发明名称 |
Liquid crystal materials |
摘要 |
Novel liquid crystal materials are provided having the general formula <IMAGE> where A is a 4-alkylphenyl group and B is a 2-(6-alkyl)naphthyl group, or vice versa, wherein the alkyl groups in A and B may be the same or different. These materials have a dielectric anisotropy sign change at moderate frequencies, i.e., in the range 1kHz to 50kHz and are thus useful for twisted nematic device cells of the frequency switching type.
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申请公布号 |
US4119558(A) |
申请公布日期 |
1978.10.10 |
申请号 |
US19770821919 |
申请日期 |
1977.08.04 |
申请人 |
THE SECRETARY OF STATE FOR DEFENCE IN HER BRITANNIC MAJESTY"S GOVERNMENT OF THE UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND |
发明人 |
COATES, DAVID;GRAY, GEORGE WILLIAM |
分类号 |
C07C69/90;C07C43/20;C07C45/46;C07C51/29;C07C69/773;C09K19/32;C09K19/46;G02F1/13;(IPC1-7):C09K3/34;C07C69/76;C07C69/78 |
主分类号 |
C07C69/90 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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