Light emitting device including a fluorescent material layer
US8952409B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2013 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Feb 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8514
Abstract
According to one embodiment, a semiconductor light-emitting device includes a semiconductor light-emitting layer, a pair of electrodes, a fluorescent material layer and a chromaticity adjusting layer. The semiconductor light-emitting layer emits first light. The pair of electrodes is connected to the semiconductor light-emitting layer. The fluorescent material layer covers at least a center portion of the semiconductor light-emitting layer, and contains a fluorescent material to absorb the first light and radiate second light. The chromaticity adjusting layer covers at least a peripheral portion of the semiconductor light-emitting layer, is exposed to outside, and contains a fluorescent material with a concentration lower than a concentration of the fluorescent material in the fluorescent material layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.