Product Description
ENC can supply the touch panel from 1.2 inches to 22inches. Now our products are well be used for Mobile phone, PDA, POS, GPS and some other equipment. Now we can supply not only the 4-wire resistive touch panel, but aslo the SAW touch panel, 5-wire resistive touch panel.
4-Wire resistive touch screen is the preferred solution for low cost applications. It consists of a conductive bottom layer (ITO Glass or Film) and a conductive top layer (ITO Film). The two layers are suspended by many very small spacer dots. When a certain point is touched, the top layer contacts the bottom layer and a voltage charged by the controller is applied to the bottom layer's electrodes. The coordinate X axis of the touch point can be detected by measuring the voltage value thru the top ITO layer and the coordinate Y axis of the touch point can be detected in the same way by changing voltage input to the top layer's electrodes.

This specification suit analog resistance touch panel. Which used in LCD module
Apply To Specification
Surface Hardness: 3H
Optical Clarity: 80 %
Operating Temperature: -10'C ~ 60'C
Endurance Test strikes: Over 1 million
Operating Voltage: DC5V
Resistance: 200W ~ 900W
Linearity< 1.5%
Faceplate Surface: Anti-glare coating
Operation Pressure: 15 ~ 70g
Storage Temperature: -20'C ~ 70'C
Message Noise: 5 m sec ~ 15 m sec
Operating Current: 5mA ~ 25mA
Isolation Resistance: 20MW DC25V
Optical Performance
Light transparency should keep above 80% under the visible wave when the wave length is 550nm
Electrical Performance
Connector Resistance
200次< X Axis <800次
300次< Y Axis <900次
Insulation Resistance
20M次 @ DC 25V
Electrostatic Endurance
No abnormal appearance after 10kv, 100W, 250PF electrostatic used.
Linearity
X Axis: 1.5% Y Axis: 1.5% Operating Voltage
3V ~ 7V DC
Operating Current
5mA ~ 25mA