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31" Class 17:9 Digital Cinema 4K IPS LED Monitor (31" Diagonal)

  • 31MU97-B

Key Features

  • Digital Cinema 4K Resolution
  • IPS Display with Adobe RGB over 99.5%
  • Total Color Management
  • 10-Bit Color Depth
  • DCP-P3 Digital Cinema Color Standard
10-Bit Color Depth (1 billion colors)

10-Bit Color Depth (1 billion colors)

10-bit color depth that supports over 1-billion colors is 64 times richer than an 8-bit color display, re-creating colors softly and naturally without color banding. Now, all the details are right before you with the richer and wider color range that enables accurate, detailed, and natural-looking images. Also, with smoother transition in gradients, the more shades in between let you work with images in more detail.

IPS Display with Adobe RGB over 99.5%

IPS Display with Adobe RGB over 99.5%

By supporting Adobe RGB over 99.5% on the IPS Display, the 31MU97 minimizes color difference and color loss with the wide color gamut and color temperature that covers both the sRGB and CMYK color range. As a result, one can effortlessly retouch and image photos to create final products with vivid and vibrant colors that VA or other LCD panels cannot deliver.

DCP-P3 Digital Cinema Color Standard

DCP-P3 Digital Cinema Color Standard

Editing on-site footage with the full color expression is possible with the 31MU97’s DCI color standard support which reproduces digital
content color just like what you intended with the preview camera on site. Allows for accurate conditions such as shadow detail, color,
saturation, and brightness for finer editing and overall control in the post production stage.

Digital Cinema 4K Resolution

Digital Cinema 4K Resolution

The 31MU97 delivers 4K (4096 x 2160) resolution across a 31” display, providing crisp images with a significant amount of pixels on screen. 4K(4096 x 2160) resolution displays over four times the resolution of standard 1920 x1080 FHD, and over half a million more pixels than UHD resolution(3840 x 2160) which makes you view even the finest details clearly to carry out intricate work for higher quality output.

Dual Color Space

Dual Color Space

Compare the work done using both color modes simultaneously - half of the screen in one mode and the other half in another - color distortion and maintaining the original resolution are no longer a concern when it comes to output. With Adobe RGB and sRGB side-by-side, you can get an idea of how the final printable will look like with Adobe RGB mode and also can find out how the final output will be on websites with the sRGB mode at once.

Total Color Management

Total Color Management

Through detailed color calibration testing, the 31MU97 maintains the color standard with software calibration and a factory preset, minimizing differences in color space and expressions between the original images, monitor screen, and printed result.

MAXXAUDIO® + 5W Speakers

MAXXAUDIO® + 5W Speakers

With two internal 5W speakers and the MAXXAUDIO® functions,
there is no need for separate high-end monitoring speakers. The 31MU97 which supports MAXXAUDIO® delivers high quality sound with a wide range of vibrant, crisp, and clean high and low sounds while reviewing or editing 4K contents.

Pivot / Height Adjustment

Pivot / Height Adjustment

The 31MU97’s pivot function enables you to not reduce size of photos or drag and scroll the vertically long photos all the way down any more. It also lets you could rotate origin pictures up to 90° depending on the ratio of the work space, giving you the perfect conditions to work under. By activating pivot function on your needs, 31MU97 allows fast and efficient work without any discomfort.

Screen Size 31"
Screen Size Class (diagonal) 31" Class (31" diagonal)
Panel Type IPS
Color Gamut (CIE1931) AdobeRGB 99.5%
Aspect Ratio 17:9
Resolution 4096x2160
Contrast Ratio(Original) 1M:1 (DFC)
Viewing Angle (CR≥10) 178/178
Surface Treatment Advanced Anti-glare
USB 3.0 4
Headphone Out 1
Display Port 1
Mini DisplayPort 1
Type Built-in Power
Input 100~240V, 50/60Hz
Power Save/Sleep Mode (Max.) 1.2(USB3.0)
Pivot Stand Yes
True Color Pro (S/W) Yes
PC Yes
PBP (Picture by Picture) Yes
Plug & Play Yes
Factory Calibration Yes
Picture Mode Yes
Screen Split (S/W) Yes
Without Stand (WxHxD) 29" x 2.1" x 16.04"
With Stand (WxHxD) 29" x 9.5" x 19~24.5"
Shipping Dimensions (WxHxD) 38.3" x 6" x 20.1"
Without Stand Weight 16.97 lbs
With Stand Weight 21.97 lbs
Shipping Weight 26.46 lbs
UL(cUL) Yes
Windows Yes (win8)
Power Cord 1
Wall mount size (mm) 100 x 100
DP to MiniDP Yes
Limited Warranty 1 Year Parts & Labor
UPC 719192195530

What People Are Saying

Rated 3 out of 5 by from Does not work with 2016 Macbook Pro with USB-C Monitor is great looking. Problem is using a USB-C to DisplayPort cable. This will not work. LG emailed back saying they do not recommend using conversion cables, adapters or docks for this monitor but only the cables that come with the box. The displayport cable looks a little thicker than a standard displayport cable. So this will not work on a 2016 MacBook Pro. Will work with Apple Multimedia adapter with HDMI but at 30 hz. This is no ordinary 4k monitor. Bottom line go for the LG Ultra Fine 5K made for 2016 MacBook Pros. WOW that thing is amazing. Tried this monitor because LG 5k was not available yet at the time. Returned it and got the LG 5K. By new stuff with new stuff.
Date published: 2017-01-20
Rated 1 out of 5 by from Terrible - Buy a different monitor I bought this monitor over a year ago and had pops and blackouts that continued and got worse...using the supplied cable. I had it inspected twice and updated firmware at local repair shop. Finally had to send to LG for repair. It worked for a couple months but has just started to pop and blackout again. This must be a poor design, and completely ridiculous to have these issues with such an expensive monitor.
Date published: 2016-12-06
Rated 4 out of 5 by from Nice video quality poor controls The video is really nice and so are the extra inputs. The problem with it is you can't easily switch between inputs without navigating the menu which is really slow. There should be buttons for each input to make it faster. That is my biggest downgrade.
Date published: 2016-11-05
Rated 4 out of 5 by from 31 " 4K LG Monitor I bought this about 8 months ago, am I am fully satisfied with the product.
Date published: 2016-10-01
Rated 5 out of 5 by from only one issue... I believe this monitor should have the input. signal requirements documented in some more specific way. The flier "manual" sucks. I have purchased it, then returned it, as it kept going off on me, while in the highest resolution and over the mini DP, using supplied cable. I purchased another DP cable, with confirmed 4k specs, and the same issue was still occuring. randomly, after a few minutes, it was shutting off the picture, like it lost the signal. powering off and on was bringing the picture back, for another several minutes, then again... click... gone... I've then gone over the opinions about this monitor on the bestbuy site, and someone there said it turned out to be his gtx950 card. And that his problem was solved with upgrading to gtx970. I have ordered another monitor, and gtx970... I've then replaced my nvidia gtx950 with nvidia gtx970, and the issue magically disappeared. It's been working ok since. It would have been sooo nice to have some way knowing such thing when about to buy one. Not having to learn the hard way, going through the hassle of returning, purchasing another one... GTX950 isnt a bad graphics card. Its just not meant for playing some high grsphics games, and I don't play games. And the 950 does list the correct resolution/frequency in its specs. How could I have figured then, this is not going to work with 950? This should be better documented. p.s. I hate the joystick thing. super annoying.
Date published: 2016-09-22
Rated 5 out of 5 by from Amazing picture I have had this monitor for more than 6 months and I am still amazed how good the picture is. For games, videos or photos it is impressive how clear and sharp the images are.
Date published: 2016-07-16
Rated 5 out of 5 by from Excellent display I use this at work with the latest and greatest Retina Macbook Pro 15, and this is an external display which is worthy companion to the internal display. I also have 2013 rMBP but it is not capable of better resolution than 3840x2160 via HDMI and the image displays stretched. The colors look excellent and even colored surfaces look even. I use the monitor mainly for coding and use the resolution for desktop space, I run it at native resolution without HiDPI. The size of text becomes a very small even at this size (31 inches may sound large but it is not that large really, 40 inch would be better) and I am sitting very close to the display. The monitor can be viewed very close so it is not a problem, but it is excellent coding experience. I run terminal and Xcode side by side. I have increased font size on Xcode a little. I also use the monitor for 4K video editing (GH4, 1DX mark II) with Davinci Resolve and FCPX and for photo editing with Lightroom and Photoshop. The monitor is excellent in these tasks obviously. The DP1.2 output can not output continuously the 4096x2160 at 60 Hz, so to avoid monitor blacking out annoyingly, the output frequency had to be lowered to 50Hz using SwitchResX and it was not straightforward. With HDMI it is possible to use the monitor at 30Hz without such tweaking. This is not monitor's fault but Mac's fault and especially a serious limitation in OSX that it can not adapt to 50Hz without resorting to a third party app that "hacks" different frequency to the system. This is excellent monitor for those who know what to do (SwitchResX tweaking) and know the limitations of their computer and like with Mac can deal with them.
Date published: 2016-06-04
Rated 1 out of 5 by from Absolute Lemon This monitor is an absolute and total piece of garbage. It glitches. Blacks out. Wont turn back on. Ive tried new drivers and reboots. Everything. It has been a nightmare. Please do NOT buy this thing. Google the amount of people experiencing the same problems and you will see for yourself.
Date published: 2016-05-28
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We're here to support you with our product.

View 31MU97-B Product Support

Contact us for any support inquiries.


Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

The HDMI ports on this are version 1.4, not 2.0 correct? If so, can a 10 Bit color signal be transferred to this monitor using the unit's HDMI 1.4 port, coming from a Blackmagic Decklink card, which supports 10bit color export over HDMI (2.0)?

Asked by: editor4yourfilm
The LG 31" Class 17:9 Digital Cinema 4K IPS LED Monitor (31" Diagonal), Model # 31MU97-B supports 10-bit color depth, but does not include HDMI 2.0 connection, it comes with HDMI 1.4 ports and HDMI 1.4 is limited to 8-bit color depth...^IFV
Answered by: LGJoel
Date published: 2017-06-07

This monitor comes with hardware calibration from factory. So what is the external calibrator ? why is it used for & how to use it ?

Asked by: Sunyday
Our offices, in the United States, do not have any product information for India. In order to obtain such information, it is recommended to check our subsidiary’s website, at
Answered by: NeilE
Date published: 2017-04-12

Where can I get a Vesa mounting plate / bracket for this monitor?

Asked by: John G
We appreciate your interest in this monitor and its options. It appears that this monitor is designed for compatibility with the RW120 mounting bracket, or any other bracket which is compatible with a 100mm x 100mm bolt spacing.
Answered by: NeilE
Date published: 2017-03-20

My LG 31mu97 wont turn on

Asked by: Adrian_actually1
We regret the inconvenience you have experienced with this monitor. If the device will not activate, it is recommended to check the power cord and electrical outlet. If this does not resolve the matter, then the unit will likely require service. Please contact our Customer Interactive Center at 800-243-0000 to make proper service arrangements.
Answered by: NeilE
Date published: 2017-02-23

What wall mount is compatible with this model? I have purchased a few and none of them are compatible due to the 5x5 indentation on the back of the monitor where the wall mount is supposed to be attached .

Asked by: Jaywass
We appreciate your interest in this monitor. According to the information listed on page 13 of the owner’s manual, begin by installing the wall mount plate, followed by the RW120 mounting bracket, which is a VESA Compliant 100mm x 100mm connection.
Answered by: NeilE
Date published: 2017-02-03

what type of power cord does it take i need to buy one

Asked by: Anderson101
Parts and accessories can be obtained through our parts distributor, MCM Electronics. Their contact number, for placing orders, is 800-824-9491. You can also use their website, at The part number for this item is: EAD60813701.
Answered by: NeilE
Date published: 2016-08-23


Asked by: RASHUS
The model Z has thunderbolt.  The model C has USB-C The model B is the original updated model. 
Answered by: CharlieTuna
Date published: 2016-08-11

Hello,  The base of my 31mu97-b is cracked and not stable. How can I go about getting a replacement stand from LG without sending the whole display in. I need it for work and cannot send a whole unit in for repair. 

Asked by: Cullen hickman
We appreciate your interest in this Monitor. Parts and accessories can be obtained through our parts distributor, MCM Electronics. Their contact number, for placing orders, is 800-824-9491. You can also use their website, at
Answered by: ShenaS
Date published: 2016-03-01
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