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Lesson 3A Introduction to Computers Two Kinds of Monitors Cathode ray tube (CRT) Flat-panel display Monitor Categories Based on Color Display Monochrome: One color on a black background Grayscale: Shades of gray on a white or off-white background

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Lesson 3a l.jpg

Lesson 3A

Introduction to Computers


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Two Kinds of Monitors

  • Cathode ray tube (CRT)

  • Flat-panel display


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Monitor Categories Based on Color Display

  • Monochrome: One color on a black background

  • Grayscale: Shades of gray on a white or off-white background

  • Color: From 16 to 16 million unique colors


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Pixel

  • Pixel, short for picture element, is the smallest number of phosphor dots that the electron gun inside the monitor can focus on


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Shadow mask

  • A fine mesh made of metal and fitted to the shape and size of the screen


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Liquid Crystal Display (LCD) Monitor

  • Most common flat-panel monitor


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Viewing Angle

  • The angle from which the display’s image can be viewed clearly


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Two Categories of Liquid Crystal Displays

  • Passive matrix LCD

  • Active matrix LCD


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Other Kinds of Monitors

  • Paper-white display

  • Electroluminescent (ELD) display

  • Plasma/gas plasma display


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Considerations When Monitor Shopping

  • Size

  • Resolution

  • Refresh rate

  • Dot pitch


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Video Controller

  • Intermediary device between the CPU and the monitor

  • Controls how things look on-screen


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Digital Light Projector

  • Connects to a computer and is used to project images on a large screen


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Sound Card

  • Translates digital sounds into the electric current that is sent to the speakers

Click to Enlarge


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Lesson 3A

  • Monitors and Sound Systems


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