
Originally Posted by
Mistabashi
Input Lag and pixel response time are two completely different things. The response time is the quoted spec of how long the pixels in the panel take to change state (usually grey-grey these days, although there are different methods used sometimes). Input lag is the latency caused by the display's internal image processing, and there's no specification to indicate how good a screen is in this respect - it varies from model to model, and also depending on how much processing is being applied (eg what settings you're using).
Input lag can be a big problem for gaming, which is why a lot of TVs these days have a "game mode", which disables much of the processing to reduce the latency. With computer displays it's less of an issue as they tend to be made with this in mind, although there's still been some models that suffer from it.