KR100663124B1 - Method and Apparatus for link between personal digital assistant and mobile phone - Google Patents

Abstract

The present invention provides a method for outputting a display in a personal digital assistant coupled to a portable terminal, the method comprising: receiving a display conversion event of the personal digital assistant, converting the display screen of the personal digital assistant according to the conversion event; Transmitting the display signal before conversion to the portable terminal, receiving an input event corresponding to the display of the converted display screen, and transmitting the information processing result of the personal digital assistant corresponding to the input event to the display screen of the portable terminal. It includes a display output method comprising the step of.

PDA, Mobile Terminal, Keyboard Conversion

Description

Method and device for interworking between personal digital assistant and portable terminal {Method and Apparatus for link between personal digital assistant and mobile phone}             

1 is a block diagram of a method and apparatus for interworking between a personal digital assistant and a portable terminal according to an embodiment of the present invention.

2 is a flowchart illustrating a procedure of a method for interlocking a personal digital assistant and a portable terminal according to an exemplary embodiment of the present invention.

3 is a block diagram showing display conversion of a personal digital assistant according to an embodiment of the present invention.

4 is a flowchart illustrating a method of receiving a key input of a portable terminal from a PDA having a converted screen according to an exemplary embodiment of the present invention.

5 is an exemplary view showing a normal operation of the PDA according to an embodiment of the present invention.

Figure 6 is an exemplary view showing a selection display when applying the keyboard conversion button of the PDA according to an embodiment of the present invention.

Figure 7 is an exemplary view showing an example of the appearance of the keyboard displayed when selecting the keyboard layout selection icon for the word processor in the PDA according to an embodiment of the present invention.

8 is an exemplary view showing an embodiment of a game keyboard according to an embodiment of the present invention.

Figure 9 is an overall illustration of the case of using a PDA by connecting a portable terminal and the PDA according to an embodiment of the present invention.

10 is a flowchart illustrating a method of receiving a key input of a PDA from a portable terminal having a converted screen according to an exemplary embodiment of the present invention.

Figure 11 is another overall illustration of the case of using a PDA by connecting a portable terminal and the PDA according to an embodiment of the present invention.

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

101: portable terminal

103: terminal display panel

105: display panel

107: personal digital assistant

The present invention relates to a method and apparatus for interworking between a personal digital assistant and a portable terminal.

PDA (Personal Digital Assistant) is called as a personal digital assistant in Korea, and it is a small computer much smaller than a notebook and has a much stronger computing power than an electronic notebook. Since the overall size is small, the size of the display device is limited, and it is composed of a touch screen and is based on pen input which recognizes characters by writing with a pen. In addition, personal information management programs such as schedule management, address book, notepad, etc. are provided, and data can be exchanged freely through connection with a PC. In addition to the built-in programs, new programs can be installed and used. As Internet access through PDAs is becoming more active, PDAs are becoming the most popular devices in the wireless Internet field.

Meanwhile, the multimedia features of the recent PDA and Internet access. Communication functions have been developed that allow PDAs to be used as entertainment devices. It includes a program that can play video and audio formats. MP3 music files can be stored and moved on PDA and can be enjoyed as music videos. You can also play games such as PC games, watch TV and listen to the radio. And a recent PDA with a built-in digital camera can come out and take pictures and manage them easily.

In addition, you can use all the dictionaries such as English-Korean, Korean-English, English-English dictionary, and rooftop with one PDA. You can also take newspapers, daily English classes, and Internet lectures for middle and high school students. In addition to textbooks and reference books on PDA, you can also download problem book files from internet bookstores, and use them as translation programs that can translate Chinese, Japanese, and English. can do.

However, a PDA having a very diverse and powerful function as described above has a disadvantage in that it is inconvenient when a basic input device is a pen input using a touch pad and a word processor or a complicated operation program is driven.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above problems, and an object thereof is to provide a method and apparatus for interworking between a personal digital assistant and a portable terminal.

Another object of the present invention is to provide a method and apparatus for converting a display panel of a personal digital assistant into an input device, and instead of transmitting a display signal output from the personal digital assistant to the portable terminal for display on the portable terminal. There is a purpose.

It is another object of the present invention to provide a method and apparatus for receiving an input signal of a portable terminal from a personal digital assistant having a display panel converted.

Another object of the present invention is to provide a method and apparatus for receiving an input signal of a personal digital assistant from the keyboard of the portable terminal.

According to an aspect of the present invention, a method for outputting a display in a personal digital assistant coupled to a portable terminal, the method comprising: receiving a display conversion event of the personal digital assistant; Converting a display screen of the personal digital assistant into one of a text key input screen, a game controller screen, and a user-defined input device screen according to the display conversion event; Transmitting the display signal before the conversion to the portable terminal; Receiving an input event corresponding to the display of the converted display screen; And transmitting a result of the information processing of the personal digital assistant corresponding to the input event to the portable terminal.
Here, the transmission of the display signal to the portable terminal may be by a communication port included in the personal digital assistant and a wired, wireless communication device capable of coupling to the communication port.
In addition, the input event corresponding to the converted display screen display may be due to a touch screen coupled to the display screen.
According to another aspect of the present invention, a method for receiving a key event in a portable terminal coupled to a personal digital assistant, comprising: setting a key input method conversion event in the portable terminal; Combining with the personal digital assistant—wherein the personal digital assistant receives a display conversion event and displays a text key input screen, a game controller screen, and a user defined display screen of the personal digital assistant according to the display conversion event. Converted to any of the input device screens; And converting, from the combined personal digital assistant, the key input signal input corresponding to the display of the converted display screen of the personal digital assistant into the key input signal of the portable terminal. Can provide.
The signal input from the personal digital assistant may be a communication port included in the personal digital assistant and a wired or wireless communication device capable of coupling to the communication port.
The key input signal of the personal digital assistant may be generated by a touch screen coupled to the display screen of the personal digital assistant.
The portable terminal may further include disregarding an input signal generated by a key other than a predetermined key among key input devices included in the portable terminal after a key input method conversion event is set; And terminating the key input method conversion event when an input signal of the predetermined key is transmitted.
According to another aspect of the present invention, a method for receiving a key event in a personal digital assistant coupled to a portable terminal, the method comprising: setting a key input method conversion event in the personal digital assistant; Combining with the portable terminal, wherein the portable terminal receives an external output setting and is converted to output the keyboard signal of the portable terminal according to the event; And converting a key input signal inputted from the combined portable terminal into a key input signal of the personal digital assistant.
Here, the signal input from the portable terminal may be a communication port included in the portable terminal and a wired or wireless communication device capable of coupling to the communication port.
The personal digital information terminal may further include disregarding an input signal by a key other than a predetermined key among key input devices included in the personal digital information terminal after a key input method conversion event is set; And terminating the key input method conversion event when an input signal of the predetermined key is transmitted.
According to another aspect of the present invention, a personal digital assistant for outputting a display in combination with a portable terminal, comprising: means for receiving a display conversion event of the personal digital assistant; Means for converting the display screen of the personal digital assistant into one of a text key input screen, a game controller screen, and a user defined input device screen according to the display conversion event; Means for transmitting the display signal before the conversion to the portable terminal; Means for receiving an input event corresponding to the display of the converted display screen; And means for transmitting an information processing result of the personal digital assistant corresponding to the input event to the portable terminal.
Here, the transmission of the display signal to the portable terminal may be by a communication port included in the personal digital assistant and a wired, wireless communication device capable of coupling to the communication port.
In addition, the input event corresponding to the converted display screen display may be due to a touch screen coupled to the display screen.
According to another aspect of the present invention, a portable terminal that receives a key event in combination with a personal digital assistant, comprising: means for setting a key input method conversion event in the portable terminal; Means for combining with the personal digital assistant—wherein the personal digital assistant receives a display conversion event and displays a text key input screen, a game controller screen, and a user defined display screen of the personal digital assistant according to the display conversion event. Converted to any of the input device screens; And means for converting, from the combined personal digital assistant, the key input signal input corresponding to the display of the converted display screen of the personal digital assistant into the key input signal of the portable terminal. Can be.
Here, the signal input from the personal digital assistant may be a communication port included in the personal digital assistant and a wired or wireless communication device capable of coupling to the communication port.
Also,
The key input signal of the personal digital assistant may be generated by a touch screen coupled to the display screen of the personal digital assistant.
Means for ignoring an input signal by a key other than a predetermined key among key input devices included in the portable terminal after a key input method conversion event is set; And means for ending the key input method conversion event when an input signal of the predetermined key is transmitted.
According to still another aspect of the present invention, there is provided a personal digital assistant configured to receive a key event in combination with a portable terminal, comprising: means for setting a key input method conversion event in the personal portable terminal; Means for combining with the portable terminal, wherein the portable terminal receives an external output setting and is converted to output the keyboard signal of the portable terminal according to the event; And means for converting a key input signal input from the combined portable terminal into a key input signal of the personal digital assistant.
Here, the signal input from the portable terminal may be a communication port included in the portable terminal and a wired or wireless communication device capable of coupling to the communication port.
The personal digital assistant may further include means for ignoring an input signal by a key other than a predetermined key among key input devices included in the personal digital assistant after the key input method conversion event is set; And means for ending the key input method conversion event when an input signal of the predetermined key is transmitted.

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Next, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a method and apparatus for interworking between a personal digital assistant and a portable terminal according to an embodiment of the present invention.

Referring to FIG. 1, the personal digital assistant (PDA) 107 expresses a key input device using all of the display panel 105, and displays the display panel 103 of the portable terminal 101. The PDA 107 receives a signal to be calculated and displayed and outputs the screen of the PDA 107.

Here, the portable terminal 101 may be any computing device that is portable and includes a graphic display panel 103 such as a mobile communication terminal, a portable Internet terminal, a WCDMA terminal, and the like, and even the PDA 107. It could be another PDA other than).

The graphic display panel 103 may generally be an LCD display panel capable of expressing more than 256 colors, but any display device capable of exhibiting display characteristics expressed in the original display panel 105 in the PDA 107 is possible. Do. That is, if the display signal transmitted from the PDA from the PDA 107 and the portable terminal 101 can be appropriately modified and expressed on the display panel 103 of the portable terminal, what is the graphic display panel 103? It is okay.

The personal digital assistant (PDA) 107 may be a PDA, which is a commonly used name, and is a portable information terminal having a graphic display device, a touch pad screen, a program drive processor, and a communication device. Can be.

The PDA display panel 105 should be able to recognize the touch input information corresponding to the display of the display panel 105 using a touch pad function as well as a display function. The touch pad function may be a function of detecting contact information of the display panel 105 using an electrical, physical, and optical method.

2 is a flowchart illustrating a procedure of a method for interlocking a personal digital assistant and a portable terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 2, first, a keyboard converting function is set in the PDA (step 201). The PDA screen is then changed to the keyboard (step 203). When the display is converted, the PDA converts the screen signal transmitted to the display unit of the PDA to the communication unit to transmit the screen output signal (step 205). When the display screen of the PDA is touched in the above state, the touch pad converts the signal into a screen keyboard signal corresponding to the keyboard displayed on the display panel and transmits the signal to the communication unit (step 207).

Meanwhile, the portable terminal sets an external screen input signal (step 209). The event by the input device, such as a keyboard directly connected to the portable terminal, is then suspended (button keys are locked) (step 211). Thereafter, the screen output signal transmitted in step 205 is received through a communication port connected to the portable terminal (step 213). The signal is then converted appropriately to the portable terminal and the screen output of the PDA is then displayed on the display of the portable terminal in accordance with the signal (step 217). In addition, the portable terminal receiving the screen keyboard input signal according to the reference step 207 also presents a display according to the keyboard signal on its own display (step 217).

3 is a block diagram illustrating display conversion of a personal digital assistant according to an embodiment of the present invention.

Referring to FIG. 3, when the PDA converts the display panel to a keyboard, the PDA may select one of the three settings 301 of the keyboard converter.

That is, when the keyboard conversion event is input from the PDA, the PDA may select one of a word processor keyboard 303, a game keyboard 305, and other input-only keyboard 307. The word processor keyboard 303 is a model of a keyboard for editing a document for using a document editing program in a model of a keyboard of a general computer device. An example of the word processor keyboard will be described in detail with reference to FIG. 7.

The gaming keyboard 305 is a keyboard used when playing a game on a PDA. An example of the game-only keyboard will be described in detail with reference to FIG. 8.

The other input dedicated keyboard 307 is a user-defined keyboard 313 used when a special function other than the document editing function 309 or the game function 311 is desired to be used exclusively. The user defined keyboard may be included in a program by a program maker and provided according to a program.

4 is a flowchart illustrating a method of receiving a key input of a portable terminal from a PDA having a converted screen according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the portable terminal sets an external screen input signal (step 401). The event by the input device, such as a keyboard directly connected to the portable terminal, is then suspended (button keys are locked) (step 403). Thereafter, the keyboard preparation signal by the external input signal is transmitted to the PDA (step 405). Thereafter, upon receiving the keyboard signal from the PDA, the signal is appropriately changed to operate and output the processor according to the signal input from the PDA (step 407).

Meanwhile, the keyboard converting function is set in the PDA (step 409). The PDA screen is then changed to keyboard (step 411). Thereafter, upon receiving a keyboard preparation signal by an external input signal from the portable terminal (step 413), the PDA touches the display screen of the PDA to transmit a screen keyboard signal corresponding to the keyboard displayed on the display panel to the portable terminal. (Step 415).

5 is an exemplary view showing a normal operation of the PDA according to an embodiment of the present invention.

Referring to FIG. 5, the PDA 501 is generally operated in a form of selecting a menu displayed on the screen 503 using a touch screen. Therefore, on the PDA, the button keys are minimally attached, and most of the programs are displayed in the display screen 503 and displayed in a window form. However, in the PDA, the keyboard conversion button 505 according to the present invention may exist as an icon in the display screen 503, but may exist as an external button. The keyboard conversion button 505 is a button for performing a command for converting the entire display screen into a keyboard. Since an icon other than the keyboard may be difficult to be displayed on the converted display screen, the keyboard conversion button 505 may be applied as an external button instead of an icon inside the screen. .

6 is an exemplary view showing a selection display when the keyboard conversion button of the PDA according to an embodiment of the present invention is applied.

Referring to FIG. 6, when an event is executed by pressing the keyboard conversion button 505, the PDA may display a menu setting for selecting the type of keyboard displayed on the display.

The menu setting may include a keyboard layout selection icon 601 for a word processor, a keyboard layout selection icon 603 for a game, and another keyboard layout selection icon 605 for a keyboard. Selecting each icon causes the appropriate keyboard layout corresponding to the icon to be displayed on the entire PDA screen. Detailed shapes of the keyboard displayed when each icon is selected will be described in detail with reference to the accompanying drawings.

7 is an exemplary view showing an example of the appearance of the keyboard displayed when selecting the keyboard layout selection icon for the word processor in the PDA according to an embodiment of the present invention.

Referring to FIG. 7, the keyboard 701 is basically similar to the shape of a general QWERT keyboard, but has one key for displaying all information necessary for a word processor on a display of a PDA having a relatively small size compared to a general desktop keyboard. The information displayed on may vary.

In the method of using the keyboard, a letter largely displayed in a lower portion of the keyboard is generally displayed when the keyboard is touched once. If there are two marks on the bottom, the one displayed on the left is displayed by touching once and the one on the right is displayed by touching twice. The small display at the top of the button is displayed by pressing the Shift key and pressing the button. If several marks are written together at the top, they are displayed in the order of pressing the buttons from the left.

The above keyboard notation is merely an example and is not meant to be limited to the keyboard as described above. Therefore, many embodiments may be included in addition to the above embodiments.

8 is an exemplary view showing an embodiment of a gaming keyboard according to an embodiment of the present invention.

Referring to FIG. 8, it can be seen that the content 803 of the display screen displayed on the display screen 801 is like a game controller. The appearance of the game controller 803 may be optimized according to a game to be enjoyed and may be selected according to a user's taste. The game controller may be included in a game provided by a game company. The game controller 803 representing the graphic as described above allows the user to enjoy a more realistic game by interacting with the touch pad.

The display method of the game controller 803 is only one embodiment and is not meant to be limited to the above-described game controller. Therefore, many embodiments may be included in addition to the above embodiments.

9 is a diagram illustrating an overall case of using a PDA by connecting a portable terminal and a PDA according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the portable terminal 901 needs to set up a key input signal to be combined with the PDA. Here, the external keyboard 903 of the menu is a menu which can be selected when the input of the portable terminal is received from the PDA in conjunction with the PDA converted as the keyboard according to another embodiment of the present invention. On the other hand, the external input menu 905 is a selection menu for displaying the display signal received from the PDA according to the embodiment of the present invention on the display of the portable terminal.

The portable terminal 901 having selected the setting and the PDA having selected the keyboard conversion key may be physically coupled (907). Here, the physical coupling may be combined using a cable as shown by reference numeral 907, but may be wirelessly coupled according to circumstances, and the device may be directly coupled using a socket.

When combined as described above, the screen of the PDA may appear on the display of the portable terminal (909). In the case of reference numeral 909, the screen of the PDA is displayed on the mobile terminal. However, according to the menu selection of the mobile terminal, input of the mobile terminal may be received from the PDA.

10 is a flowchart illustrating a method of receiving a key input of a PDA from a portable terminal having a converted screen according to an exemplary embodiment of the present invention.

First, the PDA sets up an external input of the keyboard (step 1001). The input by the touch pad is then stopped (step 1003), and an input request signal is transmitted to the portable terminal (step 1005). The input signal is then transmitted from the portable terminal connected to the PDA, and the PDA is operated in accordance with the signal (step 1007).

On the other hand, the portable terminal sets the external output of the keyboard to be combined with the PDA according to the method of the present invention (step 1011). The function of the terminal may then be suspended (step 1013). Thereafter, a signal input from the keyboard of the portable terminal is prepared to be transmitted to the outside (step 1015). After receiving an input request signal from the PDA (step 1017), an event is input from the keyboard of the portable terminal and the signal is transmitted to the PDA (step 1019).

FIG. 11 is yet another exemplary diagram of a case of using a PDA by connecting a portable terminal and a PDA according to an embodiment of the present invention.

Referring to FIG. 11, the portable terminal 1101 needs to set a switch of a key input signal to be combined with the PDA. The external output mode indication displayed on the display of the portable terminal 1101 indicates that the portable terminal is operating as an external input device of the PDA 1103 without having a unique function.

The portable terminal 1101 and the PDA in which the external output mode is set may be physically coupled. Here, the physical coupling may be combined using a cable, but may be wirelessly coupled according to a situation, and a device may be directly coupled using a socket.

The combined portable terminal and the PDA as a result drive the PDA through the keyboard input of the portable terminal, so that users who are familiar with the keypad of the portable terminal can input faster and more precisely than in the case of complicated input such as text in the PDA. This is possible.

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

According to the present invention, it is possible to provide a method and apparatus for interworking between a personal digital assistant and a portable terminal.

In addition, according to the present invention, it is possible to provide a method and apparatus for converting a display panel of a personal digital assistant to an input device, and instead of transmitting a display signal output from the personal digital assistant to the portable terminal for display on the portable terminal. .

In addition, according to the present invention, it is possible to provide a method and apparatus for receiving an input signal of a portable terminal from a personal digital assistant having a display panel converted.

In addition, the present invention can provide a method and apparatus for receiving an input signal of a personal digital assistant from the keyboard of the portable terminal.

Claims (24)

A method of outputting a display in a personal digital assistant combined with a portable terminal, Receiving a display conversion event of the personal digital assistant; Converting a display screen of the personal digital assistant into one of a text key input screen, a game controller screen, and a user-defined input device screen according to the display conversion event; Transmitting the display signal before the conversion to the portable terminal; Receiving an input event corresponding to the display of the converted display screen; And Transmitting an information processing result of the personal digital assistant corresponding to the input event to the portable terminal; Display output method comprising a. delete The method of claim 1, The display signal is transmitted to the portable terminal by a communication port included in the personal digital assistant and a wired or wireless communication device which can be coupled to the communication port. Display output method characterized in that. The method of claim 1 The input event corresponding to the converted display screen display is by a touch screen coupled to the display screen. Display output method characterized in that. In the method for receiving a key event in a portable terminal combined with a personal digital assistant, Setting a key input method conversion event in the portable terminal; Combining with the personal digital assistant—wherein the personal digital assistant receives a display conversion event and displays a text key input screen, a game controller screen, and a user defined display screen of the personal digital assistant according to the display conversion event. Converted to any of the input device screens; And Converting, from the combined personal digital assistant, a key input signal input corresponding to the display of the converted display screen of the personal digital assistant to a key input signal of the portable terminal; Key event input method comprising a. delete The method of claim 5, The signal input from the personal digital assistant is by a communication port included in the personal digital assistant and a wired or wireless communication device that can be coupled to the communication port. Key event input method characterized in that. The method of claim 5 The key input signal of the personal digital assistant is generated by a touch screen coupled to the display screen of the personal digital assistant. Key event input method characterized in that. The method of claim 5 The portable terminal ignoring an input signal by a key other than a predetermined key among key input devices included in the portable terminal after a key input method conversion event is set; And Terminating the key input method conversion event when an input signal of the predetermined key is transmitted; Key event input method further comprises. A method for receiving a key event in a personal digital assistant coupled to a portable terminal, Setting a key input method conversion event in the personal digital assistant; Combining with the portable terminal, wherein the portable terminal receives an external output setting and is converted to output the keyboard signal of the portable terminal according to the event; And Converting a key input signal input from the combined portable terminal into a key input signal of the personal digital assistant Key event input method comprising a. The method of claim 10, The signal input from the portable terminal is a communication port included in the portable terminal and a wired or wireless communication device capable of coupling to the communication port. Key event input method characterized in that. The method of claim 10 Ignoring an input signal by a key other than a predetermined key among key input devices included in the personal digital assistant after the key input method conversion event is set; And Terminating the key input method conversion event when an input signal of the predetermined key is transmitted; Key event input method further comprises. A personal digital assistant for outputting a display in combination with a portable terminal, Means for receiving a display conversion event of the personal digital assistant; Means for converting the display screen of the personal digital assistant into one of a text key input screen, a game controller screen, and a user defined input device screen according to the display conversion event; Means for transmitting the display signal before the conversion to the portable terminal; Means for receiving an input event corresponding to the display of the converted display screen; And Means for transmitting an information processing result of the personal digital assistant corresponding to the input event to the portable terminal Personal digital assistant comprising a. delete The method of claim 13, The display signal is transmitted to the portable terminal by a communication port included in the personal digital assistant and a wired or wireless communication device which can be coupled to the communication port. Personal digital assistant, characterized in that. The method of claim 13, The input event corresponding to the converted display screen display is by a touch screen coupled to the display screen. Personal digital assistant, characterized in that. A portable terminal that receives a key event in combination with a personal digital assistant, Means for setting a key input method conversion event in the portable terminal; Means for combining with the personal digital assistant—wherein the personal digital assistant receives a display conversion event and displays a text key input screen, a game controller screen, and a user defined display screen of the personal digital assistant according to the display conversion event. Converted to any of the input device screens; And Means for converting, from the combined personal digital assistant, a key input signal input corresponding to the display of the converted display screen of the personal digital assistant to a key input signal of the portable terminal Portable terminal comprising a. delete The method of claim 17, The signal input from the personal digital assistant is by a communication port included in the personal digital assistant and a wired or wireless communication device that can be coupled to the communication port. Portable terminal characterized in that. The method of claim 17 The key input signal of the personal digital assistant is generated by a touch screen coupled to the display screen of the personal digital assistant. Portable terminal characterized in that. The method of claim 17 Means for ignoring an input signal by a key other than a predetermined key among key input devices included in the portable terminal after a key input method conversion event is set; And Means for terminating the key input method conversion event when an input signal of the predetermined key is transmitted; A portable terminal, characterized in that it further comprises. In a personal digital assistant receiving a key event in combination with a portable terminal, Means for setting a key input method conversion event in the personal digital assistant; Means for combining with the portable terminal, wherein the portable terminal receives an external output setting and is converted to output the keyboard signal of the portable terminal according to the event; And Means for converting a key input signal input from the combined portable terminal into a key input signal of the personal digital assistant Personal digital assistant comprising a. The method of claim 22, The signal input from the portable terminal is a communication port included in the portable terminal and a wired or wireless communication device capable of coupling to the communication port. Personal digital assistant, characterized in that. The method of claim 22, The personal digital assistant includes means for ignoring an input signal by a key other than a predetermined key among key input devices included in the personal digital assistant after the key input method conversion event is set; And Means for terminating the key input method conversion event when an input signal of the predetermined key is transmitted; Personal digital information terminal further comprises.

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