Method for manufacturing COA array substrate and COA array substrate

Patent metadata

Field	Value
Publication number	US-10281789-B2
Application number	US-201816136212-A
Country	US
Kind code	B2
Filing date	Sep 19, 2018
Priority date	Nov 20, 2015
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A COA array substrate includes a base substrate, a TFT layer disposed on the base substrate, a pixel electrode layer and black matrixes disposed on the TFT layer, and a quantum dot color filter film disposed on the pixel electrode layer. The quantum dot color filter film is formed through electrochemical deposition applied to a mixture of quantum dots dispersed in electrolyte including chitosan. Through application of a voltage, chitosan brings the quantum dots to deposit on the TFT layer.

First claim

What is claimed is:

1. A color-filter-on-array (COA) array substrate, comprising a base substrate, a thin film transistor (TFT) layer disposed on the base substrate, a pixel electrode layer and black matrixes disposed on the TFT layer, and a quantum dot color filter film disposed on the pixel electrode layer;
wherein the pixel electrode layer comprises a plurality of red sub-pixel electrodes, a plurality of green sub-pixel electrodes, and a plurality of blue sub-pixel electrodes disposed alternately;
wherein the quantum dot color filter film comprises a plurality of red, green, and blue filter layers corresponding to the red, green, and blue sub-pixel electrodes, respectively; and
wherein a material of the red filter layers is a mixture of red quantum dots and chitosan; a material of the green filter layers is a mixture of green quantum dots and chitosan; and a material of the blue filter layers is a mixture of scattering particles and chitosan.

2. The COA array substrate according to claim 1 , wherein the red quantum dots have a particle size between 2 nm-10 nm.

3. The COA array substrate according to claim 1 , wherein the green quantum dots have a particle size between 2 nm-10 nm.

4. The COA array substrate according to claim 1 , wherein the scattering particles have a particle size between 2 nm-10 nm.

5. The COA array substrate according to claim 1 , wherein the red quantum dots comprise InP quantum dots coated with ZnS.

6. The COA array substrate according to claim 1 , wherein the green quantum dots comprise InAs quantum dots coated with ZnS.

7. The COA array substrate according to claim 1 , wherein the scattering particles comprise white, blue or transparent particles.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Deng Weijia

Classifications

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G02F1/1368 Primary

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F2001/134345

  Physics · mapped topic

• G02F2201/123

  pixel · CPC title