| Brand | LG |
| Model | 24U421A |
| Model alias | 24U421A-B |
| Model year | 2025 |
| Size class | 23.8 |
| Diagonal | 604.478 mm 60.4478 cm 23.7983 in 1.9832 ft |
| Width | 527.04 mm 52.704 cm 20.7496 in 1.7291 ft |
| Height | 296.46 mm 29.646 cm 11.6717 in 0.9726 ft |
| Panel type | VA |
| Panel bit depth | 8 bits (6 bits + FRC) |
| FRC | Yes |
| Colors | 24 |
| Aspect ratio | 16:9 |
| Resolution | 1920 x 1080 |
| Resolution tags | Full HD / 1080p |
| Pixel pitch | 0.275 mm 0.0275 cm 0.0108 in 0.0009 ft |
| Pixel density | 92 ppi 36 ppcm |
| Display area | 90.36 % |
| Backlight | W-LED |
| Brightness | 250 |
| Static contrast | 3000 : 1 |
| HDR | HDR10 |
| Horizontal viewing angle | 178 |
| Vertical viewing angle | 178 |
| Minimum response time | 5 |
| Coating | Anti-glare/Matte (3H) |
| 3D | No |
| Maximal frequency | 100 |
| 110V | 100 V - 120 V |
| 220V | 220 V - 240 V |
| Alternating current frequency | 50 Hz - 60 |
| Power consumption (off) | 0.3 |
| Power consumption (sleep) | 0.3 |
| Width | 536 mm 53.6 cm 21.1024 in 1.7585 ft |
| Height | 322.6 mm 32.26 cm 12.7008 in 1.0584 ft |
| Depth | 45.7 mm 4.57 cm 1.7992 in 0.1499 ft |
| Weight | 2.2 kg 4.85 lbs |
| Width with stand | 536 mm 53.6 cm 21.1024 in 1.7585 ft |
| Height with stand | 414 mm 41.4 cm 16.2992 in 1.3583 ft |
| Depth with stand | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Weight with stand | 2.9 kg 6.39 lbs |
| Box width | 607 mm 60.7 cm 23.8976 in 1.9915 ft |
| Box height | 376 mm 37.6 cm 14.8031 in 1.2336 ft |
| Box depth | 132 mm 13.2 cm 5.1969 in 0.4331 ft |
| Box weight | 4.2 kg 9.26 lbs |
| Colors | Black |
| VESA mount | Yes |
| VESA interface | 100 x 100 |
| Removable stand | Yes |
| Height adjustment | No |
| Landscape/portrait pivot | No |
| Left/right swivel | No |
| Forward/backward tilt | Yes |
| Forward tilt | 5 |
| Backward tilt | 21 |
| HDMI 2.0 | 1 |
| 3.5 mm Audio Out | 1 |
| Features | 3-Side Virtually Borderless Design Adaptive-Sync technology Black Stabilizer Color Weakness Dynamic Action Sync Flicker-free technology HDR Effect LG Switch Low Blue Light Reader Mode Smart Energy Saving Super Resolution+ |
| Operating temperature | 0 °C - 40 °C 32 °F - 104 °F |
| Operating humidity | 20 % - 80 % |
| sRGB | 99 % |
| Stand depth | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Other | High-bandwidth Digital Content Protection (HDCP) 1.4 |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F |
| Storage humidity | 10 % - 85 % |
| Additional features | Anti-theft stand lock slot - Kensington |
| Accessories | HDMI cable |
| Speakers | No |
| Operating altitude | 5000 m (meters) 16404.2 ft |
| Storage altitude | 12192 m (meters) 40000 ft |
| Camera | No |
| Is Gaming | No |
| Is Curved | Yes |
| USB 3.0 (Type-C; 15W) | 1 |
| Brand | LG |
| Model | 24U421A |
| Model alias | 24U421A-B |
| Model year | 2025 |
| Size class | 23.8 |
| Diagonal | 604.478 mm 60.4478 cm 23.7983 in 1.9832 ft |
| Width | 527.04 mm 52.704 cm 20.7496 in 1.7291 ft |
| Height | 296.46 mm 29.646 cm 11.6717 in 0.9726 ft |
| Panel type | VA |
| Panel bit depth | 8 bits (6 bits + FRC) |
| FRC | Yes |
| Colors | 24 |
| Aspect ratio | 16:9 |
| Resolution | 1920 x 1080 |
| Resolution tags | Full HD / 1080p |
| Pixel pitch | 0.275 mm 0.0275 cm 0.0108 in 0.0009 ft |
| Pixel density | 92 ppi 36 ppcm |
| Display area | 90.36 % |
| Backlight | W-LED |
| Brightness | 250 |
| Static contrast | 3000 : 1 |
| HDR | HDR10 |
| Horizontal viewing angle | 178 |
| Vertical viewing angle | 178 |
| Minimum response time | 5 |
| Coating | Anti-glare/Matte (3H) |
| 3D | No |
| Maximal frequency | 100 |
| 110V | 100 V - 120 V |
| 220V | 220 V - 240 V |
| Alternating current frequency | 50 Hz - 60 |
| Power consumption (off) | 0.3 |
| Power consumption (sleep) | 0.3 |
| Width | 536 mm 53.6 cm 21.1024 in 1.7585 ft |
| Height | 322.6 mm 32.26 cm 12.7008 in 1.0584 ft |
| Depth | 45.7 mm 4.57 cm 1.7992 in 0.1499 ft |
| Weight | 2.2 kg 4.85 lbs |
| Width with stand | 536 mm 53.6 cm 21.1024 in 1.7585 ft |
| Height with stand | 414 mm 41.4 cm 16.2992 in 1.3583 ft |
| Depth with stand | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Weight with stand | 2.9 kg 6.39 lbs |
| Box width | 607 mm 60.7 cm 23.8976 in 1.9915 ft |
| Box height | 376 mm 37.6 cm 14.8031 in 1.2336 ft |
| Box depth | 132 mm 13.2 cm 5.1969 in 0.4331 ft |
| Box weight | 4.2 kg 9.26 lbs |
| Colors | Black |
| VESA mount | Yes |
| VESA interface | 100 x 100 |
| Removable stand | Yes |
| Height adjustment | No |
| Landscape/portrait pivot | No |
| Left/right swivel | No |
| Forward/backward tilt | Yes |
| Forward tilt | 5 |
| Backward tilt | 21 |
| HDMI 2.0 | 1 |
| 3.5 mm Audio Out | 1 |
| Features | 3-Side Virtually Borderless Design Adaptive-Sync technology Black Stabilizer Color Weakness Dynamic Action Sync Flicker-free technology HDR Effect LG Switch Low Blue Light Reader Mode Smart Energy Saving Super Resolution+ |
| Operating temperature | 0 °C - 40 °C 32 °F - 104 °F |
| Operating humidity | 20 % - 80 % |
| sRGB | 99 % |
| Stand depth | 170 mm 17 cm 6.6929 in 0.5577 ft |
| Other | High-bandwidth Digital Content Protection (HDCP) 1.4 |
| Storage temperature | -20 °C - 60 °C -4 °F - 140 °F |
| Storage humidity | 10 % - 85 % |
| Additional features | Anti-theft stand lock slot - Kensington |
| Accessories | HDMI cable |
| Speakers | No |
| Operating altitude | 5000 m (meters) 16404.2 ft |
| Storage altitude | 12192 m (meters) 40000 ft |
| Camera | No |
| Is Gaming | No |
| Is Curved | Yes |
| USB 3.0 (Type-C; 15W) | 1 |
