Sorry guys, I trawled through a bunch of umbrella ideas (gee, there's a lot, too) and couldn't find anything like this anywhere. So here goes.
For this you'd need to make the inner lining of the umbrella out of something similar to projection screens - to adequately hold the image. Then, somewhere down near the handle there would be mounted a projector, processor, battery, etc.
The projector would be set up to project onto the curved surface (with intensity tapering off towards the edges for even lighting, etc), and I suspect the umbrella frame would have to be rather unobtrusive, or even external. Perhaps the inner lining would be somewhat elastic to allow for a smooth curved surface.
The baseline model would simply project a static scene of an idyllic blue sky, with perhaps a few intriguing clouds dotted about. Perhaps an integrated speaker could project some appropriate ambient sounds, like birdsong, or water running down a stream. More advanced models could project moving scenes, orient the scene dependant on the movement of the umbrella using tilt switches/gyroscopes, etc. Obviously you could have a library of scenes including a rainforest canopy, beautiful sunsets, clear starry nights (including a big bright romantic moon), or even something prosaic, like say the Sistine Chapel.
Next time you're stuck out in the rain, walking to the train station, with a dreary grey cityscape all around, you could turn on your SunBrella and be surrounded by a bright, sunny sky, birds chirping away over the murmur of a trickling brook. mmmm. Just the ticket.-- Custardguts, Jan 03 2008 Credit to the idea that made me post this. Laser_20BrollySimilar, but, well, different. [Custardguts, Jan 03 2008] picture umbrellas are plentiful http://www.umbrella...ategory_Code=NATURE [dentworth, Jan 03 2008] I'm sorry to be a downer on such a lovely day, but there is just too much to carry here. I'll get a pretty print umbrella.-- dentworth, Jan 03 2008 Each to their own, but the idea here was that mine would be bright, give moving scenes, have sounds, etc. I can't see the projector unit weighing more than a kilo at most.-- Custardguts, Jan 03 2008 yours is different; I just pictured a "laser light show"... mind you mine only weighs a few ounces and IT HAS FRICKEN LASERS :D-- FlyingToaster, Jan 04 2008 //HAS LASERS// gr. "HAS FRICKEN LASERS"-- Custardguts, Jan 04 2008 Just don't look into the bright red dot.
Place a bunch of them together in a dome, network the displays, and you have a portable planetarium.-- RayfordSteele, Jan 04 2008 random, halfbakery