Display module and display device

Abstract

The invention discloses a display module and a display device. The display module comprises a plurality of light guide sheets and a light source; each light guide sheet is provided with a light inlet surface and a light outlet surface; an accommodating space is formed between the light incident surfaces of the adjacent light guide sheets; the light source is arranged in the accommodating space and is suitable for emitting light beams to the incident surfaces; light beams enter the light guide pieces through the light incident faces and are emitted out through the light emergent faces. According to the display module and the display device, the thickness of the display module can be effectively reduced, the appearance is light, thin and attractive, and the manufacturing cost is also saved; meanwhile, under the configuration layout, modular assembly is facilitated, when a plurality of light sources are located in the containing spaces between the light guide pieces respectively, all the light sources are suitable for being controlled independently, the regional dimming effect can be achieved, image contrast is improved, and backlight power consumption is reduced.

Description

Technical Field

[0001] The present invention relates to a display module and a display device, and particularly to a display module capable of regional dimming and a display device having the same. Background Art

[0002] Generally, a mini light-emitting diode display with a local dimming function can separately control the light-emitting diodes in each area of its backlight module, so that the light-emitting brightness of the light-emitting diodes in different areas is different, thereby improving the contrast effect of the picture and reducing the backlight power consumption. However, most such mini light-emitting diode displays are thick and heavy, have an unattractive appearance, and are costly to manufacture. There are also light-emitting diode displays with a side-in type backlight module on the market. The light-emitting diodes are arranged on the side of the panel. Although it helps to reduce the thickness of the display, it does not have the function of regional dimming, has a poor picture contrast, and high backlight power consumption. At the same time, because the light-emitting diodes are located on the side of the panel, the border thickness on the light-incident side is large and unattractive.

[0003] Therefore, it is necessary to provide a display module and a display device to solve the above problems. Summary of the Invention

[0004] The present invention provides a display module with a thin and light appearance and having the function of regional dimming.

[0005] The display module of the present invention includes a plurality of light guide plates and a light source. Each light guide plate is provided with a light-incident surface and a light-emitting surface. An accommodation space is formed around between the light-incident surfaces of adjacent light guide plates. A light source is disposed in the accommodation space and is adapted to emit light beams toward each light-incident surface. The light beams enter each light guide plate through each light-incident surface and are emitted through each light-emitting surface.

[0006] In an embodiment of the present invention, the above display module further includes a plurality of reflection boxes. Each reflection box has at least one reflection surface. These light guide plates are respectively accommodated in these reflection boxes.

[0007] In an embodiment of the present invention, each of the above light guide plates has a back surface opposite to the light-emitting surface and a side surface adjacent to the light-incident surface. Each reflection box includes a bottom wall and a side wall connected to the bottom wall. The back surface of each light guide plate faces the bottom wall of the corresponding reflection box. The side surface of each light guide plate faces the side wall of the corresponding reflection box.

[0008] In an embodiment of the present invention, the above reflection box includes a plurality of side walls. A notch is formed around between two adjacent side walls and the bottom wall. The notch is aligned with the light-incident surface and communicates with the accommodation space.

[0009] In an embodiment of the present invention, a plurality of dots are provided on the back surface of each of the above light guide plates, and the sizes of these dots gradually increase from the side towards the central region of the back surface.

[0010] In an embodiment of the present invention, the above display module further includes a substrate. The light source is disposed on the substrate. Each reflection box is provided with a hook. The hook is engaged with the substrate.

[0011] In an embodiment of the present invention, the above display module further includes a back plate. Each reflection box is provided with another hook. The above another hook is engaged with the back plate. The substrate is attached to the back plate.

[0012] In an embodiment of the present invention, the above light source includes a light emitting element. The light emitting element faces the light incident surface.

[0013] In an embodiment of the present invention, the thickness of each of the above light guide plates is greater than or equal to the height of the light emitting element.

[0014] In an embodiment of the present invention, the above light emitting element has a light emitting surface, and the area of the light incident surface is greater than the area of the light emitting surface.

[0015] In an embodiment of the present invention, the above light emitting element has a light emitting surface, and the light incident surface is parallel to the light emitting surface.

[0016] In an embodiment of the present invention, the above display module further includes a support member. The support member is disposed in the accommodation space. The height of the support member is greater than the height of the light emitting element.

[0017] In an embodiment of the present invention, each of the above light guide plates has a back surface relative to the light exit surface. The back surface has a plurality of dots.

[0018] In an embodiment of the present invention, the above display module includes a plurality of accommodation spaces and a plurality of light sources. These light sources are respectively disposed in these accommodation spaces, and these light guide plates and these light sources are arranged in an array.

[0019] The display device of the present invention includes a display module, an optical film stack, and a panel. The display module includes a plurality of light guide plates and a light source. Each light guide plate has a light incident surface and a light exit surface. An accommodation space is formed between the light incident surfaces of adjacent ones of these light guide plates. The light source is disposed in the accommodation space and is adapted to emit light beams towards each light incident surface. The light beams enter each light guide plate through each light incident surface and are emitted through each light exit surface. The optical film stack is stacked on the display module. The light exit surface faces the optical film stack. The panel is stacked on the optical film stack. The optical film stack is located between the panel and the display module.

[0020] In an embodiment of the present invention, the above display device further includes a control unit. The control unit is disposed on the bottom plate and is used to control the light emitting brightness of at least one of these light sources to be different from the light emitting brightness of at least another one of these light sources.

[0021] Based on the above, in the display module of the present invention, the light source is disposed in the accommodation space between the light guide plates, and the light beam emitted by the light source can enter each light incident surface of each light guide plate and be emitted through each light exit surface. Since the light source is located in the accommodation space between the light guide plates as described above instead of on the back side of the light guide plates, the thickness of the display module can be effectively reduced, making the appearance thin, light, and beautiful, and also saving the manufacturing cost. At the same time, under the configuration layout of the present invention, not only is it beneficial to modular assembly, but when the number of light sources is multiple and they are respectively located in multiple accommodation spaces between the light guide plates, each light source is also suitable for independent control, and the effect of regional dimming can be achieved, thereby enhancing the contrast of the picture and reducing the backlight power consumption. Description of the Drawings

[0022] Figure 1 is a schematic diagram of a display device according to an embodiment of the present invention.

[0023] Figure 2 is Figure 1 a component exploded view of the display device.

[0024] Figure 3 is Figure 2 a component exploded view of the display module.

[0025] Figure 4A is Figure 2 a top view of the display module.

[0026] Figure 4B is Figure 4A a partial enlarged view of the display module.

[0027] Figure 5 is Figure 4A a partial perspective view of the display module.

[0028] Figure 6A is Figure 4A a partial enlarged view of another perspective of the display module.

[0029] Figure 6B is Figure 3 a bottom view schematic diagram of a single light guide plate.

[0030] Figure 7 is Figure 6A a partial cross-sectional view of the display module.

[0031] Figure 8A is Figure 2 a partial top view schematic diagram of the substrate.

[0032] Figure 8B is Figure 2 a partial top view schematic diagram of the backplane.

[0033] Figure 8C Yes Figure 2 Upper view schematic diagram of the reflection box of

[0034] Figure 8D Yes Figure 8C Partial three-dimensional schematic diagram of the reflection box of

[0035] Description of main component symbols:

[0036] 10 Display device

[0037] 100 Display module

[0038] 110 Light guide plate

[0039] 112 Back surface

[0040] 114 Side surface

[0041] 116 Dot matrix

[0042] 120, 120a, 120b Light source

[0043] 122 Light-emitting element

[0044] 122a Light-emitting surface

[0045] 130 Reflection box

[0046] 132 Bottom wall

[0047] 134 Side wall

[0048] 136a, 136b, 138a, 138b Hook

[0049] 140 Substrate

[0050] 142a, 142b Hook hole

[0051] 144 Locking hole

[0052] 150 Back plate

[0053] 152 Groove

[0054] 154a, 154b Hook hole

[0055] 156 Locking part

[0056] 160 Support

[0057] 202 Bottom plate

[0058] 204 Optical film group

[0059] 206 Panel

[0060] 208 Control unit

[0061] D extension direction

[0062] F1 light incident surface

[0063] F2 light exit surface

[0064] G spacing

[0065] H1, H2 height

[0066] S accommodation space

[0067] T thickness

[0068] U notch Detailed implementation manners

[0069] Figure 1 is a schematic diagram of a display device according to an embodiment of the present invention. Figure 2 is Figure 1 a component exploded view of the display device. Figure 2 The control unit in is shown in dashed lines. Please refer to Figure 1 and Figure 2 , the display device 10 of the present embodiment is, for example, a mini light-emitting diode display with a local dimming function, and includes a display module 100 ( Figure 2 ), a bottom plate 202, an optical film group 204 ( Figure 2 ), a panel 206, and a control unit 208 ( Figure 2 ).

[0070] The display module 100 of the present embodiment is disposed on the bottom plate 202, and the light beam emitted therefrom can irradiate the optical film group 204 and the panel 206 to form a display screen. The optical film group 204 is stacked on the display module 100 and located between the panel 206 and the display module 100, and can further diffuse the light beam from the display module 100 to make the emission brightness uniform. The panel 206 is, for example, a liquid crystal panel generally called an OC (Open Cell) panel and is stacked on the optical film group 204. The control unit 208 is disposed on the bottom plate 202 and connected to the display module 100 to control the display module 100.

[0071] Figure 3 is Figure 2 a component exploded view of the display module. Figure 4A is Figure 2 a top view of the display module. Figure 4B is Figure 4A a partial enlarged view of the display module. Figure 4B The accommodation space S in is shown in dashed lines. Please refer to Figure 3 andFigure 4A and Figure 4B , specifically, the display module 100 includes a plurality of light guide plates 110 and a plurality of light sources 120, and the light guide plates 110 and the light sources 120 are arranged in an array as shown Figure 4A . Each light guide plate 110 is provided with at least one light incident surface F1 ( Figure 4B ) and a light exit surface F2, and the light exit surface F2 faces the optical film group 204 ( Figure 2 ). At least one accommodation space S is formed around between the light incident surface F1 of the light guide plate 110 and the light incident surface F1 of the adjacent light guide plate 110. The light source 120 is disposed in the accommodation space S and is adapted to emit light beams toward each light incident surface F1, and the light beams enter each light guide plate 110 through each light incident surface F1 and are emitted through each light exit surface F2.

[0072] Since the light source 120 of this embodiment is disposed on the side of the light guide plate 110, the light beam emitted by the light source 120 enters the light guide plate 110 from the light incident surface F1 and then is emitted through the light exit surface F2. That is to say, the light source 120 is located in the accommodation space S between the light guide plates 110 instead of on the back surface 112 of the light guide plate 110, thereby effectively reducing the thickness of the display module 100, making the display device 10 ( Figure 1 ) thin, light, and beautiful, and reducing the manufacturing cost.

[0073] On the other hand, as shown Figure 4B , the number of the accommodation spaces S in this embodiment is multiple, the number of the light sources 120 is multiple, and the light sources 120 are respectively disposed in the accommodation spaces S. In this configuration layout, the control unit 208 can control the emission brightness of at least one of the light sources 120 (for example, the light source 120a in Figure 4A and Figure 4B ) to be different from the emission brightness of at least one of the other light sources 120 (for example, the light source 120b in Figure 4A and Figure 4B ), so as to achieve the effect of regional dimming, improve the contrast of the picture, and reduce the backlight power consumption.

[0074] In addition, the light guide plates 110 and the light sources 120 of this embodiment are arranged in an array, which is also beneficial to modular assembly and can further save the manufacturing cost. The specific structure of the display module 100 of this embodiment will be described in detail below.

[0075] Figure 5 is Figure 4A a partial perspective view of the display module. Figure 6A is Figure 4A a partial enlarged view of another perspective of the display module. It should be noted that, in order to clearly present the internal structure of the display module 100, Figure 5 the light guide plate 110 of Figure 5Only four light guide plates 110 and reflection boxes 130 are shown, and only one substrate 140 is shown. Additionally, Figure 6A The accommodation space S in [reference] is shown by a dashed line.

[0076] Please refer to Figure 5 and Figure 6A , in this embodiment, the backplane 150 is provided with a plurality of grooves 152. The grooves 152 are recessed from the inner surface (not labeled) of the backplane 150 in a direction away from the reflection box 130. The plurality of grooves 152 are adapted to respectively accommodate the substrate 140. The display module 100 of this embodiment further includes a plurality of reflection boxes 130 that respectively accommodate the light guide plates 110. Each reflection box 130 includes a bottom wall 132 and at least one side wall 134 connected to the bottom wall 132. The reflection box 130 has at least one reflection surface. The reflection surface is, for example, made of a material with a high reflectivity and can be provided on the bottom wall 132 and the side walls 134 to reflect the light beam entering the reflection box 130. In addition, the number of the side walls 134 in this embodiment is a plurality (shown as four), and the adjacent two side walls 134 and the bottom wall 132 surround and form a notch U.

[0077] On the other hand, each light guide plate 110 of this embodiment has a back surface 112 relative to the light-emitting surface F2 and at least one side surface 114 (shown as four) adjacent to the light-incident surface F1. The light guide plate 110 includes, for example, four side surfaces 114, and the four side surfaces 114 surround and form a quadrilateral. The light guide plate 110 may include four light-incident surfaces F1, and both sides of each light-incident surface F1 can be respectively connected to two side surfaces 114, and each light-incident surface F1 can be located at the four corners of the light guide plate 110. Taking Figure 5 and Figure 6A the four light guide plates 110 shown in [reference] as an example, the light-incident surfaces F1 of these adjacent light guide plates 110 surround and form a rectangular area to form the accommodation space S.

[0078] When each light guide plate 110 is disposed in the corresponding reflection box 130, the back surface 112 of the light guide plate 110 faces the corresponding bottom wall 132, and the side surfaces 114 of the light guide surface face the corresponding side walls 134. At the same time, as Figure 6A shown, the notch U of the reflection box 130 is aligned with the light-incident surface F1 and communicates with the accommodation space S, so that the light beam emitted by the light source 120 located in the accommodation space S can enter the light guide plate 110 through the light-incident surface F1 without hindrance, bringing a good light-incident effect.

[0079] As Figure 6AAs shown, the light source 120 of this embodiment includes a plurality of light-emitting elements 122 (illustrated as four), and the light source 120 is disposed on the substrate 140. These light-emitting elements 122 are, for example, micro light-emitting diodes, each facing a corresponding incident light surface F1 and having a light-emitting surface 122a. The light beam emitted by the light-emitting element 122 is emitted through the light-emitting surface 122a. The light-emitting surface 122a is parallel to the corresponding incident light surface F1, and the area of the incident light surface F1 is larger than the area of the light-emitting surface 122a to ensure that the incident light surface F1 completely receives the light beam generated by the light-emitting element 122. In addition, by using the encapsulation process, the light-emitting element 122 can be designed to have only one light-emitting surface 122a to prevent the light beam emitted by a single light-emitting element 122 from entering multiple light guide plates 110 simultaneously. Additionally, there is a spacing G between the light-emitting surface 122a and the corresponding light guide plate 110, which can prevent the light-emitting element 122 from colliding with the light guide plate 110 and being damaged.

[0080] After the light beam emitted by the light-emitting element 122 passes through the incident light surface F1 located on the side of the light guide plate 110, the reflecting surfaces on the bottom wall 132 and the side wall 134 of the reflecting box 130 can reflect the light beam toward the light-emitting surface F2 of the light guide plate 110, causing the light beam to leave the light guide plate 110 through the light-emitting surface F2 and reach the optical film group 204 ( Figure 2 ) and the panel 206 ( Figure 2 ), thereby forming a display screen.

[0081] In other words, through the specific configuration among the light guide plate 110, the reflecting box 130, and the light-emitting element 122 in this embodiment, the light source 120 is located in the accommodation space S between the light guide plates 110 as described above instead of on the back surface 112 of the light guide plate 110. Compared with traditional micro light-emitting diode displays with a local dimming function, the thickness of the device is effectively reduced, making the appearance of the display device 10 ( Figure 1 ) thin, light, and aesthetically pleasing, and helping to reduce the manufacturing cost.

[0082] In addition, general light-emitting diode displays with side-in type backlight modules do not have the effect of local dimming, and since the light source 120 is disposed on the frame of the display, the width and thickness of the frame are relatively large and not aesthetically pleasing. In contrast, in this embodiment, the light sources 120 are separated from each other, and the control unit 208 ( Figure 2 ) controls the light-emitting brightness of each light source 120 respectively. For example, four light-emitting elements 122 are controlled as a group to achieve the function of local dimming, enhance the contrast of the screen, and reduce the power consumption of the light source 120. Also, since the light source 120 of this embodiment is disposed in the accommodation space S between the light guide plates 110 instead of on the frame of the display device 10, the size of the frame can be reduced, and even a borderless design can be achieved, thereby enhancing the aesthetic appearance.

[0083] Figure 6BYes Figure 3 The upward view schematic diagram of the single light guide plate of Figure 6B . Please refer to

[0084] Figure 7 Yes Figure 6A The partial cross-sectional view of the display module of Figure 7 . Please refer to Figure 6A and Figure 7 . As shown in Figure 2 , the display module 100 of this embodiment further includes at least one support member 160. The support member 160 is disposed in the accommodation space S and located between the light-emitting elements 122. The height H2 of the support member 160 is greater than the height H1 of the light-emitting element 122. The support member 160 is used to support the optical film stack 204 ([[]] Figure 2 ) stacked on the display module 100 to prevent the optical film stack 204 from colliding with or squeezing the light-emitting elements 122.

[0085] Next, the assembly method of the display module 100 of this embodiment will be described. Figure 8A Yes Figure 2 The partial top view schematic diagram of the substrate of Figure 8B Yes Figure 2 The partial top view schematic diagram of the backplane of Figure 3 , Figure 5 , Figure 8A and Figure 8B . The display module 100 of this embodiment further includes at least one substrate 140 ([[]] Figure 3 illustrated as multiple) and a backplane 150. The light source 120 is disposed on the substrate 140. As Figure 8A shown, the light sources 120 are spaced along the extension direction D of the substrate 140 on the substrate 140, which is convenient for assembling multiple light sources 120 to the backplane 150.

[0086] Please refer to Figure 8A and 8B . The substrate 140 includes at least one hook hole 142a, 142b and at least one locking hole 144, and the backplane 150 ([[[]] Figure 8B ) includes at least one hook hole 154a, 154b ([[[]] Figure 8B ) and at least one locking portion 156 ([[[]] Figure 8B)。The substrate 140 can be attached to the attachment portion 156 of the backplane 150 by a locking attachment such as a screw passing through the locking holes 144 of the substrate 140, so that the substrate 140 is stably disposed in the groove 152 of the backplane 150 as Figure 5 shown.

[0087] Figure 8C is Figure 2 a top view schematic diagram of the reflection box of Figure 8D is Figure 8C a partial perspective schematic diagram of the reflection box of Figures 8A to 8D . Referring to Figure 8C , the reflection box 130 of the present embodiment ( Figure 8C ) has a plurality of hooks 136a, 136b, 138a, 138b ( Figure 8B ) to clamp the reflection box 130 to the substrate 140 and the backplane 150 (

[0088] Specifically, after the substrate 140 is disposed in the groove 152 of the backplane 150 as Figure 5 shown, the hooks 138a, 138b of the reflection box 130 can be respectively engaged with the corresponding hook holes 142a of one substrate 140 and the hook holes 142b of another substrate 140, and the hooks 136a, 136b of the reflection box 130 can be respectively engaged with the corresponding hook holes 154a and 154b of the backplane 150. For example, when the hook 136a of the reflection box 130 is engaged with Figure 8B the right hook hole 154a in Figure 8B , the hook 136b of the reflection box 130 can be engaged with

[0089] In summary, in the display module of the present invention, the light source is disposed in the accommodation space between the light guide plates, and the light beam emitted by the light source can enter each light incident surface of each light guide plate and exit through each light exit surface. Since the light source is located in the accommodation space between the light guide plates as described above rather than on the back side of the light guide plates, the thickness of the display module is effectively reduced, making the appearance thin, light and beautiful, and also saving the manufacturing cost. At the same time, under the configuration layout of the present invention, not only is it beneficial to modular assembly, when the number of light sources is multiple and are respectively located in multiple accommodation spaces between the light guide plates, each light source is also suitable for independent control, so as to achieve the effect of regional dimming, thereby enhancing the contrast of the picture and reducing the backlight power consumption. In addition, since the light source is disposed in the accommodation space between the light guide plates rather than the frame, the size of the frame can be reduced, and even a borderless design can be achieved, thereby enhancing the appearance beauty.

Claims

1. A display module, the display module comprises: a plurality of light guide plates, each light guide plate is provided with a light incident surface and a light exit surface, and a receiving space is formed around between the light incident surfaces of adjacent light guide plates; and a light source, the light source is disposed in the receiving space and is adapted to emit light beams to each of the light incident surfaces, wherein the light beams enter each light guide plate through each light incident surface and are emitted through each light exit surface.

2. The display module according to claim 1, the display module further comprises a plurality of reflection boxes, wherein each reflection box has at least one reflection surface, and the light guide plates are respectively received in the reflection boxes.

3. The display module according to claim 2, wherein each light guide plate has a back surface opposite to the light exit surface and a side surface adjacent to the light incident surface, each reflection box includes a bottom wall and a side wall connected to the bottom wall, the back surface of each light guide plate faces the bottom wall of the corresponding reflection box, and the side surface of each light guide plate faces the side wall of the corresponding reflection box.

4. The display module according to claim 3, wherein the reflection box includes a plurality of the side walls, and a notch is formed around between two adjacent side walls and the bottom wall, the notch is aligned with the light incident surface and communicates with the receiving space.

5. The display module according to claim 3, wherein a plurality of dot patterns are provided on the back surface of each light guide plate, and the sizes of the dot patterns gradually increase from the side surface to a central region of the back surface.

6. The display module according to claim 2, the display module further comprises a substrate, wherein the light source is disposed on the substrate, and each reflection box is provided with a hook, and the hook is engaged with the substrate.

7. The display module according to claim 6, the display module further comprises a back plate, wherein each reflection box is provided with another hook, and the another hook is engaged with the back plate, and the substrate is locked to the back plate.

8. The display module according to claim 1, wherein the light source includes a light emitting element, and the light emitting element faces the light incident surface.

9. The display module according to claim 8, wherein the thickness of each light guide plate is greater than or equal to the height of the light emitting element.

10. The display module according to claim 8, wherein the light emitting element has a light emitting surface, and the area of the light incident surface is greater than the area of the light emitting surface.

11. The display module according to claim 8, wherein the light emitting element has a light emitting surface, and the light incident surface is parallel to the light emitting surface.

12. The display module according to claim 8, the display module further comprises a support member, wherein the support member is disposed in the receiving space, and the height of the support member is greater than the height of the light emitting element.

13. The display module according to claim 1, wherein the light guide plate has a back surface opposite to the light exit surface, and the back surface has a plurality of dot patterns.

14. The display module according to claim 1, the display module includes a plurality of the receiving spaces and a plurality of the light sources, the light sources are respectively disposed in the receiving spaces, and the light guide plates and the light sources are arranged in an array.

15. A display device, the display device comprises: a display module, the display module includes: a plurality of light guide plates, each light guide plate has a light incident surface and a light exit surface, and a receiving space is formed between the light incident surfaces of adjacent light guide plates; and A light source is disposed in the accommodating space and is adapted to emit light beams toward the respective light incident surfaces, wherein the light beams enter the respective light guide plates through the respective light incident surfaces and are emitted through the respective light exit surfaces; An optical film group is stacked on the display module, wherein the light exit surface faces the optical film group; and A panel is stacked on the optical film group, wherein the optical film group is located between the panel and the display module.

16. The display device according to claim 15, further comprising a plurality of reflection boxes, wherein each of the reflection boxes has at least one reflection surface, and the light guide plates are respectively accommodated in the reflection boxes.

17. The display device according to claim 16, wherein each of the light guide plates has a back surface opposite to the light exit surface and a side surface adjacent to the light incident surface, each of the reflection boxes includes a bottom wall and a side wall connected to the bottom wall, the back surface of each of the light guide plates faces the bottom wall of the corresponding reflection box, and the side surface of each of the light guide plates faces the side wall of the corresponding reflection box.

18. The display device according to claim 17, wherein the reflection box includes a plurality of the side walls, and a notch is formed by surrounding between two adjacent side walls and the bottom wall, and the notch is aligned with the light incident surface and communicates with the accommodating space.

19. The display device according to claim 17, wherein a plurality of dots are provided on the back surface of each of the light guide plates, and the sizes of the dots gradually increase from the side surface to a central area of the back surface.

20. The display device according to claim 16, further comprising a substrate, wherein the light source is disposed on the substrate, and each of the reflection boxes is provided with a hook, and the hook is engaged with the substrate.

21. The display device according to claim 20, further comprising a back plate, wherein each of the reflection boxes is provided with another hook, and the another hook is engaged with the back plate, and the substrate is locked to the back plate.

22. The display device according to claim 15, wherein the light source includes a plurality of light emitting elements, and the light emitting elements respectively face the light incident surfaces.

23. The display device according to claim 15, the display device includes a plurality of the accommodating spaces and a plurality of the light sources, and the light sources are respectively disposed in the accommodating spaces, wherein the light guide plates and the light sources are arranged in an array.

24. The display device according to claim 23, further comprising a control unit, wherein the control unit is disposed on the bottom plate, and the control unit is configured to control the light emitting brightness of at least one of the light sources to be different from the light emitting brightness of at least another one of the light sources.

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