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Diffractive liquid crystal display

  • US 8,384,861 B2
  • Filed: 07/28/2009
  • Issued: 02/26/2013
  • Est. Priority Date: 07/28/2008
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal display (LCD) comprising:

  • a light source;

    a light diffractor over the light source configured to diffract light received from the light source;

    a liquid crystal diffraction grating over the light diffractor and between liquid crystal pixel structures comprising a plurality of liquid crystal pixels;

    wherein the liquid crystal diffraction grating is configured to have a changed diffractive property in response to application of a voltage differential across the diffraction grating, and configured when having the changed diffractive property to align diffracted light received from the light diffractor into aligned light directed toward the liquid crystal pixel structures;

    wherein the plurality of liquid crystal pixels each comprises a reflective part and a transmissive part;

    the reflective part of at least some of the plurality of liquid crystal pixels comprising a retroreflector configured to reflect at least some light rays, received from an external light source, toward the external light source.

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