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:
May. 13, 2014
Filed:
Mar. 03, 2011
Tomohiko Nishimura, Osaka, JP;
Jin Miyazawa, Osaka, JP;
Tomohiko Nishimura, Osaka, JP;
Jin Miyazawa, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In order to provide a touch sensor-equipped display device that is not susceptible to the effect of noise caused by a polarity reversal in a common voltage of a display device without using special circuitry, the disclosed touch sensor-equipped display device is provided with: a sensor output read circuitthat is sequentially connected to a plurality of sensor electrodes of a touch sensor partand that outputs a signal voltage according to the electrical properties of each electrode; a sensor control circuitthat supplies a control signal to the sensor output read circuit; and a coordinate calculation circuitthat detects a contact position on the basis of the signal voltage. The coordinate calculation circuitis provided with: an averaging circuitthat calculates the average values of signal voltage values obtained during a scan that was started in synchronization with a horizontal synchronization signal when the common voltage is reversed from positive polarity to negative polarity, and the signal voltage values obtained during a scan that was started in synchronization with a horizontal synchronization signal when the common voltage is reversed from negative polarity to positive polarity; and a contact position detection circuitthat detects the contact position on the basis of the average values.