Patent · US Active

Strontium oxyorthosilicate phosphors having improved stability under a radiation load and resistance to atmospheric humidity

US8173042B2 · kind B2 · utility

3Cited by

1References

2Claims

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	Sep 10, 2010
Grant date	May 8, 2012
Priority date	—
Expiry date	Sep 10, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH05B33/14
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Exemplary embodiments of the present invention relate to inorganic phosphors based on silicate compounds having improved stability under a resulting radiation load and resistance to atmospheric humidity, which are capable of converting higher-energy excitation radiation, i.e. ultraviolet (UV) or blue light, with high efficiency into a longer-wavelength radiation which may be in the visible spectral range. A calcium molar fraction x having a value between 0 and 0.05 is added to a silicate phosphor having the general formula Sr3-x-y-zCaxMIIySiO5:Euz.

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