Unit 2 Output Devices Flashcards
What is an output device?
Hardware devices that allow information to be sent out of a computer system - show the results of processing
What are CRT (cathode ray tube) monitors used for?
instantly see outputs - monitor screen
What are the advantages of CRT?
Can be used with a light pen
Produce a large range of colours
Have a good screen angle
Cheaper than other options
What are the disadvantages of CRT?
Large and bulky
Create a lot of heat
Have a lot of screen glare
Use more power and therefore are more expensive to run
What are TFT (thin film resistor) monitors used for?
instantly see outputs - monitor screen - thin, flat screen
What are the advantages of TFT?
Lightweight Very thin Less glare Uses less power Emits less radiation Emits less heat
What are the disadvantages of TFT?
Images can be unclear
Lower picture quality
Cannot be used with light pens
What are laser printers used for?
Use toner pressed onto a page to produce printed documents. Can print large amounts at a very quick rate.
Popular in schools, businesses and offices
What are the advantages of laser printers?
Very fast at printing documents Toner cartridges last a long time Can handle high volumes of printing Very quiet when printing Very high quality print outs Reliable Cheaper to run than other printers
What are the disadvantages of laser printers?
Environmentally unfriendly - produce ozone, use more power than inkjets
Laser printers are more expensive to buy
Larger in size
What are the uses of Inkjet printers?
Produce high quality hard copies via an ink cartridge.
What are the advantages of inkjet printers?
Out put is high quality cheaper than laser printers smaller than laser printers Do not produce ozone Quiet when printing
What are the disadvantages of inkjet printers?
Slow printing rates
Ink cartridges don’t last long
Can be expensive to run
Printouts can easily smudge
What are the uses of Dot Matrix Printers?
Produces an imprint on the paper by pins being pressed against an ink ribbon.
What are the advantages of Dot Matrix Printers?
Work in environments where other printers might break
Carbon copies can be made
Very cheap
Good for continuous printing
What are the disadvantages of Dot Matrix Printers?
Very noisy
Very slow
Very poor print quality
What are the uses of a Plotter?
Produce hard copies on very large pieces of paper by using a flatbed or a drum, e.g. blue prints
What are the advantages of using a Plotter?
Produce much larger printouts
Print quality is extremely high
Can cut out designs for sign making
What are the disadvantages of using a Plotter?
Very slow
Very expensive
What are the uses of speakers?
Produce sound - e.g listen to music, audio for films
Can be analogue or digital (uses a sound card)
Alters the volume of sounds
What are the advantages of using speakers?
Everyone in the room can hear
Blind people can use the computer
What are the disadvantages of using speakers?
Output can disturb people
High quality speakers can be expensive
What are the uses of Multimedia Projectors?
Project whatever appears on a computer monitor onto a very large screen
What are the advantages of using a multimedia projector?
Many people can see the same presentation
Enhances the viewers experience
What are the disadvantages of using a multimedia projector?
Lower image quality
Expensive to buy
Cooling fans are noisy
