发明名称 |
Light source device and projection type display apparatus |
摘要 |
A light source device or a projection type display apparatus has a pillar optical element; a condenser means; and a first lens effective to focus the image of the emitting end face of the pillar optical element at a surface to be irradiated; wherein the pillar optical element includes a tapered portion on a side of the incident end face and a non-tapered pillar portion on a side of the emitting end face, a cross-sectional area of the tapered portion continuously increasing from the incident end face toward the emitting end face and a cross-sectional area of the non-tapered pillar portion being constant.
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申请公布号 |
US6139156(A) |
申请公布日期 |
2000.10.31 |
申请号 |
US19980190176 |
申请日期 |
1998.11.12 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
OKAMORI, SHINJI;SHIKAMA, SHINSUKE |
分类号 |
G02B19/00;G02B27/00;G02B27/09;G02B27/18;G03B21/14;G03B21/20;H04N9/31;(IPC1-7):G03B21/14 |
主分类号 |
G02B19/00 |
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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