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The Mini-LED Is the Future of Big Displays

The reigning OLED technology will survive only in small displays

3 min read
A hand placing a colored block with other colored blocks.
Dan Saelinger/Trunk Archive

Asus's ROG Swift PG32UQX is an unexpected revelation. This beefy 32-inch monitor, clad in gaudy plastic and odd, cyclonic swirls, packs a display technology rarely available for computers: Mini-LED. Virtually unknown a few years ago, it is set to become the new default for high-end televisions, computer monitors, and tablets.

The PG32UQX flexes the tech, delivering contrast on par with a quality HDTV along with brilliantly high dynamic range that you have to see to appreciate. It demolishes competing monitors in HDR-compatible games, like Microsoft Flight Simulatorand Forza Horizon 4, where it comes close to photorealism.

Asus isn't alone. Apple turned to Mini-LED for its Pro Display XDR and the newest iPad Pro 12.9. The TV industry, where Mini-LED first gained traction, has launched a full-service buffet of Mini-LED flagships including the LG QNED, Samsung Neo QLED, and TCL OD Zero.

Mini-LED lights a display with hundreds, sometimes thousands, of LEDs sitting directly behind an LCD panel. The LCD itself is little different from that in older displays, but the Mini-LED backlight delivers a serious boost to contrast and dark-scene performance.

The rise of Mini-LED may surprise you if you own an LG CX television, a new iPhone, or any mobile device from Samsung. These have OLED displays with nearly infinite contrast and billions of vivid, accurate colors. They're the benchmark by which other displays have been judged and, according to tech reviewers, found wanting.

Yet OLED's prospects look dim, in the full sense of the word. Asus's PG32UQX has a peak brightness of 1,400 nits (candelas per square meter). That's more than three times what a normal monitor gives. Apple's Pro Display XDR tops 1,600 nits, and Samsung's best Neo QLED televisions can exceed 2,000 nits. Compare that to the Sony A90J OLED television which, in testing by FlatpanelsHD, reached 1,300 nits and sustained it for mere seconds. That's a problem in HDR content that leans on eye-searing visuals.

OLED's burn-in boogieman lurks, too. Companies selling OLED tech swear image retention isn't a problem. Yet when I ask about it directly, I receive a lecture on the device's burn-in reduction features. That's not reassuring and, for many consumers, it won't fly. Just ask Panasonic and Pioneer how burn-in worries helped seal plasma TV's fate.

Then there's price. The Asus PG32UQX retails atUS $2,999, which might leave you aghast. Yet that's a savings over the few OLED monitors released. Dell's discontinued 30-inch OLED was $3,499, while Asus's 22-inch ProArt portable OLED is $3,999.

OLED also skews expensive in televisions, with 65-inch models starting around $1,800 . Mini-LED televisions like the TCL 6-Series start around $900. Flagship LG QNED and Samsung Neo QLED TVs aren't cheap but pack 8K resolution.

There is one challenge facing Mini-LED: thickness. Past LCD screens were edge-lit by LEDs along display bezels, and OLED doesn't need a backlight at all. Mini-LED, however, must place LEDs directly behind the LCD panel, increasing its profile.

But thickness hardly matters. Apple's iPhones have fattened up, but consumers seem as pleased as ever. Apple's MacBook and Dell's XPS lead the laptop market despite profiles that have stalled at about six-tenths of an inch thick. Televisions? Give me a break. No one buys a TV because it's a few millimeters thinner than the competition.

I'm not digging OLED's grave, but I believe that, absent some breakthrough in peak brightness or burn-in, its path forward won't be about pleasing videophiles but about leaning on its unique perks. OLED is great for phones, watches, and VR/AR headsets, where it can squeeze into unusual shapes or even fold. Mini-LED will dominate larger, brighter displays.

We may never get the paper-thin, roll-away displays we once were promised. But, having broiled my retinas with Asus's 1,400-nit Mini-LED monitor, I'm certainly pleased.

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Digging Into the New QD-OLED TVs

Formerly rival technologies have come together in Samsung displays

5 min read
Television screen displaying closeup of crystals

Sony's A95K televisions incorporate Samsung's new QD-OLED display technology.

Sony
Blue
Televisions and computer monitors with QD-OLED displays are now on store shelves. The image quality is—as expected—impressive, with amazing black levels, wide viewing angles, a broad color gamut, and high brightness. The products include:

All these products use display panels manufactured by Samsung but have their own unique display assembly, operating system, and electronics.

I took apart a 55-inch Samsung S95B to learn just how these new displays are put together (destroying it in the process). I found an extremely thin OLED backplane that generates blue light with an equally thin QD color-converting structure that completes the optical stack. I used a UV light source, a microscope, and a spectrometer to learn a lot about how these displays work.

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