EP 3603344 B1 20220720 - ELECTRONIC CIRCUIT FOR DRIVING A STRING OF LIGHT-EMITTING DIODES
Title (en)
ELECTRONIC CIRCUIT FOR DRIVING A STRING OF LIGHT-EMITTING DIODES
Title (de)
ELEKTRONISCHE SCHALTUNG ZUM ANTRIEB EINES LEUCHTDIODENSTRANGS
Title (fr)
CIRCUIT ÉLECTRONIQUE POUR PILOTER UNE CHAÎNE DE DIODES ÉLECTROLUMINESCENTES
Publication
Application
Priority
- IT 201700032546 A 20170324
- IB 2018051963 W 20180323
Abstract (en)
[origin: WO2018172980A1] It is disclosed an electronic circuit (1) for driving a string of light-emitting diodes (5). The circuit comprises a current regulator (4) comprising an input terminal configured to receive a rectified alternating voltage (VRTF) and comprising a plurality of input terminals (It1, It2, It3, It4) connected to respective different voltages selected from the string of light-emitting diodes, the current regulator being configured to regulate the value of the current flowing through the string of light-emitting diodes. The electronic driving circuit further comprises an electronic switch (6) configured to switch between a closed and an open position, as a function of the value of a control signal (Vg). The electronic driving circuit further comprises a bias stage (8) comprising an input terminal configured to receive a voltage selected from a voltage internal to the string of light-emitting diodes and comprising an output terminal configured to generate, as a function of the selected voltage, said control signal controlling the electronic switch. The electronic driving circuit comprises, finally, a capacitor (7) interposed between the electronic switch and the string of light-emitting diodes.
IPC 8 full level
H05B 45/44 (2020.01); H05B 45/48 (2020.01)
CPC (source: EP)
H05B 45/44 (2020.01); H05B 45/48 (2020.01)
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 RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2018172980 A1 20180927; BR 112019019975 A2 20200428; EP 3603344 A1 20200205; EP 3603344 B1 20220720; ES 2928692 T3 20221122; IT 201700032546 A1 20180924; LT 3603344 T 20230125; MA 48993 A 20200205; MA 48993 B1 20221031
DOCDB simple family (application)
IB 2018051963 W 20180323; BR 112019019975 A 20180323; EP 18717700 A 20180323; ES 18717700 T 20180323; IT 201700032546 A 20170324; LT 18051963 T 20180323; MA 48993 A 20180323