CN110908185A

CN110908185A - Backlight module and liquid crystal display device

Info

Publication number: CN110908185A
Application number: CN201911164210.3A
Authority: CN
Inventors: 丘永元; 付琳琳; 罗聪; 程希
Original assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Current assignee: Huizhou China Star Optoelectronics Technology Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-03-24
Also published as: WO2021103230A1

Abstract

A backlight module and a liquid crystal display device respectively comprise a substrate, a plurality of light-emitting elements, a diffusion plate, a plurality of fixing pieces and a plurality of supporting seats. The fixing pieces are arranged on the surface of the diffusion plate facing the base plate in a protruding mode at intervals. The supporting seats are convexly arranged on the surface of the base plate corresponding to the fixing pieces and respectively comprise fixing grooves for fixedly connecting the corresponding fixing pieces, so that the diffusion plate is supported on the supporting seats. The backlight module and the liquid crystal display device can effectively ensure the distance height between the diffusion plate and the substrate provided with the light-emitting element, improve the contraposition of the supporting structure and the light-emitting element, strengthen the stability of structure assembly and improve the light-emitting effect.

Description

Backlight module and liquid crystal display device

[ technical field ] A method for producing a semiconductor device

The present disclosure relates to display technologies, and particularly to a backlight module and a liquid crystal display device.

[ background of the invention ]

Liquid Crystal Displays (LCDs) are widely used in electronic display devices such as computers, mobile phones, and liquid crystal televisions because of their advantages such as being light, thin, low in power consumption, and low in ambient light. Generally, a liquid crystal display mainly includes a backlight module, a liquid crystal panel and a driving circuit.

At present, the industry applies the micro light emitting diode as a backlight source to the liquid crystal display to realize the characteristics of ultra-thinness, high brightness, multi-partition and the like. However, the light-emitting characteristics of the limited light-emitting diodes (LEDs) are low in light-emitting density (OD) and the light-emitting brightness of the LED is increased by considering a large number of LEDs, so that the pitch (pitch) between the LEDs is difficult to increase, which results in high cost. In order to reduce the production cost, the distance between the LEDs must be increased to reduce the number of LEDs, but the light emitting effect must be considered at the same time, so that the adoption of diffuser (diffuser plate) printing is a scheme for effectively increasing the distance, but the technical scheme needs to ensure that the DP printing area and the LEDs have high alignment, thereby avoiding the problem of taste. On the other hand, although the distance is increased to some extent, it is still insufficient compared with the common direct type product. In addition, the conventional supporting scheme cannot be adopted because the space for placing the supporter between the diffusion plate and the back plate is small.

[ summary of the invention ]

An object of the present application is to provide a backlight module and a liquid crystal display device, which have a supporting structure, can effectively ensure the distance between a diffusion plate and a substrate provided with a light emitting element, and can improve the alignment between the supporting structure and the light emitting element, enhance the stability of the structure assembly, and improve the light emitting effect.

To achieve the above object, the present application provides a backplane module, comprising a substrate; a plurality of light emitting elements arranged on the substrate at intervals; the diffusion plate is arranged opposite to and spaced from the substrate; the fixing pieces are arranged on the surface, facing the base plate, of the diffusion plate at intervals, and each fixing piece extends towards the direction of the base plate by a first distance; and the supporting seats are arranged on the surface of the base plate corresponding to the fixing pieces, each supporting seat extends for a second distance towards the direction of the diffusion plate, and each supporting seat comprises a fixing groove, and one end of each fixing seat, which is far away from the base plate, is opened outwards and is used for fixedly connecting the corresponding fixing piece, so that the diffusion plate is supported on the supporting seats.

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

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

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

Furthermore, a butt-joint layer is defined on the surface of the substrate, the plurality of supporting seats are arranged on the butt-joint layer, and the butt-joint layer surrounds the plurality of light-emitting elements.

Furthermore, the butt joint layer on the substrate is made of resin materials and comprises silicon resin or silica gel, and the butt joint layer forms the plurality of supporting seats in a printing or die forming mode.

Further, the support seat includes a support surface surrounding the fixing groove and parallel to a surface of the diffusion plate facing the substrate.

Furthermore, each fixing member extends a first distance in a direction toward the substrate, and each supporting seat extends a second distance in a direction toward the diffuser plate, wherein the second distance is equal to or greater than the first distance.

Further, the plurality of fixing pieces respectively have one of cylindrical, conical, truncated pyramid or pyramid configurations.

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

This application backlight unit and liquid crystal display device utilize the diffuser plate outstanding mounting downwards and the butt joint of the supporting seat that the base plate corresponds fixed, make the diffuser plate stabilize support in on the base plate, especially the mounting is with roll extrusion mode integrated into one piece, just the supporting seat is with printing or mould mode integrated into one piece, and have the holding the fixed slot of mounting can promote by a wide margin the mounting with structural strength after the supporting seat combines, the luminous element interval of the emitting diode of effectively solving traditional lamp plate can't effectively increase, therefore can't reduce luminous element's quantity and reach reduce cost's purpose to it is not good to improve traditional diffuser plate and base plate counterpoint the degree of accuracy, influences the shortcoming of light-emitting effect easily, more can satisfy the required high demand of optical density.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a backlight module according to an embodiment of the present disclosure.

Fig. 2 is a structural assembly diagram of the backlight module shown in 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.

[ detailed description ] embodiments

The following description of the various embodiments refers to the accompanying drawings, which illustrate specific embodiments that can be used to practice the present application. In the present application, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", and the like are merely referring to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting.

The present application provides a backlight module, and more particularly to a backlight module suitable for a direct-type light emitting diode liquid crystal display. Fig. 1 is an exploded view of a backlight module according to an embodiment of the present disclosure. 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 supporting bases 5. The substrate 2 is a circuit substrate, and the light emitting elements 4 are electrically connected to the substrate 2. In this embodiment, the light emitting elements 4 may be micro light-emitting diodes (mini LEDs), which are disposed on the substrate 2 at intervals, but not limited thereto.

As shown in fig. 1, the diffusion plate 3 is 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 elements 31, which are spaced apart from each other. Specifically, the surface 30 of the diffuser plate 3 is made of Polystyrene (PS) or methylmethacrylate/styrene copolymer (MS), and the fixing members 31 are integrally formed by rolling. After being formed in a rolling manner, each fixing member 5 extends a first distance towards the substrate 2, wherein the manner of integrally forming the plurality of fixing members 31 in a rolling manner is a one-step forming process, so that the conventional process of manufacturing elements in a grading manner can be reduced. However, in another embodiment, the surface 30 of the diffuser plate 3 may be made of uv curable glue or silicone. That is, a layer of uv-curable adhesive is coated on the surface 30 of the diffuser plate 3, and then the uv-curable adhesive is continuously irradiated by uv light for a unit time to be cured and molded, that is, a secondary molding process is performed, and the plurality of fixing members 31 can be formed by a general method. In this example, the fixing member 31 has a cylindrical configuration. In addition, the other side of the diffusion plate 3 opposite to the surface 30 is provided with an optical film 32 for optically improving the light diffused by the diffusion plate 3, further improving the brightness of the backlight module and forming more uniform brightness.

Please refer to fig. 1. The surface of the substrate 2 defines a docking layer 50, which is disposed around the plurality of light emitting elements 4. The supporting bases 5 are disposed on the abutting layer 50, that is, the supporting bases 5 are disposed on the surface of the substrate 2 corresponding to the fixing elements 31 and located between the light emitting elements 4. In the preferred embodiment, the butt-joint layer 50 is disposed along the whole surface of the substrate 2, but may be partially disposed between the adjacent light-emitting elements 4 according to actual requirements, rather than being disposed on the whole surface. Specifically, the butt-joint layer 50 on the substrate 2 is made of a resin material, and includes silicone resin or silicone, and the butt-joint layer 50 is formed by printing or molding the plurality of support bases 5. As shown in fig. 1, each of the support bases 5 extends a second distance toward the diffuser plate 3, and includes a fixing groove 51 and a support surface 52, wherein an end of the fixing groove 51 away from the substrate 2 is open, and the support surface 52 surrounds the open end of the fixing groove 51 and is parallel to the surface of the diffuser plate 3 facing the substrate 2. In other words, the docking layer 50 and the substrate 2 together form a lamp panel having the light emitting elements 4.

Fig. 2 is a structural assembly diagram of the backlight module shown in fig. 1. Please refer to fig. 2 and fig. 1. The plurality of support bases 5 are provided for positioning and fixing the fixing member 31 so that the diffusion plate 3 is supported on the base plate 2 while maintaining a predetermined height interval from the base plate 2. As shown in fig. 2, the fixing members 31 of the diffusion plate 3 are fixedly connected to the fixing grooves 51 of the supporting seats 5 on the base plate 2 in an inserting manner, so that the diffusion plate 3 is supported on the supporting seats 5 on the base plate 2. In addition, after the assembly is completed, the diffusion plate 3 and the substrate 2 may be further stably combined by heating for a predetermined time or by aging of material properties. Specifically, the second distance of the support seat 5 is equal to or greater than the first distance of the fixing element 31, so that the whole fixing element 31 can be completely embedded in the fixing groove 51, the surface of the fixing element 31 is completely covered and fixed by the fixing groove 51, and the support surface 52 of the support seat 5 is flatly attached to the surface 30 of the diffuser plate 3, thereby further ensuring the stability of assembly and the maintenance of the height between the diffuser plate 3 and the substrate 2. Consequently, this application backlight unit 1 the mounting 31 with the structure that slimming and optical density are little is particularly suitable for to the cooperation of supporting seat 5 to can guarantee the counterpoint nature of diffuser plate and lamp plate, realize the required high demand of optical density.

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 fixing members 31 may also be in a cone, frustum or pyramid configuration, which can increase the contact area between the fixing members 31 and the fixing grooves 51, thereby improving the stability of the structure 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 further 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), and the detailed structure thereof 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 present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the scope of the present application, so that the scope of the present application shall be determined by the appended claims.

Claims

1. A backlight module, comprising:

a substrate;

a plurality of light emitting elements arranged on the substrate at intervals;

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

the fixing pieces are arranged on the surface, facing the base plate, of the diffusion plate in a protruding mode at intervals; and

the supporting seats are convexly arranged on the surface of the base plate corresponding to the fixing pieces, each supporting seat comprises a fixing groove, and one end, far away from the base plate, of each fixing groove is arranged outside and is used for being fixedly connected with the corresponding fixing piece, so that the diffusion plate is supported on the supporting seats.

2. The backlight module of claim 1, wherein the surface of the diffuser plate facing the substrate comprises polystyrene or methylmethacrylate/styrene copolymer.

3. The backlight module of claim 1, wherein the material of the surface of the diffusion plate facing the substrate comprises uv curable glue or silicone.

4. The backlight module according to claim 1, wherein the surface of the diffusion plate facing the substrate is integrally formed with the plurality of fixing members by rolling.

5. The backlight module as claimed in claim 1, wherein the substrate has a surface defining a docking layer, the plurality of supporting bases are disposed on the docking layer, and the docking layer surrounds the plurality of light emitting elements.

6. The backlight module as claimed in claim 5, wherein the butt-joint layer on the substrate is made of resin material including silicone or silicone, and the butt-joint layer forms the plurality of supporting bases by printing or molding.

7. The backlight module of claim 1, wherein the support base comprises a support surface surrounding the fixing groove and parallel to a surface of the diffusion plate facing the substrate.

8. The backlight module of claim 1, wherein each of the fixing members extends a first distance in a direction toward the substrate, and each of the supporting bases extends a second distance in a direction toward the diffuser plate, wherein the second distance is equal to or greater than the first distance.

9. The backlight module of claim 1, wherein the plurality of fixing members have a configuration of one of a cylinder type, a cone type, a truncated pyramid type, or a pyramid type.

10. A liquid crystal display device, comprising a liquid crystal panel and the backlight module of any one of claims 1 to 9.