Digital Picture frame with Power Saving Features

Solo-Malee writes: I have been searching for a Digital picture frame that offers a 'proximity' or 'movement' based power saving mode. (Size is a secondary criteria after that functionality but consider 7" — 9" my target). Many of those that I see advertised offer a 'timer based' operating window. None seem to offer a mode that is based on:

"Don't display pictures if there has been no one in the room within the last [15|30|60|90] minutes".

Any Slashdoters out there know of a manufacturer that offers what I am looking for?

If you don't, then feel free to patent the idea, make the product, credit me as you feel fit and sell it to me for a reasonable price ;-)