EP 1844631 A1 20071017 - METHOD AND ELECTRONIC CONTROL SYSTEM FOR COMPENSATING THE AGEING-RELATED LOSS OF LUMINOSITY OF AN ELECTROLUMINESCENCE ELEMENT
Title (en)
METHOD AND ELECTRONIC CONTROL SYSTEM FOR COMPENSATING THE AGEING-RELATED LOSS OF LUMINOSITY OF AN ELECTROLUMINESCENCE ELEMENT
Title (de)
VERFAHREN UND ANSTEUERELEKTRONIK ZUM AUSGLEICH DES ALTERUNGSBEDINGTEN HELLIGKEITSVERLUSTS EINES ELEKTROLUMINESZENZELEMENTS
Title (fr)
PROCEDE ET SYSTEME ELECTRONIQUE DE COMMANDE POUR COMPENSER LA PERTE DE LUMINOSITE DUE AU VIEILLISSEMENT D'UN ELEMENT ELECTROLUMINESCENT
Publication
Application
Priority
- EP 2005056379 W 20051201
- DE 102004060201 A 20041214
Abstract (en)
[origin: WO2006063938A1] The invention relates to a method for compensating the ageing-related loss of luminosity of an electroluminescence element (2), according to which the cumulative electrical energy supply, i.e. the integral of the supplied electrical power over the period of operation, is used as a criteria for the compensating regulation of the operating voltage. The processing unit (5) continuously integrates the supplied electrical power over time. The relation between the operating voltage and the emission luminosity of the electroluminescence element (2) is stored in the memory (6) for different cumulative electrical energy supplies. The stored data can be defined by means of a model or estimated on the basis of empirical values. The relation can be stored in the form of values stored in a tabular manner or as an analytical function in the memory (6). The processing unit (5) determines the associated effective operating voltage Ui for the luminosity nominal value B and the cumulative energy supply /Pi dt, and adjusts the voltage supply (3) to said value by means of a control signal emitted from the signal output (10).
IPC 8 full level
H05B 33/08 (2006.01); H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 44/00 (2022.01 - EP US); H05B 47/20 (2020.01 - EP US); Y02B 20/30 (2013.01 - EP US)
Citation (search report)
See references of WO 2006063938A1
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 LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006063938 A1 20060622; DE 102004060201 A1 20060629; EP 1844631 A1 20071017; US 2008224070 A1 20080918; US 7915839 B2 20110329
DOCDB simple family (application)
EP 2005056379 W 20051201; DE 102004060201 A 20041214; EP 05815879 A 20051201; US 79316605 A 20051201