发明名称 |
Projector with tilt-angle detecting capability |
摘要 |
A projector includes two range sensors of a phase difference method. The range sensors are laid out near a projection lens in such a way that a line connecting the centers of two photo-sensor arrays incorporated in one of the range sensors crosses a line connecting the centers of two photo-sensor arrays incorporated in the other range sensors approximately at the right angles. A control section controls those range sensors to measure distances to a plurality of ranging points on a screen. The control section computes the tilt angle of the screen based on the measured distances and supplies the computed tilt angle to a trapezoid correcting section and an optical mechanism section.
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申请公布号 |
US2004252283(A1) |
申请公布日期 |
2004.12.16 |
申请号 |
US20040866299 |
申请日期 |
2004.06.10 |
申请人 |
CASIO COMPUTER CO., LTD. |
发明人 |
OGAWA MASAHIRO |
分类号 |
G01B11/26;G01C3/06;G03B21/00;G03B21/14;H04N5/74;H04N17/00;(IPC1-7):G03B21/00 |
主分类号 |
G01B11/26 |
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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