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Free-space multi-dimensional absolute pointer with improved performance

  • US 9,176,598 B2
  • Filed: 05/05/2008
  • Issued: 11/03/2015
  • Est. Priority Date: 05/08/2007
  • Status: Expired due to Fees
First Claim
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1. A system comprising:

  • a handheld device having a pixelated sensor, an optical filter for passing a predetermined frequency band of radiation to the sensor, and a transmitter;

    electronic equipment having a display;

    at least two spaced-apart markers, each of which are positioned proximate to the display, the markers providing radiation at the frequency band passed by the optical filter, wherein the handheld device includes an imaging element that produces an image of the two of more spaced-apart markers on the pixelated sensor; and

    a processor coupled to receive image data of the image of the markers on the sensor and to compute coordinate data of the image on the sensor from the image data, the coordinate data requiring less data than the image data, the processor being coupled to the transmitter to transmit the coordinate data to the electronic equipment, wherein coordinates of a screen cursor are stabilized the coordinate data from the handheld device in conjunction with a following procedure performed for each X, Y display coordinate;

    determining whether a cursor speed is less than a predetermined threshold value, andwhile the cursor speed is less than the predetermined threshold value, obtaining a current coordinate by averaging previous M_coordinate values, wherein M is a pre-defined value, and wherein the coordinate values are derived from the coordinate data from the handheld device.

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