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Optical positioning device using different combinations of interlaced photosensitive elements

  • US 20050259097A1
  • Filed: 05/05/2005
  • Published: 11/24/2005
  • Est. Priority Date: 05/21/2004
  • Status: Abandoned Application
First Claim
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1. An optical displacement sensor for sensing relative movement between a data input device and a surface by determining displacement of optical features in a succession of frames of the surface, the sensor comprising:

  • a detector including a plurality of photosensitive elements organized in first and second arrays;

    first circuitry configured to combine signals from every Mth element of the first array to generate M group signals; and

    second circuitry configured to combine signals from every M′

    th element of the second array to generate M′

    group signals, wherein M and M′

    are numbers which are different from each other.

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