Television – Camera – system and detail – Optics
Patent
1996-02-14
1997-03-25
Peng, John K.
Television
Camera, system and detail
Optics
348355, H04N 5232
Patent
active
056149514
ABSTRACT:
An apparatus and a method for automatically focusing an object in a video cameras comprises a solid state image sensor for converting a light beam transmitted through a lens and an iris into an electrical signal, an amplifier for amplifying a video signal from the solid state image sensor, a video signal processor for processing the video signal amplified by the amplifier, high pass filters for high pass filtering the video signal amplified by the amplifier, a video divider for dividing the video signals filtered by the high pass filters in the unit of field, a low pass filter for low pass filtering the video signals divided by the video divider, an A/D converter for converting the video signals filtered by the low pass filter into digital signals, an integrator for integrating the digital signals from the A/D converter to output video detect data, and a microprocessor for checking a level of the video detect data from the integrator and outputting a control signal to a lens motor driver in accordance with the checked result to move the lens to a position at which the level of the video detect data becomes a peak value. An object motion diagnostic circuit senses a motion of the object to be focused and outputting a high signal to the microprocessor according to the sensed result to stop a motion of the lens during the motion of the object.
REFERENCES:
patent: 4484806 (1984-11-01), Onishi
patent: 4531158 (1985-07-01), Murakami
patent: 4544953 (1985-10-01), Goldman
patent: 4672456 (1987-06-01), Murai
patent: 4782396 (1988-11-01), Park
patent: 4853788 (1989-08-01), Murashima
patent: 4922346 (1990-05-01), Hidaka
patent: 4967280 (1990-10-01), Takuma
patent: 5003339 (1991-03-01), Kikuchi
Jang Jee Y.
Lee Seoung E.
Goldstar Co. Ltd.
Ho Tuan V.
Peng John K.
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