Blue LEDs: Where Do You Stand?

[Rain Man]

Here's an interesting bit of trivia. I did a study for a stadium scoreboard manufacturer about ten years ago, and learned about different scoreboard technologies. Apparently blue LEDs were a holy grail for a long time, because the materials to produce them were extremely costly. Red was cheap and easy to produce, but blue was more or less impossible. Apparently they finally figured out a way to do it, and I suspect that blue LEDs became popular just because there was pent-up demand.