JP2009193678A - Illuminating device, electrooptical device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress cracks, or the like, from being generated in an electrooptical panel, or the like, when impact, such as, falling is added by devising a structure of an illumination device. <P>SOLUTION: The illumination device is provided with a support member and a light guide plate, arranged superimposed on it. The light guide plate has an incident portion for introducing light emitted from a light source. An engaging portion which is mutually engaged is installed on the incident portion side and the support member. The engaging portions of both are engaged on the incident portion side of the light guide plate. As a result, the integrity of the incident portion side of the light guide plate and the portion of the support member located on the incident portion side of the light guide plate is increased, and improvement in cohesion of these is attained. Thus, when an impact is added on the electrooptical device applying this illumination device, the incident-portion side of the light guide plate and the portion of the support member can be moved integrally in the same direction. As a result, collision of a first substrate of the electrooptical panel and the light guide plate can be contained, and generation of breakage, cracks, chipping off to the first substrate can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an illuminating device suitably used for an electro-optical device.

  2. Description of the Related Art Conventionally, electro-optical devices have been used to display image information in various electronic devices such as cellular phones and portable information terminals.

  In such an electro-optical device, in order to perform so-called transmissive display, an illumination device is disposed on the back side opposite to the observation side (see, for example, Patent Documents 1 to 3).

JP 2007-42338 A JP 2003-255309 A WO2004 / 055430

  In the electro-optical device described in Patent Literature 1, a light guide plate having a rectangular planar shape is fixed to a metal frame by attaching a frame-shaped cover plate to a box-shaped metal frame. However, in this electro-optical device, since the width of the frame portion of the cover plate is short, it cannot be said that the coupling force of the light guide plate to the cover plate and the metal frame is so strong.

  Therefore, when an impact due to dropping or the like is applied to the electro-optical device, the electro-optical panel is pushed by the light guide plate to bend, and thereby bending stress acts to bend the electro-optical panel, or the light guide plate. And the electro-optical panel collide with each other, there is a problem in that a crack, a crack, a chip, or the like occurs in the lower substrate constituting the electro-optical panel.

  Further, the optical unit described in Patent Document 2 (hereinafter referred to as “illumination device” for convenience) includes a rectangular light guide plate provided with fixing protrusions at two locations on opposite sides, and a fixing protrusion. A mold frame provided with a fixing recess to be fitted to the portion, and the light guide plate is molded by accommodating the light guide plate in the mold frame so that the fixing convex portion and the fixing recess are fitted. Fixed to the frame. A light source is disposed between the opposing sides of the light guide plate and the mold frame, at a position where the fixing convex portion and the fixing concave portion do not exist.

  Further, in the light unit described in Patent Document 3 (hereinafter referred to as “illumination device” for convenience), a convex portion is formed on each side surface of the rectangular light guide plate excluding the light incident surface and the anti-light incident surface. The light guide plate is fixed to the frame by fitting the convex portion into the concave portion of the frame.

  In each of the illumination devices described in Patent Documents 2 and 3, on the light incident surface (light incident portion) side of the light guide plate, the convex portion (or fixing convex portion) of the light guide plate and the concave portion (or mold) of the frame are provided. The frame fixing recess) is not fitted. For this reason, when an impact such as dropping is applied to these lighting devices, the light incident part side of the light guide plate and the direction of the frame or the mold frame located on the light incident part side are in conflict with each other. And the same problem as in Patent Document 1 described above may occur.

  The present invention has been made in view of the above points, and an impact such as dropping was applied by enhancing the integrity of the light guide plate and the holding member that holds the light guide plate on the light incident portion side of the light guide plate. In this case, it is an object to provide an illumination device capable of suppressing cracking of an electro-optical panel or the like, an electro-optical device using the same, and an electronic apparatus.

  In one aspect of the present invention, an illumination device includes a holding member, and a light guide plate that is disposed on the holding member and includes a light incident portion for introducing light emitted from a light source. Each of the light guide plate and the holding member is fixed at least on the light incident part side of the light guide plate.

  Said illuminating device is provided with a holding member and the light-guide plate arrange | positioned on the holding member. The light guide plate has a light incident part for introducing light emitted from the light source. Each of the light guide plate and the holding member is fixed at least on the light incident part side of the light guide plate. Thereby, the improvement of the coupling | bonding force of a light guide plate and a holding member can be aimed at the light-incidence part side of a light guide plate at least. Therefore, when an impact due to dropping or the like is applied to the lighting device, the light guide plate and the holding member can be integrally moved in the same direction at least on the light incident portion side of the light guide plate.

  In one aspect of the above illumination device, at least one engagement between the light incident portion side of the light guide plate and the holding member corresponding to the light incident portion side of the light guide plate. An engaging portion is provided, and the engaging portion of the light guide plate and the engaging portion of the frame are engaged on the light incident portion side of the light guide plate.

  The illumination device includes at least one engaging portion (for example, at least one fitting portion) that engages with each other in each of the portions corresponding to the light incident portion side of the light guide plate and the light incident portion side of the light guide plate. A fitting portion) is provided. The engaging portion of the light guide plate and the engaging portion of the holding member are engaged, engaged, or fitted on the light incident portion side of the light guide plate. Thereby, the integrity of the light incident part side of the light guide plate and the location of the holding member corresponding to the light incident part side of the light guide plate is increased, and the coupling force can be improved. Therefore, when an impact due to dropping or the like is applied to the lighting device, the light incident part side of the light guide plate and the location of the holding member can be integrally moved in the same direction.

  In a preferred example, the illumination device can be applied to an electro-optical device including an electro-optical panel in which an electro-optical material is sandwiched between a pair of substrates formed of a glass material or the like. In this case, the lighting device is disposed on one of the pair of substrates. Accordingly, when an impact due to dropping or the like is applied to the electro-optical device, the light incident portion side of the light guide plate and the location of the holding member can be integrally moved in the same direction. As a result, it is possible to prevent the one substrate and the light guide plate from colliding with each other, and thus it is possible to suppress the occurrence of cracks, cracks, chips, and the like on the one substrate.

In another aspect of the illumination device, each of the engagement portion of the light guide plate and the engagement portion of the holding member has a shape that restricts the movement of the light guide plate in the thickness direction of the light guide plate. Have.
In a preferred example, the engaging portion of the light guide plate has a step shape, and the engaging portion of the holding member has a hook shape or a claw shape that engages or engages with the step shape. As a result, when an impact due to dropping or the like is applied to the lighting device, the light incident part side of the light guide plate and the location of the holding member corresponding to the light incident part side of the light guide plate are integrated in the same direction. The amount of movement when moving to can be reduced. Therefore, if such an illuminating device is applied to the above electro-optical device, it is difficult for a stress to bend one substrate to act, and it is possible to suppress the occurrence of cracks, cracks, chips, etc. on one substrate. it can.

  In another aspect of the above illumination device, the engaging portion of the light guide plate and the engaging portion of the holding member include the side on the light incident portion side of the light guide plate and the light incident portion of the light guide plate. At least one side other than the side side is engaged, engaged or fitted. Thereby, the engaging part located in each of at least one side other than the side on the light incident part side of the light guide plate and the side on the light incident part side of the light guide plate, and the engaging part of the holding member corresponding to each of these sides , And the coupling force between them can be improved. Therefore, when an impact due to dropping or the like is applied to the lighting device, the portion of the light guide plate positioned on the side of the light guide plate on the light incident portion side and the holding member corresponding to the side of the light guide plate on the light input portion side The portion can be moved integrally in the same direction, and the portion of the light guide plate located on at least one side other than the side on the light incident portion side of the light guide plate and the side other than the side on the light incident portion side of the light guide plate The portion of the holding member corresponding to at least one side can be integrally moved in the same direction.

  In another aspect of the illumination device, at least one light source is disposed at a position facing the light incident portion of the light guide plate, and the engagement portion of the light guide plate and the engagement of the holding member are arranged. Each of the portions is provided outside the emission range of the light emitted from the at least one light source. Accordingly, light emitted from at least one light source can be prevented from being blocked by the engaging portion of the light guide plate and the engaging portion of the holding member. As a result, the light is introduced into the light guide plate from at least one light source. It is possible to prevent the amount of light to be reduced.

  In another aspect of the illumination device, the light incident portion of the light guide plate is provided at an appropriate interval in the extending direction of the outer side of the light guide plate, and the light incident portion of the light guide plate Light sources are respectively disposed at positions facing each of the light sources, and regions outside the light emission range of each of the light sources are formed at positions corresponding to both sides of the light sources. Each of the engaging portion of the light guide plate and the engaging portion of the holding member is provided in at least one region out of the plurality of regions outside the emission range. Thereby, the light emitted from each light source can be prevented from being blocked by each engaging portion of the light guide plate and each engaging portion of the holding member. As a result, the light introduced from each light source into the light guide plate. It is possible to prevent a decrease in the amount of. In addition to this, if each engagement portion of the light guide plate and each engagement portion of the holding member are provided in all regions out of the plurality of regions outside the emission range, each engagement of the light guide plate Compared with a configuration in which each engaging portion of the light guide plate and the holding member is provided in any one of the regions outside the plurality of emission ranges, the light incident portion side of the light guide plate and the holding member are further coupled You can improve your power.

  In another aspect of the illumination device, an opening is formed in the vicinity of the engaging portion of the holding member, and a part of the engaging portion of the light guide plate enters the opening of the holding member. The thicknesses of the engaging portion of the light guide plate and the engaging portion of the holding member that are engaged with each other are substantially the same as the combined thickness of the light guide plate and the holding member. Thereby, it can prevent that the thickness of an illuminating device becomes thick. Therefore, if such an illuminating device is applied to the above-described electro-optical device, it can contribute to thinning of the electro-optical device.

  In another aspect of the lighting device, the holding member is formed of a metal material. Thereby, the rigidity of the holding member can be improved. Therefore, when an impact is applied to the lighting device, the movement when the light incident part side of the light guide plate and the portion of the holding member corresponding to the light incident part side of the light guide plate move integrally in the same direction The amount can be reduced. Therefore, if such an illuminating device is applied to the above electro-optical device, it is difficult for a stress to bend one substrate to act, and it is possible to suppress the occurrence of cracks, cracks, chips, etc. on one substrate. it can.

  In another aspect of the present invention, an electro-optical device includes the above-described illumination device and an electro-optical panel disposed at a position facing the illumination device, and the light guide plate is attached to the electro-optical panel. Yes. According to this, when an impact due to dropping or the like is applied to the electro-optical device, the light incident part side of the light guide plate, the location of the holding member corresponding to the light incident part side of the light guide plate, the part of the electro optical panel, Can be moved together in the same direction. As a result, since the electro-optical panel and the light guide plate can be prevented from colliding with each other, it is possible to prevent the electro-optical panel from being cracked, cracked, chipped, or the like.

  In one aspect of the electro-optical device, the electro-optical panel includes an electro-optical material sandwiched between a pair of substrates, and one of the pair of substrates projects outward from one end of the other substrate. Each of the engaging portion of the light guide plate and the engaging portion of the holding member is disposed in a region overlapping a boundary portion between the one substrate and the other substrate. Thereby, the strength of the boundary portion of the electro-optical device can be improved. Therefore, when an impact due to dropping or the like is applied to the electro-optical device, the one substrate, the light guide plate, and the holding member can be integrally moved in the same direction at the boundary portion. Therefore, it is possible to suppress the occurrence of cracks, cracks, chips, and the like with respect to the portion of the one substrate located at the boundary portion.

  In another aspect of the electro-optical device, the electro-optical panel includes an electro-optical material sandwiched between a pair of substrates, and one of the pair of substrates extends outward from one end of the other substrate. A drive circuit for driving the electro-optic material is mounted on the projecting area, and each of the engaging part of the light guide plate and the engaging part of the holding member is provided on the projecting area. Is disposed in a region overlapping with the drive circuit. Thereby, it is possible to improve the strength of the electro-optical device located in the region overlapping with the drive circuit (for example, driver IC). Therefore, when an impact is applied to the electro-optical device, one substrate, the light guide plate, and the holding member can be integrally moved in the same direction in a region overlapping with the drive circuit. Thereby, since it can suppress that the stress which bends with respect to a drive circuit acts, it can suppress that a crack, a crack, a chip | tip, etc. arise with respect to a drive circuit.

  In still another aspect of the invention, an electronic apparatus including the electro-optical device as a display unit can be configured.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

[First embodiment]
(Configuration of liquid crystal device)
The configuration of the liquid crystal device 100 as an example of the electro-optical device according to the first embodiment of the invention will be described below with reference to FIGS. 1 to 3.

  FIG. 1 is a perspective view of the liquid crystal device 100 as viewed from the observation side. FIG. 2 is an exploded perspective view of the liquid crystal device 100. FIG. 3 is a cross-sectional view of the liquid crystal device 100 along the cutting line A-A ′ of FIG. 1, and particularly shows a cross-sectional configuration of the liquid crystal device 100 cut at a position passing through the light source 8. In FIG. 1 to FIG. 3, an area indicated by a two-dot chain line in the liquid crystal display panel 50 is an effective display area V <b> 1 in which images such as characters and figures are displayed. In FIG. 2, the illustration of the light shielding tape 15 shown in FIG. 3 is omitted for convenience.

  The liquid crystal device 100 mainly includes a first holding member 11, a liquid crystal display panel 50 as an example of an electro-optical panel, and a lighting device 51 having a second holding member 12.

  The first holding member 11 has a function as a lid for the second holding member 12 and plays a role of accommodating the light guide plate 9 and the liquid crystal display panel 50 together with the second holding member 12. The first holding member 11 is provided at a position corresponding to the effective display area V1 of the liquid crystal display panel 50, and includes an opening 11a having substantially the same size as the effective display area V1.

  The liquid crystal display panel 50 includes a first substrate 1 formed of a light-transmitting material such as glass and a second substrate 2 formed of the same material as the first substrate 1 and a frame-shaped sealing material 3. And a liquid crystal layer 4 as an example of an electro-optical material is sandwiched between regions separated by the frame-shaped sealing material 3. On the inner surface of the liquid crystal display panel 50 on the liquid crystal layer 4 side, for example, a black matrix, a color filter, electrodes, and many other components are formed in a matrix (lattice) or stripes (linear). The illustration is omitted in FIGS. 1 to 3. Further, the first substrate 1 has an overhang region 1 h that projects outward from one end of the second substrate 2. A driver IC (driving circuit) 5 and an FPC (flexible printed circuit) 6 for driving the liquid crystal are mounted on the surface of the projecting region 1h on the second substrate 2 side. One end side of the FPC 6 is mounted on the overhang area 1h, while the other end side of the FPC 6 is folded back to the opposite side of the overhang area 1h to the second substrate 2 side, and further a light shielding tape ( It is bonded to the first substrate 1 through a light-shielding double-faced tape 15. On the surface on the other end side of the FPC 6, a plurality of light sources 8 such as LEDs (Light Emitting Diodes) are arranged at appropriate intervals. In the present invention, the liquid crystal display panel 50 is not limited to a specific configuration, and may adopt various known configurations.

  The illumination device 51 includes the second holding member 12 and the light guide plate 9.

  The second holding member 12 is formed of, for example, a metal material and has a box shape that accommodates the light guide plate 9. In addition, the detailed configuration of the second holding member 12 will be described later.

  The light guide plate 9 has, for example, a substantially rectangular planar shape. The light guide plate 9 is formed of a translucent material such as a transparent resin, for example, and is disposed on the second holding member 12 in an overlapping manner. In the vicinity of each outer side of the surface of the light guide plate 9 opposite to the second holding member 12 side, a frame-shaped light shielding tape 15 with respect to the surface of the first substrate 1 opposite to the second substrate 2 side. Is attached through. In addition, a plurality of concave portions 9 b that are recessed inward from the outer end surface 9 a are formed on the outer end surface 9 a side of the light guide plate 9. Each light source 8 is disposed in each concave portion 9a, and the surface of each concave portion 9a facing each light source 8 functions as a light incident portion for introducing light L emitted from each light source 8 into the light guide plate 9. . Therefore, in the following, the surface of each recess 9a that faces each light source 8 is referred to as “light incident portion 9ba”. In addition, the detailed configuration of the light guide plate 9 will be described later.

  In the lighting device 51 described above, various optical sheets such as a prism sheet, a diffusion sheet, and a reflection sheet are not provided. However, the present invention is not limited to this, and various optical sheets are used for the lighting device 51. It is good also as providing.

  In the liquid crystal device 100 having the above configuration, each light source 8 emits light by the drive current supplied from the FPC 6 side, and the emitted light L enters the light guide plate 9 through the light incident portion 9ba of the light guide plate 9. . When the light L incident on the inside of the light guide plate 9 is repeatedly reflected between the lower surface 9d and the upper surface (light output surface) 9u of the light guide plate 9, and the angle formed by the light output surface 9u and the light L exceeds the critical angle, The light L passes through the light exit surface 9u and exits to the liquid crystal display panel 50 side. Then, when the emitted light L passes through the liquid crystal display panel 50, the orientation of the liquid crystal molecules in the liquid crystal layer 4 is controlled, and a desired display image is visually recognized by the observer.

  Next, the attachment structure of the light guide plate 9 to the second holding member 12 according to the first embodiment of the present invention will be described. In the following, first, the configuration of the light guide plate 9 will be described in detail, then the configuration of the second holding member 12 will be described in detail, and then the mounting structure of the light guide plate 9 to the second holding member 12 will be described. To do.

(Configuration of light guide plate)
First, the configuration of the light guide plate 9 will be described in detail with reference to FIGS. 4 (a) and 4 (c).

  FIG. 4A shows a plan view of the light guide plate 9 viewed from the observation side of FIG. In FIG. 4A, each light source 8 is illustrated so that the relative positional relationship between each light incident portion 9ba of the light guide plate 9 and each light source 8 can also be understood. In FIG. 4A, a broken line extending obliquely from each light source 8 into the light guide plate 9 indicates an outer edge portion of the light L emitted radially from each light source 8 toward the light guide plate 9. FIG. 4C is a cross-sectional view of the main part of the light guide plate 9 taken along the cutting line B-B ′ of FIG. 4A, and particularly shows a cross-sectional configuration of the engaging portion 9 c of the light guide plate 9.

  The basic configuration of the light guide plate 9 is as described above. In particular, an engaging portion 9 c that engages with an engaging portion 12 c of a second holding member 12 described later is provided on the light incident portion 9 ba side or the outer end surface 9 a side of the light guide plate 9. In this example, the engaging portion 9 c of the light guide plate 9 is configured as a fitting portion that fits with the engaging portion 12 c of the second holding member 12. The engaging portion 9c of the light guide plate 9 is engaged with the engaging portion 12c of the second holding member 12, so that the thickness direction of the light guide plate 9 with respect to the second holding member 12 is orthogonal to the thickness direction. It has a shape that regulates the movement of the light guide plate 9 in the direction to be performed (that is, the planar direction of the light guide plate 9). In this example, the engaging portion 9 c of the light guide plate 9 has a stepped shape or a stepped shape that forms a step from the light output surface 9 u to the lower surface 9 d of the light guide plate 9. In addition, a plurality of engaging portions 9c of the light guide plate 9 are provided, and each engaging portion 9c is on both sides of each light incident portion 9ba and is outside the emission range of light emitted from each light source 8. It is provided at a position corresponding to A6.

(Configuration of second holding member)
Next, the structure of the second holding member 12 will be described in detail with reference to FIGS.

  FIG. 4B shows a plan view of the second holding member 12 viewed from the observation side of FIG. FIG. 4D is a cross-sectional view of the main part of the second holding member 12 taken along the cutting line CC ′ in FIG. 4B, and in particular, the engagement portion 12 c of the second holding member 12. A cross-sectional structure is shown.

  The basic configuration of the second holding member 12 is as described above. In particular, the second holding member 12 includes an engaging portion 12 c that is provided in the vicinity of one end (outer end surface) 12 a side and engages with the engaging portion 9 c of the light guide plate 9. In this example, the engaging portion 12 c of the second holding member 12 is configured as a fitting portion that fits with the engaging portion 9 c of the light guide plate 9. Each engagement portion 12c of the second holding member 12 has a hook shape or a claw shape that engages with each engagement portion 9c of the light guide plate 9 having a stepped shape or a stepped shape, for example. Further, in the vicinity of each engaging portion 12 c of the second holding member 12, an opening 12 b into which a part of each engaging portion 9 c of the light guide plate 9 enters is formed.

(Attachment structure of light guide plate to second holding member)
Next, referring to FIGS. 2, 5, and 6 (a), a structure for attaching the light guide plate 9 to the second holding member 12 will be described.

  Fig.5 (a) shows the principal part top view of the attachment structure of the light-guide plate 9 with respect to the 2nd holding member 12 which concerns on 1st Embodiment. FIG. 5B is a cross-sectional view of main parts of the light guide plate 9 and the second holding member 12 taken along the cutting line DD ′ in FIG. 5A, and in particular, the engaging portion 9 c of the light guide plate 9. And an engagement structure of the engagement portion 12c of the second holding member 12. FIG. 6A is a cross-sectional view of the liquid crystal device 100 cut at a position passing through the engaging portion 9c of the light guide plate 9 and the engaging portion 12c of the second holding member 12 that are engaged with each other.

  In the first embodiment, the light guide plate 9 is attached to the second holding member 12 so as to overlap with the light shielding tape 15, and each engagement portion 9 c of the light guide plate 9 and each engagement portion 12 c of the second holding member 12. Are engaged, engaged or fitted on the light incident portion 9ba side of the light guide plate 9.

  As a result, the unity between the light incident part 9ba side of the light guide plate 9 and the portion (location) of the second holding member 12 located on the light incident part 9ba side of the light guide plate 9 is increased, and the coupling force thereof is improved. Can be achieved. Therefore, when an impact due to dropping or the like is applied to the liquid crystal device 100, the light incident portion 9ba side of the light guide plate 9 and the portion of the second holding member 12 located on the light incident portion 9ba side of the light guide plate 9; The portion of the first substrate 1 positioned on the light incident portion 9ba side of the light guide plate 9 can be moved integrally in the same direction. Thereby, it can suppress that the 1st board | substrate 1 and the light-guide plate 9 collide. As a result, it is possible to prevent the first substrate 1 from being cracked, cracked, chipped, or the like.

  In the first embodiment, each engaging portion 9 c of the light guide plate 9 and each engaging portion 12 c of the second holding member 12 have a shape that restricts the movement of the light guide plate 9 in the thickness direction of the light guide plate 9. Have. Thereby, when an impact due to dropping or the like is applied to the liquid crystal device 100, the light incident portion 9ba of the light guide plate 9 and the portion of the second holding member 12 located in the light incident portion 9ba of the light guide plate 9 are The amount of movement when moving integrally in the same direction can be reduced. This makes it difficult for a stress to bend to the first substrate 1 to act, and it is possible to prevent the first substrate 1 from being cracked, cracked, chipped, or the like.

  In the first embodiment, each engagement portion 9 c of the light guide plate 9 and each engagement portion 12 c of the second holding member 12 are in the plane direction of the light guide plate 9 orthogonal to the thickness direction of the light guide plate 9. It has a shape that regulates the movement of. Specifically, as shown in FIG. 5A, the light guide plate 9 and the second holding member 12 are guided with respect to the center line L1 (a line that bisects the light incident portion 9ba of the light guide plate 9). Each engaging part 9c of the optical plate 9 and each engaging part 12c of the second holding member 12 have a symmetrical shape. For example, in the regions A1 to A3 of the light guide plate 9, the engaging portion 9c is formed on the right side of the protrusions of the light guide plate 9 formed on both sides of the light source 8, while in the regions A4 to A6 of the light guide plate 9, the guide portions 9c are guided. An engaging portion 9 c is formed on the left side of the protruding portion of the optical plate 9.

  As a result, the engaging portion 12c of the second holding member 12 comes into contact with the side wall of the engaging portion 9c of the light guide plate 9 in the arrangement direction of the light sources 8, as can be seen with reference to FIG. The movement of the light guide plate 9 relative to the second holding member 12 in the direction along the side of the light incident portion 9ba (the left-right direction in FIG. 5A) is restricted. Further, as shown in FIG. 5 (b), a part of each engaging portion 9 c of the light guide plate 9 enters each opening 12 b of the second holding member 12, so that it is guided to the second holding member 12. The movement of the light plate 9 in the direction of the light incident part 9ba and the side opposite to the light incident part 9ba (the vertical direction in the drawing of FIG. 5A) is restricted. Thereby, when an impact due to dropping or the like is applied to the liquid crystal device 100, the movement of the light guide plate 9 in the plane direction perpendicular to the thickness direction of the light guide plate 9 is performed with respect to the second holding member 12. Can also be regulated.

  In the first embodiment, a plurality of engaging portions 9c of the light guide plate 9 and a plurality of engaging portions 12c of the second holding member 12 are provided. However, the present invention is not limited to this. Even if only one engaging portion 9c and one engaging portion 12c of the second holding member 12 are provided, the thickness direction of the light guide plate 9 with respect to the second holding member 12 and the direction orthogonal to the thickness direction (that is, The movement of the light guide plate 9 in the plane direction of the light guide plate 9 can be restricted. For example, in FIG. 5 (a), for example, an engaging portion (an engaging portion 9c of the light guide plate 9 and the second holding portion) that is slightly smaller than the size of the protruding portion is provided on the protruding portion of the light guide plate 9 located in the region A3. Assume a configuration in which only one engaging portion 12c of the member 12 is provided (corresponding to the broken line region E1 in FIG. 5A).

  In this configuration, the thickness direction of the light guide plate 9 with respect to the second holding member 12 when the engaging portion 9c of the light guide plate 9 and the engaging portion 12c of the second holding member 12 are engaged or fitted. As a matter of course, the engagement portion 12c of the second holding member 12 comes into contact with the side wall of the engagement portion 9c of the light guide plate 9 in the arrangement direction of the light sources 8, The movement of the light guide plate 9 with respect to the second holding member 12 in the direction along the side of the light incident portion 9ba (the left-right direction in FIG. 5A) can also be restricted. Even under this configuration, as shown in FIG. 5B, a part of the engaging portion 9c of the light guide plate 9 located in the broken line area E1 is part of the second holding member 12 located in the broken line area E1. In order to enter each opening 12b, the movement of the light guide plate 9 with respect to the second holding member 12 in the direction of the light incident portion 9ba and the side opposite thereto (the vertical direction in FIG. 5A) is also restricted.

  In the first embodiment, the light incident portions 9ba of the light guide plate 9 are provided at appropriate intervals in the extending direction of the outer end surface (outer side) 9a, and each light incident portion of the light guide plate 9 is provided. Light sources 8 are arranged at positions facing 9ba, and areas A1 to A6 outside the emission range of light emitted from each light source are formed at positions corresponding to both sides of each light source 8. Each engagement portion 9c of the optical plate 9 and each engagement portion 12c of the second holding member 12 are provided corresponding to each of the regions A1 to A6. Thereby, it is possible to prevent the light L emitted from each light source 8 from being shielded by each engaging portion 9c of the light guide plate 9 and each engaging portion 12c of the second holding member 12, and as a result, each light source 8 can prevent the amount of light L introduced into the light guide plate 9 from being reduced. In addition to this, each engaging portion 9c of the light guide plate 9 and each engaging portion 12c of the second holding member 12 are provided in all the regions A1 to A6. 9c and each engaging part 12c compared with the structure provided in any area | region among the said area | region A1-A6, the light-incidence part 9ba side of the light-guide plate 9, the 2nd holding member 12, and The coupling force can be improved. However, the present invention is not limited to this, and in the present invention, each engaging portion 9c of the light guide plate 9 and each engaging portion 12c of the second holding member 12 are provided in at least one of the regions A1 to A6. It only has to be.

  Moreover, in 1st Embodiment, a part of each engaging part 9c of the light-guide plate 9 has penetrated each opening 12b of the 2nd holding member 12, and each engaging part 9c of the light-guide plate 9 which mutually engages, and The thickness d3 of each engaging portion 12c of the second holding member 12 is equal to the thickness d1 of the light guide plate 9 and the thickness d2 of the second holding member 12 as shown in FIG. It is almost the same as the thickness. Thereby, it can prevent that the thickness of the illuminating device 51 becomes thick, and can contribute to thickness reduction of the liquid crystal device 100.

  In the first embodiment, the second holding member 12 is formed of a metal material. Thereby, the rigidity of the second holding member 12 can be improved. Therefore, when an impact is applied to the liquid crystal device 100, the light incident portion 9 ba side of the light guide plate 9, the portion of the second holding member 12 positioned on the light incident portion 9 ba side of the light guide plate 9, and the light guide plate 9. The amount of movement when the part of the first substrate 1 located on the light incident part 9ba side moves integrally in the same direction can be reduced. As a result, it becomes difficult for a stress to bend to the first substrate 1 to act, and it is possible to suppress the first substrate 1 from being cracked, cracked, chipped, or the like.

  In the first embodiment, the positions of the engaging portions 9 c of the light guide plate 9 and the engaging portions 12 c of the second holding member 12 are arranged at predetermined positions on the liquid crystal display panel 50. For this reason, compared with the comparative example assumed below, the following advantageous effects can be acquired.

  That is, as a comparative example, a liquid crystal display in which a liquid crystal layer is sandwiched between a first substrate and a second substrate, and further, the first substrate has an overhanging region projecting outward from one end of the second substrate. Assume a panel. When an impact due to dropping or the like is applied to the liquid crystal display panel having such a configuration, the first substrate is on the observation side and on the opposite side from the observation side with the boundary portion between the first substrate and the second substrate as a base point There is a risk that the boundary will be cracked, cracked or chipped due to this.

  On the other hand, in the first embodiment, each of the engaging portions 9c of the light guide plate 9 and each of the engaging portions 12c of the second holding member 12 are most easily cracked at the time of impact. It is arranged in a region overlapping with a boundary portion with the second substrate 2 (a portion corresponding to the broken line region A30 in FIG. 6A). Thereby, the strength of the boundary portion A30 of the liquid crystal device 100 can be improved. Therefore, when an impact due to dropping or the like is applied to the liquid crystal device 100, the first substrate 1, the light guide plate 9, and the second holding member 12 are integrally moved in the same direction at the boundary portion A30. be able to. As a result, it is possible to suppress the occurrence of cracks, cracks, chips, etc. with respect to the portion of the first substrate 1 located at the boundary portion A30.

[Second Embodiment]
Next, with reference to FIG. 6B, a mounting structure of the light guide plate 9x with respect to the second holding member 12x in the liquid crystal device 200 according to the second embodiment of the present invention will be described. In the following, the same elements as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  FIG. 6B shows a cross-sectional view of the liquid crystal device 200 cut at a position passing through the engaging portion 9c of the light guide plate 9x and the engaging portion 12c of the second holding member 12x that are engaged with each other.

  When the first embodiment and the second embodiment are compared, in the first embodiment, in the lighting device 50, each engagement portion 9c of the light guide plate 9 and each engagement portion 12c of the second holding member 12 are Whereas in the second embodiment, each of the engaging portions 9c and the second of the light guide plate 9x in the illuminating device 51x is arranged in a region overlapping the boundary portion A30 between the first substrate 1 and the second substrate 2. Each of the engaging portions 12c of the holding member 12x is disposed in a region overlapping with a driver IC 5 as an example of a drive circuit (a portion corresponding to the broken line region A31 in FIG. 6B), and both are configured in this point. Same as above, otherwise the same.

  Thereby, the strength of the liquid crystal device 200 located in the region A2 overlapping with the driver IC 5 can be improved. Therefore, when an impact is applied to the liquid crystal device 200, the first substrate 1, the light guide plate 9x, and the second holding member 12x can be integrally moved in the same direction in the region A31 overlapping the driver IC 5. it can. Thereby, since it can suppress that the stress which bends with respect to driver IC5 acts, it can suppress that a crack, a crack, a chip | tip, etc. arise with respect to driver IC5.

[Modification]
Instead of the first and second embodiments described above, the present invention increases the shape of each engagement portion 9c of the light guide plate 9 and each engagement portion 12c of the second holding member 12 to increase the size of the guide. Each engagement portion 9c of the optical plate 9 and each engagement portion 12c of the second holding member 12 are arranged in a region overlapping the boundary portion A30 between the first substrate 1 and the second substrate 2 and the region A31 overlapping the driver IC 5. It is good also as arranging. Thereby, when an impact due to dropping or the like is applied to the liquid crystal device according to this modification, the first substrate 1, the light guide plate 9, and the second holding member 12 are connected in the boundary portion A30 and the region A31. It can be moved integrally in the same direction. As a result, it is possible to suppress the occurrence of cracks, cracks, chips, etc., in the portion of the first substrate 1 located in the boundary portion A30 and the driver IC 5 located in the region A31.

  Alternatively, in the present invention, the shape of each engaging portion 9c of the light guide plate 9 and each engaging portion 12c of the second holding member 12 is made the same size as in the first and second embodiments, and the light guide plate At least one of the nine engaging portions 9c and each engaging portion 12c of the second holding member 12 is disposed in a region overlapping the boundary portion A30 between the first substrate 1 and the second substrate 2. The other at least one may be arranged in a region overlapping with the region A31 overlapping with the driver IC5. Thereby, the same operation effect as a modification mentioned above can be acquired.

  In the first and second embodiments described above, each engaging portion 9c of the light guide plate 9 and each engaging portion 12c of the second holding member 12 are on the side of the light guide plate 9 on the light incident portion 9ba side. It was engaged, fitted or engaged. Not only this but in this invention, each engaging part 9c of the light-guide plate 9 and each engaging part 12c of the 2nd holding member 12 are the edge | side of the light-incidence part 9ba side of the light-guide plate 9, and the light-guide plate 9 side. At least one side other than the side on the light incident part 9ba side may be engaged, fitted, or engaged.

  Accordingly, the engaging portion 9c located on at least one side other than the side on the light incident portion 9ba side of the light guide plate 9 and the side on the light incident portion 9ba side of the light guide plate 9, and the second holding member corresponding to that side The unity with the 12 engaging portions 12c is increased, and the coupling force thereof can be improved. Therefore, when an impact due to dropping or the like is applied to the lighting device, the light guide plate 9 is located on the side of the light guide plate 9 on the side of the light incident part 9ba and the side of the light guide plate 9 on the side of the light incident part 9ba. The portion of the light guide plate 9 that can move integrally with the corresponding second holding member 12 portion in the same direction and is located on at least one side of the light guide plate 9 other than the side on the light incident portion 9ba side. And the portion of the second holding member 12 corresponding to at least one side other than the side on the light incident portion 9ba side of the light guide plate 9 can be integrally moved in the same direction.

  In addition, in the present invention, any configuration (for example, engagement, etc.) is acceptable as long as each of the light guide plate 9 and the second holding member 12 is fixed at least on the light incident portion 9ba side of the light guide plate 9. (Engagement or fitting structure) may be adopted.

[Electronics]
Next, a specific example of an electronic apparatus including the liquid crystal device 100 or 200 according to the above-described first, second embodiment, or modification (hereinafter referred to as “liquid crystal device 1000”) will be described with reference to FIG. I will explain.

  First, an example in which the liquid crystal device 1000 according to the present invention is applied to a display unit of a portable personal computer (so-called notebook personal computer) will be described. FIG. 7A is a perspective view showing the configuration of this personal computer. As shown in the figure, a personal computer 710 includes a main body 712 having a keyboard 711 and a display 713 to which the liquid crystal device 1000 according to the present invention is applied.

  Next, an example in which the liquid crystal device 1000 according to the present invention is applied to a display unit of a mobile phone will be described. FIG. 7B is a perspective view showing the configuration of the mobile phone. As shown in the figure, a cellular phone 720 includes a plurality of operation buttons 721, a reception port 722, a transmission port 723, and a display unit 724 to which the liquid crystal device 1000 according to the present invention is applied.

  In addition, as an electronic device to which the liquid crystal device 1000 according to the present invention can be applied, in addition to the personal computer shown in FIG. 7A and the mobile phone shown in FIG. Monitor direct-view video tape recorders, car navigation devices, pagers, electronic notebooks, calculators, word processors, workstations, videophones, POS terminals, digital still cameras, etc.

1 is a perspective view of a liquid crystal device according to a first embodiment of the present invention. 1 is an exploded perspective view of a liquid crystal device according to a first embodiment. FIG. 2 is a cross-sectional view of the liquid crystal device taken along a cutting line A-A ′ in FIG. 1. The top view of each light guide plate and 2nd holding member which concerns on 1st Embodiment, and principal part sectional drawing of each engaging part vicinity of a light guide plate and a 2nd holding member. The principal part top view and principal part sectional drawing which show the engagement structure of the engaging part of the light-guide plate which concerns on 1st Embodiment, and the engaging part of a 2nd holding member Sectional drawing which shows the positional relationship between each engaging part of the light-guide plate and 2nd holding member which concerns on 1st or 2nd embodiment, and a liquid crystal display panel. FIG. 14 is a perspective view of an electronic device including the liquid crystal device of the invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 1st board | substrate, 1h Overhang | projection area | region, 2 2nd board | substrate, 5 Driver IC (drive circuit), 9 Light guide plate, 9ba Light incident part, 9c Engagement part, 12 2nd holding member, 12b Opening, 12c Joint unit, 8 light source, 50 liquid crystal display panel, 100, 200, 1000 liquid crystal device

Claims (11)

A holding member;
A light guide plate disposed on the holding member and having a light incident part for introducing light emitted from a light source,
Each of the said light guide plate and the said holding member is being fixed at the said light-incidence part side of the said light guide plate at least, The illuminating device characterized by the above-mentioned. At least one engaging portion is provided in each of the portions corresponding to the light incident portion side of the light guide plate of the light guide plate and the holding member of the light guide plate,
The lighting device according to claim 1, wherein the engaging portion of the light guide plate and the engaging portion of the holding member are engaged on the light incident portion side of the light guide plate.   3. The shape according to claim 2, wherein each of the engaging portion of the light guide plate and the engaging portion of the holding member has a shape that restricts movement of the light guide plate in a thickness direction of the light guide plate. The lighting device described.   The lighting device according to claim 3, wherein the engagement portion of the light guide plate has a step shape, and the engagement portion of the holding member has a hook shape engaged with the step shape.   The engaging portion of the light guide plate and the engaging portion of the holding member are engaged in at least one side other than the side of the light guide plate on the light incident portion side and the side of the light guide plate on the light incident portion side. The lighting device according to claim 2, wherein the lighting device is worn. At least one light source is disposed at a position facing the light incident portion of the light guide plate,
Each of the said engaging part of the said light-guide plate and the said engaging part of the said holding member is provided outside the emission range of the light radiate | emitted from the said at least 1 light source. The lighting device according to claim 5. An opening is formed in the vicinity of the engaging portion of the holding member,
A part of the engaging portion of the light guide plate enters the opening of the holding member,
The thicknesses of the engaging portion of the light guide plate and the engaging portion of the holding member that are engaged with each other are substantially the same as the combined thickness of the light guide plate and the holding member. The illumination device according to any one of claims 2 to 6. An illumination device according to any one of claims 1 to 7, and an electro-optical panel disposed at a position facing the illumination device,
The electro-optical device, wherein the light guide plate is attached to the electro-optical panel. The electro-optical panel comprises an electro-optical material sandwiched between a pair of substrates,
One of the pair of substrates extends outward from one end of the other substrate,
Each of the said engaging part of the said light-guide plate and the said engaging part of the said holding member is arrange | positioned in the area | region which overlaps with the boundary part of said one board | substrate and said other board | substrate. 9. The electro-optical device according to 8. The electro-optical panel comprises an electro-optical material sandwiched between a pair of substrates,
One of the pair of substrates has an overhang region that projects outward from one end of the other substrate, and a drive circuit that drives the electro-optic material is mounted on the overhang region,
9. The electro-optical device according to claim 8, wherein each of the engaging portion of the light guide plate and the engaging portion of the holding member is disposed in a region overlapping with the drive circuit.   11. An electronic apparatus comprising the electro-optical device according to claim 8 as a display unit.

Images