Liquid crystal compositions, polarization selective...

Details Liquid crystal compositions, polarization selective... Liquid crystal compositions, polarization selective...

2005-06-28

2005-06-28

Wu, Shean C (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C428S001300, C428S001310, C252S299010, C349S096000, C349S171000, C349S172000, C349S194000

Reexamination Certificate

active

06911238

ABSTRACT:
A novel polarization selective membrane is disclosed. The membrane comprises a liquid crystal molecule having a helical structure and selectively transmits specific polarized light and selectively reflects the other polarized light. The helical axis of the helical structure is practically oriented in the normal direction of the membrane plane, and the angle between the helical axis of the helical structure and the long axis of the liquid crystal molecules is from 5° to 85°. The membrane may be prepared by using a composition comprising a compound represented by Formula (I): wherein X represents a group having an optically active site, M represents a group having at least one aromatic carbocycle or aromatic heterocycle, Y1and Y2independently represent a bivalent group; R1to R3independently represent a hydrogen atom or an alkyl group, R represents an alkyl group

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V. Vill et al, “Ferroelektrische Flüssigkristall-Mischungen mit Kohlenhydrat-Derivaten als Dotlerstoffe”;Z. Naturforsch., 44a, pp. 675-679 (1989).

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