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.
Response time measures the duration for a pixel to transition from one color to another, expressed in milliseconds (ms). Two metrics: GtG (Gray-to-Gray) transitions between mid-tone grays — simpler to test, manufacturer-preferred; and MPRT (Moving Picture Response Time) — perceptual human-eye latency measuring how long motion blur persists while viewing moving objects. OLED pixels transition in <1 ms inherently (physically instant pixel turn-on/off). LCD pixels use liquid crystals requiring voltage ramp, typical 2–5 ms GtG.
**How response time affects perceived motion technically:** At 60 Hz, each frame persists 16.67 ms. If pixel response is 5 ms, the pixel spends 5 ms transitioning, then 11.67 ms at final color. A moving object "trails" by appearing in its previous position (ghosting). At 144 Hz (6.94 ms per frame), a 5 ms response causes more overlap — object appears to trail 70% of a frame. Overdrive (LCD technique) over-voltage the crystal to speed transition but risks overshoot (pixel overshoots target color). OLED has inherent speed advantage: pixels turn on/off via light emission, no mechanical transition needed.
**Why it matters to buyers:** Slow response (>10 ms) creates visible ghosting trails in gaming or fast scrolling. Competitive gamers (esports) prioritize sub-1 ms response + high refresh rate combo. Casual gamers fine with 5 ms. Video/photo editing: response time irrelevant (static content). Business/office use: unnoticeable above 5 ms. OLED's <1 ms response is premium advantage but more costly than LCD.
**What to look for / common pitfalls:** - GtG metric: manufacturer-quoted, varies by transition type - 1 ms GtG (gaming LCD): excellent, achieved with overdrive - 2–5 ms GtG: acceptable for gaming - 10+ ms GtG: visible ghosting, suitable only for static content - MPRT (perceptual): more relevant to human vision than GtG specs - Overdrive risk: excessive overdrive causes color overshoot/artifacts
Real-world 2026: OLED gaming phones (OnePlus 12, <1 ms inherent), 240 Hz gaming monitor with 1 ms GtG (ASUS ROG, BenQ), Apple iPad Pro OLED (subpixel <1 ms), office LCD monitor 5–10 ms (imperceptible lag).