Array substrate, method of driving array substrate, method of fabricating array substrate, and display panel

Patent metadata

Field	Value
Publication number	US-2021364834-A1
Application number	US-201816332492-A
Country	US
Kind code	A1
Filing date	Jun 27, 2018
Priority date	Dec 13, 2017
Publication date	Nov 25, 2021
Grant date	—

Abstract

An array substrate, a method of driving an array substrate, a method of fabricating and array substrate, and a display panel including an array substrate are provided. The array substrate includes a base substrate (5), a first electrode (1) and a second electrode (2) on the base substrate (5), a polymer-dispersed liquid crystal layer (3) between the first electrode (1) and the second electrode (2), and a reflective layer (4) on a side of the polymer-dispersed liquid crystal layer (3) opposite from the base substrate (5). The polymer-dispersed liquid crystal layer (3) is configured to switch between a transparent state and an opaque state in accordance with a voltage applied between the first electrode (1) and the second electrode (2).

First claim

1 . An array substrate, comprising:
a base substrate, a first electrode and a second electrode on the base substrate, a polymer-dispersed liquid crystal layer between the first electrode and the second electrode, and a reflective layer on a side of the polymer-dispersed liquid crystal layer opposite from the base substrate, wherein the polymer-dispersed liquid crystal layer is configured to switch between a transparent state and an opaque state in accordance with a voltage applied between the first electrode and the second electrode.

2 . The array substrate according to claim 1 , wherein the first electrode, the polymer-dispersed liquid crystal layer, and the second electrode are patterned, and the patterns of the first electrode, the polymer-dispersed liquid crystal layer, and the second electrode correspond to each other.

3 . The array substrate according to claim 1 , wherein the first electrode, the polymer-dispersed liquid crystal layer, and the second electrode are patterned, and the patterns of the first electrode, the polymer-dispersed liquid crystal layer, and the second electrode correspond to each other in a stack direction of the array substrate.

4 . The array substrate according to claim 1 , wherein each of the first electrode and the second electrode comprises a transparent conductive material.

5 . The array substrate according to claim 1 , wherein each of the first electrode and the second electrode comprises indium tin oxide and graphene.

6 . The array substrate according to claim 1 ,
wherein the reflective layer comprises a metal reflective layer and a plurality of through-holes in the metal reflective layer.

7 . The array substrate according to claim 6 , wherein the plurality of through-holes are arranged in an array.

8 . The array substrate according to claim 1 , wherein the reflective layer comprises a metal reflective layer and a plurality of gaps in the metal reflective layer.

9 . The array substrate according to claim 6 , wherein a ratio of a total area of the plurality of the metal reflective layer and a total cross-sectional area of openings of the plurality of through-holes is from 1:1 to 1:3.

10 . The array substrate according to claim 1 , further comprising a thin film transistor component,
wherein the thin film transistor component is provided iii a region of the array substrate that does not overlap with the base substrate, the first electrode, the polymer-dispersed liquid, crystal layer, the reflective layer, and the second electrode.

11 . The array substrate according to claim 1 , further comprising a flattening layer on the second electrode.

12 . A display panel comprising the array substrate according to claim 1 .

13 . The display panel according to claim 12 , further comprising a color filter substrate and a liquid crystal layer between the array substrate and the color filter substrate.

14 . The display panel according to claim 12 , further comprising a backlight,
wherein the backlight is on a side of the base substrate opposite from the reflective layer.

15 . A method of driving the array substrate according to claim 1 , comprising controlling a voltage applied to the first electrode and the second electrode to switch the polymer-dispersed liquid crystal layer between the transparent state and the opaque state.

16 . The method according to claim 15 ,
wherein when an intensity of an external light is smaller than an intensity of light emitted by a backlight, the method comprises applying the voltage to the first electrode and the second electrode, so as to switch the polymer-dispersed liquid crystal layer into the transparent state, and wherein when the intensity of the external light is larger than the intensity of the light emitted by the backlight, the method comprises terminating the voltage applied to the first electrode and the second electrode, so as to switch the polymer-dispersed liquid crystal into the opaque state.

17 . A method of fabricating the array substrate according to claim 1 , comprising:
forming a first electrode on a base substrate, forming a polymer-dispersed liquid crystal layer on the first electrode, forming a reflective layer on the polymer-dispersed liquid crystal layer, and forming a second electrode on the reflective layer, wherein a pattern of the first electrode, a pattern of the polymer-dispersed liquid crystal layer, and a pattern of the second electrode, correspond to each other.

18 . The method according to claim 17 , wherein the pattern of the first electrode, the pattern of the polymer-dispersed liquid crystal layer, and the pattern of the second electrode, correspond to each other in a stack direction of the array substrate.

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Gong Kui
• Duan Xianxue
• Liu Tianzhen
• Chen Cheng

Classifications

• G02F1/1334 Primary

  based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals · CPC title

• G02F1/1362

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

• G02F1/133514

  Colour filters · CPC title

• G02F1/13439

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

• G02F1/133553

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