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Touch Screen Technology

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Jacob Sullivan

on 16 September 2013

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Transcript of Touch Screen Technology

The first touch screen was a capacitive touch screen invented by E.A. Johnson at the Royal Radar Establishment, Malvern, UK, around 1965 - 1967.
In 1974, the first true touch screen incorporating a transparent surface came on the scene developed by Sam Hurst and Elographics.
In 1983, the computer manufacturing company, Hewlett-Packard introduced the HP-150, a home computer with touch screen technology.
In 2007, Apple introduced the iPhone which used pure touch screen technology.
The touch sensor is a panel with a touch responsive surface.
Software tells the computer, smartphone, game device, etc, what's happening on the sensor and the information coming from the controller. Who's touching what where; and allows the computer or smartphone to react accordingly.
Touch Screen
Using this software, along with the touch screen, you can play games such as Doodle Jump.
Software also allows you to take a picture with the tap of your finger.

There are three ways that a human's touch can be recognized by touch screens: resistive, capacitive and Surface acoustic wave.

Software tells the computer, smartphone, game device, etc, what's happening on the sensor and the information coming from the controller, who's touching what where, and allows the computer or smartphone to react accordingly.

The resistive touch screen system contains two layers, a normal glass panel which is covered by a conductor and a resistive metallic layer.
An electrical current runs through the two layers. When a human touches the screen, the two layers touch in that exact spot.
This change in the electrical field is recognized and the coordinates of the point of contact are calculated by the computer.
Once the coordinates are known, a special driver translates the touch into something that the operating system can understand, much as a computer mouse driver translates a mouse's movements into a click or a drag.
A capacitive touchscreen panel consists of an insulator such as glass and is coated with a transparent conductor. As the human body is also a conductor, touching the surface of the screen results in a distortion of the body’s electrostatic field, measurable as a change in capacitance.
Capacitive touch screens are newer technology. The iPad is a common example of the capacitive touch screen.
The End
Bellis, Mary. "Who Invented Touch Screen Technology?" About.com Inventors. About.com, n.d. Web. 10 June 2013.
How do touch-screen monitors know where you\u0027re touching?" 04 September 2001. HowStuffWorks.com. <http://www.howstuffworks.com/question716.htm> 10 June 2013.
How Do Touch-screen Monitors Know Where You're Touching?" HowStuffWorks. N.p., n.d. Web. 10 June 2013.
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