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. 27, 2016
Filed:
Oct. 11, 2013
Nlt Technologies, Ltd., Kawasaki, Kanagawa, JP;
NLT TECHNOLOGIES, LTD., Kawasaki, Kanagawa, JP;
Abstract
When an excitation frequency of a touch panel is coincident with or in the vicinity of a frequency of external noise, noise cannot be removed by a bandpass filter. Also when a touch detecting operation period is limited to a short period of time such as a non-address period, frequency resolution is reduced and a noise removal effect of averaging is reduced, so that an S/N ratio is decreased. The electronic apparatus of the present invention includes a sensor systeman excitation generating unitwhich generates an intermittent sine wave signal and applies the same to the sensor system, and a demodulation unitwhich demodulates an amplitude modulated signal which is an output of the sensor system, in which the demodulation unit generates a demodulated signal D(t) using both a response x(t) of the sensor system in a period when the excitation generating unit outputs a sine wave and a response z(t) of the sensor system in a period, at least either immediately before or immediately after the above-mentioned period, when the excitation generating unit does not output a sine wave.