发明名称 |
Illumination device and projector |
摘要 |
An illumination device includes: a light source; a polarization converter (114) that converts a light beam irradiated by the light source into a substantially uniform linear polarized light, the polarization converter (114) being slanted relative to a central axis of the light beam irradiated by the light source and including a plurality of polarization-separating films (1141) and a plurality of light reflection films (1143) alternately arranged in a direction substantially orthogonal to the central axis of the light beam irradiated by the light source; an optical filter (311) provided between the light source and the polarization converter (114) and having a plurality of optical conversion layers, which are formed striped with the pitch thereof corresponding to the arrangement of the polarization-separating films (1141) to optically convert the incident light beam; a holder frame (312) that holds the optical filter (311); and a filter-driving mechanism (313) that moves the holder frame (312) in a direction in which the polarization-separating films (1141) are arranged.
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申请公布号 |
US2005030749(A1) |
申请公布日期 |
2005.02.10 |
申请号 |
US20040853159 |
申请日期 |
2004.05.26 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
NISHIDA KAZUHIRO;MOMOSE AKIRA |
分类号 |
G02B5/00;G02B27/28;H04N9/31;(IPC1-7):F21S2/00 |
主分类号 |
G02B5/00 |
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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