BenQ VW2420H Monitor Review
by Chris Heinonen on December 10, 2011 2:45 AM ESTUniformity and Gamut
When we looked at the color on the VW2420H, the dE number for the very center of the panel at 200 nits of brightness was pretty decent at right around 2.0. Unfortunately it seems that the center of the panel performs better than the rest of the panel as a whole. The center and top-middle of the display are right around 2.0 for their average dE, but the rest of the panel is closer to 3.0 or higher. For this reason if you are doing color sensitive work, you probably want to keep what you are working on in the center of the screen and use the edges of the screen for other things.
When I looked at the raw data for the uniformity values, aside from the center point the white values were much worse across the display. When we look at the brightness uniformity we can clearly see why that is. While it is a bit odd that the bottom-middle has the 2nd most accurate brightless level but the top-middle has the 2nd most accurate color dE, overall you can see the correlation between dE and brightness uniformity. As the light level changes, the color accuracy of white and everything else drifts from the calibrated values. This uniformity issue will exist with almost any panel using conventional lighting techniques.
The black level uniformity is a little bit better than the white uniformity, but since this doesn’t have the same level of effect on dE levels that white uniformity does, we are less concerned with it. The higher numbers in the corners could be due to light leakage around the edges of the display, which often happens, but the standard deviation for all the measurements is just 0.002 nits, so I’m not concerned with this at all.
The BenQ offers up a gamut that is in the sRGB colorspace and testing bore that out, showing that is occupies just over 71% of the Adobe RGB gamut as we would expect. There's nothing really surprising or different here, as if you want the full Adobe RGB gamut you’ll need to look for a different backlighting system.
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jigglywiggly - Saturday, December 10, 2011 - link
stop doing these cruddy display reviewsdo more 120hz reviews
snuuggles - Saturday, December 10, 2011 - link
+1This is a high-end site. I'm not clear on why anyone here would buy anything but either:
1. an excellent s-ips screen
2. 120hz input screen
Also, Chris, please do not encourage people here to purchase a "3d" TV as a monitor. As you *must* know, there is no TV on the market today that can accept a 120hz signal and display it, and most TVs have *horrible* input lag. To even suggest that a 3d tv is an acceptible monitor is to further confuse an already confused public.
DanNeely - Sunday, December 11, 2011 - link
For the most part sites review what vendors send them for review.gmkmay - Saturday, December 10, 2011 - link
Just out of curiosity why would you review this when you already reviewed the EW2420? They use the same panel with just slight differences in inputs and presentation. The time spent reviewing this seems like it would have been much better spent reviewing the 750d Samsung TN 120hz monitor that you've said was forthcoming.cheinonen - Sunday, December 11, 2011 - link
BenQ provided both and I reviewed both of them. The Samsung is coming very, very soon.jmunjr - Saturday, December 10, 2011 - link
Same old story. LCD makers, if you keep making 16:9 LCDs many of us will run the other way... We don't care if it is cheaper, we want better.seapeople - Saturday, December 10, 2011 - link
I want 16:16 aspect ratio, I really like my vertical space. Actually, I'd prefer something like a 9:16 aspect ratio, but I just don't think we'll ever get there.Penti - Saturday, December 10, 2011 - link
Haha, you mean you like to pivot your screen? Just do it.JediJeb - Saturday, December 10, 2011 - link
With the lack of VESA mounts these days most monitors won't pivot unless you tear them apart and use some sheet metal screws to mount them to a post.TegiriNenashi - Monday, December 12, 2011 - link
Yes pivot that 16:9 screen to see how ridiculously narrow it is.