Side emitting LED and lens
US7254309B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2006 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens of a side emitting LED includes a bottom surface, an incident surface, a reflective surface, a first refractive surface, a second refractive surface and a third refractive surface. An light emitted by a LED enters the lens through the incident surface. A portion of the light is reflected by the reflective surface in an internal total reflection manner to the second refractive surface and emits out of the lens along a first optical path. The other portion of light directly emits out of the lens through the first refractive surface and the third refractive surface. A transitive surface is located between the first refractive surface and the reflective surface. Such a design allows the light entered the lens through the incident surface not cross with the transitive surface. Hence an improper reflection or refraction can be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.