Phosphor illumination optics for LED light sources
US7719022B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2008 |
| Grant date | May 18, 2010 |
| Priority date | — |
| Expiry date | May 6, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
Abstract
Devices and methods for collecting and distributing light from a light emitting diode (LED) emitter onto a phosphor layer to produce substantially white light are provided. The devices may include a reflective cavity with a reflective material, surrounding the reflective cavity, with a reflective side of the reflective material facing towards the inside of the reflective cavity. Further, the devices may incorporate an LED on one end of the reflective cavity and a phosphor layer on another end. Additionally, the devices may use a gradient index (GRIN) rod lens to refract light produced from the LED onto a phosphor surface with an LED on one end of the GRIN rod lens and the phosphor layer on the other end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.