PROTECTION PANEL HAVING TOUCH INPUT FUNCTION OF ANALOG RESISTANCE FILM METHOD

摘要

A protection panel has a touch input function of the analog resistance film method which detects X-Y coordinates as an operation position by a potential gradient according to a touch operation on a front surface side substrate (6). A switch (12) is arranged on a rear surface side substrate (5) and a front surface side substrate (6). Contact points (5G, 6G) are connected in series via routed circuits (5C, 6C) to resistance films (5A, 6A) so as to have a potential difference and arranged to oppose to each other at a predetermined distance when the rear surface side substrate (5) is connected to the front surface side substrate (6). When voltage is applied by the contact points (5G, 6G) between a pair of electrodes (5D, 6D) of the rear surface side substrate (5) or the front surface side substrate (6), the switch (12) detects presence/absence of the contact of the contact points (5G, 6G) according to the voltage detected by the other pair of electrodes (6D, 5D).