Key Facts: TV & Display Technology
This page is PanelPicks' maintained fact reference: the core factual claims made across our guides, restated as standalone sentences grouped by theme, each linked to the page that elaborates it. Every fact was verified against our published guides as of July 22, 2026.
Panel architecture
All displays are either transmissive (a backlight plus per-pixel shutters, e.g. LCD/LED/QLED) or emissive (each pixel makes its own light, e.g. OLED/QD-OLED/MicroLED), and transmissive panels cannot produce true black because their shutters leak (see how TV panels actually work). An LCD stack loses roughly half its light at the first polariser alone, and colour filters work by absorbing the wavelengths they do not pass, which is why LCD panels require powerful backlights. Native LCD contrast ratios are typically in the low thousands to one; OLED contrast is effectively infinite because an off pixel emits nothing. LCD viewing-angle shift is caused by the liquid crystal layer — off-axis light takes a different path length, so its polarisation is rotated by the wrong amount — while OLED has no such layer. QLED is an LCD television: quantum dots improve the backlight's colour spectrum, but the transmissive architecture and its limitations remain (see OLED vs QLED).
Quantum dots
A quantum dot is a semiconductor crystal a few nanometres across whose emission colour is set by its physical size via quantum confinement: roughly 2nm emits blue and roughly 6-7nm emits red. Quantum dots emit in a very narrow spectral band — tens of nanometres wide — compared with broad-spectrum phosphors, which is what produces their wider colour gamut (both explained in how TV panels work).
OLED technologies
WOLED (LG Display) emits white light per pixel and carves it into colours with filters, plus a white subpixel that raises brightness but dilutes saturated colour as brightness increases. QD-OLED (Samsung Display) uses a blue OLED emitter and converts blue into red and green with quantum dots; conversion wastes far less light than filtering and there is no white subpixel, so QD-OLED holds saturation at high brightness (compared in QD-OLED vs WOLED). QD-OLED lacks the polariser layer that helps WOLED reject ambient light, so its blacks can appear slightly raised in bright rooms. OLED televisions use an Automatic Brightness Limiter: full-screen bright content is dimmed to stay within power and thermal limits, while small highlights run far brighter. A micro lens array recovers light otherwise trapped by total internal reflection, and a tandem stack layers multiple emissive units so each carries less load (see Primary RGB Tandem and QD-OLED Penta Tandem). LG Display's WOLED is licensed to other brands including Sony; Samsung Display's QD-OLED is a separate, competing OLED technology (see Samsung vs LG).
Burn-in and emerging technologies
OLED burn-in is caused by cumulative, uneven degradation of organic emitters: localised static content ages one region faster, creating a visible ghost, and blue emitters degrade fastest because blue photons carry the most energy (see how real the burn-in risk is). QLED and mini-LED carry no burn-in risk at all. Blue emitter efficiency and lifetime is the central unsolved engineering problem across every emissive display technology, including QDEL. QDEL (also called NanoLED or EL-QD) drives quantum dots directly by electricity with no OLED layer; as of 2026 it remains prototype-stage, with credible industry estimates placing QDEL televisions around 2029. MicroLED uses microscopic inorganic LEDs per subpixel — emissive, very bright, immune to organic degradation — and its barrier is manufacturing cost. Mini-LED backlights group thousands of LEDs into hundreds or thousands of dimming zones, but a 4K panel has over 8 million pixels, so thousands of pixels share each zone — that size mismatch causes blooming halos (see mini-LED vs OLED).
Connectivity and gaming
HDMI 2.1 carries up to 48Gbps of bandwidth, required for uncompressed 4K/120Hz plus VRR, while HDMI 2.0 caps out around 4K/60Hz with no VRR support. PS5 and Xbox Series X require a native 120Hz panel, VRR, and ALLM, in addition to HDMI 2.1, to deliver their full gaming feature set. Many TVs only wire full HDMI 2.1 bandwidth to one or two of their HDMI ports, so check the specific port before assuming full bandwidth (all covered in the gaming TV guide).
Buying and setup
If ambient light cannot be controlled, sustained brightness matters most and mini-LED generally wins; if light can be controlled, per-pixel emission wins because an off pixel emits nothing (see the use-case buying guide). A common 4K viewing-distance guideline is roughly 1 to 1.5 times the screen's diagonal size — a 65-inch TV suits roughly 5.5 to 8 feet — and a typical wall-mount height for a standard couch is roughly 42-48 inches from the floor to the centre of the screen (see the TV setup guide).
How these facts are maintained
Each fact on this page is drawn directly from a published PanelPicks guide and is reviewed whenever that guide is updated; the date at the top reflects the most recent verification pass. If you spot an error or a figure that has gone stale, corrections are welcome — the linked guide carries the full context and sourcing for each claim.