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:
May. 20, 2014
Filed:
Jun. 07, 2012
Yi-ru Cheng, Hsin-Chu, TW;
Ya-ling Hsu, Hsin-Chu, TW;
Yueh-hung Chung, Hsin-Chu, TW;
Hsueh-ying Huang, Hsin-Chu, TW;
Yi-Ru Cheng, Hsin-Chu, TW;
Ya-Ling Hsu, Hsin-Chu, TW;
Yueh-Hung Chung, Hsin-Chu, TW;
Hsueh-Ying Huang, Hsin-Chu, TW;
AU Optronics Corp., Hsin-Chu, TW;
Abstract
In an exemplary optical touch circuit and a LCD device using the same, an optical sensing unit is turned on or off according to an irradiation light intensity and accordingly generates a first signal. A first signal readout unit is electrically coupled to the optical sensing unit and turned on or off according to a first operation timing sequence and accordingly outputs the first signal. A touch reference unit is for providing a reference voltage. A second signal readout unit is turned on or off according to a second operation timing sequence and accordingly outputs the reference voltage. The touch sensing unit is electrically coupled to the first and second signal readout units and uses a voltage difference between the first signal and the reference voltage as a basis to determine that whether the optical touch circuit is touched or not.