LG 55" 4K UHD Touchscreen Commercial Monitor - 55TR3DK-B

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LG Electronics SKU: 55TR3DK-B
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Sale price$1,875.00 Regular price$2,500.00


The LG CreateBoard TR3DK-B Series 55" 4K UHD Whiteboard Monitor can simultaneously use up to 40 points of IR multi-touch input. This function offers a lifelike board writing experience and makes collaboration easier. Plus, get clear imaging with 390 nits of brightness and a 1200:1 static contrast ratio. Interfaces include HDMI, VGA, 3.5mm analog audio, RS232C control, RJ45 Gigabit Ethernet, USB-A 3.0 and 2.0, and USB-C 3.0 with power delivery and DisplayPort Alt Mode.

Multi-Touch and Writing Functionality The TR3DK-B series can simultaneously use up to 40 points of multi-touch input. This function offers a lifelike board writing experience and makes collaboration easier. ScreenShare Pro Upgrade ScreenShare Pro shows a maximum of six shared screens or a file on the screen in real-time and allows users to share screens via Chromecast, Airplay, and Miracast mirroring on the same network. Note: ScreenShare Pro is a Wi-Fi based software and is supported by separated applications. All devices should be connected within the same network. Air Class Air Class supports connecting up to 30 students and offers interactive classes by using mobile devices equipped with web browsers, providing a variety of tools such as voting, answering, and sharing project texts. Display Power Management (DPM) By activating DPM functionality, power can be set to activate only when an input signal is detected, enabling more efficient power management. Annotation Upgrade An annotation tool mode with undo and redo functions provides enhanced use. Web Browser The TR3DK-B series supports web browsing in Android OS 9.0 and later, so you can search the web easily and quickly, without connecting to an external desktop. All-in-One Performance The TR3DK-B series integrates both Android OS and free apps into a high performance SoC, without requiring a host computer. Secured Mode Secured Mode disables screen mirroring options for ScreenShare Pro, which is an application that enables screen sharing between mobile devices and the display, to prevent any unauthorized contents to be shown via screen sharing functions in various devices. Built-In OPS Slot The TR3DK-B series has an OPS slot, allowing you to easily and conveniently mount an OPS computer module at the back of the interactive digital board with internal power delivery. USB Block The USB Block Mode helps secure and prevent data from being copied into unauthorized devices in advance, which is essential for environments where security is critical. Partial Capture Users can select the desired area of the screen to crop the image and store it in the display's internal memory. Also, TR3DK-B allows you to send cropped images directly to email or note apps. Bluetooth Connectivity This display supports Bluetooth to connect wirelessly to various devices such as speakers, a mouse, keyboard, and more. Construct a hybrid environment so online and offline meetings and classes can proceed with ease. Real-Time ConnectedCare Service Maintenance is easy and fast with the ConnectedCare service, available separately. This cloud service solution from LG remotely manages the status of displays in client workplaces for fault diagnosis and remote-control services, ensuring the stable operation of clients' businesses. Note: The availability of the ConnectedCare service may differ by region.
  • Digital Signage Display - Ideal for rack, passageway, booth or display counter
  • Features a 4k Ultra HD 3840 x 2160 resolution
  • 55" Signage Display - Designed for unwavering quality and dazzling picture clarity
  • 2160p 4K UHD - Regardless of wherever or whenever the content is watched and no matter how detailed it is, this signage system is made to impress its viewers
  • Experience luminescent visual images with LCD display
  • LED backlight enhances display performance that delivers an outstanding color range and contrast ratios

LG TR3DK Specs

Size 55"
Panel Type IPS-Type LCD
Aspect Ratio 16:9
Display Orientation Landscape
Resolution 3840 x 2160
Maximum Brightness 390 nits / cd/m2
Lighting System Direct LED
Contrast Ratio 1200:1
Response Time 8 ms (GtG)
Refresh Rate 60 Hz
Bit Depth / Color Support 8-Bit+FRC (1.07 Billion Colors)
Color Gamut 72% NTSC
Viewing Angle (H x V) 178 x 178°
Pixels Per Inch (ppi) 80 ppi
Finish Anti-Glare / Matte
Touchscreen Technology Infrared (IR)
Multi-Touch Points 40
Hardness Rating 7H
Haze Level 25%
TV Tuner No
Inputs Front:
1 x HDMI
2 x HDMI
1 x DE-15/DB-15 (VGA)
1 x 1/8" / 3.5 mm (Analog Audio)
Outputs Side:
1 x HDMI
1 x TOSLINK Optical (Digital Audio)
1 x 1/8" / 3.5 mm (Analog Audio)
HDCP Support Yes, Version 2.2
Wi-Fi Wi-Fi 6 (802.11ax)
Bluetooth 5.0
Connection Protocols AirPlay, Chromecast built-in
USB Ports Side:
2 x USB-B 3.0 / 3.1/3.2 Gen 1 (Touchscreen Control)
2 x USB-A 3.0 / 3.1/3.2 Gen 1
1 x USB-A 2.0
1 x USB-C Unspecified Version (Video/Power)
Ethernet Ports 2 x RJ45 Gigabit Ethernet
Other I/O 1 x DE-9/DB-9 Serial (RS-232C)
Number of OPS/Expansion Slots 1
Lighting Lifespan 30000 Hours
Built-In Speakers Yes, 2 x 15 W
Smart TV webOS
CPU Cortex A55 Quad-Core
GPU ARM Mali G52
Storage 32 GB
OS Compatibility Windows XP or Later
Windows 7 to 10
*As of May, 2023: Check with manufacturer for the most up-to-date compatibility
Mobile App Compatible Yes
*As of May, 2023: Check with manufacturer for the most up-to-date compatibility
Media Card Reader None
Built-In Mic No
Supported File Formats
Supported Languages Arabic
Brazilian Portuguese
Simplified Chinese
Traditional Chinese
Operating Temperature 32 to 104°F / 0 to 40°C
Operating Humidity 10 to 90%
Power Consumption Typical: 170.0 W
Maximum: 395.0 W
Standby: 0.5 W
IK Rating None
Packaging Info
Package Weight 70.5 lb
Box Dimensions (LxWxH) 55 x 33.75 x 8.5"

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  • Most in-stock orders placed Monday-Friday before 1PM PST ship the same day. Orders placed after 1PM will ship the next day of business. General restrictions apply; please see our full shipping policy here.
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