Android hospital suite signage

We're working on a pretty interesting project at the moment designing digital displays for a fairly large hospital to replace some existing way-finding signage.

We're looking at some different ways to mitigate screen burn on some of the more static displays like this one. Has anyone seen good examples of constant digital displays that don't change very often? Airports always seem to have terrible examples and their content changes quite a lot.

The ones we're building (displayed here) change dynamically depending on which doctor is in the room at anyone time and it all runs on Android.

You can read a bit more about the project here http://www.nazori.com

Would be good to get people's feedback or if they've seen some other good examples.