EP2876978A3 - Method of driving LED chips of same power but different rated voltages and currents - Google Patents

Method of driving LED chips of same power but different rated voltages and currents Download PDF

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Publication number
EP2876978A3
EP2876978A3 EP14178533.7A EP14178533A EP2876978A3 EP 2876978 A3 EP2876978 A3 EP 2876978A3 EP 14178533 A EP14178533 A EP 14178533A EP 2876978 A3 EP2876978 A3 EP 2876978A3
Authority
EP
European Patent Office
Prior art keywords
currents
same power
led chip
led chips
rated voltages
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Withdrawn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
EP14178533.7A
Other languages
German (de)
French (fr)
Other versions
EP2876978A2 (en
Inventor
Ming-Feng Lin
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.)
HEP Tech Co Ltd
Original Assignee
HEP Tech Co Ltd
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
Priority claimed from TW102133504A external-priority patent/TWI538556B/en
Application filed by HEP Tech Co Ltd filed Critical HEP Tech Co Ltd
Publication of EP2876978A2 publication Critical patent/EP2876978A2/en
Publication of EP2876978A3 publication Critical patent/EP2876978A3/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Withdrawn legal-status Critical Current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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
    • 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

Landscapes

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

Abstract

A method of driving LED chip (80)s of same power but different rated voltages and currents includes the following steps: set a predetermined power; provide a LED chip (80) which has a rated power accordant to the predetermined power; measure the LED chip (80) to obtain a working current thereof while the LED chip (80) is operated; provides a driving current to the LED chip (80), and maintain the driving current the same as the working current.
EP14178533.7A 2013-09-16 2014-07-25 Method of driving LED chips of same power but different rated voltages and currents Withdrawn EP2876978A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW102133504A TWI538556B (en) 2013-03-27 2013-09-16 Application of the same power different voltage and current specifications of the light-emitting diode chip drive method

Publications (2)

Publication Number Publication Date
EP2876978A2 EP2876978A2 (en) 2015-05-27
EP2876978A3 true EP2876978A3 (en) 2015-11-04

Family

ID=51224815

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14178533.7A Withdrawn EP2876978A3 (en) 2013-09-16 2014-07-25 Method of driving LED chips of same power but different rated voltages and currents

Country Status (1)

Country Link
EP (1) EP2876978A3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090146585A1 (en) * 2007-12-06 2009-06-11 Bin-Juine Huang Constant Power Driving-and-Controlling Method for Lighting Elements
EP2239997A1 (en) * 2009-04-09 2010-10-13 Lumination, LLC Power control circuit and method
EP2312569A2 (en) * 2009-10-16 2011-04-20 Samsung Electronics Co., Ltd. Method and apparatus for controlling power consumption of light source in mobile projector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090146585A1 (en) * 2007-12-06 2009-06-11 Bin-Juine Huang Constant Power Driving-and-Controlling Method for Lighting Elements
EP2239997A1 (en) * 2009-04-09 2010-10-13 Lumination, LLC Power control circuit and method
EP2312569A2 (en) * 2009-10-16 2011-04-20 Samsung Electronics Co., Ltd. Method and apparatus for controlling power consumption of light source in mobile projector

Also Published As

Publication number Publication date
EP2876978A2 (en) 2015-05-27

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