To properly experience our website, you will need to use an alternate browser or upgrade to a newer version of internet Explorer (IE9 or above).

The website utilizes responsive design to provide convenient experience that conforms to your devices screen size. In order to get the best possible experience on LG.COM website, please follow below instructions.

If you’re using Internet Explorer 8 or earlier, you will need to use an alternate browser such as Firefox or Chrome. Another option is to upgrade the Iinternet Explorer to a newer version (IE9 or greater).

If you’re using Internet Explorer 9 and higher, turn off your Internet Explorer browser’s “Compatibility View settings” by following steps below:

  • Right click at the top of your browser and make sure the “Menu Bar” option is selected
  • Select “Tools” from the menu bar and then select “Compatibility View settings”
  • In the pop-up menu uncheck all three boxes and click “Close”
  • Your browser window will automatically refresh and you’ll be ready to go
Skip to Contents


  • 34UC99-W

Key Features

  • 21:9 UltraWide® Curved QHD
  • Professional Colour Grading IPS Display
  • USB Type-C™
  • USB 3.0 Quick Charge
  • On-Screen Control
  • Versatility and Performance with Screen Split
21:9 UltraWide® Curved QHD

21:9 UltraWide® Curved QHD

LG 21:9 Curved UltraWide™ Monitor with QHD (3440x1440) wide screen real-estate ideal for using various programs with controlling and monitoring more thumbnails or timelines- simultaneously.

Professional Colour Grading IPS Display

Professional Colour Grading
IPS Display

The color reproduction is enhanced by the IPS display,
because unlike a VA display, IPS has no color distortion or color shift,
even when viewed from an angle.

USB Type-C™

USB Type-C™

While the combination of 3440x1440 QHD resolution and IPS display brings you the utmost immersion with a wider field of view, a single cable of USB Type-C™ simplifies your work station

USB 3.0 Quick Charge

USB 3.0 Quick Charge

It’s all about your ease of use. Charge the battery of your smartphone quickly using the USB 3.0 port on the monitor.
This port charges devices 2.4 times faster than a typical USB 2.0 cable.

On-Screen Control 2.0

OnScreen Control software* allows you adjust customize
all the display options with a few clicks.
*To download OnScreen Control : Visit > search for the product (ex. 34UC99) > Download OnScreen Control in Supports category

*This scene is for description of the feature only, product image might be different.

Versatility and Performance with Screen Split

Versatility and Performance with Screen Split

Through OnScreen Control Software, select most needed screen setting among
14 of Screen Split options and optimize Multi-tasking window organization and screen real estate use.

Visual Comfort with Reader Mode

Visual Comfort with Reader Mode

Eye-comfort features include Reader Mode, which modifies screen color
into softer tones just like reading a book

Visual Comfort with Flicker Safe

Visual Comfort with Flicker Safe

Proven LG Flicker Safe protectes your
eyes from flckering Reducting the flicker
level to almost zero,Flicker Safe helps you
protect your eyes from exhausting flickers

Size (Inch) 34" Curved
Panel Type IPS
Color Gamut (CIE1931) sRGB 99%
Color Depth(Number of Colors) 10bits (8bit+FRC), 1.07B
Aspect Ratio 21:9
Resolution 3440 x 1440
Brightness(Typ.) 300(Typ), 240(min) cd/m2
Contrast Ratio(Original) 1000:1 (Typ)
Contrast Ratio (DFC) 1,000,000:1
Response Time (GTG) 5ms (High)
Viewing Angle(CR≥10) 178/178 (CR≥10)
Special Feature
Picture Mode Custom, Reader, Photo, Cinema, Dark Room 1, Dark Room 2, Color Weakness, FPS Game 1, FPS Game 2, RTS Game, Custom (Game)
Ratio Wide, Original, Cinema 1, Cinema 2, 1 : 1
HDCP version 2.2
Key Lock Yes
Response Time Control Yes
Quick Charge Yes
Game Mode Yes
DAS Mode Yes
Black Stabilizer Yes
Flicker Safe Yes
Smart Energy Saving Yes
Automatic Standby Yes
Reader Mode Yes
Six Axis Control Yes
Super + resolution Yes
Color Calibrated Yes
Dual Controller Yes
Screen split Software Yes
My Display Preset Software Yes
OnScreen Control Software Yes
Dual EDID (H/W) Yes
One Click Stand Set-up Yes
Input / Output
HDMI 2 (ver2.0)
- H-Frequency(HDMI) 30 ~ 90KHz
- V-Frequency(HDMI) 56 ~ 75Hz
DisplayPort 1 (ver1.2)
- H-Frequency(DisplayPort) 30 ~ 90KHz
- V-Frequency(DisplayPort) 55 ~ 75Hz
USB Type-C Yes
- H-Frequency 30 ~ 90KHz
- V-Frequency 55 ~ 75Hz
USB Down-stream 2 (USB3.0) * included Quick Charge for port 1
Headphone Out Yes
HDMI / DP 55~75Hz (DP Only)
Type MaxxAudio
Audio output 7W × 2
Design - Stand
Tilt (Angle) -5°~20°
Height Adjustable Stand Max. 110mm
Type Adapter
Input 100~240Vac, 50/60Hz
Power Consumption
Normal On(EPA Typ.) 48W
Power Save/Sleep Mode(Max) 1.2W
UL (cUL) Yes
CCC (for China) Yes
BSMI (for Taiwan) Yes
ErP Yes
Windows Yes
DisplayPort Yes
Dimension (W*D*H)(mm)
Set (with Stand) 817.6 × 259.4 × 482.8 (Down)
817.6 × 259.4 × 592.8 (Up)
Set (without Stand) 817.6 × 88.7 × 360.8
Weight (KG)
with Stand 8.4
without Stand 6.4
Standard Accessory Power Cord, HDMI Cable, DisplayPort Cable, USB Type-C Cable, USB Type-A to C Gender, Cable holder
Wall Mount (Optional)
Model LSW140B
VESA Standard 100 × 100


Simply choose a support option from the icons below:

  • Phone

    Call an LG Support Representative on:

    Hong Kong:(852) 3543-7777

    Macau:(853) 0800-498

    Monday to Friday : 09:00 to 19:00
    Saturday - Sunday : Close
    Public Holidays: Close