Reliable outdoor performance starts with controlling heat
Outdoor LCD signage is more than a screen inside a weatherproof enclosure. It is a complex electronic system exposed to changing and often extreme thermal conditions.
Reliable performance depends on managing three combined heat sources:
Direct solar radiation
Ambient air temperature
Heat generated by the high-brightness LCD, backlight and electronics
Together, these loads can raise temperatures inside the enclosure significantly above the surrounding air temperature. Even in locations with moderate ambient conditions, direct sunlight can create high surface temperatures and local heat spots across the LCD.
When thermal load is not controlled, the first signs are usually reduced luminance, black spots on the LCD surface, accelerated component degradation and unexpected system shutdowns.
The right cooling principle
Effective cooling is not simply achieved by installing more fans or increasing fan speed.
Cooling performance depends on how air moves through the enclosure, where heat is removed and how the system responds when outdoor conditions change. Fan positioning, airflow resistance, channel geometry and turbulence all influence thermal and acoustic performance.
Three principles define the right thermal solution:
Controlled airflow
Cooling air must reach the thermally critical areas of the display. Uniform airflow across the LCD helps reduce local heat spots and maintain a more stable surface temperature.
Cooling based on actual demand
Thermal load changes throughout the day. Cooling capacity should increase during direct solar exposure and high ambient temperatures, then reduce when conditions return to normal.
The correct architecture for the environment
Direct-air cooling provides an efficient and cost-effective solution where ambient conditions allow it. Compressor-based air conditioning provides greater temperature control for more demanding environments.
Cooling Technologies in Practice
DSC™ — Dual-Stage Cooling
imotion DOOH introduces DSC™ — Dual-Stage Cooling, developed to deliver the required cooling capacity while minimizing unnecessary fan operation, noise and energy consumption. During normal conditions, the primary cooling stage creates evenly distributed airflow across the front surface of the LCD. Heat is removed where solar radiation and LCD operation create the greatest thermal load, helping prevent local heat spots and uneven surface temperatures.
When direct sunlight and high ambient temperatures increase the thermal load, the secondary cooling stage activates automatically. Its fan speed continuously adapts to the actual cooling demand. Once conditions normalize, the system returns to primary cooling.
Best suited for: DOOH networks requiring reliable cooling, controlled noise, lower operating costs and adaptive performance.
Learn more about Dual Stage Cooling and its benefits
HVAC cooling
imotion G7 uses air condition with a closed airflow loop. Unlike direct-air cooling, the system actively controls the enclosure temperature instead of relying only on the surrounding air. This provides stable internal conditions for the LCD and electronics and supports consistent visual performance in demanding outdoor environments.The controlled enclosure temperature also reduces long-term thermal stress on integrated components and can extend the expected lifetime of the LCD. Compressor-based cooling requires a higher initial investment, but it provides the highest level of thermal control within the imotion® product range.
Best suited for: demanding climates and projects where stable enclosure temperature is the primary requirement.
Double-loop direct-air cooling
imotion FLOW uses regulated direct-air cooling. Fans move cooling air through the signage enclosure and adjust their speed according to the measured enclosure temperature. Cooling capacity therefore responds to actual operating conditions instead of remaining fixed. This approach provides an efficient and cost-effective thermal solution with lower system complexity than compressor-based air conditioning.
Best suited for: installations where direct-air cooling provides sufficient capacity and operating efficiency is the main priority.
Verified in the Solar Radiation Simulator
All imotion systems are verified in SRS - Solar Radiation Simulator, where we can reproduce direct solar exposure, high ambient temperatures and internally generated heat under controlled and repeatable conditions.
Inside the SRS™, complete imotion® digital signage systems are tested under combined thermal loads, including simulated solar radiation, ambient temperatures of up to 55 °C and maximum internal heat generation.
The validation process examines:
Cooling-system capacity and activation logic
Airflow distribution and local heat spots
Luminance stability under thermal load
Protective temperature thresholds
Noise levels and component stability
Complete system operation under extreme conditions
