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US 2002/0171635 A1Published application
Touch panel device
AssigneeFujitsu Limited
InventorsYuji Takahashi, Fumihiko Nakazawa, Satoshi Sano, Takashi Katsuki
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Abstract
A surface acoustic waves is excited from an excitation element disposed on a substrate, the surface acoustic wave propagated on the substrate is received by a receiving element positioned on the substrate so as to face the excitation element, and the position of an object touching the substrate is detected based on the reception result. The wave number of a burst wave applied to excite the excitation element is made equal to the number of the comb-like electrode fingers of an IDT of the excitation element.
Claims18
A touch panel device comprising:
- a substrate propagating a surface acoustic wave;
- at least one pair of excitation element and receiving element disposed to face each other on said substrate, said excitation element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and exciting a surface acoustic wave by application of a burst wave, said receiving element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and receiving the surface acoustic wave;
- and
- a detection unit for detecting a position of an object touching said substrate, based on a result of receiving the surface acoustic wave propagated on said substrate from said excitation element, at said receiving element,
- wherein a wave number of the burst wave to be applied to said excitation element is determined according to the number of said comb-like electrode fingers of said IDT of said excitation element.
2 more elements
A touch panel device comprising:
- a rectangular substrate propagating a surface acoustic wave;
- at least one pair of excitation element and receiving element disposed at peripheral sections in a diagonal direction of said substrate, said excitation element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and exciting a surface acoustic wave by application of a burst wave, said receiving element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and receiving the surface acoustic wave;
- and
- a detection unit for detecting a position of an object touching said substrate, based on a result of receiving the surface acoustic wave propagated from said excitation element in a diagonal direction on said substrate, at said receiving element,
- wherein said comb-like electrode fingers of said IDTs of said excitation element and said receiving element are connected to said electrode bases so that said comb-like electrode fingers are inclined from a facing direction of said electrode bases, and a wave number of the burst wave to be applied to said excitation element is determined according to an interval between said electrode bases of said IDT of said excitation element and an inclination angle and interval of said comb-like electrode fingers of said IDT of said excitation element.
2 more elements
A touch panel device comprising:
- a substrate propagating a surface acoustic wave;
- at least one pair of excitation element and receiving element disposed to face each other on said substrate, said excitation element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and exciting a surface acoustic wave by application of a burst wave, said receiving element having an IDT composed of facing electrode bases and comb-like electrode fingers connected to said electrode bases and receiving the surface acoustic wave;
- and
- a detection unit for detecting a position of an object touching said substrate, based on a result of receiving the surface acoustic wave propagated on said substrate from said excitation element, at said receiving element,
- wherein a wave number of the burst wave to be applied to said excitation element is determined according to a result of receiving the surface acoustic wave, which was excited by the application of the burst wave to said excitation element, at said receiving element.
2 more elements
Dependencies are inferred from the claim text.