Why Your Next TV May Have Mini LEDs
This new backlight technology may help boost brightness and improve contrast in LCD TVs from LG, Samsung, and TCL
Every year, people shopping for a new TV are confronted with new terms and features promising impressive improvements in performance. They donāt always live up to the hype. But this yearās hot technology, the use of Mini LEDs in television backlights, could really make a difference in how some high-end TVs look.
Televisions with backlights made up of Mini LEDs promise to deliver improved brightness, contrast, and black levels. The technology has appeared in a few sets from TCL in the past, but at the CES 2021 trade show, LG, Samsung, and TCL all said theyād be introducing a number of new Mini LED sets.
So why all the fuss about LED backlights?
Most televisions use LCD technology. In these sets, the light comes from the back of the screen, or from the sides. The lights are always on, and pixels open and close to let through the right amount of light for each scene. But in very dark scenes, some light always manages to leak through. This can make black tones look gray, and it can create halos around bright objects that appear against a dark background.
Mini LEDs Improve Local Dimming
Mini LEDs in the backlight take the idea of local dimming much further. By shrinking the size of the LEDs, companies can use more of them packed together into the same area, so these sets can boast thousands of Mini LEDs behind the LCD panel. These are divided into dimmable zones, but because the LEDs are so small, there can be a lot of themāsay a thousand zones, instead of the dozens typically found in even the best LCD sets up until now. And they can be controlled more precisely to help improve contrast and black levels and reduce halos.
And by increasing the dynamic range of the TVāthe difference between the brightest whites and deepest blacksāMini LEDs can also help boost a TVās HDR (high dynamic range) performance. That means youāll be able to see all the detail in a darkly shadowed scene.
Combine all this and Mini LED sets could perform more like OLEDs, while retaining some traditional benefits of LCDs, such as better brightness and a wider choice of brands and screen sizes.
The concept isnāt entirely new. We tested the first Mini LED model, a flagship 8-Series TV from TCL, in 2019. Last year the feature was also rolled out to the companyās 6-Series sets, including the 65Q825 and 65R635.
Consumer Reports has been impressed with the Mini LED models weāve tested, says Claudio Ciacci, who heads TV testing at CR. āWeāve seen Mini LEDs can make an improvement in the local dimming feature, with better control of black levels and dark scenes, and significantly reduced haloing effects.ā In fact, the sets weāve tested have done well in our ratings, with top-notch HDR performance.
Mini LED TVs in 2021
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The three companies selling Mini LED sets in 2021 havenāt talked much about what theyād cost or just when theyād arrive. But they did provide some details.
LG Electronics say it will use Mini LEDs in its top-tier LCD TVs, called QNED sets. LG says its largest-sized QNED TVs could use up to nearly 30,000 tiny LEDs, with up to 2,500 dimming zones. These sets will also have two premium color technologiesāLGās own NanoCell, and quantum dots.
In 2021, Samsungās Mini LED models will fly the Neo QLED banner. These sets include all of Samsungās 2021 8K QLED models (the QN800A, QN850A and QN900A series), plus its top two 4K QLED (the QN85A and QN90A) series.
Samsung says its Mini LED technology uses LEDs that are 40 times smaller than conventional LEDs. Itās also has a new approach, called a quantum matrix, for precisely controlling the LEDs and directing the light more accurately to prevent halos.
Samsung will also offer its first TVs using an even newer technology, called MicroLED technology, in 99- and 110-inch screen sizes.
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As we noted earlier, TCL earns props for being the first TV manufacturer to offer TVs with Mini LED backlights, back in 2019. In 2021, TCL is taking the technology a step further with what it calls OD Zero Mini LED technology. In these sets, thereās no distance between the Mini LED backlight layer and the LCD display layer, which is supposed to help it perform better in areas such as brightness and contrast than its previous Mini LED technology.
According to TCL, the OD Zero sets will boast ātens of thousandsā of Mini LEDs and āthousandsā of dimmable zones. The company hasnāt said just which models will use the OD Zero technology and which might use TCLās more conventional Mini LED technology.
As usual, weāre looking forward to getting many of these new Mini LED TVs into our labs this year for testing to see how much of a benefit theyāll have on performance, and whether any LCD set can supplant the OLED TV models at the top of our ratings.