Illumination apparatus
US9068716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2013 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Aug 23, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination apparatus includes a frame, an optical base plate, a light source and an optical film. The optical base plate is disposed in the frame and has a protrusion area at the center of the optical base plate. The protrusion area has at least a protrusion portion, which has at least a reflective surface. The reflective surface includes a plurality of inclined surfaces with different inclination angles. The light source is disposed in the frame and located adjacent to the periphery of the optical base plate. The light source is disposed corresponding to the reflective surface and has a plurality of light-emitting elements. Each light-emitting element has an optical axis direction, and the optical axis directions extend toward the protrusion area. The optical film is disposed at the frame, and the protrusion portion of the optical base plate protrudes toward the optical film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.