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. 30, 2007
Filed:
May. 23, 2006
Kuan-hong Hsieh, Guangdong, CN;
Shin-hong Chung, Guangdong, CN;
Han-che Wang, Guangdong, CN;
Shi-quan Lin, Guangdong, CN;
Kuan-Hong Hsieh, Guangdong, CN;
Shin-Hong Chung, Guangdong, CN;
Han-Che Wang, Guangdong, CN;
Shi-Quan Lin, Guangdong, CN;
Hong Fu Jin Precision Industry (Shen Zhen) Co., Ltd., Shenzhen, CN;
Abstract
A touch sensing apparatus includes a signal source for generating an alternating current signal, a conductor connected to the signal source, a sensor for receiving a noise generated by a contact of an object. The sensor together with the conductor form a simulated capacitor that results in alternating current signal flowing through the sensor when the sensor is contacted by the object. A detector has a first input end and a second input end. The detector results in voltage differences between the first and second input ends thereof when receiving the alternating current signal output from the sensor, and thus output a signal. A rectifying circuit is used for rectifying the alternating current signal generated by the signal source and simultaneously generating a noise. One end of the rectifier circuit is connected to the signal source and other end of the rectifier circuit is connected to the negative power input end of the detector.