In January 2026 Samsung Display announced a QD-OLED television panel it rated at 4,500 nits. A year earlier it had rated the previous generation at 4,000 nits. When FlatpanelsHD actually measured a television built on that 4,000-nit panel, the Samsung S95F, it recorded 2,069 nits on a 1% window. The Sony Bravia 8 II, using a closely related panel, measured 1,689 nits.
Neither company is lying. The panel maker’s figure is what the raw stack can do under laboratory conditions with all three colour components driven flat out; the reviewer’s figure is what a finished, calibrated television actually puts on your wall. That gap, between what a component can do and what a product does, runs through every number on a display spec sheet.
This guide explains how each display technology actually works, what the measurements mean, which trade-offs are real, and which panel type suits which job. No brand recommendations, because those change every year. The physics does not.
The distinction that explains everything else
Every display falls into one of two camps.
Transmissive displays have a light source behind the screen and a layer that blocks light selectively. That is LCD in all its forms. Liquid crystals twist under voltage to let more or less backlight through, and colour filters tint the result. The crystals never block light perfectly, so some always leaks. That leakage is why LCD blacks are grey.
Emissive displays make light at each pixel. OLED, QD-OLED and micro-LED are emissive. A black pixel is simply off, emitting nothing, so contrast is effectively infinite. The cost is that each pixel has to produce its own brightness, which limits how bright a large white area can be and, in the case of organic emitters, means the material ages with use.
Almost every practical difference between panel types traces back to this split.
LCD, LED-backlit and Mini-LED
“LED TV” has always been a marketing term for an LCD with an LED backlight. The picture is made by liquid crystals; the LEDs just supply light. What matters is how that backlight is arranged.
Edge-lit panels put LEDs along the border and spread the light with a diffuser. Cheap, thin, and poor at contrast, because dimming one region dims a whole vertical or horizontal band.
Full-array local dimming puts LEDs behind the panel in a grid of independently controlled zones. More zones means finer control over which parts of the screen are lit.
Mini-LED shrinks each backlight LED to well under a millimetre so thousands can fit behind the panel. Zone counts have grown enormously: FlatpanelsHD’s June 2026 review of the 98-inch TCL X11L counted 20,736 dimming zones.
That sounds like it should solve the contrast problem. It does not, and the arithmetic shows why. A 4K panel has roughly 8.3 million pixels. Divide that by 20,736 zones and each zone still covers about 400 pixels. When a small bright object sits on a dark field, the whole 400-pixel zone must light up. That is blooming, the halo you see around subtitles or stars against a night sky, and the same review found it still visible despite the zone count.
What mini-LED does deliver is brightness. The same TCL set measured around 4,500 nits inherent peak, over 700 nits full-screen, and 88% coverage of the BT.2020 colour space. No OLED comes close on sustained full-screen output, and that matters enormously in a bright room.
Where QLED fits
QLED is an LCD with a quantum dot film in the backlight path. Quantum dots are nanocrystals that emit very pure, narrow-band colour when excited, so they widen the colour gamut. QLED is not an emissive technology and has nothing structurally in common with QD-OLED despite the similar name. A QLED is an LCD.
OLED, and the two kinds you can actually buy
OLED uses organic compounds that emit light when current passes through them. Per-pixel control means true black and no blooming at all. Two different implementations dominate.
WOLED, made primarily by LG Display, uses a white-emitting OLED stack behind red, green, blue and white colour filters. The extra white subpixel boosts brightness efficiently but dilutes saturation at high luminance, and the four-subpixel layout is why fine text can show colour fringing on WOLED monitors.
QD-OLED, made by Samsung Display, takes a different route. As OLED-Info describes it, the panel uses blue OLED emitters and quantum dots that convert some of that blue light into red and green. There is no white subpixel and no colour filter absorbing light, so colour stays saturated as brightness rises. Samsung Display remains the only company producing QD-OLED at volume, at roughly a million panels a year, and its panels hold above 60% of front-facing luminance even at a 60-degree viewing angle.
Measured performance shows the trade-offs. FlatpanelsHD’s review of the Samsung S95F recorded 2,000 to 2,200 nits in calibrated Filmmaker Mode, with Vivid Mode briefly touching 3,600 nits before falling back within seconds as the panel heats. Colour coverage was 84% of Rec.2020, noticeably wider than WOLED.
The same review flagged a real drawback of Samsung’s matte anti-glare coating. It suppresses reflections better than anything else on the market, but it raises the black floor: in a lit room the screen can look grey rather than black, and bright white text picks up a soft halo. Glossy WOLED sets often look more contrasty in the same conditions. This is a genuine preference split, not a defect.
Micro-LED is still not a product you can buy
Micro-LED is the technology that would end the argument: microscopic inorganic LEDs, one per subpixel, emissive like OLED but with the brightness and lifespan of conventional LEDs and no organic material to degrade.
Manufacturing it at consumer prices has defeated everyone so far. Apple cancelled its micro-LED smartwatch display programme with ams-Osram in early 2024 after roughly a decade of development, and shifted its effort toward micro-LED microdisplays for augmented-reality headsets, per MicroLED-Info’s tracking of the programme. Samsung sells modular micro-LED walls at prices measured in six figures. As of late 2026 there is no micro-LED television, monitor, laptop or phone at a normal price, and no credible date for one.
What the specifications actually mean
| Spec | What it measures | What to watch for |
|---|---|---|
| Nits (cd/m²) | Luminance, light per unit area | Peak on a 1–2% window is a marketing figure. Ask for the 10% window and full-screen numbers. |
| Contrast ratio | Brightest white divided by darkest black | Meaningless for OLED (black is zero). “Dynamic contrast” figures are fiction. |
| Colour gamut | Share of a reference space reproduced | sRGB for office work, DCI-P3 for video, BT.2020 as the aspirational target. Nothing covers BT.2020 fully. |
| Refresh rate | Screen updates per second | Real if the source can feed it. A 240 Hz panel showing 60 fps content is a 60 Hz experience. |
| Response time | Pixel transition speed, grey-to-grey | Manufacturer GtG figures use the fastest transition with overdrive. OLED is genuinely sub-millisecond; LCD claims rarely are. |
| VRR | Display refresh matched to source frame rate | Eliminates tearing and stutter. Check the supported range, not just the badge. |
Two certification schemes are worth knowing. VESA’s DisplayHDR tiers name their minimum peak luminance directly: DisplayHDR 400 through 1400 for LCD, with a parallel True Black series for emissive panels that also requires black levels down to 0.0005 cd/m². DisplayHDR 400 is a very low bar and appears on screens that cannot meaningfully do HDR at all.
The second is VESA’s AdaptiveSync Display certification, launched in May 2022. It runs more than 50 tests covering variable refresh rate, grey-to-grey response with overdrive overshoot measured, and flicker, and requires at least a 60–144 Hz VRR range. A companion MediaSync tier targets jitter-free video playback across the standard frame rates from 23.976 to 60 fps. Unlike DisplayHDR’s lowest tier, these are meaningful.
HDR formats, briefly
- HDR10 is the baseline. Ten-bit colour, static metadata, meaning one set of brightness instructions for the entire film. Universal support.
- HDR10+ adds dynamic metadata that adjusts per scene, and it is royalty-free. Backed by Samsung, Panasonic, Hisense and TCL, with support on Prime Video and several other services, according to TechRadar’s format comparison.
- Dolby Vision also uses dynamic metadata, supports up to 12-bit colour, and is licensed rather than free. Backed by LG, Sony and Apple, with Netflix, Disney+ and HBO Max among its users.
- HLG (Hybrid Log-Gamma) is designed for live broadcast, carrying one signal that works on both HDR and standard-dynamic-range sets.
Practical upshot: a set that supports both HDR10+ and Dolby Vision covers everything. A set that supports neither dynamic format still plays all HDR content, just with less per-scene optimisation. Panel quality matters far more than format support.
Burn-in: what the long-run data shows
Burn-in is permanent uneven wear of OLED emitters caused by static content, and the risk is real but widely misunderstood. The most useful evidence is RTINGS’ multi-year accelerated longevity test, whose three-year results were published in December 2025.
The test ran 102 televisions at maximum brightness showing a news channel with a permanent ticker bar, which is close to a worst case. As Notebookcheck summarised, 20 sets failed outright and 24 more partially failed. The worst performers were not OLEDs: LED-backlit sets without local dimming showed defects in nearly 60% of cases, usually burned-out backlight LEDs. Outright OLED failures were extremely rare, though OLEDs did show ghosting from static content driven at maximum brightness.
The honest reading is that at normal brightness with varied content, burn-in is unlikely on a modern OLED, and the panel is more likely to outlive an equivalently priced LCD. The risk rises sharply with permanently static bright elements: a channel logo, a taskbar, a heads-up display, a spreadsheet left open for eight hours a day.
Mitigations built into modern sets include pixel shifting, logo dimming, and automatic compensation cycles that run when the screen is idle. Do not interrupt those cycles by pulling the plug at the wall.
PWM flicker, and why some people get headaches
Most OLED screens dim by switching the emitters on and off very rapidly rather than reducing their drive current, because organic emitters shift colour at low currents. This is pulse-width modulation. The screen looks dimmer because it is off more of the time.
A minority of people are sensitive to this, particularly at low frequencies, and report eye strain, headaches or dizziness. The effect is strongest at low brightness, which is exactly when people use phones in bed.
The industry has begun to respond. FlatpanelsHD reported that the iPhone 17, released in September 2025, added an accessibility option in iOS 26 to disable PWM in favour of DC dimming, a first for Apple. Google raised the Pixel 10’s PWM frequency to 480 Hz but does not let you turn it off. OLED and QD-OLED televisions already use flicker-free DC dimming, so the issue is largely confined to phones, laptops and some monitors.
If you suspect you are sensitive, test before buying. A slow-motion video recording of the screen at low brightness will usually show banding if PWM is present.
Which technology for which job
- Living-room TV, bright room: Mini-LED. Sustained brightness and immunity to burn-in matter more than perfect blacks when sunlight is hitting the screen.
- Home cinema, controlled light: OLED. In a dark room the contrast advantage is decisive and the brightness deficit stops mattering.
- Gaming monitor: QD-OLED or WOLED, for near-instant response and per-pixel contrast. Accept some burn-in risk, keep brightness moderate, and hide the taskbar.
- Productivity monitor, text all day: A good IPS LCD is still the safest choice. Static UI elements for eight hours a day is the pattern OLED handles worst, and OLED subpixel layouts can make small text look fringed.
- Laptop: Depends on use. OLED for media and colour work, IPS or mini-LED for all-day office use and better battery life on bright content.
- Phone: OLED, effectively without exception at the mid-range and above. Check whether the model offers a PWM or flicker-reduction setting if you are sensitive.
Frequently asked questions
Is more nits always better?
No. Peak brightness on a tiny test window says little about how a screen looks. Sustained full-screen brightness, black level and reflection handling matter more in a real room. A 700-nit full-screen figure is worth more than a 4,000-nit peak measured on 1% of the panel.
Will an OLED TV burn in if I game on it?
Probably not, if you keep brightness moderate, vary content, and avoid leaving a static HUD on screen for many hours daily. RTINGS’ accelerated testing suggests modern OLEDs are robust under normal use.
Is QD-OLED better than WOLED?
It has wider colour and holds saturation at high brightness. WOLED often looks more contrasty in a lit room, especially against a matte QD-OLED coating. Neither is universally better; the room decides.
Does refresh rate matter for movies?
Barely. Film is 24 fps and most broadcast is 60 Hz or less. High refresh rates matter for gaming and for the smoothness of user-interface animation, not for cinema.
Is Mini-LED just marketing?
No, the LEDs are genuinely much smaller and the zone counts genuinely much higher. But zone count alone does not eliminate blooming, and dimming algorithm quality varies more between brands than the specification suggests.
How to shop without being sold a number
Decide the room first. A bright living room rewards a mini-LED set; a dark room rewards OLED. Then look for measured numbers from a reviewer who publishes their method, not the figure on the box, and check the 10% window and full-screen brightness rather than the peak.
Treat panel-maker announcements as a ceiling that finished products will not reach; the gap between a 4,000-nit panel claim and a 2,069-nit measured television is typical, not exceptional. Ignore contrast-ratio claims entirely. And remember that the most consequential factor in how a display looks is usually where you put it and how much light falls on it, which costs nothing to get right.
Sources
- FlatpanelsHD — 2026 QD-OLED TV panel reaches 4500 nits, says Samsung Display
- FlatpanelsHD — Samsung S95F (QD-OLED) review
- FlatpanelsHD — TCL X11L (SQD-miniLED) review
- OLED-Info — QD-OLED
- MicroLED-Info — Apple microLED status
- VESA — DisplayHDR
- FlatpanelsHD — VESA’s new AdaptiveSync certification takes aim at FreeSync, G-Sync
- TechRadar — HDR10+ vs Dolby Vision: Which HDR format is best?
- RTINGS — Longevity Burn-In Test: Updates And Results From 100 TVs
- Notebookcheck — OLED TVs beat LCD TVs in 3-year longevity test
- FlatpanelsHD — iPhone 17 adds option to make OLED screen flicker-free
Image credit: Photo: Maurizio Pesce from Milan, Italia — CC BY 2.0 (via Wikimedia Commons)
