LED illumination device and LED light-emission module
US9163790B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2013 |
| Grant date | Oct 20, 2015 |
| Priority date | — |
| Expiry date | Jun 5, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device and a light-emission module suppressing a change in color temperature when light emitted from a light-emission unit passes through an optical member. The illumination device has a lighting apparatus that includes: a first light-emission part emitting light of a daylight color temperature; a second light-emission part emitting light of an incandescent lamp color temperature; and the optical member, which is disposed on an optical path of the light emitted from the light-emission parts. A correlated color temperature of the light emitted from the second light-emission part is set to 2238 K. Due to this, in a spectrum of the light emitted from the second light-emission part, a maximum intensity within a wavelength range from 400 nm to 500 nm is no greater than one-tenth of a maximum intensity within a wavelength range from 300 nm to 800 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.