CN103912854A - Backplane, backlight module and liquid crystal display module - Google Patents

Abstract

The utility model provides a backboard, its includes the underframe and is connected to the lateral wall of underframe, and the underframe is including the last frame unit, left frame unit, lower frame unit and the right frame unit that connect gradually, and the underframe still includes the center unit, and the center unit is connected between left frame unit and right frame unit. The invention also provides a backlight module and a liquid crystal display module comprising the back plate. The back plate can effectively protect optical elements in the liquid crystal display panel and the backlight module, and improves the production yield; the backlight module and the liquid crystal display module have better production yield.

Description

Backplane, backlight module and liquid crystal display module

technical field

The invention relates to the field of display technology, in particular to a backplane, a backlight module and a liquid crystal display module.

Background technique

Liquid crystal display (LCD, Liquid Crystal Display) has the advantages of thin body, power saving, small radiation, etc., and has been widely used. Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display module, and the liquid crystal display module further includes a liquid crystal display panel and a backlight module (Backlight Module).

In the production process, in order to detect the performance of the liquid crystal display module, the liquid crystal display module can be pressure tested according to the customer's requirements. Figure 1 shows a pressure test for the back of the liquid crystal display module in the prior art. schematic diagram. Please refer to Fig. 1, pressure can be applied to the back of the liquid crystal display module 10 (that is, the surface opposite to the display surface of the liquid crystal display module 10) through the indenter 101. The indenter 101 is cylindrical, and its cross-sectional diameter and applied The size of the pressure can be set according to actual needs. When applying pressure, the pressure head 101 moves sequentially, and each pressure application position is closely arranged next to each other until the pressure head 101 completes the pressure on the entire back surface of the liquid crystal display module 10 . With the help of stress testing, the weaknesses of the LCD module 10 can be found in time, for example, whether there are potential quality problems in the gate IC, source IC, and LCD panel, so as to improve the LCD module 10. The delivery quality is improved, and the service life of the liquid crystal display module 10 is extended.

FIG. 2 is another schematic diagram of stress testing the back of the liquid crystal display module in the prior art. According to the customer's special requirements, the pressing position of the pressure head 201 is shown in FIG. 2 . The liquid crystal display module 20 includes a backlight module 22 and a liquid crystal display panel disposed on the backlight module 22 . The backlight module 22 may include a backplane, a reflector 223, a light source, and other optical components. The backplane includes a bottom frame 222a and four side walls extending vertically in the same direction from around the bottom frame 222a. The bottom frame 222a is a slot-shaped frame body. , which includes an upper frame unit, a left frame unit, a lower frame unit and a right frame unit connected in sequence. The reflection sheet 223 is disposed on the bottom frame 222a. When carrying out the pressure test on the back of the liquid crystal display module 20, the pressing position of the indenter 201 is arranged in a straight line, and the straight line is located between the upper frame unit and the lower frame unit of the bottom frame 222a, and is parallel to the upper frame unit and the lower frame unit. The lower frame unit roughly bisects the bottom frame 222a.

However, since the pressure application area A is not protected by the back plate, the optical elements in the backlight module 22 are easily damaged, such as causing white spot defects in the backlight module 22 , affecting the yield of the backlight module 22 and the liquid crystal display module 20 .

Contents of the invention

The purpose of the present invention is to provide a backplane, which can effectively protect the optical elements in the liquid crystal display panel and the backlight module, and improve the production yield.

The purpose of the present invention is also to provide a backlight module and a liquid crystal display module with better production yield.

In order to achieve the above advantages, the present invention provides a backplane, which includes a bottom frame and a side wall connected to the bottom frame, the bottom frame includes an upper frame unit, a left frame unit, a lower frame unit and a right frame unit connected in sequence, and the bottom frame It also includes a middle frame unit connected between the left frame unit and the right frame unit.

In one embodiment of the present invention, the middle frame unit is parallel to the upper frame unit and the lower frame unit, and the distance between the middle frame unit and the upper frame unit is equal to the distance between the middle frame unit and the lower frame unit.

In one embodiment of the present invention, the width of the middle frame unit is greater than or equal to the diameter of the indenter in the pressure test.

In one embodiment of the present invention, the material of the backboard is metal.

The present invention also provides a backlight module, which includes a light source and an optical element. The backlight module further includes any one of the above-mentioned back plates, and the light source and the optical elements are arranged in the back plate.

In one embodiment of the present invention, the backlight module further includes a middle frame, and the middle frame is buckled on the back panel.

In one embodiment of the present invention, the optical element includes a reflective sheet, a light guide plate and an optical film, the reflective sheet, the light guide plate and the optical film are sequentially arranged on the bottom frame of the back plate, and the number of light sources is two , the two light sources are respectively arranged on the side wall of the back plate and located on two opposite sides of the light guide plate.

The present invention also provides a liquid crystal display module, which includes a backlight module, a liquid crystal display panel and a front frame. The liquid crystal display panel is arranged on the backlight module and arranged in the front frame, and the front frame is buckled on the backlight module. The backlight module also includes any one of the above-mentioned backplanes.

In the backplane, backlight module and liquid crystal display module of the present invention, since the bottom frame of the backplane is provided with a middle frame unit, when the pressure test is carried out on the back of the liquid crystal display module, the middle frame unit of the backplane can effectively Protecting the backlight module prevents damage to the optical elements in the backlight module and also avoids damage to the liquid crystal display panel, thereby helping to improve the production yield of the backlight module and the liquid crystal display module.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a pressure test performed on the back of a liquid crystal display module in the prior art.

FIG. 2 is another schematic diagram of stress testing the back of the liquid crystal display module in the prior art.

FIG. 3 is a schematic diagram of a pressure test performed on the back of the liquid crystal display module of the present invention.

FIG. 4 is a schematic cross-sectional view of the liquid crystal display module in FIG. 3 .

Detailed ways

In order to further explain the technical means and effects that the present invention adopts to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. .

Fig. 3 shows the schematic diagram of the pressure test on the back side of the liquid crystal display module of the present invention, and Fig. 4 shows the cross-sectional schematic diagram of the liquid crystal display module of Fig. 3. Draw the front frame. Referring to FIG. 3 and FIG. 4 , the liquid crystal display module 30 includes a backlight module 32 , a liquid crystal display panel 33 and a front frame 34 . The backlight module 32 includes a backplane 322 , optical elements, a light source 326 and a middle frame 327 .

The material of the back plate 322 can be metal, such as iron, but not limited thereto. The back plate 322 includes a bottom frame 322a and a side wall 322b connected to the bottom frame 322a. The bottom frame 322a is roughly a Japanese-shaped frame body, which includes an upper frame unit 322c, a left frame unit 322d, a lower frame unit 322e, and a right frame unit 322f And the middle frame unit 322g, the upper frame unit 322c, the left frame unit 322d, the lower frame unit 322e and the right frame unit 322f are sequentially connected, and the middle frame unit 322g is connected between the left frame unit 322d and the right frame unit 322f. The middle frame unit 322g is parallel to the upper frame unit 322c and the lower frame unit 322e, and the distance between the middle frame unit 322g and the upper frame unit 322c is equal to the distance between the middle frame unit 322g and the lower frame unit 322e, but not limited thereto, In other embodiments, the distance between the middle frame unit 322g, the upper frame unit 322c and the lower frame unit 322e can be adjusted according to the location of the stress test. The sidewalls 322b extend vertically from the edge of the bottom frame 322a in the same direction. In this embodiment, the number of sidewalls 322b is four, and an accommodating space is formed in the back plate 322 for accommodating the optical elements and the light source 326 .

The optical elements and light source 326 are arranged in the back plate 322. The optical elements include a reflective sheet 323, a light guide plate 324 and an optical film 325. The reflective sheet 323, the light guide plate 324, and the optical film 325 are sequentially arranged on the bottom of the back plate 322. On the frame 322 a , the light source 326 is disposed on the side wall 322 b of the back plate 322 and located on two sides of the light guide plate 324 . The reflective sheet 323 is used for reflecting the light directly emitted by the light source 326 and the light entering the light guide plate 324 and transmitted to the reflective sheet 323 . The light guide plate 324 is disposed on the reflection sheet 323 . The number of optical films 325 can be multiple, which are disposed on the light guide plate 324 , and the optical films 325 can be diffusion sheets or prism sheets, but not limited thereto. There are two light sources 326 , which are respectively disposed on the two sidewalls 322 b of the back plate 322 , and located above the reflection sheet 323 and on two opposite sides of the light guide plate 324 . The middle frame 327 is fastened on the back plate 322 , which seals the edges of the optical components in the backlight module 32 and exposes the light emitting surfaces of the optical components in the backlight module 32 . The liquid crystal display panel 33 is disposed on the middle frame 327 of the backlight module 32 and is arranged in the front frame 34 , and the front frame 34 is buckled on the back plate 322 of the backlight module 32 .

It should be noted that the specific structure of the liquid crystal display module 30 is not limited to FIG. 4 . In FIG. 4 , the backlight module 32 is a side-light type backlight module. Direct type backlight module.

When performing a pressure test on the back of the liquid crystal display module 30 , please refer to FIG. 3 , the pressing position of the indenter 301 acts on the left frame unit 322d , the middle frame unit 322g and the right frame unit 322f . Specifically, the indenter 301 can apply pressure from left to right, or from right to left. Taking the indenter 301 to apply pressure to the back of the liquid crystal display module 30 from left to right as an example, the indenter 301 can be first Contact the left frame unit 322d and the middle frame unit 322g and apply pressure. After the pressure is completed, move the indenter 301 to the right along the extension direction of the middle frame unit 322g, and use the indenter 301 to press the back of the liquid crystal display module 30. Pressure is applied until the position of pressure is moved to the right frame unit 322f, and the pressure test is completed.

In this embodiment, the relevant parameters of the pressure test can be set according to customer requirements. For example, the diameter of the indenter 301 is 10 millimeters (mm), the applied pressure is 8 to 15 kilograms force (kgf), and the indenter 301 is Apply pressure 10 times to each pressure location. The width of the middle frame unit 322g is greater than or equal to the diameter of the indenter 301, and the diameter of the indenter 301 is 10 mm, so the width of the middle frame unit 322g is greater than or equal to 10 mm to protect the optical elements in the backlight module 32.

In the back plate 322, the backlight module 32 and the liquid crystal display module 30 of the present invention, since the bottom frame 322a of the back plate 322 is provided with a middle frame unit 322g, when the back of the liquid crystal display module 30 is subjected to a pressure test, the back The middle frame unit 322g of the board 322 can effectively protect the backlight module 32, avoid damage to the optical elements in the backlight module 32 and also avoid damage to the liquid crystal display panel 33, thereby facilitating the improvement of the backlight module 32 and the liquid crystal display module 30. production yield.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (8)

1. A backboard, comprising a bottom frame and a side wall connected to the bottom frame, the bottom frame includes an upper frame unit, a left frame unit, a lower frame unit and a right frame unit connected in sequence, wherein the The bottom frame also includes a middle frame unit connected between the left frame unit and the right frame unit. 2. The backplane according to claim 1, wherein the middle frame unit is parallel to the upper frame unit and the lower frame unit, and the distance between the middle frame unit and the upper frame unit It is equal to the distance between the middle frame unit and the lower frame unit. 3. The backplane according to claim 1, wherein the width of the middle frame unit is greater than or equal to the diameter of the indenter in the pressure test. 4. The backplane according to claim 1, wherein the material of the backplane is metal. 5. A backlight module, comprising a light source and an optical element, characterized in that the backlight module further comprises the backplane according to any one of claims 1 to 4, and the light source and the optical element are arranged on inside the backplane. 6. The backlight module according to claim 5, characterized in that: the backlight module further comprises a middle frame, and the middle frame is fastened to the backplane. 7. The backlight module according to claim 6, wherein the optical element comprises a reflector, a light guide plate and an optical film, and the reflector, the light guide plate and the optical film are sequentially arranged on the On the bottom frame of the backplane, there are two light sources, and the two light sources are respectively arranged on the side walls of the backplane and located on two opposite sides of the light guide plate. 8. A liquid crystal display module, comprising a backlight module, a liquid crystal display panel and a front frame, the liquid crystal display panel is configured on the backlight module and is arranged in the front frame, and the front frame is fastened to the The backlight module is characterized in that the backlight module further comprises the backplane according to any one of claims 1-4.