CN210986512U

CN210986512U - Light source driving circuit and lamp tube compatible with mains supply and powered by electronic ballast

Info

Publication number: CN210986512U
Application number: CN201921699470.6U
Authority: CN
Inventors: 黄绍丰; 罗杨洋; 杨林; 杨海涛
Original assignee: Longhorn Lighting Co ltd
Current assignee: Huizhou haoen intelligent Internet of things Co.,Ltd.
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-07-10
Anticipated expiration: 2029-10-11

Abstract

A light source driving circuit compatible with mains supply and electronic ballast power supply and a lamp tube compatible with mains supply and electronic ballast power supply, the light source driving circuit comprises: the power transmission module converts a power signal output by commercial power into a first alternating current signal; the electronic ballast performs self-inductance according to the first alternating current signal to output a first driving voltage; the switch control module detects whether the electronic ballast is connected or not; when the electronic ballast is not connected, the first alternating current signal is converted to supply power to the light-emitting module, and when the electronic ballast is connected, the first driving voltage is converted to supply power to the light-emitting module; the embodiment of the application can realize the compatibility and the applicability of a mains supply power supply mode and an electronic ballast power supply mode, can meet the light source driving requirements of different types of light-emitting modules, and has strong flexibility and compatibility; the light source driving circuit can be universally applied to different industrial places, and the cost of light source driving and the light source control steps are reduced.

Description

Light source driving circuit and lamp tube compatible with mains supply and powered by electronic ballast

Technical Field

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

Background

With the continuous development of science and technology, the lighting device has been commonly applied in people's life, the light source emitted by the lighting device can meet people's visual requirements, and great convenience is brought to people's production and life, people can use the lighting device in various external environments, the operation is simple and convenient, the price is low, for example, L ED (L lighting Diode) lamps are taken as examples, the light source emitted by L ED lamps can be universally applied to various occasions, the light source emitted by L ED lamps can be used for decoration, advertisement and the like, and in order to meet the lighting requirements of different users, technicians correspondingly design different types of lighting devices, each type of lighting device adopts a specific light source driving mode, and each type of lighting device has the best application place, so the different types of light source driving modes have great difference.

In the process of driving the light source of each type of lighting device in the conventional technology, technicians need to design a specific light source driving circuit for each type of lighting device, which results in complicated light source driving steps for the lighting device, and when the light source driving circuit is applied to another type of lighting device, the technicians must change an old power grid line to match the lighting device of the specific type, so that the light source driving cost is greatly increased; therefore, the light source driving circuit in the traditional technology cannot achieve compatible use, is low in flexibility, is difficult to match the light source driving requirements of different types of lighting devices, causes very high labor cost in the light source driving process, brings great inconvenience to users, and is low in practical value.

SUMMERY OF THE UTILITY MODEL

In view of this, embodiments of the present application provide a light source driving circuit compatible with a commercial power and an electronic ballast for supplying power and a lamp tube compatible with a commercial power and an electronic ballast for supplying power, which are intended to solve the problems of high cost of light source driving and complex control steps caused by the fact that the compatibility and flexibility of the light source driving circuit are low and the light source driving requirements of different types of lighting devices cannot be matched in the conventional technical scheme.

The first aspect of the embodiment of this application provides a light source drive circuit of compatible commercial power and electronic ballast power supply, is connected with the light emitting module, light source drive circuit includes:

the power transmission module is connected with commercial power and is configured to convert a power signal output by the commercial power into a first alternating current signal;

the electronic ballast is connected with the power transmission module and is configured to perform self-inductance according to the first alternating current signal so as to output a first driving voltage; and

the light-emitting module is connected and configured to detect whether the electronic ballast is connected; when the electronic ballast is not connected, the first alternating current signal is converted to supply power to the light-emitting module, and when the electronic ballast is connected, the first driving voltage is converted to supply power to the light-emitting module.

In one embodiment thereof, the switch control module comprises:

a rectifying unit connected to the power transmission module and configured to rectify the first alternating current signal into a first direct current signal;

the frequency-selecting driving unit is configured to perform frequency-selecting amplification on the first driving voltage according to a first control signal to obtain a first switching signal when the electronic ballast is switched in;

the first switching unit is connected with the frequency-selective driving unit, the rectifying unit and the light-emitting module, and is configured to be switched on or switched off according to the first switching signal, and adjust the amplitude of the first direct current signal so as to supply power to the light-emitting module; and

the switch selection unit is connected with the first switch unit, the rectification unit and the light-emitting module and is configured to adjust the amplitude of the first direct current signal according to a second control signal so as to supply power to the light-emitting module;

the switch selection unit is also used for carrying out leakage protection on the first switch unit.

In one embodiment, the switch selection unit includes:

a switching control unit connected to the first switching unit and the rectifying unit, configured to perform leakage protection on the first switching unit, and generate a second switching signal according to the second control signal; and

the switching component is connected with the rectifying unit, the switch control component and the light-emitting module, and is configured to be switched on or switched off according to the second switching signal, and adjust the amplitude of the first direct current signal so as to supply power to the light-emitting module;

the switch control component is also used for carrying out leakage protection on the switch component.

In one embodiment thereof, the switch control part comprises:

a switch control component connected to the switch component and configured to generate the second switch signal according to the second control signal; and

and a leakage protection module connected to the rectifying unit, the switching member, and the first switching unit, and configured to perform leakage protection on the switching member and the first switching unit.

In one embodiment, the earth leakage protection component comprises:

a first protection component connected with the switching component and the rectifying unit and configured to perform leakage protection on the switching component; and

and the second protection component is connected with the first switch unit and the rectifying unit and is configured to perform leakage protection on the first switch unit.

In one embodiment thereof, the first protection assembly comprises:

the leakage protection circuit comprises a leakage protection chip, a first resistor, a second resistor, a first diode and a second diode;

the anode of the first diode is connected with the positive phase input end of the rectifying unit, the anode of the second diode is connected with the negative phase input end of the rectifying unit, the cathode of the first diode and the cathode of the second diode are connected with the first end of the first resistor in common, the second end of the first resistor is connected with the voltage detection pin of the leakage protection chip, the voltage feedback pin of the leakage protection chip is connected with the first end of the second resistor, and the second end of the second resistor is connected with a digital ground;

and the pin of the electric leakage protection tube of the electric leakage protection chip is connected with the switch component.

In one embodiment thereof, the switch control part comprises:

the first control chip, the third diode, the fourth diode, the third resistor, the fourth resistor and the first capacitor;

the anode of the third diode is connected with the positive phase input end of the rectifying unit, the anode of the fourth diode is connected with the negative phase input end of the rectifying unit, the cathode of the third diode and the cathode of the fourth diode are connected to the first end of the third resistor in common, the second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor are connected to the voltage output pin of the first control chip in common, and the second end of the fourth resistor and the second end of the first capacitor are connected to digital ground in common;

the first leakage protection tube of the first control chip is connected with the switch component through a pin;

the second electric leakage protection tube of the first control chip is connected with the first switch unit through a pin;

and a voltage feedback pin of the first control chip is connected with the switch component.

In one embodiment, the frequency-selective driving unit includes:

the first inductor, the second capacitor, the third capacitor, the fifth diode, the sixth diode and the fifth resistor;

the first end of the first inductor is used for being connected to the electronic ballast, the second end of the first inductor is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the anode of the fifth diode, and the cathode of the fifth diode, the first end of the third capacitor, the first end of the fifth resistor and the cathode of the sixth diode are connected to the first switch unit in common;

the second end of the third capacitor, the second end of the fifth resistor and the anode of the sixth diode are connected to a digital ground in common.

In one embodiment thereof, the switching part comprises: the first switch tube and the switch resistor;

the control end of the first switch tube is connected with the switch control component, the first conduction end of the first switch tube is connected with the rectifying unit, the second conduction end of the first switch tube is connected with the first end of the switch resistor, and the second end of the switch resistor is connected with digital ground.

A second aspect of the embodiments of the present application provides a lamp tube compatible with a mains supply and supplied by an electronic ballast, including:

a light emitting module; and

the light source driving circuit is connected with the light emitting module, and is used for supplying power to the light emitting module.

After the electric energy output by the mains supply is converted, the light source driving circuit compatible with the mains supply and the power supply of the electronic ballast can realize a mains supply (TYPE B) mode and an electronic ballast power supply (TYPE A) mode of the light-emitting module, can realize the functions of compatibility and safe power-on of the light-emitting module, and ensures the working stability and safety of the light-emitting module; the light source driving circuit has high light source driving compatibility and flexibility, and carries out TYPE A power supply or TYPE B power supply on the light-emitting module in a self-adaptive manner according to the light source driving requirement of the light-emitting module, thereby meeting the power supply control requirement of the light-emitting module and having extremely simple and convenient operation; furthermore, the light source driving circuit in the embodiment of the application can be suitable for different types of light emitting modules, the internal circuit structure and the wiring structure of the light source driving circuit are not required to be changed, the light source driving cost of the light emitting modules is reduced, and great convenience is brought to users.

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 tube compatible with a commercial power and a power supplied by an electronic ballast according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a light source driving circuit compatible with a commercial power and a power supplied by an electronic ballast according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a switch control module according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a switch selection unit according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a switch control component according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a leakage protection device according to an embodiment of the present disclosure;

fig. 7 is a schematic circuit diagram of a first protection device according to an embodiment of the present disclosure;

fig. 8 is a schematic circuit diagram of a second protection device according to an embodiment of the present disclosure;

fig. 9 is a schematic circuit diagram of a switch control unit according to an embodiment of the present disclosure;

fig. 10 is a schematic circuit structure diagram of a frequency-selective driving unit according to an embodiment of the present application;

fig. 11 is a schematic circuit structure diagram of a rectifying unit, a switching component, and a first switching unit according to an embodiment of the present disclosure.

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 the TYPE a power supply mode needs to adopt an electronic ballast loop to realize electric energy transmission and control, the TYPE B power supply mode directly adopts commercial power to realize the electric energy transmission mode, the TYPE a power supply mode and the TYPE B power supply mode have respective electric energy conversion characteristics, and can be respectively applicable to different TYPEs of lamp tubes, wherein the TYPE a lamp tube adopts the TYPE a power supply mode, and the TYPE B lamp tube adopts the TYPE B power supply mode; because the difference between the TYPE a power supply mode and the TYPE B power supply mode is large, if the two power supply modes are mixed for use, for example, the TYPE a lamp tube adopts the TYPE B power supply mode, or the TYPE B lamp tube adopts the TYPE a power supply mode, the physical safety of the lamp tube is greatly damaged, and the lamp tube is completely burnt in severe cases; because the lamp tube is used as a packaging structure, a user sometimes has difficulty in judging whether the lamp tube belongs to a TYPE A lamp tube or a TYPE B lamp tube in the using process, so that the lamp tube is extremely easy to be damaged by electric energy driving in the using process, and the practical value of the lamp tube is reduced; based on this problem, light source drive circuit in the embodiment of this application can realize TYPE A power supply mode and TYPE B power supply mode compatible suitable for each other, has ensured fluorescent tube driven security and compatibility, has brought very big convenience for user's use.

Fig. 1 shows a structural schematic diagram of a lamp 10 compatible with commercial power and supplied by an electronic ballast, where the lamp 10 is taken as an application framework as a whole, and the lamp 10 includes a light emitting module 101 and a light source driving circuit 102 compatible with commercial power and supplied by an electronic ballast, where the light source driving circuit 102 is connected to the light emitting module 101, and the light source driving circuit 102 is used to supply power to the light emitting module 101; when the light-emitting module 101 is successfully powered on, the light-emitting module 101 can emit a light source with preset brightness and preset color, so that good visual experience is brought to a user, and the lamp tube 10 has high flexibility and application range; optionally, the light emitting module 101 includes at least one lamp bead, and the lamp bead may be a white light lamp bead, a red light lamp bead, a blue light lamp bead, or a green light lamp bead.

The light source driving circuit 102 is connected with a mains supply, and after the light source driving circuit 102 converts the power supply electric energy output by the mains supply, TYPE A power supply or TYPE B power supply can be performed on the light-emitting module 101, so that the power supply safety and high efficiency of the light-emitting module 101 are guaranteed, and the light source driving safety and stability of the light-emitting module 101 are greatly guaranteed; therefore, the light source driving circuit 102 can realize a high-precision and compatible power supply function for the light emitting module 101, improve the light emitting safety and the high efficiency of the lamp 10, meet the light source driving requirements of users, and bring great convenience to the users.

Optionally, the lamp 10 is a TYPE a lamp or a TYPE B lamp; the light source driving circuit 102 can be compatible with a TYPE a lamp or a TYPE B lamp, and adaptively matches a TYPE a power supply mode and a TYPE B power supply mode; then the user need not to distinguish whether the lamp 10 belongs to a TYPE a lamp or a TYPE B lamp, and then the lamp 10 can be universally applied to various different industrial places to satisfy the user's light source lighting requirements, avoid the problem that the lamp appears physical damage due to power supply mode TYPE errors.

Referring to fig. 2, according to the structural schematic diagram of the light source driving circuit 102 compatible with the commercial power and the power supplied by the electronic ballast provided in the embodiment of the present application, the light source driving circuit 102 is connected to the light emitting module 101, and the light source driving circuit 102 can adaptively implement a TYPE a power supply mode or a TYPE B power supply mode, so that the compatibility and flexibility of the power supply mode are high, the light source driving cost of the light emitting module 101 is greatly reduced, and great convenience is brought to the use of a user; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:

the light source driving circuit 102 includes: a power delivery module 201, an electronic ballast 202, and a switch control module 203.

The power transmission module 201 is connected to the utility power 30, and is configured to convert a power signal output by the utility power 30 into a first alternating current signal.

The commercial power 30 has a stable electric energy output function, and further, the commercial power 30 can provide electric energy for the light-emitting module 101 to ensure the power supply safety and reliability of the light-emitting module 101, and the light source driving circuit 102 can be applied to various different industrial environments to realize the conversion and energy supply of the electric energy; therefore, the power transmission module 201 has a high electric energy compatible input and output function, and the conversion efficiency, the conversion precision and the conversion efficiency of the electric energy are guaranteed; the first alternating current signal output by the power transmission module 201 has more stable alternating current electric energy, so that the light source driving efficiency is improved, and the flexibility is higher; for example, the power transmission module 201 can adjust the amplitude of the power signal, so that the amplitude of the first ac signal can be in a safe and stable range, the inside of the light source driving circuit 102 has higher electric energy conversion accuracy and safety, and the application range of the light source driving circuit 102 is wider.

The electronic ballast 202 is connected to the power transmission module 201 and configured to perform self-inductance according to the first ac signal to output a first driving voltage.

When the power transmission module 201 outputs the first alternating current signal to the electronic ballast 202, the electronic ballast 202 has a function of current limiting and high voltage generation for the first alternating current signal to realize electric energy conversion, so that the electronic ballast 202 can be applied to a TYPE a power supply mode, and the accuracy and stability of the TYPE a power supply mode are ensured; since the ac power accessed by the electronic ballast 202 will generate adaptive change, the regularly changed power will induce the fluctuation of the surrounding magnetic field, and further induce the change of the magnetic flux, the electronic ballast 202 will generate a larger self-induced electromotive force, and convert the first ac signal to obtain a first driving voltage with a specific amplitude; the first driving voltage has a higher driving function of the electronic component, and the light source driving circuit 10 has higher electric energy conversion efficiency and compatibility, and has higher practical value.

The switch control module 203 is connected with the light emitting module 101 and configured to detect whether the electronic ballast 202 is connected; when the electronic ballast 202 is not connected, the first ac signal is converted to supply power to the light emitting module 101, and when the electronic ballast 202 is connected, the first driving voltage is converted to supply power to the light emitting module 101.

The switch control module 203 has a light source driving function, illustratively, the switch control module 203 can perform a constant voltage control function or a constant current control function on the light emitting module 101, so that the light emitting module 101 can be connected with stable electric energy and maintain a safe light emitting state, a compatible use function of a TYPE A power supply mode and a TYPE B power supply mode is realized, the light emitting module 101 has high light source driving efficiency and precision, and the practical value is high; specifically, the switch control module 203 is connected to the power transmission module 201, and the switch control module 203 can be compatibly connected to the electronic ballast 202, so as to realize switching between a TYPE B power supply mode and a TYPE a power supply mode, thereby ensuring the light source driving efficiency and flexibility of the light emitting module 20; for example, when the switch control module 203 is not electrically connected to the electronic ballast 202, the switch control module 203 can perform electric energy conversion on the first ac electrical signal, and directly take power from the utility power 30 and perform electric energy conversion, so as to achieve the stability of the TYPE B power supply mode and improve the power supply efficiency of the light emitting module 20; when the switch control module 203 is electrically connected with the electronic ballast 202, the electric energy output by the electronic ballast 202 is converted through the switch control module 203 to achieve a TYPE A power supply function, and the first driving voltage is converted through the switch control module 203, so that the light-emitting module 101 is powered on according to the rated power, and the power-on safety of the light-emitting module 101 is guaranteed; therefore, the switching function between the TYPE a power supply mode and the TYPE B power supply mode is realized by the switch control module 203 according to the source of the power source, and then the electric energy is adaptively converted by the switch control module 203 to realize the power-on function of the light-emitting module 20, so that the switch control module 203 converts the electric energy according to the power supply requirement of the light-emitting module 101, and the adaptive power supply function of the light-emitting module 101 is realized.

In the circuit structure of the light source driving circuit 102 shown in fig. 2, the light source driving circuit 10 can perform adaptive conversion on the electric energy output by the commercial power 30, and when the switch control module 203 is compatibly connected to corresponding electric energy, the electric energy is converted and output by the switch control module 203 to realize compatible use functions of a TYPE a power supply mode and a TYPE B power supply mode, the adaptive power supply function is realized for the light emitting module 101, stable electric energy is connected to the inside of the light emitting module 101, and the physical safety and compatibility of the light emitting module 101 are improved; therefore, the light source driving circuit 102 in this embodiment has a relatively simplified circuit module structure, and can be switched between a TYPE a power supply mode and a TYPE B power supply mode, and the light source driving circuit 102 can be applied to various TYPEs of light-emitting modules 101, so as to realize a high-efficiency and safe driving function for the light-emitting modules 101, and has relatively high flexibility; therefore, the light source driving circuit 102 can realize the specific power supply function of the light emitting module 101 without changing the internal circuit structure, the light source driving circuit 102 converts the electric energy output by the mains supply 30 according to the power supply requirement of the light emitting module 101 so as to realize TYPE A power supply or TYPE B power supply, the light source driving cost and complexity of the light emitting module 101 are greatly reduced, the light emitting module 101 can be adaptively connected with stable electric energy, the light emitting module is suitable for different industrial occasions in a universal manner, the light source driving requirement of a user is met, and the practical value is high; therefore, the problems that a light source driving circuit in the traditional technology cannot be compatible with different types of light source driving modes, is low in flexibility and safety, cannot be matched with light source driving requirements of different types of lighting devices, and causes the lighting devices to have high light source driving cost and complex control steps and great inconvenience for users are solved.

As an alternative implementation, fig. 3 shows a schematic structure of the switch control module 203 provided in this embodiment, please refer to fig. 3, where the switch control module 203 includes: a rectifying unit 2031, a frequency-selective driving unit 2032, a first switching unit 2033, and a switch selecting unit 2034; the rectifying unit 2031 is connected to the power transmission module 201 and configured to rectify the first ac signal into a first dc signal.

The rectifying unit 2031 has a rectifying function to convert ac to dc, and the first dc signal rectified by the rectifying unit 2031 contains stable dc power, so that the lighting module 20 can be supplied with more stable power by the dc power, thereby ensuring the accuracy and efficiency of internal power conversion of the switch control module 102; when the power transmission module 201 outputs the ac power to the rectification unit 2031, the rectification unit 201 can rapidly implement the rectification function to ensure the efficiency and accuracy of the power conversion, thereby implementing the high-efficiency light source driving function of the light emitting module 20.

The frequency-selective driving unit 2032 is configured to perform frequency-selective amplification on the first driving voltage according to the first control signal to obtain a first switching signal when the electronic ballast 202 is switched on.

When the electronic ballast 202 is connected to the frequency-selective driving unit 2032, the frequency-selective driving unit 2032 can supply power to TYPE a of the light-emitting module 101, and the frequency-selective driving unit 2032 can realize a faster power transmission function; the electronic ballast 202 outputs a first driving voltage, the first driving voltage has a specific frequency variation, and the frequency-selective driving unit 2032 can perform frequency-selective processing on the first driving voltage within a preset frequency range to ensure the accuracy and stability of the first driving voltage in the transmission process; and then obtain first switching signal after frequency-selective amplification and have higher precision and high efficiency, can realize corresponding on-off control function to electronic components through first switching signal, on-off control module 203's inside has higher on-off control accuracy nature and efficiency to realize the accurate control function of electric energy under the TYPE A power supply mode, control response speed is very fast.

The first switch unit 2033 is connected to the frequency-selective driving unit 2032, the rectifying unit 2031, and the light emitting module 101, and is configured to be turned on or off according to the first switch signal to adjust the amplitude of the first direct current signal, so as to supply power to the light emitting module 101.

The first switching unit 2033 has a turn-on or turn-off function, thereby realizing a real-time conversion function for the direct current electric energy; for example, since the first switching signal has different level states, the first switching unit 2033 can be turned on or off by the level change state of the first switching signal, so as to implement the function of precisely adjusting the amplitude of the dc power; after the direct current electric energy is flexibly adjusted through the first switch unit 2033, the light-emitting module 101 can be powered on with rated power, so that the power-on safety and stability of the light-emitting module 101 are guaranteed, the TYPE A power supply function of the light-emitting module 101 is realized, the power supply compatibility and the physical safety of the light-emitting module 20 are guaranteed, and the practical value is high.

The switch selecting unit 2034 is connected to the first switch unit 2033, the rectifying unit 2031, and the light emitting module 101, and is configured to adjust the amplitude of the first direct current signal according to the second control signal to supply power to the light emitting module 101.

The switch selection unit 2034 has a function of adjusting the amplitude of the direct current energy, so as to realize a TYPE B power supply mode, and simplify the power-on control step of the light-emitting module 101; when the electronic ballast 202 is not physically connected to the frequency-selective driving unit 2032, the switch selecting unit 2034 can perform a dc power conversion function by the second control signal, so that the power conversion accuracy and flexibility are high; therefore, the switch selection unit 2034 realizes a stable constant current driving or constant voltage driving function for the light emitting module 101, which brings great convenience to the user; according to the second control signal, the TYPE B power supply function of the light emitting module 101 can be realized, and the electric energy conversion state of the switch selecting unit 2034 has better adjustability and flexibility.

Illustratively, the first control signal and the second control signal are both generated by the signal output module, and when the switch control module 203 is connected to the electronic ballast 202 or is not connected to the electronic ballast 202, the switch control module 203 is driven by the first control signal or the second control signal to realize a corresponding light source driving function, so as to realize flexible switching between a TYPE a power supply mode and a TYPE B power supply mode, and ensure adaptive light source driving efficiency and accuracy of the light source driving circuit 10.

The switch selection unit 2034 is also used for leakage protection of the first switch unit 2033.

In the process of controlling the on or off of the first switch unit 2033 by the first switch signal, the first switch unit 2033 can realize an electric energy conversion function, and the first switch unit 2033 has an electric leakage fault in the electric energy conversion process, and the electric leakage fault not only causes interference on the safety of electronic components, but also causes electric shock risk of a human body, and generates an electric power safety accident; this embodiment can in time realize earth leakage protection function to first switch element 2033 through switch selection unit 2034, has ensured first switch element 2033's electric energy security more comprehensively, and the TYPE A power supply mode of light-emitting module 101 has higher security and reliability, and application scope is wider, has avoided the human body to suffer great electric shock risk.

As an alternative implementation, fig. 4 shows a schematic structure of the switch selecting unit 2034 provided in this embodiment, and referring to fig. 4, the switch selecting unit 2034 includes: a switch control section 401 and a switch section 402; the switching control means 401 is connected to the first switching unit 2033 and the rectifying unit 2031, and is configured to perform leakage protection on the first switching unit 2033 and generate a second switching signal according to a second control signal.

Among them, the switch control part 401 has the functions of leakage protection and signal conversion, and the leakage fault of the first switch unit 2033 can be protected in time by the switch control part 401, so that the first switch unit 2033 has the safety and stability of operation; switch control unit 401 has higher electric energy conversion rate and accuracy, and switch control unit 401 can compatible control information in the discernment second control signal to realize signal conversion function, the second switch signal through switch control unit 401 output can realize switch control function, has improved the security and the high efficiency of the TYPE B power supply mode of light-emitting module 101, has promoted light source control efficiency of light-emitting module 101.

The switching part 402 is connected to the rectifying unit 2031, the switching control part 401, and the light emitting module 101, and is configured to be turned on or off according to the second switching signal to adjust the amplitude of the first direct current signal so as to supply power to the light emitting module 101.

Illustratively, the second switching signal output by the switching control component 401 has a corresponding high level state or low level state, and by changing the level state of the second switching signal, the switching component 402 can have a specific on time and a specific off time, and the switching component 402 implements a constant current driving or constant current driving function on the light emitting module 101, thereby greatly ensuring the power supply safety and high efficiency of the light emitting module 101; therefore, after the amplitude of the direct current electric energy is sensitively adjusted, the switch component 402 can realize a higher light source driving function for the light-emitting module 101, the flexibility and the high efficiency of the TYPE B power supply mode are improved, and a light source emitted by the light-emitting module 101 can completely meet the actual visual requirements of users.

The switch control section 401 is also used to perform earth leakage protection on the switch section 402.

In this embodiment, the switch control component 401 and the switch component 402 can perform accurate conversion on the electric energy, so as to ensure the safety and the accuracy of the light-emitting module 101 in the TYPE B power supply process; and switch unit 402 switches on or switches off to realize the in-process of amplitude adjustment, certain electric leakage trouble that switch unit 402 can appear, therefore this embodiment can maintain switch unit 402's electric energy security and electronic components stability through switch control unit 401, has improved the security and the high efficiency of the TYPE B power supply of light-emitting module 101.

In this embodiment, the switch control part 401 may perform leakage protection on the first switch unit 2033 and the switch part 402, respectively, so as to realize a safer light source driving function for the light emitting module 101.

As an alternative implementation, fig. 5 shows a schematic structure of the switch control unit 401 provided in this embodiment, and referring to fig. 5, the switch control unit 401 includes: a switch control component 4011 and a leakage protection component 4012. Wherein the switch control component 4011 is connected to the switch component 402 and configured to generate a second switch signal according to the second control signal.

Wherein switch control subassembly 4011 can realize signal conversion and output function, can drive switch control subassembly 4011 through the second control signal and realize signal conversion function, and the second switch signal has electronic components's the control function that switches on and turn off, and switch control subassembly 4011 has higher signal conversion precision and signal conversion efficiency, has realized the high-efficient TYPE B power supply function of light-emitting module 101, and application scope is extremely wide.

The leakage protection component 4012 is connected to the rectifying unit 2031, the switching member 402, and the first switching unit 2033, and is configured to perform leakage protection on the switching member 402 and the first switching unit 2033.

Wherein earth leakage protection subassembly 4012 can maintain the security and the high efficiency of light-emitting module 101 power supply in-process electronic components, can realize sensitive earth leakage protection function through earth leakage protection subassembly 4012, avoid switch block 402 and first switch unit 2033 to suffer the electric leakage trouble, can realize high-efficient, safe TYPE A power supply mode or TYPE B power supply mode to light-emitting module 101 through switch control module 203, the power supply security demand of light-emitting module 101 has been satisfied.

As an alternative implementation, fig. 6 shows a schematic structure of the leakage protection component 4012 provided in this embodiment, referring to fig. 6, the leakage protection component 4012 includes: a first protection component 601 and a second protection component 602, wherein the first protection component 601 is connected to the switch component 402 and the rectifying unit 2031, and is configured to perform leakage protection on the switch component 402.

The second protection component 602 is connected to the first switching unit 2033 and the rectifying unit 2031, and is configured to perform leakage protection on the first switching unit 2033.

In this embodiment, the first protection component 601 and the second protection component 602 respectively implement the leakage protection function, so that during the power supply process of the light-emitting module 101, the electronic components can maintain higher safety and stability, which is beneficial to the personal safety and high efficiency of the light-emitting module 101 during the power supply control process, and brings better use experience to users, and the practical value is higher; further, the switching part 402 and the first switching unit 2033 can realize a more safe and stable power conversion function; when the in-process of supplying power is being carried out to light emitting module 101, combine first protection component 601 and second protection component 602 can carry out earth leakage protection to the electronic components in light source drive circuit 10, TYPE a power supply security and TYPE B power supply security of light emitting module 20 are higher.

As an alternative implementation, fig. 7 shows a schematic circuit structure of the first protection component 601 provided in this embodiment, please refer to fig. 7, in which the first protection component 601 includes: the leakage protection device comprises a leakage protection chip U1, a first resistor R1, a second resistor R2, a first diode D1 and a second diode D1.

Wherein, the anode of the first diode D1 is connected to the positive phase input terminal of the rectifying unit 2031, and the anode of the second diode D2 is connected to the negative phase input terminal of the rectifying unit 2031; the rectifying unit 2031 is connected to the first ac signal through the positive phase input terminal and the negative phase input terminal; the cathode of the first diode D1 and the cathode of the second diode D2 are commonly connected to a first end of a first resistor R1, a second end of the first resistor R1 is connected to a voltage detection pin HV of the leakage protection chip U1, a voltage feedback pin CS of the leakage protection chip U1 is connected to a first end of a second resistor R2, and a second end of the second resistor R2 is connected to digital AGND.

The leakage protection chip U1 can realize the power supply stability and safety of itself through the voltage feedback pin CS, so that the leakage protection chip U1 can be in a safe and stable operation state for a long time.

The leakage protection pin Drain of the leakage protection chip U1 is connected to the switch component 402.

The leakage protection pin Drain of the leakage protection chip U1 can accurately detect the leakage fault of the switch component 402, ensure the physical safety and reliability of the switch component 402, and improve the power conversion safety and TYPE B power supply stability of the switch component 402.

As an alternative implementation, fig. 8 shows a schematic circuit structure of the second protection component 602 provided in this embodiment, please refer to fig. 8, where the second protection component 602 includes: the leakage protection device comprises a leakage protection chip U2, a sixth resistor R6, a seventh resistor R7, a seventh diode D7 and an eighth diode D8.

An anode of the seventh diode D7 is connected to the positive-phase input terminal of the rectifying unit 2031, an anode of the eighth diode D8 is connected to the negative-phase input terminal of the rectifying unit 2031, a cathode of the seventh diode D7 and a cathode of the eighth diode D8 are commonly connected to a first end of the sixth resistor R6, a second end of the sixth resistor R6 is connected to the voltage detection pin HV of the leakage protection chip U2, the voltage feedback pin CS of the leakage protection chip U2 is connected to a first end of the seventh resistor R7, and a second end of the seventh resistor R7 is connected to the digital AGND.

The leakage protection pin Drain of the leakage protection chip U2 is connected to the first switch unit 2033.

As an alternative implementation, fig. 9 shows a schematic circuit structure of the switch control unit 401 provided in this embodiment, and referring to fig. 9, the switch control unit 401 includes: the first control chip U3, a third diode D3, a fourth diode D4, a third resistor R3, a fourth resistor R4 and a first capacitor C1;

an anode of the third diode D3 is connected to the positive input terminal of the rectifying unit 2031, an anode of the fourth diode D4 is connected to the negative input terminal of the rectifying unit 2031, a cathode of the third diode D3 and a cathode of the fourth diode D4 are commonly connected to a first end of a third resistor R3, a second end of the third resistor R3, a first end of a fourth resistor R4 and a first end of a first capacitor C1 are commonly connected to a voltage output pin VB of the first control chip U3, and a second end of the fourth resistor R4 and a second end of the first capacitor C1 are commonly connected to the digital AGND.

The first leakage protection pin DRV1 of the first control chip U3 is connected to the switch component 402.

The second leakage protection pin DRV2 of the first control chip U3 is connected to the first switch unit 2033.

The voltage feedback pin CS of the first control chip U3 is connected to the switching component 402.

The first control chip U3 can not only perform on-off control on the switch component 402 to perform TYPE B power supply on the light emitting module 101, but also perform safe power supply control on the switch component 402 and the first switch unit 2033 by the first control chip U3 to prevent leakage fault; when the light source driving circuit 10 is applied to different industrial places, the leakage protection function and the on-off control function can be integrated within the first control chip U3, so as to simplify peripheral circuit elements, reduce the volume of the circuit, reduce the cost of light source driving, and have a wider application range.

As an alternative implementation, fig. 10 shows a schematic circuit structure of the frequency-selective driving unit 2032 provided in this embodiment, please refer to fig. 10, in which the frequency-selective driving unit 2032 includes a first inductor L1, a second capacitor C2, a third capacitor C3, a fifth diode D5, a sixth diode D6, and a fifth resistor R5.

The first end of the first inductor L1 is used to connect the electronic ballast 202, and the electronic ballast 202 can output the first driving voltage to the first end of the first inductor L1 to drive the frequency-selective driving unit 2032 to implement the function of frequency-selective processing, the second end of the first inductor L1 is connected to the first end of the second capacitor C2, the second end of the second capacitor C2 is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5, the first end of the third capacitor C3, the first end of the fifth resistor R5, and the cathode of the sixth diode D6 are connected to the first switching unit 2033.

The second terminal of the third capacitor C3, the second terminal of the fifth resistor R5, and the anode of the sixth diode D6 are commonly connected to the digital AGND.

It should be noted that the circuit structure shown in fig. 10 is only a schematic circuit structure of the frequency-selective driving unit 2032, where the positions of the resistors, capacitors, and inductors shown in fig. 10 represent connection nodes and connection relationships thereof, but the number of components and the new serial-parallel manner derived from the equivalent circuit are not limited, for example, in fig. 10, the first end of the first inductor L1 is connected to the electronic ballast 202 through a current-limiting resistor, and at least one current-limiting resistor may be connected in series, or at least one current-limiting resistor may be connected in parallel, or at least one current-limiting resistor may be connected in series and connected in parallel to be implemented equivalently, so that the frequency-selective driving unit 2032 has a more compatible circuit structure, and the signal transmission efficiency between the frequency-selective driving unit 2032 and the electronic ballast 202 is higher.

As an alternative implementation, fig. 11 shows a circuit configuration schematic of the rectifying unit 2031, the switching component 402 and the first switching unit 2033 provided in this embodiment, please refer to fig. 11, in which the rectifying unit 2031 includes a rectifying bridge formed by connecting 4 diodes to realize a function of converting ac to dc, a fourth capacitor C4, a fifth capacitor C5, a ninth diode D9 and a second inductor L2, a positive phase input terminal of the rectifying bridge and a negative phase input terminal of the rectifying bridge are connected to the power transmission module 201, an electric energy output terminal of the rectifying bridge, a first terminal of the fourth capacitor C4, a cathode of the ninth diode D9 and a first terminal of the fifth capacitor C5 are connected to the light emitting module 101 in common, a second terminal of the fourth capacitor C4 is connected to the digital AGND, an anode of the ninth diode D9 and a first terminal of the second inductor 203L 2 are connected to the switching component 402 in common, and a second terminal of the second diode L2 and a second terminal of the fifth capacitor C5 are connected to the first switching unit 101 and the light emitting module 101 in common.

Optionally, the switch part 402 includes: a first switch tube M1 and a switch resistor R8; a first conducting terminal of the first switch tube M1 is connected to the rectifying unit 2031, a control terminal of the first switch tube M1 is connected to the switch control part 401, a second conducting terminal of the first switch tube M1 is connected to a first terminal of the switch resistor R8, and a second terminal of the switch resistor R8 is connected to digital AGND; in this embodiment, the first switch tube M1 is connected to the light emitting module 101 through the rectifying unit 2031, and then the first switch tube M1 is controlled to be turned on or off through the second switch signal, so as to change the electric energy transmission process of the rectifying unit 2031, and achieve the TYPE B power supply function for the light emitting module 101; and the switch control part 401 can ensure the electric energy safety of the first switching tube M1, prevent electric leakage fault, and improve the power supply control efficiency and safety of the light emitting module 101.

Optionally, the first switching tube M1 is a triode or a MOS tube.

Optionally, the first switch unit 2033 includes a second switch tube M2, the first conduction end of the second switch tube M2 is connected to the rectification unit 2031 and the light emitting module 101, and the control end of the second switch tube M2 is connected to the frequency-selective driving unit 2032 and the switch control component 401, on one hand, the second switch tube M2 can be controlled to be connected or disconnected by the first switch signal, so as to adjust the power transmission process of the rectification unit 2031, and implement TYPE a power supply function for the light emitting module 101; on the other hand, the switching control unit 401 can perform leakage protection for the second switching tube M2, thereby ensuring the power supply efficiency and reliability of the light emitting module 101.

To better illustrate the power supply control function of the light source driving circuit 10 for the light emitting module 101 in this embodiment, a compatible use process of the TYPE a power supply mode and the TYPE B power supply mode is described below with reference to fig. 10 by a specific embodiment; the method comprises the following specific steps:

the power transmission module 201 outputs the ac power to the rectifier bridge to provide power to the light emitting module 101; the light-emitting module 101 is set to adopt a TYPE A power supply mode in a matching manner, the light-emitting module 101 is connected to the electronic ballast 202 through the frequency-selecting driving unit 2032, when the light-emitting module 101 is connected to an output loop of the electronic ballast 202, the frequency-selecting driving unit 2032 outputs a high level, the second switching tube M2 is conducted, electric energy is converted from alternating current to direct current through a rectifier bridge, and the rectified electric energy is filtered through the fourth capacitor C4 and the fifth capacitor C5, so that the rectified and output direct current electric energy becomes smoother, and the direct current electric energy can be output to the light-emitting module 101 through the rectifier unit 2031; since the second switch M2 is already turned on, the current goes back to the second switch M2 and finally to digital AGND to form a complete loop and continue to operate, and the light source driving circuit 10 is in TYPE a power mode; in the TYPE a power supply mode, the first conduction terminal and the second conduction terminal of the second switch tube M2 only maintain a very low conduction voltage drop. In this case, the switch element 402 is substantially bypassed, and the first switch M1 is closed and inactive;

therefore, the light source driving circuit 10 in this embodiment can integrate a TYPE a power supply mode and a TYPE B power supply mode, wherein one power transmission module 201 and one light emitting module 101 are shared, so that the current path from the rectification to the output filtering to the light emitting module 101 is the same, compared with the TYPE a power supply mode, the TYPE B power supply mode has the difference that the frequency-selective driving unit 2032 outputs a low level, the second switch tube M2 is in an off state, the current is transmitted from the second inductor L2 to the switch component 402, and finally returns to the ground, in this process, the switch control component 401 switches the on-off state of the first switch tube M1 to provide a proper working voltage and working current for the light emitting module 101, and the switch control component 401 performs leakage protection on the first switch tube M1 to prevent the human body from being touched, obviously, in the TYPE B power supply mode, the second switch tube M2 is turned off, and the first switch tube M1 is turned on.

As an alternative embodiment, the commercial power 30 is 220V ac power; and then light source drive circuit 10 has higher compatibility, but the universal daily life electric power system that is applicable to through carrying out the conversion of high accuracy to the electric energy of commercial power 30 output, realizes the compatible use between TYPE A power supply and TYPE B power supply to light-emitting module 101, has improved light-emitting module 20's electric energy security and practical value.

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. The utility model provides a compatible commercial power and electronic ballast power supply's light source drive circuit, is connected with luminous module, its characterized in that, light source drive circuit includes:

2. The light source driving circuit according to claim 1, wherein the switch control module comprises:

3. The light source driving circuit according to claim 2, wherein the switch selecting unit includes:

4. The light source driving circuit according to claim 3, wherein the switch control section comprises:

5. The light source driving circuit according to claim 4, wherein the leakage protection component comprises:

6. The light source driving circuit according to claim 5, wherein the first protection component comprises:

7. The light source driving circuit according to claim 3, wherein the switch control section comprises:

8. The light source driving circuit according to claim 2, wherein the frequency-selective driving unit comprises:

9. The light source driving circuit according to claim 3, wherein the switching means comprises: the first switch tube and the switch resistor;

10. A lamp tube compatible with commercial power and power supplied by an electronic ballast, comprising:

a light emitting module; and

the light source driving circuit according to any one of claims 1 to 9, wherein the light source driving circuit is connected to the light emitting module, and the light source driving circuit is configured to supply power to the light emitting module.