Method for eliminating pi-cell artifacts
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United States of America Patent
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Mar 10, 2009
Grant Date -
Jan 10, 2002
app pub date -
Jan 19, 2001
filing date -
Jan 20, 2000
priority date (Note) -
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Abstract
An alternating unipolar carrier waveform is used to drive a pi-cell modulator. The pi-cell is driven by the carrier, but the carrier never changes polarity within the time period that the cell is energized. However, each time the cell is energized, i.e., once per field, the polarity alternates. Further, a burst of pulses each separated by a short rest period is used on initial application of power to more quickly drive the pi-cell to its activated state.
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