WO2022241645A1

WO2022241645A1 - Sensing apparatus, driving circuit of electronic atomization apparatus, and electronic atomization apparatus

Info

Publication number: WO2022241645A1
Application number: PCT/CN2021/094402
Authority: WO
Inventors: 周军; 方伟明; 周庆良
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-11-24

Abstract

A sensing apparatus (13), a driving circuit (80) of an electronic atomization apparatus (90), and the electronic atomization apparatus (90). The sensing apparatus (13) comprises: a main control unit (131) used for outputting a first control signal; and a boosting unit (132) connected to the main control unit (131) and used for boosting, by using the first control signal, a power supply voltage (VI) provided by a power supply device (12) so as to generate a driving voltage (V2), the driving voltage (V2) being the voltage for driving a light-emitting element (11) to emit light, and the power supply voltage (VI) being lower than a turn-on voltage of the light-emitting element (11). Thus, light emission of the light-emitting element (11) can be ensured.

Description

Sensing device, driving circuit of electronic atomization device, and electronic atomization device

technical field

The invention relates to the technical field of electronic atomization, in particular to a sensing device, a driving circuit of the electronic atomization device and the electronic atomization device.

Background technique

In the prior art, when the sensing device detects a change in the airflow, it controls the power supply device to supply power. However, during the power supply process of the power supply device, there is a situation that the light emitting element cannot emit light stably.

Contents of the invention

The invention provides a sensing device, a driving circuit of the electronic atomization device and the electronic atomization device, which can ensure that the light-emitting element emits light.

In order to solve the above technical problems, the first technical solution provided by the present invention is to provide a sensing device, including: a main control unit for outputting a first control signal; a lifting unit connected to the main control unit for The first control signal is used to raise the power supply voltage provided by the power supply device to generate a driving voltage; the driving voltage is a voltage for driving the light emitting element to emit light, and the power supply voltage is lower than the conduction voltage of the light emitting element.

Wherein, the main control unit includes: a sensor, which is used to connect to the airway; a main controller, which is connected to the sensor, and is used to output the first control signal according to the airflow change detected by the sensor.

Wherein, the sensing device further includes: a substrate with a first air hole for connecting the airway, the sensor is located on the first surface of the substrate and is arranged corresponding to the first air hole; the housing is located on the first surface of the substrate and Surrounding the sensor and the main controller, the casing has a second air hole for connecting to a reference air pressure; wherein, the sensor detects whether there is an airflow change based on the air pressure of the airway and the reference air pressure.

Wherein, the sensor and the main controller are packaged as an independent component, and the lifting unit is set independently from the packaged sensor and the main controller; or, the main controller and the sensor and the lifting unit is packaged as a separate component.

Wherein, the sensing device is a MEMS sensor or a microphone.

In order to solve the above technical problems, the second technical solution provided by the present invention is to provide a drive circuit for an electronic atomization device, including: a light-emitting element; a power supply device, which provides a power supply voltage; a sensing device, which is connected to the power supply device and The light-emitting element, wherein the sensing device sends a first control signal, and the first control signal is used to raise the supply voltage to generate a driving voltage, so as to drive the light-emitting element with the driving voltage; wherein, The supply voltage is lower than the conduction voltage of the light emitting element.

Wherein, the power supply voltage provided by the power supply device ranges from 1.6 to 3.6V, and the first control signal raises the power supply voltage to a range of 1V to 3.2V, so that the minimum value of the generated driving voltage Matching the conduction voltage of the light emitting element ensures that the driving voltage can drive the light emitting element to work.

Wherein, the sensing device further sends a second control signal to the circuit where the light-emitting element and the power supply device are located, so as to adjust the voltage difference between the two ends of the light-emitting element to drive whether the light-emitting element emits light; wherein, when the When the second control signal is in a logic high state, the light emitting element is not emitting light; when the second control signal is in a logic low state, the light emitting element is emitting light.

Wherein, the sensing device includes: a main control unit, configured to detect whether there is an airflow change, and output the first control signal and the second control signal when there is an airflow change; a lifting unit, connected to the power supply device and The main control unit is configured to use the first control signal to increase the power supply voltage to generate the driving voltage, so as to drive the light emitting element with the driving voltage.

Wherein, the working voltage of the main control unit matches the power supply voltage range of the power supply device so as to work normally under the power supply voltage provided by the power supply device.

Wherein, the lifting unit includes: a first unidirectional conductor, the first end of which is connected to the power supply device to receive the power supply voltage; a first capacitor, a first capacitor of the first capacitor One end is connected to the main control unit to receive the first control signal, and the second end of the first capacitor is connected to the second end of the first unidirectional conducting member, wherein the first capacitor and the The first node between the first unidirectional conductors is used as the first output terminal of the sensing device to output the driving voltage; wherein, the main control unit further includes a switch output terminal to output the second control signal , the light emitting element is connected between the first output terminal and the switch output terminal.

Wherein, the frequency of the first control signal is greater than 50 Hz.

Wherein, the lifting unit includes: a first unidirectional conductor, the first end of which is connected to the power supply device to receive the power supply voltage; a first capacitor, a first capacitor of the first capacitor One end is connected to the main control unit to receive the first control signal, the second end of the first capacitor is connected to the second end of the first unidirectional conductor; the second unidirectional conductor, the first The first end of the two unidirectional conducting members is connected to the second end of the first unidirectional conducting member; the second capacitor, the first end of the second capacitor is connected to the second end of the second unidirectional conducting member, The second terminal of the second capacitor is grounded, wherein the first node between the second capacitor and the second unidirectional conducting member is used as the first output terminal of the sensing device to output the driving voltage ; Wherein, the main control unit further includes a switch output terminal to output the second control signal, and the light emitting element is connected between the first output terminal and the switch output terminal.

The lifting unit includes: an inductor, the first end of the inductor is connected to the power supply device to receive the power supply voltage; a first switch, the control end of the first switch is connected to the main control unit to receive the first A control signal, the first path end of the first switch is connected to the other end of the inductor, the second path end of the first switch is grounded; the first unidirectional conducting element, the first unidirectional conducting element The first end is connected to the second end of the inductor; the first capacitor, the first end of the first capacitor is connected to the second end of the first unidirectional conducting member, wherein the first capacitor and the first capacitor are connected to the second end of the first capacitor. A first node between a unidirectional conducting element is used as a first output terminal of the sensing device to output the driving voltage; the main control unit further includes a switch output terminal to output the second control signal, the The second end of the first capacitor is connected to the switch output end, and the light emitting element is connected between the first output end and the switch output end.

Wherein, the lifting unit includes: a first resistor, the first end of the first resistor is connected to the first node; a second resistor, the first end of the second resistor is connected to the second node of the first resistor. terminal, the second terminal of the second resistor is connected to the switch output terminal; wherein, the main control unit further includes a feedback terminal, and the feedback terminal is connected to the fourth node between the first resistor and the second resistor, so as to detecting the driving voltage, and adjusting the duty cycle of the first control signal.

Wherein, the first control signal is a timing pulse signal.

In order to solve the above-mentioned technical problems, the second technical solution provided by the present invention is to provide an electronic atomization device, including the drive circuit of any one of the above-mentioned electronic atomization devices.

The beneficial effect of the present invention is different from the prior art. The present invention provides a lifting unit in the sensing device, and generates a driving voltage capable of driving the light-emitting element to emit light through the lifting unit raising the power supply voltage provided by the power supply device, so as to solve the problem of existing problems. The problem that light-emitting elements cannot emit light in technology.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work, wherein:

Fig. 1 is a functional module schematic diagram of an embodiment of the sensing device of the present invention;

Fig. 2 is a schematic structural view of an embodiment of the sensing device shown in Fig. 1;

Fig. 3 is a schematic diagram of a discharge test curve of a low-voltage battery;

4 is a schematic structural diagram of the first embodiment of the driving circuit of the electronic atomization device of the present invention;

5 is a schematic structural diagram of a second embodiment of the drive circuit of the electronic atomization device of the present invention;

FIG. 6 is a schematic structural diagram of a first embodiment of the drive circuit of the electronic atomization device shown in FIG. 5;

FIG. 7 is a schematic structural diagram of another embodiment of the drive circuit of the electronic atomization device shown in FIG. 5;

Fig. 8 is a schematic structural diagram of a second embodiment of the drive circuit of the electronic atomization device shown in Fig. 5;

FIG. 9 is a schematic structural diagram of a third embodiment of the driving circuit of the electronic atomization device shown in FIG. 5;

Fig. 10 is a schematic structural diagram of a fourth embodiment of the drive circuit of the electronic atomization device shown in Fig. 5;

Fig. 11 is a schematic structural diagram of an embodiment of the electronic atomization device of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In reality, electronic atomization devices generally use general-purpose lithium batteries for power supply. The rated voltage of ordinary lithium batteries is 3.7V, and the output voltage is 2.5V to 4.2V. The pumpable times of the chemical device is greatly restricted. After research, the inventor found that under the same volume, the energy density of low-voltage batteries is higher, and the capacity of ordinary lithium batteries is lower than that of low-voltage batteries. Therefore, this application uses low-voltage batteries for power supply. However, since the rated voltage of the low-voltage battery can be, for example, 2.8V, and the corresponding output voltage is 1.6V-3.6V, it cannot stably drive the light-emitting elements on the electronic atomization device, so in reality, it is usually not possible in the field of electronic atomization. Use low-voltage batteries instead of ordinary lithium batteries. However, in order to increase the number of suction ports, this application uses a low-voltage battery for power supply, and to ensure that the light-emitting element can emit light stably, this application proposes a new type of sensing device, please refer to Figure 1 for details.

Specifically, FIG. 1 is a block diagram of an embodiment of a sensing device of the present application. The sensing device includes a main control unit 1 and a lifting unit 2 . Wherein, the main control unit 1 is used to output the first control signal. Specifically, the main control unit 1 detects whether there is a change in airflow, and outputs a first control signal when there is a change in airflow. In an embodiment, the sensing device can be applied in the field of electronic atomization devices. The main control unit 1 is connected to the airway of the electronic atomization device. For example, when the user is inhaling, the sensing device detects the change of the airflow in the airway and outputs a first control signal. The raising unit 2 uses the first control signal to raise the power supply voltage provided by the power supply device to generate a driving voltage, and the driving voltage can drive the light-emitting element to emit light.

When the sensing device described in this embodiment is applied to an electronic atomization device, it can support the electronic atomization device to choose to use a low-voltage battery, for example, a low-voltage battery with a rated voltage of 2.8V and an output voltage of 1.6V-3.6V Provide power supply to increase the puffing times of the electronic atomization device; and due to the application of the sensor device of this embodiment, it can ensure that the light-emitting element emits light.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of the sensing device shown in FIG. 1 . The main control unit 1 includes a sensor 31 and a main controller 32 . The sensor 31 is connected to the airway, and the main controller 32 is connected to the sensor 31 for outputting a first control signal according to the change of air flow detected by the sensor 31 . The raising unit 2 raises the power supply voltage provided by the power supply device based on the first control signal to generate a driving voltage, and the driving voltage can drive the light emitting element to emit light. Specifically, the supply voltage is lower than the conduction voltage of the light emitting element.

In this embodiment, the lifting unit 2 can be integrated on the main controller 32 .

The sensing device further includes: a base plate 35 and a housing 36, wherein the base plate 35 has a first air hole 33 for connecting the airway. The sensor 31 is located on the first surface of the substrate 35 and is disposed corresponding to the first air hole 33 . Specifically, one end of the sensor 31 is located on one side of the first air hole 33 , and the other end of the sensor 31 is located on the other side of the first air hole 33 . The housing 36 is located on the first surface of the base plate 35 and is disposed around the sensor 31 and the main controller 32 . The housing 36 has a second air hole 34 for connecting to the reference air pressure P0. Wherein, the sensor 31 is electrically connected to the main controller 32 through metal wires, and the main controller 32 is electrically connected to the substrate 35 through metal wires. In one embodiment, the substrate 35 is a circuit board.

The sensor 31 detects whether there is an airflow change based on the air pressure P of the airway and the reference air pressure P0. When there is a suction action, the air pressure of the airway is P, and the sensor 31 detects the airflow change through the first vent hole 33 as ΔP=P-P0, and the airflow difference ΔP can change the capacitance distance of the sensor 31, so that the capacitance occurs change, the main controller 32 outputs the first control signal according to the change of the capacitance value. The raising unit 2 raises the power supply voltage provided by the power supply device based on the first control signal to generate a driving voltage, and the driving voltage can drive the light emitting element to emit light.

In one embodiment, the sensor 31 and the main controller 32 are packaged as an independent component, and the lifting unit 2 is set independently from the packaged sensor 31 and the main controller 32 . In one embodiment, the lifting unit 2 , the packaged sensor 31 and the main controller 32 are respectively arranged on the circuit board. Or in another embodiment, the main controller 32, the sensor 31 and the lifting unit 2 are packaged as an independent component.

In one embodiment, the sensing device is a MEMS sensor.

When the sensing device described in this embodiment is applied to an electronic atomization device, it can support the electronic atomization device to select a low-voltage battery such as a power supply device with a rated voltage of 2.8V and an output voltage of 1.6V-3.6V for power supply. , to increase the number of puffs available for the electronic atomization device; and due to the application of the sensing device of this embodiment, it is possible to ensure that the light-emitting element emits light.

In reality, electronic atomization devices generally use general-purpose lithium batteries for power supply. The rated voltage of ordinary lithium batteries is 3.7V, and the output voltage is 2.5V to 4.2V. The pumpable times of the chemical device is greatly restricted. After research, the inventor found that under the same volume, the energy density of low-voltage batteries is higher, and the capacity of ordinary lithium batteries is lower than that of low-voltage batteries. Therefore, this application uses low-voltage batteries for power supply. However, since the rated voltage of the low-voltage battery is 2.8V and the output voltage is 1.6V to 3.6V, when the supply voltage of the low-voltage battery is lower than 2.6V, white, blue, and green lights cannot be directly lit. component problem. The main reason is that the luminous color of the light-emitting element is determined by the bandgap characteristics of the P-N junction material, and the forward voltage is doped with different elements into the P-N junction, which changes the turn-on voltage of the P-N junction. Generally, the turn-on voltage of low-power light-emitting elements such as red, yellow, orange, and yellow-green is 1.8-2.4V, and the turn-on voltage of green, blue, and white is 2.6-3.6V. Please refer to Figure 3. Figure 3 is a discharge curve diagram of a low-voltage battery. During the discharge process of a low-voltage battery, the power supply voltage will be lower than 2.6V. At this time, the power supply voltage cannot drive the green, blue, and white light-emitting elements to emit light, so Low-voltage batteries cannot stably drive the light-emitting elements on the electronic atomization device, so in reality, low-voltage batteries are usually not used in the field of electronic atomization, but ordinary lithium batteries are used. However, in order to increase the number of suction ports, this application uses a low-voltage battery for power supply, and designs a driving circuit that can also light up the light on the electronic atomization device when the low-voltage battery is used for power supply. element.

For details, please refer to FIG. 4 , which is a schematic structural diagram of the first embodiment of the driving circuit of the electronic atomization device of the present invention. Specifically, the driving circuit includes a light emitting element 11 , a power supply device 12 and a sensing device 13 . In one embodiment, the sensing device is a MEMS sensor or a microphone.

Wherein, the power supply device 12 provides a power supply voltage V1, and the sensing device 13 is connected to the power supply device 12 and the light emitting element 11, wherein the sensing device 13 sends out a first control signal, and the first control signal is used to raise the power supply voltage V1 to generate a driving voltage V2 , so that the light emitting element 11 is driven to emit light by using the driving voltage V2. In a specific embodiment, the first control signal is a PWM signal. In one embodiment, the first control signal is a timing pulse signal.

Wherein, the supply voltage V1 is lower than the conduction voltage of the light emitting element 11 . Specifically, the rated power supply voltage of the power supply device 12 is 2.8V, and the power supply voltage V1 ranges from 1.6V to 3.6V. Using the power supply device 12 to supply power can increase the number of puffs available for the electronic atomization device. However, the applicant found through research that the power supply device 12 cannot stably make the light emitting element 11 emit light. Therefore, the sensing device 13 provided by the present invention is applied to this embodiment, and the sensing device 13 is used to send a first control signal when the airflow change is detected. The first control signal is a time sequence pulse signal, and the sensing device 13 uses The first control signal is used to raise the power supply voltage V1 to generate a driving voltage V2, and then the light emitting element 11 is driven to emit light by using the driving voltage V2.

Specifically, the first control signal raises the power supply voltage V1 to a range of 1V to 3.2V, so that the minimum value of the generated driving voltage V2 matches the minimum value of the operating voltage of the light-emitting element 11, ensuring that the driving voltage V2 can drive the light-emitting element 11 to work. , and prevent the driving voltage V2 from being too large to burn the light-emitting element 11 . The power supply device 12 provides a power supply voltage V1, the rated power supply voltage of the power supply device 12 is 2.8V, and its power supply voltage V1 ranges from 1.6V to 3.6V, and the light emitting element 11 usually works between 2.6V to 3.6V, so the power supply device 12 The provided supply voltage V1 cannot stably drive the light-emitting element 11 to work normally, but the gap between the two is not large, and the electronic atomization device does not need to light the light-emitting element for a long time, it only needs to briefly Light up the light emitting element. Therefore, the electronic atomization device does not need to set up a complex circuit to boost the power supply voltage V1 and maintain the boosted high voltage for a long time. The electronic atomization device of this application uses the first control signal of the PWM signal to realize the The small-scale rise and short-term rise of the power supply voltage V1 only need to raise the power supply voltage V1 by 1V to 3.2V in a short period of time, so as to ensure that the light-emitting element 11 can be stably driven to work in a short pumping time and prevent the driving If the voltage V2 is too high, the light-emitting element 11 will be burned. In order to ensure that the light emitting element 11 can emit light, the first control signal raises the power supply voltage V1 to the driving voltage V2, and the minimum value of the driving voltage V2 is the minimum value of the working voltage of the light emitting element 11 .

In one embodiment, the sensing device 13 further sends a second control signal to the circuit where the light-emitting element 11 and the power supply device 12 are located, so as to adjust the voltage difference between the two ends of the light-emitting element 11 to drive the light-emitting element 11 to emit light; wherein, when the second When the control signal is in a logic high state, the light emitting element 11 is not emitting light; when the second control signal is in a logic low state, the light emitting element 11 is emitting light.

In this embodiment, the driving circuit of the electronic atomization device uses a power supply device 12 with a rated power supply voltage of 2.8V and a power supply voltage range of 1.6V to 3.6V for power supply. Due to the same volume, the battery capacity of the power supply device 12 of this application It is higher than ordinary batteries with a rated voltage of 3.7V and an output voltage of 2.5V-4.2V, so using the power supply device 12 of the present application for power supply can increase the number of suction ports. Further, since the rated power supply voltage is 2.8V, and the power supply device 12 with a power supply voltage range of 1.6V to 3.6V cannot light up the light emitting element 11, the application provides a sensing device 13, and the sensing device 13 outputs a first control signal to The power supply voltage V1 provided by the power supply device 12 is raised to the driving voltage V2, thereby making the light emitting element 11 emit light.

Please refer to FIG. 5 , which is a schematic structural diagram of a second embodiment of the drive circuit of the electronic atomization device of the present invention. Compared with the first embodiment shown in FIG. 1 , this embodiment differs in that: in this embodiment, the sensing device 13 includes a main control unit 131 and a lifting unit 132 .

Wherein, the main control unit 131 outputs the first control signal and the second control signal. The raising unit 132 is connected to the power supply device 12 and the main control unit 131 to use the first control signal to raise the power supply voltage V1 to generate the driving voltage V2 so as to drive the light-emitting element 11 with the driving voltage V2. Specifically, the first control signal raises the power supply voltage V1 to a range of 1V to 3.2V, so that the minimum value of the generated driving voltage V2 matches the minimum value of the operating voltage of the light-emitting element 11, ensuring that the driving voltage V2 can drive the light-emitting element 11 to work. . The rated power supply voltage of the power supply device 12 is 2.8V, and its power supply voltage V1 ranges from 1.6V to 3.6V, and the light emitting element 11 usually works between 2.6V to 3.6V, so the power supply voltage V1 provided by the power supply device 12 cannot be stably Drive the light-emitting element 11 to work normally, but the difference between the two is not large, and the electronic atomization device does not need to light up the light-emitting element for a long time, it only needs to light up the light-emitting element 11 briefly when inhaling. Therefore, The electronic atomization device does not need to set up a complex circuit to boost the power supply voltage V1 and maintain the boosted high voltage for a long time. The electronic atomization device of this application uses the first control signal of the PWM signal to realize the control of the power supply voltage V1. The small-scale and short-term rise of V1 only needs to raise the power supply voltage V1 by 1V-3.2V in a short time, so as to ensure that the light-emitting element 11 can be stably driven to work within a short pumping time. In order to ensure that the light emitting element 11 can emit light, the first control signal raises the power supply voltage V1 to the driving voltage V2, and the minimum value of the driving voltage V2 is the minimum value of the working voltage of the light emitting element 11 .

Specifically, in this embodiment, the working voltage of the main control unit 131 matches the range of the power supply voltage V1 of the power supply device 12 so as to work normally under the power supply voltage V1 provided by the power supply device 12 .

In this embodiment, the driving circuit of the electronic atomization device uses a power supply device 12 with a rated power supply voltage of 2.8V and a power supply voltage range of 1.6V to 3.6V for power supply. Due to the same volume, the battery capacity of the power supply device 12 of this application It is higher than ordinary batteries with a rated voltage of 3.7V and an output voltage of 2.5V-4.2V, so using the power supply device 12 of the present application for power supply can increase the number of suction ports. Furthermore, since the rated power supply voltage is 2.8V, the power supply device 12 with a power supply voltage range of 1.6V-3.6V cannot light the light-emitting element 11. This application sets a lifting unit 132 and a main control unit 131. The lifting unit 132 is set according to the main control unit. The first control signal output by 131 raises the power supply voltage V1 provided by the power supply device 12 to the driving voltage V2, thereby making the light emitting element 11 emit light.

Please refer to FIG. 6 , which is a schematic structural diagram of an embodiment of the driving circuit of the electronic atomization device shown in FIG. 5 . In this embodiment, the lifting unit 132 includes a first unidirectional conductor D1 and a first capacitor C1. Wherein, the first end of the first unidirectional conductor D1 is connected to the power supply device 12 to receive the power supply voltage V1. A first end of the first capacitor C1 is connected to the first port A of the main control unit 131 to receive the first control signal P1, and a second end of the first capacitor C1 is connected to the second end of the first unidirectional conductive member D1. Wherein, the first node n1 between the first capacitor C1 and the first unidirectional conducting member D1 is used as the first output terminal n1 of the sensing device 13 to output the driving voltage V2. The main control unit 131 further includes a switch output terminal B to output a second control signal P3, and the light emitting element 11 is connected between the first output terminal n1 and the switch output terminal P2. Specifically, as shown in FIG. 4 , the lifting unit 132 further includes a third resistor R3 , the first terminal of the third resistor R3 is connected to the switch output terminal P2 , and the second terminal of the first resistor is connected to the light emitting element 11 .

Specifically, in this embodiment, the main control unit 131 may be an ASIC, an MCU, an MCU with a Bluetooth function, or the like. The first port A of the main control unit 131 outputs a first control signal P1 to increase the supply voltage V1 provided by the power supply device 12 to the driving voltage V2. Wherein, the first unidirectional conduction element D1 is used to prevent voltage from pouring back, the first capacitor C1 is used to store electric energy, and the third resistor R3 is used to limit the current of the light emitting element 11 . Specifically, the first control signal P1 is a PWM signal. When the first control signal P1 is at a low level, under the premise that the voltage drop of the light-emitting element 11 is ignored, the voltage Vn1=V1 at the first node n1, and V1 is the power supply voltage , its range is 1.6V ~ 3.6V. When the first control signal P1 is at a high level, the voltage Vn2 at the second node n2 is superimposed on the voltage across the first capacitor C1, and the voltage at the first node n1 at this time is Vn1=V1+Vn2, wherein the second node n2 The voltage Vn2 at node n1 is the voltage when the first control signal P1 is at a high level, and the voltage Vn1=V1+Vn2 at the first node n1 is the driving voltage V2, and the light-emitting element 11 is powered by the driving voltage V2.

In one embodiment, the frequency of the first control signal P1 is greater than 50 Hz, which can prevent human eyes from distinguishing flashing lights. It can be understood that the signal at the second node n2 at the left end of the first capacitor C1 is a PWM signal, and the signal at the first node n1 at the right end of the first capacitor C1 is still a PWM signal. When the first control signal P1 is at a low level, the light emitting element 11 cannot emit light. The light-emitting element 11 can emit light only when the first control signal P1 is at a high level. In order to make the light-emitting element 11 always in a light-emitting state, the frequency of the first control signal P1 is set to be greater than 50HZ.

Further, in this embodiment, the main control unit 131 further outputs the second control signal P3 to the circuit where the light-emitting element 11 and the power supply device 12 are located through the switch output terminal B, so as to adjust the voltage difference between the two ends of the light-emitting element 11 and drive the light-emitting element 11 Is it glowing. Specifically, when the second control signal P3 is in a logic high state, the light emitting element 11 does not emit light, and when the second control signal P3 is in a logic low state, the light emitting element 11 emits light. The voltage range in which the second control signal is in a logic high state is 0.3V˜0.7V, and the voltage range in which the second control signal is in a logic low state is −0.2V˜0V.

As shown in Figure 6, in this embodiment, the lifting unit 132 and the main control unit 131 are independent units. In another embodiment, the lifting unit 132 can also be integrated on the main control unit 131, that is, the main control unit 131 and the lifting unit 132 are packaged as an independent device unit, as shown in FIG. 7 .

The driving circuit of this embodiment uses the first control signal P1 with a frequency greater than 50 Hz to quickly charge and discharge the first capacitor C1, thereby realizing a power supply device with a rated power supply voltage of 2.8V and a power supply voltage range of 1.6V to 3.6V 12 to drive the light emitting element 11 to emit light.

Please refer to FIG. 8 , which is a schematic structural diagram of a second embodiment of the driving circuit of the electronic atomization device shown in FIG. 5 . In this embodiment, the lifting unit 132 includes: a first unidirectional conductor D1 , a first capacitor C1 , a second unidirectional conductor D2 and a second capacitor C2 . Wherein, the first end of the first one-way conducting element D1 is connected to the power supply device 12 to receive the power supply voltage V1. A first end of the first capacitor C1 is connected to the first port A of the main control unit 131 to receive the first control signal P1, and a second end of the first capacitor C1 is connected to the second end of the first unidirectional conductive member D1. The first end of the second unidirectional conductor D2 is connected to the second end of the first unidirectional conductor D1, and the connection point between the first end of the second unidirectional conductor D2 and the second end of the first unidirectional conductor D1 is The third node n3. A first end of the second capacitor C2 is connected to a second end of the second unidirectional conducting member D2, and a second end of the second capacitor C2 is grounded. The first node n1 between the second capacitor C2 and the second unidirectional conducting element D2 is used as the first output terminal of the control circuit to output the driving voltage V2. In this embodiment, the main control unit 131 further includes a switch output terminal B to output the second control signal P3, and the light emitting element 11 is connected between the first output terminal (namely the first node n1) and the switch output terminal B. In this embodiment, the lifting unit 132 further includes a third resistor R3, the first end of the third resistor R3 is connected to the switch output terminal B, and the second end of the third resistor R3 is connected to the light emitting element 11 .

In this embodiment, the first unidirectional conductor D1 and the second unidirectional conductor D2 are used to prevent voltage backfeeding, and the first capacitor C1 and the second capacitor C2 are used to store electric energy. When the first control signal P1 is at low level, the voltage Vn3 at the third node n3=V1, V1 is the power supply voltage, and the voltage Vn3 at the third node n3 charges the second capacitor C2 through the second unidirectional conducting element D2. When the first control signal P1 is a high-level signal, the voltage Vn2 at the second node n2 is superimposed on the voltage across the first capacitor C1, and the second capacitor C2 is charged through the second unidirectional conductive element D2, and the light-emitting element 11 Provide the driving voltage V2. At this time, the voltage across the second capacitor C2 is the driving voltage V2=VCC+Vn2, where Vn2 is the voltage when the first control signal P1 is a high-level signal. In this embodiment, due to the existence of the second capacitor C2, the voltage at the first node n1, that is, the waveform of the driving voltage V2 is relatively stable, basically in a straight line, so the frequency of the first control signal P1 is not required to be greater than 50 Hz.

Please refer to FIG. 9 , which is a schematic structural diagram of a third embodiment of the drive circuit of the electronic atomization device shown in FIG. 5 . In this embodiment, the lifting unit 132 includes: an inductor L, a first switch Q1 , a first unidirectional conducting element D1 and a first capacitor C1 . Wherein, the first end of the inductor L is connected to the power supply device 12 to receive the power supply voltage V1. The control end of the first switch Q1 is connected to the first port A of the main control unit 131 to receive the first control signal P1, the first path end of the first switch Q1 is connected to the second end of the inductor L, and the second path of the first switch Q1 end grounded. A first end of the first unidirectional conductor D1 is connected to a second end of the inductor L. The first end of the first capacitor C1 is connected to the second end of the first unidirectional conducting element D1, wherein the first node n1 between the first capacitor C1 and the first unidirectional conducting element D1 serves as the first output end of the control circuit To output the driving voltage V2. In this embodiment, the main control unit 131 further includes a switch output terminal B to output the second control signal P3, the second terminal of the first capacitor C1 is connected to the switch output terminal B, and the light emitting element 11 is connected to the first output terminal (that is, the first between node n1) and switch output B. Specifically, the lifting unit 132 in this embodiment further includes a third resistor R3, the first terminal of the third resistor R3 is connected to the switch output terminal B, and the second terminal is connected to the light emitting element 11 .

Specifically, in this embodiment, the first switch Q1 is turned on according to the first control signal P1, and when the first switch Q1 is turned on, the supply voltage V1 is charged through the inductor L, the first switch Q1 and the first capacitor C1, and then With the process of continuous charging, the current on the inductor L increases linearly. After a certain period of time, the inductor stores enough energy. 11 provides a driving voltage V2 to control the light emitting element 11 to emit light. When the first switch Q1 is not turned on, the first switch Q1 is turned off. Since the inductance L has a reverse electromotive force, the current of the inductance L cannot suddenly change suddenly, but will gradually discharge. Since the first switch Q1 is turned off, the inductance L will discharge through the loop where the first unidirectional conduction element D1, the light emitting element 11 and the first capacitor C1 are located, that is, the inductance L charges the first capacitor C1, because the first capacitor C1 has provided a voltage before the inductor L is charged, so the voltage across the first capacitor C1 increases, and then provides the driving voltage V2 for the light emitting element 11 to drive the light emitting element 11 to emit light.

Please refer to FIG. 10 , which is a schematic structural diagram of a fourth embodiment of the driving circuit of the electronic atomization device shown in FIG. 5 . Compared with the third embodiment shown in FIG. 7 , this embodiment differs in that the main control unit 131 of this embodiment further includes a feedback terminal C. As shown in FIG. The lifting unit 132 further includes a first resistor R1 and a second resistor R2. Wherein, the first terminal of the first resistor R1 is connected to the first node n1, the first terminal of the second resistor R2 is connected to the second terminal of the first resistor R1, and the second terminal of the second resistor R2 is connected to the switch output terminal B. Specifically, the lifting unit 132 also includes a third resistor R3, the first end of the third resistor R3 is connected to the switch output terminal B to receive the second control signal P3, and the second end of the third resistor R3 is connected to the second end of the second resistor R2. terminal and light-emitting element 11.

In this embodiment, the feedback terminal C of the main control unit 131 detects the voltage at the fourth node n4, and then adjusts the duty ratio of the first control signal P1 according to the voltage at the fourth node n4, thereby adjusting the voltage of the driving voltage V2 value.

That is to say, in the embodiment shown in FIG. 9 , the voltage value of the driving voltage V2 is fixed, but in the embodiment shown in FIG. 10 , the voltage value of the driving voltage V2 is adjustable.

In the above embodiments of the present application, a low-voltage battery is used for power supply, and a driving circuit is designed, which can enable the light-emitting element on the electronic atomization device to be turned on when the low-voltage battery is used for power supply.

Please refer to FIG. 11 , which is a schematic structural diagram of an embodiment of the electronic atomization device of the present invention. Specifically, the electronic atomization device 90 of the present invention includes the drive circuit 80 of the electronic atomization device of any one of the above-mentioned embodiments. In an embodiment, the driving circuit 80 of the above-mentioned electronic atomization device may be disposed at the end of the battery rod of the electronic atomization device 90 . Alternatively, in another embodiment, the above-mentioned drive circuit 80 of the electronic atomization device may also be disposed at the atomizer end of the electronic atomization device 90 , which is not specifically limited.

The above is only the embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, All are included in the scope of patent protection of the present invention in the same way.

Claims

A sensing device, comprising:

a main control unit, configured to output a first control signal;

The lifting unit is connected to the main control unit, and is used to use the first control signal to raise the power supply voltage provided by the power supply device to generate a driving voltage; the driving voltage is a voltage for driving the light-emitting element to emit light, and the power supply voltage is lower than the The conduction voltage of the above-mentioned light-emitting element.
The sensing device according to claim 1, wherein the main control unit comprises:

sensor for connection to the airway;

A main controller, connected to the sensor, configured to output the first control signal according to the change of the airflow detected by the sensor.
The sensing device according to claim 2, wherein the sensing device further comprises:

a substrate, the substrate has a first vent hole for connecting to an airway, the sensor is located on the first surface of the substrate, and is arranged corresponding to the first vent hole;

A casing, located on the first surface of the substrate and surrounding the sensor and the main controller, has a second vent hole on the casing for connecting to a reference air pressure;

Wherein, the sensor detects whether there is an airflow change based on the air pressure of the airway and the reference air pressure.
The sensing device according to claim 2, wherein the sensor and the main controller are packaged as an independent component, and the lifting unit is set independently of the packaged sensor and the main controller; or,

The main controller, the sensor and the lifting unit are packaged as an independent component.
The sensing device according to claim 1, wherein the sensing device is a MEMS sensor or a microphone.
A drive circuit for an electronic atomization device, including:

light emitting element;

A power supply device that provides a power supply voltage;

The sensing device is connected to the power supply device and the light-emitting element, wherein the sensing device sends out a first control signal, and the first control signal is used to raise the power supply voltage to generate a driving voltage, so as to utilize the driving the light-emitting element with a driving voltage;

Wherein, the supply voltage is lower than the conduction voltage of the light emitting element.
The driving circuit according to claim 6, wherein the power supply voltage provided by the power supply device ranges from 1.6 to 3.6V, and the first control signal raises the power supply voltage to a range of 1V to 3.2V, so that Make the generated minimum value of the driving voltage match the conduction voltage of the light-emitting element, so as to ensure that the driving voltage can drive the light-emitting element to work.
The driving circuit according to claim 6, wherein the sensing device further sends a second control signal to the loop where the light-emitting element and the power supply device are located, so as to adjust the voltage difference between the two ends of the light-emitting element to drive the Whether the light-emitting element emits light; wherein, when the second control signal is in a logic high state, the light-emitting element does not emit light; when the second control signal is in a logic-low state, the light-emitting element emits light.
The driving circuit according to claim 8, wherein the sensing device comprises:

a main control unit, configured to detect whether there is a change in airflow, and output the first control signal and the second control signal when there is a change in airflow;

The raising unit is connected to the power supply device and the main control unit, so as to use the first control signal to raise the power supply voltage to generate the driving voltage, so as to drive the light emitting element with the driving voltage.
The driving circuit according to claim 9, wherein the operating voltage of the main control unit matches the supply voltage range of the power supply device so as to work normally under the supply voltage provided by the power supply device.
The driving circuit according to claim 9, wherein the lifting unit comprises:

a first unidirectional conductor, the first end of which is connected to the power supply device to receive the power supply voltage;

a first capacitor, the first end of the first capacitor is connected to the main control unit to receive the first control signal, and the second end of the first capacitor is connected to the second end of the first unidirectional conductor , wherein the first node between the first capacitor and the first unidirectional conducting member is used as a first output terminal of the sensing device to output the driving voltage;

Wherein, the main control unit further includes a switch output terminal to output the second control signal, and the light emitting element is connected between the first output terminal and the switch output terminal.
The driving circuit according to claim 11, wherein the frequency of the first control signal is greater than 50 Hz.
The driving circuit according to claim 9, wherein the lifting unit comprises:

a first unidirectional conductor, the first end of which is connected to the power supply device to receive the power supply voltage;

a first capacitor, the first end of the first capacitor is connected to the main control unit to receive the first control signal, and the second end of the first capacitor is connected to the second end of the first unidirectional conductor ;

a second unidirectional conductor, the first end of the second unidirectional conductor is connected to the second end of the first unidirectional conductor;

A second capacitor, the first end of the second capacitor is connected to the second end of the second unidirectional conductor, and the second end of the second capacitor is grounded, wherein the second capacitor and the second The first node between the unidirectional conductive elements is used as the first output terminal of the sensing device to output the driving voltage;

Wherein, the main control unit further includes a switch output terminal to output the second control signal, and the light emitting element is connected between the first output terminal and the switch output terminal.
The driving circuit according to claim 9, wherein the lifting unit comprises:

an inductor, the first end of the inductor is connected to the power supply device to receive the power supply voltage;

A first switch, the control end of the first switch is connected to the main control unit to receive the first control signal, the first channel end of the first switch is connected to the other end of the inductor, the first switch The second path end of the ground is grounded;

a first unidirectional conductor, the first end of the first unidirectional conductor is connected to the second end of the inductor;

A first capacitor, the first end of the first capacitor is connected to the second end of the first unidirectional conducting member, wherein the first node between the first capacitor and the first unidirectional conducting member serves as a first output terminal of the sensing device to output the driving voltage;

The main control unit further includes a switch output terminal to output the second control signal, the second terminal of the first capacitor is connected to the switch output terminal, and the light emitting element is connected between the first output terminal and the between the switching outputs.
The driving circuit according to claim 14, wherein the lifting unit comprises:

a first resistor, the first end of the first resistor is connected to the first node;

a second resistor, the first end of the second resistor is connected to the second end of the first resistor, and the second end of the second resistor is connected to the switch output end;

Wherein, the main control unit further includes a feedback terminal, and the feedback terminal is connected to a fourth node between the first resistor and the second resistor to detect the driving voltage and adjust the duty ratio of the first control signal .
The driving circuit according to claim 6, wherein the first control signal is a timing pulse signal.
An electronic atomization device, comprising the driving circuit of the electronic atomization device according to any one of claims 6-16.