Strobing at lower rates than refresh?

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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7bhsq
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Joined: 12 Aug 2017, 00:45

Strobing at lower rates than refresh?

Post by 7bhsq » 25 May 2020, 01:14

Just a random thought. Would it be technically possible to strobe at say, 60hz while at 240hz refresh rate? Would you not get the advantages of faster scanout for games that are limited to 60fps while also getting the benefits of blur reduction?

7bhsq
Posts: 15
Joined: 12 Aug 2017, 00:45

Re: Strobing at lower rates than refresh?

Post by 7bhsq » 31 Jul 2020, 00:11

No response from anyone? I can't be the only one who's thought of this.

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AddictFPS
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Joined: 15 Jan 2020, 14:13

Re: Strobing at lower rates than refresh?

Post by AddictFPS » 31 Jul 2020, 00:45

Viewsonic XG270 with strobing already work internaly at 240Hz scanout, get advantage of fastest scanout is a key feature of good tuned strobing, but single strobe frequency range is limited from 75 to 240, due to flicker issues. There are a request to optionaly from OSD unlock 50-75 range, but seems that Viewsonic not want to do it. At least they not respond the request.

The best results to emulate 60Hz single strobe in XG270 is set 120Hz strobed with Chief settings, and use software BFI (Black Frame Insertion). This result in old games with emulator MAME and others, a very good motion panning smoothness. If background is dark, flicker is not severe.

For modern 3D games locked at 60FPS, you can try ReShade BFI, is a post-process shader script, to force BFI at rendering stage, because Nvidia refuse include it in their drivers :( But be aware to use it in multiplayer, its a 3r party software not well know, maybe some anticheats consider it cheat and ban your account !

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Chief Blur Buster
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Re: Strobing at lower rates than refresh?

Post by Chief Blur Buster » 31 Jul 2020, 01:32

7bhsq wrote:
25 May 2020, 01:14
Just a random thought. Would it be technically possible to strobe at say, 60hz while at 240hz refresh rate? Would you not get the advantages of faster scanout for games that are limited to 60fps while also getting the benefits of blur reduction?
Many strobed modes on some monitors already do something like this already (within their strobe range).

On the XG270, all refresh rates 75Hz to 240Hz automatically scanout in the total darkness (best-effort) in 1/240sec regardless of strobed Hz.

Other times, this is called the "Large Vertical Total" trick usually done on BenQ Zowie monitors. We're #1 in Google about the Large Vertical Total Trick to accelerate scanout during lower refresh rates. It is also part of Quick Frame Transport too.

Now, regarding 60Hz strobing -- the 60Hz non-strobe is an arbitrary limitation (like a CPU cap or an overclock cap) that is somewhat a little more political/bureaucracy in many manufacturers. It flickers badly -- worse than a 60Hz CRT due to global flashing instead of rolling-scan flashing (phosphor dot always illuminated).

However, several users want this anyway. Workarounds include software-based black frame insertion trick, www.testufo.com/blackframes -- done in some emulators to black-out every other strobe to convert 120Hz hardware strobe to 60Hz strobe.
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7bhsq
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Joined: 12 Aug 2017, 00:45

Re: Strobing at lower rates than refresh?

Post by 7bhsq » 01 Aug 2020, 21:36

I see. Thanks for both of these responses. I wasn't aware that a large vertical total would speed up the scanout. I'm using a PG258Q and have been enjoying strobing at 60-144hz for the past few years. It's too bad the manufacturers are hesitant when it comes to 60hz strobing.

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