KR200321565Y1 - Mobile Fixed Phone Having Internal/External Keyboard - Google Patents

Abstract

The present invention relates to a fixed mobile terminal equipped with an internal and external keyboard.

The present invention is a stationary mobile terminal that can be equipped with an external keyboard as well as performing a telephone call through a mobile phone function in conjunction with a mobile communication network, the antenna for transmitting and receiving a wireless signal with the mobile communication network; An LCD display unit which displays an overall operating state of the fixed mobile terminal and displays characters according to data transmitted and received through the mobile communication network and key button input signals input from the external keyboard; A key input unit including a character button for inputting numbers such as telephone numbers, Korean, English and / or special characters, and a menu selection button for selecting a menu or inputting a command; A power line connection port for connecting a power line to supply power to the fixed mobile terminal; A microprocessor that generally controls the mobile phone function and / or additional functions; An external keyboard connection port connecting the external keyboard capable of inputting the key button input signal and the fixed mobile terminal; And an external keyboard processing unit configured to receive a key button signal from the external keyboard and transmit the key button signal to the microprocessor, wherein the external keyboard connection port is mounted. And a mode state storage unit configured to store a state of whether the input means of the fixed mobile terminal is the key input unit or the external keyboard as a state flag. .

Description

Mobile Fixed Phone Having Internal / External Keyboard}

The present invention relates to a fixed mobile terminal equipped with an internal and external keyboard. More specifically, an internal and external keyboard is mounted or connected to a fixed mobile terminal that performs a phone call function and an additional function through a mobile phone function using a mobile communication network and a wired phone function using a wired telephone network, and inputs text using the same. The present invention relates to a fixed mobile terminal equipped with an internal / external keyboard connection port so that additional functions such as games and games can be performed more conveniently.

In homes and offices, a general telephone or a key-phone telephone using a public switched telephone network (PSTN) is mainly used. In the case of such a general telephone or a telephone telephone, the landline is fixed and the position is fixed. Therefore, the receiver can move the call while the telephone receiver is within the allowable length while receiving the call.

1A and 1B are views showing the appearance of a general telephone 100 and a conventional mobile communication terminal 110 used in a conventional general telephone communication system.

The power line connection port 102 and the telephone line connection port 104 exist on the back or bottom of the general telephone 100 used in the conventional general telephone communication system.

The conventional general telephone 100 configured as described above performs only a simple call operation of making a telephone call from a transmitting telephone and performing a telephone call in response to a receiving telephone. That is, the conventional general telephone 100 does not have a function such as multimedia communication other than a simple telephone call, so there is little room for expanding additional functions.

On the other hand, recently, the mobile communication terminal 110 performs a phone call with the counterpart while overcoming the limitation of movement. In the case of the mobile communication terminal 110, a technology for downloading or transmitting a desired image data and audio data to a counterpart, a technology for downloading a game and driving the mobile communication terminal 110 in accordance with the multimedia era It is becoming universal. Accordingly, mobile communication terminals are used in various ways regardless of adolescents, office workers, and adults who want multimedia services.

However, since most mobile communication terminals 110 emphasize portability, the emphasis is on miniaturization and light weight, so that the key buttons of the mobile communication terminal 110 are menu buttons such as basic number buttons, moving cursors, call buttons, and end buttons. It consists only of. Such a button configuration has a problem that it is difficult to effectively use additional services that are currently popularized, for example, additional services such as text message transmission, fax transmission, Internet access, and games.

In addition, there are various methods of inputting text such as letters, numbers, special symbols, and the like on a mobile communication terminal such as a PDA (not shown). One method is for a user to write in a handwriting recognition area on a touch screen. This input method is convenient because it can be input as a person writes, but there is a problem that the recognition speed is slow and the letters are often recognized incorrectly. The other method is to input a desired letter, number or symbol by pressing a keyboard provided on the touch screen panel of the PDA with a pen. This input method has the advantage of being able to input correct letters, numbers, or special symbols, but it has a limitation in typing quickly, and it is inconvenient for older people because the area allocated to each letter is not large. There is a problem that there is.

In addition, since the LCD screen of the mobile communication terminal 110 is small, it is inconvenient that it is not suitable to use the above-described additional services such as text message transmission, reception, fax transmission, Internet access, and games.

As such, users who are accustomed to multimedia communication are required to have additional functions associated with multimedia communication in addition to phone calls such as telephones that are encountered in homes or offices. In addition, there is a demand for a terminal including a convenient key button to effectively perform such a function.

In order to solve the above problems, the present invention is to install or connect an external keyboard to a fixed mobile terminal performing a phone call function and an additional function through a mobile phone function using a mobile communication network and a landline phone function using a wired telephone network, It is an object of the present invention to provide a stationary mobile terminal that can be used to more conveniently perform additional functions such as text input or games.

It is also an object of the present invention to provide a fixed mobile terminal equipped with a built-in keyboard which enables a user to perform additional functions such as character input or a game more conveniently by embedding a keyboard having the same arrangement as a computer keyboard in the fixed mobile terminal. It is done.

1A and 1B are views showing the appearance of a general telephone and a conventional mobile communication terminal used in a conventional general telephone communication system;

Figure 2 is a view from above of the external shape of a fixed mobile terminal which can be equipped with an external keyboard according to a preferred embodiment of the present invention,

3A and 3B are views showing external appearances seen from the rear and side of a fixing mobile terminal which can be equipped with an external keyboard according to a first embodiment of the present invention;

4A and 4B are views showing external appearances seen from the rear and the side of a fixing mobile terminal which can be equipped with an external keyboard according to a second embodiment of the present invention;

Figure 5 is a block diagram schematically showing the internal configuration of a fixed mobile terminal that can be equipped with an external keyboard according to a preferred embodiment of the present invention,

Figure 6 is a view from above of a fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention,

7A and 7B are views showing the external appearance of the fixed mobile terminal equipped with a built-in keyboard according to a preferred embodiment of the present invention, viewed from the back and the side;

8 is a block diagram schematically showing the internal configuration of a fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention,

9 is a block diagram showing in detail the internal configuration of the built-in keyboard and the built-in keyboard processing unit according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: regular telephone

102, 302, 402, 702: power line connection port

104, 310, 408, 718: telephone line connection port

110: mobile communication terminal 202: antenna

204: camera 206: speaker

208: handset 210: LCD display

212, 604: key input 214: earphone jack

216: microphone 304, 404, 704: printer connection port

306, 410, 706: external keyboard connection port

308, 406, 708: mouse connection ports 312, 416: external keyboard

314, 712: External FDD connection port 316, 716: Joystick connection port

318, 412: internal CD drive 320, 414: cable

502 and 802: Program memory 504 and 804: Data storage unit

506, 806: mode state storage unit 508, 808: camcorder processing unit

510, 810: subscriber information storage unit 512, 812: microprocessor

514, 814: DSP 516, 816: baseband converter

518, 818: RF signal processing unit 520, 820: input and output processing unit

522, 822: wired telephone unit 524: external keyboard processing unit

526: wired and wireless mode state storage unit 714: computer connection port

902: key button 904: key matrix circuit

906: built-in keyboard control unit 908: FSK modulator

910, 918: band pass filter 912: buffer amplifier

914, 922: interface unit 916: preamplifier

920: FSK demodulator 924: keyboard processing control

In order to achieve the above object, the present invention provides a fixed mobile terminal that can be equipped with an external keyboard, in addition to performing a phone call through a mobile phone function in conjunction with a mobile communication network, for transmitting and receiving wireless signals with the mobile communication network. antenna; An LCD display unit which displays an overall operating state of the fixed mobile terminal and displays characters according to data transmitted and received through the mobile communication network and key button input signals input from the external keyboard; A key input unit including a character button for inputting numbers such as telephone numbers, Korean, English and / or special characters, and a menu selection button for selecting a menu or inputting a command; A power line connection port for connecting a power line to supply power to the fixed mobile terminal; A microprocessor that generally controls the mobile phone function and / or additional functions; An external keyboard connection port connecting the external keyboard capable of inputting the key button input signal and the fixed mobile terminal; An external keyboard processor configured to receive a key button signal from the external keyboard and transmit the key button signal to the microprocessor, wherein the external keyboard connection port is mounted; And a mode state storage unit for storing a state of whether the input means of the fixed mobile terminal is the key input unit or the external keyboard as a state flag. It is characterized by.

In addition, according to another object of the present invention, in addition to performing a telephone call through a mobile phone function in conjunction with a mobile communication network, a fixed mobile terminal equipped with a built-in keyboard, an antenna for transmitting and receiving a wireless signal with the mobile communication network; An LCD display unit which displays an overall operating state of the fixed mobile terminal and displays characters according to data transmitted and received through the mobile communication network and key button input signals input from the external keyboard; A key input unit including a character button for inputting numbers such as telephone numbers, Korean, English and / or special characters, and a menu selection button for selecting a menu or inputting a command; A power line connection port for connecting a power line to supply power to the fixed mobile terminal; A microprocessor that generally controls the mobile phone function and / or additional functions; A built-in keyboard for generating and transmitting a modulated signal obtained by modulating a key button input signal corresponding to a key button; And a built-in keyboard processing unit configured to receive the modulated signal from the built-in keyboard and generate a demodulated demodulated signal and transmit the demodulated signal to the microprocessor. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 is a view from above of the external shape of the fixed mobile terminal which can be mounted external keyboard according to a preferred embodiment of the present invention.

Fixed mobile terminal that can be equipped with an external keyboard according to an embodiment of the present invention is an antenna 202, a camera 204, a speaker 206, a handset 208, an LCD display 210, a key input unit 212 ), The earphone jack 214, the microphone 216 and the like.

The antenna 202 transmits and receives a wireless signal with a mobile communication network, the camera 204 photographs a subject, stores the image data, and the speaker 206 outputs an acoustic signal as an audible sound.

The handset 208 inputs or outputs a voice or audio signal for a telephone call, and the LCD display 210 displays the overall operating state of the fixed mobile terminal, including the degree of use of power, the reception strength of radio waves, and the date and time. It also displays and transmits and receives data through the mobile communication network.

The key input unit 212 includes a character button for inputting numbers such as telephone numbers, Korean, English, and / or special characters, and a menu selection button for selecting a menu or inputting a command. Earphone jack 214 is an interface for inserting the earphone jack, the microphone 216 receives the user's voice or sound and converts it into an electrical signal.

3A and 3B are views showing external appearances of a fixed mobile terminal capable of mounting an external keyboard according to a first embodiment of the present invention, seen from the rear and side surfaces thereof.

Fixed mobile terminal that can be equipped with an external keyboard according to a first embodiment of the present invention, when viewed from the rear, the power line connection port 302, printer connection port 304, external keyboard connection port 306 , A mouse connection port 308 and a telephone line connection port 310, and the like, and when viewed from the side, an external floppy disk drive connection port 314, a joystick connection port 316, and an internal CD drive 318. It has a configuration including.

The power line connection port 302 is a port for connecting a power line to supply power to the fixed mobile terminal.

The printer connection port 304 is a port for connecting a printer for outputting image data and the like as a hard copy.

The external keyboard connection port 306 is a port for connecting an external keyboard 312 and a fixed mobile terminal capable of inputting a key button input signal for data input. The external keyboard connection port is a connection port for connecting a keyboard for a desktop computer 312, a connection port for connecting a keyboard for a palmtop computer (not shown), and a connection for connecting a notebook (not shown). A port and a connection port that can connect a PDA (not shown) are possible.

In addition, the external keyboard connection port 306 may have a serial port, a parallel port, a USB port, an RF module for wireless communication, and an infrared communication device for infrared communication.

The fixed mobile terminal according to the first embodiment of the present invention is equipped with an external keyboard connection port 306 in the form of a serial port, and connects a keyboard 312 for a desktop computer using a wired cable 320. .

The mouse connection port 308 is a port for connecting a computer mouse (not shown) for data input.

The telephone line connection port 310 is an interface for a general wired telephone call, and by mounting the telephone line connection port 310 on a fixed mobile terminal, a mobile terminal and a wired telephone can be configured.

4A and 4B are views illustrating external appearances of a fixing mobile terminal which can be equipped with an external keyboard according to a second exemplary embodiment of the present invention, seen from the rear and side surfaces thereof.

Fixed mobile terminal that can be equipped with an external keyboard according to a second embodiment of the present invention, when viewed from the rear, the power line connection port 402, printer connection port 404, mouse connection port 406 and It has a configuration including a telephone line connection port 408 and the like, and when viewed from the side, it has a configuration including an external keyboard connection port 410 and an internal CD drive 412 and the like. Only portions that differ from the fixed mobile terminal that can be equipped with an external keyboard according to the first embodiment of the present invention will be described.

Fixed mobile terminal according to a second embodiment of the present invention is equipped with an external keyboard connection port 410 of the parallel port type of the above-described external keyboard connection port, using a wired cable 414 notebook computer Is connected to an external keyboard 416. By connecting the fixed mobile terminal and the notebook computer according to the second embodiment of the present invention, a key button input signal can be input to the fixed mobile terminal using the keyboard 416 of the notebook.

Fixed mobile terminal that can be mounted external disk drive according to a preferred embodiment of the present invention is a form including one or more of the type of power line connection port (302, 402) and external keyboard connection port (306, 410, etc.) In its basic form, the connection ports except for one or more of the power line connection ports 302 and 402 and the external keyboard connection ports 306 and 410 are optional components.

Figure 5 is a block diagram schematically showing the internal configuration of a fixed mobile terminal that can be equipped with an external keyboard according to an embodiment of the present invention.

The fixed mobile terminal which can be equipped with an external keyboard according to a preferred embodiment of the present invention includes a program memory 502, a data storage unit 504, a mode state storage unit 506, a camcorder processing unit 508, and a subscriber information storage unit. 510, microprocessor 512, digital signal processor (DSP) 514, baseband converter 516, RF signal processor 518, input / output processor 520, wired telephone 522, external keyboard processor ( 524, the wired / wireless mode state storage unit 526, and the like. Here, further description of the configuration described with reference to FIGS. 3 and 4 will be omitted.

The program memory 502 implements a function of performing a wireless telephone call through a mobile communication network, and stores communication protocol software for processing transmission / reception data according to a predetermined protocol.

The data storage unit 504 functions as a data buffer when the fixed mobile terminal is operated and stores audio data or video data. In addition, it stores the numeric data input from the key input unit 212, the external keyboard (312, 416) or data received from the outside to the fixed mobile terminal.

The mode state storage unit 506 stores the operation mode of the fixed mobile terminal selected by the key input unit 212 and the external keyboards 312 and 416 as state flags.

In particular, the input mode state of the operation mode of the fixed mobile terminal may be automatically determined depending on whether the cables 320 and 414 are connected to the external keyboard connection ports 306 and 410, or the key input unit 212 or the external type. It may also be determined by manually selecting a mode by input of the keyboards 312 and 416.

The camcorder processing unit 508 operates the camera 204, and converts the image data input through the camera 204 into video data and transmits it to the microprocessor 512.

Subscriber identity module (SIM) 510 stores subscriber terminal registration information. Here, the subscriber station registration information is a unique number assigned to each subscriber station in the mobile communication network, and the subscriber information storage unit 510 is inserted in the form of a card. Since this is a general content used in a mobile communication network, a description thereof will be omitted.

The microprocessor 512 controls the operation of the terminal with reference to the state flag stored in the mode state storage unit 506. That is, the microprocessor 512 generally controls the mobile phone function and / or additional functions of the fixed mobile terminal.

In particular, the microprocessor 512 provides a character code according to the key button signal generated by the key input unit 212 and the external keyboards 312 and 416, and controls the fixed mobile terminal or processes data according to the character code. Function.

The DSP 514 performs an audio data processing function that encodes or decodes audio data SPEECH exchanged with the baseband converter 516, and equalizes to remove noise of a multipath. Digital signal processing processor that performs a function. In addition, the DSP 514 receives the received message data RX DATA from the baseband converter 516.

The baseband converter 516 converts signals transmitted and received with the speaker 206, the microphone 216, and the RF signal processor 518 into baseband signals, and functions such as digital-to-analog conversion and analog-digital conversion processing. Do this. Accordingly, the baseband converter 516 converts the audio data received from the DSP 514 into an audio signal and outputs the audio signal to the speaker 206 or to the RF signal processor 418 for transmission, and from the microphone 216. The input audio signal is converted into audio data and output to the DSP 514.

In addition, the baseband converter 516 converts the transmission message data TX DATA input from the microprocessor 512 into a transmission message signal TXIQ and outputs it to the RF signal processor 518 or the RF signal processor 518. The received message signal RXIQ, which is inputted from the RXQ, is converted into the received message data RX DATA and output to the DSP 514. The baseband converter 516 automatically controls a gain for the power POWER of the RF signal processor 518 (AGC).

The RF signal processing unit 518 converts a transmission message signal into a radio frequency (RF) signal and outputs it to the antenna 202, or converts an RF signal applied from the antenna 202 into a reception message signal RXIQ and converts it into baseband. Output to the unit 516. The antenna 202 transmits an RF signal to the air or transmits an RF signal received from the air to the RF signal processor 518.

The input / output processing unit 520 has a plurality of functional blocks for performing input / output of data, and as described above, a plurality of peripheral device connection ports and telephone line connection ports 418 for general telephone calls are connected.

The wired telephone unit 522 is provided for a general telephone call through the PSTN network, and includes a handset 208 for inputting and outputting voice or audio signals and corresponding to the number input by the key input unit 212 (DMFN). It also includes a DTMF generator (not shown) for generating a multi-frequency signal. When the fixed mobile terminal according to the preferred embodiment of the present invention is not used for a general telephone call, internal components related to the wired telephone unit 522 and the wired telephone unit 522, for example, a wired / wireless mode state storage unit 526 ) May be omitted.

The external keyboard processing unit 524 receives a key button signal from the external keyboards 312 and 316 and transmits the key button signal to the microprocessor 512. In addition, the external keyboard processing unit 524 is equipped with various types of external keyboard connection ports 306 and 410 as described above.

In particular, when the external keyboard processing unit 524 receives a key input signal from the external keyboards 312 and 316, the external keyboard processing unit 524 transmits the input signal to the microprocessor 512, and the microprocessor 512 transmits a character code corresponding to the input key button signal. Follow the function.

Figure 6 is a view from above of a fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention.

Fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention is an antenna 202 camera 204, speaker 206, handset 208, LCD display 210, earphone jack 214, microphone (Not shown), a built-in keyboard 602, a key input unit 604, and the like.

Since a fixed mobile terminal equipped with a built-in disk according to a preferred embodiment of the present invention and an external keyboard according to a preferred embodiment of the present invention have a common configuration, a description thereof will be omitted.

The built-in keyboard 602 is an input device that receives a key input signal corresponding to a key button and generates and transmits a modulated modulated signal. The embedded keyboard 602 according to a preferred embodiment of the present invention provides convenience for use by making the arrangement and configuration of the keys the same or similar to the arrangement and configuration of the desktop computer keyboard.

The key input unit 604 includes only a menu selection button for selecting a menu or inputting a command. Character buttons for entering numbers such as telephone numbers, Korean, English and / or special characters use the key buttons of the embedded keyboard 602.

In FIG. 6, the mounting form of the built-in keyboard 602 is just one example, and the size and shape of the built-in keyboard 602 may be variously changed in actual implementation of the fixed mobile terminal equipped with the built-in keyboard according to the present invention.

7A and 7B are views showing external appearances of the fixed mobile terminal equipped with a built-in keyboard according to a preferred embodiment of the present invention, viewed from the rear and the side.

Fixed mobile terminal equipped with a built-in keyboard according to a preferred embodiment of the present invention, when viewed from the rear as shown in Figure 7A, the power line connection port 702, printer connection port 704, keyboard connection port ( 706), a mouse connection port 708, and the like, and a CD drive connection port 710, a floppy disk drive connection port 712, and a computer connection port 714 as viewed from the side as shown in Fig. 7B. ) And joystick connection port 716. Since the parts described with reference to FIGS. 3 and 4 will not be further described.

However, the fixed mobile terminal equipped with a built-in keyboard according to a preferred embodiment of the present invention is a basic form including only the power line connection port 702, connection ports other than the power line connection port 702 is an optional configuration Element.

8 is a block diagram schematically showing the internal configuration of a fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention.

Fixed mobile terminal equipped with a built-in keyboard according to an embodiment of the present invention is a program memory 802, a data storage unit 804, a mode state storage unit 806, a camcorder processing unit 808, subscriber information storage unit ( 810, microprocessor 812, digital signal processor (DSP) 814, baseband converter 816, RF signal processor 818, input / output processor 820, wired telephone 822, built-in keyboard processor ( 824, a built-in keyboard 602, and the like. As described above, the fixed mobile terminal equipped with a built-in keyboard according to a preferred embodiment of the present invention is similar to the internal configuration of the fixed mobile terminal that can be equipped with an external keyboard according to a preferred embodiment of the present invention, Figure Only parts that differ from the configuration described in section 5 will be described.

The microprocessor 812 controls the operation of the terminal with reference to the state flag stored in the mode state storage unit 806. That is, the microprocessor 812 generally controls the mobile phone function and / or additional functions of the fixed mobile terminal.

In particular, the microprocessor 812 provides a character code according to a demodulation signal generated by the embedded keyboard 602 and the embedded keyboard processing unit 824, and controls a fixed mobile terminal or processes data according to the corresponding character code. Do it.

The embedded keyboard processing unit 824 receives a modulated signal modulated by the embedded keyboard 602, generates a demodulated signal, and transmits the demodulated signal to the microprocessor 812.

9 is a block diagram showing in detail the internal configuration of the built-in keyboard 602 and the built-in keyboard processing unit 824 according to an embodiment of the present invention.

As described above, the various types of built-in keyboard 602 include key buttons 902, key matrix circuit 904, built-in keyboard controller 906, FSK modulator 908, band pass filter 910, buffer amplifier 912. ) And the interface unit 914.

The key button 902 serves as an input interface of the built-in keyboard 602, and the key matrix circuit 904 generates a key button input signal in accordance with the operation of the key button 902.

The FSK modulator 908 generates a modulated signal from the key button input signal, the band pass filter 910 filters the required components of the modulated signal, and the buffer amplifier 912 receives the signal passed through the band pass filter 910. Amplify.

The interface unit 914 promotes a communication interface between the built-in keyboard 602 and the built-in keyboard processing unit 824, and the built-in keyboard controller 906 includes a key button 902, a key matrix circuit 904, and an FSK modulator ( 908, the band pass filter 910, the buffer amplifier 912, the functions of the interface unit 914 and the operation of the built-in keyboard 602 are generally controlled.

In the embedded keyboard 602 according to the preferred embodiment of the present invention, the key code generated by the key input is frequency modulated by the FSK modulator 908 so that only necessary components pass through the band pass filter 910 and the buffer amplifier 912. Supplied to the built-in keyboard processing unit 824.

The built-in keyboard processing unit 824 includes a preamplifier 916, a band pass filter 918, an FSK demodulator 920, an interface unit 922, a keyboard processing control unit 924, and the like.

The preamplifier amplifies the modulated signal received from the built-in keyboard 602, and the band pass filter 918 filters the necessary components of the amplified modulated signal.

The FSK demodulator 920 demodulates a modulated signal that has passed through the band pass filter 918 to generate a demodulated signal, and the interface unit 922 establishes a communication interface with the microprocessor 812.

The keyboard processing controller 924 generally controls the functions of the preamplifier 916, the band pass filter 918, the FSK demodulator 920 and the interface unit 922, and the operation of the embedded keyboard processing unit 824.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains will be capable of various modifications without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present specification are not intended to limit the present invention but to describe the present invention, and the spirit and scope of the present invention are not limited thereto. The scope of the present invention should be construed by the claims below, and all the technologies within the equivalent scope should be construed as being included in the scope of the present invention.

As described above, according to the present invention, an internal and external keyboard can be mounted on a fixed mobile terminal that performs a phone call function and an additional function through a mobile phone function using a mobile communication network and a wired phone function using a wired telephone network. In the conventional landline telephone or mobile communication terminal, there is an effect that the limitation of character input is eliminated. As a result, various additional functions, for example, various types of text messages, fax transmissions, Internet access and games, etc. can be conveniently provided on the mobile terminal.

Claims (18)

A fixed mobile terminal that can be equipped with an external keyboard as well as perform a phone call through a mobile phone function in conjunction with a mobile communication network, An antenna for transmitting and receiving a wireless signal with the mobile communication network; An LCD display unit which displays an overall operating state of the fixed mobile terminal and displays characters according to data transmitted and received through the mobile communication network and key button input signals input from the external keyboard; A key input unit including a character button for inputting numbers such as telephone numbers, Korean, English and / or special characters, and a menu selection button for selecting a menu or inputting a command; A power line connection port for connecting a power line to supply power to the fixed mobile terminal; A microprocessor that generally controls the mobile phone function and / or additional functions; An external keyboard connection port connecting the external keyboard capable of inputting the key button input signal and the fixed mobile terminal; An external keyboard processor configured to receive a key button signal from the external keyboard and transmit the key button signal to the microprocessor, wherein the external keyboard connection port is mounted; And Mode state storage unit for storing the state of whether the input means of the fixed mobile terminal is the key input unit or the external keyboard as a state flag Fixed mobile terminal that can be equipped with an external keyboard comprising a. The method of claim 1, A wired telephone unit connected to a wired telephone network to transmit and receive a wired signal and perform a telephone call; An input / output processing unit having a plurality of functional blocks for inputting / outputting data, and equipped with a telephone line connection port; And Wired and wireless mode state storage unit for storing the mode state of the mobile phone mode or wired telephone mode of the fixed mobile terminal as a status flag Fixed mobile terminal that can be equipped with an external keyboard, characterized in that it further comprises. The method of claim 1, The external keyboard connection port is a connection port for connecting a keyboard for a desktop computer, a connection port for connecting a keyboard for a palmtop computer, a connection port for connecting a laptop, and a connection for a PDA. Fixed mobile terminal that can be equipped with an external keyboard, characterized in that it comprises one or more of the ports. The method of claim 1, The external keyboard connection port may include an external keyboard including at least one of a serial port, a parallel port, a USB port, an RF module for wireless communication, and an infrared communication device for infrared communication. Mountable mobile terminal. The method of claim 2, A fixed mobile terminal that can be equipped with an external keyboard, characterized in that the peripheral device connection port is additionally mounted to the input / output processing unit. The method of claim 5, The peripheral device connection port is a fixed mobile terminal that can be equipped with an external keyboard, characterized in that at least one of a printer connection port, a mouse connection port, a joystick connection port, a USB port and a computer connection port. The method of claim 1, And the microprocessor provides a character code according to the key button signal, and controls the fixed mobile terminal or processes data according to the character code. The method of claim 1, And the input mode state is automatically determined according to whether a cable is connected to the external keyboard connection port. The method of claim 1, And the input mode state is determined by manually selecting a mode by the key input unit or the external keyboard. The method of claim 2, The wired telephone unit is equipped with an external keyboard, characterized in that it includes a handset for the input and output of voice or sound signals and a DTMF generator for generating a dual tone multi-frequency (DTMF) signal corresponding to the number input by the key input unit Fixed mobile terminal. As a fixed mobile terminal equipped with a built-in keyboard while performing a phone call through a mobile phone function in conjunction with a mobile communication network, An antenna for transmitting and receiving a wireless signal with the mobile communication network; An LCD display unit which displays an overall operating state of the fixed mobile terminal and displays characters according to data transmitted and received through the mobile communication network and key button input signals input from the external keyboard; A key input unit including a character button for inputting numbers such as telephone numbers, Korean, English and / or special characters, and a menu selection button for selecting a menu or inputting a command; A power line connection port for connecting a power line to supply power to the fixed mobile terminal; A microprocessor that generally controls the mobile phone function and / or additional functions; A built-in keyboard for generating and transmitting a modulated signal obtained by modulating a key button input signal corresponding to a key button; And An embedded keyboard processor configured to receive the modulated signal from the embedded keyboard, generate a demodulated demodulated signal, and transmit the demodulated signal to the microprocessor; Fixed mobile terminal equipped with a built-in keyboard, characterized in that it comprises a. The method of claim 11, A wired telephone unit connected to a wired telephone network to transmit and receive a wired signal and perform a telephone call; An input / output processing unit having a plurality of functional blocks for inputting / outputting data, and equipped with a telephone line connection port; And A mode state storage unit for storing a mode state of a mobile phone mode or a wired phone mode of the fixed mobile terminal as a state flag; Fixed mobile terminal equipped with a built-in keyboard, characterized in that it further comprises. The method of claim 11, The built-in keyboard, A key button for planning an input interface of the embedded keyboard; A key matrix circuit for generating the key button input signal in accordance with the operation of the key button; An FSK modulator for generating a modulated signal from the key button input signal; An interface unit for establishing a communication interface with the built-in keyboard processing unit; And Built-in keyboard control unit for controlling the function of the key button, the key matrix circuit, the FSK modulator, the interface unit and the operation of the embedded keyboard as a whole Fixed mobile terminal equipped with a built-in keyboard, characterized in that it comprises a. The method of claim 11, The built-in keyboard processing unit, An FSK demodulator for demodulating the modulated signal to generate a demodulated signal; An interface unit for establishing a communication interface with the microprocessor; And A keyboard processing control unit controlling overall functions of the FSK demodulator, the interface unit, and operations of the embedded keyboard processing unit; Fixed mobile terminal equipped with a built-in keyboard, characterized in that it comprises a. The method of claim 12, A fixed mobile terminal equipped with a built-in keyboard, characterized in that the input and output processing unit is additionally equipped with a peripheral connection port. The method of claim 15, The peripheral connection port may include at least one of a CD drive connection port, a floppy disk drive connection port, a printer connection port, a mouse connection port, a joystick connection port, a USB port, and a computer connection port. Mobile terminal for. The method of claim 11, The microprocessor provides a character code according to the demodulation signal, and controls the fixed mobile terminal or processes data according to the character code. The method of claim 12, The wired telephone unit is equipped with a built-in keyboard, characterized in that it includes a handset for input and output of voice or sound signals and a DTMF generator for generating a DTMF (Dual Tone Multi-Frequency) signal corresponding to the number input by the key input unit Stationary mobile terminal.