CN-224232073-U - Diffusion plate, backlight module and display device

Abstract

The embodiment of the application provides a diffusion plate, a backlight module and display equipment, and relates to the technical field of display equipment, wherein the diffusion plate is provided with a light inlet side and a light outlet side which are oppositely arranged in the thickness direction of the diffusion plate, and a first foaming layer and a second foaming layer which are overlapped in the thickness direction of the diffusion plate; wherein the length direction of the bubbles of the first foaming layer and the length direction of the bubbles of the second foaming layer, the projections of the two length directions on the light incident side of the diffusion plate are arranged in an intersecting manner. According to the embodiment of the application, the first foaming layer and the second foaming layer are arranged, the air bubbles of the first foaming layer and the air bubbles of the second foaming layer are inconsistent in extending direction, after light rays enter from the light inlet side of the diffusion plate, the light rays sequentially pass through the first foaming layer and the second foaming layer and are refracted by the air bubbles in the first foaming layer and the second foaming layer, and as the air bubbles of the first foaming layer and the air bubbles of the second foaming layer are inconsistent in extending direction, the diffusion effect of the diffusion plate can be effectively improved, and the uniformity of the light rays flowing out from the light outlet side is better.

Inventors

• LIU JING
• SUN XIONG
• LI FANGQUN

Assignees

• 惠州视维新技术有限公司

Dates

Publication Date

20260512

Application Date

20250428

Claims (10)

1. 1. A diffusion plate, characterized in that the diffusion plate has an light-in side and a light-out side which are disposed opposite to each other in a thickness direction thereof, and a first foamed layer and a second foamed layer which are stacked in the thickness direction thereof; Wherein the length direction of the bubbles of the first foaming layer and the length direction of the bubbles of the second foaming layer, the projections of the two length directions on the light incident side of the diffusion plate are arranged in an intersecting mode.
2. 2. The diffuser plate according to claim 1, wherein the projection angle of the two lengthwise directions on the light incident side of the diffuser plate is a,60 ° -a-120 °.
3. 3. The diffuser plate of claim 2, wherein 86 DEG≤a≤94 DEG, and/or, The thickness of the first foaming layer is equal to that of the second foaming layer.
4. 4. The diffuser plate of claim 1, wherein an adhesive layer is disposed between the first foam layer and the second foam layer.
5. 5. The diffuser plate of claim 4 wherein said adhesive layer is comprised of UV glue.
6. 6. The diffuser plate of any one of claims 1 to 5 further comprising a first base layer and a second base layer, wherein the first base layer is disposed on a side of the first foam layer away from the second foam layer, and a side of the first base layer away from the first foam layer forms the light entrance side, the second base layer is disposed on a side of the second foam layer away from the first foam layer, and a side of the second base layer away from the second foam layer forms the light exit side.
7. 7. The diffuser plate of any one of claims 1 to 5, wherein the light exit side and/or the light entry side of the diffuser plate is provided with ribs.
8. 8. The diffuser plate of claim 7, wherein the ribs on the light exit side are arranged in a triangular stripe shape, and/or, The convex ribs positioned on the light incident side are arranged in a quadrangular frustum pyramid shape.
9. 9. A backlight module comprising the diffusion plate according to any one of claims 1 to 8.
10. 10. A display device comprising the diffusion plate according to any one of claims 1 to 8.

Description

Diffusion plate, backlight module and display device Technical Field The application relates to the technical field of display equipment, in particular to a diffusion plate, a backlight module and display equipment. Background At present, the foaming diffusion plate on the market is formed by adopting a three-layer structure that an upper base layer and a lower base layer are used for clamping a foaming layer, and the extending directions of bubbles in the foaming layer are consistent, so that when light rays are refracted in the foaming layer, the diffusion effect is poor, and the uniformity of light emitted by the diffusion plate is poor. Disclosure of utility model The embodiment of the application provides a diffusion plate, a backlight module and display equipment, and aims to improve the diffusion uniformity of the existing foaming diffusion plate. In one aspect, embodiments of the present application provide a diffusion plate having an light-incident side and a light-emitting side disposed opposite to each other in a thickness direction thereof, and a first foamed layer and a second foamed layer stacked along the thickness direction thereof; Wherein the length direction of the bubbles of the first foaming layer and the length direction of the bubbles of the second foaming layer, the projections of the two length directions on the light incident side of the diffusion plate are arranged in an intersecting mode. In some embodiments, the first foam layer has a bubble length direction and the second foam layer has a bubble length direction, and the projection angle of the two length directions on the light incident side of the diffusion plate is a,60 degrees less than or equal to 120 degrees. In some embodiments, 86 A≤94, and/or, The thickness of the first foaming layer is equal to that of the second foaming layer. In some embodiments, an adhesive layer is disposed between the first foam layer and the second foam layer. In some embodiments, the adhesive layer is comprised of UV glue. In some embodiments, the diffusion plate further comprises a first base layer and a second base layer, the first base layer is disposed on a side of the first foaming layer away from the second foaming layer, and a side of the first base layer away from the first foaming layer constitutes the light incident side, the second base layer is disposed on a side of the second foaming layer away from the first foaming layer, and a side of the second base layer away from the second foaming layer constitutes the light emergent side. In some embodiments, the light exit side and/or the light entrance side of the diffuser plate is provided with ribs. In some embodiments, the ribs on the light-emitting side are arranged in a triangular stripe shape, and/or, The convex ribs positioned on the light incident side are arranged in a quadrangular frustum pyramid shape. In another aspect, embodiments of the present application provide a backlight module including a diffuser plate as described above. In yet another aspect, embodiments of the present application provide a display device including a diffuser plate as described above. According to the embodiment of the application, the first foaming layer and the second foaming layer are arranged, the length direction of the bubbles of the first foaming layer and the length direction of the bubbles of the second foaming layer are arranged in an intersecting manner, namely, the extending directions of the bubbles of the first foaming layer and the bubbles of the second foaming layer are inconsistent, after light enters from the light inlet side of the diffusion plate, the light sequentially passes through the first foaming layer and the second foaming layer and is refracted by the bubbles in the first foaming layer and the second foaming layer, and as the extending directions of the bubbles of the first foaming layer and the bubbles of the second foaming layer are inconsistent, the diffusion effect of the diffusion plate can be effectively improved, and the uniformity of the light flowing out from the light outlet side is better. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a top view of a diffuser plate provided in some embodiments of the present application; FIG. 2 is a cross-sectional view at A-A in FIG. 1; FIG. 3 is an enlarged view of a portion of FIG. 2 at C; FIG. 4 is a cross-sectional view at B-B in FIG. 1; fig. 5 is a schematic view of a projection of the light-entering side in fig. 1. Description of main reference numerals: Reference numerals Name of the nameReference numer