CN117278904B - Headphone control circuit, headphone control method and electronic equipment - Google Patents

Abstract

The present application provides an earphone control circuit, an earphone control method and an electronic device, which can quickly power off the earphone when the earphone is unplugged from the electronic device, thereby reducing or eliminating the POP sound generated by unplugging, and helping to improve the user's experience of the electronic device. The earphone control circuit includes a processing circuit, a control switch and a driving circuit, and the control switch is connected to the processing circuit and the driving circuit; when the earphone is connected to the driving circuit, the power signal output by the processing circuit is transmitted to the driving circuit through the control switch, and the driving circuit is used to power the earphone according to the power signal; the processing circuit is used to output a first control signal to the control switch when it is recognized that the earphone is disconnected from the driving circuit; the control switch is used to control the processing circuit to stop outputting the power signal to the driving circuit according to the first control signal.

Description

Headphone control circuit, headphone control method and electronic equipment

Technical Field

The embodiments of the present application relate to the technical field of electronic devices, and in particular to an earphone control circuit, an earphone control method, and an electronic device.

Background technique

With the gradual popularization of the universal serial bus Type C (USB Type-C) interface (referred to as Type-C interface), more and more electronic devices have cancelled the analog headphone (such as 3.5mm headphone) interface, but the analog headphone has not withdrawn from the market. For example, electronic devices can be connected to analog headphones through the Type-C interface to transmit audio signals to the analog headphones.

For electronic devices that support analog headphones or electronic devices that support analog headphones through the Type-C interface, when the analog headphones are unplugged from the electronic device, a sound similar to "puff" or electric current sound (this type of sound is called POP sound) is usually produced. The POP sound will greatly affect the user's experience of the electronic device. Therefore, how to reduce or eliminate the POP sound generated by unplugging is a technical problem that needs to be solved urgently.

Summary of the invention

The embodiments of the present application provide an earphone control circuit, an earphone control method and an electronic device, so that the driving circuit can be powered off quickly, so that the earphone can be powered off quickly, and the POP sound generated by unplugging can be reduced or eliminated, which helps to improve the user experience of the electronic device.

In the first aspect, the embodiment of the present application provides an earphone control circuit, which includes a processing circuit, a control switch and a driving circuit, wherein the control switch is connected to the processing circuit and the driving circuit; when the earphone is connected to the driving circuit, the power signal output by the processing circuit is transmitted to the driving circuit through the control switch, and the driving circuit is used to power the earphone according to the power signal; the processing circuit is used to output a first control signal to the control switch when it is recognized that the earphone is disconnected from the driving circuit; the control switch is used to control the processing circuit to stop outputting the power signal to the driving circuit according to the first control signal. In other words, when the earphone is unplugged, the control switch can control the driving circuit to power off according to the first control signal, so that the driving circuit can be powered off quickly, and the earphone can be powered off quickly, thereby reducing or eliminating the POP sound generated by unplugging, which helps to improve the user's experience of the electronic device.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the processing circuit includes a control signal output terminal, the control signal output terminal is used to output a first control signal to a control switch; the control switch includes a control terminal, the control terminal is connected to the control signal output terminal, and when the control switch receives the first control signal, the processing circuit is controlled to be electrically disconnected from the drive circuit. In this way, the control switch controls the processing circuit to be electrically disconnected from the drive circuit, so that the processing circuit stops outputting a power signal to the drive circuit, so that the drive circuit can be quickly powered off, and the headphone can be quickly powered off.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the processing circuit further includes a power supply end, that is, the processing circuit includes a control signal output end and a power supply end, and the power supply end is used to output a power signal to supply power to the driving circuit; the control switch further includes a first conductive end and a second conductive end, that is, the control switch includes a control end, a first conductive end and a second conductive end. The control end is connected to the control signal output end, the first conductive end is connected to the power supply end, and the second conductive end is connected to the driving circuit; when the control end of the control switch receives the first control signal output by the control signal output end, the control switch controls the second conductive end to be electrically disconnected from the driving circuit, so that the processing circuit no longer supplies power to the driving circuit, so that the driving circuit can be quickly powered off, and the headphone can be quickly powered off.

In combination with the headset control circuit provided in the first aspect, in some embodiments, the control switch is a first transistor, and the first transistor includes a gate, a drain, and a source; the gate is connected to the control signal output terminal as a control terminal; the drain is connected to the drive circuit as a second conductive terminal; the source is connected to the power supply terminal as a first conductive terminal. When the gate of the first transistor receives the first control signal, the first transistor is turned off, and the power supply terminal is electrically disconnected from the drive circuit, so that the processing circuit no longer supplies power to the drive circuit, so that the drive circuit can be quickly powered off, and the headset can be quickly powered off.

In combination with the headset control circuit provided in the first aspect, in some embodiments, the processing circuit includes a control signal output terminal, the control signal output terminal is used to output a first control signal to a control switch; the control switch includes a control terminal, the control terminal is connected to the control signal output terminal, and when the control switch receives the first control signal, the processing circuit and the driving circuit are connected to the ground terminal. The processing circuit and the driving circuit are connected to the ground terminal, so that the processing circuit no longer supplies power to the determination circuit, so that the driving circuit can be quickly powered off, and the headset can be quickly powered off.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the processing circuit further includes a power supply terminal, that is, the processing circuit includes a control signal output terminal and a power supply terminal, and the power supply terminal is used to output a power signal to supply power to the driving circuit; the control switch further includes a first conductive terminal and a second conductive terminal, that is, the control switch includes a control terminal, a first conductive terminal and a second conductive terminal. The control terminal is connected to the control signal output terminal, the first conductive terminal is connected to the power supply terminal and the driving circuit, and the second conductive terminal is connected to the ground terminal; when the control terminal of the control switch receives the first control signal output by the control signal output terminal, the control circuit and the driving circuit are connected to the ground terminal, so that the processing circuit no longer supplies power to the determination circuit, and the driving circuit no longer supplies power to the headphone, so that the headphone can be powered off quickly.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the control switch is a second transistor, and the second transistor includes a gate, a drain and a source. The gate serves as a control terminal and is connected to the control signal output terminal; the drain serves as a first conductive terminal and is connected to the power supply terminal and the drive circuit; the source serves as a second conductive terminal and is connected to the ground terminal. When the gate of the second transistor receives the first control signal, the second transistor is turned on, so that the processing circuit and the drive circuit are electrically connected to the ground terminal through the drain and the source, that is, the processing circuit and the drive circuit are connected to the ground terminal through the turned-on second transistor. In this way, the voltage of the power signal output by the power supply terminal is quickly lowered, so that the drive circuit can be quickly powered off and the headphones can be quickly powered off.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the headphone control circuit further includes a current limiting unit, one end of the current limiting unit is connected to the source of the second transistor, and the other end is connected to the ground terminal, that is, the current limiting unit is connected to the source and the ground terminal of the second transistor. When the second transistor is turned on, the drain and source of the second transistor are electrically connected to the ground terminal through the current limiting unit, so that the power supply end and the drive circuit are electrically connected to the ground terminal, so that the voltage of the power signal output by the power supply end is quickly lowered, so that the drive circuit can be quickly powered off, and the headphone can be quickly powered off. Among them, the current limiting unit is used to limit the current from the power supply end to the ground terminal when the second transistor is turned on, so as to avoid the current of the power supply signal being too large and burning the second transistor. The current limiting unit can be a current limiting resistor.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the processing circuit is further used to output a second control signal to the control switch when the headphone is identified to be connected to the driving circuit; the control switch is further used to control the processing circuit and the driving circuit to be electrically connected according to the second control signal, so that the processing circuit can supply power to the driving circuit. The level of the second control signal is different from the level of the first control signal. That is, control signals of different levels make the processing circuit and the driving circuit electrically connected or disconnected.

In conjunction with the headphone control circuit provided in the first aspect, in some embodiments, the level of the first control signal is a high level, and the level of the second control signal is a low level. That is, the high-level control signal causes the processing circuit to no longer supply power to the drive circuit, so that the headphone is powered off; the low-level control signal uses the processing circuit to supply power to the drive circuit, so that the headphone is powered on. The control signal may be a headphone interrupt signal.

In combination with the headphone control circuit provided in the first aspect, in some embodiments, the control switch includes one or more of an N-type transistor, a P-type transistor, and a switch. Among them, the N-type transistor can be the second transistor mentioned above, and the P-type transistor can be the first transistor mentioned above. In other words, the control switch can be a transistor, or a combination of multiple transistors or switches, for example, the control switch includes an N-type transistor and a P-type transistor. For the control switch being a transistor or a switch, the circuit structure is simple and easy to implement.

In the second aspect, an embodiment of the present application provides a headset control method, which is applied to an electronic device, and the electronic device includes a processing circuit, a control switch, and a driving circuit; wherein, when the headset is inserted into the electronic device, the processing circuit is used to output a power signal and transmit the power signal to the driving circuit through the control switch, and the driving circuit is used to power the headset according to the power signal. The method may include: in response to the headset being unplugged from the electronic device and disconnected from the driving circuit, the processing circuit outputs a first control signal; the control switch receives the first control signal, and controls the processing circuit to stop outputting the power signal to the driving circuit according to the first control signal. That is, when the headset is unplugged, the control switch can control the driving circuit to power off according to the first control signal, so that the driving circuit can be powered off quickly, and the headset can be powered off quickly, thereby reducing or eliminating the POP sound generated by unplugging, which helps to improve the user's experience of the electronic device.

In combination with the method provided in the second aspect, in some embodiments, after the earphone is unplugged from the electronic device and the earphone is powered off, in response to the earphone being plugged into the electronic device and connected to the driving circuit, the processing circuit outputs a second control signal; the control switch receives the second control signal, and controls the processing circuit to output a power signal to the driving circuit according to the second control signal, so that the processing circuit can supply power to the driving circuit. The level of the second control signal is different from the level of the first control signal. That is, control signals of different levels make the processing circuit and the driving circuit electrically connected or disconnected.

In combination with the method provided in the second aspect, in some embodiments, the level of the first control signal is a high level, and the level of the second control signal is a low level. That is, the high-level control signal causes the processing circuit to no longer supply power to the drive circuit, so that the headset is powered off; the low-level control signal uses the processing circuit to supply power to the drive circuit, so that the headset is powered on. The control signal may be a headset interrupt signal.

In combination with the method provided in the second aspect, in some embodiments, the control switch includes one or more of an N-type transistor, a P-type transistor, and a switch. That is, the control switch can be a transistor, or a combination of multiple transistors or switches, for example, the control switch includes an N-type transistor and a P-type transistor. For the control switch being a transistor or a switch, the circuit structure is simple and easy to implement.

In a third aspect, an embodiment of the present application provides an electronic device, which includes the earphone control circuit provided by the first aspect and any possible implementation manner of the first aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of an application scenario provided by an embodiment of the present application;

FIG2 is a schematic diagram of the pins of a circular plug simulating an earphone;

FIG3A is a schematic diagram of the circuit structure of a current earphone control circuit;

FIG3B is a waveform diagram of an earphone being inserted into the electronic device 100;

FIG3C is a waveform diagram showing that the earphone is unplugged from the electronic device 100;

FIG4 is a schematic diagram of a circuit structure of an earphone control circuit provided in an embodiment of the present application;

FIG5 is a schematic diagram of the circuit structure of another earphone control circuit provided in an embodiment of the present application;

FIG6 is a waveform diagram of an earphone dialing out of an electronic device 100 provided in an embodiment of the present application;

FIG7 is an exemplary diagram of an earphone control circuit provided in an embodiment of the present application;

FIG8 is an exemplary diagram of another earphone control circuit provided in an embodiment of the present application;

FIG. 9 is a hardware structure diagram of an electronic device provided in an embodiment of the present application.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in 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. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second", "third", etc. in the embodiments of the present application are distinguished from different objects, rather than being used to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a series of steps or units are included, or alternatively, steps or units not listed are also included, or other steps or units inherent to these processes, methods, products or devices are also included.

For electronic devices that support analog headphones or electronic devices that support analog headphones through a Type-C interface, when the analog headphones are inserted into the electronic device, the probability of generating a POP sound is low because the electronic device has delays such as software startup in the power-on logic of the external headphone circuit module; however, when the analog headphones are unplugged from the electronic device, since audio and other signals are always in a communication state and unplugging is an instantaneous physical action, the probability of generating a POP sound is higher.

In view of this, the embodiments of the present application provide an earphone control circuit, an earphone control method, and an electronic device, which reduce or eliminate the POP sound generated by unplugging a simulated earphone by adding a control switch in the circuit structure of the electronic device, thereby helping to improve the user experience of the electronic device. In other words, the POP sound generated by unplugging a simulated earphone can be reduced or eliminated without improving the software process of the electronic device.

In order to make the technical solution of the present application clearer, the application scenarios of the embodiments of the present application are first introduced below.

For example, please refer to Fig. 1, which is an example diagram of an application scenario provided by an embodiment of the present application. The application scenario may include an electronic device 100, a Type-C adapter 200, and a headset 300.

The electronic device 100 may be a mobile phone or a tablet computer; the electronic device 100 may also be a desktop computer, a laptop computer, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a cellular phone, a personal digital assistant (PDA), an augmented reality (AR) device, a virtual reality (VR) device, an artificial intelligence (AI) device, a wearable device, a vehicle-mounted device, a smart home device and/or a smart city device; the electronic device 100 may also be a music player, a walkman or other playback device. The embodiment of the present application does not impose any special restrictions on the specific type of the electronic device. The application scenario shown in FIG1 takes the electronic device 100 as a mobile phone as an example.

The Type-C adapter 200 includes a Type-C plug and an analog headphone jack, and the Type-C plug and the analog headphone jack are connected via a data cable. The Type-C plug fits with the Type-C interface and is used to be inserted into the Type-C interface of the electronic device 100; the analog headphone jack fits with the round plug of the analog headphone and is used to be inserted into the round plug of the analog headphone. After the Type-C plug is inserted into the Type-C interface of the electronic device 100 and the analog headphone plug is inserted into the analog headphone jack, the electronic device 100 is connected to the analog headphone, and then the electronic device 100 can transmit audio signals to the analog headphone.

The earphone 300 refers to an analog earphone, which can be understood as an earphone without a Type-C plug, or can be understood as a common cylindrical plug 3.5mm earphone. The analog earphone can be connected to the electronic device 100 via the Type-C adapter 200. The earphone involved in the embodiment of the present application refers to an analog earphone.

The scenario shown in (1) of FIG. 1 is that the Type-C plug has been inserted into the Type-C interface of the electronic device 100, and the round plug of the earphone 300 is about to be inserted into the analog earphone jack. This scenario can be understood as a scenario in which the earphone 300 is about to be inserted into the electronic device 100. In the embodiment of the present application, the earphone 300 is inserted into the electronic device 100 by directly inserting the earphone 300 into the 3.5mm earphone jack of the electronic device 100 through its round plug, or the earphone 300 is inserted into the Type-C interface of the electronic device 100 through the Type-C adapter 200.

The scenario shown in (2) of FIG. 1 is that the Type-C plug has been inserted into the Type-C interface of the electronic device 100, and the round plug of the earphone 300 is about to be unplugged from the analog earphone jack. This scenario can be understood as a scenario in which the earphone 300 is about to be unplugged from the electronic device 100. In the embodiment of the present application, the earphone 300 may be unplugged from the electronic device 100 directly from the 3.5mm earphone jack of the electronic device 100, or may be unplugged from the analog earphone jack of the Type-C adapter 200, instead of the Type-C plug being unplugged from the electronic device 100.

That is to say, the embodiments of the present application can be applied to scenarios where headphones are directly plugged into or unplugged from electronic devices, or to scenarios where headphones are plugged into or unplugged from electronic devices via Type-C adapters, or to scenarios where headphones are plugged into or unplugged from electronic devices via other types of adapters.

Please refer to Figure 2, which is a schematic diagram of the pins of the circular plug of the analog headset. The circular plug of the analog headset includes four pins, which are pin SLEEVE, pin RING2, pin RING1 and pin TIP. As shown in (1) of Figure 2, pin SLEEVE is used for grounding, pin RING2 is used to implement the microphone function, pin RING1 is used to implement the right channel function, and pin TIP is used to implement the left channel function. As shown in (2) of Figure 2, pin SLEEVE is used to implement the microphone function, pin RING2 is used for grounding, pin RING1 is used to implement the right channel function, and pin TIP is used to implement the left channel function. The bold lines in Figure 2 represent the front view effect of the insulating ring.

Before introducing the earphone control circuit provided in the embodiment of the present application, the current earphone control circuit is introduced.

Please refer to FIG3A, which is a schematic diagram of the circuit structure of the current earphone control circuit. The earphone control circuit is a partial circuit structure of the electronic device 100, including a processing circuit 301 and a driving circuit 302. The processing circuit 301 is used to power the driving circuit 302 when the earphone is inserted into the electronic device, so that the driving circuit 302 powers the earphone.

The driving circuit 302 is an earphone circuit on the electronic device 100, which is used to implement the functions of the earphone circuit. The driving circuit can also be described as an earphone driving circuit, an earphone circuit, or an earphone hardware circuit. The driving circuit 302 is used to power on or off the earphone. The driving circuit 302 can power on the earphone when there is power supply; the driving circuit 302 can power off the earphone when there is no power supply.

The processing circuit 301 may include a control signal module 301a for providing a high-level or low-level control signal, the control signal being a headphone interrupt signal, which may also be described as HP_EINT. For example, before the headphone is inserted into the electronic device 100, the control signal module 301a provides a high-level control signal; when the headphone is inserted into the electronic device 100, the control signal module 301a changes the control signal from a high level to a low level, and then provides a low-level control signal; when the headphone is unplugged from the electronic device 100, the control signal module 301a changes the control signal from a low level to a high level, and then provides a high-level control signal.

Optionally, the processing circuit 301 may also include other modules, such as an audio module and an application processor (AP) module. The audio module is used to implement audio functions, such as audio encoding and decoding. The audio module may further include a power supply V1 inside the audio module, a software switch, a hardware gate circuit, a register, and a power supply V2 for supplying power to the drive circuit 302. The power supply for supplying power to the audio module may be referred to as the total power supply V0 of the audio module, and the total power supply V0 of the audio module may be included in the processing circuit 301 or outside the processing circuit 301. The AP module can implement the functions of the AP, and the operating system, user interface, and application programs of the electronic device 100 are all executed on the AP. For the convenience of description, the total power supply V0 of the audio module is referred to as V0, and the power supply V2 for supplying power to the drive circuit 302 is referred to as V2.

The processing circuit 301 may be an integrated circuit (IC), such as a codec IC, a power management unit (PMU) IC, etc. The processing circuit 301 may also be a system on chip (SOC), etc.

The processing circuit 301 includes a power supply terminal 3011 and a control signal output terminal 3012. The power supply terminal 3011 is used to supply power to the driving circuit 302. The control signal output terminal 3012 can be understood as an output terminal of the control signal module 301a, which is used to output a control signal.

Taking the example that the control signal module 301a provides a high-level control signal before the earphone is inserted into the electronic device 100, when the earphone is inserted into the electronic device 100, the spring in the analog earphone jack of the electronic device 100 is short-circuited with the ground terminal (Ground, GND), so that the control signal module 301a changes the control signal from a high level to a low level. The driving circuit 302 includes a spring in the analog earphone jack and GND. When the earphone is inserted into the electronic device 100, the spring in the driving circuit 302 is short-circuited with GND, so that the control signal module 301a changes the control signal from a high level to a low level, so that the control signal module 301a outputs a low-level control signal.

For example, see the waveform diagram of the earphone being inserted into the electronic device 100 shown in FIG3B. In FIG3B, the voltage of the control signal is always at a high level before the earphone is inserted, and immediately becomes a low level when the earphone is inserted; the voltage of V2 is always at a low level before the earphone is inserted, and becomes a high level after a period of time (i.e., the time difference shown by the dotted line) after the earphone is inserted; the voltage of MIC_P is always at a low level before the earphone is inserted, and becomes a high level after a period of time (i.e., the time difference shown by the dotted line) after the earphone is inserted. In other words, the change in the voltage of MIC_P is consistent with the change in the voltage of V2. Among them, MIC_P refers to the pin in the analog headphone jack that matches the pin SLEEVE shown in (2) of FIG2. The time difference shown by the dotted line can be understood as the debounce time, and its value range is 250ms~260ms. FIG3A takes 260ms as an example. The debounce time can also be understood as the delay time between V2 and the actual insertion time.

When the earphone is unplugged from the electronic device 100, the spring in the analog earphone jack of the electronic device 100 is separated from GND, so that the control signal module 301a changes the control signal from a low level to a high level, and the control signal module 301a outputs a high level control signal.

For example, see the waveform of the earphone being unplugged from the electronic device 100 shown in FIG3C. In FIG3C, the voltage of the control signal is always at a low level before being unplugged, and becomes a high level after being unplugged, but the voltage of V2 is at a high level after being unplugged, and the high level is maintained for a period of time (FIG3C takes this period of time as 2ms as an example), and then becomes a low level after this period of time. Within this 2ms, when the earphone is unplugged, if the earphone pin SLEEVE, the pin RING1 or the pin TIP is short-circuited with the GND in the analog earphone jack, a POP sound will be generated because the earphone has not been completely powered off.

It is understandable that, based on the circuit structure shown in Fig. 3A, a POP sound is generated when the earphone is unplugged from the electronic device 100. Therefore, an embodiment of the present application provides an earphone control circuit that can reduce or eliminate the POP sound generated by unplugging.

The earphone control circuit provided in the embodiment of the present application is introduced below.

Please refer to Figure 4, which is a schematic diagram of the circuit structure of an earphone control circuit provided in an embodiment of the present application. The earphone control circuit is a partial circuit structure of the electronic device 100, including a processing circuit 301, a driving circuit 302 and a control switch 303. Among them, the processing circuit 301 includes a control signal module 301a, and the specific description of the module can be referred to in Figure 3A.

The control switch 303 is connected to the processing circuit 301 and the driving circuit 302. When the earphone is inserted into the electronic device 100 (that is, the earphone is electrically connected to the driving circuit 302), the control switch 303, the processing circuit 301 and the driving circuit 302 are electrically connected, so that the processing circuit 301 can supply power to the driving circuit 302. The electrical connection refers to the circuit connection, that is, the circuit is connected and can transmit voltage and current.

When the earphone is inserted into the electronic device 100, the spring in the driving circuit 302 is short-circuited to GND, so that the driving circuit 302 is connected to the earphone, so that the driving circuit 302 can power the earphone. The driving circuit 302 powers the earphone, which can be understood as the driving circuit 302 providing a power signal to the earphone. Based on the circuit connection between the driving circuit 302 and the earphone, and the electrical connection between the control switch 303, the processing circuit 301 and the driving circuit 302, the power signal output by the processing circuit 301 can be transmitted to the driving circuit 302 through the control switch 303, so that the driving circuit 302 powers the earphone according to the power signal.

When the earphone is unplugged from the electronic device 100, the spring in the driving circuit 302 is separated from the GND, so that the circuit connection between the driving circuit 302 and the earphone is disconnected. When the processing circuit 301 recognizes that the earphone is disconnected from the driving circuit 302, it outputs a first control signal to the control switch 303. The level of the first control signal is different from the level before the earphone is disconnected from the driving circuit 302. For example, the first control signal is a high level, and the control signal before the earphone is disconnected from the driving circuit 302 is a low level; for another example, the first control signal is a low level, and the control signal before the earphone is disconnected from the driving circuit 302 is a high level. The embodiment of the present application takes the first control signal as a high level as an example. Specifically, when the control signal module 301a recognizes that the earphone is disconnected from the driving circuit 302, it changes the control signal from a low level to a high level and outputs the first control signal.

When the control switch 303 receives the first control signal, the control switch 303 controls the processing circuit 301 to stop outputting the power signal to the driving circuit 302 according to the first control signal. That is, the control switch 303 controls the processing circuit 301 to stop supplying power to the driving circuit 302 according to the first control signal. In the circuit structure shown in FIG4 , the control switch 303 controls the processing circuit 301 to be electrically disconnected from the driving circuit 302 according to the first control signal, that is, the circuit path between the processing circuit 301 and the driving circuit 302 is disconnected, so that the processing circuit 301 no longer supplies power to the driving circuit 302, and the driving circuit 302 no longer supplies power to the earphone, so that the earphone can be powered off quickly.

The processing circuit 301 includes a control signal output terminal 3012, and the control signal output terminal 3012 is used to output a control signal to the control switch 303. When the earphone is unplugged from the electronic device 100, the control signal output terminal 3012 is used to output a first control signal to the control switch 303. In other words, the control signal output terminal 3012 is used to output the first control signal to the control switch 303.

The processing circuit 301 further includes a power supply terminal 3011 , and the power supply terminal 3011 is used to output a power signal to the driving circuit 302 .

As shown in FIG4 , the control switch 303 includes a control terminal 3031, a first conductive terminal 3032, and a second conductive terminal 3033. The control terminal 3031 is connected to the control signal output terminal 3012, the first conductive terminal 3032 is connected to the power supply terminal 3011, and the second conductive terminal 3033 is connected to the drive circuit 302. When the control terminal 3031 receives the first control signal, the first conductive terminal 3032 is controlled to be electrically disconnected from the second conductive terminal 3033, so that the processing circuit 301 is electrically disconnected from the drive circuit 302.

When the earphone is unplugged from the electronic device 100 and then plugged into the electronic device 100 again, the spring in the driving circuit 302 is short-circuited with the GND, so that the driving circuit 302 is connected to the earphone. When the processing circuit 301 recognizes that the earphone is connected to the driving circuit 302, it outputs a second control signal to the control switch. Specifically, when the control signal module 301a recognizes that the earphone is connected to the driving circuit 302, it changes the control signal from a high level to a low level and outputs a second control signal.

When the control switch 303 receives the second control signal, the control switch 303 controls the processing circuit 301 to be electrically connected to the driving circuit 302 according to the second control signal. In other words, the control switch 303 controls the processing circuit 301 to supply power to the driving circuit 302 according to the second control signal. Specifically, when the control terminal 3031 receives the second control signal, the control terminal 3031 controls the first conductive terminal 3032 to be electrically connected to the second conductive terminal 3033, so that the processing circuit 301 and the driving circuit 302 are electrically connected.

For example, see the waveform of the earphone being unplugged from the electronic device 100 shown in FIG6 . In FIG6 , the voltage of the control signal is always at a low level before being unplugged, and becomes a high level after a period of time after being unplugged; the voltage of V2 is always at a high level before being unplugged, and becomes a low level after a period of time after being unplugged. The period of time shown by the dotted line in FIG6 can be understood as the voltage change time of V2, and its value range is within 330 microseconds, and FIG6 takes 330 microseconds as an example. This value range is smaller than the value range of the de-bouncing time, so it can effectively reduce the POP sound generated by unplugging, and even avoid any POP sound. In FIG6 , there is a slight delay between the voltage change of the control signal and the voltage change of V2, and the slight delay may be the delay reflected by the control switch 303 or the delay in the transmission of the first control signal.

By comparing FIG6 and FIG3C , it can be seen that after the voltage signal of the control signal changes from a low level to a high level, the high level of V2 in FIG3C lasts for 2 ms before changing to a low level, which is much longer than the voltage change time of V2 in FIG6 , which is 330 microseconds. Thus, the use of the embodiment of the present application can effectively reduce or avoid the POP sound generated by dialing out.

Please refer to Figure 5, which is a schematic diagram of the circuit structure of another earphone control circuit provided in an embodiment of the present application. The earphone control circuit is a partial circuit structure of the electronic device 100, including a processing circuit 301, a driving circuit 302 and a control switch 303. Among them, the processing circuit 301 includes a control signal module 301a, and the specific description of the module can be referred to in Figure 3A.

The control switch 303 is connected to the processing circuit 301 and the driving circuit 302. When the earphone is inserted into the electronic device 100 (that is, the earphone is electrically connected to the driving circuit 302), the control switch 303, the processing circuit 301 and the driving circuit 302 are electrically connected, so that the processing circuit 301 can supply power to the driving circuit 302.

When the earphone is inserted into the electronic device 100 , the spring in the driving circuit 302 is short-circuited with the GND, so that the driving circuit 302 is connected to the earphone, so that the driving circuit 302 can supply power to the earphone.

When the earphone is unplugged from the electronic device 100, the spring in the driving circuit 302 is separated from the GND, so that the circuit connection between the driving circuit 302 and the earphone is disconnected. When the processing circuit 301 recognizes that the earphone is disconnected from the driving circuit 302, it outputs a first control signal to the control switch 303. Specifically, when the control signal module 301a recognizes that the earphone is disconnected from the driving circuit 302, it changes the control signal from a low level to a high level and outputs the first control signal.

When the control switch 303 receives the first control signal, the control switch 303 controls the processing circuit 301 to stop outputting the power signal to the driving circuit 302 according to the first control signal. That is, the control switch 303 controls the processing circuit 301 to stop supplying power to the driving circuit 302 according to the first control signal. In the circuit structure shown in FIG5 , the control switch 303 controls the processing circuit 301 and the driving circuit 302 to be connected to GND according to the first control signal, that is, the processing circuit 301 and the driving circuit 302 are grounded, so that the processing circuit 301 no longer supplies power to the driving circuit 302, and the driving circuit 302 no longer supplies power to the earphone, so that the earphone can be powered off quickly.

The processing circuit 301 includes a control signal output terminal 3012, which is used to output a control signal to the control switch 303. The processing circuit 301 also includes a power supply terminal 3011, which is used to output a power signal to the driving circuit 302.

As shown in FIG5 , the control switch 303 includes a control terminal 3031, a first conductive terminal 3032, and a second conductive terminal 3033. The control terminal 3031 is connected to the control signal output terminal 3012, the first conductive terminal 3032 is connected to the power supply terminal 3011 and the drive circuit 302, and the second conductive terminal 3033 is connected to GND. When the control terminal 3031 receives the first control signal, the first conductive terminal 3032 and the second conductive terminal 3033 are electrically connected and grounded, so that the processing circuit 301 no longer supplies power to the drive circuit 302.

Optionally, the circuit structure shown in FIG5 may further include a current limiting unit, which is connected to the second conductive end 3033 and GND; the first conductive end 3032 and the second conductive end 3033 are electrically connected to GND through the current limiting unit. The current limiting unit is used to limit the current from the power supply end 3011 to GND when the first conductive end 3032 and the second conductive end 3033 are electrically connected. In other words, the current limiting unit is used to avoid the situation where V2 is pulled out of the overcurrent. The current limiting unit can be a current limiting resistor, and the size of the current limiting resistor is related to the voltage and current of the power signal output by the power supply end 3011. For example, the resistance of the current limiting resistor is not greater than the ratio of the voltage to the current of the power signal output by the power supply end 3011. For the earphone being unplugged from the electronic device 100 and then inserted into the electronic device 100, the spring in the drive circuit 302 is short-circuited with GND, so that the drive circuit 302 is connected to the earphone. When the processing circuit 301 recognizes that the earphone is connected to the drive circuit 302, it outputs a second control signal to the control switch.

When the control switch 303 receives the second control signal, the control switch 303 controls the processing circuit 301 and the driving circuit 302 to be electrically connected according to the second control signal. That is, the control switch 303 controls the processing circuit 301 to supply power to the driving circuit 302 according to the second control signal. Specifically, when the control terminal 3031 receives the second control signal, the first conductive terminal 3032 and the second conductive terminal 3033 are electrically disconnected, so that the processing circuit 301 and the driving circuit 302 are electrically connected. For example, see the waveform diagram of the earphone being unplugged from the electronic device 100 shown in FIG6. In FIG6, the voltage of the control signal is always at a low level before being unplugged, and becomes a high level after a period of unplugging; the voltage of V2 is always at a high level before being unplugged, and becomes a low level after a period of unplugging. The period of time shown by the dotted line in FIG6 can be understood as the voltage change time of V2, and its value range is within 330 microseconds. FIG6 takes 330 microseconds as an example. This value range is smaller than the value range of the debounce time, so it can effectively reduce the POP sound caused by unplugging, and even avoid any POP sound. In Figure 6, there is a slight delay between the voltage change of the control signal and the voltage change of V2, which may be the delay reflected by the control switch 303 or the delay of the first control signal transmission.

By comparing FIG6 and FIG3C , it can be seen that after the voltage signal of the control signal changes from a low level to a high level, the high level of V2 in FIG3C lasts for 2 ms before changing to a low level, which is much longer than the voltage change time of V2 in FIG6 , which is 330 microseconds. Thus, the use of the embodiment of the present application can effectively reduce or avoid the POP sound generated by dialing out.

Based on the circuit structures shown in FIG. 4 and FIG. 5 , the voltage change time of V2 is taken as 330 microseconds as an example. Considering the difference between the structures of FIG. 4 and FIG. 5 , the voltage change time of V2 may be slightly different, but the voltage change time is in microseconds.

The earphone control circuit provided in the embodiment of the present application is described below by way of example.

For example, please refer to the example diagram of a headset control circuit shown in FIG7. FIG7 replaces the control switch 303 in FIG4 with a first transistor, and the first transistor is a P-type transistor. The first transistor includes a gate (G), a drain (D), and a source (S). The gate (G) serves as the control terminal 3031 in FIG4, the drain (D) serves as the second conductive terminal 3033 in FIG4, and the source (S) serves as the first conductive terminal 3032 in FIG4. When the first transistor receives the first control signal, the first transistor is turned off, so that the power supply terminal 3011 is electrically disconnected from the drive circuit 302, so that the processing circuit 301 no longer supplies power to the drive circuit 302, so that the drive circuit 302 can be quickly powered off, and the headset can be quickly powered off. When the first transistor receives the second control signal, the first transistor is turned on, so that the power supply terminal 3011 is electrically connected to the drive circuit 302, so that the processing circuit 301 supplies power to the drive circuit 302, so that the drive circuit 302 can power the headset.

For example, please refer to another example diagram of the headphone control circuit shown in FIG8. FIG8 replaces the control switch 303 in FIG5 with a second transistor, and the second transistor is an N-type transistor. The second transistor includes a gate (G), a drain (D), and a source (S). The gate (G) serves as the control terminal 3031 in FIG5, the drain (D) serves as the first conductive terminal 3032 in FIG5, the source (S) serves as the second conductive terminal 3033 in FIG5, and the source (S) is connected to GND through a current limiting resistor 3034. When the second transistor receives the first control signal, the second transistor is turned on, and the processing circuit 301 and the driving circuit 302 are grounded, so that the processing circuit 301 no longer supplies power to the driving circuit 302, so that the driving circuit 302 can be quickly powered off, and the headphone can be quickly powered off. When the second transistor receives the second control signal, the second transistor is turned off, so that the power supply terminal 3011 is electrically connected to the driving circuit 302, so that the processing circuit 301 supplies power to the driving circuit 302, so that the driving circuit 302 can power the headphone.

FIG7 takes a P-type transistor as an example, and FIG8 takes an N-type transistor as an example. By adding a transistor on the basis of FIG3A, the POP sound generated when the earphone is unplugged can be reduced or eliminated. The change to FIG3A is small, easy to implement, and low cost. Optionally, the control switch can adopt a combination of a P-type transistor and an N-type transistor. The specific combination structure is not limited in the embodiment of the present application. Optionally, the control switch can also be a switch or a switch chip, etc., for realizing the function of single-pole double throw. In other words, the control switch can include one or more of an N-type transistor, a P-type transistor, and a switch.

The embodiment of the present application also provides a headset control method, which is applied to an electronic device, and the electronic device includes a processing circuit, a control switch and a driving circuit; wherein, when the headset is inserted into the electronic device, the processing circuit is used to output a power signal and transmit the power signal to the driving circuit through the control switch, and the driving circuit is used to power the headset according to the power signal. When the headset is unplugged from the electronic device, the headset is disconnected from the driving circuit, and the processing circuit outputs a first control signal; the control switch receives the first control signal, and controls the processing circuit to stop outputting the power signal to the driving circuit according to the first control signal. In other words, when the headset is unplugged, the control switch can control the driving circuit to power off according to the first control signal, so that the driving circuit can be powered off quickly, and the headset can be powered off quickly, thereby reducing or eliminating the POP sound generated by unplugging, which helps to improve the user's experience of the electronic device.

After the earphone is unplugged from the electronic device and powered off, when the earphone is plugged into the electronic device again, the earphone is connected to the driving circuit, and the processing circuit outputs a second control signal; the control switch receives the second control signal, and controls the processing circuit to output a power signal to the driving circuit according to the second control signal, so that the processing circuit can supply power to the driving circuit.

FIG. 9 exemplarily shows a schematic diagram of the hardware structure of the electronic device 100 .

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio processing module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, etc.

It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an AP, a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors. In an embodiment of the present application, the processor 110 may implement the functions of a processing circuit.

The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of instruction fetching and execution.

The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

In some embodiments, the processor 110 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (SIM) interface, and/or a universal serial bus (USB) interface, etc.

The USB interface 130 is an interface that complies with the USB standard specification, and can specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the electronic device 100, and can also be used to transfer data between the electronic device 100 and a peripheral device. It can also be used to connect headphones to play audio through the headphones. The interface can also be used to connect other electronic devices, such as AR devices, etc. In an embodiment of the present application, the USB Type C interface is used to connect analog headphones via a Type-C adapter.

It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present invention is only a schematic illustration and does not constitute a structural limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

The charging management module 140 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger through the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive wireless charging input through a wireless charging coil of the electronic device 100. While the charging management module 140 is charging the battery 142, it may also power the electronic device through the power management module 141.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

The wireless communication function of the electronic device 100 can be implemented through the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, the modem processor and the baseband processor.

Antenna 1 and antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve the utilization of antennas. For example, antenna 1 can be reused as a diversity antenna for a wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

The mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 150 can receive electromagnetic waves from the antenna 1, and filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module 150 can also amplify the signal modulated by the modulation and demodulation processor, and convert it into electromagnetic waves for radiation through the antenna 1. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. Among them, the modulator is used to modulate the low-frequency baseband signal to be sent into a medium-high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing. After the low-frequency baseband signal is processed by the baseband processor, it is passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to a speaker 170A, a receiver 170B, etc.), or displays an image or video through a display screen 194. In some embodiments, the modem processor may be an independent device. In other embodiments, the modem processor may be independent of the processor 110 and be set in the same device as the mobile communication module 150 or other functional modules.

The wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared (IR), etc., which are applied to the electronic device 100. The wireless communication module 160 can be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the frequency of the electromagnetic wave signal and performs filtering, and sends the processed signal to the processor 110. The wireless communication module 160 can also receive the signal to be sent from the processor 110, modulate the frequency of it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2.

In some embodiments, the antenna 1 of the electronic device 100 is coupled to the mobile communication module 150, and the antenna 2 is coupled to the wireless communication module 160, so that the electronic device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code division multiple access (WCDMA), time division code division multiple access (TD-SCDMA), long term evolution (LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology, etc. The GNSS may include global positioning system (GPS), global navigation satellite system (GLONASS), Beidou navigation satellite system (BDS), quasi-zenith satellite system (QZSS) and/or satellite based augmentation system (SBAS).

The electronic device 100 implements the display function through a GPU, a display screen 194, and an application processor. The GPU is a microprocessor for image processing, which connects the display screen 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The internal memory 121 may include one or more random access memories (RAM) and one or more non-volatile memories (NVM).

Random access memory may include static random-access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM, for example, the fifth generation DDR SDRAM is generally referred to as DDR5 SDRAM), etc. Non-volatile memory may include disk storage devices and flash memory.

The random access memory can be directly read and written by the processor 110, and can be used to store executable programs (such as machine instructions) of the operating system or other running programs, and can also be used to store user and application data.

The non-volatile memory may also store executable programs and user and application data, etc., and may be loaded into the random access memory in advance for direct reading and writing by the processor 110 .

The external memory interface 120 can be used to connect to an external non-volatile memory to expand the storage capacity of the electronic device 100. The external non-volatile memory communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music and videos are stored in the external non-volatile memory.

The electronic device 100 can implement audio functions such as music playing and recording through the audio processing module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone interface 170D, and the application processor.

The audio processing module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio processing module 170 can also be used to encode and decode audio signals. In some embodiments, the audio processing module 170 can be arranged in the processor 110, or some functional modules of the audio processing module 170 can be arranged in the processor 110.

The speaker 170A, also called a "speaker", is used to convert an audio electrical signal into a sound signal. The electronic device 100 can listen to music or listen to a hands-free call through the speaker 170A.

The receiver 170B, also called a "earpiece", is used to convert audio electrical signals into sound signals. When the electronic device 100 receives a call or voice message, the voice can be received by placing the receiver 170B close to the human ear.

Microphone 170C, also called "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or sending a voice message, the user can speak by approaching the microphone 170C with his mouth to input the sound signal into the microphone 170C.

The earphone interface 170D is used to connect a wired earphone and can be a USB interface 130 or a 3.5 mm open mobile terminal platform (OMTP) standard interface or a cellular telecommunications industry association of the USA (CTIA) standard interface.

The pressure sensor 180A is used to sense the pressure signal and can convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A can be set on the display screen 194. The gyroscope sensor 180B can be used to determine the motion posture of the electronic device 100. The air pressure sensor 180C is used to measure the air pressure. The magnetic sensor 180D includes a Hall sensor. The electronic device 100 can use the magnetic sensor 180D to detect the opening and closing of the flip leather case. The acceleration sensor 180E can detect the magnitude of the acceleration of the electronic device 100 in various directions (generally three axes). The distance sensor 180F is used to measure the distance. The proximity light sensor 180G can include, for example, a light emitting diode (LED) and a light detector, such as a photodiode. The ambient light sensor 180L is used to sense the brightness of the ambient light. The fingerprint sensor 180H is used to collect fingerprints. The temperature sensor 180J is used to detect the temperature. The touch sensor 180K is also called a "touch device". The touch sensor 180K can be set on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, also called a "touch screen". The touch sensor 180K is used to detect a touch operation applied thereto or in the vicinity thereof. The bone conduction sensor 180M can acquire a vibration signal.

The key 190 includes a power key, a volume key, etc. The key 190 may be a mechanical key or a touch key. The electronic device 100 may receive key input and generate key signal input related to user settings and function control of the electronic device 100.

Motor 191 can generate vibration prompts. Motor 191 can be used for incoming call vibration prompts, and can also be used for touch vibration feedback. Indicator 192 can be an indicator light, which can be used to indicate charging status, power changes, messages, missed calls, notifications, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be connected to or disconnected from the electronic device 100 by inserting the SIM card interface 195 or pulling the SIM card interface 195 out. The electronic device 100 can support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 can support Nano SIM cards, Micro SIM cards, SIM cards, etc.

The term "user interface (UI)" in the specification, claims and drawings of this application refers to the medium interface for interaction and information exchange between an application or operating system and a user, which realizes the conversion between the internal form of information and the form acceptable to the user. The user interface of an application is a source code written in a specific computer language such as Java and extensible markup language (XML). The interface source code is parsed and rendered on the terminal device, and finally presented as content that can be recognized by the user, such as pictures, text, buttons and other controls. Controls (controls), also known as widgets, are basic elements of the user interface. Typical controls include toolbars, menu bars, text boxes, buttons, scroll bars, pictures and text. The properties and contents of controls in the interface are defined by tags or nodes. For example, XML specifies the controls contained in the interface through nodes such as <Textview>, <ImgView>, and <VideoView>. A node corresponds to a control or attribute in the interface, and the node is presented as user-visible content after being parsed and rendered. In addition, many applications, such as hybrid applications, usually also contain web pages in their interfaces. A web page, also called a page, can be understood as a special control embedded in an application interface. A web page is a source code written in a specific computer language, such as hypertext markup language (GTML), cascading style sheets (CSS), JavaScript (JS), etc. The web page source code can be loaded and displayed as user-recognizable content by a browser or a web page display component similar to a browser. The specific content contained in a web page is also defined by tags or nodes in the web page source code. For example, GTML defines the elements and attributes of a web page through <p>, <img>, <video>, and <canvas>.

The most common form of user interface is graphical user interface (GUI), which refers to a user interface related to computer operation that is displayed in a graphical manner. It can be an icon, window, control or other interface element displayed on the display screen of an electronic device, where a control can include icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, widgets and other visual interface elements.

As used in the specification and the appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include plural expressions, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" used in the present application refers to and includes any or all possible combinations of one or more of the listed items. As used in the above embodiments, the term "when..." may be interpreted to mean "if..." or "after..." or "in response to determining..." or "in response to detecting...", depending on the context. Similarly, the phrase "when determining..." or "if (stated condition or event) is detected" may be interpreted to mean "if determining..." or "in response to determining..." or "when (stated condition or event) is detected" or "in response to detecting (stated condition or event)", depending on the context.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk), etc.

A person skilled in the art can understand that to implement all or part of the processes in the above-mentioned embodiments, the processes can be completed by a computer program to instruct the relevant hardware, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. The aforementioned storage medium includes: ROM or random access memory RAM, magnetic disk or optical disk and other media that can store program codes.

Claims (12)

1. An earphone control circuit, the earphone control circuit comprising a processing circuit and a driving circuit; the earphone control circuit is characterized by further comprising a control switch, wherein the control switch is connected with the processing circuit and the driving circuit; when the earphone is connected with the driving circuit, a power signal output by the processing circuit is transmitted to the driving circuit through the control switch, and the driving circuit is used for supplying power to the earphone according to the power signal;

The processing circuit is used for changing a control signal from a second control signal to a first control signal when the earphone is disconnected with the driving circuit, and outputting the first control signal to the control switch;

the control switch is used for controlling the processing circuit to stop outputting the power supply signal to the driving circuit according to the first control signal so that the driving circuit can not supply power to the earphone any more;

When the earphone is connected with the driving circuit, the processing circuit is further used for continuously outputting the second control signal to the control switch; the control switch is further used for controlling the processing circuit to be electrically conducted with the driving circuit according to the second control signal so that a power signal output by the processing circuit is transmitted to the driving circuit through the control switch;

The level of the second control signal is a low level, and the level of the first control signal is a high level.

2. The earphone control circuit of claim 1, wherein the processing circuit comprises a control signal output; the control signal output end is used for outputting the first control signal to the control switch;

The control switch comprises a control end, and the control end is connected with the control signal output end; and when the control switch receives the first control signal, the control switch controls the processing circuit to be electrically disconnected from the driving circuit.

3. The earphone control circuit of claim 2, wherein the processing circuit further comprises a power supply terminal for outputting the power signal;

the control switch further comprises a first conductive end and a second conductive end, wherein the first conductive end is connected with the power supply end, and the second conductive end is connected with the driving circuit; and when the control switch receives the first control signal, the control switch controls the second conductive end to be electrically disconnected from the driving circuit.

4. The earphone control circuit of claim 3, wherein the control switch is a first transistor comprising a gate, a drain, and a source; the grid electrode is used as the control end, the drain electrode is used as the second conductive end, and the source electrode is used as the first conductive end; the first transistor receives the first control signal, the first transistor is cut off, and the power supply end is electrically disconnected from the driving circuit.

5. The earphone control circuit of claim 1, wherein the processing circuit comprises a control signal output; the control signal output end is used for outputting the first control signal to the control switch;

The control switch comprises a control end, and the control end is connected with the control signal output end; when the control switch receives the first control signal, the control switch controls the processing circuit and the driving circuit to be connected to a grounding end; the processing circuit and the driving circuit are connected to the grounding end, and the processing circuit stops outputting the power signal to the driving circuit.

6. The headset control circuit of claim 5 wherein the processing circuit further comprises a power supply terminal for outputting the power signal;

the control switch further comprises a first conductive end and a second conductive end, wherein the first conductive end is connected with the power supply end and the driving circuit, and the second conductive end is connected with the grounding end; when the control switch receives the first control signal, the processing circuit and the driving circuit are controlled to be connected to the grounding end.

7. The earphone control circuit of claim 6, wherein the control switch is a second transistor comprising a gate, a drain, and a source; the grid electrode is used as the control end, the drain electrode is used as the first conductive end, and the source electrode is used as the second conductive end; the second transistor receives the first control signal, the second transistor is conducted, and the processing circuit and the driving circuit are electrically connected with the grounding end through the first conductive end and the second conductive end.

8. The headset control circuit of claim 7 wherein the headset control circuit further comprises a current limiting unit connected to the second conductive terminal and the ground terminal; the first conductive end and the second conductive end are electrically connected with the grounding end through the current limiting unit;

The current limiting unit is used for limiting the current from the power supply end to the grounding end when the second transistor is conducted.

9. The headset control circuit of any of claims 1-8 wherein the control switch comprises one or more of an N-type transistor, a P-type transistor, a switch.

10. The earphone control method is characterized by being applied to electronic equipment, wherein the electronic equipment comprises a processing circuit, a control switch and a driving circuit; wherein, when the earphone is plugged into the electronic device, the processing circuit is used for outputting a power signal and transmitting the power signal to the driving circuit through the control switch, and the driving circuit is used for supplying power to the earphone according to the power signal, and the method comprises: in response to the earphone being pulled out of the electronic device and disconnected from the drive circuit, the processing circuit changes a control signal from a second control signal to a first control signal and outputs the first control signal; the control switch receives the first control signal and controls the processing circuit to stop outputting the power supply signal to the driving circuit according to the first control signal so that the driving circuit does not supply power to the earphone any more;

when the earphone is connected with the driving circuit, the processing circuit continuously outputs a second control signal;

The control switch continuously receives the second control signal and controls the processing circuit to continuously output the power signal to the driving circuit according to the second control signal so that the power signal output by the processing circuit is transmitted to the driving circuit through the control switch;

The level of the second control signal is a low level, and the level of the first control signal is a high level.

11. The method of claim 10, wherein the control switch comprises one or more of an N-type transistor, a P-type transistor, a switch.

12. An electronic device comprising the earphone control circuit according to any one of claims 1-9.