Touch panel

Abstract

A touch panel includes a transparent dielectric substrate having a generally rectangular shape, a first conductive film formed on a first surface of the dielectric substrate, a second conductive film formed on a second surface of the dielectric substrate, four electrodes formed at four respective corners of the first conductive film, four current detecting units coupled to the four electrodes, respectively, and an alternating-current power supply configured to apply alternating-current voltage between the first conductive film and the second conductive film, wherein the alternating-current power supply is electrically coupled to the first conductive film through the four current detecting units and the four electrodes.

Dependencies are inferred from the claim text.