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OwnerKouji Toda, Takafumi Sarata +3inventors
InventorsKouji Toda, Takafumi Sarata, Fumio Kimura, Hideki Kitajima, Masataka Shinogi
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An ultrasonic touch panel is offered which can detect whether there is a touch, at an improved accuracy without the need to adjust the detection sensitivities of individual piezoelectric bodies separately. The piezoelectric bodies have comb-like electrodes that excite ultrasonic waves. A sealant is applied to those of the side surfaces of the piezoelectric bodies which intersect with the direction of propagation of the excited ultrasonic waves. This suppresses reflection of the ultrasonic waves, thus attenuating ultrasonic waves propagating to the intersecting side surfaces. Generation of parasitic waves which would normally be caused by reflection of ultrasonic waves is prevented.
An ultrasonic touch panel comprising:
A method of fabricating an ultrasonic touch panel consisting two piezoelectric bodies placed opposite to each other, a nonpiezoelectric substrate, and a circuit board, each of said piezoelectric bodies being fitted with comb-like electrodes, said piezoelectric bodies being firmly mounted to one surface of said nonpiezoelectric substrate, said method comprising the step of:
A method of fabricating an ultrasonic touch panel consisting two piezoelectric bodies placed opposite to each other, and a nonpiezoelectric substrate, each of said piezoelectric bodies being fitted with comb-like electrodes, said piezoelectric bodies being firmly mounted to one surface of said nonpiezoelectric substrate, said method comprising the steps of:
A method of fabricating an ultrasonic touch panel consisting two piezoelectric bodies placed opposite to each other, and a nonpiezoelectric substrate, each of said piezoelectric bodies being fitted with comb-like electrodes, said piezoelectric bodies being firmly mounted to one surface of said nonpiezoelectric substrate, said method comprising the steps of:
Dependencies are inferred from the claim text.