Last verified 2026-09-13 by ReviewGamers Editorial
A panel advertised at one millisecond can still look blurry in motion. That is not false advertising in most cases — it is that the advertised number describes one part of a process with several.
Two different things
Response time is how quickly a pixel changes from one colour to another. Fast response means less smearing between frames.
Persistence is how long each frame is held visible. Even with instantaneous pixel transitions, holding a frame on screen while your eyes track a moving object produces perceived blur. This is sample-and-hold blur, and it is a property of how the display presents frames rather than how fast the pixels switch.
This is why response time alone does not predict motion clarity, and why two panels with identical claimed response can look noticeably different.
Why the number on the box is not the number you get
Manufacturer response figures are typically best-case measurements under undisclosed conditions — often a specific transition between two particular shades, with overdrive at a setting you may not want to use.
Real transitions between real colours are usually slower, and some transitions are much slower than others. A panel can be genuinely fast on its advertised transition and sluggish on the ones that occur most in actual images.
This is a well-known limitation rather than a scandal, and it is precisely why independent measurement matters more than the specification sheet for this particular property.
Overdrive, and its cost
Overdrive pushes pixels harder to transition faster. It works, and it has a failure mode.
Push too hard and the pixel overshoots its target value before settling, producing inverse ghosting — a bright halo trailing moving objects. That is usually more visually objectionable than the smearing it was meant to fix.
Most panels expose several overdrive levels, and the correct setting is frequently not the highest. It also varies with refresh rate, which is why a setting that looks clean at 144Hz can overshoot badly at 60Hz.
Practical advice: if a new panel looks wrong in motion, try the overdrive settings before concluding it is faulty. This is one of the most common and most fixable complaints.
Why VESA introduced ClearMR
Because refresh rate and response time together were still not telling buyers how clear motion actually looked, VESA introduced the ClearMR programme to describe motion clarity performance in a standardised way, and has since added performance levels to it.
The existence of that programme is itself informative: the industry acknowledged that the two headline numbers were insufficient.
The technology differences
OLED panels have extremely fast pixel transitions, which largely removes smearing. Persistence blur still applies, because it is a function of frame presentation rather than pixel speed.
LCD varies substantially by panel type. Some are genuinely fast; others trade response for other qualities such as colour or viewing angles.
Backlight strobing techniques reduce persistence blur by cutting how long each frame is visible. They can dramatically improve motion clarity and they cost brightness, sometimes introduce flicker, and often cannot run alongside VRR.
What to actually do
- Ignore the advertised response time. It is a best case under undisclosed conditions.
- Look for independent measurement across a range of transitions, not a single figure.
- Check overdrive behaviour at the refresh rate you will actually use.
- Decide whether motion clarity is a priority for you. For competitive play it matters; for slower single-player games it matters much less than contrast and resolution.
- If buying locally, know the return terms — motion artefacts are hard to judge from a product page and obvious within five minutes of use.
What we have not measured
We have not measured response time, overshoot or motion clarity on any display. These require a photodiode-based measurement rig and the panel in hand, and it is not equipment we have.
This is one of the clearest cases where our evidence model requires us to aggregate named laboratories and attribute them, rather than publishing numbers as if they were ours. The framework here is ours; the measurement is not.
