Patent ID: 6756973
Filing Date: 2004-06-29
Classification: G06F

Abstract:
A touch panel device comprising:a rectangular non-piezoelectric substrate; at least one pair of excitation element and receiving element disposed at peripheral sections in a diagonal direction of said non-piezoelectric substrate, said excitation element having an IDT constructed by joining comb-like electrode fingers to facing electrode bases and exciting a surface acoustic wave, said receiving element having an IDT constructed by joining comb-like electrode fingers to facing electrode bases and receiving the surface acoustic wave; and a detection unit for detecting a position of an object touching said non-piezoelectric substrate, based on results of receiving surface acoustic waves propagated from said excitation element in a diagonal direction on said non-piezoelectric substrate at said receiving element, wherein said comb-like electrode fingers of said IDTs in said excitation element and receiving element are joined to said electrode bases so that said comb-like electrode fingers are inclined from a facing direction of said electrode bases.