Patent · US Expired

Illuminative device

US7052161B2 · kind B2 · utility

10Cited by

7References

18Claims

0Family size

Assignee

ROEHM GMBH & CO. KG · DE

Inventors

Hans Lichtenstein · Reinheim, DE
Jann Schmidt · Darmstadt, DE
Guenther Ittmann · Groß-Umstadt, DE
Eduard Albrecht · Frankfurt, DE

Key dates

Filing date	Nov 21, 2002
Grant date	May 30, 2006
Priority date	—
Expiry date	Dec 26, 2022

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21Y2115/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to an illuminative device essentionaly comprising a light source and a diffusing cover which is assigned to the light source and is made of colored plastic. The light source consites of one or several light-emitting diodes (LEDs) emitting a colored an substantially monocromatic light. The diffusing cover assigned thereto has a transmition (DIN 5036) of at least 35% and a reflection (DIN 5036) of at least 15% with the wavelength of the light-emitting diode operating at relative maximum energy.

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