On Fri, 2018-12-07 at 14:18 -0500, Paul Koning via cctalk wrote: > Does a plain LCD panel have delay? If not, what about a TV used as a > monitor?
Depends what you mean by a "plain LCD panel". If you mean the glass itself, no, they generally scan synchronously to the input signal and don't have any appreciable delay. But all commercially-available LCD TVs and monitors have at least some input buffering which adds maybe 10ms-30ms of latency in most cases. One frame time at 60fps is 16ms, so if you wait for each picture to be completely scanned in over HDMI before you start scanning it out to the glass then that's going to set your minimum latency. And obviously if the input frame rate is less than 60fps it's possible that the latency may go up. TVs tend to have more picture processing than monitors, and also less market pressure for low latency. But there's very little technical difference between an LCD TV and an LCD monitor. p.