EP3549404A1 - Méthode et système pour gradateur de lumière sans scintillement sur un réseau de distribution électrique - Google Patents
Méthode et système pour gradateur de lumière sans scintillement sur un réseau de distribution électriqueInfo
- Publication number
- EP3549404A1 EP3549404A1 EP17876154.0A EP17876154A EP3549404A1 EP 3549404 A1 EP3549404 A1 EP 3549404A1 EP 17876154 A EP17876154 A EP 17876154A EP 3549404 A1 EP3549404 A1 EP 3549404A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit
- energy
- lamp
- led
- led lamp
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 33
- 230000005611 electricity Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 12
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims 1
- 230000004913 activation Effects 0.000 description 16
- 238000001514 detection method Methods 0.000 description 7
- 230000005355 Hall effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000750 progressive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- H05B45/12—Controlling the intensity 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
- H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
- H05B39/04—Controlling
- H05B39/041—Controlling the light-intensity of the source
- H05B39/044—Controlling the light-intensity of the source continuously
- H05B39/048—Controlling the light-intensity of the source continuously with reverse phase control
-
- 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
-
- 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
- H05B45/59—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits for reducing or suppressing flicker or glow effects
-
- 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
- H05B45/357—Driver circuits specially adapted for retrofit LED light sources
- H05B45/3574—Emulating the electrical or functional characteristics of incandescent lamps
- H05B45/3575—Emulating the electrical or functional characteristics of incandescent lamps by means of dummy loads or bleeder circuits, e.g. for dimmers
Definitions
- the present invention generally relates to systems and methods for altering and correcting the electrical signal of an AC voltage which influences the intensity of the illumination of an electronic lamp such as LED lamps ( LED) with or without control circuit.
- the invention also relates to any other areas of control application where segments of the electric wave from the power supply network are removed to control electrical equipment that regulates a function or process such as the speed of an electric motor.
- LED lamp manufacturers usually integrates electronic circuits to determine the conduction angle of the power supply to vary the light intensity.
- the luminous intensity of the LED lamp varies greatly for a very small amplitude variation of the electrical signal, especially near its ignition point. The result is that at low intensity, the slightest disturbance or variation of the electrical signal supplying the LED lamp creates stressful twinkling effects for humans and animals.
- a popular method for varying light intensity uses TRIAC control.
- the flickering of low-intensity lamps is often produced by the activation of the TRIAC trigger in the area where the amplitude of the electrical signal is below the conduction voltage of the LEDs or when the cumulative residual energy in the various electrical components is restored or superimposed on the mains voltage.
- This Disturbance is further amplified by the length of conductor that distributes energy to the lamps or when the number of lamps connected to the same source is large.
- the invention generally consists in creating a signal conditioner capable of filtering, converting, segmenting or generally producing a waveform originating from an electrical source into an electrical supply signal for an electrical apparatus, such as a LED lamp, so that the reading of the electrical signal that makes the device can achieve a function virtually free of variation induced by the fluctuations of the source.
- an active load rapidly absorbing the residual energy of the power line is applied when the conditioner cuts off power to the device.
- the energy dissipated by the active charge during the conduction phase is almost zero and is limited to the consumption of the electronic components which control this circuit.
- a method for eliminating flicker of one or more LED lamps on an electrical distribution network includes synchronizing the supply voltage of the electrical distribution network to zero, feeding the LED lamps when the mains voltage is above the lighting threshold of the LEDs of the lamp and cutting the power supply of the lamps. LED lamps.
- the method may also include, during the power failure, to empty the residual energy accumulated in the LED lamp.
- the LED lamp can also be activated by means of an electronic switch.
- the method may also include a step of pre-charging energy into the LED lamp before activating the LED lamp. Otherwise, the method also includes the rectification of the power supply to store said energy in capacitors in order to restore energy in a controlled manner to the LED lamps.
- the energy recovery can take the form of a sinusoidal wave, a trapezoidal wave and / or a complex cyclic wave that varies temporally.
- the method comprises detecting the intensity of the light emitted by the LED lamp and according to the intensity of the light emitted by the LED lamp, controlling the voltage sent to the lamp at LED to obtain a predetermined and stable light intensity.
- a system for eliminating flicker of one or more LED lamps on an electrical distribution network generally comprises at least one switch connected to the LED lamp, an active draining circuit of the current, a controller configured to synchronize with the zero crossing of the supply voltage of the electrical distribution network, the controller being configured to close the switch when the mains voltage is above the threshold of the LED lighting of the lamp, open the switch to turn off the LED lamp according to the intensity required and activate the drainage circuit.
- the controller can also be configured to activate the drain circuit when the switch opens.
- the system may also comprise a circuit for detecting the zero crossing of the electric wave connected to the controller and / or a feedback circuit for correcting the output signal supplying the LED lamp.
- the feedback circuit may include a light intensity detector. This light intensity detector may be an optical detector configured to convert the light emitted by the lamp into an electrical signal proportional to the light intensity.
- the system also comprises a current limiting circuit and / or a rectifying system of the power supply.
- the power supply rectifying system may include one or more capacitors configured to store energy and restore it in a controlled manner to the LED lamps.
- the capacitor (s) may be configured to render the energy in the form of a sine wave, a trapezoidal wave, and / or a time-varying complex cyclic wave.
- the system may include an overload protection circuit, a short circuit protection circuit and / or a current meter connected to the LED lamp.
- FIG. 1 illustrates the summary of the invention.
- FIG. 2 illustrates the block diagram of the electronic circuit powered by an alternating voltage of the electrical network.
- FIG. 3 illustrates the block diagram of the electronic circuit powered by a DC full-wave voltage.
- Figure 4 illustrates the zero crossing detection circuit of the mains power supply.
- FIG. 5 illustrates the switching circuit powered by an alternating voltage of the electrical network.
- Figure 6 illustrates the switching circuit powered by a DC full-wave voltage.
- Figure 7 illustrates the active ⁇ bleeder> circuit powered by an AC voltage of the electrical network.
- Figure 8 illustrates the active ⁇ bleeder> circuit powered by a DC full-wave voltage.
- FIG. 9 illustrates the circuit for protection against overloads.
- Figure 10 illustrates the short circuit detection circuit at startup.
- Figure 11 illustrates the optical feedback circuit for stabilizing the light intensity.
- Figure 12 illustrates the trailing edge control mode.
- FIG. 13 illustrates the "leading edge” type of control mode.
- FIG. 14 illustrates the central band type control mode.
- Figure 15 illustrates the off-center band control mode.
- Figure 16 illustrates the comb type control mode.
- FIG. 17 illustrates the dual-band type control mode.
- FIG. 18 illustrates the charge advance type control mode.
- the system 2 here called the conditioner 2, receives a power supply from an alternative source 1.
- the conditioner applies transformations to the electric wave to return it to a device 4.
- the device 4 can be a lamp, a motor or any other apparatus which converts the electrical signal of its power supply into any function such as light, a driving force, a movement, etc.
- the circuit illustrated in Figure 2 typically operates with AC voltage AC where the current flowing in the switch 6 is bidirectional.
- the second circuit illustrated in FIG. 3 has a diode bridge 3a which rectifies the alternating voltage of the network in a waveform with a double wave where the current flowing in the switch 6 is unidirectional.
- the filtration and protection circuit 5 upstream aims to protect the electronic components against network overvoltages and aims to limit the emissions conducted on the power grid.
- a zero voltage detection circuit 10 of the mains voltage allows the main controller 11 to synchronize on each cycle start of the mains voltage.
- a set of brightness produced by a user interface or by an external electrical circuit activates a sequence of activation of the switch 6 as a function of time to allow the intensity of the LED lamps 4 to be controlled.
- a "snubber" type circuit 8 enables to absorb the energy stored in the inductance of the wiring of the LED lamp network and protects the switch 6 against overvoltages.
- An active “bleeder” circuit 9 makes it possible to empty or drain the energy of the "snubber” type circuit 8 as well as the residual energy stored in the components of the LED lamp array in order to guarantee a precise and controlled transition of switching off the switch 6.
- the system may comprise an overcurrent protection circuit 12 and short-circuit protection at startup 13 typically implanted using, for example, a current-voltage converter 7.
- This type circuit 13 generally protects the electronic and electrical components of the control circuit against current overload and limits the heat dissipation of the components.
- the system may also comprise a detection circuit, here expressed by a light intensity detector 14, generally intended to allow feedback to correct the output signal supplying, in this example, the LED lamps.
- FIG. 5 an incarnation of a main switching circuit of the AC lamp control circuit AC is presented.
- Figure 6 illustrates a circuit similar to the main switching circuit of Figure 5 but having DC power from a full-wave rectified wave.
- the circuit typically comprises a main controller 11 configured to control the activation of the switch 5c and / or 6c via a circuit with galvanic isolation 5a and MOSFET control circuits 5b and / or 6b.
- optical isolators 5a and / or 6a may be used in this circuit.
- other components such as magnetic, capacitive, "hall effect” or RF isolators could be used.
- Switch 5c and / or 6c may comprise one or more MOSFETs and / or other components such as bipolar transistors or IGBTs.
- MOSFETs mounted or connected in parallel is also possible and allows a power switch to very low resistance which can significantly reduce power loss.
- Such a switching circuit generally aims to reduce the size of the heat sink to remove it if the equivalent thermal resistance allows.
- the circuit 14 is generally composed of an optical detector 11a.
- the optical detector 11a generally converts the light emitted by the LED lamps into an electrical signal proportional to the light intensity.
- the electrical signal is then amplified by a transimpedance amplifier 11b to an acceptable level to be converted to a digital value by the analog-to-digital converter 1d.
- a photodiode 11a is used in this incarnation of the circuit 14.
- other optical converters such as a phototransistor, a photocell or a solar cell could also be used .
- the analog-to-digital converter l ld could be replaced by a pulse width modulated oscillator (PWM) controlled by the output of the amplifier 1 lb and coupled to a logic input of the main controller 11 .
- PWM pulse width modulated oscillator
- the "bleeder” active 9 is generally intended to absorb some of the residual energy restored by the inductance of wiring LED lamps that is stored in the "snubber” 8 and the residual energy also from other electronic components on the line. This absorption typically allows a more frank break of each activation cycle of the switch 6 and generally prevents this energy is consumed by the lamps.
- One or more clean cuts during each cycle of the network aims to control well the LED lamps which have wavefront time detection circuits as control signals in "dimmer" mode.
- FIG. 7 an embodiment of an active "bleeder” circuit 9 AC AC is presented.
- Figure 8 for its part, illustrates another incarnation of the circuit 9 of Figure 7 but in DC mode rectified double alternation.
- the active "bleeder” circuit 9 typically comprises a resistive load 7d and / or 8d which is engaged in parallel with the LED lamps with a switch 7c8c when the switch 6 is open.
- MOSFETS 7c and / or 8c may be used to activate the resistive load 7d and / or 8d.
- other components such as bipolar transistors or IGBTs may be used in this circuit 9.
- the main controller 11 controls the activation of the switch 7c and / or 8c via a circuit with galvanic isolation 7a and / or 8a and MOSFET control circuits 7b and / or 8b.
- a circuit with galvanic isolation 7a and / or 8a and MOSFET control circuits 7b and / or 8b As a preference only, optical isolators 7a and / or 8a may be used in this circuit 9 but other components such as magnetic, capacitive, "hall effect” or RF isolators may be substituted.
- the The activation sequence of the switch 6 and the switch 7c and / or 8c may be 180 degrees out of phase but may also include a different sequence which allows better control of the LED lamps.
- a current limiting circuit 12 comprising an integrator generally allows to remove the fuse and protect the power switches 6 against excessive loads.
- An embodiment of the current limiter circuit 12 is illustrated in FIG. 9 and may in particular operate in ac mode or in continuous current mode with a double alternating rectified wave.
- the measurement of the current in the switch 6 is typically done using a current-voltage converter 7, preferably a low value resistor.
- the current measuring circuit 7 may also include a current transformer or a "hall effect" sensor.
- the output of the current converter 7 is generally directed to an amplifier 9b whose output drives a variable current source 9c whose intensity is proportional to the current flowing in the switch 6.
- a current integrator formed by the current source 9c the capacitor 9d and the switch 9e make it possible to integrate the waveform of the current flowing in the circuit of the LED lamps.
- the output of the integrator is compared to a reference voltage using the comparator 9f.
- An overshoot on the comparator 9f will cut the power of the LED lamps using the switch 6. This cut aims to protect the electronic components.
- the zero crossing of the power supply discharges the charge of the capacitor 9d.
- the current limiting circuit 12 is typically galvanically isolated using galvanic isolating circuit 9a.
- the circuit 12 may comprise optical isolators (9a) or other components such as magnetic insulators, capacitive, "hall effect" or RF.
- the circuit 12 could also include an alarm indicating an overhead directed to the main controller 11 to be processed.
- a short circuit protection circuit at startup 13 generally avoids overloading the electrical and electronic components in case of bad connection of the user.
- a preferred incarnation of a protection circuit 13 is illustrated in FIG. 10 and operates, in particular, in AC or DC mode with a full-wave rectified wave.
- the measurement of the current in the switch 6 is typically done using a current-voltage converter 7, preferably a low value resistor. Without being limited thereto, the current measurement circuit 7 may also include a current transformer or a "hall" sensor. effect ".
- the output of the current converter 7 is generally directed to an amplifier 10b followed by a comparator 10c and a flip-flop D 10d.
- the maximum intensity of the current flowing in the switch 6 is typically limited by the opening of the switch 6 when there is an overrun on each half-cycle of the alternating mode network voltage or on each half-cycle of the mains voltage rectified in full-wave mode.
- the zero crossing of the power supply resets the flip-flop D 10d.
- the short-circuit protection circuit 13 is generally electrically isolated using an optical isolator circuit 10a.
- optical isolators 10a are used in this circuit.
- other components such as magnetic, capacitive, "hall effect” or RF isolators may be used.
- An alarm indicating a short circuit on startup can be directed to the main controller 11 for processing.
- the detection of the zero crossing of the power supply 10 is done with a level detector having a clear and precise discrimination of the network voltage.
- An embodiment of the zero crossing detection circuit 10 is illustrated in FIG. 4.
- the supply voltage of the AC network charges a capacitor 4c at a limit voltage determined by the clipping circuit 4b.
- the comparator 4d is activated when the mains voltage generally drops below the threshold determined by the reference voltage accumulated in the capacitor 4c. Without being limited thereto, the output of the comparator 4d may activate the LED of the galvanic isolator 4a which transmits the zero crossing signal to the main controller 11.
- the circuit 10 may also include an optical isolator. In other incarnations, circuit 10 could include other components such as magnetic, capacitive, "hall effect” or RF isolators.
- the activation of the switches 6 can be out of phase by a few microseconds in order to aim to reduce the demand for instantaneous energy from the electrical network and thus reduce the voltage drop. which can influence the behavior of the load 4.
- configurations make it possible to eliminate flickering of LED lamps due to fluctuations in the power supply of the electrical network by rectifying the power supply and storing it in capacitor banks. in order to restore it to the lamps in a controlled way.
- the electrical restitution can then take different forms including, for example, a constant voltage, a sinusoidal shape whose peak amplitude and frequency are controlled, a trapezoidal modulation that allows a better intensity constant than the sinusoidal shape while maintaining slow transitions that reduce conducted emissions and electromagnetic radiation.
- the proposed rendering circuit consists of an ON / OFF modulator whose useful cycle (PWM) varies temporally throughout the cyclic period. This waveform is then filtered using a passive or active low-pass filter to conserve the DC component. The variation in the duty cycle modulates the amplitude of the DC component to form a complex cyclic wave that is transmitted to the LED lamp circuit.
- PWM useful cycle
- control method generally aims to offer several advantages, among which, in many cases, a better functional stability at low intensity of the apparatus 4 and a lower current draw than in the central band mode (FIG. leading-edge "( Figure 13).
- the control method generally consists in setting the instant of activation of the electronic switch 6 when the AC voltage reaches a predetermined amplitude in the modus operandi of the device.
- the amount of energy transmitted to the apparatus 4 is generally determined by the duration of the activation of the electronic switch 6.
- the progressive increase in energy is typically transferred to the apparatus and in the following way: at the minimum value, the activation of the electronic switch is for example in N2 and deactivation in N3. Then gradually, from N2 to N4, from N2 to N5, until the conduction window reaches N2 to N8. After that, the increase is continued by increasing the conduction period from NI to N8. The transmission of energy is total when the conduction is from (N0) to N8.
- the regression of transmitted energy is the inverse of the progression: (N0) to N8, N1 to N8, N2 to N8, N2 to N7, N2 to N6, to the minimum conduction time of N2 at N3.
- the time interval between N0, N1, N2 ... N8 is suggestive only and is adapted to the target device.
- the control algorithm can allow multiple cycles to switch each segment in the conduction area of the LEDs. As illustrated in FIG. 17, the activation can first be done at PI when the mains voltage exceeds the predetermined threshold of the first series of LEDs. The intensity is then gradually increased by delaying the first cut P2.
- the control algorithm can allow a progressive loading of the capacitive input reactance of the lamp using a front progressive amount which limits the charging current during the rise time of the voltage.
- the activation of the first cycle is first in Dl at the zero crossing of the network voltage and ends in D2 below the activation threshold of the LEDs.
- the time interval between D1 and D2 is dedicated to the charge of the capacitive reactance of the lamp, in this interval, the luminous intensity of the lamp is zero.
- a second conduction cycle is triggered when the grid voltage is higher than the conduction voltage of the LEDs, this cycle enables activation of the LED segment of the lamp.
- the starting point of the LED segment is located at D3 and its intensity is controlled by the cycle time starting at D3 and ending at D4.
- the increase in luminous intensity is generally progressively increased by increasing the duration of the conduction of the second cycle until reaching point D5.
- Activation of the charge cycle of the capacitive reactance is preferably made at the zero crossing of the mains voltage, but may also be activated at any time in the range D1 to D2.
- the method makes it possible to carry out, without being limited to, all the forms presented using preprogrammed modes in order to produce the waveform adapted to the circuit of the lamp and to the topology of the installation. .
- the method makes it possible to define any particular waveform formed from the voltage of the electrical sector.
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2950054A CA2950054A1 (fr) | 2016-11-30 | 2016-11-30 | Methode et systeme pour gradateur de lumiere sans scintillement sur un reseau d'alimentation alternatif |
PCT/CA2017/051444 WO2018098583A1 (fr) | 2016-11-30 | 2017-11-30 | Méthode et système pour gradateur de lumière sans scintillement sur un réseau de distribution électrique |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3549404A1 true EP3549404A1 (fr) | 2019-10-09 |
EP3549404A4 EP3549404A4 (fr) | 2020-05-27 |
EP3549404B1 EP3549404B1 (fr) | 2021-08-18 |
Family
ID=62239842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17876154.0A Active EP3549404B1 (fr) | 2016-11-30 | 2017-11-30 | Méthode et système pour gradateur de lumière sans scintillement sur un réseau de distribution électrique |
Country Status (4)
Country | Link |
---|---|
US (1) | US11723125B2 (fr) |
EP (1) | EP3549404B1 (fr) |
CA (3) | CA2950054A1 (fr) |
WO (1) | WO2018098583A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110086083B (zh) * | 2019-04-09 | 2020-11-03 | 苏州佳世达光电有限公司 | 投影机的功率控制电路 |
CN111385940A (zh) * | 2020-05-04 | 2020-07-07 | 上海欧切斯实业有限公司 | 0-10v反向调光led驱动电路 |
TWI814339B (zh) * | 2022-04-13 | 2023-09-01 | 台達電子工業股份有限公司 | 照明裝置 |
CN116951341A (zh) | 2022-04-13 | 2023-10-27 | 台达电子工业股份有限公司 | 照明装置 |
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US9883560B2 (en) * | 2015-09-25 | 2018-01-30 | Osram Sylvania Inc. | Controller for a phase cut dimmable LED driver |
US9907132B2 (en) * | 2015-10-29 | 2018-02-27 | Abl Ip Holding Llc | Lighting control system for independent adjustment of color and intensity |
US10531531B2 (en) * | 2016-01-06 | 2020-01-07 | Dialog Semiconductor Inc. | Digital dimming solution for LED applications including a phase-cut dimmer |
US9655178B1 (en) * | 2016-02-03 | 2017-05-16 | Ketra, Inc. | Device and method for removing transient and drift from an AC main supplied to a DC-controlled LED load |
US20190132921A1 (en) * | 2017-10-31 | 2019-05-02 | Fulham Company Limited | Led dimming using switch mode power supply control loop parameter modification |
-
2016
- 2016-11-30 CA CA2950054A patent/CA2950054A1/fr not_active Abandoned
-
2017
- 2017-11-30 US US16/465,440 patent/US11723125B2/en active Active
- 2017-11-30 WO PCT/CA2017/051444 patent/WO2018098583A1/fr active Search and Examination
- 2017-11-30 CA CA3045546A patent/CA3045546C/fr active Active
- 2017-11-30 EP EP17876154.0A patent/EP3549404B1/fr active Active
- 2017-11-30 CA CA3114573A patent/CA3114573A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
CA3045546C (fr) | 2021-05-11 |
CA3114573A1 (fr) | 2018-06-07 |
CA2950054A1 (fr) | 2018-05-30 |
WO2018098583A1 (fr) | 2018-06-07 |
EP3549404B1 (fr) | 2021-08-18 |
US20200008278A1 (en) | 2020-01-02 |
US11723125B2 (en) | 2023-08-08 |
EP3549404A4 (fr) | 2020-05-27 |
CA3045546A1 (fr) | 2018-06-07 |
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