Discrete automatic focusing and error correcting method

Details Discrete automatic focusing and error correcting method Discrete automatic focusing and error correcting method

2011-06-14

2011-06-14

Perkey, W. B. (Department: 2862)

Photography

Having variable focal length of camera objective

Automatic change of focal length

C348S345000, C250S201700

Reexamination Certificate

active

07962026

ABSTRACT:
Provided are a discrete AF control method and an error correcting method of a camera module using a diffraction device. In the method, a focus is moved to a (the number of all positions/m)-th position, and a focusing value at a start position is compared with that at the (the number of all positions/m)-th position. A focus is moved by two positions in a first direction according to the comparison result. If a position having a maximum focusing value is passed, a focus is moved by one position in a direction opposite to the first direction and a location (corresponding to an n-th position) is stored. Focusing values of the n-th position, an (n−1)-th position, and an (n−2)-th position are compared with one another to determine a maximum focus location, m being an integer equal to or greater than 2.

REFERENCES:
patent: 4473743 (1984-09-01), Ishikawa
patent: 5249058 (1993-09-01), Murata et al.
patent: 6430368 (2002-08-01), Hata
patent: 2001/0035910 (2001-11-01), Yukawa et al.
patent: 2003/0048372 (2003-03-01), Yasuda
patent: 2003/0063211 (2003-04-01), Wantnabe et al.
patent: 2003/0063212 (2003-04-01), Watanabe et al.
patent: 2003/0117517 (2003-06-01), Ogino
patent: 2008/0124068 (2008-05-01), Kwon et al.
patent: 0 341 692 (1989-11-01), None
patent: 1 821 128 (2007-08-01), None
patent: WO-2006/054562 (2006-05-01), None

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