HP 2311xi IPS Monitor
by Chris Heinonen on August 13, 2012 12:15 AM ESTHP 2311xi - Display Uniformity
Until now, all measurements on the HP 2311xi have been done in the dead center of the screen where we would expect the best performance. The best displays remain uniform across the whole panel and not just the center, so we measure nine spots across the display to see how well it does overall.
Looking at the white level for 200 nits of light output, most of the screen is very uniform given the price. The right side begins to have some drop off, with light output falling off by 15% at the right center location. This isn’t perfect, but it’s still pretty decent as most of the display is very uniform.
Since the uniformity issues with white are typically caused by uneven backlighting we might expect to see something similar with black levels, and we do. They are uniform across the left and center of the display, but then rise again on the right side of the display. This combination is a bit disappointing as lower white levels and higher black levels mean that we will see a lower contrast ratio when we look at that next.
As mentioned, the contrast is very variable across the screen. It ranges from very good on the left side to pretty poor on the right side. The center is right around what we expect from our previous measurements, but the rest of the screen measures from 780:1 on the left to 409:1 in the lower right.
Looking at the color uniformity, here the upper right corner has the largest issue. Since the backlighting is uneven on the right side, that unevenness can lead to a slightly different shade of light being used in that corner, which can lead to the higher dE we see there. Most of the difference is with the grayscale and not colors, which is common. Overall the color errors are very consistent across the display, even if the level of light isn’t as much on the right side, and it performs better than most displays I see pass through my system as far as uniformity is concerned.
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fishman - Monday, August 13, 2012 - link
Sorry, but a 16:9 monitor? Great for a TV, but not for a general purpose computer.kyuu - Monday, August 13, 2012 - link
And here I was hoping we'd get one monitor review without 16:10 snobs popping up...seapeople - Monday, August 13, 2012 - link
Ok, then go buy the 1200p monitor for the same price.Oh wait.
You can't.
risa2000 - Monday, August 13, 2012 - link
I guess I might have googled it, but I wonder why it is not mentioned anywhere? Are there really no other panels than 60Hz nowadays?I am working now on old 19" ThinkVision (excellent LCD, with 75Hz refresh) and 60 to 75 makes difference.
kyuu - Monday, August 13, 2012 - link
Yep, monitors are 60Hz pretty much exclusively nowadays, unless you're looking at monitors meant for 3D that do 120Hz.cheinonen - Monday, August 13, 2012 - link
Unless it is mentioned, I would assume 60Hz for a refresh rate. With the use of an HDMI input, and not specifically being an HDMI input that supports beyond 1080p, it's likely the internal electronics only support a 60Hz input anyway, even if the panel could support higher.Jumangi - Monday, August 13, 2012 - link
Bestbuy has this on sale for $169. Yea its got compramises but for that price the basic display you get is a darn good deal.jaydee - Monday, August 13, 2012 - link
Here are all the 23" IPS monitors that I've seen (there could be more) with features listed. It would be great to to get a roundup of all of them... AT has already reviewed the top two on the list.AOC i2353ph, 1080, DVI/HDMI, no USB, speakers
HP 2311XI, 1080, DVI/HDMI, no USB, no speakers
NEC EA232, 1080, DVI/DP, no USB, speakers
Dell U2312HM, 1080, DVI/DP, USB hub, no speakers
LG IPS231B, 1080, DVI/HDMI, no USB, speakers
LG IPS235V, 1080, DVI/HDMI, no USB, no speakers
EddieBoy - Monday, August 13, 2012 - link
I think this is a good idea. How about putting together a round up of displays so it is easier to compare their pluses and minuses?mikato - Thursday, August 16, 2012 - link
+1IPS monitor roundup! There are so many people out there with their eye on IPS monitors, but since they cost a bit more, these people are careful and do their research. They would definitely like a roundup like this.