WO2022007696A1 - Lighting circuit with low standby power consumption, and lighting fixture - Google Patents

Abstract

A lighting circuit with a low standby power consumption, and a lighting fixture. The lighting circuit comprises an AC/DC conversion circuit, a lighting drive circuit, a voltage conversion circuit and a switching circuit. The AC/DC conversion circuit respectively performs different direct-current voltage conversions on mains electricity to obtain a first voltage signal and a second voltage signal; when the lighting drive circuit is powered by the first voltage signal and is in a lighting drive state, the lighting drive circuit drives a lighting lamp to perform lighting; the voltage conversion circuit performs a voltage conversion on the second voltage signal and then supplies power to a wireless module; and when a lighting fixture is in a standby state, the wireless module controls the switching circuit to disconnect a power supply line of the lighting drive circuit, such that the lighting drive circuit stops working. It can be seen that the lighting drive circuit of the present application does not work when the lighting fixture is in a standby state, that is, the lighting drive circuit does not generate standby power consumption when the lighting fixture is in a standby state, thereby reducing the standby power consumption of the whole lighting fixture, and realizing energy conservation and environmental protection.

Description

A low standby power consumption lighting circuit and lighting fixture

This application claims the priority of the Chinese patent application with the application number 202010645429.1 and the invention titled "A Low Standby Power Consumption Lighting Circuit and Lighting Lamp", which was submitted to the China Patent Office on July 7, 2020, the entire contents of which are by reference Incorporated in this application.

technical field

The present application relates to the field of intelligent lighting, and in particular, to a lighting circuit with low standby power consumption and a lighting fixture.

Background technique

At present, intelligent lighting fixtures mainly include: AC/DC (AC/DC) conversion circuit, LED (Light Emitting Diode, light-emitting diode) drive circuit, LED lamp, auxiliary power circuit and wireless module. After the smart lighting fixture is connected to the mains, the distribution of the power lines in it is generally as follows: firstly, the AC/DC conversion circuit converts the connected mains into a DC signal, and then the DC signal is divided into two power supplies, and one is directly supplied The LED driving circuit enables the LED driving circuit to drive the LED lamp lighting; the other circuit performs voltage conversion through the auxiliary power circuit to supply power to the wireless module. It can be seen that the standby power consumption of smart lighting mainly includes the standby power consumption of the LED driving circuit, the standby power consumption of the auxiliary power circuit and the standby power consumption of the wireless module, while the standby power consumption of the LED driving circuit is relatively high, and the auxiliary power consumption The standby power consumption of the power supply circuit and wireless modules leads to high standby power consumption of the whole intelligent lighting fixture, which is not energy-saving and environmentally friendly.

Therefore, how to provide a solution to the above technical problem is a problem that those skilled in the art need to solve at present.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a lighting circuit with low standby power consumption and a lighting fixture. The lighting driving circuit does not work when the lighting fixture is in the standby state, that is, the standby power consumption is not generated when the lighting fixture is in the standby state, thereby reducing the lighting fixture. Standby power consumption of the whole machine, energy saving and environmental protection.

In order to solve the above technical problems, the present application provides a low standby power consumption lighting circuit, which is applied to a lighting fixture including a lighting lamp and a wireless module, including:

The input end is connected to the AC/DC conversion circuit of the commercial power, which is used to convert the commercial power to different DC voltages respectively to obtain the first voltage signal and the second voltage signal;

an illumination drive circuit respectively connected to the first voltage output end of the AC/DC conversion circuit and the illumination lamp, for driving the illumination lamp under the power supply of the first voltage signal and in an illumination drive state to illuminate;

a voltage conversion circuit respectively connected to the second voltage output end of the AC/DC conversion circuit and the wireless module, and used for voltage conversion of the second voltage signal to supply power to the wireless module;

a switch circuit connected to the wireless module on the power supply line of the lighting drive circuit, the wireless module is used to control the switch circuit to cut off the lighting drive when the lighting fixture is in a standby state The power supply line of the circuit, so that the lighting driving circuit stops working.

Preferably, the AC/DC conversion circuit includes a rectifier circuit, a transformer including a primary coil and a tapped secondary coil, a first diode and an AC/DC chip; wherein:

The input end of the rectifier circuit is connected to the commercial power, the output positive end of the rectifier circuit is respectively connected to the first end of the primary coil and the cathode of the first diode, and the output negative end of the rectifier circuit Ground, the second end of the primary coil is respectively connected to the anode of the first diode and the working power end of the AC/DC chip, and the first end of the secondary coil outputs the first voltage signal supplying power to the lighting driving circuit, the center tap end of the secondary coil outputs the second voltage signal for the voltage conversion circuit to perform voltage conversion, and the second end of the secondary coil is grounded;

The AC/DC chip is used to control the energy storage condition of the primary coil according to the voltage output requirement of the transformer, so that the actual output voltage of the transformer meets its voltage output requirement.

Preferably, the transformer further includes an auxiliary coil for obtaining energy from the primary coil; and the AC/DC conversion circuit further includes a second diode, an adjustable resistor and a first capacitor; wherein:

The first end of the auxiliary coil is connected to the anode of the second diode, the second end of the auxiliary coil is grounded, and the cathode of the second diode is connected to the first end of the adjustable resistor , the second end of the adjustable resistor is respectively connected with the standby power supply end of the AC/DC chip and the first end of the first capacitor, and the second end of the first capacitor is grounded;

Wherein, when the lighting fixture is in a normal working state, the AC/DC chip supplies power through its own working power supply terminal; when the lighting fixture is in a standby state, it supplies power through its own standby power supply terminal.

Preferably, the voltage conversion circuit includes:

The input end is connected to the second voltage output end of the AC/DC conversion circuit, and the output end is connected to the LDO chip of the wireless module, which is used for voltage conversion of the second voltage signal according to a preset output voltage threshold, The converted voltage signal is supplied to the wireless module for use; wherein, the second voltage signal>preset output voltage threshold.

Preferably, the switch circuit includes a first resistor, a second resistor, a third resistor, a first switch tube and a second switch tube; wherein:

The first end of the first resistor is respectively connected to the first end of the first switch tube and the first voltage output end of the AC/DC conversion circuit, and the second end of the first switch tube is connected to the first voltage output end of the AC/DC conversion circuit. The power supply end of the lighting drive circuit is connected, the second end of the first resistor is connected to the control end of the first switch tube and the first end of the second resistor respectively, and the second end of the second resistor is connected to the The first end of the second switch tube is connected, the control end of the second switch tube is connected to the first end of the third resistor, and the second end of the third resistor is connected to the wireless module, The second end of the second switch tube is grounded;

The wireless module is specifically configured to control the conduction of the first switch by controlling the conduction of the second switch, so as to control the first switch when the lighting fixture is in a standby state. The switch tube cuts off the power supply line of the lighting driving circuit, so that the lighting driving circuit stops working.

Preferably, the lighting lamps include warm light lamps and cold light lamps;

Correspondingly, the lighting driving circuit includes:

A warm light drive circuit connected to the wireless module and the warm light lamp respectively is used to control the warm light lamp to perform under the power supply of the first voltage signal and the drive of the wireless module. illumination;

The cold light driving circuit respectively connected with the wireless module and the cold light lamp is used for controlling the cold light lamp to illuminate under the power supply of the first voltage signal and the driving of the wireless module.

Preferably, the low standby power consumption lighting circuit further comprises:

The input end is connected to the commercial power, and the output end is connected to the commercial power detection circuit of the wireless module, which is used to detect the voltage signal of the commercial power, and transmit the detected voltage detection signal to the wireless module, so as to Make the wireless module upload the voltage detection signal to the terminal that interacts with itself.

Preferably, the mains detection circuit includes a voltage monitoring chip, a voltage divider circuit for stepping down the mains to the allowable range of the input voltage of the voltage monitoring chip, a Zener diode, a light-emitting diode and an optocoupler transistor. The optocoupler, the fourth resistor, the fifth resistor, the second capacitor and the third capacitor; wherein:

The first end of the voltage divider circuit is connected to the live wire of the commercial power, and the second end of the voltage divider circuit is respectively connected to the cathode of the Zener diode and the VCC terminal of the voltage monitoring chip. The Zener diode The anode of the second capacitor is respectively connected to the neutral line of the commercial power, the GND terminal of the voltage monitoring chip and the first terminal of the second capacitor, and the second terminal of the second capacitor is respectively connected to the first terminal of the fourth resistor. connected with the anode of the light-emitting diode, the cathode of the light-emitting diode is respectively connected with the second end of the fourth resistor and the Reset end of the voltage monitoring chip, and the collector of the optocoupler transistor is connected with the second end of the fourth resistor respectively. The first end of the fifth resistor is connected to the first end of the third capacitor and the common end is connected to the wireless module, the second end of the fifth resistor is connected to the output voltage of the voltage conversion circuit, the The emitter of the optocoupler transistor is connected to the second end of the third capacitor and the common end is grounded;

The voltage monitoring chip is used to control the light-emitting diode to turn off when the commercial power voltage reaches a preset voltage monitoring point, so as to output a high-level signal to the wireless module.

Preferably, the wireless module is a Bluetooth module.

In order to solve the above technical problems, the present application also provides a lighting fixture, including a lighting lamp and a wireless module, and any of the above-mentioned low standby power consumption lighting circuits.

The present application provides a lighting circuit with low standby power consumption, including an AC/DC conversion circuit, a lighting driving circuit, a voltage conversion circuit and a switch circuit. The AC/DC conversion circuit converts the commercial power to different DC voltages, respectively, to obtain a first voltage signal and a second voltage signal; the lighting driving circuit drives the lighting lamp for lighting when powered by the first voltage signal and in the lighting driving state; The voltage conversion circuit converts the second voltage signal to supply power to the wireless module; when the wireless module is in a standby state, the wireless module controls the switch circuit to cut off the power supply line of the lighting drive circuit to stop the lighting drive circuit from working. It can be seen that the lighting driving circuit of the present application does not work when the lighting fixture is in a standby state, that is, no standby power consumption is generated when the lighting fixture is in a standby state, thereby reducing the standby power consumption of the lighting fixture and saving energy and protecting the environment.

The present application also provides a lighting fixture, which has the same beneficial effects as the above-mentioned lighting circuit.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the prior art and the drawings required in the embodiments. Obviously, the drawings in the following description are only some of the drawings in the present application. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a lighting circuit with low standby power consumption provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a specific structure of a lighting circuit with low standby power consumption provided by an embodiment of the present application;

3 is a schematic diagram of a specific structure of a lighting driving circuit provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a specific structure of a mains detection circuit according to an embodiment of the present application.

detailed description

The core of the present application is to provide a lighting circuit with low standby power consumption and a lighting fixture. The lighting driving circuit does not work when the lighting fixture is in the standby state, that is, the standby power consumption is not generated when the lighting fixture is in the standby state, thereby reducing the lighting fixture. Standby power consumption of the whole machine, energy saving and environmental protection.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Please refer to FIG. 1 , which is a schematic structural diagram of a lighting circuit with low standby power consumption provided by an embodiment of the present application.

The low standby power consumption lighting circuit is applied to lighting fixtures including lighting lamps and wireless modules, including:

The input end is connected to the AC/DC conversion circuit 100 of the commercial power, which is used to convert the commercial power to different DC voltages respectively to obtain the first voltage signal and the second voltage signal;

The lighting driving circuit 200 connected to the first voltage output terminal of the AC/DC conversion circuit 100 and the lighting lamp respectively, is used for driving the lighting lamp for lighting under the power supply of the first voltage signal and in the lighting driving state;

The voltage conversion circuit 300 respectively connected with the second voltage output end of the AC/DC conversion circuit 100 and the wireless module is used for voltage conversion of the second voltage signal to supply power to the wireless module;

The switch circuit 400 is arranged on the power supply line of the lighting drive circuit 200 and connected to the wireless module. The wireless module is used to control the switch circuit 400 to cut off the power supply line of the lighting drive circuit 200 when the lighting fixture is in a standby state, so that the lighting The drive circuit 200 stops working.

Specifically, the low standby power consumption lighting circuit of the present application includes an AC/DC conversion circuit 100, a lighting driving circuit 200, a voltage conversion circuit 300 and a switch circuit 400, and its working principle is as follows:

The input end of the AC/DC conversion circuit 100 is connected to the commercial power, which can convert the input commercial power to different DC voltages respectively, so as to obtain two voltage signals with different voltage values, which are the first voltage signal and the second voltage respectively. Signal.

The first voltage signal is output to the lighting driving circuit 200 from the first voltage output terminal of the AC/DC conversion circuit 100 to supply power to the lighting driving circuit 200 . When the lighting driving circuit 200 is powered by the first voltage signal and in the lighting driving state, the lighting lamp is driven to perform lighting.

The second voltage signal is output to the voltage conversion circuit 300 from the second voltage output terminal of the AC/DC conversion circuit 100 . After receiving the second voltage signal, the voltage conversion circuit 300 performs voltage conversion on the second voltage signal, and provides the converted voltage signal to the wireless module, so as to provide the wireless module with electrical energy required for its operation.

Based on this, considering that the lighting driving circuit 200 is also in standby when the lighting fixture is in the standby state, the lighting driving circuit 200 will generate high standby power consumption, so the present application also sets a switch circuit 400 on the power supply line of the lighting driving circuit 200, The switch state of the switch circuit 400 is controlled by the wireless module. Specifically, the wireless module controls the switch circuit 400 to cut off the power supply line of the lighting drive circuit 200 when the lighting fixture is in a standby state, so that the lighting drive circuit 200 stops working, that is, when the lighting fixture is in a standby state. In the standby state, the lighting driving circuit 200 stops working and does not generate standby power consumption.

The present application provides a lighting circuit with low standby power consumption, including an AC/DC conversion circuit, a lighting driving circuit, a voltage conversion circuit and a switch circuit. The AC/DC conversion circuit converts the commercial power to different DC voltages, respectively, to obtain a first voltage signal and a second voltage signal; the lighting driving circuit drives the lighting lamp for lighting when powered by the first voltage signal and in the lighting driving state; The voltage conversion circuit converts the second voltage signal to supply power to the wireless module; when the wireless module is in a standby state, the wireless module controls the switch circuit to cut off the power supply line of the lighting drive circuit to stop the lighting drive circuit from working. It can be seen that the lighting driving circuit of the present application does not work when the lighting fixture is in a standby state, that is, no standby power consumption is generated when the lighting fixture is in a standby state, thereby reducing the standby power consumption of the lighting fixture and saving energy and protecting the environment.

On the basis of the above-mentioned embodiment:

Please refer to FIG. 2 , which is a schematic diagram of a specific structure of a lighting circuit with low standby power consumption provided by an embodiment of the present application.

As an optional embodiment, the AC/DC conversion circuit 100 includes a rectifier circuit, a transformer T1 including a primary coil and a tapped secondary coil, a first diode D1 and an AC/DC chip U1; wherein:

The input end of the rectifier circuit is connected to the commercial power, the output positive end of the rectifier circuit is respectively connected to the first end of the primary coil and the cathode of the first diode D1, the output negative end of the rectifier circuit is grounded, and the second end of the primary coil is respectively It is connected with the anode of the first diode D1 and the working power end of the AC/DC chip U1, the first end of the secondary coil outputs a first voltage signal to supply power to the lighting driving circuit 200, and the center tap end of the secondary coil outputs a second voltage signal. The voltage signal is supplied to the voltage conversion circuit 300 for voltage conversion, and the second end of the secondary coil is grounded;

The AC/DC chip U1 is used to control the energy storage condition of the primary coil according to the voltage output requirement of the transformer T1, so that the actual output voltage of the transformer T1 meets its voltage output requirement.

Specifically, the AC/DC conversion circuit 100 of the present application includes a rectifier circuit, a transformer T1, a first diode D1 for anti-reaction, and an AC/DC chip U1, and its working principle is:

The input end of the rectifier circuit (full-bridge rectifier circuit BD1 in Figure 2) is connected to the mains, which can rectify the input mains, and input the rectified mains rectified signal to the primary coil of the transformer T1 (transformer T1). The coil between pins 1 and 3), based on the principle of electromagnetic induction, the secondary coil of transformer T1 (the coil between pins 6 and 7 of transformer T1) also has current flowing, and the first coil of the secondary coil The voltage signal output by the terminal (pin 6 of the transformer T1) is used as the first voltage signal to supply power to the lighting driving circuit 200; the voltage signal output by the center tap terminal of the secondary coil (pin 8 of the transformer T1) is used as the second voltage signal , for the voltage conversion circuit 300 to perform voltage conversion.

Based on this, the second end of the primary coil of the transformer T1 (pin 3 of the transformer T1) is connected to the working power end of the AC/DC chip U1, and the AC/DC chip U1 can control the storage of the primary coil according to the voltage output requirement of the transformer T1. The actual output voltage of the transformer T1 can meet its voltage output requirements.

In addition, as shown in Figure 2, the application can also add between the mains input end and the rectifier circuit: a fuse F1 for fusing the circuit line when the circuit is overcurrent; a thermistor RT1 for temperature measurement; When the circuit is over-voltage, the voltage is clamped and the varistor VR1 is used to absorb excess current; the capacitor CX1 is used for filtering voltage regulation; the common mode inductor LF1 is used for filtering electromagnetic interference in the circuit. The application can also add between the rectifier circuit and the primary coil of the transformer T1: a π-type filter circuit composed of a capacitor EC1, an inductance L1 and a capacitor EC2; a filter circuit composed of a parallel resistor R8 and a capacitor C1, thereby improving the circuit performance. Safety and reliability.

As an optional embodiment, the transformer T1 further includes an auxiliary coil for obtaining energy from the primary coil; and the AC/DC conversion circuit 100 further includes a second diode D2, an adjustable resistor R4 and a first capacitor C7; in:

The first end of the auxiliary coil is connected to the anode of the second diode D2, the second end of the auxiliary coil is grounded, the cathode of the second diode D2 is connected to the first end of the adjustable resistor R4, and the second end of the adjustable resistor R4 is connected to the ground. The two terminals are respectively connected to the standby power terminal of the AC/DC chip U1 and the first terminal of the first capacitor C7, and the second terminal of the first capacitor C7 is grounded;

The AC/DC chip U1 supplies power through its own working power supply terminal when the lighting fixture is in a normal working state; and supplies power through its own standby power supply terminal when the lighting fixture is in a standby state.

Further, the transformer T1 of the present application further includes an auxiliary coil (the coil between pins 4 and 5 of the transformer T1 ), and the AC/DC conversion circuit 100 further includes a second diode D2 for anti-reaction, and an adjustable resistor R4 And the first capacitor C7, its working principle is:

When there is current flowing in the primary coil of the transformer T1, based on the principle of electromagnetic induction, current also flows in the auxiliary coil. The electric energy in the auxiliary coil is supplied to the standby power terminal of the AC/DC chip U1 through the adjustable resistor R4. Based on the adjustable resistance value of the adjustable resistor R4, the voltage and current input to the standby power terminal of the AC/DC chip U1 can be adjusted. .

Based on this, the AC/DC chip U1 can supply power through the primary coil of the transformer T1 at high voltage, or through the auxiliary coil at low voltage. Coil high-voltage power supply; when the lighting fixture is in the standby state, the AC/DC chip U1 switches the internal power supply path to supply low-voltage power through the auxiliary coil, thereby reducing the standby power consumption of the AC/DC chip U1. It should be noted that when the AC/DC chip U1 is powered by the auxiliary coil at low voltage, the voltage and current input from the standby power supply terminal of the AC/DC chip U1 can be reduced to the minimum allowable voltage by adjusting the resistance value of the adjustable resistor R4. current to maximize the standby power consumption of the AC/DC chip U1.

More specifically, as shown in Figure 2, the AC/DC chip U1 can use the LNK6663K chip, and the D pin of the LNK6663K chip is used as the working power supply end of the chip for high-voltage power supply; the BP pin is used as the standby power supply end of the chip for low-voltage power supply. For power supply; CP pin is connected with resistor R6 and capacitor C8 in series and capacitor C9 connected in parallel with the series circuit composed of resistor R6 and capacitor C8 for internal filtering of the chip; FB pin is connected with adjustable resistor R10 and adjustable resistor R11 The voltage divider circuit for dividing the voltage of the auxiliary coil and the capacitor C6 for filtering voltage regulation are composed. The purpose is: LNK6663K chip determines the actual output voltage of the transformer T1 based on the voltage signal fed back by the FB pin, and according to the transformer T1 The voltage output demand of the primary coil controls the energy storage of the primary coil, so that the actual output voltage of the transformer T1 meets its voltage output demand, thereby realizing negative feedback control; the PD pin is connected in parallel with a capacitor C5 and an adjustable resistor R7 to adjust the switching frequency. effect.

In addition, the auxiliary coil side of the transformer T1 can also be added: a resistor R9 for current limiting and a capacitor EC3 for filter voltage regulation to improve the voltage stability of the auxiliary coil side.

As an optional embodiment, the voltage conversion circuit 300 includes:

The LDO chip U5, whose input end is connected to the second voltage output end of the AC/DC conversion circuit 100 and whose output end is connected to the wireless module, is used for voltage conversion of the second voltage signal according to the preset output voltage threshold, and converts the converted signal into the LDO chip U5. The voltage signal is supplied to the wireless module for use; wherein, the second voltage signal>the preset output voltage threshold.

Specifically, the voltage conversion circuit 300 of the present application includes a low-cost LDO (Low dropout regulator, low dropout linear regulator) chip U5, and its working principle is:

The input end of the LDO chip U5 is connected to the second voltage output end of the AC/DC conversion circuit 100 to input the second voltage signal output by the AC/DC conversion circuit 100 , and the output end of the LDO chip U5 is connected to the wireless module to connect The second voltage signal supplies power to the wireless module after voltage conversion.

Since the output voltage of the LDO chip U5 is a fixed value after being set, the LDO chip U5 performs voltage conversion on the second voltage signal according to the preset output voltage threshold to output a voltage equal to the preset output voltage threshold. It should be noted that the input voltage of the LDO chip U5 needs to be greater than the output voltage, that is, the second voltage signal>the preset output voltage threshold.

In addition, in order to reduce the loss of the power conversion itself of the LDO chip U5, the present application makes the voltage difference between the input voltage and the output voltage of the LDO chip U5 as small as possible (provided that the chip output voltage can be stabilized), and the specific implementation means are as follows: : When designing the secondary coil of transformer T1, the output voltage of pins 7 and 8 of transformer T1 can be reduced by reducing the number of coil turns between pins 7 and 8 of transformer T1, that is, the input voltage of LDO chip U5 can be reduced , so as to reduce the voltage difference between the input voltage and the output voltage of the LDO chip U5, thereby reducing the loss of the power conversion itself of the LDO chip U5.

Moreover, it should be noted that the setting of the output voltage threshold of the LDO chip U5 is different from the auxiliary power supply circuit in the prior art. The original auxiliary power supply circuit requires an output of 3.3V to ensure the normal operation of the auxiliary power supply circuit. The setting of the output voltage threshold of the LDO chip U5 is not limited to a voltage value, as long as the output voltage of the chip is stable, for example, it can be set to 2.5V, which is lower than the output voltage required by the original auxiliary power supply circuit, that is, the wireless mode The power supply voltage of the group is reduced. Since the current consumed by the wireless module is the same under different power supply voltages, the power consumption of the wireless module can be reduced by reducing the power supply voltage of the wireless module.

Of course, the voltage conversion circuit 300 of the present application may also be a DC-DC voltage conversion circuit that can achieve lower power consumption, which is not specifically limited in the present application, and is selected based on comprehensive consideration of power consumption costs.

In addition, as shown in Figure 2, the input and output terminals of LDO chip U5 can also be added: diode D4 for rectification; capacitor EC7 for stabilizing the input voltage of LDO chip U5; A filter circuit for filtering to stabilize the output voltage of the LDO chip U5, thereby improving the input and output stability of the LDO chip U5.

As an optional embodiment, the switch circuit 400 includes a first resistor R21, a second resistor R22, a third resistor R35, a first switch transistor Q1 and a second switch transistor Q2; wherein:

The first end of the first resistor R21 is respectively connected to the first end of the first switch tube Q1 and the first voltage output end of the AC/DC conversion circuit 100 , and the second end of the first switch tube Q1 is connected to the power supply of the lighting driving circuit 200 . The second end of the first resistor R21 is connected to the control end of the first switch tube Q1 and the first end of the second resistor R22 respectively, and the second end of the second resistor R22 is connected to the first end of the second switch tube Q2. connected, the control end of the second switch tube Q2 is connected to the first end of the third resistor R35, the second end of the third resistor R35 is connected to the wireless module, and the second end of the second switch tube Q2 is grounded;

The wireless module is specifically used to control the conduction state of the first switch tube Q1 by controlling the conduction state of the second switch tube Q2, so as to control the first switch tube Q1 to cut off the lighting driving circuit 200 when the lighting fixture is in a standby state the power supply line, so that the lighting driving circuit 200 stops working.

Specifically, the switch circuit 400 of the present application includes a first resistor R21, a second resistor R22, a third resistor R35, a first switch transistor Q1 and a second switch transistor Q2, and the first switch transistor Q1 is a PMOS transistor and the second switch transistor Taking the NPN transistor as an example, the working principle of the switch circuit 400 will be described:

The wireless module outputs a driving signal STB for controlling the conduction state of the second switch transistor Q2. When the driving signal STB output by the wireless module is a high-level signal, the high-level signal is limited by the third resistor R35 and then input to the base of the second switch tube Q2, the second switch tube Q2 is turned on, and the second resistor The second terminal of R22 is grounded, the first switch transistor Q1 is turned on, and the first voltage signal output by the first voltage output terminal of the AC/DC conversion circuit 100 can be transmitted to the power terminal of the lighting driving circuit 200, so that the lighting driving circuit 200 Enter into work; when the driving signal STB output by the wireless module is a low level signal, the second switch tube Q2 is turned off, and the first switch tube Q1 is turned off, so as to cut off the power supply line of the lighting driving circuit 200, so that the lighting driving circuit 200 stops working .

Therefore, the wireless module can control the conduction state of the first switch tube Q1 by controlling the conduction state of the second switch tube Q2, so as to control the first switch tube Q1 to cut off the lighting driving circuit 200 when the lighting fixture is in the standby state The power supply circuit is connected to make the lighting driving circuit 200 stop working, so that the lighting driving circuit 200 does not generate standby power consumption when the lighting fixture is in a standby state, which saves energy and is environmentally friendly.

In addition, as shown in FIG. 2 , the switch circuit 400 may further include a filter circuit composed of a capacitor C22 and a resistor R29 connected in parallel. Between the secondary coil of the transformer T1 and the switch circuit 400 can also be added: a diode D5 for rectification; a capacitor C10 and a resistor R24 connected in parallel with the diode D5 for protecting the diode D5; a capacitor EC5 and a resistor R25 connected in parallel A filter circuit is used to improve the power supply stability of the lighting driving circuit 200 .

As an optional embodiment, the lighting lamps include warm light lamps and cold light lamps;

Correspondingly, the lighting driving circuit 200 includes:

a warm light driving circuit respectively connected to the wireless module and the warm light, for controlling the warm light to illuminate under the power supply of the first voltage signal and the driving of the wireless module;

The cold light driving circuit respectively connected with the wireless module and the cold light lamp is used for controlling the cold light lamp to illuminate under the power supply of the first voltage signal and the driving of the wireless module.

Specifically, the lighting lamps of the present application include warm light lamps (such as warm light LED lamps) and cold light lamps (such as cold light LED lamps), then the lighting driving circuit 200 includes a warm light driving circuit and a cold light driving circuit (the specific circuit is shown in FIG. 3 ). The structure of the warm light drive circuit and the cold light drive circuit are the same), and its working principle is:

The warm light driving circuit is powered by the first voltage signal output by the first voltage output terminal of the AC/DC conversion circuit 100, and after the warm light driving circuit is powered on, the wireless module outputs PWM (Pulse Width Modulation, pulse width modulation) The signal drives the warm light driving circuit to control the warm light for lighting.

Similarly, the cold light drive circuit is powered by the first voltage signal output from the first voltage output terminal of the AC/DC conversion circuit 100, and after the cold light drive circuit is powered on, the wireless module outputs a PWM signal to drive the cold light drive circuit to control the cold light lamp. Lighting.

As an optional embodiment, the low standby power consumption lighting circuit further includes:

The input terminal is connected to the mains power supply, and the output terminal is connected to the mains power detection circuit, which is used to detect the voltage signal of the mains power supply, and transmit the detected voltage detection signal to the wireless module, so that the wireless module can detect the voltage The detection signal is uploaded to the terminal that interacts with itself.

Further, the low standby power consumption lighting circuit of the present application also includes a commercial power detection circuit, and its working principle is:

The input end of the mains detection circuit is connected to the mains, which can detect the voltage signal of the input mains, obtain the voltage detection signal, and transmit the voltage detection signal to the wireless module, so that the wireless module uploads the voltage detection signal to the A terminal that interacts with itself for users to view.

Please refer to FIG. 4 , which is a schematic diagram of a specific structure of a commercial power detection circuit provided by an embodiment of the present application.

As an optional embodiment, the mains detection circuit includes a voltage monitoring chip U3, a voltage divider circuit for stepping down the mains to the allowable range of the input voltage of the voltage monitoring chip U3, a Zener diode ZD1, including a light-emitting diode and the optocoupler U4 of the optocoupler transistor, the fourth resistor R16, the fifth resistor R17, the second capacitor C4 and the third capacitor C19; wherein:

The first end of the voltage divider circuit is connected to the live wire of the mains, the second end of the voltage divider circuit is respectively connected to the cathode of the Zener diode ZD1 and the VCC terminal of the voltage monitoring chip U3, and the anode of the Zener diode ZD1 is respectively connected to the mains. The zero line, the GND terminal of the voltage monitoring chip U3 and the first terminal of the second capacitor C4 are connected. It is respectively connected with the second end of the fourth resistor R16 and the Reset end of the voltage monitoring chip U3, and the collector of the optocoupler transistor is respectively connected with the first end of the fifth resistor R17 and the first end of the third capacitor C19 and the common end is connected into the wireless module, the second end of the fifth resistor R17 is connected to the output voltage of the voltage conversion circuit 300, the emitter of the optocoupler transistor is connected to the second end of the third capacitor C19 and the common end is grounded;

The voltage monitoring chip U3 is used to control the light-emitting diode to turn off when the mains voltage reaches the preset voltage monitoring point, so as to output a high-level signal to the wireless module.

Specifically, the mains detection circuit of the present application includes a voltage monitoring chip U3, a voltage divider circuit, a Zener diode ZD1 for voltage regulation, a photocoupler U4, a fourth resistor R16, a fifth resistor R17, a second capacitor C4 and The third capacitor C19 works as follows:

As shown in FIG. 4 , the mains detected by the mains detection circuit is specifically the mains signal filtered by the capacitor CX1 and the common-mode inductor LF1 . The mains signal is input to the VCC terminal of the voltage monitoring chip U3 after being divided by the voltage divider circuit composed of the resistor R13, the resistor R14 and the resistor R15. The purpose is to step down the mains signal to the allowable range of the input voltage of the voltage monitoring chip U3. In order to ensure the normal operation of the voltage monitoring chip U3.

The voltage monitoring chip U3 monitors the voltage signal representing the mains voltage input by its own VCC terminal in real time. When the mains voltage does not reach the preset voltage monitoring point, it controls the light-emitting diode to turn on and the optocoupler transistor to turn on to output a low-level voltage. The voltage detection signal ADC is sent to the wireless module; when the mains voltage reaches the preset voltage monitoring point, the light-emitting diode is controlled to turn off, and the optocoupler transistor is turned off to output a high-level voltage detection signal ADC to the wireless module.

It should be noted that, on the one hand, the wireless module receives the signals (such as the voltage detection signal ADC) transmitted by the low standby power consumption lighting circuit, and the purpose is to upload these signals to the terminal that interacts with itself for the user to view; on the other hand, it receives The signals (such as PWM signals, driving signals STB) transmitted by the terminal interacting with itself are intended to control the operation of the low standby power consumption lighting circuit accordingly based on these signals.

As an optional embodiment, the wireless module is a Bluetooth module.

Specifically, the wireless module of the present application can be selected but not limited to the Bluetooth module, which is not particularly limited in the present application.

It should be noted that the model of each device and the device value of each device in Figure 2, Figure 3 and Figure 4 are only a selection method for each device, and each device can choose other models and other device values. There is no special limitation, as long as the functions to be implemented by the low standby power consumption lighting circuit are satisfied.

The present application also provides a lighting fixture, including a lighting lamp and a wireless module, and any of the above-mentioned low standby power consumption lighting circuits.

For the introduction of the lighting fixture provided in the present application, please refer to the above-mentioned embodiments of the low-standby power consumption lighting circuit, which will not be repeated in the present application.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, this application is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A low standby power consumption lighting circuit, characterized in that it is applied to a lighting fixture including a lighting lamp and a wireless module, including:

   The input end is connected to the AC/DC conversion circuit of the commercial power, which is used to convert the commercial power to different DC voltages respectively to obtain the first voltage signal and the second voltage signal;

   an illumination drive circuit respectively connected to the first voltage output end of the AC/DC conversion circuit and the illumination lamp, for driving the illumination lamp under the power supply of the first voltage signal and in an illumination drive state to illuminate;

   a voltage conversion circuit respectively connected to the second voltage output end of the AC/DC conversion circuit and the wireless module, and used for voltage conversion of the second voltage signal to supply power to the wireless module;

   a switch circuit connected to the wireless module on the power supply line of the lighting drive circuit, the wireless module is used to control the switch circuit to cut off the lighting drive when the lighting fixture is in a standby state The power supply line of the circuit, so that the lighting driving circuit stops working.
2. The low standby power consumption lighting circuit of claim 1, wherein the AC/DC conversion circuit comprises a rectifier circuit, a transformer including a primary coil and a tapped secondary coil, a first diode and an AC /DC chip; where:

   The input end of the rectifier circuit is connected to the commercial power, the output positive end of the rectifier circuit is respectively connected to the first end of the primary coil and the cathode of the first diode, and the output negative end of the rectifier circuit Ground, the second end of the primary coil is respectively connected to the anode of the first diode and the working power end of the AC/DC chip, and the first end of the secondary coil outputs the first voltage signal supplying power to the lighting driving circuit, the center tap end of the secondary coil outputs the second voltage signal for the voltage conversion circuit to perform voltage conversion, and the second end of the secondary coil is grounded;

   The AC/DC chip is used to control the energy storage condition of the primary coil according to the voltage output requirement of the transformer, so that the actual output voltage of the transformer meets its voltage output requirement.
3. The low standby power consumption lighting circuit of claim 2, wherein the transformer further comprises an auxiliary coil for obtaining energy from the primary coil; and the AC/DC conversion circuit further comprises a second diode tube, adjustable resistor and first capacitor; wherein:

   The first end of the auxiliary coil is connected to the anode of the second diode, the second end of the auxiliary coil is grounded, and the cathode of the second diode is connected to the first end of the adjustable resistor , the second end of the adjustable resistor is respectively connected with the standby power supply end of the AC/DC chip and the first end of the first capacitor, and the second end of the first capacitor is grounded;

   Wherein, when the lighting fixture is in a normal working state, the AC/DC chip supplies power through its own working power supply terminal; when the lighting fixture is in a standby state, it supplies power through its own standby power supply terminal.
4. The low standby power consumption lighting circuit of claim 1, wherein the voltage conversion circuit comprises:

   The input end is connected to the second voltage output end of the AC/DC conversion circuit, and the output end is connected to the LDO chip of the wireless module, which is used for voltage conversion of the second voltage signal according to a preset output voltage threshold, The converted voltage signal is supplied to the wireless module for use; wherein, the second voltage signal>preset output voltage threshold.
5. The low standby power consumption lighting circuit of claim 1, wherein the switch circuit comprises a first resistor, a second resistor, a third resistor, a first switch tube and a second switch tube; wherein:

   The first end of the first resistor is respectively connected to the first end of the first switch tube and the first voltage output end of the AC/DC conversion circuit, and the second end of the first switch tube is connected to the first voltage output end of the AC/DC conversion circuit. The power supply end of the lighting drive circuit is connected, the second end of the first resistor is connected to the control end of the first switch tube and the first end of the second resistor respectively, and the second end of the second resistor is connected to the The first end of the second switch tube is connected, the control end of the second switch tube is connected to the first end of the third resistor, and the second end of the third resistor is connected to the wireless module, The second end of the second switch tube is grounded;

   The wireless module is specifically configured to control the conduction of the first switch by controlling the conduction of the second switch, so as to control the first switch when the lighting fixture is in a standby state. The switch tube cuts off the power supply line of the lighting driving circuit, so that the lighting driving circuit stops working.
6. The lighting circuit with low standby power consumption according to claim 1, wherein the lighting lamps comprise warm light lamps and cold light lamps;

   Correspondingly, the lighting driving circuit includes:

   A warm light drive circuit connected to the wireless module and the warm light lamp respectively is used to control the warm light lamp to perform under the power supply of the first voltage signal and the drive of the wireless module. illumination;

   The cold light driving circuit respectively connected with the wireless module and the cold light lamp is used for controlling the cold light lamp to illuminate under the power supply of the first voltage signal and the driving of the wireless module.
7. The low standby power consumption lighting circuit according to claim 1, wherein the low standby power consumption lighting circuit further comprises:

   The input end is connected to the commercial power, and the output end is connected to the commercial power detection circuit of the wireless module, which is used to detect the voltage signal of the commercial power, and transmit the detected voltage detection signal to the wireless module, so as to Make the wireless module upload the voltage detection signal to the terminal that interacts with itself.
8. The low standby power consumption lighting circuit according to claim 7, wherein the mains detection circuit comprises a voltage monitoring chip, which is used to step down the mains power to an input voltage allowable range of the voltage monitoring chip. voltage divider circuit, zener diode, optocoupler including light emitting diode and optocoupler triode, fourth resistor, fifth resistor, second capacitor and third capacitor; wherein:

   The first end of the voltage divider circuit is connected to the live wire of the commercial power, and the second end of the voltage divider circuit is respectively connected to the cathode of the Zener diode and the VCC terminal of the voltage monitoring chip. The Zener diode The anode of the second capacitor is respectively connected to the neutral line of the commercial power, the GND terminal of the voltage monitoring chip and the first terminal of the second capacitor, and the second terminal of the second capacitor is respectively connected to the first terminal of the fourth resistor. connected with the anode of the light-emitting diode, the cathode of the light-emitting diode is respectively connected with the second end of the fourth resistor and the Reset end of the voltage monitoring chip, and the collector of the optocoupler transistor is connected with the second end of the fourth resistor respectively. The first end of the fifth resistor is connected to the first end of the third capacitor and the common end is connected to the wireless module, the second end of the fifth resistor is connected to the output voltage of the voltage conversion circuit, the The emitter of the optocoupler transistor is connected to the second end of the third capacitor and the common end is grounded;

   The voltage monitoring chip is used to control the light-emitting diode to turn off when the commercial power voltage reaches a preset voltage monitoring point, so as to output a high-level signal to the wireless module.
9. The lighting circuit with low standby power consumption according to claim 1, wherein the wireless module is a Bluetooth module.
10. A lighting fixture is characterized in that it comprises a lighting lamp and a wireless module, and further comprises the low standby power consumption lighting circuit according to any one of claims 1-9.

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