LG 55UL3J-N (Discontinued) · Replacements in Qatar

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

Overview

The LG 55UL3J-N is a 55-inch UHD signage display with an IPS panel, built-in speaker, built-in Wi-Fi and webOS 6.0. LG has discontinued this model, so SmartRooms Qatar can quote a current equivalent or a compatible replacement for the same role. It suits lobbies, reception areas and corridors in Doha offices, clinics and retail sites that need a 16/7 display with remote monitoring.

What the 55UL3J-N is and where it stands

The LG 55UL3J-N is a 55-inch signage display from the UL3J series, built around a 3840x2160 IPS panel. LG has discontinued this model. If you already run one, or you are comparing it with newer displays, SmartRooms Qatar can quote a current equivalent or a compatible replacement that suits the same mounting and software setup.

Picture and running-hours facts that matter

The panel delivers 3840x2160 resolution at a 16:9 aspect ratio with a 178 x 178 viewing angle, so content stays readable for people standing to the side of a lobby or walking along a corridor. Typical brightness is 400 nit, the contrast ratio is 1,300:1 and the colour gamut is listed as DCI 80%. The display is rated for 16/7 operation with a minimum life time of 30,000 hours. Portrait and landscape orientation are both supported, which suits digital menus and wayfinding screens.

Software, connectivity and remote control

webOS 6.0 with 8GB internal memory for local content scheduling and group management.
Three HDMI inputs supporting HDCP 2.2/1.4, plus one RS-232C input and one RS-232C output for control chaining.
Built-in Wi-Fi for wireless content distribution and firmware updates over the same network.
Remote monitoring with SNMP, Wake on LAN and status mailing for facilities teams.

Two USB 2.0 Type A ports support USB plug-and-play and sensor connections. Crestron Connected is listed as supported for AV control integration. Cisco certification is listed by the manufacturer as to be confirmed, so ask us to verify it before you specify this model for a video conferencing room.

Where it fits in Qatar

A hotel lobby in West Bay can use a 55-inch landscape screen for event listings and directions, relying on the built-in speaker for short announcements without a separate audio system. A clinic in Al Sadd can place a display in its waiting area, where the auto brightness sensor adjusts the screen to changing daylight. A government office in Msheireb can set the on-screen menu to Arabic, which is among the listed OSD languages, while staff manage content in English.

Qatar summers regularly exceed 45 °C, while this model is rated for 0 to 40 °C operation with 10 to 80 percent humidity, and portrait use is rated only to 35 °C. Install it indoors in air-conditioned space and confirm the placement with the SmartRooms Qatar team before fixing it near windows or entrances.

What to plan before ordering

The VESA mount pattern is 300 x 300, so confirm the wall bracket or stand before ordering.
The head weighs 14.0 kg and the packed weight is 18.8 kg, which calls for two people to lift it.
Typical power draw is 105 W and maximum is 160 W, with a built-in power supply rated for 100-240V, 50/60Hz.
The box includes the remote controller with two batteries, power cord, regulation book, phone-to-D-Sub9 cable and cable holder. A wall mount is not listed.

Send your site plan, mounting position and quantity to SmartRooms Qatar and we will arrange a free site survey before installation. To request a quote for this model or a current equivalent, contact our team. Quotations are usually issued within one working day, and we accept LPOs, government tenders and bank transfer or cheque payments.

Highlights

55-inch IPS panel at 3840x2160 UHD resolution
webOS 6.0 with 8GB internal memory
Built-in Wi-Fi, built-in speaker and temperature sensor
Three HDMI inputs with HDCP 2.2/1.4 support
Crestron Connected supported; Cisco certification listed as TBD
Rated 0 to 40 °C operation and 16/7 operating hours

Estimated timeline

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

Specifications

113 specifications · Source: manufacturer · checked Oct 2026

PANEL17

Screen Size: 55"
Panel Technology: IPS
Back Light Type: Direct
Aspect Ratio: 16:9
Native Resolution: 3840x2160 (UHD)
Refresh Rate: 60Hz
Brightness: 400nit (Typ.)
Contrast Ratio: 1,300:1
Dynamic CR: 1,000,000:1
Color Gamut: DCI 80%
Viewing Angle(H x V): 178 x 178
Color Depth: 10bit, 1.07Billon colors
Response Time: 8ms (G to G)
Surface Treatment(Haze): 3%
Life time: 30,000Hrs (Min)
Operation Hours (Hours/Day): 16/7
Portrait / Landscape: Yes / Yes

CONNECTIVITY14

Input - Digital - HDMI: Yes(3), HDCP2.2/1.4
Input - Digital - DP: No
Input - Digital - DVI-D: No
Input - Analog - RGB: No
Input - Audio In: No
Input - RS232C IN: Yes(1), 4pin Phone-jack
Input - RJ45(LAN): Yes(1)
Input - IR IN: No
Input - USB: USB2.0 Type A(2)
Output - DP Out: No
Output - Audio Out: Yes(1)
Output - Externel Speaker Out: No
Output - External Control - RS232C OUT: Yes(1), 4pin Phone-jack
Output - Externel Speaker Out - RJ45(LAN): No

MECHANICAL SPECIFICATION10

Bezel Color: Ashed Blue
Bezel Width: Off : 6.9/6.9/6.9/18.4 On : 12.8/12.8/12.8/19.9
Weight(Head): 14.0
Weight(Head+Stand): -
Packed Weight: 18.8
Monitor Dimension(W x H x D): 1235 x 715 x 57.5
Monitor Dimensions with Stand(W x H x D): -
Carton Dimensions(W x H x D) (Box outer size): 1360 x 810 x 162
Handle: No
VESA™ Standard Mount Interface: 300 x 300

KEY FEATURE45

HW - Internal Memory: 8GB
HW - Wi-Fi - Built-in: Yes
HW - Sensor - Temperature Sensor: Yes
HW - Sensor - Auto Brightness sensor: Yes
HW - Sensor - Pixel sensor: No
HW - Sensor - Proximity Sensor: No
HW - Sensor - Current Sensor: No
HW - Power Indicator: No
HW - Local Key Operation: Yes (Power On/Off only)
HW - FAN: No
SW - webOS ver.: webOS6.0
SW - Embedded CMS - Local Contents Scheduling: Yes
SW - Embedded CMS - Group Manager: Yes
SW - USB Plug & Play: Yes
SW - Fail over: Yes
SW - Background Image - Booting Logo Image: Yes
SW - Background Image - No Signal Image: Yes
SW - Sync Mode - RS-232C Sync: Yes
SW - Sync Mode - Local Network Sync: Yes
SW - Multi-screen - PIP: No
SW - Multi-screen - PBP: No
SW - Screen Share: Yes
SW - Video Tag: Yes(4, Max One HDMI input)
SW - Play via URL: Yes
SW - Rotation - Screen Rotation: Yes
SW - Rotation - External Input Rotation: Yes
SW - Gapless Playback: Yes
SW - Tile Mode Setting: No
SW - Setting Data Cloning: Yes
SW - SNMP: Yes
SW - ISM Method: Yes
SW - Auto Set ID: Yes
SW - Status Mailing: Yes
SW - Control Manager: Yes
SW - 3rd Party Compatibility - Cisco certi: TBD (Oct~)
SW - 3rd Party Compatibility - Crestron Connected: Yes
SW - Power - Smart Energy Saving: Yes
SW - Power - PM mode: Yes
SW - Power - Wake on LAN: Yes
SW - Power - Network Ready: Yes
SW - Beacon: Yes
SW - HDMI-CEC: Yes
SW - SI Server Setting: Yes
SW - webRTC: Yes
SW - Pro:Idiom: Yes

ENVIRONMENT CONDITIONS2

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

POWER2

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

POWER CONSUMPTION6

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

SOUND1

Speaker: Yes

CERTIFICATION4

Safety: CB
EMC: FCC Class "A" / CE
ErP / Energy Star: Yes(OldErP for Jordan)/Yes
ePEAT(US only): No

OPS Compatibility2

OPS type compatible: No
OPS Power built in: No

SOFTWARE COMPATIBILITY7

SuperSign CMS: Yes
SuperSign Control / Control+: Yes / Yes
SuperSign WB: Yes
SuperSign Media Editor: Yes
Promota: Yes (Not available for EU/CIS)
Mobile CMS: No
Signage 365 Care: Yes

Language1

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

ACCESSORY1

Basic: Remote Controller(include battery 2ea), Power Cord, Regulation Book, Phone to D-Sub9 Gender, Cable Holder

SPECIAL FEATURE1

Overlay Touch Compatibility: No

Downloads

4 files from the manufacturer

PDF Manuals & guides 43505586UL3J-NP-BP_ARA.pdf 2.3 MB PDF Manuals & guides MFL71830201_43_50_55_65UL3J_QSG.pdf 2.8 MB PDF Manuals & guides · Opens on manufacturer site SAC38517203_ENG_250428.pdf 1.7 MB URL Software & firmware · Opens on manufacturer site Software & Drivers (support page)

Questions about 55UL3J-N

Is the LG 55UL3J-N still available from SmartRooms Qatar?

LG has discontinued the 55UL3J-N, so we no longer quote this exact model as a new product. Instead we quote a current equivalent or a compatible replacement. Send us the screen size, quantity and content setup, and our team will confirm the closest option in a quotation usually issued within one working day.

What is this 55-inch display best used for?

It suits reception areas, lobbies, corridors and waiting rooms where a 55-inch screen shows menus, wayfinding, announcements or event listings. The 3840x2160 IPS panel and 178 x 178 viewing angle keep content readable from the side, and the 16/7 operating rating matches busy business hours.

Can I update content over the network without visiting each screen?

Yes. The display has built-in Wi-Fi, and the data lists content distribution and firmware updates over the same network. Local content scheduling, group manager and SuperSign CMS compatibility let you manage several units from one place, which helps a multi-branch retailer or school with screens in several rooms.

What operating temperature does it tolerate in Qatar?

The display is rated for 0 to 40 °C operation and 10 to 80 percent humidity, and portrait use is rated only to 35 °C. Qatar summer temperatures often pass 45 °C, so install it indoors in air-conditioned space and avoid direct sun through glazing. Confirm the location with the SmartRooms Qatar team before mounting.

Can it be mounted in portrait for a wayfinding totem in a shopping mall?

It supports both portrait and landscape orientation, but the portrait operating range is 0 to 35 °C rather than 0 to 40 °C. For a mall totem in Msheireb or West Bay, plan airflow and cooling carefully, and have the installer check the enclosure and surrounding temperature before final placement.

Which video and data inputs does it have?

It has three HDMI inputs supporting HDCP 2.2/1.4, one RJ45 LAN port, two USB 2.0 Type A ports, one RS-232C input and one RS-232C output, plus one audio output. It has no DisplayPort, DVI-D, analog RGB, audio input or IR input, so check your source devices before ordering.

Will it work with a video conferencing system?

The data lists Crestron Connected as supported for AV control integration. The Cisco certification is listed as to be confirmed by the manufacturer, so do not assume Cisco compatibility. If the display is for a meeting room in Education City or a government office, we will confirm the integration path before the quotation.

Does it need an OPS computer or an external media player?

The display has no OPS slot and no OPS power, so it cannot host an OPS media player. You can connect an external player through HDMI or USB, or use the webOS platform for content playback. Tell us which content source you plan to use so the quotation includes the right cables and accessories.

Does the power supply suit Qatar mains?

The built-in power supply is rated for AC 100-240V at 50/60Hz, which covers Qatar's 240V 50Hz mains. Typical consumption is 105 W and maximum is 160 W, and smart energy saving mode is listed at 73.5 W. Your electrician should still confirm the dedicated socket and circuit during installation.

What comes in the box, and what do I need to buy separately?

The box includes the remote controller with two batteries, a power cord, a regulation book, a phone-to-D-Sub9 cable and a cable holder. A wall mount is not listed, so you will need a bracket compatible with the 300 x 300 VESA pattern. A free site survey helps confirm the right mount and cable route.

Can a school order several units through an LPO?

Yes. SmartRooms Qatar accepts LPOs, and a school in Al Wakrah or Doha can order several units against one purchase order, with a quotation usually issued within one working day. Include the quantity, mounting positions and cable routes in your request so the quotation matches the room plan.

Does the auto brightness sensor help in rooms with changing daylight?

Yes. The display includes an auto brightness sensor and a temperature sensor. The auto brightness sensor adjusts the screen to ambient light, which helps a clinic waiting area in Al Sadd or a hotel lobby keep content comfortable to view as sunlight changes through the day.

Is the display suitable for an Arabic-English office?

The on-screen menu supports Arabic alongside English, French and many other languages, so staff can set up the display in their preferred language. Your content can be created in both Arabic and English, and SmartRooms Qatar can advise on the layout when we prepare your quotation for a government or private office.