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Understanding touch screen systems
Uses for touch screen systems
Touch screen systems have become so popular today you can find them on everything from your computer, to your cell phone to your local grocery store purchase line. Touch screen systems can make many things in today's world faster and more efficient. Touch screen systems at the point of sale (POS) in places like stores also make for a better shopping experience for many people.
Cash registers with POS systems have come a long way from manual push-button tally machines and are now computerised systems, many of them touch screen systems, with complex computer systems at their core. And the payment options customers have often include using touch screen systems. The device through which debit and credit cards are swiped usually has a touch screen that requires use of a stylus or fingertip to authorise the transaction, ask for cash back and enter a PIN number.
Benefits of touch screen systems
Touch screen systems make using them much more efficient that using even a very advanced computerised cash register. Because any type of command can appear on the screen, the register with a touch screen isn't limited by its keyboard and keypad. It can generate any type of prompts on the screen for the user to touch, and can change the available 'keys' and prompts quickly. This type of system has far fewer restrictions than a standard input system. It requires less training for users, too. A user won't have to remember certain key combinations or commands when the touch screen system can present a simple place to touch on the screen for virtually any purpose at any time.
Because there are fewer things to memorise and the user isn't limited by a finite number of keys or buttons, using the system is much faster than using a regular cash register or POS system. That means that more customers can be served in a shorter amount of time. Each customer has a shorter wait to be taken care of, and fewer problems with user confusion and mistakes take up time.
How touch screen systems work
Touch screen systems use one of four different kinds of technology. Infrared is the fourth kind which is just starting to really come into its own in use in touch technology. The other three are more widely used. Touch screens that have a glass outer panel actually have another, metallic layer on top of that. This type of system is called a resistive system. When someone touches the screen, it presses the metallic layer to the glass, and changes the electrical field in that spot, which the system measures and calculates.
Capacitive touch screen systems have a layer on top of the glass that holds an electrical charge. When this is touched, the charge in the layer lowers in that spot as the charge goes into the finger instead. That change is measured and calculated.
The third technology used in touch screen systems is surface acoustic wave technology that sends a signal from one side of the screen to the other that's disturbed when a finger touches the screen.
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