Liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-11774794-B2
Application number	US-202017055553-A
Country	US
Kind code	B2
Filing date	Aug 31, 2020
Priority date	Jul 8, 2020
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

A liquid crystal display panel is provided, which includes a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer disposed between the color filter substrate and the array substrate. The array substrate includes: a substrate; an array driving layer disposed on the substrate; an insulating layer disposed on the array driving layer; a pixel electrode disposed on the insulating layer and electrically connected to a thin film transistor in the array driving layer by a via hole on the insulating layer; and a distributed Bragg reflective film disposed on the pixel electrode.

First claim

What is claimed is:

1. A liquid crystal display panel, comprising a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer disposed between the color filter substrate and the array substrate, wherein the array substrate comprises:
a substrate;
an array driving layer disposed on the substrate;
an insulating layer disposed on the array driving layer;
a pixel electrode disposed on the insulating layer and electrically connected to a thin film transistor in the array driving layer by a via hole on the insulating layer; and
a distributed Bragg reflective film disposed on the pixel electrode;
wherein the distributed Bragg reflective film comprises M reflective film groups in a stack, and each of the reflective film groups comprises N sub reflective layers, where M is a positive integer of greater than or equal to 1, and N is a positive integer of greater than or equal to 2;
wherein refractive indexes of different sub reflective layers in a same reflective film group are different; and
wherein the refractive indexes of the sub reflective layers in the same reflective film group are reduced layer by layer from one side adjacent to the pixel electrode to one side away from the pixel electrode.

2. The liquid crystal display panel according to claim 1 , wherein thicknesses of the reflective film groups are odd multiples of a quarter of wavelengths.

3. The liquid crystal display panel according to claim 1 , wherein thicknesses of different reflective film groups in the distributed Bragg reflective film are different.

4. The liquid crystal display panel according to claim 1 , wherein materials of the sub reflective layers comprise silicon nitride and silicon oxide.

5. The liquid crystal display panel according to claim 1 , wherein the pixel electrode is a reflective electrode and comprises a metal reflective layer and an electrode layer disposed on the metal reflective layer.

6. The liquid crystal display panel according to claim 5 , wherein an orthographic projection of the distributed Bragg reflective film on the substrate at least covers an orthographic projection of the pixel electrode on the substrate.

7. The liquid crystal display panel according to claim 5 , wherein one side surface of the insulating layer facing the pixel electrode is provided with a plurality of protruding structures corresponding to the pixel electrode, and the metal reflective layer is disposed undulatedly along a surface of the protruding structures.

8. A liquid crystal display panel, comprising a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer disposed between the color filter substrate and the array substrate, wherein the color filter substrate comprises color resists and a common electrode, and the array substrate comprises:
a substrate;
an array driving layer disposed on the substrate;
an insulating layer disposed on the array driving layer;
a pixel electrode disposed on the insulating layer and electrically connected to a thin film transistor in the array driving layer by a via hole on the insulating layer; and
a distributed Bragg reflective film disposed on the pixel electrode;
wherein the distributed Bragg reflective film comprises M reflective film groups in a stack, and each of the reflective film groups comprises N sub reflective layers, wherein M is a positive integer of greater than or equal to 1, and N is a positive integer of greater than or equal to 2;
wherein refractive indexes of different sub reflective layers in a same reflective film group are different; and
wherein the refractive indexes of the sub reflective layers in the same reflective film group are reduced layer by layer from one side adjacent to the pixel electrode to one side away from the pixel electrode.

9. The liquid crystal display panel according to claim 8 , wherein thicknesses of the reflective film groups are odd multiples of a quarter of wavelengths.

10. The liquid crystal display panel according to claim 8 , wherein thicknesses of different reflective film groups in the distributed Bragg reflective film are different.

11. The liquid crystal display panel according to claim 8 , wherein materials of the sub reflective layers comprise silicon nitride and silicon oxide.

12. The liquid crystal display panel according to claim 8 , wherein the pixel electrode is a reflective electrode and comprises a metal reflective layer and an electrode layer disposed on the metal reflective layer.

13. The liquid crystal display panel according to claim 12 , wherein an orthographic projection of the distributed Bragg reflective film on the substrate at least covers an orthographic projection of the pixel electrode on the substrate.

14. The liquid crystal display panel according to claim 12 , wherein one side surface of the insulating layer facing the pixel electrode is provided with a plurality of protruding structures corresponding to the pixel electrode, and the metal reflective layer is disposed undulatedly along a surface of the protruding structures.

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Zhang Yihe
• Huang Zhijun

Classifications

• G02F1/133514 Primary

  Colour filters · CPC title

• G02F1/133553 Primary

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02F1/134309

  characterised by their geometrical arrangement · CPC title

• G02F1/1362

  Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} · CPC title

• G02F2201/307

  Reflective grating, i.e. Bragg grating · CPC title