发明名称 |
Projection display apparatus and projection lens device for use therein |
摘要 |
A projection display apparatus having a light source for generating a white light, a liquid crystal panel for modulating an incident light from the light source, a polarizing plate which is located at a light exiting side of the liquid crystal panel for polarizing a light from the liquid crystal panel passed therethrough and a cooling liquid for cooling at least the liquid crystal panel and the polarizing plate. A projection lens device having plural lens elements which is located at a light exiting side of the polarizing plate is provided for projecting the light passed through the polarizing plate. One of the plural lens elements located nearest the polarizing plate has a negative refractive power in a center region containing an optical axis thereof and has a positive refractive power in a peripheral portion of the center region.
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申请公布号 |
US2002034017(A1) |
申请公布日期 |
2002.03.21 |
申请号 |
US20010923371 |
申请日期 |
2001.08.08 |
申请人 |
HIRATA KOJI;MORI SHIGERU;OGURA NAOYUKI;OTSUKA YASUO |
发明人 |
HIRATA KOJI;MORI SHIGERU;OGURA NAOYUKI;OTSUKA YASUO |
分类号 |
G02B9/12;G02B13/16;G02B27/14;(IPC1-7):G02B3/00;G02B9/00 |
主分类号 |
G02B9/12 |
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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