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LightBoost, G-SYNC, Turbo240: 120Hz Strobe Backlight LCDs / No Motion Blur! - Page 99

post #981 of 2929
Quote:
Originally Posted by Art Vanelay View Post

I've been trying to get this hack to work with my new VG248QE. Custom resolution utility doesn't allow me to add in a 144hz mode when I use it, so I'm stuck at 120hz when I enable light boost. I also can't seem to use Nvidia's custom resolution menu, as it doesn't allow me to enable light boost when I set it to 144hz through there.

You can't use lightboost with 144hz... it has to be 120hz.

120hz lightboost > 144hz without it
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post #982 of 2929
Thread Starter 
Quote:
Originally Posted by Art Vanelay View Post

I've been trying to get this hack to work with my new VG248QE. Custom resolution utility doesn't allow me to add in a 144hz mode when I use it, so I'm stuck at 120hz when I enable light boost. I also can't seem to use Nvidia's custom resolution menu, as it doesn't allow me to enable light boost when I set it to 144hz through there.
LightBoost is not supported at 144Hz -- only 100Hz through 120Hz. Besides, although 144Hz slightly less input lag, it has slightly more motion blur than all LightBoost modes (even 100fps @ 100Hz LightBoost has less motion blur).

It has less motion blur for the same reason CRT 60fps@60Hz has had less motion blur than regular LCD 120fps@120Hz: The sample-and-hold effect.

That said, if you want 144Hz non-LightBoost, you can. Use "Reduced" timings, not "Auto", when you add back the 144Hz either via nVidia Custom Resolution or via ToastyX Custom Resolution. That way you can simply switch between 120Hz / 144Hz to turn on/off LightBoost.
Edited by mdrejhon - 5/21/13 at 9:15pm
post #983 of 2929
Thread Starter 
There's now a new Motion Blur Comparision: 60Hz vs 120Hz vs LightBoost:
Quote:
These photographs compare motion blur during 60Hz vs 120Hz, as well as with the LightBoost strobe backlight enabled. All images below are captured from the same ASUS VG278H computer monitor. These demonstrates differences in perceived motion blur caused by the sample-and-hold effect.

These UFO objects were moving horizontally at 960 pixels per second an ASUS VG278H LCD, moving at a frame rate matching refresh rate, and captured using a pursuit camera using a 1/30second camera exposure (exposing multiple refreshes into the same image).

60 Hz Refresh rate:
Each refresh is displayed continuously for a full 1/60 second (16.7ms)
CROPPED_60Hz-1024x341.jpg

120 Hz Refresh rate:
Each refresh is displayed continuously for a full 1/120 second (8.3ms)
This creates 50% less motion blur.

CROPPED_120Hz-1024x341.jpg

120 Hz LightBoost:
The backlight is strobed briefly, once per refresh, eliminating sample-and-hold.
This has 85% to 92% less motion blur than 60Hz, depending on the LightBoost OSD setting.

CROPPED_LightBoost50-1024x341.jpg

At 120fps@120Hz, a 1/30second camera exposure captures 4 refreshes. All 4 refreshes are stacked on each other, because the pursuit camera is moving in sync with the 120fps@120Hz moving object at a 1/30second camera exposure. The brief backlight flash prevents tracking-based motion blur.

There is extremely little leftover ghosting caused by pixel transitions (virtually invisible to the human eye), since nearly all (>99%+) pixel transition ghosting & overdrive artifacts are kept unseen by the human eye, while the backlight is turned off between refreshes. The backlight strobe flash length, measured to be 1.5ms by TFT Central, is more than 90% shorter than a 60Hz refresh (16.7ms). The LightBoost 10% setting uses 1.5ms strobe flashes, while the LightBoost 100% setting uses 2.4ms strobe flashes. This is still greatly shorter than even a 120Hz refresh (8.3ms)! As a result, motion clarity on a LightBoost monitor is comparable to a CRT display.
post #984 of 2929
Quote:
Originally Posted by jderbs View Post

You can't use lightboost with 144hz... it has to be 120hz.

120hz lightboost > 144hz without it

Yeah, 120Hz lightboost looks a lot better than 144Hz. I guess I'll set it to that; I only got the 144hz one because it was the cheapest 120hz+ monitor I could find.

Is there any danger in using this long term? Also, is there any way to fix the weird color?
post #985 of 2929
Quote:
Originally Posted by Art Vanelay View Post

Yeah, 120Hz lightboost looks a lot better than 144Hz. I guess I'll set it to that; I only got the 144hz one because it was the cheapest 120hz+ monitor I could find.

Is there any danger in using this long term? Also, is there any way to fix the weird color?

There are ICC profiles somewhere in this thread you can try. Personally I have a spyder4elite to calibrate my monitors. You should try the different profiles here and see what works.
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post #986 of 2929
Thread Starter 
Quote:
Originally Posted by Art Vanelay View Post

Is there any danger in using this long term? Also, is there any way to fix the weird color?
Some (not all) LightBoost monitors are badly calibrated in LightBoost mode. Usually crimson. Presumably to compensate for the green color of 3D Vision glasses. This is a sad thing for manufacturers to do, and we can't adjust LightBoost color via monitor menus. Hopefully they stop this trend.

To fix this, you need to re-calibrate color using nVidia Control Panel. And if you want to force the color fix into video games, you need a utility such as cpkeeper. Google "XL2411T LightBoost crimson fix" for some example numbers to play with.

A Spyder4 or i1 Pro, is much easier though. Put the sensor on the screen, click a button, and your picture automatically adjusts to correct color.
Edited by mdrejhon - 5/21/13 at 10:30pm
post #987 of 2929
I prefer the NVIDIA control panel color tweaking as that sticks in games and most games disregard .icc profiles.
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post #988 of 2929
You still use the same values Vega?

32 47
52 52
47 47
?

How to add 144Hz non LB? So I acn just choose 144Hz in monitor settings and get 144Hz non LB? I dont see "Reduced timings" in CRU and in NVIDIA theres Reduced CVT something that gives some weird dots on the screen if using 144hz with LB
Edited by shedokan - 5/22/13 at 11:30am
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post #989 of 2929
cru-1.0.zip 344k .zip file Just use the lightboost.bin file (that should be available as an attachment somewhere here, Mark's blog or on hardforum's LB thread) to have the lightboost resolutions all enabled without having to change other stuff.

As far as "LCD reduced", which you need when re-adding a 144 hz (non lightboost only ) refresh rate, when you deleted all of the other ones (which happens when you inport lightboost.bin)

Make sure you are using the lastest CRU.exe. It should be CRU 1.0. There were beta versions before that. Previous versions of Cru do NOT have "LCD reduced" as an option.
Under 'detailed resolutions" under the three lightboost resolutions added by importing 'lightboost.bin", you would click "add->LCD Reduced" and enter 1920x1080 and 144 hz and you're done.

I attached it here.
Edited by Falkentyne - 5/22/13 at 3:55pm
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post #990 of 2929
This hasnt been cracked for use on AMD cards yet has is? ive not found results on google.
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