Light emitting device, lighting system, backlight unit for display device, and display device
US7737623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2005 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Nov 20, 2026 |
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 includes: at least one light source; at least one first emitting section 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 when excited by the light emitted from light source; at least one second emitting section 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 when excited by the light emitted from light source and first emitting section; wherein light emitting device includes at least one light shielding unit that protects at least a of the light emitted from first emitting section from entering second emitting section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.