A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. Touch screens are used with information kiosks, computer-based training devices, and systems designed to help individuals who have difficulty manipulating a mouse or keyboard. Touch screen technology can be used as an alternative user interface with applications that normally require a mouse, such as a Web browser. Some applications are designed specifically for touch screen technology, often having larger icons and links than the typical PC application. Monitors are available with built-in touch screen technology or individuals can purchase a touch screen kit.
A touch screen kit includes a touch screen panel, a controller, and a software driver. The touch screen panel is a clear panel attached externally to the monitor that plugs into a serial or Universal Serial Bus (USB) port or a bus card installed inside the computer. The touch screen panel registers touch events and passes these signals to the controller. The controller then processes the signals and sends the data to the processor. The software driver translates touch events into mouse events. Drivers can be provided for both Windows and Macintosh operating systems. Internal touch screen kits are available but require professional installation because they must be installed inside the monitor.
History of Touch screen
The first "touch sensor” was developed by Dr. Sam Hurst, founder of Elographics, while he was an instructor at the University of Kentucky in 1971. This sensor was called the "Elograph", and was patented by The University of Kentucky Research Foundation. The "Elograph" was not transparent as are touchscreens, but was a significant mile-stone for touch technology. The first true touch screen came on the scene in 1974, again developed by Dr.Hurst, of Elographics. In 1977, Elographics developed and patented five-wire resistive technology, the most popular touch screen technology in use today. On February 24, 1994, the company officially changed Its name from Elographics to Elo TouchSystems.
What are Touch Screens?
The touch screen is the most user friendly PC interface. It is an input device, a way to communicate with the PC. The user touches the screen to select options presented on the screen. Associated hardware and software are used to determine the location of the press.
Conclusion:
Touch Screen is widely used and emerging technology that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen. It provides a very good user interface with applications that normally require a mouse.It is very useful in various fields like Museum / tourism displays, railway station, casino and other gaming systems, Airport, telephone exchange etc.It has good future in many new technologies like in cell phones, palmtops, laptops etc.
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