Positioning structure for sheet-shaped component and display device using same

A liquid crystal panel is mounted in a frame. A positioning component for supporting the liquid crystal panel in a positioned state is attached to the frame using a screw component. A positioning protrusion is provided in the frame. A positioning hole portion into which the positioning protrusion can be inserted is provided in the positioning component. The positioning hole portion has a size such that, in a state in which the positioning protrusion is inserted therein, the positioning component can be moved in a direction in which a support surface of the positioning component approaches or moves away from the liquid crystal panel. A bracket surface that is substantially parallel with a direction in which the support surface of the positioning component approaches or moves away from liquid crystal panel is provided in the positioning protrusion.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a positioning structure for a sheet-shaped component, and a display device that includes the same.

2. Description of the Related Art

A liquid crystal display device that is one type of display device is broadly constructed by assembling a backlight device as an external light source on the rear side of a liquid crystal panel for displaying images. The liquid crystal panel is held in a state in which it is sandwiched between a frame-shaped bezel that surrounds the display region thereof and a frame that is one portion of the backlight device. When assembling the liquid crystal panel, after mounting the liquid crystal panel on the frame, the liquid crystal panel is placed into contact with the bezel from the front surface side and a screw is tightened.

In this assembly process, it is necessary to support the liquid crystal panel that is mounted on the frame in a positioned state with respect to the surface direction thereof. Consequently, positioning portions that are capable of supporting the outer peripheral end surface of the liquid crystal panel are provided in the frame. The positioning portions are disposed at locations corresponding to four sides of the outer peripheral end surface of the liquid crystal panel in the frame.

However, if all of the positioning portions are provided beforehand in the frame, a problem arises that the workability when placing the liquid crystal panel is unfavorable. Hence, a configuration could be considered in which a positioning portion corresponding to at least one side is provided as a separate member from the frame, and after mounting the liquid crystal panel by passing it through the place in the frame in which the positioning portion is not provided, a positioning component is attached as a separate member.

In this connection, the structure disclosed in Japanese Patent Laid Open No. 2001-209327 is known as an example of a structure in which a positioning component is provided as a separate member from a frame.

The following structure can be considered as a structure for fixing a positioning component when the positioning component is provided as a separate member to a frame as described above. Namely, a structure in which a through hole that allows a screw component to pass therethrough is provided in the positioning component and a screw hole for tightening the screw component is provided in the frame.

On the other hand, variations in the size of a liquid crystal panel may arise for each individual product within a range of tolerances. Hence, a structure can be considered in which a positioning protrusion is provided in the frame, while a positioning recess into which the positioning protrusion can be inserted is provided in the positioning component, and by making the positioning recess so as to have a rectangular shape, the mounting position of the positioning component can be adjusted in accordance with the size of the liquid crystal panel.

However, when the positioning recess is made to have a rectangular shape as described above, the following problem arises. That is, although the work of tightening the screw component is performed using an electric tool, since a clearance is provided to allow movement as described above between the positioning recess and the positioning protrusion, there is a concern that the positioning component will be rotated by the tightening force applied to the screw component.

SUMMARY OF THE INVENTION

In order to overcome the problems described above, preferred embodiments of the present invention control rotation of a positioning component accompanying tightening of a screw component.

A preferred embodiment of the present invention includes a bracket component on which a translucent sheet-shaped component is mounted, a positioning component that is attached to the bracket component and is capable of supporting the sheet-shaped component in a positioned state with respect to the surface direction thereof, and a screw component that is capable of fixing the positioning component by being tightened with respect to the bracket component, wherein a positioning protrusion is provided in one of the bracket component and the positioning component, while a positioning recess into which the positioning protrusion can be inserted is provided in the other of the bracket component and the positioning component, the positioning recess having a size such that, in a state in which the positioning protrusion is inserted into the positioning recess, the positioning component can be moved in a direction in which a support surface of the positioning component approaches or moves away from the sheet-shaped component, and wherein, a bracket surface is arranged on a peripheral surface of the positioning protrusion facing the positioning recess, the bracket surface being substantially parallel with the direction in which the support surface of the positioning component approaches or moves away from the sheet-shaped component.

By adopting this configuration, when the positioning component is attached after mounting the sheet-shaped component on the bracket component, in a state in which the positioning protrusion is inserted in the positioning recess, the attachment position of the positioning component with respect to the bracket component can be adjusted by moving the positioning component in a direction in which the support surface approaches or moves away from the sheet-shaped component. Thereafter, by tightening the screw component, the sheet-shaped component is supported in a positioned state by the positioning component.

Since the positioning recess has a size that allows movement of the positioning component in a state in which the positioning protrusion is inserted therein, there is a concern that the positioning component will rotate with respect to the bracket component accompanying tightening of the screw component. However, according to preferred embodiments of the present invention, because a bracket surface that is substantially parallel with a direction in which the support surface of the positioning component approaches or moves away from the sheet-shaped component is provided on a peripheral surface facing the positioning recess of the positioning protrusion, the angular range in which the positioning component rotates accompanying tightening of the screw component can be restricted to an extremely small range.

The following configurations are preferred embodiments of the present invention.

One configuration includes a pair of the bracket surfaces that are provided on a peripheral surface facing the positioning recess of the positioning protrusion. It is thereby possible to securely receive the tightening force of the screw component with the pair of bracket surfaces.

Another configuration includes the positioning protrusion and the positioning recess provided in respective pairs at positions that sandwich the screw component. It is thereby possible to securely receive the tightening force of the screw component with the pair of positioning protrusions and the pair of positioning recesses that are provided at positions sandwiching the screw component.

A further configuration includes the positioning protrusion having a substantially square shape. Production is thereby made simple in comparison to a case in which, for example, the positioning protrusion is formed in a shape such as a trapezoidal shape.

Another configuration uses a positioning structure for the sheet-shaped component in a display device.

According to the preferred embodiments of the present invention, rotation of a positioning component accompanying tightening of a screw component can be controlled.

Other features, elements, steps, characteristics and advantages of the present invention will be described below with reference to preferred embodiments thereof and the attached drawings.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Preferred embodiments of the present invention will now be described referring toFIG. 1toFIG. 10. According to the preferred embodiments, a liquid crystal display device10is described as one example of a display device.

As shown inFIG. 1, the liquid crystal display device10preferably includes a sheet-shaped liquid crystal panel11that is translucent, a backlight device12as an external light source that is disposed on the rear side thereof, and a substantially frame-shaped bezel13for holding the liquid crystal panel11. The liquid crystal panel11is configured to be received by a frame14that forms the backlight device12and to be held in a state in which it is sandwiched between the frame14and the bezel13that is fixed to the frame14from the front surface.

The backlight device12will now be described in detail. As shown inFIG. 2, the backlight device12preferably includes a metallic base15that defines a substantially rectangular box shape in which the top surface side as illustrated in the drawing is open, a plurality of optical sheets16(for example, four sheets including, in order from the bottom side inFIG. 2, a diffusing plate, a diffusing sheet, a lens sheet, and a brightness enhancing sheet) that are attached so as to cover the open portion of the base15, the frame14that can hold the optical sheets16in a state in which they are sandwiched between the frame14and the base15, and a plurality of cold cathode tubes17as lamps that are housed inside the base15. Each optical sheet16is a component for converting a substantially linear shaped light that is emitted from each cold cathode tube17into a sheet shape, and preferably is formed to have a substantially rectangular sheet shape that is larger than the display region of the liquid crystal display device10. The optical sheets16are configured so as to be stacked vertically as shown inFIG. 2and held in a state in which an outer peripheral margin portion that is outside the display region is sandwiched between an outer peripheral margin portion of the base15on the rear side and the frame-shaped frame14on the front surface side.

The liquid crystal panel11preferably includes a pair of glass substrates18, liquid crystal19that is filled between the two glass substrates18, and a pair of polarizing plates20that are affixed to the outer surfaces (surfaces on opposite sides to the liquid crystal19side) of the two glass substrates18. The two glass substrates18are pasted together in a state in which they face each other with a predetermined gap formed between them by a spacer. The liquid crystal19that is filled between the glass substrates18is surrounded by a sealing compound21. In the glass substrate18on the rear side, switching elements (for example, TFTs) that are connected to a source wiring and a gate wiring that are substantially perpendicular to each other are arranged in a state in which pixel electrodes of R, G, and B define a matrix configuration, respectively, on the glass substrate18on the front side. At an end of the glass substrate18on the rear side, one end side of a SOF22(system on film) is connected through an anisotropic conductive film (ACF) to the source wiring or the gate wiring, and a print substrate23is connected to the other end side of the SOF22. The print substrate23is fixed by a screw to a peripheral wall portion28of the frame14in a vertical posture in a manner causing the SOF22to bend.

To display an image on the liquid crystal panel11having the above described configuration, it is necessary to cause each cold cathode tube17of the backlight device12to transmit light, and also to drive each switching element by appropriately supplying signals to each wiring to thereby control the display state of the liquid crystal19. It is thereby possible to display a desired image on the liquid crystal panel11. Accordingly, the display region of the liquid crystal display device10is substantially equal to a region in which the switching elements or pixel electrodes are provided, and is a region that is located further on the inner side from the inner peripheral end surface of the bezel13or the frame14. The outer peripheral margin portion of the liquid crystal panel11, that is, a frame-shaped region that is located further on the outer side than the display region is a section that is required for fixing the liquid crystal panel11to the bezel13and the frame14.

The bezel13will now be described. As shown inFIG. 1, the overall structure of the bezel13preferably has a substantially rectangular frame shape, which is preferably formed by subjecting a metal plate to press molding or the like. The bezel13includes a holding portion24that is placed into contact with the front surface side of the liquid crystal panel11, and a peripheral wall portion25that projects in the downward direction as shown inFIG. 1from the outer peripheral end of the holding portion24and is disposed on the outer side of the peripheral wall portion28of the frame14. The cross section of the bezel13preferably is substantially L-shaped. Through holes26through which screws B for fixing the bezel13to the frame14can pass are provided in the holding portion24. The through holes26are preferably provided at, for example, three places on each of the long side sections of the holding portion24and preferably at two places on each of the short side sections thereof.

Next, the frame14including the backlight device12is described in detail. Similarly to the bezel13, the overall structure of the frame14preferably has a substantially rectangular frame shape, which is preferably formed by subjecting a metal plate to press molding or the like. The frame14includes a bracket portion27that receives the liquid crystal panel11, and the peripheral wall portion28that projects in the downward direction as shown inFIG. 1from the outer peripheral end of the bracket portion27and surrounds the outside of the peripheral wall portion of the base15. While the bracket portion27is preferably arranged substantially parallel to the surface direction of the liquid crystal panel11, the peripheral wall portion28is substantially perpendicular to the surface direction of the liquid crystal panel11. Screw holes29into which screws B for fixing the bezel13as described later can be screwed are provided in the bracket portion27. The screw holes29are preferably provided at, for example, three places on each of the long side sections27aof the bracket portion27and preferably at two places, for example, on each of the short side sections27bthereof.

As shown inFIG. 1,FIG. 2, andFIG. 5, in the bracket portion27of the frame14are provided positioning portions30that can position the liquid crystal panel11in the surface direction by supporting the outer peripheral end surfaces11aand11bof the mounted liquid crystal panel11. The positioning portions30are formed by cutting inward into one portion of the bracket portion27. The positioning portions30are arranged to protrude toward the liquid crystal panel11from the bracket surface with respect to the liquid crystal panel11of the bracket portion27and also face the outer peripheral end surfaces11aand11bof the liquid crystal panel11. An angle formed by the positioning portions30with respect to the bracket portion27is substantially 90 degrees.

The positioning portions30are provided on the two long side sections27aof the bracket portion27of the frame14and on the short side section27bon the left side of the bracket portion27as shown inFIG. 5. The positioning portions30can support three sides among the outer peripheral end surfaces11aand11bof the corresponding liquid crystal panel11, namely, the surfaces11aon the two long sides and the surface11bon the short side inFIG. 5. More specifically, a total of eight positioning portions30are preferably providing including, for example, three at locations with a predetermined clearance therebetween on each of the two long side sections27aof the bracket portion27, and two adjacent to the two end positions of the short side section27bof the left side inFIG. 5. Each of the positioning portions30on the two long side portions27ais arranged so as not to interact with the SOFs22of the liquid crystal panel11at the time of attachment. Buffer members31made of rubber or any other suitable elastic material are provided on the inner surface of each positioning portion30, i.e., on the surface facing the outer peripheral end surfaces11aand11bof the liquid crystal panel11. Since the liquid crystal panel11is supported by the positioning portions30via the elastically contractible buffer members31, it is difficult for the liquid crystal panel11to be damaged by shocks or the like.

Thus, a positioning portion30is not provided on the short side section27bon the right side shown inFIG. 5of the bracket portion27of the frame14. Accordingly, mounting the liquid crystal panel11in the frame14can be performed by sliding the liquid crystal panel11from the short side section27bside on the right side of the bracket portion27of the frame14as shown inFIG. 5. The direction for attaching the liquid crystal panel11matches the longitudinal direction of the liquid crystal display device10.

Positioning components32that are capable of supporting the surface11bon the right short side shown inFIG. 5among the outer peripheral end surfaces11aand11bof the liquid crystal panel11are attachable on the short side section27bon the right side of the bracket portion27. Similarly to the frame14, the positioning component32is formed by subjecting a metal plate to press molding or the like so that a cross section of its overall configuration substantially forms an L-shape. The positioning components32are configured to be attached in a pair near the two ends of the short side section27bon the right side of the bracket portion27. The positions of the pair of positioning components32are substantially the same as the two positioning portions30on the short side section27bon the left side. As described in detail later, the positioning components32are configured to be fixed in a mounted state with respect to the frame14by screw components37.

The positioning component32includes a main body portion33that is placed into contact with the bracket portion27and a support portion34that rises from the end edge of the main body portion33and is capable of supporting the outer peripheral end surface11bof the liquid crystal panel11. The main body portion33is substantially parallel with the bracket portion27(surface direction of the liquid crystal panel11), and the support portion34is substantially parallel with the positioning portion30. The main body portion33and the support portion34both preferably have the shape of a vertical rectangle along the length direction (a direction that is substantially perpendicular with the mounting direction of the liquid crystal panel11) of the short side sections27bof the bracket portion27. An angle formed by the main body portion33and the support portion34is substantially 90 degrees.

On the surface on the opposite side to the main body portion33side of the support portion34, i.e., the surface facing the outer peripheral end surface11bof the liquid crystal panel11, an elastically contractible buffer member35made of, for example, rubber is provided similarly to the positioning portion30. The surface on the opposite side to the support portion34side of the buffer member35is used as a support surface36with respect to the outer peripheral end surface of the liquid crystal panel.

Next, the mounting structure of the positioning component32with respect to the bracket portion27of the frame14is described in detail. The frame14is described first. A screw hole38into which a screw component37for fixing the positioning component32can be screwed is provided in the short side section27bon the right side as shown inFIG. 5of the bracket portion27of the frame14. Two screw holes38are arranged at positions corresponding to the mounting positions of the positioning components32(near both end positions in the short side section27b). The positioning protrusions39are provided in respective pairs at positions on the short side section27bthat sandwich the above described screw hole38. The two positioning protrusion39and the screw hole38are disposed in an aligned manner along the length direction of the bracket portion27or the positioning component32, and the center positions of each are arranged substantially collinear. The shape and the like of the positioning protrusions39are described in detail later.

A screw through-hole40through which a screw component37can pass is penetratingly formed at a center position in the length direction in the main body portion33of each positioning component32. The screw through hole40preferably has a substantially circular shape in which the diametrical dimensions are larger than the shank of the screw component37by a predetermined clearance amount. A pair of positioning hole portions41into which the positioning protrusions39on the frame14can be inserted are provided at positions sandwiching the screw through hole40in the main body portion33. The positioning hole portions41are disposed near positions at both ends of the main body portion33penetrate through the main body portion33. The two positioning hole portions41and the screw through hole40are arranged in an aligned manner along the length direction of the bracket portion27or the positioning component32, and the center positions of each are arranged substantially collinear with each other.

The positioning hole portion41preferably has a substantially rectangular shape elongated along the lateral direction, i.e., the longitudinal direction of the liquid crystal display device10(direction in which the support surface36of the positioning component32approaches or moves away from the liquid crystal panel11). Among the inner peripheral surfaces of the positioning hole portion41, a surface41aon the side of a long side (surface41afacing a bracket surface42described later) is substantially straight along the lateral direction, and a surface41bon the side of a short side is formed substantially straight along the vertical direction.

The dimensions in the vertical direction of the positioning hole portion41define a size that has a minimum clearance of a degree that allows insertion of the positioning protrusion39, while the dimensions in the lateral direction define a size with a predetermined clearance that are larger than the dimensions in the vertical direction. Accordingly, in a state in which the positioning protrusion39is inserted into the positioning hole portion41, it is possible to relatively move the positioning component32with respect to the frame14, and accompanying this movement the support surface36of the positioning component32approaches or moves away from the outer peripheral end surface11bof the liquid crystal panel11. A difference (clearance) between the dimensions in the lateral direction of the positioning protrusion39and the dimensions in the lateral direction of the positioning hole portion41are substantially the same as, or greater than, the tolerance range in the length dimension of the long side when manufacturing the liquid crystal panel11.

A clearance between the screw through hole40and the screw hole38(where the shank of screw component37is inserted) is about the same as the clearance in the lateral direction between the positioning protrusion39and the positioning hole portion41as described above. As a result, no matter what position the positioning component32is installed at, the screw through hole40definitely communicates with the screw hole38.

The positioning protrusion39will now be described in detail. The positioning protrusion39is made to protrude further to the side of the positioning component32than the abutting surface with respect to the positioning component32of the bracket portion27by knocking out the bracket portion27from the rear side. As shown inFIG. 5, the cross sectional shape of the positioning protrusion39defines a substantially square shape, and more specifically, defines a substantially square shape in which the dimensions in the vertical direction and the dimensions in the lateral direction are substantially the same. Among the outer peripheral surfaces (peripheral surfaces facing the positioning hole portion41) of the positioning protrusion39, the surface on the upper side and the surface on the lower side shown inFIG. 5, i.e., the surfaces along the lateral direction, are taken as bracket surfaces42with respect to the positioning hole portion41.

More specifically, the bracket surfaces42are provided in respective pairs on each positioning protrusion39, and face each other. The bracket surfaces42can regulate the rotational movement of the positioning component32by contacting the surfaces41aof the positioning hole portion41when the positioning component32attempts to rotate due to a tightening force generated when tightening the screw component37. The bracket surfaces42preferably have a shape that is substantially straight along the lateral direction and is substantially parallel with the surfaces41aof the positioning hole portion41. In other words, the bracket surfaces42are substantially parallel with a direction in which the support surface36of the positioning component32approaches or moves away from the liquid crystal panel11. Accordingly, in a state in which the positioning protrusion39is inserted inside the positioning hole portion41, a distance between the surfaces41aof the positioning hole portion41and the bracket surfaces42is substantially uniform across the full length thereof (FIG. 8).

The present preferred embodiment has the above described structure. The operation of the present preferred embodiment will now be described. After separately manufacturing the bezel13, the liquid crystal panel11, and the backlight device12, work is performed to assemble these components. First, work is performed to mount the liquid crystal panel11on the frame14of the backlight device12from the state shown in FIG.5. The liquid crystal panel11is inserted by sliding the liquid crystal panel11into the bracket portion27of the frame14from the right side as shown inFIG. 5(the side on which the positioning component32is attached later). At this time, the print substrate23is supported in an appropriate position so that the SOFs22do not interact with the positioning portions30.

As shown inFIG. 6, the liquid crystal panel11is pushed in as far as a depth at which the surface11bon the interior side in the installation direction (surface11bon the short side shown on the left in the figure) contacts against the buffer members31of the positioning portions30. In this state, because the buffer members31of the positioning portions30contact against three sides of the outer peripheral end surfaces11aand11bof the liquid crystal panel11, the liquid crystal panel11is supported in a positioned state from three directions. Even in a case in which the length dimensions of the short side of the liquid crystal panel11vary for each product, since the buffer members31of the positioning portions30that are disposed on the two long side sections27aof the bracket portions27can elastically contract, those variations can be absorbed.

Subsequently, work to attach the positioning component32to the frame14is performed. The main body portion33of the positioning component32is mounted on the bracket portion27while aligning the two positioning hole portions41with the two positioning protrusions39. At this time, as shown inFIG. 7, to achieve a state in which the support surface36is moved away from the opposing surface11bof the liquid crystal panel11(surface11bof the short side that is shown on the right in the figure), the positioning protrusion39is inserted at a position near the left side of the positioning hole portion41as shown in the figure. Thereafter, the positioning component32is moved toward the left side in the figure along the lateral direction, i.e., to the side approaching the liquid crystal panel11. This movement is allowed by the clearance between the positioning protrusion39and the positioning hole portion41.

Next, as shown inFIG. 8, the positioning component32is moved until the support surface36of the buffer member35contacts against the opposing surface11bof the liquid crystal panel11and the buffer member35elastically contracts to some degree. By moving the positioning component32in this manner, even in a case in which the length dimensions on the long side of the liquid crystal panel11vary for each product, the variations can be absorbed. At this time, the screw through hole40is in a state in which it communicates with the screw hole38.

Next, work is performed to tighten the screw component37using a tool such as an electric screwdriver. By screwing the screw component37into the screw hole38via the screw through hole40, as shown inFIG. 9, the positioning component32is fixed in a mounted state with respect to the frame14. In this connection, at the time of tightening a force acts via the screw component37to rotate the positioning component32in the tightening direction (counterclockwise rotation direction as shown inFIG. 9). Since the positioning hole portion41preferably has a shape that is elongated from side to side for positioning the positioning component32, there might be a concern that the positioning component32will rotate and become displaced accompanying the action of the aforementioned tightening force.

If a case is supposed in which a positioning protrusion is of a cross-sectional substantially circular shape, since the surfaces on the short side of the positioning hole portion will rotate until they contact against the positioning protrusion, the range of the rotational angle will become quite large. However, according to the present preferred embodiment, since a configuration is adopted in which the positioning protrusion39is provided with the bracket surfaces42that are substantially parallel with the direction of movement of the positioning component32, i.e., the direction in which the support surface36of the positioning component32approaches or moves away from the liquid crystal panel11, the bracket surfaces42contact against the opposing surfaces41aof the positioning hole portion41before the surfaces41bon the short side, and thus the rotational movement is controlled. This rotational movement is caused by a very small clearance in the vertical direction between the positioning protrusion39and the positioning hole portion41that is maintained to allow insertion, and the angular range thereof is minimal.

More specifically, when rotating the positioning component32, the surfaces41aopposing the positioning protrusion39of the positioning hole portion41change position in an arc in the counterclockwise rotation direction as shown inFIG. 9around the axial core position of the screw component37, and contact against the bracket surfaces42of the positioning protrusion39in a position that is inclined with respect to the lateral direction. The left side end portion of the bracket surface42on the upper side of the positioning protrusion39as shown inFIG. 9, and the right side end portion of the bracket surface42on the lower side, contact against the respective opposing surfaces41aof the positioning hole portion41that are inclined. In this connection, the long-dashed double short-dashed line shown inFIG. 9represents the state before rotation.

Although the positioning component32rotates by a very small amount owing to the aforementioned clearance, since a buffer member35is provided at the position of direct contact with the liquid crystal panel11, the positioning component32is held in a state in which it is in surface contact with the opposing surface11bof the liquid crystal panel11by the buffer member35elastically contracting.

By attaching two positioning components32to the frame14in this manner, as shown inFIG. 10, the liquid crystal panel11is supported in a positioned state from four sides by the positioning portions30and the positioning components32. Thereafter, by mounting the bezel13from the front surface side of the liquid crystal panel11and tightening the screws B, as shown inFIG. 3andFIG. 4, the liquid crystal panel11can be held in a state in which it is sandwiched between the frame14and the bezel13.

According to the present preferred embodiment as described above, since bracket surfaces42that are substantially parallel with a direction in which the support surface36of the positioning component32approaches or moves away from the liquid crystal panel11are formed in the positioning protrusion39, an angular range in which the positioning component32rotates accompanying tightening of the screw component37can be minimized to an extremely small range.

Further, since the bracket surfaces42are provided in a pair on the positioning protrusion39, the tightening force of the screw component37can be reliably received by the two bracket surfaces42. Furthermore, since the positioning protrusion39and the positioning hole portion41are provided as a pair in positions sandwiching the screw components37, the tightening force of the screw components37can be received more reliably.

Furthermore, since the positioning protrusion39preferably has a substantially square shape, the manufacture thereof is simple in comparison to a case in which, for example, the positioning protrusion is formed in a trapezoidal shape or the like.

Other Preferred Embodiments

The present invention is not limited to the preferred embodiments described by the foregoing descriptions and drawings. For example, the following preferred embodiments are also included in the technical scope of the present invention, and various modifications other than those described below may be made without departing from the spirit or scope of the inventive concept of the present invention.

The shape of the positioning protrusions may be one in which, for example, the cross-sectional shape is substantially triangular, substantially trapezoidal, or substantially oval, and in essence may be any shape as long as it has a surface that is substantially parallel with a direction in which the support surface of the positioning component approaches or moves away from the liquid crystal panel. Further, to facilitate insertion into the positioning hole portion, the positioning protrusion may have a tapered shape.

It is not always necessary that the shape of the bracket surface be straight along the lateral direction, and as long as the bracket surface is substantially parallel with a direction in which the support surface of the positioning component approaches or moves away from the liquid crystal panel, a structure in which, for example, the bracket surface forms a slight arc shape is also included in the present invention.

A configuration may be adopted in which, opposite to the configuration in the above described preferred embodiment, a positioning protrusion is provided on the positioning component side and a positioning hole portion is provided on the frame side.

Although according to the preferred embodiments described above, a structure is described in which a penetrating hole shape was exemplified as a “positioning recess”, a structure in which a “positioning recess” is a non-penetrating hollow shape is included in the present invention. Further, the shape of the positioning hole portion or the screw through hole can be arbitrarily changed.

The number or positions of the positioning protrusions and the positioning hole portions can be arbitrarily changed. The number of bracket surfaces can also be arbitrarily changed.

Although a liquid crystal panel was exemplified as a “sheet-shaped component” according to the above described preferred embodiment, the present invention can also be applied to a structure that positions an optical sheet of a backlight device with respect to a base.

Although a case in which a positioning component supports only one side of a liquid crystal panel was exemplified according to the above described preferred embodiments, a configuration may also be adopted in which positioning components support two or more sides.

Although a liquid crystal display device was exemplified as a “display device” according to the above described preferred embodiments, the present invention is also applicable to display devices other than a liquid crystal display device.