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US 2004/0104827 A1Published application
Touch panel device
AssigneeFujitsu Limited
InventorsTakashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
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AssigneeFujitsu Limited
InventorsTakashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
Estimating the term…
Each of an excitation element for exciting surface acoustic waves in two directions and a receiving element for receiving surface acoustic waves from two directions is constructed by forming a comb-like electrode on the front surface of a piezoelectric body in the form of a thin film and a plate electrode on the rear surface thereof. The comb-like electrode on the front surface has one line of bus electrode, and a plurality of electrode fingers which are extended from the bus electrode and bent in V-shape in the middle. The voltage in the excitation element and in the receiving element is controlled by providing a terminal resistance for preventing reflection of an applied AC voltage at the terminal end, between the terminal end portion of the comb-like electrode and the plate electrode, or adjusting the resistance value of the bus electrode and/or the plate electrode, or adjusting the capacitance value between the electrode finger and the plate electrode.
A touch panel device comprising an excitation element having a film-shape piezoelectric body and electrodes for exciting surface acoustic waves, and a receiving element having a film-shape piezoelectric body and electrodes for receiving surface acoustic waves, in a peripheral section of a rectangular substrate to propagate surface acoustic waves from said excitation element to said receiving element and detect a position of an object in contact with said substrate, based on received results by said receiving element, said touch panel device comprising:
A touch panel device comprising an excitation element having a film-shape piezoelectric body and electrodes for exciting surface acoustic waves, and a receiving element having a film-shape piezoelectric body and electrodes for receiving surface acoustic waves, in a peripheral section of a rectangular substrate to propagate surface acoustic waves from said excitation element to said receiving element and detect a position of an object in contact with said substrate, based on received results by said receiving element,
A touch panel device comprising an excitation element having a film-shape piezoelectric body and electrodes for exciting surface acoustic waves, and a receiving element having a film-shape piezoelectric body and electrodes for receiving surface acoustic waves, in a peripheral section of a rectangular substrate to propagate surface acoustic waves from said excitation element to said receiving element and detect a position of an object in contact with said substrate, based on received results by said receiving element,
Dependencies are inferred from the claim text.