Light-projecting device
US10281104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2018 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Apr 2, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0977
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-projecting device includes a base unit, a light-emitting unit, a first reflecting unit and a lens unit. The light-emitting unit is disposed on the base unit. The light-emitting unit includes a first light-emitting structure, and the first light-emitting structure includes a first light-emitting surface. The first reflecting unit is disposed on the base unit and corresponding to the light-emitting unit. The lens unit is corresponding to the first reflecting unit. The lens unit includes a lens optical axis. The first light-emitting surface is inclined relative to the lens optical axis to improve the light-concentrating efficiency of the light-projecting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.