Weatherproof Vehicle Displays

We design and deliver electronic advertising and info solutions that can be placed in vehicles. Our special skills covers difficult conditions such as heat, frost, humidity, dust, vibration, bright light and shocks. The background system and screens communicate wirelessly or over broadband. We can build multi-screen solutions and integrate additional devices, such as switches, GPS sensors, motion detectors, machine vision cameras, etc.

Example of our communication and passenger information systems:

  • i.MX8 QuadMax CPU with QT application platform
  • Widescreen 28”, 36” or 48”, 16:3 HD resolution LCD
  • Optional eSIM LTE modem, WiFi and GNSS
  • Dual Daisy-Chain Switched Ethernet with bypass relays
  • Ethernet over PowerLine
  • 8-36VDC or 110VDC power supply

We produce ready-to-use solutions for immediate presentation of content and interactive communication.

DG-PID21-R 21.5”

DG-PID21-R is a rugged purpose-built stand-alone IP connected Intelligent Passenger Information Display for bus applications which require high service reliability and easy integration with other in-vehicle systems. The PID21-R bases on a low power i.MX8 CPU which can include Duragon’s proprietary firmware or third party PID-system Client Software. The intelligent display can deliver media content combining video, animations with static or changing images on the HD resolution display. Route and operational service information can be combined with advertising content. Ethernet is used for integration with other onboard systems. Display content is not streamed over Ethernet, only control information is sent over the network. Media is stored in the PID21-R and it can be updated over the Ethernet backbone. The internal Ethernet switch with its two external ports, enables the connection of multiple PID21-R displays in series. In case there is a HW or other internal failure, the bypass relays will automatically disengage a faulty device from the Ethernet network.

Functionality is optimized in the PID21-R intelligent display. A high brightness and contrast LCD display supports full HD resolution. The internal single control board includes a i.MX8 CPU, supervised by a microcontroller which manages all the display’s functionality including safe power on-off, secure booting, backlight brightness, temperature monitoring and event logging. The integrated widerange railway grade power supply can reliably directly connect to a 24VDC nominal power supply.

Our design approach reduces lifecycle costs and migration challenges. The technology of the PID21-R is based on commercial standards, Industrial-Grade components and a design leveraging 20+ years of paradigm experience in vehicle systems design.


Purpose built – The DG-PID21-R Passenger Information Display’s architecture, functionality, enclosure, connectors and structure are designed for high availability and 24/7 operating Ethernet connected bus or tram applications. The DG-PID21-R display integrates a proprietary Freescale i.MX8 graphics control computer, vehicle PSU, management microcontroller and Dual-Port Ethernet switch with Bypass Relays.

Resistant – DG-PID21-R is designed to withstand the mechanical, electrical and environmental stress encountered in bus installations in arctic and tropical conditions.

Wide temperature range – A wide operating temperature range ensures reliable continuous operation from -25~ +55°C. The system is completely fanless and features conduction cooling and an internal temperature monitoring and thermal protection system.

Compliance – The DG-PID21-R display is compliant with:

  • EN50155, EN61373 (Shock and vibration)
  • IP52 according to IEC 60529

Connectivity – Comprehensive set of connectivity interfaces

  • Dual 10/100 MBit Ethernet Ports with safety bypass relays
  • Power management CAN-bus
  • Service USB and Ethernet port under service panel

Functionality – The PID21-R is fully autonomous in its operation. This device can perform signage, interfacing over Ethernet with other systems on the bus. The dual Ethernet ports support “Daisy-chain” operation, reducing cabling and In-Vehicle Ethernet switch ports. Media content is stored locally and can be updated over the Ethernet interface from an onboard Single Control Unit or Telematics Server.

The system bases on open Linux OS and high level rapid graphical development tools are available. The internal uC ensures safe start-up with system health monitoring as well as thermal throttling of the CPU and the backlight.

General features:

  • 21.5” HD LCD display
  • LED backlight with SW control
  • Brightness 500 nits, contrast 1000:1
  • Dual 10/100Mbit switched Ethernet ports
  • Safety Bypass relays on Ethernet ports
  • Low power i.MX8 Linux Display Controller
  • Autonomous operation, local media storage
  • 8-36VDC 12/24VDC Vehicle power supply
  • Fanless, conduction cooled, -25..+55°C op.
  • Diagnostics and system management uC


The DG-EL1696-P5B is a rugged LED passenger information display targeting bus installations. This display is purpose-built with protected and EMC filtered RS-485 and CAN 2.0 interfaces and an automotive grade power supply, which can directly connect to the vehicle’s 24VDC battery system. The electronics of the display is full SMD to increase mechanical reliability. The display is based on a 32-bit CORTEX-M3 microcontroller with dedicated firmware, which can be customized to meet the specific requirement of each project, including custom graphics elements and language support. Error and diagnostic codes are available to monitor the health of the display and its correct operation. Constant current LED sink drivers are used to drive high brightness SMD LED components to increase the optical performance and ruggedness of the display. The LED matrix brightness can be adjusted from 0 to 100% under software control or automatically adjusting to daylight conditions. The brightness of the LEDs is thermally throttled to protect components at high ambient temperatures. The display base is black for improving contrast. The LED area is covered by a tamper proof safety glass. The LED display is based on boards which include 16 x 32 LEDs, the master board connects to the slave boards with board-to-board connectors. This modular approach enables the adaptation to different LED matrix sizes. Each board has its own local tightly regulated power supply for improved power distribution. The RS-485 interface or CAN 2.0 interface can be used for host communication using a HEX-format based protocol for commands and controls. The host can interrogate display status including supply voltage, internal temperature, ambient light level as well as the diagnostic status of individual LEDs is the complete matrix. A LED diagnostic check is performed when power is applied to the display.

Our design approach reduces lifecycle costs and migration challenges. The technology of the DG-EL1696-P5B is based on commercial standards using Industrial-Grade components and design principles leveraging 20+ years of systems design paradigm experience in bus and automotive installations.


Purpose built – The architecture, functionality, enclosure, connectors and structure of this display unit is designed for 24/7 operation in bus transportation applications.

Resistant – The Display Unit is designed to withstand the mechanical, electrical and environmental stress encountered in bus installations in arctic and tropical conditions.

Wide temperature range – A wide operating temperature range ensures reliable continuous operation from -25~ +70°C.

Mechanical design – The display frame is based on an extruded aluminum profile with a scratch resistant safety glass display cover. The enclosure is sealed up to IP52 on all sides. Strengthened M5 mounting holes are located on both sides for easy installation. A black base color enhances LED contrast.

Compliance – The Display Unit is designed for compliance with:

  • EN50155 and EN50121 mandatory parts
  • EN61373 shock and vibrations

Interface – The DG-EL1696-P5B interfaces with onboard passenger information system controller using either RS-485 serial interface or CAN 2.0. The display can receive message commands and display bitmap, ASCII or custom characters on the 16 x 96 dot LED matrix.

Firmware and Protocol – The internal CORTEX-M3 controller receives commands using an ASCII hexadecimal format. The firmware can support static and scrolling messages in most languages. Special images can be displayed in bitmap mode, where every LED can be controlled independently to show graphics symbols. The brightness of the LED matrix can automatically adjust to ambient lighting conditions or controlled by host systems using commands. The LED display can return error codes as well as status information to the system host.

General features:

  • LED display with 16 x 96 resolution
  • Matrix density P5 (5mm pitch)
  • Color 590nm AMBER
  • LED typical brightness 1000mcd
  • Wide viewing angle and clear readability
  • Uniform optical performance for matrix
  • Internal LED and system diagnostics
  • RS-485 and CAN 2.0 Interface
  • Vandal proof safety glass
  • 24VDC nominal power input
  • Rugged aluminum enclosure
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