Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-11143897-B2
Application number	US-201816309068-A
Country	US
Kind code	B2
Filing date	Sep 19, 2018
Priority date	Aug 31, 2018
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A liquid crystal display device is provided. The liquid crystal display device comprises a liquid crystal cell and a backlight module, and the liquid crystal cell comprises a color filter, an array substrate, a liquid crystal layer, an upper polarizer, and a lower polarizer. The color filter comprises a glass substrate, a plurality of black matrixes, and a plurality of color blocks, and the color blocks are doped with infrared quantum dots, the array substrate comprises a plurality of infrared sensing layers, the infrared sensing layers are located within corresponding shielding areas of the array substrate on which the black matrixes project. The in-panel recognition can be implemented through integrating the infrared quantum dots in the color blocks of the liquid crystal display device and disposing the infrared sensing layers in the shielding areas of the array substrate.

First claim

What is claimed is:

1. A liquid crystal display device, comprising:
a liquid crystal cell and a backlight module, wherein the liquid crystal cell is disposed on the backlight module, and the backlight module is configured to provide a light source;
wherein the liquid crystal cell comprises a color filter, an array substrate, a liquid crystal layer, an upper polarizer, and a lower polarizer, the color filter is opposed to the array substrate, the liquid crystal layer is disposed between the color filter and the array substrate, the upper polarizer is attached to the color filter, and the lower polarizer is attached to the array substrate; the color filter comprises a glass substrate, a plurality of black matrixes, and a plurality of color blocks, the black matrixes are disposed on the glass substrate, the color blocks are disposed on the glass substrate, and the color blocks and the black matrixes are alternately arranged with each other; and
wherein the color blocks are doped with infrared quantum dots, the array substrate comprises a plurality of infrared sensing layers, the infrared sensing layers are located within corresponding shielding areas of the array substrate on which the black matrixes project, the infrared sensing layers are configured to transmit at least one signal to a sensor chip, the infrared sensing layers are arranged along and located at a first side edge of the shielding area, and the first side edge of the shielding area is adjacent to the corresponding color blocks.

2. The liquid crystal display device according to claim 1 , wherein the color filter comprises an overcoat layer, and the black matrixes and the color blocks are located between the glass substrate and the overcoat layer.

3. The liquid crystal display device according to claim 2 , wherein the upper polarizer is disposed on an upper surface of the glass substrate, and the array substrate is disposed on the lower polarizer.

4. The liquid crystal display device according to claim 2 , wherein the upper polarizer is disposed on a lower surface of the overcoat layer, and the array substrate is disposed on the lower polarizer.

5. The liquid crystal display device according to claim 1 , wherein the infrared quantum dots comprise II-VI group semiconductor material or III-V group semiconductor material.

6. The liquid crystal display device according to claim 5 , wherein the II-VI group semiconductor material comprises CdS, CdSe, CdTe, or ZnSe, and the III-V group semiconductor material comprises InP or InAs.

7. The liquid crystal display device according to claim 1 , wherein each of the color blocks is an organic color resist or a dye, and the color blocks are doped with a dispersion agent.

8. The liquid crystal display device according to claim 7 , wherein the dispersion agent is selected from one or more of an amide based polymer, a modified polyurethane polymer, a high molecular block copolymer containing a pigment-philic group, a modified polyurethane, a modified polyacrylate, and a silicone surfactant.

9. The liquid crystal display device according to claim 1 , wherein the array substrate further comprises a substrate, a first buffer layer, a second buffer layer, a polysilicon layer, a gate insulating layer, a gate, an interlayer insulating layer, a source, a drain, a planarization layer, a common electrode, a passivation layer, and a pixel electrode;
wherein the first buffer layer is disposed on the substrate, the second buffer layer is disposed on the first buffer layer, the polysilicon layer is disposed on the second buffer layer, the gate insulating layer is disposed on the polysilicon layer, the gate is disposed on the gate insulating layer, the interlayer insulating layer is disposed on the gate insulating layer and the gate, the source and the drain are disposed on the interlayer insulating layer, the planarization layer is disposed on the source, the drain, and the interlayer insulating layer, the common electrode is disposed on the planarization layer, the passivation layer is disposed on the common electrode, the pixel electrode is disposed on the passivation layer, and the infrared sensing layers are disposed in the interlayer insulating layer.

10. The liquid crystal display device according to claim 9 , wherein the infrared sensing layers are arranged and located at the same side of the corresponding shielding areas.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Zha Guowei

Classifications

• G06V40/1318

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• A61B5/742

  using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339) · CPC title

• G02F2202/104

  poly-Si · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title