Pioneered in consumer TVs since 2019 by TCL, Mini-LED technology has suddenly become a huge deal at the 2021 virtual CES exhibition.
TCL, for starters, has revealed that its 2021 TVs will feature ‘next-generation’ mini LED technology, while Samsung and LG, no less, have both added Mini-LED models to their upcoming ranges.
All of which raises the question of what Mini-LED is, and why it matters for the new sets looking to crash our list of the best TVs.
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As its name suggests, the key to Mini-LED’s appeal to the TV market is that it drastically shrinks the traditional LED modules most modern LCD TVs use to produce their images.
It’s typically proposed that a diode smaller than 0.2mm across can officially be classed as a Mini-LED – though it’s safe to say that TV brands are likely to play pretty fast and loose with this official definition in their real-world products. Especially as it’s difficult to actually check the size of a TV’s diodes without ripping the thing apart.
Why does making LEDs smaller matter? Because the smaller they are, the more of them you can fit behind an LCD TV screen. And the more LEDs you’ve got illuminating a TV’s pictures, the more opportunity you have to deliver brighter and (even more importantly) more contrast-rich images. Two image attributes that are more important than ever now that HDR video content is becoming increasingly common.
The contrast potential of Mini-LED can only be fully realised, though, if Mini-LED arrays are effectively controlled by a TV’s processing system. After all, those hundreds, even thousands, of extra LEDs don’t have a clue how much light they should each be outputting relative to their neighbours at any given moment unless there’s a video processing system and panel driver on hand to tell them.
And given that some conventional full array backlit LED TVs can struggle to handle even just a few dozen separate dimming zones effectively, you can see the potential headaches involved in Mini-LED TVs having to handle thousands.
For an example of the sort of things Mini-LED technology makes possible, Samsung’s high-end 2021 Neo QLED sets replace the bulky lenses that usually accompany standard ‘big’ LEDs with a new ‘micro layer’ of light control that can be used to prevent light from the Mini-LEDs straying into parts of the picture where it’s not supposed to be, further reducing LCD’s traditional issues with backlight clouding and blooming problems.
To sum all this up, it’s not just how many Mini-LEDs you have; it’s also what you do with them.
This combination of Mini-LED factors opens up the potential for plenty of performance differences between various Mini-LED TVs – as well as plenty of potential as the market matures for different standards of Mini-LED TVs to appear at a wide range of price points.
While this will largely be a good thing, it will become increasingly important to remember that Mini-LED TVs will certainly not all be the same.
It’s also important to stress that even a high-end Mini-LED TV with, say, a few thousand lights to its name, still can’t fully compete in local light control terms with the best OLED TVs, or upcoming MicroLED screens (such as the ones Samsung's just announced), where every pixel in the image makes its own unique light.
With this in mind, it’s perhaps not surprising to find LG, which has achieved so much success with its OLED TVs, ranging its new ‘QNED’ Mini-LED TVs above the NanoCell models that were its premium LCD offering in 2020, but below its 2021 OLED sets.
On the other hand, Mini-LED TVs are immune to the screen burn issues that OLED TVs are still (theoretically at least) prone to, and can also run significantly more brightly than OLED screens. And so we see Samsung’s new Mini-LED models occupying the most premium positions in the brand’s 2021 TV range.
It’s possible that Mini-LED TVs will ultimately turn out to be merely a stop gap technology on the road to the domestication of a new generation of fully ‘self emissive’ technologies past OLED, such as MicroLED or QD-OLED. They certainly have become all the rage for 2021, though – and even if they are ultimately superseded by something else in the not too distant future, they may well be destined to one day become the ‘new normal’ for the mainstream LCD TV world, giving a big picture upgrade but with the potential to be affordable pretty quickly.