📺 Types of Display Technologies

1. CRT (Cathode Ray Tube)

Technology: Uses electron beams to light up phosphor dots on the screen.
Appearance: Bulky and heavy.
Display Quality: Good colors and brightness.
Used In: Old TVs and computer monitors.
Advantages:
- Cheap
- Good viewing angles
Disadvantages:
- Large and heavy
- High power consumption

2. LCD (Liquid Crystal Display)

Technology: Uses liquid crystals between two layers of glass that light up with a backlight.
Appearance: Thin and flat.
Display Quality: Sharp images, less glare.
Used In: Monitors, TVs, calculators, laptops.
Advantages:
- Lightweight
- Low power usage
Disadvantages:
- Limited viewing angles
- Slow refresh rate (in older models)

3. LED (Light Emitting Diode)

Technology: A type of LCD that uses LED backlighting instead of fluorescent.
Appearance: Slimmer and brighter than LCD.
Display Quality: Better brightness and color contrast than standard LCD.
Used In: Modern TVs, monitors, smartphones.
Advantages:
- Energy efficient
- Long life
- Better brightness
Disadvantages:
- Can be more expensive

4. TFT (Thin Film Transistor)

Technology: A type of LCD with transistors that control each pixel for faster response.
Display Quality: Better color, sharper image than standard LCD.
Used In: High-quality monitors, smartphones, laptops.
Advantages:
- Good resolution
- Fast refresh rates
Disadvantages:
- Expensive
- Still limited viewing angles

📝 Summary Table

Display Type	Thickness	Power Use	Quality	Used In
CRT	Bulky	High	Good	Old monitors, TVs
LCD	Slim	Low	Decent	Monitors, calculators
LED	Very slim	Very low	Excellent	TVs, phones, laptops
TFT	Slim	Medium	High	Smartphones, laptops