Reliability is really important for any working tool. The HDR47 is equipped with a very powerful LED array that generates a significant amount of heat. It is well known how LEDs lifetime decreases with temperature. Moreover, the spectral emission distribution of LEDs is a function of the working temperature. Thus, thermal management was a crucial point in the design of HDR47, in order to respect the LED specifications and to guarantee the uniformity of brightness and colorimetric values over time.
By the use of thermal simulation tools, our engineers designed HDR47E taking into account two basic goals:
the overall heat quantity should distribute evenly across the whole heat sink mass, allowing to meet homogeneity requirements
heat dissipation must be quick and efficient, taking into account severe working conditions. Excessive temperature peaks may damage LEDs as well as optical components and their geometry
Of course the project takes into account dimensions and weight for displays also meant to be used as demo platforms.
The whole monitor active area is covered by custom made big aluminium heat sinks.
Thermal couplings materials, disposition and careful assembly guarantee both a quick transfer of the energy from the sources to the dissipation area and between adjacent areas.
Low rpm high efficiency fans force a considerable air flow which travel against temperature gradient. This configuration allows to increase heat dissipation while helping its distribution.
Extensive simulation and physical prototyping have led to the definition of a system performing on the same level as a liquid cooling plant without the typical extra weight and reliability issues.