Output devices Flashcards
How do speakers and headphones work?
By pushing and pulling the surrounding air molecules in waves. The waves are created by moving a speaker cone with electromagnets.
LCD (Liquid Crystal Display) how does it work?
It uses the light modulating properties of liquid crystals which can be changed into a solid or a liquid using an electrical field. The change of state allow light to shine through or to block it off for individual pixels. To get a colored display, we would need to add a layer of colored sub-pixels.
LED-backlit display How does it work?
It works the same way as LCD but the light source is an array of LED bulbs.
True LED display how does it work?
They use an array of LEDs as pixels to produce the image.
What is an actuator?
Mechanical output device that is responsible for moving or controlling a mechanism.
How does a DLP work?
It uses a large number of tiny mirrors which are arranged in a grid and can be tilted away or towards from the light source, reflecting light towards a projection lens. Each mirror creates one pixel in the projected image. To add color, the light passes through a color wheel.
What is an output device?
Transfer of data from inside a computer to an external media.
