Diffusion Plate and Manufacturing Method Thereof, Backlight Module

Patent metadata

Field	Value
Publication number	US-2016356949-A1
Application number	US-201514893861-A
Country	US
Kind code	A1
Filing date	May 30, 2015
Priority date	Dec 16, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

A diffusion plate is provided. The diffusion plate includes a diffusion plate substrate, wherein the diffusion plate substrate includes grooves configured to accommodate microstructures of a light guide plate. The groove has a width larger than that of the microstructure, and the groove has a depth larger than a height of the microstructure. A method of manufacturing the diffusion plate and a backlight module are also provided. The groove of the diffusion plate provided by embodiments of the disclosure combines with the microstructure on the surfaces of the light guide plate to form a stable structure together so that the relative movement between them is reduced, and the white spot problem caused by the microstructures being scratched is also reduced.

First claim

1 . A diffusion plate, comprising a diffusion plate substrate, wherein the diffusion plate substrate includes grooves configured to accommodate microstructures of a light guide plate, and each of the grooves has a width larger than that of the microstructures and each of the grooves has a depth larger than a height of the microstructures.

2 . The diffusion plate according to claim 1 , wherein the diffusion plate substrate further comprises protrusion structures located on positions other than positions of the grooves of the diffusion plate.

3 . The diffusion plate according to claim 2 , wherein the protrusion structures comprises a plurality of protrusions having different heights.

4 . The diffusion plate according to claim 3 , wherein the plurality of protrusions comprise a first protrusion, a second protrusion and a third protrusion.

5 . The diffusion plate according to claim 4 , wherein the first protrusion has a first height larger than a second height of the second protrusion, and the second height of the second protrusion is larger than a third height of the third protrusion.

6 . The diffusion plate according to claim 3 , wherein the protrusions are in a shape of sphere segment.

7 . The diffusion plate according to claim 6 , wherein the protrusions in the sphere segment have a diameter of 2 μm-4 μm.

8 . A method of manufacturing a diffusion plate, comprising:
a step of forming a plurality of grooves configured to accommodate microstructures of a light guide plate on surfaces of a diffusion plate substrate; and a step of filling a part of grooves and allowing the remained of unfilled grooves to be corresponded to the microstructures of the light guide plate.

9 . The method according to claim 8 , wherein the step of forming the plurality of grooves configured to accommodate the microstructures of the light guide plate on the surfaces of the diffusion plate substrate comprises:
coating resin material on the surfaces of the diffusion plate substrate; forming grooves corresponding to the microstructures of the light guide plate by roller rolling; and curing the resin material.

10 . The method according to claim 8 , wherein the step of forming the plurality of grooves configured to accommodate the microstructures of the light guide plate on the surfaces of the diffusion plate substrate comprises:
filling the part of grooves up; and curing the resin material.

11 . The method according to claim 10 , wherein in a case that the part of grooves are filled with the resin material, the resin material is mixed with granules used to form the protrusion, the resin material mixed with the granules is filled into a corresponding groove via a transfer roller so that the grooves are filled up and a plurality of protrusions are formed.

12 . A backlight module, comprising the diffusion plate according to claim 1 .

13 . The diffusion plate according to claim 4 , wherein the protrusions are in a shape of sphere segment.

14 . The diffusion plate according to claim 5 , wherein the protrusions are in a shape of sphere segment.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Song Yong

Classifications

• G02B6/0016

  Grooves, prisms, gratings, scattering particles or rough surfaces · CPC title

• G02B5/0226 Primary

  having particles on the surface · CPC title

• B29L2011/0075

  Light guides, optical cables · CPC title

• B29D11/00865

  Applying coatings; tinting; colouring (printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055) · CPC title

• B29D11/00798

  Producing diffusers · CPC title