Compact LED light engine with reflector cups and highly directional lamps using same
US8789969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2010 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Dec 11, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light engine comprises a plurality of light emitting diode (LED) devices arranged in a plane and a corresponding plurality of reflector cups wherein each LED device is disposed in a corresponding reflector cup and wherein the light engine does not include either a diffuser or a light mixing cavity. A directional lamp comprises the aforesaid light engine and an imaging lens arranged to generate an image of the light engine at about infinity. The directional lamp may further include a collecting reflector (for example, a conical, parabolic, or compound parabolic reflector) extending between a relatively narrower entrance aperture at which the light engine is disposed and a relatively wider exit aperture at which the imaging lens is disposed. The imaging lens may be arranged to generate a defocused image of the light engine at about infinity to soften the beam edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.