IMPROVEMENTS IN ELECTRO-OPTIC DISPLAYS

• US 20060176267A1
• Filed: 03/24/2006
• Published: 08/10/2006
• Est. Priority Date: 07/24/2003
• Status: Active Grant

• Current Assignee: E Ink Holdings Incorporated
• Original Assignee: E Ink Holdings Incorporated
• Inventors: LeCain, Richard D., Duthaler, Gregg M., Sohn, Seungman, Chen, Eva, Doshi, Harit, Pang, Simon, Honeyman, Charles H.
• Granted Patent: US 7,636,191 B2
• Time in Patent Office: Days
• US Class Current: 345/107
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

An electro-optic display comprises first and second substrates and a lamination adhesive layer and a layer of an electro-optic material disposed between the first and second substrates, the lamination adhesive layer having a thickness of from about 14 to about 25 μm.

Claims

1. An electro-optic display comprising:

a backplane comprising at least one electrode;

a layer of electro-optic material; and

a lamination adhesive disposed between the backplane and the layer of electro-optic material, the lamination adhesive comprising an adhesion promoter effective to increase the adhesion between the lamination adhesive and the backplane.

2. An electro-optic display according to claim 1 wherein the adhesion promoter comprises any one or more of 1-propanamine, 3-aminopropyltrimethoxysilane, 3-aminopropyldimethylethoxysilane, and hexamethyldisilizane.

3. An electro-optic display according to claim 1 wherein the electro-optic material comprises a particle-based electrophoretic material comprising a suspending fluid and a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the electrophoretic material.

4. An electro-optic display according to claim 3 wherein the electrophoretic material is an encapsulated electrophoretic material in which the suspending fluid and the electrically charged particles are encapsulated within a plurality of capsules, each of the capsules having a capsule wall.

5. An electro-optic display according to claim 1 wherein the electro-optic material comprises a rotating bichromal member electro-optic material.

6. An electro-optic display according to claim 1 wherein the electro-optic material comprises an electrochromic electro-optic material.

7. A front plane laminate for forming an electro-optic display, the front plane laminate being an article of manufacture comprising, in order, a light-transmissive electrically-conductive layer, a layer of an encapsulated electrophoretic material comprising a plurality of capsules, each capsule comprising a capsule wall, a suspending fluid encapsulated within the capsule wall and a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the electrophoretic material, and a lamination adhesive layer, wherein the lamination adhesive layer has a peak to valley roughness not greater than about 15 μ

m.

8. A front plane laminate according to claim 7 wherein the lamination adhesive layer has a peak to valley roughness not greater than about 10 μ

m.

9. A front plane laminate according to claim 7 wherein the lamination adhesive layer has a peak to valley roughness not greater than about 5 μ

m.

10. A front plane laminate according to claim 7 wherein the front substrate has a thickness not greater than about 20 mil.

11. A front plane laminate according to claim 10 wherein the front substrate has a thickness not greater than about 10 mil.

12. A front plane laminate according to claim 7 further comprising a release sheet covering the lamination adhesive.

13. A front plane laminate according to claim 12 wherein the release sheet has a thickness not greater than about 15 mil.

14. A front plane laminate according to claim 13 wherein the release sheet has a thickness not greater than about 10 mil.

15. A front plane laminate for forming an electro-optic display, the front plane laminate being an article of manufacture comprising, in order, a light-transmissive electrically-conductive layer, a layer of an encapsulated electrophoretic material comprising a plurality of capsules, each capsule comprising a capsule wall, a suspending fluid encapsulated within the capsule wall and a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the electrophoretic material, and a lamination adhesive layer, wherein the lamination adhesive layer has local surface angles not greater than about 15°

from the horizontal.

16. A front plane laminate according to claim 15 wherein the lamination adhesive layer has local surface angles not greater than about 10°

from the horizontal.

17. A front plane laminate according to claim 16 wherein the lamination adhesive layer has local surface angles not greater than about 5°

from the horizontal.

18. A front plane laminate according to claim 15 wherein the front substrate has a thickness not greater than about 20 mil.

19. A front plane laminate according to claim 18 wherein the front substrate has a thickness not greater than about 10 mil.

20. A front plane laminate according to claim 15 further comprising a release sheet covering the lamination adhesive.

21. A front plane laminate according to claim 20 wherein the release sheet has a thickness not greater than about 15 mil.

22. A front plane laminate according to claim 21 wherein the release sheet has a thickness not greater than about 10 mil.