IP Library › Granted Patent US 9,366,895
Granted Patent B2
US 9,366,895 · App. 12/375,511 · Granted Jun 14, 2016

Liquid crystal display with polymer layer of varying thickness and method of producing such a layer

Inventors: Qin Liu (Corvallis, OR); Bradley Chung (Corvallis, OR); John Christopher Rudin (Bristol, GB); Frank E. Glass (Albany, OR)
Assignee: Hewlett-Packard Development Company, L.P.
G02F1/133371G02F1/133345G02F2202/022Y10T428/31515
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Quick Facts
Patent No.
US 9,366,895
App. No.
12/375,511
Granted
Jun 14, 2016
Kind
B2
Abstract

Various methods and apparatus relating to a multi-level layer ( 140, 440, 540, 640, 740 ) are disclosed.

Claims (26)

1. An apparatus comprising:

a first electrode;

a second electrode;

a first polymeric layer between the first electrode and the second electrode, the first polymeric layer having portions, each portion including a specific amount of a cross-linking agent, wherein the each portion has a distinct thickness for the specific amount of cross-linking agent:

an electro-optical material between the first polymeric layer and the first electrode; and

a second polymeric layer on an opposite side of the electro-optical material as the first polymeric layer, the second polymeric layer having second portions, each portion of the second polymeric layer including a specific amount of a cross-linking agent, wherein the each portion of the second polymeric layer has a distinct thickness for the specific amount of cross-linking agent, wherein the second polymeric layer includes multiple levels on the same side of the second polymeric layer as the first electrode, wherein the first polymeric layer includes multiple levels on the same side of the first polymeric layer as the second electrode, wherein the multiple levels of the first polymeric layer face in a first direction orthogonal to and towards the second electrode and wherein the multiple levels of the second polymeric layer face in a second direction orthogonal to and towards the first electrode, the second direction being opposite to the first direction.

2. An apparatus comprising:

a first electrode;

a second electrode;

a first polymeric layer between the first electrode and the second electrode, the first polymeric layer having portions, each portion including a specific amount of a cross-linking agent, wherein the each portion has a distinct thickness for the specific amount of cross-linking agent;

an electro-optical material between the first polymeric layer and the first electrode; and

a second polymeric layer on an opposite side of the electro-optical material as the first polymeric layer, the second polymeric layer having second portions, each portion of the second polymeric layer including a specific amount of a cross-linking agent, wherein the each portion of the second polymeric layer has a distinct thickness for the specific amount of cross-linking agent, wherein the second polymeric layer includes multiple levels on the same side of the second polymeric layer as the first electrode, wherein the first polymeric layer includes multiple levels facing towards the first electrode and wherein the multiple levels of the second polymeric layer face towards the first electrode.

3. The apparatus of claim 2 , wherein the first electrode comprises a layer of electrically conductive material having a plurality of levels, the plurality levels undulating in unison with the multiple levels of the second polymeric layer.

4. The apparatus of claim 3 , wherein the layer of electrically conductive material contacts the multiple levels of the second polymeric material.

5. The apparatus of claim 2 , wherein the first electrode comprises a first layer of electrically conductive material having a plurality of levels, the plurality of levels undulating in unison with the multiple levels of the second polymeric layer.

6. The apparatus of claim 5 , wherein the first layer of electrically conductive material contacts the multiple levels of the second polymeric material.

7. The apparatus of claim 6 , wherein the second electrode comprises a second layer of electrically conductive material contacting the multiple levels of the first polymeric material and having a plurality of levels undulating in unison with the multiple levels of the first polymeric layer.

8. The apparatus of claim 2 , wherein the first polymeric layer includes at least three portions.

9. The apparatus of claim 2 , wherein the first polymeric layer includes a photo-polymer.

10. The apparatus of claim 2 , wherein the first polymeric layer includes bisphenol A epoxy resin.

11. The apparatus of claim 2 , wherein the first polymeric layer includes at least 20% by solids of bisphenol A diglycidyl ether (BADGE) relative to 100% by solids of the first layer.

12. The apparatus of claim 2 , wherein the first polymeric layer is transparent and wherein the first electrode is transparent.

13. The apparatus of claim 2 , wherein the first polymeric layer is transparent and wherein the first electrode is reflective.

14. The apparatus of claim 2 , wherein the first polymeric layer is opaque.

15. The apparatus of claim 2 , wherein at least a percentage of at least one portion of the second portions of the second polymeric layer is ramped.

16. The apparatus of claim 2 , wherein the each portion has a different degree of cross-linking.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 11, 2009
From: LIU, QIN; CHUNG, BRADLEY; RUDIN, JOHN CHRISTOPHER; GLASS, FRANK E.
To: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Reel/Frame 022673/0159 →
Continuity (1)
Related Publication 20090274911A1 · Nov 5, 2009