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:
Dec. 31, 2013
Filed:
Feb. 17, 2011
Takayasu Otagaki, Hashima, JP;
Atsuhiro Ichikawa, Mizuho, JP;
Hiroya Ito, Ichinomiya, JP;
Kazuhiro Hasegawa, Ichinomiya, JP;
Takayasu Otagaki, Hashima, JP;
Atsuhiro Ichikawa, Mizuho, JP;
Hiroya Ito, Ichinomiya, JP;
Kazuhiro Hasegawa, Ichinomiya, JP;
On Semiconductor Trading, Ltd., Hamilton, BM;
Abstract
This invention offers an electrostatic capacity type touch sensor that can be calibrated in a short period of time at a moment when a finger of operator or the like does not touch a touch pad. An absolute value of a difference (AD−AD) between a first output voltage ADand a third output voltage ADis compared with a first threshold value Vtrin step S. When the difference (AD−AD) between the output voltages is smaller than the first threshold value Vtr, it is judged that the finger of operator or the like does not touch the touch pad, and it is judged which of an offset in a second output voltage ADand an offset in the third output voltage ADis smaller than the other. When the offset in the second output voltage ADis smaller than the offset in the third output voltage AD, the modification to the second calibration data Xis permitted.