EP2015612A3 - Method for driving a LED - Google Patents

Method for driving a LED Download PDF

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Publication number
EP2015612A3
EP2015612A3 EP08160322A EP08160322A EP2015612A3 EP 2015612 A3 EP2015612 A3 EP 2015612A3 EP 08160322 A EP08160322 A EP 08160322A EP 08160322 A EP08160322 A EP 08160322A EP 2015612 A3 EP2015612 A3 EP 2015612A3
Authority
EP
European Patent Office
Prior art keywords
led
driving
pulses
duration
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08160322A
Other languages
German (de)
French (fr)
Other versions
EP2015612A2 (en
Inventor
Yu-Nung Shen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP08160322A priority Critical patent/EP2015612A3/en
Publication of EP2015612A2 publication Critical patent/EP2015612A2/en
Publication of EP2015612A3 publication Critical patent/EP2015612A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines

Abstract

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.
EP08160322A 2007-07-12 2008-07-14 Method for driving a LED Withdrawn EP2015612A3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08160322A EP2015612A3 (en) 2007-07-12 2008-07-14 Method for driving a LED

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07112349A EP2015611A1 (en) 2007-07-12 2007-07-12 Method for driving a LED
EP08160322A EP2015612A3 (en) 2007-07-12 2008-07-14 Method for driving a LED

Publications (2)

Publication Number Publication Date
EP2015612A2 EP2015612A2 (en) 2009-01-14
EP2015612A3 true EP2015612A3 (en) 2012-02-08

Family

ID=38596711

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07112349A Withdrawn EP2015611A1 (en) 2007-07-12 2007-07-12 Method for driving a LED
EP08160322A Withdrawn EP2015612A3 (en) 2007-07-12 2008-07-14 Method for driving a LED

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07112349A Withdrawn EP2015611A1 (en) 2007-07-12 2007-07-12 Method for driving a LED

Country Status (1)

Country Link
EP (2) EP2015611A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102468414B (en) * 2010-11-09 2014-08-13 四川新力光源股份有限公司 Pulse LED (Light Emitting Diode) white light emitting device
CN102466146B (en) * 2010-11-09 2014-06-25 四川新力光源股份有限公司 Impulse LED (light emitting diode) light-emitting device
WO2012137130A2 (en) 2011-04-04 2012-10-11 Sgm A/S Method for driving leds

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6028694A (en) * 1997-05-22 2000-02-22 Schmidt; Gregory W. Illumination device using pulse width modulation of a LED
GB2408315A (en) * 2003-09-18 2005-05-25 Radiant Res Ltd Illumination control system for light emitters
WO2007020556A1 (en) * 2005-08-15 2007-02-22 Philips Intellectual Property & Standards Gmbh Light source and method for producing light modifiable in colour and/or luminosity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6028694A (en) * 1997-05-22 2000-02-22 Schmidt; Gregory W. Illumination device using pulse width modulation of a LED
GB2408315A (en) * 2003-09-18 2005-05-25 Radiant Res Ltd Illumination control system for light emitters
WO2007020556A1 (en) * 2005-08-15 2007-02-22 Philips Intellectual Property & Standards Gmbh Light source and method for producing light modifiable in colour and/or luminosity

Also Published As

Publication number Publication date
EP2015612A2 (en) 2009-01-14
EP2015611A1 (en) 2009-01-14

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