Visual Display unit

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Visual Display unit

• 4F Crystal Cheung Kit Ying(6)

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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.

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Type of output

• Video
• Picture
• Words
• Information

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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

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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)

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Comparative
CRT monitor LCD monitor
Bulky and heavy Light and thin
Effect or eyes (emit of radiation) No effect (do not emit radiation)
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Advantage

• Indicate information
• Display data
• Show photo

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Disadvantage

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

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Sources of information

1. www.whatis.com
2. www.yahoo.com
3. www.webopedia.com