CN106332359B - A kind of exchange roam lamp control device and method - Google Patents
A kind of exchange roam lamp control device and method Download PDFInfo
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- CN106332359B CN106332359B CN201610825502.7A CN201610825502A CN106332359B CN 106332359 B CN106332359 B CN 106332359B CN 201610825502 A CN201610825502 A CN 201610825502A CN 106332359 B CN106332359 B CN 106332359B
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- 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
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
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Abstract
The invention discloses a kind of exchange roam lamp control device and method, which includes: AC network；AC power distribution cabinet/AC distribution panel module, including waveform convertion unit and communication control unit, communication control unit generates the full-wave rectification modulation comprising control information under the control of communication control unit and exchanges electricity output for control signal needed for receiving system command and at the control generation control waveform convertion cell operation, waveform convertion unit；Streetlight unit, including waveform detection unit, LED drive unit and LED lamp, waveform detection unit is used to detect the envelope of the modulation exchange electricity output, and corresponding actions are carried out according to the agreement output control LED drive unit of the shape cooperation of envelope agreement, LED drive unit is used to the modulation alternating current output adjustment be supply voltage needed for LED lamp, through the invention, realize long-range control turn on light, turn off the light, the purpose of brightness regulation.
Description
Technical field
The present invention relates to the Street lamps control field of ac power supply system, more particularly to a kind of exchange roam lamp control device and
Method.
Background technique
In LED alternating-current street lamp application, there is PLC (Power line Communication, power line carrier, PLC) at present
Carrier communication and wireless ZigBee communication both of which.In current LED alternating-current street lamp application, a section uses one
Power supply box 1 is powered, and monitoring center and power supply box 1 communicate, and power supply box 1 is also communicated with all streetlight units 2, monitoring center and power supply
Usually using modes such as GPRS communication, RS485 communications between case 1, electric power load is then often used between power supply box 1 and streetlight unit 2
Wave (PLC) communication module (Fig. 1) or ZigBee communication module (Fig. 2) are communicated.
When monitoring center control turns on light, turns off the light, dimming, control command is transmitted to each by the communication module in power supply box 1
Streetlight unit 2, then the corresponding command movement is executed by the power control unit in streetlight unit 2.
However, existing LED alternating-current street lamp has the drawback that
1, installation power carrier communication module (PLC) or ZigBee communication module are required on each street lamp.Due to electric power
The higher cost of carrier communication module (PLC) and ZigBee communication module, when street lamp quantity is more, the totle drilling cost of communication component
It is very high.
2, since the transmission power of ZigBee communication module is small, communication distance is short, thus long range communication need by
Adjacent block transmits signal.When there is communication module failure, subsequent street lamp may be caused to lose because signal can not be transmitted
It goes to control.
3, the communication of power carrier communication module (PLC) and ZigBee communication module is compared with vulnerable to extraneous noise jamming.
Summary of the invention
In order to overcome the deficiencies of the above existing technologies, purpose of the present invention is to provide a kind of exchange roam lamp control devices
And method, change the frequency of the supply voltage of route, the confession after frequency shift when needing to communicate by waveform convertion unit
Piezoelectric voltage passes through existing power supply line, streetlight unit is transferred to, by the frequency of the waveform detection unit resolves waveform of streetlight unit
Changing rule compares the rule of communication of agreement, identifies corresponding control command, is then transferred to LED drive unit, to reach
LED lamp such as is turned on light, turns off the light, dim at the purpose of movements in long-range control streetlight unit, and the present invention is not necessarily to install communication module, disappear
In addition to the dependence to ZigBee communication module transmitting signal, and the quality of communication can be improved, improve the reliability of communication.
In order to achieve the above object, the present invention proposes a kind of exchange roam lamp control device, comprising:
AC network, for powering to road lamp system；
AC power distribution cabinet/AC distribution panel module, including waveform convertion unit and communication control unit, the communication control unit is for connecing
Control signal needed for receiving system command and generating the control waveform convertion cell operation at the control, the waveform convertion
Unit under the control of the communication control unit for generating the full-wave rectification modulation exchange electricity output comprising control information；
Streetlight unit, including waveform detection unit, LED drive unit and LED lamp, the waveform detection unit are used for
The envelope of the modulation exchange electricity output is detected, and the LED is controlled according to the agreement output of the shape cooperation of envelope agreement and is driven
Moving cell carries out corresponding actions, and the LED drive unit is used to the modulation alternating current output adjustment be the LED lamp institute
The supply voltage needed.
Further, the communication control unit changes power supply line by the waveform convertion unit when needing to communicate
Supply voltage frequency, by the supply voltage after frequency shift pass through existing power supply line, be transferred to streetlight unit；The road
The frequency changing rule of the waveform detection unit resolves waveform of lamp unit compares the rule of communication of agreement, identifies corresponding control
Order, and it is transferred to the LED drive unit.
Further, the waveform convertion unit includes multichannel or 1 tunnel waveform convertion circuit composition, every road waveform convertion electricity
Road is switched including four controllable bypass switchings and four unidirectional devices, four unidirectional devices composition rectifier bridge, and described four
Controllable bypass switching switch composition switching switching group.
Further, the waveform convertion unit includes first to fourth controllable bypass switching switch, first to fourth list
To device, the firewire of the AC network connects the anode of the first unidirectional device, the cathode of the second unidirectional device and first can
One end of bypass changeover switch is controlled, the anode of the second unidirectional device connects one end of the second controllable bypass switching switch, the friendship
The zero curve N of galvanic electricity net connects the anode of the third unidirectional device, the cathode of the 4th unidirectional device and the 4th controllable bypass and cuts
Changing one end of switch, the cathode of the third unidirectional device connects one end of the third controllable bypass switching switch, and described the
The cathode of one unidirectional device is opened with the other end of first controllable bypass switching switch and third controllable bypass switching
The other end of pass is connected to form modulation exchange electricity output A ', and anode and second controllable bypass of the 4th unidirectional device are cut
The other end of the other end and the 4th controllable bypass switching switch that change switch is connected to form modulation zero line output N ', described
The control terminal of first to fourth controllable bypass switching switch is separately connected four control signals of the communication control unit output,
The modulation exchange electricity output A ' and modulation zero line output N ' is connected to the waveform detection unit of the streetlight unit, LED drives
The input terminal of unit.
Further, the unidirectional device is diode or rectifier bridge, and the controllable bypass switching switch is ac contactor
Device or relay or other can be used for alternating-current switch switching device.
Further, when not needing communication, the second controllable bypass switching switch, third controllable bypass switching switch
It disconnects, the first controllable bypass switching switch, the switching of the 4th controllable bypass close the switch；The AC power distribution cabinet/AC distribution panel module with it is described
When streetlight unit communicates, the first controllable bypass switching switch, the 4th controllable bypass switching switch are disconnected, and described second is controllable
Bypass changeover switch, the switching of third controllable bypass close the switch.
Further, described device is used for single phase power supply system or three-phase power supply system.
In order to achieve the above objectives, the present invention also provides a kind of exchange method for controlling street lamps, include the following steps:
Step 1, when needing to communicate, communication control unit in AC power distribution cabinet/AC distribution panel module is changed by waveform convertion unit
The frequency for becoming the supply voltage of power supply line, by the supply voltage after frequency shift by existing power line transmission to street lamp list
Member；
Step 2, by the frequency changing rule of the waveform detection unit resolves waveform of the streetlight unit, according to agreement
Rule of communication identifies corresponding control command, is then transferred to LED drive unit；
Step 3 executes corresponding actions by LED drive unit driving LED street lamp.
Further, in step 1, the frequency of supply changing rule of the power supply line is with twice of mains frequency
Frequency is exported by the AC power distribution cabinet/AC distribution panel module and power supply line to the streetlight unit as a characteristic wave.
Further, the communication control unit appoints that corresponding frequency variation is advised with the waveform detection unit in advance
The corresponding LED lamp control command of rule.
Compared with prior art, a kind of exchange roam lamp control device of the present invention and method are being needed by waveform convertion unit
The frequency for changing the supply voltage of route when communicating, the supply voltage after frequency shift pass through existing power supply line, are transferred to
Streetlight unit compares the rule of communication of agreement by the frequency changing rule of the waveform detection unit resolves waveform of streetlight unit, knows
Not corresponding control command, is then transferred to LED drive unit, thus reach LED lamp in long-range control streetlight unit turn on light,
It the purposes of movements such as turns off the light, dim, the present invention is eliminated without installing communication module to ZigBee communication module transmitting signal
It relies on, and the quality of communication can be improved, improve the reliability of communication.
Detailed description of the invention
Fig. 1 is to be shown between power supply box and street lamp using what power carrier (PLC) communication module was communicated in the prior art
It is intended to；
Fig. 2 is the schematic diagram communicated between power supply box and street lamp using ZigBee communication module in the prior art；
Fig. 3 is a kind of structural schematic diagram for exchanging roam lamp control device of the present invention；
Fig. 4 is the detail structure chart of waveform convertion unit in present pre-ferred embodiments；
Fig. 5 is in present pre-ferred embodiments without the transmission of waveform convertion and the schematic diagram of analytic signal；
Fig. 6 is the schematic diagram of the transmission and analytic signal in present pre-ferred embodiments Jing Guo waveform convertion；
Fig. 7 is a kind of step flow chart for exchanging method for controlling street lamps of the present invention.
Specific embodiment
Below by way of specific specific example and embodiments of the present invention are described with reference to the drawings, those skilled in the art can
Understand further advantage and effect of the invention easily by content disclosed in the present specification.The present invention can also pass through other differences
Specific example implemented or applied, details in this specification can also be based on different perspectives and applications, without departing substantially from
Various modifications and change are carried out under spirit of the invention.
Fig. 3 is a kind of structural schematic diagram for exchanging roam lamp control device of the present invention.As shown in figure 3, a kind of exchange of the present invention
Roam lamp control device, comprising: including AC network 10, AC power distribution cabinet/AC distribution panel module 20 and streetlight unit 30.
Wherein, AC network 10 is street lamp power supply, road lamp power supply network, is used to power to road lamp system, usually three-phase and four-line, street lamp
Unit 30 is connected across between phase line and zero curve；AC power distribution cabinet/AC distribution panel module 20 is by waveform convertion unit 210 and 220 groups of communication control unit
At communication control unit 220 is universal circuit, includes microprocessor and telecommunication circuit, for receiving system command and in its control
The lower control signal CT1-CT4 for generating control waveform convertion unit 210 and working required of system, waveform convertion unit 210 are used for logical
Believe and generates the full-wave rectification modulation exchange electricity output comprising control information under the control of control unit 220；Streetlight unit 30 includes
Waveform detection unit 310, LED drive unit 320 and LED lamp 330, waveform detection unit 310, LED drive unit 320
Input is all connected with the full-wave rectification modulation exchange electricity output of AC power distribution cabinet/AC distribution panel module 20, and waveform detection unit 310 includes detection electricity
Road and decision circuitry (not shown), typical detection circuit are peak value or envelope detection, and decision circuitry is microprocessor or logic
Circuit, waveform detection unit 310 are used to detect the envelope of full-wave rectification modulation exchange electricity output, and according to the shape cooperation of envelope
The agreement output control LED drive unit 320 of agreement carries out corresponding actions and such as dims brightness, adjust colour temperature, turn on light, turn off the light,
LED drive unit 320 is controlled rectification circuit, is the electricity of power supply needed for LED lamp 330 for that will modulate alternating current output adjustment
Pressure, LED lamp 330 are available circuit, provide illumination when bad for illumination.Generally, an AC power distribution cabinet/AC distribution panel module 20 is controlled
Multiple streetlight units 30 are made, each streetlight unit 30 is connected across between phase line and zero curve as its load by load balancing principle.
Fig. 4 is the detail structure chart of waveform convertion unit in present pre-ferred embodiments.In the present invention, waveform convertion list
Member 210 is made of multichannel or 1 tunnel waveform convertion circuit (present pre-ferred embodiments are by taking 1 tunnel as an example), every road waveform convertion circuit
It is made of 4 controllable bypass switching switches and 4 unidirectional devices, unidirectional device D1-D4 forms rectifier bridge, can be diode, whole
Flow the devices such as bridge, controllable bypass switches switch K1-K4 composition switching switching group, can be A.C. contactor, relay or other can
Device for alternating-current switch switching.
Specifically, the firewire (phase line A) of AC network and zero curve N are connected to the waveform convertion list of AC power distribution cabinet/AC distribution panel module 20
The input terminal of member 210, firewire (phase line A) connect the anode of unidirectional device D1, the cathode of unidirectional device D2 and controllable bypass switching
One end of switch K1, one end of the anode connection controllable bypass switching switch K2 of unidirectional device D2, zero curve N connection unidirectional device D3
Anode, the cathode of unidirectional device D4 and one end of controllable bypass switching switch K4, by the cathode connection of unidirectional device D3 is controllable
Road switches one end of switch K3, and the cathode of unidirectional device D1 is cut with the other end and controllable bypass of controllable bypass switching switch K1
The other end for changing switch K3 is connected to form the anode of modulation exchange electricity output A ', unidirectional device D4 and controllable bypass switches switch K2
The other end and controllable bypass switching switch K4 the other end be connected to form modulation zero line output N ', controllable bypass switching switchs
The control terminal of K1-K4 is separately connected the control signal CT1-4 of the output of communication control unit 220, modulation exchange electricity output A ' and tune
Zero line output N ' processed is connected to the input terminal of the waveform detection unit 310 of streetlight unit 30, LED drive unit 320, waveform detection
The output of unit 310 is connected to the control terminal of LED drive unit 320, and the output of LED drive unit 320 is connected to LED lamp
330。
Fig. 5 is without the transmission of waveform convertion and the schematic diagram of analytic signal in present pre-ferred embodiments, and Fig. 6 is this
The schematic diagram of transmission and analytic signal in invention preferred embodiment Jing Guo waveform convertion.It is further below in conjunction with Fig. 5, Fig. 6
Illustrate the principle of the present invention:
Waveform convertion unit 210 in Fig. 4, when not needing communication, it is to disconnect, is controllable that controllable bypass, which switches switch K2, K3,
Bypass changeover switch K1, K4 are closed state, the standard of the output waveform of waveform convertion unit 210 top half as shown in Figure 5
Sine wave.The digital signal that the detection circuit of the waveform detection unit 310 of streetlight unit 30 parses is the square wave of 50Hz, wave
The decision circuitry of shape detecting unit 310 determines at this time without control signal.
Communication control unit when AC power distribution cabinet/AC distribution panel module 20 is communicated with streetlight unit 30, in AC power distribution cabinet/AC distribution panel module 20
220 by controllable bypass switching switch K1, K4 disconnect, controllable bypass switch switch K2, K3 close, waveform convertion unit 210 it is defeated
Waveform top half as shown in FIG. 6 out becomes frequency as the steamed bun wave of 100Hz, and the waveform detection unit of streetlight unit 30
The digital signal that 310 decision circuitry parses is the square wave of 100Hz, and the square wave of lower half portion as shown in Figure 6 can be with
The frequency waveform of 100Hz is as a characteristic wave.It, can be with the wave of 100Hz so by the frequency comparison before and after waveform convertion
Shape is encoded as the waveform of an effective order logical one, 50Hz are command logic " 0 ".It is assumed that first waveform becomes
After the completion of changing, interval 100ms switches once again, and the waveform convertion interval time of front and back twice is then 100ms.If being with 100ms
A cycle switching is primary, and the time interval for arranging 100ms is an order (such as turning on light).This time interval can be other
It is required that such as 200ms, 300ms, order other meanings mutually about can also be set to by AC power distribution cabinet/AC distribution panel and streetlight unit, such as dimmed
Brightness adjusts colour temperature, turns on light, turns off the light.Related command can also be defined by the number of waveform convertion, as waveform convertion is primary
To turn on light, twice to turn off the light, different switching times are indefinite order for switching.It can certainly be according to the difference in three-phase electricity
Waveform combination distinguishes different orders.
Fig. 7 is a kind of step flow chart for exchanging method for controlling street lamps of the present invention.As shown in fig. 7, a kind of exchange of the present invention
Method for controlling street lamps includes the following steps:
Step 701, when needing to communicate, communication control unit in AC power distribution cabinet/AC distribution panel module passes through waveform convertion unit
The frequency for changing the supply voltage of power supply line, the supply voltage after frequency shift pass through existing power supply line, are transferred to street lamp
Unit.In a preferred embodiment of the present invention, the frequency of supply changing rule of power supply line be using 2 overtones bands of mains frequency as
One characteristic wave is exported by AC power distribution cabinet/AC distribution panel module and power supply line to streetlight unit.
Step 702, by the frequency changing rule of the waveform detection unit resolves waveform of streetlight unit, the communication of agreement is compared
Rule identifies corresponding control command, is then transferred to LED drive unit；That is, communicating control in AC power distribution cabinet/AC distribution panel module
Unit processed with waveform detecting unit in streetlight unit appoint corresponding frequency changing rule in advance corresponding to LED lamp control
Order.
Step 703, corresponding actions are executed by LED drive unit driving LED street lamp, to remotely control in streetlight unit
LED lamp executes the movement such as turn on light, turn off the light, dimming.
In conclusion a kind of exchange roam lamp control device of the present invention and method, are needing to communicate by waveform convertion unit
When change route supply voltage frequency, supply voltage after frequency shift passes through existing power supply line, is transferred to street lamp list
Member compares the rule of communication of agreement by the frequency changing rule of the waveform detection unit resolves waveform of streetlight unit, and identification is corresponding
Control command, be then transferred to LED drive unit, thus reach LED lamp in long-range control streetlight unit turn on light, turn off the light,
The purpose of the movements such as light modulation, the present invention are not necessarily to install communication module, eliminate the dependence to ZigBee communication module transmitting signal,
And the quality of communication can be improved, improve the reliability of communication.
Compared with prior art, the present invention has the advantage that
1, the present invention can be by the remote control command the accurate transmission turned on light, turn off the light, dimmed to each streetlight unit；Secondly on road
Lamp unit, which does not need additionally to install communication module, can be realized long-range remote control function, considerably reduce system cost.
2, present invention accomplishes the remote controls of intelligent road lamp system to require, improves reliability, reduces costs, and has good
Good economic benefit, reduces material consumption, has the value of environmental protection.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.Any
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by field technical staff.Therefore,
The scope of the present invention, should be as listed in the claims.
Claims (9)
1. a kind of exchange roam lamp control device, comprising:
AC network, for powering to road lamp system；
AC power distribution cabinet/AC distribution panel module, including waveform convertion unit and communication control unit, the communication control unit is for receiving system
Control signal needed for system orders and generates the control waveform convertion cell operation at the control, the waveform convertion unit
For generating the full-wave rectification modulation exchange electricity output comprising control information under the control of the communication control unit；
Streetlight unit, including waveform detection unit, LED drive unit and LED lamp, the waveform detection unit is for detecting
The modulation exchanges the envelope of electricity output, and controls the LED according to the agreement output of the shape cooperation of envelope agreement and drive list
Member carries out corresponding actions, and the LED drive unit is used to the modulation alternating current output adjustment be needed for the LED lamp
Supply voltage；
The communication control unit changes the supply voltage of power supply line when needing to communicate by the waveform convertion unit
Supply voltage after frequency shift is passed through existing power supply line, is transferred to streetlight unit by frequency；The waveform of the streetlight unit
Detecting unit parses the frequency changing rule of waveform, compares the rule of communication of agreement, identifies corresponding control command, and be transferred to
The LED drive unit.
2. a kind of exchange roam lamp control device as described in claim 1, it is characterised in that: the waveform convertion unit includes more
Road or 1 tunnel waveform convertion circuit composition, every road waveform convertion circuit include four controllable bypass switching switches and four isolators
Part, four unidirectional devices form rectifier bridge, four controllable bypass switching switch composition switching switching group.
3. a kind of exchange roam lamp control device as claimed in claim 2, it is characterised in that: the waveform convertion unit includes the
One to the 4th controllable bypass switching switch, first to fourth unidirectional device, the firewire of the AC network connect the first isolator
One end of the anode of part, the cathode of the second unidirectional device and the first controllable bypass switching switch, the anode of the second unidirectional device
Connect the second controllable bypass switching switch one end, the zero curve N of the AC network connect the third unidirectional device anode,
One end of the cathode of 4th unidirectional device and the 4th controllable bypass switching switch, the cathode of the third unidirectional device connect institute
One end of third controllable bypass switching switch is stated, the cathode of first unidirectional device and first controllable bypass switching switch
The other end and the third controllable bypass switching switch the other end be connected to form modulation exchange electricity output A ', the described 4th
The other end and the 4th controllable bypass switching of the anode of unidirectional device and second controllable bypass switching switch switch
The other end be connected to form modulation zero line output N ', the control terminal of first to fourth controllable bypass switching switch is separately connected
Four control signals of the communication control unit output, the modulation exchange electricity output A ' and modulation zero line output N ' are connected to
The input terminal of the waveform detection unit of the streetlight unit, LED drive unit.
4. a kind of exchange roam lamp control device as claimed in claim 3, it is characterised in that: the unidirectional device be diode or
Rectifier bridge, the controllable bypass switching switch is A.C. contactor or relay or other can be used for the device of alternating-current switch switching
Part.
5. a kind of exchange roam lamp control device as claimed in claim 3, it is characterised in that: when not needing communication, described the
Two controllable bypass switching switch, third controllable bypass switching switch disconnect, the first controllable bypass switching switch, the 4th controllable bypass
Switching closes the switch；When the AC power distribution cabinet/AC distribution panel module is communicated with the streetlight unit, the first controllable bypass switching is opened
It closes, the switching switch disconnection of the 4th controllable bypass, the second controllable bypass switching switch, third controllable bypass switching switch close
It closes.
6. a kind of exchange roam lamp control device as described in claim 1, it is characterised in that: described device is used for single phase power supply system
System or three-phase power supply system.
7. a kind of exchange method for controlling street lamps, includes the following steps:
Step 1, when needing to communicate, communication control unit in AC power distribution cabinet/AC distribution panel module passes through waveform convertion unit and changes and supplies
The frequency of the supply voltage of electric line, by the supply voltage after frequency shift by existing power line transmission to streetlight unit；
Step 2, by the frequency changing rule of the waveform detection unit resolves waveform of the streetlight unit, according to the communication of agreement
Rule identifies corresponding control command, is then transferred to LED drive unit；
Step 3 executes corresponding actions by LED drive unit driving LED street lamp.
8. a kind of exchange method for controlling street lamps as claimed in claim 7, it is characterised in that: in step 1, the supply lines
The frequency of supply changing rule on road is using the doubled frequency of mains frequency as a characteristic wave, by the AC power distribution cabinet/AC distribution panel mould
Block and power supply line export to the streetlight unit.
9. a kind of exchange method for controlling street lamps as claimed in claim 7, it is characterised in that: the communication control unit with it is described
Waveform detection unit appoints LED lamp control command corresponding to corresponding frequency changing rule in advance.
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| CN201610825502.7A CN106332359B (en) | 2016-09-14 | 2016-09-14 | A kind of exchange roam lamp control device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101926222A (en) * | 2008-01-23 | 2010-12-22 | 科锐Led照明科技公司 | Dimming signal generation and methods of generating dimming signals |
| CN101977478A (en) * | 2010-10-19 | 2011-02-16 | 傲玺微电子(上海)有限公司 | Digital dimming control method and system for two-wire fluorescent lamps |
| CN105356762A (en) * | 2015-10-27 | 2016-02-24 | 杭州中恒派威电源有限公司 | Bilateral switch switch-over single-phase and three-phase power supply and communication device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1411750B1 (en) * | 2002-10-16 | 2009-07-08 | CCS Inc. | Power supply system for light emitting diode unit |
| CN104955224B (en) * | 2015-06-07 | 2018-11-09 | 中达电通股份有限公司 | Electric power supply control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101926222A (en) * | 2008-01-23 | 2010-12-22 | 科锐Led照明科技公司 | Dimming signal generation and methods of generating dimming signals |
| CN101977478A (en) * | 2010-10-19 | 2011-02-16 | 傲玺微电子(上海)有限公司 | Digital dimming control method and system for two-wire fluorescent lamps |
| CN105356762A (en) * | 2015-10-27 | 2016-02-24 | 杭州中恒派威电源有限公司 | Bilateral switch switch-over single-phase and three-phase power supply and communication device and control method thereof |
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