Light guide plate and manufacturing method thereof, backlight assembly, and display assembly

Patent metadata

Field	Value
Publication number	US-10830940-B2
Application number	US-201816193370-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	Feb 24, 2018
Publication date	Nov 10, 2020
Grant date	Nov 10, 2020

Abstract

The present disclosure provides a light guide plate and a manufacturing method thereof, a backlight assembly, and a display assembly. The light guide plate of the present disclosure includes: a light guide plate body; a first light outgoing surface formed on one surface of two opposite surfaces of the light guide plate body which have a largest area; a second light outgoing surface formed on the other surface of the two opposite surfaces of the light guide plate body which have the largest area; a light incoming surface formed on a side surface of the light guide plate body extending in a direction perpendicular to the first and the second outgoing surfaces; and a plurality of light diffusion structures formed on a plane inside the light guide plate.

First claim

What is claimed is:

1. A light guide plate, comprising:
a light guide plate body;
a first light outgoing surface formed on one surface of two opposite surfaces of the light guide plate body which have a largest area;
a second light outgoing surface formed on the other surface of the two opposite surfaces of the light guide plate body which have the largest area;
a light incoming surface formed on a side surface of the light guide plate body extending in a direction perpendicular to the first and the second outgoing surfaces; and
a plurality of light diffusion structures formed on a plane inside the light guide plate body,
wherein the plurality of light diffusion structures are uniformly arranged from a center in a concentric-circle pattern and each of the plurality of light diffusion structures is formed as a hollow structure.

2. The light guide plate of claim 1 , wherein the plane is parallel to the first outgoing surface and/or the second outgoing surface.

3. The light guide plate of claim 1 , wherein a portion of the plurality of light diffusion structures each is formed as a square hollow structure, and a remaining portion of the plurality of light diffusion structures each is formed as a ball-shaped hollow structure.

4. The light guide plate of claim 1 , wherein distances between any two adjacent light diffusion structures among the plurality of light diffusion structures are identical.

5. The light guide plate of claim 1 , wherein the light guide plate body is made of polymethylmethacrylate or glass.

6. A backlight assembly, comprising the light guide plate of claim 1 and at least one LED light source which is provided to face the light incoming surface of the light guide plate body,
wherein, an optical axis of the at least one LED light source being perpendicular to the light incoming surface.

7. A display assembly comprising the backlight assembly of claim 6 , wherein
the display assembly further comprises a first optical assembly and a first display panel being provided to face the first light outgoing surface of the light guide plate body, and a second optical assembly and a second display panel being provided to face the second light outgoing surface of the light guide plate body.

8. The display assembly of claim 7 , wherein the plane is parallel to the first light outgoing surface and/or the second light outgoing surface.

9. A method of manufacturing a light guide plate, the light guide plate comprising:
a light guide plate body;
a first light outgoing surface formed on one surface of two opposite surfaces of the light guide plate body which have a largest area;
a second light outgoing surface formed on the other surface of the two opposite surfaces of the light guide plate body which have the largest area;
a light incoming surface formed on a side surface of the light guide plate body extending in a direction perpendicular to the first and the second outgoing surfaces; and
a plurality of light diffusion structures formed on a plane inside the light guide plate body;
the method comprising steps of:
preparing the light guide plate body such that the light guide plate body comprises the first light outgoing surface on the one surface of the two opposite surfaces of the light guide plate body which have the largest area and the second light outgoing surface on the other surface of the two opposite surfaces of the light guide plate body which have the largest area; and
forming the plurality of light diffusion structures on the plane inside the light guide plate body such that the plurality of light diffusion structures are uniformly arranged from a center in a concentric-circle pattern and each of the plurality of light diffusion structures is formed as a hollow structure.

10. The method of claim 9 , wherein the plane is parallel to the first outgoing surface and/or the second outgoing surface.

11. The method of claim 9 , wherein each of the plurality light diffusion structures is engraved as a ball-shaped or square hollow structure by laser engraving.

12. The method of claim 9 , wherein distances between any two adjacent light diffusion structures among the plurality of light diffusion structures are identical.

13. A light guide plate, comprising:
a light guide plate body;
a first light outgoing surface formed on one surface of two opposite surfaces of the light guide plate body which have a largest area;
a second light outgoing surface formed on the other surface of the two opposite surfaces of the light guide plate body which have the largest area;
a light incoming surface formed on a side surface of the light guide plate body extending in a direction perpendicular to the first and the second light outgoing surfaces; and
a plurality of light diffusion structures formed on a plane inside the light guide plate body,
wherein the plurality of light diffusion structures are arranged in a wave-type pattern, which extends along in a direction perpendicular to the light incoming surface, and each of the plurality of light diffusion structures is formed as a hollow structure.

14. The light guide plate of claim 13 , wherein the plane is parallel to the first light outgoing surface and/or the second light outgoing surface.

15. The light guide plate of claim 13 , wherein a portion of the plurality of light diffusion structures each is formed as a square hollow structure, and a remaining portion of the plurality of light diffusion structures each is formed as a ball-shaped hollow structure.

16. The light guide plate of claim 13 , wherein distances between any two adjacent light diffusion structures among the plurality of light diffusion structures are identical.

17. The light guide plate of claim 13 , wherein the light guide plate body is made of polymethylmethacrylate or glass.

Assignees

• Boe Technology Group Co Ltd
• K Tronics Suzhou Tech Co Ltd

Inventors

• Chen Liri
• Zhou Qingen
• Zhang Rongshun

Classifications

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02B6/0058

  varying in density, size, shape or depth along the light guide · CPC title

• G02B6/0041 Primary

  provided in the bulk of the light guide · CPC title

• G02B6/0061

  to provide homogeneous light output intensity · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title