Bat-wing lens design with multi-die
US9306136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2014 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Jun 13, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/853
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A batwing beam is produced from an optical emitter having a primary LED lens over a number of LED dies on a package substrate. The LED lens includes a batwing surface formed by rotating a parabolic arc about an end of the parabolic arc over a center of the optical emitter. A center of each of the LED dies is mounted to the package substrate about the focus of a parabola whose arc forms the batwing surface, for example, between about 0.5 to 1.5 of a focal distance from the vertex of the parabola. The batwing surface reflects light from the number of LED dies through total internal reflection (TIR) or through a reflectivity gel coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.