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:
Jan. 12, 2016
Filed:
Jul. 16, 2013
Kabushiki Kaisha Tokai Rika Denki Seisakusho, Aichi, JP;
Tomomi Shimizu, Aichi, JP;
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO, Aichi, JP;
Abstract
An input device includes a selection circuit that is connected to a plurality of electrodes provided on a capacitive touch panel and selectively connects the plurality of electrodes, a calibration resistor connected to the selection circuit, a constant current source for supplying constant current power to the plurality of electrodes and the calibration resistor, an A/D converter connected to the selection circuit to measure capacitance of the plurality of electrodes and a measured value measured when the calibration resistor is connected, and a control unit controlling the selection circuit to make the A/D converter measure the capacitance of one of the plurality of electrodes and the measured value measured when the calibration resistor is connected, and determining a contact coordinate of the touch object on a touch panel by calculating a ratio of the capacitance to the measured value.