LG 55PK640S0UB 55-Inch 4K UHD Commercial Signage TV

LG 55PK640S0UB 55-Inch 4K UHD Commercial Signage TV

The LG 55PK640S0UB 55-inch 4K UHD commercial signage TV is a webOS 25 display built for retail, corporate, hospitality, and professional presentation environments. It combines 3840 x 2160 resolution, 300-nit typical brightness, a 16/7 operating profile, built-in speakers, network connectivity, and onboard content-management tools in a slim commercial display.

Designed for businesses that need a 55-inch digital signage display without a separate media player for basic content, the PK640S supports embedded Content Manager and Group Manager functions. Users can create playlists, schedule content, mirror compatible devices, use the display as a wireless access point, and integrate optional LG SuperSign CMS for larger signage deployments.

Professional integration features include HDMI, USB, optical audio, RS-232C, RJ45 LAN, RF input, external speaker output, Crestron compatibility, SNMP, and signage failover functions. HDR10 Pro and HLG support expand compatible video playback, while UL certification, FCC Class B compliance, a 200 x 300 mm-class VESA mounting pattern, and a three-year limited warranty support commercial installation requirements.

Key Features

• 4K UHD Commercial Display: Delivers 3840 x 2160 resolution on a 55-inch direct-backlit panel for detailed signage and presentation content.
• webOS 25 Platform: Runs LG's commercial smart platform with integrated content, scheduling, browser, and network functions.
• Embedded Content Management: Content Manager and Group Manager provide playlist creation, scheduling, and display control without requiring a separate PC for basic workflows.
• 300-Nit Typical Brightness: Supports indoor commercial signage in retail, meeting, hospitality, and corporate environments.
• 16/7 Operating Profile: Designed for operation up to 16 hours per day, seven days per week.
• Professional Connectivity: Includes HDMI, USB, LAN, RS-232C, RF, optical audio, and external speaker connections for AV system integration.
• Network and Wireless Features: Supports built-in Wi-Fi, Miracast screen sharing, Smart Share, Bluetooth audio playback, Soft AP, and IP streaming.
• LG Signage Ecosystem: Supports SuperSign software, LG ConnectedCare, Crestron compatibility, Beacon functions, scheduling, failover, and remote management features.

Technical Specifications

Display

• Model: 55PK640S0UB
• Screen Size: 55 inches
• Panel Tool Name: BOE UA73
• Stand Type: 2-Pole
• Front Color: Black
• Native Resolution: 3840 x 2160 UHD
• Backlight Type: Direct
• Brightness: 300 nits typical / 260 nits minimum
• Static Contrast Ratio: 1200:1
• Dynamic Contrast Ratio: 1,000,000:1
• Response Time: 8 ms G-to-G
• Refresh Rate: 60 Hz
• Operating Profile: 16 hours per day / 7 days per week
• Backlight Lifetime: Up to 30,000 hours

Video and Processing

• System-on-Chip: K25Lp Quad
• Operating System: webOS 25
• HDR: HDR10 Pro and HLG
• Vertical Orientation: Supported
• Failover: Supported
• Play via URL: Supported
• Display Power Management: Supported
• Time Scheduler: Supported
• NTP Sync Timer: Supported

Audio

• Built-In Speaker Output: 10W + 10W
• Speaker System: 2.0-channel
• LG Sound Sync: Bluetooth or optical
• External Speaker Output: 3.5 mm
• Digital Audio Output: Optical

Broadcast and Smart Functions

• Digital Broadcast: ATSC and Clear QAM
• Analog Broadcast: NTSC
• Teletext: Auto Teletext
• IPTV: Global IP streaming support
• Smart Home: Launcher Bar
• Quick Access: Supported
• Web Browser: Supported
• Preloaded App: YouTube
• SDP Server Compatibility: Supported
• Software Clock: World Clock and Alarm
• Mood Display: Supported
• Soft AP: Supported
• Wireless Networking: Built-in Wi-Fi
• Screen Sharing: Miracast
• Smart Share: Supported
• DIAL: Supported
• Bluetooth Audio Playback: Supported
• Mobile Connection Overlay: Supported
• HDMI ARC: Supported on HDMI 2

Commercial Signage and Management Features

• USB Cloning: Supported
• SNMP: Supported
• Self Diagnostics: USB diagnostics supported
• SI Compatible Protocol: TV Link Tuner
• HTNG-CEC: Supported
• HDMI-CEC: Simplink 1.4
• IR Output: RS-232C phone-jack type
• Multi IR Code: Supported
• Hotel Mode / PDM / Installer Menu: Supported
• Lock Mode: Limited
• Port Block: Supported
• Welcome Screen: Splash image supported
• Insert Image: Supported
• IP Channel Manager: Supported
• Moving Picture Playback: SD, HD, and Plus HD
• Auto Off / Sleep Timer: Supported
• Energy Saving Mode: Supported
• Motion Eye Care: Supported
• Beacon: Supported
• Embedded Content Manager: Supported
• Embedded Group Manager: Supported
• Crestron Compatibility: Certified compatibility

LG Software Compatibility

• SuperSign Control: Supported
• SuperSign Control+: Supported
• SuperSign CMS: Supported
• SuperSign CMS Premium: Supported
• Simple Editor: Supported
• LG ConnectedCare: Compatible; service availability and subscription requirements vary

Connectivity

• HDMI: HDMI 2.0 inputs with HDMI 2 supporting ARC/eARC
• USB: USB 2.0 Type-A
• RF Input: Antenna / cable input
• RS-232C: 3.5 mm phone-jack control connections
• LAN: RJ45 Ethernet
• Digital Audio Output: Optical
• External Speaker Output: 3.5 mm

Mechanical

• VESA Mounting Pattern: 7.9 x 11.8 inches
• Dimensions Without Stand: 48.3 x 27.9 x 2.4 inches
• Dimensions With Stand: 48.3 x 30.2 x 10.8 inches
• Shipping Dimensions: 54.3 x 32.7 x 4.6 inches
• Weight Without Stand: 22.5 lb
• Weight With Stand: 22.9 lb
• Shipping Weight: 30.2 lb
• Bezel Width, On: Top 0.3 inches, right 0.3 inches, left 0.3 inches, bottom 0.7 inches
• Bezel Width, Off: Top 0.3 inches, right 0.3 inches, left 0.3 inches, bottom 0.1 inches

Power and Compliance

• Power Supply: 100 to 240V AC, 50/60 Hz
• Maximum Power Consumption: 136W
• Typical Power Consumption: 113W
• Standby Power Consumption: Less than 0.5W
• Safety Certification: UL
• EMC Compliance: FCC Class B
• Warranty: 3-year limited warranty
• Assembly Country: Mexico
• UPC: 195174132852

What's In the Box

• LG L-Con Remote Control, AKB75095376
• 59.1-inch Power Cable
• RS-232C to Phone Jack Cable