CN109739052B

CN109739052B - Back plate, backlight module and display device

Info

Publication number: CN109739052B
Application number: CN201910132728.2A
Authority: CN
Inventors: 付琳琳; 常建宇; 丘永元; 苏赞加; 俞刚; 罗柱平
Original assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Current assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2021-10-08
Anticipated expiration: 2039-02-22
Also published as: CN109739052A

Abstract

The invention provides a back plate, a backlight module and a display device, wherein the display device comprises the backlight module; the backlight module comprises a back plate, a diffusion plate and a support frame; the back plate comprises a plate body, a through hole, a connecting plate and more than two buffer parts; when the surface of the diffusion plate is subjected to external pressure, the buffer part generates elastic deformation to absorb the pressure transmitted to the back plate by the diffusion plate, so that the support frame is not damaged after being stressed, and the display quality of the display device is improved.

Description

Back plate, backlight module and display device

Technical Field

The invention relates to the technical field of display, in particular to a back plate, a backlight module and a display device.

Background

With the popularization of LED backlight lcd screens, LEDs also become the best backlight source for current display screens. Generally, the LED backlight can be divided into a direct type backlight module and a side type backlight module according to incident positions, the existing direct type backlight module has two common forms, one is a surface-mounted LED, and the number of the LEDs is large; the other is a surface-mount LED with a secondary lens, requiring a smaller number of LEDs. However, in order to realize any of the above forms, the diffuser plate is disposed above the back plate, the diffuser plate is thin and has a large space with the back plate, the diffuser plate may be deformed due to thermal contraction and expansion, or vibration of the diffuser plate during transportation, and in order to prevent the middle of the diffuser plate from sinking and affecting the display quality of the display panel, a diffuser plate Support frame (Support Pin) is often disposed in the middle of the diffuser plate to prevent deformation of the diffuser plate. Because the material of support frame is the rigidity, so in the in-process of transportation, the support frame bumps with the diffuser plate, and then the support frame can take place to warp, bend, fracture scheduling problem, and then leads to the diffuser plate to lose the function of supporting.

In the prior art, a buffer structure is generally directly arranged on the support frame, but the structure of the support frame cannot be too large because the support frame can shield light rays too much, and the size of the buffer structure of the support frame is limited. In addition, the support frame having the buffer structure is easily interfered with the reflective sheet during assembly.

Disclosure of Invention

The invention aims to provide a back plate, a backlight module and a display device, and aims to solve the technical problem that a support frame is deformed, bent and broken under stress to cause a diffusion plate to lose a support function in the prior art.

The invention provides a backboard, which comprises a board body, a through hole, a connecting plate and more than two buffering parts, wherein the through hole penetrates through the board body; the connecting plate is arranged in the middle of the through hole and is parallel to the plate body; one end of the buffer part is connected to the edge of the connecting plate, and the other end of the buffer part is connected to the plate body at the edge of the through hole.

Furthermore, the plate body, the connecting plate and the buffer part are of an integrated structure.

Further, the buffer part includes a first buffer plate and a second buffer plate connected to each other; one end of the first buffer plate is connected to the edge of the connecting plate, and the other end of the first buffer plate is connected to the second buffer plate; one end of the second buffer plate is connected to the first buffer plate, and the other end of the second buffer plate is connected to the plate body at the edge of the through hole.

Further, the first buffer plate and the second buffer plate are larger than 90 degrees and smaller than 150 degrees.

The invention provides a backlight module, which comprises the back plate.

Furthermore, the backlight module also comprises a diffusion plate and a support frame, wherein the diffusion plate is arranged opposite to the back plate; the support frame is arranged between the diffusion plate and the back plate and used for supporting the diffusion plate.

Further, the support frame is arranged opposite to the connecting plate, and the bottom of the support frame is fixed to one side surface of the connecting plate.

Further, when the height of the supporting frame is larger than or equal to 15mm, the height of the buffer part is 3.5 mm-5.5 mm.

Further, when the height of the support frame is greater than or equal to 5mm and less than 15mm, the height of the buffer part is 2.5 mm-3.5 mm.

The invention also provides a display device comprising the backlight module.

The technical effect of the invention is that the back plate is provided with a plurality of through holes, a plurality of connecting plates and a plurality of buffer parts, when the surface of the diffusion plate is subjected to external pressure, the buffer parts generate elastic deformation to absorb the pressure transmitted to the back plate by the diffusion plate, so that the support frame is not damaged after being stressed, and the display quality of the display device is improved.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a backing plate according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a back plate according to an embodiment of the present invention.

Some of the symbols in the drawings are as follows:

11, a plate body; 12 through holes;

13 connecting plates; 14 buffer part

1401 a first buffer portion; 1402 a second buffer portion;

141 a first buffer plate; 142 a second buffer plate;

1411 a first end; 1412 a second end;

1421 a third terminal; 1422 a fourth end;

1 a back plate; 2, a diffusion plate;

3, supporting the frame.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings for illustrating the invention and enabling those skilled in the art to fully describe the technical contents of the present invention so that the technical contents of the present invention can be more clearly and easily understood. The present invention may, however, be embodied in many different forms of embodiments and the scope of the present invention should not be construed as limited to the embodiments set forth herein.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

As shown in fig. 1-2, the present embodiment provides a back plate, the back plate 1 includes a plate body 11, a through hole 12, a connecting plate 13, and two or more buffering portions 14.

The plate body 11, the connecting plate 13 and the buffer part 14 are of an integrated structure, so that the installation operation of the plate body 11, the connecting plate 13 and the buffer part 14 can be simplified, and the buffer part 14 can better absorb the pressure applied to the connecting plate 13.

The plate body 11 is a part of the back plate 1; the through hole 12 penetrates through the plate body 11; the connecting plate 13 is disposed in the through hole 12 and parallel to the plate body 11, and in this embodiment, the number of the through hole 12, the connecting plate 13 and the buffer portion 14 is not limited, and those skilled in the art can set the connecting plate according to actual requirements.

The buffer 14 includes a first buffer 1401 and a second buffer 1402. One end of the connection plate 13 is connected to the first buffer 1401, and the other end thereof is connected to the second buffer 1402. The size of the first buffer portion 1401 is adapted to the size of the second buffer portion 1402, so that the buffer portions on both sides of the connecting plate 13 are uniformly stressed under the action of external force, and the impact resistance is better.

Specifically, each buffer portion 14 includes a first buffer plate 141 and a second buffer plate 142 connected to each other, and the buffer plates are preferably straight plates, but are not limited to buffer plates made of other materials. The first end 1411 of the first buffer plate 141 is connected to the edge of the connection plate 13, and the second end 1412 of the first buffer plate 141 is connected to the second buffer plate 142; the third end 1421 of the second buffer plate 142 is connected to the first buffer plate 141, and the fourth end 1422 of the second buffer plate 142 is connected to the plate body 11 at the edge of the through hole 12. The angle between the first buffer plate 141 and the second buffer plate 142 is greater than 90 degrees and less than 150 degrees, which provides a good structural stability, and the buffer 14 can be rapidly restored to the original state when the pressure applied to the buffer 14 is removed.

As shown in fig. 1-2, the present embodiment further provides a backlight module, which is a direct-type backlight module, and the backlight module includes the aforementioned back plate 1, a diffusion plate 2 and a supporting frame 3.

The back plate 1 is a common back plate, and has a plurality of through holes 12, a plurality of connecting plates 13, and a plurality of cushioning portions 14. The buffer part 14 is used to absorb the pressure applied to the back plate by the diffusion plate 2.

The diffuser plate 2 is a plate material that interferes light to a certain degree, and is disposed opposite to the back plate 1.

The support frame 3 is arranged between the diffusion plate 2 and the back plate 1 and used for supporting the diffusion plate 2 and preventing the middle of the diffusion plate 2 from being sunken, the longitudinal section of the support frame 3 is in the shape of an isosceles triangle, the support frame 2 is arranged opposite to the connecting plate 13, and the bottom of the support frame 2 is fixedly connected to the connecting plate 13. When diffuser plate 2 surface receives pressure, diffuser plate 2 transmits support frame 2 with pressure, and the pressure that support frame 2 received acts on connecting plate 13, again because the both ends of connecting plate 13 are equipped with buffer 14, when support frame 2 receives external force extrusion, buffer 14 produces elastic deformation to absorb the pressure that diffuser plate 13 transmitted to backplate 1, support frame 2 is not destroyed after receiving pressure, and support frame 3 supports the effect stability of diffuser plate 2 moreover.

In order to avoid that the optical member and the panel on the upper surface of the diffuser plate are impacted due to too high rebound speed of the buffer part 14, the buffer part 14 needs to realize the effect of slow rebound, and specifically, the material of the buffer part 14, the structural parameters of the buffer part 14, and the like can be selected appropriately.

According to the stress condition of the actual diffusion plate 2, the appropriate height range of the buffer part 14 is selected, because when the height of the buffer part 14 is lower, the buffer part 14 is favorable for elastic deformation, the buffer effect is good, but the stress of the support frame 3 and the connecting plate 13 is larger, so that the support frame 3 and the connecting plate 13 are easily damaged; when the height of the buffer portion 14 is high, the buffer portion 14 is not easily elastically deformed, and the buffering effect is not good. Therefore, it is preferable that the height of the buffer part 14 is 3.5mm to 5.5mm when the height of the support frame 3 is greater than or equal to 15 mm; when the height of support frame is more than or equal to 5mm, and is less than 15mm, the height of buffer 14 is 2.5mm ~ 3.5mm, through set up buffer 14 on backplate 1, can solve the structure of support frame big, shelters from the drawback of light, but also can prevent that the support frame from being out of shape, bending, fracture scheduling problem.

The embodiment further provides a display device, which includes the backlight module described above, the backlight module is provided with at least two buffering portions on the back plate, when the surface of the diffusion plate is subjected to external pressure, the buffering portions elastically deform to absorb the pressure transmitted by the diffusion plate to the back plate, so that the supporting frame is not damaged, and the display quality of the display device is improved.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A backboard is characterized by comprising

A plate body;

the through hole penetrates through the plate body;

the connecting plate is arranged in the middle of the through hole and is parallel to the plate body; more than two buffer parts, one end of each buffer part is connected to the edge of the connecting plate, and the other end of each buffer part is connected to the plate body at the edge of the through hole;

wherein the content of the first and second substances,

the plate body, the connecting plate and the buffer part are of an integrated structure;

the buffer part comprises a first buffer plate and a second buffer plate which are connected with each other;

one end of the first buffer plate is connected to the edge of the connecting plate, and the other end of the first buffer plate is connected to the second buffer plate; one end of the second buffer plate is connected to the first buffer plate, and the other end of the second buffer plate is connected to the plate body at the edge of the through hole;

the included angle between the first buffer plate and the second buffer plate is larger than 90 degrees and smaller than 150 degrees.

2. A backlight module comprises

The backing sheet of claim 1.

3. The backlight module of claim 2, further comprising

A diffuser plate disposed opposite the back plate; and

the support frame is arranged between the diffusion plate and the back plate and used for supporting the diffusion plate;

the support frame is arranged opposite to the connecting plate, and the bottom of the support frame is fixed to one side surface of the connecting plate.

4. The backlight module of claim 3,

when the height of the support frame is larger than or equal to 15mm, the height of the buffer part is 3.5 mm-5.5 mm.

5. The backlight module of claim 3,

when the height of the support frame is greater than or equal to 5mm and less than 15mm, the height of the buffer part is 2.5 mm-3.5 mm.

6. A display device comprising the backlight module of any one of claims 2-5.