EP 1701589 B1 20080827 - Electric circuit and method for monitoring a temperature of a light emitting diode
Title (en)
Electric circuit and method for monitoring a temperature of a light emitting diode
Title (de)
Schaltung und Verfahren zum Überwachen der Temperatur einer Leuchtdiode
Title (fr)
Circuit et procédé pour surveiller la température d'une diode électroluminescente
Publication
Application
Priority
EP 05005054 A 20050308
Abstract (en)
[origin: EP1701589A1] The present invention discloses an electric circuit 1 and method for monitoring a temperature of a light emitting diode 2. The inventive electric circuit 1 for monitoring a temperature of a light emitting diode 2 in a constant-current mode comprises a driver circuit 3 for supplying a predefined constant-current to the light emitting diode 2 to run the light emitting diode 2 in said constant-current mode, a storage 4 for storing a general dependency between a forward voltage of the light emitting diode 2 in said constant-current mode and the temperature of the light emitting diode 2, a voltage sensor 5 for measuring the actual forward voltage of the light emitting diode 2 in said constant-current mode and a calculator 6 for calculating the actual temperature of the light emitting diode 2 by using the detected general dependency and the measured actual forward voltage.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/12 (2020.01 - EP); H05B 45/22 (2020.01 - EP US); H05B 45/56 (2020.01 - EP); H05B 45/38 (2020.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1701589 A1 20060913; EP 1701589 B1 20080827; AT E406783 T1 20080915; DE 602005009317 D1 20081009
DOCDB simple family (application)
EP 05005054 A 20050308; AT 05005054 T 20050308; DE 602005009317 T 20050308