发明名称 |
Projector with adjustably positioned image plate |
摘要 |
A project is often positioned so that its optical axis is at an imperfect orthogonal angle with respect to a projection screen. This position causes a keystone distortion as well as imperfect focus in the projected image. To correct these undesirable problems, initially, a lens and/or an image-forming plate is independently repositioned to bring the projected image into focus based upon user input data. The keystone distortion is also corrected by redrawing the image on an image-forming surface based upon additional user input data.
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申请公布号 |
US7182464(B2) |
申请公布日期 |
2007.02.27 |
申请号 |
US20040981804 |
申请日期 |
2004.11.05 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
EJIRI KOICHI;YAMAGUCHI TAKAO;AOKI SHIN;GUAN HAIKE |
分类号 |
G03B21/00;H04N5/74;G02B27/18;G03B21/14;G03B21/28;H04N17/00;H04N17/04 |
主分类号 |
G03B21/00 |
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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