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DITHERING METHODS AND APPARATUS FOR WEARABLE DISPLAY DEVICE

  • US 20180059304A1
  • Filed: 08/22/2017
  • Published: 03/01/2018
  • Est. Priority Date: 08/22/2016
  • Status: Active Grant
First Claim
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1. A device comprising:

  • an input coupling grating having a first grating structure characterized by a first set of grating parameters, wherein the input coupling grating is configured to receive light from a light source;

    an expansion grating having a second grating structure characterized by a second set of grating parameters varying in at least two dimensions, wherein the second grating structure is configured to receive light from the input coupling grating; and

    an output coupling grating having a third grating structure characterized by a third set of grating parameters, wherein the output coupling grating is configured to receive light from the expansion grating and to output light to a viewer.

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