QLED

Learn the Difference Between OLED and QLED

Sometimes it can be confusing when acronyms are nearly identical. It would be in consumers' best interest to learn the difference between OLED and QLED before browsing for new TVs. OLED stands for "organic light-emitting diode" while QLED stands for "Quantum Dot LED" (according to Samsung). Quantum dots are extremely small semiconductors that backlight a Liquid Crystal Display. Many people think "QLED" was a label intentionally chosen to look similar to "OLED", despite not being the same technology.

QLED versus OLED, and What is Microlithography?

LG B8 65" OLED - OLED65B8PUA

Episode 1603

Tom from Harrisburg, PA

Tom purchased a new OLED TV and it brought him to do research into the average diameter of an atomic nucleus and cutting circuit lines. Tom wants to know how production facilities are able to cut circuit lines so small and address the wiring grid within so that they don't overlap one another. Leo tells Tom that the process is called Microlithography, which he explains is similar to the idea of silk screening: Painters paint on a screen of silk and then apply ink to it, and the ink goes through the part of the silk that isn't painted. It's a fascinating process.

Scott Wilkinson on Home Theater

Scott Wilkinson

Episode 1537

What is the difference between OLED and QLED? Scott says that OLED is Organic Light Emitting Diodes, and is based on organic chemistry, or carbon. That's how it makes light. QLED, on the other hand, stands for Quantum Dot Light Emitting Diode, and it's just a higher end LCD TV. The light source behind the panel is using quantum dots, including LEDs to illuminate the image. They are completely different technologies. But the "QLED" term confuses people, and they may think they're getting a special OLED screen, but they aren't.

What TV should I buy?

Samsung QLED TV

Episode 1509

Michael from Miami, FL

Michael is looking to get a TV and wants to know if he should get 1080p or 4K. Leo says he should definitely get 4K moving forward. But even more importantly, he should get a TV with HDR. It has a much nicer look. Leo's choice is the LG B6 OLED. It comes down to budget though. Michael wants a TV that has no bezels. He wants to hang it on the wall like a painting preferrably an 80" model. Leo says that Vizio has a nice one.

Does Samsung's QLED TVs use OLED technology?

Samsung QLED TV

Episode 1448

David from California

David is seeing "banding" when he's watching his HDTV. What is that? Leo says that banding usually indicates compression and comes from the source material. If he wants to test it, he should hook up his TV to a Blu-Ray player and play a Blu-ray DVD. He won't see any banding because there's no compression there. But when he watches on satellite or streaming Netflix, he'll see it because the signal is compressed.

Scott Wilkinson on Home Theater

Scott Wilkinson

Episode 1354

Scott is back from CES and he put 25.5 miles on his feet, and that's just in the Central Hall! He saw the latest QLED system, which creates more white light to pass through the LCD panel and get color from filters. Quantum dots, however, aren't really LEDs, they're just really small dots of a material that can then absorb light and radiate another color. Scott says that OLED TV prices have remained consistent, while the quality of the screens has improved. OLED is still the best screen you can get.