Sharp Interactive Flat Panels Current

PN-LM551

Sharp PN-LM551 55-inch Infrared Touch Display

Screen size: 55 / 138.8
Resolution: 3840 x 2160
Touch: Infrared
System: App side loading (Google CTS…

Priceon request

QuotationWithin 1 working day

DeliveryConfirmed with your quote, based on stock

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Overview

The Sharp PN-LM551 is a 55-inch 4K UHD interactive display with infrared touch that recognises up to 20 touches. It runs Android 14 on a built-in system-on-chip, so it works without a separate PC, and it offers 500 cd/m² brightness with an anti-glare coating. Built for small meeting rooms, huddle spaces and interactive signage, it suits Doha offices and schools that need a ready-to-use board. Request a quote.

What the PN-LM551 is built to do

The PN-LM551 combines a 55-inch 16:9 display, an infrared touch layer and an Android 14 computer in one unit. Users can write, annotate and open files without connecting a laptop, which suits rooms where nobody wants to spend minutes on cable setup. It belongs to Sharp's midrange collaboration range and is aimed at small meeting rooms, huddle spaces and interactive signage.

Panel and touch performance that matter in daily use

The 3840 x 2160 VA panel delivers 4K UHD detail, so small text in spreadsheets and engineering drawings stays sharp from the far end of a meeting table. Peak brightness of 500 cd/m² and an anti-glare coating help the picture stay readable in rooms with large windows or strong overhead lighting. The infrared touch layer, with zero bonding and a 3.1 mm tempered glass front, recognises up to 20 touches with an accuracy of +/- 1 mm, and it responds to fingers, gloved hands and a stylus with two tip sizes.

Palm rejection is not listed among the specifications, so teams that expect frequent palm-side writing should raise this when requesting a quote. Windows Ink is supported.

Android 14 and connecting without a PC

The built-in Android 14 system includes a whiteboard, an annotation overlay mode, MobiOffice for Office and PDF files, a web browser and the EShare app for wireless screen sharing. Staff can share from personal devices without installing apps on them or using adapters. Connectivity covers three HDMI inputs, one HDMI output, a USB-C port that carries video, data and up to 65 W of power delivery, three USB-A ports, 802.11 a/b/g/n/ac/ax Wi-Fi with WPA3 Enterprise, Bluetooth 5.3 and a 100 MBit/s LAN port. An OPS slot accepts an optional computing module, and Sharp recommends the OPS Enterprise Pro or OPS Enterprise Ultra.

Where it fits in Qatar

Government and corporate meeting rooms: a ministry or energy company in West Bay or Lusail where Arabic and English speakers meet colleagues in Doha and abroad, and a single USB-C cable from a laptop handles display, touch and charging.
Classrooms and small group rooms: a private school in Al Wakrah or a training centre in Education City where students annotate directly on the board during lessons.
Interactive signage: a hotel lobby or retail space in The Pearl or Msheireb presenting wayfinding content, with hidden side bars and application lock keeping visitors within approved screens.

Planning the installation

At 1,265 x 736 x 73 mm and 33 kg, the panel is heavy enough that wall mounting should be planned around the wall structure. It supports a 400 x 400 mm VESA pattern with M6 fixings, and Sharp lists a wall mount in its PDW S 32-65 range, plus feet and a trolley for mobile use. The bezel is 15 mm on all sides, and the panel can be used in landscape, portrait or tilted 45 degrees backwards. The operating range is +5 to +35 °C with 20 to 80% humidity, so install it in an air-conditioned room rather than a sun-facing lobby or outdoor area. The power supply accepts 100-240 V AC at 50/60 Hz, with typical consumption of 145 W. Our team offers free site surveys to check wall type, cable routes and power outlets before installation.

The manufacturer provides a 3-year warranty that includes the backlight, with an optional extension covering the fourth and fifth years. Request a quote from SmartRooms Qatar to confirm quantities, accessories and the installation plan for your room.

Highlights

55-inch 4K UHD (3840 x 2160) VA panel
500 cd/m² brightness with anti-glare coating
Infrared touch with up to 20 touch points
Android 14 built in with 4GB RAM and 32GB storage
Wireless EShare sharing without apps or dongles
USB-C input carrying video, data and up to 65 W

Classroom fit

At 55″ the farthest student should sit within about 4.1 m (6× the screen height).

Estimated timeline

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

Specifications

86 specifications · Source: manufacturer · checked Oct 2026

Display11

Panel Technology: VA with Direct LED backlights
Screen Size [inch/cm]: 55 / 138.8
Aspect Ratio: 16:9
Brightness (without glass) [cd/m²]: 500
Contrast Ratio (typ.): 5000:1
Viewing Angle [°]: 178 horizontal / 178 vertical (typ. at contrast ratio 10:1)
Colour Depth [bn]: 1.07 (8bit + FRC)
Response Time (typ.) [ms]: 8 (grey-to-grey)
Panel Refresh Rate [Hz]: 60
Haze Level [%]: Pro (25)
Supported Orientation: 45° Tilted Backwards; Landscape; Portrait

Touch8

Touch Technology: Infrared
Number of Touches: Real multi-touch up to 20 touches
Touch Method: Finger; Gloves; Stylus dual pen tip (2.6mm/6.8mm)
Supported Operating System: Android; Linux; Mac OS (single touch); Raspberry Pi; Windows
Data Interface: USB 2.0 (full speed) HID; USB powered, plug & play
Accuracy [mm]: +/- 1
Windows Ink: Yes
Palm Rejection: No

Protective Glass4

Type: Thermal-tempered, anti-glare coating; Zero Bonding
Bonding Gap [mm]: 0.85
Thickness [mm]: 3.1
Hardness [H]: 9

Resolution2

Native Resolution: 3840 x 2160
Supported Resolutions: 1024 x 768;; 1280 x 1024;; 1280 x 720;; 1280 x 960;; 1440 x 900;; 1680 x 1050;; 1920 x 1080;; 3840 x 2160;; 4096 x 2160;; 640 x 480;; 720 x 400;; 800 x 600

Synchronisation Rate2

Horizontal Frequency [kHz]: 31.5 - 135
Vertical Frequency [Hz]: 24 - 70

Connectivity16

HDMI IN 1: Video Input; UHD (60 Hz) HDCP (2.3); Audio Input; CEC
HDMI IN 2: Video Input; UHD (60 Hz) HDCP (2.3); Audio Input; CEC
HDMI IN 3: ARC; Video Input; UHD (60 Hz) HDCP (2.3); Audio Input; CEC
HDMI OUT: Internal SoC content: FHD (60 Hz) HDCP (2.3); UHD (60 Hz); Video Output; Audio Output; Loop Through: HDMI IN 1/2/3, OPS, USB-C, Android SoC
USB-A 1: USB (3.0); Peripherals; USB Storage; Auto Switch (Android SoC, OPS, PC)
USB-A 2: USB (3.0); Peripherals; USB Storage; Auto Switch (Android SoC, OPS, PC)
USB-A 3: USB (3.0); Peripherals; USB Storage; Auto Switch (Android SoC, OPS, PC)
USB-A (Service): Wireless Adapter; USB 2.0; Service
USB-C 1: Touch Signal; Video Input; UHD (60 Hz); DP alt. 1.4; HDCP (2.3); Audio Input; USB 2.0 / 3.0; 65 W
USB-C 2: USB 3.0; 7.5 W; Peripherals; Auto Switch (Android SoC, OPS, PC)
USB-B 1: Touch Signal; USB (3.0)
Audio Output (3.5 mm): Audio Output; Line Out
LAN 1: 100 MBit/s
RS-232C: 9600 bps
Remote In (3.5 mm): Eco Sensor (IR-Extender, Ambient and Presence)
Input Detect: First

Open Modular Intelligence1

OPS Slot: Slot Technology: Open pluggable specification (NEC / Intel OPS standard)

Sensors2

Ambient Light Sensor: optional via Eco Sensor (KTES1)
Human Sensor: optional via Eco Sensor (KTES1)

Electrical4

Power Consumption [W]: 145 (typ.)
Power Savings Mode [W]: < 0.5 (ECO Standby); < 2 (Networked Standby)
Power Management: VESA DPMS
Power Supply: 100-240 V AC; 50/60 Hz

Environmental Conditions4

Operating Temperature [°C]: +5 to +35
Operating Humidity [%]: 20 to 80
Storage Humidity [%]: 10 to 80
Storage Temperature [°C]: -20 to 60

Mechanical7

Dimensions (W x H x D) [mm]: 1,265 x 736 x 73
Weight [kg]: 33
Bezel Width [mm]: 15 (symmetrical)
VESA Mounting [mm]: 400 x 400 (FDMI); M6
Packaging Dimensions (W x H x D) [mm]: 1,410 x 885 x 185
Packaging Weight [kg]: 43
Material: Aluminum alloy (front side); metal (back side)

Embedded Computing7

System Version: Android 14
CPU: Arm Cortex A53x4 2 GHz (octo-core); Arm Cortex A73x4 2.3 GHz
System Memory: 4G RAM
Internal Storage: 32GB ROM
Android Features: App side loading (Google CTS compliant); Application lock; Hide Android SoC; Hide side bar; Portrait support (apps and OSD)
Built-in Applications: File Manager; Input Select; Office and PDF Viewer - MobiOffice; Setting; Web Browser; Whiteboard; Wireless Screen Sharing - E-Share
Built-in Tools: Annotation overlay mode

Bluetooth1

Bluetooth: 5.3 compliant: A2DP; AVRCP; GATT; HID

Wireless Lan1

WLAN: IEEE802.11 a/b/g/n/ac/ax compliant; WPA/WPA2/WPA3 Enterprise, Access Point

Available Options2

Accessories: Eco Sensor (KTES1); Feet (ST-43M); Soundbar (PN-ZCMS1); Trolley (PD04 Tipster; EVER 350 Mobile Motor); USB-C cable (USB-C 5M; USB-C 7M); Wall mount (PDW S 32-65 L & P)
OPS Slot: Recommended: OPS Enterprise Pro, OPS Enterprise Ultra

Regulatory2

Safety and Ergonomics: CE; EMC Class B; RoHS; UKCA
Pixel Failure Class: ISO 9241-307, Class 1

Green Features2

Energy Efficiency: ECOMode; LED Backlight
Ecological Standards: EnergyStar 8.0

3Rd Party Certifications2

Barco ClickShare: Tested compatible for Barco ClickShare (Conference)
Q-Sys: Q-Sys Plug-in

Additional Features8

Special Characteristics: CEC Support; HDMI ARC; NaViSet Administrator 2 - free download; OSD rotation for portrait mode; Powered USB Port (65 W); Scheduler
Audio: Integrated Speakers (2 x 10 W)
Shipping Content: 1x 300 cm USB Cable; 2 x Passive Stylus; 2x AAA batteries; Blank Sticker; Bracket for Camera; Cable Clamps; Display; Power Cable; Remote Control; Setup Manual; Wireless Adapter
Warranty: 3 years warranty incl. backlight; optional 4. + 5. year warranty extension 1
Operating Hours: 18/7
External Control: HDMI CEC; Scheduled Timer
Remote Management: NaViSet Administrator 2
Security: Disable HW Buttons; Disable IR Functionality; Disable USB and LAN Ports; IEEE802.1X (LAN & Wi-Fi)

Downloads

19 files from the manufacturer

Questions about PN-LM551

Who is the Sharp PN-LM551 designed for?

The PN-LM551 is designed for small meeting rooms, huddle spaces, classrooms and interactive signage. Its 55-inch screen suits a few people gathered around a table or a small group working at the board, rather than a large auditorium. Doha offices and schools use it when they want one display that handles writing, file sharing and browsing without a separate computer.

Does the PN-LM551 need a computer to run?

No. It has a built-in system-on-chip running Android 14, with 4GB RAM and 32GB internal storage, so the whiteboard, annotation overlay mode, MobiOffice for Office and PDF files, and the web browser all work without a PC. A laptop can still be connected through USB-C or HDMI when a presenter wants to show desktop applications.

How does the touch function work and how many points does it support?

It uses infrared touch with up to 20 touch points and an accuracy of +/- 1 mm. It responds to fingers, gloves and a stylus, and the stylus supports dual tips of 2.6 mm and 6.8 mm. Windows Ink is supported. The specification sheet does not list palm rejection, so teams that rest a hand while writing should raise this before ordering.

Will the screen stay readable in a bright room with large windows?

The panel is rated at 500 cd/m² brightness and has an anti-glare coating to reduce reflections. The VA panel is listed with a typical contrast ratio of 5000:1 and viewing angles of 178 degrees horizontally and vertically. In rooms facing west, place the screen away from direct sunlight and check sight lines from the back of the room before fixing its position.

Can it be installed in a hot area, a covered outdoor space or a sun-facing lobby?

Not without climate control. The operating temperature range is +5 to +35 °C with operating humidity of 20 to 80%, while outdoor summer temperatures in Qatar can exceed 45 °C. Install the display in an air-conditioned room, not in an open-air area or a sun-facing lobby. Confirm the room conditions with the SmartRooms Qatar team during your site survey.

How do staff share content from their own phones or laptops?

The built-in EShare app lets people share wirelessly from personal devices without installing apps on those devices or using a dongle. Laptops can also connect with a single USB-C cable that carries video, touch signal and data, and can supply up to 65 W of power to the laptop. The package includes a wireless adapter for the display.

Is it compatible with Barco ClickShare or Q-Sys systems?

The data lists the display as tested compatible with Barco ClickShare (Conference) and as having a Q-Sys plug-in. It also supports HDMI CEC and offers an RS-232C port at 9600 bps for control. If you are planning a boardroom with a conference system, confirm the exact software and firmware versions with the SmartRooms Qatar team during the quotation stage.

Will the power supply work with Qatar's electricity supply?

The power supply is rated 100-240 V AC at 50/60 Hz, and Qatar's 240 V mains supply falls within this range. Typical consumption is 145 W, and power savings mode draws less than 0.5 W in ECO standby. Check the electrical outlet position at the site survey so the power cable reaches the mounting point without extensions.

What should we plan before wall-mounting one in a Lusail office?

Plan for the weight and the mounting pattern. The panel weighs 33 kg and measures 1,265 x 736 x 73 mm. It uses a 400 x 400 mm VESA pattern with M6 fixings, and a wall mount from Sharp's PDW S 32-65 range is available as an option. Request a free site survey to check the wall structure, cable routes and socket positions before installation.

Can a school order several units under one purchase order?

Yes. SmartRooms Qatar accepts LPOs and purchase orders, as well as government tenders including Monaqasat, and payment can be made by bank transfer, cheque or purchase order. Quotations are usually provided within one working day. Send the room list, mounting type and accessory needs with your request so the quotation covers every unit.

What warranty applies?

Sharp provides a 3-year warranty that includes the backlight, with an optional extension covering the fourth and fifth years. Products are covered by the manufacturer's warranty. Ask for the extension in your quotation if you plan to run the display heavily in a public or high-traffic area.

How can IT lock down the display for a public lobby or waiting area?

Several settings suit public use. You can disable hardware buttons, the infrared function, USB and LAN ports, hide the Android system and side bar, and lock applications. A scheduler sets on and off times, and the free NaViSet Administrator 2 software supports remote management. IEEE802.1X is available for LAN and Wi-Fi, which helps a clinic waiting area in Doha or a government service centre meet network access rules.