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:
Feb. 23, 2010
Filed:
Oct. 30, 2003
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 burst wave is applied to an excitation element of a touch panel main body from an oscillation section so as to excite surface acoustic waves, and the excited surface acoustic waves are received by a receiving element of the touch panel main body. The received signals are A/D converted by a receiving section, and a control section calculates the contact position and the contact width of the object in contact with the touch panel main body, based on time-series changes in the received strength. Based on the received strength of surface acoustic waves, the control section controls the wave number of the burst wave to be applied to the excitation element.