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:
Oct. 01, 2013
Filed:
Jan. 03, 2011
Ching-chun Lin, Taipei County, TW;
Wing-kai Tang, Hsinchu, TW;
Ching-ho Hung, Hsinchu, TW;
Tsen-wei Chang, Taichung County, TW;
Yi-liang Lin, Hsinchu County, TW;
Jiun-jie Tsai, Hsinchu, TW;
Ching-Chun Lin, Taipei County, TW;
Wing-Kai Tang, Hsinchu, TW;
Ching-Ho Hung, Hsinchu, TW;
Tsen-Wei Chang, Taichung County, TW;
Yi-Liang Lin, Hsinchu County, TW;
Jiun-Jie Tsai, Hsinchu, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A touch sensing system including a touch input interface and a capacitance sensing circuit is provided. The touch input interface includes a plurality of sensing capacitors for outputting a capacitance under test and a reference capacitance. The capacitance sensing circuit includes a first sensing channel, a second sensing channel, and a difference comparing unit. During a first period of the sensing period, the first sensing channel senses the capacitance under test, and the second sensing channel senses the reference capacitance. During a second period of the sensing period, the first sensing channel senses the reference capacitance, and the second sensing channel senses the capacitance under test. The difference comparing unit outputs a difference according to the capacitance under test and the reference capacitance. Additionally, a capacitance sensing method is also provided.