| 发明名称 |
PROJECTION DEVICE |
| 摘要 |
Projection device based on a reflective LCD display, in which the use of a retardation foil leads to a greater brightness and more contrast, both in a "normally black" and a "normally white" display device. A preferred range for the retardation value of the foil is stated, together with a preferred range for the twist angle of the LCD.
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| 申请公布号 |
WO9858291(A1) |
申请公布日期 |
1998.12.23 |
| 申请号 |
WO1998IB00834 |
申请日期 |
1998.05.29 |
| 申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS AB |
发明人 |
CNOSSEN, GERARD;STALLINGA, SJOERD;MELNIK, GEORGE, A. |
| 分类号 |
G02F1/13;G02B27/02;G02B27/28;G02F1/1335;G02F1/13363;G02F1/139;H04N5/74;(IPC1-7):G02F1/133 |
主分类号 |
G02F1/13 |
| 代理机构 |
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代理人 |
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