Lighting driving circuit and lighting system

Abstract

The invention provides an illumination driving circuit and an illumination system, and belongs to the technical field of electronic circuits. Wherein the first end of the first communication module is connected with a data sending port of the single-chip microcomputer, the first end of the second communication module is connected with a data receiving port of the single-chip microcomputer, and reference voltage is connected to the second end of the first communication module and the second end of the second communication module. The third end of the first communication module and the third end of the second communication module are connected with a dimming port of external network equipment, and the single-chip microcomputer is also connected with the control end of the illumination driving power supply; a first digital pulse signal sent by the single-chip microcomputer is converted into a first dimming signal readable by external network equipment through the first communication module, and a second dimming signal sent by the external network equipment is converted into a second digital pulse signal readable by the single-chip microcomputer through the second communication module. According to the invention, the communication barrier between the single-chip microcomputer and the external network equipment can be broken, and the accuracy and reliability of the dimming effect of the lighting system can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a lighting drive circuit and a lighting system. Background Art

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

[0003] In the related art, the external network device generally sends a dimming signal to the single-chip control circuit, and the single-chip control circuit controls the lighting effect of the corresponding LED lamp based on the received dimming signal. However, when controlling the lighting effect of the LED lamp based on the related art, the external network device directly communicates with the single-chip microcomputer, but not every type of dimming signal sent by the external network device can be recognized by the single-chip microcomputer, which causes the single-chip microcomputer to be unable to receive certain types of dimming signals, and further causes the single-chip microcomputer to be unable to accurately send dimming instructions to the corresponding lighting fixtures. Therefore, the solution of the related art has the problem of poor accuracy and reliability of the dimming effect of the light-emitting diode. Summary of the invention

[0004] The purpose of the present application is to provide a lighting driving circuit and a lighting system, which can break the communication barrier between the single-chip microcomputer and the external network device, thereby improving the accuracy and reliability of the dimming effect of the lighting system.

[0005] The embodiment of the present application is implemented as follows: According to a first aspect of an embodiment of the present application, there is provided a lighting driving circuit, the lighting driving circuit comprising: 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 a 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; The second communication module is used to receive a second dimming signal sent by an external network device, convert the second dimming signal into a second digital pulse signal, and send the second digital pulse signal to the microcontroller. The microcontroller is used to adjust the light source driving voltage of the lighting driving power supply under the action of the second digital pulse signal.

[0006] As a possible implementation, the first communication module includes: a filter unit, a conduction control component and a first conduction component; 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 a 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 an 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 an 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.

[0007] As a possible implementation, the second communication module includes: a rectifying and filtering unit, a second conducting component, a third conducting component and a voltage dividing unit; 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 after the voltage divider unit divides the reference voltage, and the second digital pulse signal output by the third end of the voltage divider unit to the data receiving port of the single-chip microcomputer 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 after the voltage divider unit divides the reference voltage, and the second digital pulse signal output by the third end of the voltage divider unit to the data receiving port of the single-chip microcomputer is a high-level signal.

[0008] As a possible implementation, the filtering unit includes: 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 computer.

[0009] As a possible implementation, 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.

[0010] As a possible implementation, the first conduction 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.

[0011] As a possible implementation, the rectifying and filtering unit includes: 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.

[0012] As a possible implementation, the voltage dividing unit includes: 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.

[0013] As a possible implementation, 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 computer.

[0014] A second aspect of an embodiment of the present application provides a lighting system, which includes: the lighting driving circuit described in the first aspect, an external network device, and at least one lighting device.

[0015] The beneficial effects of the embodiments of the present application include: The embodiment of the present application provides a lighting driving circuit, which is composed of a lighting driving 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 transmission 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 the external network device, and the output end of the second communication module is connected to the data receiving port of the single-chip microcomputer. The first communication module and the second communication module are both connected to a preset reference voltage. Among them, the first communication module is used to receive a first digital pulse signal sent by the single-chip microcomputer to the external network device, and 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 a second dimming signal sent by the external network device to the single-chip microcomputer, and 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 driving power supply according to the received second digital pulse signal, so that the lighting driving power supply outputs a light source driving voltage adapted to the dimming control instruction to achieve a dimming effect of the lighting fixture. This allows the MCU 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, it can break the communication barrier between the MCU and the external network device, thereby improving the accuracy and reliability of the dimming effect of the lighting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a first lighting driving circuit provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a single chip microcomputer provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a second lighting driving circuit provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a third lighting driving circuit provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a fourth lighting driving circuit provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a fifth lighting driving circuit provided in an embodiment of the present application; Figure 7 A schematic diagram of the structure of a lighting system provided in an embodiment of the present application.

[0018] Description of the drawings: 10: lighting drive circuit; 101: lighting drive power supply; 102: first communication module; 1021: filtering unit; 211: first resistor; 212: second resistor; 1022: conduction control component; 221: PNP transistor; 222: third resistor; 223: fourth resistor; 1023: first conduction component; 231: first NPN transistor; 232: fifth resistor; 103: second communication module ; 1031: rectifier filter unit; 311: rectifier tube; 312: sixth resistor; 313: seventh resistor; 1032: second conduction component; 321: second NPN transistor; 1033: third conduction component; 331: third NPN transistor; 1034: voltage divider unit; 341: eighth resistor; 342: ninth resistor; 104: single chip microcomputer; 20: lighting system; 201: external network equipment; 202: lighting device. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] 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 present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. It should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] At present, the external network device generally sends a dimming signal directly to the single-chip microcomputer control circuit, and the single-chip microcomputer control circuit controls the driving voltage of the lighting driving power supply based on the received dimming control signal, thereby achieving the corresponding lighting effect. However, in this solution, there are many types of dimming signals sent by the external network device, and not every type of dimming signal can be directly read by the single-chip microcomputer, which causes the single-chip microcomputer control circuit to be unable to receive certain types of dimming signals, and then causes the single-chip microcomputer to be unable to accurately control the dimming voltage of the lighting driving power supply, which results in poor reliability and accuracy of the dimming effect of the lighting system.

[0024] To this end, the embodiment of the present application provides a lighting drive circuit, wherein the input end of the first communication module is connected to the data transmission 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 drive power supply. The first digital pulse signal sent by the single-chip microcomputer is received through the first communication module, and the first digital pulse signal is converted into a first dimming signal and sent to the dimming port of the external network device; the second dimming signal sent by the external network device is received through the second communication module, and the second dimming signal is converted into a second digital pulse signal and sent to the single-chip microcomputer. Under the action of the second digital pulse signal, the single-chip microcomputer adjusts the light source driving voltage of the lighting drive power supply to achieve the dimming effect of the lighting system. In this way, it is possible to break the communication barrier between the single-chip microcomputer and the external network device, thereby improving the accuracy and reliability of the dimming effect of the lighting system.

[0025] The lighting driving circuit and the lighting system provided in the embodiments of the present application are explained in detail below with reference to the accompanying drawings.

[0026] Figure 1 A schematic diagram of a lighting drive circuit provided in this application is shown in FIG. Figure 1 An embodiment of the present application provides a lighting driving circuit 10 , which includes: a lighting driving power supply 101 , a first communication module 102 , a second communication module 103 and a single-chip microcomputer 104 .

[0027] The first end of the first communication module 102 is connected to the data transmission port of the single-chip microcomputer 104 , the second end of the first communication module 102 is used to access the reference voltage, and the third end of the first communication module 102 is connected to the dimming port of the external network device 201 .

[0028] Optionally, the first end of the first communication module 102 is used as the input end of the first communication module 102, the second end of the first communication module 102 is used as the reference voltage input end of the first communication module 102, the third end of the first communication module 102 is used as the output end of the first communication module 102, the data transmission port is used as the digital pulse signal transmission port of the single-chip microcomputer 104, and the dimming port of the external network device 201 refers to the port for sending and receiving dimming signals by the external network device 201. Among them, the external network device 201 refers to a device that sends a dimming signal to the lighting drive circuit 10, and the external network device 201 can be implemented by peripheral devices such as a dimming parameter box, and this application does not make specific limitations on this.

[0029] Optionally, the reference voltage is a voltage preset by the user. The reference voltage is mainly used to power 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 this application does not make specific limitations on this.

[0030] Optionally, the first communication module 102 converts the digital pulse signal sent by the microcontroller 104 into an analog signal readable by the external network device 201 based on the digital pulse signal connected to the first end and the reference voltage received at the second end, and sends the converted dimming signal to the dimming port of the external network device 201.

[0031] 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 the reference voltage, and the third end of the second communication module 103 is connected to the dimming port of the external network device 201 .

[0032] 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 of the microcontroller 104 for receiving digital pulse signals.

[0033] Optionally, the second communication module 103 converts the dimming signal sent by the external network device 201 to the microcontroller 104 into a digital pulse signal readable by the microcontroller 104 based on the dimming signal received at the third end and the reference voltage received at the second end, and sends the converted digital pulse signal to the data receiving port of the microcontroller 104.

[0034] It is worth noting that the reference voltage received by the second end of the first communication module 102 and the reference voltage received by the second end of the second communication module 103 may have the same voltage value or different voltage values, which is specifically determined according to the application scenarios of the first communication module 102 and the second communication module 103, and this application does not make any specific limitations on this.

[0035] The output end of the single chip microcomputer 104 is connected to the control end of the lighting driving power supply 101 .

[0036] Optionally, the single chip computer 104 sends a corresponding control signal to the lighting driving power supply 101 based on the received dimming signal, so that the lighting driving power supply 101 outputs a driving voltage adapted to the dimming effect indicated by the dimming signal, and the lighting fixture emits light under the action of the driving voltage output by the lighting driving power supply 101.

[0037] The single-chip microcomputer 104 integrates a single-chip microcomputer control circuit, and the single-chip microcomputer 104 sends and receives instructions based on the single-chip microcomputer control circuit to realize the lighting drive control function.

[0038] The first communication module 102 is used to receive the first digital pulse signal sent by the single chip computer 104 , and send a first dimming signal to the external network device 201 under the action of the first digital pulse signal.

[0039] Optionally, the first digital pulse signal refers to a digital pulse signal sent by the single-chip microcomputer 104 to the external network device 201, and the first dimming signal refers to an analog signal obtained after the first communication module 102 performs digital-to-analog conversion on the first digital pulse signal. 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.

[0040] It is worth noting that the digital pulse signal can be in the form of high or low levels, or in the form of a pulse width modulation signal PWM wave, and this application does not make any specific limitations on this.

[0041] The second communication module 103 is used to receive the second dimming signal sent by the external network device 201, convert the second dimming signal into a second digital pulse signal, and send the second digital pulse signal to the microcontroller 104. The microcontroller 104 is used to adjust the light source driving voltage of the lighting driving power supply 101 under the action of the second digital pulse signal.

[0042] Optionally, the second dimming signal refers to a dimming instruction sent by the external network device 201 to the single-chip microcomputer 104. The second dimming signal can be in the form of any one of a dimming voltage of 0V~10V, a pulse width modulation signal PWM wave, and a resistance dimming signal. This application does not make any specific limitations on this.

[0043] Optionally, the second digital pulse signal refers to a digital pulse signal obtained after the second communication module 103 performs analog-to-digital conversion on the second dimming signal. After the second communication module 103 receives 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 microcontroller 104. The microcontroller 104 controls the lighting driving power supply 101 based on the received second digital pulse signal to adjust the light source driving voltage of the lighting driving power supply 101.

[0044] Optionally, the light source driving voltage refers to the driving voltage provided by the lighting driving power supply 101 for the lighting device. The lighting driving power supply 101 can be provided by a power grid system, and this application does not make any specific limitation on this.

[0045] Among them, the first dimming signal is sent from 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 from 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.

[0046] In the embodiment of the present application, the lighting driving circuit is composed of a lighting driving 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 transmission 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 the external network device, the output end of the second communication module is connected to the data receiving port of the single-chip microcomputer, and the first communication module and the second communication module are both 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, and 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, and convert the second dimming signal into a corresponding second digital pulse signal, and send it to the single-chip microcomputer, and the single-chip microcomputer sends a corresponding dimming control instruction to the lighting driving power supply according to the received second digital pulse signal, so that the lighting driving power supply outputs a light source driving voltage adapted to the dimming control instruction to achieve the dimming effect of the lighting fixture. This allows the MCU 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, it can break the communication barrier between the MCU and the external network device, thereby improving the accuracy and reliability of the dimming effect of the lighting system.

[0047] In an optional embodiment, see Figure 2 The single-chip microcomputer 104 in the lighting driving circuit 10 provided in the embodiment of the present application includes: a data transmission 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 transmission port, and receives a dimming signal sent by the external network device via the data receiving port.

[0048] In an optional embodiment, see Figure 3 The first communication module 102 in the lighting driving circuit 10 provided in the embodiment of the present application includes: a filtering unit 1021 , a conduction control component 1022 and a first conduction component 1023 .

[0049] The first end of the filter unit 1021 and the input end of the conduction control component 1022 are both used to access the reference voltage, the second end of the filter unit 1021 is connected to the control end of the conduction control component 1022, and the third end of the filter unit 1021 is connected to the data sending port of the microcontroller 104.

[0050] 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 digital-to-analog conversion.

[0051] 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, and the output end of the conduction control component 1022 and the output end of the first conduction component 1023 are both grounded.

[0052] The conduction control component 1022 is used to turn 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 1022 is at a low level, the conduction control component 1022 is turned on under the action of the first digital pulse signal, and the first conduction component 1023 is turned on under the action of the electrical signal output after the conduction control component 1022 is turned on, 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 is turned off under the action of the first digital pulse signal, and the first conduction component 1023 is turned off under the action of the electrical signal output after the conduction control component 1022 is turned off, so that the first dimming signal received by the dimming port of the external network device 201 is at a high level.

[0053] It is worth noting 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 microcontroller 104 is a low level, which may be 0 level, and the first digital pulse signal output by the microcontroller 104 is a high level, which may be 1. This application does not make any specific limitations on this.

[0054] In an optional embodiment, see Figure 4 The second communication module 103 in the lighting driving circuit 10 provided in the embodiment of the present application includes: a rectifying and filtering unit 1031 , a second conducting component 1032 , a third conducting component 1033 and a voltage dividing unit 1034 .

[0055] The first end of the rectifying and filtering unit 1031 is connected to the dimming port of the external network device 201, the second end of the rectifying and filtering unit 1031 is connected to the control end of the second conductive component 1032, and the third end of the rectifying and filtering unit 1031, the output end of the second conductive component 1032 and the output end of the third conductive component 1033 are all grounded.

[0056] The first end of the voltage divider unit 1034 is used to access the reference voltage, the second end of the voltage divider unit 1034 is respectively connected to the input end of the second conductive component 1032 and the control end of the third conductive component 1033, the third end of the voltage divider unit 1034 is connected to the data receiving port of the microcontroller 104, and the input end of the third conductive component 1033 is connected to the data receiving port of the microcontroller 104.

[0057] The second conduction component 1032 is used to be turned on or off under the action of the second dimming signal, and the voltage divider unit 1034 is used to divide the reference voltage; when the second conduction component 1032 is turned on under the action of the second dimming signal, the third conduction component 1033 is turned on under the action of the reference voltage after the voltage divider unit 1034 divides the reference voltage, and the second digital pulse signal output by the third end of the voltage divider unit 1034 to the data receiving port of the single-chip microcomputer 104 is a low-level signal; when the second conduction component 1032 is turned off under the action of the second dimming signal, the third conduction component 1033 is turned off under the action of the reference voltage after the voltage divider unit 1034 divides the reference voltage, and the second digital pulse signal output by the third end of the voltage divider unit 1034 to the data receiving port of the single-chip microcomputer 104 is a high-level signal.

[0058] It is worth noting 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 microcontroller 104 is a low level, which may be 0 level, and the second digital pulse signal received by the microcontroller 104 is a high level, which may be 1. This application does not make any specific limitations on this.

[0059] In an optional embodiment, see Figure 5 The filtering unit 1021 in the first communication module 102 of the lighting driving circuit 10 provided in the embodiment of the present application includes: a first resistor 211 and a second resistor 212 .

[0060] One end of the first resistor 211 is used to access the reference voltage, and 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 computer 104 .

[0061] In an optional embodiment, see Figure 5 The conduction control component 1022 in the first communication module 102 of the lighting driving circuit 10 provided in the embodiment of the present application includes: a PNP transistor 221 , a third resistor 222 and a fourth resistor 223 .

[0062] The base of the PNP transistor 221 is connected to the second end of the filtering unit 1021, the emitter of the PNP transistor 221 is used to access the reference voltage, the collector of the PNP transistor 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 conductive component 1023 and one end of the fourth resistor 223, and the other end of the fourth resistor 223 is grounded.

[0063] Optionally, the third resistor 222 and the fourth resistor 223 are used to divide the electrical signal emitted by the collector of the PNP transistor 221 so that the electrical signal applied to the first NPN transistor 231 can control the first NPN transistor 231 and the PNP transistor 221 to be turned on or off at the same time.

[0064] In an optional embodiment, see Figure 5 The first conducting component 1023 in the first communication module 102 of the lighting driving circuit 10 provided in the embodiment of the present application includes: a first NPN transistor 231 and a fifth resistor 232 .

[0065] 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 transistor 231, the base of the first NPN transistor 231 is connected to the output end of the conduction control component 1022, and the emitter of the first NPN transistor 231 is grounded.

[0066] Optionally, the fifth resistor 232 serves as a pull-down resistor. When the first NPN transistor 231 is turned on, the fifth resistor 232 pulls down the first dimming signal of the dimming port of the external network device 201 to a low level.

[0067] Optionally, the first resistor 211, the second resistor 212, the PNP transistor 221, the third resistor 222, the fourth resistor 223, the first NPN transistor 231 and the fifth resistor 232 together constitute a first communication module 102. The first communication module 102 serves as a data sending port in the lighting driving circuit 10, and is used to convert the first digital pulse signal sent by the data sending port of the microcontroller 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 after filtering by the first resistor 211 and the second resistor 212 controls the PNP transistor 221 to be turned on. At the same time, the electrical signal output by the first NPN transistor 231 controls the second NPN transistor 321 to be turned on after voltage division by the third resistor 222 and the fourth resistor 223, 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 after filtering by the first resistor 211 and the second resistor 212 controls the PNP transistor 221 to be turned off. At the same time, the electrical signal output by the first NPN transistor 231 controls the second NPN transistor 321 to be turned off after voltage division by the third resistor 222 and the fourth resistor 223, and the first dimming signal sent to the external network device 201 through the fifth resistor is a high level signal.

[0068] In an optional embodiment, see Figure 6 The rectifying and filtering unit 1031 in the second communication module 103 of the lighting driving circuit 10 provided in the embodiment of the present application includes: a rectifier tube 311 , a sixth resistor 312 and a seventh resistor 313 .

[0069] The output end of the rectifier tube 311 is connected to the dimming port of the external network device 201, the input end of the rectifier tube 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 conductive component 1032, and the other end of the seventh resistor 313 is grounded.

[0070] Optionally, the rectifier tube 311 is used to rectify the second dimming signal of the second communication module 103 input by the external network device 201, and filter and divide 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 divided second dimming signal.

[0071] In an optional embodiment, see Figure 6 The voltage divider unit 1034 in the second communication module 103 of the lighting driving circuit 10 provided in the embodiment of the present application includes: an eighth resistor 341 and a ninth resistor 342 .

[0072] 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 conductive component 1032 and the control end of the third conductive component 1033, and the other end of the ninth resistor 342 is respectively connected to the data receiving port of the single-chip computer 104 and the input end of the third conductive component 1033.

[0073] Optionally, the eighth resistor 341 and the ninth resistor 342 are used to divide the reference voltage provided by the external power supply, and control the on and off of the third conductive component 1033 based on the divided reference voltage, and output a corresponding second digital pulse signal.

[0074] In an optional embodiment, see Figure 6 The second conducting component 1032 in the second communication module 103 of the lighting driving circuit 10 provided in the embodiment of the present application includes: a second NPN transistor 321 , and the third conducting component 1033 includes: a third NPN transistor 331 .

[0075] 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 emitter of the second NPN transistor 321 and the emitter of the third NPN transistor 331 are both grounded.

[0076] 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 computer 104 .

[0077] Optionally, the rectifier 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 constitute a second communication module 103, and the second communication module 103 serves as a data receiving port in the lighting driving circuit 10, for receiving a 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 tube 311 is broken down, the second NPN transistor 321 is turned on, and at the same time, part of the charge of the reference voltage provided by the external power supply is discharged to the ground after voltage division, the third NPN transistor 331 is turned on, 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 tube 311 cannot be broken down, the second NPN transistor 321 is turned off, and 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 does not change, 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.

[0078] In an optional embodiment, see Figure 7 An embodiment of the present application provides a lighting system 20 , which includes: a lighting driving circuit 10 , an external network device 201 , and at least one lighting device 202 .

[0079] The lighting driving circuit 10 is connected to the external network device 201 and each lighting device 202 respectively, and the lighting driving 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.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0081] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 a 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; 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, 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.

2. The lighting driving circuit according to claim 1, characterized in that: The first communication module includes: a filter unit, a conduction control component and a first conduction component; 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 second communication module includes: a rectifying and filtering unit, a second conducting component, a third conducting component and a voltage dividing unit; 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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