Light-emitting device
US9420662B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 5, 2012 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Sep 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K50/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting device (10) includes a first light-emitting region (100) and a second light-emitting region (200). The first light-emitting region (100) emits a light ray having a first color by making a first light-emitting layer group including at least two or more kinds of light-emitting layers emit light. In addition, the second light-emitting region (200) emits alight ray having the first color (for example, daylight color, natural white color, white color, warm white color, or incandescent color) by making a second light-emitting layer group including at least two or more kinds of light-emitting layers emit light. In addition, at least one kind of light-emitting layer included in the second light-emitting layer group emits a light ray having a different spectrum peak from all of the light-emitting layers included in the first light-emitting layer group. Therefore, the color-rendering properties of light emitted from the light-emitting device (10) are improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.