Patent · US Active

Enhanced emission from pc-LEDs using IF filters

US7800287B2 · kind B2 · utility

19Cited by

7References

13Claims

0Family size

Assignee

OSRAM SYLVANIA Inc. · US

Inventors

Yi Zheng · Lynnfield, US
Bruce L. Bateman · Fremont, US
Matthew A. Stough · Exeter, US
Madis Raukas · Boston, US

Key dates

Filing date	Aug 24, 2007
Grant date	Sep 21, 2010
Priority date	—
Expiry date	Mar 9, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/28
WIPO fieldOptics
WIPO sectorInstruments

Abstract

White-light efficiency from a light emitting diode is enhanced by recycling inwardly penetrating light outwardly by application of a multi-layer, thin film filter between the LED die and the phosphor layer. This procedure increases the package extraction efficiency.

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