View Full Version : What is a Plama set's response time?
RWetmore
02-25-06, 07:58 PM
I see that it isn't listed in the specs. I know it's supposed to be faster than LCD, but how much faster? How does plasma response time compare to CRT? What is typically the response time of a high quality DV CRT set??
Though rare, I have heard some plasma owners state they occasionally notice some motion blur with fast motion.
Thoughts???
jonnythan
02-25-06, 08:20 PM
As I understand it, plasmas refresh their pixels tens or hundreds of times per actual screen refresh, so it's pretty much a moot point.
RWetmore
02-25-06, 08:30 PM
Hmmmm. Is it faster than a CRT? What actually is the response time. I have heard that it isn't always faster than LCD - given today's improvements in LCD response times.
tdavis21484
02-25-06, 10:34 PM
Audioholics listed plasmas as "<8ms" in their new overview, but I think they're just being safe - my understanding is that the response time is less than 1 ms. Some plasmas get accused of having poor response times when it gets confused with lag, which is when the picture takes a little time to be processed before being displayed. However, these are two separate issues - response time is not a problem with plasma. Depending on the processing/scaling involved (dNie, I'm looking at you) it can take a noticable amount of time for the picture to reach the screen and be displayed.
You could probably consider it faster than CRT in a way, since technically, only one little spot on a CRT screen is being refreshed at a time, as the electron beam scans, while plasmas fully refresh constantly. This means no flicker.
RWetmore
02-26-06, 12:57 AM
If response time is never a problem with plasma, then why do some see motion blur???
jedi.night
02-26-06, 08:56 AM
[QUOTE=RWetmore]If response time is never a problem with plasma, then why do some see motion blur???[/QUOTE]
Probably more do to the source than the plasma.
[QUOTE=RWetmore]Hmmmm. Is it faster than a CRT? What actually is the response time. I have heard that it isn't always faster than LCD - given today's improvements in LCD response times.[/QUOTE]
It's not CRT fast, but it is shockingly close. Having testing a number of newer LCD TVs, I can safely say that LCD isn't anywhere NEAR Plasma or CRT response time. DLP is fairly awful as well.
Hedonist
02-26-06, 11:27 AM
From a biological standpoint, I wouldn't worry about any response time <5 ms really as that certainly approaches the biological resolving power of our brain anyway. Most action potentials have a duration of 3-5 ms so anything faster than that will be subject to aliasing within our brians anyway.
RWetmore
02-26-06, 08:51 PM
So it seems no one can actually quote specs. I am getting conflicting information all over the place. Does anyone have any really good references on the subject??
Thanks.
jonnythan
02-26-06, 09:34 PM
"To ionize the gas in a particular cell, the plasma display's computer charges the electrodes that intersect at that cell. It does this thousands of times in a small fraction of a second, charging each cell in turn."
Thousands of refreshses per fraction of a second? Let's say 2000 refreshes per second.
0.5 ms.
vBulletin v3.0.6, Copyright ©2000-2009, Jelsoft Enterprises Ltd.