Backlight module and display device

Abstract

A backlight module (100) and a display device. The backlight module (100) comprises a back plate (110), a lamp panel (120) and a plastic frame (140), wherein the back plate (110) is provided with an accommodating recess; the lamp panel (120) is arranged in the accommodating recess; at least one first light-emitting unit (121) is provided in a middle area (101) of the lamp panel (120); a plurality of second light-emitting units (122) surrounding the first light-emitting unit (121) are provided in a peripheral area (102); the plastic frame (140) is arranged in the accommodating recess and surrounds the lamp panel (110), and comprises a first sub-portion (141) and a second sub-portion (142) connected to the first sub-portion (141); the first sub-portion (141) is arranged on a side surface of the lamp panel (120) and is located between the lamp panel (120) and a side wall of the back plate (110); the second sub-portion (142) is arranged on the side of the lamp panel (120) that is away from the back plate (110); and the orthographic projection of the second sub-portion (142) on the back plate (110) covers the orthographic projections of at least some of the second light-emitting units (122) on the back plate (110). The backlight module (110) and the display device can solve the problem of edge blackening.

Description

Backlight module and display device

[0001] This application claims priority to Chinese patent application No. 202311645198.4 filed on December 1, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0003] In the light-emitting diode (LED) backlight module structure, LEDs are arranged in a rectangular array, and the LED light-emitting angle is relatively large (usually greater than 120°). As shown in Figures 1 and 2, there is an energy difference between the LEDs located in the edge area (2 in the figure) and the LEDs located in the middle area (1 in the figure). That is, in addition to emitting its own light, the LEDs in the middle area also receive energy compensation provided by the surrounding LED light (as shown in Figure 1); while the LEDs in the edge area can only receive energy compensation provided by LED light in a single direction (as shown in Figure 2). SUMMARY OF THE INVENTION

[0004] The difference in LED energy will cause the edge area to be lower in brightness than the middle area, resulting in an edge blackening effect.

[0005] Therefore, it is necessary to provide a backlight module and a display device to improve this defect.

[0006] The present application provides a backlight module and a display device to solve the problem of edge blackening in LED backlight modules.

[0007] The present application provides a backlight module, comprising:

[0008] The back plate has a receiving groove;

[0009] a light board disposed in the receiving groove, the light board comprising a middle area and an edge area surrounding the middle area, the middle area being provided with at least one first light-emitting unit, the edge area being provided with a plurality of second light-emitting units, and the second light-emitting units being arranged around the first light-emitting units;

[0010] A plastic frame is arranged in the receiving groove and surrounds the light board;

[0011] In which, the plastic frame includes a first sub-section and a second sub-section connected to the first sub-section, the first sub-section is arranged on the side of the light board and is located between the light board and the side wall of the back panel, the second sub-section is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-section on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel.

[0012] The present application further provides a display device, comprising a backlight module and a display panel located on the backlight module, wherein the backlight module comprises:

[0013] The back plate has a receiving groove;

[0014] a light board disposed in the receiving groove, the light board comprising a middle area and an edge area surrounding the middle area, the middle area being provided with at least one first light-emitting unit, the edge area being provided with a plurality of second light-emitting units, and the second light-emitting units being arranged around the first light-emitting units;

[0015] A plastic frame is arranged in the receiving groove and surrounds the light board;

[0016] In which, the plastic frame includes a first sub-section and a second sub-section connected to the first sub-section, the first sub-section is arranged on the side of the light board and is located between the light board and the side wall of the back panel, the second sub-section is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-section on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below only disclose some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] FIG1 is a schematic diagram of a middle area LED receiving light of a backlight module provided by the present application;

[0019] FIG2 is a schematic diagram of light received by LEDs in an edge area of ​​a backlight module provided by the present application;

[0020] FIG3 is a schematic cross-sectional view of a backlight module according to an embodiment of the present application;

[0021] FIG4 is a schematic cross-sectional view of a backlight module according to an embodiment of the present application;

[0022] FIG5 is a schematic top view of a backlight module provided in an embodiment of the present application;

[0023] FIG6 is a schematic cross-sectional view of a backlight module according to an embodiment of the present application;

[0024] FIG. 7 is a view A of a back plate of a backlight module provided in the embodiment of FIG. 6 . Modes for Carrying Out the Invention

[0025] 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.

[0026] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] The present application may repeat reference numerals and / or reference letters in different embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0028] The present application provides a backlight module, comprising:

[0029] The back plate has a receiving groove;

[0030] a light board disposed in the receiving groove, the light board comprising a middle area and an edge area surrounding the middle area, the middle area being provided with at least one first light-emitting unit, the edge area being provided with a plurality of second light-emitting units, and the second light-emitting units being arranged around the first light-emitting units;

[0031] A plastic frame is arranged in the receiving groove and surrounds the light board;

[0032] In which, the plastic frame includes a first sub-section and a second sub-section connected to the first sub-section, the first sub-section is arranged on the side of the light board and is located between the light board and the side wall of the back panel, the second sub-section is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-section on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel.

[0033] In one embodiment, in a direction perpendicular to the light board, a vertical distance between the second light emitting unit and the second sub-section is h, and 0 mm<h≤0.5 mm.

[0034] In one embodiment, the color of the plastic frame is white or off-white.

[0035] In one embodiment, a side of the second sub-section close to the first light emitting unit is provided with an inclined section, and the section is inclined from the side of the second sub-section close to the first light emitting unit toward the side of the second sub-section close to the first sub-section.

[0036] In one embodiment, the angle between the cut surface and the plane where the side of the second sub-portion close to the light board is located is α, and 20°≤α≤70°.

[0037] In one embodiment, the light board includes a plurality of first light-emitting units and a plurality of second light-emitting units arranged in an array, and a distance between adjacent first light-emitting units and second light-emitting units is smaller than a distance between two adjacent second light-emitting units.

[0038] In one embodiment, the light board further includes a reflective layer, and the reflective layer is disposed between adjacent first light-emitting units, adjacent second light-emitting units, and between adjacent first light-emitting units and second light-emitting units.

[0039] In one embodiment, at least one fixing hole is provided on the back plate, and a protrusion matching the fixing hole is provided on a side of the first sub-portion of the plastic frame close to the back plate, and the protrusion is snapped into the fixing hole.

[0040] In one embodiment, the plastic frame and the back plate are connected and fixed by adhesive.

[0041] The present application also provides a display device, comprising the backlight module as described above, and a display panel located on the backlight module.

[0042] The present application provides a backlight module and a display device, wherein the display module includes a plastic frame, the plastic frame includes a first sub-section and a second sub-section connected to the first sub-section, the second sub-section is arranged on a side of the light panel away from the back panel, and the orthographic projection of the second sub-section on the back panel covers at least a portion of the orthographic projection of the second light-emitting unit on the back panel. The first light-emitting unit located at the edge is compensated for light by the second light-emitting unit located below the second sub-section of the plastic frame, and the second sub-section is used to reflect the light emitted by the second light-emitting unit to further increase the brightness of the edge of the backlight module, thereby avoiding the problem of blackening of the edge.

[0043] As shown in Figures 3 to 6, the present application provides a backlight module 100, comprising: a back panel 110 having a receiving groove; a light panel 120 disposed in the receiving groove, the light panel 120 comprising a middle area 101 and an edge area 102 surrounding the middle area 101, the middle area 101 being provided with at least one first light-emitting unit 121, the edge area 102 being provided with multiple second light-emitting units 122, and the second light-emitting units 122 being provided around the first light-emitting units 121; a plastic frame 140 disposed in the receiving groove, And it is arranged around the lamp board 120; wherein, the plastic frame 140 includes a first sub-portion 141 and a second sub-portion 142 connected to the first sub-portion 141, the first sub-portion 141 is arranged on the side of the lamp board 120, and is located between the side wall of the lamp board 120 and the back panel 110, the second sub-portion 142 is arranged on the side of the light board 120 away from the back panel 110, and the orthographic projection of the second sub-portion 142 on the back panel 110 covers at least part of the orthographic projection of the second light-emitting unit 122 on the back panel 110.

[0044] In the present application, the second sub-portion 142 of the plastic frame 140 covers at least part of the second light-emitting unit 122 located in the edge area 102, so that the second light-emitting unit 122 is located below the second sub-portion 142, and the second light-emitting unit 122 is used to compensate the light of the first light-emitting unit 121 located at the edge. At the same time, the second sub-portion 142 is used to reflect the light emitted by the second light-emitting unit 122 to further increase the brightness of the edge of the backlight module, thereby avoiding the problem of blackening of the edge.

[0045] Specifically, as shown in FIG3 , which is a schematic cross-sectional structural diagram of a backlight module 100 provided in an embodiment of the present application, the backlight module 100 includes a back plate 110 , a light board 120 , an optical film layer 130 and a plastic frame 140 .

[0046] The back plate 110 has a receiving groove, which is used to accommodate components such as the light board 120 and the optical film layer 130, so as to provide support and protection for the components such as the light board 120 and the optical film layer 130.

[0047] In some embodiments, the back plate 110 includes a bottom plate and side plates connected to the bottom plate, and the side plates can be arranged around the edge of the bottom plate. The material of the back plate 110 can be metal, for example, the back plate 110 can be an iron frame.

[0048] The light board 120 is arranged on the side of the bottom plate facing the receiving groove. The light board 120 includes a substrate 123, light-emitting units arranged in an array on the substrate 123, and an encapsulation layer 124 covering the light-emitting units on the substrate 123. The encapsulation layer 124 can be an encapsulation glue for protecting the light-emitting units. The light-emitting units can be LEDs, Mini-LEDs, Micro LEDs, etc., and can emit blue light, red light, green light, or white light. A driving circuit is provided on the substrate 123, and the driving circuit is electrically connected to the light-emitting units to drive the light-emitting units to emit light. As shown in Figure 5, the light board 120 includes a middle area 101 and an edge area 102 surrounding the middle area 101. The middle area 101 is provided with a plurality of first light-emitting units 121 arranged in an array, and the edge area 102 is provided with a plurality of second light-emitting units 122. The plurality of second light-emitting units 122 are evenly distributed around the plurality of first light-emitting units 121. The middle area 101 corresponds to the display area of ​​the backlight module 100 , and the edge area 102 corresponds to the non-display area of ​​the backlight module 100 .

[0049] In some embodiments, the light panel 120 further includes a reflective layer 125. The reflective layer 125 is disposed between adjacent first light-emitting units 121, adjacent second light-emitting units 122, and adjacent first light-emitting units 121 and second light-emitting units 122, that is, the reflective layer 125 is disposed between the gaps between the light-emitting units. The reflective layer 125 is configured to reflect light from the first light-emitting units 121 and the second light-emitting units 122, thereby increasing light extraction efficiency and light utilization, thereby improving display quality. The reflective layer 125 may be, but is not limited to, white oil.

[0050] The optical film layer 130 is disposed on a side of the light panel 120 away from the base plate. The orthographic projection of the optical film layer 130 on the base plate at least covers the orthographic projection of the middle region 101 on the base plate. The optical film layer 130 is used to adjust the light emitted by the light-emitting unit to improve the light uniformity and light extraction efficiency of the backlight module 100. The optical film layer 130 may include multiple stacked film layers, each of which may include at least one of a reflective film, a diffusion film, a brightness enhancement film, a quantum dot film, a spectroscopic film, and the like. For example, as shown in FIG3 , the optical film layer 130 may include a first prismatic film 131, a red-green reflecting film 132, a quantum dot film 133, a second prismatic film 134, and a third prismatic film 135, which are stacked in sequence. The first prismatic film 131 and the red-green reflecting film 132 cover the middle region 101 and the edge region 102, and the quantum dot film 133, the second prismatic film 134, and the third prismatic film 135 cover the middle region 101. It should be noted that the functions of the various film layers of the optical film layer 130 and the stacking order of the film layers can be set according to the actual process requirements of the backlight module 100 and are not specifically limited here.

[0051] The plastic frame 140 is disposed around the light board 120 and the optical film layer 130 and is located within the receiving groove. The plastic frame 140 includes a first sub-portion 141 and a second sub-portion 142 connected to the first sub-portion 141. The first sub-portion 141 is disposed on the side of the light board 120 and is located between the light board 120 and the side panel. The second sub-portion 142 is disposed on a side of the light board 120 away from the back panel 110. The orthographic projection of the second sub-portion 142 on the back panel 110 covers at least a portion of the orthographic projection of the second light-emitting unit 122 on the back panel 110, that is, the second sub-portion 142 covers a portion of the second light-emitting unit 122 or completely covers the second light-emitting unit 122. The second sub-section 142 covers the second light-emitting unit 122 located in the edge region 102 and is positioned below the second sub-section 142. In this case, the first light-emitting unit 121 adjacent to the second light-emitting unit 122 corresponds to the edge light-emitting unit corresponding to the backlight module display area. Because the first light-emitting unit 121 is surrounded by light-emitting units, the energy difference between the first light-emitting unit 121 and the other first light-emitting units 121 in the middle region 101 is not significant. Furthermore, a certain distance exists between the second sub-section 142 and the second light-emitting unit 122. Specifically, in a direction perpendicular to the light panel 120, a vertical distance h exists between the second light-emitting unit 122 and the second sub-section 142, with 0 mm < h ≤ 0.5 mm. Part of the light emitted by the second light-emitting unit 122 hits the surface of the second sub-portion 142 on the side facing the light board 120, is then reflected by the surface of the second sub-portion 142 onto the substrate 123 or the reflective layer 125, is then reflected again by the surface of the substrate 123 or the reflective layer 125, and is emitted from the gap between the second light-emitting unit 122 and the adjacent first light-emitting unit 121. In this embodiment, part of the light emitted by the second light-emitting unit 122 hits the adjacent first light-emitting unit 121 to compensate for the energy of the first light-emitting unit 121, and another part of the light is reflected by the second sub-portion 142 and the substrate 123 or the reflective layer 125, and is emitted from the gap between the second light-emitting unit 122 and the adjacent first light-emitting unit 121. This can further increase the amount of light emitted from the edge, improve the edge brightness, and thus avoid the problem of blackening the edge.

[0052] In some embodiments, the first sub-portion 141 and the second sub-portion 142 can be an integral structure. For example, the first sub-portion 141 and the second sub-portion 142 can be an inverted "L"-shaped structure, the first sub-portion 141 is a vertical portion, and the second sub-portion 142 is a horizontal extension portion, the horizontal extension portion is located above the second light-emitting unit 122, and the orthographic projection of the horizontal extension portion on the bottom plate covers the orthographic projection of the second light-emitting unit 122 on the bottom plate.

[0053] The backlight module 100 further includes a light-shielding layer 150, which is disposed on the plastic frame 140 and the optical film layer 130. The orthographic projection of the light-shielding layer 150 on the back panel 110 covers the orthographic projection of the plastic frame 140 on the back panel 110 and the gap between the plastic frame 140 and the optical film layer 130, thereby preventing light leakage from the edge area of ​​the backlight module 100. The light-shielding layer 150 may be, but is not limited to, a light-shielding tape.

[0054] In one embodiment, the color of the plastic frame 140 is white or off-white. The material of the plastic frame 140 can be polycarbonate (PC). The color of the plastic frame 140 can be changed by adding additives to the PC material. Since the closer the color of the plastic frame 140 is to white, the better the light reflection effect is, the white or off-white plastic frame 140 is used in this embodiment to increase the reflectivity of the second light-emitting unit 122, so that more light is reflected above the first light-emitting unit 121 adjacent to the second light-emitting unit 122. This can further increase the amount of light emitted from the edge and improve the edge brightness, thereby avoiding the problem of edge blackening.

[0055] In some other embodiments, the plastic frame 140 may also be other colors, which is not limited here.

[0056] In one embodiment, a reflective coating or a reflective film layer may be provided on a side surface of the second sub-portion 142 close to the light board 120 to improve the reflectivity of the side surface of the second sub-portion 142 close to the light board 120 to the light emitted by the second light-emitting unit 122, so as to further improve the brightness of the edge.

[0057] In one embodiment, as shown in Figure 4, an inclined cut surface 1421 is provided on the side of the second sub-portion 142 close to the light board 120, and the cut surface 1421 is inclined from the side of the second sub-portion 142 close to the optical film layer 130 toward the side of the second sub-portion 142 close to the first sub-portion 141, so that more light can be emitted from between the cut surface 1421 and the light board 120, reducing the obstruction of the second sub-portion 142 to the outgoing light or reflected light of the second light-emitting unit 122, further increasing the light output at the edge, and improving the edge brightness.

[0058] In some embodiments, the angle between the cut surface 1421 and the plane of the side of the second sub-portion 142 close to the light board 120 is α, and 20°≤α≤70°.

[0059] Specifically, a wedge-shaped cut can be made on the side of the second sub-portion 142 close to the first light-emitting unit 121 to form the inclined cut surface 1421. The space formed after the cut can be used for the light of the second light-emitting unit 122 to emit, which can increase the amount of light emitted.

[0060] In one embodiment, the light board 120 includes a plurality of first light emitting units 121 and a plurality of second light emitting units 122 arranged in an array, and the distance between adjacent first light emitting units 121 and second light emitting units 122 is smaller than the distance between two adjacent second light emitting units 122 .

[0061] Specifically, as shown in FIG5 , in the middle region 101, the first light-emitting units 121 may be arranged in an array with equal spacing, and in the edge region 102, adjacent second light-emitting units 122 may be arranged with equal spacing, and the spacing d between a second light-emitting unit 122 and an adjacent first light-emitting unit 121 is less than the spacing D between two adjacent first light-emitting units 121. Because the second light-emitting unit 122 is blocked by the plastic frame 140 above, its energy loss is greater than that of the first light-emitting unit 121 located in the middle region 101. Therefore, d<D, which can reduce the light loss of the second light-emitting unit 122, thereby providing more energy compensation for the first light-emitting unit 121 adjacent to the second light-emitting unit 122, thereby ensuring energy uniformity among the first light-emitting units 121 in the middle region 101 and improving the edge blackening phenomenon.

[0062] In one embodiment, at least one fixing hole 111 is provided on the back plate 110, and a protrusion 1411 matching the fixing hole 111 is provided on the side of the first sub-portion 141 of the plastic frame 140 close to the back plate 110, and the protrusion 1411 is snapped into the fixing hole 111 to fix the plastic frame 140 to the back plate 110.

[0063] Specifically, as shown in Figures 6 and 7, an "L"-shaped notch is provided at the junction of the side panel and the bottom panel of the back panel 110 as the fixing hole 111, and a raised snap-fit ​​structure is formed at the position of the first sub-portion 141 of the rubber frame 140 corresponding to the notch, and the snap-fit ​​structure is snap-connected to the notch to firmly fix the rubber frame 140 to the back panel 110.

[0064] In one embodiment, as shown in FIG3 , the plastic frame 140 and the back panel 110 are connected and fixed by an adhesive. For example, a double-sided tape 160 may be provided between the side panel of the back panel 110 and the plastic frame 140 , and the plastic frame 140 and the back panel 110 are fixed by the double-sided tape 160 .

[0065] The present application further provides a display device, comprising the backlight module 100 as described above, and a display panel located on the backlight module 100 , wherein the display panel is arranged on a light emitting surface of the backlight module 100 .

[0066] In summary, the present application provides a backlight module and a display device, wherein the display module includes a plastic frame, the plastic frame includes a first sub-section and a second sub-section connected to the first sub-section, the second sub-section is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-section on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel. The first light-emitting unit located at the edge is compensated for light by the second light-emitting unit located below the second sub-section of the plastic frame, and the second sub-section is used to reflect the light emitted by the second light-emitting unit to further increase the brightness of the edge of the backlight module, thereby avoiding the problem of blackening of the edge.

[0067] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A backlight module, comprising: A back plate having a receiving groove; A light board is arranged in the receiving groove, the light board comprises a middle area and an edge area surrounding the middle area, the middle area is provided with at least one first light emitting unit, the edge area is provided with a plurality of second light emitting units, and the second light emitting units are arranged around the first light emitting units; A plastic frame is arranged in the receiving groove and around the light panel; Among them, the plastic frame includes a first sub-part and a second sub-part connected to the first sub-part, the first sub-part is arranged on the side of the light board and is located between the light board and the side wall of the back panel, the second sub-part is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-part on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel.

2. The backlight module according to claim 1, wherein: In a direction perpendicular to the light board, a vertical distance between the second light emitting unit and the second sub-portion is h, and 0 mm<h≤0.5 mm.

3. The backlight module according to claim 1, wherein: The color of the rubber frame is white or off-white.

4. The backlight module according to claim 1, wherein: An inclined cut surface is disposed on a side of the second sub-portion close to the first light-emitting unit, and the cut surface is inclined from the side of the second sub-portion close to the first light-emitting unit toward the side of the second sub-portion close to the first sub-portion.

5. The backlight module according to claim 4, wherein: The included angle between the cut surface and the plane where the side of the second sub-portion close to the light board is located is α, and 20°≤α≤70°.

6. The backlight module according to claim 1, wherein: The light board includes a plurality of the first light emitting units and a plurality of the second light emitting units arranged in an array, and a distance between adjacent first light emitting units and second light emitting units is smaller than a distance between two adjacent second light emitting units.

7. The backlight module according to claim 1, wherein: The light board further includes a reflective layer, and the reflective layer is disposed between adjacent first light emitting units, adjacent second light emitting units, and between adjacent first light emitting units and second light emitting units.

8. The backlight module according to claim 1, wherein: At least one fixing hole is arranged on the back plate, and a protrusion matching with the fixing hole is arranged on one side of the first sub-part of the plastic frame close to the back plate, and the protrusion is clamped in the fixing hole.

9. The backlight module according to claim 1, wherein: The adhesive frame and the back plate are connected and fixed by adhesive.

10. A display device, comprising a backlight module and a display panel located on the backlight module, wherein the backlight module comprises: A back plate having a receiving groove; A light board is arranged in the receiving groove, the light board comprises a middle area and an edge area surrounding the middle area, the middle area is provided with at least one first light emitting unit, the edge area is provided with a plurality of second light emitting units, and the second light emitting units are arranged around the first light emitting units; A plastic frame is arranged in the receiving groove and around the light panel; Among them, the plastic frame includes a first sub-part and a second sub-part connected to the first sub-part, the first sub-part is arranged on the side of the light board and is located between the light board and the side wall of the back panel, the second sub-part is arranged on the side of the light board away from the back panel, and the orthographic projection of the second sub-part on the back panel covers at least part of the orthographic projection of the second light-emitting unit on the back panel.

11. The display device according to claim 10, wherein: In a direction perpendicular to the light board, a vertical distance between the second light emitting unit and the second sub-portion is h, and 0 mm<h≤0.5 mm.

12. The display device according to claim 10, wherein: The color of the rubber frame is white or off-white.

13. The display device according to claim 10, wherein: An inclined cut surface is disposed on a side of the second sub-portion close to the first light-emitting unit, and the cut surface is inclined from the side of the second sub-portion close to the first light-emitting unit toward the side of the second sub-portion close to the first sub-portion.

14. The display device according to claim 13, wherein: The included angle between the cut surface and the plane where the side of the second sub-portion close to the light board is located is α, and 20°≤α≤70°.

15. The display device according to claim 10, wherein: The light board includes a plurality of the first light emitting units and a plurality of the second light emitting units arranged in an array, and a distance between adjacent first light emitting units and second light emitting units is smaller than a distance between two adjacent second light emitting units.

16. The display device according to claim 10, wherein: The light board further includes a reflective layer, and the reflective layer is disposed between adjacent first light emitting units, adjacent second light emitting units, and between adjacent first light emitting units and second light emitting units.

17. The display device according to claim 10, wherein: At least one fixing hole is arranged on the back plate, and a protrusion matching with the fixing hole is arranged on one side of the first sub-part of the plastic frame close to the back plate, and the protrusion is clamped in the fixing hole.

18. The display device according to claim 10, wherein: The adhesive frame and the back plate are connected and fixed by adhesive.

19. The display device according to claim 10, wherein: The back plate includes a bottom plate and a side plate connected to the bottom plate. The side plate can be arranged around the edge of the bottom plate. The lamp panel is arranged on a side of the bottom plate facing the receiving groove.

20. The display device according to claim 19, wherein: The backlight module also includes an optical film layer and a shading layer. The optical film layer is arranged on a side of the light board away from the bottom plate, and the shading layer is arranged on the glue frame and the optical film layer. The orthographic projection of the shading layer on the back plate covers the orthographic projection of the glue frame on the back plate and the gap between the glue frame and the optical film layer.

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