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Drive control system for display devices

  • US 4,422,365 A
  • Filed: 12/16/1981
  • Issued: 12/27/1983
  • Est. Priority Date: 12/24/1980
  • Status: Expired due to Term
First Claim
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1. An electronic musical instrument having a plurality of operation keys and display devices provided for said respective operation keys, comprising:

  • matrix wiring means coupled to said operation keys and including intersecting row lines and column lines for wiring said plurality of operation keys in a matrix;

    wiring means coupled to said display devices for connecting display devices corresponding to said plurality of operation keys to said row lines and column lines of said matrix wiring means at the intersections of said row lines and column lines of said matrix;

    scanning signal generating means coupled to said matrix wiring means for supplying a scanning signal to said matrix wiring means for scanning said plurality of operation keys; and

    drive signal generating means coupled to said matrix wiring means for supplying a drive signal to said matrix wiring means for selectively turning one said display devices.

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