(19)
(11) EP 2 015 612 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.02.2012 Bulletin 2012/06

(43) Date of publication A2:
14.01.2009 Bulletin 2009/03

(21) Application number: 08160322.7

(22) Date of filing: 14.07.2008
(51) International Patent Classification (IPC): 
H05B 33/08(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 12.07.2007 EP 07112349

(71) Applicant: Shen Yu-Nung
Taipei City (TW)

(72) Inventor:
  • Shen Yu-Nung
    Taipei City (TW)

(74) Representative: Ganahl, Bernhard 
Huber & Schüssler Patentanwälte Truderinger Strasse 246
81825 München
81825 München (DE)

   


(54) Method for driving a LED


(57) The present invention relates to a method for driving a LED and to an illumination system comprising at least one LED.
According to the present invention a LED is driven by a pulse signal, wherein the pulse signal comprises pulses of a duration of T/n, wherein T is the duration of a single pulse and the corresponding pause in between two consecutive pulses and n is at least 2, and the current value of the pulses is at least double as much as the nominal constant current of said LED..
Thereby the light intensity is increased by n times while the power consumption is the same in comparison to driving that LED with a prescribed constant driving voltage and the prescribed constant driving current.







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