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Capacitive keyboard having variable make points

  • US 9,632,591 B1
  • Filed: 11/04/2014
  • Issued: 04/25/2017
  • Est. Priority Date: 09/26/2014
  • Status: Active Grant
First Claim
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1. An input device, comprising:

  • a key;

    a first button member associated with the key;

    a second button member associated with the key and disposed within the first button member;

    a dielectric material positioned between the first button member and the second button member; and

    a capacitive sensor configured to determine a change in a capacitance as a distance between the first button member and the second button member changes, wherein;

    the first button member and the second button member are disposed, at least in part, above a ground layer, anda first change in the capacitance is associated with a first make point of the key and a second change in the capacitance is associated with a second make point of the key.

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