Comment Re:"Brightness is important for HDR" (Score 1) 33
OLED has no problem with black levels. You can't get much blacker than off with zero light emitted.
OLEDs have historically had problems with near-black levels, which I think is what the parent was referring to. But recent models have pretty much fixed this.
OLEDs also have problems with near-black uniformity, usually in the form of very faint vertical streaks that can't be seen in *most* normal viewing. Some panels are worse than others. Panasonic sets tend to be more uniform than LG for some reason, even though LG make all the panels.
Personally I'd take these issues over the horrendous blotchy dirty screen effect seen on all LED TVs (even QLEDs).