OLED Motion & Dark Transition Test
OLED subpixels switch states almost instantaneously, but near-black transitions (e.g. 0% to 5%) can occasionally exhibit transient overshoot flashes. Evaluates Black-Gray, Gray-Black, and moving dark objects.
Technical Scope & Limitations
Visual motion inspection. Does not claim physical subpixel response time in milliseconds (sub-ms).
Browser rendering output can be influenced by OS display scaling, GPU driver color settings, and active HDR profiles.
- Track the moving objects with your eyes across the dark backdrop.
- Observe the leading and trailing edges of the objects.
- Look for bright inverse flashes ("near-black overshoot") on dark-to-light transitions.
- Adjust velocity between 480 px/s, 960 px/s, and 1440 px/s.
What This Test Checks
- Emissive pixel response on dark-to-light transitions (0% to 5% or 10%).
- Near-black overshoot flashes where pixels momentarily spike in brightness before settling.
- Sample-and-hold persistence blur caused by human eye tracking.
How to Perform the Test
- Follow the moving UFO pattern with your eyes.
- Focus on the leading and trailing borders of the moving object.
- Adjust velocity between 480 px/s, 960 px/s, and 1440 px/s.
- Observe if sharp white halos or flashes trail behind the object.
What to Look For
- Bright white or colored flashes on trailing edges indicate near-black chrominance overshoot.
Common Display Problems & Diagnostic Guidance
OLED Sample-and-Hold Blur
Even with near-instant 0.1ms pixel response times, OLED screens display motion blur at 60Hz and 120Hz due to eye-tracking across static frames (retinal persistence).
Frequently Asked Questions
Can this test measure sub-millisecond response times?
No. Visual tests evaluate perceived clarity with human eyes. Accurate millisecond response time figures require a specialized optical photodiode and oscilloscope.