Direct type illuminating device
US7566145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jun 28, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2105/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A direct type illuminating device includes a light source unit, a reflector plate, a diffuser plate, and a lens module. The light source unit provides source light beams. The reflector plate and the diffuser plate are spaced at an interval from each other, and the light source unit is interposed between the reflector plate and the diffuser plate. The lens module surrounds the light source unit such that the lens module is interposed between the light source unit and the reflector and diffuser plates. An outer curved surface of the lens module has a radius of curvature different from a radius of curvature of an outer curved surface of the light source unit such that the source light beams provided by the light source unit are refracted by the lens module to result in change of traveling directions of the source light beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.