LG Ultravide Ergo 34WN780-B



The LG UltraWide Ergo 34WN780-B has a sleek, ergonomic design and a form factor that works well in everyday work situations, as well as good features elsewhere. However, it is more expensive than a conventional widescreen, and can only provide medium image quality.


  • Exquisite ergonomic arm design
  • Widescreen, high-resolution display
  • Solid, accessible connection
  • Good build quality


  • Middleing contrast ratio
  • Medium color
  • No USB-C port


  • United KingdomRRP: £ 425
  • AmericaRRP: $ 591
  • EuropeRRP: € 527

The main advantage

  • A fantastic designThe ergonomic arm allows movement in many directions and can contribute to a neat, space-saving work environment.

  • A wide resolutionThe 21: 9 aspect ratio and 3440 x 1440 resolution make this screen ideal for multi-tasking and a good alternative to replacing some old or smaller monitors.

  • Good connectivity and featuresLG has an easily accessible USB port, a Windows app for display adjustment, and even some nice speakers.


The LG UltraWide Ergo 34WN780-B is a widescreen monitor that does not comply with the usual blueprint. Instead, LG’s device has a stunning ergonomic arm that offers incredible versatility.

In fact, that ergonomic arm adds more movement options than you’ll find in most business shows, which is a boon when you’re in a cramped office or at home.

34WN780-B is definitely fascinating, but it’s not cheap. At the time of writing, it is available in the UK for 425; But prices often hit 500 or more. In the US, expect to pay $ 591. In Europe, it is available for € 528.

This is a bit expensive for a 34-inch widescreen with this resolution – only the more expensive monitors at this size and resolution tend to be bombastic gaming displays instead of productivity panels.

Design and features

  • A gorgeous, ergonomic stand
  • A widescreen form factor that works well in everyday work
  • Internal specification mid-range, but no further

The ergonomic arm of the LG UltraWide Ergo 34WN780-B secures your desk with a clamp instead of the traditional base. It’s ideal for space-saving, and the clamp is easy to use – it’s wide and easy to attach, and it has a rubberized coating that improves its grip and avoids damage to the desk.

Once it is attached to your desk, the ergonomic arm provides a wide range of movement. It can extend or retract 180 mm and swive through a strong 280 degrees. It offers 25 degree tilt and 130mm height adjustment. In most cases the hand moves smoothly – only the height adjustment is strict.

Rear monitor

The LG also supports 100mm VESA mounts, although if you don’t want to use ergonomic arm, you’d better buy a cheap 34in widescreen with a conventional base.

Happily, if the clamp is installed properly, the arm feels strong and holds the panel securely, and the display itself is equally strong.

The clamp contains customizable screws that attach the LG to desks of various widths. This is a smart system, though be aware that the clamp must be fully attached to your desk to hold the display properly – this can be significantly tilted if the entire clamp is only partially secured. LG will require at least 75mm of space under your desk to fit properly.

There’s more consistency here than you would find on any conventional display, which makes LG ideal if you want to add versatility to your work environment – or save some space. The central strut also has a hidden wire management hole, so you can keep things cleaner.

LG 34 Ultravide Ergo

The 34in display has a shape aspect ratio of 21: 9 and a resolution of 3440 x 1440. It has more vertical pixels than a standard full HD screen and is about as wide as two 1080p displays. If you’re struggling with a display, or wanting to replace an aging dual-panel setup, the LG is a better option – you’ll get better uniformity and you won’t have to deal with unnecessary bezels.

If you work in creative applications with a horizontal timeline, a widescreen is understandable and also helpful for multi-tasking.

Inside, LG’s specifications are decent, but this display is not set up for those who need perfect image quality for color-sensitive work pressure. It’s an IPS panel, but it uses 8-bit color instead of 10-bit color – so it renders 16.7 million shades over a billion. And while LG says it adheres to the sRGB color gamut, there are no claims about Adobe RGB or DCI-P3 color space. Despite being HDR10 compatible, it is not bright enough for HDR content.

Elsewhere, the inclusion of 75Hz refresh rate and AMD FreeSync means you’ll get smooth daily animation and movement from this panel, but it’s a small step from 60Hz; It does not push any boundaries.

LG 34 Ultravide Ergo

LG focuses on practicality elsewhere. The on-screen menu occupies the right side of the display and has all the usual options and the central joystick provides easy control. A Windows app can change settings and different picture-in-picture and picture-by-picture settings.

On the back you’ll find a displayport socket and two HDMI connectors, as well as two USB 3.2 Gen 1 ports. They all face outwards, so they are easy to access. A pair of 7W speakers outside the feature set, and they provide reasonable quality – they’re good enough for casual video watching and background music.

It’s an impressive design, but some things are missing. If you work in color-sensitive applications, you’ll want better color reproduction on the inside and a USB-C with power delivery on the outside. Note that this display is not curved.

Image quality

  • The level of moderate contrast is fine for every day, but not too deep
  • The color washes out a bit due to the color temperature
  • If you need a screen for photo-editing or design work, don’t look at this display.

The 231 nits brightness level of the LG UltraWide Ergo 34WN780-B in factory settings is tough, and high enough to handle any office. The black dot of 0.27 net is medium. The contrast ratio of the results of 856: 1 is also average, but this is not a big problem: this panel may lack a little depth, but it is not important for everyday productivity applications.

The average delta of 0.97 is excellent, but the color temperature of 7470K is misleading and cold. LG renders sRGB gamut with 97.6% and 102.5% coverage and volume levels, and they have good results, but it has managed only 70.2% and 72.6% in Adobe RGB and DCI-P3 space.

Monitor from behind

The results of this criterion weaken the great Delta E figure. Color temperature means the color is a little weak. The lack of gamut power and the reliance on 8-bit color means that this display can only render a mainstream selection of shades and nothing more.

Medium color results and slightly less contrast do not hinder the daily workload: colors are still acceptable, with enough precision to handle mainstream photos, web browsers and applications, and still have enough depth and finesse.

LG’s median image quality is associated with average uniformity results. While the top and right corners of the display are aligned, the bottom-left and right-corner panels lose about 20% of their backlight power. While not a groundbreaking contribution to the genre, LG doesn’t fit into a job where accuracy and consistency are important.

LG 34 Ultravide Ergo

Don’t expect too much from LG’s selection of alternative screen modes. It has no work-specific options, and its vivid and HDR effect settings interfere with the display’s color temperature, contrast, and Delta E results.

LG’s benchmark issues mean that this display lacks panel depth, color capability, or accuracy for panels designed for color-sensitive workloads such as photo-editing and design.

However, this is not necessarily a problem: the LG UltraWide Ergo 34WN780-B focuses on versatility and ticks that box when offering adequate quality for everyday work stress. Given its ergonomic capabilities and size, it does a decent job justifying its slightly expensive price, especially if you want a neat desk or want to save space.

The latest deal

Will you buy it?

You want to save space, and have a big screen: Ergonomic stand is a well-designed and efficient option, and 21: 9 panel is an ideal option for busy offices.

You need a screen for color-sensitive work: LG has an ergonomic and versatile design, but lacks the quality or accuracy to handle photo-editing and other demanding workloads.

The latest thought

The LG UltraWide Ergo 34WN780-B is a great option for the office – perfect if you want to move a lot, or save space when replacing two displays. Just be aware that it is a little expensive, and it does not have the quality required for color-sensitive work stress.

How do we test

We use each monitor we test for at least a week. At that point, we’ll test it for ease of use and keep it up to speed using it for both everyday work and more specialized, color-sensitive work.

We also test its color and image quality with a colormeter to check its coverage and display quality.

We use it as our main monitor for at least a week.

We used a colormeter to get the benchmark results.

We have used our own judgment for image quality


Does LG have a warranty?

Ultravide has a standard one year warranty.

How much does LG weigh?

LG weighs in at 10.7kg, and its box weighs in at 15.1kg.

What about dimensions?

When combined, the LG is 818mm wide, up to 612mm long and up to 406mm deep.

Trusted review test data



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Delta Color Accuracy (Delta E)


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Types of HDR

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