Patent · US Active

Light emitting device

US8066909B2 · kind B2 · utility

10Cited by

38References

11Claims

0Family size

Assignee

Seoul Semiconductor Co., Ltd. · KR

Inventors

Gundula Roth · Levenhagen, DE
Walter Tews · Greifswald, DE
Chung Hoon Lee · Ansan-si, KR

Key dates

Filing date	Nov 30, 2007
Grant date	Nov 29, 2011
Priority date	—
Expiry date	Dec 17, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/8512
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A light emitting device is disclosed. The light emitting device may include a light emitting diode (LED) for emitting light and a phosphor adjacent to the LED. The phosphor may be excitable by light emitted by the LED and may include a first compound having a host lattice comprising first ions and oxygen. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and the first compound may have an Olivin crystal structure, a β-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the light emitted by the LED.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.