Lighting device with efficient light-spreading lens system
US11125412B2 · kind B2 · utility
1Cited by
11References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2015 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Apr 28, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting device includes a light emitting diode (LED) that has a main axis of light emission. The lighting device also includes a lens element positioned adjacent the LED. The lens element has a geometry defined by at least partial revolution of a cross-sectional profile around an axis of revolution. The lens element is positioned relative to the LED such that the axis of revolution crosses the main axis of light emission of the LED. The lens element is operative to apply total internal reflection to at least some light rays emitted from the LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.