OLED yellow vertical edge artifacts

[Axman]

Well we can rule that out then.

 

[fluxrez]

raymod2 I just bought this monitor (PG42UQ). I am absolutely in love with it, but I noticed the exact same issue. I almost RMA'd it until seeing this post. Glad I found it. I will not return the monitor. Despite this issue, its a gorgeous screen.

Thank you for the detailed images. Knocked the screenshots I was taking for ASUS out of the water.

 

[MaTaTom]

I have a 55" LG G2 TV, which I use for watching movies and also as a PC monitor.
The problem with the yellow/orange/lime colored objects is very obvious and highly disturbing in Windows 11.
For a video content it's negligible, but any static element makes it clearly visible, and depending on TV/signal settings it might be somewhat weaker or stronger, but it never disappears or gets faint enough.
The main problem is that the manufacturer (LG) obviously didn't give a sh*t about solving this issue even if the TV switches to game mode and/or the source is clearly signed as a PC. WRGB is not a new technology, and using TV as a monitor is also functioning idea, at least in the last 3-4 years. Although it is clearly a hardware based problem, a highly satisfying software/firmware solution is undoubtedly possible. There is no excuse for not solving this problem as a manufacturer (LG) and as an OS developer company (Microsoft, Apple). Considering the fact that nowadays more and more monitors appear on the market with the very same panel technology and with the same issue, I really can't understand how is it still not solved?!

I attached some examples.

 

[Bigmonitorguy]

I have a 55" LG G2 TV, which I use for watching movies and also as a PC monitor.
The problem with the yellow/orange/lime colored objects is very obvious and highly disturbing in Windows 11.
For a video content it's negligible, but any static element makes it clearly visible, and depending on TV/signal settings it might be somewhat weaker or stronger, but it never disappears or gets faint enough.
The main problem is that the manufacturer (LG) obviously didn't give a sh*t about solving this issue even if the TV switches to game mode and/or the source is clearly signed as a PC. WRGB is not a new technology, and using TV as a monitor is also functioning idea, at least in the last 3-4 years. Although it is clearly a hardware based problem, a highly satisfying software/firmware solution is undoubtedly possible. There is no excuse for not solving this problem as a manufacturer (LG) and as an OS developer company (Microsoft, Apple). Considering the fact that nowadays more and more monitors appear on the market with the very same panel technology and with the same issue, I really can't understand how is it still not solved?!

I attached some examples.

This problem is inherent in the pixel structure and the way the subpixels are lit to show different colors at different levels of brightness. The pixel design would need to be different for a productivity monitor use case. For that, LG had to go with a completely different panel in their professional OLED monitors, which an RGB panel from JOLED.

 

[Senn]

I'm sure any attempt to reduce visible fringing can only be done by either adding or taking away one of the subpixels in certain situations.

This would have the effect of either shrinking or expanding the on-screen element in question, plus the smarts required to know when and when not to do this is likely beyond the capability of the firmware and/or image processing of the panel.

 

[raymod2]

Guys go back and read the thread again. I proposed a very simple firmware solution. Simply change the logical grouping of subpixels from RWBG to WBGR. This puts the red and green subpixels next to each other where they can blend to form yellow. This is not a perfect solution but it would be vastly superior to what we currently have. They could make this an optional mode so the user could choose whether to use it or not. It is unacceptable that LG and Asus refuse to fix this problem.

 

[MaTaTom]

I'm sure any attempt to reduce visible fringing can only be done by either adding or taking away one of the subpixels in certain situations.

This would have the effect of either shrinking or expanding the on-screen element in question, plus the smarts required to know when and when not to do this is likely beyond the capability of the firmware and/or image processing of the panel.

Even changing the width by adding or removing subpixels would be a good solution for the somewhat larger object starting from 5-10 pixels. Or at least an option in the settings would be great, so that everybody could decide if a red-green fringe or a somewhat distorted object is a better solution.

When to do such a modification is really simple do decide, it depends only from the number of the side by side pixels with affected colors. The processors of the TV are nowadays capable of making unbelievable changes of the picture within milliseconds, so making the calculations for standing images should not be a problem at all. I really can't imagine that it is impossible, and can't accept such an excuse.

Even the solution mentioned by raymod2 should be possible, I don't see any reason not doing it. Recalculating the pixels for a SDR desktop use on the fly if there are no other picture altering algorithms active should not be a problem.

I simply can't accept that it is so hard to do. It's not something that you need for every signal source, only in a special situation, when using the TV/Monitor with PC in SDR desktop mode.

 

[MaTaTom]

On the other hand I also see a responsibility of the OS developer companies, and maybe even the graphic card manufacturers. They should also integrate in their drivers special solutions as options for different display types, so the user can choose depending from the panel type and personal preference what he wants to see.

 

[pendragon1]

lol you go tell nvidia, amd and microsoft that they have to be able to control the tv/monitor's pixel layout. let us know what they say....

 

[UnknownSouljer]

I have no idea how you think a firmware is able to change the physical pixel structure of a given display. What you're saying is the "fix" has to be done at the manufacturing level. Firmware can't make red OLEDs, (or blue or green) magically become a different color.

 

[MaTaTom]

lol you go tell nvidia, amd and microsoft that they have to be able to control the tv/monitor's pixel layout. let us know what they say....

Not to control the pixel layout, but to make similar tricks like Clear Type depending on the chosen display type.

 

[MaTaTom]

I have no idea how you think a firmware is able to change the physical pixel structure of a given display. What you're saying is the "fix" has to be done at the manufacturing level. Firmware can't make red OLEDs, (or blue or green) magically become a different color.

Simple, instead of addressing only one pixel with RWBG subpixels, addressing two pixels using WBG+R subpixels. You can think about it like shifting the whole image 1/4 pixel or one subpixel to right.
I don't think it's too complicated to imagine how it should work. Physically there is no extra gap between the pixels sideways, so it would not make the picture worse.

 

[sgupta]

I think this probably varies a good bit too. For example, I can notice it on my OLED, but for whatever reason, it doesn't really bother me, whereas things like blooming on other panel types really did. Still, it'd definitely be nice if there was a way to mitigate the issue. I'm curious if there's an easy way to address this like suggested why nobody has yet, tho'.

 

[XoR_]

From pixel structure alone its obvious they designed these panels foe TVs and PC use wasn't considered at all. Making gaming monitors using the same panel tech is an obvious afterthought.

Without completely removing white subpixel they could make RGBW pixel layout and up until RGB subpixels can create enough brightness they whould be used and W subpixel only engaged when its absolutely necessary.
This wouldn't mitigate issues completely and would drive power consumption sightly but at lower brightness levels text and edges would look correct. Also near black chrominance overshoot would be gone - arguably the worst issue of LG panels.

As it is however it doesn't seem likely they will treat their afterthoughts seriously so let's hope Samsung will do QD-OLED panel with proper RGB. From how things stand their tech is closer to perfection.