DISPLAY SUBSTRATE, DISPLAY APPARATUS HAVING THE SAME, AND FABRICATING METHOD THEREOF

• US 20170351154A1
• Filed: 05/20/2016
• Published: 12/07/2017
• Est. Priority Date: 08/25/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Gu, Xin, Chen, Juan, Chen, Ning
• Granted Patent: US 9,971,223 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2001/1555 Counter electrode
• CPC Class Codes: G02F 2001/1557 Side by side arrangements of working and counter electrodes
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements

Abstract

The present application discloses a method for fabricating a display substrate including forming an electrode layer comprising a plurality of electrode blocks on a base substrate; each electrode block corresponding to a subpixel region; and forming an electrochromic layer comprising a plurality of electrochromic blocks on the electrode layer by electrochemically depositing an electrochromic material onto the plurality of electrode blocks on a side of the electrode layer distal to the base substrate, each electrochromic block corresponding to each electrode block in a one-to-one relationship.

Claims

1. A method for fabricating a display substrate, comprising:

forming an electrode layer comprising a plurality of electrode blocks on a base substrate;

each electrode block corresponding to a subpixel region; and

forming an electrochromic layer comprising a plurality of electrochromic blocks on the electrode layer by electrochemically depositing an electrochromic material onto the plurality of electrode blocks on a side of the electrode layer distal to the base substrate, each electrochromic block corresponding to each electrode block in a one-to-one relationship.

2. The method of claim 1, wherein the electrode layer comprises the plurality of electrode blocks defined by an insulating matrix having a grid pattern on a conductive layer, the method comprising:

forming the conductive layer on the base substrate;

forming the insulating matrix on a side of the conductive layer distal to the base substrate occupying an insulating region; and

forming the electrochromic layer comprising the plurality of electrochromic blocks on a side of the conductive layer distal to the base substrate.

3. The method of claim 2, wherein the step of forming the electrochromic layer comprises applying a voltage to the conductive layer which is used as a working electrode.

4. The method of claim 3, wherein the step of forming the electrochromic layer comprises applying the voltage to the conductive layer in the presence of an electrochromic monomer material solution;

electrochemically polymerizing the electrochromic monomer material into an electrochromic polymer material; and

depositing the electrochromic polymer material onto the plurality of electrode blocks on a side of the conductive layer distal to the base substrate.

5. The method of claim 2, wherein the step of forming the insulating matrix comprising forming a black matrix using an insulating black material on a side of the conductive layer distal to the base substrate occupying a black matrix region;

the black matrix having the grid pattern defining the plurality of electrode blocks.

6. The method of claim 5, further comprising forming an ancillary insulating matrix on a side of the black matrix distal to the conductive layer, the ancillary insulating matrix substantially overlapping with the black matrix.

7. The method of claim 1, wherein the electrode layer is a pixel electrode layer comprising a plurality of pixel electrode blocks, the method comprising:

forming the electrochromic layer comprising the plurality of electrochromic blocks on a side of the pixel electrode layer distal to the base substrate.

8. The method of claim 7, wherein the step of forming the electrochromic layer comprises applying a voltage to the pixel electrode block.

9. The method of claim 8, wherein the step of forming an electrochromic layer comprises electrochemically depositing an electrochromic material on the pixel electrode block by applying the voltage to the pixel electrode block.

10. The method of claim 9, wherein the step of electrochemically depositing the electrochromic material comprises applying the voltage to the pixel electrode block in the presence of an electrochromic monomer material solution;

electrochemically polymerizing the electrochromic monomer material into an electrochromic polymer material; and

depositing the electrochromic polymer material onto the pixel electrode block.

11. A display substrate fabricated by a method of claim 1.

12. The display substrate of claim 11, wherein the electrode layer comprises the plurality of electrode blocks defined by an insulating matrix having a grid pattern on a conductive layer, the insulating matrix is a black matrix made of an insulating black material.

13. The display substrate of claim 12, further comprising an ancillary insulating matrix on a side of the black matrix distal to the conductive layer, the ancillary insulating matrix substantially overlapping with the black matrix.

14. The display substrate of claim 11, further comprising a spacer layer on a side of the insulating matrix distal to the conductive layer.

15. A method of fabricating a display apparatus, comprising fabricating a first display substrate by a method of claim 1, and assembling the first display substrate with a second display substrate.

16. The method of claim 15, further comprising:

applying a sealant to one of the first display substrate and the second display substrate;

adhering the first display substrate and the second display substrate by the sealant, and forming a sealant layer between the first display substrate and the second display substrate;

the sealant layer comprises an inlet;

injecting an electrolyte solution between the first display substrate and the second display substrate through the inlet; and

sealing the inlet.

17. The method of claim 15, further comprising forming an ion storage layer on the second display substrate.

18. A display apparatus, comprising a first display substrate and a second display substrate, wherein the first display substrate is a display substrate fabricated by a method of claim 1.

19. The display apparatus of claim 18, further comprising an electrolyte layer comprising an electrolyte solution between the first display substrate and the second display substrate.

20. The display apparatus of claim 18, further comprising an ion storage layer on the second display substrate.