vwbus.no

Kormt wrote:Fikk anmerkning på EU-kontroll om at blått lys som indikerer fjernlys ikke virket. Spesiell lyspære. Hvor får man tak i en slik?

ducce999s wrote:Hvit pære med blå plasthylse som gjenbrukes

Sent fra min E6553 via Tapatalk

OddN wrote:

ducce999s wrote:Hvit pære med blå plasthylse som gjenbrukes

Sent fra min E6553 via Tapatalk

Før i tiden solgte de et "repsett" som inneholdt både pære og blå hette.

Blue LED[edit]
Blue LEDs were first developed by Herbert Paul Maruska at RCA in 1972 using gallium nitride (GaN) on a sapphire substrate.[36] SiC-types were first commercially sold in the United States by Cree in 1989.[37] However, neither of these initial blue LEDs were very bright.

The first high-brightness blue LED was demonstrated by Shuji Nakamura of Nichia Corporation in 1994 and was based on InGaN.[38][39] In parallel, Isamu Akasaki and Hiroshi Amano in Nagoya were working on developing the important GaN nucleation on sapphire substrates and the demonstration of p-type doping of GaN. Nakamura, Akasaki, and Amano were awarded the 2014 Nobel prize in physics for their work.[40] 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).

In 2001[41] and 2002,[42] processes for growing gallium nitride (GaN) LEDs on silicon were successfully demonstrated. In January 2012, Osram demonstrated high-power InGaN LEDs grown on silicon substrates commercially[43], and GaN-on-silicon LEDs are in production at Plessey Semiconductors. As of 2017, some manufacturers are using SiC as the substrate for LED production, but sapphire is more common.

OddN wrote:Blå led med brukbar lysstyrke ble ikke kommersielt tilgjengelig før utpå nittitallet:

Wikipedia:

Blue LED[edit]
Interessant historikk

Den blå hetta har nøyaktig samme mål som en 5mm led, så fra framsiden ser alle like ut. Du ser ikke at det er en pære før du plukker instrumenthuset i biter.