Chap 6 - Chapter 6 Output Output Output Data that has been...

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    Chapter 6 Output
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Output Output  Data that has been processed into useful  information. Video Text Audio Graphics
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Output and Display Devices Output device Any computer  component capable  of conveying  information to a  user Display device An output device  that visually  conveys text,  graphics, and video  information
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Display Devices Monitors Screen Resolution Measures sharpness and clarity As resolution increases images on the screen appear smaller Measured in Dots or pixels CRT Monitors 800 X 600 – up to 800(H) by 600(V) pixels; standard 1280 X 1024 - maximum for most current monitors 2048 X 1536 - maximum for high resolution monitors LCD Monitors Resolution proportional to screen size Dot pitch (CRT monitors) Diagonal distance between each same-color pixel on the display .29 mm or less for curved screen Refresh rate (CRT monitors) Speed at which the monitor redraws the image 72 to 75 hertz or higher
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Display Devices Monitors Cathode Ray Tube (CRT)  Monitors Housed in a plastic or metal  case An electron beam moves back  and forth across the tube,  causing the dots on the front of  the screen to glow Three dots combine to make a  pixel Red, green and blue phosphors  (RGB) Curved and flat screen The  viewable size  of the monitor  is the diagonal measurement  across the screen
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Display Devices Monitors Liquid Crystal Displays (LCD) Uses liquid crystals between two sheets of transparent  thin material Electric current twists the crystals which makes them  become opaque so they can be seen.  These are the  pixels which make the image.   Lightweight, energy efficient and flicker-free Used with handheld, notebook and desktop computers Active-matrix display Thin-film transistor (TFT) display Separate transistors for each color pixel, 3 layers, red green, blue Displays high-quality color that is viewable from all angles Passive-matrix display Dual-scan display Uses fewer transistors and requires less power than an active-matrix  display Color often not as bright and images are best viewed when working  directly in front of the display
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Display Devices Monitors DLP – Digital Light Projection technology Developed by Texas Instruments Competes directly with LCD for use with both monitors and  projectors DLP chip uses thousands of tiny movable mirrors to create  the pixels of the image Many people consider the picture softer than LCD. LCD tends to be more pixelated, lower contrast but higher in 
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Chap 6 - Chapter 6 Output Output Output Data that has been...

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