White displays?

Blue LED certainly exists (I reviewed Lite-On LTS-5501AB here in this newsgroup several years ago) but I've yet to see white, even though the semiconductor technology should be similar.

Numitrons have nearly-white segments, especially at 7V, but the filaments tend to burn out quick if you run them there :-).

I've also seen 7-segment displays built with 4-foot flourescent tubes!

Tim.

Just a thought:

The normal white LED is really a blue one pumping a phosphor. If this same phosphor was made part of plastic sheet over the face of the display you may get a white display.

I'm thinking of paints like "international orange" that usually contain frequency down converting materials. When you add some blue directly from the LED, you will see white.

Forge europa uk

put a yellow fluorescent filter in front of a blue one?

Bye. Jasen