Method and circuit for improving a quality of display on an LCD screen
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United States of America Patent
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-
Jan 8, 2008
Grant Date -
Dec 23, 2004
app pub date -
Jun 17, 2003
filing date -
Jun 17, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and circuit for improving a quality of display on an LAD screen are disclosed. The method is to synchronize a vertical synchronization signal of a video signal supplied to an LAD system with an oscillation signal produced by a burst mode DC-to-AC inverter driving the lamps of the system in order to suppress interference noise appearing on an LCD screen. The circuit suggested includes mainly two semiconductor switches, impedance elements, and a diode to realize the synchronization function.
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