This ability for higher brightness coupled with HDR and WCG (Wide Colour Gamut) technology allows a QLED TV to have a better contrast ratio (the difference between the brightest and darkest part in an image) and produce a varied, vivid and dynamic looking colours, resulting in more life-like picture quality.Īnd those colours will be very accurate as the colours the dots emitted are very ‘pure’ because the light produced by each quantum dot is so closely related to their size, so the colours can, in effect, be precisely tuned to produce the colours need. There are a number of advantages in using Quantum Dot filters in an LCD TV, and perhaps the main one is the ability to produce a much higher luminance level than you would be able to get from, say, OLED or traditional LCD display. The combination of the blue light along with the red and green colours created by the Quantum Dot filter helps create what’s seen on the screen. The use of blue light takes care of the colour blue required to make an image (a picture is made up of red, green and blue (RGB) to create what you see), and it is absorbed by the Quantum Dot nanocrystals and emitted to created red and green colours. Where QLED differs from traditional LCD LEDs is that it uses blue LEDs to create a blue light instead of white light. In short, there is a backlight, and in a TV, this is the element that produces the light the screen needs to function. They’re also very stable, so the quality of an image is maintained over a long time, unlike a more organic material such as OLED, which is known to degrade (but this takes a long time, too). As each dot is focused on one colour, they can produce more precise colours, and as they’re light efficient, using Quantum Dots allows for greater brightness in terms of a TV’s output. Smaller dots appear as blue, larger ones in red. The colour emitted correlates to the size of the dot. They range between 1 to 3nm (nanometers) in diameter (equivalent to 50 atoms, that’s how small there are). Quantum Dots are an array of tiny dots or nanocrystals at slightly different sizes that produce different wavelengths (and therefore colours) when light is applied to them. Without them, they’d simply be ‘normal’ LED TVs. We mentioned Quantum Dots above, and there are intrinsic to how QLED TVs work. Trust us, there have been a few times when Samsung has corrected us for our faux pas. Through marketing and branding it’s become seen as a Samsung technology, but Hisense, TCL and Vizio make QLED TVs, too.Īnd it is pronounced as Q-L-E-D, not Q-LED. Samsung is the company most associated with QLED, but they didn’t come up with the idea, which has been around since the 1980s. A QLED is a variation on a LED TV, with a backlight shining into a Quantum Dot filter to produce the colours that you see on the screen. The current definition is that QLED stands for Quantum dot LED TV (just forget the d for ‘dot’). There was mention of QLED being self-emissive – like OLED – but Samsung rebranded that definition early on in its life. Unsurprisingly for the TV world, QLED is a surprisingly tricky term to explain as the definition has been open to interpretation and change since it arrived on the scene. We’ll explain what they are, their positives and negatives and determine whether they’re worth spending your cash on.īut first, what is a QLED TV? What is QLED? QLED looks to take LCD LED displays further down the road of achieving TV brilliance. If you’ve bought a TV in recent years, you have searched the isle of your nearest electrical store and seen the presence of QLED TV.Ī QLED screen is a type of TV, different from OLED despite the potentially confusing acronyms, and a relation of the LCD LED screen technology that has dominated the TV market for years.
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