who discovered the LED?
1907 by the British experimenter H. J. Round
1920 Russian Oleg Vladimirovich Losev
(his research, though distributed in Russian, German and British scientific journals, was ignored)
1955 Rubin Braunstein infrared
1961 Bob Biard and Gary Pittman
1962 Nick Holonyak Jr.(GE) the first practical LED
he is called "father of the light-emitting diode".
1907 by the British experimenter H. J. Round
1920 Russian Oleg Vladimirovich Losev
(his research, though distributed in Russian, German and British scientific journals, was ignored)
1955 Rubin Braunstein infrared
1961 Bob Biard and Gary Pittman
1962 Nick Holonyak Jr.(GE) the first practical LED
he is called "father of the light-emitting diode".