Backlight module and display device

Abstract

The utility model discloses a backlight module and a display device. The backlight module comprises a middle frame, a backlight source, a diffusion plate and a transparent supporting piece, and a containing cavity is formed in the middle frame; the backlight source is arranged in the accommodating cavity; the diffusion plate is arranged in the containing cavity and located on the light emitting side of the backlight source. The transparent supporting piece is arranged in the containing cavity, connected to the middle frame and located between the backlight source and the diffusion plate. The edge of the diffusion plate is in lap joint with the side, away from the backlight source, of the transparent supporting piece. The display effect can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a backlight module and a display device. Background Technology

[0002] In related technologies, in order to improve the fixing effect of the backlight module, the diffuser plate in the backlight module needs to be supported by the edge structure of the middle frame.

[0003] However, while the edge structure of the mid-frame supports the diffuser, it also blocks the light from the backlight shining on the edge pixels of the display panel. This causes the light emitted from the backlight to be unable to reach the edge pixels of the display panel, resulting in an optical phenomenon of peripheral shadows at the edges of the display panel, which reduces the display effect.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this application is to provide a backlight module and display device that can improve the display effect.

[0006] To solve the above problems, the technical solution of this application is as follows:

[0007] In a first aspect, this application proposes a backlight module, comprising:

[0008] A middle frame, wherein an accommodating cavity is formed inside the middle frame;

[0009] A backlight is disposed within the accommodating cavity;

[0010] A diffuser plate is disposed within the accommodating cavity and located on the light-emitting side of the backlight; and

[0011] A transparent support member is disposed within the accommodating cavity and connected to the middle frame; the transparent support member is located between the backlight and the diffuser plate.

[0012] The edge of the diffuser plate overlaps the side of the transparent support away from the backlight.

[0013] In one embodiment of this application, the transparent support member is detachably connected to the middle frame.

[0014] In one embodiment of this application, the transparent support member is provided with one of a buckle and a slot on the side near the middle frame, and the middle frame is provided with the other of the buckle and the slot on the side near the transparent support member. The transparent support member and the middle frame are connected by the buckle and the slot.

[0015] In one embodiment of this application, the buckle is provided on the side of the transparent support member near the middle frame;

[0016] The middle frame is provided with the slot on the side near the transparent support member, and the slot extends through the middle frame in a direction away from the receiving cavity;

[0017] At least a portion of the buckle passes through the slot.

[0018] In one embodiment of this application, the slot extends through the middle frame, and the slot includes a first recess and a second recess that are connected to each other, wherein the second recess is located on the side of the first recess away from the receiving cavity;

[0019] One part of the buckle is located in the first sinking groove, and the other part of the buckle is located in the second sinking groove, abutting against the inner wall of the second sinking groove near the receiving cavity.

[0020] In one embodiment of this application, the area of ​​the transparent support member on the side closer to the diffuser plate is larger than the area of ​​the transparent support member on the side farther from the diffuser plate.

[0021] In one embodiment of this application, the side of the transparent support member away from the middle frame is the light-incident surface, and the light-incident surface connects the side of the transparent support member close to the diffuser plate and the side of the transparent support member away from the diffuser plate;

[0022] Wherein, the angle between the light-incident surface and the thickness direction of the backlight module is greater than 0, the distance from the side of the light-incident surface away from the backlight source to the middle frame is a first distance, the distance from the side of the light-incident surface closer to the backlight source to the middle frame is a second distance, and the first distance is greater than the second distance.

[0023] In one embodiment of this application, the backlight module includes a plurality of transparent support members, which are spaced apart along a direction parallel to the plane where the backlight source is located.

[0024] The edge of the diffuser plate overlaps on the side of the plurality of transparent supports away from the backlight.

[0025] In one embodiment of this application, the middle frame includes:

[0026] The first side panel extends along the thickness direction of the backlight module, and the transparent support member is connected to the first side panel;

[0027] A first support plate is located around the backlight; and

[0028] The second support plate connects the first side plate and the first support plate. The second support plate, the first support plate, and the first side plate form the receiving cavity. The side of the second support plate near the receiving cavity abuts against the transparent support member.

[0029] In one embodiment of this application, the second support plate is provided with a limiting groove on the side near the accommodating cavity, and the transparent support member extends into the limiting groove on the side near the second support plate and abuts against the inner wall of the limiting groove.

[0030] In one embodiment of this application, the first support plate extends along the thickness direction of the backlight module;

[0031] The second support plate extends along a first direction, and the angle between the first direction and the thickness direction of the backlight module is in the range of 5 degrees to 85 degrees.

[0032] In one embodiment of this application, the transparent support extends along the first direction on the side of the second support plate;

[0033] The bottom wall of the limiting groove extends along the first direction;

[0034] The transparent support member abuts against the bottom wall of the limiting groove on the side closest to the second support plate.

[0035] In one embodiment of this application, the backlight module further includes a backplate;

[0036] The back panel includes a bottom panel and a second side panel, with the second side panel surrounding the edge of the bottom panel;

[0037] Wherein, the first side plate is located on the side of the second side plate away from the bottom plate;

[0038] The base plate is connected to the side of the first support plate away from the second support plate, and the backlight is provided on the base plate.

[0039] Secondly, this application proposes a display device including a backlight module, the backlight module including a mid-frame, a backlight source, a diffuser plate, and a transparent support member. A cavity is formed inside the mid-frame; the backlight source is disposed within the cavity; the diffuser plate is disposed within the cavity and located on the light-emitting side of the backlight source; the transparent support member is disposed within the cavity and connected to the mid-frame, the transparent support member being located between the backlight source and the diffuser plate; wherein the edge of the diffuser plate overlaps the side of the transparent support member away from the backlight source.

[0040] This application solves the problem in related technologies where the edge structure of the middle frame blocks the light from the backlight shining on the edge pixels of the display panel when the diffuser is supported by the edge structure of the middle frame. This reduces the optical phenomenon of peripheral shadows at the edges of the display panel and improves the display effect. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the backlight module and display panel in related technologies;

[0042] Figure 2 This is a schematic diagram of an embodiment of the display device of this application;

[0043] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0044] Figure 4 This is a schematic diagram of an embodiment of the backlight module of this application. Detailed Implementation

[0045] The terms used in this specification and claims have the meanings that are commonly understood by one of ordinary skill in the art to which this application pertains. The terms used in this specification and claims are for the purpose of facilitating the description and understanding of this application only, and are not intended to limit this application to the narrow interpretation of the specific terms used in the specification and claims.

[0046] Please see Figure 1 In related technologies, in order to improve the fixing effect of the backlight module 100a, the diffuser plate 30a in the backlight module 100a needs to be supported by the edge structure D of the middle frame 10a.

[0047] However, while supporting the diffuser plate 30a, the edge structure D of the middle frame 10a blocks the light emitted by the backlight 20a to the edge pixels of the display panel 200a. This causes the light emitted by the backlight 20a to be unable to reach the edge pixels of the display panel 200a, resulting in an optical phenomenon of peripheral shadows at the edges of the display panel 200a, which reduces the display effect.

[0048] Please see Figure 2 This application discloses a display device 1000. The display device 1000 can be a tablet computer, e-reader, electronic display screen, laptop computer, mobile phone, augmented reality (AR) / virtual reality (VR) device, media player, wearable device, digital camera, car navigation system, etc. The display device 1000 includes a backlight module 100 and a display panel 200.

[0049] Optionally, the display panel 200 is a liquid crystal display (LCD) panel 200.

[0050] The display panel 200 is located at the light-emitting side of the backlight module 100, and the backlight module 100 provides backlight for the display panel 200.

[0051] This application proposes a backlight module 100, including a mid-frame 10, a backlight source 20, a diffuser plate 30, and a transparent support member 40.

[0052] A cavity 11 is formed inside the middle frame 10. A backlight 20 is disposed within the cavity 11. A diffuser plate 30 is disposed within the cavity 11 and located on the light-emitting side of the backlight 20. A transparent support member 40 is disposed within the cavity 11 and connected to the middle frame 10. The transparent support member 40 is located between the backlight 20 and the diffuser plate 30. The edge of the diffuser plate 30 overlaps with the side of the transparent support member 40 away from the backlight 20.

[0053] In this embodiment, a transparent support member 40 is provided on the inner side of the middle frame 10 to support the diffuser plate 30. Since the transparent support member 40 does not block the light from passing through, it solves the problem in the related technology where the edge structure of the middle frame 10 is used to support the diffuser plate 30, and the edge structure blocks the light from the backlight 20 to the edge pixels of the display panel 200. This reduces the optical phenomenon of peripheral shadows appearing at the edge of the display panel 200 and improves the display effect.

[0054] Optionally, the display panel 200 is located on the side of the diffuser plate 30 away from the backlight 20. An optical film is also provided between the diffuser plate 30 and the display panel 200.

[0055] Please see Figure 3 Optionally, the transparent support 40 is detachably connected to the middle frame 10.

[0056] In this embodiment, the transparent support member 40 and the middle frame 10 can be locked and detachably connected by screws, bolts, nuts, etc. The transparent support member 40 and the middle frame 10 can also be detachably connected by mortise and tenon structure, or by buckle T1 structure. No limitation is made on the method of detachable connection.

[0057] Optionally, the transparent support member 40 is provided with one of the two clips T1 and the slot T2 on the side near the middle frame 10, and the middle frame 10 is provided with the other of the two clips T1 and the slot T2 on the side near the transparent support member 40. The transparent support member 40 and the middle frame 10 are connected by the clips T1 and the slot T2.

[0058] In this embodiment, since the transparent support 40 and the middle frame 10 are respectively provided with buckles T1 and slots T2, when installing the transparent support 40, the buckles T1 on the transparent support 40 and the middle frame 10 are aligned and snapped together, thereby fixing the transparent support 40 and the middle frame 10. There is no need to apply additional adhesive or glue, or use screws to fix the transparent support 40 and the middle frame 10, which improves the assembly efficiency of the transparent support 40 and the middle frame 10.

[0059] Optionally, the transparent support member 40 has a buckle T1 on the side near the middle frame 10. The middle frame 10 has a slot T2 on the side near the transparent support member 40. The slot T2 extends through the middle frame 10 in a direction away from the receiving cavity 11. At least a portion of the buckle T1 passes through the slot T2.

[0060] In this embodiment, since the transparent support member 40 and the middle frame 10 are respectively provided with a buckle T1 and a slot T2, when installing the transparent support member 40, the buckle T1 on the transparent support member 40 is aligned with the slot T2 on the middle frame 10, so that the buckle T1 and the slot T2 are engaged, thereby fixing the transparent support member 40 and the middle frame 10. There is no need to apply an additional adhesive layer or glue, or use screws to fix the transparent support member 40 and the middle frame 10, which improves the assembly efficiency of the transparent support member 40 and the middle frame 10.

[0061] Optionally, the buckle T1 and the transparent support 40 are integrally formed. In this embodiment, since the buckle T1 and the transparent support 40 are made of the same material, the buckle T1 can avoid blocking light, thus improving the display effect. At the same time, it also avoids the buckle T1, made of the same material as the middle frame 10, from blocking light due to its placement on the middle frame 10, thus improving the display effect.

[0062] Optionally, the slot T2 extends through the middle frame 10. The slot T2 includes a first recess T21 and a second recess T22 that are connected. The second recess T22 is located on the side of the first recess T21 away from the receiving cavity 11.

[0063] One part of the latch T1 is located in the first settling tank T21. The other part of the latch T1 is located in the second settling tank T22 and abuts against the inner wall of the second settling tank T22 near the receiving cavity 11.

[0064] In this embodiment, when installing the transparent support 40, the front end of the buckle T1 passes through the first recess T21 and reaches the second recess T22, abutting against the bottom wall of the second recess T22. Since the side walls of the second recess T22, except for the bottom wall, do not contact a portion of the buckle T1, a clearance structure is formed, which can prevent the buckle T1 from failing to engage with the recess T2 due to manufacturing tolerances, thus improving product yield. After the front end of the buckle T1 reaches the second recess T22, the rear end of the buckle T1 is located within the first recess T21.

[0065] Optionally, the area of ​​the transparent support 40 on the side closer to the diffuser plate 30 is larger than the area of ​​the transparent support 40 on the side farther away from the diffuser plate 30.

[0066] In this embodiment, the side of the transparent support member 40 near the diffuser plate 30 serves to support the diffuser plate 30. Therefore, the area of ​​the side of the transparent support member 40 near the diffuser plate 30 can be increased to enhance the support of the transparent support member 40 on the diffuser plate 30, thereby improving the stability of the internal structure of the backlight module 100.

[0067] Optionally, the transparent support 40 can be connected to the diffuser plate 30 via an adhesive layer on the side closest to the diffuser plate 30 to improve the connection stability between the transparent support 40 and the diffuser plate 30.

[0068] Optionally, the side of the transparent support member 40 away from the middle frame 10 is the light-incident surface 41, which connects the side of the transparent support member 40 near the diffuser plate 30 and the side of the transparent support member 40 away from the diffuser plate 30.

[0069] The angle between the light-incident surface 41 and the thickness direction Z of the backlight module 100 is greater than 0. The distance from the side of the light-incident surface 41 away from the backlight 20 to the middle frame 10 is the first distance L1, and the distance from the side of the light-incident surface 41 close to the backlight 20 to the middle frame 10 is the second distance L2. The first distance L1 is greater than the second distance L2.

[0070] In this embodiment, the light-incident surface 41 is tilted towards the direction of the backlight 20, which can increase the light incident on the edge pixels of the display panel 200, reduce the optical phenomenon of peripheral shadows appearing at the edges of the display panel 200, and improve the display effect. Since the first distance L1 is greater than the second distance L2, the area of ​​the transparent support 40 on the side closer to the diffuser plate 30 is greater than the area of ​​the transparent support 40 on the side farther away from the diffuser plate 30.

[0071] Please see Figure 4 Optionally, the backlight module 100 includes a plurality of transparent support members 40. The plurality of transparent support members 40 are spaced apart along a direction parallel to the plane of the backlight source 20. The edge of the diffuser plate 30 overlaps the side of the plurality of transparent support members 40 away from the backlight source 20.

[0072] In this embodiment, the design of multiple transparent support members 40 has two advantages. First, it eliminates the need for a large area of ​​transparent support members 40, reducing the support cost of the transparent support members 40. Second, multiple transparent support members 40 can improve the support effect on the diffuser plate 30, thereby improving the stability of the internal structure of the backlight module 100.

[0073] Please see Figure 2Optionally, the middle frame 10 includes a first side plate 12, a first support plate 13, and a second support plate 14.

[0074] The first side plate 12 extends along the thickness direction Z of the backlight module 100. A transparent support member 40 is connected to the first side plate 12. A first support plate 13 is located around the backlight 20. A second support plate 14 connects the first side plate 12 and the first support plate 13. The second support plate 14, the first support plate 13, and the first side plate 12 form a receiving cavity 11. The side of the second support plate 14 closest to the receiving cavity 11 abuts against the transparent support member 40.

[0075] In this embodiment, the first support plate 13 surrounds the backlight 20 and is used to support the second support plate 14 and the first side plate 12. The first side plate 12 is used to fix the transparent support member 40, and the second support plate 14 connects the first side plate 12 and the first support plate 13. The arrangement of the second support plate 14 will not block the light from the backlight 20 to the edge pixels of the display panel 200.

[0076] Please see Figure 2 Optionally, the backlight module 100 also includes a backplate 50.

[0077] The back panel 50 includes a bottom panel 51 and a second side panel 52. The second side panel 52 surrounds the edge of the bottom panel 51.

[0078] The first side plate 12 is located on the side of the second side plate 52 away from the bottom plate 51. The bottom plate 51 is connected to the first support plate 13 on the side away from the second support plate 14. A backlight 20 is provided on the bottom plate 51.

[0079] In this embodiment, the back plate 50 and the middle frame 10 form an accommodating cavity 11. The back plate 50 supports the backlight 20. The middle frame 10 and the back plate 50 can be connected by adhesive, screws, or clips T1. The connection method between the middle frame 10 and the back plate 50 is not limited here. The second side plate 52 can support the first side plate 12 and improve the stability of the internal structure of the backlight module 100.

[0080] Please see Figure 3 Optionally, the second support plate 14 is provided with a limiting groove 141 on the side near the receiving cavity 11. The transparent support member 40 extends into the limiting groove 141 on the side near the second support plate 14 and abuts against the inner wall of the limiting groove 141.

[0081] In this embodiment, the second support plate 14 also serves to support the bottom of the transparent support member 40. In the above embodiment, the transparent support member 40 is fixed to the first side plate 12 on one side only by the snap-fit ​​T1, which may result in unstable fixing. Therefore, in this embodiment, a limiting groove 141 is provided on the second support plate 14, and the bottom of the transparent support member 40 is inserted into the limiting groove 141 to support and limit the bottom of the transparent support member 40, thereby achieving a second fixation of the transparent support member 40 and improving the stability of the internal structure of the backlight module 100.

[0082] Optionally, the first support plate 13 extends along the thickness direction Z of the backlight module 100. The second support plate 14 extends along the first direction D1. The angle between the first direction D1 and the thickness direction Z of the backlight module 100 is within the range of 5 degrees to 85 degrees.

[0083] In this embodiment, the second support plate 14 is inclined, which can support the transparent support member 40 while not blocking the light from the backlight 20 to the edge pixels of the display panel 200, thereby improving the display effect.

[0084] Optionally, the angle between the first direction D1 and the thickness direction Z of the backlight module 100 can be one of the following values: 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, or 85 degrees. When the angle is greater than or equal to 20 degrees, the shadows of the edge pixels of the display panel 200 are significantly reduced, which can improve the display effect.

[0085] Optionally, the transparent support member 40 extends along the first direction D1 on the side near the second support plate 14. The bottom wall of the limiting groove 141 extends along the first direction D1. The side of the transparent support member 40 near the second support plate 14 abuts against the bottom wall of the limiting groove 141.

[0086] In this embodiment, to increase the contact area between the transparent support member 40 and the second support plate 14, the side of the transparent support member 40 closest to the second support plate 14 extends along the first direction D1. At this time, the side of the transparent support member 40 closest to the second support plate 14 is inclined, sharing the same extension direction as the second support plate 14. This increases the contact area between the transparent support member 40 and the second support plate 14, thereby improving the support effect of the second support plate 14 on the transparent support member 40. On the other hand, the bottom wall of the limiting groove 141 extends along the first direction D1, which also increases the contact area between the transparent support member 40 and the bottom wall of the limiting groove 141, thereby increasing the fixing effect of the second support plate 14 on the transparent support member 40 and improving the stability of the internal structure of the backlight module 100.

[0087] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A backlight module, characterized in that, include: A middle frame, wherein an accommodating cavity is formed inside the middle frame; A backlight is disposed within the accommodating cavity; A diffuser plate is disposed within the accommodating cavity and located on the light-emitting side of the backlight; and A transparent support member is disposed within the accommodating cavity and connected to the middle frame; the transparent support member is located between the backlight and the diffuser plate. The edge of the diffuser plate overlaps the side of the transparent support away from the backlight.

2. The backlight module as described in claim 1, characterized in that, The transparent support is detachably connected to the middle frame.

3. The backlight module as described in claim 1, characterized in that, The transparent support member has one of a buckle and a slot on the side near the middle frame, and the middle frame has the other of a buckle and a slot on the side near the transparent support member. The transparent support member and the middle frame are connected by the buckle and the slot.

4. The backlight module as described in claim 3, characterized in that, The transparent support member has the buckle on the side near the middle frame; The middle frame is provided with the slot on the side near the transparent support member, and the slot extends through the middle frame in a direction away from the receiving cavity; At least a portion of the buckle passes through the slot.

5. The backlight module as described in claim 4, characterized in that, The slot extends through the middle frame and includes a first recess and a second recess that are connected to each other. The second recess is located on the side of the first recess away from the receiving cavity. One part of the buckle is located in the first sinking groove, and the other part of the buckle is located in the second sinking groove, abutting against the inner wall of the second sinking groove near the receiving cavity.

6. The backlight module as described in claim 1, characterized in that, The area of ​​the transparent support member on the side closer to the diffuser plate is larger than the area of ​​the transparent support member on the side farther from the diffuser plate.

7. The backlight module as described in claim 6, characterized in that, The side of the transparent support member away from the middle frame is the light-incident surface, and the light-incident surface connects the side of the transparent support member close to the diffuser plate and the side of the transparent support member away from the diffuser plate; Wherein, the angle between the light-incident surface and the thickness direction of the backlight module is greater than 0, the distance from the side of the light-incident surface away from the backlight source to the middle frame is a first distance, the distance from the side of the light-incident surface closer to the backlight source to the middle frame is a second distance, and the first distance is greater than the second distance.

8. The backlight module as described in claim 1, characterized in that, The backlight module includes a plurality of transparent support members, which are spaced apart along a direction parallel to the plane where the backlight source is located. The edge of the diffuser plate overlaps on the side of the plurality of transparent supports away from the backlight.

9. The backlight module as described in any one of claims 1-8, characterized in that, The middle frame includes: The first side panel extends along the thickness direction of the backlight module, and the transparent support member is connected to the first side panel; A first support plate is located around the backlight; and The second support plate connects the first side plate and the first support plate. The second support plate, the first support plate, and the first side plate form the receiving cavity. The side of the second support plate near the receiving cavity abuts against the transparent support member.

10. The backlight module as described in claim 9, characterized in that, The second support plate has a limiting groove on the side near the accommodating cavity, and the transparent support member extends into the limiting groove on the side near the second support plate and abuts against the inner wall of the limiting groove.

11. The backlight module as described in claim 10, characterized in that, The first support plate extends along the thickness direction of the backlight module; The second support plate extends along a first direction, and the angle between the first direction and the thickness direction of the backlight module is in the range of 5 degrees to 85 degrees.

12. The backlight module as described in claim 11, characterized in that, The transparent support extends along the first direction on the side near the second support plate; The bottom wall of the limiting groove extends along the first direction; The transparent support member abuts against the bottom wall of the limiting groove on the side closest to the second support plate.

13. The backlight module as described in claim 9, characterized in that, The backlight module also includes a backplate; The back panel includes a bottom panel and a second side panel, with the second side panel surrounding the edge of the bottom panel; Wherein, the first side plate is located on the side of the second side plate away from the bottom plate; The base plate is connected to the side of the first support plate away from the second support plate, and the backlight is provided on the base plate.

14. A display device, characterized in that, include: The backlight module as described in any one of claims 1-13; and The display panel is located on the light-emitting side of the backlight module.

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