LG 27U421A-B 27'' FHD curved monitor with 100Hz refresh rate and USB-C port.

The LG 27U421A‑B is a sleek 27″ curved VA monitor tailored for versatile users—ideal for productivity, casual gaming, and media consumption. Its 1920 × 1080 FHD resolution produces sharp visuals with vibrant color accuracy (99% sRGB), complemented by a high contrast ratio of 3000:1 and a 1500R curvature for immersive viewing.

Boasting a smooth 100 Hz refresh rate and 5 ms (GtG) response time, the monitor reduces motion blur during fast-paced tasks like video playback or gaming. HDR10 support enhances dynamic content, while Black Stabilizer improves visibility in dark scenes—perfect for gaming or editing.

Connectivity is streamlined with USB‑C (15 W PD) and HDMI, and the ultra-slim three-sided bezel and compact tilt stand maximize desk space while enabling ergonomic adjustments. Smart features like Dynamic Action Sync, Reader Mode, Flicker Safe, Super Resolution+, and the LG Switch software provide responsive performance, eye care, and multitasking flexibility

27" FHD VA curved display

Vivid colors with precision

Our FHD (1920x1080) screen delivers clear visuals with an sRGB 99% (Typ.) color gamut and a 1500R curvature, enhancing work productivity.

A 27-inch FHD curved monitor on a desk displays vibrant visuals and apps. The workspace includes a plant, papers, a keyboard, mouse, headphones, and coffee, with an office blurred in the background.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*The keyboard and mouse are not included in the package.

A fast 100Hz provides a smooth frame loading in various programs.

100Hz Refresh Rate

Fluid visuals.
Seamless workflow.

A fast 100Hz provides a smooth frame loading in various programs. Also, you can enjoy realistic gameplay with less screen stuttering and motion blur.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*The refresh rate feature may vary depending on the user’s PC conditions.

USB-C

One port to meet your needs

Connect your laptop to the monitor with a USB-C cable** for up to 15W of power delivery and display connectivity.

Display pictogram. Display

Power delivery pictogram. Power Delivery
(Up to 15W)

An image of a laptop and monitor connected with a single USB-C cable.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
**To work properly, the USB-C cable is required to connect the USB-C port to the monitor. The USB-C cable is not included in the package (sold separately).

Focused visual comfort

Reader Mode
Reader Mode adjusts color temperature and luminance, supporting a suitable viewing experience for reading on a monitor.
Flicker Safe
Flicker Safe reduces invisible flickering on the screen, providing a comfortable view.

*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*Above feature may vary depending on real use conditions that the user is using.

Enjoy smooth gaming

Dynamic Action Sync
Reducing input lag with Dynamic Action Sync, gamers can catch critical moments in real time and respond quickly.
Black Stabilizer
Black Stabilizer helps gamers detect snipers lurking in the darkest corners and swiftly navigate flash explosions.

Monitors Specifications
Curvature	1500R
Color Gamut	sRGB 95% (CIE1931) sRGB 99% (CIE1931)
Pixel Pitch	0.3114 x 0.3114
Color Depth	16.7M
Size	27
Panel Type	VA
Aspect Ratio	16:9
Resolution	1920 x 1080
Brightness	220 250
Contrast Ratio	2400:1
Viewing Angle	178º(R/L) 178º(U/D)
Refresh Rate	100
Response Time	5ms
Product Warranty
Warranty	1 Year
Physical Specifications
Weight	3.72kg
Width X Depth X Height	609.58mm x 43.67mm x 360.32mm