Smart Led TV: What is QLED?

Despite the possibly confusing acronyms, a QLED screen is a form of TV that is related to the LCD LED screen technology that has dominated the TV industry for years.

QLED aims to get LCD LED panels even closer to reaching TV perfection. We'll explain what they are, their advantages and disadvantages, and if they're worth your money.

QLED is a very difficult term to explain in the TV business, as the meaning has been open to interpretation and change since its introduction. QLED was mentioned as being self-emissive, similar to OLED.

QLED stands for Quantum dot LED TV (forget the d for 'dot') according to the current definition. A QLED TV is a type of LED TV that uses a backlight to shine through a Quantum Dot filter to produce the colors you see on the screen.

What are Quantum Dots?

Quantum dots were mentioned earlier, and they're a big part of how QLED TVs work. They'd just be 'regular' LED TVs if they didn't have them.

Quantum dots are a collection of small dots or Nano crystals of varying sizes that create distinct wavelengths (and thus colors) when exposed to light.

They have a diameter ranging from 1 to 3nm (nanometers) (equal to 50 atoms, that's how little they are). The size of the dot determines the color emitted. Smaller dots are blue, whereas larger ones are red. Quantum Dots can generate more precise colors because each dot is concentrated on one color, and because they're light efficient, they can increase the brightness of a TV's output.

They're also quite stable, so image quality is preserved over time, unlike more organic materials like OLED, which are known to fade (but this takes a long time, too).

How do QLED TVs work?

Of a nutshell, there is a backlight, which is the component in a television that creates the light that the screen need to function. QLED differs from standard LCD LEDs in that it creates blue light instead of white light using blue LEDs.

Blue light is absorbed by the Quantum Dot Nano crystals and radiated to form the red and green colors needed to make an image (a picture is made up of red, green, and blue (RGB) to create what you see). The Quantum Dot filter helps to create what is displayed on the screen by combining blue light with red and green colors created by the Quantum Dot filter.

What are the disadvantages of QLED?

The drawbacks of QLED are similar to those of LCD LED TVs in general. Blooming, or the appearance of rings or halos of light surrounding bright objects, can be seen on QLED TVs whether seen from a front-on position or at an angle, and it can happen even with the most costly QLED TVs.

Due to blooming and light leaking from the backlight, QLED TVs can't achieve the true black and infinite contrast that OLED can. They also can't provide as broad a viewing angle, and the usage of different types of panels (VA, IPS) means that screen quality varies, and a TV's performance consistency varies from one size to the next. Not all QLEDs are created equal, either; the higher the price, the better and more precise the performance.

Because the pixels within the display aren't as sensitive as those on an OLED, motion isn't as stunning. OLED would offer an edge in applications that require greater frame rates, such as gaming, though QLED TVs don't have to cope with the issue of image preservation.

What’s the future for QLED?

The addition of a Mini LED backlight has made TVs smaller in depth (ideal for wall-mounting) as well as more precise in terms of backlighting, minimizing blooming and light leakage onto the screen. QLED continues to develop LCD LED technology. Better black levels are further aided by more precise illumination, and the increased brightness results in images that are strikingly contrast and eye-catching. Samsung's 2022 series improves on this, with Shape Adaptive Light technology minimizing backlight flaws even more.

The adoption of a Mini LED backlight has reduced the depth of TVs (perfect for wall-mounting) while also improving backlighting precision, reducing blooming and light leaking onto the screen. LCD LED technology is still being developed by QLED. More precise illumination aids better black levels, and the enhanced brightness results in images that are remarkably contrast and eye-catching. The 2022 series from Samsung improves on this, with Shape Adaptive Light technology reducing backlight defects even further.

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