“What's the difference between Ultra High Def. and High Dynamic Range? I just had delivered the TCL 65" Roku TV model # 65R635 which I thought was Ultra High Def., but the box says High Dynamic Range. Hoping I didn't order the wrong TV. Thanks”
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Ultra High Definition refers to the resolution of the TV, which is 4K on both our 5-Series and 6-Series. High Dynamic Range refers to color and contrast, which our 5-Series and 6-Series supports both HDR10 and Dolby Vision. Hope this helps! Thank you, TCL Customer Support
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