Disadvantages Of Capacitive Touch Screen

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Capacitive touch screen: The capacitive touch screen made up of an insulator such as glass. The glass is coated with a transparent conductive material like Indium Tin Oxide (ITO).Since human body has the ability to conduct electricity, a simple touch in to the capacitive touch screen results in the malformation of the screen surface’s electrostatic field, which may be quantifiable as a variation in capacitance. Verities of techniques are employed for determining the touch locations on the screen. Then the controller processes these touch locations. Advantages of Capacitive touch screen: • Multi touch can be implemented in this capacitive touchscreens • Capacitive touch screen are moderately durable • Capacitive touch screen provides high resistant to scratches and impacts. • Capacitive touch screen are easy to clean. • Faster typing speeds can be achieved using this capacitive touch screen technology. • The capacitive touch …show more content…

There are two transducers- a transmitting and the other one is the receiving, is used in the Surface acoustic wave touch screen technology. These two transducers are placed along the X and Y axis of the touch screen monitor’s glass plate layer. Some reflectors are also placed along with these glass plates. The acoustic or the ultrasonic waves spread across the glass plate and bouncing off by the sensors. When we made a touch on the touch screen, since the wave is pass over the screen, a small part of the wave gets absorbed. So there is a change in the wave’s transmission occurred over the touch screen panel surface. This change in the waves due to the touch can be identified and send it to the controller for the evaluation and processing of the touch position on the screen. The surface acoustic wave touch screen can be easily damaged by the contaminants and other outside

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