Automatic white control circuit for color television receiver

Details Automatic white control circuit for color television receiver Automatic white control circuit for color television receiver

1984-07-09

1987-07-07

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, 358 74, H04N 964, H04N 920, H04N 916

Patent

active

046790659

ABSTRACT:
A color television receiver with automatic reference white control circuit has negative feedback loops for automatically adjusting the amplitude of each cathode driving voltage of R, G and B electron guns, so that the magnitude of each cathode current of R, G and B electron guns is converged to a given value. According to the negative feedback operation, an adjusted reference white becomes insensitive to changes in the cathode emission of CRT due to aging.

REFERENCES:
patent: 4012775 (1977-03-01), Smith
patent: 4200882 (1980-04-01), Janssen
patent: 4340904 (1982-07-01), Wingrove, Jr.
patent: 4356508 (1982-10-01), Okada
patent: 4370674 (1983-01-01), Johnson et al.
patent: 4516152 (1985-05-01), Willis

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