Automatic focusing methods and image capture devices...

Details Automatic focusing methods and image capture devices... Automatic focusing methods and image capture devices...

2006-12-12

2009-12-08

Perkey, W. B. (Department: 2862)

Photography

With exposure objective focusing means, focusing aid, or...

Processing circuit

C396S118000, C348S353000

Reexamination Certificate

active

07630622

ABSTRACT:
An autofocusing method is implemented in an image capture device comprising a lens and a sensor module. The relative positions of lens and the sensor module are adjusted for autofocusing based on a factor. First, the relative positions of the lens and the sensor module are adjusted based on a first unit of the factor to determine a plurality of states of the lens and the sensor module, where the lens renders clearer images on the sensor module. The states are utilized to estimate a best state achievable by focusing based on a second unit of the factor, where the lens renders a clearest image on the sensor module. The second unit is finer than the first unit. The lens or the sensor module is driven to the best state.

REFERENCES:
patent: 4967280 (1990-10-01), Takuma et al.
patent: 5969760 (1999-10-01), Ernest et al.
patent: 6614480 (2003-09-01), Oda et al.
patent: 2004/0227843 (2004-11-01), Watanabe
patent: 2006/0078323 (2006-04-01), Nakahara

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