NEC EA244UHD Review
by Chris Heinonen on August 7, 2014 2:30 PM ESTDisplay Uniformity
As I mentioned earlier, I think giving up some contrast ratio to get better uniformity is worth it for the NEC EA244UHD. When you are a graphics professional, one of the major targets for NEC here, having what you see in one area of the monitor look the same as another section is essential.
NEC has delivered here with the EA244UHD as it has some of the best uniformity I have seen to date. On the white uniformity test, the largest error is +/- 6.8%. I usually consider 10% to be excellent and 15% to be good, so this is very good. It is a shift that is barely visible to the naked eye, if visible at all. You really don’t need to be concerned about the brightness uniformity.
Black Uniformity isn’t as good due to a bright corner in the lower-left. The top of the screen is actually darker which lets it have a better contrast ratio, but the lower left is the main issue here. That’s the only spot that is really bad so this is still good overall for black uniformity.
The contrast uniformity is very good overall except for the lower-left corner. Take that away and we see the main contrast issues is that it gets better at the top, not worse.
The big story is the color uniformity. Since this test includes the brightness and color gamut, it really measures everything at once. Here there is not a single point with a dE2000 over 2.0. You can see that everything is a dark green indicating almost perfect performance. What you see at the center of the screen, or anywhere else, is going to be the same as another point on the screen. This makes the NEC EA244UHD an ideal display for media work.
With these uniformity results I think the trade-off of contrast for uniformity is worthwhile. It might make the display worse for watching a movie, but it makes it much better for the kind of work that is going to be done on the NEC EA244UHD.
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willis936 - Thursday, August 7, 2014 - link
I think a better solution than the chroma subsampling to achieve 4k60 today would be to use two connectors and stitch the picture together at a high level. It would take bigger buffers on the display and some additional circuitry but there's no reason a display driver couldn't pull this off with existing hardware. 4k60 is already the high end so I don't see why corners need to be cut, especially when displays like this tick all of the feature boxes and come with a bajillion different connectors.NECDisplaySolutions - Friday, August 8, 2014 - link
Hello. This can be done on the EA244UHD with the Picture by Picture modes, either 2, 3 or 4 way. A 4-way Full HD configuration over HDMI and DVI would give you 60 Hz support. Or you could just use 1 DisplayPort cable.marcosears - Thursday, October 9, 2014 - link
This is a nice try from NEC, but it just doesn't meet the standards of some of the really good monitors on the market today. /Marco from http://www.consumertop.com/best-monitor-guide/fpsdean - Friday, October 9, 2015 - link
LOL! TN panels are garbage! Watch what garbage you post -- none of those monitors are even good.gevorg - Thursday, August 7, 2014 - link
Does it use PWM? If yes, at what brightness levels?http://www.tftcentral.co.uk/articles/content/pulse...
kepstin - Thursday, August 7, 2014 - link
This is an LED-backlit model, so it almost certainly uses PWM for backlight control. I'd be interested to know what frequency it runs at.xenol - Friday, August 8, 2014 - link
Not every LED backlight uses PWM.NECDisplaySolutions - Friday, August 8, 2014 - link
Hello. The PWM frequency on this monitor is 23kHz. You can see all of the product specifications for the EA244UHD here: http://www.necdisplay.com/p/desktop-monitors/ea244...Ahriman4891 - Thursday, August 7, 2014 - link
PWM frequency is 23kHz, mentioned in this press release: http://cinescopophilia.com/nec-4k-24-inch-multisyn... and confirmed by a NEC rep on hardforum.NECDisplaySolutions - Friday, August 8, 2014 - link
You are correct. The PWM frequency on this monitor is 23kHz. You can see all of the product specifications for the NEC EA244UHD monitor here: http://www.necdisplay.com/p/desktop-monitors/ea244...