Array substrate and preparation method thereof, display panel and driving method thereof

Patent metadata

Field	Value
Publication number	US-11614669-B2
Application number	US-202117183238-A
Country	US
Kind code	B2
Filing date	Feb 23, 2021
Priority date	Feb 28, 2020
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

The present disclosure provides an array substrate and a preparation method thereof, a display panel and a driving method thereof, which belongs to the field of display technology. The array substrate includes a base substrate, a driving circuit layer, a reflective electrode layer, a light-emitting layer, an electrochromic layer, and a common electrode layer. The driving circuit layer is provided with a first and second driving circuit. The reflective electrode layer is provided on a side of the driving circuit layer away from the base substrate and provided with a first and second reflective electrode insulated from each other. The light-emitting layer includes a light-emitting unit arranged on the surface of the second reflective electrode away from the base substrate. The electrochromic layer is arranged on the surface of the first reflective electrode away from the base substrate. The common electrode layer covers the electrochromic layer and the light-emitting unit.

First claim

What is claimed is:

1. An array substrate, comprising:
a base substrate;
a driving circuit layer provided on a side of the base substrate, wherein the driving circuit layer is provided with a first driving circuit and a second driving circuit;
a reflective electrode layer provided on a side of the driving circuit layer away from the base substrate, wherein the reflective electrode layer is provided with a first reflective electrode and a second reflective electrode, the first reflective electrode is electrically connected to an output terminal of the first driving circuit and insulated from the second reflective electrode, and the second reflective electrode is electrically connected to an output terminal of the second driving circuit;
a light-emitting layer comprising a light-emitting unit disposed on a surface of the second reflective electrode away from the base substrate;
an electrochromic layer provided on a surface of the first reflective electrode away from the base substrate; and
a common electrode layer covering a surface of the electrochromic layer away from the base substrate and a surface of the light-emitting unit away from the base substrate,
wherein the array substrate further comprises a pixel defining layer provided on a side of the driving circuit layer away from the base substrate, wherein the pixel defining layer is formed with a hollowed-out second pixel window, the second reflective electrode is arranged in the second pixel window, and the first reflective electrode covers a side of the pixel defining layer away from the base substrate, and
wherein the light-emitting unit is a light-emitting diode, and the array substrate further comprises a passivation protection layer provided between the reflective electrode layer and the common electrode layer, wherein the passivation protection layer is formed with a hollowed-out third pixel window, and the light-emitting unit is embedded in the third pixel window.

2. The array substrate according to claim 1 , wherein an amount of the second reflective electrode is multiple, and the first reflective electrode is formed with a plurality of hollowed-out first pixel windows in one-to-one correspondence with each of the second reflective electrodes, and any one of the second reflective electrodes is arranged in the corresponding first pixel window.

3. The array substrate according to claim 1 , wherein the first reflective electrode is an integrated structure.

4. The array substrate according to claim 1 , wherein:
a material of the electrochromic layer is a combination of one or more of tungsten oxide, molybdenum oxide, titanium oxide, vanadium oxide, and niobium oxide; or
a material of the electrochromic layer is a combination of one or more of nickel oxide, iridium oxide, cobalt oxide, and rhodium oxide.

5. The array substrate according to claim 1 , wherein the first reflective electrode and the second reflective electrode has the same material and thickness.

6. The array substrate according to claim 1 , wherein an amount of the second reflective electrode is multiple, and a distance between any one of the second reflective electrode and the first reflective electrode is 1˜10 microns.

7. The array substrate according to claim 1 , wherein the common electrode layer is a transparent conductive electrode.

8. The array substrate according to claim 1 , wherein the array substrate further comprises a fingerprint identification layer provided on a side of the common electrode layer away from the base substrate.

9. A method for preparing an array substrate, comprising:
providing a base substrate;
forming a driving circuit layer on a side of the base substrate, wherein the driving circuit layer is provided with a first driving circuit and a second driving circuit;
forming a reflective electrode layer on a side of the driving circuit layer away from the base substrate, wherein the reflective electrode layer is provided with a first reflective electrode and a second reflective electrode, the first reflective electrode is electrically connected to an output terminal of the first driving circuit and insulated from the second reflective electrode, and the second reflective electrode is electrically connected to an output terminal of the second driving circuit;
forming a light-emitting layer, wherein the light-emitting layer comprises a light-emitting unit disposed on a surface of the second reflective electrode away from the base substrate, wherein the light-emitting unit is a light-emitting diode;
forming an electrochromic layer, wherein the electrochromic layer covers a surface of the first reflective electrode away from the base substrate;
forming a common electrode layer, wherein the common electrode layer covers a surface of the electrochromic layer away from the base substrate and a surface of the light-emitting unit away from the base substrate;
forming a pixel defining layer on a side of the driving circuit layer away from the base substrate, wherein the pixel defining layer is formed with a hollowed-out second pixel window, the second reflective electrode is arranged in the second pixel window, and the first reflective electrode covers a side of the pixel defining layer away from the base substrate; and
forming a passivation protection layer between the reflective electrode layer and the common electrode layer, wherein the passivation protection layer is formed with a hollowed-out third pixel window, and the light-emitting unit is embedded in the third pixel window.

10. A display panel, comprising an array substrate, wherein the array substrate comprises:
a base substrate;
a driving circuit layer provided on a side of the base substrate, wherein the driving circuit layer is provided with a first driving circuit and a second driving circuit;
a reflective electrode layer provided on a side of the driving circuit layer away from the base substrate, wherein the reflective electrode layer is provided with a first reflective electrode and a second reflective electrode, the first reflective electrode is electrically connected to an output terminal of the first driving circuit and insulated from the second reflective electrode, and the second reflective electrode is electrically connected to an output terminal of the second driving circuit;
a light-emitting layer comprising a light-emitting unit disposed on a surface of the second reflective electrode away from the base substrate;
an electrochromic layer provided on a surface of the first reflective electrode away from the base substrate; and
a common electrode layer covering a surface of the electrochromic layer away from the base substrate and a surface of the light-emitting unit away from the base substrate,
wherein the array panel further comprises a pixel defining layer provided on a side of the driving circuit layer away from the base substrate, wherein the pixel defining layer is formed with a hollowed-out second pixel window, the second reflective electrode is arranged in the second pixel window, and the first reflective electrode covers a side of the pixel defining layer away from the base substrate, and
wherein the light-emitting unit is a light-emitting diode, and the array panel further comprises a passivation protection layer provided between the reflective electrode layer and the common electrode layer, wherein the passivation protection layer is formed with a hollowed-out third pixel window, and the light-emitting unit is embedded in the third pixel window.

11. The display panel according to claim 10 , wherein an amount of the second reflective electrode is multiple, and the first reflective electrode is formed with a plurality of hollowed-out first pixel windows in

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xu Jiawei
• Zeng Qin
• Wu Xintao
• Wu Qidi
• Fan Wenjin

Classifications

• G02F1/1524

  Transition metal compounds · CPC title

• H10K59/00

  Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00 · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G02F1/133553

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

• H10K50/805

  Electrodes · CPC title