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[quote][i]Algselt postitas: Rix[/i] Wikipedia, iseasi kas ka 100% tõde... [quote]The first visible-spectrum (red) LED was developed in 1962 by Nick Holonyak, Jr., while working at General Electric Company.[9] Holonyak first reported this breakthrough in the journal Applied Physics Letters on the December 1, 1962.[19][20] M. George Craford,[21] a former graduate student of Holonyak, invented the first yellow LED and improved the brightness of red and red-orange LEDs by a factor of ten in 1972.[22] In 1976, T. P. Pearsall created the first high-brightness, high-efficiency LEDs for optical fiber telecommunications by inventing new semiconductor materials specifically adapted to optical fiber transmission wavelengths.[23] The first high-brightness blue LED was demonstrated by Shuji Nakamura of Nichia Corporation in 1994 and was based on InGaN.[32] Its development built on critical developments in GaN nucleation on sapphire substrates and the demonstration of p-type doping of GaN, developed by Isamu Akasaki and H. Amano in Nagoya.[citation needed] In 1995, Alberto Barbieri at the Cardiff University Laboratory (GB) investigated the efficiency and reliability of high-brightness LEDs and demonstrated a "transparent contact" LED using indium tin oxide (ITO) on (AlGaInP/GaAs). The existence of blue LEDs and high-efficiency LEDs quickly led to the development of the first white LED, which employed a Y 3Al 5O 12:Ce, or "YAG", phosphor coating to mix down-converted yellow light with blue to produce light that appears white. Nakamura was awarded the 2006 Millennium Technology Prize for his invention.[33] [/quote] Seega puane LED leiutati 1962a, kollane 1972a, rohelise kohta infot ei leidnud, aga sinised ja valged leiutati alles 1994a. Küll aga ei saa ma päris 100% aru, mis on "transparent contact", kas selle all peetakse silmas just seda sama värvitut läätse? Sellisel juhul ikkagi on sul see roheline värvitu läätsega LED oluliselt uuem (leiutatud alles 1995a), kui su auto. EDIT: majanduskriis, ma olen sinuga nõus, et see on LED, lihtsalt ei usu ma, et see seal tehasest on, pole ju kuigi keeruline sinna see ise paigaldada hõõgpirni asemele (vajadusel koos takistiga). ;) [/quote]
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