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. 26, 2019
Filed:
Sep. 08, 2015
Shanghai Tianma Micro-electronics Co., Ltd., Shanghai, CN;
Tianma Micro-electronics Co., Ltd., Shenzhen, CN;
Hong Li, Shanghai, CN;
Cheng Cheng, Shanghai, CN;
SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., Shanghai, CN;
TIANMA MICRO-ELECTRONICS CO., LTD., Shenzhen, CN;
Abstract
It is provided a filtering circuit and a touch display device. The touch display device includes: a substrate; a common electrode arranged on the substrate; a signal source configured to provide a display signal or a touch signal; a filter capacitor including a first terminal and a second terminal, where a fixed electric potential is applied to the second terminal of the filter capacitor; and a control switch arranged between a common electrode lead and the first terminal of the filter capacitor to electrically connect/disconnect the filter capacitor with/from the common electrode lead. In a case that the signal source provides a display signal, the control switch is switched on to electrically connect the filter capacitor with the first node. In a case that the signal source provides a touch signal, the control switch is switched off to electrically disconnect the filter capacitor from the first node.