JP2012014951A - Support body, plane light source device equipped with support body, and electronic equipment equipped with plane light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify installation of a plate-shaped member such as a light guide body and realize thinning of a device equipped with the plate-shaped member.SOLUTION: Provided, one side in a parallel direction of light guide bodies 21', 21" is A-side, and the other side is B-side, the support body 31 is provided with a nail part 31a fixed to a base part 31e for gripping an end of the A-side in the light guide body 21', and a nail part 31b for gripping an end of the B-side in the light guide body 21' as against the adjacent light guide bodies 21', 21". A flexible part 31f elastically deforming in a vertical direction to a loading face of the light guide bodies 21', 21" is provided at a loading area of the light guide body 21" at the base part 31e, and the nail part 31b is coupled with the base part 31e through the flexible part 31f.

Description

  The present invention relates to a support for fixing a plurality of plate-like members (for example, light guides) provided in parallel with each other in the longitudinal direction, a surface light source device including the support, and a surface The present invention relates to an electronic device including a light source device. More specifically, a support that fixes a plurality of light guides provided with gaps in parallel with each other in the longitudinal direction, a surface light source device that includes the support, and an electronic device that includes the surface light source device About.

  In recent years, in order to reduce the thickness of a liquid crystal display device, a backlight including a side edge (also referred to as a sidelight) type light guide plate that emits light from a light source in a planar shape by a light guide plate is frequently used.

  For example, the backlight unit disclosed in Patent Document 1 includes at least one lamp that emits light, and at least one light diffusion plate 141 that is positioned above each lamp and diffuses light emitted from the lamp. I have.

  FIG. 9 is a perspective view showing the configuration of the backlight unit disclosed in the cited document 1, and shows a state in which the light diffusing plate 141 is attached to the lamp guide 130. As shown in FIG. 9, the light diffusing plate 141 is inserted and fixed in the guide groove 136 a of the light diffusing plate holder 132 formed in the lamp guide 130. The lamp is inserted into the opening of the lamp holder 131 from above, and the lamp is fixed by the elasticity of the lamp holder 131.

JP 2008-10390 A (published January 17, 2008)

  In recent years, liquid crystal display devices have been increasingly thinned, and with this thinning, for example, the interval between light guides in the backlight has become narrower. Specifically, it is necessary to assemble the backlight so that the distance between the light guides is in the range of about 1 mm to 2 mm.

  In the technique of the cited document 1, the two claw portions constituting the guide groove 136a of the light diffusion plate holder 132 are fixed with the light diffusion plate 141 sandwiched therebetween. At this time, a flexible force (elastic force) in the lateral direction (short direction of the light diffusion plate 141) is applied to the two claw portions. For this reason, when assembling a backlight in the range where the space | interval of the light diffusing plates 141 is about 1 mm-2 mm, the horizontal dimension in the light diffusing plate holder 132 is restrict | limited. For this reason, the light diffusing plate holder 132 has a configuration in which the dimension in the height direction is increased in order to provide a spring property (elastic force) sufficient to fix the light diffusing plate 141. As a result, the location where the light diffusing plate 141 is fixed by the guide groove 136a is increased, and it is difficult to reduce the thickness of the backlight unit. Further, since strong spring properties are imparted to the two claw portions constituting the guide groove 136a, it is difficult to insert the light diffusion plate 141 into the guide groove 136a.

  Therefore, when the technique of Cited Document 1 is applied to a technique for assembling a backlight in a range where the distance between the light guides is about 1 mm to 2 mm, it is difficult to reduce the thickness of the backlight.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to easily install a plate-like member such as a light guide, and to an apparatus (for example, a backlight) provided with the plate-like member. And a surface light source device including the support, and an electronic device including the surface light source device.

  In order to solve the above-described problem, the support of the present invention includes a base body having a mounting surface on which a plurality of plate-like members arranged adjacent to each other in the longitudinal direction are arranged in parallel, and the plate-like members are predetermined to each other. Of the plurality of plate-like members adjacent to each other when the one side in the parallel direction of the plate-like members is the first side and the other side is the second side. A first claw that is fixed to the base with respect to the first and second plate-like members and grips a first side end of the first plate-like member, and a second of the first plate-like member. And a flexible portion that elastically deforms in the direction perpendicular to the placement surface in the placement region of the second plate-like member on the base. The second claw portion is connected to the base via the flexible portion.

  According to said structure, the 1st nail | claw part which hold | grips the edge part of the 1st side in a 1st plate-shaped member with respect to adjacent 1st and 2nd plate-shaped members is fixed to the said base | substrate. On the other hand, the 2nd nail | claw part which hold | grips the edge part of the 2nd side in a 1st plate-shaped member is connected with the said base | substrate via the flexible part elastically deformed perpendicularly | vertically with respect to the said mounting surface. . For this reason, the second claw portion is displaced in a direction perpendicular to the placement surface by the elastic deformation of the flexible portion 31f.

  According to said structure, since the said flexible part is provided in the mounting area | region of the 2nd plate-shaped member in the said base | substrate, when the said 2nd plate-shaped member is mounted in the said base | substrate, The elastic deformation of the flexible portion is limited by the second plate member placed. As a result, according to the above configuration, if the second plate-like member is placed on the base body, the displacement (lifting) of the second claw portion is suppressed, so the first plate-like member The member is supported and fixed at a predetermined position by the first and second claws. That is, the first plate-like member is supported and fixed at a predetermined position by the elastic deformation of the flexible portion being suppressed by the second plate-like member.

  Thus, the support body of this invention becomes a structure by which a 2nd plate-shaped member suppresses the displacement (lifting) of the 2nd nail | claw part which hold | grips the edge part of the 2nd side in a 1st plate-shaped member. ing. For this reason, in order to give the 1st and 2nd nail | claw part the spring property which supports a 1st plate-shaped member, it is not necessary to give a strong spring property to the 1st and 2nd claw part itself. In said structure, the spring property which supports a 1st plate-shaped member can be provided to a 1st and 2nd nail | claw part by setting the flexible range of the said flexible part. For this reason, even if it is a case where the space | interval of plate-shaped members is assembled in the range of about 1 mm-2 mm, it is not necessary to take the dimension of the height direction (Z direction) of a 1st and 2nd nail | claw part, and the 1st The height of the location where the first plate-like member is fixed by the first and second claws can be reduced. That is, since the upper part of the first and second claw portions above the first plate-like member only needs to lock the upper surface of the first plate-like member, the protruding portion can be made smaller. Therefore, according to said structure, the protrusion part from the 1st plate-shaped member in a 1st and 2nd nail | claw part can be made small, and thickness reduction of an apparatus is realizable. In addition, since the first and second claw portions are not provided with strong spring properties, the first and second plate-like members can be easily installed on the support.

  As described above, according to the above configuration, it is possible to provide a support body in which the installation of the plate-like member is simple and the apparatus including the plate-like member can be thinned.

  Moreover, the support body of the present invention includes a third claw portion that holds the first-side end portion of the second plate member, and the third claw portion is the flexible portion of the base body. It is preferable to be fixed at a position closer to the second claw portion than the connecting portion.

  According to said structure, it is provided with the 3rd nail | claw part which hold | grips the edge part of the said 1st side in a said 2nd plate-shaped member, and the said 3rd nail | claw part is with the said flexible part in the said base | substrate. Since it is fixed at a position closer to the second claw portion than the connecting portion, the second plate-like member is surely supported and fixed to the placement region on the base. Therefore, according to said structure, the displacement (raising) of said 2nd nail | claw part is suppressed more. Therefore, according to the above configuration, the apparatus including the plate-like member can be thinned, and the first plate-like member can be more reliably supported and fixed at a predetermined position.

  Moreover, in the support body of the present invention, the plate-like members are formed with thin portions that are thinner than the center portion at both ends in the parallel direction, and the first and second claw portions are It is preferable to grip the thin portion of the first plate member.

  According to said structure, since the said 1st and 2nd nail | claw part hold | grips the thin part thinner than the center part formed in the both ends of the parallel direction in a plate-shaped member, a plate-shaped member It is possible to further reduce the thickness of the device provided with.

  Moreover, in the support body of this invention, it is preferable that the said plate-shaped member is a light guide.

  When the plate-like member is a light guide, it is possible to provide a support in which the light guide can be easily installed and the surface light source device can be thinned.

  Further, in order to solve the above-described problem, the surface light source device of the present invention includes a plurality of light guides provided with gaps in parallel with each other in the longitudinal direction, and the light guides are connected to each other in a predetermined manner. The above-mentioned support for supporting at intervals is provided.

  Accordingly, it is possible to provide a surface light source device in which the light guide is easily installed and is thinned.

  The present invention also includes an electronic device including the surface light source device.

  As described above, the support according to the present invention includes a base body having a mounting surface on which a plurality of plate-like members arranged adjacent to each other in the longitudinal direction are arranged in parallel, and supports the plate-like members at a predetermined interval. The first and second adjacent ones of the plurality of plate-like members when the one side in the parallel direction of the plate-like members is the first side and the other side is the second side. Two plate-like members, a first claw portion fixed to the base and gripping a first-side end portion of the first plate-like member, and a second-side end portion of the first plate-like member And a flexible portion that elastically deforms in the direction perpendicular to the placement surface is provided in the placement region of the second plate member in the base body, The second claw portion is connected to the base body via the flexible portion.

  In addition, as described above, the surface light source device of the present invention supports a plurality of light guides provided with gaps in parallel with each other in the longitudinal direction and the light guides at predetermined intervals. Therefore, the above-mentioned support body is provided.

  Moreover, the electronic device of this invention is the structure provided with the said surface light source device as mentioned above.

Therefore, for example, a plate-like member such as a light guide can be easily installed, and a device (for example, a backlight) including the plate-like member can be thinned, and a surface light source including the support apparatus,
And the electronic device provided with the surface light source device can be provided.

The structure of the support body with which the surface light source device (light source module) in one Embodiment of this invention was equipped is shown, (a) is sectional drawing which showed the structure of the support body roughly, (b) is a support body. It is the perspective view which showed only the structure of these. It is a disassembled perspective view which shows schematic structure of the liquid crystal display device in one Embodiment of this invention. It is sectional drawing which shows a part of structure in the said liquid crystal display device. It is a top view which shows the structure of the light-guide plate of the surface light source device (light source module) in one Embodiment of this invention. It is sectional drawing which shows one structural example of the light guide (plate-shaped member) which can be applied to the said support body, and shows the optical path in the edge part in the some light guide which has a defect | deletion part in the output side. The method of installing two light guides on the support is shown, (a) is a cross-sectional view schematically showing the process of supporting the light guide with two claws, and (b) It is sectional drawing which shows typically the state after supporting another light guide with these 2 nail | claw parts. It is a side view which shows another structure of the said support body, and shows the structure by which the latch member was provided in the surface (back surface) on the opposite side to the light guide mounting surface in a base part. It is sectional drawing which shows the other structural example of the light guide (plate-shaped member) which can be applied to the said support body, and shows the optical path in the edge part in the some light guide which has a defect | deletion part in the output side. It is a perspective view which shows the structure of the backlight unit disclosed by the cited reference 1, and shows the state by which the light diffusing plate was mounted | worn with the lamp guide.

  An embodiment of the present invention will be described as follows. In addition, this embodiment demonstrates the example which applied the light guide as a plate-shaped member supported by the support body of this invention. An example in which the surface light source device of the present invention is applied to a light source module in a liquid crystal display device as an electronic apparatus will be described. However, the present invention is not limited to these application examples. The support body of the present invention is not limited to the light guide body, and has the effects described below if the supporting member is a plate-like member.

  FIG. 2 is an exploded perspective view showing a schematic configuration of the liquid crystal display device 1. As shown in FIG. 2, the liquid crystal display device 1 includes a chassis 2, a light source module (surface light source device) 10, a liquid crystal panel 3, and a bezel 4 in order from the bottom. Among these, the light source module 10 (surface light source device) includes a reflection sheet 11 as a reflection plate, an LED (Light Emitting Diode) 12 and an LED substrate 13 as a light source, a reflector 14, a light guide plate 20, and a diffusion. A plate 15 and an optical sheet group 16 are provided. In the light source module 10, the reflection sheet 11 and the diffusion plate 15 are not essential components in the surface light source device of the present invention.

  The LED 12, the LED substrate 13, and the reflector 14 are provided at the end of the light guide plate 20 as shown in FIG. 3. As a result, the light from the LED 12 enters the one end surface 21a of the light guide plate 20, and the liquid crystal panel 3 is irradiated with light from the light exit surface 21d of the light guide plate 20 through the diffusion plate 15 and the optical sheet group 16. ing. Therefore, the light source module 10 of the present embodiment employs a side edge (also referred to as side light) method.

Incidentally, the liquid crystal display device 1 has a problem of blurring of moving images, as compared with a CRT (Cathode-Ray Tube) display device. That is, in the CRT display device, since there is a non-light emission period in which this pixel does not emit light between the light emission period of the pixel in a certain frame and the light emission period of this pixel in the next frame, there is little afterimage feeling. On the other hand, since the display method of the liquid crystal display device 1 is a “hold type” that does not have such a non-light emitting period, an afterimage feeling is generated, and this afterimage feeling is recognized by the user as blurring of a moving image.

  Therefore, in the backlight type liquid crystal display device 1 according to the present embodiment, the light source module 10 which is a backlight is divided and sequentially turned off in synchronization with the timing of applying the video signal to the liquid crystal panel 3. Backlight blinking, which is a technique for inserting a black display between display and image display, has been proposed. Thereby, pseudo-impulse type display can be realized, and afterimage feeling can be suppressed.

  In the light source module 10 of the present embodiment, in order to perform this backlight blinking, the light guide plate 20 is divided into a plurality of light guides (a plurality of plate-like members) 21 as shown in FIG. . The plurality of light guides 21 are arranged in parallel to the longitudinal direction so as to have a gap 22 between the adjacent light guides 21. Therefore, in this embodiment, as shown in FIG. 3, the LED 12 is configured to make light incident from a later-described thick portion 21 c on one end face 21 a in the longitudinal direction of each light guide 21. It is not necessarily limited to one end surface 21a, but may be incident from the other end surface in the longitudinal direction, and light may be incident from both one end surface 21a and the other end surface. That is, in the present invention, it is sufficient that light is incident from at least one end face 21a.

  By the way, when the light guide plate 20 is divided into a plurality of light guides 21 and arranged in parallel in the longitudinal direction, the thermal expansion and manufacturing tolerances of the light guides 21 are taken into account, and the gaps between the light guides 21 are also considered. In order to avoid the occurrence of luminance unevenness due to the above, the gap 22 needs to be about 3 mm, more preferably about 1 to 2 mm. Further, if the plurality of light guides 21 are simply arranged without being fixed, each light guide 21 is displaced from a predetermined position, luminance unevenness is generated, and pseudo-impulse display can be appropriately performed. It becomes difficult. For this reason, in the light source module 10 of the present embodiment, as shown in FIG. 2, a support body 31 that supports each light guide body 21 at a predetermined position is provided. A plurality of the supports 31 are arranged below the light guide plate 20 (on the side opposite to the light emitting side of the light guide plate 20).

  Here, the structure of the light guide 21 that can be applied to the support 31 of the present embodiment will be described with reference to FIGS. 5 and 8.

  First, the light guide 21 may have a configuration shown in FIG. In the configuration shown in FIG. 8, in the cross section orthogonal to the longitudinal direction of the light guide 21, a uniform thickness (the length from the light emitting surface of the light guide 21 to the surface opposite to the surface) (see FIG. 8). Two light guides 21 having 5 mm are adjacent to each other. A light scatterer 23 is provided on the surface of the light guide 21 opposite to the light exit surface. On the other hand, a diffusion plate 15 having a function of diffusing light is provided at a position having a predetermined interval (2 mm in FIG. 8) on the light emitting surface side of the light guide 21. In the configuration of FIG. 8, the distance between adjacent light guides 21, that is, the gap 22 is 1 mm.

  Moreover, the structure shown by FIG. 5 may be sufficient as the light guide 21. FIG. In the configuration shown in FIG. 5, a plurality of light guides 21 are provided with gaps 22 in parallel with each other in the longitudinal direction. In addition, on the light emission side of the light guide 21 or on the side of the reflection sheet 11 that is the opposite side, light scattering as an optical path changing unit is performed in order to extract light guided inside the light guide 21. A body 23 is provided.

And in order to prevent the generation | occurrence | production of the brightness nonuniformity in the clearance gap 22 mentioned above, as FIG. 5 shows, the light guide 21 has the side edge part (opposite part) which the mutually adjacent light guides 21 mutually oppose.
Is provided with a thin-walled portion 21b. The thin portion 21b is formed to be thinner than the thick portion 21c configured as a central portion (central portion) of a cross section orthogonal to the longitudinal direction of the light guide 21. That is, each light guide 21 has a configuration in which there are thin portions 21b on both sides and a thick portion 21c is provided therebetween.

  With the configuration shown in FIG. 5, the light guide 21 has a missing portion 21 f on the emission side or the reflection sheet side at the side end portion, and the cross section is substantially T-shaped. The substantially T-shape, which is a cross section, includes a thick portion 21c formed thick and a thin portion 21b formed thin. The light guide 21 is disposed so that the thin portion 21b is on the reflection sheet 11 side. That is, the defect portion 21 f is provided on the light exit side of the light guide 21. Moreover, the surface (surface comprised by the two thin parts 21b and the one thick part 21c) on the opposite side to the light-projection surface in the light guide 21 is flush. Here, the term “equal” means that the above-described defect portion is not provided, and in addition to the case where it is completely flush, it is substantially flush within the range showing the same effect as when it is flush. Is also included.

  In the configuration shown in FIG. 8, when the gap 22 is secured to about 3 mm, more preferably about 1 to 2 mm, luminance unevenness may occur in the gap 22. For this reason, it is preferable that the light guide 21 applied to the support 31 of the present embodiment has the configuration shown in FIG. The reason will be described below.

  First, in the configuration of FIG. 8, the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23, as shown by the dashed arrow, and the total reflection condition Is broken, and is emitted out of the light guide 21 from the exit surface 21d or the opposed surface 21e facing the exit surface 21d. Here, if the distance between the facing surface 21e and the reflective sheet 11 is substantially small, the light emitted from the facing surface 21e of the light guide 21 is reflected as shown by the solid line arrow in the configuration of FIG. After being reflected by the sheet 11, the light is incident again on the light guide 21, reflected by the side wall surface 21 g, and then reemitted from the emission surface 21 d.

  As a result, in the diffusing plate 15, it is difficult for light to reach the gap 22 between the adjacent light guides 21, and the area directly above the gap 22 becomes dark. As a result, luminance unevenness occurs.

  On the other hand, the light guide 21 shown in FIG. 5 can prevent occurrence of luminance unevenness in the gap 22. The principle that can prevent the occurrence of uneven brightness is described as follows.

  As shown in FIG. 5, when the missing portion 21 f is provided on the light emitting side of the light guide 21, the thick portion 21 c of the light guide 21 has a thick portion 21 c in the light guide 21, as indicated by the dashed arrow. The light traveling through the light scatterer 23 collides with the light scatterer 23 to change the angle of traveling through the light guide 21, the total reflection condition is broken, and the light exits from the light exit surface 21 d to the outside of the light guide 21, and then enters the diffusion plate 15. Head. However, in this optical path, light does not reach the center of the gap 22 in the diffusion plate 15.

  On the other hand, when the defect portion 21f is present on the emission side of the thin portion 21b of the light guide 21, a large gap is formed in the defect portion 21f between the light exit surface 21d and the diffusion plate 15 in the vicinity of the gap 22. Can be provided. As a result, as shown by the solid arrow in FIG. 5, the light traveling in the light guide 21 changes the angle of traveling in the light guide 21 by colliding with the light scatterer 23, and the total reflection condition is broken. Then, the light is reflected by the reflection sheet 11 provided on the facing surface 21e, and is emitted to the outside of the light guide 21 from the light emitting surface 21d of the thin portion 21b. As a result, in the diffusion plate 15, it is possible to easily illuminate the upper part of the gap 22 between the light guide 21 and the light guide 21. Therefore, unevenness in the gap 22 is unlikely to occur.

That is, in the side edge (also called side light) type light source module 10,
Since the plurality of light guides 21 constituting the light guide plate 20 are provided with gaps 22 in parallel with each other in the longitudinal direction, light irradiation is reduced in the gaps 22 and the luminance unevenness of the entire light guide plate is reduced. Occurs. However, in the configuration shown in FIG. 5, since the missing portion 21 f is provided on the light emission side of each thin portion 21 b, the light emitted from the light guide 21 or the reflection of the light on the reflection sheet 11. The light can pass through the defect portion 21 f of the light guide 21 so that the gap 22 can be illuminated without re-entering the light guide 21.

  Therefore, in the configuration shown in FIG. 5, by providing the thin portion 21b, it is possible to avoid a shortage of luminance in the gap 22, and to provide the light source module 10 that can reduce the occurrence of luminance unevenness. it can.

  Further, as in the configuration shown in FIG. 5, the diffusion plate 15 is provided above the light emitting surface 21 d of the light guide 21 with a distance D of 2 mm, for example, so that the diffusion plate 15 is disposed above the light guide. Compared with the case where the light emitting surface 21d is in close contact with the light emitting surface 21, the luminance unevenness can be reduced.

  In addition, the surface (21g of FIG. 5) in which the thin part 21b and the thin part 21b mutually oppose may be a curved surface. For example, the surface 21g of the one thin portion 21b may be a surface that is convexly curved toward the surface 21g of the other thin portion 21b. Similarly, the surface 21g of the other thin portion 21b is the one thin portion. The surface may be convexly curved toward the surface 21g of 21b.

  Below, the support body 31 which supports the light guide 21 shown by FIG. 5 is demonstrated.

  The light source module 10 of the present embodiment has a main feature in the configuration of the support 31. The support 31 will be described with reference to FIG. FIG. 1 shows the configuration of a support 31 provided in the light source module 10 of the present embodiment, FIG. 1A is a cross-sectional view schematically showing the configuration of the support, and FIG. 3 is a perspective view showing only the configuration of a support 31. FIG.

  First, in the configuration shown in FIG. 1A, the light guides 21 ′ and 21 ″ supported by the support 31 have thin portions 21 b facing each other in order to prevent occurrence of luminance unevenness in the gap 22. The thick portion 21c is configured as a central portion (central portion) of a cross section perpendicular to the longitudinal direction of each of the light guides 21 ′ and 21 ″. . The thin part 21b is formed thinner than the thick part 21c. That is, each of the light guides 21 ′ and 21 ″ has a configuration in which thin portions 21 b are formed on both sides, and a thick portion 21 c is provided between both thin portions 21 b.

  The support 31 includes a base part (base body) 31e, claw parts 31a to 31d, and a flexible part 31f. The base portion 31e is disposed on the opposite side of the light guide 21 from the light emitting side. And the mounting area for mounting each light guide 21 '* 21 "is set in the base part 31e. Moreover, the nail | claw parts 31a-31d are protruded and formed from the base part 31e. The claw portion 31a (first claw portion) and the claw portion 31b (second claw portion) have a light guide that sandwiches one light guide 21 '(first plate-like member) from both sides. In addition, the claw portion 31c (third claw portion) and the claw portion 31d guide the light guide 21 ″ (second plate-like member) from both sides. The body 21 ″ is fixed. In this embodiment, two adjacent light guides 21 ′ and 21 ″ are supported by one support 31 (claw portions 31a to 31d). The present invention is not limited to this number.

  The base portion 31e of the support 31 has a substantially rectangular shape as shown in FIG. 4, and a claw portion 31a and a claw portion 31d are provided at both ends of the light guide support surface (surface), respectively. It has been. In addition, a claw portion 31b and a claw portion 31c are provided at the center of the light guide support surface.

  Although not shown in FIG. 1A, the reflection sheet 11 is disposed between the base portion 31e and the light guides 21 ′ and 21 ″. The claw portion 31a is provided on the reflection sheet 11. A hole through which 31d passes is formed, whereby the reflection sheet 11 can be reliably fixed directly under the light guide 21. Between the reflection sheet 11 and the light guides 21 'and 21 " If the distance changes, uneven brightness may occur. However, by holding the reflective sheet 11 between the base portion 31e and the light guide 21 as in the present embodiment, the reflective sheet 11 and the light guide 21 ′. The distance between 21 "can be kept constant.

  The reflection sheet 11 is provided with a through hole that allows the claw portions 31a to 31d to pass therethrough. The size of the through hole of the reflection sheet 11 is such that the through hole is completely covered by the surface of the base portion 31e when the reflection sheet 11 is disposed between the base portion 31e and the light guides 21 'and 21 ". In other words, the through hole of the reflection sheet 11 is preferably configured to be smaller than the area of the surface of the base portion 31e. When the reflective sheet 11 is disposed between the base portion 31e and the light guides 21 'and 21 ", the surface area is larger than the surface area. When the member (chassis 2 in FIG. 2) is exposed, the luminance is reduced. On the other hand, such a decrease in luminance can be avoided by the size of the through hole being completely covered by the surface of the base portion 31e.

  Here, one side of the light guides 21 ′ and 21 ″ in the parallel direction (Y direction) is the A side (first side), and the other side is the B side (second side). And 31b grip the end portions on the A side and B side of the light guide 21 ′. The claw portions 31c and 31d grip the end portions on the A side and B side of the light guide 21 ″. is doing.

  In the support body 31 of the present embodiment, the claw portions 31a and 31c that hold the end portions on the A side of the light guide bodies 21 ′ and 21 ″ are fixed to the base portion 31e. The claw portions 31b and 31d that hold the end on the B side in each of “• 21” are connected to the base portion 31e via the flexible portion 31f. The flexible portion 31f has a structure that elastically deforms in a direction (Z direction) perpendicular to the mounting surface of the light guide in the base portion 31e. Therefore, the claw portions 31b and 31d are displaced in a direction (Z direction) perpendicular to the mounting surface of the light guide due to elastic deformation of the flexible portion 31f.

  Specifically, as shown in FIG. 1B, only the end on the B side of the flexible portion 31f is connected to the base 31e, and the outer peripheral portion other than the end on the B side is connected to the base 31e. The structure is separated. With such a configuration, for example, when the claw portion 31b connected to the flexible portion 31f is moved upward in the Z direction, the flexible portion 31f is based on the end portion on the B side connected to the base portion 31e. As shown in FIG. And the nail | claw part 31b moves to a Z direction upper side by the elastic deformation of this flexible part 31f.

Here, since the claw portion 31b is displaced in the direction (Z direction) perpendicular to the mounting surface of the light guide due to elastic deformation of the flexible portion 31f, the light guide 21 ′ is moved by the claw portions 31a and 31b. In the sandwiched state, it is not supported at a predetermined position. Therefore, in the support body 31 of the present embodiment, the flexible portion 31f is formed in the placement region of the light guide 21 ″ in the base portion 31e. For this reason, as shown in FIG. When the light guide 21 ″ is supported by the claw portions 31c and 31d, the elastic deformation of the flexible portion 31f is limited by the supported light guide 21 ″. As a result, the light guide 21 ″. Is supported at a predetermined position by the claw portions 31c and 31d, displacement (lifting) of the claw portion 31b is suppressed, so that the light guide 21 'is supported and fixed at a predetermined position by the claw portions 31a and 31b. Will be. That is, the light guide 21 ′ is supported at a predetermined position by the elastic deformation of the flexible portion 31f being suppressed by the light guide 21 ″.

  Thus, the support body 31 of the present embodiment is configured such that the light guide body 21 ″ suppresses the displacement (lifting) of the claw portion 31b that holds the end portion of the light guide body 21 ′. In order to provide the claw portions 31a and 31b with a spring property for supporting the light guide 21 ', it is not necessary to impart a strong spring property to the claw portions 31a and 31b itself. By setting the flexible range, the claw portions 31a and 31b can be provided with a spring property for supporting the light guide 21 '. For this reason, the distance between the light guides 21' and 21 "is 1 mm to 2 mm. Even when the backlight is assembled within a certain range, it is not necessary to increase the size of the claw portions 31a and 31b in the height direction (Z direction), and the light guide 21 'is fixed by the claw portions 31a and 31b. Reduce the height of It is possible. That is, in the claw portions 31a and 31b, the upper portion of the light guide 21 'above the light exit surface 21d only needs to be locked to the light exit surface 21d, so that the protruding portion can be reduced. Therefore, according to the support body 31 of the present embodiment, the portions of the claw portions 31a and 31b that protrude from the light exit surface 21d of the light guide 21 'can be reduced, and the backlight unit can be thinned. can do.

  In addition, since the claw portions 31a and 31b are not provided with a strong spring property, the light guides 21 ′ and 21 ″ can be easily installed on the support 31. Hereinafter, the support 31 of the present embodiment is provided with the support 31. A method of installing the light guides 21 ′ and 21 ″ will be described with reference to FIGS. 6 (a) and 6 (b). FIG. 6 shows a method of installing the light guides 21 ′ and 21 ″ on the support 31 of the present embodiment, and FIG. 6 (a) shows a process of supporting the light guide 21 ′ by the claw portions 31a and 31b. FIG. 6B is a cross-sectional view schematically illustrating a state after the light guide 21 ″ is supported by the claw portions 31c and 31d.

  First, in the method of installing the light guides 21 ′ and 21 ″ on the support body 31 of the present embodiment, as shown in FIG. 6A, the claw portion 31b is lifted. Since the flexible portion 31f that is elastically deformed in a direction perpendicular to the mounting surface of the light guide 21 'is connected, the claw portion 31b can be easily lifted, and after lifting the claw portion 31b, The light guide 21 'is inserted into the space formed between the claw portion 31a and the claw portion 31b, and the light guide 21' is supported at a predetermined position by the claw portions 31a and 31b.

  Thereafter, in the same procedure as described above, the claw portion 31d is lifted, the light guide 21 'is inserted into the space formed between the claw portion 31a and the claw portion 31b, and the light guide 21 "is inserted by the claw portions 31c and 31d. Is supported at a predetermined position.

  After the light guide 21 ″ is disposed at a predetermined position by the claw portions 31c and 31d, the elastic deformation of the flexible portion 31f is suppressed by the light guide 21 ″ as shown in FIG. 6B. For this reason, the claw part 31b connected to the flexible part 31f cannot be lifted upward in the vertical direction with respect to the placement surface. As a result, the light guide 21 'is supported and fixed at a predetermined position by the claw portions 31a and 31b.

  FIGS. 6A and 6B show a method of installing two light guides (light guides 21 ′ and 21 ″) on the support 31, but three or more light guides 21 are supported. Also when installing on the body, a method similar to the method shown in FIGS. 6A and 6B can be employed.

  That is, the support body 31 is further arranged in the parallel direction of the light guide bodies, and three or more light guide bodies 21 are installed by the same method as described above, thereby supporting all the light guide bodies 21 at predetermined positions.・ Can be fixed. And the whole light guide plate 20 will be in the state supported and fixed by pressing the outer periphery of all the light guides 21 (light guide plate 20) supported and fixed with the "B" -shaped frame.

  Thus, according to the support body 31 of this embodiment, since only the nail | claw part 31b can be lifted and light guide 21 'can be supported in a predetermined position, compared with the technique of patent document 1, it is easy. A light guide can be installed on the surface.

  The base portion 31e and the claw portions 31a to 31d may be integrally formed, and the claw portions 31a to 31d are fixed to the base portion 31e (or the flexible portion 31f) with an adhesive or the like. There may be.

  Moreover, the nail | claw parts 31a-31d are provided along the clearance gap 22 of adjacent thin part 21b, as FIG. 1 (a), FIG. 6 (a), and (b) show.

  More specifically, the claw portions 31a to 31d are preferably in contact with the side wall surface 21g, which is an opposing surface of the adjacent thin portion 21b. Needless to say, a structure with a gap of about 0.5 mm may be provided in consideration of assembly tolerances of the light guides 21 ′ and 21 ″ and the support 31. Thereby, the light guides 21 in which the claw portions 31a to 31d are adjacent to each other. Since it exists in the clearance gap between each other, it becomes possible to reliably support the respective light guides 21 at predetermined intervals, and the claw portions 31a to 31d are in contact with the light emitting surface 21d in the thin portion 21b. Of course, it is possible to adopt a structure in which a gap of about 0.5 mm is provided in consideration of assembly tolerances of the light guides 21 ′ and 21 ″ and the support 31. Thus, a part of claw part 31a-31d is the structure which contacts 21d of light-projection surfaces in the thin part 21b, and suppresses that light guide 21 '* 21 "floats to the light-projection side. In addition, a member (for example, the diffusion plate 15) disposed on the light emitting side of the light guides 21 ′ and 21 ″ is prevented from being damaged by the light guides 21 ′ and 21 ″ that are lifted by the light emission. can do.

  Further, the occurrence of uneven brightness is caused by the material of the support member 31 as will be described later. However, as described above, uneven brightness is also caused by the light guide 21 being displaced from a predetermined position. On the other hand, as shown in FIG. 1 (a), the claw portions 31a to 31d are in contact with the side wall surface 21g where the adjacent thin wall portions 21b face each other, and the light emitting surface 21d in the thin wall portion 21b. In contact. Thereby, the light guide 21 can be reliably fixed at a predetermined position, and the occurrence of uneven brightness due to the positional deviation of the light guide 21 can be avoided. Therefore, pseudo-impulse type display can be appropriately performed in the liquid crystal display device, and display quality can be improved.

  Moreover, in the support body 31 of this embodiment, as FIG. 7 shows, the latch member 31g is provided in the surface (back surface) on the opposite side to the light guide mounting surface in the base part 31e. preferable. The latching member 31g provided on the back surface of the base portion 31e is latched in a latching hole (not shown) provided in the chassis 2 (FIG. 2), whereby the chassis 2 disposed below the support 31. It is supposed to be fixed to.

  The material of the support 31 is preferably a highly reflective material (for example, highly reflective polycarbonate) having a high light reflectance.

In addition, although this embodiment demonstrated the support body 31 which supports the light guide 21 shown by FIG. 5, even if the support body 31 is the structure which supported the light guide 21 shown by FIG. This produces the same effect as the above effect. That is, in the support body 31 of this embodiment, it is not necessary to give strong spring property to the nail | claw parts 31a and 31b itself. In the present embodiment, by setting the flexible range of the flexible portion 31f, the claw portions 31a and 31b can be provided with a spring property that supports the light guide 21 shown in FIG. For this reason, even when the backlight is assembled in the range where the distance between the light guides 21 is about 1 mm to 2 mm, it is not necessary to increase the dimension in the height direction (Z direction) of the claw portions 31a and 31b. The height of the location where the light guide 21 is fixed by the claw portions 31a and 31b can be reduced.

  In the present embodiment, the configuration in which the reflection sheet 11 is provided below the light guide plate 20 is described. However, as described above, the reflection sheet 11 is not an essential component in the surface light source device of the present invention. . Therefore, when the reflective sheet 11 is not provided, the support 31 may be provided on a member disposed below the light guide plate 20 or the base of the support 31 (the base portion in FIG. 1). As long as the portion 31 e) expands below the light guide plate 20, the support 31 alone may be disposed below the light guide plate 20.

  Further, in the case of the present embodiment, as shown in FIG. 4, the support bodies 31 are arranged to be scattered below the light guide plate 20, but the present invention is not limited to this, For example, the support members 31 may be arranged in a straight line from the light guide 21 located at the lower end of the paper surface of FIG. 4 to the light guide body 21 located at the upper end of the paper surface of FIG. In that case, the arrangement position of the support 31 may be a central portion (within the screen effective area) of the light guide plate 20 or at least one of both end portions of the light guide plate 20. However, in order to effectively suppress the displacement of the light guide 21, it is preferable to provide the support 31 in the effective screen area.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can also be expressed as follows.

  A fixture for connecting and fixing a plurality of plate-like members, a base plate portion, a first claw portion fixed to the base plate portion and gripping the first plate-like member, and a flexible portion on the base plate portion And a second claw portion that is deformable in the direction from the base plate portion to the first claw portion and grips the plate-like member together with the first claw portion, and adjacent to the first plate-like member At least a third claw portion that grips the second plate-like member, and the third claw portion has the same gripping direction as the first claw portion and the plate-like member, and 3. The fixing device according to claim 3, wherein the claw portion 3 is fixed to the base plate portion on the second claw portion side from a connection portion between the flexible portion and the base plate portion.

  The present invention relates to a support for fixing a plurality of plate-like members provided in parallel with each other in the longitudinal direction, a surface light source device including the support, and an electronic including the surface light source device. Regarding equipment. The present invention is applicable to all techniques for fixing a plurality of plate-like members provided with gaps in parallel with each other in the longitudinal direction. For example, the present invention is applicable to electronic devices such as a surface light source device as a light source module such as a backlight and a liquid crystal display device.

1 Liquid crystal display device (electronic equipment)
2 Chassis 3 Liquid crystal panel 4 Bezel 10 Light source module (surface light source device)
11 Reflective sheet 12 LED (light source)
13 LED board 14 Reflector 15 Diffusion plate (light path conversion part)
16 Optical sheet group 20 Light guide plate 21 Light guide (plate member)
21 'light guide (first plate-like member)
21 "light guide (second plate member)
21a End surface 21b Thin portion 21c Thick portion 21d Light exit surface 21e Opposing surface 21f Defect portion 21g Side wall surface 22 Gap 23 Light scatterer (optical path changing portion)
31 Support 31a Claw part (first claw part)
31b Claw part (second claw part)
31c Claw part (third claw part)
31d Claw 31e Base (base)
31f Flexible part 31g Hanging member

Claims (6)

A support having a base having a mounting surface on which a plurality of plate-like members arranged adjacent to each other in the longitudinal direction is placed, and supports the plate-like members at a predetermined interval,
When one side of the plate-like member in the parallel direction is the first side and the other side is the second side, the first and second plate-like members adjacent to each other among the plurality of plate-like members. ,
A first claw portion fixed to the base and gripping a first side end portion of the first plate-like member;
A second claw portion for gripping a second side end portion of the first plate-like member,
A flexible portion that elastically deforms in a direction perpendicular to the placement surface is provided in the placement region of the second plate-like member on the base, and the second claw portion is interposed via the flexible portion. And a support body connected to the substrate. A third claw portion for holding the first side end portion of the second plate-shaped member;
2. The support according to claim 1, wherein the third claw portion is fixed at a position closer to the second claw portion than a connection portion of the base body to the flexible portion. Each of the plate-like members has thin portions formed thinner at the both ends in the parallel direction than the central portion,
The support according to claim 1 or 2, wherein the first and second claw portions grip a thin portion of the first plate-like member.   The said plate-shaped member is a light guide, The support body in any one of Claims 1-3 characterized by the above-mentioned. A plurality of light guides provided with a gap in parallel with each other in the longitudinal direction;
A surface light source device comprising the support according to claim 4 for supporting the light guides at predetermined intervals.   An electronic apparatus comprising the surface light source device according to claim 5.

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