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Pointing input system and method using one or more array sensors

  • US 7,956,842 B2
  • Filed: 06/10/2005
  • Issued: 06/07/2011
  • Est. Priority Date: 06/11/2004
  • Status: Expired due to Fees
First Claim
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1. A pointing input method for an input system, the input system including a display system, a screen, an array sensor fixedly positioned in the vicinity of the screen, an optical lens in the array sensor, and a pointer isolated from the array sensor, said pointing input method comprising the steps of:

  • using the array sensor to shoot a test pattern on the screen in order to obtain alignment data including image information of the test pattern;

    performing an alignment procedure for obtaining/using optical distortion information about the optical lens in the array sensor, spatial rotation, and displacement information from the alignment data;

    applying a light spot on the screen by the pointer;

    observing the screen with the array sensor to generate first data including image information of the light spot;

    generating second data including position information of the light spot from the first data based on the optical distortion information and spatial rotation and displacement information generated from the alignment procedure; and

    applying a correlated output on the screen based on the second data by the display system,wherein the step of generating second data comprises checking the first data to find a group of nearby pixels that constitute a first data spot based on at least one optical feature.

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