WO2021052475A1 - 一种控制电路及照明灯具的电源电路 - Google Patents

一种控制电路及照明灯具的电源电路 Download PDF

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Publication number
WO2021052475A1
WO2021052475A1 PCT/CN2020/116255 CN2020116255W WO2021052475A1 WO 2021052475 A1 WO2021052475 A1 WO 2021052475A1 CN 2020116255 W CN2020116255 W CN 2020116255W WO 2021052475 A1 WO2021052475 A1 WO 2021052475A1
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Prior art keywords
light source
contact
light
circuit
relay
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PCT/CN2020/116255
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English (en)
French (fr)
Inventor
周明兴
吕保证
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苏州欧普照明有限公司
欧普照明股份有限公司
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Publication of WO2021052475A1 publication Critical patent/WO2021052475A1/zh

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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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]

Definitions

  • the present invention relates to the field of lighting technology, in particular to a control circuit and a power supply circuit of a lighting lamp.
  • the existing iron chassis ceiling lights are turned on and off through the remote control or the APP-installed terminal.
  • the ceiling lights are turned off by the remote control or the APP-installed terminal, see Figure 1, between the light source plate of the ceiling lamp and the chassis There is a parasitic capacitance C11, and there is a parasitic capacitance C10 between the chassis and the roof. Because the connection between the ceiling lamp and the mains power supply is not broken, the light source board forms a loop to the ground.
  • the parasitic capacitances C10 and C11 have relatively large capacitive reactance and have The function of blocking direct current and alternating current, so a weak alternating current flows through the light source of the ceiling lamp, which makes the ceiling lamp dimly bright.
  • Figure 2 shows the parasitic capacitance distribution between each LED and the chassis when the light source board contains multiple light source LEDs (such as LED1, LED2, LED3...LEDn). Among them, there is a parasitic capacitance C1 between LED1 and the chassis. , There is a parasitic capacitance C2 between the LED2 and the chassis, and there is a parasitic capacitance C3 between the LED3 and the chassis, and so on.
  • a resistor of appropriate resistance is connected in parallel with the LED of the ceiling lamp, so that most of the current through the LED when the ceiling lamp is normally emitting light, and a small part of the current passes through the resistor. After the lamp is turned off, a weak current passes through the resistor. So that the ceiling lamp will not appear dim phenomenon.
  • this existing method will not only increase the additional loss of the ceiling lamp, but also add too much resistance on the light source board to affect the optical characteristics of the ceiling lamp.
  • the present invention is proposed to provide a control circuit and a power supply circuit for lighting lamps that overcome the above-mentioned problems or at least partially solve the above-mentioned problems.
  • a control circuit which is applied to a power supply circuit of a lighting lamp, and includes a relay power supply, a relay, a controller, and a triode, wherein,
  • the relay includes a relay coil, a first contact, and a second contact.
  • the first contact and the second contact are connected in series to the positive pole of the light source of the lighting fixture, and the relay coil is connected to the relay power supply and Between the collectors of the triode, the emitter of the triode is grounded;
  • the controller has a control pin, the control pin is connected to the base of the triode, and is configured to control the triode to be turned on when a light-on instruction is received, so that the relay coil is connected to the relay power supply, and the relay coil controls The light source is turned on after the first contact and the second contact are turned on; and when the light-off instruction is received, the triode is controlled to be turned off, so that the relay coil is de-energized, the first contact and the second contact Disconnect and prevent current from flowing into the positive electrode of the light source, and the light source is extinguished.
  • control circuit further includes:
  • the blocking diode is connected in series to the negative electrode of the light source and is configured to prevent current from flowing into the negative electrode of the light source when the light source is extinguished.
  • the power circuit of the lighting fixture further includes a wireless control module, which includes a controller and is configured to receive a light-on or light-off instruction from an external remote control or a client of the terminal;
  • a wireless control module which includes a controller and is configured to receive a light-on or light-off instruction from an external remote control or a client of the terminal;
  • control circuit and the wireless control module share the same controller, and the base of the triode is connected to the controller in the wireless control module.
  • a power circuit of a lighting fixture including:
  • the relay of the control circuit is connected in series to the positive pole of the light source through the first contact and the second contact, the relay coil is connected to the relay power supply, and the relay coil After the first contact and the second contact are controlled to turn on, the light source is turned on, the relay coil is de-energized, the first contact and the second contact are disconnected, and the current is prevented from flowing into the positive electrode of the light source. The light source goes out;
  • the blocking diode of the control circuit is connected in series to the negative electrode of the light source, and is configured to prevent current from flowing into the negative electrode of the light source when the light source is extinguished.
  • the power circuit of the lighting fixture further includes a wireless control module and a power module, and a controller connected to the base of the triode is provided in the power module,
  • the wireless control module is configured to receive a light-on instruction or a light-off instruction sent by a user through a remote control or a client terminal of the terminal, and send the light-on instruction or the light-off instruction to the controller in the power module.
  • the power circuit of the lighting fixture further includes:
  • the wireless control module has a controller, the control circuit and the wireless control module share the same controller, and the wireless control module is configured to receive a light-on instruction or a light-off instruction sent by a user through a remote control or a client terminal of the terminal,
  • the controller is used to control the relay coil to be energized to turn on the light source according to a light-on instruction, or to control the relay coil to power off and to turn off the light source according to a light-off instruction.
  • the power circuit of the lighting fixture further includes:
  • the electromagnetic interference filtering circuit has an input end and an output end, the input end of which is connected to the mains power supply, and is configured to filter out the electromagnetic interference signal in the mains power signal;
  • the rectifier bridge has an input terminal and an output terminal.
  • the input terminal is connected to the output terminal of the electromagnetic interference filtering circuit, and the output terminal is connected to the first contact of the relay, and is configured to perform processing on the power signal after filtering the electromagnetic interference signal. Rectify.
  • the power circuit of the lighting fixture further includes:
  • the power factor correction circuit is connected between the rectifier bridge and the first contact of the relay.
  • the power factor correction circuit has an input terminal and an output terminal. The input terminal is connected to the output terminal of the rectifier bridge, and the output terminal Connected to the first contact of the relay and configured to boost the rectified power signal and adjust the power factor of the light source;
  • the power circuit of the lighting fixture further includes:
  • the power drive circuit has an input terminal and an output terminal.
  • the input terminal receives a light-on instruction or a light-off instruction from the wireless control module, and the output terminal is connected to the negative electrode of the light source, and is configured to drive the light source point according to the light-on instruction Turn on or drive the light source to go out according to a light-off command.
  • a relay is set in the power circuit of the lighting lamp, and the relay is connected in series to the anode of the light source of the lighting lamp through its first contact and second contact, and the coil of the relay is controlled to be powered on and off by using a controller. That is to control the pull-in and disconnection of the relay), so that when the controller controls the coil of the relay to be energized, the first contact and the second contact of the relay are turned on, the light source of the lighting fixture is turned on, and the controller controls the relay's When the coil is de-energized, the first contact and the second contact of the relay are disconnected. At this time, the current cannot flow from the anode of the light source to the light source.
  • the present invention adopts the method of cutting off the current loop on the path of the current flowing to the light source, so that the current cannot pass through.
  • the parasitic capacitance flows through the light source, thereby effectively avoiding the problem that the mains current flows to the light source through the parasitic capacitance when the lighting fixture is turned off, and the light source is slightly bright.
  • the control circuit of the present invention will not increase the additional loss of the lighting fixture, nor will it affect the optical characteristics of the lighting fixture.
  • Figure 1 shows a schematic diagram of parasitic capacitance after the lighting fixture is turned off
  • Figure 2 shows a schematic diagram of the parasitic capacitance distribution between the light sources of the lighting fixture and the chassis after the lighting fixture is turned off;
  • Figure 3 shows a schematic structural diagram of a control circuit according to an embodiment of the present invention
  • Fig. 4 shows a schematic structural diagram of a power circuit of a lighting lamp according to an embodiment of the present invention.
  • the embodiments of the present invention provide a control circuit, which is applied to the power circuit of a lighting fixture, and can generally be applied to the power supply circuit of a non-isolated driving lighting fixture with a metal chassis.
  • the lighting fixture here can be a power supply circuit.
  • the ceiling lamp can also be a chandelier, floor lamp, etc.
  • the control circuit includes a relay power supply (5V power supply in Figure 3), a relay RLY1, a controller (not shown in the figure), and a transistor Q1.
  • the relay RLY1 includes a relay coil 11, a first contact and a second contact.
  • the first contact and the second contact are connected in series to the positive electrode of the light source of the lighting fixture.
  • the relay coil 11 is connected to the relay power supply and the collector of the transistor Q1. Meanwhile, the emitter of transistor Q1 is grounded.
  • the "1" terminal of the relay RLY1 represents the first contact, and the "2" terminal represents the second contact.
  • the controller has a control pin CON, which is connected to the base of the transistor Q1.
  • the transistor Q1 When the controller receives the light-on command, the transistor Q1 is controlled to be turned on, so that the relay coil 11 is connected to the relay power supply, and the relay coil 11 controls the light source to light up after the first contact and the second contact are turned on.
  • the controller receives the light-off command, the transistor Q1 is controlled to turn off, so that the relay coil 11 is de-energized, the first contact and the second contact are disconnected and the current is prevented from flowing into the anode of the light source, and the light source is turned off at this time.
  • the transistor Q1 also has the function of current amplification. When the transistor Q1 is turned on, it can amplify the input current to ensure that the collector has a large enough current to pass through, and the relay coil 11 is effective after the relay power is turned on. Control the first contact and the second contact to be connected.
  • the controller controls the relay coil 11 to be de-energized
  • the first contact and the second contact of the relay RLY1 are disconnected.
  • the current cannot flow from the anode of the light source to the light source, that is, in the path where the current flows to the light source.
  • the upper cuts off the current, so that the current cannot flow through the light source through the parasitic capacitance, thereby effectively avoiding the problem of the light source being dimly bright when the mains current flows to the light source through the parasitic capacitance when the lighting fixture is turned off.
  • the control circuit of the present invention will not increase the additional loss of the lighting fixture, nor will it affect the optical characteristics of the lighting fixture.
  • the collector of the transistor Q1 is connected to the relay coil 11 via a resistor R6, and the base is connected to the control pin CON of the controller via a resistor R5.
  • the transistor Q1 can be a transistor with a parameter of 0.5A/40V.
  • the light source of the lighting fixture is a plurality of LEDs connected in parallel, such as LED1, LED2, LED3...LEDn in Figure 3.
  • the LED can be selected as an LED with a parameter of 3.25V/350mA.
  • the embodiment of the present invention has a control circuit for the transistor Q1 and the lighting fixture.
  • the light source is not specifically limited.
  • the controller may be a single-chip microcomputer, of course, other types of controllers may also be used, which is not specifically limited in the embodiment of the present invention.
  • the connection between the lighting fixture and the mains power supply is not cut off after the lighting fixture is turned off. Because the parasitic capacitance existing on the lighting fixture has the function of blocking DC and AC, and the withstand voltage of the lighting fixture is very low, it will flow into the light source. The high voltage of alternating current is prone to soft breakdown of the light source. If the light source has a soft breakdown, there will be current flowing into the light source from the negative pole of the light source after the lighting fixture is turned off, which will also cause the light source to be slightly bright.
  • the embodiment of the present invention can also provide a blocking diode D3 in the control circuit shown in FIG. 3, and connect the blocking diode D3 in series to the cathode of the light source to block the diode.
  • D3 can usually use high-voltage diodes, which can effectively avoid soft breakdown of the light source.
  • the blocking diode D3 can effectively prevent current from flowing into the light source from the negative pole of the light source.
  • the relay RLY1 is connected in series to the anode of the light source and the blocking diode D3 is connected to the cathode of the light source in series to cut off the current loop of the light source from the anode and cathode positions of the light source after the lighting lamp is turned off. Ground to prevent the light source from appearing dimly.
  • the power circuit of the lighting fixture may also include a wireless control module (not shown in Figure 3), the wireless control module includes a controller, and the control circuit can be connected to The wireless control module shares the same controller, and the base of the transistor Q1 is connected to the controller in the wireless control module.
  • the wireless control module can communicate with the remote control or the client of the terminal.
  • the user sends a light on or off instruction to the wireless control module through the remote control or the client of the terminal, and then the controller in the wireless control module controls according to the light on instruction
  • the relay coil 11 is energized to turn on the light source, or the relay coil 11 is controlled to be de-energized according to the light-off command, and then the light source is turned off.
  • the controller of the control circuit may not share the same controller with the wireless control module, and the controller of the control circuit is provided in the power module (not shown in FIG. 3) of the lighting fixture.
  • the wireless control module receives a light-on instruction or a light-off instruction sent by the user through the remote control or the client terminal of the terminal, it sends the light-on instruction or the light-off instruction to the controller in the power module.
  • the controller controls the on and off of the relay coil 11.
  • the lighting fixtures are controlled by wired control, and the lighting fixtures are turned off and on through the wall switch, then the light on or off instruction generated when the wall switch is triggered can be directly sent to the controller .
  • the present invention does not specifically limit the source from which the controller receives the light-on instruction or the light-off instruction.
  • the embodiment of the present invention also provides a power supply circuit for a lighting fixture.
  • the power supply circuit for a lighting fixture includes a light source (LED1, LED2, LED3...LEDn connected in series as shown in Figure 4) and an upper
  • the relay RLY1 of the control circuit 20 is connected in series to the anode of the light source through the first contact and the second contact. After the relay coil 11 is connected to the relay power supply, the relay coil 11 controls the first contact and After the second contact is turned on, the light source is turned on. After the relay coil 11 is de-energized, the first contact and the second contact are disconnected and prevent current from flowing into the positive electrode of the light source. At this time, the light source is turned off.
  • each LED can select an LED with a parameter of 3.25V/350mA, which is not specifically limited in the present invention.
  • the power circuit of the lighting fixture can include a wireless control module 30 and a power supply module, and the controller connected to the base of the transistor Q1 is provided in the power supply module.
  • the wireless control module 30 can receive a light on or off instruction sent by the user through the remote control or the client terminal of the terminal, and then the wireless control module 30 sends the light on or off instruction to the controller in the power module, and then The controller in the power module can control the power-on and power-off of the relay RLY1, thereby controlling the lighting or extinguishing of the light source.
  • the specific control process of the controller can refer to the above embodiments, which is not specifically limited.
  • the control circuit 20 and the wireless control module 30 can be additionally controlled.
  • the same controller is shared, that is, the base of the transistor Q1 in the control circuit 20 is connected to the controller in the wireless control module 30.
  • the wireless control module 30 receives a light-on or light-off instruction sent by the user through the remote control or the client of the terminal, it directly uses the controller to control the relay coil 11 according to the light-on instruction to energize the light source, or according to the light-off instruction The control relay coil 11 is de-energized to turn off the light source.
  • the power supply circuit of the lighting lamp may further include an electromagnetic interference filter circuit 40 and a rectifier bridge 50, and each circuit includes an input terminal and an output terminal.
  • the input end of the electromagnetic interference filtering circuit 40 is connected to the mains, and the output end is connected to the input end of the rectifier bridge 50.
  • the electromagnetic interference filtering circuit 40 can filter out electromagnetic interference (Electromagnetic Interference,
  • the EMI signal is to filter out electromagnetic interference signals in the alternating current AC (Alternating Current) provided by the mains power supply, and then output the power signal after the electromagnetic interference signals are filtered out to the input end of the rectifier bridge 50 through its own output terminal.
  • the output terminal of the rectifier bridge 50 is connected to the first contact of the relay.
  • the rectifier bridge 50 receives the power signal after filtering the electromagnetic interference signal through the input terminal and then performs rectification, and outputs the rectified power signal through its own output terminal to the power factor correction The input terminal of the circuit 60.
  • a power factor correction circuit 60 is provided.
  • the power factor correction circuit 60 is connected between the rectifier bridge 50 and the first contact of the relay.
  • the power factor correction circuit 60 has an input terminal and an output terminal.
  • the output terminal of the power factor correction circuit 60 is connected to the relay RLY1.
  • the power factor correction circuit 60 boosts the power signal and corrects the active power factor correction (Active Power Factor Correction, APFC) of the light source.
  • Active Power Factor Correction Active Power Factor Correction
  • the power factor correction circuit 60 includes an active power factor correction control IC (APFC control IC) with a control terminal, a resistor R2, a MOS tube Q1, a transformer T1, and a diode D1, wherein the gate of the MOS tube Q1 passes through Resistor R2 is connected to the control terminal of the APFC control IC, the source is grounded, and the drain is connected between the anode of the diode and pin 5 of the primary side of the transformer T1.
  • the cathode of the diode D1 is connected to the first contact of the relay RLY1 and the primary side of the transformer T1.
  • Pin 3 is connected to the output end of the rectifier bridge 50, and pin 6 of the secondary side of the transformer T1 is grounded.
  • the power drive circuit 70 of the embodiment of the present invention includes a power control IC, and the power control IC is provided with a zero-crossing detector (not shown in the figure) Out), the 10-pin of the secondary side of the transformer T1 is connected to the zero-crossing detector.
  • the power factor correction circuit 60 can increase the voltage of the rectified power signal by 400V, and can also effectively increase the power factor of the lighting fixture and reduce the existing harmonics of the lighting fixture.
  • the power supply circuit of the lighting fixture may also include a power drive circuit 70.
  • the input end of the power drive circuit 70 receives a light on or off instruction from the wireless control module 30, and outputs The terminal is connected to the negative electrode of the light source, and the power drive circuit 70 can drive the light source to turn on according to the light-on command or drive the light source to turn off according to the light-off command.
  • the power control IC of the power drive circuit 70 has a control terminal.
  • the power drive circuit 70 also includes a resistor R1, a MOS transistor Q2, a resistor R3, a transformer T2, and a diode D2.
  • R1 is connected to the control terminal of the power control IC, the source is grounded through the resistor R3, the drain is connected to the anode of the diode D2 and the 10 pin of the primary side of the transformer T2, and the cathode of the diode D2 is connected to the cathode of the diode D1 and the first contact of the relay RLY1
  • the 6 pin of the primary side of the transformer T2 is connected to the negative electrode of the blocking diode D3, the 3 pin of the secondary side of the transformer T2 is grounded, and the 5 pin is connected to the zero-crossing detector in the power control IC.
  • the power driving circuit 70 can drive the light source to go out or light up according to the light-on command or the light-off command of the wireless control module 30, and can reduce the voltage and constant current of the circuit.
  • the wireless control module 30 sends a light-off instruction or a light-on instruction to the power control IC of the power drive circuit 70, and sends it in the form of PWM (Pulse Width Modulation, pulse width modulation).
  • the power circuit of the lighting lamp also includes a capacitor C1 and a capacitor C2.
  • the anode of the capacitor C1 is connected to the cathode of the diode D1, the cathode of the capacitor C1 is grounded, and the anode of the capacitor C2 is connected between the cathode of the diode D2 and the first contact of the relay RLY1.
  • the capacitor C2 The cathode is connected to the cathode of the blocking diode D3.

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

Abstract

本发明提供了一种控制电路及照明灯具的电源电路，控制电路的继电器包含继电器线圈、第一触点和第二触点，第一触点和第二触点串接至照明灯具的光源的正极，继电器线圈连接于继电器电源和三极管的集电极之间，三极管的发射极接地；控制电路的控制器具有控制引脚，控制引脚连接三极管的基极，配置为在接收到开灯指令时控制三极管导通，使继电器线圈接通继电器电源，继电器线圈控制第一触点和第二触点接通后光源点亮，以及在接收到关灯指令时控制三极管断开，使继电器线圈断电，第一触点和第二触点断开并阻止电流流入光源的正极，光源熄灭。本发明能够有效地避免照明灯具被关闭时市电电流经寄生电容流向光源而出现光源微亮的问题。

Description

一种控制电路及照明灯具的电源电路 技术领域
本发明涉及照明技术领域，特别是涉及一种控制电路及照明灯具的电源电路。
背景技术
现有的铁底盘吸顶灯是通过遥控器或安装APP的终端来实现开、关灯，当采用遥控器或安装APP的终端关闭吸顶灯后，参见图1，吸顶灯的光源板和底盘之间存在寄生电容C11，底盘和房顶之间存在寄生电容C10，由于吸顶灯与市电电源的连接没有断掉，使光源板对大地形成回路，寄生电容C10和C11的容抗比较大，且具有隔直流通交流的作用，因此有微弱的交流电流过吸顶灯的光源，从而使得吸顶灯微亮。图2示出的是光源板上包含多个光源LED(如LED1、LED2、LED3……LEDn)时，各LED与底盘之间存在的寄生电容分布情况，其中，LED1与底盘间存在寄生电容C1，LED2与底盘间存在寄生电容C2，LED3与底盘间存在寄生电容C3等等。
现有技术中是通过在吸顶灯的LED上并联合适阻值的电阻，以使吸顶灯在正常发光时大部分电流通过LED，而少部分电流通过电阻，关灯之后，微弱的电流过电阻，以使吸顶灯不会出现微亮现象。但是，现有的这种方式不仅会增加吸顶灯额外的损耗，而且在光源板上增加过多的电阻也会影响吸顶灯的光学特性。
发明内容
鉴于上述问题，提出了本发明以便提供一种克服上述问题或者至少部分地解决上述问题的一种控制电路及照明灯具的电源电路。
根据本发明的一方面，提供了一种控制电路，应用于照明灯具的电源电路，包括继电器电源、继电器、控制器、三极管，其中，
所述继电器，包含继电器线圈、第一触点和第二触点，所述第一触点和第二触点串接至所述照明灯具的光源的正极，所述继电器线圈连接于继电器电源和三极管的集电极之间，所述三极管的发射极接地；
所述控制器，具有控制引脚，所述控制引脚连接所述三极管的基极，配置为在接收到开灯指令时控制三极管导通，使继电器线圈接通继电器电源， 所述继电器线圈控制第一触点和第二触点接通后所述光源点亮；以及在接收到关灯指令时控制所述三极管断开，使继电器线圈断电，所述第一触点和第二触点断开并阻止电流流入所述光源的正极，所述光源熄灭。
可选地，控制电路还包括：
阻断二极管，串联至所述光源的负极，配置为在所述光源熄灭时阻止电流流入所述光源的负极。
可选地，照明灯具的电源电路还包括无线控制模块，其包括控制器并配置为用于接收外部遥控器或者终端的客户端的开灯指令或关灯指令；
所述控制电路与所述无线控制模块共用同一控制器，所述三极管的基极连接至所述无线控制模块中的控制器。
根据本发明另一方面，还提供了一种照明灯具的电源电路，包括：
光源；
上文任意实施例中所述的控制电路，所述控制电路的继电器通过第一触点和第二触点串接至所述光源的正极，所述继电器线圈接通继电器电源，所述继电器线圈控制第一触点和第二触点接通后所述光源点亮，所述继电器线圈断电，所述第一触点和第二触点断开并阻止电流流入所述光源的正极，所述光源熄灭；
所述控制电路的阻断二极管，串联至所述光源的负极，配置为在所述光源熄灭时阻止电流流入所述光源的负极。
可选地，照明灯具的电源电路还包括无线控制模块和电源模块，与所述三极管的基极连接的控制器设置于所述电源模块中，
无线控制模块，配置为接收用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令，将所述开灯指令或关灯指令发送至所述电源模块中的控制器。
可选地，照明灯具的电源电路还包括：
无线控制模块，具有控制器，所述控制电路与所述无线控制模块共用同一控制器，所述无线控制模块配置为接收用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令，利用所述控制器依据开灯指令控制所述继电器线圈通电使所述光源点亮，或依据关灯指令控制所述继电器线圈断电使所述光源熄灭。
可选地，照明灯具的电源电路还包括：
电磁干扰滤除电路，具有输入端和输出端，其输入端连接市电电源，配 置为滤除所述市电电源信号中的电磁干扰信号；
整流桥，具有输入端和输出端，其输入端连接所述电磁干扰滤除电路的输出端，输出端连接所述继电器的第一触点，配置为对滤除电磁干扰信号后的电源信号进行整流。
可选地，照明灯具的电源电路还包括：
功率因数校正电路，连接于所述整流桥和所述继电器的第一触点之间，所述功率因数校正电路具有输入端和输出端，其输入端连接所述整流桥的输出端，输出端连接所述继电器的第一触点，配置为对整流后的电源信号进行升压并调整光源的功率因数；
可选地，照明灯具的电源电路还包括：
电源驱动电路，具有输入端和输出端，其输入端接收来自所述无线控制模块的开灯指令或关灯指令，输出端连接所述光源的负极，配置为依据开灯指令驱动所述光源点亮或依据关灯指令驱动所述光源熄灭。
本发明实施例在照明灯具的电源电路中设置继电器，且将继电器通过其第一触点和第二触点串接至照明灯具的光源的正极，通过采用控制器控制继电器的线圈通断电(即控制继电器的吸合和断开)，从而在控制器控制继电器的线圈通电时，使继电器的第一触点和第二触点接通，照明灯具的光源点亮，在控制器控制继电器的线圈断电时，继电器的第一触点和第二触点断开，此时电流无法从光源的正极流向光源，本发明采用在电流流向光源的路径上切断电流回路的方式，使得电流无法经寄生电容流过光源，从而有效地避免了照明灯具被关闭时市电电流经寄生电容流向光源而出现光源微亮的问题。进一步地，本发明的控制电路不会增加照明灯具额外的损耗，也不会影响照明灯具的光学特性。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的， 而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1示出了照明灯具关灯后存在寄生电容的示意图；
图2示出了照明灯具关灯后照明灯具的各光源和底盘之间的寄生电容分布示意图；
图3示出了根据本发明一个实施例的控制电路的结构示意图；
图4示出了根据本发明一个实施例的照明灯具的电源电路的结构示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
为解决上述技术问题，本发明实施例提供了一种控制电路，应用于照明灯具的电源电路，通常可以应用于具有金属底盘的非隔离驱动的照明灯具的电源电路，这里的照明灯具可以是吸顶灯，也可以是吊灯、落地灯等等。参见图3，控制电路包括继电器电源(如图3中5V的电源)、继电器RLY1、控制器(图中未示出)、三极管Q1。
继电器RLY1包含继电器线圈11、第一触点和第二触点，第一触点和第二触点串接至照明灯具的光源的正极，继电器线圈11连接于继电器电源和三极管Q1的集电极之间，三极管Q1的发射极接地。图3中继电器RLY1的“1”端表示第一触点，“2”端表示第二触点。
控制器具有控制引脚CON，控制引脚CON连接三极管Q1的基极。当控制器接收到开灯指令时控制三极管Q1导通，使继电器线圈11接通继电器电源，继电器线圈11控制第一触点和第二触点接通后光源点亮。当控制器接收到关灯指令时控制三极管Q1断开，使继电器线圈11断电，第一触点和第二触点断开并阻止电流流入光源的正极，此时光源熄灭。在该实施例中，三极管Q1还具有电流放大的作用，当三极管Q1导通时通过对输入电流放大从而能够保证集电极有足够大的电流经过，且使继电器线圈11在接通继电器电源后有效控制第一触点和第二触点接通。
本发明实施例中，当控制器控制继电器线圈11断电时，继电器RLY1的第一触点和第二触点断开，此时电流无法从光源的正极流向光源，即在电 流流向光源的路径上切断电流，使得电流无法经寄生电容流过光源，从而有效地避免了照明灯具被关闭时市电电流经寄生电容流向光源而出现光源微亮的问题。进一步地，本发明的控制电路不会增加照明灯具额外的损耗，也不会影响照明灯具的光学特性。
在本实施例中，三极管Q1的集电极经电阻R6连接继电器线圈11，基极经电阻R5连接控制器的控制引脚CON。另外，三极管Q1可以选用参数为0.5A/40V的三极管。照明灯具的光源为多个并联的LED，如图3的LED1、LED2、LED3……LEDn，LED可以选用参数为3.25V/350mA的LED，本发明实施例对控制电路的三极管Q1和照明灯具的光源不做具体的限定。
在本发明实施例中，控制器可以采用单片机，当然还可以采用其他类型的控制器，本发明实施例对此不做具体限定。
通常情况，照明灯具在关闭后其与市电电源的连接并没有断掉，由于照明灯具上存在的寄生电容具有隔直流通交流的作用，且照明灯具光源的耐压值很低，流入光源的交流电的电压较高容易使光源出现软击穿。若光源出现软击穿，在照明灯具关闭后便会存在电流从光源的负极流入光源，这也会造成光源的微亮。
为进一步避免照明灯具在关闭后光源微亮的问题，本发明实施例还可以在图3所示的控制电路中设置阻断二极管D3，并将阻断二极管D3串联至光源的负极，阻断二极管D3通常可以采用高压二极管，能够有效地避免光源出现软击穿。当照明灯具在关闭后且光源熄灭时，阻断二极管D3可以有效地阻止电流从光源的负极流入光源。
由此，本发明实施例通过在光源的正极串接继电器RLY1，光源的负极串接阻断二极管D3，以在照明灯具关闭后能从光源的正极和负极位置处切断光源的电流回路，以有效地避免光源出现微亮。
在本发明一实施例中，若照明灯具采用无线控制方式实现开关控制，照明灯具的电源电路还可以包括无线控制模块(图3未示出)，无线控制模块包括控制器，且控制电路可以与无线控制模块共用同一控制器，三极管Q1的基极连接至无线控制模块中的控制器。无线控制模块能够与遥控器或者终端的客户端进行通信，用户通过遥控器或者终端的客户端向无线控制模块发送开灯指令或关灯指令，然后无线控制模块中的控制器依据开灯指令控制继电器线圈11通电，进而使光源点亮，或者依据关灯指令控制继电器线圈11断电，进而使光源熄灭。
在本发明另一实施例中，控制电路的控制器可以不与无线控制模块共用同一控制器，控制电路的控制器设置在照明灯具的电源模块(图3未示出)中。当无线控制模块接收到用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令时，将开灯指令或关灯指令发送至电源模块中的控制器。进而由控制器控制继电器线圈11的通断电。
当然，若照明灯具采用有线控制方式实现开关控制，并通过墙壁开关对照明灯具进行关灯、开灯，那么墙壁开关被触发开关动作时产生的开灯指令或关灯指令可以直接发送给控制器。本发明对控制器接收开灯指令或关灯指令的来源不做具体限定。
基于同一构思，本发明实施例还提供了一种照明灯具的电源电路，参见图4，照明灯具的电源电路包括光源(如图4中所示串联的LED1、LED2、LED3……LEDn)和上文任意实施例中的控制电路20，控制电路20的继电器RLY1通过第一触点和第二触点串接至光源的正极，继电器线圈11接通继电器电源后继电器线圈11控制第一触点和第二触点接通后光源点亮，继电器线圈11断电后第一触点和第二触点断开并阻止电流流入光源的正极，此时光源熄灭。控制电路的阻断二极管D3串联至光源的负极，可以在光源熄灭时阻止电流流入光源的负极。在该实施例中，每个LED可以选用参数为3.25V/350mA的LED，本发明对此不做具体的限定。
在本发明一实施例中，若照明灯具可以采用无线控制方式实现开关控制，照明灯具的电源电路中可以包括无线控制模块30和电源模块，与三极管Q1的基极连接的控制器设置于电源模块中，无线控制模块30可以接收用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令，然后无线控制模块30将开灯指令或关灯指令发送至电源模块中的控制器，进而电源模块中的控制器可以对继电器RLY1的通电和断电进行控制，进而控制光源的点亮或熄灭，控制器的具体控制过程可以参见上文实施例，对此不再具体限定。
在本发明一实施例中，若照明灯具可以采用无线控制方式实现开关控制，且照明灯具的电源电路中的无线控制模块30自带控制器，那么，还可以另控制电路20与无线控制模块30共用同一控制器，即将控制电路20中三极管Q1的基极连接无线控制模块30中的控制器。当无线控制模块30接收到用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令时，直接利用控制器依据开灯指令控制继电器线圈11通电使光源点亮，或者依据关灯指令控制继电器线圈11断电使光源熄灭。
继续参见图4，在本发明一实施例中，照明灯具的电源电路还可以包括电磁干扰滤除电路40、整流桥50，且各电路均包含输入端和输出端。
在该实施例中，电磁干扰滤除电路40的输入端连接市电，输出端连接整流桥50的输入端，电磁干扰滤除电路40可以滤除市电电源信号中的电磁干扰(Electromagnetic Interference，EMI)信号，即滤除市电电源提供的交流电AC(Alternating Current)中的电磁干扰信号，进而将滤除电磁干扰信号后的电源信号通过自身输出端输出至整流桥50的输入端。
整流桥50的输出端连接继电器的第一触点，整流桥50通过输入端接收到滤除电磁干扰信号后的电源信号后进行整流，并将整流后电源信号通过自身输出端输出至功率因数校正电路60的输入端。
继续参见图4，在本发明另一实施例中，当照明灯具的电源电路的功率大于25W时，为提高照明灯具的功率因数并降低照明灯具的谐波，还可以在照明灯具的电源电路中设置功率因数校正电路60，功率因数校正电路60连接于整流桥50和继电器的第一触点之间，功率因数校正电路60具有输入端和输出端，功率因数校正电路60的输出端连接继电器RLY1的第一触点，功率因数校正电路60通过输入端接收到整流后的电源信号后，对电源信号进行升压且对光源的有源功率因数校正(Active Power Factor Correction，APFC)。
在该实施例中，功率因数校正电路60包括具有控制端的有源功率因数校正控制IC(APFC控制IC)、电阻R2，MOS管Q1、变压器T1、二极管D1，其中，MOS管Q1的栅极经电阻R2与APFC控制IC的控制端连接，源极接地，漏极连接二极管的正极和变压器T1原边的5脚之间，二极管D1的负极连接继电器RLY1的第一触点，变压器T1原边的3脚连接整流桥50的输出端，变压器T1副边的6脚接地，本发明实施例的电源驱动电路70包含有电源控制IC，且电源控制IC中设置有过零检测器(图中未示出)，变压器T1副边的10脚连接过零检测器。功率因数校正电路60可以将整流后电源信号的电压升高400V，并且还可以有效地提高照明灯具的功率因数，降低照明灯具的存在谐波。
继续参见图4，在本发明另一实施例中，照明灯具的电源电路还可以包括电源驱动电路70，电源驱动电路70的输入端接收来自无线控制模块30的开灯指令或关灯指令，输出端连接光源的负极，电源驱动电路70可以依据开灯指令驱动光源点亮或依据关灯指令驱动光源熄灭。
在该实施例中，电源驱动电路70的电源控制IC具有控制端，电源驱动电路70还包括电阻R1、MOS管Q2、电阻R3、变压器T2、二极管D2，其中，MOS管Q2的栅极经电阻R1连接电源控制IC的控制端，源极经电阻R3接地，漏极连接二极管D2的正极和变压器T2原边的10脚，二极管D2的负极连接于二极管D1的负极和继电器RLY1的第一触点之间，变压器T2原边的6脚连接阻断二极管D3的负极，变压器T2副边的3脚接地，5脚连接电源控制IC中的过零检测器。电源驱动电路70可以根据无线控制模块30的开灯指令或关灯指令驱动光源熄灭或点亮，并且可以对电路起到降压恒流的作用。本实施例中，无线控制模块30向电源驱动电路70的电源控制IC发送关灯指令或者开灯指令，且采用PWM(Pulse width modulation，脉冲宽度调制)形式发送。
照明灯具的电源电路中还包括电容C1和电容C2，电容C1正极连接二极管D1的负极，电容C1负极接地，电容C2正极连接于二极管D2的负极和继电器RLY1的第一触点之间，电容C2负极连接阻断二极管D3的负极。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：在本发明的精神和原则之内，其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案脱离本发明的保护范围。

Claims (9)

  1. 一种控制电路，应用于照明灯具的电源电路，其中，包括继电器电源、继电器、控制器、三极管，
    所述继电器，包含继电器线圈、第一触点和第二触点，所述第一触点和第二触点串接至所述照明灯具的光源的正极，所述继电器线圈连接于继电器电源和三极管的集电极之间，所述三极管的发射极接地；
    所述控制器，具有控制引脚，所述控制引脚连接所述三极管的基极，配置为在接收到开灯指令时控制三极管导通，使继电器线圈接通继电器电源，所述继电器线圈控制第一触点和第二触点接通后所述光源点亮；以及在接收到关灯指令时控制所述三极管断开，使继电器线圈断电，所述第一触点和第二触点断开并阻止电流流入所述光源的正极，所述光源熄灭。
  2. 根据权利要求1所述的控制电路，其中，还包括：
    阻断二极管，串联至所述光源的负极，配置为在所述光源熄灭时阻止电流流入所述光源的负极。
  3. 根据权利要求1或2所述的控制电路，其中，
    照明灯具的电源电路还包括无线控制模块，其包括控制器并配置为用于接收外部遥控器或者终端的客户端的开灯指令或关灯指令；
    所述控制电路与所述无线控制模块共用同一控制器，所述三极管的基极连接至所述无线控制模块中的控制器。
  4. 一种照明灯具的电源电路，其中，包括：
    光源；
    权利要求2或3所述的控制电路，所述控制电路的继电器通过第一触点和第二触点串接至所述光源的正极，所述继电器线圈接通继电器电源，所述继电器线圈控制第一触点和第二触点接通后所述光源点亮，所述继电器线圈断电，所述第一触点和第二触点断开并阻止电流流入所述光源的正极，所述光源熄灭；
    所述控制电路的阻断二极管，串联至所述光源的负极，配置为在所述光源熄灭时阻止电流流入所述光源的负极。
  5. 根据权利要求4所述的照明灯具的电源电路，其中，还包括无线控制模块和电源模块，与所述三极管的基极连接的控制器设置于所述电源模块中，
    无线控制模块，配置为接收用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令，将所述开灯指令或关灯指令发送至所述电源模块中的控制器。
  6. 根据权利要求4所述的照明灯具的电源电路，其中，还包括：
    无线控制模块，具有控制器，所述控制电路与所述无线控制模块共用同一控制器，所述无线控制模块配置为接收用户通过遥控器或者终端的客户端发送的开灯指令或关灯指令，利用所述控制器依据开灯指令控制所述继电器线圈通电使所述光源点亮，或依据关灯指令控制所述继电器线圈断电使所述光源熄灭。
  7. 根据权利要求5或6所述的照明灯具的电源电路，其中，还包括：
    电磁干扰滤除电路，具有输入端和输出端，其输入端连接市电电源，配置为滤除所述市电电源信号中的电磁干扰信号；
    整流桥，具有输入端和输出端，其输入端连接所述电磁干扰滤除电路的输出端，输出端连接所述继电器的第一触点，配置为对滤除电磁干扰信号后的电源信号进行整流。
  8. 根据权利要求7所述的照明灯具的电源电路，其中，还包括：
    功率因数校正电路，连接于所述整流桥和所述继电器的第一触点之间，所述功率因数校正电路具有输入端和输出端，其输入端连接所述整流桥的输出端，输出端连接所述继电器的第一触点，配置为对整流后的电源信号进行升压并调整光源的功率因数。
  9. 根据权利要求7所述的照明灯具的电源电路，其中，还包括：
    电源驱动电路，具有输入端和输出端，其输入端接收来自所述无线控制模块的开灯指令或关灯指令，输出端连接所述光源的负极，配置为依据开灯指令驱动所述光源点亮或依据关灯指令驱动所述光源熄灭。
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