EP 2088833 A1 20090812 - Method for operating a motor vehicle Led-lighting device
Title (en)
Method for operating a motor vehicle Led-lighting device
Title (de)
Verfahren zum Betrieb einer Led-Kraftfahrzeugbeleuchtungseinrichtung
Title (fr)
Procédé destiné au fonctionnement d'un dispositif d'éclairage à Leds de véhicule automobile
Publication
Application
Priority
DE 102008008181 A 20080208
Abstract (en)
The method involves varying the modulation frequency continuously. The modulation frequency is increased or degraded in a frequency-sweep coming out from a starting frequency linear to a target frequency and is returned to the starting frequency by attaining the target frequency.
Abstract (de)
Verfahren zum Betrieb einer Kraftfahrzeugbeleuchtungseinrichtung umfassend wenigstens eine LED sowie eine die LED pulsweitenmoduliert ansteuernde Steuerungseinrichtung, wobei die Modulationsfrequenz kontinuierlich variiert wird.
IPC 8 full level
H05B 44/00 (2022.01)
CPC (source: EP US)
H05B 45/325 (2020.01 - EP); H05B 45/37 (2020.01 - EP US)
Citation (search report)
- [XI] WO 2006015476 A1 20060216 - TIR SYSTEMS LTD [CA], et al
- [X] US 5783909 A 19980721 - HOCHSTEIN PETER A [US]
- [X] EP 1033903 A2 20000906 - NOKIA MOBILE PHONES LTD [FI]
- [X] WO 03069958 A1 20030821 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- [Y] DE 10013207 A1 20010920 - TRIDONIC BAUELEMENTE [AT]
- [Y] US 4373146 A 19830208 - BONAZOLI ROBERT P, et al
- [A] GB 2416936 A 20060208 - KOITO MFG CO LTD [JP]
Designated contracting state (EPC)
DE FR GB IT
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2088833 A1 20090812; EP 2088833 B1 20110629; DE 102008008181 A1 20090813
DOCDB simple family (application)
EP 09000921 A 20090123; DE 102008008181 A 20080208