Touch Screen Technology How does it work?

If you do not consider how familiar the screen of your finger or stylus, touch screen technology may seem mysterious. Touch screen technology advances, they should also make the user interface for people who are new to modern technology in popularity because more and more exciting.


There are three basic systems of writing this article understands your touch screens and infrared technology is also being prepared for the fourth game system, also made further improvements to the system in different scales in the process.


First resistance system, the conductive and resistive metallic sheet used to cover the glass panel. The screen is on, the electric current flowing through the two layers, keeps these two layers apart. There is also a scratch protection layer covering the metallic layer. When the user touches the screen, the two layers are forced to touch each other at that point. When the ignition occurred would be changes in the electric field at that point and the point's coordinates as the contact is sent to a computer which calculates where it is in there and do it, that at that point in touch of what it means to send the operating system to decide.


The capacitive system consists of a full electric charge holding layer on the glass panel. When a finger touches the screen, a portion of the charge passes to the fingers. reduction in the charge amount is measured by circuits which are arranged at the corners of the screen. And relative reduction in charges on the four corners, used for computer calculations of where the finger touches.

The system maintains a pair of surface acoustic wave transducers on the edges of the glass plate. Glass is placed into the reflector to reflect the electrical signal sent from one transducer. It is disturbed electrical signal when a finger touches the screen and the computer calculates the correct inverter using two contact points.

Surface acoustic system permits the passage of 100% of the light from the monitor does not use the metallic plate, which provides a clearer image. The monitor light-emitting-resistant system relative to the capacitive system emits 75% and 90% gives better quality image.