Touch screens are great. There's no fuss about a crazy mouse, or anything. There is less physical hassle between you and the computer. Touch screens are, without a doubt, advanced when it comes to human-computer communication.
How do they work?
Touch screens are displays that can detect and recognize the presence and location of a touch around the screen area. This touch that the touch screen can recognize can by made by a finger, a hand or even other passive objects such as the stylus. It gives people the ability to directly interact with the computer. The science behind these sleek machines is crisscrossing beams, which is protected by a clear plastic layer which acts like a skin.
Lately, with developments, the kinds of touch that can be recognized by it has increased. Touch seems to have become even more sophisticated.
Some leading providers
Here are some of the leading providers and/or manufacturers of the touch screen:
a. Aurora Multimedia
b. CyberTouch
c. TekVisions
d. TouchSystems Corporation
e. CeroView
f. Crestron Electronics, Inc.
g. Elo TouchSystems
h. Keytec, Inc.
i. Liyitec Inc.
j. Maple Systems, Inc.
More on touch screens
The most significant difference touch screens have with other screens is the recognition of touch, ergo the heightened directness in the interaction between the human and the computer. Different kinds of touch screens on the other hand, differ in which device it is used, and how much variety of touches can it understand. For example, the touch screen of the ATM can only sense one touch - for selecting. Meanwhile, iPhones can sense a different kind of touch for scrolling (dragging your finger up or down the screen), and a different kind of touch for zooming in ("pinching" the screen or "stretching" it).
Touch screens are most widely used in mobile phones. The latest phones today are touch screens, actually. Touch screens are also used in ATMs, Personal Digital Assistants (PDAs), Satellite Navigation Devices (widely used in Japan, Singapore, the U.S., and countries in Europe; usually found in cars), gaming consoles such as the Nintendo DS, and the LCD monitor.
The touch screen is also used in the iPod - namely the iPod Touch. But touch screens aren't really used that much for mp3 players.
Sources
http://en.wikipedia.org/wiki/Touch_screen
http://www.electronics-manufacturers.com/Electronic_components/Electronic_display_devices/Touch_screen_displays/
http://computer.howstuffworks.com/question716.htm
moodle lecture
Accessed August 4,2009
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