Lens for LED illumination
US9500323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Jun 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0066
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens may include a light incident surface, a first light emergent surface and side surfaces joining the light incident surface and the first light emergent surface. The light incident surface defines a space for accommodating light sources. The side surface includes at least one total-internal reflection surface and at least one second light emergent surface, a first part of light passing through the light incident surface is refracted by the first light emergent surface and emerges to generate first emergent light, a second part of light passing through the light incident surface is reflected by the total-internal reflection surfaces to the first light emergent surface and is refracted by the first light emergent surface and emerges to generate second light emergent light, and a third part of light passing through the light incident surface is refracted by the second light emergent surfaces and emerges to generate third emergent light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.