By: Jonathan Kayne. What is a touch Screen? A touch screen is a circuit that can respond to your touch, and usually has an LCD screen under it that interacts.

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Presentation transcript:

By: Jonathan Kayne

What is a touch Screen? A touch screen is a circuit that can respond to your touch, and usually has an LCD screen under it that interacts with the touch screen. The 1 st touch screen to be available to the public was called the Palm Pilot invented in 1996.

Types of touch screens There are 3 types of touch screens, 2 of them have been out for a while and are commonly used in our everyday lives. Resistive Touch Capacitive Touch Acoustic Wave

Resistive Touch Screens Resistive touch screens are used for precision work and use a Stylus, and is used in Nintendo DS, DSi, DSiXL, 3DS, Tablets, Smartboards, and that Palm Pilot. Resistive touch screens have 3 layers; a positive, a negative and an air layer. The air layer separates the positive and the negative layer and when you touch the screen, positive and negative touch, completing a circuit. The only problem with a resistive touch screen is that you have to calibrate it. Positive (+) Air layer Negative (-)

Capacitive touch screens These are the commonly used touch screens around. With these, you use your finger to work the touch screen. Capacitive touch screens are found in iPads, iPhones, iPod touch’s, Droids, and much more. Under the screen, there is a grid of very fine wires. (you can see them under the light) When you touch the screen, your finger gets “zapped” in which can be detected by the screen.

Acoustic wave touch screens Acoustic wave touch screens use sound waves that bounce off your finger which can be triangulated to find your location. This is a fairly new type of touch screen technology. This is typically the same as echolocation.

Other types of touch screens Infrared Optical Imaging Dispersive signal technology More types of touch screens! Surface acoustic wave Surface, Projected, Mutual, & Self-Capacitance Acoustic pulse recognition

Pictures!!! (iPod touch)

Thanks for watching!!! By: Jonathan Kayne Resources: