MonitortureMonitor smearing, ghosting & burn-in explained
The image faults people notice on monitors almost all trace back to the panel technology and how fast its pixels change. Here is what each artifact looks like, what causes it, which panels show it, and how to reduce it.
| Artifact | Mainly affects |
|---|---|
| Ghosting & inverse ghosting | LCD (VA, IPS, TN); emissive panels are effectively immune |
| Black smearing | VA panels most of all |
| Persistence blur (sample-and-hold) | All panels, including fast OLED |
| Burn-in & image retention | OLED (organic panels); LCD — including mini-LED — does not suffer organic burn-in |
| VRR flicker (gamma flicker) | OLED especially, with variable refresh rate (G-Sync / FreeSync) |
| IPS glow & backlight bleed | IPS most visibly; any backlit LCD can bleed |
Ghosting & inverse ghosting
Mainly affects: LCD (VA, IPS, TN); emissive panels are effectively immune
- What you see.
- A faint trailing copy follows a moving object (ghosting), or a bright halo runs ahead of it (inverse ghosting / overshoot).
- Why it happens.
- Pixels take time to finish changing color. If a pixel has not settled before the next frame is drawn, the old image lingers as a trail. Monitors fight this with “overdrive”, which pushes pixels harder to change faster — but too much overdrive overshoots the target shade and leaves a bright inverse-ghost halo instead.
- How to reduce it.
- Set the monitor’s overdrive / “response time” control to the level that is clean at your actual refresh rate (one setting rarely suits every rate). Higher refresh rates also shorten the window each frame is shown, hiding residual trails.
Black smearing
Mainly affects: VA panels most of all
- What you see.
- Dark objects moving over dark backgrounds leave a muddy, delayed trail — text scrolling on a dark page, or shadows in a dark game.
- Why it happens.
- It is ghosting’s worst case on VA: the vertically-aligned crystals are slowest to change when moving between dark shades, so dark-to-dark transitions lag the most. It is the direct trade-off for VA’s excellent contrast.
- How to reduce it.
- Largely inherent to VA. A better overdrive tune helps a little; if fast dark-scene motion is critical, an IPS or emissive panel avoids it.
Persistence blur (sample-and-hold)
Mainly affects: All panels, including fast OLED
- What you see.
- Moving content looks softly blurred even on a panel with near-instant pixel response — the reason 60 Hz OLED still blurs in motion despite ~0 ms response.
- Why it happens.
- Your eyes track a moving object smoothly, but each frame is held static on screen for the whole refresh interval. Your eye moves while the image does not, smearing that frame across your retina. This is about how long each frame is shown, not how fast pixels switch — so instant-response panels still show it.
- How to reduce it.
- Raise the refresh rate (each frame is held for less time) or use backlight strobing / black-frame insertion (BFI), which blanks the screen between frames at the cost of some brightness.
Burn-in & image retention
Mainly affects: OLED (organic panels); LCD — including mini-LED — does not suffer organic burn-in
- What you see.
- Static elements — a taskbar, HUD, logo or channel bug — leave a faint permanent ghost after long exposure. Temporary retention fades on its own; true burn-in does not.
- Why it happens.
- OLED pixels are organic and age with use. Areas driven bright and unchanging for hundreds of hours wear faster than their neighbours, so the difference eventually shows as a fixed pattern.
- How to reduce it.
- Use pixel-shift and logo/taskbar dimming, auto-hide the taskbar, vary content, run the panel-refresh / compensation cycle, and avoid leaving a static bright image on screen for hours. Inorganic LCD panels (including mini-LED) sidestep it entirely.
VRR flicker (gamma flicker)
Mainly affects: OLED especially, with variable refresh rate (G-Sync / FreeSync)
- What you see.
- Brightness flickers or “pumps” in dark scenes and on loading screens when the frame rate swings up and down.
- Why it happens.
- A pixel’s brightness depends slightly on how long it is held between refreshes. When frame times change rapidly under VRR, near-black shades shift brightness with them, and the eye reads that as flicker. OLED’s near-instant pixels make the shift more visible than on LCD.
- How to reduce it.
- Cap the frame rate to keep frame times steady, keep it in the VRR range, and apply any firmware fixes the maker ships. Some users disable VRR for the worst offenders.
IPS glow & backlight bleed
Mainly affects: IPS most visibly; any backlit LCD can bleed
- What you see.
- A silvery angular glow washes the corners over dark content (IPS glow), and light leaks around the panel edges (backlight bleed).
- Why it happens.
- A backlit LCD cannot fully block its always-on backlight. IPS glow is angle-dependent — it shifts as you move your head — while bleed is fixed leakage around the edges and varies unit to unit. Emissive panels have no backlight, so neither occurs.
- How to reduce it.
- Sit more square-on and a touch further back, lower brightness in dark rooms, and add some bias lighting so raised blacks are less obvious. Severe bleed can be a warranty matter.
The short version: ghosting and smearing are about pixel response (slow on VA, worst in the dark; fast on IPS; near-instant on emissive panels). Persistence blur is about refresh rate and affects every panel. Burn-in and VRR flicker are OLED’s to manage, the price of its perfect blacks. Matching the panel to how you actually use the screen is what keeps these from ever bothering you — start with the panel-types comparison.