Device Structure of Low Coordinate Distortion Touch Panel Sensor Using Resistive Films with Electromagnetic Wave Shield Effect

Abstract

Device structures of low coordinate distortion touch panel sensors using resistive films with electromagnetic wave shield effect have been investigated. The electromagnetic wave effect , optical transmittance and coordinate distortion characteristics were analyzed for sensors with ITO(Indium Tin Oxide) resistive transparent films. In results of these analysis, a device structure with two kinds of ITO films has been acquired. In the sensor, sheet resistivity of one ITO film is 10Ω, and ITO film of another side has 500Ω of sheet resistivity. Coordinate characteristics were analyzed by using of current continuous equation. By the analysis, electrode structures for low coordinate distortion characteristics have been obtained.