IGCSE-CS: Touchscreens

This is made up of many layers of glass that act like a capacitor

• Infra-red heat

• Infra-red optical

• capacitive

• resistive

This makes use of an upper layer of polyester(a form of plastic) and a bottom layer of glass

• infra-red optical

• infra-red heat

• capactive

• resistive

Uses an array of sensors in a form of a grid

• infra-red heat

• infra-red optical

• resistive

• capacitive

Signals are then sent out which are interpreted by a microprocessor , the calculations determine the coordiantes

• infra-red heat

• infra-red optical

• capacitive

• resistive

This is a medium cost technology

• infra-red heat

• infra-red optical

• capacitive

• resistive

This __________ only allows use of bare fingers

• infra-red optical

• infra-red heat

• capacitive

• resistive

Allows multi touch capabilities

• infra-red heat

• infra-red optical

• capacitive

• resistive

It is the most inexpensive technology

• infra-red heat

• infra-red optical

• capacitive

• resistive

Screen visibility is poor in strong sunlight

• infra-red heat

• infra-red optical

• capacitive

• resistive

The screen is very durable

• infra-red heat

• infra-red optical

• capacitive

• resistive