ICT- INFO 1- OUTPUT

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  • Created by: luiop100
  • Created on: 23-05-16 11:09
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  • Output
    • Information Types
      • visual
      • audible
    • Visual Output
      • Screens and monitors
        • The user can see what's happening
        • See a moving image
        • Resolution determines image quality
        • Complex graphics require a high resolution
        • resolution is measured in pixels
        • CRT monitor
          • cathode ray tubes
          • sharp and clear display at a low cost
        • TFT monitor
          • thin film transistor
          • takes up little space
      • Large displays
        • When computer based images need to be shown to lots of people
        • Digital projector
          • portable and can be mounted
          • Larger version than on the screen
        • Interactive whiteboard
          • Can be written on using a stylus
          • Are both input and output devices
        • Plasma screen
          • Used as televisions
          • illuminates tiny fluorescent lights to create an image
      • Small displays
        • Mobile phone screens
          • need internet access and a screen capable of refreshing
          • Need to be able to watch TV via the phone
        • PDAS
          • larger than a mobiles
          • have touchscreens an a virtual keyboard
      • Printers
        • Laser printer
          • Full page at a time
          • Used in offices, for clear text and diagrams
          • Uses toner
        • Inkjet printer
          • Cheaper than lasers
          • tri-coloured ink
          • smudges easily
        • Multi-function printer
          • Built in scanner
          • Simple photocopier
          • Can be a fax machine
          • Usually uses inkjet rather than lasers
        • Dot-matrix printer
          • Used to print on multi-part stationary
          • quality is less important than quantity
          • low quality fades over time
          • Used for reciepts
        • Plotter
          • Uses pens drawing along paper to create detailed images
          • expensive but good for graphs
        • Photo printing
          • Portable
          • Printing via SD card or bluetooth
          • Quality of ink is important, prof. printing is cheaper
        • Professional printer
          • Cost effective
          • Saves staff and produces excellent results
    • Audible Output
      • Speakers
        • External speakers plugged into the computer, and sounds produced by the sound card
        • devices have inbuilt speakers but have limited volumes
        • Wireless headsets are more convinient
        • Vary in size, quality, appearance and volume levels
        • Headphones for public use but can cause hearing damage
    • Special Purpose Output
      • Increase font size
      • Adjusting screen resolution
      • Magnifying display
      • Adjusting colour contrasts
      • Read as it is typed
      • Keywords to describe graphics
      • availability of braille printers
    • Choosing an output device
      • monitor is almost always required
      • TFT is the most practical
      • Consider Portability
      • Larger screens are more comfortable
      • Satellite navigation requires a particular screen size
      • More people suit a projector
      • Web designers dictate what output device they are vie?ed on
      • Laser printer have low running cost
      • Coloured printing produces high quality photos but smudge
      • laser prints high volumes
      • Specialised printers
      • Shared printers need to be networked wirelessly
  • Professional printer
    • Cost effective
    • Saves staff and produces excellent results

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