G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Ask about motion blur reduction in gaming monitors. Includes ULMB (Ultra Low Motion Blur), NVIDIA LightBoost, ASUS ELMB, BenQ/Zowie DyAc, Turbo240, ToastyX Strobelight, etc.
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Chief Blur Buster
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Re: G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Post by Chief Blur Buster » 14 Jan 2024, 17:50

Hybred wrote:
11 Jan 2024, 09:28
Can backlight strobing & things like g-sync pulsar work on MiniLED LCDs? Or would the dimming zones cause incompatibility.
In theory, no.

In reality, yes it is a problem.


Not all pixels refresh at the same time, so it is a timing precision problem, since not all pixels refresh at the same time, and display manufacturers didn't really consider perfect 1:1 sync between LCD scanout and FALD scanout (synchronizing two scanouts perfectly).

Local dimming electronics (FALD pulse timing controllers) are too slow or inflexible-programmability to be pefectly in sync with LCD scanout (www.blurbusters.com/scanout). Local dimming often has motion artifacts like 1-frame lagbehind effects, and local dimming also adds input latency, so there's some difficulties.

These are solvable, but... the race to bottom for cheaper 3-figure-priced local dimming has made it hard to add luxury features to MiniLED controllers... The situation could very well change, but 100% of all MiniLED controllers I tested, aren't able to have enough timing precision to do strobing at high quality (yet).

Related topic:
Why Do Lower Hz Have Clearer Strobing?.
See the engineering diagrams.

Except add the engineering complexity dimension of FALD, with precisely timed scanning backlight behavior. FALD could become a perfect scanning backlight, if the timing precision is re-engineered with new FALD controller chips. But such special FALD controller chips doesn't yet exist on the consumer market. Ouch.

Blur Busters used to be named scanningbacklight[.]com in year 2012 when we discovered engineering problems of scanning backlights at www.blurbusters.com/faq/scanningbacklight ... Today, FALD means near-perfect scanning backlights are theoretically possible, but we need better timing-controller chips for FALDs first. You wouldn't need Large Vertical Total tricks anymore, since you can flash a row out-of-phase of LCD scanout, and have low crosstalk, and delightfully good "VSYNC OFF" latency mechanics (panel:scanout sync, TOP=CENTER=BOTTOM preserved), and be a strobe dream for LCDs. But we're not quite there yet.
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

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Supermodel_Evelynn
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Re: G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Post by Supermodel_Evelynn » 18 Jan 2024, 12:22

If I could get a monitor even a 1080P that does proper VRR and BFI at the same time and has good brightness and CRT like 60hz clarity

I would pay $1000 USD for a monitor like that.

I am just hoping Chief can pull it off with the upcoming Blur Buster 2.0 monitors.

He said BenQ manages to do it with some sort of trick overclocking the LED to flash at 1000 nits.

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Re: G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Post by Chief Blur Buster » 18 Jan 2024, 21:04

Supermodel_Evelynn wrote:
18 Jan 2024, 12:22
He said BenQ manages to do it with some sort of trick overclocking the LED to flash at 1000 nits.
Essentially yes, a brief overvoltage boost (a metaphorical overclock).

Talbot-Plateau Theorem requires that. 1000nit flash 25% of the time averages out to 250 nits. BenQ does quite a large voltage-boost to their LEDs to keep strobing bright.
knypol wrote:
13 Jan 2024, 15:37
Is BFI better than ULMB or Dyac? Can it work with VRR? From what i understand it also divides in half current refresh? GSync Pulsar in short is ULMB + VRR at the same time?
Neither is better, it's Right Tool for Right Job.

- Refresh cycle level BFI flickers less but reduces less blur (due to rolling or semi-rolling nature, even if not sub-refresh).
- Backlight strobe flickers more (global flash) but reduces more blur.

This is because motion blur is proportional to frame visibility time (frametime on sample and hold, pulsetime on strobed).

That's why you've got the 2 methods of blur busting
- Brief frames via brute framerate (non-BFI/strobe method)
- Brief frames via flash briefly (BFI/strobe method)

And it's easier to flash a backlight for 1ms, than to display a panel refresh cycle for 1ms (that'd require 1000fps 1000Hz).
Head of Blur Busters - BlurBusters.com | TestUFO.com | Follow @BlurBusters on Twitter

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Forum Rules wrote:  1. Rule #1: Be Nice. This is published forum rule #1. Even To Newbies & People You Disagree With!
  2. Please report rule violations If you see a post that violates forum rules, then report the post.
  3. ALWAYS respect indie testers here. See how indies are bootstrapping Blur Busters research!

Vad1us
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Re: G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Post by Vad1us » 05 Mar 2024, 08:21

Is NVIDIA Pulsar out? Are there any reviews? I saw monitors that should support it are selling. I am interested in this technology, but cant find any reviews.

phzera
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Re: G-SYNC Pulsar: Blur Reduction or Black Frame Injection in cojunction with Variable Refresh Rate or Adaptive Sync

Post by phzera » 07 Jul 2024, 23:57

Any news ? Will the PG248QP be supported?

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