Display Devices in Computer Graphics

The most prominent part of a personal computer is the display system that is responsible for graphics display. The display system may be attached to a PC to display character, picture, and video output. The display systems are often referred to as Video Display Unit (VDU) or Monitor.

Cathode Ray Tube (CRT):

A CRT is like as a big vacuum glass bottle. It contains three electron guns that squirt out a focused beam of electrons, deflection electrostatic which deflects the beams both up and down and side-wise and a phosphor-coated screen upon which these beams.
The primary component is an electron gun is a cathode (negatively charged) encapsulated by a metal cylinder that is called the Control grid. A heating element inside the cathode causes the cathode to be heated up as current is passed. As a result, electrons ‘boil-off’ from the hot cathode surface. These electrons are accelerated towards the CRT screen by a high positive voltage applied near the screen that is called Anode.


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Computer Graphics
    1. Display Devices in Graphics
    2. Raster Scan Display
    3. Random Scan Display
    4. Input Devices
    5. Output Devices
    6. Types of Printer
    7. Pixel and Resolution in Graphics
    8. Aspect Ratio
    9. Refresh Rate and Interlacing
    10. Digital Differential Analyzer (DDA) Algorithm
    11. Bresenham’s Line Algorithm
    12. Bresenham’s Circle Drawing Algorithm
    13. Difference Between DDA and Bresenham’s Line Algorithm
    14. MidPoint Circle Drawing Algorithm
    15. Anti-Aliasing in Graphics