FIG.
In this example, the LED module 100 has a plurality of protrusions 452a and 45b. The protrusions 452a and 45b are formed to protrude downward from the lower surface of the holding portion 708. The protrusions 452a and b may protrude from the lower surface of the slag 704.
In addition, the holding unit 708 fixes the semiconductor light emitting element 102 by aligning the center O of the light emitting region of the semiconductor light emitting element 102 with a position whose relative position to the protrusions 452a and 45b is known. For example, the holding portion 708 fixes the semiconductor light emitting element 102 so that the distance between the center O and the protrusion 452a is Y2. The holding unit 708 may further fix the semiconductor light emitting element 102 so that the distance between the center O and the protrusion 452b is Y1. Also in this case, the semiconductor light emitting element 102 can be appropriately fixed with high accuracy. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern.
The protrusions 452a and 45b are an example of a reference portion that indicates the position of the semiconductor light emitting element 102. The distance between the center O and the protrusion 452 is, for example, between the projected images when the center O and the central axis of the protrusion 452 are projected on a plane parallel to the surface of the semiconductor light emitting element 102. Is the distance.
In addition, the holding unit 708 is configured such that, for example, the distance between the side 310b and a straight line connecting the plurality of protrusions 452a and 45b is X1, and the distance between the side 310a and the straight line is X2. May be fixed. Thereby, the position of the center O can be appropriately aligned with the direction perpendicular to the direction connecting the plurality of protrusions 452a and 45b. The distance between the side 310b or the side 310a and the straight line connecting the plurality of protrusions 452a and 45b is, for example, that the side 310b or the side 310a and the straight line are projected on a plane parallel to the surface of the semiconductor light emitting element 102. The distance between each projected image. In another example, the holding unit 708 may fix the semiconductor light emitting element 102 by matching the distances between the sides 310c and d and the protrusions 452a and 45b. Also in this case, the holding portion 708 can fix the semiconductor light emitting element 102 by appropriately aligning the center O.
FIG. 20 shows still another example of the configuration of the substrate 500 together with the LED module 100 described with reference to FIGS. 17, 18, and 19. Except for the points described below, in FIG. 20, the configuration denoted by the same reference numeral as in FIG. 8 has the same or similar function as the configuration in FIG.
In this example, the substrate 500 has a plurality of fitting portions 552a, b provided corresponding to the plurality of protrusions 452a, b. When the board | substrate 500 fixes the LED module 100, each of several fitting part 552a, b engages with each of several protrusion 452a, b. The fitting portions 552a and 552b are provided at a reference position where the LED module 100 should be fixed. This reference position is a position at which the relative position with respect to the lens 204 (see FIG. 3) becomes known when the fixing member 202 (see FIG. 3) fixes the substrate 500, for example. Thereby, the substrate 500 can fix the LED module 100 to the lens 204 with high accuracy.
Moreover, in this example, one fitting part 552b is fitted with the corresponding protrusion 452b while having play in the direction connecting the two fitting parts 552a and 552b. Further, the other fitting portion 552a is fitted with the corresponding protrusion 452a so that there is almost no play in the direction. Further, both the fitting parts 552a and 552 are fitted with the protrusions 452a and b so that there is almost no play in a direction perpendicular to the direction and parallel to the surface of the substrate 500. In this case, for example, the LED module 100 can be easily attached to the substrate 500 by fitting the protrusion 452a and the fitting portion 552a after fitting the tip of the protrusion 452b to the fitting portion 552b. According to this example, the LED module 100 can be appropriately fixed. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern.
In another example, the LED module 100 may have, for example, a hole formed in the holding portion 708 (see FIG. 19) instead of the protrusions 452a and 45b as the reference portion. In this case, the board | substrate 500 may have the protrusion which should be fitted with the said hole as the fitting parts 552a and b. Also in this case, the LED module 100 can be appropriately fixed. Further, the LED module 100 may have a hole formed in the holding portion 708 instead of one of the plurality of protrusions 452a and 452b. The board | substrate 500 may have the hole and protrusion which should be fitted with these as several fitting part 552a, b.
FIG. 21 shows still another example of the configuration of the LED module 100 and the substrate 500. Except for the points described below, in FIG. 21, the configurations given the same reference numerals as those in FIGS. 5 to 8 and 16 to 20 have the same or similar functions as the configurations in FIGS. 5 to 8 and FIGS. The description is omitted because it has.
In this example, the LED module 100 has a side 402 and a protrusion 452. The side 402 and the protrusion 452 are an example of a reference portion that indicates the position of the semiconductor light emitting element 102 (see FIG. 5).
Further, the substrate 500 has a convex portion 510 and a fitting portion 552. Further, the convex portion 510 includes a side 502. The side 502 and the fitting portion 552 indicate a reference position where the LED module 100 should be attached.
When the substrate 500 fixes the LED module 100, the convex portion 510 abuts the outer surface of the LED module 100 including the side 402 with the side surface including the side 502. Further, the fitting portion 552 engages with the protrusion 452. Also in this case, the substrate 500 can fix the LED module 100 with high accuracy. Therefore, also in this example, the vehicular lamp 10 (see FIG. 1) can appropriately form a light distribution pattern.
FIG. 22 shows still another example of the configuration of the LED module 100. Except for the points described below, in FIG. 22, the same reference numerals as those in FIGS. 5, 6, 7, and / or 12 are the same as those in FIGS. 5, 6, 7, and / or 12. The description is omitted because it has the same or similar function as the configuration.
In this example, the LED module 100 includes a plurality of semiconductor light emitting elements 102a to 102c. The plurality of semiconductor light emitting elements 102a to 102c are arranged at an interval of, for example, about 0.01 mm or less in a substantially square region surrounded by the virtual line segments 320a to 320d so that one side is aligned with the virtual line segment 320d. They are arranged side by side across d.
The holding unit 708 fixes the plurality of semiconductor light emitting elements 102a to 102c by matching the distance between the center O of the light emitting region of the central semiconductor light emitting element 102b and at least a part of the plurality of sides 402a to 402d. For example, the holding unit 708 fixes the plurality of semiconductor light emitting elements 102a to 102c such that the distance between the center O and the side 402d is the distance Y2. The holding portion 708 may fix the plurality of semiconductor light emitting elements 102 by further matching the distance between the center O and any one of the sides 402b to 402d. According to this example, the plurality of semiconductor light emitting elements 102a to 102c can be appropriately fixed. Thereby, the vehicular lamp 10 (see FIG. 1) can appropriately form the light distribution pattern.
1 is a perspective view of a vehicular lamp 10. FIG. 1 is a horizontal sectional view of a vehicular lamp 10. FIG. 3 is a vertical sectional view of the light source unit 20 along AA. FIG. 3 is a BB vertical sectional view of the light source unit 20. FIG. 2 is a CC cross-sectional view of the LED module 100. FIG. FIG. 3 is a cross-sectional view of the LED module 100 along AA. 3 is a BB cross-sectional view of the LED module 100. FIG. 5 is a diagram illustrating an example of a configuration of a substrate 500. FIG. 3 is a conceptual diagram illustrating an example of a light distribution pattern 300. FIG. FIG. 6 is a vertical sectional view showing another example of the configuration of the light source unit 20. 3 is a conceptual diagram illustrating an example of a light distribution pattern 300. FIG. FIG. 5 is a diagram illustrating another example of the configuration of the LED module 100. FIG. 3 is a cross-sectional view of the LED module 100 along AA. 3 is a BB cross-sectional view of the LED module 100. FIG. 2 is a bottom view of the LED module 100. FIG. It is a figure which shows the other example of a structure of the board | substrate 500. FIG. 2 is a CC cross-sectional view of the LED module 100. FIG. FIG. 3 is a cross-sectional view of the LED module 100 along AA. 3 is a BB cross-sectional view of the LED module 100. FIG. It is a figure which shows the further another example of a structure of the board | substrate 500. FIG. It is a figure which shows the further another example of a structure of the LED module 100 and the board | substrate 500. FIG. It is a figure which shows the further another example of a structure of the LED module.
DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp, 12 ... Cover, 14 ... Lamp body, 16 ... Circuit unit, 20 ... Light source unit, 22 ... Cable, 24 ... Heat radiation member, 26. ··· Cable, 28 ... Extension reflector, 100 ... LED module, 102 ... Semiconductor light emitting element, 104 ... Electrode, 108 ... Sealing member, 202 ... Fixing member, 204 ...・ Lens, 206 ... Housing, 208 ... Extension, 252 ... Cover, 256 ... Reflective mirror, 260 ... Reflective mirror, 300 ... Light distribution pattern, 302 ... Horizontal cut line 304 ... Diagonal cut line, 306 ... Area, 310 ... Side, 312 ... Bonding wire, 320 ... Line segment, 402 ... Side, 452 ... Projection 500 ... substrate, 502 ... side, 504 ... pad, 506 ... pad, 510 ... convex part, 512 ... convex part, 552 ... fitting part, 602 ... area , 604 ... area, 702 ... submount, 704 ... slug, 706 ... body, 708 ... holding part, 802 ... side, 804 ... groove, 902 ... side , 904 ... groove, 952 ... slag housing part, 954 ... extension part
A vehicular lamp used in a vehicle,
A light source module that generates light;
An optical member for irradiating the light generated by the light source module to the outside of the vehicular lamp;
A light source fixing part for fixing the light source module at a reference position whose relative position to the optical member is known;
The light source module is
When the light source module is fixed to the light source fixing part, a reference part fixed according to the reference position;
A semiconductor light emitting element for generating light from a predetermined light emitting region;
A vehicular lamp having a holding portion for holding the semiconductor light emitting element by aligning the center of the light emitting region with a position whose relative position to the reference portion is known.
The reference part is one side of the holding part,
The light source fixing portion has a reference side indicating the reference position, and a surface including the one side of the holding unit is brought into contact with a surface including the reference side, thereby causing the reference portion to move to the reference portion. The vehicular lamp according to claim 1, wherein the light source module is fixed in accordance with a position.
The reference part is a hole or a protrusion formed in the holding part,
2. The vehicular lamp according to claim 1, wherein the light source fixing portion has a fitting portion to be fitted with the reference portion that is the hole or the protrusion at the reference position.
The light source module has at least two reference parts,
The light source fixing part has at least two fitting parts to be fitted with each of the at least two reference parts.
4. The vehicular lamp according to claim 3, wherein one of the two fitting portions engages with the corresponding reference portion while having play in a direction connecting the two fitting portions.
The light source module includes the first reference portion that is the hole or the protrusion, and the second reference portion that is one side of the holding portion,
The light source fixing part further includes a reference side indicating the reference position, and the surface including the one side of the holding part is brought into contact with the surface including the reference side, thereby the reference part is The vehicular lamp according to claim 3, wherein the vehicular lamp is adjusted to a reference position.
A light source module for generating light,
When attaching the light source module to a predetermined reference position, a reference portion fixed according to the reference position;
A light source module comprising: a holding unit that holds the semiconductor light emitting element by aligning the center of the light emitting region with a position whose relative position to the reference unit is known.
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