Focus control device and focus control method

Details Focus control device and focus control method Focus control device and focus control method

2006-01-25

2008-12-09

Ho, Tuan (Department: 2622)

Television

Camera, system and detail

Optics

C348S347000, C348S349000, C348S353000, C348S365000, C396S089000

Reexamination Certificate

active

07463302

ABSTRACT:
A focus control device includes a lens unit including a focus lens; a focus lens driving mechanism that moves the focus lens to achieve an in-focus state; a focus status detector that detects a focus status acquired by the focus lens; a drive control unit that controls the focus lens driving mechanism so that the detected focus status is the in-focus state; a change detector that detects that an evaluation value for focus control has changed by a threshold value or more; and an execution control unit that waits in a state in which the drive control unit does not control the focus lens driving mechanism for a waiting time starting from a time when the change detector detects that the evaluation value has changed by the predetermined threshold value or more, and that causes the drive control unit to control the focus lens driving mechanism when the state in which the evaluation value has changed by the predetermined threshold value or more is maintained until the waiting time has elapsed.

REFERENCES:
patent: 4992817 (1991-02-01), Aoyama et al.
patent: 5223886 (1993-06-01), Ishida et al.
patent: 6512549 (2003-01-01), Iijima et al.
patent: 6879343 (2005-04-01), Yamazaki et al.
patent: 2966458 (1991-09-01), None

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