OLED Screen Test
OLED-specific testing in 20 minutes. Detect burn-in, evaluate ABL and PWM dimming, verify black uniformity, and find black crush before it ruins your content.
OLED Screen Test
OLED-specific testing → burn-in detection, ABL evaluation, black uniformity, and leveraging OLED's strengths while checking for weaknesses.
Dead Pixel Test
Cycle solid colors to expose dead OLED pixels (pure black on bright fields).
Burn-In Test
Detect persistent image retention from static UI elements — the top OLED risk.
Backlight Bleed Test
Verify black uniformity — OLED should show zero bleed, any glow is a defect.
Color Accuracy Test
Verify Delta-E versus DCI-P3 reference swatches and detect color drift.
Color Gamut Test
Map coverage of DCI-P3 and Rec.2020 triangles — OLED typically excels here.
Greyscale Test
Spot black crush and near-black tint — common OLED weakness from aggressive dimming.
Refresh Rate Test
Confirm 120Hz is active and detect VRR flicker — an OLED-specific artifact.
Ghosting Test
Verify instant response time and detect inverse ghosting from overdrive.
Why You Need OLED Screen Testing
OLED panels offer infinite contrast, instant response time, and perfect black levels — but their unique physics create unique defects. Burn-in from static UI elements is permanent and the leading cause of OLED returns. ABL (Auto Brightness Limiter) dims large bright fields, making fullscreen HDR content look dimmer than small-window HDR. PWM dimming at low brightness can cause eye strain in sensitive users. And aggressive factory calibration can crush near-black detail, hiding the very shadow information that OLED's true blacks are supposed to reveal.
Used OLEDs require extra scrutiny. Burn-in accumulates over thousands of hours and cannot be reversed — only slowed. A used OLED with visible burn-in should be priced accordingly or rejected outright. New OLEDs benefit from immediate testing to document the pristine state for warranty claims and to verify that the pixel refresh / panel calibration features are working. Run the dead pixel test first, then the burn-in test on a mid-grey field, then the black uniformity test — any glow on OLED black is a defect, not a feature.
8-Step OLED Inspection Flow
The OLED flow replaces backlight bleed with black uniformity (purple) — on OLED, any glow on a black field is a defect, not normal bleed. Start with the dead pixel test (red) to find dead sub-pixels (pure black on bright fields), then run the burn-in test (orange) on a mid-grey field to expose persistent ghost images from static UI. Black uniformity (purple) confirms the panel has zero light leak — OLED pixels turn off completely, so any glow indicates a defect. Color accuracy (green), gamut coverage (pink), and greyscale ramp (gray) follow, with special attention to black crush in the darkest 5-7 steps. Refresh rate (cyan) and ghosting (blue) round out the inspection — OLED response is instant, but VRR flicker is an OLED-specific artifact to watch for. Total time: about 20 minutes.
OLED Parameter Glossary
Burn-in
Permanent image retention caused by uneven pixel wear. Static UI elements like channel logos, taskbars, and HUDs age the panel faster than surrounding pixels.
ABL (Auto Brightness Limiter)
Circuit that reduces OLED brightness for large bright fields to prevent power overload. Causes fullscreen white to look dimmer than small white windows.
PWM Dimming
Pulse-width modulation used to dim OLED panels. Low-frequency PWM (under 240Hz) can cause eye strain; high-frequency or DC dimming is gentler.
Black Crush
Loss of detail in near-black content caused by aggressive dimming or panel calibration. OLED's strength (true black) can become a weakness if shadows crush.
VRR Flicker
Brightness fluctuation when variable refresh rate is active at low frame rates. An OLED-specific artifact, most visible in loading screens and menus.
OLED Panel Type Comparison
| Panel | Strengths | Weaknesses | Best For |
|---|---|---|---|
| WOLED | Mature tech, lower cost | Lower color volume, ABL aggressive | Movies, general use |
| QD-OLED | Higher brightness, wider gamut | Premium price, still burn-in risk | HDR, gaming |
| Micro-OLED | Tiny pixels, high PPI | Small sizes only, expensive | VR/AR headsets |
| Mobile AMOLED | Efficient, bright, flexible | Burn-in from status bar | Phones, smartwatches |
Return/Exchange Guidelines
- Test burn-in immediately on used OLEDs — it's permanent and cannot be reversed. A used OLED with visible burn-in should be priced accordingly or rejected.
- Photograph burn-in on a mid-grey field. Static-element ghosting from status bars, channel logos, or HUDs is the most common ground for exchange.
- Check the manufacturer's burn-in warranty. LG G-series, Sony A95L, and Samsung S95D include 1-2 year burn-in coverage; older or budget OLEDs may not.
- Run pixel refresh / panel calibration cycles before declaring a defect — some apparent burn-in is actually temporary image retention that the refresh cycle clears.
Frequently asked questions
Testing tips
- Run pixel refresh / panel calibration cycles weekly — they reset pixel voltages and slow burn-in progression.
- Enable screen shift / logo dimming features. They reduce static-element wear and extend panel life significantly.
- Vary your content. Mix full-screen video with static UI use to spread pixel wear evenly across the panel.
- Avoid Vivid or Dynamic modes at max brightness — they accelerate burn-in. Use Cinema or Filmmaker mode for daily use.
Related guides
OLED Screen Test: Burn-in, PWM, and Black Crush Detection
OLED panels offer the best picture quality of any display technology — infinite contrast, instant response time, perfect black levels, and wide viewing angles. But the same physics that produce those strengths also create unique defects. Burn-in from static UI elements is permanent and the leading cause of OLED returns. ABL dims large bright fields. PWM dimming at low brightness can cause eye strain. Aggressive factory calibration can crush near-black detail, hiding the very shadow information that OLED's true blacks are supposed to reveal. A 20-minute OLED-specific inspection surfaces every common defect before your return window closes.
Start with the dead pixel test. On OLED, dead pixels show as pure black on bright color fields — the pixel's transistor has failed and it cannot emit light. Cycle through red, green, blue, and white. Any pure black dot is a defect; document it with photos and request an exchange under the manufacturer's pixel policy.
Burn-in is the next priority — the top OLED risk. Open the burn-in test and display a mid-grey field. Burn-in shows as faint persistent ghost images from the status bar, channel logos, taskbars, or HUD elements. Temporary image retention looks similar but fades after a few minutes; run a pixel refresh cycle (LG, Sony) or panel calibration (Samsung) and re-test to confirm. If the ghost image remains, it's permanent burn-in and the panel must be replaced.
Verify black uniformity with the black uniformity test. On OLED, any glow on a black field is a defect — every pixel should be completely off. Move on to color with the color accuracy test and color gamut test; OLED typically excels here, covering 90%+ DCI-P3. The greyscale test is critical for detecting black crush — if the darkest 5-7 steps of the ramp look identical black, raise the brightness setting or switch to Cinema mode. The refresh rate test confirms 120Hz and reveals VRR flicker, while the ghosting test verifies instant response time. Photograph anything suspicious with a timestamp; OLED warranties explicitly cover burn-in on premium models, and evidence turns a borderline return into an approved exchange.
Test your OLED screen now
Free, no download, runs in any browser.
Browse all tools