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Output devices

Output devices. Output devices. Computer internal bit patterns → human. Monitors. Two types of devices: -display -printer. Monitors. Window between user and machine. Monitors. Early computers: -text, -numbers, -tiny graphic symbols. Modern monitors.

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Output devices

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  1. Output devices

  2. Output devices • Computer internal bit patterns→ • human

  3. Monitors • Two types of devices: • -display • -printer

  4. Monitors • Window between user and machine

  5. Monitors • Early computers: -text, -numbers, -tiny graphic symbols

  6. Modern monitors • Images, videos, slides,…

  7. Older computers • Black, white and gray

  8. Control of size and quality: -pixels (dots) • -pixels/inch (dpi) Exmp. 640/480 -colour depth • 8bits = 256diff. colours • 24 bits for true colour image

  9. Updating image per second (hertz) • 60Hertz

  10. Image in RAM memory- VRAM

  11. Monitors • Two types: • CRT (cathode-ray tube) • LCD (liquid crystal display)

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