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Optical navigation device and locus smoothing method thereof

  • US 10,082,883 B2
  • Filed: 07/22/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 05/01/2012
  • Status: Active Grant
First Claim
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1. An optical navigation device, comprising:

  • an image sensor configured to successively capture images;

    an output unit;

    a processing unit coupled to the output unit and configured tocalculate a current displacement according to the images and to compare the current displacement with a threshold;

    when the current displacement is smaller than the threshold, output a zero displacement to an external electronic device via the output unit and accumulate the current displacement to an accumulated displacement; and

    when the current displacement is larger than or equal to the threshold, output the current displacement without accumulating the current displacement to the accumulated displacement; and

    a counting unit configured to count an accumulated number which is a number of times the current displacement is accumulated to the accumulated displacement,wherein the accumulated number is increased by 1 as long as one current displacement is accumulated to the accumulated displacement and the accumulated number is not increased when no current displacement is accumulated to the accumulated displacement.

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