EP4072246A1 - Betätigungsvorrichtung für beleuchtungsmittel - Google Patents

Betätigungsvorrichtung für beleuchtungsmittel Download PDF

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Publication number
EP4072246A1
EP4072246A1 EP21166894.2A EP21166894A EP4072246A1 EP 4072246 A1 EP4072246 A1 EP 4072246A1 EP 21166894 A EP21166894 A EP 21166894A EP 4072246 A1 EP4072246 A1 EP 4072246A1
Authority
EP
European Patent Office
Prior art keywords
operating device
voltage
signal
circuitry
lighting means
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.)
Pending
Application number
EP21166894.2A
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English (en)
French (fr)
Inventor
Christian Nesensohn
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and Co KG
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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Priority to EP21166894.2A priority Critical patent/EP4072246A1/de
Priority to CN202210299592.6A priority patent/CN115209590A/zh
Publication of EP4072246A1 publication Critical patent/EP4072246A1/de
Pending 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]
    • H05B45/10—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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • 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
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits

Definitions

  • the invention is, generally, in the area of operating devices for lighting means, which are controllable by means of NFC communication.
  • NFC Near Field Communication
  • modules can be used for configuring LED drivers or other operating devices for lighting means.
  • a control circuitry of the LED driver or operating device such as a microcontroller, can be used in order to communicate with the NFC module.
  • NFC modules to translate a configuration signal for the LED driver into a pulse-width-modulated signal (e.g., representing an LED current) which can be fed to an integrated control circuit of the LED-driver without the need of further intelligence, such as an extra control circuitry or microcontroller.
  • a pulse-width-modulated signal e.g., representing an LED current
  • such NFC modules convert a NFC signal into a PWM signal via an integrated circuitry on the NFC module, wherein the duty cycle of the PWM signal reflects the wirelessly received signal.
  • a control circuitry for operating devices for lighting means can comprise a programming input pin, at which such analog DC voltage may be supplied in order to input a nominal value for the current through the lighting means, especially through an LED load.
  • the nominal current for LEDs may be programmed.
  • DC level feature which allows to detect and distinguish between an AC and a DC supply voltage. It is, however, difficult to implement such a DC level feature in an operating device without making use of additional intelligence.
  • the invention relates to an operating device for lighting means, comprising: output terminals supplying lighting means, such as e.g. a LED load, a control circuitry for controlling the electrical supply of the lighting means, a NFC module configured to receive NFC signals and output a pulse width modulation, PWM, signal with variable duty cycle, a conversion circuitry arranged for being supplied with the PWM signal and for outputting a DC voltage supplied to an input of the control circuitry.
  • the DC voltage is a function of the duty cycle of the PWM signal according to a set conversion rate and the conversion circuitry is configured to be supplied with an internal or external control signal to set at least two conversion rates.
  • the control circuitry may be a microcontroller.
  • the control signal may comprise an AC or DC voltage signal.
  • control circuitry is configured to map the level of the supplied DC voltage into a nominal current for the LED load and to control the operation of the lighting means, e.g. by controlling a switch operation of at least one switch of a switched converter such that an actual current matches the nominal current.
  • the conversion rate can be varied continuously or incrementally in steps by said control signal.
  • the conversion circuitry comprises a R-C low pass filter configured to convert the PWM signal into the DC voltage.
  • the operating device comprises a detection circuitry configured to detect if a supply voltage of the operating device is an AC or DC voltage and to set the control signal for the conversion rate differently in case of the presence of an AC or DC signal, respectively.
  • the operating device has a DC level feature, i.e. it can detect whether a mains voltage is an AC or a DC voltage.
  • a detection of a DC signal such as from a battery inside the operating device
  • the output current of the operating device for lighting means e.g., LED driver
  • the detection circuitry comprises a voltage divider or a R-C low pass filter or a capacitor.
  • the operating device comprises a limiting circuitry configured to limit the DC voltage in case the detected control signal is a DC signal.
  • the limiting circuitry comprises a Zener diode configured to clamp the DC signal.
  • the limiting circuitry comprises a switch configured to switch if the control signal is a DC signal.
  • the switch is configured to switch on a connection between the detection circuitry and the limiting circuitry.
  • the NFC module is configured to program a nominal current of the LED load.
  • the invention relates to a system comprising a NFC transmitting handheld device and an operating device according to the first aspect or any one of the implementation forms thereof.
  • the invention relates to a method for operating a device for lighting means, comprising: supplying lighting means, such as LED load, by output terminals; controlling the electrical supply of the lighting means; receiving NFC signals; outputting a pulse width modulation, PWM, signal with variable duty cycle; supplying a conversion circuitry with the PWM signal; outputting a DC voltage supplied to an input of a control circuitry, wherein the DC voltage is a function of the duty cycle of the PWM signal according to a set conversion rate, wherein the conversion circuitry is configured to be supplied with an internal or external control signal to set at least two conversion rates.
  • LED luminaire shall mean a luminaire with a light source comprising one or more LEDs or OLEDs. LEDs are well-known in the art, and therefore, will only briefly be discussed to provide a complete description of the invention.
  • the aspect of the present invention might contain integrated circuits that are readily manufacturable using conventional semiconductor technologies, such as complementary metal-oxide semiconductor technology, short "CMOS".
  • CMOS complementary metal-oxide semiconductor technology
  • the aspects of the present invention may be implemented with other manufacturing processes for making optical as well as electrical devices.
  • Fig. 1 shows a schematic representation of an operating device 400 for lighting means 408 according to an embodiment.
  • the operating device 400 for lighting means 408 can be fed with an AC or DC voltage at the input terminals 401a and 401b.
  • the operating device 400 for lighting means 408 comprises: output terminals 407a, 407b supplying lighting means 408, such as e.g. a LED load, a control circuitry 404 for controlling an electrical supply of the lighting means 408; a NFC module 406 configured to receive NFC signals and output a pulse width modulation, PWM, signal with variable duty cycle; a conversion circuitry 405 arranged for being supplied with the PWM signal and for outputting a DC voltage supplied to an input of the control circuitry 404.
  • the DC voltage is a function of the duty cycle of the PWM signal according to a set conversion rate, and the conversion circuitry 405 is configured to be supplied with an internal or external control signal to set at least two conversion rates.
  • the internal or external control signal can comprise an AC or DC voltage signal.
  • the operating device 400 can comprise a detection circuitry 402 configured to detect if a supply voltage of the operating device is a AC or DC voltage and to set the control signal for the conversion rate differently in case of the presence of a AC or DC signal, respectively.
  • the operating device 400 can comprise a limiting circuitry 403 configured to limit the DC voltage in case the detected control signal is a DC signal.
  • the NFC module 406 can be configured to translate a current configuration into a pulse-width-modulation (PWM) signal which, then, can be filtered and used as current selection information for a LED control integration circuit or control circuitry 404.
  • PWM pulse-width-modulation
  • the output current of the LED driver or operating device 400 can be reduced, so that, for example, a battery inside the LED driver or operating device 400 can last longer, for example, in emergency situations.
  • Fig. 2 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 2 shows a NFC module 406 (antenna and processing circuitry) connected to a voltage divider 500 which is connected to a low pass R-C filter 501.
  • the R-C filter 501 forms the conversion circuitry 405.
  • a dim voltage Vdim at the output of the R-C filter 501 can depend on the duty cycle of the PWM signal.
  • the pulse-width-modulation (PWM) of the input signal of the NFC module 406 correlates linearly with the set LED current.
  • the frequency of the PWM signal can be in the range of 1 kHz - 30 kHz, while the PWM voltage levels can be in the range of 0 V - 2,8 V.
  • an analog signal can be obtained.
  • an AC/DC signal is provided as input to the limiting circuitry 403 and the voltage divider 500 comprising two resistors is connected to the NFC module 406 and the R-C filter 501.
  • the module 502 of the operating device 400 can comprise the control circuitry 404 (not shown in Fig. 2 ) .
  • the operating device 400 can be adapted to operate in different configurations: either a high level of the PWM signal at the output of the NFC module 406 can be adapted depending on the supply signal (configuration options 1a and 1b), or a filtered analog signal at the output of the R-C low-pass filter 501 can be adapted (configuration option 2a and 2b) depending on the supply signal.
  • the supply signal may refer to the supply voltage of the operating device 400.
  • the high level of the PWM signal at the output of the NFC module 406 is adapted via the voltage divider 500, which divides the voltage in case of a DC supply signal. In case of an AC supply signal, the voltage is not divided.
  • Fig. 3 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 3 shows a circuitry similar to the one shown in Fig. 2 .
  • a Zener diode 600 is added to the circuitry, and an AC/DC voltage is given as input to the Zener diode 600.
  • the high level of the PWM signal at the output of the NFC module 406 is adapted via the Zener diode 600.
  • the voltage In case of a DC voltage, the voltage is clamped by the Zener diode 600, while in case of an AC voltage, the voltage is not clamped.
  • Fig. 4 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 4 shows a circuitry similar to the circuitry of Fig. 2 , wherein the voltage divider 500 is added at the output of the R-C low pass filter 501, instead of at the output of the NFC module 406.
  • the analog signal at the output of the R-C filter is adapted by the voltage divider 500. In case of a DC input voltage, the voltage is divided, while in case of an AC voltage, the voltage is not divided.
  • Fig. 5 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 5 shows a circuitry similar to the one of Fig. 2 , wherein a Zener diode 600 is added to the circuit at the output of the R-C low pass filter 501.
  • the filtered analog signal at the output of the R-C low pass filter is adapted via the Zener diode 600.
  • the voltage is clamped, while in case of AC input voltage, the voltage is not clamped.
  • Fig. 6 shows a schematic representation of PWM signals and voltage signals in the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 6 shows the effect of the DC level feature of the operating device 400 in case of an AC supply signal.
  • the PWM NFC signal at the output of the NFC module 406 is shown in case of the configuration options 1a, 1b, 2a and 2b on the upper panel (case “PWM NFC chip out”).
  • the PWM signal at the RC-filter input is shown on the middle panel for the configuration options 1a, 1b, 2a and 2b (case "PWM RC-filter in”).
  • Vdim or DC voltage namely the voltage at the output of the R-C low-pass filter 501, is shown as a function of the duty-cycle of the PWM signal on the lower panel for the configuration options 1a, 1b, 2a and 2b (case “Vdim vs. duty-cycle").
  • the voltage Vdim or DC voltage does not change in any configuration option.
  • the DC level or conversion rate can be set in the range of 0-100% dim level, while in other devices it can be fixed at, e.g., 70% of dim level.
  • Fig. 7 shows a schematic representation of PWM signals and voltage signals in the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 7 shows the effect of the DC level feature of the operating device 400 in case of a DC supply signal.
  • the PWM NFC signal at the output of the NFC module 406 is shown for all configuration options 1a, 1b, 2a and 2b on the upper panel (case “PWM NFC chip out”).
  • the PWM signal at the input of the RC-filter 501 is shown on the middle panel for the all configuration options 1a, 1b, 2a and 2b (case "PWM RC-filter in”). As it can be taken from Fig. 7 , in this case, the DC voltage level is lowered at the input of the PWM R-C filter 501 for the configuration options 1a and 1b.
  • the dimmed voltage Vdim or DC voltage namely the voltage at the output of the R-C low-pass filter 501
  • Vdim vs. duty-cycle the dimmed voltage or DC voltage as a function of the duty-cycle of the PWM signal reaches its highest value, namely the DC voltage level.
  • the voltage Vdim is influenced by connecting a voltage divider 500 or a Zener diode 600 by a switch if, e.g., a DC mains voltage is applied. Therefore, a circuit can be implemented in order to switch in case of a DC mains, as it will be described with reference to the following figures.
  • Fig. 8 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • the operating device 400 for lighting means 408 comprises the detection circuitry 402, the limiting circuitry 403 and a rectifying bridge 1105.
  • the detection circuitry 402 comprises two rectifying diodes 1101, a voltage divider 1100, a R-C filter 1102 and a capacitor 1103.
  • the input voltage comes from the L and N wires, wherein the input voltage is rectified by the rectifying bridge 1105.
  • the limiting circuit 403 comprises a switch 1104.
  • the time constant of the R-C filter is much longer than 10 ms and the switch 1104, e.g. FET, does not switch. This can also be seen in the plot of the threshold value th 1106 which is higher than the voltage value which allows for the switch 1104 to switch.
  • Fig. 9 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • the capacitor 1103 is charged according to the time constant of R-C low-pass filter and the switch 1104 FET switches. This can also be seen in the plot of the threshold value th 1106 which is lower than the voltage value which allows for the switch 1104 to switch.
  • Fig. 10 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 10 shows a circuitry analogous to the one of Fig. 8 and Fig. 9 , besides that the detection circuitry 402 does not comprise the rectifying diodes 1101. Moreover, in this embodiment, only the L wire is sensed. This provides the advantage that sensing only L is cheaper.
  • the time constant of the R-C low-pass filter 1102 is much longer than 20 ms, and the switch 1104 FET does not switch. This can also be seen in the plot of the threshold value th 1106 which is higher than the voltage value which allows for the switch 1104 to switch.
  • Fig. 11 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 11 shows a circuitry analogous to the one shown in Fig. 10 .
  • the capacitor 1103 is charged according to the time constant of the R-C low-pass filter 1102 and the switch 1104 FET switches. This can also be seen in the plot of the threshold value th 1106 which is lower than the voltage value which allows for the switch 1104 to switch.
  • Fig. 12 shows a schematic representation of the operating device 400 for lighting means 408 according to an embodiment.
  • Fig. 12 shows a selection of some of the elements which can be comprised in the operating device 400 for lighting means 408 according to an embodiment.
  • the operating device 400 in Fig. 12 comprises the detection circuitry 402, the limiting circuitry 403, the conversion circuitry 405, the NFC module 406 and a rectifying bridge 1105.
  • the signal coming from the L and N wires is given as input to the detecting circuitry 402.
  • the detecting circuitry 402 can comprise two rectifying diodes 1101, a voltage divider 1100, a R-C low pass filter 1102 and a capacitor 1103.
  • the limiting circuity 403 can comprise a switch 1104 and a Zener diode 600.
  • the switch 600 is configured to switch if the input signal or control signal is a DC signal.
  • the NFC module 406 comprises an NFC antenna which transmits a signal to the unit 406a which, in turn, converts the received signal into a PWM signal.
  • the PWM signal is given as input signal to the conversion circuitry 405.
  • the conversion circuitry 405 comprises the R-C low-pass filter 501.
  • the output signal of the R-C filter 501 is given as input to the module 502 which comprises the control circuitry 404 (not shown in Fig. 12 ).
  • Fig. 12 shows an example of a limiting circuitry 403 for a DC level or conversion rate of 70%.
  • the configuration option 2b of influencing the Vdim signal or DC voltage via the Zener 600 at the R-C low-pass filter 501 output and the configuration option 1a and 1b of detecting the DC voltage and switching via sensing L and N are used.
  • the high level of the PWM signal output of the NFC module 406 is influenced in such a way, that the resulting analog signal at the output of the R-C low pass filter 501 is relating to a DC dim level relatively to the selected LED current or the current of the operating device 400 via the NFC module 406.
  • Fig. 13 shows a schematic representation of a method 1600 for operating a device 400 for lighting means 408 according to an embodiment.
  • the method 1600 comprises the steps of:

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP21166894.2A 2021-04-06 2021-04-06 Betätigungsvorrichtung für beleuchtungsmittel Pending EP4072246A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21166894.2A EP4072246A1 (de) 2021-04-06 2021-04-06 Betätigungsvorrichtung für beleuchtungsmittel
CN202210299592.6A CN115209590A (zh) 2021-04-06 2022-03-25 用于照明装置的操作设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21166894.2A EP4072246A1 (de) 2021-04-06 2021-04-06 Betätigungsvorrichtung für beleuchtungsmittel

Publications (1)

Publication Number Publication Date
EP4072246A1 true EP4072246A1 (de) 2022-10-12

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EP21166894.2A Pending EP4072246A1 (de) 2021-04-06 2021-04-06 Betätigungsvorrichtung für beleuchtungsmittel

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EP (1) EP4072246A1 (de)
CN (1) CN115209590A (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080110A1 (en) * 2009-10-07 2011-04-07 Lutron Electronics Co., Inc. Load control device for a light-emitting diode light source
US20200313727A1 (en) * 2019-04-01 2020-10-01 Doris Keitel-Schulz Power regulation for lighting using nfc
US20210068226A1 (en) * 2019-03-08 2021-03-04 Abl Ip Holding Llc Lighting fixture controller for controlling color temperature and intensity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110080110A1 (en) * 2009-10-07 2011-04-07 Lutron Electronics Co., Inc. Load control device for a light-emitting diode light source
US20210068226A1 (en) * 2019-03-08 2021-03-04 Abl Ip Holding Llc Lighting fixture controller for controlling color temperature and intensity
US20200313727A1 (en) * 2019-04-01 2020-10-01 Doris Keitel-Schulz Power regulation for lighting using nfc

Also Published As

Publication number Publication date
CN115209590A (zh) 2022-10-18

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