Optical interference type of color display having optical diffusion layer between substrate and electrode

• US 9,025,235 B2
• Filed: 02/01/2008
• Issued: 05/05/2015
• Est. Priority Date: 12/25/2002
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Lin, Wen-Jian
• Primary Examiner(s): Allen, Stephone B
• Assistant Examiner(s): THOMAS, BRANDI N
• Application Number:
  US12/024,815
• Publication Number:
  US 20080137175A1
• Time in Patent Office: 2,650 Days
• Field of Search: 359/295, 359/298, 359/237, 359290-292, 359242-245, 359/254, 359265-271, 359/277
• US Class Current: 359/295
• CPC Class Codes: G02B 26/001 based on interference in an adjustable optical cavity interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26
• CPC Class Codes: G02F 1/29 for the control of the position or the direction of light beams, i.e. deflection

Abstract

An optical interference color display comprising a transparent substrate, an inner-front optical diffusion layer, a plurality of first electrodes, a patterned support layer, a plurality of optical films and a plurality of second electrodes is provided. The inner-front optical diffusion layer is on the transparent substrate and the first electrodes are on the inner-front optical diffusion layer. The patterned support layer is on the inner-front optical diffusion layer between the first electrodes. The optical film is on the first electrodes and the second electrodes are positioned over the respective first electrodes. The second electrodes are supported through the patterned support layer. Furthermore, there is an air gap between the second electrodes and their respective first electrodes.

Claims

1. An optical apparatus, comprising:

a substrate;

a first electrode;

an optical layer configured to alter the optical properties of light, the optical layer between the substrate and the first electrode, the optical layer comprising an optical diffusion layer; and

a second movable electrode, the first electrode between the optical layer and the second movable electrode.

2. The apparatus of claim 1, further comprising a cavity between the first electrode and the second movable electrode.

3. The apparatus of claim 2, wherein the cavity comprises an air gap.

4. The apparatus of claim 1, wherein the second movable electrode is configured to move towards the first electrode.

5. The apparatus of claim 1, further comprising a support over the substrate, wherein the second movable electrode is over the support.

6. The apparatus of claim 1, wherein the optical layer comprises a plurality of films.

7. The apparatus of claim 1, further comprising a dielectric film between the first electrode and the second movable electrode.

8. The apparatus of claim 1, wherein the first electrode and the second movable electrode comprise at least part of an interferometric modulator.

17. The apparatus of claim 1, further comprising an optical film over the first electrode.

19. The apparatus of claim 1, wherein the optical diffusion layer includes surface diffusive features.

9. A method of manufacturing an apparatus, comprising:

disposing an optical layer over a substrate, the optical layer comprising an optical diffusion layer;

disposing a first electrode over both the substrate and the optical layer, such that the optical layer is between the substrate and the first electrode; and

disposing a second movable electrode over the first electrode, such that the first electrode is between the optical layer and the second movable electrode, wherein the optical layer is configured to alter the optical properties of light.

10. The method of claim 9, further comprising forming a cavity between the first electrode and the second movable electrode.

11. The method of claim 10, wherein the cavity comprises an air gap.

12. The method of claim 9, wherein the second movable electrode is configured to move towards the first electrode.

13. The method of claim 9, further comprising forming a support over the substrate.

14. The method of claim 9, wherein the optical layer comprises a plurality of films.

15. The method of claim 9, further comprising disposing a dielectric film over the first electrode, wherein the second movable electrode is disposed over the dielectric film.

16. The method of claim 9, wherein the first electrode and the second movable electrode comprise at least part of an interferometric modulator.

18. The method of claim 9, further comprising disposing an optical film over the first electrode, wherein the second movable electrode is disposed over the optical film.