Lighting device and luminaire
US9995476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2014 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Apr 6, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In various embodiments, disclosed is a lighting device comprising a bulbous body mounted on a cap, and an inner surface of the bulbous body comprising a plurality of steps that are axially displaced relative to each other along a central axis of the lighting device. The plurality of steps comprising in one example a first step supporting a first plurality of solid state lighting elements; and a second step supporting a second plurality of solid state lighting elements, wherein the first step is located in between the cap and the second step. A luminaire including such a lighting device is also disclosed. The lighting device may further comprise a bulbous member separated from the cap by a transparent member having a stepped wall profile including the first step and the second step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.