Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2007-03-20
2007-03-20
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S173000, C310S31300R
Reexamination Certificate
active
10019190
ABSTRACT:
An object of the present invention is to provide a coordinate input device of touch-type capable of giving an electric signal to a transducer, even if a piezoelectric vibrator having electrodes on both surfaces thereof is employed.A device according to the present invention comprises: acoustic wave transducers (piezoelectric vibrators)3aand4a, each functioning for oscillating a bulk wave (a first wave) toward a top surface2of a substrate1; a planar wiring7formed on a back surface of the substrate1by the method such as transfer printing with conductive paste, for supplying said piezoelectric vibrator with electric power; a connecting device8for connecting said planar wiring with an electrode of each of said acoustic wave transducers3aand4a; diffractive acoustic wave mode couplers9a–10b, each functioning for converting said bulk wave into a surface acoustic wave (a second wave) and vice versa; and a means for detecting a scatter in the surface acoustic wave (the second wave) on the top surface of said substrate. Employing the combination of the planar wiring and the connecting device can resolve the problem of fragility associated with a cable wiring even in the piezoelectric vibrator having the electrodes on both surfaces thereof.
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Kanbara Shigeki
Kaneda Hiroshi
Hjerpe Richard
Nguyen Kimnhung
Touch Panel Systems
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