Patent · US Active

Light-emitting device

US7859185B2 · kind B2 · utility

2Cited by

1References

12Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Hans-Helmut Bechtel · Roetgen, DE
Wolfgang Busselt · Roetgen, DE
Peter Josef Schmidt · Aachen, DE

Key dates

Filing date	Jan 15, 2007
Grant date	Dec 28, 2010
Priority date	—
Expiry date	Jun 12, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/882
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A light-emitting device comprising a solid-state light source (3), at least one conversion element (4) and a light-scattering element (6), wherein the solid-state light source (3) is provided to emit a first part (511) of a primary radiation for entry into the light-scattering element (6) and a second part (512) of a primary radiation for entry into the conversion element (4) for at least partial conversion into at least one secondary radiation (521, 522), the light-scattering element (6) is provided to generate a mixed radiation (5) having a Lambertian light distribution pattern from the first part (511) of the primary radiation, the secondary radiation (521, 522) and a portion of the second part (512) of the primary radiation that has not been converted in the conversion element (4), and the first part (511) of the primary radiation leaves the light-emitting device without having passed the conversion element (4).

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