JP2009295434A - Lighting system, electro-optical device and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To emit light of uniform luminance toward an electro-optical panel in a direct lighting system by devising the layout structure of light sources. <P>SOLUTION: The lighting system, which is a so-called direct lighting system, includes a plurality of light sources and a substrate for holding them. The plurality of light sources include a reference light source which emits light in the normal direction of the substrate. Each light source is arranged, for example, in a matrix relative to one side of the substrate. The reference light sources are arranged in a central area on one surface of the substrate. The angle formed between the main light-emitting direction of light emitted from each light source and the main light-emitting direction of light from the reference light source is gradually increased from the reference light source toward the outer side. Accordingly, the light emitted from each light source is gradually increased from the reference light source toward the outer side. As a result, the luminance of the outer circumferential part of a liquid crystal display panel can be raised, and the luminance unevenness between the center part of a display area of the liquid crystal display panel and the outer circumferential part of the display area can be reduced to uniform the luminance in the display area. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure of an illumination device suitable for use in an electro-optical device or the like.

  Currently, a liquid crystal device as an example of an electro-optical device is widely used to display an image in electronic devices such as a mobile phone, a portable information terminal, and a computer display.

  In such a liquid crystal device, in order to perform transmissive display by illuminating the liquid crystal display panel from the back side, a backlight device (illumination device) is provided on the back side of the liquid crystal display panel. Such illumination devices are roughly classified into two types, a direct type and an edge light type, depending on the position of the light source with respect to the liquid crystal display panel or the like.

  The direct type lighting device is a lighting device of a type in which a light source is arranged on the back side of a liquid crystal display panel. On the other hand, an edge light type lighting device is a lighting device of a type in which a light guide plate that guides light is disposed on the back side of a liquid crystal display panel, and a light source is disposed on a side surface of the light guide plate. Among these, the direct type illumination device does not require a light guide plate as compared with the edge light type illumination device, and thus has an advantage that the cost can be reduced accordingly.

  For example, Patent Documents 1 and 2 describe a direct type backlight device.

  The backlight device described in Patent Literature 1 includes a diffusion plate that diffuses incident color light to emit planar light, a plurality of light emitting diodes that respectively emit at least red light, green light, and blue light incident on the diffusion plate; There is provided a light source unit having condensing means for condensing each color light emitted from the light emitting diodes at the same location on the diffusion plate to obtain white light. The light source unit has a plurality of condensing lenses for condensing each color light emitted from the plurality of light emitting diodes as a condensing unit, and each color light via the plurality of condensing lenses is on the diffusion plate. The optical axes of the plurality of light emitting diodes and the plurality of condensing lenses are arranged so as to be inclined at a predetermined angle so as to be condensed at the same location.

  With such a configuration, white light that is sufficiently mixed with no color unevenness is obtained, and an image with good color reproducibility can be displayed on the liquid crystal display panel by illuminating the liquid crystal display panel with the white light. .

  The backlight device described in Patent Document 2 includes a plurality of light emitting diodes as light sources and a light amount distribution that changes a spatial light amount distribution of light emitted from each light emitting diode by mechanically driving each light emitting diode. Adjusting means. And the light quantity distribution adjusting means is comprised from the base to which each light emitting diode was attached, and the rotating shaft which rotates a base. The light emitting diode includes a red light emitting diode that emits red light, a green light emitting diode that emits green light, and a blue light emitting diode that emits blue light.

  According to this configuration, the light quantity distribution adjusting means is driven, specifically, the red light emitting diode, the green light emitting diode, and the blue light emitting diode are inclined by rotating the pedestal around the rotation axis extending in the extending direction. It is possible to change the angle with time. Thereby, it is possible to adjust the color mixture state of the respective emission colors, and to suppress occurrence of color unevenness.

JP 2006-228576 A JP 2006-339047 A

  By the way, in the backlight device described in Patent Document 1 described above, the optical axes of the plurality of light emitting diodes and the plurality of condensing lenses are inclined at a predetermined angle so as to be condensed at the same location on the diffusion plate. Has been.

  For this reason, in this diffuser plate, the luminance is high in the region where the light emitted from the plurality of light emitting diodes is collected, but the luminance is low in the region where the light emitted from the plurality of light emitting diodes is not collected. In particular, the outer peripheral portion of the diffusion plate is a region where light emitted from a plurality of light emitting diodes is not collected, and the luminance is lower than the luminance in the region inside the outer peripheral portion of the diffusion plate. It is considered a thing.

  As described above, in the diffusion plate, when there are a high luminance region and a low luminance region, luminance unevenness occurs in the diffusion plate due to this. Then, in this backlight device, there is a possibility that light having uniform luminance cannot be irradiated toward the liquid crystal display panel through the diffusion plate.

  Further, in the backlight device described in Patent Document 2, the inclination angle of each light-emitting diode is changed over time by rotating the pedestal around a rotation shaft extending in the extending direction, thereby causing color unevenness. I try to suppress it. However, according to this configuration, it is difficult for light from each light-emitting diode to enter the region of the diffusion plate located on the extension line of the pedestal, and sufficient luminance may not be obtained. Accordingly, in this backlight device, similarly to the backlight device described in Patent Document 1 described above, there is a possibility that light with uniform luminance cannot be irradiated toward the liquid crystal display panel through the diffusion plate.

  The present invention has been made in view of the above points, and is a direct illumination device capable of irradiating light of uniform luminance toward an electro-optical panel, and an electro-optical device and an electronic apparatus using the same. It is an issue to provide.

  In one aspect of the present invention, the lighting device includes a plurality of light sources and a base material that holds the plurality of light sources, and each of the light sources is disposed on one surface side of the base material. The plurality of light sources include a reference light source that emits light in a normal direction of the substrate, and a main emission direction of light emitted from each of the light sources and a main emission direction of light of the reference light source The angle formed is larger as going from the reference light source toward the outer side.

  The illumination device includes a plurality of light sources and a base material that holds the plurality of light sources. As the light source, for example, an LED that emits white light is suitable. As the base material, for example, a wiring board is suitable. Each of the light sources is arranged (for example, dispersedly arranged) on one surface side of the substrate. The plurality of light sources include a reference light source that emits light in the normal direction of the substrate. The angle formed between the main emission direction of the light emitted from each of the light sources and the main emission direction of the light from the reference light source increases as it goes from the reference light source to the outer side (outer periphery, outer periphery, or outside). Here, the main emission direction of light is the main direction of travel of light rays. The axis in the main light emission direction is a virtual axis in the main light traveling direction. In a preferred example, the electro-optical device includes an electro-optical panel in which an electro-optical layer is sandwiched between a pair of substrates, and the above-described illumination device arranged on one surface side of the electro-optical panel.

  Thus, more light is emitted from each of the light sources as it goes from the reference light source to the outer side. As a result, the luminance of the outer side of the electro-optical panel (including the area near the boundary between the display area and the non-display area that does not contribute to display) can be increased, and the central portion of the display area of the electro-optical panel and its Luminance unevenness between the outer periphery of the display area can be suppressed, and the luminance in the display area of the electro-optical panel can be made uniform.

  In a preferred example, an angle formed between a central axis passing through the center of a region of light emitted from each of the light sources and a parallel line parallel to a normal line at the center of one surface of the base material is the base material. It is so large that it goes to at least one direction which goes to the outer side (an outer periphery, an outer peripheral part, or an outer side) from the center of one surface of.

  According to this, as it goes to at least one direction from the center of one surface of the substrate toward the outer side, more light is emitted from each of the light sources. As a result, the luminance of the outer periphery of the electro-optical panel (the area near the boundary between the display area and the non-display area that does not contribute to display and corresponding to the outer edge of the base material positioned in at least one direction) The luminance unevenness between the central part of the display area of the electro-optical panel and the outer peripheral part of the display area can be suppressed, and the luminance in the display area of the electro-optical panel can be made uniform. .

  In one aspect of the above illumination device, the reference light source is disposed in a central region of the substrate. As a result, more light is emitted from each of the light sources as it goes from the central region of the substrate toward its outer side.

  In another aspect of the illumination device, the angle of the light source with respect to the main light emission direction of the light from the reference light source sequentially increases toward the outer side of the substrate. Alternatively, the angle of the light source with respect to the main light emission direction of the light from the reference light source increases stepwise toward the outer side of the substrate. According to these aspects, more light is emitted from each of the light sources sequentially or step by step from the reference light source toward the outer side.

  In another aspect of the illumination device described above, a plurality of light source pattern regions having the reference light source are arranged on one surface side of the substrate. In a preferred example, the light source pattern region is preferably a light source unit including a plurality of light sources including a reference light source and a base material holding the plurality of light sources. According to this aspect, it can be suitably used as a lighting device for a large screen such as a personal computer.

  In another aspect of the illumination device, each of the light sources is arranged in a matrix or concentric form on one surface of the substrate.

  In another aspect of the above illumination device, the one surface of the base material has a plurality of recesses arranged in a matrix or concentric circles, and each of the recesses in the recess with respect to the one surface of the base material The inclination angle of the bottom surface is set to an angle that increases as the angle goes from the position where the reference light source is to be arranged on one surface of the substrate toward the outer side, and at least a part of each of the light sources is It arrange | positions at each in a recessed part.

  Thus, each of the light sources is held in the recess of the one surface of the base material so that the angle becomes an angle that increases toward the outer side from the position where the reference light source should be arranged on the one surface of the base material. It becomes easy to arrange | position on the one surface of a base material in the state which carried out.

  In a preferred example, it is preferable that the angle is set to an angle that increases as it goes in at least one direction from the center of one surface of the substrate toward the outer side.

  Thereby, each of the light sources is held in the recess of the one surface of the base material so that the angle becomes an angle that increases toward at least one direction from the center of one surface of the base material toward the outer side. It becomes easy to arrange | position on the one surface of a base material in a state.

  In another aspect of the illumination device described above, one surface of the base material has a convexly curved shape, and each of the light sources is disposed along one surface of the curved base material. ing.

  According to this aspect, in the manufacturing process of the illumination device, the main emission direction of the light emitted from each of the light sources and the main emission direction of the light of the reference light source are adjusted by appropriately adjusting the curvature of one surface of the base material. It becomes easy to increase the angle formed by and toward the outer side from the reference light source. Alternatively, an angle formed by a central axis passing through the center of the region of light emitted from each of the light sources and a parallel line parallel to a normal line at the center of one surface of the substrate is the center of one surface of the substrate. It becomes easier to increase the distance from one side to the other side toward the outer side. In addition, as a base material, the flexible substrate which has flexibility is suitable, for example.

  In another aspect of the illumination device described above, one surface of the base material may have a flat shape.

  In another aspect of the above lighting device, a member having a curved surface that curves in a convex shape is disposed on one surface of the base material, and each of the light sources is arranged in a matrix along the curved surface. Alternatively, they are arranged concentrically.

  In another aspect of the illumination device, one surface of the base material has a rectangular planar shape.

  In another aspect of the illumination device described above, each of the light sources has an angle that is at least line-symmetric with respect to a reference line passing through the reference light source disposed on one surface side of the base material. Arranged on one surface of the substrate.

  In another aspect of the illumination device described above, each of the light sources is configured so that one of the bases has an angle that is line-symmetric with respect to a center line passing through the center of one surface of the base. Arranged on the surface.

  In another aspect of the illumination device, each of the light sources is disposed on one surface side of the base material such that the angle is an angle that is point-symmetric with respect to a main light emission direction of the light of the reference light source. Has been.

  In another aspect of the illumination device, each of the light sources is disposed on one surface of the base material so that the angle is an angle that is point-symmetric with respect to the normal line of the base material.

  In another aspect of the illumination device, each of the light sources is disposed concentrically on one surface of the base material, and the group of the arrays arranged in a circle on one surface of the base material Each of the other group of the light sources arranged in a circle outside and adjacent to the light source is disposed at a corresponding position between each of the group of the light sources. In a preferred example, the arrangement density of the light sources with respect to one surface of the base material increases toward the corners of the one surface of the base material.

  According to this aspect, the luminance of the outer peripheral portion of the electro-optical panel can be further increased, and the luminance unevenness between the central portion of the display region of the electro-optical panel and the outer peripheral portion and each corner of the display region is further increased. Therefore, it is possible to make the luminance uniform in the display area of the electro-optical panel.

  In another aspect of the above illumination device, one surface of the substrate has a flat shape, and a holding member including a holding surface for holding each of the light sources is disposed on the one surface of the substrate ( For example, the inclination angle of each holding surface of the holding member with respect to one surface of the base material is arranged such that the reference light source on the one surface of the base material is arranged. The angle is set so as to increase from the power position toward the outer side, and each of the light sources is disposed in contact with the holding surface of each of the holding members, and the light emitted from each of the light sources. The main emission direction and each normal to the holding surface of each holding member are substantially parallel.

  According to this aspect, the angle formed between the main emission direction of the light emitted from each of the light sources and the main emission direction of the light of the reference light source increases as it goes from the position where the reference light source is to be arranged toward the outer side. In order to set, it is only necessary to arrange each of the light sources with respect to each holding surface of the holding member having a predetermined inclination angle with respect to one surface of the substrate. Therefore, the arrangement of the light source with respect to one surface of the substrate is facilitated.

  In another aspect of the above illumination device, one surface of the substrate has a flat shape, and a holding member including a holding surface for holding each of the light sources is disposed on the one surface of the substrate ( For example, the inclination angle of each holding surface of the holding member with respect to the one surface of the base material is such that the angle is at least from the center of the one surface of the base material toward the outer side. The angle is set so as to increase toward one direction, and each of the light sources is disposed in contact with the holding surface of each of the holding members, and the region of the light emitted from each of the light sources. A central axis passing through the center and each normal to the holding surface of each of the holding members are substantially parallel.

  According to this aspect, the angle formed by the central axis passing through the center of the region of the light emitted from each of the light sources and the parallel line parallel to the normal line at the center of one surface of the base material is set to one of the base materials. In order to set larger as it goes to at least one direction from the center of the surface to the outer side, a light source is provided for each holding surface of the holding member having a predetermined inclination angle with respect to one surface of the base material. It is only necessary to arrange each of them. Therefore, the arrangement of the light source with respect to one surface of the substrate is facilitated.

  In another aspect of the illumination device described above, a reflecting member that reflects light is disposed on one surface of the base material at a position that does not overlap each of the light sources in a planar manner. According to this, among the light emitted from each of the light sources, for example, the light reflected by hitting the electro-optical panel side can be reflected again to the electro-optical panel side by the reflecting member. As a result, the utilization efficiency of light emitted from each of the light sources can be increased, and the luminance of the electro-optical panel can be further increased.

  In another aspect of the present invention, an electro-optical panel comprising an electro-optical layer sandwiched between a pair of substrates, and any one of the illumination devices disposed on one surface side of the electro-optical panel. An optical device can be configured.

  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)
First, the configuration of a liquid crystal device 100 as an example of an electro-optical device according to the first embodiment of the present invention will be described with reference to FIG. 1 and FIG.

  FIG. 1 is a cross-sectional view illustrating a schematic configuration of a liquid crystal device 100 according to the first embodiment. FIG. 2A is a plan view of the illumination device 51 that is a constituent element of the liquid crystal device 100 from the observation side (the side visually recognized by the observer) of FIG. In FIG. 2A, when one outer side 12a of the substrate 12 having a rectangular planar shape is used as a reference, the outer sides 12b, 12c, and 12d are clockwise. 1 corresponds to a cross-sectional view along the center line (or reference line) L5 that bisects the line segment connecting the outer side 12a and the outer side 12c in FIG. 2A, and FIG. In (a), illustration of the various optical sheets and the support member 13 which are the elements of the illuminating device 51 is abbreviate | omitted for convenience.

  The liquid crystal device 100 includes a liquid crystal display panel 50 and a direct-type illumination device 51 that is disposed on the opposite side of the observation side of the liquid crystal display panel 50 and illuminates the liquid crystal display panel 50.

  The liquid crystal display panel 50 includes a first substrate 1 and a second substrate 2 that are bonded to each other via a frame-shaped sealing material 3, and a liquid crystal as an example of an electro-optical layer in a region partitioned by the sealing material 3. The layer 4 is sandwiched. On the surface of the liquid crystal display panel 50 on the liquid crystal layer 4 side, for example, many components such as a black matrix, a color filter, an electrode, and the like are formed in a matrix (lattice) or stripes (linear). In FIG. 1, illustration of those elements is omitted. A display area V1 for displaying an image is formed inside the sealing material 3 in the liquid crystal display panel 50, and an area between the outer edge of the liquid crystal display panel 50 and the display area V1 is displayed. The non-display area V2 does not contribute. 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 various optical sheets, a plurality of light sources 11, a substrate 12 as an example of a base material, and a support member (frame) 13. Here, the various optical sheets include a first diffusion plate 14 that diffuses light, a prism sheet 15 that collects light, and a second diffusion plate 16 that diffuses light. However, in the present invention, the configuration of various optical sheets is not limited to a specific configuration.

  The support member 13 has a rectangular planar shape and supports the substrate 12, and extends obliquely from the outer periphery of the flat portion to the outside and toward the first diffusion plate 14. And an extending portion 13b for supporting the optical sheet.

  The substrate 12 holds a plurality of light sources 11 and serves as a wiring substrate that supplies power to the plurality of light sources 11. The substrate 12 has a rectangular planar shape and a flat shape, and is disposed so as to overlap the flat portion 13 a of the support member 13. A plurality of concave portions 12fa for holding the plurality of light sources 11 are formed on one surface 12f of the substrate 12 in a dispersed manner.

  As the plurality of light sources 11, for example, light emitting diodes that emit white light are suitable. Each light source 11 is distributed and arranged on one surface 12f of the substrate 12 while being held in each recess 12fa provided on one surface 12f of the substrate 12. Light L (for example, white light) L emitted from each light source 11 is irradiated toward various optical sheets and the liquid crystal display panel 50. The arrangement structure of each light source 11 with respect to one surface 12f of the substrate 12 will be described later.

  The first diffusion plate 14 is supported by the end portion of the extending portion 13 b of the support member 13. For this reason, a space E having a constant distance d1 is formed between the first diffusion plate 14 and the substrate 12. Thus, the reason why the constant distance d1 is provided between the first diffusion plate 14 and the substrate 12 is that the light L emitted from each light source 11 is directed to the prism sheet 15 side by the first diffusion plate 14. This is to facilitate diffusion. The prism sheet 15 is disposed so as to overlap the surface of the first diffusion plate 14 on the liquid crystal display panel 50 side. The second diffusion plate 16 is disposed so as to overlap the surface of the prism sheet 15 on the liquid crystal display panel 50 side. In order to further diffuse the light L collected by the prism sheet 15, it is preferable that the second diffusion plate 16 has a higher light diffusion rate than the first diffusion plate 14.

  In the liquid crystal device 100 having the above configuration, the light L emitted from the plurality of light sources 11 travels toward the first diffusion plate 14 as indicated by the broken line arrows in FIG. The light L is diffused by being transmitted. The diffused light L is condensed by passing through the prism sheet 15, and the condensed light L travels toward the second diffusion plate 16. The condensed light L is diffused by passing through the second diffusion plate 16, and the diffused light L is irradiated toward the liquid crystal display panel 50. At this time, the orientation of the liquid crystal molecules of the liquid crystal layer 4 is controlled in the liquid crystal display panel 50, and a desired display image is visually recognized by an observer.

(Light source arrangement structure on the substrate)
Next, with reference to FIGS. 1 and 2, the arrangement structure of the light sources 11 with respect to the one surface 12 f of the substrate 12 in the illumination device 51 according to the first embodiment will be described.

  FIG. 2B is a schematic diagram showing the relationship between a region 11L of light L emitted from the light source 11 (in this example, an ellipsoidal region) 11L and a central axis (broken line portion) L3 passing through the center of the region 11L. FIG. In FIG. 2B, the central axis of the light source 11 and the central axis L3 of the region 11L of the light L are located on the same straight line. The central axis L3 is an axis (a virtual axis of the main traveling direction of the light L) in the main emission direction of the light L of the light source 11 (the main direction of traveling of the light L).

  In the first embodiment, the plurality of light sources 11 include a reference light source 11 b that emits light L in the direction of the normal L <b> 1 of the substrate 12. The reference light source 11b is arranged in a central region that passes through the center O of the substrate 12, for example. The light sources 11 are arranged in a matrix on one surface 12 f of the substrate 12. Specifically, a plurality of recesses 12fa arranged in a matrix are formed on one surface 12f of the substrate 12, and at least a part of each light source 11 is held in each recess 12fa. Each light source 11 passes through the center O of one surface 12f of the substrate 12 and passes through the center line from the outer side 12a to the outer side 12c (a center line that bisects a line segment connecting the outer side 12b and the outer side 12d or The reference line is disposed on one surface 12f of the substrate 12 so as to be at least line symmetric with respect to the center line L5 and the center line L5 that passes through the center O and extends from the outer side 12b to the outer side 12d. .

  In particular, in the present invention, the light L having a uniform luminance is illuminated on the display region V1 of the liquid crystal display panel 50, and the outer peripheral portion of the liquid crystal display panel 50 (the boundary between the display region V1 and the non-display region V2). The light source 11 is arranged in a state in which the inclination angle of each light source 11 is adjusted with respect to one surface 12f of the substrate 12 so that more light L is emitted from each light source 11 to a nearby region.

  Therefore, in the present invention, the main emission direction axis of the light L emitted from each light source 11 (the central axis L3, hereinafter also referred to as “main emission direction L3”) and the main light L of the reference light source 11b. The emission direction (normal line L1, hereinafter also referred to as “main emission direction L1”) or the angle formed by the parallel emission line L2 parallel to the main emission direction L1 is determined from the reference light source 11b to the outer sides 12a, 12b, 12c. , 12d is set so as to increase in the at least one direction. That is, the center axis L3 passing through the center of the region 11L of the light L emitted from each light source 11 and the normal line L1 at the center O of one surface 12f of the substrate 12 or a parallel line L2 parallel to the normal line L1 are formed. The angle is set so as to increase toward the at least one direction from the center O of one surface 12f of the substrate 12 toward the outer sides 12a, 12b, 12c, 12d.

  In order to realize this, in the first embodiment, the inclination angle of the bottom surface of each recess 12fa that holds each light source 11 with respect to one surface 12f of the substrate 12 is the main emission direction of the light L emitted from each light source 11. The position at which the reference light source 11b is to be disposed on the one surface 12f of the substrate 12 by the angle formed by L3 and the main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1). (Alternatively, the angle formed by the central axis L3 and the parallel line L2 of the region 11L of the light L of each light source 11 is set to an angle that increases with increasing distance from the central line L4 to the outer sides 12b and 12d. . As a result, each light source 11 is placed on one surface 12f of the substrate 12 so that the angle is symmetric with respect to each of the center lines L4 and L5 passing through the center O of the one surface 12f of the substrate 12. It becomes easy to arrange.

  Specifically, in the first embodiment, the main emission direction L3 of the light L emitted from each light source 11 and the main emission direction L1 of the light L of the reference light source 11b (or parallel lines parallel to the main emission direction L1). The angle formed by L2) is set to increase as it goes from the center line L4 passing through the reference light source 11b toward each of the outer sides 12b and 12d. In other words, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is outside the center line L4 with reference to the center line L4 passing through the center O of the one surface 12f of the substrate 12. It is set so as to increase toward each of the sides 12b and 12d.

  That is, in the first embodiment, when the center line L4 of the one surface 12f of the substrate 12 is used as a reference, the light source 11 group disposed in the region on the outer side 12b side from the center line L4 is outside the center line L4. The light source 11 group that is set larger toward the side 12b, that is, toward the direction of the arrow Y1 in FIG. 2A, and the light source 11 group arranged in the region on the outer side 12d side from the center line L4 is located outside the center line L4. It is set to be larger toward the side 12b, that is, toward the direction of the arrow Y2 in FIG.

  More specifically, each of the group of light sources 11s including the reference light source 11b positioned at the most central portion on the one surface 12f of the substrate 12 and arranged from the outer side 12a to the outer side 12c The angle formed by the central axis L3 of the region 11L and the parallel line L2 is set to 0 [°]. That is, in the group of light sources 11s, the central axis L3 and the parallel line L2 of the region 11L of the light L of each light source 11 are located on the same straight line.

  A group of light sources 11t arranged at positions sandwiching the group of light sources 11s and arranged from the outer side 12a to the outer side 12c and inclined from the center line L4 toward the outer side 12b and the outer side 12d, respectively. Then, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is set to α (> 0 [°]). A group of light sources 11u arranged at positions sandwiching the group of light sources 11t and arranged from the outer side 12a to the outer side 12c and inclined from the center line L4 toward the outer side 12b and the outer side 12d. Then, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is set to β (> α). In addition, a group of light sources 11v arranged at positions sandwiching the group of light sources 11u and arranged from the outer side 12a to the outer side 12c and inclined from the center line L4 toward the outer side 12b and the outer side 12d, respectively. Then, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is set to γ (> β). In addition, a group of light sources 11w arranged at positions sandwiching the group of light sources 11v and arranged from the outer side 12a to the outer side 12c and inclined from the center line L4 toward the outer side 12b and the outer side 12d, respectively. Then, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is set to θ (> γ). In addition, the inclination angle of each light source 11 with respect to the normal L1 that is the main emission direction of the light L of the reference light source 11b increases sequentially or stepwise toward the outer sides 12b and 12d of the substrate 12.

  With this configuration, in the liquid crystal device 100 according to the first embodiment, the liquid crystal display panel 50 is directed toward the liquid crystal display panel 50 sequentially or stepwise from the center line L4 where the reference light source 11b is located toward each of the outer side 12b and the outer side 12d. Thus, more light L is emitted from each light source 11. As a result, the luminance of the outer peripheral portion of the liquid crystal display panel 50 (the region near the boundary between the display region V1 and the non-display region V2 and corresponding to the outer sides 12b and 12d) can be increased. The luminance unevenness between the central portion of the display region V1 of the liquid crystal display panel 50 and the outer peripheral portion of the display region V1 can be suppressed, and the luminance in the display region V1 of the liquid crystal display panel 50 can be made uniform.

  In the illuminating device 51 according to the first embodiment, the reflecting member (rectangular broken line region in FIG. 1) that reflects light on the one surface 12f of the substrate 12 at a position that does not overlap the light sources 11 in a planar manner. 70 may be arranged. According to this, light reflected from the light L emitted from each light source 11 by hitting the first diffusion plate 14 or the like is reflected again by the reflecting member 70 toward the first diffusion plate 14 or the like. Can do. As a result, the utilization efficiency of the light L emitted from each light source 11 can be increased, and the luminance of the liquid crystal display panel 50 can be further increased.

[Second Embodiment]
Next, the configuration of the liquid crystal device 100a according to the second embodiment of the present invention will be described with reference to FIG.

  FIG. 3 is a cross-sectional view showing a configuration of a liquid crystal device 100a according to the second embodiment corresponding to FIG.

  When comparing 2nd Embodiment and 1st Embodiment, both differ only in the structure of an illuminating device, and other than that is the same. Therefore, below, the same code | symbol is attached | subjected about the element same as 1st Embodiment, and the description is abbreviate | omitted suitably.

  In the illumination device 51 according to the first embodiment, the substrate 12 has a flat shape. On the other hand, in the illuminating device 51a according to the second embodiment, the substrate 12 has a shape curved in a convex shape toward the various optical sheets and the liquid crystal display panel 50 side. Each light source 11 is arranged on one surface 12f of the substrate 12 in the same arrangement as in the first embodiment, and the main emission direction L3 of the light L emitted from each light source 11 and the reference light source 11b. The angle formed by the main emission direction L1 of the light L (or a parallel line L2 parallel to the main emission direction L1) is set to increase as it goes from the center line L4 passing through the position of the reference light source 11b toward each of the outer sides 12b and 12d. Has been. That is, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is directed from the center line L4 passing through the center O of one surface 12f of the substrate 12 to each of the outer sides 12b and 12d. It is set so large. In addition, the inclination angle of each light source 11 with respect to the normal L1 that is the main emission direction of the light L of the reference light source 11b increases sequentially or stepwise toward the outer sides 12b and 12d of the substrate 12. In addition, as the board | substrate 12, the flexible board | substrate which has flexibility is suitable, for example. In this case, various optical sheets and the liquid crystal display panel 50 protrude between the substrate 12 and the flat portion 13a of the support member 13 so that the flexible substrate 12 can maintain the curved shape described above. It is preferable that a member (for example, a resin member having light or thermosetting property) 18 having a curved shape is disposed.

  In the second embodiment, by appropriately adjusting the curvature of the one surface 12f of the substrate 12 in the manufacturing process of the lighting device 51a, the main emission direction L3 of the light L emitted from each light source 11 and the reference light source 11b. The angle formed by the main emission direction L1 of the light L (or a parallel line L2 parallel to the main emission direction L1) is set to increase as it goes from the center line L4 passing through the reference light source 11b toward the outer sides 12b and 12d. Becomes easy. In other words, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is set to each of the outer sides 12b and 12d from the center line L4 passing through the center O of the one surface 12f of the substrate 12. It becomes easier to set larger as it goes. As a result, the same operational effects as those of the first embodiment described above can be obtained.

  In the illumination device 51a according to the second embodiment, in order to achieve the same object as the first embodiment described above, the one surface 12f of the curved substrate 12 is positioned so as not to overlap the light sources 11 in a plane. A reflecting member (rectangular broken line region in FIG. 3) 70 that reflects light may be disposed.

[Third embodiment]
Next, the configuration of the liquid crystal device 100b according to the third embodiment of the present invention will be described with reference to FIG.

  FIG. 4 is a cross-sectional view showing a configuration of a liquid crystal device 100b according to the third embodiment corresponding to FIG.

  When the third embodiment is compared with the first embodiment, both are different only in the configuration of the illumination device, and are otherwise the same. Therefore, below, the same code | symbol is attached | subjected about the element same as 1st Embodiment, and the description is abbreviate | omitted suitably.

  In the illuminating device 51b according to the third embodiment, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 passes through the center O of one surface 12f of the substrate 12, and the reference light source 11b. According to the first embodiment, the holding member 19 for holding each light source 11 is provided so as to increase from the center line L4 passing through the position to the outer sides 12b and 12d. The configuration is different from that of the illumination device 51, and other configurations are the same as those of the illumination device 51 according to the first embodiment.

  Specifically, in the illumination device 51b, the holding members 19 including the holding surfaces 19a that can hold the light sources 11 are arranged in a distributed manner on one surface 12f of the substrate 12. In this example, although not shown, the holding members 19 are arranged in a matrix on one surface 12f of the substrate 12 so as to be symmetrical with respect to the center lines L4 and L5 of the substrate 12, respectively. . Each light source 11 is disposed in contact with the holding surface 19 a of each holding member 19. Further, one surface 12f of the substrate 12 is set so that the main emission direction L3 of the light L emitted from each light source 11 and each normal line (not shown) with respect to the holding surface 19a of each holding member 19 are substantially parallel. The inclination angle of the holding surface 19a of each holding member 19 is adjusted. In other words, the central axis L3 passing through the center of the region 11L of the light L emitted from each light source 11 and each normal line (not shown) with respect to the holding surface 19a of each holding member 19 holding each light source 11 are substantially parallel. The inclination angle of the holding surface 19a of each holding member 19 with respect to the one surface 12f of the substrate 12 is adjusted so that.

  That is, the inclination angle of the holding surface 19a of each holding member 19 with respect to the one surface 12f of the substrate 12 is such that the main emission direction L3 of the light L emitted from each light source 11 and the main emission direction of the light L of the reference light source 11b. An angle formed by L1 (or a parallel line L2 parallel to the main emission direction L1) increases toward the outer sides 12b and 12d from the position where the reference light source 11b on the one surface 12f of the substrate 12 is to be disposed. The angle is set as set. In other words, the angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 extends from the center line L4 passing through the center O of one surface 12f of the substrate 12 to each of the outer sides 12b and 12d. The angle is set so as to increase as it goes. In addition, the inclination angle of each light source 11 with respect to the normal L1 that is the main emission direction of the light L of the reference light source 11b increases sequentially or stepwise toward the outer sides 12b and 12d of the substrate 12.

  According to this configuration, the main emission direction L3 of the light L emitted from each light source 11 and the main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1) are formed. In order to set the angle to be larger toward the outer sides 12b and 12d from the position where the reference light source 11b is to be disposed, each holding member 19 having a predetermined inclination angle with respect to one surface 12f of the substrate 12 is set. It is only necessary to arrange each light source 11 with respect to the holding surface 19a. Alternatively, the angle formed by the central axis L3 of the region 11L of the light L emitted from each light source 11 and the parallel line L2 of the one surface 12f of the substrate 12 is outside the center line L4 of the one surface 12f of the substrate 12. In order to increase the distance toward the sides 12b and 12d, each light source 11 is arranged on the holding surface 19a of each holding member 19 having a predetermined inclination angle with respect to one surface 12f of the substrate 12. Just do it. Therefore, the arrangement of the light sources 11 with respect to the one surface 12f of the substrate 12 is facilitated. Thereby, the same effect as 1st Embodiment mentioned above can be acquired.

  In the illumination device 51b according to the third embodiment, in order to achieve the same object as that of the first embodiment described above, the light is placed on the one surface 12f of the substrate 12 at a position that does not overlap the light sources 11 in a planar manner. A reflecting member (rectangular broken line region in FIG. 4) 70 may be disposed.

[Modification]
In the illumination devices 51, 51a, 51b according to the first to third embodiments (hereinafter referred to as “illumination device 60” as a representative), the main emission direction L3 of the light L emitted from each light source 11, The angle formed by the main emission direction L1 of the light L of the reference light source 11b (or the parallel line L2 parallel to the main emission direction L1), that is, the central axis L3 and the parallel line L2 of the region 11L of the light L of each light source 11 Is set so as to increase from the center line L4 passing through the center O of the one surface 12f of the substrate 12 toward the outer sides 12b and 12d. However, in the present invention, the arrangement structure of the light sources 11 with respect to the one surface 12f of the substrate 12 is not limited to these configurations. Hereinafter, the arrangement structure of each light source 11 with respect to one surface 12f of the substrate 12 according to various modifications will be described.

(Modification 1)
First, with reference to Fig.5 (a), the structure of the illuminating device 60s which concerns on the modification 1 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  Fig.5 (a) shows the planar structure of 60 s of illuminating devices which concern on the modification 1 corresponding to Fig.2 (a). However, in FIG. 5A, for the sake of convenience, illustration of various optical sheets and supporting members 13 that are elements of the illumination device 60 s according to Modification 1 is omitted, and the optical sheet is disposed on one surface 12 f of the substrate 12. The number of the light sources 11 to be reduced is smaller than that of the lighting device 60.

  In the illuminating device 60s according to the modified example 1, each light source 11 has a main emission direction L3 of the light L emitted from each light source 11 and the light of the reference light source 11b as shown by the directions of arrows Y3 and Y4 in the drawing. An angle formed by the main emission direction L1 of L (or a parallel line L2 parallel to the main emission direction L1), that is, an angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is The substrates 12 are arranged in a matrix on one surface 12f of the substrate 12 so that the angles are symmetrical with respect to the center lines L4 and L5 passing through the center O of the one surface 12f of the substrate 12. Specifically, an angle formed between the main emission direction L3 of the light L emitted from each light source 11 and the main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1), That is, the angle formed between the central axis L3 of the light L region 11L of each light source 11 and the parallel line L2 is as shown by the directions of arrows Y3 and Y4 in FIG. The distance from the center line L5 increases toward the outer sides 12a and 12c.

  Thereby, in the modification 1, as it goes to each of the outer sides 12a and 12c from the center line L5 passing through the reference light source 11b, more light L is emitted from each light source 11 toward the liquid crystal display panel 50 side. become. As a result, the brightness of the outer peripheral portion of the liquid crystal display panel 50 (the region near the boundary between the display region V1 and the non-display region V2 and corresponding to the outer sides 12a and 12c) can be increased. The luminance unevenness between the central portion of the display region V1 of the liquid crystal display panel 50 and the outer peripheral portion of the display region V1 can be suppressed, and the luminance in the display region V1 of the liquid crystal display panel 50 can be made uniform.

(Modification 2)
Next, with reference to FIG.5 (b), the structure of the illuminating device 60t which concerns on the modification 2 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  FIG. 5B shows a planar configuration of the illumination device 60t according to the modification 2 corresponding to FIG. However, in FIG.5 (b), illustration of the various optical sheets and the supporting member 13 which are the elements of the illuminating device 60t which concerns on the modification 2 is abbreviate | omitted for convenience.

  In the illuminating device 60t according to the modified example 2, each light source 11 has the main emission direction L3 of the light L emitted from each light source 11 and the light of the reference light source 11b as shown in the directions of arrows Y1 to Y8 in the drawing. An angle formed by the main emission direction L1 of L (or a parallel line L2 parallel to the main emission direction L1), that is, an angle formed by the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2 is The light sources L of the reference light source 11b are arranged in a matrix on one surface 12f of the substrate 12 so as to have an angle symmetric with respect to the main emission direction (normal line) L1 of the light L. Specifically, an angle formed between the main emission direction L3 of the light L emitted from each light source 11 and the main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1), That is, the angle formed between the central axis L3 of the light L region 11L of each light source 11 and the parallel line L2 is as shown by the directions of arrows Y1 to Y8 in FIG. The distance from the center O to the outer sides 12a, 12b, 12c and 12d and each corner of the substrate 12 is set larger.

  Accordingly, in the second modification, the liquid crystal display panel 50 is moved from the center O where the reference light source 11b is located on one surface 12f of the substrate 12 toward each of the outer sides 12a, 12b, 12c and 12d and each corner of the substrate 12. More light L is emitted from each light source 11 toward the side. As a result, the luminance of the outer peripheral portion of the liquid crystal display panel 50 (the region near the boundary between the display region V1 and the non-display region V2) can be increased, and the central portion of the display region V1 of the liquid crystal display panel 50 and its Brightness unevenness between the outer periphery of the display area V1 can be further suppressed, and the brightness in the display area V1 of the liquid crystal display panel 50 can be made more uniform.

(Modification 3)
Next, with reference to Fig.6 (a), the structure of the illuminating device 60u which concerns on the modification 3 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  Fig.6 (a) shows the plane structure of the illuminating device 60u which concerns on the modification 3 corresponding to Fig.5 (a). However, in FIG. 6A, illustration of various optical sheets and the support member 13 which are elements of the illumination device 60u according to the modification 3 is omitted for convenience. In FIG. 6A, a virtual concentric circle is indicated by a broken line.

  In the illuminating device 60u which concerns on the modification 3, each light source 11 is arrange | positioned concentrically on one surface 12f of the board | substrate 12 via each recessed part 12fa. Each light source 11 has a main emission direction L3 of the light L emitted from each light source 11 and a main emission direction L1 of the light L of the reference light source 11b (or as indicated by the directions of arrows Y1 and Y2 in the figure). The angle formed between the main emission direction L1 and the parallel line L2), that is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, is on one surface 12f of the substrate 12. The reference light source 11b is arranged on one surface 12f of the substrate 12 so as to have an angle that is line symmetric with respect to each of the center lines L4 and L5 passing through the center O where the reference light source 11b is located. Specifically, each light source 11 has a main emission direction L3 of the light L emitted from each light source 11, and a main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1). , That is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, the center line passing through the center O where the reference light source 11b is located on one surface 12f of the substrate 12. It is set so as to increase from L4 toward each of the outer sides 12b and 12d. Thereby, substantially the same operation effect as the above-mentioned 1st Embodiment can be acquired.

(Modification 4)
Next, with reference to FIG.6 (b), the structure of the illuminating device 60v which concerns on the modification 4 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  FIG. 6B shows a planar configuration of the illumination device 60v according to the modification 4 corresponding to FIG. However, in FIG.6 (b), illustration of the various optical sheets and the supporting member 13 which are the elements of the illuminating device 60v which concerns on the modification 4 is abbreviate | omitted for convenience. In FIG. 6B, a virtual concentric circle is indicated by a broken line.

  In the illuminating device 60v according to the modified example 4, as in the modified example 3, the light sources 11 are arranged concentrically on the one surface 12f of the substrate 12 via the recessed portions 12fa. Each light source 11 has a main emission direction L3 of the light L emitted from each light source 11 and a main emission direction L1 of the light L of the reference light source 11b (or as indicated by the directions of arrows Y3 and Y4 in the figure). The angle formed between the main emission direction L1 and the parallel line L2), that is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, is on one surface 12f of the substrate 12. The reference light source 11b is arranged on one surface 12f of the substrate 12 so as to have an angle that is line symmetric with respect to each of the center lines L4 and L5 passing through the center O where the reference light source 11b is located. Specifically, each light source 11 has a main emission direction L3 of the light L emitted from each light source 11, and a main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1). , That is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, the center line passing through the center O where the reference light source 11b is located on one surface 12f of the substrate 12. It is set so as to increase from L5 to each of the outer sides 12a and 12c. Thereby, substantially the same operation effect as the above-mentioned modification 1 can be obtained.

(Modification 5)
Next, with reference to FIG.6 (c), the structure of the illuminating device 60w which concerns on the modification 5 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  FIG. 6C shows a planar configuration of the illumination device 60w according to the modified example 5 corresponding to FIG. However, in FIG.6 (c), illustration of the various optical sheets and the supporting member 13 which are the elements of the illuminating device 60w which concerns on the modification 5 is abbreviate | omitted for convenience. In FIG. 6C, a virtual concentric circle is indicated by a broken line.

  In the illuminating device 60w according to the modified example 5, as in the modified example 3, the light sources 11 are arranged concentrically on the one surface 12f of the substrate 12 via the recessed portions 12fa. Each light source 11 has a main emission direction L3 of the light L emitted from each light source 11 and a main emission direction L1 of the light L of the reference light source 11b (or as indicated by the directions of arrows Y1 to Y8 in the figure). The angle formed between the main emission direction L1 and the parallel line L2), that is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, is the main light L of the reference light source 11b. It arrange | positions at one surface 12f of the board | substrate 12 so that it may become an angle which makes point symmetry with respect to the output direction (normal line) L1. Specifically, each light source 11 has a main emission direction L3 of the light L emitted from each light source 11, and a main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1). , That is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, the outer side 12a from the center O where the reference light source 11b is located on one surface 12f of the substrate 12. , 12b, 12c, and 12d and the corners of the substrate 12 are set to be larger. Thereby, substantially the same operation effect as the above-mentioned modification 2 can be obtained.

(Modification 6)
Next, with reference to FIG. 7, the structure of the illuminating device 60x which concerns on the modification 6 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  FIG. 7 shows a planar configuration of an illuminating device 60x according to Modification 6 corresponding to FIG. However, in FIG. 7, illustration of various optical sheets and the support member 13 that are elements of the illumination device 60 x according to the modification 6 is omitted for convenience. In FIG. 7, virtual concentric circles are indicated by broken lines.

  In the illuminating device 60x according to the modified example 6, as in the modified example 3, the light sources 11 are arranged concentrically on the one surface 12f of the substrate 12 via the recessed portions 12fa. In addition, on one surface 12f of the substrate 12, each of the other group of light sources 11 arranged in a circle at a position adjacent to the outside and adjacent to the group of light sources 11 arranged in a circle is the group of light sources 11. It arrange | positions in the position corresponding between each of the light sources 11. FIG.

  Each light source 11 has a main emission direction L3 of the light L emitted from each light source 11 and a main emission direction L1 of the light L of the reference light source 11b (or as indicated by the directions of arrows Y1 to Y8 in the figure). The angle formed between the main emission direction L1 and the parallel line L2), that is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, is the main light L of the reference light source 11b. It arrange | positions at one surface 12f of the board | substrate 12 so that it may become an angle which makes point symmetry with respect to the output direction (normal line) L1. Specifically, each light source 11 has a main emission direction L3 of the light L emitted from each light source 11, and a main emission direction L1 of the light L of the reference light source 11b (or a parallel line L2 parallel to the main emission direction L1). , That is, the angle formed between the central axis L3 of the region 11L of the light L of each light source 11 and the parallel line L2, the outer side 12a from the center O where the reference light source 11b is located on one surface 12f of the substrate 12. , 12b, 12c, and 12d and the corners of the substrate 12 are set to be larger. Further, the arrangement density of the light sources 11 with respect to the one surface 12f of the substrate 12 increases toward the respective corners of the one surface 12f of the substrate 12.

  With this configuration, the liquid crystal display panel 50 is directed toward the outer sides 12a, 12b, 12c and 12d and the corners of the substrate 12 from the center O where the reference light source 11b is located on one surface 12f of the substrate 12. More light L is emitted from each light source 11, and the brightness of each corner area of the display area V1 of the liquid crystal display panel 50 can be further increased. Thereby, the luminance of the outer peripheral portion of the liquid crystal display panel 50 (region near the boundary between the display region V1 and the non-display region V2) can be increased, and the central portion of the display region V1 of the liquid crystal display panel 50 and its Brightness unevenness between the outer periphery of the display area V1 can be further suppressed, and the brightness in the display area V1 of the liquid crystal display panel 50 can be made more uniform.

(Modification 7)
Next, with reference to Fig.8 (a), the structure of the illuminating device 60y which concerns on the modification 7 of this invention is demonstrated easily. In addition, below, description is abbreviate | omitted about the point which is common in 1st thru | or 3rd embodiment.

  FIG. 8A shows a planar configuration of the illumination device 60y according to the modified example 7. FIG. However, in FIG. 8A, illustration of various optical sheets and the like is omitted for convenience.

  The illuminating device 60y according to the modified example 7 is configured by arranging a plurality of light source pattern regions having the reference light source 11b on the one surface 12f side of each substrate 12. Specifically, the illuminating device 60y is provided corresponding to each light source pattern area, a plurality of light source pattern areas (in this example, light source pattern areas E1 to E4), a support member 13 on which each light source pattern area is arranged, and Various optical sheets (not shown). Here, the light source pattern region may be a light source unit configured to include a plurality of substrates 12 and a plurality of light sources 11 including a reference light source 11b arranged on one surface 12f side of each substrate 12. preferable. The arrangement configuration of the plurality of light sources 11 with respect to the one surface 12f side of each substrate 12 may be any of the configurations of the first to third embodiments or the first to sixth modifications. . In a preferred example, the arrangement configuration of the plurality of light sources 11 with respect to the one surface 12f side of each substrate 12 is all the same lighting device (for example, all of the regions E1 to E4 are lighting devices 60w, etc.). preferable. According to this configuration, it can be suitably used as a large screen lighting device such as a personal computer.

  In the present invention, the light source pattern areas E1 to En (n is a natural number) described above may be strip-shaped areas. In this case, in the present invention, as shown in FIG. 8B, the illumination device 60z arranges strip-like light source pattern regions E1 to En (n is a natural number) in parallel with the support member 13. It doesn't matter.

(Other variations)
The present invention is not limited to the configurations of the illumination devices according to the first to third embodiments and the illumination devices according to the first to seventh modifications, and various modifications are made without departing from the spirit of the present invention. It is possible.

  For example, in the present invention, on the assumption that the plurality of light sources 12 can emit light L toward the liquid crystal display panel 50 side, if the emission directions of the light L are the same, It is not essential to be on the surface 12f. Further, in the present invention, on the assumption that the plurality of light sources 12 can emit the light L toward the liquid crystal display panel 50 side, the holding member 19 or the like is provided directly on the side surface of the substrate 12 or the like. It may be arranged via.

  In the present invention, the number of light sources 11, the shape, the type of emission color, etc. are not limited. In the present invention, the planar shape and number of the substrates 12 are not limited. Furthermore, in the present invention, the display device as an example of the electro-optical device is not limited to the liquid crystal device, and may be an organic electroluminescence display device, a plasma display device, a field emission display device, or the like.

[Electronics]
Next, a liquid crystal device including any of the illumination devices according to the first to third embodiments described above and the illumination devices according to the above-described modifications 1 to 7 (hereinafter referred to as “liquid crystal device 1000” as a representative). A specific example of an electronic apparatus provided with the above will be described with reference to FIGS.

  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. 9A 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. 9B is a perspective view showing the configuration of this 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.

  Note that examples of the electronic apparatus to which the liquid crystal device 1000 according to the present invention can be applied include a liquid crystal television and a viewfinder type in addition to the personal computer shown in FIG. 9A 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 cross-sectional view illustrating a configuration of a liquid crystal device including an illumination device according to a first embodiment of the present invention. The figure which shows the arrangement structure etc. of the light source in the illuminating device which concerns on 1st Embodiment. Sectional drawing which shows the structure of a liquid crystal device provided with the illuminating device which concerns on 2nd Embodiment. Sectional drawing which shows the structure of a liquid crystal device provided with the illuminating device which concerns on 3rd Embodiment. The top view which shows the arrangement structure of the light source in the illuminating device which concerns on the modifications 1 and 2. FIG. The top view which shows the arrangement structure of the light source in the illuminating device which concerns on the modification 3 thru | or 5. The top view which shows the arrangement structure of the light source in the illuminating device which concerns on the modification 6. FIG. The top view which shows the arrangement structure of the light source in the illuminating device which concerns on the modified example 7 grade | etc.,. FIG. 14 is a perspective view of an electronic device including the liquid crystal device of the invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 Light source, 11L light area | region, 12 board | substrate (base material), 12f one side, 12fa recessed part, 13 support member, 14 1st diffuser plate, 15 prism sheet, 16 2nd diffuser plate, 50 liquid crystal display panel, 51, 51a, 51b, 60, 60s, 60t, 60u, 60v, 60w, 60x, 60y, 60z Illumination device, 70 Reflective member, 100, 100a, 100b Liquid crystal device, E space, O center, L1 normal, L2 parallel Line, L3 center axis, L4, L5 center line, V1 display area, V2 non-display area

Claims (16)

Multiple light sources;
A substrate for holding the plurality of light sources,
Each of the light sources is disposed on one surface side of the substrate,
The plurality of light sources includes a reference light source that emits light in a normal direction of the base material,
An illuminating device characterized in that an angle formed between a main emission direction of light emitted from each of the light sources and a main emission direction of light of the reference light source increases toward the outer side from the reference light source.   The lighting device according to claim 1, wherein the reference light source is disposed in a central region of the base material.   The illumination device according to claim 1, wherein an angle of the light source with respect to a main emission direction of light of the reference light source is sequentially increased toward an outer side of the base material.   The illumination device according to claim 1, wherein an angle of the light source with respect to a main light emission direction of the reference light source increases stepwise toward an outer side of the base material.   The lighting device according to claim 1, wherein a plurality of light source pattern regions having the reference light source are arranged on one surface side of the substrate.   5. The illumination device according to claim 1, wherein each of the light sources is arranged in a matrix or a concentric pattern on one surface of the base material. On one surface of the substrate, there are a plurality of recesses arranged in a matrix or concentric circles,
The inclination angle of each bottom surface in the recess with respect to one surface of the substrate is such that the angle increases toward the outer side from the position where the reference light source is to be disposed on the one surface of the substrate. Set,
The lighting device according to claim 1, wherein at least a part of each of the light sources is disposed in each of the recesses. One surface of the substrate has a shape that curves convexly,
5. The illumination device according to claim 1, wherein each of the light sources is disposed along one surface of the curved base material.   Each of the light sources is arranged on one surface of the substrate so that the angle is at least a line symmetry with respect to a reference line passing through the reference light source disposed on one surface side of the substrate. The illuminating device according to claim 1, wherein the illuminating device is provided.   Each of the light sources is arranged on one surface side of the base material so that the angle is an angle that is point-symmetric with respect to a main emission direction of light of the reference light source. The illumination device according to any one of 1 to 4. Each of the light sources is arranged concentrically on one surface of the substrate,
On the one surface of the base material, each of the other group of the light sources arranged in a circle outside and adjacent to the group of the light sources arranged in a circle is the group of the light sources. The lighting device according to claim 1, wherein the lighting device is disposed at a position corresponding to each other. 5. The lighting device according to claim 1, wherein an arrangement density of the light sources with respect to one surface of the base material increases toward each corner of the one surface of the base material. One surface of the substrate has a flat shape,
A holding member having a holding surface that holds each of the light sources is disposed on one surface of the base material,
The inclination angle of each holding surface of each of the holding members with respect to the one surface of the base material increases as the angle moves from the position where the reference light source is to be disposed on the one surface of the base material to the outer side. Set to an angle,
Each of the light sources is disposed in contact with the holding surface of each of the holding members, and the main emission direction of light emitted from each of the light sources and the holding surface of each of the holding members The lighting device according to claim 1, wherein each normal line is substantially parallel to each other.   The reflective member which reflects light is arrange | positioned in the position which does not overlap with each of the said light sources on one side of the said base material, The Claim 1 thru | or 13 characterized by the above-mentioned. The lighting device described.   An electro-optical panel having an electro-optical layer sandwiched between a pair of substrates, and the illumination device according to claim 1 disposed on one surface side of the electro-optical panel. An electro-optical device.   An electronic apparatus comprising the electro-optical device according to claim 15 as a display unit.

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