Global Patent Index - EP 2405716 B1

EP 2405716 B1 20170419 - Illumination device and method for providing it with power

Title (en)

Illumination device and method for providing it with power

Title (de)

Leuchtmittel und Verfahren zu dessen Stromversorgung

Title (fr)

Moyen d'éclairage et son procédé d'alimentation en courant

Publication

EP 2405716 B1 20170419 (DE)

Application

EP 10007123 A 20100709

Priority

EP 10007123 A 20100709

Abstract (en)

[origin: EP2405716A1] The unit has a detection unit determining temperature (II) of a LED. A power controller maintains current feed of the LED within a predetermined temperature range. The controller calibrates a characteristic curve, which specifies characteristics of an electrical resistance of a LED at temperature, by determining electrical resistance of a light-unit, and a surrounding temperature. An illumination unit and the LED are impacted with voltage or current in short time. The current and/or voltage failure is measured, and the surrounding temperature is queried at a motor vehicle side. An independent claim is also included for a method for power supply of an illumination unit for a motor vehicle lamp.

IPC 8 full level

H05B 33/08 (2006.01); H05B 44/00 (2022.01)

CPC (source: EP US)

H05B 45/18 (2020.01 - EP US)

Citation (examination)

MASANOBU SHIBATA: "Internal Resistance of an LED as a function of Temperature", INTERNATIONAL SCHOOL BANGKOK JOURNAL OF PHYSICS, 31 January 2010 (2010-01-31), pages 1 - 1, Retrieved from the Internet <URL:http://www.isb.ac.th/HS/JoP/vol4iss1/jan10.html>

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

DOCDB simple family (publication)

EP 2405716 A1 20120111; EP 2405716 B1 20170419; SI 2405716 T1 20170731

DOCDB simple family (application)

EP 10007123 A 20100709; SI 201031485 A 20100709