Patent · US Active

Lighting device with LED chip and protective cast

US9380652B2 · kind B2 · utility

1Cited by

2References

9Claims

0Family size

Assignee

OSRAM GmbH · DE

Inventors

Krister Bergenek · Regensburg, DE
Andreas Biebersdorf · Regensburg, DE
Gertrud Kraeuter · Regensburg, DE
Joerg Sorg · Regensburg, DE
Reiner Windisch · Nittendorf, DE

Key dates

Filing date	Apr 19, 2013
Grant date	Jun 28, 2016
Priority date	—
Expiry date	Aug 19, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH10H20/882
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The lighting device has at least one LED chip that is potted by means of a potting compound, which potting compound has a light-transmissive, castable and curable matrix material comprising scattering volumes as filler material, wherein the scattering volumes are distributed inhomogeneously over a thickness of the potting compound and these scattering volumes have a lower density than the matrix material in its castable state. A method is used for producing a lighting device, which comprises at least one LED chip, by means of at least the following steps: potting the at least one LED chip by means of a potting compound containing scattering volumes, wherein the scattering volumes have a lower density than a matrix material of the potting compound in this state; curing the potting compound so that an inhomogeneous distribution of the scattering volumes is obtained owing to floating of the scattering volumes in the matrix material.

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