Diffusively reflective circular polarizer formed by thermo...

Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only

Reexamination Certificate

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C349S176000, C349S112000

Reexamination Certificate

active

07095466

ABSTRACT:
The present invention relates to a circular polarizer, more specifically, to a diffusively reflective circular polarizer (DRCP), which is characterized by broadband reflection and transmission over a hemispheric viewing angle. A thermo phase separation process of a cholesteric liquid crystal polymer system creates the DRCP film. As a multi-functional optical material, the DRCP film combines the merits of polarizer, reflector and diffuser to form an all-in-one component in the electro-optical industry. Moreover, since the novel film has a “silver white” appearance and super “hiding power”, it will initiate many other applications.

REFERENCES:
patent: 5437811 (1995-08-01), Doane et al.
patent: 5796454 (1998-08-01), Ma
patent: 6462805 (2002-10-01), Wu et al.
patent: 6757039 (2004-06-01), Ma
patent: 6873393 (2005-03-01), Ma

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