We all heard that I have touch screen phone, mobile, pc but what actually is touch screen?
Touch screen is an input device just like any mouse or keyboard. It’s a display screen which is sensitive to human touch. Touch sensor, a controlling board and a software driver is the basic requirement of any touch screen.
Why touch screen has been made?
We all know we have mouse, keyboard but what is the need of touch screen. Actually, there are so many people who admitted that they find difficulty in handling mouse and keyboard. That the main reason why touch screen made. There is also another reason is the term portability.
There are different types of touch screen technology are available. Few shortly discussed below:
Resistive is composed of several layers.
Surface Acoustic wave technology (SAW) uses ultrasonic waves that pass over the touch screen panel.
Capacitive technology’s panel is coated with indium tin oxide that conducts a continuous electrical current over the sensor.
Infrared method uses an array of vertical and horizontal IR sensors that detect the interruption of a modulated light beam near the surface of the screen.
Strain Gauge is used to determine deflection when the screen touched.





