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. 07, 2020
Filed:
Oct. 13, 2017
Sharp Kabushiki Kaisha, Osaka, JP;
Sean Thomas George Maguire, Oxford, GB;
Diego Gallardo, Oxford, GB;
Biregeya Jean de Dieu Mugiraneza, Osaka, JP;
Yasuhiro Sugita, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A touch panel includes a. plurality of electrodes arranged in an electrode array, wherein the plurality of electrodes includes a plurality of touch panel elements. A controller is configured to measure a charge that flows into or out of an electrode of the electrode array when the electrode is charged or discharged to a particular voltage, and configured to connect neighboring electrodes in the electrode array to a reference potential and to a voltage waveform. A sensing system makes a first measurement of the charge flowing into or out of the electrode while a set of neighboring electrodes are driven with the voltage waveform, and makes a second measurement while the set of neighboring electrodes are connected to the reference potential. The controller further is configured to distinguish conductive from non-conductive objects, based on a comparison of the two measurements.