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Strobelight - LightBoost Utility for AMD/ATI and NVIDIA
02-01-2016, 02:41 AM
Post: #812
RE: Strobelight - LightBoost Utility for AMD/ATI and NVIDIA
(01-25-2016 03:57 AM)ToastyX Wrote:  
(01-23-2016 04:49 AM)SilentParrot Wrote:  Ive always been wondering tho, why is there no option for 144hz strobbing?
LightBoost is part of 3D Vision, which only works at 120/110/100 Hz. There's no way to make the monitor strobe at 144 Hz.

(01-23-2016 04:49 AM)SilentParrot Wrote:  Oh and also it seems that strobbing can add little bit of input lag, got any details on that?
The monitor has to wait for the refresh to complete before it can strobe the backlight, so there's a little bit of delay from that. Each refresh takes about 8.3 ms at 120 Hz, so the middle of the screen would be delayed by about 4 ms.

Boring long story follows but hey it's a stormy weekend:

I also believe the original 3d vision which was 3d without strobing (see the Samsung 2233rz 3d mode thread) worked at 120hz also, with a different vertical total. 3D vision 2 also came out before there were any 144hz monitors on the market; most of the original 3d vision 2 monitors only ran up to 120hz refresh rate (ex: Benq XL2411T, XL2420T, XL2720T, VG278H with integrated emitter) even though the some of the same panels were later put in 144hz monitors when they found the panels could be pushed higher (with gamma degradation and some image quality loss). I believe the VG278HE 144hz CMI part used the same physical panel as the VG278H 120hz, but someone can correct me if I'm wrong.

Strobing doesn't work at 144hz for the same reason that ULMB doesn't work at 144hz...the refresh rate's persistence times are so much lower than the physical panel pixel transition times (which are already being pushed to the limits of TN panel tech) that "Strobe Crosstalk" covers literally half the screen at 144hz. I've tried benq blur reduction at 144hz and believe me, it's not pretty, so I always use a lower refresh rate. Lightboost mode Crosstalk is mitigated at 120hz due to something called "Accelerated scanout." which is impossible to use at 144hz. Users of Benq blur reduction exploited a firmware bug (to allow the same thing Lightboost mode did internally) to allow this with their own monitors (Benq admitted to me in email that our vertical total tweaks we used were actually bugs in the firmware).

Eizo's FS2735 is going to be the first monitor besides the older Benq Z series monitors (ignoring CRT's of course) to allow strobing at 144hz. Crosstalk results are going to be very interesting, however...
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RE: Strobelight - LightBoost Utility for AMD/ATI and NVIDIA - falkentyne - 02-01-2016 02:41 AM
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