JP2011114718A - Portable electronic device and method for controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic device, capable of generating a password which can be easily memorized by a user and hardly guessed by someone else, and to provide a method for manufacturing the electronic portable device. <P>SOLUTION: The portable electronic device includes: an operating section 11 including a plurality of first keys to which characters and numbers are to be assigned; a display section 21 for displaying a character corresponding to an operated first key when the first key is operated; and a control section 45 for executing a numerical string-generating processing where upon the manipulation of the first key, the display section 21 displays a character string based on the manipulation, and the first numerical string corresponding to the first key manipulated at the time of the generation of the character string is stored, and upon a predetermined manipulation in the operating section 11, the second numerical string of a predetermined number of digits is generated on the basis of the first number sequence. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a portable electronic device having a plurality of keys to which letters and numbers are assigned and a method for controlling the portable electronic device.

  Some portable electronic devices are input with a personal identification number in order to restrict the use of various functions. For example, in a mobile phone, a personal identification number is input in order to restrict use of a telephone call function, a telephone book browsing function, a schedule book browsing function, an integrated circuit (IC) card function, and the like (see Patent Document 1). Thereby, even if the mobile phone is lost or the mobile phone is stolen, the other person cannot use various functions, and thus the safety becomes high.

JP 2005-244675 A

  In many cases, the personal identification number input to the portable electronic device is generally a 4-digit or 8-digit numeric string. For this reason, personal information such as a user's date of birth is often set in the personal identification number. When the personal information of the user is set as the personal identification number, the personal identification number is a numeric string that is easy for the user to memorize, but is a numeric string that is easily guessed by others. On the other hand, when a numerical string (random number) other than the user's personal information is set as the personal identification number, the user is difficult to store the personal identification number. For this reason, it has been desired to develop a method of generating a personal identification number that is difficult to guess by others other than the user and is easy for the user to remember.

  An object of the present invention is to provide a portable electronic device and a control method for the portable electronic device that can generate a password that is easy for a user to remember and difficult to guess by others.

  The portable electronic device of the present invention includes a key operation unit including a plurality of first keys to which letters and numbers are assigned, and a display that displays characters corresponding to the operated first key when the first key is operated. And when the first key is operated, a character string based on the operation is displayed on the display unit and a first number string corresponding to the first key operated at the time of generating the character string is stored. And a controller that performs a digit string generation process for generating a second digit string having a predetermined number of digits based on the first digit string when a predetermined operation is performed on the key operation unit. .

  The key operation unit may further include a second key for confirming a numeric string input by operating the first key, and the display unit may be operated by operating the first key. Both the character string and the first number string are displayed according to the numbers and characters assigned to the first key, and the control unit displays both the character string and the first number string on the display unit. When the predetermined operation is performed, a second number string having a predetermined number of digits generated by the number string generation process based on the first number string is used as a password, and the second number When the key is operated, it is preferable that the first number string is a code.

  In addition, the control unit activates a drawing application for drawing a screen having an input area for inputting a number string, and when an operation for inputting a number string to the input area is performed by the operation unit. Preferably, the number string generation process is performed based on the input by the first key, and the generated second number string is input to the input area.

  In addition, when the second number string generated by the number string generation process is input to the input area, the control unit displays not the second number string but a symbol string other than numbers in the input area. It is preferable to make it.

  In addition, when an operation for performing input to the input area is performed in a state where the drawing application is activated, the control unit displays both numbers and characters assigned to the operated first key. When the second number string is generated by the number string generation process after the first key is operated, the second number string is handled by the drawing application, and the input area is displayed in the input area. Preferably displays the symbol string.

  Moreover, it is preferable that the said control part does not display the said 2nd number sequence on the said display part, when the said 2nd number sequence is produced | generated.

  In addition, the portable electronic device further includes a communication unit capable of communicating by connecting to a public communication network, and the plurality of first keys are ten keys capable of inputting address information for making a call by the communication unit. Preferably there is.

  The present invention is a method for controlling a portable electronic device including a plurality of first keys to which letters and numbers are assigned, and when the first key is operated, displaying a character based on the operation; A step of storing a first number string corresponding to a character string displayed on the display unit by operating the first key a plurality of times, and a predetermined operation based on the first number string And a step of generating a second number string having the number of digits.

  According to the present invention, it is possible to generate a password that is easy for a user to remember and difficult to guess by others.

1 is an external perspective view of a mobile phone according to an embodiment of a mobile electronic device of the present invention. It is a functional block diagram which shows the function of a mobile telephone. It is a figure where it uses for description about a key assignment. It is a figure for demonstrating the change of the display mode of a display part when an editor application is started. It is a flowchart for demonstrating the control method of a mobile telephone. It is a flowchart explaining the operation | movement in the case of restrict | limiting use of the various functions in a mobile telephone. It is a figure for demonstrating operation | movement in the case of restrict | limiting use of the various functions in a mobile telephone. It is a flowchart explaining the operation | movement of a mobile telephone in the case of canceling | releasing the set function restriction | limiting. It is a figure for demonstrating operation | movement of the mobile telephone in the case of canceling | releasing the set function restriction.

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 is an external perspective view of a mobile phone 1 according to an embodiment of a mobile electronic device of the present invention. FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a mobile phone is a slide type in which one case is slid in one direction from a state where both cases are overlapped, or one case is rotated around an axis along the overlapping direction. The rotary type (turn type) or the type in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit (straight type, flip type) may be used.

  The mobile phone 1 includes an operation unit side body unit 2 and a display unit side body unit 3. The operation unit side body unit 2 includes an operation unit 11 (key operation unit) on the front surface unit 10 and a microphone 12 that inputs a voice uttered by the user of the mobile phone 1 during a call. The operation unit 11 includes a function setting operation key 13 for operating various functions such as various settings, a telephone book function, a mail function, and the like, and an input operation key 14 for inputting a telephone number and characters such as mail. And a determination operation key 15 for performing determination and scrolling in various operations. These keys may be arranged (displayed) on a touch panel formed integrally with the display unit 21.

  The display unit side body unit 3 includes a display unit 21 that displays various types of information on the surface unit 20 and a speaker 22 that outputs the voice of the other party on the call.

  Further, the upper end of the operation unit side body 2 and the lower end of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the cellular phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 connected via the hinge mechanism 4, thereby displaying the operation unit side body 2 and the display. The part-side casing 3 can be opened to each other (opened state), or the operation part-side casing 2 and the display-side casing 3 can be folded (folded state).

  FIG. 2 is a functional block diagram showing functions of the mobile phone 1. As shown in FIG. 2, the mobile phone 1 includes an operation unit 11, a microphone 12, a communication unit 46, an image processing unit 42, an audio processing unit 43, a memory 44, a control unit 45, and a display unit 21. And the speaker 22 and the driver IC 23 are provided in the operation unit side body 2 or the display unit side body 3. Details of the first communication unit 50 will be described later.

The communication unit 46 includes a main antenna 40 and an RF circuit unit 41.
The main antenna 40 is configured to connect to a public communication network via a base station in a predetermined use frequency band (for example, 800 MHz) and communicate with an external device. In the present embodiment, the predetermined use frequency band is 800 MHz, but other frequency bands may be used.

  The RF circuit unit 41 demodulates the signal received by the main antenna 40 and supplies the processed signal to the control unit 45. Then, the RF circuit unit 41 modulates the signal supplied from the control unit 45 and transmits it to the external device via the main antenna 40. On the other hand, the RF circuit unit 41 notifies the control unit 45 of the strength of the signal received by the main antenna 40.

  The image processing unit 42 performs predetermined image processing according to the control of the control unit 45, and outputs the processed image data to the driver IC 23. The driver IC 23 stores the image data supplied from the image processing unit 42 in the frame memory and outputs it to the display unit 21 at a predetermined timing.

  The sound processing unit 43 performs predetermined sound processing on the signal supplied from the RF circuit unit 41 under the control of the control unit 45, and outputs the processed signal to the speaker 22. The speaker 22 outputs the signal supplied from the sound processing unit 43 to the outside.

  In addition, the audio processing unit 43 processes the signal input from the microphone 12 according to the control of the control unit 45 and outputs the processed signal to the RF circuit unit 41. The RF circuit unit 41 performs a predetermined process on the signal supplied from the sound processing unit 43 and outputs the processed signal to the main antenna 40.

  The memory 44 includes, for example, a working memory and is used for arithmetic processing by the control unit 45. The memory 44 stores a plurality of applications and various tables necessary for the applications. The memory 44 may also serve as a removable external memory.

  The control unit 45 controls the entire mobile phone 1 and is configured using a central processing unit (CPU) or the like. Here, the control operation of the control unit 45 according to the key operation by the operation unit 11 will be described. In principle, the controller 45 assigns letters and numbers to each key (function setting operation key 13, input operation key 14, and determination operation key 15) constituting the operation unit 11 in accordance with the application that is currently actively activated. , Change symbols and functions.

  Specifically, when any of the keys is operated, the operation unit 11 detects the position information of the key (for example, as shown in FIG. 3A, the left column of the second row of the input operation keys 14). When a key ("1" and "A" are printed on the surface) is operated, (X2, Y1) position information) is transmitted to the control unit 45. The control unit 45 accesses the memory 44, refers to the key assignment table corresponding to the currently active application, and executes processing of symbols assigned from the position information transmitted from the operation unit 11. . For example, as shown in FIGS. 3B and 3C, the memory 44 stores a plurality of key assignment tables. FIG. 3B is a table used when making a call, and FIG. 3C is a table used in a memo pad application or a mail application.

  The execution of the symbol processing means that “1” or “A” is displayed on the display unit 21 when the currently active application is Notepad, for example.

  The memory 44 stores a plurality of key assignment tables, and the control unit 45 switches the key assignment table to be referred to according to the application, and based on the key position information transmitted from the operation unit 11. The predetermined process is executed with reference to a predetermined key assignment table.

  Next, an editor application used in the mobile phone 1 will be described. FIG. 4 is a diagram for explaining a change in the display mode of the display unit 21 when the editor application is activated.

  For example, the control unit 45 displays the standby screen 100 (screen displayed when waiting for communication or waiting for activation of an application) on the display unit 21 (FIG. 4A). )), When any of the keys constituting the input operation key 14 is operated, a character string display area 101 for displaying a character assigned to the operated key and a number assigned to the operated key are displayed. Control is performed so that both the display unit 102 and the numeric string display area 102 to be displayed are displayed on the display unit 21 instead of the standby screen 100 (see FIG. 4B).

  Here, as illustrated in FIG. 4, in a state where the standby screen 100 is displayed on the display unit 21 (see FIG. 4A), “0” and “Waon” are printed on the surface. When the key is operated, the control unit 45 controls to display “WA” in the character string display area 101 and controls to display “0” in the number string display area 102 (FIG. 4 ( b)). When the keys constituting the input operation key 14 are continuously operated a plurality of times, “WATANABE” is displayed in the character string display area 101, and “0456666 *” is displayed in the numeric string display area 102. (See FIG. 4 (c)).

  Here, when any one of the input operation keys 14 is operated while the standby screen 100 is displayed on the display unit, the character string display area 101 and the number string display area 102 are displayed. An example in which the above is displayed on the display unit 21 has been described. However, when the application is activated, the control unit 45 performs an operation for starting the editor application (an operation for displaying the character string display area 101 and the number string display area 102 on the display unit 21). The character string display area 101 and the numeric string display area 102 may be displayed on the display unit 21. In addition, the control unit 45 is in a state where a selection screen for restricting (locking) use of the telephone call function, the address book browsing function, the schedule book browsing function, the IC card function or the mail function is displayed on the display unit 21. When the selection process (a process selected for restricting the use of any function) is performed, the character string display area 101 and the numeric string display area 102 may be displayed on the display unit 21.

  Further, in a state in which the character string display area 101 and the numeric string display area 102 are displayed on the display unit 21 (see FIGS. 4B and 4C), the call key 16 (third key: FIG. 1). When the operation (see) is operated, the control unit 45 performs control related to the telephone call by using the numbers displayed in the number string display area 102 as telephone numbers.

  Thereafter, when the determination operation key 15 is operated up and down, the control unit 45 executes a process of converting the character (kana) displayed in the character string display area 101 into kanji, and the character string display area 101 is displayed. It controls so that it may be displayed over the part 21 (display screen) (refer FIG.4 (d)).

The mobile phone 1 configured as described above has a function of generating a numeric string based on a character string input by operating a key.
Below, the structure and operation | movement for exhibiting the said function which concerns on the mobile telephone 1 are explained in full detail. First, a configuration for exerting the above functions of the mobile phone 1 according to the present embodiment will be described with reference to FIG.

The operation unit 11 includes a plurality of input operation keys 14 (first keys) to which letters and numbers are assigned.
When the input operation key 14 is operated, the display unit 21 displays characters corresponding to the operated input operation key 14.

  When the input operation key 14 is operated, the control unit 45 causes the display unit 21 to display a character string based on this operation, and stores a first number string corresponding to the input operation key 14 operated when the character string is generated. Then, when a predetermined operation is performed on the operation unit 11, a number string generation process for generating a second number string having a predetermined number of digits based on the first number string is performed.

  For example, when the input operation key 14 is operated to cause the mobile phone 1 to input the character string “Sakura Sakura”, the control unit 45 activates the editor application. When the editor application is activated, the control unit 45 causes the editor application to input characters assigned to the operated input operation key 14. Further, the control unit 45 controls the display unit 21 to display the character string display area 101, and displays the character string “Sakura Saku” (characters assigned to the operated input operation key 14) in the character string display area 101. Let them enter.

  The control unit 45 stores, in the memory 44 (buffer), the first number string “322293222” based on the number assigned to the input operation key 14 operated to generate the character string “Sakura Sakura”. For example, when a key to which a function for executing a digit string generation process is operated (a predetermined operation is performed), the control unit 45 stores the first numeral string “322293222” stored in the memory 44. A second number string having a predetermined number of digits is generated based on the above.

  Here, an example of a method for generating the second number string will be described. That is, the control unit 45 may perform the process of adding adjacent numbers in the first number string and arranging the last one digit until the predetermined number of digits is reached.

As a specific example, when the first number string is “322293222” and the predetermined number of digits is four, the control unit 45 sets the first digit “2” and the tenth digit “2”. ”, The tens digit“ 2 ”and the hundreds digit“ 2 ”, and the hundreds digit“ 2 ”and the thousands digit“ 3 ”are added. The process is performed for all the places of the first digit string. The number string obtained by this processing is “54412544”.
Next, the control unit 45 adds the first digit “4” and the tenth digit “4” to the digit string “54412544” in the same manner as described above, and adds the tenth digit “4”. The process of adding the thousands digit “5” is performed for the entire digit string. The number string obtained by this processing is “98553798”.
The control unit 45 repeatedly executes the above-described processing until the obtained numeric string becomes four digits. The second number string obtained by repeating the above process is “1949”.
The generation method of the second number string is not limited to the above example, and other generation methods may be used. In addition, only four digits are illustrated as the predetermined number of digits, and may be selected. In addition, the above method shows an example in which the number of digits is reduced from that of the first numeric string, but conversely, for example, by repeating the first numeric string twice and performing the above method, the number of digits is increased. Can also be supported.

Next, a control method of the mobile phone 1 having the above configuration will be described. FIG. 5 is a flowchart for explaining a control method of the mobile phone 1.
The cellular phone 1 performs a display step S1, a storage step S2, and a generation step S3.
In the display step S1, when the input operation key 14 is operated, the display unit 21 displays characters based on this operation.
In the storing step S2, the memory 44 stores a first number string corresponding to a character string displayed on the display unit 21 when the input operation key 14 is operated a plurality of times.
In the generation step S3, when a predetermined operation is performed, the control unit 45 generates a second number string having a predetermined number of digits based on the first number string.

  As described above, the mobile phone 1 inputs the character string to the character string display area 101 (editor application) by operating the input operation key 14 and corresponds to the input operation key 14 operated at the time of generating the character string. A second number string is generated based on the one number string. For this reason, the mobile phone 1 can make it difficult for another person other than the user to guess the second number string. In addition, the user can memorize character strings that are easy to memorize.

  It is preferable that the operation unit 11 further includes a determination operation key 15 (second key) for confirming a numeric string input by operating the input operation key 14. In this case, when the input operation key 14 is operated, both the character string and the first number string are displayed on the display unit 21 according to the numbers and characters assigned to the operated input operation key 14. Is done. Further, the control unit 45 displays both the character string and the first number string on the display unit 21, and when a predetermined operation is performed, the control unit 45 generates the number string based on the first number string. The second number string having a predetermined number of digits is used as a password, and when the determination operation key 15 is operated, the first number string is set as a password.

  When any key constituting the input operation key 14 is operated, the control unit 45 activates the editor application and causes the editor application to input characters and numbers assigned to the operated input operation key 14. . The control unit 45 controls the display unit 21 to display the character string display area 101 and the number string display area 102. The control unit 45 causes a character assigned to the operated input operation key 14 to be input to the character string display area 101 and causes a number assigned to the operated input operation key 14 to be input to the number string display area 102. When the input operation key 14 is operated a plurality of times, the control unit 45 causes the numbers assigned to the operated input operation keys 14 to be sequentially input to the number string display area 102. Thereby, the number string display area 102 displays the first number string.

  Further, the control unit 45 stores the first numeric string in the memory 44 (buffer). When the first numeric string is stored in the memory 44, the control unit 45 determines whether a predetermined operation for executing the numeric string generation process is detected or an operation of the decision operation key 15 is detected. . When the control unit 45 detects a predetermined operation, the control unit 45 generates a second number string having a predetermined number of digits based on the first number string stored in the memory 44, and uses the second number string as a password. To do. In addition, when the control unit 45 detects the operation of the determination operation key 15, the control unit 45 uses the first number string stored in the memory 44 as a password.

  As described above, the mobile phone 1 inputs the character string to the character string display area 101 (editor application) by operating the input operation key 14 and corresponds to the input operation key 14 operated at the time of generating the character string. Either one numeric string or a second numeric string generated based on the first numeric string is treated as a password. For this reason, since the mobile phone 1 has two number strings that are password code candidates, it may be difficult for another person to guess which of the first number string and the second number string is treated as the password code. it can.

  Further, the control unit 45 activates a drawing application for drawing a screen having an input area for inputting a number string, and when an operation for inputting a number string to the input area is performed by the operation unit 11, It is preferable to perform a numeric string generation process based on an input by the input operation key 14 and input the generated second numeric string to the input area.

The drawing application is, for example, a browser for connecting to a server on the Internet using the communication unit 46 and browsing information such as a Web page.
Here, the input area into which a numeric string is input is, for example, an area for inputting a personal identification code in a Web page described in HTML or the like in the Web page.
For example, when a drawing application is activated, an operation for causing a numeric string to be input to the input area is assigned a function for starting the editor application to any key constituting the operation unit 11, and the function is assigned. The key that was pressed was operated.

  When the drawing application is activated, the control unit 45 displays the input area on the display unit 21 and, in the selected state, when the key to which the function for starting the editor application is assigned is operated, Start the application. When the input operation key 14 is operated in a state in which the editor application is activated, the control unit 45 displays a character string based on this operation on the display unit 21 and displays the character string on the input operation key 14 operated at the time of generating the character string. A corresponding first number string is stored, and when a predetermined operation is performed on the operation unit 11, a number string generating process for generating a second number string having a predetermined number of digits based on the first number string is performed. The control unit 45 causes the generated second number string to be input to the input area.

  As described above, even when the input area is displayed on the display unit 21 in a state where the drawing application is activated, the mobile phone 1 is generated by performing the number string generation process based on the input by the input operation key 14. The second number string is input to the input area. For this reason, the mobile phone 1 can make it difficult for another person other than the user to analogize the second number string to be input to the input area. In addition, the user can memorize character strings that are easy to memorize.

In addition, when the second number string generated by the number string generation process is input to the input area, the control unit 45 preferably displays a symbol string other than numbers in the input area instead of the second number string.
As an example of the symbol string, it is sufficient if symbols such as asterisks, sharps, circles, and rectangles are arranged in a number corresponding to the number of digits of the second digit string. As a more specific example, when the second numeric string “1949” is input to the input area, the control unit 45 displays the symbol string “***” in the input area.
Therefore, the mobile phone 1 can make it difficult for another person other than the user to guess the second number string to be input to the input area.

Moreover, when the control part 45 produces | generates a 2nd number sequence, it is preferable not to display the 2nd number sequence on the display part 21. FIG. That is, the control unit 45 controls the display unit 21 not to display the second number string generated by the number string generation process and the second number string input to the input area.
Therefore, the mobile phone 1 can make it difficult for the second digit string to be inferred by others other than the user.

  In addition, when an operation for performing input to the input area is performed in a state in which the drawing application is activated, the control unit 45 performs a process of displaying both numbers and characters assigned to the operated input operation key 14. When the second digit string is generated by the digit string generation process after the input operation key 14 is operated, the second digit string is handled by the drawing application, while the symbol string is displayed in the input area. It is preferable to make it.

The control unit 45 activates the editor application when the input operation key 14 is operated in a state where the drawing application is activated and the input area is displayed on the display unit 21. The control unit 45 causes the activated editor application to input characters and numbers assigned to the operated input operation key 14. The control unit 45 causes the character string display area 101 displayed on the display unit 21 to input a character assigned to the operated input operation key 14. Further, the control unit 45 causes the number string display area 102 displayed on the display unit 21 to input a number assigned to the operated input operation key 14. Furthermore, the control unit 45 stores a first number string based on the number assigned to the operated input operation key 14 in the memory 44 (buffer), and when a predetermined operation is performed on the operation unit 11, the first number A number string generation process for generating a second number string having a predetermined number of digits based on the string is performed. The control unit 45 causes the drawing application to handle the second number string so that the generated second number string is used for processing of the drawing application, while displaying a symbol string in the input area.
Therefore, the mobile phone 1 can make it difficult for another person other than the user to guess the second number string to be input to the input area.

Moreover, it is preferable that the cellular phone 1 further includes a communication unit 46 that can communicate with the public communication network. In this case, the plurality of input operation keys 14 are numeric keys capable of inputting address information for making a call by the communication unit 46, that is, a telephone number, a mail address, and the like.
Therefore, the present invention can be adopted in the mobile phone 1 having the input operation key 14 for inputting the telephone number without providing a separate input operation key.

Next, an example of the operation in the mobile phone 1 will be described.
First, an operation for restricting the use of various functions in the mobile phone 1 will be described. FIG. 6 is a flowchart for explaining the operation when the use of various functions in the mobile phone 1 is restricted. FIG. 7 is a diagram for explaining an operation when the use of various functions in the mobile phone 1 is restricted.

As shown in FIG. 6, in step S <b> 100, the control unit 45 detects an operation for restricting the use of various functions in the mobile phone 1 (an entry operation for displaying a password setting screen).
In step S <b> 101, the control unit 45 performs display update in order to display on the display unit 21 a screen (password code setting screen) for selecting a function that restricts use.

  In step S <b> 102, the control unit 45 detects a selection operation of a function that restricts use (selection operation of a password setting function). For example, as a function to restrict use, the control unit 45 restricts outgoing calls (outgoing restriction), restricts browsing of the address book (address book restriction), and restricts viewing of the schedule book (schedule book). Restriction), use of the IC card function is restricted (card function restriction), and mail transmission is restricted (mail restriction), and an address book restriction selection operation is detected (FIG. 7 ( A)).

In step S <b> 103, the control unit 45 displays a password input screen on the display unit 21. That is, the control unit 45 activates the editor application and causes the display unit 21 to display the character string display area 101 and the numeric string display area 102.
Thereafter, for example, when the input operation key 14 is operated to input the character string “Sakura Saku” to the editor application, the control unit 45 performs the character string “based on the character assigned to the operated input operation key 14. "Sakura Sakura" is input to the character string display area 101, and a numeric string "322293222" based on the number assigned to the operated input operation key 14 is input to the numeric string display area 102 (see FIG. 7B).

In step S <b> 104, the control unit 45 detects a confirmation operation for the first numeric string (character string) input to the editor application.
In step S105, the control unit 45 performs a numeric string generation process for generating a second numeric string based on the first numeric string.
When the second number string is generated by the number string generating process, the control unit 45 performs setting for restricting browsing of the schedule book, for example, and displays the setting result “address book lock set” on the display unit 21. It is displayed (see FIG. 7C).
In step S106, the second number string generated by the number string generating process in step S105 is stored in the memory 44 (buffer) (see FIG. 7D).

  Next, when the function of the mobile phone 1 is restricted, an operation for releasing the restriction will be described. FIG. 8 is a flowchart for explaining the operation of the mobile phone 1 when canceling the set function restriction. FIG. 9 is a diagram for explaining the operation of the mobile phone 1 when canceling the set function restriction.

  In step S <b> 200, the control unit 45 detects that any key constituting the operation unit 11 has been operated. For example, the control unit 45 detects that a key 13a (see FIG. 9A) to which a function for displaying an address book on the display unit 21 is assigned is operated.

  In step S201, the control unit 45 determines whether or not a screen (see FIG. 9B) for inputting a password is displayed on the display unit 21. When the password input screen is displayed (Yes), the process proceeds to step S202. If the code code input screen is not displayed (No), other processing (for example, processing for displaying the address book on the display unit 21) is performed.

In step S202, the control unit 45 activates an editor application.
In step S203, the control unit 45 detects that the input operation key 14 has been operated.
For example, the control unit 45 causes the character string display area 101 to input and display a character string “Sakura Saku” based on a character assigned to the input operation key 14 in which the operation is detected (see FIG. 9C). In addition, the control unit 45 causes the number string display area 102 to input the first number string “322293222” based on the number assigned to the input operation key 14 in which the operation is detected (see FIG. 9C).

In step S <b> 204, the control unit 45 detects a confirmation operation for the first numeric string (character string) input to the editor application.
In step S205, the control unit 45 performs a numeric string generation process for generating a second numeric string based on the first numeric string.

In step S206, the control unit 45 stores the second numeric string generated by the numeric string generation process in step S205 in the memory 44 (buffer).
In step S207, the control unit 45 performs processing for releasing the function restriction (function lock). For example, the address book restriction is canceled and the address book can be browsed. Furthermore, the control unit 45 causes the display unit 21 to display the function restriction release result “address book restriction released” (see FIG. 9D). Thereafter, the control unit 45 displays the address book on the display unit 21 (see FIG. 9E).

  In the description using FIG. 6 and FIG. 8, the use of various functions in the mobile phone 1 has been described. However, the operation of the mobile phone 1 of the present invention is not limited to this embodiment. For example, the process from step S100 to step S103 shown in FIG. 6 is replaced with a process in which a web page including a code number input area is displayed on the display unit 21 by a browser and the code number input area is selected. Also good. In this case, the processing of steps S200 and S201 shown in FIG. 8 is performed on the display unit 21 with the web page of the personal identification number confirmation screen of the site related to the web page accessed in the replaced processing described above. Thus, it may be replaced with a process of determining whether or not a password input operation has been detected.

  In the above-described embodiment, the case where the mobile electronic device of the present invention is applied to the mobile phone 1 has been described. However, the present invention is not limited to this embodiment, and can also be applied to portable electronic devices such as PHS (Personal Handyphone System), PDA (Personal Digital Assistant), and portable navigation devices.

1 Mobile phone (mobile electronic device)
11 Operation part (key operation part)
14 Input operation keys (first key)
15 Enter operation key (second key)
21 Display unit 45 Control unit 46 Communication unit

Claims (8)

A key operation unit including a plurality of first keys to which letters and numbers are assigned;
When the first key is operated, a display unit that displays characters corresponding to the operated first key;
When the first key is operated, a character string based on the operation is displayed on the display unit, and a first numeric string corresponding to the first key operated when the character string is generated is stored, and the key operation is performed. And a control unit that performs a digit string generation process for generating a second digit string having a predetermined number of digits based on the first digit string when a predetermined operation is performed in the unit. The key operation unit further includes a second key for confirming a numeric string input by operating the first key,
The display unit displays both the character string and the first number string according to the numbers and letters assigned to the operated first key by operating the first key,
The control unit displays both the character string and the first number string on the display unit, and generates the number string based on the first number string when the predetermined operation is performed. 2. The portable electronic device according to claim 1, wherein a second number string of a predetermined number of digits generated by the process is used as a password code, and the first number string is set as a password code when the second key is operated. .   The control unit activates a drawing application that draws a screen having an input area for inputting a numeric string, and when an operation for inputting a numeric string to the input area is performed by the operation unit, 3. The portable electronic device according to claim 1, wherein the number string generation process is performed based on an input by a first key, and the generated second number string is input to the input area.   The control unit causes the input area to display a symbol string other than a number instead of the second number string when the second number string generated by the number string generating process is input to the input area. Item 4. The portable electronic device according to Item 3.   When an operation for performing input to the input area is performed in a state where the drawing application is activated, the control unit performs a process of displaying both numbers and characters assigned to the operated first key. When the editor application is started and the second number string is generated by the number string generation process after the first key is operated, the second number string is handled by the drawing application, while the input area The portable electronic device according to claim 4, wherein a symbol string is displayed.   The portable electronic device according to claim 1, wherein the control unit does not display the second number string on the display unit when the second number string is generated. It further includes a communication unit capable of communicating by connecting to a public communication network,
7. The portable electronic device according to claim 1, wherein the plurality of first keys are numeric keys capable of inputting address information for making a call by the communication unit. A method for controlling a portable electronic device comprising a plurality of first keys to which letters and numbers are assigned,
When the first key is operated, displaying a character based on the operation;
Storing a first number string corresponding to a character string displayed on the display unit by operating the first key a plurality of times;
And a step of generating a second number string having a predetermined number of digits based on the first number string when a predetermined operation is performed.

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