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DRAWINGBOARD II, A GRAPHICAL INPUT-OUTPUT DEVICE FOR A COMPUTER

  • US 3,673,579 A
  • Filed: 08/26/1970
  • Issued: 06/27/1972
  • Est. Priority Date: 08/26/1970
  • Status: Expired due to Term
First Claim
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1. A graphical input-output device for a computer comprising a plurality of light emitter-sensor circuits juxtaposed in a common plane and arranged in ordered array, means for electrically activating and deactivating said light emitters, means for emitting radiant energy for activating said light sensors, means for connecting said emitter-sensor circuits to a computer, and means for controlling the flow of information represented by the activated and inactivated status of said emitters from and to said computer.

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