Invention Grant
US09407810B2 Focus detection apparatus and control method thereof to control accumulation time of the focus detection sensors
有权
焦点检测装置及其控制方法，以控制焦点检测传感器的累积时间
- Patent Title: Focus detection apparatus and control method thereof to control accumulation time of the focus detection sensors
- Patent Title (中): 焦点检测装置及其控制方法，以控制焦点检测传感器的累积时间
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Application No.: US14162941Application Date: 2014-01-24
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Publication No.: US09407810B2Publication Date: 2016-08-02
- Inventor: Takayuki Shu
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2013-021797 20130206
- Main IPC: H04N5/232
- IPC: H04N5/232 ; G02B7/34 ; G03B13/36 ; G03B19/12
Abstract:
A focus detection apparatus comprises a sensor unit including a first sensor and a second sensor and configured to output a signal for focus detection, each of the first sensor and the second sensor being configured to receive light that has passed through an imaging optical system and accumulate electric charges, a first signal generation unit configured to generate a first signal based on a contrast of a signal corresponding to the electric charges accumulated in the first sensor, a second signal generation unit configured to generate a second signal based on a contrast of a signal corresponding to the electric charges accumulated in the second sensor; and a control unit configured to control an accumulation time of the electric charges in the first sensor and the second sensor.
Public/Granted literature
- US20140218596A1 FOCUS DETECTION APPARATUS AND CONTROL METHOD THEREOF Public/Granted day:2014-08-07
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