![]() ![]() This pure white light, in turn, helps the TV’s color filter perform more efficiently and accurately. When red and green quantum dots are layered on top of a blue LED backlight, it creates a much fuller-spectrum white light than can be achieved using white LEDs. QLED, or quantum dot LED, uses nano-particles that have a special property: When light shines on them, they can emit their own light, specifically tuned to a certain color. So far, we haven’t seen a mini-LED TV that gets as perfectly black (and without any blooming) as OLED, but that gap between backlit TVs and emissive displays such as OLED TVs is smaller than it has ever been. This not only makes the darker portions of the screen darker, but the contrast created makes the lighter portions seem even brighter. With mini-LEDs, local dimming becomes far more effective because it increases the number of dimmable zones while decreasing their size, making it easier to isolate dark areas from light ones. But even with FALD, if there’s a big difference between the brightest part of the screen and the darkest, it can lead to blooming - an effect that makes it look like light is leaking from the bright portion into the darker portion. To achieve a deep, dark black in a specific portion of the screen on a backlit TV - the kind you expect when looking at space scenes - you need to shut off the backlight in that portion entirely. It’s all about the light (and the dark)Īs we said earlier, more LEDs lead to better brightness - beneficial for HDR as well as making the picture visible in bright rooms - but it also leads to better darkness too. We’re talking about being able to fit thousands of LEDs in a space that once could support only hundreds.Ī 4K TV has just over 8 million pixels, so mini-LEDs are still significantly bigger than an individual pixel, but that’s OK: Mini-LEDs are so much smaller than standard LEDs that you can still see a big difference. It breaks through the previous size barrier by introducing LEDs that are much smaller than any that have been used so far. This size-based constraint on the number of possible LEDs is what makes mini-LED technology so exciting. The bigger they are, the fewer you can use. There’s a physical limit to the number of regular LEDs you can squeeze into a given space, which is determined by the size of the LEDs themselves. In a perfect world, you’d have one LED for every pixel in an LCD matrix, but right now, that’s impossible. The general rule here is that the more LEDs you can pack into a backlight, the brighter it will get and the more control you’ll have over that brightness in very specific areas of the TV’s image. These are known as full-array local dimming (or FALD for short). Inexpensive LED TVs may use only a few LEDs arranged around the outside edges - thus the term “edge-lit” TVs - while the most expensive sets use hundreds of LEDs arranged in a grid-like pattern, sub-divided into individually controlled zones. ![]() ![]() But not all TVs using this technology are created equal. LED TVs and QLED TVs (which are essentially a subset of LED TVs) use LEDs as their backlights. Samsung takes on TCL with 98-inch 4K TV that costs just $8,000 Best TV deals: cheap TVs worth buying from $88īest Prime Day TV deals: Get a 50-inch 4K TV for under $200 and more ![]()
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