Power on demand beam deflection system for dual mode CRT displays
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United States of America Patent
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-
Dec 8, 1987
Grant Date -
N/A
app pub date -
Jun 27, 1986
filing date -
Jun 27, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cathode ray beam deflection system operable in slew and random stroke and periodic raster display modes provides automatic power supply voltage switching to maintain linear operation and high efficiency. Control of automatic switching is obtained by continuously monitoring yoke voltage, yoke current, and deflection voltage, a power supply voltage being switched to a voltage of higher magnitude to provide a higher deflection rate when the yoke voltage exceeds a predetermined level at a predetermined current polarity and returned to a power supply voltage of lower magnitude when the higher deflection rate is no longer required.
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