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:
Mar. 18, 2014
Filed:
May. 12, 2011
Ji Hun Kim, Daejeon-si, KR;
Hyun Min Song, Cheongju-si, KR;
Joon Ho NA, Daejeon-si, KR;
Ki Uk Gwak, Gwangju-si, KR;
Sang Gug Lee, Daejeon-si, KR;
Ji Hun Kim, Daejeon-si, KR;
Hyun Min Song, Cheongju-si, KR;
Joon Ho Na, Daejeon-si, KR;
Ki Uk Gwak, Gwangju-si, KR;
Sang Gug Lee, Daejeon-si, KR;
Silicon Works Co., Ltd., Daejeon-Si, KR;
Abstract
A circuit for measuring a capacitance value of a touch screen includes: a target capacitor unit having a target capacitor charged with a target charging voltage; a target voltage control unit to charge the target capacitor; a reference capacitor unit having a reference capacitor charged with a charging reference voltage; a reference voltage control unit to charge the reference capacitor; a comparator to compare the target charging voltage and the charging reference voltage and output a transition signal at a moment when the target charging voltage becomes higher than the charging reference voltage; and a controller to receive an output signal of the comparator and a clock signal and generate a digital output signal and a control signal, wherein a capacitance value of the target capacitor is measured using a time elapsed from a time when the target capacitor is initialized to a time when the transition signal is outputted.