Method and system for color optimization in a display

• US 7,855,824 B2
• Filed: 01/14/2005
• Issued: 12/21/2010
• Est. Priority Date: 03/06/2004
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Gally, Brian
• Primary Examiner(s): Shalwala; Bipin
• Assistant Examiner(s): Moorad; Waseem
• Application Number:
  US11/036,966
• Publication Number:
  US 20050212738A1
• Time in Patent Office: 2,167 Days
• Field of Search: 359/237, 359290-292, 345690-693
• US Class Current: 359/290
• 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: Y10T 29/49117 Conductor or circuit manufacturing

Abstract

Disclosed herein are iMoD displays optimized by utilizing different materials for one or more different color subpixels. Such optimized displays have improved color gamut over displays where all subpixels are constructed with the same material. Also disclosed are methods for manufacturing such displays and methods for optimizing iMoD displays.

Claims

1. A display comprising a co-planar array of interferometric modulators, wherein a first set of the interferometric modulators are capable of reflecting substantially red light through second order interference and include a material that absorbs substantially blue light reflected through third order interference, and wherein a second set of the interferometric modulators are capable of reflecting a color other than red and do not include said material.

2. The display of claim 1, wherein said material is gold or copper.

3. The display of claim 1, wherein said material is included in movable mirrors of said first set of interferometric modulators.

4. The display of claim 1, comprising a third set of the interferometric modulators that do not include said material, wherein said second set of the interferometric modulators are capable of reflecting substantially blue light and said third set of the interferometric modulators are capable of reflecting substantially green light.

5. A display comprising a co-planar array of interferometric modulators, the interferometric modulators comprising a partially reflective mirror and a movable mirror, wherein the movable mirrors of a first set of the interferometric modulators comprise gold or copper and the movable mirrors of a second set of the interferometric modulators do not comprise gold or copper.

6. The display of claim 5, wherein the first set of the interferometric modulators are capable of reflecting substantially red light.

7. The display of claim 6, wherein the second set of the interferometric modulators are capable of reflecting substantially green or substantially blue light.

8. The display of claim 6, wherein the movable mirrors of a third set of the interferometric modulators do not comprise gold or copper, wherein the second set of the interferometric modulators are capable of reflecting substantially green light and the third set of the interferometric modulators are capable of reflecting substantially blue light.

9. The display of claim 5, wherein the movable mirrors of the second set of interferometric modulators comprise aluminum.

10. The display of claim 5, wherein the movable mirrors of the first set of the interferometric modulators comprise a layer of gold or copper and a layer of aluminum.

11. The display of claim 5, wherein the first set of the interferometric modulators are capable of reflecting substantially red light through second order interference.

12. A method of manufacturing a display, comprising manufacturing an array of interference modulator structures on a same substrate so as to generate a first set of interferometric modulators capable of reflecting substantially red light through second order interference that include a material that absorbs substantially blue light reflected through third order interference, and a second set of interferometric modulators capable of reflecting a color other than red and do not include said material.

13. The method of claim 12, wherein formation of said interference modulator structures comprise deposition and patterning of said material.

14. The method of claim 12, wherein said material is metallic.

15. The method of claim 12, wherein said material is non-metallic.

16. The method of claim 12, wherein said material is positioned adjacent to a dielectric layer.

17. The method of claim 12, wherein said material is positioned adjacent to or is part of a movable mirror.

18. The method of claim 12, wherein said material is positioned adjacent to or is part of a partial reflector.

19. The method of claim 12, wherein said material is positioned adjacent to the substrate.

20. The method of claim 12, wherein said material is selected from the group consisting of gold and copper.

21. The method of claim 12, wherein said manufacturing includes a plurality of material deposition steps, a plurality of patterning steps, and at least one material removal step and wherein at least one of said patterning steps and at least one of said material removal steps are used to generate said interference modulators.