LG 34U640B 34-Inch UltraWide WQHD (3440 × 1440) Curved Monitor, Black

Product Description:

The LG 34U640B-B is a 34-inch curved UltraWide monitor that combines a spacious 3440 × 1440 WQHD resolution, a fast 144Hz refresh rate, and USB-C single-cable connectivity with 65W laptop charging — creating a versatile workstation display that's equally capable of powering productive multi-app workflows, delivering vivid color-accurate creative work, and providing smooth, immersive gaming from one sleek, narrow-bezel panel.

The 21:9 UltraWide WQHD resolution gives you 33% more horizontal screen real estate than a standard 16:9 QHD monitor, letting you comfortably arrange three application windows side by side — a code editor alongside a browser and terminal, a timeline with preview and bins in video editing, or a spreadsheet next to email and chat — without the bezels and alignment hassle of a dual-monitor setup. The subtle 1800R curvature wraps the expansive 34-inch display gently toward your peripheral vision, keeping the edges of the screen equidistant from your eyes for a more natural, comfortable viewing experience that reduces eye strain during long work sessions.

The VA panel delivers a rich 4000:1 static contrast ratio — four times deeper than typical IPS panels — producing inky blacks, bright whites, and exceptional shadow detail that makes movies, photos, and dark-themed interfaces look dramatically more vivid. Color performance is impressive: 99% sRGB and 99% DCI-P3 coverage with 1.07 billion displayable colors (10-bit via FRC) ensure accurate, vibrant reproduction across professional workflows, photo editing, and everyday media consumption. HDR10 support adds expanded brightness and contrast range for compatible content.

The 144Hz refresh rate paired with a 5ms gray-to-gray response time transforms this from a productivity monitor into a capable gaming display. AMD FreeSync Premium synchronizes the panel's refresh rate with compatible AMD and NVIDIA graphics cards, eliminating screen tearing, stuttering, and input lag during fast-paced gameplay. The combination of ultrawide field of view, smooth 144Hz motion, and the immersive 1800R curve creates a gaming experience that flat 16:9 monitors simply cannot replicate.

USB Type-C connectivity is the standout convenience feature. A single USB-C cable delivers display signal (DP Alt Mode), data transfer to the monitor's USB hub, and up to 65W of Power Delivery laptop charging — meaning you plug one cable into your laptop and get a fully connected, fully charging workstation instantly. The built-in Dual Controller (KVM) feature lets you control two connected PCs with a single keyboard and mouse, switching between them and even dragging files across systems — ideal for users who work between a desktop and laptop or personal and work machines.

Additional connectivity includes two HDMI 2.0 inputs, one DisplayPort 1.4 input, two USB downstream ports (hub), and a 3.5mm headphone jack. The tilt-adjustable (-5° to +15°) and height-adjustable (80mm) stand provides ergonomic flexibility, and VESA 100 × 100mm compatibility supports wall mounts and monitor arms. Reader Mode reduces blue light for comfortable extended reading, and Flicker Safe technology eliminates on-screen flicker to reduce eye fatigue. LG's On-Screen Control software and Split Screen utility provide easy access to picture presets and multitasking window layouts.

Product Features:

• 34″ UltraWide WQHD (3440 × 1440) – 21:9 aspect ratio with 33% more horizontal space than 16:9 QHD for true side-by-side multitasking
• 1800R Curved VA Panel – Immersive curvature with 4000:1 contrast for deep blacks and exceptional shadow detail
• 144Hz Refresh Rate + 5ms GtG – Smooth, responsive visuals for gaming, streaming, and fast-paced content
• AMD FreeSync Premium – Tear-free, low-latency gaming with compatible AMD and NVIDIA GPUs
• 99% sRGB + 99% DCI-P3 Color Coverage – Accurate, vibrant color for professional creative work and media
• 1.07 Billion Colors (10-bit) – Smooth gradients and banding-free tonal transitions
• HDR10 – Expanded contrast and brightness range for supported content
• USB-C with 65W Power Delivery – Single-cable display, data, and laptop charging via DP Alt Mode
• Dual Controller (KVM) – Control two PCs with one keyboard and mouse; drag-and-drop files across systems
• 2× HDMI 2.0 + DisplayPort 1.4 – Connect up to three video sources simultaneously
• USB Hub (2× Downstream) – Connect peripherals through the monitor
• Tilt + Height Adjustable Stand – -5°/+15° tilt, 80mm height adjustment for ergonomic positioning
• VESA 100 × 100mm – Compatible with wall mounts and monitor arms
• Reader Mode + Flicker Safe – Blue light reduction and flicker-free technology for all-day comfort
• On-Screen Control + Split Screen – LG software for easy presets and multitasking layouts
• Virtually Borderless Design – Slim bezels maximize screen area and minimize distraction

Product Specifications:

Specification	Detail
Brand	LG
Model	34U640B-B
Screen Size	34 inches
Panel Type	VA
Curvature	1800R
Resolution	3440 × 1440 (UWQHD / WQHD)
Aspect Ratio	21:9
Refresh Rate	144Hz
Response Time	5ms (Gray-to-Gray)
Brightness	300 cd/m²
Contrast Ratio	4000:1 (Static)
Color Depth	1.07 Billion Colors (8-bit + FRC)
Color Gamut	99% sRGB, 99% DCI-P3
HDR	HDR10
Viewing Angles	178° H / 178° V
Adaptive Sync	AMD FreeSync Premium
USB-C	Yes (DP Alt Mode + 65W PD + Data)
HDMI	2× HDMI 2.0
DisplayPort	1× DisplayPort 1.4
USB Hub	2× USB Downstream
Audio Output	3.5mm Headphone Jack
Built-In Speakers	No
KVM / Dual Controller	Yes (control 2 PCs, drag-and-drop files)
Eye Care	Reader Mode, Flicker Safe
Software	On-Screen Control, Split Screen
Stand Adjustments	Tilt (-5° to +15°), Height (80mm)
VESA Mount	100 × 100mm
Bezel Design	Virtually Borderless
Dimensions (without stand, W × H × D)	31.8″ × 14.3″ × 5.5″ (809 × 362 × 139mm)
Dimensions (with stand, W × H × D)	~31.8″ × 18.7″ × 9.0″
Weight (without stand)	12.3 lbs (5.6 kg)
Weight (with stand)	17.0 lbs (7.7 kg)
Color	Black
Use Case	Productivity, content creation, photo/video editing, gaming, multi-app workflows, single-cable laptop docking