Lecture02 - Overview of Graphics Systems

Lecture02 - Overview of Graphics Systems -...

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Overview of Graphics Systems Overview of Graphics Systems Part I
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Type of Video Display Type of Video Display Cathode-Ray Tubes (CRTs) TV RGB Monitor Oscilloscope Flat-Panel Displays PDA Handphone Laptop Calculator Digital Watch
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CRT CRT Electrons are fired from a filament, focused, accelerated, then deflected to a point on the phosphor coating on the inside of the display screen.
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Random-Scan CRT Random-Scan CRT Electron beam is scanned along each line segment. Capable of displaying continuous lines and very high resolution curves. High-end displays capable of 100k lines per refresh.
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Random-Scan CRT (cont.) Random-Scan CRT (cont.) Advantages: Excellent for line drawings Generally high resolution Disadvantages: Cannot display realistic shaded images Not capable of color Example: Oscilloscopes
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Raster-Scan CRT Raster-Scan CRT Electron beam is scanned from left-to-right, top-to- bottom. Beam retraces to top-left after
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This note was uploaded on 04/05/2010 for the course COMPUTER S 876 taught by Professor Ch during the Spring '10 term at Amirkabir University of Technology.

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Lecture02 - Overview of Graphics Systems -...

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