Method and device for multistate interferometric light modulation
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United States of America Patent
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Mar 27, 2012
Grant Date -
May 6, 2010
app pub date -
Jan 11, 2010
filing date -
Sep 27, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-state light modulator comprises a first reflector 104. A first electrode 142 is positioned at a distance from the first reflector 104. A second reflector 14 is positioned between the first reflector 104 and the first electrode 142. The second reflector 14 is movable between an undriven position, a first driven position, and a second driven position, each having a corresponding distance from the first reflector 104. In one embodiment, the light modulator has latch electrodes 17 and 143, which hold the light modulator in a driven state. In another embodiment the latch electrodes 17 and 143 are used to alter the actuation and release thresholds of the light modulator.
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