发明名称 |
Projection type image display apparatus |
摘要 |
According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light. The apparatus uses two array lenses on which lens cells are arranged in matrix form, where light-masking unit masks the array lens installed on the light source side in their particular area. The light-masking unit adjusts the amount of light emitted from the light source. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.
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申请公布号 |
US8142025(B2) |
申请公布日期 |
2012.03.27 |
申请号 |
US201113209153 |
申请日期 |
2011.08.12 |
申请人 |
SHIMIZU TAKUYA;KATO KENTARO;HITACHI LTD. |
发明人 |
SHIMIZU TAKUYA;KATO KENTARO |
分类号 |
G03B21/14 |
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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