Skip to main content

WHAT IS LED, OLED, AND QLED?

 ðŸ’¡ WHAT IS LED, OLED, AND QLED?

These are different display technologies used in TVs, monitors, and screens. All produce beautiful images — but they work very differently behind the scenes.


🖥️ 1. LED (Light Emitting Diode)

How it works:

  • It’s actually a type of LCD (Liquid Crystal Display).

  • Uses LEDs as a backlight behind an LCD screen.

  • The crystals block or allow light to pass through to form images.

📌 Key Traits:

  • Bright and energy efficient

  • Affordable and common

  • Not true blacks (backlight always leaks a bit)

  • Colors depend on filters, not true emitters


🌈 2. OLED (Organic Light Emitting Diode)

How it works:

  • Each pixel produces its own light — no backlight needed.

  • Made from organic materials that glow when electricity passes through.

📌 Key Traits:

  • Perfect blacks (pixels turn off completely)

  • Super thin and flexible screens possible

  • Vibrant colors, high contrast

  • Expensive and can burn-in (image retention)


🌟 3. QLED (Quantum-dot LED) — (used by Samsung and others)

How it works:

  • It's still a LED-backlit LCD, but with an added quantum dot layer.

  • Quantum dots are tiny particles that glow precisely when hit by light.

📌 Key Traits:

  • Brighter and more color-accurate than normal LED

  • Still uses a backlight (unlike OLED)

  • Great for bright rooms

  • Longer lifespan than OLED