Light emitting device, lighting system, backlight unit for display device and display device
US8030840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2010 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | May 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/853
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
To enhance emission efficiency and color rendering, a light emitting device 1 comprises: at least one light source 3; at least one first emitting section 4 having at least one sort of luminescent material that can emit light including a wavelength component that is longer than the light emitted from light source 3 when excited by the light emitted from light source 3; at least one second emitting section 5 having at least one sort of luminescent material that can emit light including a wavelength component that is longer than the light emitted from first emitting section 4 when excited by the light emitted from light source 3 and first emitting section 4; wherein light emitting device 1 comprises at least one light shielding unit 6 that protects at least a part of the light emitted from first emitting section 4 from entering second emitting section 5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.