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WO2015015356A1 - Procédés, appareil et système pour un éclairage auto-alimenté - Google Patents

Procédés, appareil et système pour un éclairage auto-alimenté Download PDF

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Publication number
WO2015015356A1
WO2015015356A1 PCT/IB2014/063139 IB2014063139W WO2015015356A1 WO 2015015356 A1 WO2015015356 A1 WO 2015015356A1 IB 2014063139 W IB2014063139 W IB 2014063139W WO 2015015356 A1 WO2015015356 A1 WO 2015015356A1
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WO
WIPO (PCT)
Prior art keywords
energy
rechargeable battery
self
powered
lighting system
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/IB2014/063139
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English (en)
Inventor
Liang Jia
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
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 Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of WO2015015356A1 publication Critical patent/WO2015015356A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
    • 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
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
    • 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
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/28—Circuit arrangements for protecting against abnormal temperature
    • 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]
    • H05B45/20—Controlling the colour of the light
    • 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
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present invention is directed generally to methods, apparatus and systems for self-powered lighting. More particularly, various inventive methods, systems and apparatus disclosed herein relate to harvesting kinetic energy captured from moving water associated with a water provision appliance, for storage as electrical energy and/or use in powering one or more light sources, sensors and/or dispensers.
  • Various household or workplace apparatus such as light sources (e.g., bathroom lights, night lights), water/soap dispensers, etc., may be powered using electrical energy obtained from an alternating current (AC) mains, directly or through a battery. Either way, the electrical energy must be replenished, e.g., by burning fossil fuels to create more electrical energy. Many of these apparatus may require only a small amount of energy to operate.
  • digital lighting technologies i.e. illumination based on semiconductor light sources, such as light-emitting diodes (LEDs)
  • LEDs light-emitting diodes
  • Functional advantages and benefits of LEDs include high energy conversion and optical efficiency, durability, lower operating costs, and many others.
  • An LED- based light source may produce the same amount of light as a conventional light source, such as an incandescent light source, while consuming a fraction of the energy.
  • the present disclosure is directed to inventive systems, methods and apparatus for self-powered lighting.
  • kinetic energy from moving water associated with an everyday water provision appliance may be harvested for storage in a rechargeable battery and/or for use in powering one or more light sources, sensors, and/or dispensers.
  • a self-powered light-emitting diode (LED) lighting system may include a generator configured to capture kinetic energy from moving water associated with a water provision appliance for storage as electrical energy in a rechargeable battery, a sensor powered at least in part by electrical energy stored in the rechargeable battery and configured to provide a presence signal in response to detection of a person's presence near the water provision appliance, and a power conversion circuit configured to use electrical energy stored in the rechargeable battery to selectively illuminate one or more LEDs near the water provision appliance based on the presence signal.
  • a generator configured to capture kinetic energy from moving water associated with a water provision appliance for storage as electrical energy in a rechargeable battery
  • a sensor powered at least in part by electrical energy stored in the rechargeable battery and configured to provide a presence signal in response to detection of a person's presence near the water provision appliance
  • a power conversion circuit configured to use electrical energy stored in the rechargeable battery to selectively illuminate one or more LEDs near the water provision appliance based on the presence signal.
  • the generator may be configured to capture the kinetic energy as AC energy
  • the self-powered LED lighting system may further include an energy- harvesting circuit configured to convert the AC energy into DC energy for storage in the rechargeable battery.
  • the rechargeable battery may be a lithium-ion battery (LIB).
  • the energy-harvesting circuit may be further configured to convert supplemental AC energy received from AC mains into DC energy for storage in the rechargeable battery.
  • the self-powered LED lighting system may include a low battery sensor powered at least in part by electrical energy stored in the rechargeable battery and configured to provide a low battery signal in response to a determination that the rechargeable battery has less than a predetermined amount of stored electrical energy.
  • the energy- harvesting circuit may be configured to convert the AC energy captured by the generator and/or the supplemental AC energy received from AC mains into DC energy for storage in the rechargeable battery in response to the low battery signal.
  • the energy- harvesting circuit may be configured to convert supplemental AC energy received from AC mains into DC energy for use in illuminating the one or more LEDs.
  • the power conversion circuit may include a DC-to-DC step down convertor.
  • the self-powered LED lighting system may include an infrared sensor powered at least in part by electrical energy stored in the rechargeable battery and configured to provide an appendage presence signal in response to detection of an appendage of the person.
  • the water provision appliance may be configured to dispense water in response to the appendage presence signal.
  • a soap dispenser may be operably coupled with the infrared sensor and configured to dispense soap in response to the appendage presence signal.
  • the self-powered LED lighting system may include a thermal sensor powered at least in part by electrical energy stored in the rechargeable battery and configured to provide a warning signal in response to detecting a temperature of one or more components of self-powered LED lighting system that is outside of an acceptable temperature range.
  • the self-powered LED lighting system may include a photocell powered at least in part by electrical energy stored in the rechargeable battery and configured to measure light near the water provision appliance and provide a light
  • a method of operating a self-powered lighting system may include capturing kinetic energy from moving water associated with a water provision appliance, storing the captured kinetic energy as electrical energy in a rechargeable battery, powering a presence sensor with electrical energy stored in the rechargeable battery, and utilizing electrical energy stored in the rechargeable battery to selectively illuminate one or more LEDs near the water provision appliance in response to detection by the presence sensor of a person's presence near the water provision appliance.
  • the capturing may include capturing the kinetic energy as AC energy, and the method may further include converting the AC energy into DC energy for storage in the rechargeable battery.
  • the method may further include converting supplemental AC energy received from AC mains into DC energy for storage in the rechargeable battery.
  • the method may further include powering a low battery sensor at least in part using electrical energy stored in the rechargeable battery, and providing, by the low battery sensor, a low battery signal in response to a determination that the rechargeable battery has less than a predetermined amount of stored electrical energy.
  • the converting may include converting the supplemental AC energy received from AC mains into DC energy for storage in the rechargeable battery in response to the low battery signal.
  • the method may include converting supplemental AC energy received from AC mains into DC energy for use in illuminating the one or more LEDs.
  • the method may include powering an infrared sensor at least in part with electrical energy stored in the rechargeable battery, and providing, by the infrared sensor, an appendage presence signal in response to detection of an appendage of the person.
  • the method may further include dispensing water in response to the appendage presence signal.
  • the method may further include causing a soap dispenser to dispense soap in response to the appendage presence signal.
  • the method may further include powering a thermal sensor at least in part with electrical energy stored in the rechargeable battery, and providing, by the thermal sensor, a warning signal in response to detecting a temperature of one or more components of self-powered lighting system that lies outside of an acceptable temperature range.
  • the method may further include powering a photocell at least in part with electrical energy stored in the rechargeable battery, measuring, by the photocell, light near the water provision appliance, and providing, by the photocell based on the measured light, a light measurement signal to the power conversion circuit to control the illumination of the one or more LEDs.
  • a self-powered lighting system may include a generator configured to capture AC energy from moving water associated with a water provision appliance, an energy-harvesting circuit configured to convert the captured AC energy into DC energy to charge the rechargeable battery, and a power conversion circuit configured to use electrical energy stored in the rechargeable battery to selectively illuminate one or more light sources near the water provision appliance based on one or more signals from one or more sensors.
  • the one or more sensors may be powered at least in part by electrical energy stored in the rechargeable battery.
  • the one or more sensors may include a presence sensor configured to provide a presence signal in response to detection of a person's presence near the water provision appliance.
  • the power conversion circuit may illuminate the one or more light sources in response to the presence signal.
  • the one or more sensors may include an infrared sensor configured to provide an appendage present signal in response to detection of a person's appendage
  • the self-powered lighting system may include a dispenser that dispenses water, soap, a towel or blown air in response to the appendage present signal.
  • the one or more sensors may include a thermal sensor configured to provide a warning signal in response to a determination that a temperature of the generator falls outside of an acceptable temperature range.
  • the one or more sensors may include a low battery sensor configured to provide a low battery signal in response to a determination that the rechargeable battery has less than a predetermined amount of stored energy.
  • the term "LED” should be understood to include any electroluminescent diode or other type of carrier injection/junction- based system that is capable of generating radiation in response to an electric signal.
  • the term LED includes, but is not limited to, various semiconductor-based structures that emit light in response to current, light emitting polymers, organic light emitting diodes (OLEDs), electroluminescent strips, and the like.
  • LED refers to light emitting diodes of all types (including semi-conductor and organic light emitting diodes) that may be configured to generate radiation in one or more of the infrared spectrum, ultraviolet spectrum, and various portions of the visible spectrum (generally including radiation wavelengths from approximately 400 nanometers to approximately 700 nanometers).
  • an LED configured to generate essentially white light may include a number of dies which respectively emit different spectra of electroluminescence that, in combination, mix to form essentially white light.
  • a white light LED may be associated with a phosphor material that converts electroluminescence having a first spectrum to a different second spectrum.
  • electroluminescence having a relatively short wavelength and narrow bandwidth spectrum "pumps" the phosphor material, which in turn radiates longer wavelength radiation having a somewhat broader spectrum.
  • an LED does not limit the physical and/or electrical package type of an LED.
  • an LED may refer to a single light emitting device having multiple dies that are configured to respectively emit different spectra of radiation (e.g., that may or may not be individually controllable).
  • an LED may be associated with a phosphor that is considered as an integral part of the LED (e.g., some types of white LEDs).
  • the term LED may refer to packaged LEDs, non-packaged LEDs, surface mount LEDs, chip-on-board LEDs, T-package mount LEDs, radial package LEDs, power package LEDs, LEDs including some type of encasement and/or optical element (e.g., a diffusing lens), etc.
  • light source should be understood to refer to any one or more of a variety of radiation sources, including, but not limited to, LED-based sources including one or more LEDs as defined above.
  • a given light source may be configured to generate electromagnetic radiation within the visible spectrum, outside the visible spectrum, or a combination of both.
  • a light source may include as an integral component one or more filters (e.g., color filters), lenses, or other optical components.
  • filters e.g., color filters
  • lenses e.g., prisms
  • light sources may be configured for a variety of applications, including, but not limited to, indication, display, and/or illumination.
  • illumination source is a light source that is particularly configured to generate radiation having a sufficient intensity to effectively illuminate an interior or exterior space.
  • sufficient intensity refers to sufficient radiant power in the visible spectrum generated in the space or environment (the unit “lumens” often is employed to represent the total light output from a light source in all directions, in terms of radiant power or "luminous flux”) to provide ambient illumination (i.e., light that may be perceived indirectly and that may be, for example, reflected off of one or more of a variety of intervening surfaces before being perceived in whole or in part).
  • the term "lighting fixture” is used herein to refer to an implementation or arrangement of one or more lighting units in a particular form factor, assembly, or package.
  • the term “lighting unit” is used herein to refer to an apparatus including one or more light sources of same or different types.
  • a given lighting unit may have any one of a variety of mounting arrangements for the light source(s), enclosure/housing arrangements and shapes, and/or electrical and mechanical connection configurations. Additionally, a given lighting unit optionally may be associated with (e.g., include, be coupled to and/or packaged together with) various other components (e.g., control circuitry) relating to the operation of the light source(s).
  • LED-based lighting unit refers to a lighting unit that includes one or more LED- based light sources as discussed above, alone or in combination with other non LED-based light sources.
  • a “multi-channel” lighting unit refers to an LED-based or non LED-based lighting unit that includes at least two light sources configured to respectively generate different spectrums of radiation, wherein each different source spectrum may be referred to as a "channel" of the multi-channel lighting unit.
  • controller is used herein generally to describe various apparatus relating to the operation of one or more light sources.
  • a controller can be implemented in numerous ways (e.g., such as with dedicated hardware) to perform various functions discussed herein.
  • a "processor” is one example of a controller which employs one or more microprocessors that may be programmed using software (e.g., microcode) to perform various functions discussed herein.
  • a controller may be implemented with or without employing a processor, and also may be implemented as a combination of dedicated hardware to perform some functions and a processor (e.g., one or more programmed microprocessors and associated circuitry) to perform other functions. Examples of controller components that may be employed in various embodiments of the present disclosure include, but are not limited to, conventional microprocessors, application specific integrated circuits (ASICs), and field-programmable gate arrays (FPGAs).
  • ASICs application specific integrated circuits
  • FPGAs field-programmable gate arrays
  • user interface refers to an interface between a human user or operator and one or more devices that enables communication between the user and the device(s).
  • user interfaces that may be employed in various implementations of the present disclosure include, but are not limited to, switches, potentiometers, buttons, dials, sliders, a mouse, keyboard, keypad, various types of game controllers (e.g., joysticks), track balls, display screens, various types of graphical user interfaces (GUIs), touch screens, microphones and other types of sensors that may receive some form of human-generated stimulus and generate a signal in response thereto.
  • game controllers e.g., joysticks
  • GUIs graphical user interfaces
  • water provision appliance may refer to various appliances configured to provide water for consumption, e.g., by humans, and may often be found in bathrooms, among other places.
  • Examples of water provision appliances that may be found in bathrooms include but are not limited to sinks, showers, bathtubs, Bidets, and so forth.
  • Examples of water provision appliances that may be found elsewhere include but are not limited to sinks (e.g., kitchen sinks), water fountains, dishwashers, clothes washers, hoses, spigots, well pumps, water features (e.g., decorative fountains), and so forth.
  • FIG. 1 schematically illustrates an example self-powered lighting system, in accordance with various embodiments.
  • FIG. 2 schematically illustrates example energy-harvesting and power conversion circuits that may be employed in a self-powered lighting system, in accordance with various embodiments.
  • FIG. 3 schematically illustrates an example method that may be implanted by a self- powered lighting system, in accordance with various embodiments.
  • Applicant has recognized and appreciated that it would be beneficial to harvest an untapped source of kinetic energy - moving water associated with various water provision appliances - without requiring the kinetic energy's source to perform any additional work or consume any extra resources.
  • various embodiments and implementations of the present invention are directed to harvesting kinetic energy from moving water associated with a water provision appliance for storage as electrical energy in a battery, as well as for use in powering various sensors, selectively illuminating one or more light sources and/or selectively operating one or more dispensers.
  • a self-powered LED lighting system 100 may include a water provision appliance 102. While water provision appliance 102 may be any of the sources of moving water described in the Summary, in many of the examples described herein, water provision appliance 102 will be a bathroom sink.
  • a generator 104 may be configured to capture kinetic energy from water moving through water provision appliance 102.
  • Generator 104 may come in various forms, and may capture water in various ways and at various locations of a water provision appliance 102.
  • generator 104 may be employed at one or more locations of water provision appliance 102 with the greatest pressure and/or most consistent water flow.
  • generator 104 may be mounted near the mouth of a bathroom sink's faucet, at or near a joint of a pipe underneath the sink, at an input or output of a pipe end/branch, and so forth.
  • kinetic energy captured by generator 104 may be harvested, e.g., by an energy-harvesting circuit 106, for storage as electrical energy in a rechargeable battery 108.
  • energy-harvesting circuit 106 may convert unstable AC energy harvested from generator 104 into constant DC voltage (e.g., 12V) for charging rechargeable battery 108.
  • Rechargeable battery 108 may come in various forms, including but not limited to a lithium-ion battery. Assuming the average person uses seventy gallons of water a day, along with an assumed household water pressure of 35 PSI and an assumed flow rate of ten gallons per minute, 90W of energy could be produced. This may be enough energy to power, for instance, a 10W light source with 900 lumens of output, and/or a 10W lighting system for nine hours, with light sources of the lighting system being illuminated for 3-7 hours of that time.
  • electrical energy stored in rechargeable battery 108 may be harnessed, e.g., by a power conversion circuit 110, to selectively illuminate one or more LEDs 112, to power one or more sensors 114, and/or to selectively operate one or more dispensers.
  • Energy-harvesting circuit 106 and power conversion circuit 110 will be described in more detail below.
  • one or more LEDs 112 may include one or more 10W LEDs, such as a night light or other low power light sources.
  • various sensors 114 may be configured to sense various phenomena and provide corresponding signals.
  • a presence sensor 116 may be configured to detect the presence of a person at various locations, such as near water provision appliance 102 (e.g., in a bathroom), and to provide a responsive presence signal.
  • Self-powered LED lighting system 100 may be configured, e.g., by way of power conversion circuit 110, to respond accordingly, e.g., by illuminating one or more LEDs 112.
  • various sensors 114 may be powered at least in part by electrical energy stored in rechargeable battery 108.
  • sensors may be included in self-powered LED lighting system 100 and powered at least in part by electrical energy stored in rechargeable battery 108.
  • An infrared sensor 118 may be configured to provide an appendage presence signal in response to detection of an appendage of the person. This signal may be used for various purposes.
  • water provision appliance 102 may be configured to supply water in response to the appendage presence signal. For example, infrared sensor 118 may detect a set of hands below a faucet, causing it to provide the appendage presence sensor. In response, water provision appliance 102 may cause water to flow through the faucet.
  • a soap dispenser may be operably coupled with infrared sensor 118, and may be configured to dispense soap in response to the appendage presence signal.
  • a towel dispenser may be operably coupled with infrared sensor 118, and may be configured to automatically dispense one or more towels in response to the appendage presence signal.
  • an air dryer may be operably coupled with infrared sensor 118, and may be configured to automatically blow air in response to the appendage presence signal.
  • self-powered LED lighting system 100 may include a photocell 120 configured to measure light at or near the water provision appliance and provide a light measurement signal, e.g., to power conversion circuit 110, to control the illumination of one or more LEDs 112.
  • self-powered LED lighting system 100 e.g., by way of power conversion circuit 110, may alter one or more lighting properties (e.g., hue, saturation, brightness, temperature, intensity, etc.) of light emitted by one or more LEDs 112 based on the light measurement signal provided by photocell 120.
  • self-powered LED lighting system 100 may include a thermal sensor 122.
  • Thermal sensor 122 may come in various forms, such as a thermometer, and may be configured to monitor one or more components of self-powered LED lighting system 100 and provide a warning signal on detection of a temperature outside of an acceptable temperature range.
  • thermal sensor 122 may monitor a temperature of generator 104, and may provide the warning signal to cause disengagement or other preservation of generator 104, e.g., in the event that the water movement becomes too strong (e.g., to prevent overheating) or that the water temperature is too cold (e.g., to prevent freezing).
  • self-powered LED lighting system 100 may include a low battery sensor 124.
  • Low battery sensor 124 may be configured to provide a low battery signal, e.g., to power conversion circuit 110 and/or energy-harvesting circuit 106, in response to a determination that rechargeable battery 108 has less than a predetermined amount of stored electrical energy.
  • self-powered LED lighting system 100 e.g., by way of energy-harvesting circuit 106 and/or power conversion circuit 110, may replenish energy in rechargeable battery 108.
  • energy- harvesting circuit 106 and/or power conversion circuit 110 may harvesting energy from generator 104, or if generator 104 is inoperable or otherwise not able to capture sufficient energy, from an AC mains 126.
  • One or more of various sensors 114 need not be located at or near water provision appliance 102.
  • presence sensor 116 may be placed elsewhere, such as at the doorway of a child's bedroom. When the child gets up in the middle of the night to use the bathroom, presence sensor 116 may detect the child passing through the bedroom doorway and may provide the presence signal.
  • Self-powered LED lighting system 100 e.g., by way of power conversion circuit 110, may illuminate one or more LEDs 112 located in the bathroom so that the child is able to see when she arrives.
  • switches 128 associated with various other components of self-powered LED lighting system 100.
  • one or more of switches 128 may be coupled or integrated with water provision appliance 102 and may be operable to cause water provision appliance 102 to dispense water, e.g., in response to an appendage present signal raised by infrared sensor 118.
  • Another of switches 128 may be coupled or integrated with generator 104 and may be operable to cause generator 104 to turn off, e.g., in response to a warning signal raised by thermal sensor 122.
  • switches 128 may be coupled or integrated with energy-harvesting circuit 106, and may be operable to cause energy-harvesting circuit 106 to harvest energy from generator 104 and/or AC mains 126 for storage in rechargeable battery 108, e.g., in response to a low battery signal from low battery sensor 124. Yet another of switches 128 may be coupled or integrated with power conversion circuit 110, and may be operable to cause power conversion circuit 110 to selectively illuminate one or more LEDs, e.g., based on a light measurement signal from photocell 120.
  • energy-harvesting circuit 106 may be configured to capture AC energy from various sources and convert it into direct current (DC) energy, e.g., 12VDC, for storage in rechargeable battery 108.
  • energy-harvesting circuit 106 may be configured to convert supplemental AC energy received from an AC mains 126 into DC energy for powering one or more LEDs 112, or for storage in rechargeable battery 108, e.g., in response to a low battery signal from low battery sensor 124.
  • Fig. 2 depicts components of an example energy-harvesting circuit 106, in accordance with various embodiments.
  • Other circuit structures/topologies such as a Flyback converter, may be used in addition to or instead of the configuration shown in Fig. 2.
  • N may be a source of rectified voltage, e.g., from generator 104 and/or from AC mains 126, for use when battery 108 lacks sufficient power.
  • a first electrolytic capacitor 230 may be configured to filter out AC components and/or to decouple input and output of energy-harvesting circuit 106.
  • a main switch 232 may be controlled with a pulse width modulated (PWM) control signal, e.g., received through V G s, at a relatively high frequency (also referred to as "duty cycle"), e.g., to achieve compact size and to avoid audible noise.
  • PWM pulse width modulated
  • main switch 232 When main switch 232 is closed, or "on,” energy from V
  • transformer 234 may provide isolation between high voltage input such as from AC mains 126 and the load (e.g., one or more LEDs 112).
  • a first resister 238, a first regular capacitor 240, and a first diode 242 may together form a snubber circuit configured to protect main switch 232, e.g., from damage due to voltage spikes.
  • a second diode 246 and second electrolytic capacitor 236 may together form an output circuit to charge battery 108.
  • power conversion circuit 110 may be configured to use electrical energy stored in rechargeable battery 108 to power various sensors 114 and/or to selectively illuminate one or more LEDs 112, e.g., based on the a signal from presence sensor 116.
  • power conversion circuit 110 may include one or more convertors, e.g., to charge rechargeable battery 108, as well as one or more linear regulators, e.g., to control energy supplied to sensors 114.
  • power conversion circuit 110 may be a DC-to-DC step down convertor (e.g., a buck converter) or other type of output filter.
  • Fig. 2 depicts an example of a power conversion circuit 110 inductively coupled with energy-harvesting circuit 106 via transformer 234.
  • a third electrolytic capacitor 248 may operate as an input capacitor downstream from battery 108.
  • a PWM duty cycle of a second switch 250 may be selected to control current/voltage, e.g., from battery 108, that is used to illuminate one or more LEDs 112.
  • a third diode 252 may operate as a freewheeling diode for second switch 250, such that second switch 250, third diode 252 and an inductor 254 may operate as a buck convertor.
  • Inductor 254 and a fourth electrolytic capacitor 256 together may form an LC filter for one or more LEDs 112.
  • One or more LEDs 112 may be designed for operation at 9V and their maximum current may be 530 milliamps. In such case, one or more LEDs 112 may be three LEDs in series. In such case, the total power consumption may be 4.8W, and the lumen output may be greater than 500 lumens.
  • Fig. 3 depicts an example method 300 that may be implemented by self-powered LED lighting system 100, in accordance with various embodiments.
  • kinetic energy from moving water may be captured, e.g., by generator 104.
  • the captured kinetic energy may be stored, e.g., by energy-harvesting circuit 106 and/or power conversion circuit 110, in rechargeable battery 108.
  • one or more sensors 114 may be powered, e.g., by power conversion circuit 110, at least in part using electrical energy from rechargeable battery 108.
  • signals from the various signals may be awaited, e.g., by device switch component 128.
  • method 300 may proceed to block 312, where a light measurement signal may be obtained, e.g., from photocell 120. Based on the obtained light measurement signal, at block 314, one or more LEDs 112 may be selectively illuminated, e.g., by power conversion circuit 110. If at block 316, a set amount of time (e.g., five minutes) has not elapsed, then method 300 may proceed back to block 314, and one or more LEDs 112 may continue to be illuminated.
  • a set amount of time e.g., five minutes
  • method 300 may proceed to block 320.
  • method 300 may proceed to block 322, and rechargeable battery 108 may be replenished and/or supplemented, e.g., using AC power from generator 104 and/or AC mains 126. Method 300 may then proceed back to block 308.
  • method 300 may proceed to block 324.
  • method 300 may proceed to block 326.
  • water may be dispensed, e.g., from a faucet or tap, soap may be dispensed from a soap dispenser, one or more towels may be dispensed from a towel dispenser, and/or an air dryer may be activated. Method 300 may then proceed back to block 308.
  • method 300 may proceed to block 328.
  • method 300 may proceed to block 330.
  • inventive embodiments are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, inventive embodiments may be practiced otherwise than as specifically described and claimed.
  • inventive embodiments of the present disclosure are directed to each individual feature, system, article, material, kit, and/or method described herein.

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

Abstract

La présente invention concerne différents systèmes de récolte d'énergie et/ou d'éclairage auto-alimenté. Dans différents modes de réalisation, un générateur peut être configuré pour capturer de l'énergie cinétique provenant de l'eau se déplaçant à travers la plomberie d'un appareil d'alimentation en eau pour un stockage sous la forme d'énergie électrique dans une batterie rechargeable. Un capteur peut être alimenté au moins en partie par de l'énergie électrique stockée dans la batterie rechargeable, et peut être configuré pour fournir un signal de présence en réponse à la détection de la présence d'une personne près de l'appareil d'alimentation en eau. Un circuit de conversion d'énergie peut être configuré pour utiliser l'énergie électrique stockée dans la batterie rechargeable afin d'éclairer de manière sélective une ou plusieurs diodes électroluminescentes (DEL) près de l'appareil d'alimentation en eau sur la base du signal de présence.
PCT/IB2014/063139 2013-08-01 2014-07-16 Procédés, appareil et système pour un éclairage auto-alimenté Ceased WO2015015356A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017190999A1 (fr) 2016-05-03 2017-11-09 Philips Lighting Holding B.V. Procédé et commutateur de commande
GB2558674A (en) * 2017-01-10 2018-07-18 Tridonic Gmbh & Co Kg Apparatus for operating one or more lighting devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003003535A (ja) * 2001-06-22 2003-01-08 Toto Ltd 発電機付き自動水栓
US20040258567A1 (en) * 2003-06-19 2004-12-23 Kokin Daniel E. Device and method for monitoring and illuminating a fluid
JP2005127232A (ja) * 2003-10-24 2005-05-19 Systec:Kk 水力発電自己照明補助装置
JP2010229748A (ja) * 2009-03-27 2010-10-14 Toto Ltd 自動水栓
WO2010133814A1 (fr) * 2009-05-19 2010-11-25 Michael Graham Reid Production d'électricité à partir d'un système de chauffage à l'aide d'un générateur thermoélectrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003003535A (ja) * 2001-06-22 2003-01-08 Toto Ltd 発電機付き自動水栓
US20040258567A1 (en) * 2003-06-19 2004-12-23 Kokin Daniel E. Device and method for monitoring and illuminating a fluid
JP2005127232A (ja) * 2003-10-24 2005-05-19 Systec:Kk 水力発電自己照明補助装置
JP2010229748A (ja) * 2009-03-27 2010-10-14 Toto Ltd 自動水栓
WO2010133814A1 (fr) * 2009-05-19 2010-11-25 Michael Graham Reid Production d'électricité à partir d'un système de chauffage à l'aide d'un générateur thermoélectrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017190999A1 (fr) 2016-05-03 2017-11-09 Philips Lighting Holding B.V. Procédé et commutateur de commande
GB2558674A (en) * 2017-01-10 2018-07-18 Tridonic Gmbh & Co Kg Apparatus for operating one or more lighting devices
GB2558674B (en) * 2017-01-10 2022-01-19 Tridonic Gmbh & Co Kg Apparatus for operating one or more lighting devices

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