“What is the difference between 4k HDR TVs that have LED noted in the description vs. those that do not have LED noted but are still 4k HDR?”
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The answer is nothing. Almost all tv's are LED lit LCD panels. The exception being OLED from LG in which each pixel is essentially it's own LED. The main components to worry about when 4k shopping is the panel. Most 4k HDR tv's are still using an 8 bit panel versus the 10 bit panel which is used for flagship tv's exclusively at this point. You may be asking what the difference is. 10 bit panel offers a 120+ color gamut versus 32 of 8 bit, also, 10 bit panels have around 64 active zones for picture quality versus the 12 zones offered via 8 bit. What is sad, is that Sony and Samsung have exclused Dolby Vision, DV is the best way to utilize 4k hdr content and is compatible with HDR10 (these are how the tv processor gets the information to make a 4k picture). HDR 10 is not compatible with DV and can not be added via an update (hardware issue). Now here is where it gets dirty. Many TV's (like this one) is offering 'hdr', or in Sony's case HDR1000, which common shoppers will confuse for being an upgrade (makes little difference if the 8 bit panel can't push the info giving, this takes the resolution from 4k to 1440p). The big companies instead are using "DITHERING" techniques to advertise hdr on 8 bit panels. Dithering is a form of upscaling by telling the pixel to switch from one color to another at a speed the eye can barely notice to give the impression of being different colors altogether. This will show through in the high contrast shots. Dolby vision is currently being carried by Vizio and LG. In addition, if the tv does not label 10 bit panel, then it does not have one. As of today Vizio is the only company selling a 65' under $2500 (P series starts around $2k) with a 10 bit panel. I know it is a lot to read and understand, but if you buy an expensive 8 bit panel 4k tv it will be noticably inferior in a short amount of time. Hope this helps.
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Sorry, there was a problem. Please try again later.Hello, thank you for your message. HDR content is given much wider dynamic range of luminance than standard video format at the creating process. HDR expands the range of both contrast and color. Bright parts of the image can get brighter, and the colors are expanded to show more bright blues, greens, reds and everything in between. The expansion of the contrast ratio and the color palette offers a more realistic, and natural picture. Oscar.
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