Driving apparatus for liquid crystal light modulator and variable optical attenuator employing driving apparatus
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United States of America Patent
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Apr 30, 2013
Grant Date -
Oct 21, 2010
app pub date -
Apr 16, 2010
filing date -
Apr 17, 2009
priority date (Note) -
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Abstract
A liquid crystal light modulator 11 modulates a light according to an effective value of a supplied drive signal. A driving apparatus 21 changes the effective value of each frame of the drive signal supplied to the liquid crystal light modulator 11 according to modulation data. The driving apparatus 21 generates the drive signal containing plural pulses in each frame. The driving apparatus 21 supplies the generated drive signal to the liquid crystal light modulator 11, thereby enabling a high-frequency drive of the liquid crystal light modulator 11.
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