Automatic focusing circuit for automatically matching focus...

Details Automatic focusing circuit for automatically matching focus... Automatic focusing circuit for automatically matching focus...

H - Electricity

04

N

350/40

H04N 5/232 (2006.01)

Patent

CA 1328012

ABSTRACT OF THE DISCLOSURE An automatic focusing system for a video camera is disclosed in which an automatic focusing operation is performed by a focus evaluating value formed in response to a video signal obtained by an image sensing circuit. A first focusing motor control circuit controls the rotation of a focusing motor so that a focusing lens is once fixed in the position where the focus evaluating value takes the maximum value. A second focusing motor control circuit changes the focusing motor by a predetermined very small amount, to determine the slope of the focus evaluating value, which change is repeated until inversion of the slope, that is, the maximal point, is detected. As a result, the position of the focusing lens is corrected at the maximal point of the focus evaluating value. When the correction amount exceeds a predetermined value, the first automatic focusing operation by the first focusing motor control circuit is resumed. 47

552179

Affiliated with

Also associated with

Rating

Automatic focusing circuit for automatically matching focus... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic focusing circuit for automatically matching focus..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic focusing circuit for automatically matching focus... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1328073