LED light device with changable beam angle
US10386044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2017 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Dec 1, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an optical device capable of effecting changeable beam angles. The optical device includes a light source plate, a convergence lens, and at least two diffusion lenses. When one of the at least two diffusion lenses is in use, the rest of the at least two diffusion lenses are in a stand-by state. The optical device is configured such that the light emitted by the light source plate is collimated by the convergence lens and allowed to go through the diffusion lens in use to be diffused. The optical device is configured to cause the collimated light incident on refraction surfaces of the different diffusion lenses with different incident angles to exit from the different diffusion lenses with different emergence angles. The optical device is capable of employing different diffusion lenses for changing the beam angle of the optical device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.