Originally Posted by imagic
Because that's how the math works. That's what HDR10 can handle. Therefore, that's the spec. Not all HDR10 is mastered to 1000 nits, it's a choice.
"by that logic, oleds are crap TV's for hdr, they cant even do 1000 nits yet."
There's no logic at work aside from the math and the fact that HDR10 accommodates up to 10,000 nits. Period.
Granted currently HDR10 maxes out at 4000 nits, just like DV.
Oh and that the Sony 10,000 nit display makes all OLEDs (and LCDs) I've seen look like... what's that word you used??? [IMG class=inlineimg]/forum/images/smilies/tongue.gif[/IMG]
I'm not from the 'bright enough for me' group that you find in the oled subsection, I know my sony x930e provides a tangible benefit in that it doesn't have to resort to compressing bright highlight detail /tone mapping on the level of oleds.
but the 10000 requirement to see hdr as it was intended to is simply impractical for many years to come. not just 10000 nits, you need a display that covers the full spectrump of th rec 2020/bt 2020 colorspace to see all the shades hdr intended you to. and with dv we should also be watching on displays that are native 12 bit.
that's all very far off and difficult to have in a consumer tv. both due to technical challenges and cost
With lcd's , the issue of going 10000 nits is that the higher you go with peak brightness, the harder blooming becomes to control. you can still see blooming in hdr content on a sony z9d (~1800 nits), for a 10000 nit display, you'd need something special to control the blooming and light spilling into the adjacent pixels. (what sony showed at ces was just a prototype)
with oleds, the issue is the technology doesn't allow for very bright displays, it is still under 1000, and when they move to top emission, they'll get better with peak brightness but not anywhere close to something like 10000.
that's the technical aspect, the cost is the other one, could they make a 10000 nit display at consumer prices any time soon? I don't think so.