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GCSE Computer Science > Infra-red touchscreens > Flashcards

Infra-red touchscreens Flashcards

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1
Q

What do Infra-red touchscreens use?

A

a grid pattern of LEDs and photocells (light sensors)

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2
Q

What do the LEDs do?

A

they shine infra-red light infront of the screen

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3
Q

What happens when the screen is touched by a finger?

A

the infra-red beam is interrupted

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4
Q

How does it calculate the coordinates of where the screen was touched?

A

by using a microprocessor

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GCSE Computer Science (36 decks)

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