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. 14, 2015
Filed:
Jun. 04, 2012
Yi-kun LI, Hsinchu, TW;
Jui-jung Chiu, Zhudong Township, Hsinchu County, TW;
Yi-Kun Li, Hsinchu, TW;
Jui-Jung Chiu, Zhudong Township, Hsinchu County, TW;
TPK Touch Solutions Inc., Taipei, TW;
Abstract
A touch sensing circuit includes an alternative current (AC) source, a voltage division circuit, and a processing circuit. The voltage division circuit receives an AC signal outputted from the AC source and includes a first branch and a second branch on a touch sensing glass, wherein the first and second branches are adjacent to each other. The processing circuit is connected to the voltage division circuit for determining position of a touch point according to the voltages of the first branch and the second branch. In a preferred embodiment, the first branch comprises a first capacitor and a first voltage division resistor connected to the first capacitor, and the second branch comprises a second capacitor and a second voltage division resistor connected to the second capacitor.