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Alexandre Botella Published on October 10, 2011
Translated by Sam McGeever
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  • Screen size 23 inches
  • Panel type TN
  • Resolution 1920 x 1080 pixels
  • Response time 5 ms
  • Inputs (HDMI / DVI / VGA / Component) 1 / 1 / 1 / 0
  • Other details Headphone jack
Just like it did with its televisions, LG has once again abandoned active 3D in favour of passive technology, and this new Flatron D2342 is the manufacturer's first monitor with a polarised display.  It's a 23'' Full HD screen with a TN panel.  It has a HDMI 1.4 input, making it compatible with a large number of video sources, as well as on-the-fly conversion if your content is still in 2D.  Sounds like it's worth testing!

Hardware and features: about average

Despite its 3D compatibility, the D2342 doesn't add any inputs or features you wouldn't usually find on an ordinary 2D monitor.  There aren't any extras like a USB hub or a card reader, and the only stand only allows users to tilt the display it back a few degrees.  In fact, the only way for this monitor to earn any points at all in this section is with its inputs and outputs, which only boil down to VGA, DVI and HDMI connectors and a headphone jack allowing you to pick up the sound that is part of the HDMI signal. 

LG Flatron D2342 review - glasses

The one accessory you will need to enjoy 3D is one of the two pairs of passive 3D glasses that come with the D2342.  The first pair is a normal pair of polarised glasses, while the second pair is extra-large so you can wear them on top of ordinary glasses.  The advantage of using polarised glasses is obvious: they're lighter, more comfortable, and cheaper because they don't have any electronics and therefore don't need a battery.  On the other hand, the vertical resolution is divided in two, leaving it at 1920 x 540 pixels.  In practice, that looks like decent 720p, unlike Full HD 3D which is in 1080p.

Colours: get calibrating

The good news is that this monitor's best colour reproduction comes using the factory settings.  The bad news is that even the best colour reproduction isn't that good.  The deltaE score, or the average discrepancy between the true colours and those actually shown on screen, as measured by our equipment, never gets below 4.6, which is much too high for us to be able to say that this monitor delivers accurate colour reproduction.  If you want to do any better than that, then you'll need to rely on a calibration profile.

LG Flatron D2342 review - colours

The contrast ratio is no better, and only manages 700:1 compared to our average of 850:1. 

Responsiveness: plain old 5 ms TN

Responsiveness is less important on passive 3D displays than on those that rely on active technology.  That's because only problems with polarisation lead to crosstalk, or interference between the video feeds designed for the left and right eye.  Fortunately for the D2342, that isn't a problem here.

LG Flatron D2342 review - responsiveness
This graph shows the ghosting time, measured in ms, that the monitor takes to entirely remove the previous frame. The shorter the time, the more fluid moving images will appear

But as you might imagine from reading the specs, this 23'' monitor isn't one of the models we'd recommend for gamers—or anybody else who's doing anything with fast-moving objects on the screen.  Because it's so unresponsive, almost any moving objects end up looking blurry.

Input lag is much better, but the gap between the video signal leaving the source and being shown on the screen is low enough to be invisible to the naked eye.

3D Quality: good fun, if you're on your own

There's nothing earth-shattering about the 2D-to-3D conversion, but if you connect the D2342 to a genuine 3D source, the results are remarkable.  You do, however, have to be careful about two things: you need to be facing the screen directly, and also sit far enough back.  In our experience, that means being somewhere between 90 cm and 130 cm away from the display.

LG Flatron D2342 review - 3d quality

It doesn't really matter whether you're to the left or right of the display, but the size of the screen means that getting it at the right height is important if you don't want crosstalk to ruin the fun when you're watching Blu-ray 3D discs.  That makes it rather tough to fit more than one person in front of the screen.

And we advise making sure you're far enough back because we found we couldn't notice the 3D when we got too close.

The long response times mean that this monitor is no better in 3D than it is in 2D with fast-moving objects, so we think it's best not to try it with games and instead stick to 3D films.
If you really want to enjoy movies on this monitor, you need to do two things. First of all, you should leave upscaling SD content to specialist software or an external device. Secondly, you need to turn the brightness down as much as you can so you can avoid seeing the snowstorm effect in darker areas. Even then, it doesn't disappear totally.


  • Not much crosstalk if you're in the right place
  • Affordable for a 3D display
  • Lightweight glasses


  • Colours aren't accurate
  • Below average contrast
  • Not responsive enough for gaming
  • Viewing angles are tight for 3D


The LG Flatron D2342 is a great monitor for office work, but is also perfect for enjoying a Blu-ray 3D. But it's only fun if you're on your own, because the viewing angles are so narrow that anybody sitting next to you won't be able to see in 3D.
3 LG Flatron D2342 DigitalVersus 2011-10-10 00:00:00
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