Response time is how fast a pixel can change color, measured in milliseconds. Lower response times reduce motion blur and ghosting in fast-paced video and gaming.
Common metrics: GtG (gray-to-gray, manufacturer-preferred, optimistic), MPRT (moving picture response time, perceptual), and full transition time.
OLED panels achieve <1 ms response time inherently (instant pixel response). High-end gaming LCD monitors reach 1 ms GtG with overdrive. Standard office monitors often quote 5 ms GtG.
At 144 Hz refresh rate, each frame holds for 6.94 ms — so anything under 5 ms is generally adequate. Below 1 ms benefits primarily competitive esports.