Market improving for monitors?

Phil Blundell pb at pbcl.net
Fri Dec 7 13:36:32 CST 2018


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.



More information about the cctalk mailing list