ELECTROPHORETIC DISPLAY

• US 20120307343A1
• Filed: 05/15/2012
• Published: 12/06/2012
• Est. Priority Date: 06/03/2011
• Status: Abandoned Application

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: WANG, Yi-Ching, TSAI, Yuan-Chih, SHEN, Chi-Tsan, LAI, Chin-Chuan, CHEN, Lee-Tying
• Application Number:
  US13/471,481
• Publication Number:
  US 20120307343A1
• Time in Patent Office: Days
• US Class Current: 359/296
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/16756 Insulating layers
• CPC Class Codes: G02F 1/16766 for active matrices
• CPC Class Codes: G02F 1/1677 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 1/1681 having two or more microcells partitioned by walls, e.g. of microcup type
• CPC Class Codes: G02F 2201/50 Protective arrangements
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

Disclosed herein is an electrophoretic display, which includes a first substrate, an electrophoretic layer, a second substrate, a stress controlling layer and an adhesive layer. The first substrate includes at least one active device and at least one pixel electrode electrically coupled to the active device. The electrophoretic layer is disposed above the pixel electrode. The second substrate is disposed above the electrophoretic layer. The stress controlling layer is formed on a lower surface of the second substrate. The adhesive layer is disposed between the surface stressed layer and the electrophoretic layer, and is in contact with the stress controlling layer and the electrophoretic layer. The adhesion between the stress controlling layer and the adhesive layer is about 75% to 125% of the adhesion between the electrophoretic layer and the adhesive layer.

Claims

1. An electrophoretic display, comprising:

a first substrate having at least one active device and at least one pixel electrode electrically connected to the active device;

an electrophoretic layer disposed over the pixel electrode;

a second substrate arranged over the electrophoretic layer;

a stress controlling layer disposed on a lower surface of the second substrate; and

an adhesive layer disposed between the stress controlling layer and the electrophoretic layer, and in contact with the stress controlling layer and the electrophoretic layer;

wherein an adhesion strength between the stress controlling layer and the adhesive layer is about 75% to about 125% of an adhesion strength between the electrophoretic layer and the adhesive layer.

2. The electrophoretic display according to claim 1, wherein the adhesion strength between the stress controlling layer and the adhesive layer is about 85% to about 115% of the adhesion strength between the electrophoretic layer and the adhesive layer.

3. The electrophoretic display according to claim 1, wherein the adhesion strength between the stress controlling layer and the adhesive layer is greater than or equal to the adhesion strength between the electrophoretic layer and the adhesive layer.

4. The electrophoretic display according to claim 1, wherein the stress controlling layer is made of an insulating fluorine-containing polymer.

5. The electrophoretic display according to claim 1, wherein the stress controlling layer has a thickness of about 0.2 μ

m to about 2 μ

m.

6. The electrophoretic display according to claim 1, wherein the electrophoretic layer comprises a polyethylene terephthalate (PET) substrate and a plurality of electrophoretic elements disposed on a lower surface of the polyethylene terephthalate substrate, and the polyethylene terephthalate substrate is in contact with the adhesive layer.

7. The electrophoretic display according to claim 6, wherein each of the electrophoretic elements is a microcup electrophoretic element or a microcapsule electrophoretic element.

8. The electrophoretic display according to claim 1, wherein the adhesive layer is made of a photo-curable resin.

9. The electrophoretic display according to claim 1, wherein the second substrate comprises:

a transparent substrate;

a color resist layer disposed on the transparent substrate; and

a transparent electrode layer disposed on the color resist layer;

wherein the stress controlling layer is disposed on the transparent electrode layer.

10. The electrophoretic display according to claim 1, wherein the active device is a thin film transistor or a metal oxide semiconductor transistor.