The World-leadingQD-Mini LED with Precise Dimming SeriesQD-Mini LEDQLED with Mini LEDTCL's QD-Mini LED combines the merits of QLED and OLED technologies. transforming the traditional backlight into lighting that is close to pixel-level precision. It also utilizes the world's leading QLED technology. offering contrast and colour gamut comparable to OLED. while also providing higher peak brightness and a longer lifespan. This represents the future technology of large-screen displays.448 Precise Dimming ZonesDeeper blacks. higher brightnessPrecise Dimming Series refers to Mini LED TV with all-domain halo control technology. The new generation of powerful light-emitting chip. condensed Micro lens and Micro-OD make the light shape of individual zones more perfect. and its halo control ability is several times that of ordinary zones. Combined with the CSOT HVA panel technology with higher native contrast ratio and the world's leading light and shadow control algorithm. Precise Dimming Zones shapes the real light and shadow so that the TV's comprehensive picture quality performance is dramatically improved compared to ordinary TVs. bringing an upscale image experience.TCL All-domain Halo Control TechnologyMini LED TV: The Halo EliminatorThe TCL all-domain halo control technology covers the entire path from light generation to imaging. integrating high-efficiency light-emitting chips and self-developed lens technology. combined with Micro-OD. light and shadow control algorithms. and TCL's unique self-produced high-end CSOT HVA Panel technology. Through system-level precise control of light. it effectively solves the halo problem and delivers a premium viewing experience.Powerful Light-emitting ChipMaster light and dark. capture intricate detailsCompared with the previous generation of conventional light-emitting chip. A400U's ground-breaking Powerful Light-emitting Chip significantly improves brightness and energy efficiency. reproducing natural bright and dark scenes with clarity.Condensed Micro LensMicro lens technology. macro light masteryTCL's self-developed condensed micro lens technology precisely controls light direction through its arch bridge dimming design. Its selection of nano-optical materials with greater plasticity form a golden curvature with super light-focusing properties. and precisely controls light point by point. greatly improving the backlight uniformity and halo control capabilities. making the picture details clearer.Micro-ODBetter image quality. thinner bodyWith TCL's powerful Mini LED optical technology. A400U delivers an astonishing Micro-OD. It not only offers a slimmer TV unit but also significantly reduces the Mini LED halo issue by working with the condensed micro lens and ultra-high zoning. giving the stars in the night sky a deep. delicate. and sharp look.Dynamic Lighting Bionic AlgorithmEnriched dark and light details. more realistic image reproductionCombined with human perception characteristics and picture pixel information. the lighting details are optimized for SDR and HDR signals. while the details and contrast of light and dark scenes are greatly improved. Enjoy more real lighting effects of streaming media resources on TCL TV.Transient ResponseEliminate ghosting for greater clarityTransient response can prevent dark shadows. bright spots. and trailing caused by backlight lag in motion picture. It makes the motion picture sharper and enhances your viewing experience.Bidirectional 23 bitThe more precise the backlight control. the clearer the image detailsBidirectional 23 bit precision control technology can accurately sense the ambient brightness and colour temperature. and finely control the TV brightness and colour temperature to make the picture more vivid and colourful.CSOT HVA Panel TechnologyUp to 7000:1 ultra-high native contrast ratio. an excellent partner for Mini LED TVCSOT's HVA Panel technology stands at the forefront of the industry. By incorporating polyimide into the liquid crystal molecules. it forms a butterfly-wing-shaped microstructure. Combined with more precise panel design. this innovation enables precise control over the light passing through the liquid crystal layer. As a result. dark areas appear even darker. significantly enhancing the screen's contrast ratio and delivering a more vivid and immersive visual experience.HDR 2500 nitsIgnite your senses with brightnessThanks to its peak brightness of 2500nits. the A400U features an ultra-high contrast ratio of 25 million:1 and a higher dynamic range.With its precise dimming capability. the A400U displays both deep darkness and bright. vivid details.QLEDA Major Upgrade in Colour RenderingQLEDMore than a billion hues of perfect vivid colourTCL QLED utilizes Colourful Quantum Crystals. which integrate nanoscale quantum dot materials with organic materials in multiple layers. The high light transmittance film equipped achieves a 10% energy saving for the ent