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Title:
OPTICAL SHEETS CONTAINING CHOLESTERIC LIQUID CRYSTAL LAYER AND DATA RECORDING MEDIA, DATA RECORDING METHOD AND DATA DISCRIMINATING METHOD BY USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2002/010807
Kind Code:
A1
Abstract:
Optical sheets having an unclouded and uniform cholesteric liquid crystal layer immobilized thereon relatively regardless of the chemical species of the cholesteric liquid crystals. These optical sheets have a structure wherein a cholesteric liquid crystal layer consisting of liquid crystals immobilized by a crosslinking reaction is formed on a substrate, characterized in that the cholesteric liquid crystal layer comprises a monodomain structure obtained by reacting a steroid with a liquid crystal composition containing reactive liquid crystals.

Inventors:
MIYAMOTO TSUYOSHI (JP)
Application Number:
PCT/JP2001/005630
Publication Date:
February 07, 2002
Filing Date:
June 29, 2001
Export Citation:
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Assignee:
SHISEIDO CO LTD (JP)
MIYAMOTO TSUYOSHI (JP)
International Classes:
G02B5/20; B41M5/36; C08J7/04; G02B5/18; G02B5/26; G02B5/30; G02F1/13; G03H1/22; (IPC1-7): G02B5/30; B41M5/26; B41M5/36; G02B5/18; G02B5/32; G03H1/18; G06K7/00; G11B7/24
Domestic Patent References:
WO1999034242A11999-07-08
Foreign References:
JP2000169747A2000-06-20
JPS6351193A1988-03-04
JPH02117888A1990-05-02
US5834064A1998-11-10
JPS6215501A1987-01-23
JPS56139506A1981-10-31
JP2001004822A2001-01-12
JP2001004832A2001-01-12
US4893906A1990-01-16
EP0435029A21991-07-03
JPH11277957A1999-10-12
US6061122A2000-05-09
JPH1142875A1999-02-16
JP2000001071A2000-01-07
JP2001159708A2001-06-12
US4780383A1988-10-25
EP0860718A21998-08-26
Attorney, Agent or Firm:
Iwahashi, Yuji (Higashikanagawa Kanagawa-ku Yokohama-shi Kanagawa, JP)
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