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Keypads and key switches

  • US 20040031673A1
  • Filed: 05/23/2003
  • Published: 02/19/2004
  • Est. Priority Date: 05/23/2002
  • Status: Active Grant
First Claim
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1. A keypad comprising a matrix of key regions including an array of elevated key regions each providing a corresponding character output when actuated;

  • and key regions interspersed between the elevated key regions and providing character output based at least in part on an operation algorithm that includes activation of at least one adjacent elevated key region;

    wherein the keypad includes corresponding, independently actuatable key switches disposed below the interspersed key regions, the operation algorithm also including actuation of the associated switches below the interspersed key regions.

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