WO2021103230A1

WO2021103230A1 - Backlight module and liquid crystal display device

Info

Publication number: WO2021103230A1
Application number: PCT/CN2019/127686
Authority: WO
Inventors: 丘永元; 付琳琳; 罗聪; 程希
Original assignee: 惠州市华星光电技术有限公司
Priority date: 2019-11-25
Filing date: 2019-12-24
Publication date: 2021-06-03
Also published as: CN110908185A

Abstract

A backlight module (1) and a liquid crystal display device (10), each comprising: a substrate (2), a plurality of light-emitting elements (4), a diffusion plate (3), a plurality of fixing members (31) and a plurality of supporting seats (5). The plurality of fixing members (31) are protrudingly arranged at intervals on the surface (30) of the diffusion plate (3) facing the substrate (2). The plurality of supporting seats (5) are protrudingly arranged on the surface of the substrate (2) in a manner of corresponding to the plurality of fixing members (31), and each includes a fixing groove (51) for fixing and connecting the corresponding fixing members (31) so that the diffusion plate (3) is supported on the plurality of supporting seats (5). The backlight module (1) and the liquid crystal display device (10) can effectively guarantee the height distance between the diffusion plate (3) and the substrate (2) provided with the light-emitting elements (4), improve the on-position effect of a support structure and the light-emitting elements (4), strengthen the assembling stability of the structure, and improve luminous effect.

Description

Backlight module and liquid crystal display device

Technical field

This application relates to the field of display technology, in particular to a backlight module and a liquid crystal display device.

Background technique

Liquid crystal display (LCD) is widely used in electronic display devices such as computers, mobile phones, and LCD TVs due to its advantages of lightness, thinness, low power consumption, and low radiation. Generally speaking, a liquid crystal display mainly includes a backlight module, a liquid crystal panel, and a driving circuit.

At present, the industry uses miniature light-emitting diodes as a backlight source in liquid crystal displays to achieve ultra-thin, high-brightness, and multi-zone features. However, limited light-emitting diode (light-emitting diode, The light-emitting characteristics of LEDs, when the thin design, that is, the optical density (optical density, OD) is small, and a larger number of LEDs must be considered to improve the luminous brightness, the pitch between the LEDs will inevitably be difficult to increase. Large, leading to high costs. In order to reduce production costs, the spacing of LEDs must be increased to reduce the number of LEDs, but at the same time the luminous effect must be taken into account. Therefore, the use of diffuser plate printing is a solution to effectively increase the spacing. However, this technical solution needs to ensure the DP printing area It has high alignment with LEDs to avoid taste problems. On the other hand, although the spacing is increased to a certain extent, it is still insufficient compared to ordinary direct-type products. In addition, due to the small placement space of the support between the diffuser plate and the back plate, the traditional support solution cannot be adopted.

technical problem

The purpose of this application is to provide a backlight module and a liquid crystal display device, which have a supporting structure, which can effectively ensure the height of the distance between the diffuser plate and the substrate provided with the light-emitting element, and improve the alignment of the supporting structure and the light-emitting element Performance, strengthen the stability of the structure assembly, and enhance the luminous effect.

Technical solutions

In order to achieve the above object, the present application provides a backplane module, including a substrate; a plurality of light-emitting elements are arranged on the substrate at intervals; a diffuser plate is arranged opposite and spaced apart from the substrate; and a plurality of fixing members are mutually arranged. Are arranged at intervals on the surface of the diffuser plate facing the substrate, and each of the fixing elements extends a first distance in the direction of the substrate; and a plurality of supporting seats corresponding to the plurality of fixing elements are arranged on the On the surface of the substrate, and each of the support bases extends a second distance in the direction of the diffuser, and includes a fixing groove, one end of which is far away from the substrate is open to the outside, and is used to fixedly connect the corresponding fixing member , So that the diffuser plate is supported on the plurality of support seats.

Further, the material of the surface of the diffusion plate facing the substrate includes polystyrene or methyl methacrylate/styrene copolymer.

Further, the material of the surface of the diffusion plate facing the substrate includes ultraviolet curing glue or silicone resin.

Further, the surface of the diffuser plate facing the substrate is integrally formed with the plurality of fixing members in a rolling manner.

Further, a docking layer is defined on the surface of the substrate, the plurality of support seats are arranged on the docking layer, and the docking layer is arranged around the plurality of light-emitting elements.

Further, the docking layer on the substrate is made of a resin material, which includes silicone resin or silica gel, and the docking layer is printed or molded to form the plurality of support seats.

Further, the support seat includes a support surface that surrounds the fixing groove and is parallel to a surface of the diffuser plate facing the substrate.

Further, each of the fixing members extends a first distance in the direction of the substrate, and each support seat extends a second distance in the direction of the diffuser, wherein the second distance is equal to or greater than the The first distance.

Further, the plurality of fixing members respectively have a configuration of one of a cylindrical shape, a conical shape, a truncated cone shape, or a pyramid shape.

The present application further provides a liquid crystal display device, which includes a liquid crystal panel and the backlight module of any one of the foregoing embodiments.

The present application additionally provides a backplane module, including a substrate; a plurality of light-emitting elements are arranged on the substrate at intervals; a diffuser plate is arranged opposite and spaced apart from the substrate; an optical film is arranged on the diffuser plate On; a plurality of fixing members, mutually spaced protruding on the surface of the diffuser facing the substrate; and a plurality of support seats, corresponding to the plurality of fixing members protruding on the surface of the substrate, and each The support base includes a fixing groove, and one end of the fixing groove away from the base plate is opened to the outside to be fixedly connected to the corresponding fixing member so that the diffuser plate is supported on the plurality of support bases; The supporting seat includes a supporting surface that surrounds the fixing groove and is parallel to the surface of the diffuser plate facing the substrate.

Beneficial effect

The backlight module and the liquid crystal display device of the present application utilize the fixing member protruding downward of the diffuser plate and the supporting base corresponding to the substrate to be fixed by butting, so that the diffuser plate is stably supported on the substrate, especially the fixing member is rolled It is integrally formed, and the support base is integrally formed by printing or mold, and has a fixing groove for accommodating the fixing part, which can greatly improve the structural strength of the fixing part and the support base after being combined, and effectively solve the problem of traditional lamp The distance between the light-emitting elements of the light-emitting diodes of the board cannot be effectively increased, so the number of light-emitting elements cannot be reduced to achieve the purpose of reducing costs, and to improve the traditional diffusion plate and the substrate. The height required for optical density.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is an exploded schematic diagram of the structure of a backlight module according to an embodiment of the present application.

FIG. 2 is a schematic diagram of the structure combination of the backlight module of FIG. 1.

FIG. 3 is a schematic structural diagram of a backlight module according to another embodiment of the present application.

FIG. 4 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application.

Embodiments of the present invention

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments that can be implemented in the present application. The directional terms mentioned in this application, such as "up", "down", "front", "rear", "left", "right", "in", "out", "side", etc., are for reference only The direction of the additional schema. Therefore, the directional terms used are used to illustrate and understand the application, rather than to limit the application.

The present application provides a backlight module, in particular to a backlight module suitable for a direct type light emitting diode liquid crystal display. FIG. 1 is an exploded schematic diagram of the structure of a backlight module according to an embodiment of the present application. The backlight module 1 of the present application includes a substrate 2, a diffusion plate 3, a plurality of light-emitting elements 4 and a plurality of support seats 5. The substrate 2 is a circuit substrate, and the plurality of light-emitting elements 4 are electrically connected to the substrate 2. In this embodiment, the plurality of light-emitting elements 4 may be mini light-emitting diodes (mini light-emitting diodes). diode, mini LED), which are arranged on the substrate 2 at intervals, but not limited to this.

As shown in FIG. 1, the diffuser plate 3 is relatively disposed above the substrate 2. In particular, the surface 30 of the diffuser plate 3 facing the base plate 2 is provided with a plurality of fixing members 31 which are arranged at intervals. Specifically, the surface 30 of the diffusion plate 3 is made of polystyrene (PS) or methyl methacrylate/styrene copolymer (methylmetahacrylate styrene, MS), and is integrally formed by rolling. Mentioned multiple fixing members 31. After each of the fixing members 5 is formed in a rolling manner, they respectively extend a first distance in the direction of the substrate 2, wherein the method of integrally forming the plurality of fixing members 31 by the rolling is a one-time molding process, which can be Reduce the traditional step-by-step production of components. However, in another specific implementation, the surface 30 of the diffusion plate 3 may be made of ultraviolet curable glue or silicone resin. That is, a layer of ultraviolet light curable adhesive is coated on the surface 30 of the diffusion plate 3, and the ultraviolet light is continuously irradiated on it for a unit time to cure the ultraviolet light curable adhesive, which is a secondary molding process. In general, the plurality of fixing members 31 can be formed. In this example, the fixing member 31 has a cylindrical configuration. In addition, the diffuser plate 3 is provided with an optical film 32 on the other side of the surface 30 to optically improve the light diffused by the diffuser plate 3 to further improve the brightness of the backlight module, and Form a more uniform brightness.

Please refer to Figure 1 for continuation. A docking layer 50 is defined on the surface of the substrate 2, which is arranged around the plurality of light-emitting elements 4. The plurality of support bases 5 are provided on the docking layer 50, that is, the plurality of support bases 5 are provided on the surface of the substrate 2 corresponding to the plurality of fixing members 31, and are located on the light-emitting element Between 4. In this preferred embodiment, the docking layer 50 is arranged along the entire surface of the substrate 2, but it can also be partially arranged between adjacent light-emitting elements 4 instead of the entire surface according to actual requirements. Specifically, the docking layer 50 on the substrate 2 is made of a resin material, which includes silicone resin or silica gel, and the docking layer 50 is printed or molded to form the plurality of support seats 5. As shown in FIG. 1, each support seat 5 extends a second distance in the direction of the diffuser plate 3, and includes a fixing groove 51 and a supporting surface 52, wherein the fixing groove 51 is open at one end away from the substrate 2 The supporting surface 52 surrounds the open end of the fixing groove 51 and is parallel to the surface of the diffusion plate 3 facing the substrate 2. In other words, the docking layer 50 and the substrate 2 together form a light board with the plurality of light-emitting elements 4.

FIG. 2 is a schematic diagram of the structure combination of the backlight module of FIG. 1. Please refer to Figure 2 and Figure 1. The purpose of the plurality of supporting seats 5 is to position and fix the fixing member 31 so that the diffuser plate 3 is supported on the base plate 2 and maintains a predetermined height interval from the base plate 2. As shown in FIG. 2, the plurality of fixing members 31 of the diffuser plate 3 are fixedly connected to the fixing grooves 51 of the plurality of support seats 5 on the substrate 2 in an inserting manner, so that the diffuser plate 3 is supported on the substrate 2 on a plurality of support seats 5 on. In addition, after the assembly is completed, the diffusion plate 3 and the substrate 2 can also be heated for a predetermined period of time, or through the aging of material properties, to further stabilize the structure combination. In particular, the second distance of the support base 5 is equal to or greater than the first distance of the fixing member 31, so that the entire fixing member 31 can be completely buried in the fixing groove 51 to ensure the The surface of the fixing member 31 is completely covered and fixed by the fixing groove 51, and the supporting surface 52 of the supporting seat 5 is flatly attached to the surface 30 of the diffuser plate 3 to further ensure the stability of the assembly and the stability of the diffuser plate 3 and The height between the substrates 2 is maintained. Therefore, the cooperation between the fixing member 31 of the backlight module 1 of the present application and the support base 5 is particularly suitable for thinning and low-density structures, and can ensure the alignment of the diffuser plate and the lamp board, and realize the optical density. The required height demand.

FIG. 3 is a schematic structural diagram of a backlight module according to another embodiment of the present application. As shown in FIG. 3, the plurality of fixing members 31 may also be in a conical, truncated, or pyramid-shaped configuration, which can increase the contact area between the fixing member 31 and the fixing groove 51, thereby improving the structure Stable assembly.

FIG. 4 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present application. The present application additionally provides a liquid crystal display device 10, which includes a liquid crystal panel 100 and the backlight module 1 of any of the foregoing embodiments. Specifically, the liquid crystal panel 100 includes an array substrate 101, a liquid crystal layer 102, and a color filter substrate 103 (as shown in FIG. 4). The detailed structure is the same as that of a general liquid crystal panel, and will not be repeated here. In addition, the liquid crystal display device 10 of the present application further includes a back frame 6 for supporting and fixing the backlight module 1 and the liquid crystal display device 10.

In summary, although the application has been disclosed as above in preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the application. Those of ordinary skill in the art can make various modifications without departing from the scope of the application. Therefore, the protection scope of this application is subject to the scope defined by the claims.

Claims

A backlight module includes:

Substrate

A plurality of light-emitting elements are arranged on the substrate at intervals;

The diffusion plate is arranged opposite to and spaced apart from the substrate;

A plurality of fixing members are arranged on the surface of the diffuser plate facing the substrate at intervals and protruding from each other; and

A plurality of supporting seats corresponding to the plurality of fixing members are protrudingly provided on the surface of the substrate, and each of the supporting seats includes a fixing groove, and one end of the fixing groove away from the substrate is opened to the outside for fixing The corresponding fixing parts are connected, so that the diffuser plate is supported on the plurality of support seats.
The backlight module of claim 1, wherein the material of the surface of the diffusion plate facing the substrate comprises polystyrene or methyl methacrylate/styrene copolymer.
3. The backlight module of claim 1, wherein the material of the surface of the diffuser plate facing the substrate comprises ultraviolet curing glue or silicone resin.
3. The backlight module of claim 1, wherein the surface of the diffuser plate facing the substrate is integrally formed with the plurality of fixing members in a rolling manner.
3. The backlight module of claim 1, wherein a docking layer is defined on the surface of the substrate, the plurality of support seats are disposed on the docking layer, and the docking layer is disposed around the plurality of light-emitting elements.
The backlight module of claim 5, wherein the docking layer on the substrate is made of resin material, which includes silicone resin or silica gel, and the docking layer is printed or molded to form the plurality of support seats .
3. The backlight module of claim 1, wherein the support base comprises a support surface, the support surface surrounds the fixing groove and is parallel to a surface of the diffuser plate facing the substrate.
5. The backlight module of claim 1, wherein each of the fixing members extends a first distance in the direction of the substrate, each of the supporting seats extends a second distance in the direction of the diffuser, and the The second distance is equal to or greater than the first distance.
3. The backlight module of claim 1, wherein the plurality of fixing members have a configuration of one of a cylindrical shape, a conical shape, a pyramid shape, or a pyramid shape.
A liquid crystal display device, comprising a liquid crystal panel and the backlight module of claim 1.
A backlight module includes:

Substrate

A plurality of light-emitting elements are arranged on the substrate at intervals;

The diffusion plate is arranged opposite to and spaced apart from the substrate;

The optical film is arranged on the diffuser plate;

A plurality of fixing members are arranged on the surface of the diffuser plate facing the substrate at intervals and protruding from each other; and

A plurality of supporting seats corresponding to the plurality of fixing members are protrudingly provided on the surface of the substrate, and each of the supporting seats includes a fixing groove, and one end of the fixing groove away from the substrate is opened to the outside for fixing Connect the corresponding fixing parts so that the diffuser plate is supported on the plurality of support seats;

The supporting seat includes a supporting surface, the supporting surface surrounds the fixing groove and is parallel to the surface of the diffuser plate facing the substrate.
11. The backlight module of claim 11, wherein the surface of the diffuser plate facing the substrate is integrally formed with the plurality of fixing members in a rolling manner.
11. The backlight module of claim 11, wherein a docking layer is defined on the surface of the substrate, the plurality of support seats are disposed on the docking layer, and the docking layer is disposed around the plurality of light-emitting elements.
The backlight module of claim 13, wherein the docking layer on the substrate is made of a resin material, which includes silicone or silica gel, and the docking layer is printed or molded to form the plurality of support seats .
11. The backlight module of claim 11, wherein each of the fixing members extends a first distance in the direction of the substrate, each of the supporting seats extends a second distance in the direction of the diffuser, and the The second distance is equal to or greater than the first distance.