KR100504140B1 - Apparatus and method for output selecting of connector/antenna in mobile phone - Google Patents

Abstract

The present invention relates to a mobile communication terminal for receiving and reproducing a television signal, the apparatus for reproducing a video signal received from a mobile communication terminal, comprising: an IF connector for transmitting a signal received from an external input terminal into the mobile communication terminal; And an RF switching unit for switching between a signal received from the IF connector and a signal received from an antenna, selecting one of the signals and applying the signal to a TV tuner, and controlling overall operation of the mobile communication terminal. And a control unit for controlling the RF switching unit according to a received signal.

Description

Device and method for selecting and outputting video signal of connector / antenna in mobile communication terminal {APPARATUS AND METHOD FOR OUTPUT SELECTING OF CONNECTOR / ANTENNA IN MOBILE PHONE}

The present invention relates to a mobile communication terminal, and to an apparatus and method for receiving a video signal capable of receiving and reproducing a television signal.

Currently, the mobile communication terminal is being converted into a structure capable of transmitting high speed data in addition to the voice communication function. That is, when a mobile communication network of the International Mobile Telecommunication-2000 (IMT-2000) standard is implemented, high-speed data communication may be implemented in addition to voice communication using the mobile communication terminal. Data that can be processed by the mobile communication terminal performing data communication may be packet data and image data (eg, picture data, pixel data).

In addition, the portable terminal includes a display unit, and the size of the display unit is gradually increasing. In addition, portable terminals capable of displaying image data received from a base station together or processing data photographed from a camera have also emerged. The portable terminal may receive and display a television video signal. In this case, a television reception function should be added to the portable terminal. In addition, it should be possible to perform a communication function simultaneously or independently while processing the television signal.

Accordingly, a method for receiving and reproducing the television signal (that is, the television mode) while simultaneously making a voice call or performing data communication (that is, the call mode) has been proposed.

On the other hand, in the case of receiving and reproducing a television signal as described above, since the TV airwave signal is received only by its own antenna provided in the mobile communication terminal, there is a limitation that only a specific airwave channel can be viewed.

In addition, when the TV aerial signal is received by the antenna itself, the reception state may be poor according to the electric field situation, and thus there is a disadvantage in that astigmatism occurs.

Accordingly, an object of the present invention is to provide an apparatus and method for receiving an external video signal through a connector in a mobile communication terminal equipped with a reproduction function of a television signal.

Another object of the present invention is to provide an apparatus and method for receiving an external video signal by adding an external video signal input terminal to a charger connected through a connector in a mobile communication terminal equipped with a reproduction function of a television signal.

According to an aspect of the present invention, there is provided an apparatus for reproducing a video signal received in a mobile communication terminal, the apparatus comprising: an IF connector for transmitting a signal received from an external input terminal into the mobile communication terminal, and received from the IF connector; An RF switching unit which selects one of the signals and applies it to a TV tuner, controls the overall operation of the mobile communication terminal, and switches the RF according to a received signal. It is characterized by consisting of a control unit for controlling the unit.

The apparatus further includes a diplexer for separating the signal received from the antenna into a signal for a call mode and a signal for a television mode.

When the IF connector is connected to an external input terminal, the controller controls the RF switching unit to select a signal received from the IF connector.

The IF connector may be connected to any one selected from a CATV receiving terminal, a VIDEO output terminal, a vehicle antenna connection terminal, a TV antenna connection terminal, and a public hearing network connection terminal.

The IF connector is characterized in that it is used integrally with the connector for the charger.

In addition, the present invention for achieving the above object, in the method for reproducing the video signal received in the mobile communication terminal, the process of detecting whether the external video signal received from the IF connector of the mobile communication terminal, and the external And selectively receiving a video signal received from an antenna and a video signal received from the IF connector according to whether a video signal is received.

Meanwhile, when the IF connector is connected to an external input terminal in the process of detecting whether the external video signal is received, the RF switching unit controls to select a signal received from the IF connector. do.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible.

In the following description, specific details such as SPDT, SP3T, etc. are shown to provide a more general understanding of the invention. It will be apparent to those skilled in the art that the present invention may be readily practiced without these specific details and by modifications thereof.

Meanwhile, the term 'IF connector' used in the present invention generally refers to a receptacle terminal provided at a lower end of a mobile communication terminal and used for external signal input and power supply, and is generally composed of 22 pins. In addition, the "telephone" used in the present invention refers to a mobile communication terminal capable of receiving and reproducing a television video signal from an antenna.

First, the configuration of the television phone will be described with reference to FIG. 1 shows a schematic structure of a television phone as an example, and any modifications to other structures capable of performing the functions of the television mode and the call mode are possible in implementing the present invention.

Referring to FIG. 1, the signal received from the antenna 18 is divided into a television signal processor and a call (or data communication) signal processor, respectively, according to a television mode or a call mode.

The TV module 10 includes a TV tuner 12, an image signal processor 14, and an audio signal processor 16. The TV tuner 12 outputs a down converted video intermediate frequency (VIF) and an audio intermediate frequency (AIF) by mixing a tuning signal (SEL-F) and a received signal through the antenna 18. do. The video signal processor 14 connected to the output of the TV tuner 12 demodulates the video frequency signal VIF output from the TV tuner 12 and outputs a composite video signal Vcomp. The audio signal processing unit 16 processes the audio intermediate frequency signal AIF output from the TV tuner 12 to reproduce and output the audio signal of the TV broadcast program through the speaker SP.

The key input unit 22 includes a numeric key and various function keys. When the user presses a predetermined key, a key input signal is generated and applied to the controller 20.

When the control unit 20 is selected as the TV mode, the controller 20 supplies a power control signal PW to the TV module to enable the operation, and selects a channel selection signal input from the key input unit 22 or a channel selection signal CH previously selected. -S) to the TV tuner 12 in the TV module 10. The LCD driver 34 receives the R, G, B image signals output from the image signal processor 14 and the R, G, B image signals output from the OSD 24 to generate pseudo vertical synchronization signals and pseudo horizontal synchronization signals. Display on the screen.

The RF processor 24 receives the radio wave of the transmission / reception frequency band of the mobile phone from the antenna 18, converts the analog signal into a digital signal, converts the digital signal into an analog signal, and then wirelessly propagates through the antenna 18 after power amplification. The codec 28 performs demodulation, deinterleaving and decoding of the digital signal output from the RF processor 24, analysis of the forward channel data message received through signal processing and vocoding of data, and analog voice signal from the received data. It has the function of playing and its reverse function. For example, the reproduced analog audio signal is output to the speaker SP, and the analog audio signal input from the microphone MIC is converted into a CDMA digital signal and transmitted to the reverse channel through the RF processor 24. Has the function to

The OSD26 generates an OSD image signal corresponding to the character generation control data output from the controller 20 and provides the OSD image signal to the LCD driver 34. The MUX32 selects a call voice signal output from the codec 28 and a TV broadcast voice signal output from the voice signal processor 16 and outputs the sound to the ear speaker 40. The ear jack 38 selectively outputs a TV voice signal or a call voice signal to the earphone when the earphone is plugged in, and outputs a TV voice signal or a call voice signal to the ear speaker 40 when the earphone is not plugged in.

The memory 50 may be composed of program memory and data memories. The program memory may store programs for controlling a general operation of the TV phone, and the data memory temporarily stores data generated during the execution of the programs.

In the case of a general television phone as shown in FIG. 1, since a television video signal is received only through the antenna 18, a reception state may not be good in a wireless environment in which a channel environment is not good. Therefore, as shown in FIG. 2 according to the present invention, it is possible to receive an image signal through an external input terminal.

2 is a block diagram of a television phone for receiving an external video signal according to an embodiment of the present invention.

Referring to FIG. 2, the diplexer 110 separates a band signal received from the antenna 100. For example, a phone signal and a 50-700 MHz frequency are allocated for a call and data communication to which an 1851 to 1989 MHz frequency is allocated. It separates the TV signal and consists of a low pass filter and a high pass filter.

The signal received from the antenna 100 is applied to the diplexer 110 and separated. If the separated signal is a phone signal, the signal is applied to the phone duplexer 120 to perform a call function. Applies to 160 to display a TV video signal.

The RF switching unit 130 is a single-pole-double-row (SPDT) switching circuit composed of two input ports P1 and P2, one output port P3, and two control ports Vctrl1 and Vctrl2. to be. Meanwhile, the SPDT functions only as a switch according to a control signal and bidirectional communication is possible. Therefore, the SPDT can be implemented by switching one input signal to two terminals or outputting two input signals by selecting one terminal. have.

 In the RF switching unit 130, an output port P3 is connected to the TV tuner 160, and P1 of the input ports is connected to the IF connector 150 and P2 to the diplexer 110. The control ports are controlled under the control of the controller 170. When the 'High' signal is applied to Vctrl1 and the 'Low' signal is applied to Vctrl2, the output port P3 is connected to the IF connector 150.

In addition, when a 'High' signal is applied to Vtrlc2 among the control ports and a 'Low' signal is applied to the Vctrl1 control port, the output port P3 is switched to the diplexer 110.

The controller 170 performs a function of controlling the overall operation of the portable terminal. When the mobile communication terminal is set to an external input mode, the control unit 170 sets the control port Vctrl1 of the RF switching unit 130 to 'High' and the control port Vctrl2 to 'Low'. The RF switching unit 130 is controlled to switch to the IF connector 150. On the other hand, when the mobile communication terminal is set to its own antenna receiving mode, the control port Vctrl2 of the RF switching unit 130 is set to 'High' and the control port Vctrl1 is set to 'Low' so that the RF switching unit 130 is the diple Control to switch to Lexer 110.

Referring to FIG. 2, the operation of the portable terminal for tree mode will be described in more detail. The signal received through the antenna 100 is separated into a television signal and a call signal by the diplexer 110, and processed through the antenna 100. The received television received signal is selected through the RF switching unit 130.

On the other hand, the signal input through the external input terminal 140 is input to the RF switching unit 130 through the IF connector 150 provided to enable wired communication with the outside in the mobile communication terminal.

Accordingly, the RF switching unit 130 selects one of a television signal received through the diplexer 110 and an external input signal received through the IF connector 150 and outputs the signal to the TV tuner 160. That is, in general, when a television signal is to be received and viewed while moving, the television signal is received through the antenna 100, and an environment in which an image signal can be input by wire indoors (for example, an outdoor antenna connection terminal or a video input). Terminal), an external input signal may be connected by wire through the IF connector 150.

In this case, the reception method may be selected by a user's selection. Alternatively, when it is detected that a signal from an external input terminal is input, the reception method may be implemented in the external input mode.

In FIG. 2, the RF switching unit 130 is implemented as a SPDT for convenience. However, as described above, the RF switching unit 130 may be implemented by any other means equipped with a switch function capable of outputting one signal by selecting from two input signals. .

Hereinafter, the SPDT will be described with reference to FIG. 3.

FIG. 3 illustrates an RF switching unit 130 having a single-pole-double-throw (SPDT) type including two input ports, one output port, and two control ports Vctrl1 and Vctrl2 as described above.

Referring to FIG. 3, the SPDT is composed of 6 terminals, 4 and 6 are two input terminals, and 2 is an output terminal. In addition, terminal 5 is a ground terminal, and terminals 1 and 3 are control terminals.

If Vctrl1 is 'H' and Vctrl2 is 'L' among the control terminals, the 6th terminal and the 2nd terminal are connected to perform data transmission and reception between the IN1 and the OUT. In addition, when Vctrl1 is 'L' and Vctrl2 is 'H' among the control terminals, the fourth terminal and the second terminal are connected, and the connection between the IN2 and the OUT is performed.

Therefore, the signal input to IN1 or IN2 is selected by the control signals input to Vctrl1 and Vctrl2.

4 is a diagram illustrating a connection relationship of a television phone for receiving an external video signal according to an embodiment of the present invention.

First, referring to Figure 4a, in order to implement the present invention is configured in the form of a coaxial cable connection terminal 410 that can be connected to the external input terminal on one side, the terminal external connection that can be connected to the IF connector of the mobile communication terminal 430 on the other side A connection line configured in the form of a terminal 420 is required.

Currently, the IF connector connecting portion of the mobile communication terminal 430 is composed of 22 pins, and each pin is allocated for power supply, data input / output, ground, and the like. Meanwhile, some of the pins are left as spare pins (for example, pins 4 and 8), and the pins reserved for the application of the present invention may be utilized.

That is, the video signal received through the coaxial cable connection terminal 410 is connected to the mobile communication terminal through one of a plurality of pins (eg, 22 pins) of the terminal external connection terminal 420 forming the other end of the cable. Is entered.

The coaxial cable connection terminal 410 may generally be connected to a TV antenna connection terminal, a vehicle antenna connection terminal, a video output terminal, and a cable TV connection terminal 400. In addition, it may be connected to any other connection terminal not mentioned above, and the video signal flowing through the connected terminal may be displayed on the mobile communication terminal 430 by the same method as described above.

4B is a diagram illustrating a connection relationship between a television phone receiving an external video signal according to another embodiment of the present invention.

In general, the present invention can be more easily applied in an indoor environment equipped with an external signal input terminal, and thus can be configured in combination with a charger so that the mobile communication terminal 430 can be easily applied. Do.

Referring to FIG. 4B, it is possible to implement the present invention without having a separate connection line as shown in FIG. 4A.

That is, the connection unit 450 connectable to the external connection terminal 460 may be provided in a predetermined portion of the body 440 of the charger 440 capable of charging the terminal 430 through the terminal external connection terminal 450 connected to the IF connector of the mobile communication terminal 430. have. Therefore, when the connection unit 450 and the first external connection terminal 460 of the connection line are connected, and the second external connection terminal 410 and the external input terminal 400 on the other side of the connection line are connected, the image signal input from the external input terminal 400 is It may be transmitted to the terminal 430 via the charger.

In this case, since the charger supplies power through a specific pin of the terminal external connection terminal 450, in order to implement the present invention, the terminal external connection terminal 420 connected to one end of the charger may include a specific pin for the power supply. The external input signal is transmitted via another spare pin.

As a result, the charger 450 may be connected to an external connection terminal 460 to simultaneously charge the mobile communication terminal 430 and display an image signal.

Such an implementation can generally be utilized more effectively since the power supply outlet and the external antenna signal input terminal (or the public listening network connection terminal) are adjacent to each other in a room.

Meanwhile, as described above, the second external connection terminal may be connected to not only a TV antenna reception terminal but also a cable TV connection terminal, a video signal connection terminal, and a vehicle antenna connection terminal.

5 is a diagram illustrating a circuit connection of a television phone for receiving an external video signal according to the second embodiment of the present invention described above with reference to FIG. 4B.

Referring to FIG. 5, as shown in FIG. 4B, the present invention is integrated with a charger, so that a terminal can more effectively generate a control signal for selecting a received signal through its own antenna and a received signal through an external input signal. have.

As described above, the RF switch unit SPDT 520 selects the signal through its own antenna 500 and the external input signal through the IF connector 510 by the control signals Vctrl1 and Vctrl2. In addition, according to an embodiment of the present invention, the control signal may be controlled by the charging voltage.

That is, in FIG. 4B, when the charger is connected to an external power source and being charged, the control signal Vctrl1 becomes 'High' by the charging voltage 560 and the control signal Vctrl2 becomes 'Low'. Accordingly, the RF switching unit 520 selects the IF connector 510 and transmits an external input signal to the TV tuner 160 for display.

On the other hand, when the charger is not connected to an external power source, the mobile communication terminal is supplied with a voltage (for example, 2.8V) 540 by an internal battery, and the control signal Vctrl2 is 'high' by the battery voltage 540. The control signal Vctrl1 becomes 'Low'. Accordingly, the RF switching unit 520 selects a signal received from its own antenna 500 and transmits the selected signal to the TV tuner 160 for display.

Hereinafter, a procedure of receiving an external video signal in a television phone according to the present invention will be described with reference to FIG. 6.

Referring to FIG. 6, in step 610, the mobile communication terminal determines whether the current mode is a television reception mode. If not in the television reception mode, it is determined whether the call mode in step 670. If the mobile communication terminal is in the call mode in step 670, the call mode is performed in step 680. Meanwhile, the television reception mode and the call mode may be simultaneously performed. That is, data transmission or voice call is possible while displaying the television reception signal.

When the mobile communication terminal is in a television reception mode, it is determined whether an external input terminal is connected in step 620. The determination is a determination for controlling whether to receive an image signal from an external input signal, and as described above, the reception of an image signal from an external input terminal may be set by the user's selection without the determination.

If the external input terminal is not connected in step 620, it is determined that there is no signal input from the IF connector, and in step 630, the diplexer is selected through the RF switching unit. In doing so, in step 640, the television signal received through its antenna is reproduced.

In contrast, when the external input terminal is connected in step 620, the IF connector is selected through the RF switching unit in step 650, and the external image signal input through the IF connector is reproduced in step 660.

The selection method of the reception path of the RF switching unit may be implemented by other methods.

7 is a diagram illustrating a connection relationship between a television phone receiving an external video signal according to a third embodiment of the present invention.

Referring to FIG. 7, the above-described present invention can be implemented in a mobile communication terminal providing two modes, a PCS mode and a CDMA mode.

The first RF switching unit 710 separates the signal received from the antenna 700 into a signal for the PCS mode and a signal for the CDMA mode. The signal for the PCS mode is divided into a PCS phone signal and a television reception signal in the first diplexer 720, and the signal for the CDMA mode is divided into a CDMA phone signal and a television reception signal in the second diplexer 730. do.

The PCS phone signal among the signals output through the first diplexer is processed by the PCS duplexer 740, and the CDMA phone signal among the signals output through the second diplexer is processed by the CDMA duplexer 750.

Meanwhile, according to the present invention, the image signal received through the external input terminal 760 is input to the second RF switching unit through the IF connector 770.

The second RF switching unit selects from a television reception signal output from the first diplexer 720, a television reception signal output from the second diplexer 730, and a television reception signal output from the IF connector 770. To send.

The selection of the television reception signals is controlled by a control signal of the TV reception control unit 800 according to each mode.

In more detail, when the television reception signal is to be displayed through the PCS mode, the first RF switching unit Vc1 and the second RF switching unit Vc1 are input as 'High' and received through the antenna 700. The television received signal is transmitted to the TV tuner 790 via the first diplexer 720.

In the meantime, when the television reception signal is to be displayed through the CDMA mode, the television reception signal received through the antenna 700 is input by inputting Vc2 of the first RF switching unit and Vc2 of the second RF switching unit as 'High'. The second diplexer 730 is transmitted to the TV tuner 790.

Lastly, when the image signal input through the external input terminal 760 is to be displayed, Vc3 of the second RF switching unit is input as 'High' regardless of the control signal of the first RF switching unit, and the external input terminal is inputted. The video signal received through the 760 is transmitted to the TV tuner 790 via the IF connector 770.

FIG. 8 is a diagram illustrating a second RF switching unit of FIG. 7.

Referring to FIG. 8, the second RF switching unit 780 includes three input ports P4, P5, and P6, one output port P7, and three control ports Vc1, Vc2, and Vc3. It is a switching circuit of (Single-Pole -Three-Throw) type.

The SP3T is composed of a total of 12 terminals and is selected from signals input through terminals 8, 2, and 5 by the control signals of terminals 9, 6, and 1 and outputted to terminal 11. On the other hand, terminals 3, 4, 7, 10, and 12 are ground terminals.

In the third embodiment of FIG. 7 and FIG. 8, the mobile communication terminal providing the PCS mode and the CDMA mode is implemented. However, in addition to the two modes, two or more modes (eg, GSM mode, UMTS mode, etc.) are provided. The same applies to the mobile communication terminal.

For example, for a mobile communication terminal providing N modes, a single-pole (SPNT) for selecting one signal from among N television reception signals received through the N modes and a video signal received through the external input terminal, respectively. -N-Throw) switch can be implemented.

As described above, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, by receiving and reproducing the video signal through the external input terminal in the mobile communication terminal capable of reproducing the television signal, a better reception state can be maintained. In addition, by connecting to a cable TV terminal, a video output terminal, a TV antenna connection terminal and the like through the external input terminal, it is possible to receive a variety of services.

1 is a block diagram of a typical television phone.

2 is a block diagram of a television phone for receiving an external video signal according to an embodiment of the present invention.

3 is a diagram illustrating an RF switching unit of FIG. 1.

4A is a diagram showing a connection relationship of a television phone for receiving an external video signal according to the first embodiment of the present invention.

4B is a diagram illustrating a connection relationship of a television phone for receiving an external video signal according to a second embodiment of the present invention.

Fig. 5 shows a circuit connection of a television phone for receiving an external video signal according to the second embodiment of the present invention.

6 is a flowchart illustrating a procedure for receiving an external video signal in a television phone according to the present invention.

7 is a diagram showing a connection relationship between a television phone for receiving an external video signal according to a third embodiment of the present invention.

8 is a diagram illustrating an RF switching unit of FIG. 7.

Claims (9)

An IF connector for transmitting a video signal wired from an external input terminal to the mobile communication terminal; An antenna for wirelessly receiving a video signal through a wireless network; An RF switching unit which selects and transmits a specific video signal from a video signal received from the IF connector and the antenna to a TV tuner; A control unit for controlling each function unit of the mobile communication terminal and generating a control signal for selecting an image signal Apparatus for selectively outputting the video signal of the connector / antenna in a mobile communication terminal having a. The video signal of the connector / antenna in claim 1, further comprising a diplexer for separating the signal received from the antenna into a signal for a call mode and a signal for a television mode. Select the device to output. The terminal of claim 1, wherein the controller generates a control signal to select a video signal received from the IF connector when the IF connector is connected to an external input terminal. Device for selectively outputting video signal. . The connector / antenna of claim 1, wherein the IF connector is connected to any one selected from a CATV receiving terminal, a VIDEO output terminal, a vehicle antenna connection terminal, a TV antenna connection terminal, and a public listening network connection terminal. A device for selectively outputting the video signal of the. delete Detecting whether an external video signal is received from the IF connector of the mobile communication terminal; Selectively receiving a video signal received from an antenna and a video signal received from the IF connector according to whether the external video signal is received; Selecting and outputting the video signal of the connector / antenna in the mobile communication terminal including. The method of claim 6, wherein when the IF connector is connected to an external input terminal in the process of detecting whether the external image signal is received, the RF switching unit controls to select a signal received from the IF connector. A method for selectively outputting a video signal of a connector / antenna in a mobile communication terminal. The terminal of claim 6, wherein the IF connector is connected to any one selected from a CATV receiving terminal, a VIDEO output terminal, a vehicle antenna connection terminal, a TV antenna connection terminal, and a public listening network connection terminal. A method of selectively outputting a video signal. delete