Illumination devices comprising white light emitting diodes and diode arrays and method and apparatus for making them
US7157745B2 · kind B2 · utility
82Cited by
30References
28Claims
0Family size
Inventors
Key dates
| Filing date | Apr 9, 2004 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Jul 6, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/0361
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
In accordance with the invention, an illumination device comprises a substrate having a surface and a cavity in the surface. At least one light emitting diode (“LED”) is mounted within the cavity, and a monolayer comprising phosphor particles overlies the LED. The phosphor monolayer is adhered to the LED by a monolayer of transparent adhesive material. An optional optical thick layer of transparent material overlies the phosphor monolayer to encapsulate the LED and optionally to form a lens. Methods and apparatus for efficiently making the devices are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.