发明名称 |
Projection display device |
摘要 |
The invention relates to a projection display device comprising an illumination system having a light source and an optical guiding means for providing an illumination beam, and an image display system for modulating the illumination beam with image information and projecting the image on a screen, and means for selectively transmitting a portion of the illumination beam having a desired characteristic to the image display system, and means for feeding back an unused portion of the illumination beam to the illumination system for re-illumination of the image display system. In order to improve the efficiency of the projection display device, a reflection means is provided at a portion of an entrance surface of the light-guiding means and the unused portion of the illumination beam is fed back into the light-guiding means.
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申请公布号 |
US2002180937(A1) |
申请公布日期 |
2002.12.05 |
申请号 |
US20020153258 |
申请日期 |
2002.05.22 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
DE VAAN ADRIANUS JOHANNES STEPHANES MARIA;MCCLAIN STEPHEN CHARLES;MOENCH HOLGER |
分类号 |
G03B21/14;H04N5/74;H04N9/31;(IPC1-7):G03B21/00 |
主分类号 |
G03B21/14 |
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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