What is Monitor Ghosting?
Ghosting is a display artifact where moving objects leave a faint trail or "ghost" behind them. It occurs because the monitor's pixels can't change colors fast enough to keep up with the movement. This is most common on VA panels (dark level smearing) and older IPS or TN panels.
Overshoot and Overdrive
To combat ghosting, many monitors use "Overdrive." This applies extra voltage to pixels to make them change faster. However, if the overdrive is too aggressive, pixels may "overshoot" their target color, creating a bright or dark glow in front of the moving object (inverse ghosting).
How to Use This Test
- Observe the moving blocks: Look at the edges. A trail behind indicates ghosting. A halo in front indicates overshoot.
- Switch Backgrounds: Ghosting often varies depending on the start and end colors. VA panels typically show more "smearing" on dark backgrounds.
- Adjust Speed: Use the slider to increasePixels Per Frame. Higher speeds make artifacts more obvious.
- Pursuit Camera: If you have a camera, track the movement horizontally to take a clear photo of the ghosting trail.