发明名称 |
PROJECTION DEVICE HAVING AN INCREASED EFFICIENCY |
摘要 |
<p>The invention relates to a projection device for projecting an image, comprising a light source ( 1 ), a LCD projection subsystem ( 3 ) and a projection means ( 4, 5 ) for projecting the image. A small-sized and low-cost projection device is porposed wherein said projection subsystem comprises: a waveguide integrator ( 30 ) for guiding light from an entrance ( 31 ) to an exit ( 34 ), the inner entrance surface ( 33 ) of said integrator ( 30 ) being coated with a reflective material and having a hole ( 32 ) for coupling light emitted from said light source ( 1 ) into said integrator ( 30 ), a reflective polarizer ( 35 ) provided at the exit surface ( 34 ) of said integrator ( 30 ) for reflecting light having the wrong polarization backinto said integrator ( 30 ), a transmissive LCD ( 36 ) provided at the exit of said reflective polarizer ( 35 ) for modulating the light transmitted by said polarizer ( 35 ), said LCD ( 36 ) having an integrated reflective color filter array ( 37 ) for reflecting light having the wrong color back into said integrator ( 30 ).</p> |
申请公布号 |
EP1483617(A1) |
申请公布日期 |
2004.12.08 |
申请号 |
EP20030702858 |
申请日期 |
2003.02.12 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
HIKSPOORS, HENRICUS, M., J.;SMITS, WILLEM, H.;DE VAAN, ADRIANUS, J., S., M. |
分类号 |
G02B5/30;G02F1/00;G02F1/13;G02F1/1335;G02F1/13357;G03B21/00;H04N9/31;(IPC1-7):G02F1/00 |
主分类号 |
G02B5/30 |
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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