EP2945466A3 - Light-emitting diode lighting device having multiple driving stages - Google Patents

Light-emitting diode lighting device having multiple driving stages Download PDF

Info

Publication number
EP2945466A3
EP2945466A3 EP15167698.8A EP15167698A EP2945466A3 EP 2945466 A3 EP2945466 A3 EP 2945466A3 EP 15167698 A EP15167698 A EP 15167698A EP 2945466 A3 EP2945466 A3 EP 2945466A3
Authority
EP
European Patent Office
Prior art keywords
current
envelope
controller
lighting device
light
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
EP15167698.8A
Other languages
German (de)
French (fr)
Other versions
EP2945466A2 (en
Inventor
Horng-Bin Hsu
Yi-Mei Li
Yung-Hsin Chiang
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.)
Iml Hongkong Ltd
Original Assignee
IML International
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 US14/277,029 external-priority patent/US9226354B2/en
Application filed by IML International filed Critical IML International
Publication of EP2945466A2 publication Critical patent/EP2945466A2/en
Publication of EP2945466A3 publication Critical patent/EP2945466A3/en
Ceased 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
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • 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

Landscapes

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

Abstract

An LED lighting device includes a slave driving stage and a master driving stage. The slave driving stage includes a first luminescent device and a first current controller for providing a constant current setting in an ON phase. The master driving stage includes a second luminescent device and a current control unit having a second current controller and a current envelope controller. The second current controller provides a current envelope in the ON phase. The current envelope controller sets a level of the current envelope according to a rectified AC voltage. The driving current is regulated by the first current controller according to the constant current setting when the constant current setting is smaller than the level of the current envelope, or by the second current controller according to the current envelope when the level of the current envelope is smaller than the constant current setting.
EP15167698.8A 2014-05-13 2015-05-13 Light-emitting diode lighting device having multiple driving stages Ceased EP2945466A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14/277,029 US9226354B2 (en) 2013-06-03 2014-05-13 Light-emitting diode lighting device having multiple driving stages

Publications (2)

Publication Number Publication Date
EP2945466A2 EP2945466A2 (en) 2015-11-18
EP2945466A3 true EP2945466A3 (en) 2016-07-20

Family

ID=53180571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15167698.8A Ceased EP2945466A3 (en) 2014-05-13 2015-05-13 Light-emitting diode lighting device having multiple driving stages

Country Status (1)

Country Link
EP (1) EP2945466A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202017102336U1 (en) * 2017-04-20 2018-07-23 Zumtobel Lighting Gmbh Circuit arrangement for operating bulbs
CN113939063B (en) * 2021-12-17 2022-03-22 深圳市明微电子股份有限公司 LED system power supply control method and LED system with controllable power supply

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194311A1 (en) * 2010-02-09 2011-08-11 Power Integrations, Inc. Phase angle measurement of a dimming circuit for a switching power supply
US20130127354A1 (en) * 2010-12-07 2013-05-23 Iml International Two-terminal current controller and related led lighting device
WO2013100736A1 (en) * 2011-12-29 2013-07-04 Seoul Semiconductor Co., Ltd Led luminescence apparatus
US20130257298A1 (en) * 2012-03-29 2013-10-03 Jeong In Cheon Power compensation device and light emitting diode illumination apparatus having the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110194311A1 (en) * 2010-02-09 2011-08-11 Power Integrations, Inc. Phase angle measurement of a dimming circuit for a switching power supply
US20130127354A1 (en) * 2010-12-07 2013-05-23 Iml International Two-terminal current controller and related led lighting device
WO2013100736A1 (en) * 2011-12-29 2013-07-04 Seoul Semiconductor Co., Ltd Led luminescence apparatus
US20130257298A1 (en) * 2012-03-29 2013-10-03 Jeong In Cheon Power compensation device and light emitting diode illumination apparatus having the same

Also Published As

Publication number Publication date
EP2945466A2 (en) 2015-11-18

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