[sblantipodi]

Hi there,
it seems that the new 4th-gen WOLED panels have a much wider color gamut than QD-OLEDs.

Maybe I’m misunderstanding what color gamut actually means, but as I understand it, it represents the range or “volume” of colors a monitor can display.

So how is it possible that a display with a wider color gamut than QD-OLEDs still can’t fully saturate colors at high brightness levels?

What are the general consensous on the 4th gen Tandem WOLED?
I think that we lack a good table that shows pros and cons of both techs.

[PCM2]

Colour gamut (which 4th Gen Primary RGB Tandem WOLED excels at) does indeed describe the potential range of colours a monitor can display and its limits of saturation. You can think of this as a ‘2D’ way of looking at things. Colour volume is a specific term which adds the dimension of luminance into the equation, so in that sense it’s a ‘3D’ way of looking at things.

When you’re dealing with standard RGB subpixels (LCDs and QD-OLED) you shouldn’t really concern yourself with this distinction and should just think about the gamut and brightness – as two independent entities. But when you’re dealing with WOLED of any type, with an unfiltered white subpixel, the dilutive effect that has becomes more significant as brightness is increased. So the colour volume will shrink at those higher brightness levels and perceived saturation is massively decreased. Even if at lower brightness levels you could fully observe the expected saturation from their gamut.

If that isn’t an issue for somebody and they’re happy with the other WOLED limitations (specifically the fringing issues they have, which are distinct from those of QD-OLED) then I think it’s a nice technology. The colour gamut and brightness performance (not those combined at the same time into colour volume, as discussed) is excellent. But that doesn’t make it outright better than QD-OLED and I think both technologies have room to grow.

[sblantipodi]

thanks for the answer Adam.
but does the “color gamut” take brightness into consideration?
if not, I understand it,
if yes, I don’t understand it because a bigger gamut volume should be better even at higher brightness. or not?

I have seen videos of people that says that in SDR the contrast is inferior to the QD-LED but in HDR is superior.
https://youtu.be/Q5gWJDhU73Q?si=lYW7XjTyVD087-lD

[PCM2]

Luminance = measured brightness. So as I said, colour volume adds that dimension in. 🙂 Colour gamut does not consider it as if measured in the standard way. Technically it is accounted for to a degree when you measure a WOLED at very high brightness, as the dilutive effect can be observed to some degree during measurement. But the shift in gamut is not as extensive as if you were correctly measuring colour volume. I don’t want to complicate things too much, but colour volume involves many measurement points, whereas a gamut can be determined by measuring 1-4 patches depending on the device. This page explains colour volume analysis a bit better.

All OLEDs have essentially infinite contrast, so I’m not sure what you mean by that and don’t see any mention of that specifically in the video you linked. Unless I missed it. In general context it’s possibly somebody using inaccurate terminology and referring to luminance/brightness capability. But if you look at max frame (full white / SDR without aggressive ABL in play) RGB Tandem WOLED would offer superior brightness in both SDR and HDR. And more potential shade saturation in SDR but less in HDR (when observing bright shades).

[sblantipodi]

Damn, this subject is broader than I thought there are so many concepts to understand to get the full picture.
I’ve been following this world for quite a while, but I still lack some basics.
I never realized that colour volume is different from the gamut I always thought of those words as synonyms.

Even though I know that OLED has infinite contrast, I think many noobs like me sometimes use that word to describe a monitor’s ability to show a wide difference between dark shades and very bright elements.

Thanks for the clarification. Every time you write a post, I learn something new but it’s never enough! Still, it’s fun to keep learning new things, so thanks again.

[PCM2]

You’re welcome! I’ve also been learning a lot myself in my time testing monitors, it’s an endless journey of discovery. 😀

[tristtan]

I registered to the forums just to thank PCM2 for their explanation on this thread.

[PCM2]

Thanks tristtan, I’m glad this thread was helpful. 🙂

[PCM2]

Our Gigabyte MO27Q27G review is now live, thread here.

[Author]

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