CN110708791A

CN110708791A - Lamp tube driving circuit compatible with electronic rectifier and mains supply and lamp

Info

Publication number: CN110708791A
Application number: CN201910987244.6A
Authority: CN
Inventors: 李胜森; 罗杨洋; 杨林; 杨海涛
Original assignee: Shenzhen Haoen Intelligent Joint Ltd By Share Ltd
Current assignee: Shenzhen Haoen Intelligent Joint Ltd By Share Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-01-17
Anticipated expiration: 2039-10-17
Also published as: CN110708791B

Abstract

A lamp tube driving circuit and a lamp compatible with an electronic rectifier and commercial power are provided, the lamp tube driving circuit includes: the device comprises an electric energy input module, a frequency-selecting absorption module, a rectifying and filtering module, an anti-interference module and a voltage reduction module; the electric energy input module can be compatibly connected with an electronic rectifier or commercial power, and the compatibility and the reliability of the circuit structure are higher; when the lamp tube driving circuit is connected to the electronic rectifier, the lamp tube driving circuit rectifies and filters a 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 to the commercial power, the lamp tube driving circuit performs rectification, filtering and voltage reduction processing on a second alternating current signal output by the commercial power, and then realizes a commercial power supply function for the light-emitting module; therefore, the embodiment of the application can compatibly realize the power supply mode of the electronic rectifier and the power supply mode of the commercial power, 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 and a lamp which are compatible with an electronic rectifier and mains supply.

Background

With the continuous improvement of living standard of people, people develop various types of light source equipment in succession, wherein the light source equipment has different light source driving modes, and each light source equipment also emits light sources with different colors and brightness, so that the visual requirements of the people on various light sources are met, and good visual experience is brought to the 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 relatively low, the self luminous state can be changed according to the actual operation requirement of a user, and the controllability is relatively strong, the light source equipment has realized various purposes such as illumination, decoration, advertisement and the like, and becomes an indispensable electronic component in modern production and life.

With the diversification of the types of the light source equipment, each type of the light source equipment must adopt a corresponding type of driving circuit so as to meet the driving control requirements of the light source equipment; however, the light source device in the conventional technology can only be used in a matching manner with a specific type of driving circuit, the driving mode of the light source device has high unicity, and the light source device cannot be used in a compatible manner, which not only results in high driving cost of the light source device and more complicated control steps, but also brings great inconvenience to users.

Disclosure of Invention

In view of this, embodiments of the present application provide a lamp tube driving circuit and a lamp that are compatible with an electronic rectifier and a commercial power, and aim to solve the problems that a light source driving circuit in a conventional technical scheme cannot meet light source driving requirements of light source devices of different types, and is low in compatibility and reliability, so that the cost of light source driving is high, the circuit structure is complex, and the practical value is low.

A first aspect of an embodiment 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-selecting absorption module, a rectifying and filtering module, an anti-interference module and a voltage reduction module;

the electric energy input module is connected with the frequency-selective absorption module, the frequency-selective absorption module is connected with the rectification filter module, the anti-interference module is connected with the rectification filter module and the light-emitting module, and the voltage reduction module is connected with the rectification filter 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, a first alternating current signal output by the electronic rectifier is transmitted, or when the commercial power is connected, a second alternating current signal output by the commercial power is transmitted;

the frequency-selective absorption module is used for carrying out frequency-selective absorption on the first alternating current signal to obtain a third alternating current signal when receiving the first alternating current signal, or carrying out transmission on the second alternating current signal when receiving the second alternating current signal;

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

the anti-interference module is used for performing 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 signal to obtain a fourth direct current signal so as to supply power to the light emitting module.

In one embodiment, 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 performing voltage stabilizing processing on the third direct current signal or the fourth direct current signal and outputting the third direct current signal after voltage stabilizing processing or the fourth direct current signal after voltage stabilizing processing to the light emitting module.

In one embodiment, the method further comprises: the harmonic suppression module and the 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 signal or the fourth direct current signal;

the harmonic suppression module is configured to perform harmonic suppression on the third direct-current signal or the fourth direct-current signal.

In one embodiment thereof, an 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 switching signal, and rectifying and dividing the second alternating current signal to obtain a second switching 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 a 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, the voltage reduction module comprises: the switch unit is connected with the on-off control module, the voltage stabilization control unit is connected with the rectification filtering module, and the voltage reduction unit is connected with the switch unit, the voltage stabilization control unit and the light-emitting module;

the switch unit is used for conducting according to the first switch signal, and conducting switching-off according to the second switch signal to generate a first control signal;

the voltage stabilization control unit is used for accessing the second direct current signal and performing voltage stabilization processing on the second direct current signal to obtain a first power supply signal;

the voltage reduction unit is used for carrying out voltage reduction processing on the first power supply signal according to the first control signal to obtain the fourth direct current signal.

In one embodiment, 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-selective absorption module, and the second electric energy input unit is connected with the frequency-selective absorption module;

the first electric energy input unit is used for being connected to 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;

the second electric energy input unit is used for being connected to 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, 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 signal or the second alternating current signal when the first electric energy input unit receives the first alternating current signal or the second alternating current signal;

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

In one embodiment, the method further comprises: a clamping module; the clamping module is connected between the electric energy input module and the frequency-selective 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, the method further comprises: an interference suppression module; the interference suppression module is connected between the electric energy input module and the frequency-selective 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 an embodiment of the present application provides a luminaire, comprising:

a light emitting module; and

the lamp tube 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 commercial power can be compatible with the power supply mode of the electronic rectifier and the power supply mode of the commercial power, so that the 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 guaranteed; the electric energy input module can be compatible with the connection mode of an electronic rectifier or commercial power, so that the physical compatibility and the electric energy transmission stability of the lamp tube driving circuit are greatly guaranteed; after the electric energy output by the electronic rectifier or the electric energy output by commercial power is respectively processed and converted by the circuit module in the lamp tube driving circuit, the light-emitting module can be connected with rated direct current electric energy, and the power-on efficiency and the power-on safety of the light-emitting module are greatly improved; therefore, the electronic rectifier power supply mode and the commercial power supply mode are independently carried out on the light-emitting module in the embodiment without mutual interference, the transmission efficiency of electric energy in the lamp tube driving circuit is guaranteed, and the application range is wider; the lamp tube driving circuit can be suitable for different industrial technical fields, safe light source driving is carried out on the light emitting module on the basis that the internal circuit structure of the lamp tube driving circuit is not required to be changed, 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 favorably simplified, the circuit installation and the design cost are saved, and great convenience is brought to the use of a user.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of another 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 structural diagram 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 structural diagram 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 voltage reduction module according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an electric energy input module according to an embodiment of the present application;

fig. 7 is a schematic structural diagram 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 structural diagram 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 structure of a voltage regulator module according to an embodiment of the present application;

fig. 11 is a schematic circuit structure of the switching unit, the voltage stabilization control unit, and the voltage reduction unit according to an embodiment of the present application;

fig. 12 is a schematic circuit structure of an anti-jamming module according to an embodiment of the present application;

fig. 13 is a schematic circuit structure of an on-off control module according to an embodiment of the present application;

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 is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that, according to the principle of lamp driving, the lamp driving method is divided into: an Electronic Rectifier (ECG) power supply mode and an Alternating Current (AC) power supply mode, in the ECG power supply mode, converting electric energy through integrated Electronic components and outputting high-frequency AC electric energy, which is (30-100V) 20-140 KH AC electric energy for example; the high-frequency alternating current electric energy has high electric energy compatibility and stability, and an ECG power supply mode needs more complex electronic components; in the AC power supply mode, only a small electronic component is needed to realize the conversion function of the electric energy so as to achieve the electrifying effect of the lamp tube, wherein in the AC power supply mode, the low-frequency alternating current electric energy (220 plus 240V)50-60HZ alternating current electric energy is converted to realize the electrifying effect of the lamp tube; therefore, due to the great difference between the electric energy of the ECG power supply mode and the electric energy of the AC power supply mode, the driving circuit in the conventional technology can only be applied to one of the ECG power supply mode and the AC power supply mode, which results in higher cost of driving the lamp tube, larger circuit complexity of the lamp tube driving circuit and lower compatibility; therefore, the lamp tube driving circuit provided by the embodiment of the application can be compatible with an AC power supply mode and an ECG power supply mode, and brings great convenience to users.

Referring to fig. 1, in the structural schematic diagram of the lamp driving circuit 10 compatible with the electronic rectifier and the commercial power provided in the embodiment of the present application, the lamp driving circuit 10 is connected to the light emitting module 20, and the lamp driving circuit 10 can implement an ECG power supply mode and an AC power supply mode for the light emitting module 20, thereby simplifying the circuit structure; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:

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

The electric energy input module 101 is connected with the frequency-selective absorption module 102, the frequency-selective 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 then, higher communication compatibility can be realized between the internal circuit modules of the lamp driving circuit 10 to realize a good light source driving function of the light emitting module 20, and the light source driving efficiency and the control precision of the lamp 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 transmits a first alternating current signal output by the electronic rectifier 30 when the electronic rectifier 30 is connected, or transmits a second alternating current signal output by the commercial power 40 when the commercial power 40 is connected.

The electronic rectifier 30 and the commercial power 40 both have an electric energy output function to provide better electric energy for the light-emitting module 20, thereby ensuring the power supply continuity and safety of the light-emitting module 20; the first alternating current signal and the second alternating current signal have different frequencies, wherein the first alternating current signal is a high-frequency alternating current signal of 20-140 KHZ, and the second alternating current signal is a low-frequency alternating current signal of 50-60 HZ; therefore, the first alternating current signal and the second alternating current signal are combined to meet the power supply requirement of the lamp tube, and the rated power-on requirement of the light-emitting module 20 is met.

The electric energy input module 101 in this embodiment has higher physical connection compatibility, and electric energy transmission is realized between the electric energy input module 101 and any one of the electronic rectifier 30 and the commercial power 40; 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 ac electric 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 a second alternating current signal output by the commercial power 40; therefore, the lamp driving circuit 10 in this 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 high electric energy transmission precision and electric energy transmission efficiency, power supply safety and reliability of the lamp tube driving circuit 10 are guaranteed, and the lamp tube driving circuit 10 can achieve high conversion precision and control flexibility on alternating current electric energy.

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

The frequency-selective absorption module 102 can present a low impedance characteristic to signals within a preset frequency band and a high impedance characteristic to signals not within the preset frequency band, and the frequency-selective 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 interfered by overcurrent power in the ECG power supply mode; therefore, when the electric energy input module 101 outputs the first alternating current signal to the frequency-selective absorption module 102, the frequency-selective absorption module 102 only realizes the frequency-selective processing function for the first alternating current signal, and the electric energy safety and reliability of the electronic component in the ECG power supply mode are guaranteed; when the electric energy input module 101 outputs the second alternating current signal to the frequency selective absorption module 102, the frequency selective absorption module 102 does not implement a frequency selective processing function on the second alternating current signal, the alternating current electric energy output by the commercial power 40 can maintain a compatible and fast transmission function in the lamp tube driving circuit 10, so that the electric energy power transmission precision of the second alternating current signal is ensured, and the lamp tube driving circuit 10 can implement higher power supply power for electronic components in an AC power supply mode.

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

In the AC power supply mode, the rectifying and filtering module 103 has an electric energy rectifying function, and by performing real-time rectification and filtering on the AC electric energy, the second dc electric signal has a specific voltage amplitude and a specific current amplitude, and the dc electric energy output by the rectifying and filtering module 103 can meet the power supply accuracy requirement of the light emitting module 20, thereby improving the compatibility and power supply stability of the lamp driving circuit 10.

The rectifying and filtering module 103 has a rectifying and filtering function, and can output stable direct current electric energy after rectifying and filtering the alternating current electric energy through the rectifying and filtering module 103 so as to ensure high efficiency and high reliability of the lamp tube driving process; 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 precision of the light-emitting module 20 is accelerated; therefore, the rectifying and filtering module 103 in this embodiment can implement rectifying and filtering functions for various types of AC power, the lamp driving circuit 10 can be applied to various different working environments, and the lamp driving circuit 10 can implement a compatible power-on function of the light emitting module 20 in an ECG power supply mode or an 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 generated during the turn-on or turn-off of the electronic component, or even by false triggering of voltage noise, which affects the power supply stability and safety of the light emitting module 20; therefore, in the embodiment, the anti-interference module 104 can filter various noise amounts of the direct current electric energy in the transmission process, so as to improve the electric energy precision and efficiency of the third direct current electric signal, and ensure the safety and anti-interference performance of the ECG power supply to the light emitting module 20; therefore, the lamp driving circuit 10 can be universally applied to different communication environments, and can perform accurate and real-time conversion on 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 the practical value is higher.

The voltage-reducing module 105 is configured to reduce the voltage of the second dc signal to obtain a fourth dc signal, so as to supply power to the light-emitting module 20.

The voltage reduction module 105 has a voltage regulation function, and the amplitude of the second direct current signal can be changed in real time through the voltage reduction module 105, so that the voltage reduction processing of the direct current electric energy is realized; illustratively, the voltage reduction module 105 performs voltage reduction processing on the second direct current signal according to the rated power requirement of the light emitting module 20, the fourth direct current signal output by the voltage reduction module 105 contains more concentrated and stable electric energy, and the light emitting module 20 can be adaptively and flexibly powered up by the fourth direct current signal, so that the power supply stability and flexibility of the light emitting module 20 in the AC power supply mode are ensured; therefore, in the AC power supply mode, the electric energy capturing and exchanging 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 structural schematic 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 to an electronic rectifier 30 or a commercial power supply 40 for implementing 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 different industrial technologies for meeting 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 mains supply 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, the power-on safety and stability of the light-emitting module 20 are guaranteed, the actual visual requirements of users can be met through a 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 wide; therefore, the lamp driving circuit 10 realizes the compatible use of the ECG power supply mode and the AC power supply mode, greatly reduces the lamp driving cost, and makes the light source driving process of the light emitting module 20 more convenient and faster; the lamp driving circuit 10 can be connected to a power supply form, 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 form requirement of the light emitting module 20, so that the lamp driving circuit can be universally applied to different industrial technical fields, the circuit structure of the lamp driving circuit 10 is simplified, and great use convenience and use experience are brought to the use of a user; therefore, the problems that the light source driving circuit in the traditional technology cannot be suitable for different types of light source driving forms, compatibility and flexibility are low, the requirement of users for all-dimensional light source driving is difficult to meet, the cost of light source driving is high, the circuit structure of the traditional light source driving circuit is complex, and great inconvenience is brought to users in use are solved.

As an optional implementation manner, the light emitting module 20 includes at least one lamp bead, wherein the lamp bead is a red lamp bead, a blue lamp bead or a green lamp bead, and the light emitting module 20 can present different light emitting effects to meet the actual visual demand of the user; can realize ECG power supply function and AC power supply function to luminous module 20 through fluorescent tube drive circuit 10, greatly simplify luminous module 20's light source drive step, luminous module 20's light source display effect can satisfy the industry place demand of each difference, and practical value is higher, has brought good use for the user and has experienced, and fluorescent tube drive circuit 10 has more comprehensive light source drive function.

The alternating current power output by the electronic rectifier 30 and the alternating current power output by the commercial power 40 can meet different power supply mode requirements, and then the lamp driving circuit 10 has high power compatibility and power supply efficiency, and can realize an ECG power supply mode and an AC power supply mode after the alternating current power is converted, and the light source driving process of the lamp driving circuit 10 has high flexibility.

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

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

The voltage stabilizing module 106 has an electric energy stabilizing function to ensure electric energy transmission compatibility and stability between the voltage stabilizing module 106 and the light emitting module 20, and the light emitting module 20 has high 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 implement a voltage stabilizing function on the dc power in the specific power supply mode, so as to suppress transmission fluctuation performance and instability performance of the dc power, and the light emitting module 20 can access 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, fig. 3 shows another structural schematic of the lamp driving circuit 10 provided in this embodiment, and compared with the structural schematic of the lamp driving circuit 10 in fig. 2, the lamp driving circuit 10 in fig. 3 further includes: further comprising: a harmonic suppression module 107 and an electromagnetic interference suppression module 108; the harmonic suppression module 107 is connected with the voltage stabilization module 106, and the electromagnetic interference suppression module 108 is connected with the voltage stabilization module 106.

The electromagnetic interference suppression module 108 is configured to perform electromagnetic interference suppression on the third direct current signal or the fourth direct current 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 implement a safe ECG power supply mode and an AC power supply function for the light emitting module 20.

For example, the voltage regulation module 106 is further connected to the rectification filter module 103, and since the voltage regulation module 106 has large electromagnetic interference in the transmission process of the electric energy, the electromagnetic interference will cause large interference to the light source driving stability of the light emitting module 20, and further affect the light source quality of the light emitting module 20; therefore, in this embodiment, the electromagnetic interference rejection module 108 can improve the electromagnetic interference rejection capability of the voltage stabilizing module 106, and the voltage stabilizing module 106 can output electric energy with more stable and safe precision, so as to meet the power supply requirement of the light emitting module 20, which 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 signal or the fourth dc signal.

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

In the process of transmitting the dc power inside the voltage stabilizing module 106, the amplitude of the third dc power signal or the amplitude of the fourth dc power signal will fluctuate within a small range, thereby causing instability and fluctuation of the power supply power of the light emitting module 20, in this embodiment, the harmonic suppression module 107 can effectively eliminate the harmonic component in the dc power, so that the dc power output by the voltage stabilizing module 106 has anti-interference performance and stability, the lamp driving circuit 10 can perform rapid conversion on the ac power, so as to realize a high-precision driving function for the light emitting module 20, and meet the omnidirectional light source control requirements of users.

In the embodiment, the harmonic suppression module 107 and the electromagnetic interference suppression module 108 are combined to ensure the transmission safety and reliability of the direct current electric energy, and no matter in the ECG power supply mode or the AC power supply mode, the lamp driving circuit 10 can achieve a higher-precision light source adjustment effect on the light emitting module 20, thereby improving the internal electric energy anti-interference performance and the transmission safety of the lamp driving circuit 10.

As an alternative implementation, fig. 4 shows another structural schematic of the lamp driving circuit 10 provided in this embodiment, and compared with the structural schematic 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 is connected with the electric energy input module 101, the voltage reduction module 105 and the anti-interference module 104.

The on-off control module 109 is configured to access the first ac electrical signal or the second ac electrical signal, perform rectification and voltage division on the first ac electrical signal to obtain a first switching signal, and perform rectification and voltage division on the second ac electrical signal to obtain a second switching signal.

The on-off control module 109 has the functions of rectification and voltage division, when the electrical energy input module 101 is physically connected with the electronic rectifier 30 or the mains supply 40, the electrical energy input module 101 can realize the function of electrical 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 switch signals in different power supply modes to realize flexible and 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 implement compatible 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 voltage reduction module 105 is configured to enter a stop state according to the first switch signal, and perform voltage reduction processing on the second dc signal according to the second switch 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 voltage reduction module 105 is in the complete stop state, 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, thereby improving the power supply stability and safety of the light emitting module 20; when the on-off control module 109 outputs the second switch signal to the voltage-reducing module 105, the voltage-reducing module 105 can realize a normal electric energy voltage-reducing function, and the direct current electric energy after voltage reduction is output to the light-emitting module 20 through the voltage-reducing module 105, so that the light-emitting module 20 can keep electric energy stability and safety in an AC power supply mode, and the light source driving efficiency and accuracy of the light-emitting module 20 are improved.

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 alternating current signal to the on-off control module 109, the on-off control module 109 rectifies the alternating current electric energy to obtain more stable direct current 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 access 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 rectified first ac signal output by the on-off control module 109 can control the interference suppression function of the anti-interference module 104, thereby implementing the high-precision and real-time control function of the light-emitting module 20.

Therefore, in this embodiment, after the on-off control module 109 detects and processes the AC power, the anti-interference module 104 and the voltage reduction module 105 are self-adapted and switched to control, which not only ensures the ECG power supply mode and the AC power supply mode of the lamp driving circuit 10 to be compatible for use, but also enables each power supply mode to maintain corresponding independence and reliability, thereby improving the light source driving efficiency and accuracy of the light emitting module 20.

As an alternative implementation, fig. 5 shows a schematic structure of the voltage reduction module 105 provided in this embodiment, please refer to fig. 5, in which the voltage reduction module 105 includes: switch unit 1051, steady voltage control unit 1052 and step-down unit 1053, switch unit 1051 is connected with on-off control module 109, and steady voltage control unit 1052 connects rectifier filter module 103, and step-down unit 1053 connects switch unit 1051, steady voltage control unit 1052 and light emitting module 20.

The switch unit 1051 is configured to turn on according to the first switch signal, turn off according to the second switch signal, and generate a first control signal.

The switch unit 1051 has an on-off function to change the circuit function of the voltage reduction 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 switch unit 1051 is turned off, the voltage-reducing module 105 implements a corresponding voltage-reducing function, and the lamp driving circuit 10 is in an AC power supply mode; the stability and efficiency of the AC power supplying process of the light emitting module 20 can be driven by the first control signal outputted from the switching unit 1051, and the power supplying process of the light emitting module 20 has high control response accuracy.

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

The voltage stabilization control unit 1052 can realize a voltage stabilization function for 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 stabilization control unit 1052 can provide stable electric energy for electronic components, and the safety and stability of AC power supply can be guaranteed through the first power supply signal; therefore, the voltage regulation control unit 1052 has higher electric energy information conversion efficiency, the multiplexing of electric energy is realized by using the voltage regulation function of the voltage regulation control unit 1052, the lamp driving circuit 10 has higher electric energy supply safety and high efficiency, the voltage reduction module 105 realizes the high-efficiency control function in the AC power supply mode, and the electric energy input safety of the light emitting module 20 is ensured.

The voltage reduction unit 1053 is configured to perform voltage reduction processing on the first power signal according to the first control signal to obtain a fourth dc signal.

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

As an alternative implementation, fig. 6 shows a schematic structure of the power input module 101 provided in this embodiment, please refer to fig. 6, where 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, a first alternating current signal output by the electronic rectifier 30 is transmitted, and when the commercial power 40 is connected, a 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 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.

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 and the lamp driving efficiency of the lamp driving circuit 10 are improved, and the lamp driving circuit 10 is applicable to various industrial technical fields to achieve the light source driving effect of the light emitting module 20; therefore, the electronic rectifier 30 or the utility power 40 can be selectively connected to either the first power input unit 1011 or the second power input unit 1012, the operation steps of the light source driving process are simple, 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 requirements of users, the precision and stability of the internal power transmission of the lamp 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 lamp driving circuit 10 are improved.

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

The first overcurrent protection module 701 is configured to perform overcurrent protection on the first alternating current signal or the second alternating current signal when the first power input unit 1011 receives the first alternating current signal or the second alternating current 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 commercial power 40 is connected to the first power input unit 1011, the power transmitted through the first power input unit 1011 can realize a CEG power supply mode or an AC power supply mode, and prevent the electronic components from being damaged by high temperature due to an over-temperature phenomenon caused by an overcurrent, and the lamp driving circuit 10 has higher power conversion efficiency and accuracy.

The second overcurrent protection module 702 is configured to perform overcurrent protection on 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 for power access, the second power input unit 1012 can implement a power transmission function to implement compatibility and applicability of a CEG power supply mode or an AC power supply mode; the second overcurrent protection module 702 performs overcurrent protection on the second electric energy input unit 1012 to ensure the safety and reliability of the electronic components of the second electric energy input unit 1012, avoid the overcurrent electric energy from causing great damage to the electronic components of the lamp tube driving circuit 10, facilitate the safety and reliability of the internal electric energy of the lamp tube driving circuit 10, and have a wide application range.

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

As an alternative implementation, fig. 8 shows another structural schematic of the lamp driving circuit 10 provided in this embodiment, and compared with the structural schematic of the lamp driving circuit 10 in fig. 1, the lamp driving circuit 10 in fig. 8 further includes: a clamping module 801 and an interference suppression module 802; the clamping module 801 is connected between the electric energy input module 101 and the frequency-selective absorption module 102; the clamping module 801 is used for voltage clamping of the first alternating current signal or the second alternating current 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 the electronic rectifier 30 and the commercial power 40 will generate large fluctuation and instability, and further cause the first AC signal or the second AC signal to exceed the safe voltage amplitude of the lamp driving circuit 10; in this embodiment, the clamping module 801 is used to absorb the fluctuation peak of the ac power, so as to prevent the high-voltage power output by the lamp driving circuit 10 from damaging the light emitting module 20; therefore, the clamping module 801 can enable the voltage of the first alternating current signal or the voltage of the second alternating current signal to be within a preset voltage range, and on the basis of ensuring the light source driving efficiency of the light emitting module 20, the safety and stability of the electronic components inside the lamp driving circuit 10 are ensured, and the lamp driving circuit 10 can supply power to the light emitting module 20 in real time in a CEG power supply mode or an AC power supply mode, so that the light source driving requirements of users are met.

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

The interference suppression module 802 plays an interference suppression role in the transmission process of the first alternating current signal or the second alternating current signal, so as to ensure the safety and high efficiency of electric energy transmission in the CEG power supply mode or the AC power supply mode, improve the transmission efficiency and the anti-interference performance of the internal signal of the lamp tube driving circuit 10, and prevent the alternating current signal from receiving the interference of noise in the transmission process, because the first alternating current signal or the second alternating current signal contains more stable electric energy; the light-emitting module 20 is reliably and efficiently powered through the lamp tube driving circuit 10, 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 optional implementation manner, fig. 9 shows a schematic circuit structure of the first power input unit 1011, the second power input unit 1012, the first overcurrent protection module 701, and the second overcurrent protection module 702 provided in this embodiment, please refer to fig. 9, where the first power input unit 1011 includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1 and a 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 all 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 all connected to form a positive-phase input end of the first power 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 all connected to form a negative-phase input end of the first power input unit 1011.

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

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

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

The positive phase input end of the second power input unit 1012 and the negative phase input end of the second power input unit 1012 are used for being connected to the electronic rectifier 30 or the commercial power 40, and the power transmitted through the second power input unit 1012 can ensure compatibility and applicability of both the CEG power supply mode and 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, wherein 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 commercial power 40 is connected to the first power input unit 1011 or the second power input unit 1012, if the electric energy output by the electronic rectifier 30 or the commercial power 40 exceeds the safety current range of the overcurrent fuse, the overcurrent fuse is disconnected to complete the overcurrent protection function; therefore, the lamp driving circuit 10 in this 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, fig. 10 shows a schematic circuit structure of the voltage regulation module 106 provided in this embodiment, please refer to fig. 10, in which the voltage regulation module 106 includes: a thirteenth resistor R13, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a first diode D1, a second diode D2, and a 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 connected in common to form a positive-phase output terminal of the regulator module 106, and the second end of the fifth capacitor C5 and the anode of the first diode D1 are connected in common to form a negative-phase output terminal of the regulator 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 to the light emitting module 20, and the positive phase output end of the voltage stabilizing module 106 is further connected to the rectifying and filtering module 103, so as to implement a real-time power-on function for the light emitting module 20.

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

The first end of the secondary winding of the first transformer T1 is connected to the voltage step-down module 105, and the second end of the secondary winding of the first transformer T1 is grounded to 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 dc power, so that the light emitting module 20 can maintain good power stability in both the CEG power supply mode and the AC power supply mode.

As an alternative implementation, fig. 11 shows a schematic circuit structure of the switching unit 1051, the voltage regulation control unit 1052 and the voltage reduction unit 1053 provided in this embodiment, please refer to fig. 11, in which the switching unit 1051 includes: the first switch tube M1 and the fourteenth resistor R14, the first end of the fourteenth resistor R14 is connected to the voltage-reducing unit 1053, the second end of the fourteenth resistor R14 is connected to 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 to the on-off control module 109, and the on-off is further realized by the first switch signal or the second switch signal output by the on-off control module 109.

As an alternative implementation, referring to fig. 11, the voltage regulation 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; wherein, 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 connected to the voltage-dropping 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 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 connected to the voltage-dropping unit 1053, the cathode of the third diode D3 is connected to the second end of the seventeenth resistor R17, the anode of the third diode D3 and the second end of the eighteenth resistor R18 are connected to the anode of the fifth diode D5, the cathode of the twelfth diode D5 6 is connected to the twelfth terminal 12 of the twelfth resistor C12, the second terminal of the twelfth capacitor C12 is connected to ground GND.

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

A power input pin VIN of the voltage regulating chip U1 is connected to the switch unit 1051 and the voltage-stabilizing control unit 1052, a voltage compensation pin COMP of the voltage regulating chip U1 is connected to a first end of a twentieth resistor R20, a second end of the twentieth resistor R20 is connected to a first end of a thirteenth capacitor C13, a voltage-stabilizing control pin VSEN of the voltage regulating chip U1 is connected to the voltage-stabilizing control unit 1052, a cathode of a sixth diode D6 and a first end of a twenty-first resistor R21 are commonly connected to a voltage output pin DRV of the voltage regulating chip U1, an anode of the sixth diode D6, a second end of the twenty-first resistor R21 and a first end of a twenty-second resistor R22 are commonly connected to a control end of the second switch tube M2, a first end of a first on-state resistor L1 of the second switch tube M2 is connected to a first end of the first inductor L1, a second end of the second switch tube M2 is connected to the second on-state terminal, a second end of the second switch tube M22, a second end of the twenty-state, The first end of the twenty-fourth resistor R24 and the first end of the twenty-fifth resistor R25 are connected to the voltage detection pin ISEN of the voltage regulation chip U1 in common, the second end of the twenty-third resistor R23 is connected to the ground GND, the second end of the twenty-fourth resistor R24 is connected to the ground GND, and the second end of the twenty-fifth resistor R25 is connected to the ground GND.

Illustratively, the model number of the voltage regulating chip U1 is: SY5839, therefore, this embodiment realizes the step-down function of the first power signal through the voltage regulation chip U1, has ensured AC power supply security and efficiency of the light emitting module 20.

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

A first end of the twenty-eighth resistor R28 and a first end of the twenty-ninth resistor R29 are commonly connected to the rectifying and filtering module 103, a second end of the twenty-ninth resistor R29 and a first end of the thirty-ninth resistor R30 are commonly connected to the control end of the fifth switching tube M5, a 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 for connecting to the rectifying and filtering module 103, a second end of the thirty-eighth resistor R30, the second end of the fifth switching tube M5, the second conducting end of the fifteenth capacitor C15, the seventh resistor R27 and the anode of the twenty-seventh diode R7, The second terminal of the fourteenth capacitor C14, the second terminal of the twenty-sixth resistor R26, the second conducting terminal of the fourth switching tube M4, and the first conducting terminal of the third switching tube M3 are commonly connected to the ground GND, and the second conducting terminal of the third switching tube M3 is connected to the light emitting module 20.

When the lamp driving circuit 10 is in the ECG power supply mode, the corresponding interference suppression function can be realized by combining the on or off states of the third switching tube M3, the fourth switching tube M4 and the fifth switching tube M5, 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, fig. 13 shows a schematic circuit structure of the on-off control module 109 provided in this embodiment, please refer to fig. 13, where the on-off control module 109 includes: the rectifier DB1, the sixteenth capacitor C16, the seventeenth capacitor C17, the eighteenth capacitor C18, the nineteenth capacitor C19, the thirty-first resistor R31, the thirty-second resistor R32, the thirty-third resistor R33, and the ninth diode D9.

The rectifier DB1 includes a plurality of diodes, and the rectifier DB1 rectifies the ac power to output dc power.

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

A first terminal of the nineteenth capacitor C19 and an anode of the ninth diode D9 are commonly connected to the first voltage output terminal of the rectifier DB1, and a second terminal of the nineteenth capacitor C19, a cathode of the ninth diode D9 and a 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-jamming 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-reducing module 105, and the second end of the thirty-third resistor R33 is grounded GND.

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

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

Fig. 15 shows a structural schematic diagram of the lamp 150 provided in the present embodiment, where the lamp 150 includes: a light emitting module 20 and the lamp driving circuit 10 as described above; the light emitting module 20 is connected to the lamp driving circuit 10, and the lamp driving circuit 10 is used for supplying power to the light emitting module 20; referring to the embodiments 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 flexibility and compatibility of power supply control 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 in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated 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 description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown 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 the 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, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in 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 illustrated 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 presuming that such combination is not an illogical or 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. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do 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 interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the 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 the disclosure.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A lamp driving circuit compatible with an electronic rectifier and a commercial power, comprising: the device comprises an electric energy input module, a frequency-selecting absorption module, a rectifying and filtering module, an anti-interference module and a voltage reduction module;

2. A lamp driving circuit according to 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. A lamp driving circuit according to claim 2, further comprising: the harmonic suppression module and the 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. A lamp driving circuit according to claim 1, further comprising: an 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;

5. The lamp driving circuit according to claim 4, wherein the voltage-reducing module comprises: the switch unit is connected with the on-off control module, the voltage stabilization control unit is connected with the rectification filtering module, and the voltage reduction unit is connected with the switch unit, the voltage stabilization control unit and the light-emitting module;

6. 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-selective absorption module, and the second electric energy input unit is connected with the frequency-selective absorption module;

7. A lamp driving circuit according to claim 6, 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;

8. A lamp driving circuit according to claim 1, further comprising: a clamping module; the clamping module is connected between the electric energy input module and the frequency-selective absorption module;

9. A lamp driving circuit according to claim 1, further comprising: an interference suppression module; the interference suppression module is connected between the electric energy input module and the frequency-selective absorption module;

10. A light fixture, comprising:

a light emitting module; and

a lamp driving circuit according to any one of claims 1-9; 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.