Cover plate, method for preparing the same, and display device

Patent metadata

Field	Value
Publication number	US-11269228-B2
Application number	US-201916958584-A
Country	US
Kind code	B2
Filing date	Sep 25, 2019
Priority date	Oct 24, 2018
Publication date	Mar 8, 2022
Grant date	Mar 8, 2022

Abstract

The present disclosure provides a cover plate, a method for preparing the same, and a display device. The cover plate provided by the present disclosure is applied to a display device. The cover plate includes two main surfaces that are arranged opposite to each other and a side surface connecting the two main surfaces, in which a groove is formed in the side surface, and a chromogenic material layer and a chromogenic control structure for controlling the chromogenic material layer are arranged in the groove.

First claim

What is claimed is:

1. A cover plate applied to a display device, comprising two main surfaces that are arranged opposite to each other and a side surface connecting the two main surfaces,
wherein a groove is formed in the side surface, and a chromogenic material layer and a chromogenic control structure for controlling the chromogenic material layer are arranged in the groove,
wherein the chromogenic control structure comprises at least one first electrode and at least one second electrode, and the first electrode and the second electrode are spaced apart and capable of generating an electric field when different voltages are applied,
wherein the two main surfaces are a first main surface and a second main surface, and a light shielding layer is arranged in a peripheral area of the first main surface, and
wherein the chromogenic control structure further comprises a fan out wire for inputting electrical signals to the first electrode and the second electrode, the fan out wire is arranged on the first main surface and located in the area where the light shielding layer is located.

2. The cover plate of claim 1 , wherein the chromogenic material layer is an electrochromic material layer or a cholesteric liquid crystal layer, and
the chromogenic control structure is configured to control the chromogenic material layer to change its color by controlling a change in an applied electric field.

3. The cover plate of claim 1 , wherein the cover plate comprises a plurality of side surfaces, and the first electrode and/or the second electrode are arranged in the groove at an intersection corner between two adjacent side surfaces.

4. The cover plate of claim 3 , wherein the cover plate comprises four side surfaces which are a first side surface, a second side surface, a third side surface, and a fourth side surface that connected orderly in an end-to-end manner, and
wherein the first electrode is arranged in a groove at an intersection corner between the first side surface and the second side surface, the second electrode is arranged in a groove at an intersection corner between the second side surface and the third side surface, the first electrode is arranged in a groove at an intersection corner between the third side surface and the fourth side surface, and the second electrode is arranged in a groove at an intersection corner between the first side surface and the fourth side surface.

5. The cover plate of claim 3 , wherein the cover plate comprises four side surfaces which are a first side surface, a second side surface, a third side surface, and a fourth side surface that connected orderly in an end-to-end manner,
wherein the first side surface and the second side surface constitute a first side surface unit, the third side surface and the fourth side surface constitute a second side surface unit, the first electrode is arranged in a groove at one intersection corner between the first side surface unit and the second side surface unit, and the second electrode is arranged in a groove at the other intersection corner.

6. The cover plate of claim 1 , wherein the first electrode and the second electrode are arranged opposite to each other, and the chromogenic material layer is arranged between the first electrode and the second electrode.

7. The cover plate of claim 1 , wherein a cross section of the groove in a direction perpendicular to an extending direction of the side surface where the groove is located is an inverted trapezoid; or
the cross section of the groove in the direction perpendicular to the extending direction of the side surface where the groove is located is semicircular, and a bottom of the groove is curved.

8. The cover plate of claim 1 , wherein a packaging layer that packages the chromogenic material layer in the groove is arranged on the groove.

9. A display device, comprising a display screen and the cover plate of claim 1 , the cover plate being arranged on a display surface side of the display screen.

10. A method for preparing the cover plate of claim 1 , comprising:
grinding the side surface of the cover plate to form a groove;
pouring the chromogenic material into the groove to form the chromogenic material layer; and
providing the chromogenic control structure in the groove.

11. The method of claim 10 , wherein a cross section of the groove in a direction perpendicular to an extending direction of the side surface where the groove is located is an inverted trapezoid; or
the cross section of the groove in the direction perpendicular to the extending direction of the side surface where the groove is located is semicircular, and a bottom of the groove is curved.

12. The method of claim 10 , wherein the chromogenic material is an electrochromic material or a cholesteric liquid crystal material.

13. The method of claim 12 , wherein the providing the chromogenic control structure in the groove comprises providing at least one first electrode and at least one second electrode in the groove, wherein at least a part of the chromogenic material layer is arranged between the first electrode and the second electrode.

14. The method of claim 10 , further comprising applying sealant on the side surface along the groove to form a packaging layer.

15. The display device of claim 9 , wherein the chromogenic material layer is an electrochromic material layer or a cholesteric liquid crystal layer, and
the chromogenic control structure is configured to control the chromogenic material layer to change its color by controlling a change in an applied electric field.

16. The display device of claim 15 , wherein the cover plate comprises a plurality of side surfaces, and the first electrode and/or the second electrode are arranged in the groove at an intersection corner between two adjacent side surfaces.

17. The display device of claim 9 , wherein a cross section of the groove in a direction perpendicular to an extending direction of the side surface where the groove is located is an inverted trapezoid; or
the cross section of the groove in the direction perpendicular to the extending direction of the side surface where the groove is located is semicircular, and a bottom of the groove is curved.

18. A cover plate applied to a display device, comprising two main surfaces that are arranged opposite to each other and a side surface connecting the two main surfaces,
wherein a groove is formed in the side surface, and a chromogenic material layer and a chromogenic control structure for controlling the chromogenic material layer are arranged in the groove,
wherein the chromogenic control structure comprises at least one first electrode and at least one second electrode, and the first electrode and the second electrode are spaced apart and capable of generating an electric field when different voltages are applied,
wherein the cover plate comprises four side surfaces which are a first side surface, a second side surface, a third side surface, and a fourth side surface that connected orderly in an end-to-end manner, and
wherein the first electrode is arranged in a groove at an intersection corner between the first side surface and the second side surface, the second electrode is arranged in a groove at an intersection corner between the second side surface and the third side surface, the first electrode is arranged in a groove at an intersection corner between the third side surface and the fourth side surface, and the second electrode is arranged in a groove at an intersection corner between the first side surface and the fourth side surface.

Assignees

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

Inventors

• Zhang Zhi
• Zhao Xuemei
• Wang Qingpu
• Yin Li

Classifications

• G02F1/137 Primary

  characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering · CPC title

• G02F1/157 Primary

  Structural association of cells with optical devices, e.g. reflectors or illuminating devices · CPC title

• G02F1/133331

  Cover glasses · CPC title

• G02F1/163

  Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor · CPC title

• G02F1/1533

  structural features not otherwise provided for · CPC title