"Display lag" for LCDs?

[CadetLee]

On another forum, someone's telling me that LCDs are inferior for online gaming because there is a "display lag" (not response time)..quote:

I didn't say response time. I said Display Lag. There's a difference. And online is different because when you're online, you notice a difference between 50 and 100ms pings, 100 and 200 ms pings. Add another 50ms on for your display lag and it seems even worse.

Did I forget to learn something?

[ImaNihilist]

LOL!

Ok, here is the deal with "display" lag. First off, it doesn't occur at native resolutions ( I don't believe). Second, it's really only even *possibly* noticeable with consoles on HDTVs.

It's like this. Say you have an XBOX 360, and a HDTV that's only capable of 480p or 1080p, but not 720p which is the native resolution for XBOX 360 games. Now, the signal either has to be up converted, or down converted. This takes a short time. It's no where near 50ms though. It's pretty much something that is so close to zero on most TVs, it can be considered zero. Some people might be able to see it, depeding on the TV.

This is one of the issues with PS3 and the idea of supporting 1080p as a native resolution because almost NO ONE has an HDTV capable of that resolution. Even in this case though, no big deal.

Other than that, there is no such thing as "display" lag that I know of.

[Transfurzz]

I think the guy in question is confused.

What the hell is display lag.

Edit: The guy isn't talking about ghosting. He's actually talking about lag. A drop in FPS per se.

Though where he got the idea that your ping online is related to your LCD beats me.

Lee it would be nice if you could provide a link to the thread in question. I would really like to see whats this all about.

[soupnazi]

I do notice a very slight input lag on my Dell2405fpw in CS. It feels like mouse filtering/smoothing is enabled. When you quickly turn, you can feel it isn't exactly instant. (it's quite hard to notice and it doesn't bother me) Some LCD's are more suceptible and I think has to do with overdrive and refresh rates.

Example
http://personal.testdata.com/CrtLcdComparo.wmv
http://www.stud.tu-ilmenau.de/~maei1ii/p20bilder/
http://www.hardforum.com/showthread.php?p=1027632791

[Transfurzz]

Ahh, input processing ! Well that sheds some light.

By Gustep12

SIGNAL LATENCY can be thought of the time that an electrical input takes from the time it is requested at the "input" to the time it is done being processed digitally and finally executed at the "output". This is always present whenever digital components are involved, for example in digital receivers, LCD screens, Dolby Digital amplifiers, etc, and is often in the range of 30ms.

Analog CRT and analog audio amplifiers respond more or less in "real time" to their inputs (less than 0.05ms), because there is no way of storing and delaying the data - it has to be outputted, or else it is lost (due to "limited bandwidth", but here analog bandwidth is meant, e.g. what frequency can still be reproduced).

On the other hand, digital components like LCDs and dolby digital receivers first need to do some processing on the digital data that they have received. It is buffered, sent through some CPU cycles on the component's DSP, and finally D/A converted to drive the pixel or the actual speaker. All this takes a bit of time. Hence there is always some signal latency, and it seems to be particularly big on the 2405fpw. They should give it faster electronics, i.e. a faster DSP chip to take care of the scaling and input signal execution. I bet this is where some of the comparable but much more expensive 24" LCDs have their competitive edge.

Taken from here. Soup's Link.
http://www.hardforum.com/showthread....4&page=2&pp=20



Think thats what he's talking about. Wondered why he was talking about online, ping and stuff. Nothing we actually don't know about.