DMC TP-4448S1 HMI Touch Screen Monitor Repair

TP-4448S1 touch screen glass size: inch and other general size is 3.0'' to 22'' . TP-4448S1 touch screen adopt to panel display device. TP-4448S1 touch panel touch times are more than 1 million touches. TP-4448S1 touch screen display Current: 5mA~25mA. TP-4448S1 touch digitizer glass operation system including: Linux / DOS / Windows ME/95/98 / NT4.0/XP/2000/Mac OS etc. TP-4448S1 HMI touch glass temperature operating range: -10° C ~ 60° C. TP-4448S1 MMI touch screen Operation Voltage : Typical +DC 5V.

Principle of operation of Resistive TP-4448S1 Touchscreen
Detects input position by load
When the TP-4448S1 panel is pressed, the upper substrate flexes and the upper and lower ITO electrodes (X/Y electrodes) contact and conduct each other to detect the input.

An insulator (dot spacer) is placed between the upper and lower ITO electrodes to prevent short-circuit between the electrodes when no input is made. Resistive TP-4448S1 touchscreens can be roughly divided into two types: analog type and digital (matrix) type.