The LED was invented 50 years ago at GE. I didn't know they were that old. I could have sworn the displays we were putting in planes at Boeing in the 70's were incandescent segment displays. I remember LED watches from the '70s. But no, 1962.
Get a load of the picture. When I first started at Boeing there were white shirts. There were narrow ties. There were pocket protectors. But there were no bow ties, no suspenders. Lot of class on display at GE. Lot of class.
http://www.greentechmedia.com/articles/read/happy-birthday-the-led-enters-middle-age