Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2007-02-27
2007-02-27
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C178S018040, C310S31300R, C310S31300R, C310S31300R, C345S177000
Reexamination Certificate
active
10704778
ABSTRACT:
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.
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Platshon M; “Surface Acoustic Wave Technology Expands Uses of Touch-Screen” Computer Technology Review, Westworld Production Co., Los Angeles, US, vol. 77, No. 13(Sep. 21, 87) pp. 18-21.
Katsuki Takashi
Nakazawa Fumihiko
Sano Satoshi
Takahashi Yuji
Beck Alexander S.
Lefkowitz Sumati
Westerman, Hattori, Daniels & Adrian , LLP.
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