Invention Grant
- Patent Title: Image-pickup apparatus
- Patent Title (中): 摄像装置
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Application No.: US11833836Application Date: 2007-08-03
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Publication No.: US08237849B2Publication Date: 2012-08-07
- Inventor: Shuya Tanaka
- Applicant: Shuya Tanaka
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon USA Inc IP Division
- Priority: JP2006-219818 20060811
- Main IPC: H04N5/232
- IPC: H04N5/232 ; G03B13/00

Abstract:
An image-pickup apparatus is disclosed which is capable of realizing a focus-effect function in a constant time without being influenced by contrast of an object or the position of a focus lens. The apparatus includes a signal generator which generates a focus evaluation signal, a detector which detects information corresponding to an object distance, and a controller which performs focus lens control on the basis of the focus evaluation signal and focus lens control on the basis of information corresponding to the object distance. The controller determines a direction and a velocity in which the focus lens is moved toward an in-focus position on the basis of the information corresponding to the object distance in the focus lens control according to the focus-effect function. The controller performs the focus lens control on the basis of the focus evaluation signal after the focus lens is moved in the determined direction.
Public/Granted literature
- US20080036902A1 IMAGE-PICKUP APPARATUS Public/Granted day:2008-02-14
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