Onikage wrote:Hy everybody this is my first post i hope im not bothering anyone i would just want to ask for a help because it seemed to me like a good place to get an answer
Questions are welcome!! No LCD question is too silly to ask about on Blur Busters. People around here know LCD panels well, with an objective mind, and are happy to teach!
Onikage wrote:I have a benq gw2255 monitor and i been having some kind of blur problem or i dont know honestly how could i describe this i never faced with this on my old monitor so basycaly when any kind of motion hapens i can see some kind o blur efect it also looks similiar to ghosting but i dont think its that here is a video so you can see what exactly im talking about
http://www.youtube.com/watch?v=SHf829QcPAc
Aha, that's a quirk of many (but not all) LCD monitors. That's not tearing, but a variant of ghosting. When you get sudden shimmering behaviours like that (intensity changes) of fine patterns during scrolling like that, that's usually caused by the slowness of LCD response, especially when many transitions are asymmetric (e.g. slower transitions between grays versus faster transitions to bright colors). Faster responding LCD's have less of this ghosting behavior -- ones that transitions fast at all grey-to-grey levels, such as recent TN panels.
A good ghosting test is
http://www.testufo.com/ghosting -- and a good page explaining the LCD behaviours is
LCD Motion Artifacts 101 and its companion article,
LCD Overdrive Artifacts.
On many LCD panels, there will often be a ghosting trail behind this UFO
Try adjusting the BENQ AMA settings (a variant of Response Time Acceleration) while viewing the TestUFO ghosting pattern full screen. This will help to an extent, but will not likely solve the problem completely.
All the different types of LCD technologies (TN, VA, IPS) all have their individual pros and cons. The BENQ GW2255 monitor you have is a VA panel, which is known to behave exactly the way you've described (very slow transition to dark colors, fast transition to bright colors). If this is an attribute you really dislike (far more than color quality), then you should be aware that the newer 120Hz TN panels are far less prone to this. You do trade off the great contrast ratios of VA for less contract ratio of TN, and you do less viewing angle of TN (e.g.
http://www.lagom.nl/lcd-test/viewing_angle.php is more problematic on TN panels). It's a trade off.
Also, a very minor factor, but worth mentioning (just in case) -- Panels (especially VA) also tend to ghost a lot less when they're warmed up. LCD response speed is temperature sensitive (ever forgot a cellphone in a car in the middle of the winter? Then you already know what I mean.) and VA panels are especially more sensitive. So they'll ghost a little more when you first turn them on after a cold night, rather than if the monitor has been running all day long.
What model was your old monitor? If it was a TN panel, then you are already familiar with one of TN's advantage: faster response and less ghosting. Some of us cannot stand TN viewing angle limits so VA/IPS panels are widely recommended, but ghosting and motion blur actually bothers some people like me more.
Unfortunately, other than attempting to adjust the overdrive settings, and warming up the monitor, there is no other way to further reduce the attribute you are seeing, short of buying a new monitor. If it's minor, don't worry about it; it's normal for the monitor. If it really bothers you, and you don't mind trading off color/viewing angle to fix this, I highly recommend replacing it with one of the better monitors from the
Official 120Hz Monitor List. Those are generally panels that ghost a lot less than the average LCD. Just make sure to decide what attributes your eyes prefer (better color? less ghosting? etc.)
