JP2018032587A - LIGHTING DEVICE AND DISPLAY DEVICE PROVIDED WITH LIGHTING DEVICE - Google Patents

Abstract

[PROBLEMS] To provide a lighting device in which a backlight has a plurality of light sources, an optical member, and a support member that defines the spacing between the plurality of light sources and the optical member, and in which light can be preferably incident on the optical member. intended to provide SOLUTION: An illumination device 100 of the present invention includes a base member 71 on which a plurality of light sources are arranged, and an optical sheet transmitting light emitted from the plurality of light sources provided on the front surface of the base member 71 with a diffusion distance D1 apart. 40, and a support member 90 that is fixed to the base member 71 and supports the optical sheet 40. The support member 90 is located between the green LED light source 62A and the green LED light source 62A from the diffusion distance D1. The supporting member 90 is arranged between the green LED light source 62D arranged at a short distance, and the diameter of the supporting member 90 is 30% or less of the distance between the green LED light source 62A and the green LED light source 62D. [Selection diagram] Fig. 3

Description

  The present invention relates to an illumination device including a light source and a display device including the illumination device.

  There is a transmissive display using a backlight (illumination device) including a light source and a transmissive display panel that transmits light emitted from the backlight and displays an image on the front side. As the backlight, there is a direct type backlight in which a plurality of light sources are arranged on the back side of the display panel. In a direct type backlight, an optical sheet that diffuses and collects light and transmits it may be provided so that light emitted from a light source is incident on the display panel with a suitable distribution. In addition, there is a technique for suppressing unevenness of light emitted from a light source by separating the light source from the optical sheet by a distance determined by optical characteristics. At this time, in order to secure the distance between the light source and the optical sheet, a support member (spacer) may be used.

  Patent Document 1 discloses a backlight device having a plurality of light emitting diode units including red, green, and blue light emitting diodes (light sources). Patent Document 1 discloses that an optical stud member (support member) that supports the diffusion plate is provided at a position where the distances from four adjacent light emitting diode units are substantially equal.

JP 2008-152101 A

  However, in the illumination device disclosed in Patent Document 1, since the interval between adjacent light emitting diodes is longer than the distance between the reflecting plate and the diffusing plate, the light of each color emitted from each light emitting diode is sufficiently diffusely mixed. Without being incident on the diffuser plate. Furthermore, when the arrangement density of the light emitting diode units is increased with respect to Patent Document 1, light emitted from the light emitting diode units may be blocked by the optical stud member, and a shadow may be generated.

  In view of the above problems, the present invention provides a lighting device capable of suitably allowing light to enter an optical member in a backlight having a plurality of light sources and a support member that defines a distance between the optical members. With the goal.

  One form of the illumination device of the present invention includes a base member on which a plurality of light sources are arranged, and an optical sheet that transmits light emitted from the plurality of light sources provided at a predetermined distance on the front surface of the base member. A support member that is fixed to the base member and points to the optical sheet, wherein the support member is a first light source of the plurality of light sources, the first light source, and the predetermined distance. It is arrange | positioned between the 2nd light sources arrange | positioned at short distance, The diameter of the said supporting member is 30% or less of the distance of a said 1st light source and a said 2nd light source, It is characterized by the above-mentioned. To do.

  According to the illumination device of the present invention, when a plurality of light sources are arranged at an interval shorter than the interval between the plurality of light sources and the optical member, the light from the light source toward the optical member is blocked by the support member and becomes a shadow. This can be suppressed. Therefore, in a backlight having a plurality of light sources, an optical member, and a support member that defines a distance between the plurality of light sources and the optical member, light can be suitably incident on the optical member.

3 is a schematic diagram showing an exploded perspective view of the display device 1. FIG. It is the 1st sectional view showing the section of display 1 in the 1st example. It is the enlarged view which looked at some light source groups of the illuminating device 100 from the front. It is the enlarged view to which one light source group was expanded. It is a schematic diagram which shows the shadow produced | generated by the support member 90 when light is emitted from the some green LED light source 62. FIG. It is the 2nd sectional view showing the section of display 1 in the 1st modification of the 1st example. It is a 3rd sectional view showing the section of display 1 in the 2nd modification of the 1st example. It is a 4th sectional view showing the section of display 1 in the 3rd modification of the 1st example. It is a 5th sectional view showing the section of display 1 in the 2nd example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The technical scope of the present invention is determined by the scope of claims, and is not limited by the examples illustrated below. Further, not all the combinations of features described in the embodiments are essential to the present invention. The contents described in this specification and drawings are illustrative and should not be construed as limiting the present invention. Various modifications (including organic combinations of the embodiments) are possible based on the spirit of the present invention, and they are not excluded from the scope of the present invention. That is, all configurations in which the embodiments and their modifications are combined are also included in the present invention.

(First embodiment)
FIG. 1 is an exploded perspective view of a display device 1 including a lighting device 100 according to the first embodiment. The display device 1 includes a frame 10, a display panel 20, and a lighting device 100 from the front side. Here, the front side is a side on which an image is displayed on the display panel 20. Further, the back surface indicates the side opposite to the front surface.

  The frame 10 is a support member that supports the peripheral area of the display area of the display panel 20 from the front surface. The frame 10 supports the display panel 20 with the panel holder 30 of the illumination device 100 described later interposed therebetween. The frame 10 has an opening so that the display area of the display panel 20 is exposed on the front surface of the display device 1. For example, it is assumed that the frame 10 is a member formed by press-molding an electrogalvanized steel sheet (SECC) having a thickness of 1 mm. The frame 10 may be made of other metal material or may be a resin member molded by resin molding.

  The display panel 20 is a transmissive display panel that transmits light emitted from the lighting device 100 and displays an image in a display area. For example, it is assumed that the display panel 20 is a liquid crystal panel including liquid crystal elements corresponding to pixels. The display panel is connected to the panel drive circuit 21 with a flexible cable, and is connected to a drive circuit (not shown) provided on the back surface of the lighting device 100.

  The details of the lighting device 100 will be described with reference to FIGS. 2, 3, and 4 in addition to FIG. 1. FIG. 2 is a cross-sectional view showing a cross section of the display device 1 as viewed from the lateral direction. In the present embodiment, the horizontal direction is the longitudinal direction of the display device 1. FIG. 2 shows the lower half of the display device 1. In the present embodiment, the vertical direction is the short direction of the display device 1. FIG. 3 is an enlarged front view of the illumination device 100 excluding the reflection sheet 50 as viewed from the front. FIG. 3 is an enlarged view centering on a support member 90 described later. FIG. 4 is an enlarged view of the light source group 61 viewed from the front side.

  The illumination device 100 includes a panel holder 30, an optical sheet 40, a reflection sheet 50, a light source substrate 60, a housing 70, a drive substrate 80, and a support member 90 from the front side.

  The panel holder 30 is a frame-shaped support member that supports the peripheral area of the display area of the display panel 20 from the back side. The panel holder 30 is also a support member that supports the peripheral portion of the optical sheet 40 via an elastic member 31 provided on the front side. The panel holder 30 supports the peripheral portion of the optical sheet 40 with a part of a housing 70 described later.

  The panel holder 30 also supports the optical sheet 40 so that the optical sheet 40 is separated from the light source by a diffusion distance L. The panel holder 30 has an opening at the center in order to irradiate the display panel 20 with light transmitted through the optical sheet 40. For example, it is assumed that the panel holder 30 is a member formed by resin molding of a resin member in which 10% of a glass filler is mixed with PolyCarbonate (PC). The panel holder 30 may be a metal member.

  The optical sheet 40 is disposed on the back side of the panel holder 30 and on the front side of the light source substrate 60, and diffuses or collects light emitted from the light source substrate 60 and the reflection sheet 50 and transmits the light to the front surface. It is a member. The optical sheet 40 is formed by laminating a plurality of light-transmitting sheets, and the sheet has a property of diffusing light or a surface having an uneven shape and a property of condensing light. Can be used. The optical sheet 40 is disposed away from the light source of the light source substrate 60 by a distance equal to or greater than the diffusion distance D1. For example, it is assumed that the diffusion distance D1 is 20 mm.

  The reflection sheet 50 is a reflection member that is provided on the front side of the light source substrate 60 and reflects light. The reflection sheet 50 is bent along the inner wall of the housing 70. Thereby, the reflection sheet 50 substantially covers the front surface of the light source substrate 60 and the inside of the housing 70. The reflection sheet 50 reflects the light emitted from the light source substrate 60 and the light reflected from the optical sheet 40 so as to go to the optical sheet 40. For example, it is assumed that the reflective sheet 50 is a white foamed PET sheet material having a thickness of 0.5 mm and a high reflectance of 95% or more. The reflection sheet 50 may be a metal thin plate with a highly reflective film applied on the surface.

  The reflection sheet 50 includes a plurality of openings 51 so that a light source of a light source substrate 60 described later is exposed. The reflection sheet 50 has an opening 52 at a position where a support member 90 described later is fixed to the base member 71. In addition, when a light sensor for detecting light emitted from the light source substrate 60 is arranged on the light source substrate 60, an opening 53 may be provided so that the light sensor is exposed.

  The light source substrate 60 is provided with a plurality of light source groups 61. As will be described later, a plurality of light source substrates 60 are provided at a certain distance in order to secure a space for fixing the support member 90. For example, it is assumed that the light source substrate 60 is a substrate formed of a glass epoxy material having a thickness of 1.6 mm. The light source substrate 60 is processed so as to have a predetermined curvature at the corner.

  Each light source group 61 has a plurality of light sources 62. The light source groups 61 are arranged in a matrix. As shown in FIG. 3, the light source group 61 includes a plurality of light sources arranged in a lump. In FIG. 3, the four light source groups are referred to as a light source group 61A, a light source group 61B, a light source group 61C, and a light source group 61D, respectively. Here, the light source group 61B is adjacent to the light source group 61A in the horizontal direction, and the light source group 61C is adjacent to the light source group 61A in the vertical direction. Further, the light source group 61D is adjacent to the light source group 61B in the vertical direction and is adjacent to the light source group 61C in the horizontal direction. It can be said that the light source groups 61A to 61D are arranged at the vertices of the rectangles.

  The light source groups 61A to 61D are arranged on different light source substrates 60, respectively. The light source group 61A is disposed on the light source substrate 60A. The light source group 61B is disposed on the light source substrate 60B. The light source group 61C is disposed on the light source substrate 60C. The light source group 61D is disposed on the light source substrate 60D.

  The light source group 61 includes a green LED light source 62 that emits a plurality of green lights, a blue LED light source 63 that emits a plurality of blue lights, and a red LED light source 64 that emits a plurality of red lights. FIG. 4 is an enlarged view of the light source group 61 showing the arrangement of the light sources in the light source group 61 as seen from the front. A green LED light source 62 is arranged at the top of the outermost shell of each light source group 61. Further, the blue LED light source 63 is arranged in the vertical direction with the left and right sides sandwiched between the green LED light sources 62. The red LED light source 64 is arranged side by side in the left-right direction with the top and bottom sandwiched between the green LED light sources 62. By adopting such a light source configuration, it is possible to emit uniform white light from each light source group 61.

  Each light source group 61 has a light source substrate so that the maximum value (distance D2) between adjacent light sources of the adjacent light source groups 61 is shorter than the diffusion distance D1, which is the distance between the optical sheet 40 and the light source substrate 60. 60. In FIG. 3, the longest distance among adjacent light source groups is, for example, the green LED light source 62A disposed at the lower right of the light source group 61A and the green LED light source disposed at the upper left of the light source group 61D. 62D. A distance D2 between the green LED light source 62A and the green LED light source 62D is shorter than the diffusion distance D1. That is, in the light source group 61 arranged at the vertex of each rectangle, the distance D2 between the light sources closest to each other in the diagonal light source group 61 is based on the diffusion distance D1 between the light source substrate 60 and the optical sheet 40. Is also short. For example, it is assumed that the distance D2 is 14 mm.

  As described above, the diffusion distance D1 is a distance at which light emitted from a plurality of light sources can be sufficiently mixed, and a certain distance is required. That is, by making the distance D2 between the light sources shorter than the diffusion distance D1, the light emitted from the light source group 61 is likely to be mixed before reaching the optical sheet 40, and the occurrence of color unevenness can be suppressed. is there.

  The plurality of light sources constituting the light source group 61 may be composed of light sources that emit light of a single color. Further, the arrangement of the plurality of light sources in the light source group 61 is not limited to the example of FIG.

  The housing 70 is a case member that houses the light source substrate 60 and the reflection sheet 50 and is provided with the optical sheet 40 and the panel holder 30 on the front surface side. The housing 70 includes a base member 71 to which the light source substrate 60 is fixed, and a wall member 72 that forms a side surface of the housing 70. Since the light source substrate 60 is fixed to the base member 71, it can be said that each light source provided on the light source substrate 60 is fixed to the base member 71. The base member 71 includes a connection mechanism such as a connector in order to electrically connect the driving substrate 80 and the light source substrate 60 on the back side.

  The housing 70 accommodates the reflection sheet 50 and the light source substrate 60 therein. The housing 70, the reflection sheet 50, and the light source substrate 60 are fixed by a fixing tool such as a screw or a rivet (not shown). The housing 70 and the panel holder 30 are fixed by engaging means such as screws and nail fittings. The base member of the housing 70 is assumed to be a member formed by molding a plate of aluminum alloy (A5052P) having a thickness of 4 mm using a multifunction machine. The wall member 72 of the housing 70 is a member formed by molding SECC having a thickness of 0.8 mm using a multifunction machine.

  Since the base member 71 transmits heat generated in the light source substrate 60 to the outside of the display device 1 and cools the light source substrate 60, an alloy such as iron, aluminum, or copper having a high thermal conductivity is preferable. The thickness of the base member 71 is preferably 2 mm or more from the viewpoint of rigidity. The housing 70 may be a resin member formed by resin molding. The base member 71 includes a joint portion 71 a with the support member 90. For example, it is assumed that the joint portion 71 a is a through hole having a diameter that is the same as or slightly larger than the diameter of the support member 90.

  The drive board 80 is a control board for controlling the light emission of the light source provided on the light source board 60. The drive substrate 80 is provided on the back surface of the housing 70 and is electrically connected to the light source substrate 60 through the base member 71 using a connector or a cable. For example, the drive board 80 uses Board to Board (hereinafter referred to as BtoB) as a connector. Moreover, suppose that flexible wiring is used as a cable.

  The support member 90 is a support member that supports the optical sheet 40 from the back side so that the distance between each light source of the light source substrate 60 and the optical sheet 40 is equal to or greater than the diffusion distance D1. The optical sheet 40 may be “bent” due to heat or vibration. Further, as the size of the display area of the display device 1 increases, the optical sheet 40 also increases, and “deflection” is likely to occur. The support member 90 is fixed to the base member 71 and supports the optical sheet 40 from the back side, thereby holding the distance between the optical sheet 40 and the light source substrate 60 at a diffusion distance D1 or more. In order to reduce unevenness in the distance between the optical sheet 40 and the light source substrate 60, the support member 90 is desirably provided at a plurality of locations.

  As shown in FIGS. 2 and 3, the support member 90 is a cylindrical member. Further, the end portion of the support member 90 facing the optical sheet 40 is chamfered. When the support member 90 comes into contact with the optical sheet 40 by chamfering, the optical sheet 40 is prevented from being contacted. The support member 90 is assumed to be a stainless steel member. The support member 90 may be another metal member or a resin member. You may perform the process which raises a reflectance to the surface of the supporting member 90. FIG. For example, the process for increasing the reflectance is mirror finishing, white coating, plating, or the like.

  Further, the support member 90 is disposed so as to be spaced from the optical sheet 40 in the reference state in which the distance between the optical sheet 40 and the light source substrate 60 is the diffusion distance D1. The distance between the optical sheet 40 and the support member 90 is, for example, about 0.5 mm to 1.0 mm. By doing so, it is possible to prevent the optical sheet 40 and the support member 90 from coming into contact with each other in the reference state and causing contact marks on the optical sheet 40.

  The support member 90 includes a spacer portion 91 exposed inside the housing 70 and a joint portion 92 that is embedded in or penetrates the base member 71 and joined to the base member 71. By joining the joint portion 71a of the base member 71 and the joint portion 92 of the support member 90, it is possible to suppress the collapse of the support member 90 and to prevent the light source substrate 60 and the support member 90 from overlapping. is there. For example, it is assumed that the support member 90 has a joint portion 92 having a length of 4 mm, and the joint portion 92 of the support member 90 is press-fitted and fixed to the joint portion 71 a of the base member 71. The support member 90 and the base member 71 may be fixed by fastening.

  As shown in FIG. 3, the support member 90 is arrange | positioned among the light source groups 61 arrange | positioned diagonally among the light source groups 61A-61D. Specifically, the support member 90 is disposed between the green LED light source 62A disposed at the lower right of the light source group 61A and the green LED light source 62D disposed at the upper left of the light source group 61D. The support member 90 is disposed between the green LED light source 62B disposed at the lower left of the light source group 61B and the green LED light source 62C disposed at the upper right of the light source group 61C.

  Further, the support member 90 is disposed at the intersection of a line segment L1 connecting the centers of the green LED light source 62A and the green LED light source 62D and a line segment L2 connecting the centers of the green LED light source 62B and the green LED light source 62C. By disposing the support member 90 at a substantially equal distance from the plurality of adjacent light source groups 61, it is possible to suppress the occurrence of bias in the optical influence of the support member 90. Thereby, it is possible to suppress the occurrence of color unevenness and brightness unevenness.

  The support member 90 is disposed between the light source substrates 60 on which the light source groups 61 are disposed. The light source substrate 60 and the support member 90 can be attached and detached independently by being fixed to the base member 71 independently. The support member 90 may be bonded to the base member 71 through the light source substrate 60.

  The diameter of the support member 90 is 30% or less of the length of the shorter one of the line segment L1 and the line segment L2. For example, it is assumed that the support member 90 has a diameter of 1.6 mm. In the first embodiment, it is assumed that the line segment L1 and the line segment L2 have the same length. As described above, since the distance D2 is 14 mm, the length of the line segment L1 and the line segment L2 is 14 mm. Therefore, the diameter of the support member 90 is 11.4% of the line segment L1. The diameter of the support member 90 may be 30% or less of the length of the line segment L1. The support member 90 is emitted from each light source group 61 and blocks a part of the light traveling toward the optical sheet 40. Since each light source group 61 includes a plurality of light sources having the same corresponding color, a triangular shadow is formed on the opposite side of the light source across the support member 90 by superimposing the light emitted from the light sources of the respective colors. create.

  FIG. 5 is a schematic diagram in which shadows generated on the optical sheet 40 by the support member 90 when light is emitted from the plurality of green LED light sources 62 of the light source group 61D are projected onto the front view of the illumination device 100 of FIG. is there. The light emitted from each green LED light source 62 of the light source group 61D is blocked by the support member 90 to generate a shadow. A region S where shadows from the plurality of green LED light sources 62 overlap is a region where light emitted from the plurality of green LED light sources 62 of the light source group 61D is difficult to reach. The region S has a triangular shape due to the overlapping of shadows.

  Similarly to the plurality of green LED light sources 62, the plurality of blue LED light sources 63 and the plurality of red LED light sources 64 of the light source group 61D also create shadows. Also, shadows are generated for the other light source groups 61A to 61C in the same manner as the light source group 61D.

  The shadow area S generated by the support member 90 for each light source group 61 becomes smaller as the diameter of the support member 90 is shorter. That is, the shorter the diameter of the support member 90, the smaller the optical influence of the support member 90.

  Furthermore, if the diameter of the support member 90 is larger than 30% of the length of the shorter one of the line segment L1 and the line segment L2, it overlaps with the light source due to the inclination of the support member 90, and each light source is mounted. There is a possibility that the influence and restrictions on the optical surface and the physical surface become large, such as the support member 90 being adjacent to the range.

  Therefore, the support member 90 suppresses the influence of the shadow generated by the support member 90 by setting it to 30% or less of the length of the line segment connecting the adjacent light sources among the adjacent light source groups, and It becomes possible to ensure sufficient strength at the time of attachment.

  The shorter the diameter of the support member 90 is, the better, in order to suppress the influence of the shadow, but in order to support the optical sheet 40 which is the purpose of the support member 90, the mounting stability and the strength of the support member 90 itself are ensured. There is a need to. The diameter of the support member 90 is preferably 5% or more of the length of the shorter one of the line segment L1 and the line segment L2 in order to ensure the mounting stability and strength.

  According to the illuminating device 100 described in the first embodiment, when the plurality of light sources are arranged at intervals shorter than the interval between the plurality of light sources and the optical sheet 40, the optical sheet 40 is separated from the light sources by the support member 90. It is possible to prevent the light traveling toward the shadow from being blocked and becoming a shadow. Therefore, in the illuminating device 100 having a plurality of light sources, an optical sheet, and a support member that defines a distance between the plurality of light sources and the optical member, light can be suitably incident on the optical sheet 40.

  Note that the method of fixing the support member 90 to the base member 71 is not limited to the above-described method. The joint 71a of the base member 71 and the joint 92 of the support member 90 can be configured as described later.

  FIG. 6 is a cross-sectional view illustrating a display device 1 according to a first modification of the first embodiment. As shown in FIG. 7, the support member 190 has a crimped shape with respect to the base member 171. The support member 190 is caulked on the back surface of the base member 171. The caulking direction is on the drive substrate 80 side. The diameter of the base of the support member 190 is increased by 1 to 2 mm with respect to the cylindrical straight shape, and the support member 190 and the base member 171 are joined. The height of the root portion depends on the thickness of the base member 171, but is preferably about 0.5 to 3 mm.

  FIG. 7 is a cross-sectional view illustrating a display device 1 according to a second modification of the first embodiment. As shown in FIG. 8, the support member 290 has a crimped shape with respect to the base member 271. The support member 290 is caulked on the front surface of the base member 271. That is, the caulking direction is the light source substrate 60 side. The diameter of the base of the support member 290 is increased by 1 to 2 mm with respect to the cylindrical straight shape, and the support member 290 and the base member 271 are joined. The height of the root portion depends on the thickness of the base, but is preferably about 0.5 to 3 mm.

  FIG. 8 is a cross-sectional view illustrating a display device 1 according to a third modification of the first embodiment. As shown in FIG. 5, the support member 390 has a crimped shape with respect to the base member 371. The support member 390 is caulked on the front surface of the base member 371. That is, the caulking direction is the light source substrate 60 side. The base diameter of the support member 390 is a dish-like shape with a caulking portion having a diameter of about 1 to 2 mm larger than the cylindrical straight shape, and the support member 390 and the base member 371 are joined.

  As described above, it is possible to improve the strength of the support member by providing the support member and the base member with a crimped shape.

(Second embodiment)
A second embodiment of the present invention will be described with reference to the drawings. Since the device configuration is the same as that of the display device 1 of the first embodiment, description thereof is omitted.

  FIG. 9 is a sectional view showing a transverse section of the display device 1 of the present invention. The illumination device 100 of the second embodiment is different from the first embodiment in that the support member 490 has a shape that penetrates the light source substrate 60 side and the drive substrate 80 side via the base member 471. . The support member 490 is press-fitted and joined to the base member 471.

  The position of the light source substrate 60 and the drive substrate 80 can be determined by the portion 491 that protrudes from the back surface of the base member 471 in the support member 490. Specifically, the portion 491 is inserted into the positioning hole 81 provided in the drive substrate 80. This makes it possible to increase the number of substrates due to expansion of the display area and increase in luminance, and to prevent misalignment when a BtoB connector is employed.

  The positioning hole 81 is a hole that is slightly larger than the diameter of the portion 491 of the support member 490 provided on the substrate side. Further, when there are two or more support members 490 with respect to one light source substrate 60, positioning can be performed more accurately.

  According to the configuration of the second embodiment, similarly to the first embodiment, the illumination device 100 includes a plurality of light sources, an optical sheet, and a support member that defines the intervals between the plurality of light sources and the optical member. Light can suitably enter the sheet 40. Furthermore, when the BtoB connector is adopted, the light source substrate 60 and the drive substrate 80 can be accurately arranged.

  As described above, according to the present invention, even when the brightness of the liquid crystal display device is increased and light sources such as an increase in the number of light sources or narrow intervals are densely arranged, the support that minimizes the optical influence of the support member is provided. The function of the member can be obtained.

DESCRIPTION OF SYMBOLS 1 Display apparatus 100 Illuminating device 50 Reflection sheet 51,52 Opening 60 Light source board 61 Optical sensor 70 Light source group 71 Green LED light source 72 Blue LED light source 73 Red LED light source 80 Housing

Claims (14)

A base member on which a plurality of light sources are arranged;
An optical sheet that is provided on the front surface side of the base member at a predetermined distance and transmits light emitted from the plurality of light sources;
A support member fixed to the base member and supporting the optical sheet;
With
The support member is disposed between the first light source of the plurality of light sources and the second light source disposed at a distance shorter than the predetermined distance from the first light source, and the support The diameter of the member is 30% or less of the distance between the first light source and the second light source.   2. The lighting device according to claim 1, wherein a diameter of the support member is 5% or more of a distance between the first light source and the second light source. A plurality of light source substrates on which the plurality of light sources are arranged;
The plurality of light source substrates are fixed to the base member,
The first light source substrate on which the first light source is disposed is different from the second light source substrate on which the second light source is disposed,
The lighting device according to claim 1, wherein the support member is provided between the first light source substrate and the second light source substrate. The support member is disposed at a joint of the plurality of light source substrates,
The lighting device according to claim 3, wherein corner portions of the plurality of light source substrates have a predetermined curvature. A third light source disposed at a position proximate to the first light source and the second light source;
A fourth light source disposed at a position corresponding to the third light source across the support member;
Further comprising
The diameter of the support member is 30% or less of the short distance among the distance between the first light source and the second light source and the distance between the third light source and the fourth light source. The lighting device according to any one of claims 1 to 4, wherein   The support member is provided at an intersection of a line segment connecting the first light source and the second light source and a line segment connecting the third light source and the fourth light source. The lighting device according to claim 5. The base member includes a joint for fixing the support member;
The lighting device according to claim 1, wherein the support member is fastened and fixed to the joint portion. The base member includes a joint for fixing the support member;
The lighting device according to claim 1, wherein the support member is press-fitted and fixed to the joint portion. A drive board for driving the plurality of light sources provided on the back side of the base member;
The lighting device according to claim 1, wherein the support member is fixed to the base member and the drive substrate.   The lighting device according to claim 1, wherein the support member is a metal member. The support member has a cylindrical shape,
The lighting device according to any one of claims 1 to 10, wherein an end of the support member on a side facing the optical sheet has a predetermined curvature. The plurality of light sources constitute a light source group for each predetermined number of light sources,
The lighting device according to claim 1, wherein the first light source and the second light source constitute different light source groups.   The illumination according to any one of claims 1 to 12, further comprising a reflecting member disposed on a front surface side of the base member and provided with openings so that the plurality of light sources are exposed. apparatus. The lighting device according to any one of claims 1 to 13,
Display means for transmitting light emitted from the illumination device and displaying an image;
A display device comprising:

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