EP2405717A1 - Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit - Google Patents

Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit Download PDF

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Publication number
EP2405717A1
EP2405717A1 EP10168978A EP10168978A EP2405717A1 EP 2405717 A1 EP2405717 A1 EP 2405717A1 EP 10168978 A EP10168978 A EP 10168978A EP 10168978 A EP10168978 A EP 10168978A EP 2405717 A1 EP2405717 A1 EP 2405717A1
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EP
European Patent Office
Prior art keywords
terminal
regulating circuit
led
anode
brightness adjusting
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Withdrawn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
EP10168978A
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English (en)
French (fr)
Inventor
Chiu-Min 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.)
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 EP10168978A priority Critical patent/EP2405717A1/de
Publication of EP2405717A1 publication Critical patent/EP2405717A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a LED lamp brightness adjusting circuit connectable to AC power and a LED lighting device using the brightness adjusting circuit, especially to a brightness adjusting circuit that allows a light regulator to alter the brightness of the LED lamp.
  • a conventional light adjustable lamp mainly includes an incandescent lamp (101) and a light regulator (102) connected in series.
  • the light regulator (102) is composed of silicon-controlled elements such as DIAC (diode for alternating current) and TRIAC (triode for alternating current).
  • DIAC diode for alternating current
  • TRIAC triode for alternating current
  • LED-based lamps are used as lighting equipment and are replacing conventional incandescent lamps for saving energy and reducing power consumption.
  • the LED-based lamps are driven by low DC voltages.
  • the light regulator (102) is unable to directly regulate the DC voltage and cannot adjust the brightness of the LED-based lamps. Therefore, users have to use particular regulators to substitute the existed light regulators and almost abandon all original related control circuits.
  • the present invention provides a LED lamp brightness adjusting circuit connectable to AC power to mitigate or obviate the aforementioned problems.
  • the main objective of the invention is to provide a LED lamp brightness adjusting circuit, wherein the brightness adjusting circuit allows a light regulator to change the brightness of the LED lamp.
  • the LED lamp brightness adjusting circuit includes a regulating circuit, multiple rectification diodes and filtering capacitors. Each filtering capacitor is connectable to a LED module in parallel.
  • the LED lamp brightness adjusting circuit is connected to an output terminal of a light regulator that receives an AC voltage. As the light regulator adjusts the amplitude of the AC voltage, the regulating circuit produces a regulated AC input voltage. The positive and negative half cycles of the regulated AC input voltage are further rectified and filtered to drive different corresponding LED modules. Because the amplitude of the drive voltages for the LED modules are adjustable, the brightness of the emitted light can be changed depend on a user's requirement.
  • a LED lamp brightness adjusting circuit in accordance with the present invention is operated with a light regulator 102 and comprises a regulating circuit 10, a first rectification diode D1, a second rectification diode D2, a first filtering capacitor C1, a second filtering capacitor C2 and a current limiting resistor R4.
  • the light regulator 102 has an input terminal connected to a first AC input terminal AC1 of an AC power source.
  • the regulating circuit 10 has a first terminal and a second terminal and comprises multiple resistors R1 to R3 connected in parallel.
  • the first terminal is coupled to an output terminal of the light regulator 102.
  • the second terminal is coupled to a second AC input terminal AC2 of the AC power source.
  • An optional fuse F1 may be connected between the regulator 102 and the regulating circuit 10 to provide over current protection.
  • the resistors R1 to R3 of the regulating circuit 10 in this embodiment have the same resistance value.
  • the regulating circuit 10 allows the light regulator 102 to linearly regulate the AC voltage and produces a regulated input voltage Vin across the first terminal and the second terminal.
  • the first rectification diode D1 has an anode and a cathode, wherein the anode is connected to the first terminal of the regulating circuit 10 and the cathode is connected to the first filtering capacitor C 1.
  • the first filtering capacitor C1 has a positive terminal and a negative terminal. The positive terminal is connected to the cathode of the first rectification diode D1.
  • the current limiting resistor R4 is connected between the second terminal of the regulating circuit 10 and the negative terminal of the first filtering capacitor C 1.
  • the first filtering capacitor C1 can be connected in parallel to a first LED module 20 that includes multiple light emitting diodes LED 1 to LED 40 connected in series.
  • the first LED module 20 has a positive input correspondingly connected to the positive terminal of the first filtering capacitor C1, and a negative input correspondingly connected to the negative terminal of the first filtering capacitor C1.
  • the second rectification diode D2 has an anode and a cathode, wherein the anode is connected to the second AC input terminal AC2 through the current limiting resistor R4, and the cathode is connected to the second filtering capacitor C2.
  • the second filtering capacitor C2 has a positive terminal and a negative terminal.
  • the positive terminal is connected to the cathode of the second rectification diode D2.
  • the negative terminal is connected to the first terminal of the regulating circuit 10 and the anode of the first rectification diode D 1.
  • the second filtering capacitor C2 can be connected in parallel to a second LED module 30 that includes multiple light emitting diodes LED 41 to LED 80 connected in series.
  • the second LED module 30 has a positive input correspondingly connected to the positive terminal of the second filtering capacitor C2, and a negative input correspondingly connected to the negative terminal of the second filtering capacitor C2.
  • the light regulator 102 can regulate the amplitude of the AC voltage to adjust the regulated input voltage Vin. Therefore, the driving voltages across the first and second filtering capacitors C1, C2 are changed. Because the first and the second LED modules 20, 30 are respectively coupled to the first and the second filtering capacitors C1, C2, the driving currents flowing through the LED modules 20, 30 are altered to adjust the brightness of the emitted light.
  • the positive half cycle voltage passes through the first rectification diode D 1 and is filtered by the first filtering capacitor C 1 to produce a first filtered driving voltage for activating the first LED module 20.
  • the negative half cycle voltage passes through the second rectification diode D2 and is filtered by the second filtering capacitor C2 to produce a second filtered driving voltage for activating the second LED module 30.
  • the first rectified driving voltage and the second rectified driving voltage are alternately produced.
  • the brightness adjusting circuit of the present invention allows the light regulator 102 to adjust the amplitude of the received AC voltage and produce a regulated input voltage Vin.
  • the regulated input voltage Vin is further rectified and filtered by the rectification diodes D1, D2 and the filtering capacitors C1, C2 to drive the LED modules 20, 30 and alter the brightness of the LED modules 20, 30.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP10168978A 2010-07-09 2010-07-09 Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit Withdrawn EP2405717A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10168978A EP2405717A1 (de) 2010-07-09 2010-07-09 Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10168978A EP2405717A1 (de) 2010-07-09 2010-07-09 Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit

Publications (1)

Publication Number Publication Date
EP2405717A1 true EP2405717A1 (de) 2012-01-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP10168978A Withdrawn EP2405717A1 (de) 2010-07-09 2010-07-09 Ans Wechselstromnetz anschließbare Schaltung zur Einstellung der Helligkeit einer LED-Lampe und LED-Beleuchtungsvorrichtung damit

Country Status (1)

Country Link
EP (1) EP2405717A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780695A (zh) * 2015-05-05 2015-07-15 卫斌鹏 一种led无极调光恒流驱动电源
CN106982495A (zh) * 2017-05-15 2017-07-25 广东工业大学 一种led驱动电路及led照明系统

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147366U (de) * 1986-03-11 1987-09-17
US5661645A (en) * 1996-06-27 1997-08-26 Hochstein; Peter A. Power supply for light emitting diode array
US20020047606A1 (en) * 2000-09-29 2002-04-25 Aerospace Optics, Inc. Power efficient LED driver quiescent current limiting circuit configuration
US20020158590A1 (en) * 1999-12-14 2002-10-31 Yutaka Saito Power supply and led lamp device
WO2005115058A1 (en) * 2004-05-19 2005-12-01 Goeken Group Corp. Dimming circuit for led lighting device with means for holding triac in conduction
WO2006004337A1 (en) * 2004-06-30 2006-01-12 Seoul Opto-Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US20070182338A1 (en) * 2006-01-20 2007-08-09 Exclara Inc. Current regulator for modulating brightness levels of solid state lighting
GB2435724A (en) * 2006-03-04 2007-09-05 Mood Concepts Ltd TRIAC dimming of LED lighting units
US20090251059A1 (en) * 2008-04-04 2009-10-08 Lemnis Lighting Patent Holding B.V. Dimmer triggering circuit, dimmer system and dimmable device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62147366U (de) * 1986-03-11 1987-09-17
US5661645A (en) * 1996-06-27 1997-08-26 Hochstein; Peter A. Power supply for light emitting diode array
US20020158590A1 (en) * 1999-12-14 2002-10-31 Yutaka Saito Power supply and led lamp device
US20020047606A1 (en) * 2000-09-29 2002-04-25 Aerospace Optics, Inc. Power efficient LED driver quiescent current limiting circuit configuration
WO2005115058A1 (en) * 2004-05-19 2005-12-01 Goeken Group Corp. Dimming circuit for led lighting device with means for holding triac in conduction
WO2006004337A1 (en) * 2004-06-30 2006-01-12 Seoul Opto-Device Co., Ltd. Light emitting element with a plurality of cells bonded, method of manufacturing the same, and light emitting device using the same
US20070182338A1 (en) * 2006-01-20 2007-08-09 Exclara Inc. Current regulator for modulating brightness levels of solid state lighting
GB2435724A (en) * 2006-03-04 2007-09-05 Mood Concepts Ltd TRIAC dimming of LED lighting units
US20090251059A1 (en) * 2008-04-04 2009-10-08 Lemnis Lighting Patent Holding B.V. Dimmer triggering circuit, dimmer system and dimmable device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ECKOLD F: "LEUCHTDIODEN RICHTIG EINGESETZT//CORRECT APPLICATIONS OF LIGHT EMITTING DIODES", E. ELEKTRONIK-TECHNOLOGIE, ELEKTRONIK-ANWENDUNGEN,ELEKTRONIK-MARKETING, KONRADIN VERLAG, LEINFELDEN-ECHTERDINGEN, DE, vol. 4, no. 5, 1 March 1986 (1986-03-01), pages 49 - 54, XP001086420, ISSN: 0174-7452 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104780695A (zh) * 2015-05-05 2015-07-15 卫斌鹏 一种led无极调光恒流驱动电源
CN104780695B (zh) * 2015-05-05 2018-03-02 厦门亚锝电子科技有限公司 一种led无极调光恒流驱动电源
CN106982495A (zh) * 2017-05-15 2017-07-25 广东工业大学 一种led驱动电路及led照明系统

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