Touch sensor and control circuit therefor

  • US 5,594,222 A
  • Filed: 10/25/1994
  • Issued: 01/14/1997
  • Est. Priority Date: 10/25/1994
  • Status: Expired due to Term
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First Claim
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1. A low impedance touch sensor apparatus for detecting manual contact by a human user and capable of activating a controlled device, said touch sensor apparatus comprising:

  • a dielectric substrate of substantially uniform thickness having first and second opposite surfaces;

    a first thin, conductive electrode pad disposed on said first surface of said substrate in a closed, continuous geometric form having an area which affords substantial coverage by a human appendage;

    a second thin, conductive electrode disposed on said first surface of said substrate in a spaced, coplanar and substantially surrounding relationship to said first electrode pad; and

    an active electrical component disposed on said substrate proximate said first and second electrodes and electrically coupled to said first and second electrodes, such that human contact of said substrate activates the controlled device.

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