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Apparatus, method, and medium for sensing movement of fingers using multi-touch sensor array

  • US 9,274,652 B2
  • Filed: 03/22/2007
  • Issued: 03/01/2016
  • Est. Priority Date: 05/17/2006
  • Status: Expired due to Fees
First Claim
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1. An apparatus for sensing movements of a plurality of fingers, the apparatus comprising:

  • a touch sensor which is configured to receive a plurality of touch inputs; and

    a controller which is configured to calculate finger position values indicating locations of the plurality of fingers that touches the touch sensor, and determine movement information of the plurality of fingers based on variations over time in the finger position values and if at least one touch input related to the movements is intentional, generate an input signal corresponding to the at least one touch input,wherein the controller calculates distances between a current finger position and a plurality of previous finger positions, compares the distances, and determines, based on the compared distances, which one of the plurality of previous finger positions is intentionally touched, andwherein the controller compares a j-th finger position value Pcj(t) of N finger position values detected at a current time t with the first through M-th finger position values Pc1(t-1) through PcM(t-1) detected at a previous time (t-1), and determines whichever of the first through M-th finger position values Pc1(t-1) through PcM(t-1) is least distant from the j-th finger position value Pcj(t) as displacement corresponding to movement of a j-th finger of a user.

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