CN110708791B

CN110708791B - Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp

Info

Publication number: CN110708791B
Application number: CN201910987244.6A
Authority: CN
Inventors: 李胜森; 罗杨洋; 杨林; 杨海涛
Original assignee: Longhorn Intelligent Tech Co ltd
Current assignee: Longhorn Intelligent Tech Co ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2024-02-09
Anticipated expiration: 2039-10-17
Also published as: CN110708791A

Abstract

A lamp tube driving circuit compatible with an electronic rectifier and a mains supply and a lamp are provided, wherein the lamp tube driving circuit comprises: the device comprises an electric energy input module, a frequency selection absorption module, a rectification filter module, an anti-interference module and a voltage reduction module; the electric energy input module can be compatible to be connected with an electronic rectifier or a mains supply, and the compatibility and reliability of a circuit structure are higher; when the lamp tube driving circuit is connected to the electronic rectifier, the lamp tube driving circuit rectifies and filters the first alternating current signal output by the electronic rectifier, and then the power supply function of the electronic rectifier is realized for the light-emitting module; when the lamp tube driving circuit is connected with the mains supply, the lamp tube driving circuit rectifies, filters and reduces the voltage of the second alternating current signal output by the mains supply, and then the lamp tube driving circuit realizes the mains supply function for the light emitting module; therefore, the embodiment of the application can realize the electronic rectifier power supply mode and the mains supply mode in a compatible manner, has extremely high compatibility and flexibility, and reduces the driving cost and the application cost of the lamp tube.

Description

Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp

Technical Field

The application belongs to the technical field of electronic circuits, and particularly relates to a lamp tube driving circuit compatible with an electronic rectifier and a mains supply and a lamp.

Background

Along with the continuous improvement of the living standard of people, people successively develop various types of light source equipment, wherein the light source equipment has different light source driving modes, and each light source equipment also emits light sources with different colors and brightnesses so as to meet the visual demands of the light sources in various aspects of people and bring good visual experience to people; each type of light source equipment has a specific application environment, and when the light source equipment realizes different illumination effects in the specific application environment, good use experience is brought to a user; and because the manufacturing cost of the light source equipment is low, the self luminous state can be changed according to the actual operation requirement of a user, and the controllability is high, the light source equipment has realized various purposes such as illumination, decoration, advertisement and the like, and becomes an electronic component which is not necessary in modern production and life.

As the types of the light source devices are diversified, each type of light source device must adopt a corresponding type of driving circuit to meet the driving control requirement of the light source device; however, the light source device in the conventional technology can only be matched with a specific type of driving circuit for use, the driving mode of the light source device has higher singleness, and the compatible use of light source driving cannot be realized, so that the driving cost of the light source device is higher, the control steps are more complicated, great inconvenience is brought to the use of a user, the circuit structure of the driving circuit of the light source device is more complex, the manufacturing cost of the driving circuit is higher, the light source driving efficiency and reliability of the light source device are lower, and the light source driving precision and practical value of the light source device are reduced.

Disclosure of Invention

In view of this, the embodiment of the application provides a lamp tube driving circuit and a lamp compatible with an electronic rectifier and a mains supply, and aims to solve the problems that a light source driving circuit in a traditional technical scheme cannot meet the light source driving requirements of different types of light source equipment, has lower compatibility and reliability, and causes higher light source driving cost, more complex circuit structure and lower practical value.

A first aspect of embodiments of the present application provides a lamp driving circuit compatible with an electronic rectifier and a mains supply, including: the device comprises an electric energy input module, a frequency selection absorption module, a rectification filter module, an anti-interference module and a voltage reduction module;

the electric energy input module is connected with the frequency selection absorption module, the frequency selection absorption module is connected with the rectification filtering module, the anti-interference module is connected with the rectification filtering module and the light-emitting module, and the voltage reduction module is connected with the rectification filtering module and the light-emitting module;

the electric energy input module is used for being connected with an electronic rectifier or commercial power; when the electronic rectifier is connected, transmitting a first alternating current signal output by the electronic rectifier, or when the commercial power is connected, transmitting a second alternating current signal output by the commercial power;

The frequency-selecting absorption module is used for frequency-selecting absorption of the first alternating current electric signal to obtain a third alternating current electric signal when the first alternating current electric signal is received, or transmitting the second alternating current electric signal when the second alternating current electric signal is received;

the rectifying and filtering module is used for rectifying and filtering the third alternating current signal to obtain a first direct current signal, or rectifying and filtering the second alternating current signal to obtain a second direct current signal;

the anti-interference module is used for carrying out anti-interference processing on the first direct current signal to obtain a third direct current signal so as to supply power to the light-emitting module;

the voltage reduction module is used for carrying out voltage reduction processing on the second direct current electric signal to obtain a fourth direct current electric signal so as to supply power to the light-emitting module.

In one embodiment thereof, the method further comprises: the voltage stabilizing module is connected with the anti-interference module, the voltage reducing module and the light emitting module;

the voltage stabilizing module is used for carrying out voltage stabilizing treatment on the third direct current electric signal or the fourth direct current electric signal, and outputting the third direct current electric signal after voltage stabilizing treatment or the fourth direct current electric signal after voltage stabilizing treatment to the light emitting module.

In one embodiment thereof, the method further comprises: a harmonic suppression module and an electromagnetic interference suppression module; the harmonic suppression module is connected with the voltage stabilizing module, and the electromagnetic interference suppression module is connected with the voltage stabilizing module;

the electromagnetic interference suppression module is used for performing electromagnetic interference suppression on the third direct current electric signal or the fourth direct current electric signal;

the harmonic suppression module is used for performing harmonic suppression on the third direct current electric signal or the fourth direct current electric signal.

In one embodiment, the on-off control module; the on-off control module is connected with the electric energy input module, the voltage reduction module and the anti-interference module;

the on-off control module is used for accessing the first alternating current signal or the second alternating current signal, rectifying and dividing the first alternating current signal to obtain a first switch signal, and rectifying and dividing the second alternating current signal to obtain a second switch signal;

the voltage reduction module is used for entering a stop state according to the first switch signal, and carrying out voltage reduction processing on the second direct current signal according to the second switch signal to obtain the fourth direct current signal so as to supply power to the light emitting module;

The anti-interference module is used for receiving the rectified first alternating current signal and carrying out anti-interference processing on the first direct current signal according to the rectified first alternating current signal.

In one embodiment thereof, the buck module includes: the switching unit is connected with the on-off control module, the voltage stabilizing control unit is connected with the rectifying and filtering module, and the voltage reducing unit is connected with the switching unit, the voltage stabilizing control unit and the light emitting module;

the switch unit is used for conducting according to the first switch signal, turning off according to the second switch signal and generating a first control signal;

the voltage stabilizing control unit is used for accessing the second direct current signal and carrying out voltage stabilizing treatment on the second direct current signal to obtain a first power supply signal;

the voltage reducing unit is used for reducing the voltage of the first power supply signal according to the first control signal to obtain the fourth direct current signal.

In one embodiment thereof, the power input module includes: a first power input unit and a second power input unit; the first electric energy input unit is connected with the frequency selection absorption module, and the second electric energy input unit is connected with the frequency selection absorption module;

The first electric energy input unit is used for being connected with the electronic rectifier or the commercial power; when the electronic rectifier is connected, transmitting a first alternating current signal output by the electronic rectifier, and when the commercial power is connected, transmitting a second alternating current signal output by the commercial power;

the second electric energy input unit is used for being connected with the electronic rectifier or the commercial power; when the electronic rectifier is connected, a first alternating current signal output by the electronic rectifier is transmitted, and when the commercial power is connected, a second alternating current signal output by the commercial power is transmitted.

In one embodiment thereof, the method further comprises: the first overcurrent protection module is connected with the first electric energy input unit, and the second overcurrent protection module is connected with the second electric energy input unit;

the first overcurrent protection module is used for performing overcurrent protection on the first alternating current electric signal or the second alternating current electric signal when the first electric energy input unit receives the first alternating current electric signal or the second alternating current electric signal;

the second overcurrent protection module is used for carrying out overcurrent protection on the first alternating current electric signal or the second alternating current electric signal when the second electric energy input unit receives the first alternating current electric signal or the second alternating current electric signal.

In one embodiment thereof, the method further comprises: a clamping module; the clamping module is connected between the electric energy input module and the frequency-selecting absorption module;

the clamping module is used for clamping the voltage of the first alternating current signal or the second alternating current signal.

In one embodiment thereof, the method further comprises: an interference suppression module; the interference suppression module is connected between the electric energy input module and the frequency selection absorption module;

the interference suppression module is used for conducting interference suppression on the first alternating current signal or the second alternating current signal.

A second aspect of embodiments of the present application provides a luminaire, comprising:

a light emitting module; and

a lamp driving circuit as described above; the light-emitting module is connected with the lamp tube driving circuit, and the lamp tube driving circuit is used for supplying power to the light-emitting module.

The lamp tube driving circuit compatible with the electronic rectifier and the mains supply can be compatible with a power supply mode of the electronic rectifier and a power supply mode of the mains supply, so that a compatible power supply function of the light-emitting module is realized, and the power supply efficiency and the power supply precision of the light-emitting module are greatly ensured; the electric energy input module can be compatible with the connection mode of an electronic rectifier or a commercial power, so that the physical compatibility and the electric energy transmission stability of the lamp tube driving circuit are greatly ensured; after the electric energy output by the electronic rectifier or the electric energy output by the commercial power is respectively processed and converted through the circuit module in the lamp tube driving circuit, the light-emitting module can be connected with rated direct-current electric energy, so that the power-on efficiency and the power-on safety of the light-emitting module are greatly improved; therefore, the embodiment independently performs the electronic rectifier power supply mode and the mains supply mode on the light-emitting module, the two modes are not mutually interfered, the transmission efficiency of electric energy in the lamp tube driving circuit is ensured, and the application range is wider; the lamp tube driving circuit can be suitable for various different industrial technical fields, and can safely drive the light source of the light-emitting module on the basis of not changing the internal circuit structure of the lamp tube driving circuit, so that the light source driving cost and the control complexity of the light-emitting module are greatly reduced, the internal circuit structure of the lamp tube driving circuit is facilitated to be simplified, the circuit installation and design cost are saved, and great convenience is brought to the use of users.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lamp driving circuit compatible with an electronic rectifier and a mains supply according to an embodiment of the present application;

FIG. 2 is a schematic diagram of another structure of a lamp driving circuit compatible with an electronic rectifier and a commercial power according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another structure of a lamp driving circuit compatible with an electronic rectifier and a commercial power according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another structure of a lamp driving circuit compatible with an electronic rectifier and a commercial power according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a buck module according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an electrical energy input module according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another structure of a lamp driving circuit compatible with an electronic rectifier and a commercial power according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of another structure of a lamp driving circuit compatible with an electronic rectifier and a commercial power according to an embodiment of the present disclosure;

fig. 9 is a schematic circuit structure of a first power input unit, a second power input unit, a first overcurrent protection module, and a second overcurrent protection module according to an embodiment of the present application;

FIG. 10 is a schematic circuit diagram of a voltage stabilizing module according to an embodiment of the present disclosure;

FIG. 11 is a schematic circuit diagram of a switching unit, a voltage stabilizing control unit and a voltage reducing unit according to an embodiment of the present application;

FIG. 12 is a schematic circuit diagram of an anti-interference module according to an embodiment of the present disclosure;

FIG. 13 is a schematic circuit diagram of an on-off control module according to an embodiment of the present disclosure;

fig. 14 is a schematic circuit structure of a frequency selective absorption module according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a lamp according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

It should be noted that, according to the principle of lamp driving, the lamp driving modes are divided into: an electronic rectifier (Electronic Rectifier, ECG) power mode and a mains (Alternating Current, AC) power mode, in which the power is converted by integrated electronic components and high frequency AC power is output, exemplary of which is (30-100V) 20KH-140KH AC power; the high-frequency alternating current electric energy has higher electric energy compatibility and stability, and the ECG power supply mode needs more complicated electronic components; in the AC power supply mode, only small electronic components are needed to realize the function of converting electric energy so as to achieve the effect of electrifying the lamp tube, wherein in the AC power supply mode, low-frequency alternating-current electric energy is converted to achieve the effect of electrifying the lamp tube, and the low-frequency alternating-current electric energy (220-240V) is exemplified as 50-60HZ alternating-current electric energy; therefore, because of the great difference of electric energy between the ECG power supply mode and the AC power supply mode, the driving circuit in the prior art can only be suitable for one of the ECG power supply mode and the AC power supply mode, which results in higher cost of driving the lamp tube, and higher circuit complexity and lower compatibility of the lamp tube driving circuit; based on this, the lamp tube driving circuit provided by the embodiment of the application can realize the AC power supply mode and the ECG power supply mode in a compatible manner, and brings great convenience to users.

Referring to fig. 1, a schematic structural diagram of a lamp driving circuit 10 compatible with an electronic rectifier and a mains supply is provided, the lamp driving circuit 10 is connected with a light emitting module 20, the lamp driving circuit 10 can realize an ECG power supply mode and an AC power supply mode for the light emitting module 20, and a circuit structure is simplified; for convenience of explanation, only the portions related to the present embodiment are shown, and the detailed description is as follows:

the lamp driving circuit 10 includes: the device comprises an electric energy input module 101, a frequency selection absorption module 102, a rectification filter module 103, an anti-interference module 104 and a voltage reduction module 105.

The power input module 101 is connected with the frequency selection absorption module 102, the frequency selection absorption module 102 is connected with the rectification filter module 103, the anti-interference module 104 is connected with the rectification filter module 103 and the light-emitting module 20, and the voltage reduction module 105 is connected with the rectification filter module 103 and the light-emitting module 20; and higher communication compatibility can be realized among the internal circuit modules of the lamp tube driving circuit 10 so as to realize good light source driving function of the light emitting module 20, and the light source driving efficiency and the control precision of the lamp tube driving circuit 10 to the light emitting module 20 are ensured.

The electric energy input module 101 is used for connecting the electronic rectifier 30 or the commercial power 40; and when the electronic rectifier 30 is connected, the first alternating current signal output by the electronic rectifier 30 is transmitted, or when the commercial power 40 is connected, the second alternating current signal output by the commercial power 40 is transmitted.

The electronic rectifier 30 and the utility power 40 both have an electric energy output function, so as to provide better electric energy for the light-emitting module 20, and ensure the power supply continuity and safety of the light-emitting module 20; the first alternating current electric signal and the second alternating current electric signal have different frequencies, wherein the first alternating current electric signal is a high-frequency alternating current electric signal of 20 KHZ-140 KHZ, and the second alternating current electric signal is a low-frequency alternating current electric signal of 50 HZ-60 HZ; therefore, the combination of the first ac electrical signal and the second ac electrical signal can realize the power supply requirement of the diversified lamp tubes, and satisfy the rated power-on requirement of the light-emitting module 20.

The electric energy input module 101 in the embodiment has high physical connection compatibility, and the electric energy input module 101 and any one of the electronic rectifier 30 and the commercial power 40 realize electric energy transmission; when the electronic rectifier 30 is connected to the electric energy input module 101, an ECG power supply mode is realized according to the first alternating current signal output by the electronic rectifier 30; when the commercial power 40 is connected to the electric energy input module 101, an AC power supply mode is realized according to the second alternating current signal output by the commercial power 40; therefore, the lamp driving circuit 10 in the present embodiment can be switched between two power supply modes to match the power supply requirement of the light emitting module 20; the electric energy input module 101 has higher electric energy transmission precision and electric energy transmission efficiency, ensures the power supply safety and reliability of the lamp driving circuit 10, and the lamp driving circuit 10 can realize higher conversion precision and control flexibility for alternating current electric energy.

The frequency selective absorption module 102 is configured to perform frequency selective absorption on the first ac electrical signal to obtain a third ac electrical signal when the first ac electrical signal is received, or transmit the second ac electrical signal when the second ac electrical signal is received.

The frequency selection absorption module 102 can present low impedance characteristics to signals in a preset frequency band and present high impedance characteristics to signals not in the preset frequency band, and the frequency selection absorption module 102 can limit the output current in the ECG power supply mode so as to ensure the power supply safety and reliability of the lamp driving circuit 10 to the light emitting module 20 in the ECG power supply mode and prevent the light emitting module 20 from being damaged and disturbed by overcurrent energy in the ECG power supply mode; therefore, when the electric energy input module 101 outputs the first alternating current electric signal to the frequency-selecting absorption module 102, the frequency-selecting absorption module 102 only realizes the frequency-selecting processing function for the first alternating current electric signal, so that the electric energy safety and reliability of the electronic components in the ECG power supply mode are ensured; when the electric energy input module 101 outputs the second AC electric signal to the frequency-selecting absorption module 102, the frequency-selecting absorption module 102 does not realize a frequency-selecting processing function for the second AC electric signal, the AC electric energy output by the utility power 40 can keep a compatible and fast transmission function in the lamp driving circuit 10, which ensures the electric energy power transmission precision of the second AC electric signal, and the lamp driving circuit 10 can realize a higher power supply for electronic components in the AC power supply mode.

The rectifying and filtering module 103 is configured to rectify and filter the third ac electrical signal to obtain a first dc electrical signal; or the rectifying and filtering module 103 is configured to rectify and filter the second ac electrical signal to obtain a second dc electrical signal.

In the AC power supply mode, the rectifying and filtering module 103 has an electric energy rectifying function, and the second dc electrical signal has a specific voltage amplitude and a specific current amplitude by rectifying and filtering the AC electric energy in real time, so that the dc electric energy output by the rectifying and filtering module 103 can meet the power supply precision requirement of the light emitting module 20, and the compatibility and the power supply stability of the lamp tube driving circuit 10 are improved.

The rectification and filtering module 103 has a rectification and filtering function, and can output stable direct current electric energy after rectifying and filtering the alternating current electric energy through the rectification and filtering module 103 so as to ensure high efficiency and high reliability of the driving process of the lamp tube; the first direct current signal output by the rectifying and filtering module 103 has a specific voltage amplitude and a specific current amplitude, so that stable direct current electric energy can be provided for the light-emitting module 20 through the first direct current signal, and the power supply conversion accuracy of the light-emitting module 20 is accelerated; therefore, the rectifying and filtering module 103 in this embodiment can realize rectifying and filtering functions for various types of AC power, the lamp driving circuit 10 can be suitable for various different working environments, and the lamp driving circuit 10 can realize compatible power-on functions of the light emitting module 20 in the ECG power supply mode or the AC power supply mode, thereby ensuring safety and compatibility of lamp driving.

The anti-interference module 104 is configured to perform anti-interference processing on the first dc signal to obtain a third dc signal, so as to supply power to the light emitting module 20.

In the ECG power supply mode, the first dc signal is interfered by noise during the on or off process of the electronic component, and even is interfered by false triggering of the voltage clutter, so as to affect the power supply stability and safety of the light emitting module 20; therefore, the anti-interference module 104 can filter various noise amounts of the direct current power in the transmission process, so as to improve the power accuracy and efficiency of the third direct current signal, and ensure the ECG power supply safety and anti-interference performance of the light emitting module 20; therefore, the lamp driving circuit 10 can be universally applied to various communication environments, and can accurately and real-time convert the electric energy output by the electronic rectifier 30, so as to ensure the power-on reliability and stability of the light emitting module 20, and have higher practical value.

The step-down module 105 is configured to step down the second dc electrical signal to obtain a fourth dc electrical signal to power the light emitting module 20.

The voltage reducing module 105 has a voltage regulating function, and the amplitude of the second direct current electric signal can be changed in real time through the voltage reducing module 105 so as to realize voltage reducing treatment of direct current electric energy; the step-down module 105 performs step-down processing on the second dc signal according to the rated power supply requirement of the light emitting module 20, and the fourth dc signal output by the step-down module 105 contains more concentrated and stable electric energy, so that the light emitting module 20 can be adaptively and flexibly powered on through the fourth dc signal, thereby ensuring the power supply stability and flexibility of the light emitting module 20 in the AC power supply mode; therefore, in the AC power supply mode, the electric energy grabbing process of the lamp driving circuit 10 has higher controllability, the application range and the practical value of the lamp driving circuit 10 are improved, and the light emitting module 20 has higher light source control quality and stability.

In the schematic structure of the lamp driving circuit 10 shown in fig. 1, the lamp driving circuit 10 has a simplified module structure, and can be physically connected with the electronic rectifier 30 or the mains supply 40 in a compatible manner to realize corresponding power transmission and power processing functions, and the lamp driving circuit 10 has high power transmission compatibility and power connection compatibility, so that the lamp driving circuit 10 can be universally applied to various different industrial technical fields to meet the light source driving requirements of the light emitting module 20; after the alternating current electric energy output by the electronic rectifier 30 or the alternating current electric energy output by the commercial power 40 is independently processed and converted, the light-emitting module 20 can be powered in real time in an ECG power supply mode or an AC power supply mode, so that the power-on safety and stability of the light-emitting module 20 are ensured, the actual visual requirement of a user can be met through the light source emitted by the light-emitting module 20, the light source driving step of the light-emitting module 20 is further simplified, and the application range is wider; therefore, the lamp driving circuit 10 realizes compatible use of the ECG power supply mode and the AC power supply mode, greatly reduces the lamp driving cost, and the light source driving process of the light emitting module 20 is more convenient and faster; the lamp tube driving circuit 10 can be connected with a power supply mode, and an ECG power supply mode or an AC power supply mode is adopted in a self-adaptive manner to match the power supply power requirement and the power supply mode requirement of the light emitting module 20, so that the lamp tube driving circuit is applicable to various industrial technical fields in a universal manner, the circuit structure of the lamp tube driving circuit 10 is simplified, and great convenience and experience are brought to users; therefore, the problems that the light source driving circuit in the prior art cannot be suitable for different types of light source driving modes, compatibility and flexibility are low, the omnibearing light source driving requirement of a user is difficult to meet, the light source driving cost is high, the circuit structure of the traditional light source driving circuit is complex, and great inconvenience is brought to the use of the user are solved.

As an alternative embodiment, the light emitting module 20 includes at least one light bead, where the light bead is a red light bead, a blue light bead or a green light bead, and the light emitting module 20 can exhibit different light emitting effects so as to meet the actual visual requirement of the user; the ECG power supply function and the AC power supply function can be realized for the light-emitting module 20 through the lamp tube driving circuit 10, the light source driving step of the light-emitting module 20 is greatly simplified, the light source display effect of the light-emitting module 20 can meet the requirements of different industrial sites, the practical value is high, good use experience is brought to users, and the lamp tube driving circuit 10 has a more comprehensive light source driving function.

The AC power output by the electronic rectifier 30 and the AC power output by the mains supply 40 can meet different power supply mode requirements, so that the lamp driving circuit 10 has higher power compatibility and power supply efficiency, and can realize an ECG power supply mode and an AC power supply mode after converting the AC power, and the light source driving process of the lamp driving circuit 10 has higher flexibility.

As an alternative implementation manner, fig. 2 shows another schematic structure of the lamp driving circuit 10 provided in this embodiment, and, compared to the schematic structure of the lamp driving circuit 10 in fig. 1, the lamp driving circuit 10 in fig. 2 further includes: the voltage stabilizing module 106, wherein the voltage stabilizing module 106 is connected with the anti-interference module 104, the voltage reducing module 105 and the light emitting module 20.

The voltage stabilizing module 106 is configured to perform voltage stabilizing processing on the third dc electrical signal or the fourth dc electrical signal, and output the voltage-stabilized third dc electrical signal or the voltage-stabilized fourth dc electrical signal to the light emitting module 20.

The voltage stabilizing module 106 has an electric energy stabilizing function, so that electric energy transmission compatibility and stability between the voltage stabilizing module 106 and the light emitting module 20 are guaranteed, and the light emitting module 20 has higher luminous efficiency and light source input safety; when the lamp driving circuit 10 is in the ECG power supply mode or the AC power supply mode, the voltage stabilizing module 106 can realize the function of stabilizing voltage for the dc power in the specific power supply mode, and inhibit the transmission fluctuation performance and the unstable performance of the dc power, and the light emitting module 20 can be connected with stable and stable power to maintain a good and stable light emitting state; further, the lamp driving circuit 10 can supply power to the light emitting module 20 in real time in any one of the ECG power supply mode and the AC power supply mode, thereby increasing the application range of the lamp driving circuit 10.

As an alternative implementation manner, fig. 3 shows another schematic structure of the lamp driving circuit 10 provided in this embodiment, and, compared to the schematic structure of the lamp driving circuit 10 in fig. 2, the lamp driving circuit 10 in fig. 3 further includes: further comprises: a harmonic suppression module 107 and an electromagnetic interference suppression module 108; the harmonic suppression module 107 is connected with the voltage stabilizing module 106, and the electromagnetic interference suppression module 108 is connected with the voltage stabilizing module 106.

The electromagnetic interference suppression module 108 is configured to perform electromagnetic interference suppression on the third dc electrical signal or the fourth dc electrical signal.

The voltage stabilizing module 106 outputs the dc power after voltage stabilizing and electromagnetic interference suppression to the light emitting module 20, so as to realize a safe ECG power supply mode and an AC power supply function for the light emitting module 20.

The voltage stabilizing module 106 is also connected with the rectifying and filtering module 103, and in the process of transmitting the electric energy, since the direct current electric energy will have larger electromagnetic interference in the transmission process, the electromagnetic interference will cause larger interference to the light source driving stability of the light emitting module 20, thereby affecting the light source quality of the light emitting module 20; therefore, the electromagnetic interference suppression module 108 of the present embodiment can improve the electromagnetic interference resistance of the voltage stabilizing module 106, and the voltage stabilizing module 106 can output more stable and safer electric energy, so as to meet the power supply requirement of the light emitting module 20, and is beneficial to improving the electric energy conversion stability and the use value of the lamp driving circuit 10.

The harmonic suppression module 107 is configured to perform harmonic suppression on the third dc electrical signal or the fourth dc electrical signal.

Specifically, the voltage stabilizing module 106 outputs the dc power after harmonic suppression and voltage stabilizing to the light emitting module 20 to maintain the internal power stability and safety of the light emitting module 20.

Because the direct current electric energy is transmitted in the voltage stabilizing module 106, the amplitude of the third direct current electric signal or the amplitude of the fourth direct current electric signal will fluctuate in a small range, and thus the instability and fluctuation of the power supply electric energy of the light emitting module 20 are caused.

The combination of the harmonic suppression module 107 and the electromagnetic interference suppression module 108 in this embodiment ensures the transmission safety and reliability of the direct current power, and the lamp driving circuit 10 can achieve a higher-precision light source adjustment effect on the light emitting module 20 no matter in the ECG power supply mode or the AC power supply mode, thereby improving the internal power interference resistance and transmission safety of the lamp driving circuit 10.

As an alternative implementation manner, fig. 4 shows another schematic structure of the lamp driving circuit 10 provided in this embodiment, and, compared to the schematic structure of the lamp driving circuit 10 shown in fig. 1, the lamp driving circuit 10 in fig. 4 further includes: the on-off control module 109, the on-off control module 109 connects the power input module 101, the step-down module 105 and the anti-interference module 104.

The on-off control module 109 is configured to switch in the first ac electrical signal or the second ac electrical signal, rectify and divide the first ac electrical signal to obtain a first switch signal, and rectify and divide the second ac electrical signal to obtain a second switch signal.

Wherein the on-off control module 109 has rectification and voltage division functions, and when the electric energy input module 101 is in physical connection with the electronic rectifier 30 or the mains 40, the electric energy input module 101 can realize the function of electric energy transmission, and the lamp driving circuit 10 enters an ECG power supply mode or an AC power supply mode; the on-off control module 109 outputs corresponding switching signals under different power supply modes so as to realize a flexible and self-adaptive power supply control function for the lamp driving circuit 10; the first switch signal or the second switch signal output by the on-off control module 109 can adjust the power conversion and power transmission functions of the lamp driving circuit 10 in real time, so as to realize compatibility switching between the ECG power supply mode and the AC power supply mode of the light emitting module 20, and the flexibility and compatibility of the lamp driving process are high.

The step-down module 105 is configured to enter a stop state according to the first switching signal, and step-down the second dc signal according to the second switching signal to obtain a fourth dc signal, so as to supply power to the light emitting module 20.

When the on-off control module 109 outputs the first switch signal, it indicates that the lamp driving circuit 10 is in the ECG power supply mode, and the step-down module 105 is in a completely stopped state at this time, so as to prevent mutual interference between the ECG power supply mode and the AC power supply mode, and the lamp driving circuit 10 can output stable dc power to the light emitting module 20, so that the power supply stability and safety of the light emitting module 20 are improved; when the on-off control module 109 outputs the second switching signal to the voltage reducing module 105, the voltage reducing module 105 can realize a normal electric energy voltage reducing function, and the voltage reducing module 105 outputs the reduced direct current electric energy to the light emitting module 20, so that the light emitting module 20 can maintain electric energy stability and safety in the AC power supply mode, and the light source driving efficiency and accuracy of the light emitting module 20 are accelerated.

The anti-interference module 104 is configured to receive the rectified first ac electrical signal, and perform anti-interference processing on the first dc electrical signal according to the rectified first ac electrical signal.

When the electric energy input module 101 outputs the first ac electric signal to the on-off control module 109, the on-off control module 109 rectifies the ac electric energy to obtain more stable dc electric energy; because the electric energy interaction function can be realized between the anti-interference module 104 and the on-off control module 109, the anti-interference module 104 can be connected with the rectified first alternating current signal and enter a working state, and a high-precision and safe ECG power supply function is realized for the light emitting module 20; when the anti-interference module 104 does not receive the rectified first alternating current signal, the anti-interference module 104 enters a stop state; therefore, the interference suppression function of the anti-interference module 104 can be controlled by the rectified first ac signal output by the on-off control module 109, so that the high-precision and real-time control function of the light emitting module 20 is realized.

Therefore, after the on-off control module 109 detects and processes the AC power, the present embodiment realizes the self-adapting and switching control functions for the anti-interference module 104 and the buck module 105, thereby ensuring the compatible use between the ECG power supply mode and the AC power supply mode of the lamp driving circuit 10, and maintaining the corresponding independence and reliability of each power supply mode, and improving the light source driving efficiency and accuracy of the light emitting module 20.

As an alternative implementation manner, fig. 5 shows a schematic structural diagram of the buck module 105 provided in this embodiment, referring to fig. 5, the buck module 105 includes: the switching unit 1051, the voltage stabilizing control unit 1052 and the voltage reducing unit 1053, wherein the switching unit 1051 is connected with the on-off control module 109, the voltage stabilizing control unit 1052 is connected with the rectifying and filtering module 103, and the voltage reducing unit 1053 is connected with the switching unit 1051, the voltage stabilizing control unit 1052 and the light emitting module 20.

The switching unit 1051 is configured to be turned on according to a first switching signal, turned off according to a second switching signal, and generate a first control signal.

Wherein the switching unit 1051 has an on-off function to change the circuit function of the step-down module 105; when the switch unit 1051 is turned on, the voltage reducing module 105 cannot realize the voltage reducing function, and the lamp driving circuit 10 is in the ECG power supply mode; when the switching unit 1051 is turned off, the voltage step-down module 105 realizes a corresponding voltage step-down function, and the lamp driving circuit 10 is in an AC power supply mode; the first control signal output by the switching unit 1051 can drive the stability and efficiency of the AC power supply process of the light emitting module 20, and the power supply process of the light emitting module 20 has high control response accuracy.

The voltage stabilizing control unit 1052 is used for accessing the second dc signal and performing voltage stabilizing processing on the second dc signal to obtain the first power signal.

The voltage stabilizing control unit 1052 can realize a voltage stabilizing function on the electric energy, so that the first power supply signal contains more stable and accurate direct current electric energy, the first power supply signal output by the voltage stabilizing control unit 1052 can provide stable electric energy for electronic components, and the safety and stability of AC power supply can be ensured through the first power supply signal; therefore, the voltage stabilizing control unit 1052 has higher power information conversion efficiency, the multiplexing of power is realized by utilizing the voltage stabilizing function of the voltage stabilizing control unit 1052, the lamp driving circuit 10 has higher power supply safety and high efficiency, and the voltage reducing module 105 realizes high-efficiency control function in the AC power supply mode, so that the power input safety of the light emitting module 20 is ensured.

The step-down unit 1053 is configured to step down the first power signal according to the first control signal to obtain a fourth dc signal.

The voltage reducing unit 1053 has higher electric energy amplitude adjustment precision, the voltage reducing unit 1053 performs real-time voltage reducing processing on the direct current electric energy output by the voltage stabilizing control unit 1052, and the fourth direct current electric signal output by the voltage reducing unit 1053 can safely meet the power supply requirement of the light emitting module 20 so as to ensure the electric energy stability of the light emitting module 20 in the AC power supply mode; therefore, the voltage reducing unit 1053 can realize a flexible voltage reducing function through the first control signal, which is beneficial to guaranteeing the internal power conversion efficiency of the lamp driving circuit 10, and the voltage reducing module 105 can guarantee the AC power supply safety of the light emitting module 20, so that the light emitting module 20 has higher light emitting quality.

As an alternative implementation manner, fig. 6 shows a schematic structural diagram of the power input module 101 provided in this embodiment, referring to fig. 6, the power input module 101 includes: a first power input unit 1011 and a second power input unit 1012; the first power input unit 1011 is connected to the frequency selective absorption module 102, and the second power input unit 1012 is connected to the frequency selective absorption module 102.

The first power input unit 1011 is used for connecting the electronic rectifier 30 or the commercial power 40; when the electronic rectifier 30 is connected, the first alternating current signal output by the electronic rectifier 30 is transmitted, and when the commercial power 40 is connected, the second alternating current signal output by the commercial power 40 is transmitted.

The second power input unit 1012 is used for connecting the electronic rectifier 30 or the mains 40; when the electronic rectifier 30 is connected, the first ac signal output by the electronic rectifier 30 is transmitted, and when the mains supply 40 is connected, the second ac signal output by the mains supply 40 is transmitted.

In the embodiment, the first power input unit 1011 and the second power input unit 1012 are utilized to respectively realize the power transmission function, so that the power compatibility of the lamp driving circuit 10 and the efficiency of lamp driving are improved, and the lamp driving circuit 10 can be applied to various different industrial technical fields to achieve the effect of driving the light source of the light emitting module 20; therefore, the electronic rectifier 30 or the utility power 40 can be selectively connected to any one of the first power input unit 1011 and the second power input unit 1012, the operation steps of the light source driving process are simple and convenient, the power input precision and efficiency of the light emitting module 20 are greatly improved, the light source emitted by the light emitting module 20 can completely meet the visual requirement of a user, the precision and stability of the internal power transmission of the light tube driving circuit 10 are higher, the light source driving steps of the light emitting module 20 are simplified, and the practical value and stability of the light tube driving circuit 10 are improved.

As an alternative implementation manner, fig. 7 shows another schematic structure of the lamp driving circuit 10 provided in this embodiment, and, compared to the schematic structures of the lamp driving circuit 10 shown in fig. 1 and 6, the lamp driving circuit 10 in fig. 7 further includes: the first overcurrent protection module 701 and the second overcurrent protection module 702, wherein the first overcurrent protection module 701 is connected with the first electric energy input unit 1011, and the second overcurrent protection module 702 is connected with the second electric energy input unit 1012.

The first overcurrent protection module 701 is configured to perform overcurrent protection on the first ac electrical signal or the second ac electrical signal when the first power input unit 1011 receives the first ac electrical signal or the second ac electrical signal.

The first overcurrent protection module 701 has an overcurrent protection function to prevent the first power input unit 1011 from being damaged by overcurrent, and the first power input unit 1011 has higher power transmission safety and stability; therefore, when the electronic rectifier 30 or the mains supply 40 is connected to the first power input unit 1011, the power transmitted through the first power input unit 1011 can realize the CEG power supply mode or the AC power supply mode, and the electronic components are prevented from being damaged by the over-temperature phenomenon caused by the over-current, so that the lamp driving circuit 10 has higher power conversion efficiency and accuracy.

The second over-current protection module 702 is configured to over-current protect the first ac electrical signal or the second ac electrical signal when the second electrical energy input unit 1012 receives the first ac electrical signal or the second ac electrical signal.

When the second power input unit 1012 is selected to perform power access, the second power input unit 1012 can implement a power transmission function to implement compatibility and applicability of the CEG power supply mode or the AC power supply mode; the second overcurrent protection module 702 is used for carrying out overcurrent protection on the second electric energy input unit 1012 so as to ensure the safety and reliability of the electronic components of the second electric energy input unit 1012, avoid great damage to the electronic components of the lamp driving circuit 10 caused by overcurrent electric energy, be favorable for ensuring the safety and reliability of the internal electric energy of the lamp driving circuit 10 and have extremely wide application range.

Therefore, the present embodiment sets the overcurrent protection function for the first power input unit 1011 and the second power input unit 1012, respectively, so as to achieve the safety and the high efficiency of the power transmission in the CEG power supply mode and the AC power supply mode, and improve the power-on efficiency and the accuracy of the light emitting module 20.

As an alternative implementation manner, fig. 8 shows another schematic diagram of the lamp driving circuit 10 provided in this embodiment, and, compared to the schematic diagram of the lamp driving circuit 10 in fig. 1, the lamp driving circuit 10 in fig. 8 further includes: a clamp module 801 and an interference suppression module 802; the clamping module 801 is connected between the electric energy input module 101 and the frequency selection absorption module 102; the clamping module 801 is configured to voltage clamp the first ac electrical signal or the second ac electrical signal.

When the lamp driving circuit 10 is in the CEG power supply mode or the AC power supply mode, the electric energy output by both the electronic rectifier 30 and the mains supply 40 will generate larger fluctuation and instability, so that the first AC electric signal or the second AC electric signal exceeds the safe voltage amplitude of the lamp driving circuit 10; since the clamp module 801 absorbs the fluctuation peak of the ac power, the high-voltage power output by the lamp driving circuit 10 is prevented from damaging the light emitting module 20; therefore, the clamping module 801 can make the voltage of the first AC electrical signal or the voltage of the second AC electrical signal be in a preset voltage range, so that the safety and stability of the electronic components inside the lamp driving circuit 10 are ensured on the basis of guaranteeing the light source driving efficiency of the light emitting module 20, and the lamp driving circuit 10 can supply power to the light emitting module 20 in real time in the CEG power supply mode or the AC power supply mode, thereby meeting the light source driving requirement of the user.

The interference suppression module 802 is connected between the power input module 101 and the frequency selection absorption module 102; the interference suppression module 802 is configured to conduct interference suppression on the first ac electrical signal or the second ac electrical signal.

The interference suppression module 802 plays an interference suppression function in the transmission process of the first AC electric signal or the second AC electric signal, so as to ensure the safety and the high efficiency of the electric energy transmission in the CEG power supply mode or the AC power supply mode, improve the internal signal transmission efficiency and the anti-interference performance of the lamp driving circuit 10, and prevent the AC electric signal from being interfered by noise in the transmission process because the first AC electric signal or the second AC electric signal contains more stable electric energy; the lamp tube driving circuit 10 is used for reliably and efficiently supplying power to the light-emitting module 20, so that the power-on efficiency and the power-on accuracy of the lamp tube driving circuit 10 are guaranteed, and the practical value is high.

As an alternative implementation manner, fig. 9 shows a schematic circuit structure of a first power input unit 1011, a second power input unit 1012, a first overcurrent protection module 701, and a second overcurrent protection module 702 provided in this embodiment, and referring to fig. 9, the first power input unit 1011 includes: the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the first capacitor C1 and the second capacitor C2.

The first end of the first resistor R1, the first end of the second resistor R2, the first end of the third resistor R3, the first end of the fourth resistor R4, the first end of the fifth resistor R5, the first end of the sixth resistor R6, the first end of the first capacitor C1 and the first end of the second capacitor C2 are commonly connected to the frequency selective absorption module 102, the second end of the first resistor R1, the second end of the second resistor R2, the second end of the third resistor R3 and the second end of the first capacitor C1 are commonly connected to form a positive phase input end of the first electric energy input unit 1011, and the second end of the fourth resistor R4, the second end of the fifth resistor R5, the second end of the sixth resistor R6 and the second end of the second capacitor C2 are commonly connected to form a negative phase input end of the first electric energy input unit 1011.

The positive phase input end of the first electric energy input unit 1011 and the negative phase input end of the first electric energy input unit 1011 are used for being connected to the electronic rectifier 30 or the commercial power 40, and the first electric energy input unit 1011 has a relatively compatible electric energy transmission function.

As an alternative embodiment, referring to fig. 9, the second power input unit 1012 includes: seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, third capacitor C3, and fourth capacitor C4.

The first end of the seventh resistor R7, the first end of the eighth resistor R8, the first end of the ninth resistor R9, the first end of the third capacitor C3, the first end of the fourth capacitor C4, the first end of the tenth resistor R10, the first end of the eleventh resistor R11, and the first end of the twelfth resistor R12 are commonly connected to the frequency selective absorption module 102, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the ninth resistor R9, and the second end of the third capacitor C3 are commonly connected to form a positive phase input end of the second electric energy input unit 1012, and the second end of the fourth capacitor C4, the second end of the tenth resistor R10, the second end of the eleventh resistor R11, and the second end of the twelfth resistor R12 are commonly connected to form a negative phase input end of the second electric energy input unit 1012.

The positive phase input end of the second electric energy input unit 1012 and the negative phase input end of the second electric energy input unit 1012 are used for being connected to the electronic rectifier 30 or the mains supply 40, and the electric energy transmitted through the second electric energy input unit 1012 can ensure compatibility and applicability of the CEG power supply mode or the AC power supply mode.

As an alternative embodiment, referring to fig. 9, the first overcurrent protection module 701 includes a first overcurrent fuse F1, where the first overcurrent fuse F1 is connected to the first power input unit 1011.

The second overcurrent protection module 702 includes a second overcurrent fuse F2, wherein the second overcurrent fuse F2 is connected to the second power input unit 1012.

When the electronic rectifier 30 or the mains supply 40 is connected to the first electric energy input unit 1011 or the second electric energy input unit 1012, if the electric energy output by the electronic rectifier 30 or the mains supply 40 exceeds the safe current range of the overcurrent fuse, the overcurrent fuse will be disconnected to complete the overcurrent protection function; therefore, the lamp driving circuit 10 in the present embodiment has higher power transmission safety and stability, and realizes a safe and efficient power supply function for the light emitting module 20 in the CEG power supply mode or the AC power supply mode.

As an alternative implementation manner, fig. 10 shows a schematic circuit structure of the voltage stabilizing module 106 provided in this embodiment, referring to fig. 10, the voltage stabilizing module 106 includes: thirteenth resistor R13, fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, eighth capacitor C8, ninth capacitor C9, first diode D1, second diode D2, and first transformer T1.

The first end of the ninth capacitor C9, the cathode of the second diode D2, the first end of the sixth capacitor C6, the first end of the thirteenth resistor R13, and the first end of the fifth capacitor C5 are commonly connected to form a positive phase output end of the voltage stabilizing module 106, and the second end of the fifth capacitor C5 and the anode of the first diode D1 are commonly connected to form a negative phase output end of the voltage stabilizing module 106.

The positive phase output end of the voltage stabilizing module 106 and the negative phase output end of the voltage stabilizing module 106 are connected with the light emitting module 20, and the positive phase output end of the voltage stabilizing module 106 is also connected with the rectifying and filtering module 103, so that a real-time power-on function of the light emitting module 20 is realized.

The cathode of the first diode D1, the second end of the sixth capacitor C6, the second end of the thirteenth resistor R13, the first end of the seventh capacitor C7 and the first end of the eighth capacitor C8 are commonly connected to the first end of the primary winding of the first transformer T1, the second end of the ninth capacitor C9 and the anode of the second diode D2 are commonly connected to the second end of the primary winding of the first transformer T1, the second end of the seventh capacitor C7 is grounded GND, and the second end of the eighth capacitor C8 is grounded GND.

The first end of the secondary winding of the first transformer T1 is connected to the step-down module 105, and the second end of the secondary winding of the first transformer T1 is grounded GND.

Therefore, the voltage stabilizing module 106 in this embodiment has a relatively compatible circuit structure, and realizes a high-efficiency and stable voltage stabilizing function for the direct current power, so that the light emitting module 20 can maintain good power stability in the CEG power supply mode or the AC power supply mode.

As an alternative implementation manner, fig. 11 shows a schematic circuit configuration of a switching unit 1051, a voltage stabilizing control unit 1052, and a voltage reducing unit 1053 provided in this embodiment, and referring to fig. 11, the switching unit 1051 includes: the first end of the fourteenth resistor R14 is connected with the voltage dropping unit 1053, the second end of the fourteenth resistor R14 is connected with the first conducting end of the first switch tube M1, the second conducting end of the first switch tube M1 is grounded GND, the control end of the first switch tube M1 is connected with the on-off control module 109, and on-off is realized through a first switch signal or a second switch signal output by the on-off control module 109.

As an alternative embodiment, referring to fig. 11, the voltage stabilizing control unit 1052 includes: a third diode D3, a fourth diode D4, a fifth diode D5, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a tenth capacitor C10, an eleventh capacitor C11, and a twelfth capacitor C12; the first end of the fifteenth resistor R15 is connected to the rectifying and filtering module 103, the second end of the fifteenth resistor R15 is connected to the first end of the sixteenth resistor R16, the second end of the sixteenth resistor R16, the first end of the seventeenth resistor R17, the first end of the tenth capacitor C10 and the cathode of the fourth diode D4 are commonly connected to the voltage-reducing unit 1053, the anode of the fourth diode D4, the second end of the tenth capacitor C10 and the first end of the eleventh capacitor C11 are commonly connected to the first end of the nineteenth resistor R19, the second end of the eleventh capacitor C11, the second end of the nineteenth resistor R19 and the first end of the eighteenth resistor R18 are commonly connected to the voltage-reducing unit 1053, the cathode of the third diode D3 and the second end of the eighteenth resistor R18 are commonly connected to the anode of the fifth diode D5, the cathode of the fifth diode D5 is commonly connected to the first end of the twelfth capacitor C12, and the second end of the twelfth capacitor C12 is grounded GND.

As an alternative embodiment, referring to fig. 11, the step-down unit 1053 includes: the voltage regulating chip U1, the first inductor L1, the sixth diode D6, the second switching tube M2, the twenty-first resistor R20, the twenty-first resistor R21, the twenty-second resistor R22, the twenty-third resistor R23, the twenty-fourth resistor R24, the twenty-fifth resistor R25 and the thirteenth capacitor C13.

The power input pin VIN of the voltage regulating chip U1 is connected to the switch unit 1051 and the voltage stabilizing control unit 1052, the voltage compensation pin COMP of the voltage regulating chip U1 is connected to the first end of the twenty-first resistor R20, the second end of the twenty-first resistor R20 is connected to the first end of the thirteenth capacitor C13, the voltage stabilizing control pin VSEN of the voltage regulating chip U1 is connected to the voltage stabilizing control unit 1052, the cathode of the sixth diode D6 and the first end of the twenty-first resistor R21 are commonly connected to the voltage output pin DRV of the voltage regulating chip U1, the anode of the sixth diode D6, the second end of the twenty-first resistor R21 and the first end of the twenty-second resistor R22 are commonly connected to the control end of the second switch tube M2, the first turn-on end of the second switch tube M2 is connected to the first end of the first inductor L1, the second end of the twenty-second resistor R22, the first end of the twenty-third resistor R23, the first end of the twenty-third resistor R24 and the fifth end of the twenty-fourth resistor R24 are commonly connected to the voltage detecting chip R25, and the twenty-second end of the twenty-second resistor R25 is connected to the voltage ground GND 25.

The voltage regulating chip U1 is exemplified by the following model: SY5839, therefore, the voltage reduction function of the first power signal is realized through the voltage regulating chip U1, so that the AC power supply safety and efficiency of the light emitting module 20 are ensured.

As an alternative implementation manner, fig. 12 shows a schematic circuit structure of the anti-interference module 104 provided in this embodiment, referring to fig. 12, the anti-interference module 104 includes: the third switching tube M3, the fourth switching tube M4, the fifth switching tube M5, the seventh diode D7, the eighth diode D8, the twenty-sixth resistor R26, the twenty-seventh resistor R27, the twenty-eighth resistor R28, the twenty-ninth resistor R29, the thirty-third resistor R30, the fourteenth capacitor C14, and the fifteenth capacitor C15.

The first end of the twenty-eighth resistor R28 and the first end of the twenty-ninth resistor R29 are commonly connected to the rectifying and filtering module 103, the second end of the twenty-ninth resistor R29 and the first end of the thirty-sixth resistor R30 are commonly connected to the control end of the fifth switching tube M5, the second end of the twenty-eighth resistor R28 is connected to the anode of the eighth diode D8, the cathode of the eighth diode D8, the first end of the fifteenth capacitor C15, the cathode of the seventh diode D7, the first end of the twenty-seventh resistor R27 and the first conducting end of the fourth switching tube M4 are commonly connected to the control end of the third switching tube M3, the control end of the fourth switching tube M4, the first end of the fourteenth capacitor C14 and the first end of the twenty-sixth resistor R26 are used to connect to the rectifying and filtering module 103, the second end of the thirty-eighth resistor R30, the second conducting end of the fifth switching tube M5, the second end of the fifteenth capacitor C15, the anode of the seventh diode D7, the first conducting end of the seventh resistor R27, the second end of the fourth capacitor C14 and the fourth conducting end of the fourth switching tube M4 are commonly connected to the fourth switching tube M3 and the fourth conducting end of the fourth switching tube M20.

When the lamp driving circuit 10 is in the ECG power supply mode, the on or off states of the third switch tube M3, the fourth switch tube M4 and the fifth switch tube M5 are combined to realize the corresponding interference suppression function, so that the power supply safety and reliability of the light emitting module 20 in the ECG power supply mode are ensured.

As an alternative implementation manner, fig. 13 shows a schematic circuit structure of the on-off control module 109 provided in this embodiment, referring to fig. 13, the on-off control module 109 includes: rectifier DB1, sixteenth capacitor C16, seventeenth capacitor C17, eighteenth capacitor C18, nineteenth capacitor C19, thirty-first resistor R31, thirty-second resistor R32, thirty-third resistor R33, and ninth diode D9.

The rectifier DB1 includes a plurality of diodes, and the ac power can be rectified by the rectifier DB1 to output dc power.

The first end of the sixteenth capacitor C16 is connected to the power input module 101, the second end of the sixteenth capacitor C16 and the first end of the seventeenth capacitor C17 are commonly connected to the first voltage input end of the rectifier DB1, the second end of the seventeenth capacitor C17 and the first end of the eighteenth capacitor C18 are commonly connected to the second voltage input end of the rectifier DB1, and the second end of the eighteenth capacitor C18 is connected to the power input module 101.

The first terminal of the nineteenth capacitor C19 and the anode of the ninth diode D9 are commonly connected to the first voltage output terminal of the rectifier DB1, and the second terminal of the nineteenth capacitor C19, the cathode of the ninth diode D9, and the first terminal of the thirty-first resistor R31 are commonly connected to the second voltage output terminal of the rectifier DB 1.

The second end of the thirty-first resistor R31 and the first end of the thirty-second resistor R32 are commonly connected to the anti-interference module 104, the second end of the thirty-second resistor R32 and the first end of the thirty-third resistor R33 are commonly connected to the voltage dropping module 105, and the second end of the thirty-third resistor R33 is grounded GND.

When the electric energy input module 101 outputs the first AC electric signal or the second AC electric signal, the sixteenth capacitor C16, the seventeenth capacitor C17 and the eighteenth capacitor C18 are combined to couple the electric energy output by the electric energy input module 101 to obtain power, and then the power is rectified and filtered to output the first switch signal or the second switch signal respectively, so as to realize the flexible control function of the anti-interference module 104 and the voltage reduction module 105, and greatly ensure the ECG power supply stability and the AC power supply stability of the light emitting module 20.

As an alternative implementation manner, fig. 14 shows a schematic circuit structure of the frequency selective absorption module 102 provided in this embodiment, referring to fig. 14, the frequency selective absorption module 102 includes: a second inductor L2, a twentieth capacitor C20, and a twenty-first capacitor C21; the first end of the second inductor L2 is connected to the electric energy input module 101, the second end of the second inductor L2 and the first end of the twentieth capacitor C20 are commonly connected to the rectifying and filtering module 103, the second end of the twentieth capacitor C20 is connected to the first end of the twenty-first capacitor C21, and the second end of the twenty-first capacitor C21 is connected to the electric energy input module 101 and the rectifying and filtering module 103; therefore, the frequency selective absorption module 102 in this embodiment has a simplified circuit structure, and can realize the frequency selective absorption function of signals, and can play a role in current limiting in the ECG power supply mode.

Fig. 15 shows a schematic structure of a lamp 150 provided in this embodiment, wherein the lamp 150 includes: a light emitting module 20 and a lamp driving circuit 10 as described above; the light-emitting module 20 is connected with the lamp tube driving circuit 10, and the lamp tube driving circuit 10 is used for supplying power to the light-emitting module 20; referring to the embodiment of fig. 1 to 14, the lamp driving circuit 10 can drive the light emitting module 20 to emit light in the ECG power supply mode and the AC power supply mode, so as to improve the power supply control flexibility and compatibility of the light emitting module 20 and reduce the application cost of the lamp 150.

Various embodiments are described herein for various devices, circuits, apparatuses, systems and/or methods. Numerous specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and shown in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the specification. It will be appreciated by persons skilled in the art that the embodiments described and illustrated herein are non-limiting examples, and thus it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.

Reference throughout this specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic shown or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without assuming that such combination is not an undue or non-functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.

Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Connection references (e.g., attached, coupled, connected, etc.) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, a connective reference does not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be construed broadly and used to provide non-limiting examples of embodiments of the present disclosure, and the present disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from this disclosure.

The foregoing description of the preferred embodiment of the present invention is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims

1. A lamp tube driving circuit compatible with an electronic rectifier and a mains supply, comprising: the device comprises an electric energy input module, a frequency selection absorption module, a rectification filter module, an anti-interference module, an on-off control module and a voltage reduction module;

the frequency selection absorption module is configured to present low impedance characteristics to signals in a preset frequency band and present high impedance characteristics to signals not in the preset frequency band, and is used for carrying out frequency selection absorption on the first alternating current signal to obtain a third alternating current signal when the first alternating current signal is received or transmitting the second alternating current signal when the second alternating current signal is received;

the voltage reduction module is used for entering a stop state according to the first switch signal, and carrying out voltage reduction processing on the second direct current signal according to the second switch signal to obtain a fourth direct current signal so as to supply power to the light emitting module;

the voltage reduction module further comprises a switch unit, a voltage stabilizing control unit and a voltage reduction unit, wherein the switch unit is connected with the on-off control module, the voltage stabilizing control unit is connected with the rectifying and filtering module, and the voltage reduction unit is connected with the switch unit, the voltage stabilizing control unit and the light-emitting module;

2. The lamp driving circuit as claimed in claim 1, further comprising: the voltage stabilizing module is connected with the anti-interference module, the voltage reducing module and the light emitting module;

3. The lamp driving circuit according to claim 2, further comprising: a harmonic suppression module and an electromagnetic interference suppression module; the harmonic suppression module is connected with the voltage stabilizing module, and the electromagnetic interference suppression module is connected with the voltage stabilizing module;

4. The lamp driving circuit as claimed in claim 1, further comprising: an on-off control module; the on-off control module is connected with the electric energy input module and the anti-interference module;

5. The lamp driving circuit according to claim 1, wherein the power input module comprises: a first power input unit and a second power input unit; the first electric energy input unit is connected with the frequency selection absorption module, and the second electric energy input unit is connected with the frequency selection absorption module;

6. The lamp driving circuit as recited in claim 5, further comprising: the first overcurrent protection module is connected with the first electric energy input unit, and the second overcurrent protection module is connected with the second electric energy input unit;

7. The lamp driving circuit as claimed in claim 1, further comprising: a clamping module; the clamping module is connected between the electric energy input module and the frequency-selecting absorption module;

8. The lamp driving circuit as claimed in claim 1, further comprising: an interference suppression module; the interference suppression module is connected between the electric energy input module and the frequency selection absorption module;

9. A luminaire, comprising:

a light emitting module; and

the lamp driving circuit according to any one of claims 1 to 8; the light-emitting module is connected with the lamp tube driving circuit, and the lamp tube driving circuit is used for supplying power to the light-emitting module.