SRI created the world’s first blue light-emitting diode (LED) using gallium nitride in 1972. Although it was too feeble for practical use, this development pre-dated high-brightness blue LEDs by almost 20 years.
Blue LEDs formed the basis for the blue laser diodes used in today’s Blu-Ray DVD players.
Read our 75th anniversary blog feature
75 Years of Innovation: LED, first blue-light emitting diode
