Poor visibility in sunlight

Wears through time & vulnerable to scratching

Inexpensive to manufacture

Found in ticket machines and ATMs

Sensitive to dust and dirt

Expensive to manufacture

Found on some eReaders, some interactive whiteboards, indoor ticket machines

When the top layer of the screen is pushed/touched into the bottom layer the electrical current changes

When your finger (or stylus) touches the screen, the current changes

Sensors detect where the screen has been touched by detecting a break in the beams

Uses a pattern of LED infra-red beams to form an ‘invisible’ grid on the screen

Electrical current is sent from the four corners of the screen

Uses multiple layers of material that transmit electrical currents