WO2013104684A1 - Contrôleur de lampe - Google Patents

Contrôleur de lampe Download PDF

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Publication number
WO2013104684A1
WO2013104684A1 PCT/EP2013/050321 EP2013050321W WO2013104684A1 WO 2013104684 A1 WO2013104684 A1 WO 2013104684A1 EP 2013050321 W EP2013050321 W EP 2013050321W WO 2013104684 A1 WO2013104684 A1 WO 2013104684A1
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
colour
switch
output
led
Prior art date
Application number
PCT/EP2013/050321
Other languages
English (en)
Inventor
Ian Wilson
Original Assignee
Tridonic Gmbh & 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 & Co Kg filed Critical Tridonic Gmbh & Co Kg
Publication of WO2013104684A1 publication Critical patent/WO2013104684A1/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]
    • H05B45/20—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
    • H05B47/155—Coordinated control of two or more light sources
    • 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 lamp control system for use in a lighting system comprising a lamp and a user-operated switch for controlling operation of the lamp, and a corresponding method.
  • dimming and colour control is usually provided by a separate control line for transfer of dimming and colour information, e.g. value of the dimming level or colour, to the LED lamp.
  • dimming and colour information e.g. value of the dimming level or colour
  • this is not possible, because the necessary control lines are not present, and there is only a two-wire connection to the lamp.
  • arrangements are known which can be switched by a certain switching sequence in two discrete light modes.
  • a lamp according to the prior art has a first illumination mode switch, where the lamp is operated at full power. Through a series of quick succession switching sequences, e.g.
  • the lamp can be switched to a second illumination mode, in which the lamp as is operated with a predetermined lower power, and so is dimmed. Turning off the lamp brings it back to the initial state, which can be selected as of either the first or the second light mode.
  • a control circuit analyses the fast, repeated (for example, two times) on and off the operating voltage and interprets this as control information, especially as dimming information. Following an on-off-on switching sequence the operating voltage of the ballast from the lamp that is changed so that the lamp is operated at reduced power (dimmed).
  • a lamp control system for use in a lighting system comprising a lamp and a user- operated switch for controlling operation of the lamp, the system comprising: detection means operable to detect operation of the switch and to generate an output indicative thereof; and
  • driver means responsive to the output, and operable to adjust the output colour of the lamp.
  • the detector means may detect a pattern of operations of the switch and adjust the output colour of the lamp in response thereto.
  • the lamp may be an LED lamp.
  • the lamp may comprise a plurality of light emitting parts, each of which emits a different colour, and wherein the driver means is operable to vary the intensity of at least one of the light emitting parts to provide the output colour adjustment.
  • the driver means may be operable to adjust the colour of the lamp according to a predetermined sequence in response to operation of the switch.
  • the system may include a memory for storing the state of the lamp.
  • the driver means may be operable to adjust the intensity of the lamp.
  • the present invention also provides a method of controlling a lamp as defined in the claims.
  • the embodiments provide a dynamic double (multi) click function for setting dimming levels and/or colour control in lighting systems (mainly but not necessarily for LED based lighting bulbs).
  • the proposal comprises sensing the input AC mains voltage, detecting cycles of 0V (switch clicks) and setting different levels of colour and/or dimming levels according to the number of click cycles and/or sequence of their occurrence.
  • the embodiments include such detection both in the primary and/or secondary of the lighting power converter (non-isolated and isolated part of the converter if provided).
  • Methods for colour control include dimming groups of LEDs with different colours and any other type of colour control. For instance, if a bulb that produces white light presents red, green and blue LED sets, colour control may be achieved via independent control through dimming of one, two or all three of these sets.
  • the double/multi click arrangement may be applied to control the colour of an RGB - red, green, and blue - (or other colour) lighting engine via setting the right dimming levels in the red. green and blue (or other colour) LEDs through amplitude (current) and/or PWM dimming.
  • the LEDs may further include white LEDs with the intensity of the white LEDs kept constant and the colour adjustment being provided by changing the intensity of the colour LEDs.
  • the LEDs may be only white (blue with phosphor) and red LEDs, with the intensity of the white LEDs kept constant and setting the red LEDs current for obtaining colour control to some extent.
  • the double click detection may set the next level of colour of the light engine from a range of discrete values and the last (most recent) value may be stored in a physical memory such as an EEPROM.
  • the clicks set the colour in the range in a cyclic manner, coming back to the first selected colour after passing though all other levels.
  • the system described may also provide dimming too of the total light output of the lamp.
  • Colour and lighting level may be set in a double/multi click system. For instance, the system can present four different colours and for each colour five dimming levels. Each click may set the lighting unit in a different dimming level, and a different colour may be set at every fifth change. After passing through five dimming levels for four different colours, the first colour and dimming level would be set again and the cycle restarted.
  • LEDs based lighting bulbs with multi click function for setting up to some extend the light colour via dimming LEDs arrays of different colours. For instance, in a light engine with red, green and blue LEDs, to dim only the red LEDs and/or the greens and/or the blues according to the multi-click setting.
  • Figure 1 shows how the lighting system would look from the user/installer point of view
  • Figure 2 shows a schematic structure of a lamp control system in accordance with the invention
  • Figure 3 shows a general block diagram of the lamp control system
  • Figure 4 shows a known input voltage detection circuit that can be applied to the embodiments
  • Figures 5A to 5D are waveforms showing the operation of the input voltage detection circuit of Figure 4.
  • Figures 6, 7 and 8 show supply/driver waveforms and light engine colour across time plot with an example of a four colour system
  • Figures 9- 14 show several different examples of colour configuration using white, red, green, and blue LEDs in several combinations.
  • the colour of bulbs or other lighting system may be controlled via multi click synchronously if they are connected in parallel, sharing the same mains switch supply.
  • Figure 1 shows how such an arrangement would look from the user/installer point of view.
  • a user-operated switch is inserted in series (usually connected to the phase terminal, but not necessarily) with the lighting devices (bulbs, for instance). Switching on and off the mains switch over more than 1 cycle (typically switching within a period in the range from 200ms up to Is) indicates one click for an ordinary manual switch.
  • Such switch control can also be implemented via a relay and with another user interface; however the focus of embodiments is the direct user pulling.
  • the embodiments include a kind of codified click, where AC mains cycles are counted between 0V intervals. It is important to highlight, though, that all kinds of clicking codes and decodes are to be included in this proposal.
  • the lamp control system consists of an operating unit (light engine) 10 and a light source 15, e.g. an inorganic LED or OLED light source.
  • a light source e.g. an inorganic LED or OLED light source.
  • Other lamps such as, for example halogen lamps or gas discharge lamps may be operated by the operating unit 10.
  • the operating unit 10 is connected via a wire to a power source 2.
  • the operating device 10 can be selectively connected by at least one (one- or two- pole) switch 3 to the voltage source 2.
  • the light source 15 another resource may be controlled which produces an optical or acoustic output.
  • the switch 3 may be a conventional switch that is provided for an existing lighting system. That lighting system may have originally used incandescent bulbs and is retrofitted with LED lamps. The embodiments allow the existing on/off switch 3 to control characteristics of the light output of the LED light source, including the colour.
  • the operating unit 10 includes a sequence manipulation detector (detection means) 1 1, e.g. a switching sequence detector; and a modulator 12, a memory 13 and a power converter 14 (comprising drive means).
  • the light source 15 may be part of the operating unit 10 or separate therefrom.
  • the LED 15 is controlled by the power converter 14 which is clocked at high frequency.
  • the power converter 14 may be formed by a switching regulator and has at least one power switch, which is clocked at high frequency.
  • the power converter 14 may be, for example, an inverter (buck-boost converter), a down converter (buck converter), an insulating barrier converter (flyback converter) or an isolated or not isolated half-bridge converter, for example.
  • the power converter 14, shown schematically as a block can be formed one or more stages.
  • One or more stages may be used, and one or more active switches clocked by one or more control circuits.
  • An example of a multi-stage design is a two-stage design in which the first stage of an actively synchronized PFC (Power Factor Correction) circuit that provides a DC output voltage, which is preferably controlled.
  • a second converter stage as an intermediate circuit voltage or bus voltage is supplied to a DC / DC converter (for example, suitable for the case of LEDs as light sources) or a DC / AC converter (for example, suitable for the case of gas discharge lamps).
  • the second stage converter can be clocked by one or more switches.
  • the second stage may be PWM (pulse width modulation).
  • the sequence manipulation detector 11 is configured to recognize manipulation sequences or switching sequences generated by the switching of the switching element 3.
  • the sequence manipulation detector 11 monitors criteria such as time constants and / or repetition to discriminate different switching sequences.
  • the sequence manipulation detector 11 includes an AC mains period detector.
  • FIG 3 shows a general block diagram of the lamp control system.
  • the input of the system formed by means of a high frequency input filter 20 connected to the voltage supply mains 2, which high frequency input filter 20 is connected with a rectifier circuit 22 (usually a diode bridge).
  • the rectified supply voltage from the rectifier circuit 22 is fed to a filter 24, and finally to the power converter 14.
  • the power converter 14 of Figure 3 comprises an off-line DC- DC converter 26 and a respective LED driver 28 A...28n for each LED module 15A...15n of light source 15.
  • the filter 24 may include a PFC circuit.
  • a PFC circuit essentially comprises an inductor followed by a diode, with a switch (typically an FET) connected between the inductor and the diode to ground.
  • a switch typically an FET
  • the inductor is repeatedly first connected directly to ground via the switch and then connected to the output capacitor (via the diode) when the switch is turned off.
  • the switch is on the current flow through the inductor increases and, during the subsequent time period in which the switch is off, the current decreases, effectively pushing current through the diode to charge the output capacitor.
  • the output voltage may be adjusted to a fixed, desired value (target value), although the output voltage is always higher than the input voltage because of the action of the diode in conjunction with the "boosting" action of the inductor.
  • the sequence manipulation detector 11 can be combined with a known circuit that is used in emergency units and to recognize when emergency lighting is required - when the normal AC supply voltage for operating the device is absent and instead a DC voltage is applied (e.g. from a battery).
  • the principles used for emergency lighting detection can be used to detect operation (clicking) of the switch 3.
  • Such a circuit is known from DE 10 2007 0405 55 Al, whose disclosure is incorporated herein by reference.
  • the circuit is shown in Figure 4. Briefly, such a circuit comprises two measuring circuits Ml and M2. The first measuring circuit is shown in dotted lines Ml, and the second measuring circuit is shown in dashed lines M2.
  • Vmains is an alternating voltage with alternating positive and negative mains half-waves
  • a current flows during the positive mains half- wave through the measuring circuit M 1 , while flowing through the measuring circuit M 2 is a flow during the negative mains half-wave.
  • the resistances of the separate resistors Rl and R2 are chosen to be different. Thus, the currents of the two measuring circuits Ml and M2 are different because of the resistance Rl is part only of, measurement circuit Ml and the resistor R2 is part only of measuring circuit M2.
  • the voltage drop across the measuring resistor R4 is evaluated by an evaluation circuit which includes a compensating capacitor C2 and two comparators Kl and K2.
  • the measuring resistor R4 to the voltage drop is denoted by Vac / dc.
  • the comparator Kl is fed with, the measured voltage drop across R4 to its positive terminal and the negative terminal receives a threshold voltage Vref / high.
  • the comparator K2 is also fed with the voltage drop across R4, but to its positive terminal, the negative terminal receiving a threshold, voltage Vref / low.
  • FIG 5A shows the case that there is no voltage at all at the input of the circuit of Figure 4. Vmains is zero. This is shown in 5B where, at the measuring resistor R4, the voltage drop V ac / dc is zero. Accordingly, the voltage at the output of both comparators according to FIG 5C and FIG 5D is zero. This pattern is therefore characteristic of the case at the entrance of the test circuit no power is available.
  • Such a circuit can also detect whether Vmains is AC or DC by the output of the comparators Kl and K2.
  • a simplified circuit may be used in the embodiment to detect switching operations (e.g. only a single comparator is required).
  • Such an AC / DC detection circuit may be used alone to implement the function of detecting the switch manipulation sequence.
  • an AC / DC detection circuit for both the detection of AC / DC voltage and also able to recognize the temporary switching off the AC supply is used (followed by DC).
  • the sequence manipulation detector 11 is connected to the modulator 12 and the memory 13.
  • the modulator 12 is connected to the memory 13 and the power converter 14.
  • the modulator 12 may adjust an operating parameter, e.g. a voltage to respective ones of the LED modules 15A...15n of the lamp 15, to cause the power converter 14 to drive the LED modules 15A... 15n of the lamp 15 with values between the first value and the second value, or to operate on these values.
  • These values of the power converter 14 may be implemented, for example, by varying the frequency or the duty ratio of the power converter 14.
  • the operating parameters can be in the case of multi-stage design of the clocking of the power converter / switch of one of the stages or multiple stages.
  • FIG. 6 shows how the output of the light source 15 is varied by the power convertor 14 in response to measurements made by the sequence detector 11.
  • Waveform A shows the AC supply voltage at 2.
  • Waveform B shows the driver input voltage to the operating unit 10 due to the effect of the switch 3 on the AC supply voltage at 2.
  • the switch 3 is initially on (closed) for a period of six mains cycles (120ms for a 50Hz mains supply), followed by a similar length period where the switch 3 is in the off (open) position. This is shown as "click 1" in Figure 6.
  • This pattern of operation of the switch 3 is recognised by the sequence detector 11.
  • the sequence detector 11 transmits a signal to the modulator 12 indicating that the click pattern has occurred.
  • the modulator 12 consults a look-up table and the memory 13 to determine the current status of the illumination of the light source 15. In this instance the light source 15 is in its initial state, and the modulator 12 is advised of this.
  • the on/off pattern operation of the switch within a predetermined time period is interpreted as a signal by the user that the user wishes to adjust the colour of the light emitted from the light source 15. Accordingly, the modulator 12 transmits via memory 13 a set signal 16 to the power convertor 14 to adjust how the light source 15 is driven to adjust the output colour.
  • the sequence detector 11 continues to monitor the driver input and to output a signal representative thereof to the modulator 12.
  • the sequence detector 1 1 detects the on/off operation of the switch 3 represented by "click 2" in waveform B. According to the look-up table of the modulator 12 this is an indication that the user wishes to change the colour output of the light source 15.
  • the modulator 12 again consults the memory 13 to determine the current status of the light source 15. That the light source 15 is in the state "colour 1" is communicated from the memory 13 to the modulator 12. According to the look-up table, the modulator 12 transmits via the memory 13 a set signal 16 to look out convertor 14 to cause the light source 15 to adjust the colour to "colour 2".
  • the status of the light source 15 as being "colour 2" is stored in the memory 13.
  • the sequence detector 11 monitors the driver input and identifies a subsequent on/off operation of the switch 3 ("click 3"). This is communicated to the modulator 12. According to the look-up table of the modulator 12 it is confirmed that this operation of the switch is an indication that the user wishes to change the output colour of the light source 15. As before, the current state of the light source 15 is obtained from the memory 13. In this instance, the memory 13 will indicate the modulator 12 that the current status of the light source 15 is "colour 2". According to the look-up table, the modulator then sends via the memory 13 the set signal 16 to instruct the power convertor 14 to change the light source output to "colour 3".
  • Figure 7 shows similar waveforms to Figure 6. However, in Figure 7 the AC supply voltage is interrupted.
  • the sequence detector 11 resets a timer when the first zero crossing of the driver input waveform B occurs and increments this time regularly to perform a count.
  • the sequence detector 1 1 is configured to enter a "reset" state when the count reaches a maximum value. When the count reaches the maximum value operation of the modulator it is suspended and no further changes to the set colour ("colour 4" in the Figure 7 example) are made.
  • the driver input waveform is subsequently resumed the state (“colour 4") is not adjusted until after the first on/off operation of the switch 3 is detected ("click 3").
  • the sequence detector 11 provides an appropriate indicator to the modulator 12.
  • FIG 8 shows an alternative operation arrangement of the operating unit 10. In this arrangement alternate on/off operation of the switch 3 does not cause the colour state of light source 15 to change on each cycle. Only after five on/off cycles of the switch 3 (a "Sequence" of cycles) being detected does the modulator 12 cause the power convertor 14 to change the colour state of the light source 15 (from "colour 2" to "colour 3"). However, the first to fourth cycles of the switch 3 are detected by the sequence detector 11 and communicated to the modulator 12.
  • each of the first to fourth on/off switch examples may be used to adjust some other operating parameter of the light source 15, such as to adjust its intensity (dimming) within the current colour ("colour 2" in Figure 8).
  • operation of the switch may be used to control both the intensity (dimming) or the light source 15 and the colour.
  • the switch 3 is not operated during the time where the AC supply voltage is interrupted.
  • the sequence detector 11 provides an appropriate indicator to the modulator 12.
  • the modulator 12 then provides the set signal 16, via memory 13, to the power convertor 14 to cause the light source output to enter the state "colour 2".
  • the system may operate for a short term even after an interruption of the AC supply.
  • the power convertor 14 may include a respective LED driver for each LED module of the light source 15.
  • a group of LEDs may, however, be driven by a single LED driver.
  • the set signal 16 may include a signal portion for each of the LED drivers to provide colour control.
  • Figures 9 to 14 show LED driver equivalent current source and configuration options for various LED modules that may comprise a light source 15.
  • Figure 10 shows an alternative arrangement.
  • a plurality of white LEDs are provided which may be driven at a substantially constant intensity.
  • a further red LED (or string of red LEDs), green LED (or string of green LEDs) and blue LED (or string of blue LEDs) are provided -each coloured group being subject to separate current control in order that the intensity of each colour is separately controllable.
  • the current provided to each colour is controlled according to the set signal 16 in order to provide the desired colour.
  • Figure 11 shows an alternative arrangement in which the light source 15 comprises the coloured LEDs of Figure 10 but no plurality of white LEDs.
  • the coloured LEDs are individually controllable as in Figure 10 in order to provide an appropriate output colour according to the set signal 16.
  • Figure 12 shows an alternative, which corresponds to that of Figure 1 1, but omits the blue LED (or LED string).
  • Figure 13 shows a further alternative corresponding to the Figure 11 arrangement which comprises a red LED (or LED string) and a blue LED (or LED string).
  • Figure 14 shows an alternative arrangement to that of Figure 11 in which the light source 15 comprises a green LED (or LED string) and a blue LED (or LED string).
  • the memory 13 is connected to the manipulation sequence detector 11, modulator 12, and the power converter 14.
  • a value can be stored, indicating the current value for the operating parameters, e.g. a colour or dimming level for a light source 15
  • This value can be defined as the power converter 14 operates the light source 15, i.e. at which emission light source 15 is to be set.
  • the invention has been described primarily in terms of LED lamps, especially retrofit LED lamps. It is understood, however, that the invention can also be applied to appropriately designed control gear for other light sources.
  • a double or multi click ac supply cycling (switching) technique has been described that can be applied to control/regulate/set the colour of a lighting engine whose driver is supplied by AC line/mains. Any method for click detection, all clicking modulation/codification and any type of colour setting and control are applicable to this invention.
  • the lighting engine may be of any type.
  • the setting may be stored in a physical memory (such as an EEPROM or Flash).
  • the memory is however optional and may be omitted.

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

Abstract

L'invention concerne un système de commande de lampe destiné à être utilisé dans un système d'éclairage comprenant une lampe (15) et un commutateur actionné par l'utilisateur (3) pour commander le fonctionnement de la lampe. Le système comprend des moyens de détection (11) aptes à fonctionner pour détecter le fonctionnement du commutateur et pour générer une sortie indicatrice de celui-ci ; et des moyens de commande (12, 13, 14), répondant à la sortie, et aptes à fonctionner pour ajuster la couleur de sortie de la lampe. Les moyens de détection peuvent détecter un schéma de fonctionnement du commutateur et ajuster la couleur de sortie de la lampe en réponse à celui-ci. La lampe peut être une lampe LED.
PCT/EP2013/050321 2012-01-12 2013-01-09 Contrôleur de lampe WO2013104684A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1200470.1A GB2498371B (en) 2012-01-12 2012-01-12 Lamp controller
GB1200470.1 2012-01-12

Publications (1)

Publication Number Publication Date
WO2013104684A1 true WO2013104684A1 (fr) 2013-07-18

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Application Number Title Priority Date Filing Date
PCT/EP2013/050321 WO2013104684A1 (fr) 2012-01-12 2013-01-09 Contrôleur de lampe

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GB (1) GB2498371B (fr)
WO (1) WO2013104684A1 (fr)

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DE102013219153A1 (de) * 2013-09-24 2015-04-09 Tridonic Gmbh & Co Kg Treibermodul mit sekundärseitiger Erkennung einer primärseitigen elektrischen Versorgung
DE102014104447A1 (de) * 2014-03-28 2015-10-01 Bag Engineering Gmbh Elektronisches Vorschaltgerät für LED-Leuchtmittel
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WO2018150342A1 (fr) * 2017-02-15 2018-08-23 Medricky Hynek Lampe à led constituée de diodes électroluminescentes (led) avec mode à réglage circadien de la lumière rayonnée assurant sa sécurité sanitaire
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WO2011036595A1 (fr) * 2009-09-23 2011-03-31 Koninklijke Philips Electronics N.V. Unité de lampe à pluralité de sources de lumière et procédé de commande à distance de commutateur à bascule pour sélectionner un réglage d'entraînement
WO2011048214A1 (fr) * 2009-10-23 2011-04-28 Tridonic Gmbh & Co Kg Fonctionnement d'une lampe à del à spectre variable

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DE102013219153A1 (de) * 2013-09-24 2015-04-09 Tridonic Gmbh & Co Kg Treibermodul mit sekundärseitiger Erkennung einer primärseitigen elektrischen Versorgung
DE102013219153B4 (de) 2013-09-24 2024-05-16 Tridonic Gmbh & Co Kg Treibermodul mit sekundärseitiger Erkennung einer primärseitigen elektrischen Versorgung
DE102014104447A1 (de) * 2014-03-28 2015-10-01 Bag Engineering Gmbh Elektronisches Vorschaltgerät für LED-Leuchtmittel
DE102014225828A1 (de) * 2014-12-15 2016-06-16 Tridonic Gmbh & Co Kg Betriebsgerät mit Detektionsmitteln zur Erkennung von Phasenanschnitten und/oder -abschnitten in der Versorgungsspannung
EP3466217A4 (fr) * 2016-05-24 2019-11-27 Eaton Intelligent Power Limited Commande d'éclairage basée sur un interrupteur
US10721803B2 (en) 2016-05-24 2020-07-21 Signify Holding B.V. Switch based lighting control
US11297701B2 (en) 2016-05-24 2022-04-05 Signify Holding B.V. Switch based lighting control
CN112469166A (zh) * 2020-11-06 2021-03-09 深圳市晟碟半导体有限公司 一种led灯控制电路、控制方法及led灯具
CN112469166B (zh) * 2020-11-06 2023-03-17 深圳市晟碟半导体有限公司 一种led灯控制电路、控制方法及led灯具

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