Retarders, circular polarizer and processes for preparing them

Details Retarders, circular polarizer and processes for preparing them Retarders, circular polarizer and processes for preparing them

2006-10-31

2006-10-31

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C428S001300, C349S117000, C349S121000, C349S098000

Reexamination Certificate

active

07128951

ABSTRACT:
A retarder and circular polarizer are disclosed. They comprise at least two adjacent layers respectively formed of a composition comprising a liquid-crystalline compound, in which the liquid-crystalline molecules are fixed in an alignment state disposed on or above a substrate wherein no alignment layer is substantially disposed between the two layers. As one embodiment of the present invention, the retarder wherein the lower layer is formed of a composition comprising a liquid-crystalline compound and a non-crystalline polymer is also disclosed.

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patent: 6824838 (2004-11-01), Kawata et al.
patent: 2004/0109114 (2004-06-01), Takeuchi et al.
patent: 0 860 716 (1998-08-01), None
patent: 11-148080 (1999-06-01), None
Search Report issued in European Patent Application No. EP 03 01 7514, Nov. 24, 2003.

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