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EP2109348A2 - Dispositif et système d'éclairage, et procédé de commande correspondant - Google Patents

Dispositif et système d'éclairage, et procédé de commande correspondant Download PDF

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Publication number
EP2109348A2
EP2109348A2 EP09157501A EP09157501A EP2109348A2 EP 2109348 A2 EP2109348 A2 EP 2109348A2 EP 09157501 A EP09157501 A EP 09157501A EP 09157501 A EP09157501 A EP 09157501A EP 2109348 A2 EP2109348 A2 EP 2109348A2
Authority
EP
European Patent Office
Prior art keywords
signal
control signal
lighting
control information
control
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.)
Withdrawn
Application number
EP09157501A
Other languages
German (de)
English (en)
Inventor
Carlo Albano
Claudio Spaccasassi
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.)
Ilti Luce SRL
Original Assignee
Ilti Luce SRL
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 Ilti Luce SRL filed Critical Ilti Luce SRL
Publication of EP2109348A2 publication Critical patent/EP2109348A2/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • H05B47/184—Controlling the light source by remote control via data-bus transmission using digital multiplexed [DMX] communication protocols
    • 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
    • H05B47/185—Controlling the light source by remote control via power line carrier transmission

Definitions

  • the present invention relates to a lighting device and system and to a corresponding control method, for example designed for household applications; in particular, the following description will make explicit reference, without this implying any loss of generality, to a lighting system using LED (Light Emitting Diode) light sources and a communication protocol of a DMX512 type.
  • LED Light Emitting Diode
  • LED light sources are known in a wide range of fields of application, for example in the automotive field, in indoor and outdoor lighting, and in industrial or consumer electronics; LEDs enable in fact a high lighting efficiency combined with low consumption levels.
  • DMX512 communication protocol also known as E1.11, USITT DMX-512-A standard
  • E1.11, USITT DMX-512-A standard for control of complex lighting systems that are provided with a number of lighting devices or units.
  • Figure 1 illustrates by way of example a lighting system, designated as a whole by the reference number 1, which uses the DMX512 protocol.
  • the lighting system 1 comprises: a controller 2 (commonly defined as DMX512 console), operating as “master”; a plurality of controlled devices 3, having “slave” functions; and a plurality of power supplies 4, which are each connected to the electric mains supply (and consequently receive a mains voltage of 220 V or 110 V) and which supply a respective controlled device 3.
  • a controller 2 commonly defined as DMX512 console
  • a plurality of controlled devices 3 having “slave” functions
  • a plurality of power supplies 4 which are each connected to the electric mains supply (and consequently receive a mains voltage of 220 V or 110 V) and which supply a respective controlled device 3.
  • the controller 2 is connected at output to a first one of the controlled devices 3 and transmits a DMX512 control signal, for controlling the lighting system 1, through a DMX512 communication line.
  • the DMX512 control signal is a digital signal transmitted in an asynchronous serial mode at the rate of 250 Kbit/s, and generally contains a start byte, followed by up to a maximum of 512 information bytes, each byte representing a different DMX512 channel.
  • the controlled devices 3 are cascaded according to the so-called "daisy-chain" mode, and comprise each a DMX512 input, connected to the preceding controlled device 3 in the chain, and a DMX512 output, connected to the next controlled device 3 in the chain by means of a respective DMX512 communication line.
  • the first controlled device 3 of the chain is connected to the output of the controller 2 and receives the DMX512 control signal, which is then retransmitted in the chain from one controlled device 3 to the next.
  • Each controlled device 3 comprises a respective lighting assembly 5, formed by a plurality of light sources 6, connected in series to one another (as will be described in detail hereinafter).
  • each light source 6 is of the RGB-LED type (so-called "RGB spotlights"), and is constituted by a set of three LEDs, which generate one a red light, one a green light, and one a blue light.
  • Each controlled device 3 is associated to one or more channels of the DMX512 control signal, and comprises a communication interface 7, designed to extract from the DMX512 control signal one or more information bytes (or channels) associated thereto, and to process these information for driving the respective lighting assembly 5.
  • the DMX512 address of each controlled device 3 (which indicates the information bytes associated thereto) can be set via a switching unit of the DIP-switch type 8, with which each controlled device 3 is equipped.
  • each controlled device 3 drives, by means of a respective driving stage (not illustrated herein), supplied by the respective power supply 4, the lighting assembly 5 associated thereto; for example, each controlled device 3 can receive a first channel, carrying colour information, and a second channel, carrying brightness information for driving the corresponding light sources 6.
  • the driving stage generates, and transmits at output to the lighting assembly 5, PWM (Pulse-Width Modulation) driving signals and is designed to adjust the brightness and colour of the light emitted by the respective lighting assembly 5 by means of a variation of the duty cycle and amplitude values of the generated PWM driving signals.
  • the variation of the duty cycle involves a variation of the rate of turning-on and turning-off of the light sources 6, and consequently a variation of the emitted brightness.
  • the communication interface 7 has: a pair of supply inputs 7a, which receives a supply signal Val from the respective power supply 4 (not illustrated herein), for example a 24-V voltage signal, with a power of between 60 W and 100 W; a first pair of outputs 7b, designed to drive the blue LEDs (B) of the light sources 6 with a first PWM driving signal; a second pair of outputs 7c, designed to drive the green LEDs (G) of the light sources 6 with a second PWM driving signal; and a third pair of outputs 7d, designed to drive the red LEDs (R) of the light sources 6 with a third PWM driving signal.
  • a supply signal Val Val from the respective power supply 4 (not illustrated herein), for example a 24-V voltage signal, with a power of between 60 W and 100 W
  • a first pair of outputs 7b designed to drive the blue LEDs (B) of the light sources 6 with a first PWM driving signal
  • a second pair of outputs 7c designed to drive the green LEDs (G
  • each LED has a first terminal connected to the LED that precedes it in the cascade, and a second terminal connected to the next LED in the cascade.
  • each controlled device 3 is hence able to adjust the light emitted by the respective lighting assembly 5, driving simultaneously with one and the same PWM driving signal, the LEDs of the same type (in this case of the same colour) of the various light sources 6 connected in series.
  • the colour of the emitted light it is possible to control the colour of the emitted light, and adjust its brightness (operation known as "dimming").
  • each light source 6 of each controlled device 3 consequently requires six electrical wires.
  • this cascaded connection is not made at the various light sources 6, but within a junction box, conveyed into which are all the electrical wires (for example, in a number equal to sixty, in the case where ten light sources 6 are present) associated to the various light sources 6 of the controlled device 3.
  • the aim of the present invention is consequently to solve the aforementioned problems and disadvantages by providing a lighting system that will have a lower complexity and consequently reduced costs and times for installation.
  • a lighting device and system are provided as defined in claims 1 and 12, respectively; further provided is a corresponding control method, as defined in claim 19.
  • a lighting system 10 has a structure substantially similar to the one described with reference to Figure 1 , so that parts that are similar will be designated by the same reference numbers and will not be described in detail again.
  • a controller (or console) 2 is operatively coupled to a plurality of controlled devices, here designated by 3', via the DMX512 protocol, and the controlled devices 3' are cascaded together according to a "daisy-chain" connection.
  • Each controlled device 3' is supplied by a respective power supply 4 (which may be provided inside or outside the same controlled device), and comprises a respective lighting assembly, here designated by 5', provided with light sources, here designated by 6', for example of the RGB-LED type.
  • the communication interface of each controlled device 3' is designed to decode the DMX512 control signal received by the controller 2 to extract the information bytes associated to the same controlled device (in a way substantially similar to what has been described previously), and is further configured so as to re-encode in numeric form the control information thus extracted so as to generate a serial control signal, designed to control lighting parameters of the light sources 6' of the respective lighting assembly 5'.
  • the serial control signal is retransmitted at output in the form of an asynchronous serial data flow having a given format and a given transmission rate.
  • the data format may envisage transmission of a control byte for each type of LED of the light sources 6' (for example, for a total of three control byte, one for control of the blue LEDs, one for control of the green LEDs, and one for control of the red LEDs), and of one or more verify bits, for example, implementing a check-sum sequence;
  • the transmission rate used for re-transmission of the control information is, for example, lower than the transmission rate envisaged by the DMX512 protocol, for example, equal to 96% of this rate (for example, lower than 10 Kbit/s).
  • the DMX512 control signal carries general control information for a lighting assembly 5' (for example, corresponding to the colour and to the intensity of the light that is to be emitted), whilst the serial control signal carries specific information (processed by the communication interface 7' as a function of the aforesaid general information) regarding the operating parameters required of the individual LEDs of the light sources 6'.
  • the communication interface 7' is provided with a purposely designed processing logic circuit (not illustrated herein), comprising, for example, a microprocessor.
  • the control information thus encoded are transmitted to the corresponding lighting assembly 5' through a transmission line comprising just two electrical wires, common to all the light sources 6' of the lighting assembly 5'.
  • Each light source 6' is in fact provided with a decoding circuit (described hereinafter), designed to receive the serial data flow that encodes the control information from the communication interface 7', and to obtain therefrom the information necessary for driving the various types of LEDs.
  • the decoding circuit is provided with a respective processing logic circuit, comprising, for example, a microprocessor (the light sources 6' can consequently be defined as “smart light sources").
  • the communication interface 7' is further configured so as to combine or mix the control information (contained in the serial control signal) to the supply signal Val (for example, once again equal to 24 V and with a power of between 60 W and 100 W) so as to transmit with just the two electrical wires both the same control information and the supply signal necessary for driving the light sources 6'.
  • the decoding circuit on board each light source 6' is consequently able to decode the control information separating it from the supply signal, whilst a driving circuit (described hereinafter), which is also on board the light source 6', is able to implement the driving operations on the basis of the decoded control information, using the supply signal.
  • each lighting assembly 5' The light sources 6' of each lighting assembly 5' are in this case connected in parallel to one another, having each a first input and a second input connected to a respective electrical wire of the transmission line.
  • the communication interface 7' comprises: a first logic circuit 12, for example provided with a microprocessor, designed to receive and process the DMX512 control signal so as to generate the serial control signal, having the desired data format; a data buffer 14, connected to the first logic circuit 12, and used by the same first logic circuit 12 for storing temporarily the DMX512 control signal (given the different rate of retransmission of the serial control signal); and an encoding circuit 16, connected to the output of the first logic circuit 12 and to the power supply 4 and designed to receive the serial control signal and to generate an encoded signal Sc, which mixes the control information to the supply signal Val.
  • the encoded signal Sc is sent to the output of the interface circuit 7', and transmitted, by means of the transmission line with two electrical wires, to the lighting assembly 5'.
  • the encoding circuit 16 comprises a circuit formed by an H bridge of MOSFET transistors, and implements the encoding of the control information in the form of a reversal of polarity of the supply signal Val.
  • the encoded signal Sc is a voltage signal having two possible values (+24 V or -24 V), corresponding to the serial control signal generated by the interface circuit 7' (for example, corresponding to a binary value "1" of the serial control signal is a value of +24 V of the encoded signal, and corresponding to a binary value "0" of the serial control signal is a value -24 V of the encoded signal).
  • the H-bridge circuit has a first input, which receives the supply signal Val, a second input connected to a reference potential (the ground of the circuit), and a first output and a second output, present between which is the encoded signal Sc, and comprises four MOSFETs 18a-18d, operatively coupled in pairs.
  • a first MOSFET 18a is connected between the first input and the first output and has its control terminal that is connected to the output of the interface circuit 7' and receives the serial control signal;
  • a second MOSFET 18b which is operatively coupled to the first MOSFET 18a, is connected between the second input and the second output and has its control terminal connected to the output of the interface circuit 7';
  • a third MOSFET 18c is connected between the first input and the second output and has its control terminal connected to the output of the interface circuit 7' with the interposition of an inverter stage 19 (consequently, it receives the negated serial control signal);
  • a fourth MOSFET 18d which is operatively coupled to the third MOSFET 18c, is connected between the second input and the first output and has its control terminal connected to the output of the interface circuit 7' with the interposition of the inverter stage 19.
  • the decoding circuit, designated by 20, of each light source 6' comprises: a level-translator stage 21, which is connected to the transmission line with two electrical wires, receives at input the encoded signal Sc, and supplies at output a translated encoded signal (which has, for example, a dynamics of +/-5 V); and a second logic circuit 22, for example, provided with a respective microprocessor circuit, which is connected to the output of the level-translator stage 21 and receives the translated encoded signal, and is designed to decode the control information transmitted by the interface circuit 7' (in particular, separating the serial data flow from the supply signal Val).
  • the second logic circuit 22 also processes the decoded information so as to generate driving control signals.
  • the driving circuit, designated by 24, of each light source 6' comprises: a rectifier stage 25, which receives at input, and is designed to rectify, the encoded signal Sc (so as to reconstruct the supply signal Val); and a plurality of driving stages 26, which receive the d.c. supply signal Val rectified by the rectifier stage 25, and respective driving control signals generated by the second logic circuit 22.
  • the driving stages 26 generate at output PWM driving signals (for example, current signals), designed to drive in an appropriate way respective lighting elements 28 of the light source 6'.
  • each light source 6', of the RGB-LED type comprises three lighting elements 28 (three LEDs, a red one, a green one, and a blue one), and the driving circuit 24 comprises three driving stages 26, each designed to drive a respective lighting element 28.
  • the light sources 6' of each lighting assembly 5' receive the encoded signal Sc, decode it internally via the respective decoding circuits 20, and drive accordingly the respective lighting elements 28 by means of the respective driving circuits 24. Consequently, the lighting elements 28 of a same type (or colour) are turned on in a substantially simultaneous way, according to the same operating modes (for example, with a same brightness).
  • a variant of the lighting system 10 may, however, envisage that the light sources 6' of each lighting assembly 5' can be addressed separately.
  • the first logic circuit 12 of the interface circuit 7' is configured so as to generate a serial control signal that associates address information to the control information corresponding to the lighting parameters; for example, the protocol can envisage serial transmission of an address byte followed by one or more bytes containing the control information.
  • the decoding circuit 20 of each light source 6' is configured so as to read the address information and to extract and decode only the control information associated to the address assigned to the same light source 6'.
  • a control system of this type enables a greater flexibility and variety of lighting configurations, without leading to an increase of the complexity of the lighting system.
  • the use of "smart" light sources 6' enables use of a single transmission line with just two electrical wires for connection between each communication interface 7' and the respective lighting assembly 5'.
  • a serial control signal common to all the light sources 6', is transmitted on the transmission line and appropriately interpreted by the decoding circuit 20 of each light source 6' so as to suitably drive the corresponding lighting elements 28.
  • the complexity of the electrical connections in the lighting system 10 is extremely reduced, as likewise the times and costs required for installation. For example, it is not necessary to make electrical connections between the various light sources 6' of the same lighting assembly 5' (unlike the cascaded connection described with reference to the known art).
  • the light sources 6' can moreover be individually addressed by the controller 2, enabling a considerable increase in the versatility of the system and of the lighting effects that can be obtained.
  • each light source 6' makes it possible to prevent a failure on one of them from having repercussions on the others.
  • the presence of a processing logic circuit on board each light source 6' enables rapid diagnosis of the possible failures.
  • the system described has reduced electromagnetic disturbance, in so far as it does not envisage transmission of PWM driving signals to the various light sources 6' (which, as is known, can be a source of radio-frequency emissions).
  • a communication protocol can be used between the controller 2 and the various controlled devices 3' that is different from the DMX512 protocol; for example, it is possible to use the RDM (Remote Device Management) protocol, the TCP-IP protocol, or the DALI protocol.
  • RDM Remote Device Management
  • TCP-IP Transmission Control Protocol
  • DALI DALI protocol
  • a wireless transmission could be implemented between the controller 2 and the controlled devices 3', and between the controlled devices 3' themselves, which could be provided for this purpose with an appropriate radio transceiver.
  • the signals could be transmitted at distances of up to 250 metres (the assemblies of independent LEDs could, for example, be isolated and installed at even considerable distances from one another), further favouring the use of the technology described in residential, industrial, and urban domotics.
  • the data format generated by the first logic circuit 12 in the communication interface 7' may be different, as may also be different the protocol for transmission of these data; the decoding circuit 20 of the light sources 6' may be modified accordingly.
  • the encoding circuit 16 could be configured so as to implement a different encoding of the control information, and/or a different "mixing" with the supply signal Val.
  • the supply signal Val could be appropriately modulated as a function of the information to be transmitted.
  • a variant of the supply system 10 envisages transmission of the serial control signal to the light sources 6', separately from the supply signal Val (the encoding circuit 16 is consequently not present in the communication interface 7').
  • two further electrical wires are used for transmitting the supply signal Val to the various light sources 6', in addition to the two electrical wires carrying the control information.
  • this solution enables a simplification of the operations required for the decoding circuit 20 in the various light sources 6', it being consequently possible to simplify the same circuit and so reduce its costs.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP09157501A 2008-04-08 2009-04-07 Dispositif et système d'éclairage, et procédé de commande correspondant Withdrawn EP2109348A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000268A ITTO20080268A1 (it) 2008-04-08 2008-04-08 Dispositivo e sistema di illuminazione, e relativo metodo di controllo

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EP2109348A2 true EP2109348A2 (fr) 2009-10-14

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IT (1) ITTO20080268A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2474030C2 (ru) * 2011-03-28 2013-01-27 Открытое акционерное общество ОАО "Орбита" Способ и система для управления электрическим оборудованием, в частности системой освещения
CN102945653A (zh) * 2012-11-09 2013-02-27 深圳市晟碟半导体有限公司 一种级联led芯片进行内控显示的方法和系统
WO2013050954A1 (fr) * 2011-10-07 2013-04-11 Koninklijke Philips Electronics N.V. Procédés et appareil pour communication dmx512 améliorée avec somme de contrôle
WO2013059848A1 (fr) * 2011-10-25 2013-05-02 Tridonic Gmbh & Co. Kg Procédé pour l'éclairage d'une pièce
EP2640166A1 (fr) * 2012-03-12 2013-09-18 Anteya Technology Corporation Gradateur de puissance élevée et système de gradation à modes de puissance commutables, dispositif de gradation et procédé de transmission de puissance et commandes de gradation
CN110381629A (zh) * 2019-06-25 2019-10-25 广州达森灯光股份有限公司 一种手持式多功能灯具控制器及存储介质
CN111954340A (zh) * 2020-08-10 2020-11-17 深圳市汇德科技有限公司 一种dmx512信号放大器及led控制系统
CN114071838A (zh) * 2021-11-08 2022-02-18 广东欧曼科技股份有限公司 极性自动适配解码控制板及灯光系统
CN115001624A (zh) * 2022-05-11 2022-09-02 江苏领焰智能科技股份有限公司 基于dmx512协议的编码传输方法、系统、设备及存储介质

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107509273A (zh) * 2017-08-30 2017-12-22 深圳市汇德科技有限公司 一种基于led控制系统的解码装置和一种led控制系统

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2474030C2 (ru) * 2011-03-28 2013-01-27 Открытое акционерное общество ОАО "Орбита" Способ и система для управления электрическим оборудованием, в частности системой освещения
WO2013050954A1 (fr) * 2011-10-07 2013-04-11 Koninklijke Philips Electronics N.V. Procédés et appareil pour communication dmx512 améliorée avec somme de contrôle
US9378087B2 (en) 2011-10-07 2016-06-28 Koninklijke Philips N.V. Methods for improved DMX512 communication while maintaining backwards compatibility
RU2608542C2 (ru) * 2011-10-07 2017-01-19 Филипс Лайтинг Холдинг Б.В. Способы и устройство для улучшенной передачи данных dmx512, которая имеет контрольную сумму
WO2013059848A1 (fr) * 2011-10-25 2013-05-02 Tridonic Gmbh & Co. Kg Procédé pour l'éclairage d'une pièce
EP2640166A1 (fr) * 2012-03-12 2013-09-18 Anteya Technology Corporation Gradateur de puissance élevée et système de gradation à modes de puissance commutables, dispositif de gradation et procédé de transmission de puissance et commandes de gradation
CN102945653A (zh) * 2012-11-09 2013-02-27 深圳市晟碟半导体有限公司 一种级联led芯片进行内控显示的方法和系统
CN110381629A (zh) * 2019-06-25 2019-10-25 广州达森灯光股份有限公司 一种手持式多功能灯具控制器及存储介质
CN111954340A (zh) * 2020-08-10 2020-11-17 深圳市汇德科技有限公司 一种dmx512信号放大器及led控制系统
CN114071838A (zh) * 2021-11-08 2022-02-18 广东欧曼科技股份有限公司 极性自动适配解码控制板及灯光系统
CN115001624A (zh) * 2022-05-11 2022-09-02 江苏领焰智能科技股份有限公司 基于dmx512协议的编码传输方法、系统、设备及存储介质
CN115001624B (zh) * 2022-05-11 2023-08-18 江苏领焰智能科技股份有限公司 基于dmx512协议的编码传输方法、系统、设备及存储介质

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