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WO2014031627A1 - Wireless led lighting - Google Patents

Wireless led lighting Download PDF

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Publication number
WO2014031627A1
WO2014031627A1 PCT/US2013/055771 US2013055771W WO2014031627A1 WO 2014031627 A1 WO2014031627 A1 WO 2014031627A1 US 2013055771 W US2013055771 W US 2013055771W WO 2014031627 A1 WO2014031627 A1 WO 2014031627A1
Authority
WO
WIPO (PCT)
Prior art keywords
module
power transmitter
led
power
coil
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
PCT/US2013/055771
Other languages
French (fr)
Inventor
Hideto Takagishi
Jun Liu
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.)
Diodes Inc
Original Assignee
Diodes Inc
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 Diodes Inc filed Critical Diodes Inc
Publication of WO2014031627A1 publication Critical patent/WO2014031627A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • 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
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/39—Circuits containing inverter bridges
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/19—Controlling the light source by remote control via wireless transmission

Definitions

  • Fig. 1 is a system block diagram according to an embodiment of the invention.
  • Fig. 2 is a high level block diagram according to an embodiment of the invention.
  • FIGS. 3 and 4 are assembly block diagrams according to an
  • Figs. 5-7 are photographs of prototypes according to embodiments of the invention. DETAILED DESCRIPTION
  • FIG. 1 is high level circuit diagram of an LED lighting system (100), illustrative of an embodiment in accordance with the invention. It depicts a power transmitter module (110) that provides power to an LED receiver module
  • the power transmitter module is wirelessly connected to the LED receiver module without the need of any electrically conductive wires between them.
  • the power transmitter module may include a power supply circuit (112) to provide power to circuit components in the power transmitter module.
  • the power supply circuit may receive power from any suitable power source.
  • the power source may be an AC source, which may include an AC to DC converter (114).
  • the power source may be a DC source (e.g., batteries), which may be shifted to a suitable DC level by an DC to DC level shifter (116).
  • the power source may be solar power (118).
  • a power indicator LED (113) may be provided to inform the user that the power transmitter module is receiving power.
  • a controller provides control circuitry and control logic to operate the power transmitter module.
  • a resonant circuit receives power from a half-bridge driver circuit (119) and drives a transmitter coil (111 ) to generate an oscillating magnetic field.
  • a current and voltage sense circuit (121) senses loading to a receiver coil (211).
  • the controller operates a working state indicator (123), which may be an LED, to inform a user of the state of the power transmitter module.
  • a standby mode and auto start circuit (125) triggers when there is no loading at the receiver coil, and causes the power transmitter module to enter into a low power standby mode; and restores power to the power transmitter module when loading at the receiver coil is detected,
  • a metal object such as a coin, a key
  • the power transmitter module provides for parasitic metal object detection (P OD) (127), which terminates power to the transmitter coil.
  • P OD parasitic metal object detection
  • a PMOD setting circuit may set a threshold level for the PMOD function.
  • the LED receiver module in the embodiment depicted in Fig. 1 includes a receiver coil (211), which is also connected to a resonant circuit (217).
  • a resonant circuit 217
  • an electric current is induced in the receiver coil at a resonant frequency of the resonant circuit, it produces a signal, which can be rectified by a rectifier circuit (213) to produce a DC signal to drive an LED driver circuit (215) to provide power to an LED array (220).
  • a remote control device may be incorporated in the system to remotely operate either or both the power transmitter module and the LED receiver module.
  • the remote control device may be used to turn ON and OFF the power transmitter module, and to dim the LED array.
  • Fig. 2 is a schematic representation of the components of the LED lighting system such as the exemplary embodiment of this invention depicted in Fig. 1.
  • the power transmitter module (110) includes a magnetic element (411) that attracts and aligns the LED receiver module (210) to the power transmitter module (110).
  • the magnet may be attracted to the receiver coil (211).
  • the power transmitter module (110) and the LED receiver module (210) are aligned with respect to their respective transmitter coil (111) and receiver coil (211) to create an inductive circuit in which an electric current in the transmitter coil (111) can electromagnetically induce an electric current in the receiver coil (211).
  • the power transmitter module (310) includes a circuit board (301), which houses the circuitry such as the power transmitter module depicted in Fig. 1.
  • a transmitter coil assembly (303) includes a coil of copper wire (305) that is connected to the circuit board by suitable connectors (307).
  • the transmitter coil (303) assembly includes a magnet (411 ) at the center of the transmitter coil. Other locations may also be possible depending on the layout of the receiver module.
  • a magnetic shield (309) may be placed behind the transmitter coil assembly (303) if necessary to contain the electromagnetic radiation.
  • the LED lighting module (410) includes a circuit board (401), which houses the circuitry such as the LED receiver module depicted in Fig. 1 for the LED lighting system (100).
  • a receiver coil assembly (403) includes a coil of copper wire (405) that is connected to the circuit board by suitable connectors (407). The receiver coil may be formed on a printed circuit board (PCB) if flexibility is desirable.
  • a magnetic shield (409) may be placed at the back of the receiver coil assembly if necessary to contain the electromagnetic radiation.
  • the magnetic shield (309) in the power transmitter module (310) and the magnetic shield (409) in the LED receiver module (410) may be closely aligned to each other in order to provide maximum containment of the electromagnetic radiation generated by the transmitter coil (111) (305).
  • Fig. 5 is a photograph of an exemplary board (501 ) of the power transmitter module.
  • FIG. 6 are photographs of configurations of coils (611) affixed on PCBs.
  • Fig. 7 is a photograph of an exemplary board (711) with array of LEDs affixed on it.
  • the power transmitter module (110, 310) may be installed in a wall (e.g., behind the drywall). Power (e.g., AC) may be wired to the power transmitter module.
  • the LED receiver module (210, 410) may then be place on the drywall near the power transmitter module.
  • the magnet (411) will attract the receiver coil (211, 405) and hold the LED receiver module in position by virtue of the magnetic attraction between the magnet and the receiver coil Therefore, there is no need for conventional fasteners such as screws, nails, brackets, and the like.
  • the power transmitter module (110, 310) When the power transmitter module (110, 310) is powered up, loading in the transmitter coil (111, 305), which is close to the receiver coil (211 , 405), is detected by the current and voltage sense circuit (121 ).
  • the standby mode and auto restart circuit (125) will not disconnect power to the transmitter coil, and power will be transmitted to the LED receiver module (210, 410) to power the LED array (220, 420),
  • the current and voltage sense circuit (121) will detect the change in the loading of the transmitter coil (111, 305).
  • the standby mode and auto restart circuit (125) will then put the power transmitter module in low power standby mode.
  • Both the power transmitter module and the LED receiver module in this embodiment may be housed in insulated enclosures. Safety against electrical shock is greatly improved because there is no metal connection between the two modules.
  • the power transmitter module may be buried in the wall (or ceiling or other surface), so it may be concealed from view, and which provides an ideal solution for a removable lighting without a visible receptacle.
  • the remote control can provide on/off, dimming, and other functions.
  • LED indicators may be provided to indicate various states of operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Description

WIRELESS LED LIGHTING
BRIEF DESCRIPTION OF THE DRAWINGS
[0001] Fig. 1 is a system block diagram according to an embodiment of the invention.
[0002] Fig. 2 is a high level block diagram according to an embodiment of the invention.
[0003] Figs. 3 and 4 are assembly block diagrams according to an
embodiment of the invention.
[0004] Figs. 5-7 are photographs of prototypes according to embodiments of the invention. DETAILED DESCRIPTION
[0005] Fig. 1 is high level circuit diagram of an LED lighting system (100), illustrative of an embodiment in accordance with the invention. It depicts a power transmitter module (110) that provides power to an LED receiver module
(210). The power transmitter module is wirelessly connected to the LED receiver module without the need of any electrically conductive wires between them. The power transmitter module may include a power supply circuit (112) to provide power to circuit components in the power transmitter module. The power supply circuit may receive power from any suitable power source. For example, the power source may be an AC source, which may include an AC to DC converter (114). The power source may be a DC source (e.g., batteries), which may be shifted to a suitable DC level by an DC to DC level shifter (116). The power source may be solar power (118). In some embodiments, a power indicator LED (113) may be provided to inform the user that the power transmitter module is receiving power.
[0006] In the embodiment depicted in Fig. 1 , a controller (115) provides control circuitry and control logic to operate the power transmitter module. A resonant circuit (117) receives power from a half-bridge driver circuit (119) and drives a transmitter coil (111 ) to generate an oscillating magnetic field. A current and voltage sense circuit (121) senses loading to a receiver coil (211). The controller operates a working state indicator (123), which may be an LED, to inform a user of the state of the power transmitter module. A standby mode and auto start circuit (125) triggers when there is no loading at the receiver coil, and causes the power transmitter module to enter into a low power standby mode; and restores power to the power transmitter module when loading at the receiver coil is detected,
[0007] A metal object such as a coin, a key, when placed close to the transmitter coil inadvertently, may heats up due to eddy currents induced by the alternating magnetic field. Accordingly, the power transmitter module provides for parasitic metal object detection (P OD) (127), which terminates power to the transmitter coil. A PMOD setting circuit may set a threshold level for the PMOD function.
[0008] The LED receiver module in the embodiment depicted in Fig. 1 includes a receiver coil (211), which is also connected to a resonant circuit (217). When an electric current is induced in the receiver coil at a resonant frequency of the resonant circuit, it produces a signal, which can be rectified by a rectifier circuit (213) to produce a DC signal to drive an LED driver circuit (215) to provide power to an LED array (220).
[0009] Optionally, a remote control device (310) may be incorporated in the system to remotely operate either or both the power transmitter module and the LED receiver module. For example, the remote control device may be used to turn ON and OFF the power transmitter module, and to dim the LED array.
[0010] Fig. 2 is a schematic representation of the components of the LED lighting system such as the exemplary embodiment of this invention depicted in Fig. 1. The power transmitter module (110) includes a magnetic element (411) that attracts and aligns the LED receiver module (210) to the power transmitter module (110). In some embodiments, the magnet may be attracted to the receiver coil (211).
[0011] The power transmitter module (110) and the LED receiver module (210) are aligned with respect to their respective transmitter coil (111) and receiver coil (211) to create an inductive circuit in which an electric current in the transmitter coil (111) can electromagnetically induce an electric current in the receiver coil (211).
[0012] In the embodiment depicted in Fig. 3, the power transmitter module (310) includes a circuit board (301), which houses the circuitry such as the power transmitter module depicted in Fig. 1. A transmitter coil assembly (303) includes a coil of copper wire (305) that is connected to the circuit board by suitable connectors (307). In the embodiment, the transmitter coil (303) assembly includes a magnet (411 ) at the center of the transmitter coil. Other locations may also be possible depending on the layout of the receiver module. A magnetic shield (309) may be placed behind the transmitter coil assembly (303) if necessary to contain the electromagnetic radiation.
[0013] In the embodiment depicted in Fig. 4, the LED lighting module (410) includes a circuit board (401), which houses the circuitry such as the LED receiver module depicted in Fig. 1 for the LED lighting system (100). A receiver coil assembly (403) includes a coil of copper wire (405) that is connected to the circuit board by suitable connectors (407). The receiver coil may be formed on a printed circuit board (PCB) if flexibility is desirable. A magnetic shield (409) may be placed at the back of the receiver coil assembly if necessary to contain the electromagnetic radiation.
[0014] The magnetic shield (309) in the power transmitter module (310) and the magnetic shield (409) in the LED receiver module (410) may be closely aligned to each other in order to provide maximum containment of the electromagnetic radiation generated by the transmitter coil (111) (305).
[0015] Fig. 5 is a photograph of an exemplary board (501 ) of the power transmitter module.
[0016] Fig. 6 are photographs of configurations of coils (611) affixed on PCBs.
[0017] Fig. 7 is a photograph of an exemplary board (711) with array of LEDs affixed on it.
[0018] In a typical usage scenario, the power transmitter module (110, 310) may be installed in a wall (e.g., behind the drywall). Power (e.g., AC) may be wired to the power transmitter module. The LED receiver module (210, 410) may then be place on the drywall near the power transmitter module. The magnet (411) will attract the receiver coil (211, 405) and hold the LED receiver module in position by virtue of the magnetic attraction between the magnet and the receiver coil Therefore, there is no need for conventional fasteners such as screws, nails, brackets, and the like.
[0019] When the power transmitter module (110, 310) is powered up, loading in the transmitter coil (111, 305), which is close to the receiver coil (211 , 405), is detected by the current and voltage sense circuit (121 ). The standby mode and auto restart circuit (125) will not disconnect power to the transmitter coil, and power will be transmitted to the LED receiver module (210, 410) to power the LED array (220, 420), When the user removes the LED receiver module (210, 410), the current and voltage sense circuit (121) will detect the change in the loading of the transmitter coil (111, 305). The standby mode and auto restart circuit (125) will then put the power transmitter module in low power standby mode.
[0020] Both the power transmitter module and the LED receiver module in this embodiment may be housed in insulated enclosures. Safety against electrical shock is greatly improved because there is no metal connection between the two modules. The power transmitter module may be buried in the wall (or ceiling or other surface), so it may be concealed from view, and which provides an ideal solution for a removable lighting without a visible receptacle.
[0021] The remote control can provide on/off, dimming, and other functions.
[0022] LED indicators may be provided to indicate various states of operation.

Claims

WHAT IS CLAIMED IS: 1. An light emitting diode (LED) lighting system, comprising a power transmitter module, a LED receiver module, and in which the power transmitter module is operable to transmit power to the LED receiver module wirelessly without having a wire connecting the power transmitter module and the LED receiver module.
2. The system of claim 1 , in which the power transmitter includes a transmit coil operable to produce an electromagnetic field, and a magnet.
3. The system of claim 2, in which the LED receiver module includes a receive coil, and is capable of being securely held in position proximate to the power transmitter module by a magnetic force.
4. The system of claim 3, in which the LED module is spaced apart from the power transmitter module while it is securely held in position proximate to the power transmitter module.
5. The module of claim 3, in which the power transmitter includes a magnetic shield disposed on one side of the transmit coil, wherein the LED receiver module includes a magnetic shield disposed on one side of the receiver coil, and when the LED receiver module is held in position proximate to the power transmitter, the two magnetic shields are operable in containing the electromagnetic radiation generated at the transmit coil.
PCT/US2013/055771 2012-08-21 2013-08-20 Wireless led lighting Ceased WO2014031627A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261691700P 2012-08-21 2012-08-21
US61/691,700 2012-08-21

Publications (1)

Publication Number Publication Date
WO2014031627A1 true WO2014031627A1 (en) 2014-02-27

Family

ID=50150345

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/055771 Ceased WO2014031627A1 (en) 2012-08-21 2013-08-20 Wireless led lighting

Country Status (1)

Country Link
WO (1) WO2014031627A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9783102B2 (en) 2015-01-13 2017-10-10 Ford Global Technologies, Llc Inductively coupled bin light
WO2018004885A1 (en) * 2016-06-29 2018-01-04 Qualcomm Incorporated Methods and apparatus for wirelessly powered lighting

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090140835A1 (en) * 2007-12-03 2009-06-04 Tung-Hsin You LED lamp control apparatus
KR100928439B1 (en) * 2008-12-12 2009-11-24 정춘길 Solid-state power charging station with a flat spiral core power transformer PC core
JP2011114885A (en) * 2009-11-24 2011-06-09 Panasonic Electric Works Co Ltd Non-contact power transmission apparatus
JP2012044840A (en) * 2010-08-23 2012-03-01 Tdk Corp Coil device and non-contact power transmission device
JP2012143117A (en) * 2011-01-06 2012-07-26 Toyota Industries Corp Non-contact power transmission device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090140835A1 (en) * 2007-12-03 2009-06-04 Tung-Hsin You LED lamp control apparatus
KR100928439B1 (en) * 2008-12-12 2009-11-24 정춘길 Solid-state power charging station with a flat spiral core power transformer PC core
JP2011114885A (en) * 2009-11-24 2011-06-09 Panasonic Electric Works Co Ltd Non-contact power transmission apparatus
JP2012044840A (en) * 2010-08-23 2012-03-01 Tdk Corp Coil device and non-contact power transmission device
JP2012143117A (en) * 2011-01-06 2012-07-26 Toyota Industries Corp Non-contact power transmission device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9783102B2 (en) 2015-01-13 2017-10-10 Ford Global Technologies, Llc Inductively coupled bin light
WO2018004885A1 (en) * 2016-06-29 2018-01-04 Qualcomm Incorporated Methods and apparatus for wirelessly powered lighting

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