Ghosting Test
Detect motion blur, pixel overshoot, and inverse ghosting on IPS, VA, and OLED panels. A moving block reveals response time issues that hide during static use.
Why use this motion tool
Multiple motion patterns
Block, scroll, pendulum, and UFO-style sweeps exercise your panel's response time across different speed regimes.
Background color options
Test on grey, black, and color backgrounds to expose the smearing that VA panels show on dark transitions.
Speed presets
Toggle between 240, 480, 960, and 1920 pixels per second to see how ghosting scales with motion velocity.
Real-time visualization
Trails behind the moving block stay visible long enough to photograph for side-by-side panel comparison.
What is motion
Ghosting is the visible trail left behind moving objects on a display, caused by pixels that cannot transition between colors fast enough. A pixel told to go from black to white takes time to switch; during that switch, the pixel is still showing the previous frame's color, producing a smeared trail.
The phenomenon is worst on VA panels, which can take 20-30ms to transition between dark grey levels — far longer than the 6.94ms a 144Hz refresh allows. IPS panels are faster but still trail on dark transitions. OLED panels have essentially instant pixel response (under 0.1ms) and never ghost.
Monitor makers combat ghosting with overdrive — pushing extra voltage through pixels to make them switch faster. Too little overdrive leaves ghosting; too much causes inverse ghosting, where the trail becomes a bright halo. The right setting is panel-specific and depends on refresh rate.
How to test
Step 1: Launch the moving block
Click any pattern above. A black block sweeps across the screen at the selected speed.
Step 2: Watch the trail
A clean panel shows a sharp block with no trail. Any visible smear behind the block is ghosting.
Step 3: Try different backgrounds
Switch to a dark grey background. VA panels typically smear much worse on dark transitions than light ones.
Step 4: Adjust overdrive
Open your monitor's OSD and try Normal, Fast, and Extreme overdrive. Re-test after each change to find the cleanest setting.
Step 5: Check for inverse ghosting
If the trail turns bright or cyan, you've overdone overdrive. Back off one notch to eliminate the halo.
Common causes of motion issues
Slow pixel response time
VA panels can take 20-30ms to switch between dark grey levels, leaving visible trails even at 144Hz.
Insufficient overdrive
Without overdrive, pixel transitions lag the refresh rate and produce smear. Normal mode is often too weak.
Excessive overdrive
Too much voltage overshoots the target color, producing inverse ghosting — bright halos behind moving objects.
Refresh rate mismatch
Overdrive tuned for 144Hz may overshoot at 60Hz. Some monitors dynamically adjust; others don't.
Frequently asked questions
Testing tips
- Test on dark grey backgrounds — that's where VA panels really struggle.
- Photograph the trail with a 1/60s shutter to compare panels side by side.
- Tune overdrive per refresh rate; settings that work at 144Hz may overshoot at 60Hz.
- If overdrive can't clean up ghosting, the panel itself is the limit — consider OLED.
Related tools
VA Panel Ghosting: Why Dark Scenes Reveal the Truth
You bought a curved VA gaming monitor for the deep blacks and high contrast, fired up a horror game, and noticed that everything smears when you turn the camera. Dark corridors look like wet paint; distant enemies leave ghostly trails. The monitor's box says 1ms response time, but your eyes say otherwise. Welcome to VA ghosting.
VA (vertical alignment) panels rotate their liquid crystals more slowly than IPS panels, especially between dark grey levels. A transition from black to dark grey can take 20-30ms on a VA panel, while IPS handles the same transition in 5-8ms. At 144Hz, each frame is held for 6.94ms — meaning a VA panel may still be transitioning when the next frame arrives, producing the visible smear.
Manufacturer response time numbers are misleading. The "1ms" on the box is usually MPRT (motion picture response time), a strobing technique, or a best-case grey-to-grey transition. The slowest transitions — typically dark-to-dark — are not advertised and are what cause the visible ghosting. Run our ghosting test on a dark grey background to see your panel's true worst case.
Overdrive helps but doesn't fix the underlying physics. Pushing more voltage through the crystals speeds up transitions, but too much causes inverse ghosting — bright halos behind moving objects. Most VA monitors have Normal, Fast, and Extreme overdrive presets. Tune yours by testing each: start at Normal, increase to Fast, and back off the moment you see bright halos. The sweet spot is usually one notch below where overshoot appears.
Refresh rate matters more on VA than IPS. A 144Hz VA panel holds each frame for 6.94ms versus 16.67ms at 60Hz, which dramatically reduces visible smear. If your VA monitor supports 144Hz or 240Hz, make sure it's actually running at that rate — see our refresh rate test to verify. Many users discover their "144Hz" VA is running at 60Hz out of the box, doubling the visible ghosting.
If overdrive and refresh rate are dialed in and the smearing still bothers you, the panel itself is the limit. The fix is to switch to OLED, which has sub-millisecond pixel response and never ghosts. Run the OLED screen test to see what truly clean motion looks like. VA remains a great value for contrast and price, but for fast-paced gaming, OLED is in a different league.
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