发明名称 |
Element with variable optical properties, for use e.g. in back-projection screens operating by transmission, comprises an electrically operated system with variable light diffusion, e.g. a liquid crystal system, and light-absorbing elements |
摘要 |
An element with variable optical properties (I) based on (a) an electrically operated system with variable light diffusion based on optical valve or liquid crystal systems, a system with particles in suspension or a holographic or thermotropic system (a') also incorporates (b) element(s) showing light absorption, at least in the visible range. |
申请公布号 |
FR2827397(A1) |
申请公布日期 |
2003.01.17 |
申请号 |
FR20010009316 |
申请日期 |
2001.07.12 |
申请人 |
SAINT-GOBAIN GLASS FRANCE |
发明人 |
MATHEY GREGOIRE;GIRON JEAN CHRISTOPHE |
分类号 |
G03B21/60;G02F1/01;G02F1/13;G02F1/1334;G02F1/1335 |
主分类号 |
G03B21/60 |
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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