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:
Jun. 09, 2015
Filed:
Oct. 05, 2011
Chih Hung LU, Hsinchu, TW;
Tzung Min Su, Hsinchu, TW;
Chih Hsin Lin, Hsinchu, TW;
Hsin Chia Chen, Hsinchu, TW;
Cheng Nan Tsai, Hsinchu, TW;
Chih Hung Lu, Hsinchu, TW;
Tzung Min Su, Hsinchu, TW;
Chih Hsin Lin, Hsinchu, TW;
Hsin Chia Chen, Hsinchu, TW;
Cheng Nan Tsai, Hsinchu, TW;
Pixart Imaging Inc., Hsin-Chu, TW;
Abstract
An optical touch screen system includes a touch screen, an image-sensing device, and a processing device. The image-sensing device generates a plurality of light-shielding information of an object at a plurality of time points. The processing device coupled to the image-sensing device includes a computing unit calculating a projected size difference value according to the plurality of light-shielding information, wherein the projected size difference value is a difference value between the projected sizes of the object on the touch screen at two different time points.