Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
2005-08-02
2005-08-02
Chowdhury, Tarifur R. (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S088000, C349S086000
Reexamination Certificate
active
06924870
ABSTRACT:
A liquid crystal diffractive light valve includes: a pair of opposed substrates wherein one of the substrates is a silicon wafer with associated electronics. The other substrate has an electrode layer facing the silicon substrate. And a ultraviolet curable composite material is disposed between the substrates which is then phase separated to form polymer walls having liquid crystal directors fixed therein regardless of application of an electric field across the electrode layers, and wherein pixel regions are formed between the polymer walls. The pixel regions have liquid crystal directors which are movable when an electric field is applied across the electrode layers. Application of an electric field allows for generation of phase differences between the wall and pixel regions to allow for Liquid Crystal on Silicon devices to be used as diffractive light valves.
REFERENCES:
patent: 4729640 (1988-03-01), Sakata
patent: 4850681 (1989-07-01), Yamanobe et al.
patent: 5473450 (1995-12-01), Yamada et al.
patent: 5880801 (1999-03-01), Scherer et al.
patent: 6175399 (2001-01-01), Mitsui et al.
Bos Philip
Chung David B.
Wang Bin
Chowdhury Tarifur R.
Duong Thoi V.
Fay Sharpe Fagan Minnich & McKee LLP
Kent State University
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