Patent · US Active

Light emitting device having strontium oxyorthosilicate type phosphors

US8963173B2 · kind B2 · utility

0Cited by

4References

20Claims

0Family size

Assignees

Seoul Semiconductor Co., Ltd. · KR
LITEC-LP Gmbh · DE

Inventors

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

Key dates

Filing date	Dec 20, 2010
Grant date	Feb 24, 2015
Priority date	—
Expiry date	Mar 14, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/8585
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Exemplary embodiments of the present invention relate to light emitting devices including strontium oxyorthosilicate-type phosphors. The light emitting device includes a light emitting diode, which emits light in the UV or visible range, and phosphors disposed around the light emitting diode to absorb light emitted from the light emitting diode and emit light having a different wavelength from the absorbed light. The phosphors include an oxyorthosilicate phosphor having a general formula of Sr3-x-y-zCaxMIIySiO5: Euz with a calcium molar fraction in the range of 0<x≦0.05.

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