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:
Jul. 28, 2015
Filed:
May. 18, 2011
Tetsuo Tokudome, Hiroshima, JP;
Tetsuo Tokudome, Hiroshima, JP;
U-SHIN LTD., Tokyo, JP;
Abstract
Provided is a touch sensor stable against environmental variation comprising an oscillator which outputs a periodical operation signal, an antenna electrode which has a electrostatic capacitance straining the operation signal to form an output signal, a detection circuit which generate a detection value corresponding to a difference between the output signal and a predetermined reference voltage, a determination means which determines whether a human body is proximate to the antenna electrode, based on the detection value, wherein a frequency of the operation signal is varied so that the detection value gets closer to a predetermined standard value.