| 摘要 |
A touch panel includes: a touch panel substrate (41) having an input surface (41a); a cover film (42) arranged separately from the input surface (41a), and facing to the input surface (41a); spacers (43) extending upright from the touch panel substrate (41) toward the cover film (42); a transmitter (51, 54) causing surface acoustic waves (Wvx, Wvy) to be propagated on the input surface (41a); a receiver (52, 53) measuring the surface acoustic waves (Wvx, Wvy) propagated on the input surface (41a); a memory (63) storing, as reference values, measurement values of the surface acoustic waves (Wvx, Wvy) when the cover film (42) is not being pressed; and a determination section (64) detecting, as touch input positions, positions at which a difference between the measurement values of the surface acoustic waves (Wvx, Wvy) when the touch panel (50) is being used and the reference values is significant.
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