Touch screen

Touch screen devices are very common interface in the new generation mobile phones , PDAs, MP3 players,etc . The revolutionary introduction of Apple iphone increased the popularity of touch screen world wide. a Different technologies are being used for construction of touch screen displays, such as Resistive, Capacitive,Strain guage, Surface Capacitance, Projected Capacitance, Infra red, Optical imaging, Acoustic pulse recongnization etc, depending upon the application and device. Irrespective of the technology, touch screens are coming under the category of sophisticated devices, whose physical and electrical characteristics may vary temporarily / permanently according to the environmental conditions. Here some points to be remembered while handling the devices with touch screen panels.