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ANALOG DISPLAY USING LIGHT EMITTING DIODES

  • US 3,696,393 A
  • Filed: 05/10/1971
  • Issued: 10/03/1972
  • Est. Priority Date: 05/10/1971
  • Status: Expired due to Term
First Claim
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1. An analog planar device for displaying a unipolar electrical signal, said device comprising elemental unidirectional conducting light cell units mounted in rows and columns;

  • an orthogonal set of conductors connected across each of said unidirectionally conducting light cell units at the respective junctions thereof, the light cell units in any row being poled in a common direction and the next succeeding row to be scanned being poled in an opposite direction;

    means responsive to said unipolar electrical signal for reversing the polarity thereof commencing with each horizontal scan thereby to provide a bipolar electrical signal;

    means for taking successive samples of said bipolar electrical signal during each horizontal scan; and

    means for generating currents in proportion to said successive samples and for directing said currents to corresponding light cell units in the row being scanned and the prior row scanned whereby a composite row of light cell units remain energized during presentation of the display.

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