White light emitting module and LED lighting apparatus
US9807843B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lighting apparatus may comprise a white light emitting module including a first white LED package emitting first white light corresponding to a quadrangular region defined by (0.3100, 0.3203), (0.3082, 0.3301), (0.3168, 0.3388) and (0.3179, 0.3282) in the CIE 1931 chromaticity diagram, a second white LED package emitting second white light corresponding to a quadrangular region defined by (0.4475, 0.3994), (0.4571, 0.4173), (0.4695, 0.4207) and (0.4589, 0.4021) in the CIE 1931 chromaticity diagram, a green LED package emitting green light having a peak wavelength of 520 nm to 545 nm, and a driving controller controlling levels of luminous flux of the first white light and the second white light to select a color temperature of desired white light and controlling a luminous flux of the green LED package so as to reduce a difference between color coordinates corresponding to the selected color temperature of the white light, and a black body locus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.