Display substrate, display apparatus having the same, and fabricating method thereof

• US 9,971,223 B2
• Filed: 05/20/2016
• Issued: 05/15/2018
• 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
• Primary Examiner(s): Alexander, William R
• Application Number:
  US15/501,847
• Publication Number:
  US 20170351154A1
• Time in Patent Office: 725 Days
• Field of Search: 359266, 359265
• 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;

wherein forming the electrochromic layer comprises applying a voltage to the plurality of electrode blocks in presence of an electrochromic monomer material solution;

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

depositing the electrochromic polymer material onto the plurality of electrode blocks.

2. The method of claim 1, further comprising an insulating matrix having a grid pattern on a conductive layer;

wherein the plurality of electrode blocks are a plurality of exposed parts of the conductive layer defined by the grid pattern of the insulating matrix;

wherein the method further comprising;

forming the conductive layer on the base substrate; and

forming the insulating matrix having the grid pattern on a side of the conductive layer distal to the base substrate thereby forming the plurality of electrode blocks defined by the grid pattern of the insulating matrix.

3. The method of claim 2, wherein 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 forming the electrochromic layer comprises applying the voltage to the conductive layer in presence of the electrochromic monomer material solution;

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

depositing the electrochromic polymer material onto the plurality of exposed parts of the conductive layer defined by the grid pattern of the insulating matrix.

5. The method of claim 2, wherein 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, 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, an orthographic projection of the ancillary insulating matrix on the conductive layer substantially overlapping with an orthographic projection of the black matrix on the conductive layer.

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 forming the electrochromic layer comprises applying a voltage to the plurality of pixel electrode blocks.

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

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

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

depositing the electrochromic polymer material onto the plurality of pixel electrode blocks.

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

12. The display substrate of claim 11, further comprising an insulating matrix having a grid pattern on a conductive layer;

and

wherein the plurality of electrode blocks are a plurality of exposed parts of the conductive layer defined by the grid pattern of the insulating matrix, 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, an orthographic projection of the ancillary insulating matrix on the conductive layer substantially overlapping with an orthographic projection of the black matrix on the conductive layer.

14. The display substrate of claim 12, 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 the 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 the 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.