Visual Display unit - PowerPoint PPT Presentation

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Visual Display unit

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It is the basic component of computer.It is used to viewed the output, such as words or video. ... They are flicker and irritate the users' eyes. ... – PowerPoint PPT presentation

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Title: Visual Display unit


1
Visual Display unit
  • 4F Crystal Cheung Kit Ying(6)

2
Real life that we can use VDU
  • Visual display unit (VDU) is output device. It
    looks like television. It is the basic component
    of computer.It is used to viewed the output, such
    as words or video.

3
Type of output
  • Video
  • Picture
  • Words
  • Information

4
Type of data (output)
  • The data from disk , Zip, words which we
    type by keyboard , etc.
  • When the software run the input, it showed on
    monitor , then we can see the data

5
Special Feature
  • The quality of VDU is determined by two
    factors
  • Image resolution
  • Color display
  • The size of VDU
  • Bulky and heavy (CRT monitors)
  • Or
  • Light and thin (LCD monitor)

6
Comparative
CRT monitor LCD monitor
Bulky and heavy Light and thin
Effect or eyes (emit of radiation) No effect (do not emit radiation)
7
Advantage
  • Indicate information
  • Display data
  • Show photo

8
Disadvantage
  • They are flicker and irritate the users eyes.
  • Emit radiation which could harmful to human
    health.

9
Sources of information
  1. www.whatis.com
  2. www.yahoo.com
  3. www.webopedia.com
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