Automatic focusing apparatus and image pickup apparatus

Details Automatic focusing apparatus and image pickup apparatus Automatic focusing apparatus and image pickup apparatus

2011-04-26

2011-04-26

Tran, Sinh (Department: 2622)

Television

Camera, system and detail

Optics

C348S348000, C348S354000

Reexamination Certificate

active

07932950

ABSTRACT:
An automatic focusing apparatus performs focusing using a first automatic focusing method in which lens drive control is performed based on a focus signal so that a focus lens is moved to an in-focus point, and a second automatic focusing method in which lens drive control is performed based on information corresponding to an object distance so that the focus lens is moved to an in-focus point. The direction in which the focus lens is moved to the in-focus point according to the second automatic focusing method is compared with the direction in which the focus lens is moved to the in-focus point according to the first automatic focusing method. Based on the result, it is determined whether to perform the lens drive control according to the second automatic focusing method.

REFERENCES:
patent: 5597999 (1997-01-01), Kinba et al.
patent: 2003/0150973 (2003-08-01), Misawa
patent: 2004/0202461 (2004-10-01), Nakahara
patent: 2005/0083429 (2005-04-01), Yasuda
patent: 5-064056 (1993-03-01), None

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