output devices

Question 1

describe operation of inkjet printer

Answer 1

Rollers are used to move the paper through the printer Nozzles spray ink onto the paper
print head are moved across the paper (to distribute the ink)
Different colour inks are mixed to create required colours
Technology could be piezoelectric
Technology could be thermal bubble
Ink is heated
evaporates into a bubble
Electrical current is applied to a crystal
which forces a drop of ink through nozzle

Question 2

what is the actual process of printing

Answer 2

data sent from computer to printer
The printer driver ensures that the data is in a format that the printer can understand
printer driver ensures printer is ready to print
Data is then sent to the printer and stored temporarily in the printer buffer
then whichever printer it is carries on process

Question 3

differences between inkjet and laser printer

Answer 3

inkjet uses liquid ink/ laser uses powdered ink and toner cartridge
inkjet uses thermal bubble and piezoelectric technology while laser printer uses a charged printing drum
inkjet sprays ink in droplets on the paper while laser printer makes use of static electricity charges
inkjet uses a moving print head while laser printer does not use a moving printing head
inkjet is suitable for low volume (high quality) output while laser printer is suitable for high volume and quality output
e.g a photo/ e.g leaflets

Question 4

describe operation of lazer printer

Answer 4

makes use of toner/powder   ink     
uses (positive and negative) charged drums // rotating drum   
uses   static   charge   
no moving head
faster at printing 
high volume output/high speed  
producing flyers/leaflets/magazine

Question 5

Describe operation of 3D printer

Answer 5

This is an output device that creates an object by building layer upon layer of material by additive manufacturing
Produces output using materials such as plastic and resin
uses prototype from CAD
to create physical model

Question 6

types of cutters and operation

Answer 6

Uses a high powered laser to create the output
Creates 3D prototypes
Outputs a physical 3D product

Question 7

features of led

Answer 7

reaches maximum brightness quickly
colours are vivid
good colour definition/contrast can be achieved
screens can be thinner/thin
more reliable as LED’s are long lasting
consume very little/less energy

Question 8

describe the operation of a LED Display screen

Answer 8

It is a flat panel display
It creates images using red, green and blue diodes
It is also used in mobile devices such as smartphones and tablets

Question 9

oled

Answer 9

has 6 layers
Glass/plastic top layer
Cathode layer
Emissive layer
Conductive layer
Anode
Glass/plastic bottom layer