KR100865279B1 - Mobile Communication Terminals Being able to display to additional Display Device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal that can be displayed on an external display device, which enables data display of a terminal on an external display such as a TV.

According to the present invention, a mobile communication terminal comprising a key input unit, a wireless transmission / reception unit, a handset unit, an LCD driver, an LCD unit, a demodulation unit, a memory unit, and a control unit, wherein the mobile communication terminal includes the control unit and an external display. And a display signal converting unit connected between devices to convert a display signal to a standard display method of the external display device, and further comprising a mode discriminating unit for determining whether the mobile communication terminal is in an LCD display mode or an external display mode. It is characterized by being provided. As a result of the above configuration, the user can view data such as an image and a game through a large display such as a TV, thereby increasing the convenience of use.

Mobile terminal, display standard method

Description

Mobile Communication Terminals Being able to display to additional Display Device}

1 is a perspective view of a mobile communication terminal according to the prior art.

2 is a circuit block diagram of a mobile communication terminal according to the prior art.

3 is a mobile communication terminal and a USB cable coupled thereto according to the present invention.

4 is a circuit block diagram of a mobile communication terminal according to the present invention.

5 is a detailed block diagram of a display signal conversion unit according to the present invention;

6 is a flow chart of an operation process displayed on the external display device according to the present invention.

            * Description of the symbols for the main parts of the drawings *

10,36; Cell Phone 14: Cable

18: extended LCD 22, 42: wireless transceiver

24,44: handset 26,46: key input

28,48; LCD Driver 30,50: LCD

32: extended LCD drive unit 34: extended LCD unit

37: mobile phone port 38: control unit

39: memory unit 40: variation demodulation unit                 

52: display signal converter 53: GPU

54: Video RAM 55: D / A Converter

60: USB cable 62: USB port

64: Jack

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal having a display signal conversion unit for displaying content such as weather, stock information, and movie on an external display device.

In general, there are cellular telephones (Celluar Telephone), PCS phones (Personal Communications Services), IMT-2000 (International Mobile Telecommunications-2000), etc. (hereinafter referred to as mobile phones) ).

The mobile communication terminal has a function of receiving a voice call as well as a traditional function, transmitting and receiving text data, and recently, receiving various information such as photos and movies by connecting to the Internet from the Internet.

Especially in the case of a mobile communication terminal having various information retrieval such as securities and weather or photograph, video, game, and global positioning system (GPS) service function, the display, which is the screen on which the above service is output, is appropriately sized. You must have enough to enjoy the above secretary.

However, the display of the currently used mobile communication terminal is relatively larger than the size of the mobile communication terminal, but is too small for the user.

As a conventional technique for solving the size problem of the mobile communication terminal display as described above, there is, for example, a 'mobile phone having an extended display (published number 2001-0077141)'.

Hereinafter, a brief description will be given of a conventional mobile phone having an extended display. 1 and 2 are diagrams of a mobile phone having a conventional extended display. 1 is a perspective view of a mobile phone connected to a conventional extension display, and FIG. 2 is a circuit block diagram of a mobile phone having a conventional extension display.

As shown in FIG. 2, a mobile phone 10 having an extended display of the related art is connected to an extended liquid crystal display (LCD) 18 through a cable 14.

On the other hand, the components constituting the appearance of the mobile phone 10, for example, a keypad, a handset, a display unit, and the like are already known and are not related to the technical gist of the present invention, detailed description thereof will be omitted.

Looking at the configuration of the circuit of the mobile phone according to the prior art, first, the wireless transceiver 22 is connected to the mobile phone circuit 21. The wireless transceiver 22 receives or transmits a frequency corresponding to a use frequency (radio frequency) range of the cellular phone 10 through an antenna.

In addition, the mobile phone circuit unit 21 includes a modulation / demodulation unit (not shown), a controller (not shown), and a memory unit (not shown). The modulator / demodulator (not shown) demodulates an analog signal (voice) received through the wireless transceiver 22 into a digital signal (a codec (Coder / Decoder) performs a function), and the wireless transmitter / receiver The modulated data signal received through (22) is modulated by the frequency shifting keying method.

A control unit (not shown) is connected to the modulation / demodulation unit (not shown). The control unit (control unit) stores the data signal demodulated by the modulation and demodulation unit in the memory unit.

The control unit is connected to the key input unit 26 and the handset unit 24, respectively. The key input unit 26 inputs a letter or number input by a user using a key button to the controller. The handset unit 24 is a device in which a user inputs a call voice or receives a demodulated call voice.

The LCD driver 28 is connected to the controller, and the extended LCD driver 32 is connected by a cable 14. The LCD driver 28 receives the driving control of the controller (not shown), drives the LCD unit 30, and transmits a data signal to the LCD unit 30. In addition, the extended LCD driver 32 receives the driving control of the controller (not shown), drives the extended LCD 34, and transmits a data signal to the extended LCD 34.

Next, an operation process of the mobile phone according to the prior art having the above configuration will be described.

When a data signal (for example, stock information) is received through the wireless transceiver 30, the data is demodulated by the modulation / demodulation unit (not shown), and the demodulated data is controlled by the control unit (not shown). By the memory unit (not shown).

The data stored in the memory unit (not shown) is called by the controller (not shown) and sent to the LCD driver 28 or the extended LCD driver 32.

As described above, the data sent to the LCD driver 28 or the extended LCD driver 32 is sent to the LCD unit 30 or the extended LCD unit 34 and displayed.

However, a mobile phone having an extended display according to the prior art having the above configuration and operation process poses the following problems.

That is, as seen above, a mobile phone having an extension display according to the prior art should be provided with a separate extension LCD 18.

The following problem occurs due to the additional LCD 18 as described above. First, by purchasing the extended LCD 18 separately, the economic cost burden increases. In addition, since the extended LCD 18 must be carried at all times, inconvenience in use is increased.

In addition, when the display of the extended LCD 18 is small and there are many characters, it may not be easy to see. Furthermore, in the case of services such as GPS, securities, video, entertainment, etc. However, it is difficult for multiple people to use it at the same time.

The present invention has been made to solve the problems of the prior art as described above, has the following object.

First, in the case of a mobile communication terminal having various information retrieval such as securities and weather or photograph, video, game, and global positioning system (GPS) service function, an external display having sufficient display size for the above service The present invention provides a mobile communication terminal capable of displaying a screen on a device.

Another object of the present invention is to provide a display device connected to a mobile communication terminal using an existing display, such as a TV, a PC monitor, or a beam projector, to display a screen on an external display at no economic cost. It is to provide a mobile communication terminal that can be.

A mobile communication terminal that can be displayed on an external display device according to the present invention for achieving the above object comprises a key input unit, a wireless transmission and reception unit, a handset unit, an LCD driver, an LCD unit, a modulation and demodulation unit, a memory unit, a control unit. In the mobile communication terminal, the mobile communication terminal further comprises a display signal conversion unit connected between the control unit and the external display device to convert the display signal to the standard display method of the external display device, the control unit And a mode discrimination unit for discriminating whether the mobile communication terminal is in an LCD display mode or an external display mode.                     

According to the above configuration, since the display can be displayed on an external display device having a sufficient size, the user can enjoy the content on a sufficiently large screen, and at the same time, a number of people can enjoy the service.

A mobile communication terminal that can be displayed on an external display device according to the present invention includes a graphic processing unit (GPU) for converting the display signal conversion unit into a display signal of an external display device by receiving a control signal and a synchronization signal from the control unit; And a graphic storage device configured to store graphic data of the controller under the control of a graphic processing device.

According to the above configuration, there is an advantage that the data can be processed smoothly even in the case of large data such as a moving picture.

The mobile communication terminal displayable on the external display device according to the present invention may further include a digital / analog converter when the external display device is an analog display method.

According to the above configuration, the digital display signal can be converted into an analog display signal.

The mobile communication terminal displayable on the external display device according to the present invention is characterized in that the connection between the display signal converter and the external display device is made through a terminal connection part formed on one side of the mobile communication terminal.

According to the above configuration, there is an advantage that the display signal converter and the external display device can be connected more smoothly.                     

A mobile communication terminal that can be displayed on an external display device according to the present invention is characterized in that the terminal connection portion is formed such that a port to be connected coincides with a universal serial bus (UBS) port.

According to the above configuration, the data transmitted from the mobile communication terminal to the external display device can be more smoothly and quickly transmitted.

Next will be described in detail with reference to the accompanying drawings an embodiment of a mobile communication terminal that can be displayed on the external display device of the present invention. Incidentally, the same content as described in the related art will be omitted.

Figure 3 is a mobile communication terminal according to the present invention and a USB (Universal Serial Bus, Universal Serial Bus) cable connected to the mobile communication terminal, Figure 4 is a circuit block diagram of a mobile communication terminal according to the present invention. 5 is a detailed block diagram of a display signal converter according to the present invention.

As shown in Fig. 4, reference numeral 42 denotes a radio transmitter and receiver. The wireless transmitter / receiver 42 is in the range of operating frequency {radio frequency (radio frequency) of the cellular phone 10, 824-849 MHz for cellular phones, 1850-1990 MHz for PCS phones, 2 GHz for IMT2000}. Receive or transmit the corresponding frequency through the antenna.

The modulator 40 is connected to the radio transmitter / receiver 42. The demodulator 40 extracts a modulated wave from a carrier, which is a high frequency carrier having low frequency information (audio and video data, etc.) and demodulates the original signal. The handset 44 is connected to the modulation / demodulation unit 40. The handset 44 transmits or receives a call voice of a user.

The control unit 38 is connected to the modulation and demodulation unit 40, and the memory unit 39 is connected to the control unit 38. The control unit 38 stores the signal modulated by the modulation and demodulation unit 40 in the memory unit 39, and the memory unit 39 stores the signal under the control of the control unit 38. The controller 38 includes a mode discrimination unit (not shown) for discriminating whether the LCD display mode or the external display mode will be described below.

The control unit 38 is connected to the key input unit 46. The key input unit 46 sends the character or number input by the user through the key button to the control unit 38.

In addition, the controller 38 is connected to the LCD driver 48, and the LCD driver 48 is connected to the LCD unit 50. The LCD driver 48 is driven by drive control of the controller 38 and drives the LCD unit 50. The LCD unit 50 displays the data loaded from the memory unit 39 by the control unit 38.

Also, a display signal converter 52 is connected to the controller 38. The display signal converter 52 converts the display signal into a standard display method allowed for an external display device connected through the USB cable 60 described below.

In addition, the external display device (for example, TV) and the mobile phone 36 are connected to a USB (Universal Serial Bus) by a USB cable 60.

One end of the USB cable 60 is provided with a USB port 62, and the other end is provided with a jack 64. The USB cable 62 is connected to the cellular phone port 37 so that the USB cable 60 and the cellular phone 36 are connected. The mobile phone port 37 is formed below the mobile phone 36. The jack 64 is connected to a terminal (not shown) formed in an external display device (not shown).

Next, a detailed configuration of the display signal converter 52 will be described with reference to FIG. 5. The display signal converter 52 may include a graphic processing unit (GPU) 52, a video RAM 53, and a digital / analog converter (D / A converter) ( 55).

The GPU 52 is connected to the control unit 38 and receives a control signal and a synchronization signal from the control unit 38 and converts the control signal into a display signal of an external display device.

Video RAM 53 is connected to the GPU 52. The video RAM 53 receives and stores graphic data of the controller 38 under the control of the GPU 53 as a storage device.

A D / A converter 55 is connected to the video RAM 54 and the GPU 52. The D / A converter 55 converts the digital display signal converted by the GPU 53 into an analog display signal that can be recognized by an external display device. Of course, the D / A converter 55 may not be necessary when the external display device is a digital display method.

Next, an operation process of a mobile communication terminal that can be displayed on an external display device having the above configuration will be described in detail with reference to FIG. 6.

6 is a flowchart illustrating an operation process displayed on the external display device according to the present invention.

First, data (eg, stock information, video, etc.) transmitted from the server is received by the wireless transmitter / receiver 42 and then demodulated by the modulation / demodulation unit 40 and then input to the controller 38.

The controller 38 stores the received data in the memory 39 (operation 510).

As described above, the data stored in the memory unit 39 is loaded by the control unit 38 to be displayed.

First, the user selects a display mode by deciding where to display data (the process displayed on the LCD unit 50 included in the mobile phone 36 is called an LCD display mode). The process of being displayed will be referred to as 'external display mode'.

  For example, when the user wants to view data through the LCD unit 50 of the mobile phone 36, the LCD display mode is selected. When the user wants to view data through the external display device, the external display mode is selected. Of course, the mode selection button is provided in the button portion (not shown) of the mobile phone 36 (step 512).

When the user selects a desired display mode by pressing a button of a button unit (not shown) in operation 512, a mode discriminating unit (not shown) in the controller 38 determines which display mode the user selects. The controller 38 drives the display mode according to the display mode determined by the mode discrimination unit (not shown) (step 514).

As a result of the determination in step 514, when the user selects the LCD display mode, the controller 38 drives the LCD driver 48 to drive the LCD display mode.

That is, the controller 38 recognizes the user's selection of the LCD display mode and sends the driving command signal to the LCD driver 48 to drive the LCD driver 48 (operation 516).

Simultaneously with driving the LCD driver 48, the controller 38 reads data stored in the memory 39. The controller 38 transmits data read from the memory 39 to the LCD 50 through the LCD driver 48. The operation of the LCD unit 50 is performed by the LCD driver 48.

The data input to the LCD unit 50 is displayed on the screen and used by the user (step 518).

On the other hand, when data is difficult to use through the LCD unit 50 of the mobile phone 36, or when a plurality of people want to view at the same time, the user selects the 'external display mode'.

As a result of the determination in step 514, when the user selects the 'external display mode', the controller 38 transmits data to the display signal converter 52 to convert the display signal.

That is, the display device has its own display standard scheme for each device. For example, LCDs have LCD-specific display standards, TVs have their own standard display formats (e.g., Phase Alternation Line (PAL), National Television Standards Committee (NTSC) standards, etc.), and PC monitors Each monitor has its own display method. Therefore, data can be displayed only by signals of the standard display system of each display device.

Accordingly, the display signal conversion unit 52 which receives data from the control unit 38 connects the LCD display signal already stored in the control unit 38 to the external display device connected by the USB cable 60. Convert to standard display signal.

The display signal converter 52 converts the display signal in more detail. First, the standard display signal of the external display device is connected by the USB cable 60 so that the controller 38 recognizes the moment when the user selects the 'external display mode' (step 520).

The controller 38 recognizing the standard display signal of the external display device as described above sends a standard display control signal and a synchronization signal to the GPU (53).

As described above, the GPU 53 receiving the control signal and the synchronization signal from the controller 38 converts the external signal into the external display signal recognized by the controller 38, and converts the processed data into the D / A converter 55. Send with                     

Meanwhile, the controller 38 sends a control signal and a synchronization signal to the GPU 53 and simultaneously sends data to the video RAM 54. As described above, the video RAM 54 that receives data from the controller 38 stores the data and is addressed by the GPU 53.

The data stored in the video RAM 54 is sent to the D / A converter 55 under the control of the GPU 53.

As described above, the data of the digital signal received from the video RAM 54 and the GPU 53 is converted into an analog signal by the D / A converter 55.

If the external display device adopts the digital display method, the digital / analog signal conversion process is not necessary, and the data processed by the GPU 53 will be immediately sent to the external display device (step 522).

Data converted by the display signal in operation 522 is transmitted along the USB cable 60 and displayed on an external display device (operation 524).

The above embodiments of the present invention are merely one embodiment of the technical idea of the present invention, and of course, other modifications can be made within the technical idea of the present invention by those skilled in the art.

A mobile communication terminal that can be displayed on an external display device according to the present invention having the above configuration and operation is expected to have the following effects.

First, by installing the display signal converter between the control unit (CPU) and the external display of the mobile communication terminal, it is expected that the data can be viewed through the large display device.

The above effects can be said to be even greater in the case of a mobile communication terminal having a function of information retrieval or photography, video, game, and satellite positioning system (GPS) service.

Second, as data can be viewed through a large display device, multiple people can use the data at the same time.

Third, by using an existing TV or the like without purchasing an external display device, an effect of not having to pay a separate economic cost is also expected.

Claims (5)

In the mobile communication terminal comprising a key input unit, wireless transmission and reception unit, handset, LCD driver, LCD, modulation and demodulation unit, memory unit, control unit, The mobile communication terminal further includes a display signal conversion unit connected between the control unit and an external display device to convert a display signal to a standard display method of the external display device. The display signal converter, A graphic processing device which receives the control signal and the synchronization signal of the controller and converts the signal into a display signal of an external display device; A graphic storage device for storing graphic data of the control unit under control of the graphic processing device; The control unit further includes a mode discrimination unit for determining whether the mobile communication terminal LCD display mode or an external display mode. delete The mobile communication terminal of claim 1, wherein the display signal converter further comprises a digital / analog converter when the external display device is an analog display method. The mobile communication terminal of claim 1, wherein the display signal converter and the external display device are connected to each other through a terminal connection part formed on one side of the mobile communication terminal. [5] The mobile communication terminal of claim 4, wherein the terminal connection part is formed so that the port to be connected matches the universal serial bus (UBS) port.

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