introduction to computers lesson 3a. home two kinds of monitors cathode ray tube (crt) flat-panel...

Introduction to Computers

Lesson 3ALesson 3A

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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 backgroundGrayscale: Shades of gray on a white or off-white backgroundColor: 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 LCDActive matrix LCD

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Other Kinds of Monitors

Paper-white displayElectroluminescent (ELD) displayPlasma/gas plasma display

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Considerations When Monitor Shopping

SizeResolutionRefresh rateDot pitch

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Video Controller

Intermediary device between the CPU and the monitorControls 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

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Lesson 3ALesson 3A

Monitors and Sound Monitors and Sound SystemsSystems