LED device comprising thin-film phosphor having two dimensional nano periodic structures
US7943947B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 25, 2005 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Apr 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/872
Abstract
Disclosed herein is an LED device which comprises a light-emitting diode (LED) and a laminate formed on the LED, the laminate consisting of a substrate and a phosphor thin film laminated on the substrate, wherein the phosphor thin film has a two-dimensional nanoperiodic structure formed in a forward direction of the thin film and has an extinction coefficient of 10−3 or less. The LED device has higher luminescent efficiency and luminance than conventional LED devices. In addition, since the LED device uses no slurry and a lesser amount of phosphor than conventional LED devices, it is advantageous in terms of optical homogeneity and reduced costs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.