Compensation for drift in a cathode ray tube

Details Compensation for drift in a cathode ray tube Compensation for drift in a cathode ray tube

1990-04-26

1991-12-31

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315381, H01J 2952

Patent

active

050775022

ABSTRACT:
A circuit which compensates for the effects of drift that occur during the operation of a cathode ray tube because of temperature changes or aging and which produces changes in intensity of the picture on the cathode ray tube by sensing the intensity changes and varying the bias on the second grid of the cathode ray tube to restore the desired intensity.

REFERENCES:
patent: 4070691 (1978-01-01), Smith et al.
patent: 4075485 (1978-02-01), Lijewaki et al.
patent: 4187451 (1980-02-01), Boekhorst
patent: 4300074 (1981-10-01), Diddens et al.
patent: 4442458 (1984-04-01), Barter
patent: 4449501 (1985-02-01), Eriksen et al.
patent: 4461983 (1984-07-01), Lees
patent: 4701679 (1987-10-01), Satou et al.
patent: 4724364 (1988-02-01), Newton
patent: 4742397 (1988-05-01), Ferla et al.

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