WO2009044354A2 - Dispositif de détection de lumière destiné à informer un dispositif générateur de lumière - Google Patents

Dispositif de détection de lumière destiné à informer un dispositif générateur de lumière Download PDF

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Publication number
WO2009044354A2
WO2009044354A2 PCT/IB2008/053998 IB2008053998W WO2009044354A2 WO 2009044354 A2 WO2009044354 A2 WO 2009044354A2 IB 2008053998 W IB2008053998 W IB 2008053998W WO 2009044354 A2 WO2009044354 A2 WO 2009044354A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
information
generating
devices
sensing
Prior art date
Application number
PCT/IB2008/053998
Other languages
English (en)
Other versions
WO2009044354A3 (fr
Inventor
Achim Hilgers
Bernd Ackermann
Original Assignee
Philips Intellectual Property & Standards Gmbh
Koninklijke Philips Electronics N. V.
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 Philips Intellectual Property & Standards Gmbh, Koninklijke Philips Electronics N. V. filed Critical Philips Intellectual Property & Standards Gmbh
Publication of WO2009044354A2 publication Critical patent/WO2009044354A2/fr
Publication of WO2009044354A3 publication Critical patent/WO2009044354A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/02—Automatically-operated arrangements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/10—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void
    • G01J1/20—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle
    • G01J1/28—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source
    • G01J1/30—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors
    • G01J1/32—Photometry, e.g. photographic exposure meter by comparison with reference light or electric value provisionally void intensity of the measured or reference value being varied to equalise their effects at the detectors, e.g. by varying incidence angle using variation of intensity or distance of source using electric radiation detectors adapted for automatic variation of the measured or reference value
    • 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
    • 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
    • H05B45/22—Controlling the colour of the light using optical feedback
    • 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
    • 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
    • H05B47/195—Controlling the light source by remote control via wireless transmission the transmission using visible or infrared light

Definitions

  • the invention relates to a first device for transmitting information to a second device, to a second device for receiving the information from the first device, and to a method.
  • Examples of such a first device are light-sensing devices, and examples of such a second device are light-generating devices.
  • US 2007 / 0045524 discloses in its title a solid state lighting and discloses in its Figure 3 a light-generating device with light emitting diodes and a light-sensing device with sensors. These devices are coupled to each other via a wire.
  • Objects of the invention are to provide improved first and second devices and to provide an improved method.
  • a first device is defined for transmitting information to a second device, the first device comprising
  • a sensor for sensing light originating from a light source of the second device and for generating a sensing result
  • a transmitter for wirelessly transmitting the information to a receiver of the second device.
  • an improved first device By sensing the light originating from the light source of the second device, by generating the sensing result, by generating the information in response to the sensing result, and by wirelessly transmitting the information to the second device, an improved first device has been created that is more flexible owing to the fact that a wired connection between the first and second devices is avoided.
  • the sensor may be a photo diode or another kind of sensor.
  • the generator may be a signal converter or another kind of generator.
  • the transmitter may be an infrared transmitter or a radio transmitter or another kind of wireless transmitter.
  • the first device is defined in being a self- powered device.
  • Such a self-powered device for example comprises a battery and does not need to be connected to an external power supply, which increases the flexibility.
  • the first device is defined in further comprising
  • Such a converter for example comprises a solar cell, to avoid a battery.
  • a battery such as a relatively small battery or a capacitor such as a relatively large capacitor may be used to bridge interruptions in the light such as relatively short interruptions in the light and/or may be used to compensate for low light levels such as insufficient light levels in e.g. one or more dimming modes.
  • the first device is defined in the information comprising an announcement for informing a controller of the second device.
  • the control of the driver is done in the second device.
  • the first device is defined in the generator comprising a controller for providing the information with an instruction for instructing a driver of the second device. In this case, the control of the driver is done in the first device.
  • a second device is defined for receiving the information from the first device as defined above, the second device comprising
  • the light source may be any kind of light source.
  • the driver may be an electronic driver or another kind of driver.
  • the receiver may be an infrared receiver or a radio receiver or another kind of wireless receiver.
  • the second device is defined in further comprising
  • controller for controlling the driver, the information comprising an announcement for informing the controller.
  • the controller may be a micro processor or another kind of controller.
  • the second device is defined in the information comprising an instruction for instructing the driver.
  • the second device is defined in the light source comprising one or more light emitting diodes.
  • a method for transmitting information from a first device to a second device comprising the steps of - at the second device, driving a light source for generating light,
  • the second device wirelessly receiving the information from the first device for adapting the driving of the light source.
  • Embodiments of the method correspond with the embodiments of the first and second devices.
  • An insight might be that wired couplings are relatively inflexible.
  • a basic idea might be that the first and second devices are to be coupled wirelessly.
  • Fig. 1 shows diagrammatically a first embodiment of first and second devices according to the invention
  • Fig. 2 shows diagrammatically a second embodiment of first and second devices according to the invention.
  • a first (light-sensing) device 1 comprising a sensor 11 such as a photo diode for sensing light 3 originating from a second (light-generating) device 2 and for generating a sensing result.
  • the first device 1 further comprises a generator 12 coupled to the sensor 11 for generating information 4 in response to the sensing result from the sensor 11, and a transmitter 13 coupled to the generator 12 for wirelessly transmitting the information 4 to the second device 2.
  • a wireless transmission may comprise an infrared transmission or a radio transmission etc.
  • the first device 1 is a self-powered device. Further preferably, the first device 1 further comprises a converter 31 such as for example a solar cell for converting the light 3 originating from the second device 2 into power for feeding the first device 1. Thereto, the first device 1 may comprise a supplier 32 coupled to the converter 31 for supplying the units 11-13 and coupled to a storage cell 33 such as a battery or a capacitor for bridging interruptions in the light 3 and/or for compensating for low (insufficient) light levels of the light 3.
  • a storage cell 33 such as a battery or a capacitor for bridging interruptions in the light 3 and/or for compensating for low (insufficient) light levels of the light 3.
  • the second device 2 comprises a light source 21 such as for example one or more light emitting diodes for generating the light 3, and comprises a driver 22 coupled to the light source 21 for driving the light source 21, and comprises a receiver 23 for wirelessly receiving the information 4 from the first device 1 for adapting the driving of the light source 21.
  • the second device 2 further comprises a controller 24 coupled to the receiver 23 and to the driver 22 for controlling the driver 22.
  • the second device 2 also comprises a supplier 41 such as a battery or a mains supply or a connection to be connected to a battery or to a mains supply for supplying the units 21-24.
  • the information 4 comprises an announcement for informing the controller 24 of the second device 2. So, in the Fig. 1, the control of the driver 22 takes place in the second device 2.
  • the first and second devices 1 and 2 are shown that differ from the ones shown in the Fig. 1 in that the generator 12 in the first device 1 comprises a controller 14 for providing the information 4 with an instruction for instructing the driver 22 of the second device 2.
  • the controller 14 may, just like the units 11-13, be supplied via the supplier 32.
  • the second device 2 no longer comprises the controller 24, the receiver 23 is directly coupled to the driver 22. So, in the Fig. 2, the control of the driver 22 takes place in the first device 1.
  • LED-based lighting devices are implemented more and more. Currently they can be found as backup light, break light and in flashing light systems. First trials to use them as headlights have been made and the results are looking promising.
  • a typical market for LED-based light sources will be in the field of professional lighting (e.g. special markets) as well as in the area of consumer applications (e.g. atmosphere lighting at home). Especially in these applications higher requirements to the light sources are made. In particular a good color quality (e.g.
  • color rendering is necessary to fulfill the requirements. Further it would be of additional interest to adapt the color itself (and/or the color temperature) of such a LED light source to the user demanding.
  • white light is generated by means of a combination of a few different LEDs (with different colors). In principle the mix of these different colors is used to generate the wanted white light (or every other color) with the demanded characteristic. Often red (R), green (G) and blue (B) LEDs are used. More colors as e.g. amber (A) and/or cyan (C) or even intrinsically cold and/or warm white LEDs could be added to improve the color quality, especially the color rendering index (CRI). In principle other color combinations can be used as well. By means of such combinations the light output (luminous flux) and the color temperature of the white light can be adjusted. But also other colors could be generated (e.g. orange) if only special combinations of LEDs with different electronic driving signals are used.
  • a sensor based feedback loop may need to be implemented in order to measure the light characteristic and to steer the light output towards the desired characteristic.
  • Conventional photo sensitive devices such as e.g. light sensors (measuring the luminous flux) or (true) color sensors (measuring 'dedicated parts' of the light spectrum) can be used as sensors in combination with adequate calibration procedures. They may be combined with temperature sensing devices etc. All sensed data will be used to feed the control circuitry of the lighting device, which will adjust the driving currents of the LEDs independently as long as the required light characteristic has been reached.
  • the electronic driving currents of the LEDs can be modified in a vast variety of basic circuits, which are state of the art. Exemplarily pulse width modulation (PWM), amplitude modulation (AM) as well as direct current feeding could be used etc.
  • PWM pulse width modulation
  • AM amplitude modulation
  • the second device may comprise a large area light source, consisting of multiple light sources such as high power LEDs, driving and control electronics, diffuser and/or reflector and/or mirror and/or light-mixing construction(s).
  • a large area light source consisting of multiple light sources such as high power LEDs, driving and control electronics, diffuser and/or reflector and/or mirror and/or light-mixing construction(s).
  • the first device may be a color control module with integrated photosensitive functionality realized by means of for example at least one photo diode or several photo diodes (connected in parallel) or a multiple cluster of photo diodes (each realized by means of one photo diode or several photo diodes connected in parallel).
  • the photo responses of the sensors or of each of the cluster of sensors may be spectrally adapted by means of spectral filters realized by means of e.g. absorbing filter and/or interference filter constructions.
  • the spectral filter are adapted to parts of the visible range of light (350nm - 780 nm) corresponding to the blue, the green and the red color of the visible light.
  • the spectral filters are adapted to the three CIE-color matching functions.
  • Each of the used sensors may be extended by means of state of the art amplifier circuitry such as a current amplifier and/or a current to voltage converter and/or a voltage amplifier and/or a current to frequency converter and/or a voltage to frequency converter and/or other digital interfaces.
  • Each of the amplifier/converter circuitry may be realized with a variable and adaptable gain (automatically adjusted or externally set by e.g. digital signals supplied by external circuitry such as a microcontroller).
  • Each of the photo diodes may be internally reverse biased.
  • the first device may be a color control module with integrated power source(s) such as voltage and/or current source(s), realized by means of e.g. solar cells.
  • integrated power source(s) such as voltage and/or current source(s), realized by means of e.g. solar cells.
  • a power converting and/or transforming stage converts the currents/voltages generated by the power source(s) in a suitable operating constant voltage for the whole module.
  • a rechargeable battery and/or a relatively high value capacitor may be added, allowing the operation of the module at low light levels and/or bridging short interruptions of the power sources (solar cells).
  • the first device may be a color control module with integrated wireless transmitting functionality (possibly to be combined with a receiving functionality) based on state of the art standards in order to wirelessly transmit the photo response(s) (or the converted signals corresponding to them) from the sensors of the first device to the second device (and possibly in order to wirelessly receive other information from the second device for controlling, setting, programming and/or adjusting the first device etc.).
  • the first device may be a color control module including microcontroller functionality for directly controlling the driving electronics of the large- area light tile.
  • a main part of the color control logic may be implemented into a microcontroller in the second device, which forces the driving electronics to adjust the currents (and or the duty cycle and/or voltage and or frequency) of each LED (and/or string/cluster) to a wanted/required value in order to reach the wanted/required color point given by a user input or fixed by the manufacturer.
  • a user input may be realized by means of a wireless or IR remote control device and/or settings directly at the light-tile (e.g. switches). In order to do so the sensor signals may be required. This information is wirelessly received from the self powered sensor module.
  • the sensor module itself consists of sensors which may be added with suitable converting means (as indicated above).
  • the photo signals and/or converted signals are transmitted to the wireless interface of the large area light source.
  • the invention can be applied to almost all solid-state light sources with constant and/or variable color or color temperature, where photo sensor based feed back is required.
  • first, light-sensing devices 1 comprise sensors 11 for sensing light 3 originating from second, light-generating devices 2 and for generating sensing results and comprise generators 12 for generating information 4 in response to the sensing results and comprise transmitters 13 for wirelessly transmitting the information 4 to the second devices 2.
  • the second devices 2 comprise light sources 21 for generating the light 3 and comprise drivers 22 for driving the light sources 21 and comprise receivers 23 for wirelessly receiving the information 4 for adapting the driving of the light sources 21.
  • the first devices 1 may be self-powered devices and may comprise converters 31 for converting the light 3 for feeding the first devices 1.
  • the light sources 21 may comprise one or more light emitting diodes.
  • a computer program may be stored / distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems. Any reference signs in the claims should not be construed as limiting the scope.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

L'invention concerne d'abord des dispositifs de détection de lumière (1) comprenant des capteurs (11) destinés à détecter la lumière (3) en provenance de seconds dispositifs générateurs de lumière (2) afin de générer des résultats de détection et comprenant des générateurs (12) permettant de générer des informations (4) en réponse aux résultats de détection et comprenant des émetteurs (13) destinés à émettre sans fil ces informations (4) vers les seconds dispositifs (2). Les seconds dispositifs (2) comprennent des sources lumineuses (21) destinées à générer la lumière (3), comprennent des dispositifs d'attaque (22) destinés à attaquer les sources lumineuses (21) et comprennent des récepteurs (23) de façon à recevoir sans fil les informations (4) afin d'adapter l'attaque des sources lumineuses (21). Les premiers dispositifs (1) peuvent être des dispositifs alimentés en puissance de manière autonome et peuvent comprendre des convertisseurs (31) destiné à convertir la lumière (3) afin d'alimenter les premiers dispositifs (1). Les sources lumineuses (21) peuvent comprendre une ou plusieurs diodes électroluminescentes.
PCT/IB2008/053998 2007-10-04 2008-10-01 Dispositif de détection de lumière destiné à informer un dispositif générateur de lumière WO2009044354A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07117887.5 2007-10-04
EP07117887 2007-10-04

Publications (2)

Publication Number Publication Date
WO2009044354A2 true WO2009044354A2 (fr) 2009-04-09
WO2009044354A3 WO2009044354A3 (fr) 2009-05-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/053998 WO2009044354A2 (fr) 2007-10-04 2008-10-01 Dispositif de détection de lumière destiné à informer un dispositif générateur de lumière

Country Status (2)

Country Link
TW (1) TW200932017A (fr)
WO (1) WO2009044354A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2448371A1 (fr) * 2010-10-26 2012-05-02 Belux IP AG Procédé et agencement de commutation pour le fonctionnement d'un module à DEL à des fins d'éclairage
WO2013116101A1 (fr) * 2012-02-03 2013-08-08 Cree, Inc. Point de couleur et/ou dispositif de correction de sortie de lumen, système d'éclairage avec point de couleur et/ou correction de sortie de lumen, dispositif d'éclairage et procédés d'éclairage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011926A1 (fr) * 1999-08-10 2001-02-15 Koninklijke Philips Electronics N.V. Systeme de regulation de l'eclairage avec detecteur sans fil a distance
US20060131505A1 (en) * 2004-12-17 2006-06-22 Eastman Kodak Company Imaging element
WO2007047034A1 (fr) * 2005-10-21 2007-04-26 Hewlett-Packard Development Company, L.P. Ajustement de luminance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001011926A1 (fr) * 1999-08-10 2001-02-15 Koninklijke Philips Electronics N.V. Systeme de regulation de l'eclairage avec detecteur sans fil a distance
US20060131505A1 (en) * 2004-12-17 2006-06-22 Eastman Kodak Company Imaging element
WO2007047034A1 (fr) * 2005-10-21 2007-04-26 Hewlett-Packard Development Company, L.P. Ajustement de luminance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2448371A1 (fr) * 2010-10-26 2012-05-02 Belux IP AG Procédé et agencement de commutation pour le fonctionnement d'un module à DEL à des fins d'éclairage
WO2012055058A1 (fr) 2010-10-26 2012-05-03 Belux Ip Ag Procédé et circuit permettant de faire fonctionner un module à del à des fins d'éclairage
WO2013116101A1 (fr) * 2012-02-03 2013-08-08 Cree, Inc. Point de couleur et/ou dispositif de correction de sortie de lumen, système d'éclairage avec point de couleur et/ou correction de sortie de lumen, dispositif d'éclairage et procédés d'éclairage
US9554445B2 (en) 2012-02-03 2017-01-24 Cree, Inc. Color point and/or lumen output correction device, lighting system with color point and/or lumen output correction, lighting device, and methods of lighting

Also Published As

Publication number Publication date
WO2009044354A3 (fr) 2009-05-28
TW200932017A (en) 2009-07-16

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