CN215181290U

CN215181290U - Back plate, backlight module and display device

Info

Publication number: CN215181290U
Application number: CN202120840252.0U
Authority: CN
Inventors: 代海龙; 马骋; 于昊
Original assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; K Tronics Suzhou Technology Co Ltd; Gaochuang Suzhou Electronics Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-14
Anticipated expiration: 2031-04-22

Abstract

The disclosure provides a back plate, a backlight module and a display device. The back plate is used for a backlight module and comprises a back plate main body and a back plate side wall connected with the edge of the back plate main body; the back plate main body includes: the first back plate area and the side wall of the back plate form a first accommodating cavity on one side facing the light source; and the second back plate area is connected with the first back plate area, a second accommodating cavity for accommodating a display device mainboard is formed on one side facing the light source, and the depth of the second accommodating cavity is greater than that of the first accommodating cavity. The back plate, the backlight module and the display device can place the display device mainboard in the back plate of the backlight module, so that the shell can be saved, and the cost is reduced.

Description

Back plate, backlight module and display device

Technical Field

The utility model relates to a show technical field, especially relate to a backplate, backlight unit and display device.

Background

A Liquid Crystal Display (LCD) has advantages of thin body, power saving, no radiation, and the like, and is widely used. A conventional lcd device generally includes an lcd panel and a backlight module. The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and light rays emitted by the backlight module are controlled to display different pictures by controlling the deflection of the liquid crystal molecules.

In the mainstream direct type LCD backlight module, the main board is generally externally arranged outside the cavity of the back plate, and then the rear shell is used for covering the main board and various wiring lines. Because the rear shell often has the problems of high-temperature high-humidity deformation, even fading, cracking and the like, the rework is needed, and the cost is greatly increased.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a back plate, a backlight module and a display device.

In view of the above, the present disclosure provides a back plate for a backlight module, including a back plate main body and a back plate sidewall connected to an edge of the back plate main body; the back plate main body includes:

the first back plate area and the side wall of the back plate form a first accommodating cavity on one side facing the light source;

and the second back plate area is connected with the first back plate area, a second accommodating cavity for accommodating a display device mainboard is formed on one side facing the light source, and the depth of the second accommodating cavity is greater than that of the first accommodating cavity.

Optionally, the second backplane region is connected to the first backplane region through a sub-sidewall; the back plate further comprises:

and the at least one outlet is arranged on the sub side wall.

Optionally, the method further includes:

the shading sheet is arranged in the second accommodating cavity and is parallel to the second back plate area;

the display device mainboard is arranged between the shading sheet and the second backboard area.

Optionally, an orthographic projection of the light shielding sheet on the back plate coincides with an orthographic projection of the second accommodating cavity on the back plate.

Optionally, the light source includes:

the first light bar is arranged in the first back plate area;

the second lamp strip is arranged on one surface, far away from the second back plate area, of the shading sheet and fixed in the same plane with the first lamp strip.

Optionally, the method further includes:

and the heat dissipation blocking strip is arranged between the second lamp strip and the light shield, and one side of the heat dissipation blocking strip facing the second lamp strip and one side of the first backboard area facing the first lamp strip are positioned in the same plane.

Optionally, the heat dissipation stop strip comprises a rectangular metal strip, two ends of the heat dissipation stop strip are mounted on the back plate through screws, and the width of the heat dissipation stop strip is greater than or equal to that of the second light bar.

Optionally, the depth of the first accommodating cavity is 20-35mm, and the depth of the second accommodating cavity is 40-55 mm.

The present disclosure also provides a backlight module, which includes a reflector plate, an optical film set disposed on one side of the reflector plate, and a back plate disposed on the other side of the reflector plate.

The present disclosure further provides a display device, which includes a display panel and the backlight module according to the above embodiment.

As can be seen from the above, according to the back plate, the backlight module and the display device provided by the disclosure, the back plate main body is divided into the first back plate area and the second back plate area, and the second accommodating cavity formed in the second back plate area is large enough, so that not only can the display structures such as the light source, the optical film, the reflector plate and the like be accommodated, but also the display device main board can be accommodated, and thus the display device main board is installed inside the backlight module, so that the back shell can be saved, and the cost is saved; meanwhile, the back plate is generally made of metal materials, so that the back plate is not deformed, faded and cracked due to high temperature and high humidity like the back shell; and the appearance of the whole backboard is more integrated, and the appearance is cleaner and tidier.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a back plate according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a partial structure of a back plate according to an embodiment of the present disclosure;

FIG. 3 is a top view of a backplane structure according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a backplate according to an embodiment of the present disclosure;

FIG. 5 is a side view of a back plate structure according to an embodiment of the present disclosure;

FIG. 6 is another schematic structural diagram of a backing plate according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a display device according to an embodiment of the disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should have the ordinary meaning as understood by those having ordinary skill in the art to which the present disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The main board of the liquid crystal display device is used for controlling liquid crystal molecules in the liquid crystal panel and controlling the LED lamp strip in the backlight module. The main board of the liquid crystal display device is generally arranged outside the back board cavity of the backlight module, and then the rear shell is used for covering the main board and various routing wires; since the rear case has a high defective rate and high cost and the sound of the rear case is deformed, discolored, and cracked due to high temperature and high humidity, the cost of the entire liquid crystal display device is increased.

The embodiment of the disclosure provides a back plate, which is used for a backlight module. Fig. 1 is a schematic view of a back plate structure according to an embodiment of the disclosure; fig. 2 is a schematic structural diagram of a back plate part according to an embodiment of the disclosure.

As shown in fig. 1 and 2, the backplate includes a backplate main body 1 and a backplate side wall 2 connected to an edge of the backplate main body 1, and a cavity for accommodating structures such as a light source, an optical diaphragm, and a reflective sheet is formed by the backplate main body 1 and the backplate side wall 2.

As shown in fig. 2, the back plate main body 1 includes a first back plate area 11 and a second back plate area 12, and light sources can be installed in the first back plate area 11 and the second back plate area 12, so that the display function of the liquid crystal display device is realized by the light emission of the light sources and the control of the liquid crystal display panel. The first backplane region 11 and the backplane side wall 2 form a first accommodating cavity 110 on a side facing the light source, and the first accommodating cavity 110 can be used for accommodating the light source mounted in the first backplane region 11. The second backplane region 12 is connected to the first backplane region 11, and a second receiving cavity 120 for receiving a motherboard of the display device is formed in the second backplane region 12 on a side facing the light source, and the second receiving cavity 120 can receive not only the motherboard 3 of the display device but also the light source mounted in the second backplane region 12. Meanwhile, in order to allow the second receiving cavity 120 to have a sufficient space to receive the display device main board 3, it is necessary to design that the depth D2 of the second receiving cavity 120 is greater than the depth D1 of the first receiving cavity, so as to reserve a sufficient mounting space for the display device main board 3 and other structures.

According to the back plate disclosed by the embodiment of the disclosure, the back plate main body 1 is divided into the first back plate area 11 and the second back plate area 12, and meanwhile, the second accommodating cavity 120 formed in the second back plate area 12 is large enough to accommodate not only a light source, an optical membrane, a reflector and other display structures, but also a display device mainboard, so that the display device mainboard is installed inside the backlight module, a rear shell can be saved, and the cost is saved; meanwhile, the back plate is generally made of metal materials, so that the back plate is not deformed, faded and cracked due to high temperature and high humidity like the back shell; and the appearance of the whole backboard is more integrated, and the appearance is cleaner and tidier.

Optionally, as shown in fig. 3, the second backplane region 12 is located in the middle of the ground side of the whole backplane body 1, so as to facilitate the installation of the display device motherboard and make the appearance of the display device manufactured by the backplane described in this application more beautiful. In other alternative embodiments, the second backplate area 12 can be designed in any area of the whole backplate main body 1 according to actual needs.

In some embodiments, as shown in fig. 2, the second backplane region 12 is connected to the first backplane region 11 by sub-sidewalls 13. The backboard further comprises at least one outlet, the outlet is arranged on the sub-side wall 13, and the display device main board 3 is electrically connected with structures such as a liquid crystal display panel through the outlet. As shown in fig. 4 and fig. 5, in a specific embodiment, two outlets are disposed on the back plate, including a first outlet 102a and a second outlet 102b, wherein the first outlet 102a is disposed on the sub-sidewall 13 located at the ground side of the second back plate region 12, and the second outlet 102b is disposed on the sub-sidewall 13 located at the left side or the right side of the second back plate region 12.

In other embodiments, the back plate further comprises a light shielding sheet. As shown in fig. 2, the light shielding sheet 4 is disposed in the second accommodating cavity 120 and is parallel to the second back plate region 12. The light shielding sheet 4 divides the second accommodating cavity 120 into two parts, wherein the part between the light shielding sheet 4 and the display panel is used for mounting structures such as a light source, an optical film, a reflector and the like; the portion between the light-shielding sheet 4 and the second back plate area 12 is used for mounting the display device main board 3, and the like, that is, the display device main board 3 is disposed between the light-shielding sheet 4 and the second back plate area 12. In this embodiment, the light shielding sheet 4 is black, and shields the light in the second accommodating cavity 120 through the light shielding sheet 4, so as to prevent the light in the second accommodating cavity 120 from being emitted to the outside of the cavity through the outlet.

Optionally, as shown in fig. 2 and 4, an orthographic projection of the light shielding sheet 4 on the back plate coincides with an orthographic projection of the second accommodating cavity 12 on the back plate, that is, in this embodiment, the light shielding sheet 4 has a size large enough to completely cover an area of the second accommodating cavity 12, so that light emitted by the light source can be completely shielded, and the light is prevented from being emitted through the outlet. Alternatively, the respective edges of the light-shielding sheet 4 abut against the sub-side walls 13 or are fixed to the sub-side walls 13.

In some alternative embodiments, as shown in fig. 2, the light source includes a first light bar 61 and a second light bar 62. The first light bar 61 is arranged in the first back plate area 11; the second light bar 62 is disposed on a surface of the light shielding sheet 4 away from the second back plate area 12, and is fixed in the same plane as the first light bar 61, so that the distance from a light source in the whole backlight module to the liquid crystal display panel is the same, and the display effect of the liquid crystal display device is ensured. Optionally, the first light bar 61 and the second light bar 62 are both LED light bars.

In other optional embodiments, a heat dissipation stop strip is further disposed on the back plate. As shown in fig. 2, the heat dissipation stop strip 5 is disposed between the second light bar 62 and the light shielding sheet 4, and the heat dissipation stop strip 5 can prevent the light-dead phenomenon caused by the poor heat dissipation due to the overhigh local temperature due to the suspension of the partial region where the second light bar 62 is located. As shown in fig. 6, a side of the heat dissipation barrier strip 5 facing the second light bar 62 and a side of the first back plate area 11 facing the first light bar 61 are located in the same plane, so as to ensure that light sources in the whole backlight module are located in the same plane, thereby avoiding the influence on the light emitting effect of the liquid crystal display device due to different distances between different light sources and the liquid crystal display panel.

Optionally, as shown in fig. 5, the heat dissipation blocking strip 5 includes a rectangular metal strip, two ends of the heat dissipation blocking strip 5 are mounted on the back plate through screws, and the second light bar 62 is borne by the heat dissipation blocking strip 5. Meanwhile, the width of the heat dissipation stop strip 5 is greater than or equal to the width of the substrate of the second light bar 62, so that the second light bar 62 is prevented from being pressed and overflowing after dispensing.

Based on the same concept, the embodiment of the present disclosure further provides a backlight module corresponding to the back plate in any of the above embodiments. As shown in fig. 7, the backlight module includes a reflective sheet 20, an optical film set 30 disposed on one side of the reflective sheet 20, and the back plate 10 according to any of the embodiments above disposed on the other side of the reflective sheet 20.

The backlight module of the above embodiment includes the corresponding back plate structure in any of the above embodiments, and has the beneficial effects of the corresponding back plate structure embodiment, which are not described herein again.

Based on the same concept, the embodiment of the disclosure further provides a display device corresponding to the backlight module described in any of the above embodiments. As shown in fig. 7, the display device includes a display panel 40 and the backlight module according to the above embodiment.

The display device of the above embodiment includes the structure of the corresponding backlight module in any of the above embodiments, and has the beneficial effects of the corresponding embodiment of the backlight module structure, which are not described herein again.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments can be combined, steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

The embodiments of the present disclosure are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A back plate for a backlight module comprises a back plate main body and a back plate side wall connected with the edge of the back plate main body; the back plate main body includes:

2. The backplane of claim 1, wherein the second backplane region is connected to the first backplane region by a sub-sidewall; the back plate further comprises:

and the at least one outlet is arranged on the sub side wall.

3. The backing sheet of claim 1 further comprising:

4. The back plate of claim 3, wherein an orthographic projection of the louver on the back plate coincides with an orthographic projection of the second receiving cavity on the back plate.

5. The backplate of claim 3, wherein the light source comprises:

the first light bar is arranged in the first back plate area;

6. The backing sheet of claim 5 further comprising:

7. The back plate of claim 6, wherein the heat dissipation stop strip comprises a rectangular metal strip, two ends of the heat dissipation stop strip are mounted on the back plate through screws, and the width of the heat dissipation stop strip is greater than or equal to the width of the second light bar.

8. The backplate of claim 1, wherein the first receiving cavity has a depth of 20-35mm and the second receiving cavity has a depth of 40-55 mm.

9. A backlight module comprising a reflective sheet, an optical film set disposed on one side of the reflective sheet, and the back plate of any one of claims 1-8 disposed on the other side of the reflective sheet.

10. A display device comprising a display panel and the backlight module according to claim 9.