With our change to CalMAN, we will also now be evaluating displays for their grayscale and gamma point. Previously we only targeted a gamma of 2.2 in calibrations but never measured it in the end. Now we will be choosing two targets in our reviews. For light output of 200 cd/m², we will target the same gamma of 2.2 right now. 2.2 gamma is still a de-facto standard, and is the standard for Apple computers and devices as well as video content. For our second calibration we target 80 cd/m² with an sRGB gamma curve. Both of these are specified in the sRGB standard, so those doing professional print or computer graphics work would likely want this.

Hopefully a display will be able to handle both of these tests, and we will also check for the grayscale quality on its own by checking 21 points, just like we do with our tablet and smartphone reviews. This will provide you with more data, as well as consistent data for the different devices.

  Pre-Calibration 200 cd/m² Target 80 cd/m² Target
White Level 201.5 198.4 80.1
Black Level 0.1689 0.1644 0.067
Contrast Ratio 1193:1 1207:1 1197:1
Average CCT 6545 6537 6599
Gamma 2.1648 2.2128 2.4109
Average dE2000 2.3847 0.535 0.6238

Looking at the RGB Balance for the data, the pre-calibration data starts out a bit too-blue, then develops a red tint, before finally winding up with a lack of green at the top of the grayscale. The average CCT remains close to 6503K overall, but the RGB balance shows that there is a lack of correct balance in there. Looking at the post-calibrations numbers for 200 and 80 cd/m², we see almost no deviation at all in the RGB balance, which is much better. The 80 cd/m² results have a bit too much blue perhaps, but overall they're acceptable.

The pre-calibration gamma point is very close to the 2.20 target, but looking at the chart we see some issues. The gamma point rises and falls across the grayscale, which will leads to midtones and highlights not having the correct level of light output, and will lead to a less dynamic image. The overall number is good, but the chart shows that it’s not quite right. The 2.20 target for our 200 cd/m² calibration is much better, with a very linear 2.20 gamma across the whole grayscale. There are a couple small bumps in there, but nothing that would be visible in daily use.

The sRGB target is different, as the gamma isn’t linear across the whole grayscale. Instead the shadows start at 1, and it ramps up as you leave the shadows, which results in an average gamma across the grayscale of 2.40 in the end. Because of this it’s far more important to look at the actual graph than the final number, and here the LG 29EA93 does very well at tracking the target. Once calibrated, the gamma curve for the LG is very good with either sRGB or Power Law targets.

The grayscale dE2000 values takes all of this data into account. Pre-calibration, the dE2000 starts out well in the shadows, but by the end of the grayscale we have dE2000 values above 3, indicating a visible grayscale error that we can see even in motion. The average error is pretty low, but by the end it’s higher than we would like. Post-calibration, both grayscales are free of all visible error. There isn’t a single point that is above 2.0, and no one should be able to see any errors in real world use. In the end, the grayscale is basically perfect for these displays after calibration.

Pre-calibration, the LG 29EA93 is good, but not great. Post-calibration, it’s virtually perfect and will be basically free of visible errors when being used.

Intro, Brightness and Contrast Color Performance
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  • SpartanGR - Friday, April 5, 2013 - link

    No there is no way of knowing. i'll buy this monitor 6 months from now just to be sure.
  • sant2468 - Friday, April 12, 2013 - link

    To get the service menu up, first switch off the monitor, then while holding down the menu key simultaneously press and hold the power button, keep holding both buttons until the monitor powers up then release them. Press the menu button once and up pops the menu. To revert back to the OSD menu, turn the monitor off then back on again.
  • Ubercake - Wednesday, April 17, 2013 - link

    If they can get this to operate at 120Hz, I'd buy it tomorrow.
  • sant2468 - Friday, April 19, 2013 - link

    i have to say. i went for the dell version and it clocks to 75 hz. haven't tried to overclock this any further and it runs so sweat.
    All games run very nice at 75 fps.
  • zewolf5 - Monday, April 22, 2013 - link

    I asked dustinhome if they knew what revision they had for sale. Got this answer: " ...there is new firmwares released now and then. And there shouldn’t be any other difference than the firmware between these revisions, if there is something wrong with the firmware in a product then the customer can contact LG and they will decide if a firmware upgrade can solve the problem. For this product it isn’t possible to upgrade the firmware as a user, it needs to be done by LG Service. And we don’t get any information about which revision we get delivered, since it is delivered on the same part number."
  • Big_Lund! - Monday, April 29, 2013 - link

    Just bought a LG 29EA93-P from Fry's this week (San Jose CA). Mgr date is Feb 13 2013 Rev-01 which is version 1.25. The way to verify is to Hold the power & Menu button's together and you will see the version number on the top left corner! Once calibrated the best monitor to date! Great for games, movies & editing photos.
  • noknowsu - Wednesday, May 22, 2013 - link

    I bought this led monitor because of this new update on the monitor . im am so happy you did this review because it made my decision to buy!! i also got the new revision model 1.25 and bought it off newegg at $540 total they had a special . Thanks anandtech!!
  • MacDavePro - Thursday, May 23, 2013 - link

    Why does the review author continue to be evasive regarding identification of units shipping with the tested firmware revision? Just review a damned retail unit and restore the reputation of AnandTech as a legitimate reviewer. Otherwise this whole review is just a joke. Chris has basically reviewed a mythical, maybe never to be released, one-off that may or may not bear any resemblance to a display of the same name which is available for sale. If I reviewed a Chevrolet stock car as representative of a showroom model you'd laugh me off the web. Joke.
  • retlaps - Monday, June 3, 2013 - link

    i just got mine today, the setting show this:http://i39.tinypic.com/1ij43l.jpg
    Does this mean there is now a Rev 1.31??
  • VooDooAddict - Tuesday, June 4, 2013 - link

    Any idea if the LG 29EB93-P has these updates as well? I'm trying to decide between the LG 29EA93 and the 29EB93-P I would much prefer the nice stand and more professional look of the 29EB93-P but not at the loss of these nessesary updates.

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