WO2015006385A1 - A light emitting diode (led) lamp replacement driver for linear fluorescent lamps - Google Patents
A light emitting diode (led) lamp replacement driver for linear fluorescent lamps Download PDFInfo
- Publication number
- WO2015006385A1 WO2015006385A1 PCT/US2014/045841 US2014045841W WO2015006385A1 WO 2015006385 A1 WO2015006385 A1 WO 2015006385A1 US 2014045841 W US2014045841 W US 2014045841W WO 2015006385 A1 WO2015006385 A1 WO 2015006385A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- ballast
- led
- transformer
- input
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 238000013459 approach Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 241001481828 Glyptocephalus cynoglossus Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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]
- H05B45/30—Driver circuits
-
- 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]
- H05B45/30—Driver circuits
- H05B45/395—Linear regulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Definitions
- the present invention relates generally to replacement solutions for LED lamps. More particularly, the present invention relates to LED replacement drivers for electronic ballasts in linear fluorescent lamps (LFLs).
- LFLs linear fluorescent lamps
- LED lamps are now widely accepted as a more efficient and environmental friendly light source than fluorescent lamps. LED lamps allow electrical current to pass through the device in one direction while blocking current flow in the opposite direction. LED lamps provide many advantages as a lighting alternative compared to fluorescent lamps. Some benefits of using LED lamps include no mercury, operation in extreme cold conditions, longer life, and better energy efficiency.
- ballasts are switch start (preheat), rapid start, program start, and instant start.
- a switch start (preheat) electromagnetic ballast uses a combination filament-cathode at each end of the lamp in conjunction with a starter switch that initially connects the filaments in series with the ballast, thereby preheating the filaments prior to striking an arc tube.
- the starter switch closes, permitting a heating current to flow through each electrode.
- the starter switch triggers the supply voltage to be applied across the arc tube to initiate the discharge.
- the electrode heating power is turned off after the lamp discharge is initiated.
- a rapid start electronic ballast uses filament power windings within the ballast to provide a low voltage to the lamp prior to lamp ignition.
- the ballast applies voltage and heats the cathode simultaneously.
- the rapid start electronic ballast continues to heat the lamp electrodes even after the lamp is started.
- Program start electronic ballasts include circuitry to preheat the lamp filaments to apply cathode heat before lamp ignition, and then remove it once the lamp is ignited.
- the ballast applies power to the filaments first, then after a short delay to allow the cathodes to preheat, applies voltage to the lamps to strike an arc.
- Embodiments of the present invention provide a replacement driver circuit.
- the driver circuit includes an input port configured for coupling to a ballast and a transformer having a first side coupled to the input port.
- the driver circuit also includes a rectifier having an input portion coupled to a second side of the transformer and an output portion configured for coupling to a light source.
- the transformer is configured to match output characteristics of the ballast to input characteristics of the light source.
- the illustrious embodiments of the present invention provide a low- cost driver solution for LFL LED replacement lamps for electronic ballasts that eliminate the need for significant modification to the lamp's fixture.
- the embodiments enable the design of LFL replacement LED lamps, particularly those with rapid start, and program start ballasts, extending the market niche for LFL replacement solutions.
- FIG. 1 is a block diagram illustration of a LED replacement solution in a conventional magnetic ballast application.
- FIG. 2 is a block diagram illustration of another LED replacement solution in a conventional magnetic ballast application.
- FIG. 3 is a block diagram illustration of a LED replacement solution constructed and arranged in accordance with an embodiment of the present invention.
- FIG. 4 is a schematic diagram illustration of the LED driver in the circuit of FIG. 3 constructed and arranged in accordance with the embodiments.
- FIG. 5 is a flowchart of an exemplary method of practicing an embodiment of the present invention.
- FIGs. 1-2 are conventional implementations of LFL LED replacement circuits.
- FIG. 1 is a block diagram illustration of an LFL LED replacement circuit 100 for a conventional magnetic ballast application. More particularly, the circuit 100 is a physical solution for replacement of an LFL LED, such as a T8 tube.
- a single-ended power supply input 102 at one end of an LED tube 104, provides power for the circuit 100.
- An opposite end 105 of the tube 104 is shunted.
- a shunted or a dummy starter 106 that shorts the circuit 100.
- a phase shifting capacitor 108 Also included is a phase shifting capacitor 108.
- An LED driver 110 regulates driving current to LEDs (not shown) connected to the LED driver 110.
- LED drivers, such as the LED driver 110 have output characteristics that are matched to the desired output performance parameters of their associated LEDs.
- the circuit 100 requires a new user to modify the lamps fixture before it can be used.
- the starter (not shown) must be replaced.
- the circuit 100 is primarily used with magnetic/s witch start ballasts. Additionally, the circuit 100 can be used only in conventional electromagnetic switch start applications. Given this limited applicability, the circuit 100 is useful in only a small portion of the LFL LED replacement market.
- FIG. 2 is a block diagram illustration of another LFL LED replacement circuit 200 that can be used for conventional magnetic ballast applications.
- the replacement circuit 200 also includes a single double-ended power supply input 202 at one end of an LED tube 204.
- an opposite end 206 is open.
- An LED driver 208 performs power regulation and parameter matching.
- the LED replacement circuit 200 requires significant rewiring prior to use. Such rewiring cannot easily and safely be performed by a typical user, and usually requires an experienced electrician to perform the replacement. Additionally, the electrical regulations of many countries restrict the use of this type circuit, thereby limiting its applicability primarily to U.S. markets.
- FIG. 3 is a block diagram illustration of a LED replacement circuit 300 constructed in accordance with an embodiment of the present invention.
- the circuit 300 works with electronic ballasts and leverages the current limiting capability of existing ballast fixtures. Additionally, the circuit 300 does not require the user, or other person, to modify the lamps fixture prior to use. Additionally, the circuit 300 is a double-ended power inpu configuration included tubes for connection serially. This type fixture is widely used in offices, for example, in 2x2 foot fixtures and a variety of other existing off-the-shelf lamp fixtures.
- the circuit 300 includes a first input terminal 302 to receive power from an output terminal of a power supply (e.g., an electronic ballast output) to activate an LFL tube 303. Also included is a second input terminal 304 configured for connection to another power supply.
- An LED driver 305 performs power regulation and parameter matching between a ballast output and the input parameters required to drive a lighting source, such as LEDs.
- a single transformer is used to adjust the power to the LEDs.
- FIG. 4 is a detailed schematic diagram illustration of an exemplary driver circuit 400.
- the driver circuit 400 includes a more detailed illustration of the LED driver 305, in the LFL tube 303 of FIG. 3. As explained in greater detail below, the driver circuit 400 uses a single transformer 402 to match output characteristics of an electronic ballast 403 to parameters required operate an LED array 404.
- the driver circuit 400 can be used with serially connected LFL tubes, such as two foot LFL tubes at are commonly used in four tube office fixtures.
- Resistors 406 form an input port for the driver circuit 400 and receive an alternating current (AC) voltage output from the electronic ballast 403.
- An inductor 407 limits current and provides other adjustments necessary for the AC voltage before passing to the transformer 402.
- the transformer 402 reduces the AC voltage received from the ballast 403 to a level ultimately suitable for use as a power source for the LED array 404.
- a rectifier 408 converts the AC voltage from the ballast 403 into a direct current (DC) voltage for input into the LED array 404.
- the rectifier 408 permits the voltage flowing therethrough to flow in only one direction along a circuit path to the LEDs.
- the rectifier 408 can be implemented as a diode bridge, or some other suitable component.
- a capacitor 410 enhances performance of the LED array 404 by filtering out spikes and smoothing for the DC voltage that drives the LEDs.
- the exemplary driver circuit 400 includes specific components, the driver circuit 400 is merely one approach of matching output characteristics of an electronic ballast, such as the ballast 403, to parameters required to operate an LED array, such as the LED array 404. Other approaches would be readily apparent to one of skill in the art and would be within the spirit and scope of the present invention.
- the exemplary driver circuit 400 is used for matching and separating the input to the LED array 404 from and to the output from the ballast 403.
- a single transformer could separate and completely isolate the two sides of the driver circuit (the ballast output in the LED input) between the ballast and the LED array.
- one transformer can be used to perform the separating function while the matching of the parameters could be achieved using modulation techniques, such as pulse code modulation (PCM), pulse width modulation (PWM), and frequency modulation.
- PCM pulse code modulation
- PWM pulse width modulation
- frequency modulation such as frequency modulation
- FIG. 5 is a flowchart of an exemplary method 500 of practicing an embodiment of the present invention.
- a first type voltage is received as an output from a ballast on one side of only one transformer, the transformer being configured to adjust a level of the receive voltage.
- the first type voltage is converted to a second type voltage.
- the second type voltage is provided as an input to the LED array any manner responsive to input characteristics thereof.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016525440A JP6505096B2 (en) | 2013-07-11 | 2014-07-09 | Light emitting diode (LED) lamp replacement driver for straight tube fluorescent lamps |
BR112016000425A BR112016000425A8 (en) | 2013-07-11 | 2014-07-09 | replacement driver circuit and method for providing power |
CA2917760A CA2917760C (en) | 2013-07-11 | 2014-07-09 | A light emitting diode (led) lamp replacement driver for linear fluorescent lamps |
CN201480039568.2A CN105359626A (en) | 2013-07-11 | 2014-07-09 | A light emitting diode (LED) lamp replacement driver for linear fluorescent lamps |
EP14744410.3A EP3020255A1 (en) | 2013-07-11 | 2014-07-09 | A light emitting diode (led) lamp replacement driver for linear fluorescent lamps |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/939,245 | 2013-07-11 | ||
US13/939,245 US9380654B2 (en) | 2013-07-11 | 2013-07-11 | Light emitting diode (LED) lamp replacement driver for linear fluorescent lamps |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015006385A1 true WO2015006385A1 (en) | 2015-01-15 |
Family
ID=51228497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2014/045841 WO2015006385A1 (en) | 2013-07-11 | 2014-07-09 | A light emitting diode (led) lamp replacement driver for linear fluorescent lamps |
Country Status (8)
Country | Link |
---|---|
US (1) | US9380654B2 (en) |
EP (1) | EP3020255A1 (en) |
JP (1) | JP6505096B2 (en) |
CN (2) | CN110636663A (en) |
BR (1) | BR112016000425A8 (en) |
CA (1) | CA2917760C (en) |
TW (1) | TWI620464B (en) |
WO (1) | WO2015006385A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017146056A1 (en) * | 2016-02-24 | 2017-08-31 | 三菱電機株式会社 | Lamp system, illumination device, method for manufacturing lamp system, and method for assembling illumination device |
US10593330B2 (en) | 2014-10-09 | 2020-03-17 | Google Llc | Hotword detection on multiple devices |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9557044B2 (en) * | 2014-10-20 | 2017-01-31 | Energy Focus, Inc. | LED lamp with dual mode operation |
WO2017147385A1 (en) | 2016-02-24 | 2017-08-31 | Power Concepts, Llc | Ceiling light led retrofit kit |
US9713236B1 (en) * | 2016-09-07 | 2017-07-18 | Elb Electronics, Inc. | Solid-state lighting arrangement with startup delay circuit |
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WO2010069983A1 (en) * | 2008-12-16 | 2010-06-24 | Ledned Holding B.V. | Led tube system for retrofitting fluorescent lighting |
WO2010106375A2 (en) * | 2009-03-19 | 2010-09-23 | Juice Technology Limited | Electrical systems |
EP2477456A1 (en) * | 2011-01-14 | 2012-07-18 | Ontopx LED GmbH | Drive circuit for light-emitting diode array |
US20140084799A1 (en) * | 2012-09-24 | 2014-03-27 | Samsung Electronics Co., Ltd. | Light source driving device and illuminating apparatus using the same |
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DE202007016074U1 (en) | 2007-10-25 | 2009-03-12 | Bjb Gmbh & Co.Kg | lamp socket |
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JP2011044316A (en) * | 2009-08-20 | 2011-03-03 | Panasonic Electric Works Co Ltd | Lighting deice |
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WO2012114097A2 (en) | 2011-02-24 | 2012-08-30 | Novar Ed&S Limited | A luminaire comprising an led tube lamp and socket |
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2013
- 2013-07-11 US US13/939,245 patent/US9380654B2/en active Active
-
2014
- 2014-07-07 TW TW103123309A patent/TWI620464B/en not_active IP Right Cessation
- 2014-07-09 JP JP2016525440A patent/JP6505096B2/en not_active Expired - Fee Related
- 2014-07-09 CA CA2917760A patent/CA2917760C/en not_active Expired - Fee Related
- 2014-07-09 CN CN201910689103.6A patent/CN110636663A/en active Pending
- 2014-07-09 CN CN201480039568.2A patent/CN105359626A/en active Pending
- 2014-07-09 BR BR112016000425A patent/BR112016000425A8/en not_active Application Discontinuation
- 2014-07-09 WO PCT/US2014/045841 patent/WO2015006385A1/en active Application Filing
- 2014-07-09 EP EP14744410.3A patent/EP3020255A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2010069983A1 (en) * | 2008-12-16 | 2010-06-24 | Ledned Holding B.V. | Led tube system for retrofitting fluorescent lighting |
WO2010106375A2 (en) * | 2009-03-19 | 2010-09-23 | Juice Technology Limited | Electrical systems |
EP2477456A1 (en) * | 2011-01-14 | 2012-07-18 | Ontopx LED GmbH | Drive circuit for light-emitting diode array |
US20140084799A1 (en) * | 2012-09-24 | 2014-03-27 | Samsung Electronics Co., Ltd. | Light source driving device and illuminating apparatus using the same |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US10593330B2 (en) | 2014-10-09 | 2020-03-17 | Google Llc | Hotword detection on multiple devices |
WO2017146056A1 (en) * | 2016-02-24 | 2017-08-31 | 三菱電機株式会社 | Lamp system, illumination device, method for manufacturing lamp system, and method for assembling illumination device |
JPWO2017146056A1 (en) * | 2016-02-24 | 2018-09-27 | 三菱電機株式会社 | Lamp system and lighting device |
CN108700281A (en) * | 2016-02-24 | 2018-10-23 | 三菱电机株式会社 | The assemble method of lamp system, lighting device, the manufacturing method of lamp system and lighting device |
Also Published As
Publication number | Publication date |
---|---|
US9380654B2 (en) | 2016-06-28 |
BR112016000425A2 (en) | 2017-07-25 |
TWI620464B (en) | 2018-04-01 |
JP2016527677A (en) | 2016-09-08 |
TW201507545A (en) | 2015-02-16 |
US20150015150A1 (en) | 2015-01-15 |
CA2917760C (en) | 2018-06-12 |
CN105359626A (en) | 2016-02-24 |
JP6505096B2 (en) | 2019-04-24 |
BR112016000425A8 (en) | 2020-01-07 |
EP3020255A1 (en) | 2016-05-18 |
CN110636663A (en) | 2019-12-31 |
CA2917760A1 (en) | 2015-01-15 |
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