CN220872838U

CN220872838U - Backlight module and display device

Info

Publication number: CN220872838U
Application number: CN202322456650.4U
Authority: CN
Inventors: 刘静; 孙雄; 黎芳群
Original assignee: Huizhou Shiwei New Technology Co Ltd
Current assignee: Huizhou Shiwei New Technology Co Ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2024-04-30
Anticipated expiration: 2033-09-08

Abstract

The embodiment of the application provides a backlight module and a display device, wherein the backlight module comprises: the lamp panel is used for bearing the lamp beads; the lamp beads are arranged on the lamp panel at intervals; the light source comprises a lamp panel, a plurality of optical structures, a plurality of light source modules and a plurality of light source modules, wherein the plurality of optical structures are arranged on the lamp panel, each optical structure is provided with an optical hole, and each optical hole correspondingly accommodates one lamp bead so as to limit the divergence angle of light emitted by the lamp bead. By arranging an optical structure corresponding to each lamp bead, the optical holes of the optical structures can limit the diffusion angle of light emitted by the lamp beads, namely limit the light source with larger partial light angle, thereby reducing the occurrence of halation phenomenon and improving the display uniformity of the display device.

Description

Backlight module and display device

Technical Field

The application belongs to the technical field of display, and particularly relates to a backlight module and a display device.

Background

The liquid crystal display device with the lamp beads as the backlight source adopts a huge amount of lamp beads and has the addition of the Local Dimming (Local Dimming) technology, so that the display effect of the display device is obviously improved compared with that of a direct type (DLED) and a side-in type (ELED).

However, the display device in the related art has a clear display halo, which easily causes a phenomenon of uneven display.

Disclosure of utility model

The embodiment of the application provides a backlight module and a display device, which are used for reducing the halation phenomenon of the display device and further improving the display uniformity.

In a first aspect, an embodiment of the present application provides a backlight module, including:

the lamp panel is used for bearing the lamp beads;

The lamp beads are arranged on the lamp panel at intervals;

The light source comprises a lamp panel, a plurality of optical structures, a plurality of light source modules and a plurality of light source modules, wherein the plurality of optical structures are arranged on the lamp panel, each optical structure is provided with an optical hole, and each optical hole correspondingly accommodates one lamp bead so as to limit the divergence angle of light emitted by the lamp bead.

Optionally, each optical hole is inclined towards the side wall of the lamp bead relative to the lamp panel, and the diameter of the optical hole near one end of the lamp panel is smaller than the diameter of the optical hole far away from one end of the lamp panel.

Optionally, the backlight module further includes:

The connecting plate is arranged on the lamp panel and is connected with the optical structures.

Optionally, the connection plate and the plurality of optical structures are integrally formed.

Optionally, the height of any of the optical structures is greater than the height of the connection plate.

Optionally, the backlight module further includes:

The support column is arranged on one side, away from the lamp panel, of the connecting plate and is spaced from the optical structure.

Optionally, the support column and the connecting plate are integrally formed; and/or

The support posts have a height greater than the height of the optical structure.

Optionally, each of the optical structures has a square shape; and/or

The backlight module further comprises a plurality of lenses, wherein each lens is respectively arranged in one optical hole and covers one lamp bead.

Optionally, a white ink is disposed on a side of each optical structure facing away from the light panel, and a reflectivity of the white ink is greater than 80%.

In a second aspect, an embodiment of the present application further provides a display apparatus, including:

The backlight module according to any one of the above claims;

And the display screen is arranged on the backlight module.

In the backlight module and the display device provided by the embodiment of the application, the optical structure is correspondingly arranged on each lamp bead, and the optical hole of the optical structure can limit the diffusion angle of light emitted by the lamp bead, namely limit the light source with larger partial light angle, so that the occurrence of the halation phenomenon can be reduced, and the display uniformity of the display device is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art.

For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the application.

Fig. 3 is a schematic structural diagram of a first angle of a lamp panel and a lens in a backlight module according to an embodiment of the application.

Fig. 4 is a schematic structural diagram of a second angle of a lamp panel and a lens in a backlight module according to an embodiment of the application.

Fig. 5 is a schematic structural diagram of a first angle of a connection board, an optical structure and a support column in a backlight module according to an embodiment of the application.

Fig. 6 is a schematic structural diagram of a second angle of the connection board, the optical structure and the support column in the backlight module according to the embodiment of the application.

Fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the application. The embodiment of the application provides a display device 1, wherein the display device 1 can be a device with a display function such as a television, a computer, a vehicle-mounted video device and the like. The display apparatus 1 includes a housing 10 and a display device 20. The housing 10 is used for carrying the display device 20, or the housing 10 is a packaging structure of the display device 20, so as to hide the circuit of the display device 20 and the like, thereby improving the aesthetic degree of the display apparatus 1.

The display device 20 is an essential component of the display apparatus 1. The display device 20 may include a backlight module and a display screen (not shown), where the backlight module provides support and a backlight source for the display screen, so that the display device 20 performs a picture display under a preset program for a user to watch. The embodiments of the present application will be described with reference to a liquid crystal display using a liquid crystal solution of two sheets of polarizing material, with the crystals being rearranged for imaging purposes when current is passed through the liquid. The lcd requires a backlight, i.e., a fluorescent tube, to project light sources that pass through a polarizer and then through the liquid crystal, and the arrangement of the liquid crystal molecules changes the angle of light passing through the liquid crystal. These rays then pass through the front colored filter and another polarizer. Therefore, the intensity and color of the light finally appearing can be controlled by changing the voltage value of the stimulated liquid crystal, and the color combination with different shades can be changed on the liquid crystal display device.

The liquid crystal display device generally needs a backlight source, and the lamp beads are used as the backlight source, so that the display effect of the display device is obviously improved compared with that of direct light type (DLED) and side-in type (ELED) due to the fact that a huge amount of lamp beads are adopted and the Local Dimming technology is adopted.

In order to reduce the occurrence of the above-mentioned situation, the embodiment of the present application improves the configuration of the backlight module in the display device 20, and will be described with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the application. The backlight module 200 includes a lamp panel 21, a plurality of lamp beads 22, and a plurality of optical structures 23.

Referring to fig. 3 and 4 in conjunction with fig. 1 and 2, fig. 3 is a schematic structural view of a first angle of a lamp panel and a lens in a backlight module according to an embodiment of the application, and fig. 4 is a schematic structural view of a second angle of the lamp panel and the lens in the backlight module according to the embodiment of the application. The lamp panel 21 may also be referred to as a circuit board, where the lamp panel 21 is used for carrying the lamp beads 22, and can realize electrical connection between different lamp beads 22, so as to conveniently realize light emission control of the lamp beads 22.

The light beads 22 are backlight sources of the display device 20, and the plurality of light beads 22 can be arranged at intervals, for example, in an array on the light panel 21, so as to realize uniform light emission in different areas of the display device 20. The distance between the beads 22 may be set as desired, and is not particularly limited herein. The beads 22 may be Mini LED beads, and the size is in the range of 75 micrometers to 300 micrometers, so that the resolution of the display device 20 can be improved by correspondingly setting the beads 22 for each pixel.

The optical structures 23 are arranged in a one-to-one correspondence with the lamp beads 22, each optical structure 23 is arranged on the lamp panel 21, each optical structure 23 is provided with an optical hole 230, a limiting groove is formed around the optical structure and the lamp panel 21, and each limiting groove or the optical hole 230 respectively accommodates one lamp bead 22 to limit the divergence angle of light emitted by the lamp bead 22.

It can be understood that each optical structure 23 is provided with a through hole, that is, an optical hole 230, and the optical structures 23 are disposed on the lamp panel 21, and the side walls of the through holes and the lamp panel 21 enclose a limit groove, and the shape of the limit groove is mainly determined by the shape of the optical hole 230 of the optical structure 23. The sidewalls of the optical holes 230 block the light of a large angle, which can reduce the divergence of the light of a large angle, thereby reducing the generation of halation.

In the backlight module 200 and the display device 20 provided in the embodiments of the present application, by correspondingly providing one optical structure 23 for each lamp bead 22, the optical hole 230 of the optical structure 23 can limit the diffusion angle of the light emitted by the lamp bead 22, that is, limit the light source with a larger partial light angle, thereby reducing the occurrence of the halation phenomenon and improving the uniformity of the display device 20.

Illustratively, the optical hole 230 of each optical structure 23 is disposed obliquely to the lamp panel 21 toward the sidewall of the lamp bead 22, i.e., the inner sidewall of the optical hole 230 is disposed obliquely, and the diameter of the end of the optical hole 230 near the lamp panel 21 is smaller than the diameter of the end of the optical hole 230 away from the lamp panel 21. It is understood that the inner side of the optical structure 23 may be formed in a cup shape or a bowl shape, and the inner side wall of the optical structure 23 may be curved to adjust the outgoing angle of the light. Wherein, the diameter of the end of the optical hole 230 near the lamp panel 21 is larger than the size of the lamp bead 22 to accommodate the lamp bead 22, and can provide a basis for adjusting the angle of the optical structure 23.

Referring to fig. 1 to 4 in combination with fig. 5 and fig. 6, fig. 5 is a schematic structural view of a first angle of a connection board, an optical structure and a support column in a backlight module according to an embodiment of the present application, and fig. 6 is a schematic structural view of a second angle of the connection board, the optical structure and the support column in the backlight module according to the embodiment of the present application. The shape or appearance of the optical structure 23 may be square, and compared with the optical structure which is cylindrical, the occupied space of the optical structure 23 can be reduced, so that the arrangement number of the lamp beads 22 is not affected.

The backlight module 200 further includes a plurality of lenses 24, where the plurality of lenses 24 are disposed in a one-to-one correspondence with the plurality of lamp beads 22, for example, each lens 24 is disposed in one of the optical holes 230 and covers one of the lamp beads 22. The lens 24 is used for adjusting the light emitted by the lamp beads 22, for example, the light can be diffused to have a light angle, which is beneficial to improving the brightness of the backlight source.

The side of each optical structure 23 facing away from the lamp panel 21 is sprayed with white ink (not shown), that is, the wall of the optical hole 230 and the side wall of the optical structure 23 facing away from the lamp panel 21 are sprayed with white ink, and the reflectivity of the white ink is greater than 80%, so that the light emitted by the lamp beads 22 can be reflected, and the light emitting efficiency is improved.

The backlight module 200 further includes a connection plate 25, and the connection plate 25 is disposed on the lamp panel 21 and connected to the plurality of optical structures 23. It will be appreciated that the connection board 25 is used to connect the plurality of optical structures 23, and that the connection board 25 may be integrally formed with the plurality of optical structures 23, so as to facilitate manufacturing of the optical structures 23 and positioning and mounting of the optical structures 23.

In the mounting process, the whole body formed by the connecting plate 25 and the optical structure 23 can be attached to the lamp panel 21, and the optical holes 230 of the optical structure 23 are in one-to-one correspondence with the lamp beads 22, so that the mounting of the connecting plate 25 and the optical structure 23 can be completed.

The materials of the connection plate 25 and the optical structure 23 are the same, for example, PC (linear carbonate) base material or MS (silane modified polyether sealant) material can be used. White ink can be sprayed on the side, away from the lamp panel 21, of the connecting plate 25 and the optical structure 23, so that the reflectivity of the light source is improved, and the utilization rate of the light source is improved.

The height of any optical structure 23 is greater than that of the connection board 25, so that the material consumption of the connection board 25 can be reduced, and the manufacturing cost of the backlight module 200 and the display device 20 can be reduced.

The backlight module 200 further includes a support column 26, where the support column 26 is disposed on a side of the connection plate 25 facing away from the lamp panel 21 and spaced apart from the optical structure 23. The support columns 26 may support the diffusion plate and the composite membrane to reduce wobble of the diffusion plate and the composite membrane. It will be appreciated that the height of the support posts 26 is greater than the height of the optical structures 23, so that the diffuser plate and the composite film can be supported, and the light emitting requirements of the lamp beads 22 can be met.

Wherein, the support column 26 can be integrally formed with the connecting plate 25, thereby saving the process steps, simplifying the production process and greatly reducing the cost of optimizing halation.

In the backlight module 200 and the display device 20 provided in the embodiments of the present application, the optical structure 23 with a specific gradient is designed according to the light propagation path, so that the propagation direction of the light causing halation can be effectively adjusted, and the light is reflected to the specified area where the lamp beads 22 are responsible for lighting, thereby achieving the purpose of optimizing halation. In order to solve the halation problem conveniently, efficiently and cost-effectively, the embodiment of the application integrally forms the optical structure 23 and the connecting plate 25, takes PC material as a base material and sets up a die capable of mass production according to the modeling and dimming requirements of the lamp panel 21. Meanwhile, the support column 26 and the connecting plate 25 can be integrally formed, after the structural finished product is manufactured, white ink with the reflectivity exceeding 80% is uniformly sprayed on the surface of the manufactured integrated plate made of bare PC material by utilizing spraying equipment, so that the optical characteristics of the surface layer of the PC are changed, the surface of the integrated plate has the reflecting function similar to that of a reflecting sheet, the halation problem can be solved in batch, the additional setting step of the support column 26 is saved, and the production process is simplified.

For example, please refer to fig. 1 to 6 in combination with fig. 7, fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present application. The backlight module 200 further includes a back plate 27, and the back plate 27 is used for carrying electrical devices in the backlight module 200.

For example, the back plate 27 includes a bottom plate 270, a first side plate 271, a second side plate 272 and a third side plate 273, where the bottom plate 270, the first side plate 271, the second side plate 272 and the third side plate 273 can be integrally formed, and the bottom plate 270, the first side plate 271, the second side plate 272 and the third side plate 273 are made of the same material, such as metal plates, so that on one hand, support can be provided, deformation can be reduced, and on the other hand, a heat dissipation effect can be achieved for the lamp beads 22.

The bottom plate 270 is disposed on a side of the lamp panel 21 facing away from the lamp beads 22, and the bottom plate 270 is used for carrying the lamp panel 21, the lamp beads 22, the optical structure 23 and the support columns 26.

The first side plate 271 and the bottom plate 270 are connected in a bent manner, for example, the first side plate 271 and the bottom plate 270 may be disposed at 90 ° or vertically. The first side plate 271 may be disposed at a periphery of the bottom plate 270, where the first side plate 271 and the bottom plate 270 enclose a receiving groove, and the lamp panel 21, the lamp beads 22, the optical structure 23 and the support column 26 are disposed in the receiving groove to fix the lamp panel 21, the lamp beads 22, the optical structure 23 and the support column 26.

The second side plate 272 is connected to the first side plate 271 in a bending manner, for example, may be connected vertically, and the second side plate 272 extends from the first side plate 271 in a direction away from the accommodating groove. The second side plate 272 is used for carrying the diffusion plate 28 and the composite film 29, and the diffusion plate 28 and the composite film 29 have the same area, and are stacked, and the area of the diffusion plate 28 is larger than the area of the lamp panel 21.

The third side plate 273 is bent and connected with the second side plate 272, for example, the third side plate 273 can be vertically connected, and the third side plate 273 extends from the second side plate 272 towards a direction away from the lamp panel 21, so that the third side plate 273 can limit the diffusion plate 28 and the composite film 29.

The back plate 27 further includes a fourth side plate 274, the fourth side plate 274 is parallel to the second side plate 272 and protrudes from the third side plate 273, and the fourth side plate 274 is used for carrying the display screen 210.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features.

The backlight module and the display device provided by the embodiment of the application are described in detail, and specific examples are applied to illustrate the principle and the implementation of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the present description should not be construed as limiting the present application in summary.

Claims

1. A backlight module, comprising:

the lamp panel is used for bearing the lamp beads;

The lamp beads are arranged on the lamp panel at intervals;

2. The backlight module according to claim 1, wherein the side wall of each optical hole facing the lamp bead is inclined with respect to the lamp panel, and the diameter of the optical hole near one end of the lamp panel is smaller than the diameter of the optical hole far from one end of the lamp panel.

3. A backlight module according to claim 2, wherein the backlight module further comprises:

4. A backlight module according to claim 3, wherein the connection plate is integrally formed with the plurality of optical structures.

5. A backlight module according to claim 3, wherein the height of any one of the optical structures is greater than the height of the connection plate.

6. A backlight module according to claim 5, further comprising:

7. The backlight module according to claim 6, wherein the support posts are integrally formed with the connection plate; and/or

8. A backlight module according to any one of claims 1-7, wherein each of the optical structures has a square shape; and/or

9. A backlight module according to claim 8, wherein a side of each optical structure facing away from the lamp panel is provided with white ink, and the reflectivity of the white ink is greater than 80%.

10. A display device, comprising:

the backlight module according to any one of claims 1-9;

And the display screen is arranged on the backlight module.