EP2365734A3 - Method for operating an LED assembly - Google Patents

Method for operating an LED assembly Download PDF

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Publication number
EP2365734A3
EP2365734A3 EP11157797A EP11157797A EP2365734A3 EP 2365734 A3 EP2365734 A3 EP 2365734A3 EP 11157797 A EP11157797 A EP 11157797A EP 11157797 A EP11157797 A EP 11157797A EP 2365734 A3 EP2365734 A3 EP 2365734A3
Authority
EP
European Patent Office
Prior art keywords
led
leds
operating
turned
power
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.)
Ceased
Application number
EP11157797A
Other languages
German (de)
French (fr)
Other versions
EP2365734A2 (en
Inventor
Christina Obenaus
Thomas Obenaus
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
Publication of EP2365734A2 publication Critical patent/EP2365734A2/en
Publication of EP2365734A3 publication Critical patent/EP2365734A3/en
Ceased legal-status Critical Current

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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Landscapes

  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zu Betrieb einer LED-Anordnung zur Beleuchtung, Hinterleuchtung, Bestrahlung oder Signalisation, welches eine oder mehr Leuchtdiode I umfasst, welche mit geschalteter Gleichspannung betrieben werden. Um bei möglichst unverminderter Helligkeit eine Verringerung der Leistungsaufnahme der LED-Anordnung zu ermöglichen, wird jede LED I der LED-Anordnung über ein ihr zugeordnetes Schaltelement E mit der Stromquelle D während eines Einschaltzustandes verbunden und während eines darauf folgenden Ausschaltzustandes wieder getrennt wird, wobei mittels einer Steuerschaltung F eine solche Taktfrequenz größer 100 Hz eingestellt wird, dass entweder die Beleuchtungsstärke im getakteten Betrieb von jenem im ungetakteten Betrieb mit dem für die LED I vorgegebenen charakteristischen Betriebsstrom um höchstens 5% abweicht oder dass, bei zumindest zwei LEDs I, stets nur ein Teil der LEDs I eingeschaltet ist und in zwei aufeinander folgenden Einschaltzuständen jeweils andere LEDs I eingeschaltet werden.

Figure imgaf001
The invention relates to a method for operating an LED arrangement for illumination, backlighting, irradiation or signaling, which comprises one or more light-emitting diode I, which are operated with switched DC voltage. In order to enable a reduction in the power consumption of the LED array at the lowest possible brightness, each LED I of the LED array is connected via its associated switching element E to the power source D during a power-on state and is disconnected during a subsequent off state again, by means of a control circuit F such a clock frequency is set greater than 100 Hz, that either the illuminance in the clocked operation of that in the untimed operation with the predetermined for the LED I characteristic operating current deviates by more than 5% or that, at least two LEDs I, always only one Part of the LEDs I is turned on and in two successive switch states each other LEDs I are turned on.
Figure imgaf001
EP11157797A 2010-03-11 2011-03-11 Method for operating an LED assembly Ceased EP2365734A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010011057 2010-03-11

Publications (2)

Publication Number Publication Date
EP2365734A2 EP2365734A2 (en) 2011-09-14
EP2365734A3 true EP2365734A3 (en) 2012-06-27

Family

ID=44201960

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11157797A Ceased EP2365734A3 (en) 2010-03-11 2011-03-11 Method for operating an LED assembly

Country Status (1)

Country Link
EP (1) EP2365734A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3020122B1 (en) * 2014-04-22 2018-07-13 Renault S.A.S. METHOD FOR CONTROLLING A LIGHT EMITTING DIODE LIGHT OR SIGNALING LIGHT FOR A MOTOR VEHICLE
US11244930B2 (en) 2018-08-10 2022-02-08 Innolux Corporation Electronic device with light emitting units with reduced power consumption
IT202000023632A1 (en) 2020-10-07 2022-04-07 Zaglio S R L UNIT AND METHOD OF POWER SUPPLY FOR LED LIGHTING DEVICES

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005107328A2 (en) * 2004-04-23 2005-11-10 Lighting Science Group Corporation Electronic light generating element light bulb
WO2007035883A2 (en) * 2005-09-20 2007-03-29 California Micro Devices Corporation Driving parallel strings of series connected leds
US20080037262A1 (en) * 1999-05-24 2008-02-14 Bruce Wesson Loaded LED bulbs for incandescent/flourescent/neon/xenon/halogen bulbs replacement in load sensitive applications and more
US20090015170A1 (en) * 2007-07-12 2009-01-15 Yu-Nung Shen Method for Driving LED
US20090079363A1 (en) * 2007-04-20 2009-03-26 Analog Devices, Inc. System for time-sequential led-string excitation
DE102009002072A1 (en) * 2008-04-01 2009-10-08 Infineon Technologies Austria Ag System and method for a multi-channel control system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008013638U1 (en) 2008-10-17 2008-12-24 Bocom Energiespar-Technologien Gmbh Low-voltage lighting system and control circuit for use in a low-voltage lighting system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080037262A1 (en) * 1999-05-24 2008-02-14 Bruce Wesson Loaded LED bulbs for incandescent/flourescent/neon/xenon/halogen bulbs replacement in load sensitive applications and more
WO2005107328A2 (en) * 2004-04-23 2005-11-10 Lighting Science Group Corporation Electronic light generating element light bulb
WO2007035883A2 (en) * 2005-09-20 2007-03-29 California Micro Devices Corporation Driving parallel strings of series connected leds
US20090079363A1 (en) * 2007-04-20 2009-03-26 Analog Devices, Inc. System for time-sequential led-string excitation
US20090015170A1 (en) * 2007-07-12 2009-01-15 Yu-Nung Shen Method for Driving LED
DE102009002072A1 (en) * 2008-04-01 2009-10-08 Infineon Technologies Austria Ag System and method for a multi-channel control system

Also Published As

Publication number Publication date
EP2365734A2 (en) 2011-09-14

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Inventor name: DIE ANDERE ERFINDER HABEN AUF IHRE NENNUNG VERZICH

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