KR200286903Y1 - Multifunctional Charger of Mobile Phone - Google Patents

Abstract

The present invention relates to a multi-function charger of a mobile terminal, in particular the present invention and a key input unit for generating a key signal for indicating a specific operation; A DTMF receiver connected to the mobile terminal through an earphone jack and receiving a DTMF signal applied through a keypad of the mobile terminal and transmitting the received DTMF signal to the CPU; It is connected to the key input unit, receives various key signals applied from the key input unit, performs an operation corresponding to the key signal, receives the DTMF signal applied through the DTMF receiving unit, calls through the PSTN network, and communicates with the mobile terminal. A CPU which performs data transmission / reception, and collectively controls each component to perform an incoming / outgoing call function with the PSTN network; And located between the CPU and the PSTN network, and includes a telephone function performing unit for performing a general telephone call function. Therefore, according to the present invention, it is possible to use a variety of services while charging by adding a call function, a caller information display function, an incoming call signal display function, a volume control speakerphone function, and the like using a mobile terminal keypad to a battery charger of the mobile terminal. have.

Description

Multifunctional charger of mobile terminal

The present invention relates to a multifunctional charger of a mobile terminal, and more particularly, a call function, a caller identification display (CID) function, an incoming call signal display function, and a volume control using a keypad of a mobile terminal in a battery charger of the mobile terminal. The present invention relates to a multifunctional charger of a mobile terminal which can use various services even while charging by adding a speakerphone function and the like.

When the battery supplying the operating power of the mobile terminal is discharged after being used for a certain time due to the limitation of capacity, the battery charging operation must be performed through the charger. These mobile terminal chargers can use both a desktop charger using household AC power, a car charger using a cigar jack of a vehicle, a travel charger that can be easily charged when going out for a long time such as travel or business trip, and both a home power source and a DC power source. There is a dual charger. Since the mobile terminal charger simply has a charging function, when a call is made while the battery of the mobile terminal is being charged, the user has to trouble separate and call the mobile terminal mounted in the charger. In addition, even when a user wants to talk while the mobile terminal is mounted on the charger, the user has a problem in that the mobile terminal mounted on the charger needs to be separated.

Recently, a mobile terminal provides various services for the convenience of a user, and in particular, a mobile network exchange provides a caller information display (CID) service that provides information such as a caller's telephone number and a call time. In order to provide the CID service, the base station transmits a feature notification message of a paging channel and an alert message with information of a forward traffic channel and a flash message having information. Is transmitted to the mobile terminal. The three messages described above contain the information described in the following table.

field Length in bits Number type (NUMBER_TYPE) 3 Number Plane (NUMBER_PLANE) 4 Expression indicator (PI) 2 Screen indicator (SI) 2 Character (CHARi), (i≥0) 8 Reserved 5

Caller information consists of number type, number plane, expression indicator, screen indicator, character, and reserve fields as shown in the table above. Among these, the number type field indicates a number type such as an international number, a terminal number, and a speed dial number, and the number plane field indicates a service network number provided such as ISDN, Telex, etc., and an expression indicator field. Indicates whether or not to display the number, or not, and the character indicates the caller's telephone number.

However, since the CID service is provided to the mobile terminal, when the mobile terminal is installed in the charger, the CID service cannot be usefully used during charging since the charger needs to be moved or separated from the charger.

As described above, since a conventional mobile terminal charger is mostly equipped with only a charging function, a new type of mobile terminal charger capable of providing a quality service to a user by adding a function to make a call during charging is required. . Furthermore, it is necessary to implement a multi-function charger that includes a variety of functions, such as performing the charging function and the call function, caller information display function, incoming call display function, volume control speakerphone function.

Accordingly, the present invention has been made to solve the conventional problems as described above, the first object of the present invention is equipped with a module capable of performing a telephone function, and at the same time charging while performing a charging function of the mobile terminal By entering the other party's phone number using the keypad of the mobile terminal, a telephone call (that is, an outgoing call) is made through the PSTN network, and a call path is formed according to a call request from the outside entered through the PSTN. The present invention provides a multifunctional charger of a mobile terminal in the form of a general telephone capable of conducting a call (ie, an incoming call).

The second object of the present invention is to perform the charging function of the mobile terminal and at the same time, when the incoming signal arrives to the mobile terminal during charging, and visually notifies the fact by using a display element (for example, LED) and at the same time the earphone jack of the mobile terminal It is to provide a multi-function charger of the mobile terminal that can exchange the voice signal through.

A third object of the present invention is to receive and display caller information (eg, caller name, caller's phone number, call time) when an incoming call is received from the outside while the mobile terminal is equipped with a CID service function. The present invention provides a multifunctional charger for a mobile terminal.

A fourth object of the present invention is to provide a multifunctional charger of a mobile terminal further comprising a speakerphone function and a power regulation function.

1 is a perspective view showing an external configuration of a multifunctional charger of a mobile terminal according to the present invention,

2 is a use state diagram showing a connection state of the multi-function charger and the mobile terminal according to the present invention,

3 is a block diagram showing the internal configuration of the multi-function charger according to the present invention and the connection relationship with the mobile terminal,

4 is a flowchart illustrating a transmission operation using a charging and mobile terminal keypad of the multifunctional charger according to the present invention,

Figure 5 is a flow chart illustrating the operation relationship between the multi-function charger and the mobile terminal period when the charging of the multi-function charger and the mobile terminal according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

100: multi-function charger 200: mobile terminal

305: power supply unit 310: charging circuit unit

315: key input unit 320: hook on / off switch unit

325: CPU 330: charging and communication interface unit

335: voice signal interface unit 337: relay drive unit

338: DTMF receiver 340: Transmission signal amplifier

345: receiving signal amplifier 350: voice codec and amplifier

355: memory unit 360: charge state display unit

365: incoming signal display unit 370: display unit

375: phone function execution unit 380: incoming signal detection unit

The present invention for achieving the above object is to supply a charging power to the operating power source and the battery of the mobile terminal, including a power supply unit, a charging circuit unit, in the mobile terminal charger made of a general phone shape including a handset, A key input unit for generating a key signal for indicating; A DTMF receiver connected to the mobile terminal through an earphone jack and receiving a DTMF signal applied through a keypad of the mobile terminal and transmitting the received DTMF signal to the CPU; It is connected to the key input unit, receives various key signals applied from the key input unit, performs an operation corresponding to the key signal, receives the DTMF signal applied through the DTMF receiving unit, calls through the PSTN network, and communicates with the mobile terminal. A CPU which performs data transmission / reception, and collectively controls each component to perform an incoming / outgoing call function with the PSTN network; And located between the CPU and the PSTN network, characterized in that it comprises a telephone function performing unit for performing a general telephone call function.

In addition, the present invention supplies a charging power to the operating power and the battery of the mobile terminal, including a power supply unit, a charging circuit unit, and a mobile terminal charger having a general phone shape including a handset, a key signal for indicating a specific operation A key input unit for generating a; It is connected to the key input unit, receives various key signals applied from the key input unit, performs an operation corresponding to the key signal, receives DTMF signals applied through the keypad of the mobile terminal, and makes a call through the PSTN network. A CPU which collectively controls each component to perform a data transmission / reception operation with the CPU; A charging and communication interface unit located between the mobile terminal and the CPU, connected to the charging circuit unit, and configured to adjust a data format, an operation speed, and an operation timing to exchange various data between the mobile terminal and the CPU; A voice signal interface unit for switching the mobile terminal and the voice signal to be exchanged with each other through a designated path; A relay driver connected to the mobile terminal, the CPU, and the voice signal interface unit and switching to apply or block the voice signal applied from the mobile terminal to the voice signal interface unit by a relay drive signal of the CPU; A DTMF receiver connected to the mobile terminal through an earphone jack and receiving a DTMF signal applied through a keypad of the mobile terminal and transmitting the received DTMF signal to the CPU; A transmission signal amplifier connected to the voice signal interface unit and amplifying a voice signal applied from the voice signal interface unit and outputting the amplified voice signal to the first speaker; A received signal amplifier for amplifying the voice signal captured by the first microphone and transmitting the amplified voice signal to the voice signal interface unit; It is connected to the CPU and the voice signal interface unit, and amplifies the voice signal applied from the voice signal interface unit to the set size and outputs it to the second speaker, and amplifies the voice signal captured through the second microphone to the voice signal interface unit. Voice codec and amplification, which converts the digital voice data applied from the CPU into an analog voice signal and outputs it to the second speaker, and converts the analog voice signal captured through the second microphone into processable digital data and delivers it to the CPU. Wealth; A memory unit connected to the CPU and storing caller information applied through the CPU and storing a telephone number input through a key input unit; A display unit connected to the CPU and displaying caller information and a telephone number input by the user; And located between the CPU and the PSTN network, characterized in that it comprises a telephone function performing unit for performing a general telephone call function.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the multi-function charger of the mobile terminal according to the present invention will be described in detail.

1 is a perspective view showing an external configuration of a multifunctional charger 100 of a mobile terminal according to the present invention.

The multi-function charger 100 includes a main body 110, a speaker, and a microphone, which protects internal circuits from external force, and outputs a voice signal received from a mobile terminal through a speaker and outputs a user's voice signal through a microphone. Capture and transmit to mobile terminal, handset 120 for exchanging voice signal through PSTN, incoming signal display unit 130 for visually notifying the fact when incoming signal is received, caller information (eg caller name, caller) LCD 140 for displaying the phone number, etc.) and other information (eg, input keypad number, missed received phone information, etc.), mobile terminal insertion hole 150 for accommodating the mobile terminal, and visually displays the charging status. Charge state display unit 160 to, the call button for generating a key signal for indicating the call enabled state of the multi-function charger 100 (165) ), The speakerphone button 170 for generating a key signal for performing the speakerphone function, the volume button 180 for adjusting the volume when performing the speakerphone function, AC / for supplying power required for the operation of the multifunction charger 100. A DC adapter 185, an earphone jack 190 for transmitting and receiving DTMF signals and voice signals to and from a mobile terminal, and a connector 195a for connecting to a communication port of the mobile terminal, and for charging a battery of the mobile terminal. And a communication cable 195 for supplying power and exchanging data (e.g., ring signal, CID information, voice data, etc.), and a telephone plug 197 for connecting to a PSTN network.

In addition, a hook on / off switch (not shown) protrudes from the seating groove 125 of the handset 120 to transmit a hook on / off signal according to whether the handset 120 is seated, and performs a speakerphone function. A separate speaker and microphone are built in. The position of each component shown in FIG. 1 is merely exemplary and may be freely changed according to a designer's choice. For example, when the CID function is excluded from the functions (ie, the dial function, the CID function, the incoming call display function, and the speakerphone function) that can be implemented in the multifunction charger, the LCD 140 may be omitted. Various buttons (that is, the call button 165, the speaker phone button 170, and the volume button 180) located in the main body 110 may be implemented inside the handset 120.

Figure 2 is a state diagram showing the connection state of the multi-function charger and the mobile terminal according to the present invention. First, the mobile terminal 200 to be charged is mounted on the mobile terminal insertion port 150, and the earphone jack 190 of the multifunction charger 100 is connected to the earphone jack insertion port 210 of the mobile terminal 200, The connector 195a is connected to the communication port 220 of the mobile terminal 200. In addition, the plug of the AC / DC adapter 185 is connected to an AC power outlet, and the telephone plug 197 is connected to a telephone outlet. Therefore, the power is connected and the connector 195a is connected to the communication port 220 of the mobile terminal 200 and at the same time charging of the mobile terminal 200 is started, and the multifunction charger 100 is connected to the PSTN network. The call becomes available.

3 is a block diagram showing the internal configuration of the multi-function charger 100 and the connection relationship with the mobile terminal 200 according to the present invention, the multi-function charger 100 is a power supply unit 305, charging circuit unit 310, key input unit 315, hook on / off switch unit 320, CPU 325, charging and communication interface unit 330, voice signal interface unit 335, relay driver 337, DTMF receiver 338, transmission signal Amplifying unit 340, received signal amplifying unit 345, voice codec and amplifying unit 350, memory unit 355, charging status display unit 360, incoming call signal display unit 365, display unit 370 and telephone It is configured to include a function performing unit 375. In addition, the incoming signal detection unit 380 may be further included, and the key input unit 315 may include a call button 315a, a speakerphone button 315b, and a volume button 315c.

The power supply unit 305 receives DC power input through the AC / DC adapter 185 of FIG. 1 and supplies a voltage required for the operation of the multifunction charger to each component, and the charging circuit unit 310 Receives a DC power input through the AC / DC adapter 185 serves to supply a voltage for charging the battery of the mobile terminal. The charging circuit unit 310 uses a charging circuit used in a general charger, which is well known to those skilled in the art.

The key input unit 315 serves to generate a key signal for instructing a specific operation, a call button 315a for notifying that the multifunction charger is in a transceivable state and transmitting / receiving a speakerphone function when transmitting and receiving. The speakerphone button 315b and a volume button 315c for adjusting the size of the input / output voice signal.

The hook on / off switch unit 320 generates a hook on / off signal according to whether the handset is settled to notify that the transmission and reception wait state. That is, the present invention is implemented to transmit and receive after the multi-function charger is switched to the hook-off state during transmission and reception. Of course, the speakerphone button 315c may be pressed to switch the state of the multifunction charger to the hook-off state. The hook on / off signal generated by the hook on / off switch unit 320 is a CPU 325 which will be described later to determine the current state of the multi-function charger 100 and transmits this fact to the mobile terminal 200 or the PSTN network. It is for recognizing the available call state and is a preliminary means for accurately knowing the intention of the user.

The CPU 325 is connected to the key input unit 315 and the hook on / off switch unit 320, and various key signals (for example, each of which are applied from the key input unit 315 and the hook on / off switch unit 320). And a button signal and a hook on / off signal) to collectively control each component to perform data transmission / reception with the mobile terminal 200. That is, the CPU 325 is programmed to perform a call function, a CID function, an incoming call display function, and a speakerphone function using a mobile terminal keypad implemented in the multifunctional charger 100, and various control signals for performing these functions. Control to send to the component.

The charging and communication interface unit 330 is located between the mobile terminal 200 and the CPU 325 and connected to the charging circuit unit 310, and the mobile terminal 200 is connected to the mobile terminal 200 through the communication cable 195. Is connected to the communication port 220. The charging and communication interface unit 330 applies the charging power applied from the charging circuit unit 310 to the mobile terminal 200, the data format to exchange various data between the mobile terminal 200 and the CPU 325, It controls the operation speed and operation timing. As a communication standard between the mobile terminal 200 and the charging and communication interface unit 330, RS-232C, RS-422, or RS-485 may be used. In general, the RS-232C communication standard is widely used. The aforementioned communication standard is well known to those skilled in the art, so detailed description thereof will be omitted. The pin arrangement and structure of the communication port 220 of the mobile terminal 200 are different for each terminal model, but the communication port 220 is a charging terminal, a data transmitting / receiving terminal, a connection detecting terminal for performing a function of the multi-function charger. It is assumed that a ring detection terminal is included.

The voice signal interface unit 335 is positioned between the mobile terminal 200 and the CPU 325 and is connected to the earphone jack insertion port 210 of the mobile terminal 200 through the earphone jack 190 with the mobile terminal 200. The voice signal interface unit 335 adjusts the data format, operation speed, and operation timing of the voice signal applied from the mobile terminal 200 and the voice signal transmitted to the mobile terminal 200. Here, the earphone jack 190 includes a ground terminal, a microphone terminal, a speaker terminal.

The relay driver is connected to the mobile terminal 200, the CPU 325, and the voice signal interface unit 335, and the voice signal interface receives a voice signal applied from the mobile terminal 200 by a relay driving signal of the CPU 325. Switch to apply or block to the unit (335).

The DTMF receiver 338 is connected through the mobile terminal 200 and the earphone jack 190, and serves to receive and transmit a DTMF signal applied through the keypad of the mobile terminal 200 to the CPU 325. . The DTMF signal applied from the mobile terminal 200 is converted into an electrical signal through the earphone jack 190 and applied. When the DTMF signal is applied through the DTMF receiver 338, the CPU 325 may apply a relay driving signal to the relay driver 337 to provide a voice between the multifunction charger 100 and the mobile terminal 200 through the earphone jack 190. Control to block the call.

The transmission signal amplifying unit 340 is connected to the voice signal interface unit 335, and amplifies a voice signal applied from the mobile terminal 200 through the voice signal interface unit 335 so as to amplify the first speaker (multifunctional charger 100). Built into the handset 120 implemented in the)] and serves to output. The received signal amplifying unit 345 amplifies the voice signal captured by the first microphone (built in the handset 120 implemented in the multifunctional charger 100) to the mobile terminal 200 through the voice signal interface unit 335. It serves to deliver.

The voice codec and amplifying unit 350 is interconnected with the CPU 325 and the voice signal interface unit 335, and performs a function of a speakerphone. That is, the voice signal applied from the voice signal interface unit 335 is amplified to the set size and output to the second speaker (built in the multi-function charger main body 110), and the second microphone (built into the multi-function charger main body 110). The amplified voice signal is amplified and transmitted to the voice signal interface unit 335. The present invention may exchange voice signals with the mobile terminal 200 through the earphone jack 190, but may exchange voice signals with the mobile terminal 200 through the communication cable 195. In this case, when the voice signal is exchanged through the communication cable 195, communication is performed through the CPU 325, and thus the data format needs to be adjusted. That is, the voice codec and amplifying unit 350 converts the digital voice data applied from the CPU 325 into an analog voice signal and outputs the analog voice signal to the second speaker, and the digital data capable of processing the analog voice signal captured through the second microphone. Is converted to and transferred to the CPU 325.

The memory unit 355 is interconnected with the CPU 325 and stores the caller information and the input telephone number applied through the CPU 325, and applies the corresponding data according to the extraction command of the CPU 325. Do this.

Charge state display unit 360 is connected to the CPU 325, serves to display the state of charge of the battery of the mobile terminal 200 to the outside, and uses an LED. For example, it may be implemented to display red during charging and to display green when charging is completed.

The incoming signal display unit 365 is connected to the CPU 325, and visually displays that the incoming signal has been received according to the driving signal of the CPU 325, and uses an LED. For example, when the incoming signal is received, the incoming signal display unit 365 blinks the LED for a period corresponding to the ring signal, indicating that the incoming signal has been received from the outside.

The display unit 370 is connected to the CPU 325 and serves to display the caller information and the telephone number input by the user through the CPU 325, and use an LCD. For example, the display unit 370 may initially be in a sleep mode (no light) and then switch to an active mode (lighted state) by a driving signal of the CPU 325.

The telephone function execution unit 375 is located between the CPU 325 and the PSTN network, and performs a general telephone call function. The basic function unit (eg, a ring detector, DTMF transmitter, etc.) necessary to perform an incoming / outgoing call function is performed. ). The telephone function performing unit 375 is well known because it is implemented in a general telephone, and thus will not be described in detail.

In addition, the present invention further includes an incoming signal detecting unit 375 to detect an electromagnetic wave power (that is, a radio frequency signal) of the frequency band used of the mobile terminal 200 without passing through the CPU 325 to reach the incoming signal. Can detect whether or not. The incoming signal detector 375 may be configured to detect a radio frequency signal through an antenna for receiving a radio frequency and a matching coil, and transmit the fact to the incoming signal display unit 365.

Hereinafter, the operation relationship of the multifunction charger of the mobile terminal according to the present invention will be described in more detail with reference to the accompanying drawings.

Figure 4 is a flow chart illustrating the operation of the charging and using the mobile terminal keypad of the multi-function charger according to the present invention, connecting the connector and earphone jack of the multi-function charger to the communication port and the earphone jack insertion port of the mobile terminal, respectively, Assume that you have plugged the telephone plug into the telephone wall jack and the AC / DC adapter of the multifunction charger into an AC power outlet.

At the same time that the communication port of the mobile terminal and the connector of the multifunction charger are connected, the charging and communication interface unit supplies the charging power applied from the charging circuit unit to the mobile terminal battery through the charging terminal of the connector and displays the current charging state (S410). . For example, the LED is displayed in red while charging, and green when charging is completed. In addition, when the connection between the communication port of the mobile terminal and the connector of the multifunction charger is not properly made may be implemented to blink red.

Next, the CPU checks the operation of the call button, speaker phone button, or hook on / off switch unit of the key input unit to determine whether the multi-function charger is in the off state (S420), and if not in the off state, proceeds to step S405. The charging operation is continued, and when the hook is off, the receiver receives the DTMF signal applied through the earphone jack (S430) and simultaneously stores the received DTMF signal in the memory unit and displays the DTMF signal on the LCD so that the user can check the DTMF signal. (S440). To request a phone call using the keypad of a mobile device, the user operates one of a call button, a speakerphone button, or a hook on / off switch part of a key input unit to switch the multifunction charger to a hook-off state, and then turn on the keypad of the mobile terminal. Enter the phone number to call. The telephone number (ie, DTMF signal) input by the user is converted into an electrical signal through the earphone jack and applied to the DTMF receiver of the multifunction charger, and the CPU controls to store and display the DTMF signal applied through the DTMF receiver.

Next, the CPU cuts off the connection between the mobile terminal and the multifunction charger connected through the earphone jack by applying the relay driving signal to the relay driving unit, and attempts to connect the call through the telephone function performing unit and the PSTN network (S450). If it is determined that the connection is made (S460) and the connection is not established, the CPU proceeds to step S410 to continue the charging operation, and when the connection is made, the voice signal is exchanged through the PSTN network (S470).

In addition, the CPU determines whether the user inputs the volume button during the voice signal exchange (S480), and when the volume button is input, the CPU controls the volume of the voice signal to be output (S490). If the CPU does not input the volume button in step S480 or the multi-function charger is in the hook-on state after step S490 (S495), if the call is not in the hook-on state, the call is in progress. After repeating the steps and repeating the steps, if the hook is on, the call is terminated, so returning to the initial step and continuing the battery charging operation.

5 is a flowchart illustrating the operation relationship between the multifunction charger and the mobile terminal during the charging and reception of the multifunction charger according to the present invention. The connector and the earphone jack of the multifunction charger are inserted into the communication port and the earphone jack insertion port of the mobile terminal. It is assumed that each connection is made, the telephone plug of the multifunctional charger is connected to a telephone outlet, and the AC / DC adapter of the multifunctional charger is connected to an AC power supply outlet.

At the same time that the communication port of the mobile terminal and the connector of the multifunction charger are connected, the charging and communication interface unit supplies the charging power applied from the charging circuit unit to the mobile terminal battery through the charging terminal of the connector and displays the current charging state (S510). . For example, the LED is displayed in red while charging, and green when charging is completed. In addition, when the connection between the communication port of the mobile terminal and the connector of the multifunction charger is not properly made may be implemented to blink red.

Next, the CPU determines whether an incoming signal is detected from the charging and communication interface unit (S520). If the incoming signal is not detected, the CPU proceeds to step S510 to continue the battery charging operation. By driving the signal display unit to visually indicate that the incoming signal has reached, and simultaneously displays the caller information applied from the mobile terminal through the charging and communication interface unit, and stores the information in the memory unit (S530). Here, the reason for storing the sender information in the memory unit is to inform the user of the received caller information when the user is away. For example, when there are three missed calls, the LCD displays "three missed calls" to support the user to check received call information later. Of course, the missed call information can be confirmed even in the mobile terminal itself. When the incoming signal arrives from the outside, the mobile terminal applies the fact to the charging and communication interface through the ring detection terminal of the communication port, and the received caller information is applied to the charging and communication interface through the data transmission / reception terminal.

Next, the CPU determines whether the call button or the speakerphone button is input (S540), and if the input of the corresponding button is not detected, the process proceeds to the step S530 to continuously display the caller information, and when the input of the corresponding button is detected. Exchange the voice signal with the mobile terminal through the earphone jack (S550). To exchange voice signals with the mobile terminal through the earphone jack, the CPU applies the input of the call button or the speakerphone button to the voice signal interface unit, and the voice signal interface unit grounds the microphone terminal for a predetermined time so that the multifunction charger receives the voice signal. Notifies the mobile terminal that it is in a state capable of transmitting and receiving. Therefore, the mobile terminal transmits and receives a voice signal through the earphone jack. The voice signal interface unit switches the voice signal through the first speaker and the microphone when the call button is input according to the type of the input button, and switches the voice signal through the second speaker and the microphone when the speakerphone button is input. At this time, the CPU controls the relay driver to be connected to the mobile terminal and the multi-function charger.

Next, the CPU determines whether the user inputs the volume button during the voice signal exchange (S560), and when the volume button is input, the CPU controls the volume of the voice signal to be output (S570). If the CPU does not enter the volume button in the step (S560) or the multi-function charger is in the hook-on state after the step (S570) (S580), if the call is not in the hook-on state, the step (S550) After repeating the steps and repeating the steps, if the hook is on, the call is terminated, so returning to the initial step and continuing the battery charging operation.

In another embodiment of the present invention, the voice signal between the mobile terminal and the multi-function charger may be implemented to be exchanged through a communication cable. When the voice signal is to be exchanged with the mobile terminal through the communication cable, the CPU receives digital voice data input from the data transmitting / receiving terminal of the mobile terminal communication port through the charging and communication interface unit and transmits the digital voice data to the voice codec and the amplifying unit. In addition, the CPU transfers the input button information (ie, information on whether a call button or speakerphone button). Therefore, the voice codec and amplifying unit converts the digital voice data applied from the CPU into an analog signal and outputs it to the designated speaker, and converts the voice signal input from the designated microphone into a digital signal and transmits the digital signal to the CPU. The voice codec and amplifying unit switches the designated speaker and the microphone according to the input button information applied from the CPU. As described above, the first speaker and the microphone are built into the handset of the multifunction charger, and the second speaker and the microphone are built into the multifunction charger body. That is, the second speaker and the microphone are for performing a speakerphone function.

In addition, since the multifunction charger of the present invention is provided with a telephone function performing unit, it is of course possible to perform an incoming / outgoing call function by implementing a keypad.

The above descriptions are merely illustrative of one embodiment, and the present invention is not limited to the above-described embodiments, and various modifications can be made within the appended utility model registration claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention may be modified.

As described above, according to the multi-function charger of the mobile terminal according to the present invention, a call function, a caller information display function, an incoming call signal display function, a volume control speakerphone function, etc. are added to the battery charger of the mobile terminal. Thus, there is an effect that can use a variety of services during charging.

Claims (6)

In the mobile terminal charger including a power supply unit, a charging circuit unit to supply the charging power to the operating power and the battery of the mobile terminal, including a handset, A key input unit for generating a key signal for indicating a specific operation; A DTMF receiver connected to the mobile terminal through an earphone jack and receiving a DTMF signal applied through a keypad of the mobile terminal and transmitting the DTMF signal to the CPU; It is connected to the key input unit, receives various key signals applied from the key input unit to perform an operation corresponding to the key signal, receives a DTMF signal applied through the DTMF receiving unit and makes a call through a PSTN network, A CPU configured to collectively control each component to perform data transmission / reception with the mobile terminal and perform an incoming / outgoing call function with the PSTN network; And Located between the CPU and the PSTN network, a multifunction charger of a mobile terminal, characterized in that it comprises a telephone function performing unit for performing a general telephone call function. In the mobile terminal charger including a power supply unit, a charging circuit unit to supply the charging power to the operating power and the battery of the mobile terminal, including a handset, A key input unit for generating a key signal for indicating a specific operation; It is connected to the key input unit, receives various key signals applied from the key input unit, performs an operation corresponding to the key signal, receives a DTMF signal applied through the keypad of the mobile terminal, and makes a call through the PSTN network. A CPU configured to collectively control each component to perform data transmission / reception with the mobile terminal and perform an incoming / outgoing call function with the PSTN network; A charging and communication interface unit located between the mobile terminal and the CPU and connected to the charging circuit unit, and configured to adjust a data format, an operation speed, and an operation timing to exchange various data between the mobile terminal and the CPU; A voice signal interface unit which switches to exchange voice signals with the mobile terminal through a designated path; A relay driver connected to the mobile terminal, the CPU, and the voice signal interface unit, and configured to switch to apply or block a voice signal applied from the mobile terminal to the voice signal interface unit by a relay driving signal of the CPU; A DTMF receiver connected to the mobile terminal through an earphone jack and receiving a DTMF signal applied through a keypad of the mobile terminal and transmitting the DTMF signal to the CPU; A transmission signal amplifier connected to the voice signal interface unit and amplifying a voice signal applied from the voice signal interface unit and outputting the amplified voice signal to a first speaker; A received signal amplifier for amplifying the voice signal captured by the first microphone and transmitting the amplified voice signal to the voice signal interface unit; It is connected to the CPU and the voice signal interface unit, and amplifies the voice signal applied from the voice signal interface unit to a predetermined size and outputs it to the second speaker, and amplifies the voice signal captured through the second microphone to the voice The digital voice data is transmitted to a signal interface unit, and the digital voice data applied from the CPU is converted into an analog voice signal and output to the second speaker. A voice codec and amplification unit to be transferred to the; A memory unit connected to the CPU and storing caller information applied through the CPU and storing a telephone number input through the key input unit; A display unit connected to the CPU and configured to display caller information and a telephone number input by the user; And Located between the CPU and the PSTN network, a multifunction charger of a mobile terminal, characterized in that it comprises a telephone function performing unit for performing a general telephone call function. The method according to claim 1 or 2, A charge state display unit connected to the CPU and configured to externally display a charge state of the battery of the mobile terminal; And And a ringing signal display unit connected to the CPU and visually displaying that the ringing signal is received according to the driving signal of the CPU. The method according to claim 1 or 2, A hook on / off switch unit for generating a hook on / off signal according to whether the handset is settled or not and waiting for transmission / reception; The apparatus further includes an incoming signal detecting unit configured to detect an incoming signal through an antenna for receiving a radio frequency and a matching coil. Multifunctional charger of the mobile terminal, characterized in that for applying the incoming signal detected by the incoming signal detection unit to the incoming signal display. The method of claim 1, wherein the key input unit A call button for indicating that the call is in a transceivable state; A speakerphone button instructing to perform a speakerphone function; And Multifunctional charger of a mobile terminal, characterized in that it comprises a volume button for adjusting the size of the input / output voice signal. The method of claim 2, The charging and communication interface unit and the mobile terminal communicate with the serial communication standard, and is connected to the communication port of the mobile terminal through a communication cable including a connector, The voice signal interface unit and the mobile terminal are connected to the earphone jack insertion port of the mobile terminal through the earphone jack, exchange the DTMF signal and the voice signal through the earphone jack, The communication port of the mobile terminal is a multi-function charger of the mobile terminal, characterized in that it comprises a charging terminal, a data transmission and reception terminal, a connection detecting terminal, a ring detection terminal.