Internal Reference:
27U421A
Product Description
LG 27U421A – 27" Curved Full HD VA Monitor
Model: 27U421A
Color: Black
️ Overview
Immerse yourself in stunning visuals with the LG 27U421A Curved Monitor, designed to deliver both comfort and performance.
Featuring a 27-inch VA curved panel (1500R curvature) with Full HD (1920×1080) resolution, it offers an expansive and natural viewing experience that draws you into your content.
With a 100Hz refresh rate and 5ms (GtG) response time, it ensures smoother motion and reduced blur for everyday use, entertainment, and casual gaming.
Enhanced by HDR10, Dynamic Action Sync, and Black Stabilizer, this monitor offers deeper contrast, better visibility in dark scenes, and seamless real-time responsiveness.
Built with Flicker Safe and Reader Mode for eye comfort, plus USB-C connectivity for convenience and charging, the 27U421A perfectly balances performance, style, and productivity.
️ Key Features
27-inch Full HD (1920×1080) curved VA panel for immersive viewing.
1500R Curvature enhances depth and focus, reducing eye strain.
100Hz Refresh Rate & 5ms (GtG) ensures smooth visuals and reduced motion blur.
HDR10 & HDR Effect for improved contrast and realism.
Flicker Safe + Reader Mode for long, comfortable viewing sessions.
Black Stabilizer & Dynamic Action Sync for improved gaming clarity.
USB-C Connectivity with 15W Power Delivery.
Ultra-slim and elegant design with 100×100mm VESA wall mounting support.
Specifications
| Category | Details |
| Display Size | 27" (68.5 cm) |
| Panel Type | VA |
| Resolution | 1920 × 1080 (Full HD) |
| Aspect Ratio | 16:9 |
| Brightness (Min / Typ) | 220 / 250 cd/m² |
| Contrast Ratio (Min / Typ) | 2400:1 / 3000:1 |
| Color Gamut (Min / Typ) | sRGB 95% / sRGB 99% (CIE1931) |
| Color Depth | 16.7 Million |
| Viewing Angle (H/V) | 178° / 178° |
| Response Time | 5ms (GtG at Faster) |
| Refresh Rate (Max) | 100Hz |
| Curvature | 1500R |
Visual & Comfort Enhancements
HDR10 & HDR Effect – Enjoy vivid color and enhanced contrast in every scene.
Flicker Safe Technology – Reduces screen flicker to minimize eye fatigue.
Reader Mode – Optimizes color temperature for comfortable text reading.
Color Weakness Mode – Helps users distinguish color differences more easily.
Super Resolution+ – Improves low-resolution content quality.
Black Stabilizer & Dynamic Action Sync – Optimized brightness and reduced input lag for competitive gaming.
Smart Energy Saving – Efficient performance with reduced power use.
Connectivity
| Port Type | Details |
| HDMI | 1 × HDMI 2.0 (HDCP 2.2) |
| USB-C | 1 × USB-C (HDCP 2.2, 15W Power Delivery) |
| Headphone Out | 3-pole (Sound Only) |
Power
| Mode | Consumption |
| Power Type | External Adapter |
| Input Voltage | AC 100–240V (50/60Hz) |
| Power (Typical) | 15W (KR: 17W) |
| Sleep Mode | <0.5W |
| DC Off | <0.3W |
Design & Dimensions
| Feature | Details |
| Color | Black |
| Stand Adjustment | Tilt |
| Wall Mount | VESA 100 × 100 mm |
| Dimensions (W×H×D) – With Stand | 609.58 × 451.48 × 170 mm |
| Without Stand | 609.58 × 360.32 × 43.67 mm |
| Weight (With / Without Stand) | 3.72 kg / 3.02 kg |
| Shipping Weight | 4.94 kg |
Included Accessories
HDMI Cable
Power Adapter
Quick Start Guide
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