Memory-type automatic adjustment system

Details Memory-type automatic adjustment system Memory-type automatic adjustment system

1978-02-27

1981-06-16

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358171, 328168, 307222R, 455182, H04N 9535, H03K 2136

Patent

active

042741076

ABSTRACT:
A memory-type control system for producing and storing a control signal which is used in an automatic adjustment system. A signal, having a parameter to be controlled, is provided; and a detecting circuit detects when the parameter is within a predetermined range. An UP/DOWN counter counts clock pulses and is responsive to the detecting circuit for counting in one direction when the detected parameter is greater than the predetermined range, for counting in a second direction when the detected parameter is less than the predetermined range and for ceasing its counting when the detected parameter is within the predetermined range. A parameter control circuit uses the count of the counting means as a control signal to adjust the parameter so as to bring said parameter within the predetermined range. A typical application of the automatic adjustment system is a white-balance control system for use with video camera apparatus.

REFERENCES:
patent: Re28774 (1976-04-01), Kubota et al.
patent: 3378786 (1968-04-01), Andrea
patent: 3636462 (1972-01-01), Baldauf, Jr.
patent: 3670100 (1972-06-01), Briggs et al.
patent: 3838310 (1974-09-01), Varian
patent: 3882412 (1975-05-01), Apple
patent: 3903472 (1975-09-01), Wahl
patent: 3949158 (1976-04-01), Rzeszewski
patent: 3953801 (1976-04-01), Podowski
patent: 3970777 (1976-07-01), Bradford et al.
patent: 4037254 (1977-07-01), Monahan
Kida et al., "Development of High Sensitivity Color TV Camera", NEC Research and Development Bulletin, No. 40, Jan. 1976, pp. 86-95.

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