1.6 - Output Devices Flashcards
Describe a TFT monitor
- much smaller than CRT
- use liquid crystals to form the image
Describe digital projectors
-larger versions of the monitor output for a larger number of people
Describe interactive whiteboards
- touch-screen sensitive surface so people can use a stylus to interact with it
- they are input and output devices
Describe plasma screens
- often uses as TV’s but also as computer monitors
- they work by illuminating tiny fluorescent lights to make the image
Describe mobile phone screens
Output (viewing the options available to you)
Describe PDA’s (personal digital assistant)
- larger screens than mobiles
- can run application software on them
Describe laser printers
- popular in offices where colour is not needed
- cheap
- can print high quality documents quickly
Describe inkjet printers
- cheaper than lasers
- expensive to run
- slower than lasers
- can print in colour
Describe multi-function printers
- includes built in scanner so can be used as a photocopier
- suitable for home&office use
- use inkjet technology
Describe dot-matrix printers
- very cheap
- black and white
- poor quality
- used where large volume of prints are needed and quality isn’t
Describe plotters
- draw detailed and accurate images
- used to print graphical and technical drawings
- cannot produce full sized colour graphics
Describe external speakers
- plugged into computer and play sounds produced by sound card
- vary in appearance and quality
Describe built-in speakers
- have limited volume and low quality sound
- built into computers for general purpose
Describe headphones
- useful for public situations
- attached to a device by cable
- good for call centres where nouse needs to be kept to a minimum
Describe wireless headphones
- can be used with a phone so user can use phone while driving
- uses Bluetooth technology to eliminate need for cables
Special monitors
- ability to increase font size
- adjust screen resolution
- magnify the display
- adjust colour contrast
Special sound and printer outputs
Printers: Braille
Sound: -audio button for text
-spell check set to audio rather than visuak
What to consider when choosing an output device?
- what kind of image needs to be viewed? E.g Fb page
- where will it be viewed?
- who is going to view the image?
- will it be used to view the internet?
What needs to be considered when choosing a printer?
- what is going to be printed
- how many documents
- what kind of media
- who will use the printer
What is an output device?
A piece of hardware that is used to display processed or stored data
Describe CRT monitors
- based on cathode ray tubes that fire electrons at the screen to make each pixel glow in the correct colour
- they take up a lot of room
- cheap
