Idea for one of the next Neos: Projecting the display via LEDs

Ulrik Rasmussen openmoko at
Sun Jan 21 19:01:08 CET 2007

On Sunday 21 January 2007 18:46, Wil Chung wrote:
> Dr. H., I agree that it needs a beam scanner, on first though, but does it
> have to be mechanical?  I know you can direct radio waves with something
> like a phase array, might not light be directed with a phase array?  I
> don't know, as it's just a guess since they're both E&M.
I don't think it is possible to "bend light", so you'll probably need some 
sort of mechanical device for it. However, I stumbled on this some times ago, 
which seems to fullfill the needs:

It's basically a red and blue laser diode, aimed at a very tiny vibrating 
mirror. The problem is, as the article says, that they can't use green 
diodes, because these aren't small enough. I don't know the technical details 
for this obstacle though. Red and blue should be enough for text though, at 
least you will be able to render red, purple and blue.

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