Array substrate for reflective display panel, method for preparing the same and display panel

Patent metadata

Field	Value
Publication number	US-11307464-B2
Application number	US-201916561837-A
Country	US
Kind code	B2
Filing date	Sep 5, 2019
Priority date	Feb 15, 2019
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

The present disclosure provides an array substrate for a reflective display panel, a method for preparing the same, and a display panel, the array substrate including a base and a pixel electrode and a structure for reflecting light arranged on the base, in which the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough.

First claim

What is claimed is:

1. An array substrate for a reflective display panel, comprising: a base; and a pixel electrode and a structure for reflecting light arranged on the base, wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough,
wherein the structure for reflecting light is an aluminum film doped with non-ferrous metal ions, and
wherein the aluminum film doped with non-ferrous metal ions comprises an aluminum film doped with cuprous ions, an aluminum film doped with ferrous ions, and an aluminum film doped with copper ions.

2. The array substrate of claim 1 , wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base.

3. The array substrate of claim 1 , wherein the pixel electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the pixel electrode proximate to the base.

4. The array substrate of claim 1 , wherein the array substrate further comprises a common electrode, the common electrode is arranged on a surface of the pixel electrode away from the base, and the structure for reflecting light is arranged on a surface of the common electrode away from the base.

5. The array substrate of claim 1 , wherein the array substrate further comprises a transparent common electrode, the common electrode is arranged on a surface of the pixel electrode away from the base, and the structure for reflecting light is arranged on a surface of the common electrode proximate to the base.

6. The array substrate of claim 1 , wherein the array substrate further comprises a light absorbing layer arranged on a surface of the base away from the pixel electrode.

7. The array substrate of claim 6 , wherein a material constituting the light absorbing layer is a black resin.

8. The array substrate of claim 2 , wherein the pixel electrode has a function of absorbing light.

9. The array substrate of claim 4 , wherein the common electrode has a function of absorbing light.

10. The array substrate of claim 8 , wherein the common electrode comprises a transparent conductive oxide layer and a ferrous metal layer that are laminated.

11. The array substrate of claim 9 , wherein the pixel electrode comprises a transparent conductive oxide layer and a ferrous metal layer that are laminated.

12. A method for preparing the array substrate for a reflective display panel of claim 1 , comprising:
forming the pixel electrode and the structure for reflecting light on the base by a patterning process,
wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough.

13. The method of claim 12 , wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base or on a surface of the pixel electrode proximate to the base, and the pixel electrode and the structure for reflecting light are formed by a same mask.

14. The method of claim 12 , wherein the structure for reflecting light is arranged on a surface of the common electrode away from the base or on a surface of the common electrode proximate to the base, and the common electrode and the structure for reflecting light are formed by a same mask.

15. The method of claim 12 , wherein the method further comprises:
a step of forming a light absorbing layer on a surface of the base away from the pixel electrode.

16. A display panel, comprising an upper substrate and a lower substrate arranged opposite to each other, and a liquid crystal layer arranged between the lower substrate and the upper substrate, wherein the lower substrate is the array substrate of claim 1 .

17. The display panel of claim 16 , wherein the structure for reflecting light is arranged on a surface of the pixel electrode away from the base; or the pixel electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the pixel electrode proximate to the base.

18. The display panel of claim 16 , wherein the array substrate further comprises a common electrode, and the common electrode is arranged on a surface of the pixel electrode away from the base, and
wherein the structure for reflecting light is arranged on a surface of the common electrode away from the base; or the common electrode is a transparent electrode, and the structure for reflecting light is arranged on a surface of the common electrode proximate to the base.

19. An array substrate for a reflective display panel, comprising: a base; and a pixel electrode and a structure for reflecting light arranged on the base, wherein the structure for reflecting light is configured to reflect light at a predetermined wavelength and allow light other than the light at the predetermined wavelength to transmit therethrough,
wherein the structure for reflecting light is a polymer film composed of a plurality of stacked polymer layers, and
wherein each polymer layer in the polymer film has a reflectivity to the light at the predetermined wavelength greater than a reflectivity to the light other than the light at the predetermined wavelength, and a thickness of a quarter of the predetermined wavelength, and a refractive index of the polymer layers gradually decreases in a direction from the base to the polymer film.

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Yang Guanglei
• Fang Zhixiang

Classifications

• G02F2201/123

  pixel · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/133553 Primary

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

• G02F1/134318

  having a patterned common electrode · CPC title

• G02F1/133609

  including means for improving the color mixing, e.g. white · CPC title