Driving circuit and electronic atomizer

Abstract

The utility model provides a driving circuit and an electronic atomizer, and belongs to the technical field of driving control. According to the driving circuit, the first input end of an oscillation module is used for inputting working voltage, the first output end and the second output end of the oscillation module are connected with the first input end and the second input end of a boosting module respectively, and the second input end of the oscillation module is connected with a micro-control unit; the first output end of the boosting module is connected with the input end of the display control module, and the second output end of the boosting module is grounded; the first output end of the boosting module is connected with the input end of the display control module, and the second output end of the boosting module is grounded; the boosting module comprises a transformer; the control end of the display control module is connected with the micro-control unit. According to the invention, the effect of improving the driving capability of the light-emitting unit can be achieved under the condition of ensuring relatively low cost.

Description

Technical Field

[0001] The present application relates to the field of drive control technology, and in particular to a drive circuit and an electronic atomizer. Background Art

[0002] With the rapid development of electronic technology, various electronic devices have become popular in thousands of households, and many electronic devices are also equipped with corresponding display screens. Even small electronic products such as electronic vaporizers are equipped with organic light-emitting diode (OLED) screens.

[0003] In related technologies, OLED screens usually require certain drivers to work properly. In some small electronic products, due to space or power limitations, relevant technicians generally use the IO interface of the microcontroller unit (MCU) to directly drive the OLED screen, or they can also set up a corresponding DC-DC converter (DCDC) to increase the driving voltage to a stable voltage value and then power the OLED screen.

[0004] However, solutions using MCUs directly for driving the OLED display suffer from poor driving capabilities, potentially preventing it from displaying properly. Solutions using DC-DC boosting are expensive and complex in circuit design. Therefore, finding an OLED driving solution that balances cost and driving capabilities is a pressing issue. Utility Model Content

[0005] The purpose of this application is to provide a driving circuit and an electronic atomizer, which can achieve the effect of improving the driving ability of the light-emitting unit while ensuring low cost.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect of an embodiment of the present application, a driving circuit is provided, the driving circuit comprising: an oscillating module, a boosting module, a display control module, and a microcontroller unit (MCU).

[0008] The first input terminal of the oscillation module is used to input an operating voltage, the first output terminal and the second output terminal of the oscillation module are respectively connected to the first input terminal and the second input terminal of the boost module, and the second input terminal of the oscillation module is connected to the MCU; the oscillation module is used to be turned on or off in response to a pulse width modulation (PWM) signal output by the MCU to output electric energy to the boost module, wherein the electric energy is generated based on the operating voltage;

[0009] The first output terminal of the boost module is connected to the input terminal of the display control module, and the second output terminal of the boost module is grounded; the boost module includes a transformer; the boost module is used to boost the electric energy and output the boosted electric energy to the display control module;

[0010] The control end of the display control module is connected to the MCU; the display control module is used to be turned on under the action of the control voltage output by the MCU, so as to use the boosted electric energy to drive the light-emitting unit corresponding to the display control module.

[0011] In this application, the oscillation module includes a switch unit and an energy storage unit;

[0012] The first end of the switch unit is used to input the operating voltage, the second end of the switch unit is connected to the first input end of the boost module, and the third end of the switch unit is connected to the first control end of the MCU; the switch unit is used to alternately turn on or off under the action of the pulse width modulation signal to intermittently output the operating voltage to the energy storage unit;

[0013] The first end of the energy storage unit is respectively connected to the third end of the switch unit and the first control end of the MCU, and the second end of the energy storage unit is connected to the second input end of the boost module; the energy storage unit is used to charge when the operating voltage is input and discharge when the operating voltage is not input.

[0014] In the present application, the switch unit includes: a first transistor and a current limiting unit;

[0015] The collector of the first transistor is used to input the operating voltage, the emitter of the first transistor is connected to the first input terminal of the boost module, and the base of the first transistor is connected to the first terminal of the current limiting unit; the first transistor is used to be alternately turned on or off under the action of the pulse width modulation signal;

[0016] The second end of the current limiting unit is connected to the first control end of the MCU, and the third end of the current limiting unit is connected to the first end of the energy storage unit; the current limiting unit is used to limit the current of the energy storage unit during charging and discharging.

[0017] In the present application, the current limiting unit includes a first resistor and a second resistor;

[0018] The first end of the first resistor is connected to the base of the first transistor, the second end of the first resistor is connected to the first end of the second resistor and the first end of the energy storage unit respectively, and the second end of the second resistor is connected to the first control end of the MCU.

[0019] In the present application, the switch unit further includes a first capacitor;

[0020] The first capacitor is connected between the collector and the base of the first transistor.

[0021] In the present application, the energy storage unit includes a second capacitor;

[0022] The first electrode plate of the second capacitor is connected to the third end of the switch unit, and the second electrode plate of the second capacitor is connected to the second input end of the boost module.

[0023] In the present application, the first input terminal and the second input terminal of the transformer are respectively connected to the first output terminal and the second output terminal of the oscillation module, the first output terminal of the transformer is connected to the input terminal of the display control module, and the second output terminal of the transformer is grounded.

[0024] In the present application, the display control module includes at least one light-emitting unit and at least one second transistor;

[0025] The first end of each light-emitting unit is connected to the first output end of the boost module, and the second end of each light-emitting unit is connected to the collector of the corresponding second triode; the light-emitting unit is configured to emit light when the corresponding second triode is turned on, and the light-emitting intensity of the light-emitting unit is determined at least by the boosted electrical energy;

[0026] The base of each second transistor is connected to the second control terminal of the MCU respectively, and the emitter of each second transistor is grounded; the second transistor is used to be turned on under the action of the boosted electric energy and the control voltage.

[0027] In the present application, the driving circuit further includes a power supply module, and the power supply module includes a switch tube and a third resistor;

[0028] The first terminal of the switch tube is used to connect to a power supply, the second terminal of the switch tube is connected to the third control terminal of the MCU, and the third terminal of the switch tube is connected to the first input terminal of the oscillation module; the switch tube is used to be turned on under the control of a start signal output by the MCU to transmit the working voltage output by the power supply to the oscillation module;

[0029] The third resistor is connected between the first electrode and the second electrode of the switch tube.

[0030] According to a second aspect of the embodiments of the present application, an electronic atomizer is provided, which includes any one of the driving circuits described in the first aspect.

[0031] The beneficial effects of the embodiments of the present application include:

[0032] An embodiment of the present application provides a drive circuit, comprising an oscillator module, a boost module including a transformer, a display control module, and an MCU. Specifically, the first input terminal of the oscillator module is used to input an operating voltage, the first output terminal and the second output terminal of the oscillator module are connected to the first input terminal and the second input terminal of the boost module, respectively, and the second input terminal of the oscillator module is connected to the MCU. The first output terminal of the boost module is connected to the input terminal of the display control module, and the second output terminal of the boost module is grounded. The control terminal of the display control module is connected to the MCU.

[0033] The oscillator module can be turned on or off using a PWM signal output by the MCU, so that the oscillator module outputs electrical energy based on the operating voltage to a boost module including a transformer. The boost module can then boost the electrical energy and output the boosted electrical energy to the display control module. The display control module is then turned on using a control voltage output by the MCU, forming a return path so that the boosted electrical energy can generate a high current between the boost module and the display control module and output to the corresponding light-emitting unit for high-current driving.

[0034] In this way, it is possible to achieve the effect of improving the driving capability of the light-emitting unit while ensuring a lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic structural diagram of a first driving circuit provided in an embodiment of the present application;

[0037] Figure 2 A schematic structural diagram of a second driving circuit provided in an embodiment of the present application;

[0038] Figure 3 A schematic structural diagram of a third driving circuit provided in an embodiment of the present application;

[0039] Figure 4 A schematic structural diagram of a fourth driving circuit provided in an embodiment of the present application;

[0040] Figure 5 A schematic structural diagram of a fifth driving circuit provided in an embodiment of the present application;

[0041] Figure 6 This is a schematic structural diagram of the sixth driving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0045] In the description of this application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0047] In related technologies, OLED screens usually require certain drivers to work properly. In some small electronic products, relevant technicians generally use the MCU's IO interface to directly drive the OLED screen, or they can also set the corresponding DCDC to increase the driving voltage to a stable voltage value and then power the OLED screen.

[0048] However, solutions using MCUs for direct drive in related technologies suffer from poor driving capabilities, which can cause OLEDs to not display properly. Solutions using DC-DC boosting are costly and complex in circuit design. Furthermore, some solutions can be replaced with more powerful drive solutions, but this may incur a higher cost due to the limited space available in these electronic products or the low voltage that the power supply can provide.

[0049] Therefore, how to provide an OLED driving solution that can balance cost and driving capability is an urgent problem to be solved.

[0050] Microcontroller Unit, also known as MCU, is referred to as MCU below, and the specific settings of the MCU are described in detail.

[0051] To this end, an embodiment of the present application provides a drive circuit, which comprises an oscillator module, a boost module, a display control module, and an MCU. Specifically, the first input terminal of the oscillator module is used to input an operating voltage, the first and second output terminals of the oscillator module are connected to the first and second input terminals of the boost module, respectively, and the second input terminal of the oscillator module is connected to the MCU; the first output terminal of the boost module is connected to the input terminal of the display control module, and the second output terminal of the boost module is grounded; and the control terminal of the display control module is connected to the MCU. This can achieve the effect of improving the driving capability of the light-emitting unit while ensuring low cost.

[0052] The embodiments of the present application are described using a driving circuit used in an electronic atomizer as an example, but this does not mean that the embodiments of the present application can only be used to drive an OLED in an electronic atomizer.

[0053] It can be understood that the driving circuit provided in the embodiment of the present application can be applied to any electronic device with an OLED screen, such as a stylus pen, mobile power supply, keyboard light, or any possible electronic device with an OLED screen, and the embodiment of the present application does not limit this.

[0054] The driving circuit provided in the embodiment of the present application is explained in detail below.

[0055] Figure 1This is a schematic diagram of the structure of a driving circuit provided by this application. The driving circuit can be applied to the above electronic devices to drive OLED, such as electronic atomizers. Figure 1 An embodiment of the present application provides a driving circuit 100 , which includes: an oscillation module 101 , a boost module 102 , a display control module 103 and an MCU 104 .

[0056] The first input terminal of the oscillation module 101 is used to input the working voltage. The first and second output terminals of the oscillation module 101 are respectively connected to the first and second input terminals of the boost module 102 . The second input terminal of the oscillation module 101 is connected to the MCU 104 .

[0057] The first output terminal of the boost module 102 is connected to the input terminal of the display control module 103 , and the second output terminal of the boost module 102 is grounded. The control terminal of the display control module 103 is connected to the MCU 104 .

[0058] The oscillation module 101 is configured to be turned on or off under the action of a PWM signal output by the MCU 104 , so as to output electric energy to the boost module 102 , where the electric energy is generated based on the operating voltage.

[0059] The boost module 102 is used to boost the electric energy and output the boosted electric energy to the display control module 103 .

[0060] The display control module 103 is configured to be turned on under the control voltage output by the MCU 104 , so as to utilize the boosted electrical energy to drive the light-emitting unit corresponding to the display control module 103 .

[0061] That is, the MCU 104 may be configured to output the PWM signal to the oscillation module 101 and output the control voltage to the display control module 103 .

[0062] Optionally, the operating voltage (such as Figure 1 The V1 shown in FIG can be provided by any possible power source, such as a battery or power supply chip in the above-mentioned electronic device. The voltage level of the operating voltage can be adjusted according to actual needs, for example, it can be 3.7V, 4.2V, or any other possible voltage level. This embodiment of the present application is not limited to this.

[0063] Optionally, the MCU 104 may be any processing unit having processing, calculation, control and other functions, and the MCU 104 may be connected to the oscillation module 101 and the display control module 103 through different IO interfaces, which is not limited in the present embodiment.

[0064] In some embodiments, MCU104 can also be connected to some trigger devices such as key units and voice input units, and perform corresponding processing and calculations based on the electrical signals input by these trigger devices to output the PWM signal and / or the control voltage.

[0065] Optionally, the PWM signal may be a square wave signal with high and low levels, and the PWM signal may be used to control the oscillation module 101 to be turned on or off.

[0066] The duty cycle, period, or frequency of the PWM signal can be set according to actual needs. Furthermore, by adjusting the duty cycle, period, or frequency of the PWM signal, the frequency at which the oscillation module 101 is turned on and off can be adjusted, thereby adjusting the amount of electrical energy output by the oscillation module 101. This embodiment of the present application is not limited to this.

[0067] In some embodiments, when the PWM signal is at a high level, the oscillation module 101 may be turned on, and conversely, when the PWM signal is at a low level, the oscillation module 101 may be turned off. This embodiment of the present application does not limit this.

[0068] Optionally, the oscillation module 101 may be a circuit or device that can generate an oscillating current whose magnitude and direction can vary. That is, the electric energy output by the oscillation module 101 to the boost module 102 may be an oscillating signal.

[0069] In some embodiments, when the oscillation module 101 is turned on, it can output a forward voltage to the boost module 102; and when the oscillation module 101 is turned off, it can output a reverse voltage to the boost module 102. The directions of the forward voltage and the reverse voltage are relative and can be specifically defined based on the actual circuit structure, and are not limited in this embodiment of the present application.

[0070] In some embodiments, the boost module 102 may include a transformer, which may be any suitable small transformer. In this case, the oscillation module 101 outputs the electrical energy to the primary side of the transformer, which then generates boosted electrical energy on the secondary side based on electromagnetic induction. In other words, the boost factor of the electrical energy can be varied by adjusting the turns ratio of the transformer. This can be adjusted based on actual needs and is not limited in this embodiment of the present application.

[0071] Optionally, the control voltage may be used to control the display control module 103 to be turned on or off.

[0072] In some embodiments, when the MCU 104 outputs the control voltage to the display control module 103 , the control module 103 may be turned on. When the MCU 104 does not output the control voltage, the display control module 103 may be turned off.

[0073] Optionally, when the display control module 103 is turned on, the boost module 102 and the display control module 103 may form a passage or a return path, so that current may flow between the boost module 102 and the display control module 103 .

[0074] In some embodiments, the display control module 103 may correspond to at least one light-emitting unit, each of which may include at least one OLED light-emitting device. When the display control module 103 is turned on, the current flowing through the boost module 102 and the display control module 103 can power each light-emitting unit.

[0075] Exemplarily, each light-emitting unit may be arranged inside the display control module 103 or outside the display control module 103 . The specific arrangement may be made according to actual needs, and the embodiment of the present application does not limit this.

[0076] It is understandable that since the PWM signal can control the oscillation module 101 to be turned on or off, thereby causing the oscillation module 101 to output corresponding electrical energy, the amount of electrical energy can be adjusted by adjusting the duty cycle, period, or frequency of the PWM signal, thereby adjusting the amount of boosted electrical energy output by the boost module 102. In this way, the current flowing through the display control module 103 can be changed when the display control module 103 is turned on.

[0077] It is worth noting that, in order to better explain the working principle of the driving circuit 100 provided in the embodiment of the present application, the embodiment of the present application takes the case where the oscillation module 101 is turned on when the PWM signal is at a high level and the display control module 103 is turned on when the control voltage is input as an example, as follows:

[0078] When the driving circuit 100 is in a sleep or power-off state, the MCU 104 does not output the PWM signal and the control voltage. At this time, the oscillation module 101 remains turned off and does not output power. The boost module 102 has no power input and does not output power, and the display control module 103 also remains turned off.

[0079] When the drive circuit 100 is powered on or enters the operating state, the operating voltage is input to the oscillator module 101, and the MCU 104 outputs the PWM signal. When the PWM signal is at a high level, the oscillator module 101 is turned on and outputs positive power to the boost module 102. When the PWM signal is at a low level, the oscillator module 101 is turned off and outputs negative power to the boost module 102. Furthermore, if the operating voltage and the PWM signal are continuously input to the oscillator module 101, the oscillator module 101 will continue to maintain an alternating switching and output state.

[0080] The boost module 102 then boosts the electrical energy output by the oscillation module 101 and outputs the boosted electrical energy to the display control module 103. When the MCU 104 outputs the control voltage to the display control module 103, the display control module 103 is turned on, allowing the boost module 102 and the display control module 103 to form a circuit or return path, thereby outputting a large current to drive the corresponding power generation unit.

[0081] At this time, if the MCU 104 stops outputting the PWM signal, the oscillation module 101 is continuously turned off. At this time, no power is input to the boost module 102 and the display control module 103 , so the corresponding light-emitting units remain turned off.

[0082] If the MCU 104 stops outputting the control voltage, the display control module 103 will remain turned off, so the boosted power generated by the boost module 102 cannot be output to the corresponding light-emitting unit, and the light-emitting unit will also remain turned off.

[0083] It is understandable that before the oscillation module 101 is turned on for the first time, the oscillation module 101 is continuously in the off state. At this time, the oscillation module 101 may not be able to output reverse power to the boost module 102. Generally, the first time the oscillation module 101 is turned on can be regarded as the driving circuit 100 entering the working state.

[0084] In addition, if there are some energy storage devices such as inductors or capacitors in the oscillation module 101, these energy storage devices will discharge to the outside after stopping outputting the PWM signal or the operating voltage. This embodiment of the present application does not limit this.

[0085] As can be seen from the above, the driving circuit provided in the embodiment of the present application can boost the operating voltage to a higher voltage level, stable electrical energy through a boost module including a transformer. Furthermore, the display control module 103 can be controlled to conduct to form a return path, thereby outputting a high current to the corresponding light-emitting unit based on the boosted electrical energy for driving. In this way, high-current driving of the light-emitting unit of the OLED can be achieved, effectively improving the ability to drive the light-emitting unit.

[0086] Furthermore, the cost of the transformer is relatively low, and the power supply and / or driving of the transformer can be achieved through a simple analog circuit. Therefore, the present application has relatively low equipment cost and design cost.

[0087] In the embodiment of the present application, an oscillating module 101, a boosting module 102 including a transformer, a display control module 103, and an MCU 104 are provided. Specifically, the first input terminal of the oscillating module 101 is used to input an operating voltage, the first output terminal and the second output terminal of the oscillating module 101 are connected to the first input terminal and the second input terminal of the boosting module 102, respectively, and the second input terminal of the oscillating module 101 is connected to the MCU 104. The first output terminal of the boosting module 102 is connected to the input terminal of the display control module 103, and the second output terminal of the boosting module 102 is grounded. The control terminal of the display control module 103 is connected to the MCU 104.

[0088] The oscillation module 101 can be turned on or off by a PWM signal output by the MCU 104, so that the oscillation module 101 outputs electrical energy to the boost module 102 including a transformer based on the operating voltage. The boost module 102 can then boost the electrical energy and output the boosted electrical energy to the display control module 103. The display control module 103 is then turned on by a control voltage output by the MCU 104, forming a return path so that the boosted electrical energy can generate a high current between the boost module 102 and the display control module 103 and output it to the corresponding light-emitting unit for high-current driving.

[0089] In this way, it is possible to achieve the effect of improving the driving capability of the light-emitting unit while ensuring a lower cost.

[0090] In one possible implementation, see Figure 2 The oscillation module 101 includes a switch unit 1011 and an energy storage unit 1012 .

[0091] A first terminal of the switch unit 1011 is used to input the working voltage, a second terminal of the switch unit 1011 is connected to a first input terminal of the boost module 102 , and a third terminal of the switch unit 1011 is connected to a first control terminal of the MCU 104 .

[0092] A first end of the energy storage unit 1012 is connected to the third end of the switch unit 1011 and the first control end of the MCU 104 , respectively. A second end of the energy storage unit 1012 is connected to the second input end of the boost module 102 .

[0093] The switch unit 1011 is configured to be alternately turned on or off under the action of the PWM signal, so as to intermittently output the operating voltage to the energy storage unit 1012 .

[0094] The energy storage unit 1012 is configured to be charged when the operating voltage is input, and to be discharged when the operating voltage is not input.

[0095] Optionally, the switch unit 1011 may include any possible controllable switch, such as a triode, a metal-oxide-semiconductor field-effect transistor (MOS transistor), or an insulated-gate bipolar transistor (IGBT), etc., and this embodiment of the present application does not limit this.

[0096] Optionally, the energy storage unit 1012 may include any possible energy storage device, such as a capacitor, etc., which can ensure that the energy storage unit 1012 can discharge to the outside when not charging.

[0097] For example, when the operating voltage is input, the switch unit 1011 may be turned on when the PWM signal is at a high level, and may be turned off when the PWM signal is at a low level.

[0098] Furthermore, when the switch unit 1011 is turned on, the operating voltage can be input to the energy storage unit 1012 to charge the energy storage unit 1012. When the switch unit 1011 is turned off, the operating voltage cannot be input to the energy storage unit 1012, and the energy storage unit 1012 will discharge.

[0099] It is understood that the PWM signal controls the switch unit 1011 to alternately turn on and off, thereby intermittently outputting the operating voltage to the energy storage unit 1012. When the operating voltage is output to the energy storage unit 1012, a path is formed to charge the energy storage unit 1012 and simultaneously output a forward voltage to the boost module 102. When the energy storage unit 1012 is discharged, a path is also formed to output a reverse voltage to the boost module 102. In this way, the boost module 102 generates electromagnetic induction under the action of the forward and reverse voltages, thereby outputting boosted electrical energy.

[0100] In one possible implementation, see Figure 3 The switch unit 1011 includes: a first transistor Q1 and a current limiting unit X.

[0101] The collector of the first transistor Q1 is used to input the working voltage, the emitter of the first transistor Q1 is connected to the first input end of the boost module 102 , and the base of the first transistor Q1 is connected to the first end of the current limiting unit X.

[0102] The second end of the current limiting unit X is connected to the first control end of the MCU 104 , and the third end of the current limiting unit X is connected to the first end of the energy storage unit 1012 .

[0103] The first transistor Q1 is used to be alternately turned on or off under the action of the PWM signal.

[0104] The current limiting unit X is used to limit the current of the energy storage unit 1012 during charging and discharging.

[0105] Optionally, the first transistor Q1 may be an NPN transistor. The specific model and operating parameters may be selected according to actual needs, and are not limited in this embodiment of the present application.

[0106] Optionally, the current limiting unit X may include any current limiting device, such as a resistor, a diode, etc., and the number of devices in the current limiting unit X is at least 1. This embodiment of the present application does not limit this.

[0107] It can be understood that since the collector of the first transistor Q1 is used to input the working voltage, when the PWM signal is input to the base of the first transistor Q1 through the current limiting unit X, if the PWM signal is high, then the collector and base of the first transistor Q1 are both at positive potential relative to the emitter, which meets the conduction condition of the first transistor Q1. At this time, the first transistor Q1 is turned on and can output the working voltage to the energy storage unit 1012; if the PWM signal is low, then the collector of the first transistor Q1 is at a positive potential relative to the emitter, and the base is not at a positive potential relative to the emitter, which does not meet the conduction condition of the first transistor Q1. At this time, the first transistor Q1 is turned off, and the energy storage unit 1012 has no power input and starts to discharge to the outside.

[0108] In one possible implementation, see Figure 4 , the current limiting unit X includes a first resistor R1 and a second resistor R2.

[0109] The first end of the first resistor R1 is connected to the base of the first transistor Q1, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the energy storage unit 1012 respectively, and the second end of the second resistor R2 is connected to the first control end of the MCU104.

[0110] In some embodiments, the resistance of the first resistor R1 can be smaller than the resistance of the second resistor R2. In addition, resistors of corresponding resistance values can be selected as the first resistor R1 and the second resistor R2 based on the level of the PWM signal, the voltage level of the operating voltage, and / or the parameters of other components in the circuit. For example, if the operating voltage is 4.2V, a 22Ω resistor can be selected as the first resistor R1 and a 1000Ω resistor can be selected as the second resistor R2. This embodiment of the present application is not limited to this.

[0111] It is understood that, in this way, the current during charging and discharging of the energy storage unit 1012 can be limited by the first resistor R1 and the second resistor R2, so as to prevent excessive current in the loop from damaging the first transistor Q1 and the energy storage unit 1012. In addition, since the resistance of the second resistor R2 is relatively large, the second resistor R2 can also protect the IO interface of the MCU 104 outputting the PWM signal from being damaged during charging and discharging of the energy storage unit 1012.

[0112] In this way, the safety and practicality of the driving circuit 100 can be improved.

[0113] In one embodiment, see Figure 4 , the switch unit 1011 also includes a first capacitor C1.

[0114] The first capacitor C1 is connected between the collector and the base of the first transistor Q1 .

[0115] Optionally, a capacitor with a suitable capacitance value may be selected as the first capacitor C1 according to parameters of other components in the circuit 100 . Generally, the capacitance value of the first capacitor C1 is relatively small, which is not limited in the embodiment of the present application.

[0116] It is understandable that the first capacitor C1 can be used as a filter capacitor to stabilize the voltage of the circuit and filter out noise in the circuit, thereby achieving the effect of improving the stability of the driving circuit 100.

[0117] A possible implementation method is shown in Figure 4 , the energy storage unit 1012 includes a second capacitor C2.

[0118] The first plate of the second capacitor C2 is connected to the third terminal of the switch unit 1011, and the second plate of the second capacitor C2 is connected to the second input terminal of the boost module 102. Optionally, a capacitor with a suitable capacitance value can be selected as the second capacitor C2 based on the parameters of other components in the circuit 100. Generally, the capacitance of the second capacitor C2 can be slightly larger, for example, the capacitance of the second capacitor C2 can be greater than that of the first capacitor C1, but this is not limited in the present embodiment.

[0119] It is understood that when the switch unit 1011 is turned on, the operating voltage can be input into the second capacitor C2 to charge the second capacitor C2, thereby forming a current path to output a positive voltage to the boost module 102. When the switch unit 1011 is turned off, the second capacitor C2 can begin to discharge, thereby outputting a negative voltage to the boost module 102. In this way, the different current directions during charging and discharging of the second capacitor C2 can be utilized to generate electromagnetic induction in the transformer of the boost module 102, thereby achieving the purpose of boosting voltage.

[0120] In one possible implementation, see Figure 4The first input terminal and the second input terminal of the transformer T are respectively connected to the first output terminal and the second output terminal of the oscillation module 101, the first output terminal of the transformer T is connected to the input terminal of the display control module 103, and the second output terminal of the transformer T is grounded.

[0121] Optionally, the first input terminal and the second input terminal of the transformer T refer to the primary side of the transformer T, and the first output terminal and the second output terminal of the transformer T refer to the secondary side of the transformer T.

[0122] In this embodiment, the transformer T is used to boost the voltage, and the boost ratio of the transformer T is determined by the turns ratio between the primary and secondary sides of the transformer T. For example, if the voltage input from the oscillation module 101 to the primary side of the transformer T is 5V, and the voltage output from the secondary side is required to be 200V, then the turns ratio between the primary and secondary sides of the transformer T can be set to 1:40.

[0123] In some embodiments, the primary side of the transformer T may also be grounded, and when the primary side of the transformer T is grounded, the ground terminal of the primary side of the transformer T may be connected to the second output terminal of the transformer T via a resistor. In this way, the anti-interference capability of the transformer T may be improved.

[0124] It can be understood that the transformer T has a relatively efficient boosting capability and the cost of the transformer T is low. Therefore, the driving circuit 100 uses the transformer T for boosting, which can not only effectively increase the voltage output to the display control module 103 and enhance the driving capability of the light-emitting unit, but also reduce the cost of the driving circuit 100.

[0125] In one possible implementation, see Figure 5 The display control module 103 includes at least one light emitting unit F and at least one second transistor Q2.

[0126] The first end of each light emitting unit F is connected to the first output end of the boost module 102 , and the second end of each light emitting unit F is connected to the collector of the corresponding second transistor Q2 .

[0127] The base of each second transistor Q2 is connected to the second control terminal of the MCU 104 , and the emitter of each second transistor Q2 is grounded.

[0128] The second transistor Q2 is used to be turned on under the action of the boosted electric energy and the control voltage.

[0129] The light emitting unit F is used to emit light when the corresponding second transistor Q2 is turned on. The light emitting intensity of the light emitting unit F is at least determined by the boosted electric energy.

[0130] Optionally, when the display control module 103 includes multiple light-emitting units F, the boost module 102 can also be provided with multiple first output terminals, and each first output terminal of the boost module 102 can be connected to the first terminal of each light-emitting unit F respectively. This embodiment of the present application does not limit this.

[0131] Furthermore, if the display control module 103 includes multiple second transistors Q2, the MCU 104 may also be provided with multiple corresponding second control terminals, and each second control terminal of the MCU 104 may be connected to the base of each second transistor Q2. In this way, the MCU 104 can control different second control terminals to output the control voltage to turn different second transistors Q2 on or off.

[0132] Optionally, the light emitting unit F may include multiple light emitting OLEDs or an OLED matrix. In other words, the multiple light emitting units F may be arranged according to a certain rule and / or a certain order to form an OLED screen.

[0133] Optionally, the second transistor Q2 can be an NPN transistor. The specific model and operating parameters can be selected according to actual needs and are not limited in this embodiment of the present application. In some embodiments, the MCU 104 can be connected to the base of each second transistor Q2 via multiple second control terminals in a one-to-one correspondence. In this way, the multiple IO ports of the MCU 104 can be used to control the conduction or shutdown of different second transistors Q2, thereby controlling whether the multiple light-emitting units F are powered on and emit light.

[0134] In some embodiments, eight light-emitting units F and eight second transistors Q2 can be provided in the display control module 103, and the bases of the eight second transistors Q2 are then connected to the eight second control terminals of the MCU 104. When the boost module 102 applies a voltage to the collectors of the respective second transistors Q2 via the light-emitting units F, the MCU 104 can determine the light-emitting units F that need to be powered on based on the current display content, and then output the control voltage to the second transistors Q2 corresponding to the light-emitting units F that need to be powered on via the eight second control terminals to control the corresponding second transistors Q2 to conduct. This allows the boost module 102, the light-emitting units F that need to be powered on, and the corresponding second transistors Q2 to form a current return path, thereby outputting a large current to drive the power generation units F that need to be powered on. In this way, light emission control of the OLED screen can be achieved.

[0135] For example, in order to better explain the manner in which the driving circuit 100 drives the light-emitting unit F, the embodiment of the present application further provides a possible control logic, which is described below in detail:

[0136] Assuming that the operating voltage is 5V, the boost ratio of the boost module 102 is 1:40, and the voltage required for the light-emitting unit F to operate at maximum brightness is 200V (this voltage can be determined based on the operating current of the light-emitting unit F, and this embodiment of the present application is not limited to this). Then, if the MCU 104 determines that all light-emitting units F do not need to be powered on based on the content currently to be displayed, then the output of the control voltage or the PWM signal can be stopped.

[0137] If the MCU 104 determines that all the light-emitting units F need to be powered on according to the content currently to be displayed, then the MCU 104 can output a corresponding PWM signal to the oscillation module 101 and output the control voltage to each second transistor Q2 .

[0138] If the MCU 104 determines that a certain light emitting unit F needs to be controlled to operate at maximum brightness according to the content currently to be displayed, the MCU 104 can output a first PWM signal to the oscillation module 101 and output the control voltage to the second transistor Q2 corresponding to the light emitting unit F.

[0139] If the MCU 104 determines that a certain light emitting unit F needs to be controlled to operate at half the maximum brightness according to the content currently to be displayed, the MCU 104 can output a second PWM signal to the oscillation module 101 and output the control voltage to the second transistor Q2 corresponding to the light emitting unit F.

[0140] Optionally, the duty cycle, period, and / or frequency of the first PWM signal and the second PWM signal may be adjusted according to actual conditions. Generally, if the first PWM signal and the second PWM signal have the same period, the duty cycle of the first PWM signal is greater than the duty cycle of the second PWM signal.

[0141] That is, within the target duration, the effective duration of the first PWM signal is greater than the effective duration of the second PWM signal. The target duration is greater than one complete cycle of the first PWM signal and also greater than one complete cycle of the second PWM signal. In this way, the brightness of the light-emitting unit F can be adjusted by adjusting the duty cycle, period, and / or frequency of the PWM signal.

[0142] In addition, the conduction degree of the second transistor Q2 can be controlled by adjusting the voltage of the control voltage, thereby controlling the current flowing through the second transistor Q2 to control the brightness of the corresponding light-emitting unit F. This embodiment of the present application does not limit this.

[0143] It can be understood that since the collector of the second transistor Q2 is used to input the boosted electric energy, when the MCU104 inputs the control voltage to the base of the second transistor Q2, the collector and base of the second transistor Q2 are both at positive potential relative to the emitter, satisfying the conduction condition of the second transistor Q2. At this time, the second transistor Q2 is turned on, and a current return path can be formed to output a large current to the light-emitting unit F for driving; if the MCU104 does not input the control voltage to the base of the second transistor Q2, then the collector of the second transistor Q2 is at a positive potential relative to the emitter, and the base is not at a positive potential relative to the emitter, and the conduction condition of the second transistor Q2 is not satisfied. At this time, the second transistor Q2 is turned off, and the light-emitting unit F is not driven by current and does not emit light.

[0144] In one possible implementation, see Figure 6 The driving circuit 100 further includes a power supply module 105 , which includes a switch tube Q3 and a third resistor R3 .

[0145] The first terminal of the switch tube Q3 is used to connect to the power supply, the second terminal of the switch tube Q3 is connected to the third control terminal of the MCU 104 , and the third terminal of the switch tube Q3 is connected to the first input terminal of the oscillation module 101 .

[0146] The third resistor R3 is connected between the first electrode and the second electrode of the switch tube Q3.

[0147] The MCU 104 is further configured to output a start signal to the switch tube Q3 .

[0148] The switch tube Q3 is configured to be turned on under the control of the start signal to transmit the operating voltage output by the power supply to the oscillation module 101 .

[0149] Optionally, the power source may be any battery or battery pack, and the output voltage V2 of the power source may be adjusted according to actual needs, which is not limited in the embodiment of the present application.

[0150] Optionally, the switch tube Q3 may be a P-channel switch tube, such as a PMOS tube, a P-channel IGBT tube, or a P-channel silicon carbide MOS tube, which is not limited in the present embodiment.

[0151] Optionally, the third resistor R3 can be a resistor with a relatively high resistance, which can generally be used as a bias resistor to ensure the normal operation of the switch Q3. In addition, it can also release parasitic capacitance and / or static electricity between the first and second electrodes of the switch Q3. In this way, the safety and practicality of the driving circuit 100 can be improved.

[0152] Optionally, the voltage level of the start signal may be greater than or equal to a turn-on voltage threshold of the switch tube Q3.

[0153] In some possible embodiments, MCU104 may output the start signal directly after power-on, or may output the start signal after power-on and when it is determined that content needs to be displayed on the OLED screen. This embodiment of the present application does not limit this.

[0154] It can be understood that since the first pole of the switch tube Q3 is connected to the power supply, when the MCU104 outputs the start signal to the second pole of the switch tube Q3, the conduction condition of the switch tube Q3 can be met. At this time, the second pole and the third pole of the switch tube Q3 are conductive, so the power supply can output the operating voltage to the oscillation module 101 through the switch tube Q3.

[0155] In this way, the MCU 104 can flexibly and conveniently control the power-on or power-off of the oscillation module 101 by controlling the on or off of the switch tube Q3 , thereby improving the practicality of the driving circuit 100 .

[0156] One possible way, see Figure 6 The driving circuit 100 may further include a connector P. The connector P may be provided between the first output terminal of the boost module 102 and each input terminal of the display control module 103 .

[0157] Optionally, when the display control module 103 includes a plurality of light-emitting units F, the connector P may be provided between the first output end of the boost module 102 and the first end of each light-emitting unit F.

[0158] In this way, the first output terminal of the boost module 102 and the input terminals of the display control module 103 can be reliably connected through the connector P, so as to ensure that the boost module 102 can stably and reliably output the boosted electric energy to the display control module 103.

[0159] The embodiment of the present application further provides an electronic atomizer, which includes at least any one of the driving circuits 100 provided in the above embodiments.

[0160] In some embodiments, the electronic atomizer may also include a power supply, an atomization device, an output circuit, a charging circuit, a data interface (such as a USB interface), a voice input device (such as a microphone), a button device, and any other device that can realize the functions related to the electronic atomizer. The embodiments of the present application do not limit this.

[0161] It can be understood that the electronic atomizer has the same working principle as the above-mentioned driving circuit 100, and can realize any function that the driving circuit 100 can realize. Its specific implementation process and technical effects are mentioned above, and the embodiments of this application will not be repeated here.

[0162] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

[0163] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A driving circuit, characterized in that: The driving circuit includes: an oscillation module, a boost module, a display control module and a micro control unit; The first input terminal of the oscillation module is used to input an operating voltage, the first output terminal and the second output terminal of the oscillation module are respectively connected to the first input terminal and the second input terminal of the boost module, and the second input terminal of the oscillation module is connected to the micro control unit; the oscillation module is used to be turned on or off in response to a pulse width modulation signal output by the micro control unit to output electric energy to the boost module, wherein the electric energy is generated based on the operating voltage; The first output terminal of the boost module is connected to the input terminal of the display control module, and the second output terminal of the boost module is grounded; the boost module includes a transformer; the boost module is used to boost the electric energy and output the boosted electric energy to the display control module; The control end of the display control module is connected to the micro control unit; the display control module is used to be turned on under the action of the control voltage output by the micro control unit, so as to use the boosted electric energy to drive the light-emitting unit corresponding to the display control module.

2. The driving circuit according to claim 1, wherein: The oscillation module includes a switch unit and an energy storage unit; The first end of the switch unit is used to input the operating voltage, the second end of the switch unit is connected to the first input end of the boost module, and the third end of the switch unit is connected to the first control end of the micro control unit; the switch unit is used to alternately turn on or off under the action of the pulse width modulation signal to intermittently output the operating voltage to the energy storage unit; The first end of the energy storage unit is respectively connected to the third end of the switch unit and the first control end of the micro control unit, and the second end of the energy storage unit is connected to the second input end of the boost module; the energy storage unit is used to charge when the working voltage is input and discharge when the working voltage is not input.

3. The driving circuit according to claim 2, wherein: The switch unit includes: a first transistor and a current limiting unit; The collector of the first transistor is used to input the operating voltage, the emitter of the first transistor is connected to the first input terminal of the boost module, and the base of the first transistor is connected to the first terminal of the current limiting unit; the first transistor is used to be alternately turned on or off under the action of the pulse width modulation signal; The second end of the current limiting unit is connected to the first control end of the micro control unit, and the third end of the current limiting unit is connected to the first end of the energy storage unit; the current limiting unit is used to limit the current of the energy storage unit during charging and discharging.

4. The driving circuit according to claim 3, wherein: The current limiting unit includes a first resistor and a second resistor; The first end of the first resistor is connected to the base of the first transistor, the second end of the first resistor is connected to the first end of the second resistor and the first end of the energy storage unit respectively, and the second end of the second resistor is connected to the first control end of the micro control unit.

5. The driving circuit according to claim 3, wherein: The switch unit further includes a first capacitor; The first capacitor is connected between the collector and the base of the first transistor.

6. The driving circuit according to claim 2, wherein: The energy storage unit includes a second capacitor; The first electrode plate of the second capacitor is connected to the third end of the switch unit, and the second electrode plate of the second capacitor is connected to the second input end of the boost module.

7. The driving circuit according to claim 1, wherein: The first input terminal and the second input terminal of the transformer are respectively connected to the first output terminal and the second output terminal of the oscillation module, the first output terminal of the transformer is connected to the input terminal of the display control module, and the second output terminal of the transformer is grounded.

8. The driving circuit according to claim 1, wherein: The display control module includes at least one light emitting unit and at least one second triode; The first end of each light-emitting unit is connected to the first output end of the boost module, and the second end of each light-emitting unit is connected to the collector of the corresponding second triode; the light-emitting unit is configured to emit light when the corresponding second triode is turned on, and the light-emitting intensity of the light-emitting unit is determined at least by the boosted electrical energy; The base of each second transistor is connected to the second control terminal of the micro control unit respectively, and the emitter of each second transistor is grounded; the second transistor is used to be turned on under the action of the boosted electric energy and the control voltage.

9. The driving circuit according to any one of claims 1 to 8, wherein: The driving circuit further includes a power supply module, which includes a switch tube and a third resistor; The first terminal of the switch tube is used to connect to a power supply, the second terminal of the switch tube is connected to the third control terminal of the micro control unit, and the third terminal of the switch tube is connected to the first input terminal of the oscillation module; The switch tube is used to be turned on under the control of the start signal output by the micro control unit to transmit the working voltage output by the power supply to the oscillation module; The third resistor is connected between the first electrode and the second electrode of the switch tube.

10. An electronic atomizer, characterized in that: The electronic atomizer includes the driving circuit according to any one of claims 1 to 9.

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