LG 55UL3J (Discontinued) · Replacements in Qatar

Name: LG 55UL3J 55-inch webOS UHD Signage Display
Brand: LG
SKU: lg-55ul3j
Availability: Discontinued

Overview

The LG 55UL3J is a 55-inch UHD signage display with an IPS panel, 3840 x 2160 resolution and 400 nit typical brightness, running webOS 6.0 with built-in Wi-Fi and three HDMI inputs. It suits offices, schools and reception areas in Doha that need a clear, narrow-bezel screen for information and meeting content. LG has discontinued this model, so SmartRooms Qatar can quote a current equivalent or a compatible replacement.

The LG 55UL3J is a 55-inch UHD signage display from LG's UL3J series. LG has discontinued this model, so this page serves organisations that already run one, buyers comparing it with newer displays, and anyone who needs a replacement for the same role. SmartRooms Qatar can quote a current equivalent or a compatible replacement and check it against your existing installation.

A 55-inch UHD panel built around webOS 6.0

The panel has a native resolution of 3840 x 2160 and uses IPS technology, which keeps colours and text readable when viewers stand off to the side. The viewing angle is rated at 178 degrees horizontally and vertically. Typical brightness is 400 nit with a 1,300:1 contrast ratio, and the panel shows 1.07 billion colours at a 60 Hz refresh rate.

Each unit runs the webOS 6.0 platform and includes 8GB of internal eMMC storage, built-in Wi-Fi and Bluetooth, a temperature sensor and an auto brightness sensor. The 10W x 2 built-in speakers suit short announcements; they are not a substitute for a conference audio system.

Connections and control for networked content

Three HDMI inputs with HDCP 2.2 and 1.4 support
One RJ45 LAN input for wired network control and content
RS232C input and output for serial control from a control system
Two USB 2.0 Type A ports for media and external sensors

The display works with SuperSign CMS, SuperSign Control+ and SuperSign WB, and its web-based remote monitoring lets administrators check status and make adjustments from a phone or PC on the network. The data also lists Crestron Connected support and Cisco certification, so it can join an AV control system or a Cisco video conferencing setup. It has no HDMI output, no DisplayPort and no touch function, so it is a viewing display rather than an interactive one.

Where this model fits in Qatar

A private school in Al Wakrah replacing paper timetables in a corridor could mount one of these panels in portrait orientation, showing timetables, events and announcements with its on-screen menus set to Arabic or English. An office reception in West Bay could use it in landscape to show visitor information and a company profile, updated from the head office over the network. A boardroom in Msheireb or Lusail could use the RS232C connection and Cisco-listed compatibility to tie it into a meeting room control system.

Planning heat, power and mounting before you order

The operating temperature range is 0 to 40 °C, or 0 to 35 °C in portrait mode, with 10 to 80 percent humidity. Qatar summers can exceed 45 °C, so this model belongs in an air-conditioned space away from windows, direct sun and entrances. The built-in power supply accepts 100 to 240 V AC at 50/60 Hz, with typical consumption of 105 W and a maximum of 160 W.

For wall mounting, the VESA pattern is 300 x 300 mm, the monitor measures 1235 x 715 x 57.5 mm, and the head weighs 14 kg (18.8 kg packed). SmartRooms Qatar offers free site surveys to confirm the wall, bracket and cable route before installation. Each unit ships with a remote controller and two batteries, a power cord, a phone-to-D-Sub9 cable, a cable holder and a regulation booklet. Organisations buying several units, such as schools or ministry departments, can issue a purchase order (LPO) against one quotation.

To check whether this model or a current equivalent suits your site, request a quote from SmartRooms Qatar with the number of displays, the room type and whether the wall bracket and network points are already in place. Our team usually responds with a quotation within one working day.

Highlights

55-inch IPS panel with 3840 x 2160 native resolution
400 nit typical brightness and 1,300:1 contrast ratio
webOS 6.0 with 8GB internal storage and built-in Wi-Fi
Three HDMI inputs, RJ45 LAN, RS232C and two USB 2.0 ports
10W x 2 built-in speakers and portrait or landscape use
Discontinued by LG; request a quote for a replacement

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

135 specifications · Source: manufacturer · checked Oct 2026

LANGUAGE1

OSD: English, French, German, Spanish, Italian, Korean, Chinese(Simplified), Chinese(Original), Portuguese(Brazil), Swedish, Finnish, Norwegian, Danish, Russian, Japanese, Portuguese(Europe), Dutch, Czech, Greek, Turkish, Arabic, Polish

ACCESSORY2

Basic: Remote Controller(include battery 2ea), Power Cord, Regulation Book, Phone to D-Sub9 Gender, Cable Holder
Optional: NO

POWER2

Power Supply: AC 100-240V~, 50/60Hz
Power Type: Built-in Power

SOUND1

Speaker (Built-in): YES (10W x 2)

OPS COMPATIBILITY2

OPS Power Built-in: NO
OPS Type compatible: NO

CERTIFICATION4

EMC: FCC Class "A" / CE
ePEAT(US only): NO
ERP / Energy Star: YES(NewErP) / YES
Safety: CB / NRTL

ENVIRONMENT CONDITIONS2

Operation Humidity: 10 % to 80 %
Operation Temperature: 0 °C to 40 °C (Portrait Scene : 0 °C to 35 °C)

POWER CONSUMPTION6

BTU (British Thermal Unit): 358 BTU/Hr(Typ.), 546 BTU/Hr(Max.)
DPM: 0.5W
Max.: 160W
Power off: 0.5W
Smart Energy Saving (70%): 73.5W
Typ.: 105W

MECHANICAL SPECIFICATION10

Weight (Head): 14Kg
Bezel Color: Ashed Blue
Bezel Width: Off : 6.9/6.9/6.9/18.4mm On : 12.8/12.8/12.8/19.9mm
Carton Dimensions (W x H x D): 1360 x 810 x 162mm
Handle: NO
Monitor Dimensions (W x H x D): 1235 x 715 x 57.5mm
Monitor Dimension with Stand (W x H x D): N/A
Packed Weight: 18.8Kg
VESA Standard Mount Interface: 300 x 300 mm
Weight (Head+Stand): N/A

PANEL19

Aspect Ratio: 16:9
Back Light Type: Direct
Brightness: 400nit (Typ.)
Color Depth (Number of Colors): 1.07 Billion colors
Color Gamut: DCI 80%
Contrast Ratio: 1,300:1
Dynamic CR: 1,000,000:1
Life time: 30,000Hrs (Min.)
Native Resolution: 3840 x 2160 (UHD)
Operation Hours (Hours/Day): 16/7
Panel Technology: IPS
Portait / Landscape: YES / YES
QWP (Quarter Wave Plate): N/A
Refresh Rate: 60Hz
Response Time: 8ms (G to G)
Screen Size (Inch): 55
Surface Treatment (Haze): Haze 3%
Transparency: N/A
Viewing Angle (H x V): 178º x 178º

CONNECTIVITY19

Audio In: NO
Audio Out: YES
Daisy Chain: NO
DP In: NO
DP Out: NO
DVI-D In: NO
External Speaker Out: NO
HDMI In: YES (3ea)
HDMI In (HDCP Ver.): 2.2/1.4
HDMI Out: NO
IR In: NO
IR Out: NO
RGB In: NO
RJ45(LAN) In: YES (1ea)
RJ45(LAN) Out: NO
RS232C In: YES
RS232C Out: YES
Touch USB: NO
USB In: USB2.0 Type A (2ea)

SPECIAL FEATURE8

Conformal Coating (Power Board): YES
Direct Sunlight: N/A
IP Rating: N/A
Overlay Touch Compatibility: N/A
Power Protection: N/A
Smart Calibration: N/A
Tilt (Face down): N/A
Tilt (Face up): N/A

SOFTWARE COMPATIBILITY7

Connected Care: YES
Mobile CMS: NO
Promota: YES (Not available for EU/CIS)
SuperSign Cloud: NO
SuperSign CMS: YES
SuperSign Control+: YES
SuperSign WB: YES

FEATURE - HARDWARE13

Acceleration(Gyro) Sensor: NO
Auto Brightness Sensor: YES
BLU Sensor: NO
Current Sensor: NO
FAN (Built-in): NO
Humidity Sensor: NO
Internal Memory (eMMC): 8GB
Local Key Operation: YES
Pixel Sensor: NO
Power Indicator: NO
Proximity Sensor: NO
Temperature Sensor: YES
Wi-Fi/BT (Built-in): YES

FEATURE - SOFTWARE39

Auto Set ID: YES
Backlight Sync: NO
Beacon: YES
Booting Logo Image: YES
Brightness Compensation: NO
Cisco Certification: YES
Control Manager: YES
Crestron Connected: YES
External Input Rotation: YES
Fail over: YES
Gapless Playback: YES
Group Manager: YES
HDMI-CEC: YES
ISM Method: YES
Local Contents Scheduling: YES
Local Network Sync: YES
Network Ready: YES
No Signal Image: YES
OS Ver. (webOS): webOS 6.0
PBP: NO
PIP: NO
Play via URL: YES
PM mode: YES
Pro:Idiom: YES
RS232C Sync: YES
Scan Inversion: NO
Screen Rotation: YES
Screen Share: YES
Setting Data Cloning: YES
SI Server Setting: YES
Smart Energy Saving: YES
SNMP: YES
Status Mailing: YES
Tile Mode Setting: YES
USB Plug & Play: YES
Video Tag: YES (4 Video Tag)
Wake on LAN: YES
webRTC: YES
W/B Setting by Grey scale: NO

Downloads

5 files from the manufacturer

PDF Manuals & guides 435055657586UL3J-BP_Arabic.pdf 2.3 MB PDF Manuals & guides ENG.pdf 7.5 MB PDF Manuals & guides MFL71799101_01_211019.pdf 8.1 MB PDF Manuals & guides SAC38517203_ENG_250428.pdf 1.7 MB URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about 55UL3J

Is the LG 55UL3J still sold by LG?

No. LG has discontinued the 55UL3J, so new units of this exact model may be hard to source. SmartRooms Qatar can quote a current equivalent or a compatible replacement. To match it correctly, share your current wall bracket, network points, control system and number of displays, and we will confirm the closest option before you issue a purchase order.

What is the 55UL3J best used for?

It suits indoor information displays such as reception areas, corridors, lobbies and meeting room signage. The 55-inch 3840 x 2160 IPS panel, 400 nit typical brightness and 178-degree viewing angle keep text readable from across a room. Portrait or landscape mounting covers both wayfinding and menu-style content. Because it is a viewing display, it has no touch function.

Does it have Arabic on-screen menus?

Yes. The on-screen display language list includes Arabic alongside English, French, Spanish, Chinese, Russian and Japanese. This helps Qatari offices and schools that work in Arabic and English side by side set up the display for their local team. Content text depends on your own media files, so test your Arabic slides on the unit before rollout.

Can it be installed near a window or in an outdoor area in Qatar?

No, not in unconditioned or outdoor spaces. The operating temperature range is 0 to 40 °C, or 0 to 35 °C in portrait mode, with humidity from 10 to 80 percent. Qatar summers can exceed 45 °C and dust storms are common, so install it indoors in air-conditioned areas, away from windows and direct sun. Confirm the exact site with SmartRooms Qatar before ordering.

What electrical supply does it need?

The built-in power supply accepts 100 to 240 V AC at 50/60 Hz, which covers Qatar's 240 V, 50 Hz mains. Typical consumption is 105 W and the maximum is 160 W, with 0.5 W in power-off mode. Plan a socket near the mounting position before installation, and have a qualified electrician confirm the cable route and socket type, especially when several displays share one wall.

How do I manage content across several displays on one school campus?

Connect each unit to the network through its RJ45 LAN port or built-in Wi-Fi, then manage playlists with SuperSign CMS, Control+ or WB, as listed in the software compatibility data. A private school with several buildings can schedule announcements from one central location, while local staff use the web-based remote monitoring to check each unit's status. Plan IP addresses before installation day.

Can one person wall-mount it in a Lusail office?

Plan for at least two people. The head weighs 14 kg and the packed unit weighs 18.8 kg. The VESA pattern is 300 x 300 mm and the monitor measures 1235 x 715 x 57.5 mm. Before drilling into a block or plasterboard wall in Lusail or The Pearl, SmartRooms Qatar recommends a free site survey to confirm wall strength, bracket type and cable routing.

Does it work with boardroom control and video conferencing systems?

The data lists Crestron Connected support and Cisco certification, along with RS232C input and output for serial control and an RJ45 LAN port. For a boardroom in Msheireb that uses a Cisco video system, these connections let the display join the meeting room setup. Confirm the exact control commands and integration requirements with your system provider before purchase.

How loud are the built-in speakers?

Each unit has two built-in 10 W speakers, and there is no external speaker output. They suit short announcements, ambient audio and simple content playback in reception areas and corridors. For large lecture halls or boardrooms, plan a separate audio system, because the built-in speakers are not designed to replace one.

What ports does it have?

It has three HDMI inputs with HDCP 2.2 and 1.4, one RJ45 LAN input, RS232C input and output, two USB 2.0 Type A ports and an audio output. It has no HDMI output, DisplayPort, DVI-D, RGB input, touch USB port or OPS slot. You cannot pass the signal on to a second display, so plan your source devices and cabling around these inputs.

What should I look for in a replacement?

Start from this model's core features: a 55-inch UHD IPS panel, portrait and landscape use, three HDMI inputs, RS232C control, network content management and built-in speakers. Check the operating temperature, power and mounting needs of your room. SmartRooms Qatar can quote a current equivalent or compatible replacement and explain any differences, such as touch support or OPS compatibility.