Blur monitor: Blur Busters | Everything Better Than 60Hz

Blur Busters | Everything Better Than 60Hz

Posted May 29, 2023 by Mark Rejhon

Display Motion Blur NVIDIA


A Better Motion Blur Reduction System for Gaming Monitors Long-time Blur Busters readers knows that Blur Busters started because of strobe backlight systems for reducing motion blur on displays, including our famous NVIDIA LightBoost HOWTO from over a decade ago!…

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Posted Jan 5, 2023 by Mark Rejhon


Many of you have noticed that the media section of Blur Busters had been dormant for a while – you’re not seeing things!  However, that does not mean we haven’t been busy. We want to wish y’all a Happy New…

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Posted Nov 26, 2021 by Mark Rejhon

Display Motion Blur Monitors


Today, on Black Friday 2021, lots of items are on sale now at Amazon, including multiple gaming monitors ViewSonic XG2431 Finally in Stock on Black Friday 2021! What makes this Black Friday particularly special for Blur Busters is that ViewSonic. ..

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Posted Aug 2, 2021 by Blur Busters Media

FreeSync G-SYNC Monitors


Updated 2020-08-02: Added AOC 360 Hz which was announced on this date. Big Boom of 360 Hz+ It shouldn’t come as any surprise that >300 Hz monitors are coming in thick and fast, so it only makes sense to list…

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Recent Headlines


Posted Aug 2, 2021 by Mark Rejhon

Gaming & Esports Monitors

Shockingly, 480 Hz Commercializing In China Before North America & Europe Most of our news audience don’t notice China until shocking surprises happens. But, according to BOE China’s Website, press release of 2021-06-30, they announced 480 Hz domestically in China…

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Posted Jul 27, 2021 by Mark Rejhon

Display Motion Blur HOWTO

ViewSonic XG2431 Finally Shipping Today with Blur Busters Approved 2. 0 ViewSonic just announced (2021-07-27) that XG2431 is now shipping, and Blur Busters announced (2021-04-09) the XG2431 Blur Busters Approved 2.0 status on Blur Busters founder Mark Rejhon’s birthday. As of…

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Posted Apr 26, 2021 by GrIdL0cK

FreeSync G-SYNC Monitors

This month, Dell unveiled four new gaming monitors, three of which appear to be curved VA panels, and the last, a flat Fast IPS. The new monitors don’t yet have prices attached to them, but they all appear to have…

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Posted Apr 12, 2021 by GrIdL0cK

Consoles TV

An article on 9to5Mac has discovered that Apple has made references to 120Hz support on Apple TV, something that could change the game significantly. The same publication reports to hearing rumours regarding a next-gen Apple TV for some time already…

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Posted Apr 9, 2021 by Mark Rejhon

Display Motion Blur Monitors Press Releases

[Toronto / Hamilton, Ontario, April 9th 2021]  Blur Busters is pleased to announce the relaunch of Blur Busters Approved Certification Programme, Version 2. 0. Blur Busters Approved is a certification programme that validates the quality of display motion on screens. For…

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Posted Apr 1, 2021 by GrIdL0cK

Monitors OLED

JOLED has started product shipment of its OLEDIO displays. These displays are OLED displays by mass production of the printing method, one that’s different to the conventional vapor deposition method. Blur Busters has mentioned before that JOLED has working to…

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Posted Mar 25, 2021 by GrIdL0cK

Virtual Reality

Not long ago, Blur Busters mentioned that Apple’s VR entry could be a game-changer, and that article pointed to the device perhaps coming out in 2022. Having further news on the device, Mac Rumors has said that the device plans…

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Posted Mar 23, 2021 by GrIdL0cK

FreeSync Monitors

Gigabyte’s new M32Q is being advertised as the world’s first KVM (Keyboard, Video, Mouse) gaming monitor — The ability to connect multiple computers to one monitor, keyboard, and mouse. The official Gigabyte site showing off the M32Q talks about the…

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Blur Busters Forums

TestUFO Motion Tests

Motion Blur Reduction (ULMB, LightBoost, etc)

Motion Blur Reduction for displays (ULMB, LightBoost, DyAc, ELMB, etc) are now very common on modern 120Hz+ gaming monitors. For example, many G-SYNC monitors come with a “ULMB” setting that can be turned ON/OFF. These technique utilize strobe backlights as the method of blur reduction.

Why Use Motion Blur Reduction?

Many of our readers crave perfect motion clarity. Some are former CRT users who prefer a similar motion clarity experience. It benefits certain kinds of games (more than others). In addition, some of our readers get eyestrain/headaches from gaming motion blur rather than PWM/flicker.

These are pursuit camera pictures of the Ghosting Test on Motion Tests

 – 60 Hz

 – 120 Hz

 – 120 Hz With Blur Reduction

Many Brands Names for Blur Reduction

Several monitor manufacturers have released many brands of Motion Blur Reduction modes in recent gaming displays, with names such as:

  • Motion Blur Reduction
  • LightBoost (by NVIDIA)
  • ULMB – Ultra Low Motion Blur (by NVIDIA)
  • PureXP – Pure Experience (by ViewSonic)
  • DyAc – Dynamic Accuracy (by BenQ ZOWIE)
  • ELMB – Extreme Low Motion Blur (by ASUS)
  • VRB – Visual Response Boost (by Acer)
  • Aim Stabilizer – (by AORUS / Gigabyte Technology)
  • MotionFlow Impulse (by Sony)
  • 1ms MPRT (by LG) — up to 16x clearer motion than “1ms GtG“!

They can usually be toggled ON/OFF via the monitor’s menus (e. g. ULMB found in monitors with NVIDIA G-SYNC) or via a utility (e.g. LightBoost HOWTO or Strobe Utility for BENQ Z-Series)

Quality of Blur Reduction Can Vary

Sometimes blur reduction looks very good — with beautiful CRT-style motion clarity, no microstutters, and no noticeable double images.

Sometimes blur reduction looks very bad — with distracting side effects such as double images (strobe crosstak), poor colors, very dim, very microstuttery, flickery.

In many cases, quality can be somewhere in between. Quality of strobing is improved on many monitors using either menus or utilities (Depending on manufacturer, they may be called “Strobe Phase”, “Duty Cycle”, “Pulse Width”). Sometimes the Factory Service Menu is required on some brands of monitors.

Strobe Crosstalk: Double Image Ghosting Effect

When turning on your gaming monitor “Blur Reduction” mode, you may witness something called strobe crosstalk — a double image effect. Some monitors do this better than others, and sometimes almost perfectly. This is from a combination of LCD GtG response limitation and the timing used by the strobe backlight.

Bad: maximum strobe crosstalk

 Worst case. Sometimes adjustable. Sometimes a newer monitor is needed.

Average: acceptable strobe crosstalk

 Common. Not noticeable in most games.

Good: nearly invisible strobe crosstalk

 Above-average but rare.

The quality of Blur Reduction can vary on different parts of the screen — usually worse at top/bottom edges, than the center of screen.

For a more technical understanding of the causes of strobe crosstalk, see Advanced Strobe Crosstalk FAQ.

Make Blur Reduction Smoother: Eliminate the Microstutters

Optimizing the computer configuration also help Blur Reduction greatly.

Blur reduction can amplify the visibility of microstutters. Which means it is critical to have a fast GPU, a good gaming mouse, and synchronize frame rates to the display’s refresh rate (using frame capping, or using VSYNC ON, etc).

The best virtual reality headsets (Oculus, Vive) also use Blur Reduction features benefits from all of this too, requiring synchronized frame rates in order to avoid the amplified microstutter effect of Blur Reduction modes.

Strobing visually looks highest-quality when you have a consistent frame rate that match the refresh rate.  If your framerate slows down, you may see dramatic microstuttering during Blur Reduction.

In some cases, it is sometimes favourable to slightly lower the refresh rate (e.g. to 85Hz or 100Hz for ULMB) in order to allow blur reduction to look less microstuttery — by more easily exactly matching frame rate to a lower refresh rate — if your GPU is not powerful enough to do consistent 120fps.

Optimizing For Reduced Input Lag

Blur Reduction modes by several vendors, may add input lag. There are many tips & tricks by users in Blur Busters Forums to reduce or eliminate “strobe lag” for Blur-Reduction-optimized computer configurations.

Instead of using VSYNC ON which adds input lag, one common alternative is the use of an in-game frame rate cap (such as a Source Engine fps_max setting within CS:GO, Team Fortress, etc). This can allow playing with good motion clarity during VSYNC OFF instead of VSYNC ON, while also eliminating most “Blur Reduction microstutters” issues. And also avoids the input lag of VSYNC ON that can interfere with competitive first-person shooters (FPS games). See HOWTO: Low-Lag VSYNC ON.

An alternative method to reduce microstutters during VSYNC OFF with scrobing, is to use framerates far in excess of refresh rate (such as 300 frames per second or more).

The great thing is Blur Reduction is an optional feature that can be turned ON/OFF, for different games and situations — whether you are a casual gamer — or a competitive eSports game player.

How Does Blur Reduction Work?

Blur Reduction use a strobe backlight synchronized to the refresh rate, in order to bypass most of the response limitations of the LCD panel.

The backlight is turned off while waiting for pixel transitions (unseen by human eyes), and the backlight is strobed only on fully-refreshed LCD frames (seen by human eyes). The strobes can be shorter than pixel transitions, bypassing the LCD panel’s GtG pixel response speed barrier.

This is a 1000fps high speed video of a strobe backlight in operation:

This is possible on modern LCD panels that has real-world GtG much faster than one refresh cycle, also a requirement of 3D-capable LCD panels (of which the very original invention, NVIDIA LightBoost, was invented for)

Some blur reduction backlights have an adjustable strobe flash length (e.g. “ULMB Pulse Width” setting).  There is a trade-off between motion clarity and brightness. The shorter the strobe backlight flash LightBoost also has an adjustment for this clarity-versus-brightness trade off, see LightBoost 10% vs 50% vs 100%, as does Blur Busters Strobe Utility for BENQ Z-Series monitors.

Some displays are able to adjust the backlight pulses as short as 0.25ms. This now results in Moving Picture Response Time (MPRT) measurements (in milliseconds) far faster than the LCD Grey-to-Grey (GtG) pixel transition measurements (in milliseconds).

MPRT and GtG are two very different display benchmarks. “1ms MPRT” is superior to “1ms GtG”. MPRT is a much more accurate benchmark of motion blur. Even “1ms GtG” displays can have “16.7ms MPRT”. That is motion 16x blurrier than “1ms MPRT”. To view motion blur that is unrelated to LCD GtG, see TestUFO Eye Tracking Animation.

For more info, see TFTCentral: Motion Blur Reduction Backlights for explanations. Low-persistence strobe backlights allows LCD to have CRT motion clarity. Also, manufacturers and monitor hardware modders should read Electronics Hacking: Creating a Strobe Backlight (for advanced readers only).

Why Do I Get Double Images?  Is it Strobe Crosstalk?

Frame rates are lower than the strobe rate will have multiple-image artifacts.

  • 30fps at 60Hz has a double image effect. (Just like back in the old CRT days)
  • 60fps at 120Hz has a double image effect.
  • 30fps at 120Hz has a quadruple image effect.

These duplicate images are not strobe crosstalk. It is caused by multiple backlight strobe flashes per unique frame.

To solve this, you want to match frame rate = refresh rate = strobe rate.

  • Get a more powerful GPU
    Strobing requires high steady frame rates
  • Or use a lower refresh rate to make it easier for your GPU
    100fps at 100Hz can look better than 100fps at 120Hz
  • Use VSYNC ON if you can
    If input lag is a problem, use HOWTO: Low-Lag VSYNC ON
  • Or use overkill frame rates if you can
    If you prefer VSYNC OFF, use frame rates far higher than refresh rate to compensate.

Flicker versus Flicker Free?

Most new gaming monitors are also capable of being fully flicker-free capable (PWM-free) too. Blur reduction backlights are optional feature that can be turned ON/OFF, depending on user preference.

Explanations Via Animation

These animations demonstrates the causes of display motion blur:

  • Animation: TestUFO Eye Tracking Demo demonstrates a major cause of display motion blur.
  • Animation: TestUFO Persistence of Vision is an optical illusion generated by display motion blur.
  • Animation: TestUFO Black Frame Insertion explains how strobing can reduce motion blur.

Monitors with Blur Reduction

For a list of monitors with motion blur reduction, see Official List of Gaming Monitors.

Blurry image on the screen in Windows – causes and solutions

Some users experience that the image on the monitor, especially fonts and elements with thin lines, look blurry, which can make the work not very comfortable.

This manual details the reasons why the screen may be blurry in Windows 11, Windows 10 and other versions of this OS and how to fix the situation.

Screen resolution

One of the most common causes of image blur is that the set screen resolution does not match the monitor’s native resolution.

For example, the monitor resolution is 1920×1080 pixels (this resolution can be found in the technical specifications of the device), at this resolution the font and other elements seemed too small to the user, and he set a lower screen resolution in the Windows settings.

The natural result is distortion and blurring, which occurs due to the fact that some of the pixels are “doubled” to display the image, and some continue to be displayed as one pixel. In games, in videos and in pictures, this may not be very noticeable, but for texts it is clearly visible.

Solution for this situation:

  • Set the correct screen resolution of the monitor as specified by the manufacturer. Usually shown as “recommended” in the display settings (but not always, it’s better to search by monitor model and see its resolution in the specifications). Details: How to change the screen resolution of Windows 11, How to change the screen resolution of Windows 10.
  • If resolutions are not “correct” or are limited, make sure you have the correct discrete and integrated graphics card drivers installed: there should not be any “Microsoft Basic Video Adapter” or “Standard VGA Adapter” in Device Manager. If there are no drivers, download them manually from official sites and install them on your computer.
  • If this makes text and other elements appear too small, use the scaling functions in the display settings of Windows 11 or 10. Please note that after changing the scaling before rebooting, it may not work correctly, but after that there are usually no problems.

Please note that if you have more than one monitor connected to your computer or laptop and the dual monitor mode is set to “Duplicate these displays”, you will only be able to set the same resolution on them, which sometimes leads to the inability to select the “native” resolution for one of the monitors. The solution here is to use a different mode, such as Extend These Displays.

Low pixel density on the screen

The second common situation is when you connect a large monitor or TV as a monitor to your computer, or change from one high-resolution monitor to another with a lower one and observe blurry fonts. Usually the reason is simple: the pixel density is too low compared to what you are used to.

For example, if you previously used a 15-inch 1920×1080 or higher resolution screen on a laptop, connected the laptop to a large TV with the same resolution: the resulting image will appear washed out, simply because it is. From three meters and in films, this is not noticeable, but in a text editor and icon captions from a closer distance it will be clearly visible.

As such, there is no solution for this case: if the reason is precisely the low pixel density with a large screen diagonal, most likely, you just have to put up with it.

ClearType settings

If everything on the screen is clear except for text, the reason may be incorrect ClearType settings – font smoothing technology. Try manually reconfiguring ClearType from the control panel or using Win+R and the command cttune

After going through all the setup steps, check if the texts are clearer and if the problem has been resolved. More details: How to fix blurry fonts in Windows 10 (will work for Windows 11 too).

Windows Visual Effects Settings

In some cases, adjusting Windows performance, including through third-party programs, can disable screen font smoothing and other visual effects. The fix is ​​easy:

  1. Press keys Win+R on the keyboard, type sysdm.cpl and press Enter
  2. Click the Advanced tab and click the Options button under Performance.
  3. Go to the “Visual Effects” tab, select the “Give Best View” option and apply the settings.

Other possible causes of motion blur

Some other factors that can cause motion blur in Windows monitors:

  • Picture Enhancement: This can be useful for normal TV content, but can greatly distort the display of small elements and texts from a computer. Check your TV settings and try turning off any signal processing and enhancements from the connected computer.
  • The use of adapters (adapters), especially from digital to analog input (VGA-HDMI), may distort the signal. If possible, use a connection without any conversion, ideally the digital outputs of the video card and the corresponding monitor inputs.
  • Image enhancement options, as in the first paragraph, may also be present in the monitor settings menu. If there are such options, try disabling them, it may help.

If the problem occurs only with an HDMI connection, the methods described in the article Poor image quality when connected via HDMI – how to fix it can help? in Telegram | Subscription Methods

Windows 10 App Blur Fix

Windows 10 More…Less

If multiple displays are connected to the computer or the screen configuration changes, some desktop applications may appear blurry. Windows 10 (version 1803 or later) may try to fix this issue automatically so apps won’t look blurry. Windows may not fix the blur in some applications, so they will still look blurry on high resolution displays.

Here are some examples of situations where this can happen.

  • You open an application on a high resolution display and then move the application to a different display with a different resolution.

  • You are connecting a laptop or tablet to a display with a different resolution and then projecting the image in Second screen only mode .

  • You are connecting remotely to another computer whose display resolution is different from the display resolution of the computer you are connecting from.


  • You must have Windows 10 (version 1803) installed to use the option to automatically fix blurry apps. To find out the version of Windows on your computer, see What version of Windows do I have?

  • If you have Windows 10 (version 1903) installed, the blurry app fix option is enabled by default. However, you can turn it off at any time. The notice to fix blurry apps varies by app and may still be displayed.

Application blur fix

If an application appears blurry or a notice about blurry applications appears on the primary monitor, follow these steps:

  1. org/ListItem”>

    Do one of the following depending on whether you are prompted to “Fix blurry apps?”

    • If prompted, select Yes, open settings and click Apply .

    • If the prompt does not appear, type 9 in the search box on the taskbar0091 advanced scaling options and select Fix blurry apps.

  2. In the Fix scaling for applications window, enable Windows to try to fix applications so that they are not blurry .

To test if Windows is able to fix the problem, close the desktop application that looks blurry on the primary display and then open it again.

If an app still appears blurry, you can try using different high resolution compatibility settings for that app, and prevent Windows from trying to fix apps so they aren’t blurry . For more information about this, see Making old programs compatible with this version of Windows.

Whether you’ve had blurry apps or seen a notification about apps that aren’t blurry, you can turn this feature on or off at any time.

  1. In the search box on the taskbar, type Advanced scaling options and select Fix unblurred apps .

  2. If you want to fix application scaling, enable or disable Windows will attempt to fix applications so they are not blurry .