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LED array with photodetector

  • US 8,264,431 B2
  • Filed: 10/23/2003
  • Issued: 09/11/2012
  • Est. Priority Date: 10/23/2003
  • Status: Active Grant
First Claim
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1. An array, comprising:

  • a plurality of light emitting devices disposed on a transparent substrate, the transparent substrate having an upper surface that contacts each light emitting device, a lower surface distal from the plurality of light emitting devices and a plurality of side surfaces, each of the side surfaces being substantially perpendicular to the upper surface,wherein each of the plurality of light emitting devices is individually addressed to display an image; and

    at least one photodetector non-removably flush mounted, with a detector side facing the plurality of light emitting devices, on an external face of the lower surface of the transparent substrate for detecting a fraction of waveguided light emitted from the plurality of light emitting devices, wherein another fraction of waveguided light is edge emitted, wherein the fraction of waveguided light and the another fraction of waveguided light is directly observable.

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