History of LEDs

History Of LED's

It has been 50 years since the first breakthrough was made with a new type of alloy that allowed them to create the first practical LED, that has made LED Lighting so advanced today.

Dr Nick Holonyak and his team of researchers at General Electric created the first practical visible spectrum LED at GE'S Advanced Semiconductor Laboratory in Sycracuse, New York.

LED Timeline

1907 - Henry Round reports light emission from a crystal detector

1927 - Oleg Losev notes that silicon carbide crystal diodes used in radios glowed when excited by an electrical current

1939 - Zoltan Bay and Gyorgy szigeti patent a silicon carbide electroluminescent lighting device, considered to the predecessor to the modern-day LED

1951 -William Shockley, co-inventor of the transistor, files a patent for an infrared LED

1952 - Kurt Lehovec, inventor of junction isolation for intergrated circuits applies for patent for SiC visible lights LED's

1958 - Rubin Braunstein and Egon Loebner patent a green LED made from a lead antimonde/Germanium alloy

1962 - Nick Holonyak creates the first practical visible-spectrum LED at Ge's advanced Semiconductor Laboratory in New York

1964 - IBM uses LEDs on circuit boards in an early mainframe computer

1968 - Hewlett Packard integrates LEDs into early hand-held calculators

1971 - Jacques Pankove pioneers first blue LEDs

1972 - Former graduate student of Holonyak, M Georges Craford, invents the first yellow LED - improving the brightnes of red and red-orange LEDs

1976 - Tom Pearsall creates the first high-brightness, high efficiency LED's for optical fibre telecommuications

1993 - Shuji Nakamura creates high-brightness blue LED

2006 - Nakamura wins the Millennium Technology Prize for development of a white LED

2007 - The Italian village of Torraca becomes first township to convert its entire illumination system to LED

2008 - Audi is the first car to use fully LED headlamps