Image and video displays :
1. Visual Display Unit (VDU):
- Rapid operation: Works quickly.
- Reasonable size: Not too big or small.
- Reasonable resolution: Provides clear images.
- Quiet operation: Doesn’t make much noise.
- No paper waste: Doesn’t use paper.
- Relatively low cost: Affordable.
- Reliability: Works consistently.
- Highlighting: Can emphasize certain things.
- Graphics and animation: Can show pictures and moving images.
2. Monochrome vs. Color Displays:
- Monochrome displays: Basic and cheaper, suitable for some uses.
- Color displays: More attractive and effective, good for video games, simulations, CAD, etc.
3. Display Technologies:
- CRT (Cathode Ray Tube):
- A glass tube with electrons creating a picture on a phosphor-coated screen.
- Plasma Panel (Gas Discharge Display):
- Uses gases, like neon, between glass plates with vertical and horizontal ribbons to create images.
- Liquid Crystal Displays (LCDs):
- Non-emissive, uses liquid crystals and polarized light to create images.
- Flat Panel Display:
- Reduces the depth of CRT displays, uses pairs of electrodes to create images.