×

Touch sensitive control panel utilizing pyroelectric material

  • US 4,307,383 A
  • Filed: 03/08/1980
  • Issued: 12/22/1981
  • Est. Priority Date: 02/08/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A control panel for an appliance having a multiplicity of operating capabilities, functions and conditions, said control panel comprising:

  • a backing member;

    a layer of conductive material on a surface of said backing member;

    a plurality of pads of pyroelectric material at selected locations on said conductive layer;

    a layer of insulative material on said conductive layer, said insulative layer leaving said pyroelectric pads exposed;

    a plurality of non-intersecting elongated conductors on said insulative layer; and

    a graphics display member overlying said conductors, said graphics display member having indicia thereon representative of said operating capabilities, functions and conditions of said appliance;

    said pads of pyroelectric material being placed on said conductive layer in registration with said indicia and selectively in contact with said conductors so that a binary coded combination of voltage pulses is applied to said conductors in response to a body portion of an operator touching one of said indicia, each of said indicia corresponding to a unique respective binary code.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×