WO2010035291A1 - Système et procédé de commande de l’éclairage d’appareils d’éclairage par del - Google Patents

Système et procédé de commande de l’éclairage d’appareils d’éclairage par del Download PDF

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Publication number
WO2010035291A1
WO2010035291A1 PCT/IT2008/000608 IT2008000608W WO2010035291A1 WO 2010035291 A1 WO2010035291 A1 WO 2010035291A1 IT 2008000608 W IT2008000608 W IT 2008000608W WO 2010035291 A1 WO2010035291 A1 WO 2010035291A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
duty cycle
control system
pwm
control
Prior art date
Application number
PCT/IT2008/000608
Other languages
English (en)
Inventor
Leonardo Cantalupi
Original Assignee
Cantalupi Lighting S.R.L.
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 Cantalupi Lighting S.R.L. filed Critical Cantalupi Lighting S.R.L.
Priority to PCT/IT2008/000608 priority Critical patent/WO2010035291A1/fr
Publication of WO2010035291A1 publication Critical patent/WO2010035291A1/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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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]
    • H05B45/10—Controlling the intensity 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/39—Circuits containing inverter bridges

Definitions

  • the present invention relates to an electronic system suitable for power- supplying-and lighting control of monochromatic LED illuminating apparatuses with Low-voltage DC driver, particularly indicated in lighting for civil and nautical use for control of up to a high number (>30) of illuminating apparatuses.
  • a driver that can be controlled by means of one or two additional wires with PWM system or digital control.
  • This system can control a high number
  • receivers inside of the drivers contained in the apparatuses can decode logic signals transmitted on the power supply line (conveyed wave systems) by specific power supplies/dimmers or can receive and decode signals radio- transmitted from a remote controller.
  • These systems can control a high number (>30) of apparatuses with the connection of the mere power supply wires, are compatible with existing installations, and the lamps, if desired, can be only switched on/off by interrupting the power supply (not by using the dimmering option).
  • these drivers in order to operate need at least three wires, two for the power-supplying and at least one for the PWM signal; this constitutes a marked limitation, especially so when it is desirable to replace the illuminating apparatuses in already laid classic installations, providing only the two power supply wires.
  • object of the present invention is to solve the above-mentioned problems, by proposing a system for lighting control of LED illuminating apparatuses as defined in independent claim 1. Further object of the present invention is to provide a method for lighting control of LED illuminating apparatuses as defined in independent claim 21.
  • the present invention entails several evident advantages.
  • the system according to the present invention provides a PWM- operating dimmer/power supply, power-supplying and controlling the illuminating apparatuses with dedicated drivers by means of the sole two power supply wires.
  • the system according to the present invention can control a high number (>30) of illuminating apparatuses. This leads to a remarkable simplification of the installation, by utilizing a PWM power system long-tested to date in several environments, demonstrating low sensitivity to disturbances.
  • connection circuit similar to that of a classic halogen lamp system (respecting polarities at connecting) with the apparatuses connected in parallel, with only the two power supply wires, that can be directly powered (OFF/ON) or connectible (even subsequently) to the dimmer/power supply, with the option of adding or removing illuminating apparatuses at will (respecting, when used, the maximum capacity of the dimmer/power supply).
  • FIG. 5 is a block diagram of a control system according to the present invention.
  • Figure 6 is a diagram in greater detail of the system of figure 5. To describe the present invention, hereinafter reference will be made to the above-indicated figures.
  • Figure 1 refers to a known system, in which power LEDs are connected thereamong in series and power-supplied via an individual driver/dimmer.
  • Figures 2 and 3 refer to known systems in which lighting control occurs via dedicated control lines, different from the power-supplying line.
  • Figure 4 refers to a known system, in which lighting is adjusted by means of ancillary signal receiving/transmitting devices, which may operate by radio and/or conveyed-wave technology.
  • the present invention is based on a control method described hereinafter.
  • a low-voltage DC power supply voltage is provided. From this power supply voltage it is generated a PWM-type control signal CS having a duty cycle settable between a minimum value P_MIN > 0% and a maximum value P_MAX ⁇ 100%. Then, it is generated a power supply signal for a LED illuminating apparatus such that its brightness/lighting may range between zero and a maximum value L_MAX depending on the duty cycle of the control signal CS.
  • the duty cycle of the control signal CS may range from 10% to 95%.
  • Such a control signal CS is then software-processed and utilized to generate a PWM output signal PWM_OUT whose duty cycle ranges between 0% and 100%, correspondingly to the duty cycle of the control signal CS.
  • the system 1 of the present invention comprises a low-voltage DC power supply module (e.g. 10-30 V, DC). Said module will not be described in detail, as considered of course within reach of a technician of average skill in the art.
  • a low-voltage DC power supply module e.g. 10-30 V, DC.
  • the system 1 further comprises an adjustment module 2 for the power supply voltage, i.e. a so-called dimmer.
  • the adjustment module 2 is manufactured in
  • the minimum value is selected at 10% T and the maximum value at 95% T.
  • the reason for such a selection will be better explained hereinafter.
  • the dimmer 2 comprises a first microprocessor unit 3 equipped with output devices, apt to execute a software for generating a PWM adjustment signal RS having a given duty cycle value corresponding to defined parameters.
  • the adjustment signal RS is input to an output stage 4 of the dimmer 2, which in turn outputs the control signal CS.
  • the output stage 4 comprises a device 5 for stabilizing the output signal CS that, preferably is of push-pull configuration type, allowing to keep the PWM-generated waveforms without big distortions even with line distances of the order of 50 meters with the power supply signal stable under both voltage levels.
  • the dimmer 2 could advantageously provide interface means 6 for setting such parameters and therefore defining the duty cycle of the adjustment signal RS.
  • Such interface means may be input devices, e.g. a keyboard or a remote control and a display, to allow a manual adjustment of the duty cycle by a user.
  • the interface means 6 can also comprise one or more input channels for the connection of sensors (twilight, presence or other) for an automatic adjustment of the duty cycle on the basis of data detected by the sensors themselves.
  • the system according to the present invention further comprises one or more drive modules 11 , again manufactured with PWM technology.
  • Each of said modules receives as input exclusively the control signal CS and is apt to drive a corresponding LED illuminating apparatus 100 in a manner such that its lighting may range from zero to a maximum value L_MAX, depending on the duty cycle of the control signal CS.
  • Each drive module 11 comprises an input stage 12 having a first rectifier module 13 and a leveling module 14.
  • the input stage 12 is powered by the control signal CS and apt to output a voltage signal V_PWR, substantially continuous and always having an amplitude > 0.
  • the rectifier module 13 is a diode, preferably a Schottky diode, whereas the leveling module 14 is of capacitive type.
  • the input diode 13, set in series to the power supply positive, allows energy to flow in only one direction, and therefore to preserve it in the capacitor 14 during a low transition of the input signal.
  • the capacity of the capacitor 14 should be sized in a manner such as to ensure correct operation of the drive module 11 throughout the variation of the duty cycle being input.
  • a Schottky diode was selected to attain the best possible energy flow, thanks to the low opening voltage.
  • the input stage 12 is always capable of delivering a voltage signal
  • V_PWR which is sufficient to power supply the entire drive module 11 , even with a
  • the voltage signal V_PWR is utilized to power supply the drive module 11 and in particular also a second microprocessor unit 15 which receives as input the control signal CS to be acquired in a digital format.
  • said signal is manipulated via a translator stage 16.
  • This stage receives as input the control signal CS, to adjust its level prior to inputting it to said second microprocessor unit 15.
  • the translator stage receives as input the control signal CS, to adjust its level prior to inputting it to said second microprocessor unit 15.
  • a voltage divider 17 preferably of resistive type, adjusting the amplitude of the control signal CS input to a subsequent filter 18 made with a Schmitt-trigger buffer.
  • a second filtering step is operated on the second microprocessor unit 15, which comprises means 20, preferably software, for filtering the acquired input signal.
  • the CPU 15 by means of a "Capture"-type input, meters frequency and duty of the input signal, at every transition of the same.
  • a software filtering reconstructs the signal also in case of presence of spikes, due to coupling disturbances on the power supply line.
  • read parameters are averaged and derived in a manner such as to stabilize the input signal, so that it be correctly interpreted by the CPU side.
  • the second microprocessor unit 15 further comprises software means 21 for processing the acquired input signal, apt to generate a PWM output signal PWM-OUT whose duty cycle ranges between 0% and 100% correspondingly to the duty cycle of the control signal CS, calculate, as described, on the acquired signal.
  • the PWM output signal is generated allowing for the setting of the minimum lighting of the spot, as a consequence of an input duty cycle equal to 10%.
  • This translation of the signal allows to always keep the drive module with a power supply level such as to have it operate normally for all lighting levels.
  • the spot sets the minimum lighting and with a duty equal to 95% the spot sets the maximum lighting.
  • each drive module 11 comprises a constant-current generator 30, which receives as input the PWM output signal PWM_OUT and outputs a constant-current power supply signal PWR-LED for power-supplying the LED illuminating apparatus
  • the value of the generated current, and therefore the lighting (brightness) of the LED/LEDs, is a function of the duty cycle of the PWM output signal PWM-OUT.
  • system according to the present invention may advantageously provide also a temperature control, carried out through a sensor placed in each illuminating apparatus, allowing to monitor the operating junction of the LEDs and optionally, in case of overheating, decrease the power supply current so as to safeguard the device life.

Landscapes

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

Abstract

L’invention concerne un système électronique permettant d’alimenter en courant et de commander l’éclairage d’appareils d’éclairage par DEL monochromatiques au moyen d’un circuit d’attaque à courant continu basse tension, tout particulièrement indiqué pour l’éclairage civil et maritime et la commande d’un grand nombre d’appareils d’éclairage (> 30), et permettant d’alimenter en courant et de commander des appareils d’éclairage par des circuits d’attaque spécialisés au moyen uniquement de deux fils d’alimentation en courant.
PCT/IT2008/000608 2008-09-24 2008-09-24 Système et procédé de commande de l’éclairage d’appareils d’éclairage par del WO2010035291A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2008/000608 WO2010035291A1 (fr) 2008-09-24 2008-09-24 Système et procédé de commande de l’éclairage d’appareils d’éclairage par del

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2008/000608 WO2010035291A1 (fr) 2008-09-24 2008-09-24 Système et procédé de commande de l’éclairage d’appareils d’éclairage par del

Publications (1)

Publication Number Publication Date
WO2010035291A1 true WO2010035291A1 (fr) 2010-04-01

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PCT/IT2008/000608 WO2010035291A1 (fr) 2008-09-24 2008-09-24 Système et procédé de commande de l’éclairage d’appareils d’éclairage par del

Country Status (1)

Country Link
WO (1) WO2010035291A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105163432A (zh) * 2015-08-24 2015-12-16 浙江大丰实业股份有限公司 一种舞台光效控制系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788451A (en) * 1983-03-14 1988-11-29 Hindrik Stoet AC voltage stabilizer easily convertible into uninterruptible power supply (UPS)
US20020060526A1 (en) * 2000-02-11 2002-05-23 Jos Timmermans Light tube and power supply circuit
US20050253533A1 (en) * 2002-05-09 2005-11-17 Color Kinetics Incorporated Dimmable LED-based MR16 lighting apparatus methods
US20080094423A1 (en) * 2004-08-20 2008-04-24 E-Light Limited Lighting System Power Adaptor
US20080122385A1 (en) * 2006-11-28 2008-05-29 Hon Hai Precision Industry Co., Ltd. Driving circuit for providing constant current

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4788451A (en) * 1983-03-14 1988-11-29 Hindrik Stoet AC voltage stabilizer easily convertible into uninterruptible power supply (UPS)
US20020060526A1 (en) * 2000-02-11 2002-05-23 Jos Timmermans Light tube and power supply circuit
US20050253533A1 (en) * 2002-05-09 2005-11-17 Color Kinetics Incorporated Dimmable LED-based MR16 lighting apparatus methods
US20080094423A1 (en) * 2004-08-20 2008-04-24 E-Light Limited Lighting System Power Adaptor
US20080122385A1 (en) * 2006-11-28 2008-05-29 Hon Hai Precision Industry Co., Ltd. Driving circuit for providing constant current

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105163432A (zh) * 2015-08-24 2015-12-16 浙江大丰实业股份有限公司 一种舞台光效控制系统

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