Apparatus for accurate adjustment of kinescope black level bias

Details Apparatus for accurate adjustment of kinescope black level bias Apparatus for accurate adjustment of kinescope black level bias

1982-12-29

1985-05-21

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 10, 358139, H04N 962

Patent

active

045189862

ABSTRACT:
Apparatus for adjusting the black image current bias of a kinescope in a video signal display system includes means for developing a control signal representative of the black current bias condition of the kinescope. The control signal is developed in response to a sample of an integrated group of sensed bias representative signals developed over several horizontal line intervals which are significant in number relative to the number of horizontal line intervals associated with a vertical field interval. In the case of a color kinescope having plural electron guns, plural groups of signals respectively representative of the black current bias of each electron gun are developed. The plural signal groups exhibit a mutually time sequential relationship and are processed by a common signal processor to develop an integrated version of each of the bias representative signal groups.

REFERENCES:
patent: 4249197 (1981-02-01), van Spaandonk et al.
patent: 4277798 (1981-07-01), Hinn
patent: 4316212 (1982-02-01), Rodda
"Minolta TV Color Analyzer", Technical Bulletin, published by Minolta Corp., N.Y., N.Y.

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