Control circuit for lightening cold light sheet and electronic cigarette

Abstract

The utility model provides a control circuit for lightening a cold light sheet and an electronic cigarette. The control circuit comprises a power supply module, an inductor, a first control circuit, a second control circuit, the cold light sheet and a third control circuit, two ends of the inductor are respectively connected with the power supply module and the first control circuit, so that the power supply module charges the inductor when the first control circuit is connected with the inductor, and the inductor generates reverse electromotive force when the first control circuit is disconnected; the two ends of the cold light sheet are connected with the inductor and the second control circuit respectively, and the power module is used for charging the cold light sheet when the first control circuit is disconnected and the third control circuit is connected with the cold light sheet. And the third control circuit is connected with the cold light sheet and is used for discharging the cold light sheet when the first control circuit is switched on and the second control circuit is switched off. Therefore, efficient utilization of energy is realized, the number of elements in the circuit is reduced, the circuit design is simplified, and the manufacturing cost of a product is reduced.

Description

Technical Field

[0001] The present application relates to the field of electronic cigarettes, and in particular to a control circuit for lighting a cold light sheet and an electronic cigarette. Background Art

[0002] In the modern consumer electronics market, as a fashionable alternative to smoking, the appearance design and user experience of electronic cigarettes are increasingly valued. In order to enhance the attractiveness of the product, electronic cigarettes are often equipped with cold light sheets as decorative and display elements. Cold light sheets, with their unique electroluminescent phenomenon, can provide soft and varied light, increase the visual effect of the product and the user interaction experience. However, the driving circuit design of cold light sheets has high requirements for the battery life, safety and cost control of the product.

[0003] At present, the conventional technical solution for driving EL involves converting the DC voltage of the battery into AC high voltage. This usually requires the use of complex components such as transformers, rectifiers and high-voltage isolation circuits to ensure that the EL can work properly. These components not only increase the size and cost of electronic products, but may also lead to low efficiency in power conversion and affect the endurance of electronic products. In addition, handling high-voltage circuits also brings safety hazards, and additional protective measures need to be taken during the design to avoid the risk of electrical failure or electric shock to users.

[0004] Therefore, it is necessary to provide a simple, efficient and safe circuit to drive and light up the cold light sheet. Utility Model Content

[0005] In view of this, it is necessary to provide a control circuit for lighting up a cold light sheet and an electronic cigarette to solve the above problems.

[0006] The embodiment of the present application provides a control circuit for lighting up a cold light sheet, including: a power module, an inductor, a first control circuit, a second control circuit, a cold light sheet, and a third control circuit;

[0007] The two ends of the inductor are respectively connected to the power module and the first control circuit, so that when the first control circuit is connected to the inductor, the power module charges the inductor, and when the first control circuit is disconnected, the inductor generates a reverse electromotive force;

[0008] Two ends of the cold light sheet are respectively connected to the inductor and the second control circuit, so that when the first control circuit is disconnected and the third control circuit is connected to the cold light sheet, the power module is used to charge the cold light sheet;

[0009] The third control circuit is connected to the EL sheet and is used for causing the EL sheet to discharge when the first control circuit is turned on and the second control circuit is turned off.

[0010] In at least one embodiment of the present application, the first control circuit includes a first control module, a resistor R1, and a first protection loop, and two ends of the resistor R1 are respectively connected to the first control module and the first protection loop.

[0011] In at least one embodiment of the present application, the first protection circuit includes a resistor R4 and a transistor switch Q1, the transistor switch Q1 includes a first pin, a second pin and a third pin connected to the inductor, one end of the resistor R4 is connected between the first pin and the resistor R1, and the other end of the resistor R4 is connected to the second pin, and the second pin is grounded.

[0012] In at least one embodiment of the present application, the second control circuit includes a second control module, a resistor R3, and a second protection loop, and two ends of the resistor R3 are respectively connected to the second control module and the second protection loop.

[0013] In at least one embodiment of the present application, the second protection circuit includes a resistor R6 and a transistor switch Q3, the transistor switch Q3 includes a fourth pin, a fifth pin and a sixth pin connected to the cold light sheet, one end of the resistor R6 is connected between the fourth pin and the resistor R3, the other end of the resistor R6 is connected to the fifth pin, and the fifth pin is grounded.

[0014] In at least one embodiment of the present application, the third control circuit includes a third control module, a resistor R2, and a third protection loop, and two ends of the resistor R2 are respectively connected to the third control module and the third protection loop.

[0015] In at least one embodiment of the present application, the third protection circuit includes a resistor R5 and a transistor switch Q2, the transistor switch Q2 includes a seventh pin, an eighth pin and a ninth pin connected to the inductor, one end of the resistor R5 is connected between the seventh pin and the resistor R2, the other end of the resistor R5 is connected to the eighth pin, and the ninth pin is grounded.

[0016] In at least one embodiment of the present application, a diode is further included, wherein a positive terminal of the diode is connected to the inductor, and a negative terminal of the diode is connected to the cold light sheet.

[0017] In at least one embodiment of the present application, a capacitor C1 and a capacitor C2 are further included, and the capacitor C1 and the capacitor C2 are connected between the inductor and the power module.

[0018] In at least one embodiment of the present application, an electronic cigarette includes a housing, a circuit board disposed in the housing, and a control circuit for lighting up the cold light sheet as described above.

[0019] The control circuit for lighting up the cold light film provided above realizes efficient conversion from a lower voltage to the required operating voltage by using the coordinated work of the power module, the inductor and the control circuit. When the power module is working, when the first control circuit is connected to the inductor, the inductor is charged. When the first control circuit is disconnected from the inductor, the inductor generates a reverse electromotive force. By repeatedly switching on and off the first control circuit, the voltage is increased, and the cold light film is cyclically charged and discharged. An alternating voltage is generated at both ends of the cold light film. Different voltage values ​​and frequencies can obtain different brightness colors. This realizes efficient use of energy, reduces the number of components in the circuit, simplifies circuit design, and reduces the manufacturing cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a control circuit for lighting up a cold light sheet in one embodiment of the present application.

[0021] Figure 2 Schematic diagram of the structure of the first control circuit in one embodiment of the present application.

[0022] Figure 3 Schematic diagram of the structure of the second control circuit in one embodiment of the present application.

[0023] Figure 4 Schematic diagram of the structure of the third control circuit in one embodiment of the present application.

[0024] Main component symbols

[0025] 100, control circuit of cold light film; 10, power module; 20, inductor; 30, first control circuit; IO1, first control module; 31, first protection circuit; Q11, first pin; Q12, second pin; Q13, third pin; 40, second control circuit; IO3, second control module; 41, second protection circuit; Q31, fourth pin; Q32, fifth pin; Q33, sixth pin; 50, cold light film; 60, third control circuit; IO2, third control module; 61, third protection circuit; Q21, seventh pin; Q22, eighth pin; Q23, ninth pin; D1, diode. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0027] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0028] The embodiment of the present application provides a control circuit for lighting up a cold light sheet, including: a power module, an inductor, a first control circuit, a second control circuit, a cold light sheet, and a third control circuit;

[0029] The two ends of the inductor are respectively connected to the power module and the first control circuit, so that when the first control circuit is connected to the inductor, the power module charges the inductor, and when the first control circuit is disconnected, the inductor generates a reverse electromotive force;

[0030] Two ends of the cold light sheet are respectively connected to the inductor and the second control circuit, so that when the first control circuit is disconnected and the third control circuit is connected to the cold light sheet, the power module is used to charge the cold light sheet;

[0031] The third control circuit is connected to the EL sheet and is used for causing the EL sheet to discharge when the first control circuit is turned on and the second control circuit is turned off.

[0032] The control circuit for lighting up the cold light film provided above realizes efficient conversion from a lower voltage to the required operating voltage by using the coordinated work of the power module, the inductor and the control circuit. When the power module is working, when the first control circuit is connected to the inductor, the inductor is charged. When the first control circuit is disconnected from the inductor, the inductor generates a reverse electromotive force. By repeatedly switching on and off the first control circuit, the voltage is increased, and the cold light film is cyclically charged and discharged. An alternating voltage is generated at both ends of the cold light film. Different voltage values ​​and frequencies can obtain different brightness colors. This realizes efficient use of energy, reduces the number of components in the circuit, simplifies circuit design, and reduces the manufacturing cost of the product.

[0033] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] See also Figure 1-Figure 4 The embodiment of the present application provides a control circuit 100 for lighting up a cold light sheet 50 , including: a power module 10 , an inductor 20 , a first control circuit 30 , a second control circuit 40 , a cold light sheet 50 , and a third control circuit 60 .

[0035] The two ends of the inductor 20 are respectively connected to the power module 10 and the first control circuit 30, so that when the first control circuit 30 is connected to the inductor 20, the power module 10 charges the inductor 20, and when the first control circuit 30 is disconnected, the inductor 20 generates a reverse electromotive force;

[0036] The two ends of the cold light sheet 50 are respectively connected to the inductor 20 and the second control circuit 40, so that when the first control circuit 30 is disconnected and the third control circuit 60 is connected to the cold light sheet 50, the power module 10 is used to charge the cold light sheet 50;

[0037] The third control circuit 60 is connected to the EL sheet 50 and is used for causing the EL sheet 50 to discharge when the first control circuit 30 is turned on and the second control circuit 40 is turned off.

[0038] Specifically, the power module 10 provides necessary power for the entire control circuit and the cold light film 50. The inductor 20 is connected to the power module 10 and the first control circuit 30. When the first control circuit 30 is turned on, the power module 10 charges the inductor 20; when the first control circuit 30 is turned off, the inductor 20 generates a reverse electromotive force. The first control circuit 30 controls the charging and discharging of the inductor 20. The second control circuit 40 is connected to the cold light film 50, and is used to control the charging process of the cold light film 50 to ensure that the cold light film 50 can obtain appropriate power when receiving the discharge of the inductor 20, so as to maintain the stable brightness of the cold light film 50. The cold light film 50, as a display component of the circuit, emits light according to the change of current. The third control circuit 60 discharges the cold light film 50 when the first control circuit 30 is turned on and the second control circuit 40 is turned off.

[0039] Further, when the power module 10 is started, the power module 10 starts to charge the inductor 20, and the first control circuit 30 is closed at this time. When the first control circuit 30 is turned on, the inductor 20 generates a reverse electromotive force due to power failure, and the second control circuit 40 is turned on at this time. The overall voltage is the reverse electromotive force superimposed on the voltage of the power module 10, so that the overall voltage is increased and flows to the cold light sheet 50 through the second control circuit 40, and the cold light sheet 50 starts to charge and emit light. When the cold light sheet 50 needs to be turned off, the third control circuit 60 will be disconnected, allowing the cold light sheet 50 to discharge, thereby turning off the output of the cold light sheet 50. Through the inductor 20 and controlling each circuit, the stable light emission of the cold light sheet 50 can be achieved, and the service life and light emission effect of the cold light sheet 50 can be improved.

[0040] In a specific embodiment, the first control circuit 30 includes a first control module IO1, a resistor R1, and a first protection loop 31, and two ends of the resistor R1 are connected to the first control module IO1 and the first protection loop 31 respectively.

[0041] Specifically, the first control module IO1 is part of the core control unit, responsible for receiving signals and controlling the working state of the entire circuit based on these signals. The resistor R1 connects the first control module IO1 and the first protection loop 31, and plays a role in limiting and regulating the current flowing to the first protection loop 31 to prevent excessive current from damaging the circuit.

[0042] Furthermore, when the power module 10 is started, the first control module IO1 receives the start signal and outputs a high level, so that the first protection circuit 31 is turned on, and the power module 10 starts to charge the inductor 20. The resistor R1 ensures that the current flowing to the first protection circuit 31 is kept at a safe level to prevent the circuit from being damaged due to excessive current. If the first control module IO1 detects any abnormality (such as a sudden increase in current), it will instruct the first protection circuit 31 to act, that is, to disconnect the circuit or limit the current, thereby protecting the circuit from further damage.

[0043] In a specific embodiment, the first protection circuit 31 includes a resistor R4 and a transistor switch Q1, the transistor switch Q1 includes a first pin Q11, a second pin Q12 and a third pin Q13 connected to the inductor 20, one end of the resistor R4 is connected between the first pin Q11 and the resistor R1, and the other end of the resistor R4 is connected to the second pin Q12, and the second pin Q12 is grounded.

[0044] Specifically, the transistor switch Q1 is used as a control switch in the circuit, and its three pins are used to control and protect the circuit. The first pin Q11 is the base, the second pin Q12 is the emitter, and the third pin Q13 is the collector. The first pin Q11 (base) receives a control signal to determine whether the transistor switch Q1 is turned on. The second pin Q12 (emitter) is usually connected to the ground wire to complete the closed loop of the circuit. The third pin Q13 (collector) is connected to the inductor 20 to control the current passing through the inductor 20. The resistor R4 is connected to the first pin Q11 and the second pin Q12 of the transistor switch Q1, that is, the resistor R4 is connected in parallel with the transistor switch Q1, which is used to stabilize the base current, protect the transistor switch Q1 from current shock, and ensure that it operates in a safe working state, thereby extending its service life and maintaining the stability of the circuit.

[0045] Furthermore, when the circuit is operating normally, the signal control output of the first control module IO1 is high, the transistor switch Q1 is closed, and the resistor R4 controls the current of the first pin Q11, and together with the resistor R1, limits the current of the first pin Q11, i.e., the base, to protect the transistor switch Q1 from being damaged due to excessive current, and maintain the normal operating state of the transistor switch Q1. When the transistor switch Q1 switches from the on state to the off state, the parallel resistor R4 can help quickly extract the charge stored in the first pin Q11, i.e., the base, thereby accelerating the turn-off speed of the transistor switch Q1.

[0046] In a specific embodiment, the second control circuit 40 includes a second control module IO3, a resistor R3, and a second protection loop 41, and two ends of the resistor R3 are connected to the second control module IO3 and the second protection loop 41 respectively.

[0047] Specifically, the second control module IO3 is also a part of the core control unit, responsible for controlling the charging process of the EL film 50 and the current control related to the EL film 50. The resistor R3 connects the second control module IO3 and the second protection circuit 41, and is used to adjust and limit the current flowing to the protection circuit to prevent excessive current from affecting the performance of the EL film 50. The second protection circuit 41 protects the EL film 50 and related electronic components in the event of circuit abnormality, and prevents damage by disconnecting the circuit or limiting the current.

[0048] Furthermore, when the power module 10 is started, a high level is output to the second control module IO3, the second protection circuit 41 is closed, and the first control circuit is disconnected. At this time, the voltage is superimposed and increased, and the cold light film 50 begins to be powered. The resistor R3 plays a role in regulating the current in this process to ensure that the power supply process is stable and without drastic fluctuations. In normal operation, the second protection circuit 41 is in a monitoring state. Once it is detected that the current or voltage exceeds the preset safety range, it intervenes immediately to prevent potential circuit damage by powering off or limiting the current. The rapid response of the second protection circuit 41 is the key to ensuring the long-term stable operation of the circuit and the cold light film 50.

[0049] In a specific embodiment, the second protection circuit 41 includes a resistor R6 and a transistor switch Q3, the transistor switch Q3 includes a fourth pin Q31, a fifth pin Q32 and a sixth pin Q33 connected to the cold light sheet 50, one end of the resistor R6 is connected between the fourth pin Q31 and the resistor R3, the other end of the resistor R6 is connected to the fifth pin Q32, and the fifth pin Q32 is grounded.

[0050] Specifically, the transistor switch Q3 is used as a control switch in the circuit, and its three pins are used to control and protect the circuit. The fourth pin Q31 is the base, the fifth pin Q32 is the emitter, and the sixth pin Q33 is the collector. The fourth pin Q31 (base) receives a control signal to determine whether the transistor switch Q3 is turned on. The fifth pin Q32 (emitter) is usually connected to the ground wire to complete the closed loop of the circuit. The sixth pin Q33 (collector) is connected to the inductor 20 to control the current passing through the cold light film 50. The transistor switch Q3 can quickly cut off the current connection with the cold light film 50, thereby protecting the safety of the cold light film 50 and the circuit. The resistor R6 is connected to the fourth pin Q31 and the fifth pin Q32 of the transistor switch Q3, that is, the resistor R6 is connected in parallel with the transistor switch Q3 to adjust the current from the fourth pin Q31 to the fifth pin Q32, thereby controlling the opening and closing of the transistor switch Q3.

[0051] Further, when the second control module IO3 outputs a high level, the transistor switch Q3 is in a closed state, allowing current to flow to the cold light film 50. When the transistor switch Q3 switches from the on state to the off state, the parallel resistor R6 can help to quickly extract the charge stored in the fourth pin Q31, i.e., the base, thereby accelerating the turn-off speed of the transistor switch Q3. When the current in the circuit exceeds the safe range, the resistor R3 will detect this abnormality and transmit a signal to the fourth pin Q31 of the transistor switch Q3 through the resistor R6. Affected by the current of the fourth pin Q31, the transistor switch Q3 responds to this change and cuts off the circuit by disconnecting the sixth pin Q33 (the collector connected to the cold light film 50) to prevent excessive current from flowing to the cold light film 50.

[0052] In a specific embodiment, the third control circuit 60 includes a third control module IO2, a resistor R2, and a third protection loop 61, and two ends of the resistor R2 are connected to the third control module IO2 and the third protection loop 61, respectively.

[0053] Specifically, the third control module IO2 is also part of the core control unit, and is responsible for controlling the discharge process of the EL sheet 50 and the current control related to the EL sheet 50. The resistor R2 connects the third control module IO2 and the third protection circuit 61, and is used to control and stabilize the current passing through the third protection circuit 61, prevent overcurrent, and reduce the risk and damage caused by current fluctuations. When the current or voltage is abnormal, the third protection circuit 61 protects the EL sheet 50 and related circuits from damage, and achieves protection by limiting current or disconnecting the circuit.

[0054] Furthermore, when the first control module IO1 outputs a low level, the first protection circuit 31 is turned on, the inductor 20 is charged, the second control module IO3 changes from a high level to a low level output, the second protection circuit 41 is disconnected, and the third control module IO2 outputs a high level, the third protection circuit 61 is turned on, and the cold light film 50 is discharged. During the discharge process, if the current or voltage exceeds the preset safety range, the third protection circuit 61 will immediately intervene, which may be to protect the cold light film 50 and other electronic components by limiting the current or completely disconnecting the circuit. The resistor R2 plays a key role in this process, ensuring that the current is stable and avoiding sudden current peaks that cause damage to the equipment.

[0055] In a specific embodiment, the third protection circuit 61 includes a resistor R5 and a transistor switch Q2, the transistor switch Q2 includes a seventh pin Q21, an eighth pin Q22 and a ninth pin Q23 connected to the inductor 20, one end of the resistor R5 is connected between the seventh pin Q21 and the resistor R2, the other end of the resistor R5 is connected to the eighth pin Q22, and the ninth pin Q23 is grounded.

[0056] Specifically, the transistor switch Q2 is used as a control switch in the circuit, and its three pins are used to control and protect the circuit. The seventh pin Q21 is the base, the eighth pin Q22 is the emitter, and the ninth pin Q23 is the collector. The seventh pin Q21 (base) receives a control signal to determine whether the transistor switch Q2 is turned on. The eighth pin Q22 (emitter) is usually connected to the ground wire to complete the closed loop of the circuit. The ninth pin Q23 (collector) is connected to the inductor 20 to control the current passing through the inductor 20. The resistor R5 is connected between the seventh pin Q21 and the eighth pin Q22, that is, the resistor R5 is connected in parallel with the transistor switch Q2, which is used to stabilize the base voltage and limit the current flowing to the base, and protect the transistor switch Q2 from current shock. When the transistor switch Q2 switches from the on state to the off state, the parallel resistor R5 can help quickly extract the charge stored in the seventh pin Q21, that is, the base, thereby accelerating the turn-off speed of the transistor switch Q2.

[0057] Furthermore, when the circuit operates normally, the transistor switch Q2 determines the conduction state according to the current received by the seventh pin Q21, i.e., the base, based on the high level output of the third control module IO2. The resistor R5 limits the current flowing to the seventh pin Q21 of the transistor switch Q2 to ensure that it operates within a safe range. When a circuit abnormality is detected, such as an overload of the inductor 20, the transistor switch Q2 will quickly cut off the current to prevent excessive current from flowing to subsequent circuit parts. The setting of the ninth pin Q23 being grounded helps to stabilize the circuit and quickly disconnect the current when necessary.

[0058] In a specific embodiment, the control circuit further includes a diode D1 , wherein the positive terminal of the diode D1 is connected to the inductor 20 , and the negative terminal of the diode D1 is connected to the cold light sheet 50 .

[0059] Specifically, the diode D1 is a freewheeling diode, the positive terminal of the diode D1 is connected to the inductor 20 to ensure that the diode D1 can receive current from the inductor 20, and the negative terminal is connected to the cold light film 50 to ensure that the current flows to the cold light film 50, but prevents any reverse current from flowing back to the inductor 20 or the power supply. When the inductor 20 is disconnected from the power supply, a high reverse electromotive force (reverse voltage) will be generated, and the reverse voltage may flow to and damage the sensitive cold light film 50. By installing a freewheeling diode, this high reverse voltage can be effectively prevented from reaching the cold light film 50, thereby protecting the cold light film 50 from damage.

[0060] Furthermore, when the circuit is activated and the power module 10 starts to charge the inductor 20, the current passes through the inductor 20 to supply power to the EL film 50. When the power is off or the control circuit changes state, the inductor 20 attempts to maintain the continuous flow of current, which will cause a reverse electromotive force to be generated at both ends of the inductor 20. The freewheeling diode prevents the reverse electromotive force generated by the inductor 20 from flowing back to the power module 10 or the EL film 50, and guides the current directly to the EL film 50, providing additional power supply and protecting the circuit at the same time.

[0061] In a specific embodiment, the control circuit further includes a capacitor C1 and a capacitor C2 , and the capacitor C1 and the capacitor C2 are connected between the inductor 20 and the power module 10 .

[0062] Specifically, capacitors C1 and C2 are configured between the inductor 20 and the power module 10, which provides a buffer and filter between the power supply and the inductor 20. Capacitors C1 and C2 can help filter high-frequency noise in the current provided by the power supply, reduce interference to the inductor 20 and subsequent circuit components, and temporarily store energy and release it when needed, thereby making the waveform smoother.

[0063] Furthermore, when the circuit is started or the power module 10 is powered, capacitors C1 and C2 begin to charge and store some energy. During the power supply process, if there is any high-frequency noise or interference, these capacitors act as filters to help smooth the current and provide a more stable power output. When the load in the circuit changes (such as the charge and discharge cycle of the inductor 20), capacitors C1 and C2 can respond quickly to provide the required additional current, avoid voltage drops, and maintain stable operation of the circuit.

[0064] In a specific embodiment, an electronic cigarette includes a housing, a circuit board disposed in the housing, and a control circuit 100 for lighting a cold light sheet 50 .

[0065] Since the control circuit 100 for lighting the cold light sheet 50 has been described in detail above, it will not be repeated here.

[0066] Thus, the control circuit 100 for lighting the cold light sheet 50 provided above realizes efficient conversion from a lower voltage to a required operating voltage by using the coordinated work of the power module 10, the inductor 20 and the control circuit. When the power module 10 is working, when the first control circuit 30 is connected to the inductor 20, the inductor 20 is charged. When the first control circuit 30 is disconnected from the inductor 20, the inductor 20 generates a reverse electromotive force. By repeatedly switching the first control circuit 30 on and off, the voltage is increased, and the cold light sheet 50 is cyclically charged and discharged. An alternating voltage is generated at both ends of the cold light sheet 50. Different voltage values ​​and frequencies can obtain different brightness colors. Thus, efficient use of energy is achieved, the number of components in the circuit is reduced, the circuit design is simplified, and the manufacturing cost of the product is reduced.

[0067] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A control circuit for lighting a cold light sheet, characterized in that: include: A power module, an inductor, a first control circuit, a second control circuit, a cold light sheet and a third control circuit; The two ends of the inductor are respectively connected to the power module and the first control circuit, so that when the first control circuit is connected to the inductor, the power module charges the inductor, and when the first control circuit is disconnected, the inductor generates a reverse electromotive force; Two ends of the cold light sheet are respectively connected to the inductor and the second control circuit, so that when the first control circuit is disconnected and the third control circuit is connected to the cold light sheet, the power module is used to charge the cold light sheet; The third control circuit is connected to the EL sheet and is used for causing the EL sheet to discharge when the first control circuit is turned on and the second control circuit is turned off.

2. A control circuit for lighting up a cold light sheet according to claim 1, characterized in that: The first control circuit includes a first control module, a resistor R1, and a first protection loop. Two ends of the resistor R1 are connected to the first control module and the first protection loop respectively.

3. A control circuit for lighting up a cold light sheet according to claim 2, characterized in that: The first protection loop includes a resistor R4 and a transistor switch Q1, the transistor switch Q1 includes a first pin, a second pin and a third pin connected to the inductor, one end of the resistor R4 is connected between the first pin and the resistor R1, the other end of the resistor R4 is connected to the second pin, and the second pin is grounded.

4. The control circuit for lighting up a cold light sheet according to claim 1, characterized in that: The second control circuit includes a second control module, a resistor R3, and a second protection loop. Two ends of the resistor R3 are connected to the second control module and the second protection loop respectively.

5. The control circuit for lighting up a cold light sheet according to claim 1, characterized in that: The second protection circuit includes a resistor R6 and a transistor switch Q3, the transistor switch Q3 includes a fourth pin, a fifth pin and a sixth pin connected to the cold light sheet, one end of the resistor R6 is connected between the fourth pin and the resistor R3, the other end of the resistor R6 is connected to the fifth pin, and the fifth pin is grounded.

6. A control circuit for lighting up a cold light sheet according to claim 1, characterized in that: The third control circuit includes a third control module, a resistor R2, and a third protection loop. Two ends of the resistor R2 are connected to the third control module and the third protection loop respectively.

7. A control circuit for lighting up a cold light sheet according to claim 1, characterized in that: The third protection loop includes a resistor R5 and a transistor switch Q2, the transistor switch Q2 includes a seventh pin, an eighth pin and a ninth pin connected to the inductor, one end of the resistor R5 is connected between the seventh pin and the resistor R2, the other end of the resistor R5 is connected to the eighth pin, and the ninth pin is grounded.

8. The control circuit for lighting up a cold light sheet according to claim 1, characterized in that: A diode is also included, wherein a positive terminal of the diode is connected to the inductor, and a negative terminal of the diode is connected to the cold light sheet.

9. The control circuit for lighting up a cold light sheet according to claim 1, characterized in that: It also includes a capacitor C1 and a capacitor C2, wherein the capacitor C1 and the capacitor C2 are connected between the inductor and the power module.

10. An electronic cigarette, characterized in that: The invention comprises a housing, a circuit board arranged in the housing, and a control circuit for lighting up the cold light sheet as claimed in any one of claims 1 to 9.

Images