Optical device and liquid-crystal display apparatus

Details Optical device and liquid-crystal display apparatus Optical device and liquid-crystal display apparatus

2006-12-12

2006-12-12

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within cholesteric phase

C349S098000

Reexamination Certificate

active

07148946

ABSTRACT:
An optical device including a laminate of cholesteric liquid-crystal layers in which the wavelength ranges of selective reflection of circularly polarized light beams are out of visible light region and which are combined so that circularly polarized light beams transmitted through the cholesteric liquid-crystal layers to be left-handed and right-handed are inverted to each other. A liquid-crystal display apparatus including a vertically aligned liquid-crystal cell, polarizers disposed on opposite surfaces of the liquid-crystal cell, and one or two optical devices defined above and interposed between the liquid-crystal cell and either or each of the polarizers.

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