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Re: A95L BFI is Amazing but What’s Happening?

Posted: 27 Jan 2025, 14:54
by JimProfit
I did more testing this afternoon, I am now more convinced that there IS a difference to between 60hz and 120hz Motion Pro High.
The problem is I wouldn't be able to swear it is a x2 increase in motion clarity.

I just see a small difference between 60hz High/120hz Medium on one hand and 120hz High at the other, having switched back and forth between all of these.
I see that small difference in the text clarity on various game motion tests.

Maybe I'm an idiot because the MPRT test doesn't seem to work properly when I use it.
When I launch the test in 120hz MP High, at 480pixels/sec it shows the 2ms box with almost no gap, and when I launch it at 60hz MP High, it only shows the 4ms box also with an insignificant gap between the two lines.
But if I switch resolutions without relaunching the text, the results it gives seems incoherent results.

Sorry to derail the conversation about the A95L, my eyes tell me that my LG GX has clearer motion at 120hz High than it does at 60hz High, but I can't honestly say that it is 2ms/480hz equivalent. The difference for the same settings on my G1 are absolutely visible, but we're starting from a lower base. And my PG27VQ monitor at 120hz ULMB is noticeably clearer than the GX at 120hz Motion Pro High. I would say this is a true 1ms MPRT monitor.

Edit: Some online digging revealed that users have tested the GX/CX 120hz Motion Pro High to be ~3 or ~3.2 ms MPRT.
Which would mean that while 120hz Motion Pro High is indeed better than at 60hz, it is in fact the same as Motion Pro High on the G1/C1 (i.e rolling scan on a 38% window). It also explains the brightness difference on the GX between 60hz and 120hz and the fact that the difference in quality between Medium (240hz equivalent) and High (315hz equivalent) is not super obvious.
That's a big revelation for me, as long as you can get 120fps (or have access to frame gen) the brighter G1 is clearly the better compromise for HDR games with three levels of motion clarity/brightness arbitration.
The GX/CX with Motion Pro High remains the best Plasma alternative: Deep blacks, 4ms MPRT motion at 60hz, but the dim brightness is barely enough for SDR content.

Re: A95L BFI is Amazing but What’s Happening?

Posted: 29 Jan 2025, 15:16
by Adi-C
What the heck, this is big! 120hz bfi on a 2023 qdoled panel!? Would like this to be tested for brightness and what not.
Wonder if that means this years qdoleds will allow this too... Sony is quiet for now regarding their 2025 tvs... Will samsung enable this on theirs? Maybe it's already working on their 2023-24 models with updates, who knows, lol.
Either way, thank you for reporting it Duke Nukem, hail to the king!

Re: A95L BFI is Amazing but What’s Happening?

Posted: 01 Feb 2025, 08:17
by blurbian
On topic regarding the A95L and whether it really does strobe 60hz or not.
I wanted to add that RTINGS did a review on the A95L, and mention its BFI capabilities, but I am confused as to what they mean because of the way they phrase their test results. Maybe someone smarter can gather some info from the RTINGS A95L BFI test?

Re: A95L BFI is Amazing but What’s Happening?

Posted: 02 Feb 2025, 01:12
by JimProfit
blurbian wrote:
01 Feb 2025, 08:17
On topic regarding the A95L and whether it really does strobe 60hz or not.
I wanted to add that RTINGS did a review on the A95L, and mention its BFI capabilities, but I am confused as to what they mean because of the way they phrase their test results. Maybe someone smarter can gather some info from the RTINGS A95L BFI test?
The A95L absolutely strobes at 60hz.
RTINGS doesn't mention the TV being compatible with 120hz BFI, hence our level of surprise at the OP's affirmations on the matter.

We don't even know what kind of strobing this would be. Is it rolling-scan like on the old LG TVs? Or is the panel's native refresh 240hz, with the non-exploitable hertz only used for 120hz BFI or interpolation? Who knows.
I'd love to see detailed testing.
If we could reach ~4ms MPRT at 120hz/fps on an OLED that is much brighter than the G1, it would be a fantastic compromise.
The G1 peaks at ~800nits and Motion Pro High would in theory leave 38% remaining so ~300nits, or ~400nits at 120hz Motion Pro Medium.

Re: A95L BFI is Amazing but What’s Happening?

Posted: 18 Aug 2025, 17:07
by Duke Nukem
Because I see my post popping up as truth in some corners of the internet I want to clarify what I’m seeing.

With BFI not engaged on my TV when looking at the UFO tester I get 120 fps to pop up against the 60 fps UFO. At a speed of 240 pixels per second you can see persistence blur on 60 fps and 120 fps looks pristine.

If I engage BFI, the 120 fps UFO stays when reloading the page. 60 fps now looks from what I can tell identical to 120 fps without BFI and identical to the 120 FPS UFO that appears with BFI engaged. When I used to engage BFI at 120 fps on my C2 I would see image doubling. I had to ensure my source was set to 60 HZ. So at minimum the TV is taking a 120 HZ signal and applying BFI correctly. If I speed up the UFO test to 1200 pixels per second the 120 fps UFO starts looking like it is physically ahead of the 60 fps UFO (with BFI still engaged). I don’t know if that means BFI is engaged at 120 fps or what.

That’s all to say if I have a game that’s playing at 120 fps I don’t feel like BFI is necessary because it dims the screen but image persistence looks the same as 120 fps without. Not worth any brightness loss. At 60 it’s a no brainer in SDR unless you need VRR and in HDR you have a bunch of brightness headroom to still get a good HDR image with CRT like clarity. I can’t spot any flicker in BFI period and that was a problem on my C2 and my CX.

So in short I don’t know if the TV has support for 120 hz BFI. I do know engaging BFI at 120 fps doesn’t reduce the input signal and UFO test recognizes 120 fps and there’s no image doubling when enabling it at 120 fps either. Persistence blur looks the same with or without.