NEC EA244UHD Review
by Chris Heinonen on August 7, 2014 2:30 PM ESTAdobeRGB Test Bench
Pre-calibration the NEC AdobeRGB preset is still good but not great. Unlike sRGB the grayscale has a blue-tint instead of a red one. The gamma has the same roll-off in it, and I expect we will see this a lot going forward. Color Checker and Saturations are both very good pre-calibration with most of the issues at the lower light output levels due to some gamma issues. The color points also seem to indicate that we have the full AdobeRGB gamut here.
| Pre-Calibration |
Post-Calibration, 200 cd/m2 |
Post-Calibration, 80 cd/m2 |
|
| White Level ( cd/m2) | 200.35 | 200 | 78.5 |
| Black Level ( cd/m2) | 0.292 | 0.2966 | 0.1152 |
| Contrast Ratio | 686:01:00 | 674:01:00 | 681:01:00 |
| Gamma (Average) | 2.05 | 2.23 | 2.6 |
| Color Temperature | 6750K | 6687K | 6451K |
| Grayscale dE2000 | 2.8 | 0.79 | 1.44 |
| Color Checker dE2000 | 1.53 | 0.64 | 1.09 |
| Saturations dE2000 | 2.01 | 0.77 | 1.43 |
Post-calibration at 200 cd/m2 the grayscale moves to being almost perfect. The gamma is very flat and virtually every grayscale point has a dE2000 below 2.0. The color checker average has fallen to 0.644 and the saturations dE2000 has fallen to 0.77 on average. Again the post-calibration numbers for 200 cd/m2 are just about perfect.
Calibrating to 80 cd/m2 the results are just like sRGB: very good but not as good as 200 cd/m2. Everything is improved, from grayscale to colors, and it measures very well. There isn’t too much to say when there aren’t any large performance issues to be found.
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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...