LG 55TR3BG-B Interactive Digital Touch Board


Key Feature:

  • Brightness (w/ Glass) : 311 nit (w/o Glass, Typ.)
  • Touch Type : IR
  • Multi Touch Point : Max 20 Points
  • Interface : HDMI (3), HDCP2.2/1.4, RGB, Audio In, RS232C In, RJ45(LAN), USB3.0 Type A (3), USB2.0 Type A (3), HDMI Out (1), Audio Out / Optical Output, Touch USB (2)

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  • Delivery in 2-4 working days
  • 3 years warranty
LG 55TR3BG-B Interactive Digital Touch Board

True Interactivity
Bringing People Together

* All images are intended to help you understand, and there may be some differences in practical use.


Multi Touch & Writing

The TR3BG series can simultaneously use up to 20 points of multi touch. This function offers a lifelike board writing experience and makes collaboration much easier.


ScreenShare Pro Upgrade

With the newly upgraded ScreenShare Pro, which enables to show a maximum of six shared screens or a file on a screen in real-time, it has enhanced usability by allowing users to share Chromecast mirroring on the same network without any application.


Air Class

Air Class supports connecting up to 30 students and offers interactive meetings for all mobile devices on the same network, providing a variety of tools such as voting, answering, and sharing project texts.


DPM (Display Power Management)

By activating DPM function, the display can be set to be on only when there is an input signal, which enables more efficient power management.


Annotation Upgrade

At annotation tool mode, ‘Un-do’ and ‘Re-do’ functions provide enhanced user experience. (Annotation tool can be used on any source.)


Web Browser

The TR3BG series supports the web browser in the Android OS, so you can search the web easily and quickly, without connecting to an external desktop.


All-in One

The TR3BG series integrates both Android OS and Free apps into a high performance SoC, without a PC.


Built-in OPS Slot

The TR3BG series supports OPS slots, allowing you to easily and conveniently mount OPS desktop at the back of the digital board without the hassle of connecting to an external desktop, offering you more expanded functions.


USB Block

The USB Block Mode that helps secure and prevent data from being copied into unauthorized devices in advance, which is essential for being used in space where security is critical.


Secure Mode

Secure Mode blocks unauthorized contents to be shown via sharing screen function in various devices. The preloaded applications related to share screens will be hidden from menu. Secured mode disables screen mirroring options for SSP (Screen Share Pro). It helps prevent unauthorized access to your IDB.


Partial Capture

Users can select the desired area of the screen to crop the image and store that in internal memory. Also, TR3BG allows that send cropped images directly to email or note apps.


Bluetooth Connectivity

TR3BG supports Bluetooth to connect wirelessly to various devices such as speaker, mouse, keyboard, etc. This is optimized for building a hybrid environment so that online and offline meeting and class can proceed without problems.


PIP Support

PIP function enables IDB to display multiple kinds of content while the android content remains in view. So it is possible to see and work on multiple tasks with additional input.

* PIP function is provided in app form.
* It can only be changed to the specified size.


Real-time ConnectedCare Service

Maintenance is easy and fast with the optional ConnectedCare* service, a cloud service solution provided by LG. It remotely manages the status of displays in client workplaces for fault diagnosis and remote-control services, ensuring the stable operation of clients’ businesses.

* The availability of the “ConnectedCare” service differs by region, so please contact the LG sales representative in your region for more details.



  • Screen Size 55"
  • Panel Technology IPS
  • Back Light Type Direct
  • Aspect Ratio 16 : 9
  • Native Resolution 3,840 x 2,160 (UHD)
  • Refresh Rate 60Hz
  • Brightness w/o Glass : 411 nit (Max.), 311 nit (Typ.)
    w/ Glass : 380 nit (Max.), 280 nit (Typ.)
  • Contrast Ratio 1,200:1
  • Color gamut NTSC 68%
  • Viewing Angle (H x V) 178 x 178
  • Response Time 8ms (G to G)
  • Life Time (Typ.) 30,000 Hrs (Min.)
  • Operation Hours (Hours / Days) 16 / 7
  • Portrait / Landscape No / Yes

Mechanical Specification

  • Bezel Color Black
  • Bezel Width 18.9 / 18.9 / 18.9 / 45.7 mm
  • Weight (Head) 27 Kg
  • Packed Weight 45.7 Kg
  • Monitor Dimension (W x H x D) 1,271 x 774 x 84 mm
  • Carton Dimensions (W × H × D) 1,450 x 1,015 x 225 mm (Box outer size)
  • VESA™ Standard Mount Interface 400 x 200

Key Feature (Hardware)

  • Internal Memory 16 GB
  • Wi-Fi Built-in (Slot type)
  • Local Key Operation Yes
  • Power Indicator Yes

Key Feature (Software)

  • webOS ver. Android 8.0
  • Screen Share Yes (Screenshare pro)

Environment Conditions

  • Operation Temperature 0 °C to 40 °C
  • Operation Humidity 10% to 80%


  • Power Supply AC 100-240V~, 50/60Hz
  • Power Type Built-In Power

Power Consumption

  • Typ. 125 W
  • Max. 259 W
  • DPM 0.5 W ↓
  • Power off 0.5 W ↓
  • BTU (British Thermal Unit) 427 BTU/Hr (Typ.), 884 BTU/Hr (Max.)

Standard (Certification)

  • SafetyCB / NRTL
  • EMCFCC Class “A” / CE
  • ErPYes

OPS Compatibility

  • OPS Type CompatibleYes (Slot)
  • OPS Power Built InYes


  • InputHDMI (3), HDCP2.2/1.4, RGB, Audio In, RS232C In, RJ45(LAN), USB3.0 Type A (3), USB2.0 Type A (3)
  • OutputHDMI Out (1), Audio Out / Optical Output, Touch USB (2)


  • SpeakerYes


  • OSDEnglish, Simplified Chineses, Catalan, Czech, Denmark, Arabic (Egypt), Finnish, French, German, Greek, Italian, Japanese, Korean, Netherlands (Dutch), Norwegian, Polski, Portugues (Europe), Portugues (Brazil) Romanian, Russian, Spanish, Swedish, Turkish, Ukrainian, Traditional Chinese, Hungarian


  • BasicPower Cord 3m x 1, USB Cable (Type A-Type B) 5m x 1, HDMI Cable 3m x 1, Writing Pen (2pcs), User Manual, QSG, Carton Box, Remote Controller (include battery 2ea), Wifi module


  • Available Object Size for Touch Ø3 mm ↑
  • Reponse Time (Based on 'Paint' app on Windows 10 PC)60 ms ↓ (Android) / 100 ms ↓ (Windows)
  • Accuracy ±1.5 mm
  • Interface USB 2.0
  • Protection Glass Thickness 3T (Anti-Glare)
  • Protection Glass Transmission 87%
  • Operating System Support Windows 7 / 8 / 10 / WindowsXP / Linux / Mac/ Android (WindowsXP / Linux / Mac Support one point touch)
  • Multi Touch Point Max. 20 Points

Android System

  • SoCDual core A73 + Dual core A53
  • GPUDual Core Mail G51
  • Internal MemoryStorage : 16 GB
    RAM : 3 GB
  • Wi-Fi 802.11a/b/g/n/ac
  • LAN Gigabit LAN
  • Bluetooth Bluetooth 4.0