Local dimming on edge-lit displays can be beneficial, but it can also be pointless if badly implemented. A good direct-lit display without localized dimming is much better than an edge-lit display with poor local dimming.
By default, local dimming is set to High that makes the lighter shades look way too bright. This can strain your eyes and make the picture look odd at times. Consider setting it to low and see if you like the picture quality with it turned off. It's likely to look more natural.
Less processing-heavy features like dynamic contrast systems and local dimming controls (which adjust the light outputs of different sections of an LCD TV's lighting) can also contribute slightly to input lag.
For an LCD TV, by any name, to be able to produce HDR images, it needs to use a technology called local dimming. Behind, or along the edges, of every current LCD TV are tiny LED lights. With few exceptions, if a 4K LCD TV has local dimming, it's probably HDR compatible and most likely able to display a true HDR image.
Local dimming is a feature found on some monitors that dims the backlight behind darker areas of the screen. This makes blacks appear deeper and darker on those parts of the screen, which can significantly improve the viewing experience when watching videos or playing games, especially in HDR.
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- SamsungSamsung.
- HisenseHisense.
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- SunBriteTVSunBriteTV.
Because OLED pixels can turn off completely, OLED TVs can produce absolute black and a contrast ratio that is essentially infinite. Only the very best LED LCD TVs that use full-array local dimming (FALD) backlighting can approach OLED's black level performance.
The number of dimming zones is set at 30 local – double the previous year's -- while the M7 TVs include up to 600 nits of peak brightness.
QLED comes out on top on paper, delivering a higher brightness, longer lifespan, larger screen sizes, and lower price tags. OLED, on the other hand, has a better viewing angle, deeper black levels, uses less power, and might be better for your health.
Organic contrastOLED stands for organic light-emitting diode. Each pixel in an OLED display is made of a material that glows when you jab it with electricity.
In terms of picture quality, OLED TVs still beat LED TVs, even though the latter technology has seen many improvements of late. OLED is also lighter and thinner, uses less energy, offers the best viewing angle by far, and, though still a little more expensive, has come down in price considerably.
What to look for (continued) Backlighting: There are two basic types of backlighting used in LED-backlit LCD TVs: array and edge lit. Array backlighting can also produce significantly more brightness than edge lighting, which comes in handy for HDR. Edge lighting tends to bleed more light around, yes, the edges.
Both edge-lit and full-array LEDs can produce high-quality images, but the latter type of LEDs typically come out on top. Full-array LEDs typically have more bulbs than edge-lit array. As a result, they produce more illumination that manifests in the form of brighter images.
Though backlit local dimming is theoretically the best, some edge-lit models (like last year's HX850) do such a good job with their less-than-ideal LED placement that they can look fantastic.
Micro Dimming Ultimate Technology enhances the picture quality of Samsung TV by analyzing each frame of video to optimize the LED backlight and video signal in real time. Micro Dimming Ultimate enhances picture quality through contrast, colors and details.
TVs with full-array backlighting have the most accurate local dimming and therefore tend to offer the best contrast. Since an array of LEDs spans the entire back of the LCD screen, regions can generally be dimmed with more finesse than on edge-lit TVs, and brightness tends to be uniform across the entire screen.
Just as frame dimming is a cheaper version of edge-lit dimming, micro dimming is a cheaper version of full-array dimming. In fact, in micro dimming, it doesn't actually dim the backlight. Instead, it varies the contrast of different zones in the frame. So full-array dimming is better than micro dimming any day.
Edge-lit local dimmingMost TVs with local dimming are edge-lit. As the name suggests, the LED lights sit around the edges of the screen instead of behind it. They need fewer LEDs than back-lit or full-array models – so they're thinner and more energy-efficient to run.
