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Single crystal silicon arrayed devices with optical shield between transistor and substrate

  • US 6,317,175 B1
  • Filed: 06/06/1995
  • Issued: 11/13/2001
  • Est. Priority Date: 12/31/1990
  • Status: Expired due to Term
First Claim
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1. A projection display device comprising:

  • an optically transmissive substrate positioned to receive light from a light source;

    a light valve matrix secured to the substrate and comprising an array of transistors formed from a thin film of single crystal material, an array of electrodes, each electrode being electrically connected to a transistor, a gate positioned between a channel region of each transistor and the optically submissive substrate, a light transmitting material through which light from the light source is selectively transmitted, and an array of optical shields positioned between the gate of each transistor and the optically transmissive substrate to inhibit transmission of light from the light source to the transistors;

    a driver circuit electrically connected to the light valve matrix for actuating the light valves; and

    an optical system for projecting light transmitted through actuated light valves onto a viewing surface.

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