The LG UltraFine 40U990A-W 5K2K Thunderbolt 5 Curved Monitor features a 39.7 inch curved Nano IPS black display with a 5120x2160 5K2K resolution, 120Hz refresh rate and a wide 21:9 aspect ratio for workspaces designed for serious multitasking and creative work. The monitor also offers Thunderbolt 5 connectivity with up to 96W power delivery, AMD FreeSync Premium support and VESA DisplayHDR 600 for smoother motion, richer contrast and cleaner single cable setups. The wide colour coverage and expansive ultrawide format make it a strong option for editing, design and premium desktop productivity. Additonal features include a fully adjustable stand and integrated dual 10W speakers.
Features
LG UltraFine™ 40-inch Nano IPS Black 5K2K Display with Thunderbolt™ 5
Engineered for Precision
- Nano IPS Black
- 5K2K 5120x2160
- DisplayHDR True Black 600
- Thunderbolt™ 5
Performance - See the 5K2K Canvas. Master the Details.
5K2K Display. Sharper, Wider, Clearer.
The 5K2K Nano IPS Black display (5120x2160) offers 33% more pixels (The total number of pixels was calculated by multiplying the horizontal and vertical resolutions, resulting in 8.29 million pixels for 4K UHD and 11.05 million pixels for 5K2K.) than standard 4K UHD (3840x2160), providing a wider canvas to view more content and reducing the need to switch between programs. Its high resolution delivers razor-sharp images and precise detail, making it suitable for professional video editing, graphic design, and any visual work where accuracy is critical. The vivid clarity allows you to spot even the fine details without constant zooming or panning.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.
Professional Display. Professional Performance.
For tasks like colour grading, music production, and coding, the 40-inch 5K2K display provides the clarity and screen area needed for focus and precision.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Nano IPS Black Display
Nano IPS Black technology controls light to deliver deeper blacks for cinematic clarity. (Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.)
DCI-P3 99%
Accurate and vibrant colour gamut ideal for video editing and natural photo retouching.
VESA DisplayHDR™ 600
Accurate and vibrant colour gamut ideal for video editing and natural photo retouching.
2000:1 Contrast
A high contrast ratio deepens shadows and refines highlights, even in varying lighting conditions.
Subtle Hues Vividly Brought to Life
VESA DisplayHDR™ 600 offers bright highlights, deep shadows, and accurate colour representation for creative professionals. It enhances textures, elements, and natural interplay of light and shadow.
Images simulated to enhance feature understanding. It may differ from actual use.
Colours Beautifully Displayed
Covering 99% (Typ.) of the DCI-P3 colour gamut, this display offers a 25% wider range than sRGB — capturing nearly all the colours used in print, digital, and broadcast media. From vivid tones to subtle nuances, it ensures accurate colour reproduction for lifelike video and photo output.
- DCI-P3 99% with Nano IPS Black
Brightness: 450nits (Typ.), Colour Gamut: DCI-P3 99% (Typ.)
2000:1 Deeper Black and Rich Shadows
Nano IPS Black technology boosts the standard IPS contrast ratio from 1000:1 to 2000:1. This enhancement delivers more vibrant colours and sharper details across objects, shadows, and backgrounds. Enjoy deeper blacks and richer shadows with consistent colour expression from edge to edge — bringing a heightened sense of realism to your visual content.
Nano IPS is an advanced IPS technology that uses nanometre-sized particles on the screen's LED.
Protect Your Eyes, See Every Detail
This display has earned TÜV Rheinland’s 5-Star Eye Comfort certification under the new Eye Comfort 3.0 standard, reflecting its commitment to visual well-being. It combines a high refresh rate, precise colour accuracy, and integrated low blue light technology — utilising both RGB hardware and software tuning — to minimise harmful emissions without compromising colour fidelity.
TÜV Rheinland certification ID (Eye Comfort): 1111298743
Compatibility - One Connection for Efficient Workflow
5K2K Display with Thunderbolt™ 5
Thunderbolt™ 5 enables the production of commercial outputs such as documentary videos, movies, and game titles on an outstanding 5K2K display. It also offers data transfers that are twice as fast to connected devices compared to Thunderbolt™ 4 and allows for charging your laptop (up to 96W) through a single cable, ensuring stability, scalability, and security.
To work properly, the Thunderbolt 5 cable included in this package is required to connect the Thunderbolt 5 port to the monitor.
To access all features including 96W charging and 5120x2160 @120Hz output, your device must support Thunderbolt 5 or DisplayPort 2.1.
DP, HDMI, USB-C and Thunderbolt cables are included in the package.
*https://www.thunderbolttechnology.net
The Productive Workstation
With support for Thunderbolt™ 5 and DisplayPort, the display enables 5K2K Daisy Chain connectivity — allowing you to link two monitors and a laptop in a streamlined setup that boosts productivity.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
DPx1, HDMIx1, USB-Cx1, Power cordx1 and Thunderboltx1 cables are included in the package.
Multiple Setups with Multiple Ports
Easily connect your laptop, camera, tablet, or external storage devices using versatile ports like Thunderbolt™ 5, HDMI 2.1, and USB-C. Enjoy smooth, stable performance without the need for additional adaptors or splitters.
- USB-C down x4
- DisplayPort 2.1 x1
- Thunderbolt 5 x2
- HDMI 2.1 x2
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Usability - Expand Your Creative Scope
Feel Every Beat and Scene
Dive into your content and let the action surround you. Dual 10W built-in speakers with Rich Bass and AMD FreeSync technology brings every scene to play with deep sound and smooth visuals.
Images have been simulated to enhance feature understanding, and may differ from actual use experience.
AMD FreeSync Premium
FreeSync Premium technology ensures smooth, fluid motion by minimising screen tearing and stuttering — ideal for mixing audio while reviewing fast-paced games or high-resolution movies.
Switch Swiftly to Unleash Your Creativity
The LG Switch app enhances your monitor experience for both work and play. Easily personalise image quality and brightness with the intuitive picture wizard. Plus, you can split the screen into 11 parts and quickly launch your video call platform for added convenience.
To download the latest version of the LG Switch app, search for 40U990A in the LG.com Support Menu
Slim Design that Reduces Clutter
Featuring a 3-sided narrow bezel design and a sleek L-stand, this monitor minimises clutter while maximising desk space. Its fully adjustable base allows for swivel, tilt, and height customisation — enhancing workflow efficiency and helping you stay focused longer, whether you're editing video clips or retouching photos.
- 3-side Narrow Bezel Design
- Swivel (-20°〜20°)
- Tilt (-5°〜20°)
- Height (130mm)
Backed by a 3 year LG warranty.
