 |
|
||
 |
 |
|
|
|
|
What is the history of LED Lighting? LED Lighting .... LED lighting started being researched extensively in the early 60's at Texas Instruments, General Electric, & RCA Labortories. They discovered that miniture crystals (gallium arsenide) gave off infrared radiation when electric current was applied. The first (infrared) Light Emmitting Diode. Then came the first visable spectrum (colored-Red) Light Emmitting Diode. Light Emmitting material had been around since the early 1900's but not properly researched. Different forms of Gallium as well as other crystals determine the color of the LED. Blue LEDs were invented in 1971. White, Green, Blue, UV, Yellow, Amber, and Yellow LEDs went into commercial production in the early 90's. Red LEDs have been used in scientific and indicator devices since the early 70's. L.E.D. is an acronym for Light Emmiting Diode. The history of the LED goes back to 1907 with a form of electrolumenescent material. LED Lighting History 1907 - Light Emmiting Solid 1955 - Infrared LED 1962 - Red LED 1971 - Blue LED / 1993 production 1972 - Yellow LED / 90's production 1972 - Amber LED / 90's production 1995 - White LED / late 90's production late 90's - UV LED / late 90's production |
|
|||||||
|
|
||||||||
|
|
|