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  • 34" UltraWide QHD (3440 x 1440) IPS Display
  • Ergo Stand (Extend/Retract/Swivel/Height/Tilt)
  • 3-Side Virtually Borderless Design
  • sRGB 99% Color Gamut / HDR10
  • AMD FreeSync™
  • Color Calibrated

LG is proud to offer

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34" UltraWide Ergo QHD IPS HDR Monitor with FreeSync™
$ 499.99
#1 UltraWide monitor brand in the U.S. for 3 years in a row*

#1 UltraWide monitor brand in the U.S. for 3 years in a row*

*The NPD Group, Inc., U.S. Weekly Retail Tracking Service, Monitors, Aspect ratio: 21:9, Based on Dollars & Units, 52 Weeks Ending Apr 4, 2020 vs. same weeks in 2018 & 2019.
34" 21:9 UltraWide™ QHD

Wider View to Get More Done

See more, do more. The 34-inch UltraWide® QHD (3440x1440) resolution allows you to edit clips of footage and simultaneously run different programs. You can edit, code and review, while enjoying the immersive and clear visual experience on a rich, vivid IPS screen that's accurate at wide angles.
*This image is simulated to help you understand.
  • Extend / Retract 0~180mm

  • Swivel ± 280˚

  • Height 0~130mm

  • Tilt ± 25˚

*The figures above are the available range of features.
*The product images in the video are for illustrational purposes only and might differ from the real product.
*For detailed installation instructions, see the product manual at Support page.
*All product images shown in above videos are illustrated by a representative product of LG for demonstration purposes and might differ partially from the real product.
*To download the latest OnScreen Control, visit LG.COM.
*The product images and OnScreen Control in the video are for illustrational purposes only and might differ from the real product and Actual OnScreen Control.
*This image is simulated to help you understand.


    • Size
    • 34"
    • Display Type
    • IPS
    • Response Time
    • 5ms (GTG)
    • Refresh Rate
    • 75Hz
    • Display Resolution
    • UW-QHD
    • Color Gamut (Typ.)
    • sRGB 99% (CIE1931)
    • Color Depth (Number of Colors)
    • 16.7M
    • Pixel Pitch (mm)
    • 0.2325 x 0.2325 mm
    • Aspect Ratio
    • 21:9
    • Resolution
    • 3440 x 1440
    • Brightness
    • 300cd/m²
    • Contrast Ratio
    • 1000:1
    • Viewing Angle
    • 178º (R/L), 178º (U/D)
    • Surface Treatment
    • Anti-Glare


    • HDMI
    • Yes x 2
    • DisplayPort
    • Yes x 1
    • Headphone Out
    • Yes
    • USB Up-stream
    • Yes x 1
    • USB Down-stream
    • Yes x 2


    • Type
    • Adapter
    • Input
    • 100 ~ 240Vac, 50/60Hz
    • Power Save/Sleep Mode (Max.)
    • Less than 0.5W
    • DC Off (Max.)
    • Less than 0.3W
    • Power Consumption (Typ.)
    • 45W
    • Power Consumption (Max.)
    • 67W


    • Color Calibrated
    • Yes
    • Color Weakness Mode
    • Yes
    • Adaptive Sync
    • AMD FreeSync™
    • Black Stabilizer®
    • Yes
    • Dynamic Action Sync®
    • Yes
    • Flicker Safe
    • Yes
    • Smart Energy Saving
    • Yes
    • Reader Mode
    • Yes
    • Super Resolution+
    • Yes
    • Dual Controller
    • Yes
    • OnScreen Control (OSC)
    • Yes
    • HDR (High Dynamic Range)
    • Yes (HDR10)
    • HDR Effect
    • Yes


    • Speaker
    • Yes
    • Speaker Output
    • 7W x 2
    • Maxx Audio
    • Yes


    • With Stand (WxHxD)
    • 32.2" x 24.1" x 16.0" (Up)/32.2"x 18.9" x 16.0" (Down)
    • Without Stand (WxHxD)
    • 32.2” x 14.4” x 1.8”
    • Shipping Dimensions (WxHxD)
    • 37.0” x 20.3” x 10.6”
    • With Stand Weight
    • 23.8 lbs
    • Without Stand Weight
    • 15.2 lbs
    • Shipping Weight
    • 33.5 lbs


    • Ergo Stand
    • Yes (Tilt/Height/Swivel/Extend/Retract)


    • Wall Mount Size (mm)
    • 100 x 100 mm
    • HDMI
    • Yes
    • Others (Accessory)
    • DC Extension cable 3.9 ft Black w/ Holder


    • 2020 Model
    • Yes


    • Limited Warranty
    • 1 Year Parts and Labor
    • UPC
    • 195174002919

What people are saying

Rated 5 out of 5 by from Exactly what I needed! I am a web developer and this is by far the best addition possible to my workstation. The stand is sturdy and can take many positions.
Date published: 2021-11-19
Rated 5 out of 5 by from Makes my life easier As a person with vision disabilities this monitor makes my daily life much easier. Depending my vision on a particular day and the lighting in my office at the moment a stationary monitor makes it difficult for me to adjust the screen to properly see the screen and it’s content. With the ego arm I can now adjust my view to my particular need at that moment. It a Godsend!
Date published: 2021-10-28
Rated 5 out of 5 by from It’s An Amazing Monitor I never knew a monitor could do so much. My first impression is it has a sleek design and a very ergonomic stand. The way the stand is mounted, it seems to have saved 50% of my workspace. I love how this monitor can be positioned and viewed at pretty much every angle thanked to the great engineering design of the stand. I use this monitor mostly with Microsoft software where white background is unavoidable. This is the reason why I really appreciate LG’s incorporation of Reader mode into this monitor. Basically, it dims the monitor and reduces blue light to lessen eye fatigue. In the past, I would have to manually turn down the brightness with my other monitor, but it could never produce the kind of color temperature optimal enough for reading environment like this monitor could. As a result, my eyes don’t get tired quick, I can work longer, and more importantly, I’m not prone to getting headache from prolonged staring at this monitor. The fact that it has multiple HDMI inputs allows me the convenience of connecting an Android TV box to watch TV shows and movies. Despite having the screen brightness of only 300 nits, it’s ample for my room’s ambience. In fact, I often need to change to Cinema mode when watching movies so it’s not too bright for my eyes. Even though it has a refresh rate of 75 Hz and response time of 5ms, which is considered mediocre for gaming purpose, I haven’t seen any ghosting. Moreover, as a very conscientious energy-saving person, one thing I wish this monitor has is a way to visually confirm whether it has turned off or still powered on. I find myself sometimes turning it on and off again just to make sure the monitor is completely off so that I don’t waste electricity unnecessarily. Overall, this is the best monitor I’ve ever owned, and I really like this monitor for its ergonomic design and versatility. Disclaimer: I received this product at a discounted rate in exchange for my honest opinion.
Date published: 2021-09-29
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Ask your questions. Share your answers.
Please review the detailed product information and help guides in the
Product Support section for this product prior to posting a question.

what is maximum thickness of the table that the ergo stand can be mounted on (in cm)? thanks

Asked by: dvdvdv
The C-clamp for the Ergo Stand for the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B can only be used on tables less than 90mm (3.5") 90mm is 9 cm...^Ivan
Answered by: Ivanf
Date published: 2021-08-04

Is this monitor HDCP compliant? If so, which version number? I also would like to know which versions of DisplayPort and HDMI this monitor uses. Thanks!

Asked by: GastonK
@Ivanf You say that HDCP compliance is not required, but that is only true in a single-monitor setup or in a multiple-monitor setup where no other monitors are 4K. For example, right now one of my monitors is 4k and is HDCP 2.2 compliant, and one is not. As a result of this streaming services, such as Netflix, will not stream 4K content while the lower-rated monitor is connected to the PC, no matter which monitor Netflix is display on. This is why I asked the question - is the monitor HDCP 2.2 compliant, or not? That is the only thing that matters when I asked the question. I appreciate the attempt to get to the root of my reason for asking the question (I really do), but it was not particularly helpful in this case, unfortunately. Knowing the HDMI port and DisplayPort versions is very helpful, so thank you for answering that. It actually also answers my first question about HDCP, which is why I asked. DisplayPort 1.4 should be HDCP 2.2 compliant, so I believe this monitor will be OK for my application (correct me if I am wrong). My understanding is that in order to be rated as DisplayPort 1.4 it must be HDCP 2.2 compliant (I do not believe the same holds true for HDMI though).
Answered by: GastonK
Date published: 2021-04-29

I'm wanting to get two of the monitors and connect them to a M1 Mac mini, will I still have to control the volume from the bottom of the monitor or will I be able to control it through the keyboard? 

Asked by: Scottb215
Controlling the volume and brightness settings from the keyboard for your M1 Mac Mini will work for Mac Displays, but it's more tricky for external monitors like the LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B and you will not be able to control them from the keyboard and you will probably need an app like MonitorControl to control the volume and brightness settings for the monitor...^IFV
Answered by: Ivanf
Date published: 2021-02-01

Is it possible to connect two Mac computers to this display simultaneously, split the screen and show both computers' outputs side by side? Thanks in advance.

Asked by: Davidin503
Picture-by-Picture (PBP) is a function that allows you to divide the screen in two and view two external video input sources simultaneously. The LG 34'' UltraWide Ergo QHD IPS HDR Monitor with FreeSync™, Model # 34WN780-B does not support PBP. You can download and install LG's OnScreen Control (OSC) software from the monitor's support page on our site which will give you 14 screen split options and four Picture-in-Picture (PIP) options. PIP is a function that allows you to view an external video input source on the main window and another external video input source in an inset window on the main screen...^IFV
Answered by: Ivanf
Date published: 2021-02-11
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