Illumination apparatus
US10197239B2 · kind B2 · utility
0Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Apr 30, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V29/85
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an illumination apparatus (100) comprising a light engine (3) and a first lampshade (1) for accommodating the light engine (3), wherein the first lampshade (1) has a first expansion coefficient, wherein the illumination apparatus (100) further comprises a second lampshade (2) for accommodating the first lampshade (1), wherein the second lampshade (2) has a second expansion coefficient smaller than the first expansion coefficient, and is configured such that the changes in size or shape of the first lampshade (1) can be restrained under a high temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.