KR20220016710A - Method for determining whether an external device is connected, and an electronic device supporting the same - Google Patents

Abstract

Disclosed is an electronic device including: an ear connector into which an earphone plug is inserted; a first comparator for comparing an input signal applied from a first terminal connected to a sensing terminal included in the ear connector through a first electrical path and a reference voltage according to a first specified condition applied from a second terminal, thereby outputting a first output signal; a second comparator for comparing an input signal applied from a third terminal connected to the sensing terminal through a second electrical path branching from a point of the first electrical path and a reference voltage according to a second specified condition applied from a fourth terminal, thereby outputting a second output signal; and a processor electrically connected to the first comparator and the second comparator to determine a connection state with the plug of the earphone based on the first output signal output from the first comparator and the second output signal output from the second comparator. In addition, various embodiments understood through the present specification are possible. Therefore, deterioration of current consumption performance of the electronic device is prevented.

Description

A method for determining whether an external device is connected, and an electronic device supporting the same

Various embodiments of the present document relate to a method of determining whether an external device is connected and an electronic device supporting the same.

With the development of multimedia technology, an electronic device (eg, a smart phone) may provide a user with various functions, such as a call function, a music playback function, and a video playback function. For example, when an earphone plug is inserted into an ear connector to support input or output of an audio signal to a user, the electronic device is connected to the earphone, and is connected to various types of audio signals through the connected earphone. function can be provided.

In the past, according to the standardization trend, a 6-pin ear connector was used for electronic devices, but the need to use a 5-pin ear connector instead of a 6-pin ear connector is emerging for reasons such as mass production and cost reduction. At the same time, problems related to the submersion performance of the 5-pin ear connector were presented.

When an earphone plug is inserted into the existing 5-pin ear connector, input signals are respectively applied to a CODEC and a processor of the electronic device, among which the processor receives the applied input signal through the ADC terminal. can However, since the processor cannot immediately perform an operation on an input signal applied through the ADC terminal, an operation of periodically switching from a sleep mode to a wake up mode may be performed. . The processor periodically goes from sleep mode to wake up mode, so that the connection status between the earphone plug and the ear connector (e.g., whether the earphone is connected to the electronic device and the state inside the ear connector) can be checked. However, as the processor periodically performs an operation of switching from a sleep mode to a wake up mode, current consumption performance of the electronic device may deteriorate.

According to various embodiments disclosed in this document, when an earphone plug is inserted into a 5-pin ear connector, the electronic device receives an input signal through a left sensing terminal among a plurality of terminals included in the 5-pin ear connector, and receives the received signal. An input signal may be applied to a pair of comparators, respectively. The electronic device may output each output signal based on a specified condition through a pair of comparators receiving each input signal. The processor of the electronic device may receive each output signal through the interrupt terminal, and may immediately determine a connection state between the earphone plug and the ear connector based on the received output signal.

An electronic device according to various embodiments of the present disclosure includes an ear connector into which a plug of an earphone is inserted, an input signal applied from a first terminal connected to a sensing terminal included in the ear connector and a first electrical path through a first electrical path, and a second terminal. A first comparator that compares a reference voltage according to an applied first specified condition to output a first output signal, a third connected to the sensing terminal through a second electrical path branched from a point of the first electrical path A second comparator outputting a second output signal by comparing an input signal applied from a terminal and a reference voltage according to a second specified condition applied from a fourth terminal, and the first comparator and the second comparator are electrically connected, , based on a first output signal output from the first comparator and a second output signal output from the second comparator, a processor for determining a connection state with the plug of the earphone.

An electronic device according to various embodiments of the present disclosure includes an ear connector into which a plug of an earphone is inserted, an input signal applied from a first terminal connected through a first electrical path to a sensing terminal included in the ear connector, and a second terminal. A first comparator that compares a reference voltage according to an applied first specified condition to output a first output signal, a third connected to the sensing terminal through a second electrical path branched from a point of the first electrical path a second comparator that compares an input signal applied from a terminal with a reference voltage according to a second specified condition applied from a fourth terminal, and outputs a second output signal, and is connected to the first comparator and the second comparator; Based on a first output signal output from the first comparator and a second output signal output from the second comparator, a gate outputting a third output signal, and a third output signal output from the gate , a processor for checking a connection state with the plug of the earphone.

An electronic device according to various embodiments of the present disclosure includes a display, an ear connector into which a plug of an earphone is inserted, an input signal applied from a first terminal connected to a sensing terminal included in the ear connector through a first electrical path, and a second A first comparator that compares a reference voltage according to a first specified condition applied from a terminal and outputs a first output signal, and is connected to the sensing terminal through a second electrical path branched from one point of the first electrical path a second comparator outputting a second output signal by comparing the input signal applied from the third terminal and the reference voltage according to the second specified condition applied from the fourth terminal; and a plug of the earphone connected to the display, the first comparator, and the second comparator, based on a first output signal output from the first comparator and a second output signal output from the second comparator and a processor that determines the connection state of the , and outputs the determination result through the display.

According to various embodiments of the present disclosure, a method for determining whether an external device is connected and an electronic device supporting the same receive an input signal through a left sensing terminal, and apply the received input signal to a pair of comparators, respectively In order for the processor to check the connection state between the earphone plug and the ear connector by receiving the output signal output by a pair of comparators through the interrupt terminal of the processor, the processor periodically performs a sleep mode (sleep mode). ) to the wake-up mode is not performed, so a problem in which the current consumption performance of the electronic device deteriorates can be solved.

In addition, since the processor receives the output signal through the interrupt terminal, it is possible to reduce the material cost due to the removal of the ADC port, and it is possible to prevent misrecognition of the earphone by foreign substances in the 5-pin ear connector.

In addition to this, various effects that are directly or indirectly identified through this document may be provided.

1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure;
2 is a block diagram of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.
3 is a flowchart illustrating a method of determining whether an earphone is connected, according to an embodiment of the present invention.
4 is a diagram for explaining a method of determining whether an earphone is connected according to a resistance value, according to an embodiment of the present invention.
5 is another block diagram of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.
6 is another flowchart of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.
7 is a diagram for explaining another method of determining whether an earphone is connected according to a resistance value, according to an embodiment of the present invention.

In relation to the description of the above drawings, the same reference numerals may be assigned to the same or corresponding components.

Hereinafter, various embodiments of the present invention will be described with reference to the accompanying drawings. For convenience of description, the sizes of the components shown in the drawings may be exaggerated or reduced, and the figures are not limited thereto.

1 is a block diagram of an electronic device 101 in a network environment 100 according to various embodiments. Referring to FIG. 1 , in a network environment 100 , an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120 , a memory 130 , an input module 150 , a sound output module 155 , a display module 160 , an audio module 170 , and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or an antenna module 197 may be included. In some embodiments, at least one of these components (eg, the connection terminal 178 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components (eg, sensor module 176 , camera module 180 , or antenna module 197 ) are integrated into one component (eg, display module 160 ). can be

The processor 120, for example, executes software (eg, a program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120 . It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) to the volatile memory 132 . may be stored in the volatile memory 132 , and may process commands or data stored in the volatile memory 132 , and store the result data in the non-volatile memory 134 . According to an embodiment, the processor 120 is the main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit) a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, when the electronic device 101 includes the main processor 121 and the sub-processor 123 , the sub-processor 123 may use less power than the main processor 121 or may be set to be specialized for a specified function. can The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The auxiliary processor 123 is, for example, on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, executing an application). ), together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to an embodiment, the co-processor 123 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 180 or the communication module 190). have. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. Artificial intelligence models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself on which artificial intelligence is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the above example. The artificial intelligence model may include, in addition to, or alternatively, a software structure in addition to the hardware structure.

The memory 130 may store various data used by at least one component of the electronic device 101 (eg, the processor 120 or the sensor module 176 ). The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 , and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input module 150 may receive a command or data to be used in a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output a sound signal to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. The receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.

The display module 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display module 160 may include, for example, a control circuit for controlling a display, a hologram device, or a projector and a corresponding device. According to an embodiment, the display module 160 may include a touch sensor configured to sense a touch or a pressure sensor configured to measure the intensity of a force generated by the touch.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input module 150 , or an external device (eg, an electronic device) connected directly or wirelessly to the sound output module 155 or the electronic device 101 . device 102) (eg, speakers or headphones).

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more designated protocols that may be used by the electronic device 101 to directly or wirelessly connect with an external device (eg, the electronic device 102 ). According to an embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external device (eg, the electronic device 102 ). According to an embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to an embodiment, the power management module 188 may be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 establishes a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external device (eg, the electronic device 102, the electronic device 104, or the server 108). , and may support performing communication through an established communication channel. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : It may include a LAN (local area network) communication module, or a power line communication module). A corresponding communication module among these communication modules is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (eg, a telecommunication network such as a LAN or a WAN). These various types of communication modules may be integrated into one component (eg, a single chip) or may be implemented as a plurality of components (eg, multiple chips) separate from each other. The wireless communication module 192 uses the subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199 . The electronic device 101 may be identified or authenticated.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, a new radio access technology (NR). NR access technology includes high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency) -latency communications)). The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 includes various technologies for securing performance in a high-frequency band, for example, beamforming, massive multiple-input and multiple-output (MIMO), all-dimensional multiplexing. It may support technologies such as full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements specified in the electronic device 101 , an external device (eg, the electronic device 104 ), or a network system (eg, the second network 199 ). According to an embodiment, the wireless communication module 192 may include a peak data rate (eg, 20 Gbps or more) for realizing eMBB, loss coverage (eg, 164 dB or less) for realizing mMTC, or U-plane latency for realizing URLLC ( Example: downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less).

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as a part of the antenna module 197 .

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module comprises a printed circuit board, an RFIC disposed on or adjacent to a first side (eg, bottom side) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second side (eg, top or side) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( eg commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or a part of operations executed in the electronic device 101 may be executed in one or more external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 is to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. One or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a response to the request. For this, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an Internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199 . The electronic device 101 may be applied to an intelligent service (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

2 is a block diagram of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.

Referring to FIG. 2 , the electronic device 200 (eg, the electronic device 101 of FIG. 1 ) includes an ear connector 201 (eg, the connection terminal 178 of FIG. 1 ), a first electrical path 203 , It may include a second electrical path 205 , a first comparator 207 , a second comparator 209 , and a processor 211 (eg, the processor 120 of FIG. 1 ). However, the configuration of the electronic device 200 is not limited thereto.

According to various embodiments, the electronic device 200 may omit at least one of the above-described components, and may include at least one other component. For example, the electronic device 200 may include a display (eg, the display module 160 of FIG. 1 ). The electronic device 200 may display a connection state between the earphone plug and the ear connector through the display.

According to an embodiment, the ear connector 201 may mean a socket capable of accommodating a plug of an earphone having a microphone input and/or audio output function, and the electronic device through the ear connector 201 . A 4-pole earphone or a 3-pole earphone may be connected to 200 . The plug of the 4-pole earphone may include a microphone terminal, a ground terminal, a right sound terminal, and a left sound terminal. The plug of the three-pole earphone may include a ground terminal, a right sound terminal, and a left sound terminal except for the microphone terminal.

According to an embodiment, the ear connector 201 has a first pin in contact with the microphone terminal of the 4-pole earphone plug, a second pin in contact with the ground terminal of the earphone plug, and a right sound terminal of the earphone plug. and a third pin, a fourth pin and a fifth pin contacting the left acoustic terminal of the earphone plug.

According to another embodiment, the ear connector 201 includes a first pin and a second pin contacting the ground terminal of the three-pole earphone plug, a third pin contacting the right sound terminal of the earphone plug, and the earphone plug. It may include a fourth pin and a fifth pin contacting the left acoustic terminal.

According to an embodiment, the fifth pin contacting the left acoustic terminal of the earphone plug may be a left-side detection (L-detection) terminal. The ear connector 201 referred to in the present invention may be a 5-pin ear connector.

According to an embodiment, when the earphone plug (eg, the electronic device 102 of FIG. 1 ) is inserted into the ear connector 201 , the sensing terminal of the ear connector 201 and the first comparator 207 . And a pull-up voltage being applied to the second comparator 209 may be voltage-divided. In more detail, a pull-up voltage by a bias power may be always applied to the sensing terminal in the ear connector 201 , the first comparator 207 , and the second comparator 209 . The sensing terminal may be a left sensing terminal in contact with the left sound terminal of the earphone plug.

According to an embodiment, when the earphone plug is inserted into the ear connector 201 , the voltage of the pull-up voltage may be divided by a pull-up resistor connected to the bias power supply and a pull-down resistor connected to the earphone plug. can Hereinafter, the earphone plug is inserted into the ear connector 201 to initiate the voltage-divided pull-up voltage as an input signal. The input signal may be applied to each of the first comparator 207 and the second comparator 209 . According to an embodiment, the first comparator 207 and the second comparator 209 are the Among the five pins of the connector 201 , it may be connected to the left sensing terminal through an electrical path. The first comparator 207 may be connected to the left sensing terminal through the first electrical path 203 . The second comparator 209 may be connected to the left sensing terminal through a second electrical path 205 branched from one point of the first electrical path 203 .

According to an embodiment, the first comparator 207 may output the input signal as a first output signal based on a first specified condition. The first comparator 207 may receive the input signal (a pull-up voltage having a changed voltage level) through the first electrical path 203 . The first comparator 207 may receive a reference voltage based on a first specified condition through one of the first terminal and the second terminal. When the first terminal included in the first comparator 207 has a negative pole, the second terminal may have a positive pole. Conversely, when the first terminal is a + pole, the second terminal may be a - pole.

The first specified condition may be reference voltage information for determining whether there is a connection between the ear connector 201 and the earphone plug.

For example, the first comparator 207 is low when the voltage level of the received input signal is 0.9V or more when the reference voltage level based on the first specified condition applied to the + pole is 0.9V. level signal can be output. The first comparator 207 may output a high level signal when the voltage level of the received input signal is less than 0.9V. The level of the first output signal may be determined as a high level or a low level based on the voltage level of the input signal and the reference voltage level.

As another example, a reference voltage based on the first specified condition may be applied to the -pole of the first comparator 207 . In this case, the terminal receiving the input signal from the left sensing terminal through the first electrical path may be a + pole. The first comparator 207 outputs a high-level output signal when the voltage level of the received input signal is 0.7V or more when the reference voltage level based on the first specified condition applied to the -pole is 0.7V. can do. When the voltage level of the input signal received by the first comparator 201 is less than 0.7V, a low-level output signal may be output.

According to an embodiment, the second comparator 209 may output the input signal as a second output signal based on a second specified condition. The second comparator 209 may receive the input signal through the second electrical path 205 . The second comparator 209 may receive a reference voltage based on a second specified condition through one of the first terminal and the second terminal. When the third terminal included in the second comparator 209 has a negative pole, the fourth terminal may have a positive pole. Conversely, when the third terminal is a + pole, the fourth terminal may be a - pole. The second specified condition may be reference voltage information for determining whether there is a foreign substance inside the ear connector 201 .

For example, the second comparator 209 is low when the voltage level of the received input signal is 0.2V or more when the reference voltage level based on the second specified condition applied to the + pole is 0.2V. signal can be output. The second comparator 203 may output a high signal when the voltage level of the received input signal is less than 0.2V. The level of the second output signal may be determined as a high level or a low level based on the voltage level of the input signal and the reference voltage level.

As another example, the second comparator 209 may receive the reference voltage based on the second specified condition through the -pole. In this case, the second comparator 209 may receive an input signal through a + electrode connected to the second electrical path connected to the left sensing terminal. The second comparator 209 outputs a high-level output signal when the voltage level of the received input signal is 0.7V or more when the reference voltage level based on the second specified condition applied to the -pole is 0.7V. can do. When the voltage level of the input signal received by the second comparator 209 is less than 0.7V, a low-level output signal may be output.

That is, the level of the second output signal output by the second comparator 209 may be changed according to whether the reference voltage according to the second specified condition is applied to either the + pole or the - pole. In addition, since the voltage level of the input signal when there is a foreign material in the ear connector 201 is different from the voltage level of the input signal when there is no foreign material, the first comparator 207 to which the input signal is applied; and The level of the output signal output from the second comparator 209 may be changed.

According to an embodiment, the processor 211 may receive a first output signal output by the first comparator 207 and a second output signal output by the second comparator 209 through an interrupt terminal. . The processor 211 determines whether or not there is a connection between the ear connector 201 and the earphone plug and the presence or absence of foreign substances in the ear connector 201 based on the levels of the received first and second output signals. can do.

The operation of determining whether there is a connection between the ear connector 201 and the earphone plug and the presence or absence of foreign substances in the ear connector 201 will be described in detail with reference to FIG. 4 .

As described above, when the processor 211 receives an output signal through the interrupt terminal, it does not perform an operation of periodically switching from a sleep mode to a wake up mode, so that the electronic device It is possible to solve the problem that the current consumption performance of (200) is deteriorated.

According to various embodiments, the electronic device (eg, the electronic device 101 of FIG. 1 or the electronic device 200 of FIG. 2 ) is an earphone into which the plug of the earphone (eg, the electronic device 102 of FIG. 1 ) is inserted. A connector (eg, the connection terminal 178 of FIG. 1 or the ear connector 201 of FIG. 2 ), a sensing terminal (eg, the fifth pin 401e of FIG. 4 ) included in the ear connector, and a first electrical path ( Example: Comparing an input signal applied from a first terminal connected through the first electrical path 203 of FIG. 2 and a reference voltage according to a first specified condition applied from a second terminal, outputting a first output signal The sensing through a first comparator (eg, the first comparator 207 of FIG. 2 ), a second electrical path branching from a point of the first electrical path (eg, the second electrical path 205 of FIG. 2 ) A second comparator (eg, the second comparator of FIG. 2 ) that compares the input signal applied from the third terminal connected to the terminal and the reference voltage according to the second specified condition applied from the fourth terminal, and outputs the second output signal (209)) and electrically connected to the first comparator and the second comparator, based on a first output signal output from the first comparator and a second output signal output from the second comparator, the earphone It may include a processor (eg, the processor 120 of FIG. 1 or the processor 211 of FIG. 2 ) that determines the connection state with the plug.

According to various embodiments, the ear connector may include five terminals connected to the plug of the ear phone.

According to various embodiments, the processor detects a change in the received first output signal, determines whether the earphone is connected to the electronic device, and detects a change in the received second output signal. , it is possible to determine whether there is a foreign substance inside the ear connector.

According to various embodiments, the first specified condition is a condition set in the first comparator, and the reference voltage information for determining whether the earphone plug is connected to the electronic device and the second specified condition include: As a condition set in the second comparator, reference voltage information for determining whether there is a foreign substance inside the ear connector may be included.

According to various embodiments, the processor determines that the plug of the earphone is connected to the electronic device when the voltage level of the received first output signal is equal to or less than a reference voltage set as the first specified condition,

When the voltage level of the received second output signal is equal to or less than the reference voltage set as the second specified condition, it may be determined that there is no foreign material inside the ear connector.

According to various embodiments, the detection terminal may include a left detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector.

According to various embodiments, the processor may receive the first output signal through a first interrupt terminal and receive a second output signal through a second interrupt terminal.

According to various embodiments, the electronic device (eg, the electronic device 101 of FIG. 1 or the electronic device 200 of FIG. 2 ) includes a display (eg, the display module 160 of FIG. 1 ) and a plug of an earphone (eg: An ear connector (eg, the connection terminal 178 of FIG. 1 or the ear connector 201 of FIG. 2 ) into which the electronic device 102 of FIG. 1 ) is inserted, and a sensing terminal included in the ear connector (eg, the ear connector of FIG. 4 ) The fifth pin 401e) and the first electrical path (eg, the first electrical path 203 of FIG. 2 ) connected to the input signal applied from the first terminal and the second terminal according to the first specified condition A first comparator (eg, the first comparator 207 of FIG. 2 ) that compares the reference voltage and outputs a first output signal, a second electrical path that is branched from a point of the first electrical path (eg, FIG. 2 ) A second output signal is output by comparing the input signal applied from the third terminal connected to the sensing terminal through the second electrical path 205 of is connected to a second comparator (eg, the second comparator 209 of FIG. 2 ) and the display, the first comparator, and the second comparator, and the first output signal output from the first comparator and the second comparator A processor (eg, the processor 120 of FIG. 1 or the processor of FIG. 2 ) that determines a connection state with the plug of the earphone based on a second output signal output from the device and outputs the determination result through the display (211)) may be included.

According to various embodiments, the ear connector may include five terminals connected to the earphone plug.

According to various embodiments, the detection terminal may include a left detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector.

According to various embodiments, the first specified condition is a condition set in the first comparator, and the reference voltage information for determining whether the earphone plug is connected to the electronic device and the second specified condition include: As a condition set in the second comparator, reference voltage information for determining whether there is a foreign substance inside the ear connector may be included.

According to various embodiments, the processor detects a change in the received first output signal, determines whether the earphone is connected to the electronic device, and detects a change in the received second output signal. , it is possible to determine whether there is a foreign substance inside the ear connector.

According to various embodiments, the processor may output, through the display, one of the four connection states determined based on the determined presence or absence of the earphone connection and the determined presence or absence of a foreign object inside the ear connector.

3 is a flowchart illustrating a method of determining whether an earphone is connected, according to an embodiment of the present invention. In operation 301, the electronic device (eg, the electronic device 101 of FIG. 1 ) connects to an ear connector (eg, the electronic device 101 of FIG. 1 ). : When an earphone plug is inserted into the connection terminal 178 of FIG. 1 or the ear connector 201 of FIG. 2), an input signal can be detected.

According to an embodiment, a pull-up voltage by a bias power may be always applied to the sensing terminal, the first comparator, and the second comparator in the ear connector. When the earphone plug is inserted into the ear connector, the pull-up voltage is divided by a pull-up resistor connected to the bias power of the electronic device and a pull-down resistor of the inserted earphone plug, and the voltage level is changed can be Hereinafter, the earphone plug is inserted into the ear connector to initiate a voltage-divided pull-up voltage as an input signal.

In operation 303, the input signal may be applied to each of a first comparator (eg, the first comparator 207 of FIG. 2 and a second comparator (eg, the second comparator 209 of FIG. 2)). The first comparator may be connected to the left detection (L-detection) terminal through a first electrical path (eg, the first electrical path 203 in Fig. 2) The second comparator is branched at a point in the first electrical path It may be connected to the left sensing terminal through a second electrical path (eg, the second electrical path 205 of FIG. 2 ).

That is, the input signal may be applied to the first comparator through the first electrical path, and may be applied to the second comparator through a second electrical path branched from one point of the first electrical path.

In operation 305, the electronic device may output a first output signal and a second output signal through a pair of comparators.

According to an embodiment, the pair of comparators may include a first comparator and a second comparator. The electronic device may output a first output signal based on a first specified condition through the first comparator to which the input signal is applied. The first specified condition may be reference voltage information for determining whether the earphone plug and the ear connector are connected. The first specified condition may be set in the first comparator, and the reference voltage information may be changed according to the set value.

According to an embodiment, when the first comparator receives the input signal, it outputs the first output signal as a high-level output signal or a low-level signal according to a first specified condition. can

For example, the reference voltage 0.9V according to the first specified condition may be applied to the + pole of the first comparator. The first comparator may receive an input signal through a first electrical path connected to the -pole of the first comparator. The first comparator may output a high level output signal when the voltage level of the received input signal is 0.7V. The first comparator may output a low-level signal when the voltage level of the received input signal is 1V higher than the reference voltage 0.9V.

As another example, the reference voltage 0.7V according to the first specified condition may be applied to the -pole of the first comparator. The first comparator may receive an input signal through a first electrical path connected to the + electrode of the first comparator. The first comparator may output an output signal of a low level when the voltage level of the input signal is 0.5V. When the voltage level of the input signal applied to the first comparator is 0.8V, which is higher than the reference voltage of 0.7V, the high-level signal may be output.

According to an embodiment, the electronic device may output a second output signal based on a second specified condition through a second comparator to which the input signal is applied through a second electrical path connected to the left sensing terminal. . The second specified condition may be reference voltage information for determining whether there is a foreign substance inside the ear connector. The second specified condition may be set in the second comparator, and the reference voltage information may be changed according to the set value.

According to an embodiment, when receiving the input signal, the second comparator may output the second output signal as a high level signal or a low level signal according to a second specified condition. . For example, the reference voltage 0.2V according to the second specified condition may be applied to the + pole of the second comparator. The second comparator may receive an input signal through a second electrical path connected to the -pole of the second comparator. The second comparator may output a high level signal when the voltage level of the input signal is 0.1V. When the voltage level of the input signal received by the second comparator is 0.5V higher than the reference voltage 0.2V, a low-level signal may be output.

As another example, the reference voltage 0.5V according to the second specified condition may be applied to the -pole of the first comparator. The second comparator may receive an input signal through a second electrical path connected to the + electrode of the second comparator. The second comparator may output an output signal of a low level when the voltage level of the input signal is 0.3V. When the voltage level of the input signal applied to the second comparator is 0.8V, which is higher than the reference voltage of 0.5V, the second comparator may output a high-level signal.

In operation 307, the electronic device may determine whether there is a connection between the ear connector and the earphone plug based on the first output signal.

According to an embodiment, the processor of the electronic device (eg, the processor 120 of FIG. 1 or the processor 211 of FIG. 2 ) may receive the first output signal from the first comparator through a first interrupt terminal. have. The processor may determine whether the level of the received first output signal is a high level or a low level to determine a connection state between the ear connector and the earphone plug.

For example, the processor may receive the first output signal through the first interrupt terminal from the first comparator to which the reference voltage according to the first specified condition is applied to the + pole. When the level of the received first output signal is a high level signal, the processor may determine that the ear connector and the earphone plug are connected. When the level of the first output signal received by the processor is a low level signal, it may be determined that the ear connector and the earphone plug are not connected.

As another example, the processor may receive the first output signal through the first interrupt terminal from the first comparator to which the reference voltage according to the first specified condition is applied to the -pole. When the level of the first output signal received from the first comparator is a low level signal, the processor may determine that the ear connector and the earphone plug are connected. When the level of the first output signal received from the first comparator is a high level signal, the processor may determine that the ear connector and the earphone plug are not connected.

In operation 309, the electronic device may determine whether there is a foreign substance in the ear connector based on the second output signal.

According to an embodiment, the processor of the electronic device may check whether the second output signal received from the second comparator through the second interrupt terminal is at a high level or a low level to check the presence or absence of foreign matter in the ear connector. have.

For example, the processor may receive the second output signal through the second interrupt terminal from the second comparator to which the reference voltage according to the second specified condition is applied to the + pole. When the level of the received second output signal is a high level signal, the processor may determine that there is no foreign material in the ear connector. When the level of the second output signal is a low level signal, the processor may determine that a foreign material is present in the ear connector.

As another example, the processor may receive the second output signal through the second interrupt terminal from the second comparator to which the reference voltage according to the second specified condition is applied to the + pole. When the level of the second output signal received from the second comparator is the low level output signal, the processor may determine that there is no foreign material in the ear connector. When the level of the second output signal received from the second comparator is a high level signal, the processor may determine that a foreign material is present in the ear connector.

In operation 311 , the electronic device may determine that the earphone plug and the ear connector are in a normal connection state based on the check results in operations 307 and 309 .

According to an embodiment, the processor of the electronic device may determine that the ear connector and the earphone plug are connected in operation 307 , and may determine that there is no foreign material in the ear connector in operation 309 . The processor may determine that the earphone plug and the ear connector are normally connected based on the result of the check.

For example, the processor may determine that the level of the first output signal received from the first comparator to which the reference voltage according to the first specified condition is applied to the + pole is the high level. Also, the processor may confirm that the level of the second output signal received from the second comparator to which the reference voltage according to the second specified condition is applied to the + pole is the high level. The processor may determine that the earphone plug and the ear connector are in a normal connection state when it is confirmed that the received first output signal and the second output signal have a high level.

As another example, the processor may receive the first output signal from the first comparator to which the reference voltage according to the first specified condition is applied to the -pole. The processor may receive a second output signal from a second comparator to which a reference voltage according to the second specified condition is applied to a negative pole. The processor may determine that the earphone plug and the ear connector are in a normal connection state when it is confirmed that the received first output signal and the second output signal have a low level.

In operation 313 , the processor may determine that the earphone plug and the ear connector are in an abnormal connection state based on the result of the check in operations 307 and 309 .

According to an embodiment, the processor may determine that the ear connector and the earphone plug are connected in operation 307 . The processor may determine that there is a foreign material in the ear connector in operation 309 . The processor may determine that the earphone plug and the ear connector are in an abnormally connected state based on the result of the check. That is, the processor may determine that it is incorrectly recognized that the ear connector and the earphone plug are in a connected state due to a foreign substance present in the ear connector.

For example, the processor may receive the first output signal from the first comparator to which the reference voltage according to the first specified condition is applied to the + pole. Also, the processor may receive a second output signal from a second comparator to which the reference voltage according to the second specified condition is applied to the + pole. When the processor determines that the level of the received first output signal is the high level and the level of the second output signal is the low level, the ear connector and the earphone plug are damaged due to foreign substances present in the ear connector It can be judged that it is erroneously recognized as being in a connected state.

According to an embodiment, in operation 307, the processor determines that the ear connector and the earphone plug are not connected, and in operation 309, determines that there is a foreign substance in the ear connector. The processor may determine that the earphone plug and the ear connector are in an abnormally connected state based on the result of the check. That is, the processor may determine that the earphone plug is not connected to the ear connector due to a foreign substance present in the ear connector.

For example, the processor may receive a first output signal from a first comparator to which a reference voltage according to the first specified condition is applied to a negative pole. The processor may receive a second output signal from a second comparator to which a reference voltage according to the second specified condition is applied to a negative pole. When the processor determines that the level of the received first output signal is the high level and the level of the second output signal is the low level, the earphone plug is damaged by the foreign material present in the ear connector It can be determined that it is not connected to .

According to an embodiment, the processor may determine that the ear connector and the earphone plug are not connected in operation 307 , and determine that there is no foreign material in the ear connector in operation 309 . The processor may determine that the earphone plug and the ear connector are in an abnormally connected state based on the result of the check. The processor may determine that the earphone plug is inserted into the ear connector, but the earphone plug is not connected to the ear connector due to a factor other than a foreign substance.

For example, the processor may receive the first output signal from the first comparator to which the reference voltage according to the first specified condition is applied to the + pole. The processor may receive a second output signal from a second comparator to which the reference voltage according to the second specified condition is applied to the + pole. When the processor determines that the level of the received first output signal is the low level and the level of the second output signal is the low level, the earphone plug is inserted into the ear connector, but the ear connector It may be determined that the earphone plug is not connected due to a factor other than a foreign substance (eg, disconnection of the earphone wire).

4 is a diagram for explaining a method of determining whether an earphone is connected according to a resistance value, according to an embodiment of the present invention.

Referring to FIG. 4 , the ear connector 401 (eg, the ear connector 201 of FIG. 2 ) includes a first pin 401a, a second pin 401b, a third pin 401c, and a fourth pin 401d. ) and a fifth pin 401e.

According to an embodiment, when the earphone plug inserted into the ear connector 401 is a 4-pole earphone plug-in, the first pin 401a may contact the microphone terminal of the 4-pole ear plug. When the earphone plug is inserted into the ear connector, the electronic device (eg, the electronic device 200 of FIG. 2 ) may receive a sound generated by the earphone through the first pin 401a.

According to an embodiment, the second pin 401b may be connected to a ground terminal of the earphone plug when the earphone plug is inserted into the ear connector.

According to another embodiment, when the earphone plug inserted into the ear connector 401 is a 3-pole earphone plug-in, the first pin 401a and the second pin 401b are the ground of the 3-pole earphone plug. terminal can be connected. Hereinafter, it is assumed that the ear connector 401 is a 4-pole ear connector.

According to an embodiment, the third pin 401c is configured so that, when an earphone plug is inserted into an ear connector, a left end sound generated by the electronic device can be output through a left sound terminal of the earphone. It may be connected to the left sound terminal. The fourth pin 401d may be connected to the right sound terminal so that, when an earphone plug is inserted into the ear connector, the right end sound generated by the electronic device may be output through the right sound terminal of the earphone. have. The third pin 401c and the fourth pin 401d may be respectively connected to a pull down resistor R3 of the earphone plug. The pull-down resistor R3 may be changed according to a resistance value of an external device including a plug inserted into the ear connector.

According to an embodiment, the fifth pin 401e is connected to a first comparator 403 (eg, the first comparator 207 of FIG. 2 ) and a first electrical path (eg, the first electrical path 203 of FIG. 2 ). )), and a second comparator 405 (eg, in FIG. 2 ) through a second electrical path (eg, the second electrical path 205 in FIG. 2 ) branching at one point of the first electrical path. The second comparator 209) may be connected. The fifth pin 401e is circuitly connected to a pull-up resistor R1 connected to a series resistor R2 and a bias power supply at a point before branching into the first electrical path and the second electrical path. can The series resistor R2 may be a resistor for adjusting the voltage level range of the input signal. That is, the pull-up voltage by the bias power may be always applied to the fifth pin 401e, the first comparator, and the second comparator.

According to an embodiment, when a plug of an external device is inserted into the ear connector, the voltage level of the previously input pull-up voltage is a resistor R1 connected to the bias power supply and a resistor R3 having a resistance value of the external device. A voltage may be divided based on the series resistor R2 to determine a voltage level of the pull-up voltage. Hereinafter, the voltage-divided pull-up voltage is started as an input signal.

For example, when the value of the resistor R1 is set to 470k ohms and the value of the resistor R2 is set to 10k ohms, a plug of an earphone set to 32 ohms can be inserted into the ear connector 401 . have. When the voltage of the bias power supply is 2.5V, a voltage of 2.5V is divided based on the resistance values set in the resistors R1, R2, and R3 so that the voltage level of the input signal is determined to be 0.037617V.

As another example, when moisture flows into the ear connector 701 and the resistances inside the ear connector 701 form a parallel circuit, the resistance value in the ear connector 701 may be changed to 300k ohms. have. A plug of an earphone set to 32 ohms may be inserted into the ear connector 401 in a state in which moisture has been introduced. When the voltage of the bias power supply is 2.5V, a voltage of 2.5V is divided based on the resistance values set in the resistors R1, R2, and R3, so that the voltage level of the input signal is determined to be 0.715385V.

According to an embodiment, the first comparator 403 and the second comparator 405 may receive the input signal through a first electrical path and a second electrical path connected to the fifth pin 401e, respectively. have. The first comparator 403 may output the input signal as a first output signal based on a first specified condition. The second comparator 405 may output the input signal as a second output signal based on a second specified condition.

For example, the first comparator 403 and the second comparator 405 may receive an input signal having a voltage level of 0.037617V through the first electrical path and the second electrical path. The second electrical path may be connected to the -pole of the first comparator. The first comparator 403 to which the reference voltage 0.9V according to the first specified condition is applied to the + pole may output a high level first output signal. The second comparator 405 to which the reference voltage 0.2V according to the second specified condition is applied to the + pole may output a second output signal of a high level.

As another example, the first comparator 403 and the second comparator 405 receive an input signal having a voltage level of 0.715385V through a first electrical path and a second electrical path connected to the fifth pin 401e. can receive The first comparator 403 to which the reference voltage 0.9V according to the first specified condition is applied to the + pole may output a first output signal of high level. The reference voltage 0.2V according to the second specified condition is applied to the + pole. The applied second comparator 405 may output a second output signal of a low level.

According to an embodiment, the processor 407 receives the first output signal and the second output signal through an interrupt terminal, and based on the received first output signal and the second output signal, an ear connector ( It is possible to determine whether there is a connection between the 501 ) and an external device and whether there is a foreign substance in the ear connector 501 .

For example, when the level of the received first output signal is a high level signal, the processor 407 may determine that the ear connector 401 and the external device are connected. Also, when the level of the second output signal is a high level signal, the processor 407 may determine that there is no foreign material in the ear connector 401 . The processor 407 may determine that the external device is normally connected to the ear connector 401 based on the determination results.

As another example, when the level of the received first output signal is a high level signal, the processor 407 may determine that the ear connector 401 and the external device are connected. Also, when the level of the second output signal is a low level signal, the processor 407 may determine that a foreign material is present in the ear connector 401 . Based on the determination results, the processor 407 may determine that the external device is erroneously recognized as being connected due to a foreign substance present in the ear connector 401 .

5 is another block diagram of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.

Referring to FIG. 5 , the electronic device 500 (eg, the electronic device 101 of FIG. 1 ) includes an ear connector 501 (eg, the connection terminal 178 of FIG. 1 ) and a first electrical path 503 . (eg, first electrical path 203 of FIG. 2 ), second electrical path 505 (eg, second electrical path 205 of FIG. 2 ), first comparator 507 (eg, second electrical path 205 of FIG. 2 ) 1 comparator 207 ), second comparator 509 (eg, second comparator 209 in FIG. 2 ), gate 511 , and processor 53 (eg, processor 120 in FIG. 1 or in FIG. 2 ). A processor 211) may be included. However, the configuration of the electronic device 200 is not limited thereto.

According to various embodiments, the electronic device 500 may omit at least one of the above-described components, and may include at least one other component. For example, the electronic device 500 may include a display (eg, the display module 160 of FIG. 1 ). The electronic device 500 checks the connection state between the ear connector 501 and the earphone plug (eg, whether there is a connection between the ear connector and the earphone plug and whether there is a foreign substance in the ear connector), which is checked based on the third output signal. It can be displayed through the display.

According to an embodiment, the ear connector 501 may mean a socket capable of accommodating a plug of an earphone having a microphone input and/or audio output function, and the electronic device through the ear connector 501 . A 4-pole earphone or a 3-pole earphone may be connected to 500 . The plug of the 4-pole earphone may include a microphone terminal, a ground terminal, a right sound terminal, and a left sound terminal. The plug of the three-pole earphone may include a ground terminal, a right sound terminal, and a left sound terminal except for the microphone terminal.

According to an embodiment, the ear connector 501 has a first pin in contact with the microphone terminal of the 4-pole earphone plug, a second pin in contact with the ground terminal of the earphone plug, and a right sound terminal of the earphone plug. and a third pin, a fourth pin and a fifth pin contacting the left acoustic terminal of the earphone plug.

According to another embodiment, the ear connector 501 includes a first pin and a second pin contacting the ground terminal of the three-pole earphone plug, a third pin contacting the right sound terminal of the earphone plug, and the earphone plug. It may include a fourth pin and a fifth pin contacting the left acoustic terminal.

According to an embodiment, the fifth pin contacting the left acoustic terminal of the earphone plug may be a left-side detection (L-detection) terminal. The ear connector 501 referred to in the present invention may be a 5-pin ear connector.

According to an embodiment, when the earphone plug is inserted into the ear connector 501 , the pull being applied to the sensing terminal of the ear connector 501 , the first comparator 507 , and the second comparator 509 . A pull-up voltage may be voltage divided. In more detail, a pull-up voltage by a bias power may be always applied to the sensing terminal in the ear connector 501 , the first comparator 507 , and the second comparator 509 . The sensing terminal may be a left sensing terminal in contact with the left sound terminal of the earphone plug.

According to an embodiment, when an earphone plug is inserted into the ear connector 501 , the pull-up voltage may be divided by a pull-up resistor connected to the bias power supply and a pull-down resistor connected to the earphone plug. have. Hereinafter, the earphone plug is inserted into the ear connector 501 to initiate the voltage-divided pull-up voltage as an input signal. The input signal may be applied to each of the first comparator 507 and the second comparator 509 . According to an embodiment, the first comparator 507 and the second comparator 509 are It may be connected to the left sensing terminal among the five pins of the connector 501 through an electrical path. The first comparator 507 may be connected to the left sensing terminal through the first electrical path 503 . The second comparator 509 may be connected to the left sensing terminal through a second electrical path 505 branched from one point of the first electrical path 503 .

According to an embodiment, the first comparator 507 may output the input signal as a first output signal based on a first specified condition. The first comparator 507 may receive the input signal (a pull-up voltage with a changed voltage level) through the first electrical path 503 . The first comparator 507 may receive a reference voltage based on a first specified condition through one of the first terminal and the second terminal. When the first terminal included in the first comparator 507 has a negative pole, the second terminal may have a positive pole. Conversely, when the first terminal is a + pole, the second terminal may be a - pole.

The first specified condition may be reference voltage information for determining whether there is a connection between the ear connector 501 and the earphone plug.

For example, the first comparator 507 is low when the voltage level of the received input signal is 0.9V or more when the reference voltage level based on the first specified condition applied to the + pole is 0.9V. level signal can be output. The first comparator 507 may output a high level signal when the voltage level of the received input signal is less than 0.9V. The level of the first output signal may be determined as a high level or a low level based on the voltage level of the input signal and the reference voltage level.

According to an embodiment, the second comparator 509 may output the input signal as a second output signal based on a second specified condition. The second comparator 509 may receive the input signal through the second electrical path 505 . The second comparator 509 may receive a reference voltage based on a second specified condition through one of the first terminal and the second terminal. When the third terminal included in the second comparator 509 has a negative pole, the fourth terminal may have a positive pole. Conversely, when the third terminal is a + pole, the fourth terminal may be a - pole. The second specified condition may be reference voltage information for determining whether there is a foreign substance inside the ear connector 501 .

For example, the second comparator 509 is low when the voltage level of the received input signal is 0.2V or more when the reference voltage level based on the second specified condition applied to the + pole is 0.2V. signal can be output. The second comparator 509 may output a high signal when the voltage level of the received input signal is less than 0.2V. The level of the second output signal may be determined as a high level or a low level based on the voltage level of the input signal and the reference voltage level.

According to an embodiment, the gate 511 may receive the first output signal output by the first comparator 507 and the second output signal output by the second comparator 509 . The gate 511 may be an AND gate.

According to an embodiment, the gate 511 may output a third output signal based on the level of the first output signal and the level of the second output signal.

For example, when the level of the first output signal is a high level and the level of the second output signal is a high level, the gate 511 may output a third output signal of a high level. As another example, when the level of the first output signal is a high level and the level of the second output signal is a low level, the gate 511 may output a third output signal of a low level.

According to an embodiment, the processor 513 may receive a third output signal from the gate 511 through an interrupt terminal. The processor 513 may determine whether there is a connection between the ear connector 501 and the earphone plug and the presence or absence of foreign matter in the ear connector 501 based on the third output signal. The operation of determining whether there is a connection between the ear connector 501 and the earphone plug and the presence or absence of foreign matter in the ear connector 501 will be described in detail with reference to FIG. 6 .

For example, when the level of the received third output signal is a high level, the processor 513 may determine that the ear connector 501 and the earphone plug are in a normal connection state. For another example, when the level of the received third output signal is a low level, the processor 513 may determine that the ear connector 501 and the ear phone plug are in an abnormal connection state.

According to various embodiments, the electronic device (eg, the electronic device 101 of FIG. 1 or the electronic device 200 of FIG. 2 ) is inserted into the earphone plug (eg, the electronic device 102 of FIG. 1 ). An ear connector (eg, the connection terminal 178 of FIG. 1 or the ear connector 501 of FIG. 5 ), a sensing terminal (eg, the fifth pin 401e of FIG. 4 ) included in the ear connector, and a first electrical path By comparing the input signal applied from the first terminal connected through (eg, the first electrical path 503 of FIG. 5 ) with the reference voltage according to the first specified condition applied from the second terminal, the first output signal is output through a first comparator (eg, the first comparator 507 of FIG. 5 ), and a second electrical path that is branched from a point of the first electrical path (eg, the second electrical path 505 of FIG. 5 ). A second comparator (eg, the second comparator of FIG. 5 ) that compares the input signal applied from the third terminal connected to the sensing terminal and the reference voltage according to the second specified condition applied from the fourth terminal, and outputs the second output signal a comparator (509), connected to the first comparator and the second comparator, based on a first output signal output from the first comparator and a second output signal output from the second comparator, a third output signal Based on a gate (eg, the gate 511 of FIG. 5 ) that outputs of the processor 120 or the processor 513 of FIG. 5).

According to various embodiments, the processor may include a first state in which the connection state between the earphone plug and the ear connector is a normal connection state and the earphone plug and the ear based on the third output signal received from the gate. One of the second states in which the connection state of the connector is an abnormal connection state may be checked.

According to various embodiments, the ear connector may include five terminals connected to the earphone plug.

According to various embodiments, the detection terminal may include a left detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector.

According to various embodiments, the gate may include an AND gate.

According to various embodiments, the electronic device may further include a display, and the processor may output the confirmation result through the display.

According to various embodiments, the processor may receive the third output signal from the gate through an interrupt terminal.

6 is another flowchart of an electronic device for determining whether an earphone is connected, according to an embodiment of the present invention.

In operation 601 , the electronic device (eg, the electronic device 101 of FIG. 1 ) inserts an earphone plug into an ear connector (eg, the connection terminal 178 of FIG. 1 or the ear connector 201 of FIG. 2 ). The input signal can be detected.

According to an embodiment, a pull-up voltage by a bias power may be always applied to the sensing terminal, the first comparator, and the second comparator in the ear connector. When the earphone plug is inserted into the ear connector, the pull-up voltage is divided by the pull-up resistor connected to the bias power of the electronic device and the pull-down resistor of the inserted earphone plug, and the voltage level is changed can be Hereinafter, the earphone plug is inserted into the ear connector to initiate a voltage-divided pull-up voltage as an input signal.

In operation 603 , the input signal may be applied to a first comparator (eg, the first comparator 209 of FIG. 2 ) and a second comparator (eg, the second comparator 209 of FIG. 2 ), respectively. The first comparator may be connected to a left detection (L-detection) terminal through a first electrical path (eg, the first electrical path 203 of FIG. 2 ). The second comparator may be connected to the left sensing terminal through a second electrical path (eg, the second electrical path 205 of FIG. 2 ) branched at one point of the first electrical path.

That is, the input signal may be applied to the first comparator through the first electrical path, and may be applied to the second comparator through a second electrical path branched from one point of the first electrical path.

In operation 605, the electronic device may output a first output signal based on a first specified condition through the first comparator. The first specified condition may be reference voltage information for determining whether the earphone plug and the ear connector are connected. The first specified condition may be set in the first comparator, and the reference voltage information may be changed according to the set value.

According to an embodiment, the first comparator may output the first output signal as a high-level output signal or a low-level signal according to a first specified condition when the input signal is applied. can

For example, the reference voltage 0.9V according to the first specified condition may be applied to the + pole of the first comparator. The first comparator may receive an input signal through a first electrical path connected to the -pole of the first comparator. When the voltage level of the applied input signal is 0.7V, the first comparator may output an output signal of a high level. The first comparator may output a low-level signal when the voltage level of the received input signal is 1V higher than the reference voltage 0.9V.

As another example, the reference voltage 0.7V according to the first specified condition may be applied to the -pole of the first comparator. The first comparator may receive an input signal through a first electrical path connected to the + electrode of the first comparator. The first comparator may output a low-level output signal when the voltage level of the applied input signal is 0.5V. The first comparator may output a high level signal when the voltage level of the applied input signal is 0.8V higher than the reference voltage 0.7V.

In operation 607, the electronic device may output a second output signal based on a second specified condition through the second comparator.

According to an embodiment, the second comparator may receive the input signal through a second electrical path branched from one point of the first electrical path. The second specified condition may be reference voltage information for determining whether there is a foreign substance inside the ear connector. The second specified condition may be set in the second comparator, and the reference voltage information may be changed according to the set value.

According to an embodiment, when the second comparator receives the input signal, it may output the second output signal as a high level signal or a low level signal according to a second specified condition. have. For example, the reference voltage 0.2V according to the second specified condition may be applied to the + pole of the second comparator. The second comparator may receive an input signal through a second electrical path connected to the -pole of the second comparator. The second comparator may output a high level signal when the voltage level of the input signal is 0.1V. The second comparator may output a low-level signal when the voltage level of the received input signal is 0.5V higher than the reference voltage 0.2V.

As another example, the reference voltage 0.5V according to the second specified condition may be applied to the -pole of the first comparator. The second comparator may receive an input signal through a second electrical path connected to the + electrode of the second comparator. The second comparator may output a low-level output signal when the voltage level of the received input signal is 0.3V. When the voltage level of the input signal received by the second comparator is 0.8V, which is higher than the reference voltage of 0.5V, the second comparator may output a high-level signal.

In operation 609 , the electronic device may output a third output signal based on the first output signal and the second output signal through a gate (eg, the gate 511 of FIG. 5 ).

According to an embodiment, the electronic device may output a high level third output signal or a low level third output signal through a gate to which the first output signal and the second output signal are applied. can The gate may be an AND gate.

For example, the gate may receive a high level first output signal from a first comparator to which the reference voltage according to the first specified condition is applied to the + pole. In addition, the gate may receive a high level second output signal from a second comparator to which the + pole of the reference voltage according to the second specified condition is applied. The gate may output a high level third output signal when the received first output signal and the second output signal have a high level.

As another example, when at least one of the received first output signal and the second output signal has a low level, the gate may output a low-level third output signal.

According to another embodiment, the gate may be a nor gate. For example, the NO-R gate may receive a low-level first output signal from a first comparator to which a reference voltage according to the first specified condition is applied to a negative pole. Also, the NO-R gate may receive a low-level second output signal from a second comparator to which the reference voltage according to the second specified condition is applied to a negative pole. The gate may output a high level third output signal when the received first output signal and the second output signal have a low level.

As another example, when at least one of the applied first output signal and the second output signal has a high level, the NOR gate may output a low-level third output signal.

In operation 611, the electronic device may check a connection state between the ear connector and the earphone plug based on the third output signal.

According to an embodiment, the processor of the electronic device (eg, the processor 120 of FIG. 1 or the processor 209 of FIG. 2 ) may receive the third output signal through an interrupt terminal. The processor may check a connection state between the ear connector and the earphone plug based on the level of the received third output signal.

For example, the gate may be an AND gate. When the level of the third output signal received from the gate through the interrupt terminal is a high level signal, the processor may determine that the ear connector and the earphone plug are in a normal connection state.

As another example, when the level of the third output signal received by the processor is a low level signal, it may be confirmed that the ear connector and the earphone plug are in an abnormal connection state. That is, the processor may check the connection state of the ear connector and the earphone plug based on the level of the received third output signal.

As another example, the gate may be a nor gate. The processor may receive the third output signal from the NO R gate. When the level of the third output signal is the low level signal, the processor may determine that the ear connector and the earphone plug are in an abnormal connection state. When the level of the received third output signal is a high level signal, the processor may determine that the ear connector and the earphone plug are in a normal connection state.

That is, in FIG. 6 , the processor can check the connection state of the ear connector and the earphone plug based on the level of the third output signal received from the gate through the interrupt terminal. An operation of determining a connection state between an ear connector and an earphone plug may not be performed based on the first output signal outputted and the second output signal outputted from the second comparator.

7 is a diagram for explaining another method of determining whether an earphone is connected according to a resistance value, according to an embodiment of the present invention.

Referring to FIG. 7 , the ear connector 701 (eg, the ear connector 201 of FIG. 2 ) includes a first pin 701a, a second pin 701b, a third pin 701c, and a fourth pin 701d. ) and a fifth pin 701e.

According to an embodiment, when the earphone plug inserted into the ear connector 701 is a 4-pole earphone plug-in, the first pin 701a may contact the microphone terminal of the 4-pole ear plug. When the earphone plug is inserted into the ear connector, the electronic device (eg, the electronic device 200 of FIG. 2 ) may receive the sound generated by the earphone through the first pin 701a.

According to an embodiment, the second pin 701b may be connected to a ground terminal of the earphone plug when the earphone plug is inserted into the ear connector.

According to another embodiment, when the earphone plug inserted into the ear connector 701 is a 3-pole earphone plug-in, the first pin 701a and the second pin 701b are the ground of the 3-pole earphone plug. terminal can be connected. Hereinafter, it is assumed that the ear connector 701 is a 4-pole ear connector.

According to an embodiment, the third pin 701c is configured so that, when the earphone plug is inserted into the ear connector, the left end sound generated by the electronic device can be output through the left sound terminal of the earphone. It may be connected to the left sound terminal. The fourth pin 701d may be connected to the right sound terminal so that, when an earphone plug is inserted into the ear connector, the right end sound generated by the electronic device can be output through the right sound terminal of the earphone. have. The third pin 701c and the fourth pin 701d may be respectively connected to a pull down resistor R3 of the earphone plug. The pull-down resistor R3 may be changed according to a resistance value of an external device including a plug inserted into the ear connector.

According to an embodiment, the fifth pin 701e is connected to a first comparator 703 (eg, the first comparator 207 of FIG. 2 ) and a first electrical path (eg, the first electrical path 203 of FIG. 2 ). )), and a second comparator 705 (eg, in FIG. 2 ) through a second electrical path (eg, the second electrical path 205 in FIG. 2 ) branching at one point of the first electrical path. The second comparator 209) may be connected. The fifth pin 701e may be connected to a series resistor R2 and a pull-up resistor R1 at a point before branching into the first electrical path and the second electrical path. The series resistor R2 may be a resistor for adjusting the voltage level range of the input signal. That is, the pull-up voltage by the bias power may always be applied to the fifth pin 701e, the first comparator, and the second comparator.

According to an exemplary embodiment, when a plug of an external device is inserted into the ear connector, a resistor R1 connected to the bias power source and a resistor R1 connected to the bias power supply that are previously inputted, a resistor R3 having a resistance value of the external device, and the series resistor R2 By dividing the voltage based on , the voltage level of the pull-up voltage may be determined. Hereinafter, the voltage-divided pull-up voltage is started as an input signal.

For example, when the value of the resistor R1 is set to 470k ohm and the value of the resistor R2 is set to 33k ohm, the open cable in which the resistance value is set to 12k ohm in the ear connector 701 ) can be inserted. When the voltage of the bias power supply is 2.5V, a voltage of 2.5V is divided based on the resistance values set in the resistors R1, R2, and R3, so that the voltage level of the input signal is determined to be 0.157282V.

As another example, when moisture flows into the ear connector 701 and the resistances inside the ear connector 701 form a parallel circuit, the resistance value in the ear connector 701 may be changed to 300k ohms. have. An open cable plug set to 12k ohms may be inserted into the ear connector 401 in a state in which moisture is introduced. When the voltage of the bias power supply is 2.5V, a voltage of 2.5V is divided based on the resistance values set in the resistors R1, R2, and R3 so that the voltage level of the input signal is determined to be 0.746451V.

According to an embodiment, the first comparator 703 and the second comparator 705 may receive input signals through a first electrical path and a second electrical path connected to the fifth pin 701e, respectively. . The first comparator 703 may output a first output signal based on a first specified condition. The second comparator 705 may output a second output signal based on a second specified condition.

For example, the first comparator 703 may receive an input signal having a voltage level of 0.157282V through a first electrical path. The first electrical path may be connected to the -pole of the first comparator 703 . The first comparator 703 may output a first output signal of a high level when the reference voltage 0.9V according to the first specified condition is applied through the + pole. Also, the second comparator 705 may receive an input signal having a voltage level of 0.157282V through a second electrical path. The second electrical path may be connected to the -pole of the second comparator 705 . The second comparator 705 may output a high level second output signal when the reference voltage 0.2V according to the second specified condition is applied through the + pole.

As another example, the first comparator 703 may receive an input signal having a voltage level of 0.746451V through a first electrical path. The first electrical path may be connected to the -pole of the first comparator 703 . The first comparator 703 may output a first output signal of a high level when the reference voltage 0.9V according to the first specified condition is applied through the + pole. Also, the second comparator 705 may receive an input signal having a voltage level of 0.746451V through a second electrical path. The second electrical path may be connected to the -pole of the second comparator 705 . The second comparator 705 may output a second output signal of a low level when the reference voltage 0.2V according to the second specified condition is applied through the + pole.

According to an embodiment, the gate 707 may receive the first output signal and the second output signal. The gate 707 may output a third output signal based on the applied level of the first output signal and the level of the second output signal. The gate 707 may be an AND gate.

For example, when the gate 707 receives a high level first output signal from the first comparator 703 and a high level second output signal from the second comparator 705 , the gate 707 has a high level. A third output signal may be output. As another example, when at least one low-level signal exists in the applied first output signal and the second output signal, the gate 707 may output a low-level third output signal.

According to another embodiment, the gate 707 may be a nor gate. For example, the NO-R gate may receive a low-level first output signal from the first comparator 703 to which a reference voltage is applied through a negative pole according to a first specified condition. Also, the NO-R gate may receive a low-level second output signal from the second comparator 705 to which a reference voltage is applied through a negative pole according to a second specified condition. The NO R gate may output a third output signal having a high level when the levels of the first output signal and the second output signal are low levels. As another example, the gate 707 may output a low-level third output signal when at least one high-level signal is present in the applied first output signal and the second output signal.

According to an embodiment, the processor 709 may receive the third output signal output from the gate 707 through an interrupt terminal. The processor 709 may check a connection state between the ear connector 701 and the external device based on the applied third output signal.

For example, when the level of the received third output signal is a high level, the processor 709 may determine that the ear connector 701 and the plug of the external device are in a normal connection state. As another example, when the level of the applied third output signal is the low level, the processor 709 may determine that the ear connector 701 and the plug of the external device are in an abnormal connection state.

According to another embodiment, the processor 709 may display the confirmation result through a display (not shown) of the electronic device.

The electronic device according to various embodiments disclosed in this document may have various types of devices. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A , B, or C" each may include any one of, or all possible combinations of, items listed together in the corresponding one of the phrases. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish an element from other elements in question, and may refer elements to other aspects (e.g., importance or order) is not limited. It is said that one (eg, first) component is "coupled" or "connected" to another (eg, second) component, with or without the terms "functionally" or "communicatively". When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term “module” used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logic block, component, or circuit. can be used as A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

According to various embodiments of the present document, one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101) may be implemented as software (eg, the program 140) including For example, a processor (eg, processor 120 ) of a device (eg, electronic device 101 ) may call at least one command among one or more commands stored from a storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not include a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided as included in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store™) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly between smartphones (eg: smartphones) and online. In the case of online distribution, at least a part of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, module or program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. have. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, or omitted. or one or more other operations may be added.

Claims (20)

In an electronic device,
an ear connector into which the plug of the earphone is inserted;
outputting a first output signal by comparing an input signal applied from a first terminal connected to a sensing terminal included in the ear connector and a first electrical path and a reference voltage according to a first specified condition applied from a second terminal a first comparator;
By comparing an input signal applied from a third terminal connected to the sensing terminal through a second electrical path branched from one point of the first electrical path and a reference voltage according to a second specified condition applied from a fourth terminal, a second comparator for outputting a second output signal; and
It is electrically connected to the first comparator and the second comparator, and is connected to a plug of the earphone based on a first output signal output from the first comparator and a second output signal output from the second comparator An electronic device comprising a processor for determining a state. According to claim 1,
The ear connector is
and five terminals connected to the plug of the earphone. According to claim 1,
The processor is
detecting a change in the received first output signal to determine whether the earphone is connected to the electronic device;
An electronic device for detecting a change in the received second output signal to determine whether there is a foreign substance inside the ear connector. According to claim 1,
The first specified condition is,
reference voltage information for determining whether the earphone plug is connected to the electronic device under the condition set in the first comparator; and
The second specified condition is,
The electronic device which is reference voltage information for determining the presence or absence of foreign substances inside the ear connector under the condition set in the second comparator. 5. The method of claim 4,
The processor is
When the voltage level of the received first output signal is less than or equal to the reference voltage set under the first specified condition, it is determined that the plug of the earphone is connected to the electronic device,
When the voltage level of the received second output signal is equal to or less than the reference voltage set as the second specified condition, the electronic device determines that there is no foreign substance inside the ear connector. According to claim 1,
The sensing terminal is
An electronic device that is a left detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector. According to claim 1,
The processor is
An electronic device that receives the first output signal through a first interrupt terminal and receives a second output signal through a second interrupt terminal. In an electronic device,
an ear connector into which the plug of the earphone is inserted;
outputting a first output signal by comparing an input signal applied from a first terminal connected to a sensing terminal included in the ear connector and a first electrical path with a reference voltage according to a first specified condition applied from a second terminal a first comparator;
By comparing an input signal applied from a third terminal connected to the sensing terminal through a second electrical path branched from one point of the first electrical path and a reference voltage according to a second specified condition applied from a fourth terminal, a second comparator for outputting a second output signal;
A gate connected to the first comparator and the second comparator for outputting a third output signal based on a first output signal output from the first comparator and a second output signal output from the second comparator ); and
and a processor configured to check a connection state with a plug of the earphone based on a third output signal output from the gate. 9. The method of claim 8,
The processor is
Based on the third output signal received from the gate, a first state in which the connection state between the earphone plug and the ear connector is a normal connection state, and a second state in which the connection state between the earphone plug and the ear connector is an abnormal connection state An electronic device that checks one of two states. 9. The method of claim 8,
The ear connector is
and five terminals connected to the earphone plug. 9. The method of claim 8,
The sensing terminal is
an electronic device that is a left-side detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector. 9. The method of claim 8,
The gate is
An electronic device that is an AND gate. 9. The method of claim 8,
further comprising a display;
The processor is configured to output the confirmation result through the display. 9. The method of claim 8,
The processor is
The electronic device receives the third output signal from the gate through an interrupt terminal. In an electronic device,
display;
an ear connector into which the plug of the earphone is inserted;
outputting a first output signal by comparing an input signal applied from a first terminal connected to a sensing terminal included in the ear connector and a first electrical path and a reference voltage according to a first specified condition applied from a second terminal a first comparator;
By comparing an input signal applied from a third terminal connected to the sensing terminal through a second electrical path branched from one point of the first electrical path and a reference voltage according to a second specified condition applied from a fourth terminal, a second comparator for outputting a second output signal; and
It is connected to the display, the first comparator, and the second comparator, and based on a first output signal output from the first comparator and a second output signal output from the second comparator, and a processor for determining a connection state and outputting the determination result through the display. 16. The method of claim 15,
The ear connector is
and five terminals connected to the earphone plug. 16. The method of claim 15,
The sensing terminal is
an electronic device that is a left-side detection terminal (L-detection) connected to a left sound terminal included in the earphone plug among a plurality of terminals included in the ear connector. 16. The method of claim 15,
The first specified condition is,
reference voltage information for determining whether the earphone plug is connected to the electronic device under the condition set in the first comparator; and
The second specified condition is,
The electronic device which is reference voltage information for determining whether there is a foreign substance inside the ear connector under the condition set in the second comparator. 16. The method of claim 15,
The processor is
detecting a change in the received first output signal to determine whether the earphone is connected to the electronic device;
An electronic device for detecting a change in the received second output signal to determine whether there is a foreign substance inside the ear connector. 20. The method of claim 19,
The processor is
The electronic device outputs, through the display, one of the four connection states determined based on the determined presence or absence of the earphone connection and the determined presence or absence of a foreign substance inside the ear connector.

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