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Prismatic multiple waveguide for near-eye display

  • US 8,649,099 B2
  • Filed: 09/13/2011
  • Issued: 02/11/2014
  • Est. Priority Date: 09/13/2010
  • Status: Active Grant
First Claim
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1. A near-eye display for displaying virtual images comprisingan image generator for generating angular transforms of the virtual images intended for display as angularly related beamlets representing different spatially related points in the images,a plurality of different waveguides that convey the angularly related beamlets toward an eyebox,an input coupling for injecting the angularly related beamlets into the waveguides for propagation along the waveguides,an output coupling for ejecting the angularly related beamlets from the waveguides toward the eyebox,each of the plurality of different waveguides having a front surface and a back surface, a thickness between the front and back surfaces, and a length that extends between the input coupling and the output coupling,the input coupling being optically spaced from the image generator for injecting different angular ranges of the angularly related beamlets into the different waveguides so that each of the different waveguides conveys a different region of the intended virtual images,each of the different waveguides being spatially offset from one another in a direction normal to the front and back surfaces of the different waveguides for separately propagating a different one of the different angular ranges of the angularly related beamlets along the length of each of the different waveguides between the input and output couplings, andthe output coupling being oriented for ejecting the different angular ranges of the beamlets from the different waveguides on converging paths toward the eyebox into positions of increasing spatial overlap.

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