LED display shining through the wood

[mickeymoose]

Well, that takes me back (no, I am not that old!). Was the Nurenberg Egg not made of wood? E

[wrenchone]

Stalker - a white LED is just a blue LED with yellow conversion phosphor. What red exisits in its emission spectrum will be at the fringes of the yellow phosphor's emission profile. The wood is absorbing/scattering the shorter wavelengths (blue, yellow) and just letting that small amount of red fringe emission through. A red LED cannot give you blue or purple light because those colors don't exist in its emission spectrum. With the wood, you should just get brighter (relative to the white LED) red.

[Cassiel]

You're absolutely right, now I see the mistake in my reasoning.

"The wood is absorbing/scattering the shorter wavelengths (blue, yellow) and just letting that small amount of red fringe emission through"

Interesting...I thought the red was because of the red wood. :-) And yes it was a dull red and now I know the reason. Thanks for the explanation.

EBM_dude : Yes, it is.