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Color performance of IMODs

  • US 9,024,925 B2
  • Filed: 03/13/2013
  • Issued: 05/05/2015
  • Est. Priority Date: 03/13/2013
  • Status: Expired due to Fees
First Claim
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1. An interferometric modulator (IMOD), comprising:

  • a substrate;

    an absorber stack disposed on the substrate;

    a movable reflector stack including a metal mirror and a dielectric stack, the dielectric stack being disposed between the absorber stack and the metal mirror, the dielectric stack being configured to reduce a standing wave node separation for light reflecting from the movable reflector stack, as compared to light reflecting from the movable reflector stack in the absence of the dielectric stack, such that the IMOD is configured for reflecting a white color when the reflector stack is in close proximity to the absorber stack, the movable reflector stack being further configured to be moved between a plurality of positions relative to the absorber stack, each of the positions corresponding with an IMOD color state including a white state for reflecting the white color, a black state, and one or more other colored states; and

    a first protrusion connected to the movable reflector stack or to the absorber stack,wherein the first protrusion has a first height and is configured to cause the movable reflector stack to be tilted relative to the absorber stack when the movable reflector stack is moved close to the absorber stack.

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