FIG. 4 is a top section view of the embodiment shown in FIG. 1, taken along the section line C-C and indicating the location for Detail A. In this figure, the two channels for ambient air 60 behind each of the displays 30 and 31 can be seen. Again, preferably the two paths of ambient air 60 can remove heat from the electronic displays 30 and 31 as well as the electronics 110 (through the thermal walls 126 and 127).

FIG. 5 is a detailed section view of Detail A. Once the ambient air 60 has travelled through each of the open loop channels, it can be gathered by the exit plenum and forced out of the display housing 25 by the fan 100.

FIG. 6 is a partial exploded view of the embodiment shown in FIG. 1. This shows the stacking of the elements for one side of the assembly, i.e. the components surrounding electronic display 31. The ambient air 60 is preferably directed through the entrance apertures 200 so that it may pass between the thermal plate 127 and the rear of the electronic display 31 (in this embodiment, the rear surface of the LED backlight 41). Once passing through the open loop channel, the ambient air 60 is preferably directed out of an exit aperture 201 so that it can be collected in the exit plenum and exhausted out of the display housing. The circulating gas 70 generally encircles the open loop channel(s) having the ambient air 60. In other words, the open loop ambient air 60 passes through the center of the closed loop of circulating gas 70.