Lens, LED module and illumination system having same
US9255669B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 28, 2013 |
| Grant date | Feb 9, 2016 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination system includes at least an LED module, and at least an illuminated area. The LED module includes an LED, and a lens mounted in light path of the LED. The lens includes a light source recess, a first light emitting surface, a critical reflecting surface, and a second light emitting surface. The first light emitting surface can receive more light quantity than the second light emitting surface. In result, although the light emitted from the first light emitting surface may have greater attenuation than the light emitted from the second light emitting surface, light emitted from the first light emitting surface, which is father to the illuminated are, can make up the intensity losses of attenuation as the first light emitting surface receives more light quantity than the second light emitting surface. As a result, the illumination system has a uniform illumination pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.