发明名称 |
Projection apparatus and projection-type image display apparatus |
摘要 |
In an illumination optical system and a color combining optical system of a projection apparatus using three image display elements, the object of the present invention is to reduce misconvergence of enlarged images displayed on a screen. The present invention provides a projection apparatus including light-detecting elements provided outside of an effective screen display area. An active region of image display elements for each color beam is controlled respectively based on results of the light-detecting elements in order to adjust display position of each color beam on the screen.
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申请公布号 |
US6905213(B2) |
申请公布日期 |
2005.06.14 |
申请号 |
US20040887028 |
申请日期 |
2004.07.07 |
申请人 |
HITACHI, LTD. |
发明人 |
HIRATA KOJI;YATSU MASAHIKO;YAMASAKI FUTOSHI |
分类号 |
G03B33/12;G02B27/14;G02B27/28;G03B21/00;H04N9/31;(IPC1-7):G03B21/00;G03B21/14;G03B21/20;G03B21/22;H04N3/22 |
主分类号 |
G03B33/12 |
代理机构 |
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