Please enable JavaScript.
Coggle requires JavaScript to display documents.
Output devices - Coggle Diagram
Output devices
They are are electromechanical devices that receive data from a computer and translate it in a human-perceptible form
They are classified in monitors, printers, plotters, screen image protectors and speakers
Plotters: they are printers that follows the commands of the computer in order to create line drawings in paper with automated pens. They can draw point- to point lines and they are useful to engineers and for who need to realize complex graphics rountinely
-
Screen image protectors : they are output devices that can be plugged to the computer and have the function of project the computer's image in a bigger size. It is useful for making presentations easily.
-
Speakers : are output devices that worked with a computer for listening audio. These are transducers that convert digital data into analogue data.
Monitors: they are soft-copy output devices and the represent information in pictorial form. They are classified in two types :
Cathode Ray Tube (CRT) It is a vacuum tube that cointains electron guns that emit electron beams. Those are manipulates to display images
Inside the CRT there are a lot of phosphor dots( usually those are blue, red and yellow) and they glow ( in some way light up) when an electron beam passes across them for display images.
https://duenice.com/wp-content/uploads/2020/10/crtdis.jpg
Flat planet display
(LCD,)
It is a flat-panel device that uses the light- modulating properties of liquid crystals.
Liquid crystals don't emit light directly, instead they use a reflector to produce color images.
The fluorescent lights are always behind the screen and they have a thinner and lighter monitors.
And finally they are can be used with portable and non portable computer systems
https://en.wikipedia.org/wiki/File:LCD_layers.svg
Flat planet display
TFT (Thin Film Transistors) It is a type of flat planet display in which each pixel is controlled by one to four transistors. It provides the best resolution but it is the most expensive. And usually the TFT screens are called active-matrix LCDs
-
The computer follows 4 instructions they input information, store it, process it and finally they output the information
The output devices take output from the outside and convert it to binary information. The memory stores this information and then there is the CPU that is where the operations are done. And finally there are output devices that convert the information into a human-perceptible form
Some examples are: keyboards, microphones, sensors and GPS
How does it work?
When you use an input devices( for example the keyboard) this converts the information ( ex: write a word) into a binary information. As a result, it generates a number that is sent to the CPU. The Central Processing Unit asks himself how to perform these instructions( how to draw the letters of the word) and realizes a series of arithmetical operations and execute them . Finally this information is sent in binary to the screen ( an output device) that converts the binary signals into a set of colors that perform what you will see on the display.
Process: they accepts the results ( written in a code form) and then, they decode then into a human readable form.
Finally they supplies the converted results to the outside world
Output devices created computer output. These are classified in two types:
Soft-copy output: it means that it doesn't appear in such a way that it can be used without a computer.
Hard-copy output: it materializes in such a way that it can be used without a computer.
Important words: input is the data that the computer receive. Output instead, is the information that the computer sends.
An input device is any device that allows data to be entered into a computer.
An output device is any device that convert the information of a computer into a human-perceptive form.
-
-