OLED, QLED and Mini LED: how the panel types actually differ

Only one of those three names describes a panel. OLED pixels make their own light, as LG says on its own explainer: "With OLED, there's no backlight." QLED and Mini LED are parts bolted onto a conventional LCD, and Samsung's buying guide files both under lighting: Mini LED is "an advanced backlighting display technology," while "A QLED TV uses Quantum Dot layers that set it apart from standard LED TVs."

The test is whether two of them coexist in one product. A set can be QLED and Mini LED at once, and Samsung sells that as Neo QLED, "using both Mini LEDs as well as Quantum Dot Technology." Nothing is both OLED and Mini LED. A set either has a backlight or it does not.

The split that matters

An LCD panel is a shutter. The liquid crystal blocks or passes light from behind it, so every improvement branded onto an LCD set is either a better light source or a better filter in that stack. An OLED panel skips the stack: each subpixel emits and switches off completely, which is where the black level comes from.

What QLED actually adds

Samsung describes quantum dots as "ultra-fine semiconductor materials of nanoscale size" whose particle size sets the color they produce, larger for red and smaller for blue. Digital Trends spells out the arrangement inside a TV: QLED sets "swap out white LEDs for blue LEDs and then layer red- and green-tuned quantum dots on top," and those dots "absorb the blue light from the LEDs and convert it into red and green light." Liquid crystal in front of it still forms the image.

Samsung rebranded its TVs as QLED at CES 2017 and formed a QLED Alliance with Hisense and TCL in April 2017 to market quantum dot sets under a shared term. That is an agreement between LCD makers, not a standards-body designation, so the badge tells you nothing about contrast, dimming or brightness. A QLED set with no local dimming is a plain LED LCD with better color. Check the local dimming line before you pay for the letter Q.

Mini LED is a backlight change

Samsung's definition rewards close reading: Mini LED "uses tiny LEDs, smaller than standard ones, for more precise backlight control through local dimming zones." Every noun there is about the light source. Samsung publishes no chip dimension there and explainer figures disagree, but the direction is not in dispute. Smaller packages mean more of them behind the same panel, and a backlight built from more elements can be cut into more independently dimmable areas. The liquid crystal in front is unchanged, which is why Neo QLED can be both things at once.

The naming trap: Mini LED, Micro LED, Micro RGB

Micro LED is the genuinely different one. Samsung's page for it says the display uses "tiny LEDs that are substantially smaller than conventional LEDs" and is "powered without backlighting or color filters," with "individually controlled pixels." No backlight and no color filter puts it on the OLED side of the split despite the shared prefix.

Samsung keeps the two apart, filing Micro RGB and MICRO LED as separate categories on its own site. Micro RGB is the LCD one: "local dimming technology for color and brightness, enabled by a micro-sized RGB backlight." In the R95H and R85H the red, green and blue backlight elements are driven individually, so the backlight shapes color and not only brightness. The 65-inch R95H lists at $3,199.99 on Samsung's US store as a 2026 model.

A reliable giveaway: if a spec sheet quotes a dimming zone count, the display has a backlight. An emissive panel has no zones: every pixel dims itself.

WOLED and QD-OLED are the two real OLED panels

Both are emissive; the difference is how they generate color.

LG Display uses a white-subpixel color-filter architecture; the resulting white, red, green and blue arrangement "is commonly referred to as WRGB OLED." White light is made once, then filtered. LG Display also sells those panels to other brands, and as of 2022 it made the OLED panels in Sony's OLED TVs.

Samsung Display's QD-OLED drops the filter. Its technical page says "QD-OLED uses blue, which has the strongest light energy, as a light source, so it can achieve relatively bright luminance," and that "the red and green QD that produces color by receiving the blue light also produces color light with high color purity."

Quantum dots therefore appear in both QLED and QD-OLED, converting a backlight in one and an emitter in the other.

Dimming zone counts are not a comparable spec

Local dimming exists only on backlit sets. LG's explainer sets out three arrangements. Edge-lit sets "can typically only dim large sections of the picture, not the pin-point dimming you'd get with Full Array." Full array sets spread LEDs "throughout the back of the television," so dimming is "finer, more targeted, and produces deeper, darker, richer images." Direct-lit sets have LEDs behind the whole screen but "don't use local dimming." Direct-lit catches buyers, because the name sounds like full array.

Zone counts vary between brands and with screen size inside one model name, so a number from a 75-inch review does not describe the 55-inch on your wall. Pull it from the spec sheet for your exact SKU or treat it as unknown.

That does not remove the structural limit. One zone lights a patch of pixels rather than a single pixel, so halo around bright objects on dark backgrounds is inherent to LCD at any zone count. More zones shrink it. They do not remove it.

Peak brightness and full-field brightness are different numbers

VESA's DisplayHDR criteria, CTS version 1.2 released May 7, 2024, test both figures separately at every tier, because a small bright patch and a full white screen are not the same demand on a display.

VESA's reasoning for testing twice: an uncertified display claiming HDR-1000 "may only be able to achieve 1000 nits for a much shorter time... or it may entirely fail to achieve 1000 nits in a full screen test."

True Black 1400, announced July 8, 2026 for what VESA calls "tandem OLED architectures," is the useful row. It accepts a 2:1 gap between peak and full-screen sustained on a current OLED while demanding a black level 40 times tighter than DisplayHDR 1400 asks of an LCD. That line is the whole trade.

The OLED gap comes from total panel power: output per pixel is pulled back as more of the screen lights up, a behavior usually called the automatic brightness limiter. A backlit set has no equivalent constraint, because the light-emitting layer and the image-forming layer are physically separate; its ceiling is heat and power delivery to the LED array. Mini LED sets win full-screen sustained comparisons for that reason.

A nits figure quoted without a window size is not a specification. Ask what percentage window it was measured on before comparing two of them.

Burn-in, as the current evidence has it

RTINGS' Longevity Burn-In Test is the largest running sample: 102 televisions over about three years, with results reported in late December 2025. Twenty sets died completely and 24 suffered some form of damage, and most were still working properly through the first 10,000 hours. OLED came out as the most reliable category overall, edge-lit LCD the least, with the light guide path a common failure point.

Burn-in did appear on OLEDs there, under deliberately static high-brightness content. RTINGS' position, as quoted in that reporting, is that the run was "designed to torture test" the sets, and that "under normal circumstances, these TVs wouldn't have experienced any burn-in."

The "OLED burns in after two years" framing traces to an October 2018 RTINGS test that ran "a five-hour 'on' period and one-hour 'off' period during a cycle that was repeated four times per day" at maximum brightness, with visible burn-in reported around 4,000 hours on gaming and news content carrying static logos. That describes a protocol, not ownership.

Two effects also get conflated. Burn-in is localized image retention from static content; overall luminance decay across the panel is separate aging with a different cause.

So the remaining risk is narrow: fixed elements at high brightness for most of the waking day, a broadcast ticker or a static HUD. For that, buy on warranty terms. ASUS lists OLED monitor coverage per model in a support FAQ last updated October 7, 2024: three years including panel burn-in on the PG32UCDM, two on older models such as the PA32DC and PG42UQ, 36 months by default on anything unlisted. It also warns that some boxes still print two years on units actually covered for three. Television coverage is far less consistent, so pull the warranty document for your exact model and region.

Buy Mini LED for a daylit room and for sports or news, because sustained full-screen brightness is the one axis where backlight architecture genuinely wins. Buy OLED for a dark room and film. LG's 2026 OLED evo G6 launched at $2,499 for 55 inches, $3,399 for 65 and $4,499 for 77, per LG's March 5, 2026 US pricing announcement. The 65-inch sits about $200 above Samsung's 65-inch Micro RGB at $3,199.99. At that spread the room decides it, not the badge.