| A touch screen display is a touch sensitive input | | | | sensor into information that is comprehensible to |
| device that performs both the functions of the | | | | the PC.There are several touch sensitive |
| video display unit and the input devices (keyboard | | | | technologies applied in manufacturing touch-screen |
| and mouse). Touch screens have been very | | | | displays. The display can be based from resistive, |
| popular in the past few years and we can see | | | | capacitive, or surface wave sensory technology. |
| them all over malls, airports, fast food | | | | A resistive touch screen display is one where a |
| restaurants, and ATMs.Touch screen technology | | | | thin metallic resistive layer acts as the main |
| has been around since the 1970s and there are | | | | sensory layer. The layer poses resistance to |
| several companies that manufacture touch screen | | | | touch and transmits it as an electrical pulse. In |
| equipments. A touch screen saves a lot of space | | | | contrast to this, the capacitive touch screen |
| and maintenance and this has made them popular | | | | display uses the capacitive tendency of the |
| for information kiosks. These touch screen | | | | human body to cause interference in its own |
| displays come either in the form of touch screen | | | | capacitive layer and sense touch. The other |
| monitors or add-on panels that are fixed over a | | | | alternative, the surface wave touch screen, uses |
| regular display monitor.A touch screen display has | | | | ultrasonic waves. These waves pass over the |
| three primary components that allow it to | | | | touch panel. Some waves are absorbed when a |
| function: the touch sensor, the controller, and the | | | | user touches the screen. This wave alteration |
| software driver. The software driver is the | | | | registers the touch event and the location.Touch |
| application program that transcribes touch | | | | screen technology uses advanced principles of |
| sensations into commands and communicates | | | | physics but the touch screen simplifies |
| with the operating system installed on the | | | | communication tremendously. With user-friendly |
| computer. The controller is a PC card that | | | | operation and an attractive interface, touch |
| connects the touch sensor to the PC. It is a small | | | | screen displays are highly preferred for games, |
| gadget that translates information from the touch | | | | training, and at information desks. |