So you can have 4K screens which are OLED (almost all of them are, besides some expensive 8K OLED TVs), and you'll have 4K screens which can be QLED, mini-LED or other tech.
Its fantastic distinction ratio tends to https://aliciahtos781276.gynoblog.com/28944232/how-much-you-need-to-expect-you-ll-pay-for-a-good-tech-reviews