OPTICAL NAVIGATION DEVICE AND LOCUS SMOOTHING METHOD THEREOF

摘要

There is provided an optical navigation device including an image sensor, a processing unit, a storage unit and an output unit. The image sensor is configured to successively capture images. The processing unit is configured to calculate a current displacement according to the images and to compare the current displacement or an accumulated displacement with a threshold so as to determine an outputted displacement. The storage unit is configured to save the accumulated displacement. The output unit is configured to output the outputted displacement with a report rate.

主权项

1. An optical navigation device, comprising:
an image sensor configured to successively capture images; a processing unit configured to
calculate 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 and accumulate the current displacement to an accumulated displacement; andwhen 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.