Printable static interferometric images

• US 8,310,758 B2
• Filed: 08/11/2011
• Issued: 11/13/2012
• Est. Priority Date: 05/07/2008
• Status: Expired due to Fees

• Current Assignee: Snaptrack Incorporated (Qualcomm, Inc.)
• Original Assignee: Qualcomm MEMS Technologies Incorporated (Qualcomm, Inc.)
• Inventors: Miles, Mark W., Arbuckle, Brian W., Bita, Ion, Kothari, Manish, Brinkley, Patrick F., Xu, Gang, Khonsari, Nassim, Griffiths, Jonathan C.
• Primary Examiner(s): FONT, FRANK G
• Application Number:
  US13/207,874
• Publication Number:
  US 20110292512A1
• Time in Patent Office: 460 Days
• Field of Search: 359/580, 359/584, 359/589, 347 2- 4
• US Class Current: 359/580
• CPC Class Codes: B41M 3/003 on optical devices, e.g. lens elements; for the production of optical devices production by thermal imaging means B41M5/265
• CPC Class Codes: G02B 5/26 Reflecting filters G02B5/28 takes precedence
• CPC Class Codes: G02B 5/288 comprising at least one thin film resonant cavity, e.g. in bandpass filters
• CPC Class Codes: Y10S 359/90 Methods

Abstract

A static interferometric image device including a plurality of solidified liquid layers is formed over a substrate by an inkjet process such that the layers are lateral to one another. In some embodiments, the substrate includes pre-defined cavities, and the liquid layers are formed in the cavities. In other embodiments, the substrate includes a substantially planar, stepped, or continuously transitioning surface, and the solidified liquid layers are formed on the surface. Optical fillers or spacers are provided for defining interferometric gaps between absorbers and reflectors in the display device, based at least partially on an image that the display device is designed to display.

Claims

1. A static interferometric image device comprising:

a substrate including a first surface, the substrate including a lattice structure defining cavities having substantially the same depth as one another;

an absorber layer formed over the first surface;

a stationary reflective layer formed over the first surface, the reflective layer being vertically spaced apart from the absorber layer; and

a plurality of solidified optical fillers formed in the cavities, the plurality of solidified optical fillers being interposed between the absorber layer and the reflective layer, the plurality of solidified optical fillers being formed of an at least partially transparent material, the plurality of solidified optical fillers being positioned laterally adjacent to one another to form an array over the first surface of the substrate, wherein the plurality of solidified optical fillers are configured to define a pattern of different optical pathlengths between the absorber layer and the reflective layer, based on an image which the static interferometric image device is configured to display.

2. The device of claim 1, wherein the lattice structure is integrally formed with and of the same material as the substrate.

3. The device of claim 1, wherein the lattice structure is formed of a material different from the substrate.

4. The device of claim 3, further including an adhesive layer between the lattice structure and the first surface of the substrate.

5. The device of claim 1, wherein the plurality of solidified optical fillers are formed of the same material, and wherein one or more of the solidified optical fillers have a different thickness corresponding to a different optical pathlength and different interferometric color from the others of the solidified optical fillers.

6. The device of claim 1, wherein the plurality of solidified optical fillers comprise a first solidified optical filler formed of a first material, and a second solidified optical filler formed of a second material, and wherein the first and second materials have different indices of refraction.

10. The device of claim 1, wherein the reflective layer is positioned over the absorber layer.

11. The device of claim 1, wherein the reflective layer is positioned below the absorber layer.

12. The device of claim 1, further including a substantially transparent polymer layer between the reflective layer and the absorber layer, the polymer layer extending over substantially the entire portion of the pixel array region.

7. A static interferometric image device comprising:

a substrate including a first surface including a substantially planar pixel array region;

an absorber layer formed over the pixel array region;

a reflective layer formed over the pixel array region, the reflective layer being vertically spaced apart from the absorber layer; and

a plurality of solidified optical fillers interposed between the absorber layer and the reflective layer, the plurality of solidified optical fillers being formed of an at least partially transparent material, the plurality of solidified optical fillers being positioned laterally adjacent to one another to form an array over the pixel array region, wherein the plurality of solidified optical fillers are configured to define a pattern of optical pathlengths between the absorber layer and the reflective layer, based on an image which the static interferometric image device is configured to display.

8. The device of claim 7, further including a black matrix including a plurality of openings over the pixel array region, wherein the plurality of solidified optical fillers fills at least part of the plurality of openings.

9. The device of claim 7, further including a transparent layer between the absorber layer and the reflective layer, wherein the plurality of solidified optical fillers are laterally spaced apart from one another, wherein the transparent layer is configured to define an optical path for interferometrically producing black color between the absorber layer and the reflective layer.

14. The device of claim 7, wherein the plurality of solidified optical fillers are formed of the same material, and wherein one or more of the solidified optical fillers have a different thickness from the others of the solidified optical fillers.

15. The device of claim 7, wherein the plurality of solidified optical fillers comprise a first solidified optical filler formed of a first material, and a second solidified optical filler formed of a second material, and wherein the first and second materials have different indices of refraction.

16. The device of claim 7, wherein the reflective layer is positioned over the absorber layer.

17. The device of claim 7, wherein the reflective layer is positioned below the absorber layer.

18. The device of claim 7, further including a substantially transparent polymer layer between the reflective layer and the absorber layer, the polymer layer extending over substantially the entire portion of the first surface.

13. A static interferometric image device comprising:

a substrate including a plurality of cavities having substantially the same depth, the cavities having bottom surfaces;

an absorber layer formed over the substrate;

a stationary reflective layer opposing the absorber layer, the reflective layer being vertically spaced apart from the absorber layer, wherein at least one of the absorber layer and the reflective layer is positioned in the cavities; and

a plurality of solidified spacers formed in the cavities, the solidified spacers being contacted by and interposed between the bottom surfaces of the cavities and the at least one of the absorber layer and reflective layer, wherein the plurality of solidified spacers are configured to position the at least one of the absorber layer and reflective layer to define a pattern of optical paths between the absorber layer and the reflective layer, based on an image which the static interferometric image device is configured to display.

19. The device of claim 13, wherein the stationary reflective layer is positioned over the absorber layer.

20. The device of claim 13, wherein the stationary reflective layer is positioned below the absorber layer.

21. The device of claim 13, further including a plurality of solidified optical fillers positioned over the plurality of solidified spacers.

22. The device of claim 21, wherein the plurality of solidified optical fillers are formed of the same material, and wherein one or more of the solidified optical fillers have a different thickness corresponding to a different optical pathlength and different interferometric color from the others of the solidified optical fillers.

23. The device of claim 21, wherein the plurality of solidified optical fillers comprise a first solidified optical filler formed of a first material, and a second solidified optical filler formed of a second material, and wherein the first and second materials have different indices of refraction.