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Electro-optical measurement of hysteresis in interferometric modulators

  • US 7,894,076 B2
  • Filed: 02/14/2008
  • Issued: 02/22/2011
  • Est. Priority Date: 09/27/2004
  • Status: Expired due to Fees
First Claim
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1. A method of determining electrical parameters for driving a plurality of interferometric modulators, comprising:

  • applying a time-varying voltage stimulus to a plurality of interferometric modulators which are stable in an actuated state and a non-actuated state, wherein the time-varying voltage stimulus includes positive voltages higher than a positive actuation potential of the interferometric modulators and negative voltages lower than a negative actuation potential of the interferometric modulators;

    detecting reflectivity of light from the interferometric modulators; and

    determining one or more electrical parameters from said reflectivity of light in response to said time-varying voltage stimulus, the electrical parameters comprising an amplitude of an offset voltage in the interferometric modulators.

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