Power as required beam deflection system for CRT displays with r

Details Power as required beam deflection system for CRT displays with r Power as required beam deflection system for CRT displays with r

1986-05-01

1987-07-07

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

315403, H01J 2970, H01J 2976

Patent

active

046789707

ABSTRACT:
An electron beam magnetic deflection system capable of raster and stroke deflection and providing minimum power dissipation in raster mode. Automatic switching of the voltage demanded in raster mode is obtained by continuously sampling the yoke current, the power supply voltage being switched in magnitude and polarity corresponding to the direction of change and polarity of the yoke current. By returning energy stored in the yoke to the power supply during portions of the raster cycle, power efficiency is substantially enhanced.

REFERENCES:
patent: 4164688 (1979-08-01), Cushing
patent: 4262235 (1981-04-01), Neves et al.

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