WO2009060373A1 - Luminaire, dispositif et procédé de commande - Google Patents

Luminaire, dispositif et procédé de commande Download PDF

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Publication number
WO2009060373A1
WO2009060373A1 PCT/IB2008/054563 IB2008054563W WO2009060373A1 WO 2009060373 A1 WO2009060373 A1 WO 2009060373A1 IB 2008054563 W IB2008054563 W IB 2008054563W WO 2009060373 A1 WO2009060373 A1 WO 2009060373A1
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WO
WIPO (PCT)
Prior art keywords
light
oled
control
luminaire
control command
Prior art date
Application number
PCT/IB2008/054563
Other languages
English (en)
Inventor
Coen A. Verschuren
Original Assignee
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Publication of WO2009060373A1 publication Critical patent/WO2009060373A1/fr

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/60—Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
    • 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 invention relates to lighting systems. More particular it relates to a luminaire including an OLED device, i.e. an Organic Light Emitting Diode device, that is remotely controllable by means of light illumination of the luminaire. Furthermore, it relates to a control device and a method for controlling a luminaire.
  • OLED device i.e. an Organic Light Emitting Diode device
  • a LED in addition to its light emitting mode, can be set to a light sensing mode where it senses incident light and responds by generating a current.
  • This function has been employed in lighting applications for remotely controlling a luminaire to switch on/off. Primarily, all that it takes is to periodically set the LED in the light sensing mode during a short interval, and to perform a threshold detection of the current generated by the LED during that interval. Illuminating the LED enables detection of a current above the threshold. In response, the LED may be switched on (i.e. emit light) if it was off initially. By illuminating the LED a second time it may be switched back off. Hence, this allows toggling the LED between the on and off states.
  • OLEDs for lighting applications can be manufactured to have extreme properties (for instance small thickness or transparency) a number of new and unique applications are reachable, which would make the above-mentioned receiver structure inconvenient or even prevent some applications.
  • the invention is based on an insight that it is possible to generate and detect by means of the OLED, a light control signal carrying one of several different control commands.
  • a luminaire comprising an OLED, a light setting device connected with the OLED, and a mode switching unit connected with the OLED.
  • the OLED has a light emitting mode and a light sensing mode.
  • the light setting device comprises a control command retriever and an OLED controller.
  • the luminaire is arranged to sense a remotely emitted control light signal by means of the OLED in said light sensing mode.
  • the control light signal comprises a header portion and a control command portion following said header portion.
  • the control command retriever is arranged to recognize the header portion and retrieve the control command.
  • the OLED controller is arranged to control the OLED in accordance with said control command.
  • control command is constituted by several bits of data, which are represented as signal levels. This enables a simple level detection as a means for determining what command has been received.
  • the header portion is employed not only for pure recognition of the light control signal but also for calibrating the control command retriever so as to ensure that the signal levels will be correctly identified.
  • the header portion is additionally employed for synchronization purposes.
  • the luminaire advantageously has a current sensor sensing the output current of the OLED in the light sensing mode.
  • the OLED repeatedly is switched between the light emitting mode and the light sensing mode, thereby facilitating the recognition of the light control signal.
  • a method of controlling a luminaire which comprises an OLED, the method comprising: - alternately setting the OLED in a light emitting mode and a light sensing mode; when the OLED is in the light sensing mode: sensing a remotely emitted control light signal, which comprises a header portion and a control command portion following the header portion; - recognizing said header portion; and retrieving a control command from said control command portion; and when the OLED is in the light emitting mode: controlling the OLED in accordance with said control command.
  • the invention provides a remote control device arranged to generate and emit a remotely emitted control light signal intended for a luminaire according to claim 1.
  • the remote control device comprises a control light signal generator, a transmitter unit, which is connected with the control light signal generator, and a user interface, which is connected with the control light signal generator.
  • the remote control device further comprises a light detector and a processing unit arranged to extract a frequency and a phase from light measured by the light detector.
  • extracting the frequency and phase of the modulation of light emitted by a luminaire with the processing unit allows synchronising the frequency generator of the remote control device with the frequency generator clocking the command detector of the luminaire.
  • Fig. 1 is a schematic block diagram of an embodiment of the luminaire according to the present invention.
  • Fig. 2 is a schematic block diagram of an embodiment of a remote controller that is usable together with the luminaire;
  • Fig. 3 is a flow chart of an embodiment of a method for controlling a luminaire according to the invention.
  • Figs. 4-6 are timing diagrams illustrating the behaviour of signals involved in different embodiments of the lighting system according to the present invention
  • Fig. 7 is a schematic block diagram of another embodiment of a remote controller that is usable together with the luminaire.
  • the luminaire 100 comprises an OLED device 102, and a light setting device, which comprises a control command retriever 104, and an OLED controller 110.
  • the OLED device comprises at least one OLED.
  • the control command retriever 104 comprises a current sensor 106, which is connected with an output of the OLED device 102, and a command detector 108, which is connected with an output of the current sensor 106, and with an input of the OLED controller 110.
  • the OLED controller is further connected with an input of the OLED device 102.
  • the luminaire further comprises a mode switching circuit 112, which is connected with an input of the OLED controller 110, a reset pulse unit 114, which is connected with another input of the OLED controller 110, and a frequency generator 116, which is connected with an input of the mode switching unit 112, an input of the reset pulse unit 114, and an input of the command detector 108.
  • a mode switching circuit 112 which is connected with an input of the OLED controller 110
  • a reset pulse unit 114 which is connected with another input of the OLED controller 110
  • a frequency generator 116 which is connected with an input of the mode switching unit 112, an input of the reset pulse unit 114, and an input of the command detector 108.
  • an embodiment of a remote control device 200 comprises a control light signal generator 202, a transmitter unit 204, which is connected with an output of the control light signal generator 202, a user interface 206, which is connected with a first input of the control light signal generator 202, a memory 208, which is connected with a second input of the control light signal generator 202, and a frequency generator 210, which is connected with a third input of the control light signal generator 202.
  • the transmitter unit comprises a light source, such as a laser or a Light Emitting Diode (LED) with appropriate collimating optics (such as a simple lens system) to achieve a reasonably narrow beam.
  • the wavelength of said light source is preferably in the short wavelength / high energy side of the visible spectrum, e.g. in the range of 400-450 nm (blue).
  • the luminaire 100 is operated as follows, as illustrated with the flow chart of Fig. 3.
  • the OLED device 102 is set in one of a light emitting mode and a light sensing mode, as shown at box 301 of the flow chart, by means of the mode switching circuit 112. More particularly, in this embodiment, the OLED device 102 is continuously toggled by the OLED controller 110, in accordance with an input signal received from the mode switching unit 112, between the light emitting mode and the light sensing mode at a predetermined frequency. The frequency is in turn generated by the frequency generator 116, which feeds a frequency signal to the mode switching circuit 112.
  • the OLED device 102 In the emitting mode, the OLED device 102 emits light according to its settings as determined by driving power applied by the OLED controller 110. In the light sensing mode, the driving power is switched off and the OLED device 102 is able to sense received light and to generate a current corresponding to the received light intensity. Thus, in the sensing mode the OLED device 102 senses a remotely emitted control light signal, i.e. the control light signal generated by the remote control device 200, at box 302. The toggling mentioned above is used such that each time the OLED device 102 is in the sensing mode it detects at least a portion of the control light signal. The signal has a header portion and a control command portion, which follows the header portion, as shown in Fig. 4.
  • control light signal it is constituted by a plurality of consecutive bits.
  • the header portion is represented by two bits and the command portion is represented by three bits.
  • Each bit is a multilevel bit, and in this particular embodiment there are four different levels.
  • the control light signal has been generated by means of the control light signal generator 202 and transmitted, i.e. emitted, by means of the transmitter unit 204.
  • the header portion of the received control light signal is then recognized by the control command retriever 104, at box 303.
  • the current sensor 106 senses the current that the received signal induces in the OLED device 102, and associates the level of the current with one of a set of different predetermined levels. Then the current sensor forwards information about the selected predetermined level to the command detector 108, which is arranged to recognize the header portion as a specific combination of two bits, i.e. two levels. Having detected the header portion, the command detector retrieves a control command from the control command portion, box 304. That is, the command detector 108 knows that the three bits following the two header bits represent the command. Depending on the combination of levels the command detector 108 associates the three bit combination with one particular command out of a set of several commands. In order to facilitate the recognition operation the frequency generator, that clocks inter alia the command detector 108 generates the same frequency as the frequency generator 210 of the remote control device 200. More details will follow below.
  • the command detector 108 provides information about the command to the OLED controller 110.
  • the OLED controller 110 controls the OLED device 102 in accordance with the command, box 305. This means that when the OLED device 102 is again set in the emitting mode, the OLED controller 110 applies drive power to the OLED device 102 such that the light output of the OLED device corresponds to the intentions of the user input that was received at user interface 206 of the remote control device 200.
  • Various commands are possible, for example increase intensity, decrease intensity, switch on or off, and select a lighting pattern among a set of predetermined lighting patterns.
  • control light signal generator 202 When the user inputs a command to the control light signal generator 202, it fetches information about the associated bit pattern from the memory 208. Then the control light signal generator 202 generates that pattern and feeds the pattern to the transmitter unit 204.
  • the frequency generator generates a 50 Hz reference frequency.
  • the OLED device 102 is toggled between the sensing and emitting modes at that frequency, as illustrated by the "sense" signal in the diagram.
  • the "sense" signal alternates between a high state and a low state at 50 Hz, i.e. the period of "sense” is 20 ms and the duration of each state is 10 ms.
  • the OLED controller 110 i.e.
  • the reset pulse unit 114 provides a "reset" pulse to the OLED device 102 via the OLED controller 110, which reset pulse briefly shorts the OLED device 102 at the very beginning of each period when "sense" is high.
  • the control light signal is synchronized with the "sense" signal.
  • the OLED device 102 consecutively operates in the sensing mode and the emitting mode during each bit of the control light signal.
  • the induced current rises to a principally constant level.
  • the detection performed by the command detector 108 is performed during the latter half of the duration of the high state of "sense". This is illustrated by “detec. interval” in the timing diagram.
  • the header portion is used for identification, or synchronization, purposes.
  • the command detector 108 detects a particular, and predetermined, combination of two consecutive bit levels it knows that the three bits to follow directly thereafter will represent a command.
  • an identification of the control light signal can be a first bit having the highest level followed by a second bit having the lowest level. That will exclude some combinations of command bit levels reducing the available number of different commands to 56, which is sufficient for a quite advanced functionality of the lighting system.
  • the header bits can be used for calibration purposes. Shifting operational conditions can occur, leading to uncertainty about a detected level. When many possible current levels are used for each bit the distance between two adjacent levels is small. If the induced current is shifting the level may fall in the middle between two levels or even closer to another bit level than generated at the remote control device 200. Then, if the levels of the header bits are used to calibrate the scale of the detector levels such errors can be avoided or at least minimized.
  • the remote control device 200 comprises a light detector 212 and a processing unit 214. Pointing the remote control device at a luminaire 100, this enables it to detect the light emitted by the luminaire. As the light emitted is modulated due to the alternating setting of the light emitting and sensing modes, extracting the frequency and phase of this modulation with the processing unit 214 allows to synchronise the frequency generator 210 of the remote control device 200 with the frequency generator clocking the command detector 108 of the luminaire 100. Advantageously, this results in synchronization of the control light signal generator 202 and thus of the control light signal transmitted.
  • the light detector 212 beneficially comprises a spatial filter arrangement.
  • the spatial filter arrangement may consist of one or more apertures at a fixed distance from and aligned with the light detector 212. Additionally it may comprise some collimating optics to provide an enhanced 'forward' directed sensitivity.
  • toggling the OLED between the sensing mode and light emitting mode at other frequencies than 50 Hz and 60Hz helps avoiding interference with other light sources. Higher frequencies will have the benefit of furthermore avoiding or at least reducing user to experience an undesirable flicker.
  • the remote control device 200 and the luminaire 100 are not frequency synchronized. Then the bits of the control light signal may reach the luminaire 100 shifted in time relative to the detection interval, as illustrated in Fig. 5. This causes erroneous level detection by the command detector 108, or the command detector 108 may even fail in detecting the header portion. This can be prevented by repeating the transmission of the control light signal shifted by an interval that is equal to the detection interval, i.e. one fourth of the period of the sense signal, as illustrated in Fig. 6. It should be noted that the shifting is illustrated by a thicker piece of line about at the middle of the control light signal in the diagram. Above, embodiments of the luminaire and method according to the present invention as defined in the appended claims have been described. These should be seen as merely non-limiting examples. As understood by a skilled person, many modifications and alternative embodiments are possible within the scope of the invention.
  • the frequency can be altered within an interval.
  • a too high frequency leads to uncertainty in the detection of signal levels and problems with the light generation as well.
  • a too low frequency will cause too slow adjustment of the light output of the OLED device, which will irritate the user.
  • this invention relates to a luminaire comprising an OLED device, where a light detecting function of the OLED device is employed for transmitting light setting commands to the luminaire from a remote position by means of a control light signal, which carries command information.
  • the control light signal has a header portion, which can be recognized by the luminaire and makes it ready to receive a command, and a following control command portion.

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  • Electroluminescent Light Sources (AREA)

Abstract

Cette invention concerne un luminaire comprenant un dispositif OLED (à diode électroluminescente organique). La fonction de détection de lumière de ce dispositif OLED est utilisée pour transmettre des instructions de réglage de la lumière à un luminaire depuis un point éloigné, ceci au moyeu d'un signal lumineux de commande qui achemine des instructions. Le signal lumineux de commande comprend une partie en-tête qui peut être reconnue par le luminaire et le prépare à recevoir une instruction, et une partie d'instruction de commande subséquente.
PCT/IB2008/054563 2007-11-07 2008-11-03 Luminaire, dispositif et procédé de commande WO2009060373A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP07120130 2007-11-07
EP07120130.5 2007-11-07
EP07121727 2007-11-28
EP07121727.7 2007-11-28

Publications (1)

Publication Number Publication Date
WO2009060373A1 true WO2009060373A1 (fr) 2009-05-14

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Application Number Title Priority Date Filing Date
PCT/IB2008/054563 WO2009060373A1 (fr) 2007-11-07 2008-11-03 Luminaire, dispositif et procédé de commande

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011059664A2 (fr) 2009-10-29 2011-05-19 Global Oled Technology Llc Éclairage par surface électroluminescente à commutateur mécanique intégré
WO2013025544A1 (fr) * 2011-08-17 2013-02-21 Surefire, Llc Programmation d'un contrôleur de dispositif d'éclairage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298963A1 (fr) * 2001-09-26 2003-04-02 Siemens Aktiengesellschaft LED por transmission and reception
WO2003084102A1 (fr) * 2002-04-03 2003-10-09 Mitsubishi Denki Kabushiki Kaisha Emetteur-recepteur de communication optique et procede permettant d'emettre/recevoir des donnees
US20050036294A1 (en) * 2003-08-12 2005-02-17 Overhead Door Corporation Device including light emitting diode as light sensor and light source
WO2006012737A1 (fr) * 2004-08-06 2006-02-09 Tir Systems Ltd. Systeme d'eclairage comprenant une emission et une detection photonique utilisant des elements electroluminescents
WO2007004097A1 (fr) * 2005-06-30 2007-01-11 Koninklijke Philips Electronics N.V. Dispositif de commande de couleur a distance et systeme d'eclairage
WO2007057822A1 (fr) * 2005-11-21 2007-05-24 Koninklijke Philips Electronics N.V. Dispositif d'eclairage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1298963A1 (fr) * 2001-09-26 2003-04-02 Siemens Aktiengesellschaft LED por transmission and reception
WO2003084102A1 (fr) * 2002-04-03 2003-10-09 Mitsubishi Denki Kabushiki Kaisha Emetteur-recepteur de communication optique et procede permettant d'emettre/recevoir des donnees
US20050036294A1 (en) * 2003-08-12 2005-02-17 Overhead Door Corporation Device including light emitting diode as light sensor and light source
WO2006012737A1 (fr) * 2004-08-06 2006-02-09 Tir Systems Ltd. Systeme d'eclairage comprenant une emission et une detection photonique utilisant des elements electroluminescents
WO2007004097A1 (fr) * 2005-06-30 2007-01-11 Koninklijke Philips Electronics N.V. Dispositif de commande de couleur a distance et systeme d'eclairage
WO2007057822A1 (fr) * 2005-11-21 2007-05-24 Koninklijke Philips Electronics N.V. Dispositif d'eclairage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011059664A2 (fr) 2009-10-29 2011-05-19 Global Oled Technology Llc Éclairage par surface électroluminescente à commutateur mécanique intégré
US8115383B2 (en) 2009-10-29 2012-02-14 Global Oled Technology Llc Electroluminescent area illumination with integrated mechanical switch
WO2013025544A1 (fr) * 2011-08-17 2013-02-21 Surefire, Llc Programmation d'un contrôleur de dispositif d'éclairage
US8981650B2 (en) 2011-08-17 2015-03-17 Surefire, Llc Lighting device controller programming

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