Backlight module, screen module and display equipment

Abstract

The utility model relates to a backlight module, a screen module and a display device, the backlight module comprises a light guide plate, a backlight source, a support and a first circuit board, the light guide plate comprises a first edge part and a second edge part which are connected and form an included angle, the backlight source is arranged on the first edge part, and the support comprises a first side and a second side which are opposite to each other; the light guide plate and the backlight source are arranged on the first side of the support, the first circuit board is provided with a first connecting part and a second connecting part which are connected, the first connecting part is fixedly connected with the first edge part and electrically connected with the backlight source, and at least part of the structure of the second connecting part is bent from one side of the second edge part to the second side of the support. The backlight source is arranged on the first edge part, and the first connecting part electrically connected with the backlight source is bent at the second edge part, so that the first circuit board can be led out from the second edge part, the first edge part of the bracket is prevented from being opened and led out, the interference between the first circuit board and the opening of the bracket is avoided, and the risk that the first circuit board is pulled and broken is reduced; and the problem of non-uniform brightness of the lamp socket of the backlight source is solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a backlight module, a screen module, and a display device. Background Art

[0002] Currently, in display devices, a backlight module is often required to provide backlight to realize the display function of the display device. The backlight module includes a backlight source and a light guide plate. The light guide plate plays the role of uniform light, thereby achieving better lighting effect.

[0003] However, the above-mentioned backlight module has problems such as the circuit board of the backlight source being easily broken and failing, and the brightness of the lamp socket being uneven, resulting in a poor user experience. Utility Model Content

[0004] To overcome the problems existing in the related art, the present disclosure provides a backlight module, a screen module and a display device.

[0005] According to a first aspect of the present disclosure, there is provided a backlight module, comprising:

[0006] A light guide plate, the light guide plate comprising a first side portion and a second side portion that are connected and arranged at an angle;

[0007] a backlight source, disposed on the first side;

[0008] a bracket, the bracket comprising a first side and a second side that are opposite to each other, the light guide plate and the backlight source being arranged on the first side of the bracket;

[0009] The first circuit board has a first connecting portion and a second connecting portion connected to each other, the first connecting portion is fixedly connected to the first edge portion, the first connecting portion is electrically connected to the backlight source, and at least a portion of the structure of the second connecting portion is bent from one side of the second edge portion to the second side of the bracket.

[0010] In a possible implementation manner, the first connecting portion extends along the first edge portion, and the second connecting portion is connected to one end of the first connecting portion.

[0011] In a possible implementation, the backlight module further includes a second circuit board, which is disposed on the second side of the bracket, and the portion of the second connecting portion bent to the second side of the bracket is electrically connected to the second circuit board.

[0012] In a possible embodiment, the second connecting portion includes a bending structure and a connecting structure connected to each other, one end of the bending structure is connected to the first connecting portion, the other end of the bending structure is located on the side of the first connecting portion away from the backlight source and is connected to one end of the connecting structure, the connecting structure extends from the other end of the bending structure toward the direction of the second circuit board, and the other end of the connecting structure is electrically connected to the second circuit board.

[0013] In a possible implementation, the first circuit board includes a flexible circuit board, and the second circuit board includes a printed circuit board.

[0014] In a possible embodiment, the bracket includes a substrate and a frame arranged around the substrate, the frame includes a first frame body arranged along the second edge, a through hole is provided on the first frame body, and the second connecting portion passes through the through hole and is bent to the second side of the bracket.

[0015] In a possible embodiment, the frame also includes a second frame body arranged along the first edge portion, the second frame body includes a first bending portion connected to the substrate and a second bending portion connected to the first bending portion, the second bending portion is arranged opposite to the light guide plate, and the backlight source is located between the second bending portion and the substrate.

[0016] In a possible implementation manner, a first reflective layer is provided on a surface of the second bent portion facing the light guide plate.

[0017] In a possible implementation, the backlight module further includes a second reflective layer, and the second reflective layer is disposed on a side of the light guide plate facing the bracket.

[0018] According to a second aspect of the present disclosure, a screen module is provided, comprising a display layer and the backlight module as described in the first aspect of the present disclosure, wherein the display layer is arranged on a side of the light guide plate facing away from the bracket.

[0019] In one possible embodiment, the display layer includes an optical film layer, a first polarizer layer, a second polarizer layer, a display film layer, and a display substrate. The optical film layer is disposed on the light guide plate of the backlight module, and the first polarizer layer is disposed on a side of the optical film layer away from the light guide plate.

[0020] The display film layer and the display substrate are arranged between the first polarizer layer and the second polarizer layer. The display film layer is arranged on a side of the first polarizer layer away from the optical film layer, and the display substrate is arranged on a side of the display film layer close to the second polarizer layer.

[0021] According to a third aspect of the present disclosure, a display device is provided, comprising the screen module according to the second aspect of the present disclosure.

[0022] In a possible implementation, the display device includes a tablet computer or a laptop computer.

[0023] In a possible implementation, the first side is a long side of the display device, and the second side is a short side of the display device.

[0024] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure sets the backlight source at the first edge, and bends the first connection part electrically connected to the backlight source at the second edge, so that the first circuit board can be connected from the second edge, avoiding the opening at the first edge of the bracket to connect the wires, thereby avoiding interference between the first circuit board and the bracket opening, reducing the risk of the first circuit board being pulled and broken, and improving the problem of uneven brightness of the backlight source lamp.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] Figure 1 It is a structural diagram of a backlight module in related technology.

[0028] Figure 2 It is a cross-sectional schematic diagram of a backlight module in a normal state in the related art.

[0029] Figure 3 It is a cross-sectional schematic diagram of a backlight module in the related art when the light guide plate shrinks.

[0030] Figure 4 is a schematic structural diagram of a backlight module according to an exemplary embodiment.

[0031] Figure 5 is a schematic cross-sectional view of a backlight module according to an exemplary embodiment.

[0032] Reference numerals:

[0033] 10. Light guide plate; 101. First edge; 102. Second edge; 103. Adhesive layer; 20. Backlight source; 30. Bracket; 300. Wire outlet opening; 301. First side; 302. Second side; 31. Substrate; 32. Frame; 321. Second frame; 3211. First bending portion; 3212. Second bending portion; 40. First circuit board; 41. First connecting portion; 42. Second connecting portion; 421. Bending structure; 422. Connecting structure; 43. Wire outlet position; 50. Second circuit board; 51. Connector; 61. First reflective layer; 62. Second reflective layer; 70. Display layer; 71. Optical film layer; 721. First polarizer layer; 722. Second polarizer layer; 73. Display film layer; 74. Display substrate; 75. Chip. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0035] In a display device, a backlight module is often required to provide backlight to realize the display function of the display device, such as Figure 1-Figure 3 As shown, the backlight module includes a backlight source 20' and a light guide plate 10'. The backlight source 20' is arranged at one end of the light guide plate 10'. The light guide plate 10' plays the role of uniform light, thereby achieving better lighting effect. A first circuit board 40' is arranged under the light guide plate 10'. The first circuit board 40' is electrically connected to the backlight source 20' for power supply. The backlight module also includes a bracket 30'. Part of the structure of the bracket 30' is arranged between the light guide plate 10' and the first circuit board 40', and part of the structure is bent to cover the backlight source 20'. A wire outlet opening 300' is opened on the bracket 30' for the first circuit board 40' to pass through and bend to the other side of the bracket 30'.

[0036] However, the above-mentioned backlight module has problems such as the circuit board of the backlight source is easy to break and fail, and the brightness of the lamp is uneven. To solve this problem, the inventors of this application found that the light guide plate 10' is prone to shrinkage under abnormal conditions such as high temperature and high humidity. Figure 1 As shown, the first circuit board 40' is connected to the bottom edge of the light guide plate 10'. Therefore, the shrinkage of the light guide plate 10' in the direction perpendicular to the bottom edge is particularly serious. Figure 3 As an example, the light guide plate 10' will Figure 3As shown in the figure, the right side shrinks. Since the first circuit board 40' electrically connected to the backlight source 20' is fixedly connected to the light guide plate 10', the shrinking light guide plate 10' will drive the first circuit board 40' to move to the right, causing interference and pulling between the wire outlet position 43' of the first circuit board 40' and the wire outlet opening 300' opened on the bracket 30', thereby increasing the risk of the first circuit board 40' breaking and failing. At the same time, it will also cause the bracket 30' and the first circuit board 40' to deform under the mutual pulling, thereby causing the backlight source 20' to tilt to the upper left to produce an elevation angle, resulting in uneven brightness of the lamp socket, resulting in a poor user experience.

[0037] In order to solve the above technical problems, the present disclosure provides a backlight module, a screen module and a display device. In the backlight module, the backlight source is arranged on the first edge, and the first connecting part electrically connected to the backlight source is bent at the second edge, so that the first circuit board can be connected from the second edge, avoiding the opening at the first edge position of the bracket to connect the wires, thereby avoiding interference between the first circuit board and the bracket opening, reducing the risk of the first circuit board being pulled and broken, and improving the problem of uneven brightness of the backlight source lamp.

[0038] According to an exemplary embodiment, Figure 4-Figure 5 As shown, the embodiments of the present disclosure provide a backlight module, which is used to provide backlight for a display device, supplying sufficient brightness and evenly distributed light sources so that it can display images normally. The backlight module includes a light guide plate 10, a backlight source 20, a bracket 30, and a first circuit board 40. The light guide plate 10 is used to guide and evenly distribute the light emitted by the backlight source 20. The bracket 30 protects and supports the backlight module. The first circuit board 40 is electrically connected to the backlight source 20 to supply power to the backlight source 20 through the first circuit board 40. Among them, the light guide plate 10 can be an optical-grade acrylic or PC (polycarbonate) plate, and the backlight source 20 can be an EL (ElectroLuminescence) light source, a CCFL (Cold Cathode Fluorescent Lamp) light source, an LED (light-emitting diode) light source, etc. The embodiment of the present disclosure uses the backlight source 20 as an LED light source as an example for explanation. It can be understood that those skilled in the art can also adjust and set the type of the backlight source 20 according to actual needs, and the embodiment of the present disclosure does not impose too many restrictions on this.

[0039] The light guide plate 10 includes a first side 101 and a second side 102 that are connected and arranged at an angle. The first side 101 and the second side 102 can be perpendicular or approximately perpendicular to each other. For example, the angle between the first side 101 and the second side 102 can be 75° to 105°. The backlight source 20 is arranged on the first side 101, and the first circuit board 40 is connected to the second side 102. The bracket 30 includes a first side 301 and a second side 302 that are separated from each other. The light guide plate 10 and the backlight source 20 are both arranged on the first side 301 of the bracket 30, that is, Figure 5 Taking the direction shown as an example, the light guide plate 10 and the backlight source 20 are both arranged above the bracket 30 .

[0040] The first circuit board 40 has a first connecting portion 41 and a second connecting portion 42 connected to each other, wherein the first connecting portion 41 is fixedly connected to the first edge portion 101 and electrically connected to the backlight source 20, and at least a portion of the second connecting portion 42 is bent from one side of the second edge portion 102 to the second side 302 of the bracket 30, that is, the first circuit board 40 is connected to the second edge portion 102. Figure 5 The horizontal direction shown in can be the short side of the backlight module and the display device. Since the light guide plate 10 shrinks in both length and width directions, and the length direction is usually used to fix with other components, the shrinkage in the width direction is greater. In the related art, the wire outlet position 43' is set at the first side 101, that is, the long side of the electronic device. When the light guide plate 10 shrinks, the first circuit board 40 will be driven to move a longer distance. The first circuit board 40 is easily pulled against the bracket 30. In the embodiment of the present disclosure, the wire outlet position 43 is set at the second side 102, which can effectively prevent the first circuit board 40 and the bracket 30 from being pulled and deformed, reduce the risk of the first circuit board 40 breaking, and improve the reliability of the backlight module. At the same time, it can also avoid the uneven brightness of the lamp socket caused by the backlight source 20 being pulled and tilted, thereby improving the user experience.

[0041] In the embodiment of the present disclosure, the backlight source is arranged at the first edge, and the first connecting portion electrically connected to the backlight source is bent at the second edge, so that the first circuit board can be connected from the second edge, avoiding the opening at the first edge of the bracket to connect the wires, thereby avoiding interference between the first circuit board and the bracket opening, reducing the risk of the first circuit board being pulled and broken, and improving the problem of uneven brightness of the backlight source lamp.

[0042] In some embodiments, the first connection portion 41 extends along the first side portion 101, and the second connection portion 42 is connected to one end of the first connection portion 41. Figure 4Taking the direction shown as an example, the first circuit board 40 includes a first connecting portion 41 and a second connecting portion 42. The first connecting portion 41 is connected to the second connecting portion 42. The second connecting portion 42 is arranged to the right of the first connecting portion 41 and extends from the right side of the light guide plate 10. The backlight module can be provided with multiple backlight sources 20. The multiple backlight sources 20 are evenly arranged along the extension direction of the first connecting portion 41 and are electrically connected to the first connecting portion 41.

[0043] In some embodiments, the backlight module further includes a second circuit board 50. Figure 4-Figure 5 As shown, the second circuit board 50 is disposed on the second side 302 of the bracket 30, the second connecting portion 42 is bent to the second side 302 of the bracket 30, and the portion of the second connecting portion 42 bent to the second side 302 of the bracket 30 is electrically connected to the second circuit board 50. The second circuit board 50 can be, for example, a main board of a display device.

[0044] In one example, the second connection portion 42 includes a bent structure 421 and a connecting structure 422. One end of the bent structure 421 is connected to the first connection portion 41, and the other end of the bent structure 421 is located on a side of the first connection portion 41 away from the backlight source 20 and is connected to one end of the connecting structure 422. The connecting structure 422 extends from the other end of the bent structure 421 toward the second circuit board 50 (i.e., Figure 5 The other end of the connecting structure 422 is electrically connected to the second circuit board 50, that is, the end of the connecting structure 422 away from the bending structure 421 is connected to the connector 51 provided on the second circuit board 50.

[0045] In one example, the first circuit board 40 includes an FPC (Flexible Printed Circuit), and the second circuit board 50 includes a PCB (Printed Circuit Board).

[0046] In some embodiments, the bracket 30 includes a base plate 31 and a frame 32 disposed around the base plate. Figure 5As shown, the frame 32 includes a first frame body (not shown in the figure) and a second frame body 321. The first frame body is arranged along the second edge 102. The first frame body is provided with a through hole (not shown in the figure) to allow the second connecting portion 42 to pass through. The second connecting portion 42 can pass through the through hole and bend to the second side 302 of the bracket 30. The second frame body 321 is arranged along the first edge 101. The second frame body 321 includes a first bending portion 3211 and a second bending portion 3212 connected to each other. The first bending portion 3211 is connected to the substrate 31, and the second bending portion 3212 is arranged opposite to the light guide plate 10. The backlight source 20 is located between the second bending portion 3212 and the substrate 31. The frame 32 can be formed by folding the substrate 31 upward in a U shape. The substrate 31 can support the backlight module and other screen structures, and the frame 32 can protect the internal structure of the backlight module.

[0047] In some embodiments, the backlight module further includes a first reflective layer 61 and a second reflective layer 62. Figure 5 As shown, the first reflective layer 61 is disposed on a surface of the second bent portion 3212 facing the light guide plate 10, and the second reflective layer 62 is disposed on a side of the light guide plate 10 facing the bracket 30. The first reflective layer 61 and the second reflective layer 62 are disposed on both sides of the light guide plate 10, respectively, to reflect light emitted by the backlight source 20, preventing the light from being absorbed or transmitted by the bracket 30, and reflecting the light back to the light guide plate 10, thereby improving light utilization.

[0048] In some embodiments, the light guide plate 10 is bonded to the first side 301 of the bracket 30 via an adhesive layer 103. The adhesive layer 103 may be made of an adhesive such as organic silicone, acrylic resin, unsaturated polyester, polyurethane, or epoxy resin. The present disclosure does not impose any restrictions on the specific material of the adhesive layer 103, and those skilled in the art may select the material as needed.

[0049] According to an exemplary embodiment, Figure 4-Figure 5As shown, an embodiment of the present disclosure provides a screen module, which includes a display layer 70 and a backlight module as described in the above embodiment. The display layer 70 is arranged on the side of the light guide plate 10 facing away from the bracket 30. The backlight module includes a light guide plate 10, a backlight source 20, a bracket 30, and a first circuit board 40. The light guide plate 10 includes a first edge portion 101 and a second edge portion 102 that are connected and arranged at an angle. The backlight source 20 is arranged on the first edge portion 101. The bracket 30 includes a first side 301 and a second side 302 that are opposite to each other. The light guide plate 10 and the backlight source 20 are both arranged on the first side 301 of the bracket 30. The first circuit board 40 has a first connecting portion 41 and a second connecting portion 42 that are connected, wherein the first connecting portion 41 is fixedly connected to the first edge portion 101 and electrically connected to the backlight source 20. At least a portion of the structure of the second connecting portion 42 is bent from one side of the second edge portion 102 to the second side 302 of the bracket 30.

[0050] In some embodiments, the display layer 70 includes an optical film layer 71, a first polarizer layer 721, a second polarizer layer 722, a display film layer 73, and a display substrate 74. The optical film layer 71 is disposed on the light guide plate 10 of the backlight module, the display film layer 73 and the display substrate 74 are disposed between the first polarizer layer 721 and the second polarizer layer 722. The first polarizer layer 721 is disposed on a side of the optical film layer 71 facing away from the light guide plate 10, the display film layer 73 is disposed on a side of the first polarizer layer 721 facing away from the optical film layer 71, and the display substrate 74 is disposed on a side of the display film layer 73 close to the second polarizer layer 722.

[0051] In one example, the optical film layer 71 may be a multi-layer structure. For example, the optical film layer 71 may include a stacked brightness enhancement film, a diffusion film, and a reflective film. Of course, it is understood that the different film layers of the optical film layer 71 may be made of the same or different materials. The specific functions of each film layer and the stacking order of each film layer may be configured by those skilled in the art according to actual needs, and the present disclosure does not impose any restrictions on this.

[0052] In one example, the display film layer 73 may include a TFT (Thin-Film-Transistor). Thin film transistors are widely used in the field of liquid crystal displays and can display image information at high speed, high brightness, and high contrast.

[0053] In one example, the display substrate 74 may include a CF (Color Filter), which is an important component of a liquid crystal display device and is used to provide color, adjust light, and protect the internal liquid crystal layer to achieve color display on the screen while having good optical performance, mechanical strength, and reliability.

[0054] In one example, the display layer 70 may further include a chip 75. The chip 75 may be a display chip for controlling the display function of the display layer 70. Of course, it is understood that the chip 75 may also be a chip with other functions, such as a heat dissipation chip, a current and voltage protection chip, etc. The present disclosure does not impose excessive restrictions on this, and those skilled in the art may configure it according to actual needs.

[0055] According to an exemplary embodiment, still referring to Figure 4-Figure 5 As shown, an embodiment of the present disclosure provides a display device, including the screen module described in the above embodiment. The display device can be, for example, an electronic device with display function, such as a tablet computer or a laptop computer. The screen module includes a display layer 70 and a backlight module. The display layer 70 is disposed on the side of the light guide plate 10 facing away from the bracket 30. The backlight module includes a light guide plate 10, a backlight source 20, a bracket 30, and a first circuit board 40. The light guide plate 10 includes a first edge 101 and a second edge 102 connected and arranged at an angle. The backlight source 20 is disposed on the first edge 101. The bracket 30 includes a first side 301 and a second side 302 that are opposite to each other. The light guide plate 10 and the backlight source 20 are disposed on the first side 301 of the bracket 30. The first circuit board 40 has a first connecting portion 41 and a second connecting portion 42 connected to each other. The first connecting portion 41 is fixedly connected to the first edge 101 and electrically connected to the backlight source 20. At least a portion of the second connecting portion 42 is bent from one side of the second edge 102 to the second side 302 of the bracket 30.

[0056] Among them, the first side 101 corresponds to the long side of the display device, and the second side 102 corresponds to the short side of the display device. Since the light guide plate 10 will shrink in both the length and width directions, and the length direction is usually used for fixing with other components, the shrinkage in the width direction is greater. In the related art, the outlet position 43' is set on the first side 101, that is, the long side of the display device. When the light guide plate 10 shrinks, it will drive the first circuit board 40 to move a long distance, and the first circuit board 40 is easily pulled against the bracket 30. However, in the embodiment of the present disclosure, the outlet position 43 is set on the second side 102, that is, on the short side of the display device. This can effectively prevent the first circuit board 40 and the bracket 30 from being pulled and deformed, reduce the risk of the first circuit board 40 breaking, improve the reliability of the backlight module, and at the same time avoid uneven brightness of the lamp socket caused by the backlight source 20 being pulled and tilted, thereby improving the user experience.

[0057] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the embodiments disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0058] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A backlight module, characterized in that: include: A light guide plate (10), comprising a first side portion (101) and a second side portion (102) connected to each other and arranged at an angle; a backlight source (20), arranged on the first side portion (101); a bracket (30), the bracket (30) comprising a first side (301) and a second side (302) that are separated from each other, the light guide plate (10) and the backlight source (20) being arranged on the first side (301) of the bracket (30); The first circuit board (40) has a first connecting portion (41) and a second connecting portion (42) connected to each other, wherein the first connecting portion (41) is fixedly connected to the first edge portion (101), the first connecting portion (41) is electrically connected to the backlight source (20), and at least a portion of the structure of the second connecting portion (42) is bent from one side of the second edge portion (102) to the second side (302) of the bracket (30).

2. The backlight module according to claim 1, wherein: The first connecting portion (41) extends along the first edge portion (101), and the second connecting portion (42) is connected to one end of the first connecting portion (41).

3. The backlight module according to claim 1, wherein: The backlight module further comprises a second circuit board (50), wherein the second circuit board (50) is arranged on the second side (302) of the bracket (30), and the portion of the second connecting portion (42) bent to the second side (302) of the bracket (30) is electrically connected to the second circuit board (50).

4. The backlight module according to claim 3, wherein: The second connecting portion (42) includes a bending structure (421) and a connecting structure (422) connected to each other, one end of the bending structure (421) is connected to the first connecting portion (41), the other end of the bending structure (421) is located on a side of the first connecting portion (41) away from the backlight source (20) and is connected to one end of the connecting structure (422), the connecting structure (422) extends from the other end of the bending structure (421) toward the second circuit board (50), and the other end of the connecting structure (422) is electrically connected to the second circuit board (50).

5. The backlight module according to claim 3, wherein: The first circuit board (40) comprises a flexible circuit board, and the second circuit board (50) comprises a printed circuit board.

6. The backlight module according to claim 1, wherein: The bracket (30) includes a substrate (31) and a frame (32) arranged around the substrate (31), the frame (32) includes a first frame body arranged along the second edge (102), a through hole is provided on the first frame body, and the second connecting portion (42) passes through the through hole and is bent to the second side (302) of the bracket (30).

7. The backlight module according to claim 6, wherein: The frame (32) further includes a second frame body (321) arranged along the first edge portion (101); the second frame body (321) includes a first bending portion (3211) connected to the substrate (31) and a second bending portion (3212) connected to the first bending portion (3211); the second bending portion (3212) is arranged opposite to the light guide plate (10); and the backlight source (20) is located between the second bending portion (3212) and the substrate (31).

8. The backlight module according to claim 7, wherein: A first reflective layer (61) is provided on a surface of the second bent portion (3212) facing the light guide plate (10).

9. The backlight module according to claim 1, wherein: The backlight module further comprises a second reflective layer (62), and the second reflective layer (62) is arranged on a side of the light guide plate (10) facing the bracket (30).

10. A screen module, characterized in that: It comprises a display layer (70) and the backlight module according to any one of claims 1 to 9, wherein the display layer (70) is arranged on a side of the light guide plate (10) facing away from the bracket (30).

11. The screen module according to claim 10, characterized in that: The display layer (70) comprises an optical film layer (71), a first polarizer layer (721), a second polarizer layer (722), a display film layer (73), and a display substrate (74); the optical film layer (71) is arranged on the light guide plate (10) of the backlight module; and the first polarizer layer (721) is arranged on a side of the optical film layer (71) that is away from the light guide plate (10); The display film layer (73) and the display substrate (74) are arranged between the first polarizer layer (721) and the second polarizer layer (722); the display film layer (73) is arranged on a side of the first polarizer layer (721) facing away from the optical film layer (71); and the display substrate (74) is arranged on a side of the display film layer (73) close to the second polarizer layer (722).

12. A display device, characterized in that: Comprising the screen module according to claim 10 or 11.

13. The display device according to claim 12, wherein: The display device includes a tablet computer or a notebook computer.

14. The display device according to claim 12, wherein: The first side (101) is a long side of the display device, and the second side (102) is a short side of the display device.

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