Display module and display device

Abstract

The present application discloses a display module and a display device, wherein the display module includes a display panel and a backlight module arranged on the back side of the display panel, the display panel has a display area and a frame area located outside the display area, and the backlight module includes a bottom frame and a lamp board; the lamp board is arranged on the side of the bottom frame facing the display panel, the lamp board includes a light-emitting area and a wiring area located on one side of the light-emitting area, the wiring area is arranged at a position corresponding to the frame area, a plurality of lamp beads are arranged in an array at positions corresponding to the light-emitting areas, and a connecting wiring is provided on the lamp board at positions corresponding to the wiring area for electrically connecting each lamp bead to an external power supply; wherein the plurality of lamp beads include a plurality of edge lamp bead groups located at the outermost periphery, and at least the edge lamp bead groups are arranged at positions corresponding to the frame area; in this way, the display brightness at the edge positions of the display area of ​​the display panel can be improved, and the problem of dark edges around the display panel when displaying can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0002] Mini-LED displays usually refer to LCD displays that use Mini-LED backlight technology; Mini-LED backlight technology uses hundreds of direct-lit light-control matrices composed of at least a few thousand and at most tens of thousands of Mini-LED lamp beads, where the size of the lamp beads is less than 1 mm; under normal circumstances, the brightness of the lamp beads at the outer edges is dimmer than that of the lamp beads in the center position; because the lamp beads in the relatively dark edge areas are generally set at the edge positions corresponding to the display area of ​​the display panel, the display panel will appear dark around when displaying. Summary of the Invention

[0003] Embodiments of the present application provide a display module and a display device, which can improve the display brightness at the edge of the display area of ​​the display panel and improve the problem of dark edges around the display panel during display.

[0004] In a first aspect, an embodiment of the present application provides a display module, comprising a display panel and a backlight module disposed on the back side of the display panel, wherein the display panel has a display area and a frame area located outside the display area, and the backlight module comprises:

[0005] bottom frame; and,

[0006] A light board, the light board being arranged on a side of the bottom frame facing the display panel, the light board comprising a light-emitting area and a wiring area on one side of the light-emitting area, the wiring area being arranged corresponding to the position of the frame area, the light board being provided with a plurality of lamp beads arranged in an array at positions corresponding to the light-emitting area, and the light board being provided with connecting wiring at positions corresponding to the wiring area for electrically connecting each of the lamp beads to an external power supply;

[0007] The plurality of lamp beads include an edge lamp bead group located at the outermost periphery, and at least the edge lamp bead group is arranged at a position corresponding to the border area.

[0008] In one embodiment, the backlight module further includes a plastic frame, the plastic frame being arranged around the periphery of the light-emitting area, the plastic frame including four side edges, the four side edges corresponding one-to-one to the four edges of the light-emitting area, one of the side edges being arranged on the light board and in the wiring area, and the other three side edges being located outside the light board and arranged on the bottom frame;

[0009] A surface of the plastic frame facing the display panel is used to support the display panel.

[0010] In one embodiment, the backlight module further includes a plastic frame, which is disposed on the light board. The plastic frame includes four side edges, which correspond one-to-one to the edges of the light-emitting area. One of the side edges is located in the wiring area, and the other three side edges are located in the light-emitting area.

[0011] A surface of the plastic frame facing the display panel is used to support the display panel.

[0012] In one embodiment, the plurality of lamp beads further include a sub-edge lamp bead group arranged close to the edge lamp bead group, the sub-edge lamp bead group including a plurality of sub-edge lamp beads arranged in a circle on the inner side of the edge lamp bead group, and each of the sub-edge lamp beads is arranged at least partially corresponding to the position of the border area.

[0013] In one embodiment, the bottom frame includes a bottom plate and side plates, wherein the side plates extend along the circumference of the bottom plate and together with the bottom plate form a receiving cavity;

[0014] The lamp board is located in the accommodating cavity and is arranged on the bottom plate;

[0015] The plastic frame is located in the accommodating cavity, and any side edge of the plastic frame extends along the thickness direction of the light board, and any side edge of the plastic frame is arranged in parallel with the side panel on the corresponding side.

[0016] In one embodiment, the four side edges include a first side edge arranged on the routing area of ​​the light board, and the inner surface of the first side edge is provided with a reflective slope, and the reflective slope is inclined toward one side of the light board in the direction from the light board to the display panel.

[0017] In one embodiment, the plane roughness of the reflective inclined surface is set to 0.02-0.16; and / or,

[0018] The angle between the reflecting inclined surface and the light board is set to θ, wherein 0°<θ<90°.

[0019] In one embodiment, the reflective inclined surface is coated with a first reflective layer.

[0020] In one embodiment, a second reflective layer is provided on a surface of the light board facing the display panel, and the second reflective layer is located in the wiring area.

[0021] In a second aspect, an embodiment of the present application further provides a display device, which includes the above-mentioned display module.

[0022] Beneficial effect: In the display module provided by the present application, a backlight module is arranged on the back side of the display panel, and the backlight module includes a bottom frame and a lamp board, and the lamp board is arranged on the side of the bottom frame facing the display panel, and the lamp board has a light-emitting area and a wiring area, and the wiring area is arranged corresponding to the position of the border area, and the light-emitting area array on the lamp board is provided with a plurality of lamp beads, and the plurality of lamp beads are electrically connected to the external power supply through the connecting wiring in the wiring area; the plurality of the lamp beads include an edge lamp bead group at the outermost periphery, and at least the edge lamp bead group is arranged corresponding to the position of the border area; that is, the plurality of edge lamp beads with the darkest brightness among the plurality of the lamp beads are moved to the position corresponding to the border area, so that the plurality of edge lamp beads with the darkest brightness are away from the edge of the display area of ​​the display panel, thereby improving the display brightness of the edge position of the display area of ​​the display panel, and improving the problem of dark edges around the display panel when displaying. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0024] Figure 1 A schematic diagram of the first structure of the display module provided in an embodiment of the present application;

[0025] Figure 2 A second structural diagram of the display module provided in an embodiment of the present application;

[0026] Figure 3 A third structural diagram of the display module provided in an embodiment of the present application;

[0027] Figure 4 A fourth structural diagram of a display module provided in an embodiment of the present application;

[0028] Figure 5 This is a schematic diagram of the arrangement of the lamp beads of the backlight module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of this application and should not be construed as limiting this application. Furthermore, unless otherwise expressly provided or limited, a first feature being "above" or "below" a second feature merely indicates that the first feature is at a higher or lower level than the second feature, and does not indicate a direct connection.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only, and features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense without specifically limiting the connection method. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The disclosure below provides many different embodiments for realizing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the present application. In addition, the examples of various specific processes and materials provided in the present application, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0034] Embodiments of the present application provide a display module and a display device. This application does not limit the specific form of the display device; the display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system. The display module is configured as a display module of any of the above devices.

[0035] In existing Mini-LED backlight technology, Mini-LED light panels generally use white light Mini chips or blue light Mini chips. A predetermined width is reserved on the lower side of the Mini-LED light panel as a routing area. The routing lines arranged in the routing area connect the lamp beads and the external power supply. Due to the influence of the metal routing, the lamp beads in the central area closer to the routing area are brighter, and the lamp beads in the edge area farther away from the routing area are darker, causing the display area of ​​the display panel to be dark around the edges when displaying. In particular, when the Mini-LED light panel uses a blue light Mini chip, QD film material (quantum dot conversion film) needs to be used in the optical film group. However, there is a failure zone of a certain width at the edge of the QD film material, which will allow some blue light to directly enter the failure zone, causing the edges of the display panel to be blue. To improve the blueing problem around the edges of the display panel, the plastic frame is usually set to an L-shaped structure. Although the L-shaped plastic frame can improve the blueing problem around the edges of the display panel, it will bring the edge of the light panel closer to the display area of ​​the display panel, causing the display area of ​​the display panel to be dark around the edges when displaying.

[0036] In a first aspect, an embodiment of the present application provides a display module 100. Figure 1 and Figure 5 The display module 100 includes a display panel 1 and a backlight module 2 arranged on the back side of the display panel 1, the display panel 1 has a display area 1a and a border area 1b located outside the display area 1a, the backlight module 2 includes a bottom frame 21 and a lamp board 22; the lamp board 22 is arranged on the side of the bottom frame 21 facing the display panel 1, the lamp board 22 includes a light-emitting area 22a and a wiring area 22b located on one side of the light-emitting area 22a, the wiring area 22b is arranged corresponding to the position of the border area 1b, the lamp board 22 is arrayed with a plurality of lamp beads 23 at the position corresponding to the light-emitting area 22a, the lamp board 22 is provided with a connecting wiring at the position corresponding to the wiring area 22b, for electrically connecting each of the lamp beads 23 and an external power supply; wherein, the plurality of lamp beads 23 include an edge lamp bead group located at the outermost edge, and at least the edge lamp bead group is arranged corresponding to the position of the border area 1b.

[0037] In the display module 100 provided in the present application, a backlight module 2 is provided on the back side of the display panel 1, and the backlight module 2 includes a bottom frame 21 and a light board 22. The light board 22 is provided on the side of the bottom frame 21 facing the display panel 1. The light board 22 has a light-emitting area 22a and a wiring area 22b. The wiring area 22b is provided at a position corresponding to the frame area 1b. The light-emitting area 22a on the light board 22 is arrayed with a plurality of lamp beads 23. The plurality of lamp beads 23 are electrically connected to an external power supply through the connecting wiring in the wiring area 22b. ; The plurality of lamp beads 23 include an edge lamp bead group at the outermost periphery, and at least the edge lamp bead group is arranged corresponding to the position of the border area 1b; that is, the plurality of edge lamp beads 231 with the darkest brightness among the plurality of lamp beads 23 are moved to the position corresponding to the border area 1b, so that the plurality of edge lamp beads 231 with the darkest brightness are away from the edge of the display area 1a of the display panel 1, thereby improving the display brightness of the edge position of the display area 1a of the display panel 1, and improving the problem of dark edges around the display panel 1 when displaying.

[0038] It should be noted that the light board 22 is configured as a mini-LED light board; and the lamp beads 23 are configured as mini-LED chips.

[0039] The present application does not impose any specific restrictions on the fixing method of the light board 22. In one embodiment, the light board 22 can be fixed to the bottom plate 211 by adhesive bonding.

[0040] Furthermore, the present application does not impose any specific restrictions on the shape of the light board 22. The light board 22 may be circular, angular, polygonal, or irregularly shaped. The following description will take "the light board 22 being a square light board 22" as a specific embodiment.

[0041] This application does not impose any specific restrictions on the structure of the bottom frame 21. In one embodiment, the bottom frame 21 includes a bottom plate 211 and side plates 212. The side plates 212 extend along the periphery of the bottom plate 211 and, together with the bottom plate 211, form a receiving cavity 213. The light board 22 is disposed within the receiving cavity 213 and positioned above the bottom plate 211. The display panel 1 is disposed on the side of the light board 22 away from the bottom plate 211.

[0042] It is understandable that the backlight module 2 further includes a plastic frame 24 for supporting the display panel 1. The present application does not impose any specific restrictions on the structure and location of the plastic frame 24.

[0043] See also Figure 1In one embodiment, the plastic frame 24 is arranged around the periphery of the light-emitting area 22a, and the plastic frame 24 includes four side edges, which correspond one-to-one to the four edges of the light-emitting area 22a. One of the side edges is arranged on the light board 22 and is located in the wiring area 22b, and the other three side edges are located on the outside of the light board 22 and are arranged on the bottom frame 21; the side surface of the plastic frame 24 facing the display panel 1 is used to support the display panel 1.

[0044] In this embodiment, the light board is square in shape, and the light-emitting area 22a is also square in shape, having four side edges; the four side edges include a first side edge, a second side edge, a third side edge, and a fourth side edge connected end to end, which are used to enclose the plastic frame 24 to form a ring frame, the first side edge is placed on the wiring area 22b, and corresponds to a side edge of the light-emitting area 22a close to the wiring area 22b, the second side edge, the third side edge, and the fourth side edge correspond to the other three side edges of the light-emitting area 22a respectively; the other three sides of the plastic frame 24 are provided on the bottom plate 211, And it is located on the outside of the light board 22; it can be known that, on the basis of ensuring that the plastic frame 24 stably supports the display panel 1, the plastic frame 24 can be made as thin as possible, so as to provide more sufficient space for the light board 22, so that the edge lamp beads 231 on the light board 22 can be further approached toward the side panel 212, and then the edge lamp beads 231 can be further away from the edge of the display area 1a of the display panel 1. In this way, the display brightness of the edge position of the display area 1a of the display panel 1 can be further improved, and the problem of dark edges around the display panel 1 when displaying can be improved.

[0045] This application does not impose any specific restrictions on the thickness of the plastic frame 24. On the basis of ensuring that the plastic frame 24 stably supports the display panel 1, the thickness of the plastic frame 24 can be set to W in the direction along the light board 22 pointing to the side panel 212, where W is greater than or equal to 0.3 mm.

[0046] See also Figure 2 In another embodiment, the backlight module 2 further includes a plastic frame 24, which is disposed on the light board 22. The plastic frame 24 includes four side edges, and the four side edges correspond one-to-one to the four edges of the light-emitting area 22a. One of the side edges of the plastic frame 24 is located in the wiring area 22b, and the other three side edges are located in the light-emitting area 22a. The side surface of the plastic frame 24 facing the display panel 1 is used to support the display panel 1.

[0047] In this embodiment, the light board 22 extends further toward the side panel 212. There is insufficient space between the light board 22 and the side panel 212 for the plastic frame 24 to be placed. The plastic frame 24 is entirely disposed on the light board, with one side edge of the plastic frame 24 positioned in the wiring area 22b, and the other three sides positioned in the light-emitting area 22a. This ensures the structural integrity of the display panel 1 while allowing the edge lamp beads 231 on the light board 22 to move further toward the side panel 212, thereby allowing the edge lamp beads 231 to move further away from the edge of the display area 1a of the display panel 1. This further improves the display brightness at the edge of the display area 1a of the display panel 1, improving the problem of dark edges around the display panel 1 when displaying.

[0048] It should be noted that the present application does not make any specific arrangement for the structure of the plastic frame 24. However, in order to maximize the space for the light board 22 to extend toward the side panels 212, in one embodiment, the bottom frame 21 includes a bottom panel 211 and side panels 212. The side panels 212 extend along the circumference of the bottom panel 211 and together with the bottom panel 211 form a receiving cavity 213. The light board 22 is located in the receiving cavity 213 and is arranged on the bottom panel 211. The plastic frame 24 is located in the receiving cavity 213. Any side edge of the plastic frame 24 extends along the thickness direction of the light board 22, and any side edge of the plastic frame 24 is parallel to the side panel 212 on the corresponding side. In other words, please refer to Figure 1 and Figure 2 Different from the prior art, the plastic frame 24 of the embodiment of the present application is set in an "L" shape, so that a larger extension space can be provided for the light board 22.

[0049] This application does not impose any specific restrictions on the size of the light board 22. If space permits, the side edges of the light board 22 can be as close as possible to the side panels 212, thereby allowing the edge lamp beads 231 to be away from the edge of the display area 1a of the display panel 1. In one embodiment, the light board 22 has three side walls corresponding to the other three sides of the plastic frame 24. The spacing between each side wall and the corresponding side panel 212 is set to H, where H is less than or equal to 0.05 mm.

[0050] It can be understood that when the light board 22 is further extended toward the side panel 212, the multiple lamp beads 23 on the light board 22 are further moved toward the position of the border area 1b; among the multiple lamp beads 23, a sub-edge lamp bead group is also included near the edge lamp bead group, and the sub-edge lamp bead group includes a plurality of sub-edge lamp beads 232 arranged in a ring on the inner side of the edge lamp bead group; each of the sub-edge lamp beads 232 is at least partially arranged corresponding to the position of the border area 1b; since the brightness of the sub-edge lamp beads 232 is greater than the brightness of the edge lamp beads 231, the lamp beads 23 on the side of the sub-edge lamp beads 232 away from the edge lamp beads 231 will also be brighter. Therefore, when the sub-edge lamp beads 232 are also at least partially placed in the border area 1b, the brightness of the lamp beads 23 corresponding to the edge position of the display area 1a will be brighter, thereby further improving the display brightness of the edge position of the display area 1a of the display panel 1, and improving the problem of dark edges around the display panel 1 when displaying.

[0051] See also Figure 3 One side of the plastic frame 24 is disposed on the light board 22 and is located in the wiring area 22 b, and is fixed to the light board 22 by adhesive bonding.

[0052] It is understood that due to wiring layout requirements, the width of the wiring area 22b must be reserved on the light board 22. Typically, the width of the wiring area 22b is set to 1.5 mm. Therefore, the darkening problem on the edge of the display panel 1 on the side of the wiring area 22b cannot be simply improved by extending the light-emitting area 22a of the light board 22. Even if the darkening problem is improved by extending the light board 22, the width of the border area 1b on that side will be significantly increased, thereby reducing the quality of the display panel 1.

[0053] See also Figure 4The side of the plastic frame 24 arranged on the wiring area 22b of the light board 22 is set as a first side 241, and the inner surface of the first side 241 is provided with a reflective slope 242. In the direction from the light board 22 to the display panel 1, the reflective slope 242 is inclined toward one side of the light board 22. It can be known that, under normal circumstances, the light emission angle of the lamp beads 23 used on the Mini-LED light board 22 is 120°. Of course, lamp beads 23 with other emission angles can also be used; when the light emission angle of the lamp beads 23 is large, part of the light will be directly emitted to the plastic frame 24. By setting the reflecting bevel 242, this part of the light can be reflected and reflected into the optical film, so that this part of the light can be reasonably utilized, the utilization rate of the light is improved, and the brightness of the display module 100 is increased; and it can be understood that this part of the light enters from the side of the optical film. After the light passes through the optical film, most of the light will reach the edge position of the display area 1a, thereby improving the edge display brightness of the display area 1a and improving the edge darkening problem.

[0054] This application does not impose any specific restrictions on the parameters of the reflective bevel 242. In one embodiment, the surface roughness of the reflective bevel 242 is set to 0.02 to 0.16; that is, the reflective bevel 242 is polished to achieve a mirror-like effect. Light emitted from the lamp beads 23 is mirror-reflected upon reaching the reflective bevel 242, thereby being smoothly reflected to the side of the optical film, thereby improving light utilization.

[0055] In one embodiment, the angle between the reflective bevel 242 and the light board 22 is set to θ, where 0°<θ<90°; in this way, the reflective bevel 242 can reflect the light reaching the plastic frame 24 to the side of the optical film, so that more light can reach the edge position of the display area 1a, thereby improving the edge display brightness of the display area 1a and improving the edge darkening problem.

[0056] It should be noted that the above two technical features can be set either one or both; in one embodiment, the above two technical features are set simultaneously.

[0057] The present application does not impose any specific limitation on the angle θ; the angle θ may be 10°, 20°, 30°, 40°, 50°, 60°, 70° or 80°; preferably, the angle θ is set to 45°.

[0058] In one embodiment, the reflective bevel 242 has an inclination angle of 45°, and a first reflective layer is coated on the reflective bevel 242. By providing the first reflective layer, when the light emitted by the lamp beads 23 reaches the plastic frame 24, the first reflective layer can reflect this light and reflect it into the optical film, thereby making rational use of this light, improving the light utilization rate, and further increasing the brightness of the display module 100.

[0059] Furthermore, it can be understood that, generally, an optical film group 27 is provided between the lamp board 22 and the display panel 1; after the light emitted by the lamp bead 23 passes through the optical film group 27, part of the light is reflected but can still be repeatedly refracted and reflected in the optical film group 27, but part of the light is directly reflected out of the optical film group 27 and reaches the wiring area 22b of the lamp board 22, and this part of the light is not utilized and is wasted; in one embodiment, the lamp board 22 is provided with a second reflective layer 26 on the side surface facing the display panel 1, and the second reflective layer 26 is located in the wiring area 22b; by providing the second reflective layer 26, the light reaching the wiring area 22b is reflected back into the optical film, so that this part of the light is reasonably utilized, thereby improving the utilization rate of the light and thereby improving the brightness of the display module 100.

[0060] The present application does not impose any specific restrictions on the material of the reflective coating. In one embodiment, the reflective coating is made of highly reflective ink and is produced on the light board 22 by silk screen printing.

[0061] It should be noted that the two embodiments of “providing the reflective slope 242 ” and “providing the second reflective layer 26 ” can be provided selectively or simultaneously; no specific limitation is imposed here.

[0062] Please refer again Figure 1 and Figure 2 The backlight module 2 also includes an optical film group 27, which is arranged between the light board 22 and the display panel 1. The optical film group 27 is in the accommodating cavity 213, and the side of the optical film group 27 is arranged opposite to the side of the plastic frame; the optical film group 27 includes an upper diffuser, an upper prism sheet, a lower prism sheet, a lower diffuser, a light guide plate and a reflective sheet stacked in sequence, and the upper diffuser is arranged close to the display panel 1.

[0063] It can be understood that the display panel 1 can be a liquid crystal display panel, and the display panel 1 includes an array substrate 11, a color filter substrate 12, a lower polarizer 14 and an upper polarizer 13; wherein the array substrate 11 and the color filter substrate 12 are arranged opposite to each other, the lower polarizer 14 is arranged on the side of the array substrate 11 away from the color filter substrate 12, and the upper polarizer 13 is arranged on the side of the color filter substrate 12 away from the array substrate 11; the backlight module 2 is arranged on the side of the lower polarizer 14 away from the array substrate 11; it should be noted that, as shown above, only the array substrate 11 and the color filter substrate 12 are shown separately, and these structural layers are just a brief description of some structures and components of the display panel 1, but are not limited to this: for example, the color filter substrate 12 includes a black matrix (BM), an RGB color resist layer, etc., and the array substrate 11 includes a TFT switch, a scan line, a data line, a pixel electrode, a common electrode, etc. The display panel 1 also includes various other display components, such as an alignment film, a liquid crystal layer, and a sealant between the array substrate 11 and the color filter substrate 12. These details can be implemented with reference to existing technologies and will not be repeated here.

[0064] Secondly, embodiments of the present application further provide a display device. The display device includes a display module 100. It should be noted that the display module 100 is configured as the display module 100 described above. That is, the display module 100 includes all embodiments of the display module 100 described above. The display device also includes all technical features of the display module 100 described above, as well as all beneficial effects brought about by the above technical features, which will not be detailed here.

[0065] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The above is a detailed introduction to a display module and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: The display module includes a display panel and a backlight module arranged on the back side of the display panel. The display panel has a display area and a frame area located outside the display area. The backlight module includes: bottom frame; and, A light board, the light board being arranged on a side of the bottom frame facing the display panel, the light board comprising a light-emitting area and a wiring area on one side of the light-emitting area, the wiring area being arranged corresponding to the position of the frame area, the light board being provided with a plurality of lamp beads arranged in an array at positions corresponding to the light-emitting area, and the light board being provided with connecting wiring at positions corresponding to the wiring area for electrically connecting each of the lamp beads to an external power supply; The plurality of lamp beads include an outermost edge lamp bead group, and at least the edge lamp bead group is arranged corresponding to the position of the border area; the backlight module also includes a plastic frame, which is arranged around the periphery of the light-emitting area, and the plastic frame includes four side edges, and the four side edges correspond to the four edges of the light-emitting area one by one, one of the side edges is arranged on the lamp board and in the wiring area, and the other three side edges are located outside the lamp board and arranged on the bottom frame; A surface of the plastic frame facing the display panel is used to support the display panel.

2. The display module according to claim 1, wherein: The multiple lamp beads also include a sub-edge lamp bead group arranged near the edge lamp bead group, and the sub-edge lamp bead group includes multiple sub-edge lamp beads arranged in a circle on the inner side of the edge lamp bead group, and each of the sub-edge lamp beads is at least partially arranged in a position corresponding to the border area.

3. The display module according to claim 1, wherein: The bottom frame includes a bottom plate and side plates, wherein the side plates extend along the circumference of the bottom plate and together with the bottom plate form a receiving cavity; The lamp board is located in the accommodating cavity and is arranged on the bottom plate; The plastic frame is located in the accommodating cavity, and any side edge of the plastic frame extends along the thickness direction of the light board, and any side edge of the plastic frame is arranged in parallel with the side panel on the corresponding side.

4. The display module according to claim 1, wherein: The four sides include a first side arranged on the routing area of ​​the light board, and the inner surface of the first side is provided with a reflective slope, which is inclined toward one side of the light board in the direction from the light board to the display panel.

5. The display module according to claim 4, wherein: The plane roughness of the reflecting inclined surface is set to 0.02-0.16; and / or, The angle between the reflecting inclined surface and the light board is set to θ, wherein 0°<θ<90°.

6. The display module according to claim 4, wherein: The reflective inclined surface is coated with a first reflective layer.

7. The display module according to claim 1, wherein: The light board is provided with a second reflective layer on a surface of a side facing the display panel, and the second reflective layer is located in the wiring area.

8. A display device, characterized in that: The display module comprises the display module according to any one of claims 1 to 7.

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