Color changeable pixel

• US 20050068606A1
• Filed: 07/29/2004
• Published: 03/31/2005
• Est. Priority Date: 09/26/2003
• Status: Active Grant

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Prime View International Company Limited (E Ink Holdings Incorporated)
• Inventors: Tsai, Hsiung-Kuang
• Granted Patent: US 7,006,272 B2
• Time in Patent Office: Days
• US Class Current: 359/290
• CPC Class Codes: G02B 26/002 the movement or the deformation controlling the frequency of light, e.g. by Doppler effect

Abstract

A color changeable pixel comprises a first plate, a second plate and a third plate. The three plates are settled in parallel. The second plate is a deformable and reflective plate. An incident light from one side of the first plate is modulated and only specific frequency light reflects by the second plate. The frequency of the reflected light is related to the distance between the first plate and the second plate. The second plate shifts by the voltage added on the third plate to change the distance between the first plate and the second plate. Therefore, the frequency of the reflected light is altered.

Claims

1-12. -12. (canceled)

13. An optical interference color planar display, comprising:

a control circuit;

a driver circuit; and

a modulator array comprising;

a first plate;

a second plate; and

an operating plate;

at least one first post located between the operating plate and the second plate; and

at least one second post located between the first plate and the second plate, wherein a cavity is formed between the first plate and the second plate, and an incident light from one side of the first plate is modulated and a reflected light of only specific frequency is reflected by the second plate, and the second plate shifts along the first post and the second post by a voltage added on the operating plate so as to change the distance of the cavity, thereby changing the frequency of the reflected light;

wherein the control circuit connects to the operating plate to control the length of the cavity of a modulator of the modulator array for reflecting the reflected light with a special wave length, and the driver circuit connects to the first plate and the second plate to control the on or off of the modulator.

14. The optical interference color planar display of claim 13, wherein the first plate at least comprises:

a substrate;

an absorption layer; and

a dielectric layer.

15. The optical interference color planar display of claim 14, wherein the substrate is a transparent conductive substrate.

16. The optical interference color planar display of claim 14, wherein a material for forming the dielectric layer is silicon oxide, silicon nitride or metal oxide.

17. The optical interference color planar display of claim 14, wherein the absorption layer is made from metal.

18. The optical interference color planar display of claim 14, wherein the substrate is made form ITO glass or IZO glass.

19. The optical interference color planar display of claim 13, wherein the first plate and the second plate are selected from the group consisting of narrowband mirror, broadband mirror, non-metal mirror, metal mirror and the combination thereof.

20. The optical interference color planar display of claim 13, wherein the second plate is a deformable plate.

21. The optical interference color planar display of claim 13, wherein the second plate is a moveable plate.

22. The optical interference color planar display of claim 13, wherein the second plate at least comprises a dense material or a semi-transparent material.

23. The optical interference color planar display of claim 22, wherein the semi-transparent material is ITO or IZO.

24. (canceled).