When space is limited but performance can’t be compromised, innovation is the only way forward. This case study explores how Comsight engineered an ultra-thin vehicle-mounted VMS board that meets demanding urban mobility requirements, without sacrificing functionality or durability. The same design principles have also been applied to create VMS for TMA Trucks and TMA Crash Trucks, demonstrating the versatility of our solutions for a wide range of transportation needs.
1. Project Context
“Ultra-Thin Vehicle Mounted VMS Board for Urban Mobility”
As a leading LED display manufacturer, Comsight partnered with a transportation client to develop a custom vehicle mounted VMS board. The display required a compact 480mm (H) × 1920mm (W) viewing area to deliver real-time messaging in urban mobility applications. The challenge was severe: the entire vehicle-mounted digital signage system—including LED modules, control boards, and enclosure—had to remain under 68mm in depth, with maximum dimensions of 2200mm (W) × 550mm (H). Our design approach was also tailored for TMA Trucks and TMA Crash Trucks, where space is at a premium but durability and functionality are critical. These vehicles are used for traffic management and crash response, which requires a system that can withstand harsh environments while providing real-time communication.
2. Technical Challenges
Vehicle integration presented three key challenges:- Space optimization: Maintaining full functionality—including control systems, power units, and cooling—within a 68mm profile.
- Thermal management: Ensuring reliable operation in a compact, vibration-prone enclosure, which is crucial for systems used in demanding environments such as crashed trucks and TMA trucks.
- Structural integrity: Designing a slim yet robust housing that can withstand real-world conditions, particularly for TMA Trucks deployed in urban environments or crashed trucks responding to accidents.
3. How We Did It
Our engineers tackled the challenges using three innovations:A.Lateral Component Relocation
- We extended the total width to 2180mm to create 130mm bays on each side.
- Critical components—control boards, DC-DC converters, and wiring—were moved from behind the LED modules to these bays. This redesign reduced overall depth by 32% compared to conventional vehicle-mounted digital signage layouts.
B. Fixed-Panel Slim Enclosure
- Replaced bulky access doors with a screw-secured rear cover, eliminating hinge mechanisms and overlapping seals.
- Achieved a total thickness of 60mm – including modules and enclosure – through milled aluminum framing and flush-mounted components.
C. Aerodynamic Thermal Design
- Since the back panel faces the wind during vehicle motion, we designed intake vents on the right and exhaust vents on the left of the front panel.
- This layout prevents rainwater ingress while allowing passive cooling at high speeds, crucial for vehicle-mounted VMS board performance in long-duty cycles.
Finished VMS:
4. Outcome & Performance Validation
The project delivered a market-leading VMS solution that exceeded spatial constraints while ensuring reliability:- 60mm total thickness – beating the 68mm target.
- Zero thermal derating during 48h continuous operation tests (ambient: 45°C).
- IP65-rated protection for front display area/rear (IP54 for intake and exhaust vents).
- 30% faster installation due to unified, lightweight design (<22kg).
“This project redefines slim-profile VMS standards. By rethinking component placement and airflow, we achieved what clients deemed impossible in vehicular displays.” — Comsight Engineering Team
The first production batch of these vehicle-mounted digital signage systems has been successfully delivered and deployed. Our client praised its reliability, ease of installation, and thermal performance in demanding urban environments.
Your Idea, Our Solution.
— Buy Comsight LED VMS Boards Today.
