The Solar Radiation Simulator reproduces direct solar exposure, high ambient temperatures and internal heat generation to validate complete imotion® outdoor digital signage systems under controlled, combined thermal loads.
The greatest thermal challenge for outdoor digital signage is not ambient temperature alone. Direct solar radiation and heat generated by the integrated components can drive temperatures inside the enclosure significantly above the surrounding air temperature.
Outdoor LCD systems must therefore withstand three combined thermal loads:
Solar radiation
Internal heat generation
Ambient air temperature
Together, these loads determine whether an outdoor display can maintain stable brightness, protect its components and operate reliably over time.
When temperatures rise above optimal thresholds, the liquid crystal layer deteriorates, rendering the display defective.
First signs of defective displays are:
Reduced image quality due to luminance loss
Black spots on the LCD surface from overheating
Accelerated component degradation
Unexpected system shutdowns or failures
As outdoor temperature extremes become more frequent, reliable thermal performance is no longer optional
The Solar Radiation Simulator combines simulated solar radiation, ambient temperatures of up to 55 °C and heat generated inside the enclosure.
This enables us to reproduce combined thermal loads beyond those expected at the intended installation location and evaluate how imotion® digital signage system responds under extreme conditions.
Cooling-system capacity and activation logic
Airflow distribution and localised heat spots
Luminance stability under thermal load
Protective temperature thresholds
Component and system stability
Define
Operating conditions are defined by microlocation, screen orientation, desired power consumption and acceptable noise level.
Simulate
Clogged filter, solar radiation and ambient temperature conditions beyond the specified operating environment are simulated inside the SRS.
Validate
Under extreme conditions, thermal management logic, airflow performance, protection thresholds and noise levels are tested, calibrated and validated.
Deploy
The imotion outdoor digital sign receives SRS certification for reliable operation in its real-world environment.
Two outdoor displays can use the same LCD panel and still deliver significantly different results. The difference is often found in how effectively each system controls the temperature inside the enclosure.
The graph shows how LCD backlight output changes at different internal operating temperatures. Lower temperatures can temporarily allow higher luminance output, including operation outside the manufacturer’s warranted temperature range. However, high measured brightness alone does not demonstrate safe or reliable long-term operation.
