The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2016
Filed:
Sep. 13, 2012
Hsin Chia Chen, Hsin-Chu, TW;
Yu Hao Huang, Hsin-Chu, TW;
Ren Hau Gu, Hsin-Chu, TW;
Yi Fang Lee, Hsin-Chu, TW;
Ming Tsan Kao, Hsin-Chu, TW;
Hsin Chia Chen, Hsin-Chu, TW;
Yu Hao Huang, Hsin-Chu, TW;
Ren Hau Gu, Hsin-Chu, TW;
Yi Fang Lee, Hsin-Chu, TW;
Ming Tsan Kao, Hsin-Chu, TW;
PIXART IMAGING INC., Hsin-Chu, TW;
Abstract
There is provided a click-event detection device including a light source, a light control unit, an image sensor and a processing unit. The light control unit is configured to control the light source to illuminate a finger. The image sensor receives reflected light from the finger to accordingly output a plurality of bright image frames and dark image frames. The processing unit is configured to calculate a differential image characteristic between the bright image frames and the dark image frames, to determine a plurality of operating states according to the differential image characteristic, to count a residence time at each of the operating states, and to identify a click-event according to the operating states and the residence time.