KR20130017441A - Earphone and mobile terminal system having earphone - Google Patents

Abstract

The present invention relates to an earphone and a mobile terminal system to which the earphone is applied. Earphones according to an embodiment of the present invention, a power supply for outputting a reference voltage, is connected to the ground, a microphone for receiving a voice signal, respectively connected to the power supply and the microphone, generated by dropping the reference voltage output from the power supply And a resistor which provides a voltage to the microphone, and a connector branched between the resistor and the microphone to transmit the voltage and the voice signal to the outside.

Description

Mobile terminal system with earphones and earphones {EARPHONE AND MOBILE TERMINAL SYSTEM HAVING EARPHONE}

The present invention relates to an earphone equipped with a remote control and a microphone, and a mobile terminal system to which the earphone is applied.

The terminal can move And may be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such terminals, it may be considered to improve the structural and / or software parts of the terminal.

Recently, as a mobile terminal provides complex and various functions, a function as a multimedia device of a mobile terminal to which an earphone equipped with a remote controller and a microphone is applied has become important. However, in earphones equipped with a remote controller and a microphone, the microphone does not operate when the remote controller button of the earphone is pressed.

An object of the present invention is to provide an earphone that can operate the remote control and the microphone at the same time and a mobile terminal system to which such earphone is applied.

Earphones according to an embodiment of the present invention, a power supply for outputting a reference voltage, is connected to the ground, a microphone for receiving a voice signal, respectively connected to the power supply and the microphone, by dropping the reference voltage output from the power supply A resistor may be provided to provide the generated voltage to the microphone, and a connector may be branched between the resistor and the microphone to transmit the voltage and the voice signal to the outside.

The voltage may be a bias voltage provided to the microphone by dividing the reference voltage according to a ratio between the resistance value of the resistor unit and the resistance value of the microphone.

The power supply unit is connected to the connector to receive the voltage from the outside to output the reference voltage.

The resistor unit may be configured of a plurality of resistors or a variable resistor so that the resistance value can be varied.

A plurality of switches may be connected to the plurality of resistors, respectively, and resistance values of the resistor unit may be adjusted according to turning off of the plurality of switches.

The electronic device may further include a second resistor unit branched between the resistor unit and the microphone to be selectively connected to the ground to adjust the output direction of the voice signal.

The connector may be detachable from the interface unit of the mobile terminal to transfer the voltage and the voice signal to the mobile terminal.

The mobile terminal system according to an embodiment of the present invention may include a mobile terminal body having an interface unit and earphones detachable from the interface unit, wherein the earphone is connected to a power supply unit for outputting a reference voltage and a ground. And a microphone for receiving a voice signal, connected to the power supply unit and the microphone, respectively, a resistor unit providing a voltage generated by dropping a reference voltage output from the power supply unit to the microphone, and the voltage and the voice signal. And a connector branched between the resistor and the microphone so as to be delivered to the mobile terminal.

According to the mobile terminal system to which the earphone and the earphone are applied according to an embodiment of the present invention, the resistor unit is implemented as a pull-up circuit, so that a voice signal received from the microphone is transmitted to the mobile terminal even when a current flows in the resistor unit. Can be.

Therefore, the user of the present invention can control the function of the mobile terminal by adjusting the resistance value of the resistor unit by using the key input unit of the remote controller and input a voice signal to the microphone.

1 is a block diagram illustrating a mobile terminal according to the present invention.
2A and 2B are perspective views showing the appearance of a mobile terminal related to the present invention.
3 is a block diagram illustrating a mobile terminal system to which an earphone is applied according to an embodiment of the present invention.
4 is a circuit diagram illustrating an earphone according to an embodiment of the present invention.
5 is a circuit diagram showing an earphone according to another embodiment of the present invention.
6 is a circuit diagram showing an earphone according to another embodiment of the present invention.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

1 is a block diagram illustrating a mobile terminal 100 according to the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a detection unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may refer to a server for generating and transmitting broadcast signals and / or broadcast related information, or a server for receiving broadcast signals and / or broadcast related information generated by the broadcast management server and transmitting the generated broadcast signals and / or broadcast related information. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may refer to a broadcast channel, a broadcast program, or information related to a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 may include, for example, Digital Multimedia Broadcasting-Terrestrial (DMB-T), Digital Multimedia Broadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO), and Digital Video Broadcast (DVB-H). Digital broadcast signals can be received using digital broadcasting systems such as Handheld and Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems as well as the digital broadcasting system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof is a Global Position System (GPS) module.

Referring to FIG. 1, an A / V (Audio / Video) input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ Two or more cameras 121 may be provided depending on the use environment.

The microphone 122 receives an external sound signal through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in receiving an external sound signal.

The user input unit 130 generates input data for a user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The detector 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a position of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate a detection signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may detect whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be detected. Meanwhile, the detector 140 may include a proximity sensor 141.

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). and at least one of a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

When the display unit 151 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 151 may be configured in addition to an output device. Can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded by the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152, so that they 151 and 152 may be classified as part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to vibration, the haptic module 154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet port, grazing to the skin surface, contact of an electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 154 may not only deliver a tactile effect through direct contact, but may also be implemented so that a user may feel the tactile effect through a muscle sense such as a finger or an arm. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), a RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user may be transferred. It may be a passage that is delivered to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. The control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the control unit 180 or may be implemented separately from the control unit 180. [

The controller 180 may perform a pattern recognition process for recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

The various embodiments described herein may be embodied in a recording medium readable by a computer or similar device using, for example, software, hardware, or a combination thereof.

According to a hardware implementation, the embodiments described herein include Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions. These may be implemented by the controller 180.

According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that perform at least one function or operation. The software code may be implemented by a software application written in a suitable programming language. The software codes are stored in the memory 160 and can be executed by the control unit 180. [

Figure 2a is a front perspective view showing the appearance of a mobile terminal 100 according to the present invention.

The disclosed mobile terminal 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body includes a case (a casing, a housing, a cover, and the like) which forms an appearance. In this embodiment, the case may be divided into a front case 101 and a rear case 102. A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102. [

The cases may be formed by injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The display unit 151, the audio output unit 152, the camera 121, the user input unit 130 (see FIG. 1), the microphone 122, the interface 170, and the like are disposed in the terminal body, mainly the front case 101. Can be.

The display unit 151 occupies most of the main surface of the front case 101. The sound output unit 151 and the camera 121 are disposed in regions adjacent to one end of both ends of the display unit 151, and the first user input unit 131 and the microphone 122 are disposed in regions adjacent to the other end. . The second user input unit 132 and the interface 170 may be disposed on side surfaces of the front case 101 and the rear case 102.

The user input unit 130 is manipulated to receive a command for controlling the operation of the portable terminal 100 and may include a plurality of operation units 131 and 132. The first or second manipulation units 131 and 132 may also be collectively referred to as manipulating portions, and may be employed in any manner as long as the user operates in a tactile manner.

The content input by the first or second manipulation units 131 and 132 may be variously set. For example, the first operation unit 131 receives a command such as start, end, scroll, and the like, and the second operation unit 132 adjusts the volume of the sound output from the sound output unit 152 or the display unit 151. Command), such as switching to the touch recognition mode.

2b is a rear perspective view showing the appearance of a mobile terminal 100 according to the present invention.

Referring to FIG. 2B, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2A), and may be a camera having different pixels from the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body such that they can be rotated or pop-up.

A flash 123 and a mirror 124 are further disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output unit 152 'may implement the stereo function together with the sound output unit 152 (see FIG. 2A), and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for talking and the like, a broadcast signal reception antenna 116 may be additionally disposed on the side of the terminal body. The antenna 116 constituting a part of the broadcast receiving module 111 (refer to FIG. 1) may be installed to be pulled out from the terminal body.

The terminal body is equipped with a power supply unit 190 for supplying power to the portable terminal 100. The power supply unit 190 may be built in the terminal body or may be directly detachable from the outside of the terminal body.

The rear case 102 may further include a touch pad 135 for sensing a touch. Like the display unit 151, the touch pad 135 may be configured to have a light transmissive type. In addition, a rear display unit for outputting visual information may be additionally mounted on the touch pad 135. In this case, information output from both the front display unit 151 and the rear display unit may be controlled by the touch pad 135.

The touch pad 135 operates in association with the display unit 151 of the front case 101. The touch pad 135 may be disposed parallel to the rear of the display unit 151. The touch pad 135 may have a size equal to or smaller than that of the display unit 151.

Hereinafter, the earphone 200 that can be connected to the mobile terminal 100 and the mobile terminal system 1000 to which the earphone 200 is applied will be described with reference to the accompanying drawings.

3 is a block diagram illustrating a mobile terminal system 1000 in which an earphone 200 according to an embodiment of the present invention is applied to a mobile terminal 100.

Referring to FIG. 3, the mobile terminal 100 may include an interface unit 170 and a controller 180, and the earphone 200 may include a power supply 210, a resistor 220, a microphone 230, and a connector. 240, first and second speakers 251 and 252.

The power supply unit 210 supplies a reference voltage to the resistor unit 220. The power supply unit 210 may supply a voltage supplied from the outside to the resistor unit 220, or may supply a voltage generated by itself to the resistor unit 220.

Specifically, the power supply unit 210 may be connected to the connector 240 to receive a voltage from the outside to supply a reference voltage to the resistor unit 220. In detail, the wiring of the power supply unit 210 may be branched between the connector 240 and the first speaker 251. In addition, the wiring of the power supply unit 210 may be branched between the connector 240 and the second speaker 252 (see FIGS. 4 to 6).

Meanwhile, the power supply unit 210 may generate a voltage by itself and supply a reference voltage to the resistor unit 220. To this end, generally, batteries or rechargeable batteries may be used. In the case of a battery, a small coin type cell may be used. In addition, various methods may be used in which a voltage may be generated by itself, such as a small self-generator or a solar cell.

The microphone 230 is connected to ground and receives a voice signal from the outside.

The resistor unit 220 is connected to the power unit 210 and the microphone 230, respectively. That is, the resistor unit 220 may be implemented as a pull-up circuit connected to the power supply unit 210.

A pull-up circuit is a circuit in which a resistor is located between a signal input or output terminal and a power supply terminal. On the other hand, a pull-down circuit means a circuit in which a resistor is located between an input or output terminal of a signal and a ground terminal.

The resistor unit 220 provides the microphone 230 with a voltage generated by dropping the reference voltage output from the power supply unit 210. Here, the voltage refers to a bias voltage provided to the microphone 230 among the divided voltages when the reference voltage is divided according to the ratio of the resistance value of the resistor unit 220 and the resistance value of the microphone 230.

The user may control the function of the mobile terminal 100 by manipulating the resistance value of the resistor unit 220 using a key input unit (for example, a button or a touch pad) (not shown) of the remote controller. Specifically, the function of the mobile terminal 100 may include a music playback function such as play, pause, stop, fast forward, rewind, volume control, etc. In addition, voice recording, screen size of the mobile terminal 100 or It may include functions such as brightness control.

If the resistor unit 220 is connected to ground and implemented as a pull-down circuit, that is, if the resistor unit 220 and the microphone 230 are connected in parallel, a current flows in the resistor unit 220. At this time, the microphone 230 may not be driven properly. This is because the resistance of the microphone 230 is much larger than the resistance of the resistor 220. Therefore, while the user controls the function of the mobile terminal 100 using the key input unit of the remote control, the voice signal received from the microphone 230 may not be transmitted to the mobile terminal 100.

However, as described above, when the resistor unit 220 is implemented as a pull-up circuit, a predetermined voltage may be applied to the microphone 230 even though a current flows through the resistor unit 220. Therefore, even when a current flows through the resistor unit 220, the voice signal received from the microphone 230 may be transmitted to the mobile terminal 100. Therefore, the user may control the function of the mobile terminal 100 by using a key input unit of the remote controller and input a voice signal to the microphone 230.

The first and second speakers 251 and 252 output voice signals received from the mobile terminal 100. The first and second speakers 251 and 252 may be formed of voice coils. A voice coil is a component that makes a sound by transmitting vibration generated by the interaction of a magnetic field generated by electric current and a magnetic field generated in a permanent magnet to the diaphragm.

The connector 240 may include a first speaker terminal L, a second speaker terminal R, a ground terminal G, and a microphone terminal M. FIG.

The connector 240 having such a configuration may transmit a voice signal transmitted from the controller 180 of the mobile terminal 100 to the first and second speakers 251 and 252 of the earphone 200. In addition, the connector 240 may transfer the voice signal received from the microphone 230 of the earphone 200 and the bias voltage provided to the microphone 230 to the controller 180 of the mobile terminal 100.

To this end, the connector 240 may be made detachable to the interface unit 170 of the mobile terminal 100. The connector 240 is connected to the interface unit 170 of the mobile terminal 100 and is in contact with each signal line of the interface unit 170.

In more detail with respect to the interface unit 170, the first speaker terminal L of the connector 240 is connected to the first speaker signal line 171 connected to the L port of the controller 180 of the mobile terminal 100. Connected. Accordingly, the voice signal output from the L port of the controller 180 is transmitted to the first speaker terminal L through the first speaker signal line 171.

The second speaker terminal R of the connector 240 is connected to the second speaker signal line 172 connected to the R port of the controller 180. Accordingly, the voice signal output from the R port of the controller 180 is transmitted to the second speaker terminal R through the second speaker signal line 172.

The ground terminal G of the connector 240 is connected to the ground through the ground line 173 of the interface unit 170.

The microphone terminal M of the connector 240 is connected to the microphone signal line 174 connected to the M port of the controller 180. Accordingly, the voice signal and the bias voltage output from the microphone terminal M are transmitted to the controller 180 through the microphone signal line 174. Here, the bias voltage is changed according to the resistance value of the resistor unit 220. The controller 180 may recognize a command (control signal) of the remote controller based on the received bias voltage.

Specifically, the memory 160 (see FIG. 1) of the mobile terminal 100 stores information matching the functions of the mobile terminal 100 according to the voltage received from the earphone 200. The controller 180 controls the operation of the mobile terminal 100 by referring to the received voltage and matching information of the memory 160.

In addition, the controller 180 limits the functions of the sound output module 152 and the microphone 122 of the mobile terminal 100 when the connector 240 of the earphone 200 is connected to the interface unit 170. That is, the controller 180 may deactivate the power output to the sound output module 152 and the microphone 122 to deactivate the sound output module 152 and the microphone 122.

4 is a circuit diagram illustrating an earphone 200 according to an embodiment of the present invention.

Referring to FIG. 4, the resistor unit 220 of the earphone 200 may be configured of a plurality of resistors R1 to R4 such that the resistance value may be changed. In addition, a plurality of switches S1 to S4 are connected to the plurality of resistors R1 to R4, respectively, and are turned on and turn off of the plurality of switches S1 to S4. Accordingly, the resistance value of the resistor unit 220 may be adjusted. The switches S1 to S4 may be connected to a key input unit (not shown) of the remote controller. The number of resistors R1 to R4 and the switches S1 to S4 is not limited thereto and may be variously modified.

Therefore, when an input is not detected at the key input unit of the remote controller, that is, when all of the switches S1 to S4 are turned off, the bias of the microphone 230 is applied to the mobile terminal 100 (see FIG. 1). The voltage is delivered as it is. In addition, when an input is detected in the key input unit of the remote controller, that is, when at least one of the switches S1 to S4 is turned on, the bias voltage of the microphone 230 is converted to the mobile terminal 100. Is passed to.

In detail, the plurality of switches S1 to S4 are connected to the plurality of resistors R1 to R4 having different resistance values. Usually, the plurality of switches S1 to S4 are turned off, and as at least one of the plurality of switches S1 to S4 is turned on, the resistor is connected to the microphone 230. And a voltage dropped in accordance with the resistance of the resistor (the bias voltage of the microphone 230) is provided to the microphone 230.

In this case, the bias voltage of the microphone 230 is transmitted to the mobile terminal 100 through a path through which the voice signal input from the microphone 230 is output. Therefore, the earphone 200 according to the embodiment of the present invention does not need a separate transmission path for transferring the bias voltage of the microphone 230 to the mobile terminal 100.

5 is a circuit diagram illustrating an earphone 200 according to another embodiment of the present invention.

Referring to FIG. 5, the resistor unit 220 of the earphone 200 may be configured as a variable resistor VR so that a resistance value may be changed. The variable resistor VR is a resistor made so that the resistance value can be easily changed. In general, the continuous variable resistor VR changes the resistance value by adjusting the length of the resistor while the contactor contacts the resistor.

Specifically, the variable resistor VR is connected to a rotary button (not shown), the resistance value of the resistor unit 220 may be adjusted according to the amount of rotation of the rotary button. Therefore, the voltage dropped to the microphone 230 is provided in accordance with the resistance value which is changed by the operation of the rotary button.

Although not shown, a switch may be connected to the variable resistor VR. In this case, whether the variable resistor VR is operated may be adjusted according to the turn on and turn off of the switch.

In addition, although not shown, the resistor unit 220 may include both the resistors R1 to R4 and the variable resistor VR.

At this time, the resistance value of the resistor unit 220 is adjusted according to the turn on and turn off of the plurality of switches S1 to S4 connected to the plurality of resistors R1 to R4, respectively. As a result, the function of the mobile terminal 100 (see FIG. 1) may be controlled. In addition, the variable resistor VR may operate as volume control dials of the first and second speakers 251 and 252.

6 is a circuit diagram showing an earphone 200 according to another embodiment of the present invention.

Referring to FIG. 6, the resistor unit 220 (hereinafter, referred to as a “first resistor unit”) of the earphone 200 may be configured of a plurality of resistors R1 to R4 so that the resistance value can be varied. . In addition, a plurality of switches S1 to S4 are connected to the plurality of resistors R1 to R4, respectively, and are turned on and turn off of the plurality of switches S1 to S4. Accordingly, the resistance value of the first resistor unit 220 may be adjusted.

As shown in the drawing, the first resistor unit 220 may be implemented as a pull-up circuit including a power supply unit 210 for supplying power and a plurality of resistors R1 to R4. The number of resistors R1 to R4 is not limited thereto and may be variously modified.

In addition, the earphone 200 may further include a second resistor unit 221 branched between the first resistor unit 220 and the microphone 230 and selectively connected to the ground.

As shown in the drawing, the second resistor unit 221 may be implemented as a pull-down circuit composed of a resistor R5 connected to the ground. The number of resistors R5 is not limited thereto, and may be variously modified.

Since the first resistor unit 220 is implemented as a pull-up circuit, a predetermined voltage may be applied to the microphone 230 even though a current flows in the first resistor unit 220. Therefore, even when a current flows through the first resistor unit 220, the voice signal received from the microphone 230 may be transmitted to the mobile terminal 100 (see FIG. 1).

Meanwhile, since the second resistor unit 221 is implemented as a pull-down circuit, when a current flows in the second resistor unit 221, for example, a switch connected to the resistor R5 of the second resistor unit 221 ( When S5 is turned on, the voice signal input from the microphone 230 may be blocked from being transmitted to the mobile terminal 100.

As described above, the earphone 200 includes both the first resistor unit 220 implemented as a pull-up circuit and the second resistor unit 221 implemented as a pull-down circuit. The user of the present invention may control a function of the mobile terminal 100 that varies depending on the resistance value of the first resistor unit 220 and input a voice signal to the microphone 230.

In addition, the user of the present invention by turning on or off the switch (S5) of the second resistor unit 221, the output direction of the audio signal input to the microphone 230, that is, The operation of the microphone 230 may be controlled.

Further, according to the embodiment disclosed herein, the above-described method can be implemented as a code that can be read by a processor on a medium on which the program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The mobile terminal described above can be applied to not only the configuration and method of the embodiments described above but also all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments It is possible.

Claims (8)

A power supply unit for outputting a reference voltage;
A microphone connected to the ground and receiving a voice signal;
A resistor unit connected to each of the power unit and the microphone, the resistor unit providing a voltage generated by lowering a reference voltage output from the power unit to the microphone; And
And a connector branched between the resistor unit and the microphone to transmit the voltage and the voice signal to the outside. The method of claim 1,
The voltage is,
And the reference voltage is divided according to a ratio of the resistance value of the resistor portion to the resistance value of the microphone, thereby providing a bias voltage provided to the microphone. The method of claim 1,
The power supply unit,
Earphones, characterized in that connected to the connector to receive the voltage from the outside to output the reference voltage. The method of claim 1,
The resistance unit,
Earphones, characterized in that consisting of a plurality of resistors or a variable resistor so that the resistance value is variable. The method of claim 4, wherein
A plurality of switches are connected to each of the plurality of resistors,
Earphones characterized in that the resistance value of the resistor is adjusted according to the turn off of the plurality of switches. The method of claim 1,
Earphones, characterized in that further comprising a second resistor portion branched between the resistor portion and the microphone selectively connected to the ground to adjust the output direction of the voice signal. The method of claim 1,
Wherein the connector comprises:
The earphone of claim 1, wherein the earphone is detachable so as to transfer the voltage and the voice signal to the mobile terminal. A mobile terminal body having an interface unit; And
Includes an earphone that is detachable to the interface unit,
The earphone,
A power supply unit for outputting a reference voltage;
A microphone connected to the ground and receiving a voice signal;
A resistor unit connected to each of the power unit and the microphone, the resistor unit providing a voltage generated by lowering a reference voltage output from the power unit to the microphone; And
And a connector branched between the resistor unit and the microphone to transfer the voltage and the voice signal to the mobile terminal.

Images