Touch Screens

All about touch screens and what they are!

What are they?

Touch screens are what most phones, tablets, iPod's and some laptops have today. They are a way of using your device without the hassle of buttons and controls. This flyer will tell you all about them and how they work.

Big image

Different types of Touchscreens

  • Resistive touch screens - Resistive touch screens consist of a flexible top layer of polyethylene and a rigid bottom layer made of glass. Both of these layers are coated with a conducting compound called indium tin oxide. They are then spaced with spacers and whilst the monitor or screen is being used an electric current flows between the two layers. When the screen is touched the flexible top layer is forced down to touch the bottom layer and a change in electrical current is detected. The controller then calculates the coordinates of the point of touch and the operating system makes sure the device acts accordingly.
Resistive Touchscreens

Click here to see more diagrams of Resistive Touchscreen diagrams!

Big image
How Touchscreen Works [Remake]

Different types of Touchscreens

  • Capacitive touch screens - Unlike resistive touch screens capacitive touch screens do not rely on the pressure of your finger to work. They are made of copper and indium tin oxide. When your finger hits the screen of a Capacitive touch screen a small electrical charge is transferred to the finger to complete the circuit. This creates a voltage drop on this point of the screen and this is why they don't work when your wearing gloves. The software works out the point of the voltage drop and reacts how you want it to.
Big image
Capacitive Touchscreens

Click here to see more diagrams of Capacitive touch screens!

When, where and who invented Touchscreens?

Who - Dr G. Samuel Hurst

Where - America

When - 1970's


Dr G. Samuel Hurst an american scientist, first invented touch screens almost by accident, in the early 1970's.

A Brief History of Touchscreens

Big image