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Electronic display suitable for polar coordinate representations

  • US 4,626,840 A
  • Filed: 10/11/1983
  • Issued: 12/02/1986
  • Est. Priority Date: 10/14/1982
  • Status: Expired due to Fees
First Claim
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1. An electronic display including:

  • an electrically responsive medium disposed between first and second substrates, each substrate bearing electrodes adjacent to the electrically responsive medium, andmeans for energizing said electrodes to produce a response from the medium,wherein the first substrate bears concentric non-intersecting spiral first electrodes each extending from a central region of the display and covering 360°

    of arc, each first electrode being connected to a respective connecting means arranged to relay address signals thereto without overlapping other first electrodes, and the second substrate bears a pattern of second electrodes arranged to cooperate with the first electrodes such that designation of any pair of first and second electrodes addresses a respective region of the electrically responsive medium lying between that pair of first and second electrodes.

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