Luminaire and display device

Abstract

To provide a luminaire and a display device capable of uniformizing the distribution of luminance of the light entering a display panel.SOLUTION: A luminaire includes a plurality of substrates arrayed on the same surface. Each of the plurality of substrates has a front surface and a rear surface, and includes a light source arranged on the front surface. A gap is formed between a first substrate and a second substrate adjacent to each other in the plurality of substrates, and the first substrate and the second substrate are connected with each other so that when the luminaire is viewed from the front, a rear end of the gap is concealed.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to lighting devices and display devices. [Background technology]

[0002] Patent Document 1 discloses an illumination device. In this illumination device, a portion of a backlight chassis is covered with a plurality of LED substrates. LEDs are arranged on one side of the plurality of LED substrates. A reflective sheet is arranged between adjacent LED substrates. The LEDs emit light toward the front side, and the emitted light illuminates a liquid crystal display panel. The reflective sheet reflects the incident light toward the front side, and the reflected light illuminates the liquid crystal display panel (paragraphs 0033, 0044, and Figure 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2011 / 048835 Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device disclosed in Patent Document 1, the optical distance from the reflective sheet disposed between adjacent LED substrates to the liquid crystal display panel is longer than the optical distance from the LEDs to the liquid crystal display panel, which results in an uneven distribution of brightness of the light irradiating the liquid crystal display panel.

[0005] In view of this problem, an aspect of the present disclosure provides an illumination device and a display device that can homogenize the luminance distribution of light incident on a display panel, for example. [Means for solving the problem]

[0006] A lighting device according to a first aspect of the present disclosure comprises a plurality of substrates arranged on the same plane, each of the plurality of substrates having a front surface and a rear surface and a light source disposed on the front surface, a gap being formed between a first substrate and a second substrate adjacent to each other in the plurality of substrates, and the first substrate and the second substrate being connected to each other so that the rear end of the gap is hidden when the lighting device is viewed from the front.

[0007] A display device according to a second aspect of the present disclosure includes the lighting device according to the first aspect of the present disclosure and a display panel that modulates the light emitted by the light source. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an exploded perspective view schematically illustrating a display device according to a first embodiment. [Figure 2] 2 is a front view schematically illustrating a chassis and an illumination device provided in the display device of the first embodiment. FIG. [Figure 3] FIG. 2 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in the display device of the first embodiment. [Figure 4] 4 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate, the second substrate, and the connecting member provided in the display device of the first embodiment, taken along the cutting line IV-IV in FIG. 3. FIG. [Figure 5] 3 is an enlarged cross-sectional view schematically illustrating a state in which a connecting member provided in the display device of the first embodiment is detached from a first substrate and a second substrate. FIG. [Figure 6] FIG. 2 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a first modified example of the first embodiment. [Figure 7] FIG. 10 is an enlarged cross-sectional view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a second modified example of the first embodiment. [Figure 8] FIG. 10 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a third modified example of the first embodiment. [Figure 9] FIG. 10 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a fourth modified example of the first embodiment. [Figure 10] FIG. 10 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a second embodiment. [Figure 11] 11 is an enlarged plan view schematically illustrating a cross section of a first substrate, a second substrate, and a connecting member provided in a display device of a second embodiment, taken along cutting line XI-XI in FIG. 10. FIG. [Figure 12] 12 is an enlarged plan view schematically illustrating a cross section of a first substrate, a second substrate, and a connecting member provided in a display device of a second embodiment, taken along the cutting line XII-XII in FIG. 10. FIG. [Figure 13] FIG. 10 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a first modified example of the second embodiment. [Figure 14] 14 is an enlarged cross-sectional view schematically illustrating a cross section of a first substrate, a second substrate, and a connecting member provided in a display device of a first modified example of the second embodiment, taken along the cutting line XIV-XIV in FIG. 13. FIG. [Figure 15] 14 is an enlarged cross-sectional view schematically illustrating a cross section of a first substrate and a second substrate provided in a display device according to a first modified example of the second embodiment, taken along the cutting line XV-XV in FIG. 13. FIG. [Figure 16] FIG. 10 is a front view schematically illustrating a chassis and an illumination device provided in a display device according to a third embodiment. [Figure 17] FIG. 10 is an enlarged plan view schematically illustrating a first substrate and a second substrate provided in a display device according to a third embodiment. [Figure 18] 18 is an enlarged cross-sectional view schematically illustrating a cross section of a first substrate and a second substrate provided in a display device of a third embodiment, taken along the cutting line XVIII-XVIII in FIG. 17. FIG. [Figure 19]18 is an enlarged cross-sectional view schematically illustrating a cross section of a first substrate and a second substrate provided in a display device of a third embodiment, taken along a cutting line XIX-XIX in FIG. 17. FIG. [Figure 20] FIG. 11 is an enlarged cross-sectional view schematically illustrating a first substrate and a second substrate provided in a display device according to a first modified example of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and redundant description will be omitted.

[0010] 1. First embodiment 1.1 Display device Fig. 1 is an exploded perspective view that schematically illustrates a display device according to a first embodiment. Fig. 1 also illustrates the axes of a three-dimensional Cartesian coordinate system defined in a space in which the display device is disposed. The three-dimensional Cartesian coordinate system is defined so that the right, left, front, rear, upper, and lower sides of the display device are the +X, -X, +Y, -Y, +Z, and -Z directions, respectively. The axes of the three-dimensional Cartesian coordinate system are also illustrated in Fig. 2 and subsequent figures.

[0011] The display device 1 shown in FIG. 1 displays an image according to an input video signal.

[0012] As shown in FIG. 1, the display device 1 includes a chassis 11 , a lighting device 12 , a quantum dot sheet 13 , a prism sheet 14 , a frame 15 and a liquid crystal display panel 16 .

[0013] The chassis 11, lighting device 12, quantum dot sheet 13, prism sheet 14, frame 15, and liquid crystal display panel 16 are stacked in the ±Y direction. The chassis 11, lighting device 12, quantum dot sheet 13, prism sheet 14, frame 15, and liquid crystal display panel 16 are arranged in the order listed from the −Y direction side toward the +Y direction side.

[0014] The chassis 11 supports a lighting device 12 .

[0015] Illumination device 12 emits blue light toward the +Y direction. The right, left, front, rear, upper, and lower sides of illumination device 12 correspond to the +X, −X, +Y, −Y, +Z, and −Z directions, respectively.

[0016] Blue light emitted by the lighting device 12 is incident on the quantum dot sheet 13. The quantum dot sheet 13 converts a portion of the incident blue light into red light and emits the red light in the +Y direction, converts a portion of the incident blue light into green light and emits the green light in the +Y direction, and transmits a portion of the incident blue light and emits the blue light in the +Y direction. As a result, the quantum dot sheet 13 emits white light consisting of red light, green light, and blue light in the +Y direction. The lighting device 12 may emit white light, and the quantum dot sheet 13 may be omitted.

[0017] The white light emitted from the quantum dot sheet 13 is incident on the prism sheet 14. The prism sheet 14 equalizes the luminance distribution of the incident white light and emits the white light in the +Y direction.

[0018] The quantum dot sheet 13 and the prism sheet 14 are examples of optical sheets. The display device 1 may include optical sheets other than the quantum dot sheet 13 and the prism sheet 14.

[0019] The frame 15 supports a liquid crystal display panel 16 .

[0020] White light emitted from the prism sheet 14 is incident on the liquid crystal display panel 16. The liquid crystal display panel 16 modulates the incident white light to generate image light and emits the image light toward the +Y direction. As a result, the liquid crystal display panel 16 displays an image toward the +Y direction. The liquid crystal display panel 16 is an example of a display panel. The liquid crystal display panel 16 may be replaced with a display panel other than the liquid crystal display panel 16.

[0021] 1.2 Lighting equipment FIG. 2 is a front view schematically illustrating a chassis and an illumination device provided in the display device of the first embodiment.

[0022] 2, the chassis 11 has a support surface 11a. The support surface 11a is perpendicular to the ±Y directions, is on the +Y direction side, and faces the +Y direction.

[0023] As shown in FIG. 2, the lighting device 12 includes a plurality of substrates 21 and a plurality of connecting members 22.

[0024] The plurality of substrates 21 are arranged on the support surface 11a of the chassis 11. As a result, the plurality of substrates 21 are arranged on the same surface. The plurality of substrates 21 are arranged in a matrix. The plurality of substrates 21 may also be arranged in a non-matrix pattern. For example, the plurality of substrates 21 may be arranged in a staggered pattern. The plurality of substrates 21 are of the same type and have the same shape. As a result, the lighting device 12 can be assembled by arranging the plurality of substrates 21 on the support surface 11a without having to distinguish between the plurality of substrates 21. This makes it easier to assemble the lighting device 12.

[0025] Gaps 23 are formed between adjacent substrates 21 among the plurality of substrates 21. This makes it possible to prevent adjacent substrates 21 from interfering with each other even when there is variation in the planar shapes of the plurality of substrates 21. This makes it possible to assemble the lighting device 12 even when there is variation in the planar shapes of the plurality of substrates 21.

[0026] Adjacent substrates 21 are mechanically connected to each other by one connection member 22 included in the plurality of connection members 22. Adjacent substrates 21 are electrically connected to each other by the one connection member 22.

[0027] Each of the substrates 21 included in the plurality of substrates 21 has a front surface 21a. The front surface 21a is perpendicular to the ±Y directions, is on the +Y direction side, and faces the +Y direction.

[0028] As shown in FIG. 2, each board 21 includes a drive board 41 , a plurality of light sources 42 and a connector 43 .

[0029] The plurality of light sources 42 are mounted on the front surface of the drive board 41 and are arranged on the front surface 21 a of each board 21 .

[0030] The connector 43 is mounted on the back surface of the drive board 41 .

[0031] A flexible printed circuit board (FPC) for transmitting a control signal is connected to a connector 43 provided on one of the plurality of boards 21, and the transmitted control signal is input. The input control signal is transmitted to the other boards 21 included in the plurality of boards 21 via a plurality of connection members 22. A drive board 41 provided on one of the boards 21 generates drive power for driving the plurality of light sources 42 provided on the one board 21 from the supplied power in accordance with the control signal input to the connector 43 provided on the one board 21. A drive board 41 provided on the other board 21 generates drive power for driving the plurality of light sources 42 provided on the other board 21 from the supplied power in accordance with the control signal transmitted via the plurality of connection members 22. In this way, by inputting a control signal to the connector 43 provided on one board 21, it is possible to input a control signal to all of the plurality of boards 21. Power may be supplied to the connector 43 provided on one board 21, and the supplied power may be transmitted to the other boards 21 via a plurality of connection members 22.

[0032] 1.3 Connecting adjacent boards Fig. 3 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in the display device of the first embodiment. Fig. 4 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate, the second substrate, and the connecting member provided in the display device of the first embodiment, taken along the cutting line IV-IV in Fig. 3.

[0033] As shown in Figures 3 and 4, each substrate 21 has a front surface 21a and a rear surface 21b. The front surface 21a is perpendicular to the ±Y directions, is on the +Y direction side, and faces the +Y direction. The rear surface 21b is perpendicular to the ±Y directions, is on the -Y direction side, and faces the -Y direction. Therefore, a first substrate 31, which is one of the adjacent substrates 21, has a first front surface 31a and a first rear surface 31b. A second substrate 32, which is the other of the adjacent substrates 21, has a second front surface 32a and a second rear surface 32b. The first front surface 31a and the second front surface 32a form the same plane. The first rear surface 31b and the second rear surface 32b form the same plane.

[0034] The gap 23 formed between the first substrate 31 and the second substrate 32 has a front end 23a and a rear end 23b. The front end 23a is located between the first front surface 31a of the first substrate 31 and the second front surface 32a of the second substrate 32. The rear end 23b is located between the first rear surface 31b of the first substrate 31 and the second rear surface 32b of the second substrate 32.

[0035] As shown in FIGS. 3 and 4, the connection member 22 includes a plate-shaped member 51 and a plurality of coupling members 52.

[0036] The plate-shaped member 51 has a plate-like shape. The plate-shaped member 51 is disposed across the first front surface 31a of the first substrate 31 and the second front surface 32a of the second substrate 32. As a result, the plate-shaped member 51 is located on the +Y direction side of the first front surface 31a, the second front surface 32a, and the front end 23a of the gap 23. As a result, the plate-shaped member 51 hides the gap 23 when the lighting device 12 is viewed from the front. The plate-shaped member 51 hides the gap 23 from the front end 23a to the rear end 23b of the gap 23. By hiding the gap 23 with the plate-shaped member 51, the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the plate-shaped member 51 to the liquid crystal display panel 16 can be made smaller than the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the rear end 23b to the liquid crystal display panel 16. This makes it possible to uniformize the luminance distribution of the white light incident on the liquid crystal display panel 16, and to uniformize the luminance distribution of the image light emitted from the liquid crystal display panel 16. This makes it possible to prevent unevenness from occurring in the image displayed by the liquid crystal display panel 16.

[0037] The gap 23 formed between the first substrate 31 and the second substrate 32 is hidden by one plate-like member 51. Therefore, the area of ​​the gap 23 hidden by the plate-like member 51 is one continuous area. In this case, it is desirable that an area occupying two-thirds or more of the gap 23 be hidden by the plate-like member 51 when the lighting device 12 is viewed from the front.

[0038] The plate-like member 51 is disposed parallel to the first front surface 31a of the first substrate 31 and the second front surface 32a of the second substrate 32. This makes the optical distance from the plate-like member 51 to the liquid crystal display panel 16 uniform. This makes it possible to further uniform the luminance distribution of white light incident on the liquid crystal display panel 16.

[0039] The plate-like member 51 contacts the first front surface 31a of the first substrate 31 and the second front surface 32a of the second substrate 32. This allows the plate-like member 51 to be closest to the first front surface 31a and the second front surface 32a within a range where the plate-like member 51 can hide the gap 23. This makes it possible to further uniform the luminance distribution of white light incident on the liquid crystal display panel 16.

[0040] The thickness of the plate-shaped member 51 is thinner than the thickness of the first substrate 31 and the second substrate 32. Therefore, the thickness of the plate-shaped member 51 is thinner than the size of the gap 23 in the ±Y directions.

[0041] The plate-shaped member 51 has a rectangular cross-section parallel to the XY plane and the YZ plane. Therefore, the plate-shaped member 51 has a main surface 51a and an end surface 51b. The main surface 51a faces the +Y direction. The end surface 51b faces a direction perpendicular to the +Y direction.

[0042] When the lighting device 12 is viewed from the front, the plate-like member 51 has a rectangular planar shape and has an outline made up of four straight sides.

[0043] The plurality of coupling members 52 are coupled to the plate-shaped member 51. The plurality of coupling members 52 are coupled to the first substrate 31 and the second substrate 32. As a result, the plate-shaped member 51 is coupled to the first substrate 31 and the second substrate 32 via the plurality of coupling members 52. The first substrate 31 and the second substrate 32 are coupled to each other via the plurality of coupling members 52.

[0044] When the lighting device 12 is viewed from the front, the multiple connecting members 52 are hidden by the plate-like member 51. This makes it possible to prevent the multiple connecting members 52 from reducing the uniformity of the luminance distribution of white light incident on the liquid crystal display panel 16.

[0045] 1.4 Light reflectance of the front surface of the first substrate, the front surface of the second substrate, and the main surface of the plate-like member 3 and 4, the first front surface 31a of the first substrate 31 has a first region 31c that is not hidden by the plate-like member 51 when the lighting device 12 is viewed from the front. The second front surface 32a of the second substrate 32 has a second region 32c that is not hidden by the plate-like member 51 when the lighting device 12 is viewed from the front.

[0046] The first region 31c of the first substrate 31, the second region 32c of the second substrate 32, and the main surface 51a of the plate-like member 51 are made of the same material. The light reflectance of the main surface 51a is set to be the same as the light reflectance of the first region 31c and the second region 32c. This makes it possible to further uniformize the luminance distribution of white light incident on the liquid crystal display panel 16. The first region 31c, the second region 32c, and the main surface 51a are preferably made of a material that exhibits a white color. The white material is, for example, white paint.

[0047] The main surface 51a of the plate-like member 51 is located closer to the +Y direction than the first region 31c of the first substrate 31 and the second region 32c of the second substrate 32. Therefore, the optical distance from the main surface 51a to the liquid crystal display panel 16 is shorter than the optical distances from the first region 31c and the second region 32c to the liquid crystal display panel 16. In order to prevent the luminance distribution of white light incident on the liquid crystal display panel 16 from becoming non-uniform due to the former distance being shorter than the latter distance, the light reflectance of the main surface 51a may be set lower than the light reflectance of the first region 31c and the second region 32c.

[0048] 1.5 Bonding of the bonding member to the first and second substrates 3 and 4, a plurality of first connection holes 31d are formed in the first front surface 31a of the first substrate 31. A plurality of second connection holes 32d are formed in the second front surface 32a of the second substrate 32. The first connection holes 31d extend in the -Y direction from the first front surface 31a. The second connection holes 32d extend in the -Y direction from the second front surface 32a.

[0049] The first substrate 31 and the second substrate 32 have a first end face 31e and a second end face 32e, respectively, that face each other across a gap 23. The first connection holes 31d of the first substrate 31 are formed along the first end face 31e and are arranged at equal intervals in a direction parallel to the first end face 31e. The second substrate 32 has a plurality of second connection holes 32d that are formed along the second end face 32e and are arranged at equal intervals in a direction parallel to the second end face 32e.

[0050] As shown in FIGS. 3 and 4, each of the plurality of connecting members 52 includes an intermediate portion 61, a first insert portion 71, and a second insert portion 72.

[0051] The intermediate portion 61 is embedded in the plate-like member 51. The intermediate portion 61 has a rod-like shape, and therefore has a first end and a second end.

[0052] The first insertion portion 71 and the second insertion portion 72 have a rod-like shape. The front end of the first insertion portion 71 is connected to the first end of the intermediate portion 61. The front end of the second insertion portion 72 is connected to the second end of the intermediate portion 61. The first insertion portion 71 extends in the -Y direction from the first end of the intermediate portion 61. The second insertion portion 72 extends in the -Y direction from the second end of the intermediate portion 61. The first insertion portion 71 is inserted into the first connection hole 31d. The second insertion portion 72 is inserted into the second connection hole 32d. This makes it possible to restrict the first substrate 31 and the second substrate 32 from moving relative to each other in a direction perpendicular to the ±Y directions.

[0053] FIG. 5 is an enlarged cross-sectional view schematically illustrating a state in which the connection member provided in the display device of the first embodiment has been removed from the first substrate and the second substrate.

[0054] As shown in FIG. 5 , the first insertion portion 71 includes a first claw 81. The second insertion portion 72 includes a second claw 82. The first claw 81 is located at the rear end of the first insertion portion 71 and engages with the first connection hole 31d of the first board 31. The second claw 82 is located at the rear end of the second insertion portion 72 and engages with the second connection hole 32d of the second board 32. This prevents the first insertion portion 71 from coming off the first connection hole 31d after it has been inserted into the first connection hole 31d. Furthermore, it also prevents the second insertion portion 72 from coming off the second connection hole 32d after it has been inserted into the second connection hole 32d.

[0055] 1.6 Electrical connection by connecting members 4, the first substrate 31 includes a first wiring 91. The second substrate 32 includes a second wiring 92. The first wiring 91 is embedded in the first substrate 31 and exposed at the inner circumferential surface of the first connection hole 31d of the first substrate 31. The second wiring 92 is embedded in the second substrate 32 and exposed at the inner circumferential surface of the second connection hole 32d of the second substrate 32.

[0056] The coupling member 52 is made of a conductor. The outer peripheral surface of the first insertion portion 71 contacts the inner peripheral surface of the first connection hole 31d. The outer peripheral surface of the second insertion portion 72 contacts the inner peripheral surface of the second connection hole 32d. This brings the coupling member 52 into contact with the first wiring 91 and the second wiring 92. This electrically connects the first wiring 91 and the second wiring 92 to each other via the conductor. This electrically connects the first wiring 91 and the second wiring 92 to each other via the connection member 22.

[0057] 1.7 Variations FIG. 6 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a first modified example of the first embodiment.

[0058] In a first modification of the first embodiment, as shown in FIG. 6 , the first connection holes 31d of the first substrate 31 are divided into a first group 101, a second group 102, a third group 103, and a fourth group 104. Adjacent first connection holes 31d in each of the first group 101, the second group 102, the third group 103, and the fourth group 104 are separated from each other by a first width W1 in a direction parallel to the first end face 31e of the first substrate 31. Adjacent groups in the first group 101, the second group 102, the third group 103, and the fourth group 104 are separated from each other by a second width W2, which is greater than the first width W1, in a direction parallel to the first end face 31e. The first connection holes 31d in the same group are used to transmit control signals having the same function. The first connection holes 31d belonging to different groups are used to transmit control signals having different roles. The same is true for the plurality of second connection holes 32d of the second substrate 32.

[0059] FIG. 7 is an enlarged cross-sectional view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a second modified example of the first embodiment.

[0060] In the second modification of the first embodiment, as shown in Fig. 7, the plate-shaped member 51 has a trapezoidal cross-sectional shape in a cross section parallel to each of the XY plane and the YZ plane. Therefore, the end face 51b of the plate-shaped member 51 faces a direction inclined toward the +Y direction from a direction perpendicular to the +Y direction. This makes it possible to prevent a sudden change in the optical distance from the illumination device 12 to the liquid crystal display panel 16 between the main surface 51a of the plate-shaped member 51 and the first region 31c of the first substrate 31 and the second region 32c of the second substrate 32. This makes non-uniformity in the luminance distribution of the image light emitted from the liquid crystal display panel 16 less noticeable.

[0061] FIG. 8 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a third modified example of the first embodiment.

[0062] 8, in the third modification of the first embodiment, the plate-like member 51 has a wavy outline when the illumination device 12 is viewed from the front. This makes non-uniformity in the luminance distribution of the image light emitted from the liquid crystal display panel 16 less noticeable.

[0063] FIG. 9 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device according to a fourth modified example of the first embodiment.

[0064] 9 , in the fourth modified example of the first embodiment, the gap 23 formed between the first substrate 31 and the second substrate 32 is hidden by a plurality of plate-like members 51. Therefore, the region of the gap 23 formed between the first substrate 31 and the second substrate 32 that is hidden by the plate-like members 51 is a plurality of regions that are spaced apart from one another. In this case, the area occupied by the region hidden by the plate-like members 51 may be smaller than when the region hidden by the plate-like members 51 is a single continuous region, and it is sufficient that the region that occupies at least one-quarter of the gap 23 when the lighting device 12 is viewed from the front is hidden by the plate-like members 51.

[0065] 2. Second embodiment The following describes the differences between the second embodiment and the first embodiment. For points that are not described, the second embodiment also employs the same configuration as that employed in the first embodiment.

[0066] Fig. 10 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device of a second embodiment. Fig. 11 is an enlarged plan view schematically illustrating a cross section of the first substrate, the second substrate, and the connecting member provided in a display device of the second embodiment, taken along the cutting line XI-XI in Fig. 10. Fig. 12 is an enlarged plan view schematically illustrating a cross section of the first substrate, the second substrate, and the connecting member provided in a display device of the second embodiment, taken along the cutting line XII-XII in Fig. 10.

[0067] In the second embodiment, as shown in FIGS. 10 to 12, a first recess 31f is formed in the first front surface 31a of the first substrate 31. A second recess 32f is formed in the second front surface 32a of the second substrate 32. The first connection hole 31d of the first substrate 31 is formed in the bottom surface of the first recess 31f. The second connection hole 32d of the second substrate 32 is formed in the bottom surface of the second recess 32f. The plate-shaped member 51 is disposed across the first recess 31f and the second recess 32f. This allows the main surface 51a of the plate-shaped member 51 to be closer to the first region 31c of the first substrate 31 and the second region 32c of the second substrate 32 in the ±Y directions. This further reduces the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the plate-shaped member 51 to the liquid crystal display panel 16. This makes it possible to further uniform the luminance distribution of the white light incident on the liquid crystal display panel 16, and further uniform the luminance distribution of the image light emitted from the liquid crystal display panel 16. This makes it possible to further prevent unevenness from occurring in the image displayed by the liquid crystal display panel 16.

[0068] The first front surface 31a of the first substrate 31 has a first front surface region 31g where the first recess 31f is not formed. The second front surface 32a of the second substrate 32 has a second front surface region 32g where the second recess 32f is not formed.

[0069] The plate-shaped member 51 preferably has a thickness equal to the depth of the first recess 31f of the first substrate 31 and the second recess 32f of the second substrate 32. This allows the first front region 31g of the first substrate 31, the second front region 32g of the second substrate 32, and the main surface 51a of the plate-shaped member 51 to form the same plane. This eliminates the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the plate-shaped member 51 to the liquid crystal display panel 16. This allows the luminance distribution of white light incident on the liquid crystal display panel 16 to be more uniform. When the first front region 31g, the second front region 32g, and the main surface 51a form the same plane, the first front region 31g, the second front region 32g, and the main surface 51a have the same light reflectivity.

[0070] The first recess 31f of the first substrate 31 is formed over a range wider than the range in which the plurality of first connection holes 31d are arranged in the direction in which the plurality of first connection holes 31d are arranged in the first substrate 31. The second recess 32f of the second substrate 32 is formed over a range wider than the range in which the plurality of second connection holes 32d are arranged in the direction in which the plurality of second connection holes 32d are arranged in the second substrate 32. Therefore, the cross-sectional shapes of the first substrate 31 and the second substrate 32 within the range in which the plurality of first connection holes 31d and the plurality of second connection holes 32d are arranged, as shown in Fig. 11, are the same as the cross-sectional shapes of the first substrate 31 and the second substrate 32 outside the range in which the plurality of first connection holes 31d and the plurality of second connection holes 32d are arranged, as shown in Fig. 12.

[0071] Fig. 13 is an enlarged plan view schematically illustrating a first substrate, a second substrate, and a connecting member provided in a display device of a first modified example of the second embodiment. Fig. 14 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate, the second substrate, and the connecting member provided in a display device of a first modified example of the second embodiment, taken along the line XIV-XIV in Fig. 13. Fig. 15 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate and the second substrate provided in a display device of a first modified example of the second embodiment, taken along the line XV-XV in Fig. 13.

[0072] In the first modified example of the second embodiment, the first recess 31f of the first substrate 31 is formed only in the range where the plurality of first connection holes 31d of the first substrate 31 are arranged. The second recess 32f of the second substrate 32 is formed only in the range where the plurality of second connection holes 32d of the second substrate 32 are arranged. Therefore, the cross-sectional shapes of the first substrate 31 and the second substrate 32 within the range where the plurality of first connection holes 31d and the plurality of second connection holes 32d are arranged, as shown in Fig. 14, differ from the cross-sectional shapes of the first substrate 31 and the second substrate 32 outside the range where the plurality of first connection holes 31d and the plurality of second connection holes 32d are arranged, as shown in Fig. 15.

[0073] 3 Third embodiment The following describes the differences between the third embodiment and the first embodiment. For points that are not described, the third embodiment also employs the same configuration as that employed in the first embodiment.

[0074] FIG. 16 is a front view schematically illustrating a chassis and an illumination device provided in the display device of the third embodiment.

[0075] As shown in FIG. 16, in the third embodiment, adjacent substrates 21 among a plurality of substrates 21 are directly mechanically and electrically connected to each other without using a connecting member.

[0076] Fig. 17 is an enlarged plan view schematically illustrating a first substrate and a second substrate provided in a display device of the third embodiment. Fig. 18 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate and the second substrate provided in the display device of the third embodiment, taken along the line XVIII-XVIII in Fig. 17. Fig. 19 is an enlarged cross-sectional view schematically illustrating a cross section of the first substrate and the second substrate provided in the display device of the third embodiment, taken along the line XIX-XIX in Fig. 17.

[0077] 17 to 19 , the first substrate 31 includes a first connection portion 111 and a first main body portion 112. The second substrate 32 includes a second connection portion 121 and a second main body portion 122. The first connection portion 111 is connected to the outer periphery of the first main body portion 112. The second connection portion 121 is connected to the outer periphery of the second main body portion 122. The thickness of the first connection portion 111 is thinner than the thickness of the first main body portion 112. The thickness of the second connection portion 121 is thinner than the thickness of the second main body portion 122. The sum of the thicknesses of the first connection portion 111 and the second main body portion 122 is the same as the thicknesses of the first main body portion 112 and the second main body portion 122. The front surface 111a of the first connection portion 111 is located on the -Y direction side of the front surface 112a of the first main body portion 112. The rear surface 111b of the first connecting portion 111 and the rear surface 112b of the first main body portion 112 form the same plane. The rear surface 121b of the second connecting portion 121 is located on the +Y direction side of the rear surface 122b of the second main body portion 122. The front surface 121a of the second connecting portion 121 and the front surface 122a of the second main body portion 122 form the same plane. The first connecting portion 111 and the second connecting portion 121 are stacked in the ±Y direction and connected to each other. The first connecting portion 111 is disposed on the -Y direction side. The second connecting portion 121 is disposed on the +Y direction side. The front surface 111a of the first connecting portion 111 and the rear surface 121b of the second connecting portion 121 contact each other.

[0078] When the lighting device 12 is viewed from the front, the second connecting portion 121 hides the gap 23 from its middle portion to its rear end 23b. Since the second connecting portion 121 hides the gap 23 from its middle portion to its rear end 23b, the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the second connecting portion 121 to the liquid crystal display panel 16 can be made smaller than the difference between the optical distance from the multiple light sources 42 to the liquid crystal display panel 16 and the optical distance from the rear end 23b to the liquid crystal display panel 16. This makes it possible to uniformize the luminance distribution of the white light incident on the liquid crystal display panel 16 and the luminance distribution of the image light emitted from the liquid crystal display panel 16. This makes it possible to suppress unevenness in the image displayed on the liquid crystal display panel 16.

[0079] The first connecting portion 111 may be arranged on the +Y direction side, the second connecting portion 121 may be arranged on the -Y direction side, and the first connecting portion 111 may cover the gap 23 from the middle portion to the rear end 23b.

[0080] The first connection portion 111 has a plurality of protrusions 131. The second connection portion 121 has a plurality of recesses 132 formed therein. The plurality of protrusions 131 protrude toward the +Y direction side. The plurality of recesses 132 are recessed toward the +Y direction side. The plurality of protrusions 131 each have a shape that matches the shape of the plurality of recesses 132. The plurality of protrusions 131 are fitted into the plurality of recesses 132, respectively. This makes it possible to restrict the first substrate 31 and the second substrate 32 from moving relative to each other in a direction perpendicular to the ±Y direction.

[0081] The first substrate 31 includes a plurality of first wirings 91. The second substrate 32 includes a plurality of second wirings 92. The plurality of first wirings 91 are embedded in the first substrate 31 and exposed at a front surface 111a of the first connection portion 111, which occupies a portion of the surface of the first connection portion 111. The plurality of second wirings 92 are embedded in the second substrate 32 and exposed at a rear surface 121b of the second connection portion 121, which occupies a portion of the surface of the second connection portion 121. The plurality of second wirings 92 are in contact with the plurality of first wirings 91, respectively. As a result, the plurality of second wirings 92 are electrically connected to the plurality of first wirings 91, respectively.

[0082] The protrusion 131 is a part of the first wiring 91. The protrusion 131 may be other than a part of the first wiring 91. The recess 131 is formed so that the second wiring 92 is exposed at the bottom of the recess 131. The recess 131 may also be formed so that the second wiring 92 is not exposed at the bottom of the recess 131.

[0083] 19, the plurality of protrusions 131 include protrusions 152 each having a claw 151. The plurality of recesses 132 include recesses 153 into which the protrusions 152 each having the claw 151 fit. The claw 151 protrudes farther in the +Y direction than the portion of the protrusion 152 other than the claw 151. This makes it possible to more strongly restrict the first substrate 31 and the second substrate 32 from moving relative to each other in a direction perpendicular to the ±Y directions.

[0084] 16, the plurality of substrates 21 include four types of substrates having different structures. The four types of substrates include a substrate 161 having a first connection portion 111 on two sides, a substrate 162 having a second connection portion 121 on two sides, a substrate 163 having a first connection portion 111 on one side and a second connection portion 121 on two sides, and a substrate 164 having a first connection portion 111 on two sides and a second connection portion 121 on one side.

[0085] FIG. 20 is an enlarged cross-sectional view schematically illustrating a first substrate and a second substrate provided in a display device according to a first modified example of the third embodiment.

[0086] In the first modified example of the third embodiment, as shown in FIG. 20, the claw 151 is not provided on the first wiring 91, but is separate from the first wiring 91.

[0087] The present disclosure is not limited to the above-described embodiments, and may be replaced with a configuration that is substantially the same as the configuration shown in the above-described embodiments, a configuration that has the same effect, or a configuration that can achieve the same purpose. [Explanation of symbols]

[0088] 1 display device, 11 chassis, 11a support surface, 12 lighting device, 13 quantum dot sheet, 14 prism sheet, 15 frame, 16 liquid crystal display panel, 21 substrate, 21a front surface, 21b rear surface, 22 connection member, 23 gap, 23a front end, 23b rear end, 31 first substrate, 31a first front surface, 31b first rear surface, 31c first region, 31d first connection hole, 31e first end face, 31f first recess, 31g first front region, 32 second substrate, 32a second front surface, 32b second rear surface, 32c second region, 32d second connection hole, 32e second end face, 32f second recess, 32g second front region, 41 drive substrate, 42 light source, 43 connector, 51 plate-shaped member, 51a Main surface, 51b End surface, 52 Joining member, 61 Middle portion, 71 First insertion portion, 72 Second insertion portion, 81 First claw, 82 Second claw, 91 First wiring, 92 Second wiring, 101 First group, 102 Second group, 103 Third group, 104 Fourth group, 111 First connecting portion, 111a Front surface, 111b Rear surface, 112 First main body portion, 112a Front surface, 112b Rear surface, 121 Second connecting portion, 121a Front surface, 121b Rear surface, 122 Second main body portion, 122a Front surface, 122b Rear surface, 131 Convex portion, 132 Concave portion, 151 Claw, 152 Convex portion, 153 Concave portion, 161, 162, 163, 164 Circuit board.

Claims

1. 1. A lighting device, comprising: Multiple substrates arranged on the same plane Equipped with each of the plurality of substrates having a front surface and a rear surface and including a light source disposed on the front surface; a gap is formed between adjacent first and second substrates in the plurality of substrates; The first substrate and the second substrate are connected to each other so that a rear end of the gap is hidden when the lighting device is viewed from the front. Lighting equipment.

2. a connecting member that connects the first substrate and the second substrate to each other and hides the rear end when the lighting device is viewed from the front; The lighting device of claim 1 .

3. The connection member electrically connects the first substrate and the second substrate to each other.

3. The lighting device according to claim 2.

4. The connection member includes a plate-like member that is disposed across a first front surface of the first substrate and a second front surface of the second substrate and that hides the rear end when the lighting device is viewed from the front, and a coupling member that is coupled to the plate-like member and to the first substrate and the second substrate.

3. The lighting device according to claim 2.

5. the first front surface has a first region that is not hidden by the plate-like member when the lighting device is viewed from the front, the second front surface has a second region that is not hidden by the plate-like member when the lighting device is viewed from the front, the plate-like member has a main surface that is located forward of the first region and the second region and faces forward; The main surface has a light reflectance lower than the light reflectances of the first region and the second region.

5. The lighting device according to claim 4.

6. a first recess formed in the first front surface; a second recess formed in the second front surface; The plate-like member is accommodated across the first recess and the second recess.

5. The lighting device according to claim 4.

7. The plate-like member has a thickness equal to the depth of the first recess and the second recess.

7. The lighting device according to claim 6.

8. the first front surface has a first front surface region in which the first recess is not formed; the second front surface has a second front surface region in which the second recess is not formed, the plate-like member has a main surface facing forward, The first front surface region, the second front surface region, and the main surface form the same plane.

7. The lighting device according to claim 6.

9. The first front surface region, the second front surface region, and the main surface have the same light reflectivity.

9. The lighting device according to claim 8.

10. a first connection hole is formed in the first front surface; a second connection hole is formed in the second front surface; The coupling member includes a first insertion portion that is inserted into the first connection hole and a second insertion portion that is inserted into the second connection hole.

5. The lighting device according to claim 4.

11. the first insertion portion has a first claw that engages with the first connection hole, The second insertion portion has a second claw that engages with the second connection hole.

11. The lighting device according to claim 10.

12. the first substrate includes a first wiring; the second substrate includes a second wiring; The coupling member includes a conductor that contacts the first wiring and the second wiring.

5. The lighting device according to claim 4.

13. the first front surface has a first region that is not hidden by the plate-like member when the lighting device is viewed from the front, the second front surface has a second region that is not hidden by the plate-like member when the lighting device is viewed from the front, the plate-like member has a main surface facing forward, The first region, the second region, and the main surface are made of the same material.

5. The lighting device according to claim 4.

14. The plate-like member has a main surface facing a forward direction and an end surface facing a direction inclined toward the forward direction from a direction perpendicular to the forward direction.

5. The lighting device according to claim 4.

15. The plate-like member has a shape with a wavy outline when the lighting device is viewed from the front.

5. The lighting device according to claim 4.

16. the first substrate includes a first connection portion; the second substrate includes a second connection portion connected to the first connection portion; The first connection portion or the second connection portion hides the rear end when the lighting device is viewed from the front. The lighting device according to claim 1 .

17. The first connecting portion and the second connecting portion are overlapped in the front-rear direction.

17. The lighting device of claim 16.

18. the first connection portion includes a protrusion, The second connecting portion has a recess into which the protrusion is fitted.

18. The lighting device of claim 17.

19. the first connecting portion has a first surface; the second connecting portion has a second surface in contact with the first surface; the first substrate includes a first wiring exposed on the first surface; The second substrate has a second wiring exposed on the second surface and in contact with the first wiring.

17. The lighting device of claim 16.

20. The first substrate and the second substrate are connected to each other so that one continuous region occupying two-thirds or more of the rear end is hidden when the lighting device is viewed from the front.

20. A lighting device according to any one of claims 1 to 19.

21. The first substrate and the second substrate are connected to each other so that a plurality of regions spaced apart from each other and occupying ¼ or more of the gap are hidden when the lighting device is viewed from the front.

20. A lighting device according to any one of claims 1 to 19.

22. A lighting device according to any one of claims 1 to 19; a display panel that modulates the light emitted by the light source; A display device comprising:

Images