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UHD refers to the 4K resolution. Quantum dot technology, or QLED, lets you experience lifelike picture quality with vivid wide color and striking contrast. Hope this helps! Thank you, TCL Customer Support
Sorry, there was a problem. Please try again later.To me, both are almost the same because they both referred to clarity of the pictures of the product. I know UHD is ultra high definition of the product pictures while the QLED is about both sound and pictures of the product.
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