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Flat-panel display using tapered waveguide

  • US 20040196665A1
  • Filed: 02/02/2004
  • Published: 10/07/2004
  • Est. Priority Date: 08/02/2001
  • Status: Active Grant
First Claim
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1. A tapered-waveguide optical apparatus including an input waveguide in the form of a slab, into one end of which light can be injected so that it bounces along the waveguide and exits at the other end, and an output waveguide adapted to receive light from the input waveguide at an input end of the output waveguide to allow it to propagate a certain distance by reflection within the waveguide and then to emit the light over one of the faces of the output waveguide when the angle of incidence at that face exceeds the critical angle;

  • in which the output waveguide'"'"'s thickness profile is such that light bounces the same number of times in total, passing through the two waveguides, before leaving the output waveguide.

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