Technical Basis of Doorzign
Simple, reliable and proven
Doorzign is based on a deliberately lean and reliable technical architecture. All components are designed for low maintenance, long service life and stable operation – ideal for offices, educational institutions and public buildings.
System overview
A Doorzign system consists of three central components:
Doorzign e-paper displays on the door
A gateway for wireless updates
The Doorzign server for central control
This architecture ensures a clear separation of display, transmission and management.
E-paper displays on the door
The Doorzign displays are the visible component of the system located directly on the door.
They use e-paper displays from the manufacturer Qbic, which are specially designed for long-term, low-maintenance use in buildings.
Available display variants
Doorzign supports two display sizes, which can be used depending on the door, room type and information requirements:
Qbic EP 400 – 4,2 Zoll
Compact design for individual offices, nameplates or smaller rooms
Easy to read even from a short distance
Ideal for limited space on the door
Display
Screen size: 4.2-inch e-paper.
Resolution: 400 × 300 pixels.
Colours: black, white and red.
Wide-angle viewing: 178° horizontally and vertically.
Orientation: Landscape or portrait format possible.
Controls
Reset button: 1 ×.
Programmable buttons: 3 × for additional interactions.
LED status indicator: 1 × (multicoloured).
Energy & Connectivity
Wireless transmission: Bluetooth Low Energy 5.0 (BLE). nbsp;
Battery supply: 4 × CR2450 button cells.
Battery life: Up to approx. 3 years (with typical use).
Mechanics & Dimensions
Dimensions: approx. 98 × 85 × 11.2 mm.
Weight: approx. 71.6 g (without accessories).
Mounting: Suitable for glass, walls or other surfaces.
Material: ABS + PC housing.
Environment & Operations
Operating temperature: 0 °C to 40 °C.
Storage:−20 °C to 60 °C.
Humidity range: 0 – 90 % (non-condensing).
Certifications
CE, UKCA, FCC, BSMI, NCC, CB and other relevant approvals.
Qbic EP 700 – 7,5 Zoll
Larger display for meeting rooms, seminar rooms or event rooms
More space for information such as room names, time slots or notes
Excellent legibility even from a distance
Display
Screen size: 7.5-inch e-paper
Resolution: 800 × 480 pixels
Colours:black, white, red
Viewing angle: 178° horizontal and vertical
Orientation: Portrait or landscape format possible
Controls
1 × reset button
3 × programmable buttons
1 × LED status indicator (multicoloured)
Communication & Power Supply
Wireless: Bluetooth Low Energy (BLE) 5.0
Power supply: 6 × CR2450 lithium button cells
Battery life:Up to 3 years with typical usage
Mechanical data
Dimensions: approx. 182 × 122 × 11.6 mm
Weight: approx. 183 g (without accessories) /nbsp;354 g (including packaging & holder)
Material: ABS + PC plastic
Mounting: glass or other surfaces
Environment & Operations
Operating temperature: 0 °C to 40 °C
Storage:−20 °C to 60 °C
Humidity: 0 – 90 % non-condensing
Certifications
CE, UKCA, FCC, BSMI, NCC, CB, ICRoHS 3.0 compliant
Accessories & options
Optional: screws, brackets, tape, desktop stand – depending on mounting requirements
Gateway: Central connection in the system
The gateway is the technical interface between the Doorzign displays and the Doorzign server.
Gateway model
Qbic BXP-100 Gateway.
Connection & Operation
Connection to the internet via LAN or WLAN
Requires a power connection or POE
Fixed location in the building (e.g. technical room, corridor, floor)
Function
The gateway communicates with the Doorzign server using encryption
Content, status information and updates are controlled via this gateway
Transmission to the displays is wireless via Bluetooth
Performance & Operating System
Processor: ARM Quad-Core Cortex-A53, approx. 1.5 GHz
Graphics:Mali series GPU
Memory: 2 GB DDR4 RAM
Internal memory: 32 GB
Operating system: Android
Display & media
Video playback: 4K resolution (3840 × 2160) at 60 fps
Supported codecs: including H.264, H.265, MPEG formats
Connectivity
Ethernet: RJ45 10/100 BASE-T
Wi-Fi: Dual band (2.4 GHz and 5 GHz)
USB: 1 × USB 2.0, 1 × USB 3.0
HDMI: 1 × HDMI output
SD slot: MicroSD up to max. approx. 2 TB (for memory expansion)
System & security features
Watchdog timer: Independent hard reset monitoring
Connectivity protection: SSL/TLS, proxy server, 802.1X authentication
Remote functions:Remote configuration, OTA updates (firmware/APK)
PR features: Kiosk/presentation mode, real-time clock (RTC)
Mechanics & Dimensions
Housing: Compact, fanless (silent operation)
Mounting: VESA mounting possible
Dimensions (approx.):127 × 66 × 18.5 mm
Operating temperature: 0 °C to 60 °C
Storage temperature: −20 °C to 70 °C
Certifications: CE, FCC, RCM
Central administration & server operation
All Doorzign gateways and displays are managed centrally via the Doorzign server.
Functions
Management of all displays and gateways
Distribution of content and updates
Monitoring of:
Battery level
Reception strength
Connection status
Automatic calendar synchronisation (iCal connect)
Doorzign displays are completely battery-powered and do not require a power connection.
Batterietyp: CR2450 Lithium-Knopfzellen
EP 400: 4 × CR2450
EP 700: 6 × CR2450
The typical battery life is up to three years, even with multiple updates per day.
The battery level of each individual display is recorded regularly and shown in the Doorzign web front end. This allows battery replacements to be planned in advance without having to check individual doors manually.
No. The displays themselves do not have a direct internet connection; the gateway requires an internet connection to the Doorzign server.
All communication between the gateway and display takes place:
Wireless via Bluetooth Low Energy (BLE)
Exclusively via a Doorzign gateway
Controlled and monitored by the Doorzign server
This reduces complexity and vulnerabilities.
Wireless installation directly on the door or wall
No power or network cabling required
Fixed installation location after mounting
Very low maintenance thanks to long battery life
The Doorzign gateways transmit content and updates wirelessly via Bluetooth Low Energy (BLE) to the e-paper displays. BLE is particularly energy-efficient and ideal for battery-powered devices.
The typical range is approx. 20–25 metres with a clear line of sight. Walls, doors and structural conditions can affect the range.
In larger or winding buildings, coverage may be affected by:
additional antennas
or the use of multiple gateways
be flexibly expanded.
A gateway can technically control up to 50 displays. For stable and high-performance operation, a maximum of 20 displays per gateway is recommended in practice.
This recommendation ensures that:
Updates are carried out quickly
The radio connection remains stable
Sufficient reserves are available for future expansions