Transflective electro-wetting display device

• US 20090027760A1
• Filed: 07/25/2008
• Published: 01/29/2009
• Est. Priority Date: 07/25/2007
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: Innolux Display Corporation (InnoLux Corporation)
• Inventors: Chen, Sung-Yen, Wang, Chien-Wen
• Granted Patent: US 8,027,080 B2
• Time in Patent Office: Days
• US Class Current: 359/291
• CPC Class Codes: G02B 26/005 based on electrowetting

Abstract

An exemplary transflective electro-wetting display (EWD) device includes an upper substrate, a lower substrate opposite to the upper substrate, a first polar liquid disposed between the upper and lower substrates, a second, colored, non-polar liquid disposed between the upper and lower substrates, and a reflective pattern disposed at the lower substrate. The second liquid is immiscible with the first liquid. An area of the reflective pattern covered by the second liquid varies according to an area of the lower substrate covered by the second liquid.

Claims

1. A transflective electro-wetting display device, comprising:

an upper substrate;

a lower substrate opposite to the upper substrate;

a first polar liquid disposed between the upper and lower substrates;

a second, colored, non-polar liquid disposed between the upper and lower substrates, and the second liquid being immiscible with the first liquid; and

a reflective pattern disposed at the lower substrate;

wherein an area of the reflective pattern covered by the second liquid varies according to an area of the lower substrate covered by the second liquid.

2. The transflective electro-wetting display device as claimed in claim 1, wherein the transflective electro-wetting display device comprises a reflective region and a transmission region, and the reflective region corresponds to reflective pattern.

3. The transflective electro-wetting display device as claimed in claim 2, wherein an area of the transmission region covered by the second liquid varies according to the area of the lower substrate covered by the second liquid.

4. The transflective electro-wetting display device as claimed in claim 3, wherein the area of the transmission regions covered by the second liquid varies according to a direct proportional function relate to the area of lower substrate covered by the second liquid.

5. The transflective electro-wetting display device as claimed in claim 3, a ratio of the area of the transmission region covered by the second liquid to the area of the reflective region covered by the second liquid is in a range of 0.2 to 10.

6. The transflective electro-wetting display device as claimed in claim 1, further comprising a plurality of pixel units, and each pixel unit defining a storage region for containing the second liquid, an area of the lower substrate covered by the second liquid being adjusted via controlling the second liquid to concentrate in the storage region.

7. The transflective electro-wetting display device as claimed in claim 6, wherein the reflective pattern comprises a plurality of reflective members, the reflective members extend from the storage region to another side of the pixel unit opposite to the storage region.

8. The transflective electro-wetting display device as claimed in claim 7, wherein the storage region is disposed at a corner of the pixel unit, and each reflective member has a rhombic shape.

9. The transflective electro-wetting display device as claimed in claim 7, wherein the storage region is disposed at a corner of the pixel unit, and each reflective member has a plurality of parallel, individual strip portions.

10. A transflective electro-wetting display device, comprising:

;

an upper substrate;

a lower substrate opposite to the upper substrate;

a first polar liquid disposed between the upper and lower substrates;

a second, colored, non-polar liquid disposed between the upper and lower substrates, and the second liquid being immiscible with the first liquid;

a transparent electrode disposed at a surface of the lower substrate; and

a reflective pattern disposed at the lower substrate;

wherein gray scales of images displayed by the reflective pattern vary according to video signals supplying to the first liquid and the transparent electrode.

11. The transflective electro-wetting display device as claimed in claim 10, wherein the transflective electro-wetting display device comprises a reflective region and a transmission region, and the reflective region corresponds to reflective pattern.

12. The transflective electro-wetting display device as claimed in claim 11, wherein an area of the transmission region covered by the second liquid varies according to the area of the lower substrate covered by the second liquid.

13. The transflective electro-wetting display device as claimed in claim 12, wherein the area of the transmission regions covered by the second liquid varies according to a direct proportional function relate to the area of lower substrate covered by the second liquid.

14. The transflective electro-wetting display device as claimed in claim 12, a ratio of the area of the transmission region covered by the second liquid to the area of the reflective region covered by the second liquid is in a range of 0.2 to 10.

15. The transflective electro-wetting display device as claimed in claim 10, further comprising a plurality of pixel units, and each pixel unit defining a storage region for containing the second liquid, an area of the lower substrate covered by the second liquid being adjusted via controlling the second liquid to concentrate in the storage region.

16. The transflective electro-wetting display device as claimed in claim 15, wherein the reflective pattern comprises a plurality of reflective members, the reflective members partially overlap with the storage region.

17. The transflective electro-wetting display device as claimed in claim 16, wherein the storage region is disposed at a side of the pixel unit, and each reflective member has a rectangular shape.

18. The transflective electro-wetting display device as claimed in claim 16, wherein the storage region is disposed at a corner of the pixel unit, and each reflective member defines a dot-pattern.