OPTICAL NAVIGATION DEVICE AND LOCUS SMOOTHING METHOD THEREOF
First Claim
Patent Images
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 or an accumulated displacement with a threshold so as to determine an outputted displacement; and
an output unit configured to output the outputted displacement with a report rate.
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Abstract
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.
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Citations
20 Claims
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1. An optical navigation device, comprising:
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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 or an accumulated displacement with a threshold so as to determine an outputted displacement; and an output unit configured to output the outputted displacement with a report rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A locus smoothing method of an optical navigation device, comprising:
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successively capturing images with an image sensor; calculating, using a processing unit, a current displacement according to the images; and comparing, using the processing unit, the current displacement with a threshold thereby determining the current displacement is outputted or accumulated. - View Dependent Claims (12, 13, 14, 15)
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16. A locus smoothing method of an optical navigation device, comprising:
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successively capturing images with an image sensor; calculating, using a processing unit, a current displacement according to the images; comparing, using the processing unit, the current displacement with a threshold; outputting the current displacement when the current displacement is larger than or equal to the threshold; and accumulating the current displacement to an accumulated displacement and outputting a zero displacement when the current displacement is smaller than the threshold. - View Dependent Claims (17, 18, 19, 20)
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Specification