Display device and method of driving the same

Details Display device and method of driving the same Display device and method of driving the same

1987-03-17

1989-03-28

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313422, H01J 2970, H01J 2972

Patent

active

048167240

ABSTRACT:
During a period in which electron beam emission to a photo-emissive screen is inhibited, a heating current is supplied to a cathode. During a period in which electron beam emission to the screen is enabled, the supply of the heating current to the cathode is interrupted and the potential at the cathode is varied with a video signal. During the beam emission enabling period, the interruption of the heating current supply allows the electron beam to be uniform along the cathode, since the heating current would cause a potential gradient or variation along the cathode. In addition, during the beam emission enabling period, since the cathode potential is varied with the video signal, the electron beam is modulated in accordance with the video signal.

REFERENCES:
patent: 3980822 (1976-09-01), Suzuki et al.
patent: 4167690 (1979-09-01), Gange
patent: 4451846 (1984-05-01), Iyehara et al.
patent: 4535272 (1985-08-01), Ueda et al.

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