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Analog interferometric modulator

  • US 8,879,141 B2
  • Filed: 11/14/2013
  • Issued: 11/04/2014
  • Est. Priority Date: 06/15/2009
  • Status: Active Grant
First Claim
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1. A device for modulating light, comprising:

  • a first layer;

    a second layer, wherein a gap is present between the first and second layers, and the first layer and second layer are stationary relative to each other;

    a third layer disposed in the gap between the first and second layers;

    a switch for electrically isolating the third layer; and

    a control circuit configured to selectively induce an electric field between the first and second layers by applying a bias voltage across the first layer and the second layer;

    wherein the control circuit is configured to cause the third layer to move within the gap by varying the bias voltage, wherein movement of the third layer is based on an electrostatic force between the electric field and a charge applied to the third layer and a mechanical restorative force acting on the third layer.

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