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. 28, 2010
Filed:
Aug. 16, 2005
Yuji Takahashi, Kawasaki, JP;
Fumihiko Nakazawa, Kawasaki, JP;
Satoshi Sano, Kawasaki, JP;
Takashi Katsuki, Kawasaki, JP;
Yuji Takahashi, Kawasaki, JP;
Fumihiko Nakazawa, Kawasaki, JP;
Satoshi Sano, Kawasaki, JP;
Takashi Katsuki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A touch panel device includes an excitation transducer for exciting a surface acoustic wave upon application of a burst wave and a reception transducer for receiving the surface acoustic wave and converting the same into a reception signal that are arranged at a peripheral portion of a detection area so that a position of an object touching the detection area is detected in accordance with a change in the reception signal. A control method for eliminating noises in the touch panel device includes the steps of detecting a differential between a reception signal due to a burst wave and another reception signal due to another burst wave, deciding that there is a noise if the detected differential exceeds a preset threshold value, and performing a control operation so that the detection of an object based on the reception signal is not performed in accordance with the decision.