HW - Computer Graphics Page 1 Display Hardware...

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Computer Graphics Page 1 Display Hardware Printers/Plotters Resolution Dot Size: dpi (dot per inch). 300, 600, 1200, … Dot Distance: Type : Dot-matrix: Printer head has 7x7 ~ 24x24 pins. Pen plotter: Drawing with mechanical pens. 02/23/11 1
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Computer Graphics Page 2 Laser printer : position-charged rotating drum, laser beam hits the parts to be white, discharge the areas, negatively charged powered toner adheres to the positively charged area. Ink-jet printer : sprays cyan, magenta, yellow and black ink onto paper. Thermal-transfer : Colored wax-paper ==> plain paper Thermal-sublimation dye transfer: 256 intensities for each C, M, Y==>16M colors. Near-photographic Camera Film recorder 02/23/11 2
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Computer Graphics Page 3 Display Technologies B/W CRT (Cathode Ray Tube): Cathode ray hits phosphor, which in turn emits light. Phosphor Persistence : time of decay after electronic excitation. Critical Fusion Frequency CFF > 60 frames/second. 02/23/11 3
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Page 4 Bandwidth of a monitor depends on how fast the electron gun can be turned on and off. n pixels / scan line ==> on/off n times per scan line 1000 pixels / line * 1000 line /frame * 60 frames / s 16 nanoseconds / switch. Color CRT 3 guns: RGB Triad phosphor dots: RGB LCD: liquid-crystal display (light weight) raster, grid-like lighting at point (x, y) changes when voltage is applied at the point.
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This note was uploaded on 02/21/2011 for the course CS 575 taught by Professor Dr.sridhar during the Winter '10 term at SUNY Buffalo.

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HW - Computer Graphics Page 1 Display Hardware...

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