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Identifying actual touch points using spatial dimension information obtained from light transceivers

  • US 9,317,159 B2
  • Filed: 09/26/2008
  • Issued: 04/19/2016
  • Est. Priority Date: 09/26/2008
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a touch-screen having multiple light transceivers configured to emit and detect light; and

    processing logic coupled to the light transceivers, the processing logic configured to;

    obtain spatial information of multiple possible touch points on said touch-screen using said detected light;

    use the spatial information to compare a size of one pair of said multiple possible touch points to an average size of said multiple possible touch points;

    use the spatial information to predict which of the multiple possible touch points comprise actual touch points and which of the multiple possible touch points comprise phantom touch points;

    select as actual touch points a pair of said multiple possible touch points if a size of said pair is closer to the average size of said multiple possible touch points than any other pair;

    after the processing logic detects a single, actual touch point, delay for a predetermined length of time prior to confirming the actual touch point as a touch event to allow for additional touches on the touch-screen; and

    abort said delay as a result of the actual touch point being moved outside of a predetermined distance from an original location of the actual touch point.

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