Bi-stable electrowetting optical element and driving method...

Details Bi-stable electrowetting optical element and driving method... Bi-stable electrowetting optical element and driving method...

2005-06-14

2009-06-16

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S253000, C359S259000

Reexamination Certificate

active

07548363

ABSTRACT:
An optical element used, e.g., in an electrowetting display device having a number of pixels, is arranged in an array. Each optical element includes a cell filled with a polar conductive fluid, such as a water solution, and a non-polar fluid, such as an oil. The cell further includes first and second planar electrodes covered with first and second hydrophobic layers. By applying a voltage between the first fluid and alternately the first or second electrodes, the oil is forced to migrate between the first and second hydrophobic layers. Thus a bi-stable, energy efficient optical element is provided.

REFERENCES:
patent: 7123796 (2006-10-01), Steckl et al.
patent: 7163612 (2007-01-01), Sterling et al.
patent: 7180677 (2007-02-01), Fujii et al.
patent: 0806753 (1997-11-01), None
patent: WO03071347 (2003-08-01), None
Hayes et al: “Video-Speed Electronic Paper Based on Electrowetting”; Nature, MacMillan Journals Ltd. vol. 425, No. 6956, Sep. 25, 2003, pp. 383-385, XP002286158.

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