| 摘要 |
PROBLEM TO BE SOLVED: To obtain an element which shows high reliability and high contrast by placing a mixture of a liquid crystal and an uncured hardenable compound containing a mesogen structure between substrates with a pair of electrodes and curing thereof to form a liquid crystal/hardened material composite layer. SOLUTION: A mixture of a liquid crystal and an uncured hardenable compound is placed between substrates with a pair of electrodes keeping a clearance of 4-50μm, at least one of substrates being transparent, and is hardened by photo irradiation or heating to form a liquid crystal/hardened material composite layer and then give a liquid crystal photo element. A catalyst for photo hardening or thermosetting reaction is mixed with the mixture of the liquid crystal and the uncured hardenable compound, the amount thereof being not more than 20 wt.% of the hardenable compound and a chiral agent is also mixed therewith. The hardenable compound is a compound represented by formula I containing polyphenylene group represented by formula II having two valences. In the formula, A1 and A2 are each acryloyl, glycidyl or the like; R1 and R2 are each a 2-6C alkylene; Z is a portion of a mesogen structure having two valences; and (n) and (m) are each integers of 1-10.
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