Preparation method of chiral nematic liquid crystal...

Details Preparation method of chiral nematic liquid crystal... Preparation method of chiral nematic liquid crystal...

2005-02-08

2005-02-08

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With viewing layer of specified composition

C428S001100, C252S299010, C349S078000, C349S175000, C349S176000, C349S185000

Reexamination Certificate

active

06852375

ABSTRACT:
The present invention is based on a chiral nematic liquid crystal composition which shows cholesteric liquid crystal phase and be able to reflect light in visible region selectively, comprising:a nematic liquid crystal material;a first chiral material with shift direction of selective reflection wavelength toward long wavelength direction depending on temperature;and a second chiral material with shift direction of selective reflection wavelength toward short wavelength direction depending on temperature;wherein at least one chiral material between the first chiral material and the second chiral material comprises two or more chiral compounds, and relates to a preparation method of the above chiral nematic liquid crystal composition and a (layered-type) liquid crystal display using the same.

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