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Light emitting diode switch device and array

  • US 9,471,181 B2
  • Filed: 09/10/2014
  • Issued: 10/18/2016
  • Est. Priority Date: 01/21/2011
  • Status: Active Grant
First Claim
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1. A touch input circuit, comprising:

  • a light emitting diode switch device including;

    at least one electroluminescent semiconductor element with a first polarity contact and a second polarity contact;

    a first polarity lead electrically connected to the first polarity contact;

    a second polarity lead electrically connected to the second polarity contact;

    a first touch sensor structure of a unitary construction defined by a first touch sensor lead section, a first touch sensor contact section, and a first touch sensor lead frame section;

    a case encapsulating the electroluminescent semiconductor element, the first touch sensor contact section, and the first touch sensor lead frame section;

    wherein an entire structural contiguity of the first touch sensor lead frame section and the first touch sensor contact section are unexposed on an outer surface of the case, the first touch sensor contact section extending into the case with galvanic isolation of the first touch sensor lead frame section and the first touch sensor contact section being maintained relative to an exterior of the case while dielectric conduction from the exterior of the case to the first touch sensor lead frame section and the first touch sensor contact section is allowed;

    at least one touch input transmission line electrically connected to the first touch sensor lead section of the light emitting diode switch device;

    a touch input controller with an input that is singularly receptive to a capacitive touch input upon the light emitting diode switch device, a capacitive change to the first touch sensor contact section being conducted through an entire structural contiguity of the first touch sensor structure to the input of the touch input controller over the touch input transmission line.

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