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Matrix array display devices with light sensing elements and associated storage capacitors

  • US 6,738,031 B2
  • Filed: 05/22/2001
  • Issued: 05/18/2004
  • Est. Priority Date: 06/20/2000
  • Status: Expired due to Fees
First Claim
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1. A matrix display device comprising on a substrate an array of addressable pixels each having a display element and a display element control circuit for controlling the operation of the display element, wherein the display element control circuit includes a charge storage capacitor and an associated thin film photosensitive semiconductor material having doped contact regions laterally spaced on the substrate and an intervening region, and wherein the storage capacitor comprises a conductive layer extending substantially traversely of the semiconductor strip over one contact region thereof with a layer of dielectric material being disposed between the conductive layer and that contact region;

  • wherein a structure of each one pixel of said array of addressable pixels is modified relative to said storage capacitor to be relatively smaller than said storage capacitor so that a portion of said storage capacitor additionally comprises a light shielding means for shielding ambient light to said each one pixel.

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