Illumination driving circuit and illumination system

Abstract

The present application provides an illumination driving circuit and an illumination system, belonging to the technical field of electronic circuits. Among them, the first end of the first communication module is connected to the data sending port of the single-chip microcomputer, the first end of the second communication module is connected to the data receiving port of the single-chip microcomputer, the second ends of both the first communication module and the second communication module are connected to a reference voltage, the third ends of the first communication module and the second communication module are connected to the dimming port of an external network device, and the single-chip microcomputer is also connected to the control end of the illumination driving power supply; the first communication module converts the first digital pulse signal sent by the single-chip microcomputer into a first dimming signal readable by the external network device, and the second communication module converts the second dimming signal sent by the external network device into a second digital pulse signal readable by the single-chip microcomputer. The present application can achieve the effect of breaking the communication barrier between the single-chip microcomputer and the external network device, and further improving the accuracy and reliability of the dimming effect of the illumination system.

Description

Technical Field

[0001] This application relates to the technical field of electronic circuits, and more particularly, to an illumination driving circuit and an illumination system. Background Art

[0002] With the continuous development of light emitting diode (LED) lighting technology, people's requirements for the lighting effect of LEDs are also getting higher and higher. Among them, the lighting dimming technology, as an important part of LED lighting, can meet the lighting needs of different application scenarios.

[0003] In related technologies, generally, an external network device sends a dimming signal to a single-chip microcomputer control circuit, and the single-chip microcomputer control circuit controls the lighting effect of the corresponding LED lamp based on the received dimming signal. However, when controlling the lighting effect of an LED lamp based on related technologies, the external network device communicates directly with the single-chip microcomputer, but not every type of dimming signal in the dimming signal sent by the external network device can be recognized by the single-chip microcomputer, which results in the single-chip microcomputer being unable to receive certain types of dimming signals, and further causes the single-chip microcomputer to be unable to accurately send a dimming instruction to the corresponding lighting fixture. Therefore, the solutions of related technologies have problems of poor accuracy and reliability of the dimming effect of light emitting diodes. Summary of the Invention

[0004] The purpose of this application is to provide an illumination driving circuit and an illumination system, which can break the communication barrier between the single-chip microcomputer and the external network device, and thus improve the accuracy and reliability of the dimming effect of the illumination system.

[0005] The embodiments of this application are implemented as follows:

[0006] In the first aspect of the embodiments of this application, an illumination driving circuit is provided. The illumination driving circuit includes: an illumination driving power supply, a first communication module, a second communication module, and a single-chip microcomputer;

[0007] The first end of the first communication module is connected to the data sending port of the single-chip microcomputer. The second end of the first communication module is used to access a reference voltage. The third end of the first communication module is connected to the dimming port of the external network device;

[0008] The first end of the second communication module is connected to the data receiving port of the single-chip microcomputer. The second end of the second communication module is used to access a reference voltage. The third end of the second communication module is connected to the dimming port of the external network device;

[0009] The output end of the single-chip microcomputer is connected to the control end of the illumination driving power supply;

[0010] The first communication module is used to receive the first digital pulse signal sent by the single-chip microcomputer and send the first dimming signal to the external network device under the action of the first digital pulse signal;

[0011] The second communication module is used to receive the second dimming signal sent by the external network device, convert the second dimming signal into a second digital pulse signal, and send the second digital pulse signal to the single-chip microcomputer. The single-chip microcomputer is used to adjust the light source drive voltage of the lighting drive power supply under the action of the second digital pulse signal.

[0012] As a possible implementation manner, the first communication module includes: a filtering unit, a conduction control component, and a first conduction component;

[0013] The first end of the filtering unit and the input end of the conduction control component are both used to access the reference voltage. The second end of the filtering unit is connected to the control end of the conduction control component, and the third end of the filtering unit is connected to the data sending port of the single-chip microcomputer;

[0014] The output end of the conduction control component is connected to the control end of the first conduction component. The input end of the first conduction component is connected to the dimming port of the external network device. The output end of the conduction control component and the output end of the first conduction component are both grounded;

[0015] The conduction control component is used to conduct or turn off under the action of the first digital pulse signal; when the first digital pulse signal accessed by the control end of the conduction control component is at a low level, the conduction control component conducts under the action of the first digital pulse signal, and the first conduction component conducts under the action of the electrical signal output after the conduction control component conducts, so that the first dimming signal received by the dimming port of the external network device is at a low level; when the first digital pulse signal accessed by the control end of the conduction control component is at a high level, the conduction control component turns off under the action of the first digital pulse signal, and the first conduction component turns off under the action of the electrical signal output after the conduction control component turns off, so that the first dimming signal received by the dimming port of the external network device is at a high level.

[0016] As a possible implementation manner, the second communication module includes: a rectifying and filtering unit, a second conduction component, a third conduction component, and a voltage dividing unit;

[0017] The first end of the rectifying and filtering unit is connected to the dimming port of the external network device. The second end of the rectifying and filtering unit is connected to the control end of the second conduction component. The third end of the rectifying and filtering unit, the output end of the second conduction component, and the output end of the third conduction component are all grounded;

[0018] The first end of the voltage dividing unit is used to access the reference voltage. The second end of the voltage dividing unit is respectively connected to the input end of the second conduction component and the control end of the third conduction component. The third end of the voltage dividing unit is connected to the data receiving port of the single-chip microcomputer, and the input end of the third conduction component is connected to the data receiving port of the single-chip microcomputer;

[0019] The second conduction component is used to conduct or cut off under the action of the second dimming signal. The voltage dividing unit is used to divide the reference voltage. When the second conduction component conducts under the action of the second dimming signal, the third conduction component conducts under the action of the reference voltage divided by the voltage dividing unit, and the second digital pulse signal output by the third end of the voltage dividing unit to the data receiving port of the single-chip microcomputer is a low-level signal. When the second conduction component cuts off under the action of the second dimming signal, the third conduction component cuts off under the action of the reference voltage divided by the voltage dividing unit, and the second digital pulse signal output by the third end of the voltage dividing unit to the data receiving port of the single-chip microcomputer is a high-level signal.

[0020] As a possible implementation, the filtering unit includes: a first resistor and a second resistor;

[0021] One end of the first resistor is used to access the reference voltage. The other end of the first resistor is respectively connected to one end of the second resistor and the control end of the conduction control component. The other end of the second resistor is connected to the data sending port of the single-chip microcomputer.

[0022] As a possible implementation, the conduction control component includes: a PNP triode, a third resistor, and a fourth resistor;

[0023] The base of the PNP triode is connected to the second end of the filtering unit. The emitter of the PNP triode is used to access the reference voltage. The collector of the PNP triode is connected to one end of the third resistor. The other end of the third resistor is respectively connected to the control end of the first conduction component and one end of the fourth resistor. The other end of the fourth resistor is grounded.

[0024] As a possible implementation, the first conduction component includes: a first NPN triode and a fifth resistor;

[0025] One end of the fifth resistor is connected to the dimming port of the external network device. The other end of the fifth resistor is connected to the collector of the first NPN triode. The base of the first NPN triode is connected to the output end of the conduction control component. The emitter of the first NPN triode is grounded.

[0026] As a possible implementation, the rectifying and filtering unit includes: a rectifying tube, a sixth resistor, and a seventh resistor;

[0027] The output end of the rectifier tube is connected to the dimming port of the external network device. The input end of the rectifier tube is connected to one end of the sixth resistor. The other end of the sixth resistor is respectively connected to one end of the seventh resistor and the control end of the second conduction component. The other end of the seventh resistor is grounded.

[0028] As a possible implementation manner, the voltage dividing unit includes: an eighth resistor and a ninth resistor;

[0029] One end of the eighth resistor and one end of the ninth resistor are both used to access the reference voltage. The other end of the eighth resistor is respectively connected to the input end of the second conduction component and the control end of the third conduction component. The other end of the ninth resistor is respectively connected to the data receiving port of the single-chip microcomputer and the input end of the third conduction component.

[0030] As a possible implementation manner, the second conduction component includes: a second NPN transistor, and the third conduction component includes: a third NPN transistor;

[0031] The base of the second NPN transistor is connected to the second end of the rectifying and filtering unit. The collector of the second NPN transistor is connected to the other end of the eighth resistor. The emitters of the second NPN transistor and the third NPN transistor are both grounded;

[0032] The base of the third NPN transistor is connected to the other end of the eighth resistor. The collector of the third NPN transistor is connected to the data receiving port of the single-chip microcomputer.

[0033] In the second aspect of the embodiments of the present application, a lighting system is provided. The lighting system includes: the lighting driving circuit described in the first aspect above, an external network device, and at least one lighting device.

[0034] The beneficial effects of the embodiments of the present application include:

[0035] A lighting drive circuit provided by an embodiment of the present application consists of a lighting drive power supply, a first communication module, a second communication module, and a single-chip microcomputer. The input end of the first communication module is connected to the data sending port of the single-chip microcomputer. The input end of the second communication module and the output end of the first communication module are both connected to the dimming port of an external network device. The output end of the second communication module is connected to the data receiving port of the single-chip microcomputer. Both the first communication module and the second communication module are connected to a preset reference voltage. Among them, the first communication module is used to receive the first digital pulse signal sent by the single-chip microcomputer to the external network device, convert the first digital pulse signal into a corresponding first dimming signal, and send it to the dimming port of the external network device. The second communication module is used to receive the second dimming signal sent by the external network device to the single-chip microcomputer, convert the second dimming signal into a corresponding second digital pulse signal, and send it to the single-chip microcomputer. The single-chip microcomputer sends a corresponding dimming control instruction to the lighting drive power supply according to the received second digital pulse signal, so that the lighting drive power supply outputs a light source drive voltage adapted to the dimming control instruction, realizing the dimming effect of the lighting fixture. This can enable the single-chip microcomputer to efficiently identify any type of dimming signal sent by the external network device, improving the signal compatibility of the lighting system. In this way, the communication barrier between the single-chip microcomputer and the external network device can be broken, and then the accuracy and reliability of the dimming effect of the lighting system can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0037] Figure 1 Schematic diagram of the structure of the first lighting drive circuit provided by an embodiment of the present application;

[0038] Figure 2 Schematic diagram of the structure of a single-chip microcomputer provided by an embodiment of the present application;

[0039] Figure 3 Schematic diagram of the structure of the second lighting drive circuit provided by an embodiment of the present application;

[0040] Figure 4 Schematic diagram of the structure of the third lighting drive circuit provided by an embodiment of the present application;

[0041] Figure 5 Schematic diagram of the structure of the fourth lighting drive circuit provided by an embodiment of the present application;

[0042] Figure 6Schematic diagram of the fifth lighting drive circuit provided by the embodiment of the present application;

[0043] Figure 7 Schematic diagram of a lighting system provided by the embodiment of the present application.

[0044] Description of the drawings: 10: Lighting drive circuit; 101: Lighting drive power supply; 102: First communication module; 1021: Filter unit; 211: First resistor; 212: Second resistor; 1022: Conductivity control component; 221: PNP triode; 222: Third resistor; 223: Fourth resistor; 1023: First conduction component; 231: First NPN triode; 232: Fifth resistor; 103: Second communication module; 1031: Rectification and filtering unit; 311: Rectifier tube; 312: Sixth resistor; 313: Seventh resistor; 1032: Second conduction component; 321: Second NPN triode; 1033: Third conduction component; 331: Third NPN triode; 1034: Voltage division unit; 341: Eighth resistor; 342: Ninth resistor; 104: Single-chip microcomputer; 20: Lighting system; 201: External network device; 202: Lighting device. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0047] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0048] In the description of this application, it should be noted that the terms "first", "second", "third", etc. are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0049] Currently, generally, the external network device directly sends a dimming signal to the single-chip microcomputer control circuit. The single-chip microcomputer control circuit controls the driving voltage of the lighting driving power supply based on the received dimming control signal, thereby realizing the corresponding lighting effect. However, there are various types of dimming signals sent by the external network device in this solution, and not every type of dimming signal can be directly read by the single-chip microcomputer, which results in the single-chip microcomputer control circuit being unable to receive certain types of dimming signals, and further causes the single-chip microcomputer to be unable to accurately control the dimming voltage of the lighting driving power supply, thus resulting in poor reliability and accuracy of the dimming effect of the lighting system.

[0050] Therefore, the embodiment of this application provides a lighting driving circuit. The input end of the first communication module is connected to the data sending port of the single-chip microcomputer, the output end of the second communication module is connected to the data receiving port of the single-chip microcomputer, the output end of the first communication module and the input end of the second communication module are both connected to the dimming port of the external network device, and the single-chip microcomputer is also connected to the control end of the lighting driving power supply. The first communication module receives the first digital pulse signal sent by the single-chip microcomputer and converts the first digital pulse signal into a first dimming signal and sends it to the dimming port of the external network device; the second communication module receives the second dimming signal sent by the external network device and converts the second dimming signal into a second digital pulse signal and sends it to the single-chip microcomputer. The single-chip microcomputer adjusts the light source driving voltage of the lighting driving power supply under the action of the second digital pulse signal to realize the dimming effect of the lighting system. In this way, the communication barrier between the single-chip microcomputer and the external network device can be broken, and the accuracy and reliability of the dimming effect of the lighting system can be improved.

[0051] The following will explain in detail the lighting driving circuit and the lighting system provided by the embodiment of this application with reference to the accompanying drawings.

[0052] Figure 1 It is a schematic structural diagram of a lighting driving circuit provided by this application. See Figure 1, an embodiment of the present application provides an illumination driving circuit 10, and the illumination driving circuit 10 includes: an illumination driving power supply 101, a first communication module 102, a second communication module 103, and a single-chip microcomputer 104.

[0053] The first end of the first communication module 102 is connected to the data sending port of the single-chip microcomputer 104. The second end of the first communication module 102 is used to access a reference voltage, and the third end of the first communication module 102 is connected to the dimming port of the external network device 201.

[0054] Optionally, the first end of the first communication module 102 serves as the input end of the first communication module 102, the second end of the first communication module 102 serves as the reference voltage input end of the first communication module 102, the third end of the first communication module 102 serves as the output end of the first communication module 102, the data sending port serves as the digital pulse signal sending port of the single-chip microcomputer 104, and the dimming port of the external network device 201 refers to the port for the external network device 201 to send and receive dimming signals. Among them, the external network device 201 is a device that sends dimming signals to the illumination driving circuit 10, and the external network device 201 can be implemented by peripheral devices such as a dimming parameter box, and the present application does not make specific limitations on this.

[0055] Optionally, the reference voltage is a voltage preset by the user. The reference voltage is mainly used to supply power for the signal conversion process of the first communication module 102 and the second communication module 103. The reference voltage can be 5V, 10V, etc., and the present application does not make specific limitations on this.

[0056] Optionally, based on the digital pulse signal accessed at the first end and the reference voltage received at the second end, the first communication module 102 converts the digital pulse signal sent by the single-chip microcomputer 104 into an analog signal readable by the external network device 201, and sends the converted dimming signal to the dimming port of the external network device 201.

[0057] The first end of the second communication module 103 is connected to the data receiving port of the single-chip microcomputer 104. The second end of the second communication module 103 is used to access a reference voltage, and the third end of the second communication module 103 is connected to the dimming port of the external network device 201.

[0058] Optionally, the first end of the second communication module 103 serves as the output end of the second communication module 103, the third end of the second communication module 103 serves as the input end of the second communication module 103, the second end of the second communication module 103 serves as the reference voltage input end of the second communication module 103, and the data receiving port refers to the port for the single-chip microcomputer 104 to receive digital pulse signals.

[0059] Optionally, based on the dimming signal received at the third terminal and the reference voltage received at the second terminal, the second communication module 103 converts the dimming signal sent by the external network device 201 to the single-chip microcomputer 104 into a digital pulse signal readable by the single-chip microcomputer 104, and sends the converted digital pulse signal to the data receiving port of the single-chip microcomputer 104.

[0060] It should be noted that the reference voltage received at the second terminal of the first communication module 102 and the reference voltage received at the second terminal of the second communication module 103 may have the same voltage value or different voltage values, which are specifically determined according to the application scenarios of the first communication module 102 and the second communication module 103. This application does not make specific limitations on this.

[0061] The output terminal of the single-chip microcomputer 104 is connected to the control terminal of the lighting drive power supply 101.

[0062] Optionally, based on the received dimming signal, the single-chip microcomputer 104 sends a corresponding control signal to the lighting drive power supply 101, so that the lighting drive power supply 101 outputs a drive voltage adapted to the dimming effect indicated by the dimming signal, and the lighting fixture emits light under the action of the drive voltage output by the lighting drive power supply 101.

[0063] Among them, a single-chip microcomputer control circuit is integrated in the single-chip microcomputer 104, and the single-chip microcomputer 104 sends and receives instructions based on the single-chip microcomputer control circuit to implement the lighting drive control function.

[0064] The first communication module 102 is used to receive the first digital pulse signal sent by the single-chip microcomputer 104, and send the first dimming signal to the external network device 201 under the action of the first digital pulse signal.

[0065] Optionally, the first digital pulse signal refers to the digital pulse signal sent by the single-chip microcomputer 104 to the external network device 201, and the first dimming signal refers to the analog signal obtained by the first communication module 102 after performing digital-to-analog conversion on the first digital pulse signal. Among them, after receiving the first digital pulse signal sent by the single-chip microcomputer 104, the first communication module 102 converts the first digital pulse signal into a corresponding first dimming signal through the internal circuit structure of the first communication module 102, and sends the converted first dimming signal to the dimming port of the external network device 201.

[0066] It should be noted that the digital pulse signal can be in the form of high and low levels or in the form of a pulse width modulation signal PWM wave. This application does not make specific limitations on this.

[0067] The second communication module 103 is configured to receive a second dimming signal sent by an external network device 201, convert the second dimming signal into a second digital pulse signal, and send the second digital pulse signal to the single-chip microcomputer 104. The single-chip microcomputer 104 is configured to adjust the light source drive voltage of the lighting drive power supply 101 under the action of the second digital pulse signal.

[0068] Optionally, the second dimming signal refers to a dimming instruction sent by the external network device 201 to the single-chip microcomputer 104. The form of the second dimming signal can be any one of a dimming voltage of 0V to 10V, a pulse width modulation signal PWM wave, and a resistance dimming signal. This application does not make specific limitations on this.

[0069] Optionally, the second digital pulse signal refers to a digital pulse signal obtained by the second communication module 103 after performing analog-to-digital conversion on the second dimming signal. After receiving the second dimming signal sent by the external network device 201, the second communication module 103 performs analog-to-digital conversion on the second dimming signal based on the internal circuit structure of the second communication module 103 to obtain a second digital pulse signal matching the second dimming signal, and sends the converted second digital pulse signal to the single-chip microcomputer 104. The single-chip microcomputer 104 controls the lighting drive power supply 101 based on the received second digital pulse signal to adjust the light source drive voltage of the lighting drive power supply 101.

[0070] Optionally, the light source drive voltage refers to the drive voltage provided by the lighting drive power supply 101 for the lighting device. The lighting drive power supply 101 can be provided by the power grid system. This application does not make specific limitations on this.

[0071] Among them, the first dimming signal is sent by the first communication module 102 to the external network device 201, that is, the first dimming signal is the dimming signal received by the external network device 201; the second dimming signal is sent by the external network device 201 to the second communication module 103, that is, the second dimming signal is the dimming signal sent by the external network device 201.

[0072] In the embodiment of the present application, a lighting drive circuit is composed of a lighting drive power supply, a first communication module, a second communication module, and a single-chip microcomputer. The input end of the first communication module is connected to the data sending port of the single-chip microcomputer. The input end of the second communication module and the output end of the first communication module are both connected to the dimming port of an external network device. The output end of the second communication module is connected to the data receiving port of the single-chip microcomputer. Both the first communication module and the second communication module are connected to a preset reference voltage. Among them, the first communication module is used to receive the first digital pulse signal sent by the single-chip microcomputer to the external network device, convert the first digital pulse signal into a corresponding first dimming signal, and send it to the dimming port of the external network device. The second communication module is used to receive the second dimming signal sent by the external network device to the single-chip microcomputer, convert the second dimming signal into a corresponding second digital pulse signal, and send it to the single-chip microcomputer. The single-chip microcomputer sends a corresponding dimming control instruction to the lighting drive power supply according to the received second digital pulse signal, so that the lighting drive power supply outputs a light source drive voltage adapted to the dimming control instruction, realizing the dimming effect of the lighting fixture. This can enable the single-chip microcomputer to efficiently identify any type of dimming signal sent by the external network device, improving the signal compatibility of the lighting system. In this way, the communication barrier between the single-chip microcomputer and the external network device can be broken, and further the accuracy and reliability of the dimming effect of the lighting system can be improved.

[0073] In an optional implementation manner, referring to Figure 2 , the single-chip microcomputer 104 in the lighting drive circuit 10 provided by the embodiment of the present application includes: a data sending port TX and a data receiving port RX. The single-chip microcomputer 104 sends a digital pulse signal to the external network device via the data sending port and receives the dimming signal sent by the external network device via the data receiving port.

[0074] In an optional implementation manner, referring to Figure 3 , the first communication module 102 in the lighting drive circuit 10 provided by the embodiment of the present application includes: a filtering unit 1021, a conduction control component 1022, and a first conduction component 1023.

[0075] The first end of the filtering unit 1021 and the input end of the conduction control component 1022 are both used to connect to the reference voltage. The second end of the filtering unit 1021 is connected to the control end of the conduction control component 1022. The third end of the filtering unit 1021 is connected to the data sending port of the single-chip microcomputer 104.

[0076] Optionally, the filtering unit 1021 is used to filter the reference voltage provided by the external power supply and the first digital pulse signal output by the single-chip microcomputer 104 to reduce the influence of white noise on the digital-to-analog conversion.

[0077] The output end of the conduction control component 1022 is connected to the control end of the first conduction component 1023. The input end of the first conduction component 1023 is connected to the dimming port of the external network device 201. The output end of the conduction control component 1022 and the output end of the first conduction component 1023 are both grounded.

[0078] The conduction control component 1022 is used to conduct or turn off under the action of the first digital pulse signal. When the first digital pulse signal connected to the control end of the conduction control component 1022 is at a low level, the conduction control component 1022 conducts under the action of the first digital pulse signal, and the first conduction component 1023 conducts under the action of the electrical signal output after the conduction control component 1022 conducts, so that the first dimming signal received by the dimming port of the external network device 201 is at a low level. When the first digital pulse signal connected to the control end of the conduction control component 1022 is at a high level, the conduction control component 1022 turns off under the action of the first digital pulse signal, and the first conduction component 1023 turns off under the action of the electrical signal output after the conduction control component 1022 turns off, so that the first dimming signal received by the dimming port of the external network device 201 is at a high level.

[0079] It should be noted that the high level of the first dimming signal means that the voltage value of the first dimming signal output by the first communication module 102 is greater than 10V, and the low level of the first dimming signal means that the voltage value of the first dimming signal output by the first communication module 102 is less than 10V. The first digital pulse signal output by the single-chip microcomputer 104 being at a low level can be 0 level, and the first digital pulse signal output by the single-chip microcomputer 104 being at a high level can be 1. This application does not make specific limitations on this.

[0080] In an optional implementation manner, refer to Figure 4 In the lighting drive circuit 10 provided by the embodiment of this application, the second communication module 103 includes: a rectification and filtering unit 1031, a second conduction component 1032, a third conduction component 1033, and a voltage dividing unit 1034.

[0081] The first end of the rectification and filtering unit 1031 is connected to the dimming port of the external network device 201. The second end of the rectification and filtering unit 1031 is connected to the control end of the second conduction component 1032. The third end of the rectification and filtering unit 1031, the output end of the second conduction component 1032, and the output end of the third conduction component 1033 are all grounded.

[0082] The first end of the voltage dividing unit 1034 is used to access a reference voltage. The second end of the voltage dividing unit 1034 is respectively connected to the input end of the second conduction component 1032 and the control end of the third conduction component 1033. The third end of the voltage dividing unit 1034 is connected to the data receiving port of the single-chip microcomputer 104. The input end of the third conduction component 1033 is connected to the data receiving port of the single-chip microcomputer 104.

[0083] The second conduction component 1032 is used to conduct or turn off under the action of the second dimming signal, and the voltage dividing unit 1034 is used to divide the reference voltage; when the second conduction component 1032 conducts under the action of the second dimming signal, the third conduction component 1033 conducts under the action of the reference voltage divided by the voltage dividing unit 1034, and the second digital pulse signal output by the third terminal of the voltage dividing unit 1034 to the data receiving port of the single-chip microcomputer 104 is a low-level signal; when the second conduction component 1032 turns off under the action of the second dimming signal, the third conduction component 1033 turns off under the action of the reference voltage divided by the voltage dividing unit 1034, and the second digital pulse signal output by the third terminal of the voltage dividing unit 1034 to the data receiving port of the single-chip microcomputer 104 is a high-level signal.

[0084] It should be noted that the high level of the second dimming signal means that the voltage value of the dimming signal output by the second communication module 103 is greater than 10V, and the low level of the second dimming signal means that the voltage value of the dimming signal received by the second communication module 103 is less than 10V. The second digital pulse signal received by the single-chip microcomputer 104 being a low level can be 0 level, and the second digital pulse signal received by the single-chip microcomputer 104 being a high level can be 1. The present application does not make specific limitations on this.

[0085] In an optional implementation manner, refer to Figure 5 , the filtering unit 1021 in the first communication module 102 of the lighting drive circuit 10 provided in the embodiment of the present application includes: a first resistor 211 and a second resistor 212.

[0086] One end of the first resistor 211 is used to connect to the reference voltage, the other end of the first resistor 211 is respectively connected to one end of the second resistor 212 and the control end of the conduction control component 1022, and the other end of the second resistor 212 is connected to the data sending port of the single-chip microcomputer 104.

[0087] In an optional implementation manner, refer to Figure 5 , the conduction control component 1022 in the first communication module 102 of the lighting drive circuit 10 provided in the embodiment of the present application includes: a PNP triode 221, a third resistor 222, and a fourth resistor 223.

[0088] The base of the PNP triode 221 is connected to the second terminal of the filtering unit 1021, the emitter of the PNP triode 221 is used to connect to the reference voltage, the collector of the PNP triode 221 is connected to one end of the third resistor 222, the other end of the third resistor 222 is respectively connected to the control end of the first conduction component 1023 and one end of the fourth resistor 223, and the other end of the fourth resistor 223 is grounded.

[0089] Optionally, the third resistor 222 and the fourth resistor 223 are used to divide the voltage of the electrical signal emitted by the collector of the PNP triode 221, so that the electrical signal applied to the first NPN triode 231 can control the first NPN triode 231 and the PNP triode 221 to conduct or disconnect simultaneously.

[0090] In an alternative embodiment, refer to Figure 5 , in the lighting drive circuit 10 provided by the embodiment of the present application, the first conduction component 1023 in the first communication module 102 includes: a first NPN triode 231 and a fifth resistor 232.

[0091] One end of the fifth resistor 232 is connected to the dimming port of the external network device 201, the other end of the fifth resistor 232 is connected to the collector of the first NPN triode 231, the base of the first NPN triode 231 is connected to the output end of the conduction control component 1022, and the emitter of the first NPN triode 231 is grounded.

[0092] Optionally, the fifth resistor 232 serves as a pull-down resistor. When the first NPN triode 231 conducts, the fifth resistor 232 will pull down the first dimming signal of the dimming port of the external network device 201 to a low level.

[0093] Optionally, the first resistor 211, the second resistor 212, the PNP triode 221, the third resistor 222, the fourth resistor 223, the first NPN triode 231, and the fifth resistor 232 together form the first communication module 102. The first communication module 102 serves as a data sending port in the lighting drive circuit 10, and is used to convert the first digital pulse signal sent by the data sending port of the single-chip microcomputer 104 into a corresponding first dimming signal and send it to the external network device 201. When the first digital pulse signal sent by the single-chip microcomputer 104 is at a low level, the level signal filtered by the first resistor 211 and the second resistor 212 controls the PNP triode 221 to conduct. At the same time, the electrical signal output by the first NPN triode 231 is divided by the third resistor 222 and the fourth resistor 223 to control the second NPN triode 321 to conduct, and the first dimming signal sent to the external network device 201 through the fifth resistor is a low-level signal; when the first digital pulse signal sent by the single-chip microcomputer 104 is at a high level, the level signal filtered by the first resistor 211 and the second resistor 212 controls the PNP triode 221 to turn off. At the same time, the electrical signal output by the first NPN triode 231 is divided by the third resistor 222 and the fourth resistor 223 to control the second NPN triode 321 to turn off, and the first dimming signal sent to the external network device 201 through the fifth resistor is a high-level signal.

[0094] In an alternative embodiment, refer to Figure 6, in the lighting drive circuit 10 provided by the embodiment of the present application, the rectifying and filtering unit 1031 in the second communication module 103 includes: a rectifying diode 311, a sixth resistor 312, and a seventh resistor 313.

[0095] The output end of the rectifying diode 311 is connected to the dimming port of the external network device 201, the input end of the rectifying diode 311 is connected to one end of the sixth resistor 312, the other end of the sixth resistor 312 is respectively connected to one end of the seventh resistor 313 and the control end of the second conduction component 1032, and the other end of the seventh resistor 313 is grounded.

[0096] Optionally, the rectifying diode 311 is used to rectify the second dimming signal input by the external network device 201 to the second communication module 103, and filter and divide the voltage of the rectified second dimming signal through the sixth resistor 312 and the seventh resistor 313, and control the on and off of the second conduction component 1032 based on the second dimming signal after voltage division.

[0097] In an optional implementation manner, refer to Figure 6 , in the lighting drive circuit 10 provided by the embodiment of the present application, the voltage dividing unit 1034 in the second communication module 103 includes: an eighth resistor 341 and a ninth resistor 342.

[0098] One end of the eighth resistor 341 and one end of the ninth resistor 342 are both used to access the reference voltage. The other end of the eighth resistor 341 is respectively connected to the input end of the second conduction component 1032 and the control end of the third conduction component 1033, and the other end of the ninth resistor 342 is respectively connected to the data receiving port of the single-chip microcomputer 104 and the input end of the third conduction component 1033.

[0099] Optionally, the eighth resistor 341 and the ninth resistor 342 are used to divide the reference voltage provided by the external power supply, control the on and off of the third conduction component 1033 based on the divided reference voltage, and output the corresponding second digital pulse signal.

[0100] In an optional implementation manner, refer to Figure 6 , in the lighting drive circuit 10 provided by the embodiment of the present application, the second conduction component 1032 in the second communication module 103 includes: a second NPN transistor 321, and the third conduction component 1033 includes: a third NPN transistor 331.

[0101] The base of the second NPN transistor 321 is connected to the second end of the rectifying and filtering unit 1031, the collector of the second NPN transistor 321 is connected to the other end of the eighth resistor 341, and the emitters of the second NPN transistor 321 and the third NPN transistor 331 are both grounded.

[0102] The base of the third NPN transistor 331 is connected to the other end of the eighth resistor 341, and the collector of the third NPN transistor 331 is connected to the data receiving port of the single-chip microcomputer 104.

[0103] Optionally, the rectifier diode 311, the sixth resistor 312, the seventh resistor 313, the second NPN transistor 321, the third NPN transistor 331, the eighth resistor 341, and the ninth resistor 342 together form a second communication module 103. The second communication module 103 serves as a data receiving port in the lighting drive circuit 10 for receiving the dimming signal sent by the external network device 201. When the level of the second dimming signal sent by the external network device is higher than 10V, the rectifier diode 311 is broken down, and the second NPN transistor 321 conducts. At the same time, part of the charge after the reference voltage provided by the external power supply is divided is discharged to the ground, the third NPN transistor 331 conducts, the reference voltage provided by the external power supply is pulled down, and the second digital pulse signal output by the ninth resistor 342 to the data receiving port of the single-chip microcomputer 104 is a low-level signal. When the level of the second dimming signal sent by the external network device is lower than 10V, the rectifier diode 311 cannot be broken down, the second NPN transistor 321 is turned off. At the same time, the reference voltage provided by the external power supply is not discharged, the third NPN transistor 331 is turned off, the reference voltage provided by the external power supply remains unchanged, and the second digital pulse signal output by the ninth resistor 342 to the data receiving port of the single-chip microcomputer 104 is a high-level signal.

[0104] In an alternative embodiment, refer to Figure 7 , the embodiment of the present application provides a lighting system 20, which includes: a lighting drive circuit 10, an external network device 201, and at least one lighting device 202.

[0105] Among them, the lighting drive circuit 10 is respectively connected to the external network device 201 and each lighting device 202, and the lighting drive circuit 10 adjusts the dimming effect of each lighting device 202 under the action of the dimming signal sent by the external network device 201.

[0106] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0107] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lighting driving circuit, characterized in that: The lighting driving circuit comprises: a lighting driving power supply, a first communication module, a second communication module and a single chip microcomputer; The first end of the first communication module is connected to the data transmission port of the single-chip microcomputer, the second end of the first communication module is used to access the reference voltage, and the third end of the first communication module is connected to the dimming port of the external network device; The first end of the second communication module is connected to the data receiving port of the single-chip microcomputer, the second end of the second communication module is used to access the reference voltage, and the third end of the second communication module is connected to the dimming port of the external network device; The output terminal of the single chip microcomputer is connected to the control terminal of the lighting driving power supply; The first communication module is used to receive the first digital pulse signal sent by the single-chip microcomputer, and send a first dimming signal to the external network device under the action of the first digital pulse signal, wherein the first dimming signal refers to an analog signal obtained after the first communication module performs digital-to-analog conversion on the first digital pulse signal; The second communication module is used to receive a second dimming signal sent by the external network device, and convert the second dimming signal into a second digital pulse signal, and send the second digital pulse signal to the single-chip microcomputer, and the single-chip microcomputer is used to adjust the light source driving voltage of the lighting driving power supply under the action of the second digital pulse signal, wherein the second dimming signal refers to a dimming instruction sent by the external network device to the single-chip microcomputer, the second dimming signal includes a dimming voltage, a pulse width modulation information wave and a resistance dimming signal, and the second digital pulse signal refers to a digital pulse signal obtained after the second communication module performs analog-to-digital conversion on the second dimming signal; The first communication module includes: a filter unit, a conduction control component and a first conduction component; The second communication module includes: a rectifying and filtering unit, a second conducting component, a third conducting component and a voltage dividing unit.

2. The lighting driving circuit according to claim 1, characterized in that: The first end of the filter unit and the input end of the conduction control component are both used to access the reference voltage, the second end of the filter unit is connected to the control end of the conduction control component, and the third end of the filter unit is connected to the data transmission port of the single-chip microcomputer; The output end of the conduction control component is connected to the control end of the first conduction component, the input end of the first conduction component is connected to the dimming port of the external network device, and the output end of the conduction control component and the output end of the first conduction component are both grounded; The conduction control component is used to be turned on or off under the action of the first digital pulse signal; when the first digital pulse signal connected to the control end of the conduction control component is at a low level, the conduction control component is turned on under the action of the first digital pulse signal, and the first conduction component is turned on under the action of the electrical signal output after the conduction control component is turned on, so that the first dimming signal received by the dimming port of the external network device is at a low level; when the first digital pulse signal connected to the control end of the conduction control component is at a high level, the conduction control component is turned off under the action of the first digital pulse signal, and the first conduction component is turned off under the action of the electrical signal output after the conduction control component is turned off, so that the first dimming signal received by the dimming port of the external network device is at a high level.

3. The lighting driving circuit according to claim 1, characterized in that: The first end of the rectifying and filtering unit is connected to the dimming port of the external network device, the second end of the rectifying and filtering unit is connected to the control end of the second conductive component, and the third end of the rectifying and filtering unit, the output end of the second conductive component and the output end of the third conductive component are all grounded; The first end of the voltage divider unit is used to access the reference voltage, the second end of the voltage divider unit is respectively connected to the input end of the second conductive component and the control end of the third conductive component, the third end of the voltage divider unit is connected to the data receiving port of the single-chip microcomputer, and the input end of the third conductive component is connected to the data receiving port of the single-chip microcomputer; The second conduction component is used to be turned on or off under the action of the second dimming signal, and the voltage divider unit is used to divide the reference voltage; when the second conduction component is turned on under the action of the second dimming signal, the third conduction component is turned on under the action of the reference voltage divided by the voltage divider unit, and the second digital pulse signal output by the third end of the voltage divider unit to the data receiving port of the microcontroller is a low-level signal; when the second conduction component is turned off under the action of the second dimming signal, the third conduction component is turned off under the action of the reference voltage divided by the voltage divider unit, and the second digital pulse signal output by the third end of the voltage divider unit to the data receiving port of the microcontroller is a high-level signal.

4. The lighting driving circuit according to claim 2, characterized in that: The filtering unit comprises: a first resistor and a second resistor; One end of the first resistor is used to access the reference voltage, the other end of the first resistor is respectively connected to one end of the second resistor and the control end of the conduction control component, and the other end of the second resistor is connected to the data sending port of the single chip microcomputer.

5. The lighting driving circuit according to claim 2, characterized in that: The conduction control component includes: a PNP transistor, a third resistor and a fourth resistor; The base of the PNP transistor is connected to the second end of the filtering unit, the emitter of the PNP transistor is used to access the reference voltage, the collector of the PNP transistor is connected to one end of the third resistor, the other end of the third resistor is respectively connected to the control end of the first conductive component and one end of the fourth resistor, and the other end of the fourth resistor is grounded.

6. The lighting driving circuit according to claim 2, characterized in that: The first conducting component includes: a first NPN transistor and a fifth resistor; One end of the fifth resistor is connected to the dimming port of the external network device, the other end of the fifth resistor is connected to the collector of the first NPN transistor, the base of the first NPN transistor is connected to the output end of the conduction control component, and the emitter of the first NPN transistor is grounded.

7. The lighting driving circuit according to claim 3, characterized in that: The rectifying and filtering unit comprises: a rectifying tube, a sixth resistor and a seventh resistor; The output end of the rectifier tube is connected to the dimming port of the external network device, the input end of the rectifier tube is connected to one end of the sixth resistor, the other end of the sixth resistor is respectively connected to one end of the seventh resistor and the control end of the second conductive component, and the other end of the seventh resistor is grounded.

8. The lighting driving circuit according to claim 3, characterized in that: The voltage dividing unit comprises: an eighth resistor and a ninth resistor; One end of the eighth resistor and one end of the ninth resistor are both used to access the reference voltage, the other end of the eighth resistor is respectively connected to the input end of the second conductive component and the control end of the third conductive component, and the other end of the ninth resistor is respectively connected to the data receiving port of the microcontroller and the input end of the third conductive component.

9. The lighting driving circuit according to claim 8, characterized in that: The second conducting component includes: a second NPN transistor, and the third conducting component includes: a third NPN transistor; The base of the second NPN transistor is connected to the second end of the rectifying and filtering unit, the collector of the second NPN transistor is connected to the other end of the eighth resistor, and the emitter of the second NPN transistor and the emitter of the third NPN transistor are both grounded; The base of the third NPN transistor is connected to the other end of the eighth resistor, and the collector of the third NPN transistor is connected to the data receiving port of the single chip microcomputer.

10. A lighting system, characterized in that: The lighting system comprises: the lighting driving circuit according to any one of claims 1 to 9, an external network device and at least one lighting device.

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