Circuit for automatically focusing a camera based on changes in

Television – Camera – system and detail – Optics

Patent

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Details

348355, H04N 5232

Patent

active

055260497

ABSTRACT:
An automatic focus circuit for use with a video camera comprises an analog to digital converter which converts an analog luminance signal provided from an image signal processing circuit into a digital luminance signal, a microcomputer for controlling the automatic focus unit using an integrated luminance value which is integrated in an integrating circuit, and an area dividing circuit for horizontally and vertically dividing a screen of a video camera monitor. The automatic focus operation is easily performed by using the integrated digital luminance value as stored in a memory circuit. Accordingly, the automatic focus circuit simplifies the constitution and accuracy of the automatic focus.

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patent: 5212516 (1993-05-01), Yamada et al.

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