OLED, Mini-LED and QLED: What Each Screen Type Actually Does

Panel type decides the three things you notice about a screen every day: how black black looks in a dark room, how legible the screen stays in sunlight, and how the panel ages. The names on spec sheets - OLED, AMOLED, LTPO, IPS LCD, Mini-LED, QLED - describe three different technologies plus a marketing layer on top. This guide separates them.

Three families, one row on the sheet

Every display belongs to one of three families:

• Self-emissive (OLED and its variants). Each pixel produces its own light and can switch off completely. Turning pixels off is what produces true black, per-pixel contrast control and near-infinite contrast ratio in a dark room.
• Backlit LCD (IPS and friends). One backlight sits behind the liquid crystal layer. The crystals gate light rather than produce it, so "off" pixels still let some backlight through - blacks read as dark grey in a dark room.
• Zoned backlight (Mini-LED). Still an LCD, but the single backlight is replaced by thousands of small LEDs grouped into hundreds or thousands of independently dimmed zones. Closing the gap toward OLED contrast while keeping LCD brightness is the whole point.

Quantum dots are a fourth concept that sits on top of two of these: a film of nanocrystals that converts backlight into purer, more saturated colour. On an LCD it is sold as QLED; on an OLED panel it is sold as QD-OLED. Quantum dots improve colour volume and brightness - they are not a contrast technology, so a "QLED" badge tells you nothing about black levels.

What each family does well, and where it fails

**OLED** wins on contrast, response speed and thinness. Pixels switch in microseconds, which is why motion looks clean and why the panels can be folded. The costs are real: full-screen brightness is harder to sustain than peak brightness, repeated static elements wear the organic material unevenly (burn-in), and the panels cost more to replace.

**LCD** is the opposite trade. No burn-in risk, strong full-screen brightness, lower cost, uniform appearance. It loses on black level, contrast in dim rooms and viewing-angle glow. For a bright office or a kid's tablet, these are not weaknesses you will notice.

**Mini-LED** sits between them. With enough zones it gets close to OLED contrast while staying brighter and immune to burn-in. The failure mode is blooming - a halo around a bright object on a dark background - and the zone count is the specification that decides how visible that halo is. It is also thicker and warmer than OLED.

What our database shows for phones

Every phone we track records its panel type: across the 47 phones in our database the OLED-family labels dominate - AMOLED (13), OLED (12), LTPO AMOLED (5), LTPO OLED (4), Super AMOLED (4), plus the pOLED, Flexible AMOLED and Dynamic AMOLED variants - while only two phones carry LCD panels (one LCD, one IPS LCD).

Peak brightness across those same phones runs from 600 nits to 4,500 nits with a median of 2,600, and 40 of 47 list HDR support. Read those numbers carefully: peak brightness is measured on a small window of the panel for a short period, not across the whole screen while you are reading outdoors. Sustained full-screen brightness is the figure that decides sunlight legibility, and it is rarely published.

Mini-LED and QLED do not appear on phone spec sheets at all - they belong to televisions, monitors and laptops, where the backlight zone count and the quantum-dot film are the specifications to compare.

Marketing names that do not change the physics

• AMOLED, Super AMOLED, Dynamic AMOLED, pOLED are all OLED variants. The prefixes describe the manufacturer's stack and branding, not a different underlying technology.
• LTPO describes the thin-film transistor backplane, which allows the panel to run at widely variable refresh rates. It is a battery feature, not a picture-quality badge.
• HDR10+, Dolby Vision, HDR10 are format certifications. They say what metadata the panel can accept, not how bright or how accurate it will actually render.
• "10-bit", "1 billion colours" describe the panel's colour depth capability. Content, calibration and ambient light decide whether you see the difference.

Choosing by where and how you watch

• Dark-room movies and gaming: OLED. The contrast advantage is exactly what the environment rewards.
• Bright rooms, sports, shared screens: Mini-LED or a good IPS LCD. Sustained brightness matters more than black level when the room is lit.
• Static interfaces, spreadsheets, status dashboards: LCD, or OLED if you enable pixel shift and avoid leaving maximised bright elements for hours.
• Fast gaming: OLED for response time and variable refresh; Mini-LED if the game is bright and you prefer no burn-in risk. Response time and refresh rate matter here more than panel family.

Burn-in: what it actually is

Burn-in is cumulative, unequal wear across the panel. Pixels displaying the same bright, static element for thousands of hours age faster than their neighbours, leaving a faint ghost of that element even when the content changes. It is a gradual characteristic of self-emissive panels, not a sudden defect.

Mitigations are built into modern phones: pixel shifting moves the image by a pixel or two periodically, auto-brightness limits peak output on static screens, and dark themes reduce total light output. The practical advice is ordinary: vary what is on screen, avoid leaving the same bright widget at maximum brightness for hours, and check whether the warranty covers burn-in before you buy.

Questions worth asking before you buy

• Is the published brightness a peak figure or a sustained full-screen figure?
• Does the panel use DC dimming or high-frequency PWM, and do you notice flicker at low brightness?
• On a Mini-LED set, how many zones does it have - and what does blooming look like in a dark room demo?
• Does the manufacturer's warranty cover burn-in?
• Will you use this screen mostly in a dark room or a bright one? That single answer eliminates half the options.

For phones, our Spec Comparison puts panel type, refresh rate, peak brightness and HDR support side by side for any two models in the database - the four rows that decide most of what you will actually see.