Patent · US Active

Optical positioning system having high resolution

US11585651B2 · kind B2 · utility

1Cited by

2References

20Claims

0Family size

Assignee

PIXART IMAGING INC. · TW

Inventors

Keen-Hun Leong · Bukit Mertajam, MY
Tong Sen Liew · Kuala Kangsar, MY
Ching-Geak Chan · Bukit Mertajam, MY

Key dates

Filing date	Jul 20, 2021
Grant date	Feb 21, 2023
Priority date	—
Expiry date	Jul 20, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG01D5/34792
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

There is provided an operating method of an optical positioning system including: capturing an image frame of a detected surface, which has interleaved bright regions and dark regions, using a field of view and a shutter time of an optical sensor; counting a number of edge pairs between the bright regions and the dark regions that the field of view passes; calculating an average value of the image frame; calculating a ratio between the calculated average value and the shutter time; determining that the field of view is aligned with one of the dark regions when the ratio is smaller than a ratio threshold; and determining that the field of view is aligned with one of the bright regions when the ratio is larger than the ratio threshold.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.