Elevate your workspace with the LG 27U421A‑B.AEKQ 27″ Full HD LED Monitor. Featuring a 1920 × 1080 resolution display, this monitor offers crisp visuals and vibrant colour for everyday computing, multitasking, and entertainment. Designed with eye‑comfort in mind, it includes ergonomic adjustments and modern connectivity for a seamless setup.
21.5" Full HD
Compact yet capable
Our FHD(1920x1080) screen delivers clear visuals with an sRGB 99% (Typ.) color gamut and 250 nits brightness with 3000:1 contrast ratio.
*Images have benn simulated to enhance feature understanding, and may differ from actual use experience.
*The keyboard and mouse are not included in the package.
100Hz Refresh Rate
Fluid visuals.
Seamless flow.
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 benn 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.
1ms MBR
Fast-paced speed to victory
1ms Motion Blur Reduction* makes smooth gameplay, reducing blur and ghosting. Dynamic and fast-paced objects amidst all the action can give gamers a competitive edge.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*1ms Motion Blur Reduction causes lowered luminance, and the following features cannot be used while it is activated : Adaptive sync / DAS (Dynamic Action Sync)
*Flicker may occur during 1ms MBR operation.
sRGB 99% (Typ.) and HDR 10
Feel actual combat with vivid color
Our monitor supports HDR 10 and offers 99% sRGB (Typ.) coverage, providing a wide color spectrum that enables high-fidelity color representation for an immersive gaming experience. The vivid color expression also makes it ideal for creative work, productivity tasks, and casual entertainment alike.
LG Switch app
Switch swiftly
LG Switch app helps to optimize the monitor to your work and life. You can readily divide the whole display up to 6, change the theme design, or even launch a video call platform with a mapped hotkey.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*To download the latest version of the LG Switch app, visit LG.com.
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.
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.
Ergonomic design
The L-shaped stand with a square base enhances space efficiency and keeps the workspace organized. Its stable design improves visual focus and supports a -5° to 20° tilt, helping you adjust the screen for better comfort and viewing alignment.
Specifications
| Display |
| sRGB coverage (typical) |
99% |
| Colour gamut standard |
sRGB |
| High Dynamic Range (HDR) technology |
High Dynamic Range 10 (HDR10) |
| High Dynamic Range (HDR) supported |
Yes |
| Display diagonal (metric) |
54 cm |
| Pixel pitch |
0.2493 x 0.241 mm |
| Display number of colours |
16.7 million colours |
| Viewing angle, vertical |
178° |
| Viewing angle, horizontal |
178° |
| Maximum refresh rate |
100 Hz |
| Contrast ratio (typical) |
3000:1 |
| Screen shape |
Curved |
| Response time measurement type |
GTG (Gray to Gray) |
| Response time |
5 ms |
| Display brightness (typical) |
250 cd/m² |
| Panel type |
VA |
| HD type |
Full HD |
| Touchscreen |
No |
| Display technology |
LED |
| Native aspect ratio |
16:9 |
| Display resolution |
1920 x 1080 pixels |
| Display diagonal |
54.6 cm (21.5") |
| Performance |
| Smart modes |
Energy saving |
| Flicker-free technology |
Yes |
| Multimedia |
| Built-in camera |
No |
| Built-in speaker(s) |
No |
| Design |
| Product colour |
Black |
| Market positioning |
Consumer |
| Ports & interfaces |
| Headphone out |
Yes |
| HDMI ports quantity |
1 |
| HDMI |
Yes |
| VGA (D-Sub) ports quantity |
1 |
| Built-in USB hub |
No |
| Ergonomics |
| Tilt angle range |
-5 - 20° |
| Tilt adjustment |
Yes |
| Height adjustment |
No |
| Panel mounting interface |
100 x 100 mm |
| VESA mounting |
Yes |
| Power |
| Power supply type |
External |
| AC input frequency |
50/60 Hz |
| AC input voltage |
100 - 240 V |
| Power consumption (off) |
0.3 W |
| Power consumption (standby) |
0.5 W |
| Power consumption (typical) |
13 W |
| Energy consumption (HDR) per 1000 hours |
16 kWh |
| Energy consumption (SDR) per 1000 hours |
13 kWh |
| Energy efficiency class (HDR) |
E |
| Energy efficiency class (SDR) |
E |
| Weight & dimensions |
| Weight (without stand) |
1.9 kg |
| Height (without stand) |
284.6 mm |
| Depth (without stand) |
50.7 mm |
| Width (without stand) |
492.5 mm |
| Weight (with stand) |
2.3 kg |
| Height (with stand) |
378.4 mm |
| Depth (with stand) |
200.8 mm |
| Width (with stand) |
492.5 mm |
| Packaging data |
| Package type |
Box |
| Package weight |
3.3 kg |
| Package height |
350 mm |
| Package depth |
138 mm |
| Package width |
556 mm |
| Packaging content |
| Power adapter included |
Yes |
| Cables included |
AC, HDMI |
| Other features |
| Package weight |
3.3 kg |
| Motion blur reduction |
Yes |
| Brand specific technologies |
Black Stabilizer, Crosshair |
