Graphics Systems - Department of Aerospace Engineering

142 Pages·2007·2.81 MB·English

Graphics Systems
Dr. S.M. Malaek
Assistant: M. Younesi
Overview
Display Hardware
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How are images displayed?
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Overview (Display Devices)
Raster Scan Displays
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Random Scan Displays
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Color CRT Monirors
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Direct View Storage Tube
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Flat panel Displays
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Three Dimensional Viewing Devices
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Stereoscopic and Virtual Reality
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System
Overview (Display Devices)
The display systems are
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often referred to as Video
Monitor or Video Display
Unit (VDU).
Display Hardware
Video Display Devices
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The primary output device in
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a graphics system is a
monitor.
Video Monitor
Cathode Ray Tube
(CRT)
1. Electron Guns
2. Electron Beams
3. Focusing Coils
4. Deflection Coils
5. Anode Connection
6. Shadow Mask
7. Phosphor layer
8. Close-up of the
phosphor coated
inner side of the
screen
Cathode Ray Tube (CRT)
Refresh CRT
Light emitted by the Phosphor
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fades very rapidly.
One way to keep
Refresh CRT:
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the phosphor glowing is to
redraw the picture repeatedly by
quickly directing the electron
beam back over the same points.
Electron Gun