Televisions: Panel Types, Screen Size and Working Out the Right Viewing Distance

The panel type matters more than most other numbers on the box

Television listings lead with screen size and resolution, but the panel technology behind the screen affects picture quality, in a normally lit living room, more than most other specifications combined. This guide describes how the main panel types work, without pointing to any specific brand or model, since the same underlying technology is sold under different names by different manufacturers. Once the right type and size are clear, a voucher code or coupon code is a way to pay less for that choice, not a reason to accept a mismatched panel type to fit a promotion.

Standard LED/LCD: the simplest and most common type

A standard LED television uses an LCD layer that blocks or lets through light produced by a separate LED backlight, with a colour filter creating the final image. Backlighting sits either around the edge of the screen or across the back panel, in a smaller number of zones than higher-end alternatives. This is the most affordable and most widely available panel type, and it performs well for general viewing in a bright room, though its ability to produce deep, true black in dark scenes is limited by the backlight always being at least partly on behind the whole panel.

QLED: an LCD panel with a quantum dot layer

QLED televisions are still LCD panels lit by an LED backlight, with an added layer of quantum dot material that filters the backlight to widen the range of colours the screen can reproduce and to push brightness higher. This makes QLED sets well suited to bright rooms with a lot of ambient daylight, since they can be driven brighter than most other panel types without the picture washing out. Because it still relies on a backlight behind an LCD layer, QLED shares standard LED's limitation on true black in dark scenes, though usually to a lesser degree depending on how many backlight zones the specific model uses.

Mini-LED: the same idea, with far more backlight zones

Mini-LED panels are built on the same basic principle as standard LED and QLED sets, an LCD layer lit from behind, but with a much higher number of much smaller LEDs arranged into thousands of individually controlled zones rather than a few dozen or a few hundred. This allows brightness to be adjusted far more precisely across small areas of the screen, narrowing the gap with the next technology, OLED, on contrast and dark-scene detail, while generally still reaching higher peak brightness than an OLED panel.

OLED: every pixel makes its own light

OLED panels do away with a separate backlight altogether. Each individual pixel produces its own light and can be switched off completely, which allows a genuinely black pixel to sit directly next to a bright one with no light bleeding between them. This gives OLED panels an advantage in contrast and in dark, cinematic viewing, particularly in a room with the lights dimmed. OLED panels typically reach lower maximum brightness than Mini-LED or QLED sets, which can matter more in a very bright room during the day.

Matching screen size to viewing distance

A screen that is too small for the room wastes detail; one that is too large for the seating distance can make ordinary content look strained rather than immersive. A commonly used starting point is to sit at roughly one and a half to two and a half times the screen's diagonal size away from it for a comfortable view of most content, adjusted down toward the closer end of that range for higher-resolution content, which holds up to closer viewing without visible pixel structure. Measuring the actual distance from the seating position to the wall where the television will sit, before choosing a size, avoids buying a screen that dominates or disappears in the room it is meant for.

Resolution and refresh rate, briefly

Current televisions are overwhelmingly sold at a resolution offering roughly four times the detail of the previous common standard, and this is now the practical baseline rather than a premium feature. Refresh rate, how many times the image updates per second, matters more for fast motion such as sport or gaming than for general viewing, and a higher refresh rate is of limited use without content or a source device that can actually take advantage of it.

Ports and everyday connections

• The number of HDMI inputs, since a soundbar, a games console and a streaming device can use up ports faster than expected.
• Whether at least one HDMI port supports the newer, higher-bandwidth standard, which matters for higher refresh rate gaming.
• Built-in streaming apps and whether the ones actually used are included natively, avoiding a need for an additional external streaming device.

Comparing listings and checking for a code

Once panel type, size and the ports actually needed are settled, comparing that same configuration across retailers, rather than the first listing found, is worth the extra few minutes, since the same panel technology is priced differently between shops. We check codes across 527 shops in 22 countries several times a day, and current electronics listings can be browsed under Electronics, or under the matching US category, before comparing the final total including any applicable code.