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:
Apr. 23, 2013
Filed:
Apr. 15, 2011
Tzung-min Su, Hsin-Chu, TW;
Chih-hsin Lin, Hsin-Chu, TW;
Hsin-chia Chen, Hsin-Chu, TW;
Cho-yi Lin, Hsin-Chu, TW;
Tzung-Min Su, Hsin-Chu, TW;
Chih-Hsin Lin, Hsin-Chu, TW;
Hsin-Chia Chen, Hsin-Chu, TW;
Cho-Yi Lin, Hsin-Chu, TW;
PixArt Imaging Inc., Science-Based Industrial Park, Hsin-Chu, TW;
Abstract
An optical sensing system includes a sensing area, a reflective mirror, a first image-sensing device, a second image-sensing device, and a processing circuit. The sensing area is an area in which a plurality of pointing objects may execute touch operation. The reflective mirror generates a mirror image of the sensing area. The first image-sensing device and the second image-sensing device respectively capture images including all or part of the pointing objects in the sensing area, and all or part of the pointing objects in the reflective mirror. The processing circuit generates candidate coordinates according to the images captured by the first and the second image-sensing devices, and obtains the locations of the pointing objects from the candidate coordinates by means of the symmetric relationship between the point objects and the corresponding mirror images with respect to the reflective mirror. In this way, the optical sensing system can perform multi-touch operation.