NICHIA Riya Chemical, a famous LED chip manufacturer and Japanese company, was founded in 1956, and developed the world's first blue LED( 1993) and the world's first pure green LED( 1995), with subsidiaries all over the world. ?
technical superiority
1. The first commercialized GaN-based blue LED/LD；; ;
2. Have the best phosphor technology at present;
3. Patent of blue unexcited yellow phosphor technology;
4. Epitaxial growth technology of sapphire village bottom.
White LED is usually formed by two methods. The first method is to use "blue light technology" and phosphor to form white light; The second is a variety of monochromatic light mixing methods. These two methods have successfully manufactured white light devices.
German Hella Company developed the airplane reading lamp by using white LED. A street in Canberra, the capital of Australia, has used white LED as street lighting. China's urban traffic management lights are also replacing the early traffic order indicators with white LEDs. It can be predicted that in the near future, white LED will definitely enter the home to replace the existing lighting.