发明名称 |
LIQUID CRYSTAL DEVICES |
摘要 |
<p>The device comprises a layer of long-pitch cholesteric liquid crystal material of positive dielectric anisotropy. An amount of pleochroic dye is contained between two cell walls bearing electrodes and being surface treated to align liquid crystal molecules in a tilted homogeneous structure. The surface alignment and natural pitch of the cholesteric material are matched to provide a molecular twist of between pi and 2pi radians across the layer with a uniform tilt direction. The ratio of layer thickness d divided by pitch p lies between 0.5 and 1.0, d being less than 20 microns. The device may be switched directly between a light transmissive ON state and a non-transmissive OFF state. The device has a sharp transmission/voltage characteristic and negligible hysterisis.</p> |
申请公布号 |
GB2123163(B) |
申请公布日期 |
1985.12.18 |
申请号 |
GB19830017355 |
申请日期 |
1983.06.27 |
申请人 |
THE SECRETARY OF STATE FOR * DEFENCE |
发明人 |
COLIN MARTIN * WATERS;EDWARD PETER * RAYNES |
分类号 |
G02F1/133;C09K19/02;G02F1/1337;G02F1/1347;G02F1/137;G02F1/139;G09G3/18;G09G3/36;(IPC1-7):G02F1/137 |
主分类号 |
G02F1/133 |
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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