Backlight module and display device

Abstract

The utility model discloses a backlight module and a display device, the display device comprises a flexible circuit board and a thin film transistor array substrate, the display device further comprises the backlight module, the backlight module comprises a back plate, a pair of supporting pieces, a printed circuit board and a clamping piece, and the back plate comprises a bottom plate and a side plate connected with the bottom plate; wherein one supporting piece is arranged at one end of the side plate, and the other supporting piece is arranged at the other end of the side plate. The printed circuit board is fixed with the supporting piece, and the thin film transistor array substrate is connected with the printed circuit board through the flexible circuit board; and the clamping piece is connected with the side plate, the clamping piece is located between the two supporting pieces, and the clamping piece clamps a part of the printed circuit board.

Description

Technical Field

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

[0002] refer to Figure 1-Figure 3 The traditional solution for installing the backplane, printed circuit board and thin film transistor array substrate of the display device is as follows: holes are set at both ends of the bottom plate of the backplane of the backlight module, and a part of the backplane facing the holes is bent to the outside of the backplane, so that the two ends of the side plate of the backplane form folded ears, and then the two ends of the printed circuit board are fixed, and the printed circuit board is connected to the thin film transistor array substrate through a flexible circuit board. When the display device is subjected to the opening and closing test and the twisting test, the printed circuit board will be squeezed by the external force. Since the middle position of the printed circuit board is not fixed, the middle position of the printed circuit board is easily deformed, resulting in the distortion of the flexible circuit board, which causes the problem of poor noise in the display device. Utility Model Content

[0003] The embodiments of the present application provide a backlight module and a display device to improve the problem of poor noise in the display device.

[0004] In a first aspect, an embodiment of the present application provides a backlight module, comprising:

[0005] A back plate, the back plate comprising a bottom plate and a side plate connected to the bottom plate;

[0006] A pair of support members, wherein one of the support members is disposed at one end of the side plate, and the other support member is disposed at the other end of the side plate;

[0007] A printed circuit board, wherein the printed circuit board is fixed to the support member;

[0008] A clamping member is connected to the side plate, the clamping member is located between the two supporting members, and the clamping member clamps a part of the printed circuit board.

[0009] Furthermore, the clamping member includes a connecting plate and a pair of clamping plates, the connecting plate is connected to the side plate, one of the clamping plates is connected to the first end of the connecting plate, and the other clamping plate is connected to the other end of the connecting plate, the two clamping plates are arranged opposite to each other, and a slot is formed between the two clamping plates, wherein a portion of the printed circuit board is located in the slot.

[0010] Furthermore, a surface of the clamping plate close to the printed circuit board is attached to the printed circuit board.

[0011] Furthermore, at least one of the clamping plates is provided with a first opening, and the first opening extends from an end of the clamping plate away from the side plate toward an end close to the side plate.

[0012] Furthermore, the clamp has a second opening on a side away from the side plate, the second opening is connected to the slot, and the opening size of the second opening on the side away from the side plate is larger than the opening size of the second opening on the side close to the side plate.

[0013] Furthermore, the backlight module also includes a flexible member, and the flexible member is arranged on a surface of the clamping plate close to the printed circuit board.

[0014] Furthermore, a surface of the clamping plate close to the printed circuit board is provided with an arc-shaped protrusion.

[0015] Furthermore, the distances between the two support members and the clamping member are equal.

[0016] Furthermore, the cross section of the clamping member is U-shaped.

[0017] In a second aspect, an embodiment of the present application provides a display device, which includes a flexible circuit board, a display panel and the backlight module, and the thin film transistor array substrate of the display panel is connected to the printed circuit board through the flexible circuit board.

[0018] Beneficial effects of this application:

[0019] The present application provides a backlight module, which is connected to the side panel by arranging the clamping member, the clamping member is located between the two supporting members, and the clamping member clamps a part of the printed circuit board, so that the clamping member can fix the middle position of the printed circuit board. When the printed circuit board is squeezed by an external force, the middle position of the printed circuit board can be prevented from being deformed and causing the flexible circuit board to twist, thereby improving the problem of poor noise of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the connection between the printed circuit board and the backplane of the backlight module of the traditional solution;

[0021] Figure 2 yes Figure 1 A cross-sectional view of the connection between the printed circuit board of the backlight module and the back plate;

[0022] Figure 3 It is a schematic diagram of a backlight module of a traditional solution;

[0023] Figure 4 is a schematic diagram of the backlight module of the present application;

[0024] Figure 5 It is a schematic diagram of the connection between the printed circuit board and the backplane of the backlight module of the present application;

[0025] Figure 6 yes Figure 5 A cross-sectional view of the connection between the printed circuit board of the backlight module and the back plate;

[0026] Figure 7 is a schematic diagram of a first structure of a clamping member of a backlight module of the present application;

[0027] Figure 8 It is a schematic diagram of the second structure of the clamping member of the backlight module of the present application.

[0028] 100 - back plate, 110 - bottom plate, 120 - side plate; 200 - support member; 300 - printed circuit board; 400 - clamping member, 410 - connecting plate, 420 - clamping plate, 421 - first opening, 430 - card slot, 431 - second opening; 500 - flexible circuit board; 600 - thin film transistor array substrate.

[0029] 10 - back plate, 11 - bottom plate, 12 - side plate; 20 - printed circuit board; 30 - folding ears; 40 - flexible circuit board; 50 - thin film transistor array substrate; 60 - opening. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. The technical solutions described below are only used to explain and illustrate the ideas of the present application and should not be regarded as limiting the scope of protection of the present application.

[0031] In addition, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different technical features. The term "plurality" and similar words mean two or more, unless otherwise clearly defined.

[0032] refer to Figure 1-Figure 3The back plate 10, printed circuit board 20 and thin film transistor array substrate 40 of the display device of the conventional solution are installed as follows: openings 60 are set at both ends of the bottom plate 11 of the back plate 10 of the backlight module, a part of the back plate 10 facing the openings 60 is bent to the outside of the back plate 10, so that the two ends of the side plate 12 of the back plate 10 form folding ears 30, and then the two ends of the printed circuit board 20 are fixed, and the printed circuit board 20 is connected to the thin film transistor array substrate 50 through the flexible circuit board 40. When the display device is subjected to the opening and closing test and the twisting test, the printed circuit board 20 will be squeezed by the external force. Since the middle position of the printed circuit board 20 is not fixed, the middle position of the printed circuit board 20 is easy to deform, resulting in the distortion of the flexible circuit board 40, causing the display device to have a bad noise problem.

[0033] The embodiment of the present application provides a display device, referring to Figure 4-Figure 8 The display device includes a flexible circuit board 500, a display panel and a backlight module. The display panel includes a thin film transistor array substrate 600. The backlight module includes a back plate 100, a pair of supporting members 200, a printed circuit board 300 and a clamping member 400.

[0034] Specifically, the back plate 100 includes a bottom plate 110 and a side plate 120 connected to the bottom plate 110; one of the support members 200 is arranged at one end of the side plate 120, and the other support member 200 is arranged at the other end of the side plate 120; the printed circuit board 300 is fixed to the support member 200, and the thin film transistor array substrate 600 is connected to the printed circuit board 300 through the flexible circuit board 500; the clamping member 400, the clamping member 400 is connected to the side plate 120, the clamping member 400 is located between the two support members 200, and the clamping member 400 clamps a part of the printed circuit board 300.

[0035] By arranging the clamping member 400 to be connected with the side plate 120, the clamping member 400 is located between the two supporting members 200, and the clamping member 400 clamps a part of the printed circuit board 300, so that the clamping member 400 can fix the middle position of the printed circuit board 300. When the printed circuit board 300 is squeezed by an external force, the middle position of the printed circuit board 300 can be prevented from being deformed and causing the flexible circuit board 500 to be twisted, thereby improving the problem of poor noise of the display device.

[0036] In this embodiment, the distances between the two supporting members 200 and the clamping member 400 are equal.

[0037] In this embodiment, the distances between the two supporting members 200 and the clamping member 400 are not equal.

[0038] In this embodiment, the cross section of the clamping member 400 is U-shaped.

[0039] In this embodiment, a plurality of clamping members 400 are provided, and the plurality of clamping members 400 are arranged in an array along the length direction of the side plate 120 .

[0040] In this embodiment, the clamping member 400 is fixed to the side plate 120 by laser welding.

[0041] refer to Figure 7 and Figure 8 In this embodiment, the clamping member 400 includes a connecting plate 410 and a pair of clamping plates 420. The connecting plate 410 is connected to the side plate 120, one of the clamping plates 420 is connected to a first end of the connecting plate 410, and the other clamping plate 420 is connected to the other end of the connecting plate 410. The two clamping plates 420 are arranged opposite to each other, and a slot 430 is formed between the two clamping plates 420, wherein a portion of the printed circuit board 300 is located in the slot 430. By setting the clamping member 400 to include the connecting plate 410 and a pair of clamping plates 420, and the connecting plate 410 is connected to the side plate 120, a slot 430 is formed between the two clamping plates 420, thereby ensuring that the clamping member 400 can clamp and fix the printed circuit board 300.

[0042] In this embodiment, a surface of the clamping plate 420 close to the printed circuit board 300 is in contact with the printed circuit board 300. By setting a surface of the clamping plate 420 close to the printed circuit board 300 in contact with the printed circuit board 300, the clamping plate 420 can clamp the printed circuit board 300 with a certain clamping force.

[0043] In this embodiment, the distance between the two clamping plates 420 is smaller than the thickness of the printed circuit board 300 .

[0044] refer to Figure 7 In this embodiment, at least one clamping plate 420 is provided with a first opening 421, and the first opening 421 extends from an end of the clamping plate 420 away from the side plate 120 toward an end close to the side plate 120. By providing the first opening 421, the deformation capacity of the clamping plate 420 can be increased, and when the printed circuit board 300 is inserted into the card slot 430, it is ensured that the clamping plate 420 is more easily deformed, that is, the two clamping plates 420 are bent in a direction away from the printed circuit board 300.

[0045] In this embodiment, the two clamping plates 420 are provided with a first opening 421. The first opening 421 extends from an end of the clamping plate 420 away from the side plate 120 toward an end close to the side plate 120. By providing the first opening 421 on the two clamping plates 420, the deformation capacity of the two clamping plates 420 can be increased, and when the printed circuit board 300 is inserted into the card slot 430, it is ensured that the clamping plates 420 are more easily deformed, that is, the two clamping plates 420 are bent in a direction away from the printed circuit board 300.

[0046] In this embodiment, a first opening 421 is defined on one of the clamping plates 420 .

[0047] In this embodiment, the first openings 421 on the two clamping plates 420 are opposite to each other.

[0048] In this embodiment, the first openings 421 on the two clamping plates 420 are staggered.

[0049] In this embodiment, the number of first openings 421 disposed on the two clamping plates 420 is equal.

[0050] In this embodiment, the numbers of the first openings 421 disposed on the two clamping plates 420 are not equal.

[0051] In this embodiment, reference Figure 8 The side of the clamping member 400 away from the side plate 120 has a second opening 431, the second opening 431 is connected to the card slot 430, and the opening size L1 of the second opening 431 away from the side plate 120 is larger than the opening size L2 of the second opening 431 close to the side plate 120. By setting the opening size L1 of the second opening 431 away from the side plate 120 to be larger than the opening size L2 of the second opening 431 close to the side plate 120, when the printed circuit board 300 and the clamping member 400 are assembled, the printed circuit board 300 can be more easily inserted into the card slot 430 of the clamping member 400, thereby improving the convenience of assembling the printed circuit board 300.

[0052] In this embodiment, the thickness of the printed circuit board 300 is smaller than the size of the second opening 431 away from the side plate 120 , and the thickness of the printed circuit board 300 is greater than the size of the second opening 431 close to the side plate 120 .

[0053] In this embodiment, the backlight module further includes a flexible member, which is disposed on a surface of the clamping plate 420 close to the printed circuit board 300. By disposing the flexible member on a surface of the clamping plate 420 close to the printed circuit board 300, on the one hand, since the flexible member has a certain deformation ability, it can increase the clamping force of the clamping member 400 on the printed circuit board 300, and improve the stability of the connection between the printed circuit board 300 and the clamping member 400; on the other hand, the flexible member can prevent the printed circuit board 300 from directly contacting the clamping plate 420, and reduce the noise generated by the direct collision between the printed circuit board 300 and the clamping plate 420.

[0054] In this embodiment, a flexible member is provided on one surface of the two clamping plates 420 close to the printed circuit board 300. By providing the flexible member on one surface of the two clamping plates 420 close to the printed circuit board 300, on the one hand, since the flexible member has a certain deformation ability, it can increase the clamping force of the clamping member 400 on the printed circuit board 300, and improve the stability of the connection between the printed circuit board 300 and the clamping member 400; on the other hand, the flexible member can prevent the printed circuit board 300 from directly contacting the clamping plate 420, and reduce the noise generated by the direct collision between the printed circuit board 300 and the clamping plate 420.

[0055] In this embodiment, a surface of one of the clamping plates 420 close to the printed circuit board 300 is provided with a flexible member, and a surface of the other clamping plate 420 close to the printed circuit board 300 is not provided with a flexible member.

[0056] In this embodiment, a curved protrusion is provided on a surface of the clamping plate 420 close to the printed circuit board 300. By providing the curved protrusion, the curved protrusion can directly contact the surface of the printed circuit board 300, thereby increasing the stability of the contact between the printed circuit board 300 and the clamping plate 420, thereby improving the stability of the connection between the clamping member 400 and the printed circuit board 300.

[0057] In this embodiment, arc-shaped protrusions are provided on one surface of the two clamping plates 420 close to the printed circuit board 300. By providing the arc-shaped protrusions on one surface of the two clamping plates 420 close to the printed circuit board 300, the arc-shaped protrusions can directly contact the surface of the printed circuit board 300, thereby increasing the stability of the contact between the printed circuit board 300 and the clamping plates 420, thereby improving the stability of the connection between the clamping member 400 and the printed circuit board 300.

[0058] In this embodiment, a surface of one of the clamping plates 420 close to the printed circuit board 300 is provided with an arc-shaped protrusion, and a surface of the other clamping plate 420 close to the printed circuit board 300 is not provided with an arc-shaped protrusion.

[0059] The steps of assembling and fixing the printed circuit board 300 are as follows:

[0060] First, the clamping member 400 is manufactured by stamping;

[0061] Then the clamping member 400 is welded to the side plate 120 of the back plate 100;

[0062] Then, the printed circuit board 300 is inserted into the slot 430 of the clamping member 400;

[0063] Finally, the printed circuit board 300 and the support member 200 are fixed by screws.

[0064] The technical solution of this application is specifically as follows:

[0065] The installation method of the back panel 10, printed circuit board 20 and thin film transistor array substrate of the display device of the notebook computer in the traditional scheme is as follows: since the folding ears 30 of the back panel 10 of the existing backlight module are realized by the back panel 10 stamping process, limited by the design strength requirements of the backlight module, if a gap appears in the middle position of the side panel of the back panel 10, it will cause the structural strength of the backlight module to be reduced, and electronic components are installed on the printed circuit board 20, and it is not possible to open a hole 60 in the middle position of the side panel of the back panel 10. Therefore, the folding ears 30 of the back panel 10 can only be set on both sides of the back panel 10, that is, openings 60 are set at both ends of the bottom plate 11 of the back panel 10 of the backlight module, and a part of the back panel 10 facing the opening 60 is bent to the outside of the back panel 10, so that the two ends of the side panel 12 of the back panel 10 form folding ears 40, and then the two ends of the printed circuit board 20 are fixed, and the printed circuit board 20 is connected to the thin film transistor array substrate 50 through the flexible circuit board 40. When the display device is subjected to an opening and closing test and a twisting test, the printed circuit board 20 is squeezed by an external force. Since the middle position of the printed circuit board 20 is not fixed, the middle position of the printed circuit board 20 is easily deformed, causing the flexible circuit board 40 to twist, resulting in a noise problem in the display device.

[0066] Therefore, the technical solution of the present application is to set a clamping member 400 connected to the side plate 120, and the clamping member 400 is located between the two supporting members 200, and the clamping member 400 clamps a part of the printed circuit board 300, so that the clamping member 400 can fix the middle position of the printed circuit board 300. When the printed circuit board 300 is squeezed by an external force, the middle position of the printed circuit board 300 can be prevented from being deformed and causing the flexible circuit board 500 to twist, thereby improving the problem of poor noise of the display device, and also ensuring the structural strength of the backlight module.

[0067] The above is a detailed description of the specific implementation of the present application. The above implementation disclosed in the present application is only the preferred implementation of the present application. For ordinary technicians in this field, many modifications and improvements can be made without departing from the concept of the present application. These modifications and improvements all fall within the scope of protection defined by the claims of the present application.

Claims

1. A backlight module, characterized in that: include: A back plate, the back plate comprising a bottom plate and a side plate connected to the bottom plate; A pair of support members, wherein one of the support members is disposed at one end of the side plate, and the other support member is disposed at the other end of the side plate; A printed circuit board, wherein the printed circuit board is fixed to the support member; A clamping member is connected to the side plate, the clamping member is located between the two supporting members, and the clamping member clamps a part of the printed circuit board.

2. The backlight module according to claim 1, characterized in that: The clamping member includes a connecting plate and a pair of clamping plates, wherein the connecting plate is connected to the side plate, wherein one of the clamping plates is connected to the first end of the connecting plate, and the other clamping plate is connected to the other end of the connecting plate, the two clamping plates are arranged opposite to each other, and a slot is formed between the two clamping plates, wherein a portion of the printed circuit board is located in the slot.

3. The backlight module according to claim 2, characterized in that: A surface of the clamping plate close to the printed circuit board is attached to the printed circuit board.

4. The backlight module according to claim 3, characterized in that: At least one of the clamping plates is provided with a first opening, and the first opening extends from an end of the clamping plate away from the side plate toward an end close to the side plate.

5. The backlight module according to claim 2, characterized in that: The clamp has a second opening on a side away from the side plate, the second opening is connected to the slot, and the opening size of the second opening on the side away from the side plate is larger than the opening size of the second opening on the side close to the side plate.

6. The backlight module according to claim 2, characterized in that: The backlight module further comprises a flexible member, and the flexible member is arranged on a surface of the clamping plate close to the printed circuit board.

7. The backlight module according to claim 2, characterized in that: A surface of the clamping plate close to the printed circuit board is provided with an arc-shaped protrusion.

8. The backlight module according to claim 1, characterized in that: The distances between the two support members and the clamping member are equal.

9. The backlight module according to claim 1, characterized in that: The cross section of the clamping member is U-shaped.

10. A display device, characterized in that: The display device comprises a flexible circuit board, a display panel and the backlight module according to any one of claims 1 to 9, and the thin film transistor array substrate of the display panel is connected to the printed circuit board through the flexible circuit board.

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