History

In 1907 a British experimenter Henry Joseph Round is said to have reported the first light-emitting solid-state diode, but no one made use of this discovery until 1962 when Nick Holonyak, Jr. working at General Electrical Company first introduced the red diode, type GaAsP.

In 1971 LEDs in green, orange, yellow were available.

There are improvements and in 1993, discovered by Shuji Nakamura, the highly efficient InGaN diodes that are emitting blue and green and the conditions for creating white light are met.

In 1995 the first LED with white light created by luminescence conversion is introduced.