Blur Busters Forums

Since I tried 144Hz IPS and I wasn't happy with the glow, now I'm testing 165Hz VA, but I'm not happy with the VA colors/blacks.

I read somewhere on reddit that only fast IPS panels have excessive IPS and bad uniformity. Something about thin layer.

Is there a connection between high refresh rate and IPS glow / uniformity?

Because I'm thinking about 75Hz IPS 1440p 27 inch monitor as middle ground... basically I will sacrifice the speed for better looks.... if that's a thing?

EvolutionBG wrote: ↑

29 Jul 2023, 04:27

Is there a connection between high refresh rate and IPS glow / uniformity?

Yes and no. There's a few contributing factors:

1. IPS and most other LCD panel types use to be fully backlit and not edge lit, with thicker, sturdier bezels that prevented more backlight bleed and increased overall uniformity in general, but this was at the expense of weight, appearance, and form factor.

2. The higher refresh rate panels are now only IPS "type," making some sacrifices over the traditional/original IPS 60Hz types of-old to accomplish their speed improvements.

3. Some of the newer quantum dot-type IPS panels have less layers, allowing more uninhibited light output, which can decrease contrast ratio and increase overall uniformity issues.

EvolutionBG wrote: ↑

29 Jul 2023, 04:27

Because I'm thinking about 75Hz IPS 1440p 27 inch monitor as middle ground... basically I will sacrifice the speed for better looks.... if that's a thing?

You'd likely have to go back to a non-edge-lit, non-VRR, non-strobing Dell model if you wanted any significant improvement over modern IPS-type panels where glow, BLB, and general uniformity are concerned. Question is, are they still available new? Possibly, if you buy a generic office model, but you'd be sacrificing a lot of features and performance.

That said, IPS has always had glow. Only a couple gaming models in the far past used "low" glow panels via specially polarizing layers, but this causes other issues (reduced brightness output, extra expense, etc).

Have you considered OLED?

Thank you for the reply.

I have this old backlight IPS 75Hz monitor Philips 227E4QHAD/00 - (https://www.philips.co.id/c-p/227E4QHAD ... image-lite)
Which also have IPS glow, but it's minimal. It also have much better contrast than 144Hz LG 27GN800-B (which is not quantum dot-type or nanoIPS).

My last hope is some older backlight 75Hz IPS panels ...
or 144Hz LG 27GN800-B, which will be a huge compromise... at this point I don't even want to try a newer quantum dot-type or nanoIPS...

OLED are not an option, because of the price and burn-in issues / low brightness.

jorimt wrote: ↑

29 Jul 2023, 15:59

You'd likely have to go back to a non-edge-lit, non-VRR, non-strobing Dell model

Do you have any particular model in mind (27 inch 1440p 75Hz)? Thank you.

EvolutionBG wrote: ↑

30 Jul 2023, 04:09

Do you have any particular model in mind (27 inch 1440p 75Hz)?

No. The only "traditional" IPS-type panels I knew of were basic Ultrasharp Dell office models ~7 years ago, and they were all 60Hz and already edge-lit by then as well (I went through several of them because of uniformity issues, ultimately settling on a gaming model instead).

You're only going to find above 60Hz direct/back-lit IPS-type panels in a handful of expensive G-SYNC Ultimate 4k monitors with FALD (be it LED or mini LED), but then you get other issues like blooming.

Only other option is to research what pre-edge-lit models have the refresh rate you want (all of which will likely be limited to 1080p), and then scour eBay for them used. Finding a traditionally back-lit IPS LCD is basically like looking for a CRT at this point.

So there is no point of trying newer 75Hz 27 inch 1440p IPS? Even professional designer monitors?

Because 10 months ago I tried 24" Lenovo 100Hz (G24qe-20) and it had normal amount of IPS glow - uniform blue-ish glow and almost no backlight bleeding. Just like my old monitor... but I returned it because it needed scaling and also I liked the bigger size more (tried it after I tried 27" LG, which I sold later and now looking for a new one).

So this excessive IPS glow I witnessed in the 27 LG-27GN800-B is due it's size and because is edge-lit? Only 27" have that much of it? Because the edge-lit 24" Lenovo didn't have it.

EvolutionBG wrote: ↑

08 Aug 2023, 15:53

So this excessive IPS glow I witnessed in the 27 LG-27GN800-B is due it's size and because is edge-lit? Only 27" have that much of it? Because the edge-lit 24" Lenovo didn't have it.

IPS glow is primarily dependent on the particular panel revision/sub-type. Second to that, the size of the panel (probably to a very small degree, and likely sometimes not at all), how it is mounted to the chassis, and how far and from what angle you are viewing it can contribute to glow severity as well.

But again, all IPS/IPS-type panels have glow, regardless of size, edge/back lighting, chassis, etc. Every single IPS model I've owned over the years has had varying degrees of glow at all four corners (some worse in one corner than another, etc).

If you're looking for a specific level of IPS glow, there's no global look-up "chart" or comparison tool for it that I know of, so you'll just have to read reviews and owner forums on the models you're interested in, factor in any deal-breaking trade-offs (like with the G24qe-20) and decide from there.

Hello again.
Well, 2 days ago I got the ASUS ProArt Display PA278QV.
This monitor has minimal IPS glow equally at all 4 corners - totally acceptable and good contrast ratio above 1100:0 (by eye seems perfect for IPS).
It has nothing to do with the LG 27GN800-B glow and terrible contrast which is 144 Hz and the Asus is 75 Hz.
Also very good gray/black/color uniformity for the Asus, so much better than the LG's 144 Hz.

So I think there is a direct connection with the how fast the IPS panel is and how much it glows and reduces its contrast. Talking about 350-380$ budget range in Bulgaria.

The bad things for me about Asus are the ruler at the bottom bezel (I covered it with black tape ) and the matte coating, it is semi matte and I think full "classic" matte are better for people who likes bright environment (dark rooms make me anxious and depressed).
And of course - it is only 75 Hz.
Also I feel some eye strain, not sure if it's because the ~20kHz PWM dimming frequency or the coating or something else.

The LG27GN800-B uses fully matte coating (I think 25%?) which for me is very important, but the manufacturers doesn't care to give more options for the coatings. Or at least some information whether is matte or semi matte.

I don't know what do to - because almost all of the 144 Hz+ monitors use these very light semi matte coatings (even worse than the PA278QV).

It's either this ASUS PA278QV or LG27GN800-B.
LG27GN800-B - terrible glow and contrast with interlace pattern artifacts, but very fast with "classic" matte coating.
Or the slower PA278QV with light matte coating, but great visuals with no severe IPS defects.

I used the LG27GN800-B for about 7 months before I decided to sell it. Because it had 2 subtle horizontal lines at the top part of the display (very annoying), but I almost got used to the glow and the artifacts.

Now I have remaining 12 days window for return for the PA278QV.

But I really do prefer 144 Hz... but with classic matte coating, ~1000:1 contrast ratio without severe IPS glow and visible interlace pattern artifacts at >100 Hz.
Which seems impossible to me at this point.

NanoIPS have even less contrast. Not sure about FastIPS models - like the new Dell G2724D, I'm waiting for the upcoming review from rtings.com - https://www.rtings.com/discussions/D3Pm ... ell-g2724d

I guess it's true once you try 144 Hz you never want to go back ...

EvolutionBG wrote: ↑

21 Aug 2023, 16:56

Hello again.
Well, 2 days ago I got the ASUS ProArt Display PA278QV.
This monitor has minimal IPS glow equally at all 4 corners - totally acceptable and good contrast ratio above 1100:0 (by eye seems perfect for IPS).

Yet it apparently has too many trade-offs, which you then go on to list. That's always the catch. No matter what monitor you settle with, you'll have to end up accepting at least one trade-off (if not multiple).

EvolutionBG wrote: ↑

21 Aug 2023, 16:56

So I think there is a direct connection with the how fast the IPS panel is and how much it glows and reduces its contrast. Talking about 350-380$ budget range in Bulgaria.

I already inferred that the faster IPS panels sometimes have to sacrifice other aspects of panel performance for speed (max Hz + lower native GtG), and that often includes a hit to contrast ratio, which may indirectly make IPS glow more apparent in some cases.

And again, not all IPS panel types have exactly the same traits.

Actually the Dell G2724D is almost perfect in regard of IPS glow / uniformity. It has very acceptable contrast too.
I was very pleasantly surprised. If they also had managed to get rid of the inversion artifacts...that would be the perfect monitor.
Maybe in the future? I hope so.