For decades, vacuum fluorescent displays gave calculators, stereos, VCRs, car dashboards, and household appliances their unmistakable blue-green glow.

This video explores the rise and fall of the vacuum fluorescent display, from its origins in 1960s calculator technology to its peak inside millions of electronic products around the world.

Discover how VFDs worked, why they became so popular, how they competed with LEDs and LCDs, and why full-color flat-panel displays eventually pushed them out of the mass market.

We also look at the surprising fact that VFD technology never completely disappeared. Even today, specialized industrial equipment and a small number of manufacturers continue to keep the blue-green glow alive.

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