White color light emitting diode and neutral color light emitting diode
US6337536B1 · kind B1 · utility
139Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1999 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Jun 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/857
Abstract
A white color or neutral color LED having an n-type ZnSe single crystal substrate doped with I, Cl, Br, Al, Ga or In as SA-emission centers and an epitaxial film structure including a ZnSe, ZnCdSe or ZnSeTe active layer and a pn-junction. The active layer emits blue or bluegreen light. The SA-emission centers in the ZnSe substrate convert blue or bluegreen light to yellow or orange SA-emission. The blue or bluegreen light from the epitaxial film structure and the yellow or orange light from the ZnSe substrate synthesize white color light or neutral color light between red and blue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.