Patent · US Active

LED with improved light emittance profile

US7750357B2 · kind B2 · utility

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0References

19Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Dietrich Bertram · Aachen, DE
Helmut Bechtel · Aachen, DE
Wolfgang Busselt · Roetgen, DE
Horst Greiner · Forchheim, DE

Key dates

Filing date	Jun 21, 2005
Grant date	Jul 6, 2010
Priority date	—
Expiry date	Jan 20, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH10K2102/331
WIPO fieldMicro-structural and nano-technology
WIPO sectorChemistry

Abstract

An LED includes a substrate layer with a first surface and a second surface opposing the first surface and having a refractive index of n1. A light emitter is provided on the first surface and an array of particles is arranged on the second surface. The index matching layer between the particles on the second surface has a refractive index of n2being n2≧n1−0.5 and n2≦n1+3. Further, the filling height of the index matching layer is lower than the maximum height of the array of particles.

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