LG 55″ 55TR3BG Interactive Digital Board


Key Feature

  • Brightness : 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)
When the woman marks it on the digital board, it is also displayed on the children's electronic device screens (at the same time).


True Interactivity for Bringing People Together

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

Three children are drawing on the TR3BG series at the same time.


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.

The screens of students' laptops and teacher's mobile are being shared to the display.


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.

A teacher is having a class and the screen on the display, is being shared to each student's laptop.


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.

A- Display Power Management function to manage power more efficiently.   B- Comparison of DPM whether there is an input or not.


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.

Engineering Drawing class with TR3BG-BX's annotation tool using Un-do and Re-do functions.


Annotation Upgrade

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

A woman is choosing a screen by using the web browser.


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.

System-on-a chip integrated with Android OS and free apps.


All-in One

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

OPS slot for more expanded function by mounting OPS desktop at the back of the digital board.


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 is not being able to be connected to a display for security.


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

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


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


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 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


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.

Tech Spec

  • Panel


    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
    Color Depth 10bit, 1.07Billion colors
    Response Time 8ms (G to G)
    Surface Treatment (Haze) Anti Glare, 7H (Mohs)
    Life Time (Min.) 30,000 Hrs
    Operation Hours (Hours / Days) 16 / 7
    Portrait / Landscape No / Yes
  • Mechanical Specification


    Bezel Color Black
    Bezel Width(Off Bezel) 18.9 / 18.9 / 18.9 / 45.7 mm
    Weight (Head) 27 Kg
    Packed Weight 45.7 Kg
    Monitor Dimensions (W × H × 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 16GB
    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


    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)


    Safety CB / NRTL
    EMC FCC Class "A" / CE
    ErP Yes
  • OPS Compatibility


    OPS Type Compatible Yes (Slot)
    OPS Power Built In Yes
  • Connectivity


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


    Speaker Yes
  • Language


    OSD English, 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
  • Accessory


    Basic Power 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
  • Touch


    Available Object Size for Touch Ø3 mm ↑
    Reponse Time (Based on 'Paint' app on Windows 10 PC) 60ms ↓ (Android) / 100ms ↓ (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


    SoC Dual core A73 + Dual core A53
    GPU Dual Core Mail G51
    Internal Memory Storage : 16GB
    RAM : 3GB
    Wi-Fi 802.11a/b/g/n/ac
    LAN Gigabit LAN
    Bluetooth Bluetooth 4.0