发明名称 |
Focus detection apparatus, method of driving the same and camera system |
摘要 |
A low cost and high speed AF sensor is realized by increasing AF speed without providing a sensor dedicated for a large de-focusing AF. The AF sensor has two sensors each including a plurality of photoelectric conversion elements and detects a focus based on signals read from the sensors. The two sensors each includes a plurality of linear sensors 11 to 13. The two sensors each has a plurality of accumulation controlling circuits (PB detection circuits 14 to 16 and accumulation decision circuits 17 to 19) for controlling the accumulation time of the photoelectric conversion elements and a plurality of scanning circuits (shift registers 21 to 23) for reading out output signals from the photoelectric conversion elements. The AF sensor has a first mode in which the accumulation time of each linear sensor in the two sensors is independently controlled to independently read a signal output and a second mode in which the accumulation time of the linear sensors in the two sensors is collectively controlled to read a signal output.
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申请公布号 |
US7643743(B2) |
申请公布日期 |
2010.01.05 |
申请号 |
US20070751974 |
申请日期 |
2007.05.22 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
INOUE DAISUKE;TAKAHASHI HIDEKAZU |
分类号 |
G03B3/00 |
主分类号 |
G03B3/00 |
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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