JP2011028429A - Character input device and update method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set the time when an automatic cursor function operates according to such situations that a user inputs characters. <P>SOLUTION: A character input device includes a plurality of keys each of which is assigned with a plurality of characters, and when the depression of the keys is detected, one character among characters assigned to the key is selected, and after the lapse of a determination time as a predetermined time since the key is detected, the selected character is determined, and a depression time as a time since the depression of the key is detected until the depression of the key is detected the next is obtained and stored, and the determination time is updated with a value calculated by using the rate of a value calculated based on a plurality of previous depression intervals to a value calculated based on the depression intervals stored in the depression interval storage means including any depression time other than the plurality of previous intervals. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for inputting characters using a key.

  When a user composes an e-mail, etc. on a mobile terminal such as a mobile phone, characters such as “A line” to “Wa line” and numbers, symbols, pictures, etc. are input by operating the assigned keys. .

  Since mobile devices are becoming smaller and the area where keys that can be operated by humans are limited, it is possible to input more characters than the number of keys by assigning multiple characters to one key. .

  When inputting one of a plurality of characters assigned to a key, the character is switched by continuously pressing the key, and the desired character is input by performing a confirmation operation when the key is switched to the desired character. To do. The confirmation operation is pressing a different key or moving a cursor.

  When two characters assigned to different keys are continuously input, pressing the key for inputting the second character also plays a role of the operation of determining the first character. However, when two characters assigned to the same key are input consecutively, pressing the key for inputting the second character does not constitute the operation for determining the first character, so the first character is determined. In order to do this, it is necessary to perform a definite operation such as moving the cursor.

  Here, instead of the confirmation operation, there is a technique for confirming a character and moving a cursor when a predetermined time elapses after the key is pressed (hereinafter referred to as “automatic cursor function”). According to this technique, there is an advantage that when a character assigned to the same key is continuously input, an operation such as cursor movement need not be performed.

  In addition, there is a technique for changing the predetermined time (hereinafter referred to as “determination time”) until the character is determined according to the user.

  For example, there is a technique in which an average time of intervals at which a user presses a key is set as a fixed time (see Patent Document 1). This is because the key pressing interval varies depending on the degree of proficiency for each user, etc., and it is considered that a user with a short pressing interval has better usability when the confirmation time is shorter.

JP 2002-207554 A

  However, with this technique, it is possible to determine a fixed time corresponding to the user's individual key press interval, but it is not possible to determine a fixed time corresponding to the user's current key press interval.

  For example, the key press interval when composing mail on a train is often longer due to the influence of train shaking or the like than the key press interval when composing mail at home or the like. In this case, when the average time of the past key pressing intervals is set as the fixed time, the usability may be deteriorated. That is, the determination time is too short for the current key pressing interval, and the automatic cursor function may operate unexpectedly. In other words, there is a possibility that a character that is not scheduled by the user (hereinafter, referred to as “false confirmation”) may be determined.

  Accordingly, an object of the present invention is to set a fixed time according to a situation where a user is inputting characters.

  The character input device according to one aspect of the present invention, when detecting a plurality of keys each assigned a plurality of characters and a key press, selects one character from the characters assigned to the key, When the elapsed time from the detection has passed the fixed time, which is the predetermined time, the character confirmation means for confirming the selected character, and the key press is detected next after the key press is detected An acquisition means for acquiring a pressing interval that is a time until time, a pressing interval storage means for storing the acquired pressing interval, a value obtained based on a plurality of immediately preceding pressing intervals, and a plurality of pressing intervals other than the immediately preceding pressing intervals A confirmation time update means for updating the confirmation time with a value obtained by using a ratio with a value obtained based on the depression interval stored in the depression interval storage means including the depression interval.

  The character input device having the above configuration can obtain and set a fixed time according to a situation where the user is inputting characters.

It is a figure which shows the example of the screen at the time of the external appearance of a mobile telephone, and a character input process. It is a time chart which shows the operation example of a session and an automatic cursor function. It is a block diagram which shows the example of a functional structure of a mobile telephone. It is a figure which shows the example of a structure and content of a pressing interval table. It is a figure which shows the example of the procedure at the time of calculating fixed time. It is a flowchart which shows the character input process of a mobile telephone. It is a flowchart of the process which calculates reference | standard decision time. It is a flowchart of calculation and update processing of a new confirmation time. It is a time chart which shows the example of an incorrect decision pattern. 6 is a block diagram illustrating an example of a functional configuration of a mobile phone according to Embodiment 2. FIG. It is a figure which shows the example of a structure and content of the pressing interval table of Embodiment 2. It is a figure which shows the example of a structure and content of a session evaluation table. It is a figure which shows the example of the procedure at the time of calculating the fixed time of Embodiment 2. It is a figure which shows the example of analysis of the session group by a decision tree. 10 is a flowchart illustrating character input processing of the mobile phone according to the second embodiment. 10 is a flowchart of a new determination time calculation and update process according to the second embodiment.

<Embodiment 1>
In the character input process performed by the character input device according to the first embodiment, instead of using the average time of past key press intervals as the fixed time indicating the timing at which the automatic cursor function operates, it represents the current user status. The average time corrected based on the current key press interval is used. The user's situation refers to the user's physical condition, the content of the sentence being created, the level of proficiency of key operations, the working environment such as riding on a train, and the like.

  In order to extract the current key press interval of the user who is performing the input operation, the first embodiment adopts the concept of session.

  A session is a predetermined time period during which a user's series of character input operations are performed, and is a time period that is delimited by a key pressing interval for a certain period of time. As a depressing interval (hereinafter referred to as “session boundary time”) as a break, a time sufficiently longer than the fixed time, for example, 1 minute is used. The fact that no character is input for one minute is because it can be estimated that the user's situation may have changed before and after that.

  The character input device according to the first embodiment stores key press intervals in association with sessions.

  Then, the fixed time in the current session is obtained based on the pressing interval in the current session and the pressing interval in the past session. In detail, the pressing interval after the current session is started is observed, and the determined time of the current session is corrected based on the determined time in the past session. That is, since the confirmation time is corrected by observing the pressing interval that reflects the situation where the user is currently placed, the automatic cursor function is more convenient for the user.

  Also, even when a user who is different from the normal user temporarily uses the character input device, the fixed interval is corrected according to the proficiency level of the different user, so it is temporarily used. This is an automatic cursor function that is more user-friendly for the user.

  Hereinafter, a mobile phone will be described as an example of a character input device.

<Function>
FIG. 1 is a diagram illustrating an example of the appearance of a mobile phone and a screen during character input processing.

  The cellular phone 1000 is a so-called foldable cellular phone, and FIG. 1 shows the opened cellular phone 1000 as viewed from the front.

  The mobile phone 1000 includes a first housing 1001, a second housing 1002, and a hinge 1003 that couples these.

  The first housing 1001 includes a display 1004.

  When the user inputs characters, the display 1004 displays two screens side by side. They are a character input screen 1005 and a soft key display screen 1006.

  A character input screen 1005 is a screen for displaying a text such as an email created by the user, and is a screen for displaying an input kana character or the like.

  A soft key display screen 1006 is a screen for displaying soft keys used in the character input process.

  The soft key “confirm” displayed on the soft key display screen 1006 is a key for confirming the input kana characters and the character string after the kana-kanji conversion, and the soft key “picture” displays pictograms and the like. Key. The soft key “alphanumeric” is a key for switching to a mode for inputting letters, numbers, and the like.

  The second housing 1002 includes operation keys. The operation keys are classified into a soft key corresponding key 10, a function key 20, and a character input key 30.

  Of the soft key corresponding keys 10, the key 11 corresponds to the soft key “OK”. The key 12 and the key 13 correspond to the soft key “alphanumeric” and the soft key “picture”, respectively.

  The key 14 is a cursor key used to move the cursor displayed on the display 1004 up, down, left and right. For example, it is used to confirm the entered kana character and advance the cursor.

  The key “call” of the function key 20 is a telephone call key, and the key “disconnect” is a telephone call disconnect key. These two keys are not used in the character input process.

  The key “clear” is a key for deleting a kana character string or the like displayed on the character input screen 1005.

  The character input key 30 is a so-called numeric keypad, and is a key for inputting characters associated with each key. In FIG. 1, numbers are described for each key, but “A” to “W” are associated with the numbers. For example, “A” is assigned to the key “1”, and “K” is assigned to the key “2”.

  Next, an operation example of the session and the automatic cursor function will be described with reference to FIG.

  FIG. 2 is a time chart showing an operation example of the session and the automatic cursor function.

  In this example, it is assumed that the determination time is 1000 msec (milliseconds). The session boundary time is assumed to be 1 minute, that is, 60000 msec.

  The first row shows the session ID. The session ID is a session identifier.

  The second row shows the identifier of the pressed key. The number in the rounded rectangle is the number described in the pressed key and is the key identifier.

  The third row shows the pressing interval. The unit indicating the interval is msec (millisecond). The cellular phone 1000 stores this pressing interval.

  The fourth row shows the displayed characters. A kana character displayed on the character input screen 1005 when the key shown in the second row is pressed is shown. Characters that have not yet been determined are hereinafter referred to as “display characters”.

  The fifth row shows the confirmed characters. A kana character determined by pressing the key shown in the second row or determined by the automatic cursor function in accordance with the pressing interval shown in the third row is shown. The characters in the rectangle are fixed kana characters. The confirmed character is hereinafter referred to as “determined character”.

  Transition screen 1 to transition screen 7 in the lowermost row show the transition of characters displayed on the character input screen 1005. A black rectangle indicates the cursor.

  First, the key “3” is pressed, and the display character “sa” is displayed on the character input screen 1005. This pressing starts a session with a session ID “432”, which is a new session. This is because the pressing interval until the key “3” is pressed is “60100” msec exceeding the session boundary time.

  Next, after the pressing interval “455” msec elapses, the key “3” is pressed, and the display character “shi” is displayed on the character input screen 1005 (see transition screen 1). Further, the key “3” is pressed twice in succession, and the display characters “SU” and “SE” are sequentially displayed (see transition screen 2 and transition screen 3). When the display character “SE” is displayed, a fixed time of 1000 msec elapses and the automatic cursor function is activated. That is, the display character “SE” is confirmed, and the cursor moves to the next character (see transition screen 4).

  Next, after the pressing interval “1220” msec elapses, the key “2” is pressed, and “ka” is displayed on the character input screen 1005 (see transition screen 5). After the pressing interval “780” msec elapses, the key “1” is pressed, the display character “ka” is confirmed, and “a” is displayed (see transition screen 6). After the pressing interval “487” msec elapses, the key “1” is pressed again to display “I” (see transition screen 7). Thereafter, a fixed time of 1000 msec elapses, the automatic cursor function is activated, “I” is fixed, and the cursor moves. Thereafter, the character input process is continued.

  When the key “4” is pressed after the pressing interval of “70000” msec exceeding the session boundary time, the session with the session ID “432” is terminated and the session with the new session ID “433” is started. Is done.

  The mobile phone 1000 stores a predetermined number, for example, 1000 sessions, of pressing intervals associated with session IDs.

  Next, functions of the mobile phone 1000 will be described with reference to FIG.

  FIG. 3 is a block diagram illustrating an example of a functional configuration of the mobile phone 1000.

  A cellular phone 1000 includes an overall control unit 1010, an operation unit 1020, a display 1030, a character input control unit 1100, a character display unit 1200, an automatic cursor unit 1300, a press interval detection unit 1400, a press interval addition unit 1500, and a reference determination time calculation unit. 1600, a press interval average calculation unit 1700, a fixed time calculation unit 1800, a fixed time storage unit 2000, and a press interval storage unit 2100.

  The overall control unit 1010 has a function of performing general control processes necessary for the mobile phone 1000, such as making calls, incoming calls, and creating mails, and transferring control to the character input control unit 1100 when performing character input processes. .

  Next, the operation unit 1020 includes an operation key of the second casing 1002 and has a function of detecting an operation from the user, for example, a key press.

  The display 1030 includes a liquid crystal display panel, and has a function of displaying a mail text or the like on the display panel according to an instruction from the character display unit 1200.

  The character input control unit 1100 has a function of issuing an instruction to each function unit described below to perform character input processing. For example, the pressing interval detection unit 1400 is notified that the key has been pressed, and a pressing interval detection request is made. Further, the pressed key is notified to the character display unit 1200, and a character display request is made on the character input screen 1005.

  The character display unit 1200 has a function of displaying characters, a cursor, and the like on the character input screen 1005 of the display 1030. When the character input control unit 1100 notifies that the key for instructing the cursor movement to the right is pressed, the display character is confirmed and the cursor is moved. Similarly, when the notification that the confirmation time has elapsed is received from the automatic cursor unit 1300, the display character is confirmed and the cursor is moved.

  The automatic cursor portion 1300 has a function of notifying the character display portion 1200 when the fixed time has passed with the display characters being displayed. Specifically, the time measurement is started from the time when the character display unit 1200 is notified that the display character is displayed by pressing the key, and when the measurement time exceeds the fixed time, the fact is displayed. The character display unit 1200 is notified.

  The pressing interval detection unit 1400 has a function of measuring a key pressing interval. More specifically, time measurement is started when a notification that a key has been pressed is received from the character input control unit 1100. When the next notification that the key is pressed is received, the press interval detection unit 1400 notifies the press interval adding unit 1500 of the measured time as the press interval. Then, time measurement is newly started.

  Furthermore, when the pressing interval, which is the measured time, exceeds the session boundary time, the pressing interval detection unit 1400 notifies the pressing interval addition unit 1500 and the reference determination time calculation unit 1600 that the session has ended. Do.

  The pressing interval adding unit 1500 has a function of adding a record to the pressing interval table stored in the pressing interval storage unit 2100. The pressing interval table will be described in the section <Data>. Also, periodically, for example, every time five records are added, the fixed time calculation unit 1800 is requested to determine the fixed time.

  The reference determination time calculation unit 1600 has a function of calculating the reference determination time based on the past session pressing interval. The reference fixed time is a fixed time estimated to be a normal fixed time in a past session. The method for obtaining the reference fixed time will be described in the section <How to determine the fixed time>.

  The press interval average calculation unit 1700 has a function of calculating the average of the press intervals of the past session and the current session. Note that the average pressing interval of the current session is an average of several pressing intervals up to the present time in the middle of the session, for example, an average of five pressing intervals.

  The fixed time calculation unit 1800 has a function of obtaining a fixed time in the current session. The determined time obtained here is used as the determined time in the current session thereafter.

  In addition, the fixed time calculation unit 1800 periodically determines the fixed time. For example, every time there are five pressings, a request is made from the pressing interval adding unit 1500 to obtain a fixed time. By regularly updating the confirmation time, it is possible to obtain a confirmation time that closely reflects the user's situation.

  The fixed time storage unit 2000 has a function of storing the fixed time.

  The press interval storage unit 2100 has a function of storing a press interval table.

  All or part of the functions described above are realized by the CPU of the mobile phone 1000 executing a program recorded in the memory or the like of the mobile phone 1000.

<Data>
Next, data used in the mobile phone 1000 according to the first embodiment will be described with reference to FIG. Data described with reference to FIG. 4 is data stored in the press interval storage unit 2100.

  FIG. 4 is a diagram illustrating an example of the configuration and contents of the pressing interval table 2110.

  One record is added to the pressing interval table 2110 each time a key is pressed by the user.

  The press interval table 2110 includes a session ID 2111, a press key 2112, a press interval 2113, and a key type 2114.

  The session ID 2111 indicates a session identifier.

  The pressed key 2112 indicates the identifier of the pressed key. In this table, when the pressed key is the character input key 30 (see FIG. 1), the number written on the key is described as an identifier. If the pressed key is the function key 20, “clear” or the like is described. In the first embodiment, only the character input key and the clear key 15 are registered in the pressing interval table 2110.

  The pressing interval 2113 indicates the time until the key indicated by the pressing key 2112 is pressed, that is, the time from when the key indicated by the pressing key 2112 of the previous record is pressed.

  The key type 2114 indicates whether the key indicated by the pressed key 2112 is the same as or different from the key indicated by the pressed key 2112 of the previous record.

  Key type 2114 “same” indicates that the same key as the previous one was pressed, and “different” indicates that a key different from the previous one was pressed. In the case of the first record of the session, “−” is set regardless of the previous key.

  For example, a record in which the session ID 2111 is “432”, the press key 2112 is “3”, the press interval 2113 is “455”, and the key type 2114 is “same” is a number in the session indicated by the session ID “432”. This indicates that the key described with “3” is pressed, is pressed after “455” msec since the key was pressed most recently, and is the same key as the key pressed most recently.

<How to determine the fixed time>
Here, how to determine the fixed time in the character input process of the mobile phone 1000 according to the first embodiment will be described with reference to FIG. When the mobile phone 1000 starts to be used, a predetermined initial value, for example, 1000 msec is set as the fixed time.

  FIG. 5 is a diagram showing a procedure when the mobile phone 1000 calculates the fixed time.

  First, unique sessions are excluded in advance from the past session data in the press interval table 2110 stored in the press interval storage unit 2100.

  For example, an average pressing interval that is an average value of pressing intervals is calculated for each session, and an average μ and an average deviation σ of the average pressing interval of the session set are calculated. Only sessions whose average pressing interval of each session is in the range of μ ± Nσ with respect to a predetermined constant value N are extracted.

  Next, a reference determination time is calculated based on the extracted session pressing interval (step S12). In the first embodiment, the reference determination time is calculated by one of the following two methods.

  In the first method, an average of the pressed intervals of all the extracted sessions is calculated, and a predetermined constant multiple value, for example, a value of 1.2 times the average is obtained and used as a reference confirmation time (step S10).

  In the second method, a predetermined quantile value of the pressed intervals of all extracted sessions, for example, a value that is 75 percent quantile is obtained and set as a reference fixed time (step S11).

  In the processing of step S10 and step S11, the reference determination time is obtained using only the pressing interval of the same key among the extracted pressing intervals of the session. Specifically, the reference determination time is obtained using only the record with the key type 2114 of the pressing interval table 2110 being “same”. The automatic cursor function is activated when the same key is pressed continuously. Therefore, the reference confirmation time obtained using only the record with the key type 2114 of “same” is a reference decision time closer to the ideal than the reference confirmation time obtained using the record with the key type 2114 of “different”. This is because there is a high possibility that it can be obtained.

  It should be noted that not only the pressing interval of the same key but also the pressing interval of all keys may be used.

  Next, the determined reference determination time is corrected based on the user's situation in the current session, and a new determination time of the current session is determined (step S16).

  The average value of the pressed intervals in the past session extracted (step S13) and the average value of the pressed intervals in the current session (step S14) are obtained. The average value of the pressing intervals in the current session may be the average value of all the pressing intervals up to the present time in the current session or the average value of the new pressing intervals for five times.

  The ratio of the average value of the current session to the average value of the past session is obtained (step S15), and the obtained ratio is multiplied by the reference confirmation time to obtain a new confirmation time (step S16). The current confirmed time is updated with a new confirmed time (step S17).

  For example, when the average value of the pressing interval in the past session is 400 msec and the average value of the pressing interval in the current session is 600 msec, the ratio is 1.5 times. If the reference determination time is 800 msec, the new determination time is 1200 msec.

  In the processing of step S13 and step S14, an average value is obtained using only the pressing intervals of different keys among the pressing intervals of the past and current sessions. Specifically, the average value is obtained using only records in which the key type 2114 of the pressing interval table 2110 is “different”. This is because different key press intervals are more likely to represent the user's situation in the session more accurately. This is because the same key press interval includes a time for the user to wait for a fixed time for the automatic cursor function to operate, and thus the user cannot simply determine the interval at which the key is pressed. Specifically, the press interval of the same key includes the press interval when selecting a character assigned to the key, the press interval when the user waits for the operation of the automatic cursor function, and the automatic cursor regardless of the user's intention. This is because it is considered that it is difficult to obtain a simple pressing interval that represents the current situation of the user because three types of pressing intervals, that is, the pressing intervals at which the function has been activated, are included.

  Moreover, in the process of step S13 and step S14, although the average value of the pressing interval of the past and the present session is calculated | required, it may not be an average value. For example, a mean square value may be used. That is, any value can be used as long as it can compare the pressing interval of the past session with the pressing interval of the current session.

  It should be noted that not only the pressing interval of different keys but also the pressing interval of all keys may be used.

  In the above-described method for determining the fixed time, the reference fixed time or the like is calculated based on a session in which a specific session is excluded from a past session in advance, but all past sessions may be used without excluding a specific session.

  Moreover, you may use the average value of a press interval as reference | standard decision time. A fixed value, for example, 1000 msec may be used.

<Operation>
Hereinafter, the operation of the mobile phone 1000 according to the first embodiment will be described with reference to FIGS.

  FIG. 6 is a flowchart showing character input processing of the mobile phone 1000.

  A case where the user of the mobile phone 1000 inputs the mail text will be described as an example.

  When the operation unit 1020 detects a user operation such as pressing an operation key, the operation unit 1020 notifies the overall control unit 1010 of the operation.

  Receiving the notification, the overall control unit 1010 determines that the notified user operation is an instruction for mail creation, performs initial processing for mail creation, and then requests the character input control unit 1100 to perform character input processing. .

  Upon receiving the request, the character input control unit 1100 waits for the user's character input operation.

  The operation unit 1020 detects a key press (step S100).

  When the detected key is a key for performing character input processing, for example, the character input key 30 or the clear key (see FIG. 1) (step S110: character input key), the operation unit 1020 uses the detected key as the character input control unit. 1100 is notified. On the other hand, when a key other than the key for performing the character input process is detected (step S110: other key), the operation unit 1020 gives a message to that effect to the overall control unit 1010, and the given overall control unit 1010 receives the pressed key. A process corresponding to is performed (step S280), and the character input process is terminated.

  The character input control unit 1100 that has received notification that a key for performing character input processing has been pressed notifies the character display unit 1200 and the press interval detection unit 1400 that the key has been pressed. At this time, the identifier of the pressed key is also notified.

  Receiving the notification, the character display unit 1200 stores the key identifier notified from the character input control unit 1100 in the memory. In addition, the automatic cursor unit 1300 is notified that the key has been pressed.

  The automatic cursor unit 1300 that has received the notification starts measurement of the fixed time from 0 (zero) (step S120).

  The character display unit 1200 that has notified the automatic cursor unit 1300 determines whether or not the identifier of the key notified from the character input control unit 1100 is the same as the identifier of the key that was pressed last time (step S130).

  If the currently pressed key is different from the previously pressed key (step S130: different key), the character display unit 1200 determines the current display character (step S140) and assigns it to the currently pressed key. The displayed characters are displayed on the display 1030 as display characters. If the currently pressed key is the cursor key 14 that moves right (see FIG. 1), the cursor is moved to the position for inputting the next character (step S150).

  On the other hand, when the key pressed this time is the same key as the key pressed last time (step S130: the same key), the character display unit 1200 displays the next character assigned to the key on the display 1030 (step S130). S160). Specifically, the next character is displayed as the display character instead of the current display character.

  When the measurement time exceeds the fixed time stored in the fixed time storage unit 2000 (step S170: Yes), the automatic cursor unit 1300 that has started the measurement of the fixed time indicates that in the character display unit. 1200 is notified.

  Receiving the notification, the character display unit 1200 determines the display character that is pressed this time and displayed on the display 1030 (step S180), and moves the cursor to a position for inputting the next character (step S190).

  If the key press is detected (step S100) before the time measured by the automatic cursor portion 1300 exceeds the fixed time (step S170: No), the process is repeated from step 110.

  Upon receiving a notification that the key has been pressed and a notification of the identifier of the pressed key from the character input control unit 1100, the pressing interval detection unit 1400 calculates the pressing interval (step S200).

  Specifically, when receiving a notification from the character input control unit 1100 for the first time, the pressing interval detection unit 1400 starts measuring time. Next, when the notification is received, the measured time is stored as a pressing interval, and the time measurement is started from the beginning.

  Further, the press interval detection unit 1400 determines whether the calculated press interval exceeds the session boundary interval (step S210). The session boundary interval is stored in advance.

  When the calculated pressing interval exceeds the session boundary interval (step S210: Yes), the pressing interval detection unit 1400 indicates that the session has ended, the identifier of the key notified from the character input control unit 1100, and the calculated pressing interval. Is sent to the pressing interval adding unit 1500 to request addition to the pressing interval table 2110 (see FIG. 4). In addition, the reference determination time calculation unit 1600 is notified that the session has ended.

  The pressing interval adding unit 1500 requested to add generates a record to be added.

  Specifically, a number obtained by adding 1 to the number set in the session ID 2111 of the last record registered in the pressing interval table 2110 is set as the session ID 2111 of the record to be added (step S250). When there is no last record, that is, when the record to be added is the first record, the number “1” is set.

  In addition, the key identifier and the pressing interval passed from the pressing interval detection unit 1400 are set as a pressing key 2112 and a pressing interval 2113, respectively. Since the record to be added is the first record of the session, “-” is set as the key type 2114.

  The pressing interval adding unit 1500 that has generated the record to be added adds the generated record to the end of the pressing interval table 2110 (step S260).

  In addition, the reference confirmation time calculation unit 1600 notified from the pressing interval detection unit 1400 that the session is ended refers to the pressing interval table 2110 and is based on the information on the past sessions including the ended session. Is calculated and stored in the memory (step S270). The reference determination time calculation process will be described later with reference to FIG.

  On the other hand, when the calculated pressing interval does not exceed the session boundary interval (step S210: No), the pressing interval detection unit 1400 adds the key identifier notified from the character input control unit 1100 and the calculated pressing interval to the pressing interval. The request is sent to the section 1500 to request addition to the pressing interval table 2110.

  The pressing interval adding unit 1500 requested to add generates a record to be added.

  The generation of the record to be added is the same as in step S260. However, the number set in the session ID 2111 of the last record registered in the pressing interval table 2110 is set as the session ID 2111 of the record to be added. If the key identifier set in the press key 2112 is the same as the key identifier set in the press key 2112 of the last record registered in the press interval table 2110, “same” is set as the key type 2114. Set it, and if it is different, set “different”.

  The pressing interval adding unit 1500 that has generated the record to be added adds the generated record to the end of the pressing interval table 2110 (step S220).

  When the added record is the fifth record in the current session, the pressing interval adding unit 1500 that has added the record requests the fixed time calculating unit 1800 to calculate a new fixed time. That is, each time the pressing interval in the current session is obtained five times, a new fixed time is calculated.

  Upon receiving the request, the confirmed time calculation unit 1800 calculates a new confirmed time and updates the confirmed time (step S240). The process of calculating and updating the new fixed time will be described later with reference to FIG.

  FIG. 7 is a flowchart of a process for calculating the reference determination time.

  This process is performed by the pressing interval average calculation unit 1700. In addition, this process is an example of a method for obtaining the reference fixed time in the <method for determining fixed time> described with reference to FIG.

  First, an average pressing interval that is an average value of the pressing intervals 2113 is calculated for each past session in the pressing interval table 2110 stored in the pressing interval storage unit 2100 (step S300).

  An average μ and an average deviation σ of the average pressing interval of the session set are calculated. Only sessions whose average pressing interval of each session is in the range of μ ± Nσ with respect to a predetermined constant value N are extracted (step S310).

  Among the extracted sessions, a predetermined quantile value of the pressing interval 2113 of the record whose key type 2114 is “same”, for example, a value that is 75 percent quantile is obtained as a reference confirmation time (step S320).

  FIG. 8 is a flowchart of the new confirmation time calculation and update process.

  This process is a process performed by the fixed time calculation unit 1800. In addition, this process is an example of how to determine and update a new determined time in <How to determine determined time> described with reference to FIG.

  First, the fixed time calculation unit 1800 verifies whether it is meaningful to obtain and update a new fixed time. This is because there is no need to calculate a new fixed time if there is no significance to update.

  The fixed time calculation unit 1800 refers to the press interval table 2110 stored in the press interval storage unit 2100 and extracts the different key press interval of the current session (step S410).

  Specifically, among the records set in the session ID 2111 of the last record registered in the pressing interval table 2110, that is, the record having the same session ID and session ID 2111, the key type 2114 is “different”. ”Is extracted.

  Next, the different key press interval of the past session is extracted (step S420).

  Specifically, the pressing interval 2113 of the record whose key type 2114 is “different” is extracted from the records having the session ID 2111 smaller than the session ID of the current session. Note that the target session is the session extracted in the process of step S310 in FIG.

  The fixed time calculation unit 1800 tests the extracted set of different key press intervals of the current session and the set of different key press intervals of the past session by the Wilcoxon test (step S430).

  If there is a predetermined significant difference, a new fixed time is obtained. For example, if it is 5% significant (step S440: Yes), a new fixed time is obtained. If there is no significant difference (step S440: No), the process ends.

  When it is 5% significant (step S440: Yes), the fixed time calculation unit 1800 requests the average value of the press interval between the past session and the current session to the press interval average calculation unit 1700.

  Upon receiving the request, the average pressing interval calculation unit 1700 refers to the pressing interval table 2110 and calculates the average value of the pressing intervals of the past session and the average value of the pressing intervals of the current session (step S450). .

  Specifically, among the records set in the session ID 2111 of the last record registered in the pressing interval table 2110, that is, the record having the same session ID and session ID 2111, the key type 2114 is “different”. Is calculated as the average value of the pressing intervals of the current session. Moreover, the average of the pressing intervals 2113 of the records having the key type 2114 of “different” among the records having the session ID 2111 smaller than the session ID of the current session is calculated as the average value of the pressing intervals of the past sessions. Note that the target session is the session extracted in the process of step S310 in FIG.

  The average pressing interval calculation unit 1700 that has calculated each average value passes the calculated average value of the past session and the average value of the current session to the fixed time calculation unit 1800.

  The fixed time calculation unit 1800 that has received the average value requests the reference fixed time calculation unit 1600 for the reference fixed time. Receiving the request, the reference determination time calculation unit 1600 reads the stored reference determination time and passes it to the determination time calculation unit 1800.

  The fixed time calculation unit 1800 that has received the reference fixed time obtains the ratio of the average value of the current session to the average value of the past session (step S460).

The fixed time calculation unit 1800 multiplies the determined ratio by the reference fixed time to obtain a new fixed time (step S470), and updates the current fixed time stored in the fixed time storage unit 2000 with the new fixed time. (Step S480).
<Embodiment 2>
In the first embodiment, the fixed time is obtained by correcting the average time of the past key pressing intervals based on the current key pressing interval representing the current user status.

  In the second embodiment, the determination time is determined in consideration of erroneous determination. “Incorrect confirmation” refers to confirmation of characters that are not scheduled by the user. This is caused by the confirmation time being too short for the current user's key press interval, causing the automatic cursor function to operate unexpectedly.

  A simple key press interval is shorter than a fixed time. Therefore, when a character input operation is performed so that the automatic cursor function does not operate so much, the average value of the pressing intervals approaches a simple key pressing interval. In other words, when the average of the press intervals is set as the fixed time, there is a problem that there is a high possibility that erroneous determination frequently occurs.

  In the second embodiment, a pressing interval (hereinafter referred to as “squeezed pressing interval”) that increases the probability of erroneous determination is obtained, and a new determined time is obtained based on a comparison between the pressing interval of the current session and the distinct pressing interval. .

  Hereinafter, a mobile phone will be described as an example of the character input device according to the second embodiment.

  The appearance of the mobile phone according to the second embodiment is the same as the appearance of the mobile phone according to the first embodiment described with reference to FIG.

<Error confirmation method>
With reference to FIG. 9, a determination method of erroneous determination will be described.

  FIG. 9 is a time chart showing an example of an erroneous determination pattern. 9 is the same as FIG.

  A case where the user performs an operation to input “se” will be described as an example.

  The user continuously presses the key “3” four times to display the display character “SE” on the character input screen 1005.

  In FIG. 9, first, the key “3” is continuously pressed three times, and the display character “su” is displayed on the character input screen 1005 (see transition screen 2).

  The fourth press of the key “3” is slightly delayed for some reason, for example, the train has shaken, etc., and after the third press, 1001 msec has passed with the display character “SU” being displayed. Sometimes made.

  In this case, when the confirmation time of 1000 msec has elapsed since the third press, the automatic cursor function is activated, the display character “su” is confirmed, and the cursor moves to the next character (transition screen 3 reference).

  Therefore, when the key “3” is pressed for the fourth time, the display character “SU” is not changed to “SE”, but the final character “SU” and the display character “SA” are displayed (transition screen). 4).

  The user presses the clear key 15 (see FIG. 1) twice to return the cursor to the first character (see the transition screen 5 and the transition screen 6). Thereafter, the key “3” is pressed to input “se”.

  That is, it can be said that an erroneously determined pattern is that the clear key 15 is pressed twice in succession and the keys pressed before and after that are the same.

  The mobile phone 1000 stores the pressed key type in association with the session ID. Therefore, the occurrence of erroneous determination can be estimated by finding the erroneous determination pattern with reference to the stored key types.

<Function>
The function of the mobile phone 3000 will be described with reference to FIG.

  FIG. 10 is a block diagram illustrating an example of a functional configuration of the mobile phone 3000.

  The cellular phone 3000 includes an overall control unit 1010, an operation unit 1020, a display 1030, a character input control unit 1100, a character display unit 1200, an automatic cursor unit 3300, a pressing interval detection unit 3400, a pressing interval addition unit 3500, and an erroneous determination detection unit 3550. , A session evaluation table creation unit 3600, a press interval average calculation unit 3700, a determination time calculation unit 3800, a distinction determination time calculation unit 3900, a determination time storage unit 2000, and a press interval storage unit 4100.

  The overall control unit 1010, the operation unit 1020, the display 1030, the character input control unit 1100, the character display unit 1200, and the fixed time storage unit 2000 are the overall control unit 1010 and the operation unit of the mobile phone 1000 (see FIG. 3) according to the first embodiment. 1020, display 1030, character input control unit 1100, character display unit 1200, and fixed time storage unit 2000 have the same functions.

  The automatic cursor portion 3300 has a function of notifying the character display portion 1200 of the fact that when the determined time is exceeded while the display character is still displayed. In addition, the pressing interval detection unit 3400 is notified of that, that is, that the automatic cursor function has been activated. The automatic cursor unit 3300 has substantially the same function as the automatic cursor unit 1300 of the mobile phone 1000 according to the first embodiment, but is different in that it notifies the pressing interval detection unit 3400 that the automatic cursor function has been activated.

  The pressing interval detection unit 3400 has a function of measuring a key pressing interval. The measured pressing interval is notified to the pressing interval adding unit 3500. Further, when the pressing interval exceeds the session boundary time, the pressing interval adding unit 3500 and the session evaluation table creating unit 3600 are notified that the session has ended.

  The pressing interval adding unit 3500 has a function of adding a record to the pressing interval table stored in the pressing interval storage unit 4100. The pressing interval adding unit 3500 has substantially the same function as the pressing interval adding unit 1500 of the mobile phone 1000 of Embodiment 1, but the configuration of the record to be generated is different. The pressing interval table will be described in the section <Data>.

  The error determination detection unit 3550 searches for an error determination pattern from the pressing interval table stored in the pressing interval storage unit 4100.

  The session evaluation table creation unit 3600 has a function of creating a session evaluation table by referring to the press interval table stored in the press interval storage unit 4100. The session evaluation table will be described in the section <Data>.

  The press interval average calculation unit 3700 has a function of obtaining an average of press intervals of the current session. The average of pressing intervals of the current session is an average of several pressing intervals up to the present time in the middle of the session, for example, an average of five pressing intervals.

  The fixed time calculation unit 3800 has a function of obtaining a fixed time in the current session.

  The distinction confirmation time calculation unit 3900 has a function of obtaining a distinction pressing interval that is a pressing interval that increases the probability of erroneous confirmation based on the session evaluation table.

  The press interval storage unit 4100 has a function of storing a press interval table.

  All or some of the functions described above are realized by the CPU of the mobile phone 3000 executing a program recorded in the memory or the like of the mobile phone 3000.

<Data>
Next, data used in the cellular phone 3000 according to the second embodiment will be described with reference to FIGS. The data described with reference to FIG. 11 is data stored in the press interval storage unit 4100. Data described with reference to FIG. 12 is data generated by the session evaluation table creation unit 3600 and passed to the distinct distinction time calculation unit 3900.

  FIG. 11 is a diagram showing an example of the configuration and contents of the pressing interval table 4110.

  One record is added to the pressing interval table 4110 every time a key is pressed by the user.

  The pressing interval table 4110 includes a session ID 4111, a pressing key 4112, a pressing interval 4113, a key type 4114, an automatic cursor 4115, and an erroneous decision 3616.

  The session ID 4111, the pressed key 4112, the pressed interval 4113, and the key type 2114 are the same as the session ID 2111, the pressed key 2112, the pressed interval 2113, and the key type 2114 of the pressed interval table 2110 of the first embodiment described with reference to FIG. Show things.

  The automatic cursor 4115 indicates whether or not the automatic cursor function has been activated before the key indicated by the press key 4112 is pressed. “Yes” indicates that the automatic cursor function is activated, and “−” indicates that the automatic cursor function is not activated.

  The erroneous confirmation 3616 indicates whether or not the confirmation due to the operation of the automatic cursor function in which the automatic cursor 4115 is indicated as “present” is an erroneous confirmation. “Incorrect” indicates that the data is erroneously determined, and “correct” indicates that the data is correct but not erroneously determined.

  FIG. 12 is a diagram illustrating an example of the configuration and contents of the session evaluation table 3610.

  One record is added to the session evaluation table 3610 every time a session is terminated.

  The session evaluation table 3610 includes a session ID 3611, an automatic cursor operation count 3612, an erroneous determination count 3613, and a press interval average 3614.

  The session ID 3611 is a session identifier.

  The automatic cursor operation count 3612 indicates the number of times that the automatic cursor function has been operated during the session indicated by the session ID 3611.

  The number of erroneous determinations 3613 indicates the number of erroneous determinations estimated to have occurred among the number of operations indicated by the automatic cursor operation number of times 3612.

  An average pressing interval 3614 indicates an average value of the pressing interval of the key in the session indicated by the session ID 3611. This average pressing interval 3614 is an example of a statistical amount of pressing intervals, and in the second embodiment, is an average value of pressing intervals of different keys.

  This is because different key press intervals are more likely to represent the user's situation in the session more accurately.

  It should be noted that not only the pressing interval of different keys but also the pressing interval of all keys may be used.

<How to determine the fixed time>
Here, how to obtain the fixed time in the character input process of the cellular phone 3000 according to the second embodiment will be described with reference to FIGS.

  FIG. 13 is a diagram illustrating an example of a procedure for calculating the fixed time. FIG. 14 is a diagram illustrating an analysis example of a session group using a decision tree.

  First, a session evaluation table 3610 (see FIG. 12) is created from past session data in the pressing interval table 4110 stored in the pressing interval storage unit 4100 (step S20). In this case, the pressing interval table 4110 is generated with the fixed time being a constant value, for example, 1000 msec.

  Next, by using a decision tree technique which is an example of a statistical technique, a pressing interval with a high probability of erroneous determination is obtained (see step S21 in FIG. 13 and the decision tree shown in the upper part of FIG. 14).

  First, the sessions are classified using the average value of the pressing intervals indicated by the pressing interval average 3614 and the probability of erroneous determination obtained from the automatic cursor operation count 3612 and the erroneous determination count 3613.

  A pressing interval at a boundary where a large difference occurs in the probability of occurrence of erroneous determination is defined as a sharp pressing interval. In the decision tree of FIG. 14, there is a large difference in the occurrence rate of erroneous determination between a session group with an average pressing interval of 400 msec or less and other groups. Therefore, in this case, the distinction pressing interval is set to 400 msec.

  Next, a fixed time is determined based on the determined distinction pressing interval. In the second embodiment, the fixed time is calculated by one of the following two methods.

  The first method calculates the average of the pressing interval of the current session, and when the average exceeds the sharp pressing interval, a predetermined constant multiple of the current fixed time, for example, a value of 1.2 times Is defined time.

  The second method obtains the distribution of the same key press intervals for each classification obtained by the decision tree, and sets the session group classified as having the lowest probability of erroneous determination obtained by the decision tree as the reference session. As a group, a determination time is obtained for each classification such that the erroneous determination occurrence rate of each group does not exceed the reference session group (see the graph shown at the bottom of FIG. 14).

  For example, in the graph on the right, the horizontal axis represents the pressing interval, and the vertical axis represents the relative cumulative frequency of the pressing interval 4113 of the same key of the session group indicated by the session ID 3611 whose average pressing interval 3614 is 400 msec or less. is there.

  In the left graph, the horizontal axis represents the pressing interval, and the vertical axis represents the relative cumulative frequency of the pressing interval 4113 of the same key of the session group indicated by the session ID 3611 whose average pressing interval 3614 is greater than 400 msec and equal to or less than 700 msec. It is.

  In the graph on the right, since the relative cumulative frequency is “90%” when the pressing interval is the reference fixed time, that is, 1000 msec, the erroneous determination rate is estimated to be “10%” at the maximum. The reference determination time is the same as the reference determination time described in FIG. 5 of the first embodiment.

  In the graph on the left, the relative cumulative frequency when the pressing interval is 1000 msec is “38%”. Here, the pressing interval at which the relative cumulative frequency becomes “90%” is calculated so that the error determination rate is suppressed to “10%” at the maximum (open arrow). The determined pressing interval, for example, 1250 msec is set as the fixed time.

  Next, an average value of different key press intervals of the current session is obtained (step S22), and when the obtained average value exceeds the distinct press interval, a fixed time in the corresponding classification is determined as a new fixed time ( Step S23, Step S24). The current determined time is updated with the determined new determined time (steps S25 and S26).

  For example, when the average value of the pressing interval of the current session is 400 msec or less, the fixed time is set to 1000 msec, and when the average value of the pressing interval of the current session exceeds 400 msec, the fixed time is set to 1250 sec.

<Operation>
Hereinafter, the operation of the mobile phone 3000 according to the second embodiment will be described with reference to FIGS. 15 and 16.

  FIG. 15 is a flowchart showing the character input process of the mobile phone 3000.

  Here, the description will focus on differences from the character input processing of the mobile phone 1000 of the first embodiment described with reference to FIG. In the flowcharts of FIGS. 15 and 6, processes having the same step number are similar processes.

  15 is different from the flowchart processing of FIG. 6 in the processing of step S510, step S520, step S530, and step S540.

  Hereinafter, the character input process of the mobile phone 3000 will be described.

  When the operation unit 1020 detects pressing of a key for performing character input processing, the operation unit 1020 notifies the character input control unit 1100 of the detected key.

  Upon receiving the notification, the character input control unit 1100 notifies the character display unit 1200 and the press interval detection unit 3400 that the key has been pressed. At this time, the identifier of the pressed key is also notified.

  The character display unit 1200 that has received the notification notifies the automatic cursor unit 1300 that the key has been pressed, and the automatic cursor unit 1300 that has received the notification starts measuring the fixed time from 0 (zero) (step S120). ).

  The character display unit 1200 that has notified the automatic cursor unit 1300 performs display processing according to the pressed key (steps S130 to S160).

  When the measured time exceeds the fixed time stored in the fixed time storage unit 2000 (step S170: Yes), the automatic cursor unit 1300 notifies the character display unit 1200 to that effect.

  Receiving the notification, the character display unit 1200 performs an automatic cursor function process (steps S180 and S190).

  In addition, the automatic cursor unit 1300 notifies the pressing interval detection unit 3400 that the automatic cursor function has been activated. Upon receiving the notification, the pressing interval detection unit 3400 stores that fact in the memory (step S540).

  On the other hand, the pressing interval detection unit 3400 that has received the notification that the key has been pressed and the notification of the identifier of the pressed key from the character input control unit 1100 calculates the pressing interval (step S200).

  In addition, the pressing interval detection unit 3400 determines whether the calculated pressing interval exceeds the session boundary interval (step S210).

  When the calculated pressing interval exceeds the session boundary interval (step S210: Yes), the pressing interval detection unit 3400 indicates that the session has ended, the key identifier notified from the character input control unit 1100, and the calculated pressing interval. Is sent to the pressing interval adding unit 3500 to request addition to the pressing interval table 4110 (see FIG. 11). Further, it notifies session evaluation table creation unit 3600 that the session has ended.

  The pressing interval adding unit 3500 requested to add generates a record to be added.

  Specifically, a new session ID is set as the session ID 4111 of the record to be added (step S250). In addition, the key identifier and the pressing interval passed from the pressing interval detection unit 3400 are set as a pressing key 4112 and a pressing interval 4113, respectively. “-” Is set as the key type 4114.

  If the memory indicates that the automatic cursor function has been activated, “Yes” is set as the automatic cursor 4115 to erase that the automatic cursor function has been activated. “Correct” is set in the error confirmation 3616.

  The pressing interval adding unit 3500 that has generated the record to be added adds the generated record to the end of the pressing interval table 4110 (step S260).

  The pressing interval addition unit 3500 that has added the record requests the erroneous determination detection unit 3550 to search for erroneous determination.

  Upon receipt of the request, the erroneous determination detection unit 3550 searches for the erroneous determination pattern, and when detecting the erroneous determination pattern, rewrites “correct” in the erroneous determination 4116 of the corresponding record to “false”.

  For example, when the record with the press key 4112 of “3” is added, the four records from the end of the press interval table 4110 are “3”, “clear”, “clear”, and “3” in order. When the automatic cursor 4115 of the record “3” of the eye is “present”, the erroneous decision 3616 of the record is rewritten from “correct” to “false”.

  In addition, the session evaluation table creation unit 3600 notified from the pressing interval detection unit 3400 that the session has ended refers to the pressing interval table 4110 and based on the information on the past sessions including the ended session, the session evaluation table 3610 is generated and passed to the distinct distinction time calculation unit 3900 (step S520).

  Receiving the session evaluation table 3610, the distinction confirmation time calculation unit 3900 obtains a distinction confirmation time and a confirmation time for each classification obtained from the decision tree based on the session evaluation table 3610.

  On the other hand, if the calculated pressing interval does not exceed the session boundary interval (step S210: No), the pressing interval detection unit 3400 adds the key identifier notified from the character input control unit 1100 and the calculated pressing interval to the pressing interval. The request is sent to the section 3500 and requested to be added to the pressing interval table 4110.

  The pressing interval adding unit 3500 requested to add generates a record to be added.

  The generation of the record to be added is the same as in step S260. However, the current session ID is set as the session ID 2111 of the record to be added. If the key identifier set in the press key 4112 is the same as the key identifier set in the press key 4112 of the last record registered in the press interval table 4110, “same” is set as the key type 4114. Set it, and if it is different, set “different”.

  The pressing interval adding unit 3500 that has generated the record to be added adds the generated record to the end of the pressing interval table 4110 (step S220).

  In addition, the pressing interval adding unit 3500 to which the record has been added requests the erroneous determination detection unit 3550 to search for an erroneous determination, and the erroneous determination detection unit 3550 that has received the request searches for an erroneous determination pattern and detects the erroneous determination pattern. In such a case, “correct” in the erroneous confirmation 4116 of the corresponding record is rewritten to “false”.

  When the added record is the fifth record in the current session (step S230: Yes), the pressing interval adding unit 3500 that has added the record requests the fixed time calculating unit 3800 to calculate a new fixed time. To do.

  The confirmed time calculation unit 3800 that has received the request calculates a new confirmed time and updates the confirmed time (step S510). Processing for calculating and updating a new fixed time will be described with reference to FIG.

  FIG. 16 is a flowchart of the process for calculating and updating the new confirmation time.

  This process is a process performed by the fixed time calculation unit 3800. Further, this process is an example of how to determine and update a new fixed time out of the <how to determine fixed time> described with reference to FIG.

  First, the confirmation time calculation unit 3800 uses the decision tree prescription based on the session evaluation table 3610 to obtain a pressing interval with a high probability of erroneous confirmation as the distinction confirmation time (see the decision tree in FIG. 14). Classification is performed using the average value of the pressing intervals indicated by the pressing interval average 3614 and the probability of erroneous determination obtained from the automatic cursor operation count 3612 and the erroneous determination count 3613.

  For each classification obtained from the decision tree, the distribution of the same key press intervals is obtained (step S600).

  A determination time is determined so that the error determination occurrence rates of the groups are the same (step S610).

  The fixed time calculation unit 3800 requests the average value of the pressing interval of the current session from the pressing interval average calculation unit 3700.

  Upon receiving the request, the average pressing interval calculation unit 3700 refers to the pressing interval table 4110 and calculates the average value of the pressing intervals of the current session (step S620).

  Specifically, among the records set in the session ID 2111 of the last record registered in the pressing interval table 2110, that is, the record having the same session ID and session ID 2111, the key type 2114 is “different”. Is calculated as the average value of the pressing intervals of the current session.

  The pressing interval average calculation unit 3700 that has calculated the average value passes the calculated average value of the current session to the fixed time calculation unit 3800.

  Receiving the average value, the fixed time calculation unit 3800 obtains a fixed time in the classification according to the passed average value as a new fixed time, and updates the current fixed time (step S630).

<Supplement>
As mentioned above, although embodiment of this invention was described, this invention may be as follows not only the said form.
(1) In the embodiment, a mobile phone has been described as an example of a character input device, but other devices may be used. Not only a portable device but also a stationary device may be used.
(2) In the mobile phone 1000 or the like, all or a part of the components shown in FIG. 3 or the like may be realized by an integrated circuit of one chip or a plurality of chips.
(3) The mobile phone 1000 or the like may be realized by all or part of the components shown in FIG. 3 or the like by a computer program, or may be implemented in any other form.

  In the case of a computer program, a program written on any recording medium such as a memory card or CD-ROM may be read and executed by a computer, or a program may be downloaded and executed via a network. Also good.

10 software compatible keys 20 function keys 30 character input keys 1000 3000 mobile phone 1004 display 1010 control unit 1020 operation unit 1030 display 1100 character input control unit 1200 character display unit 1300 3300 automatic cursor unit 1400 3400 press interval detection unit 1500 3500 press interval Additional unit 1600 Reference determination time calculation unit 1700 3700 Press interval average calculation unit 1800 3800 Determination time calculation unit 2000 Determination time storage unit 2100 4100 Press interval storage unit 2110 4110 Press interval table 3550 Error determination detection unit 3600 Session evaluation table creation unit 3610 Session Evaluation table 3900 Strictly determined time calculation unit

Claims (15)

A plurality of keys each assigned a plurality of characters, and
When a key press is detected, one of the characters assigned to the key is selected, and the selected character is displayed when a predetermined time, which is a predetermined time, has elapsed since the detection. A character confirmation means to confirm;
An acquisition means for acquiring a press interval that is a time from when a key press is detected until the next key press is detected;
A pressing interval storage means for storing the acquired pressing interval;
Using a ratio between a value obtained based on a plurality of previous pressing intervals and a value obtained on the basis of the pressing intervals stored in the pressing interval storage means including the pressing intervals other than the plurality of previous pressing intervals. A character input device comprising: a fixed time update means for updating the fixed time with the obtained value. The pressing interval storage means includes a session identifier indicating a session that is a time zone separated by a position where a pressing interval exceeding a preset session boundary time is acquired so as to be longer than the fixed time; Stores the detected key press intervals in the session in association with each other.
The ratio in the fixed time update means is stored in association with a value obtained based on a pressing interval stored in association with a session identifier indicating the current session and a session identifier indicating a past session. The character input device according to claim 1, wherein the ratio is a ratio with a value obtained based on a pressing interval. The fixed time update means is a reference fixed time that is a value of a predetermined constant multiple of the average value of the press intervals stored in the press interval storage means, or a predetermined quantile value of the stored press intervals. The character input device according to claim 1, wherein the fixed time is updated with a value corrected according to the ratio. The reference determination time is a value obtained by using a pressing interval within a predetermined range based on an average value of the pressing intervals among pressing intervals stored in the pressing interval storage unit. 3. The character input device according to 3. 2. The pressing interval used when the fixed time update means obtains the value based on the pressing interval is a pressing interval when the pressed key is different from the key pressed most recently. Or the character input device of Claim 2. The fixed time update means is configured such that a pressing interval stored in association with a session identifier indicating a current session has a certain significant difference compared to a pressing interval stored in association with a session identifier indicating a past session. The character input device according to claim 2, wherein the fixed time is updated only when there is a character. The character input device according to claim 1, wherein the value obtained based on the pressing interval is an average value of the pressing intervals. A plurality of keys each assigned a plurality of characters, and
When a key press is detected, one of the characters assigned to the key is selected, and the selected character is displayed when a predetermined time, which is a predetermined time, has elapsed since the detection. A character confirmation means to confirm;
An acquisition means for acquiring a press interval that is a time from when a key press is detected until the next key press is detected;
A pressing interval storage means for storing the acquired pressing interval;
An erroneous confirmation determination means for determining that the confirmation of the character made by the character confirmation means is incorrect;
Key presses based on the press intervals stored in the press interval storage means, the number of character determinations performed by the character determination means, and the number of determinations determined to be wrong by the erroneous determination determination means A distinction press interval calculation means for obtaining a distinction press interval, which is a value related to and a probability that an erroneous decision occurs is a value that changes before and after the value;
A character input device comprising: fixed time update means for updating the fixed time when a value obtained based on a plurality of immediately preceding press intervals exceeds the distinct press interval. The pressing interval used when the distinctive pressing interval calculation means obtains the distinct pressing interval based on the pressing interval is a pressing interval when the pressed key is different from the key pressed most recently. The character input device according to claim 8. The distinction pressing interval calculation means includes the pressing interval stored in the pressing interval storage means, the number of character determinations performed by the character determination means, and the number of determinations determined to be erroneous by the erroneous determination determination means. The character input device according to claim 8, wherein a steep distinct press interval is obtained using a decision tree as a statistical technique based on the above. When the value obtained based on a plurality of immediately preceding pressing intervals exceeds the distinct pressing interval, the determination time updating unit makes an error in the erroneous determination determining unit with respect to the number of character determinations performed by the character determining unit. The character input device according to claim 8, wherein the determination time is updated with a determination time such that a ratio of the number of determinations determined to have been substantially unchanged. When a plurality of keys to which a plurality of characters are assigned and a key press is detected, one of the characters assigned to the key is selected, and the elapsed time from the detection is a predetermined time A character input device having a character confirmation means for confirming a selected character when a certain confirmation time has elapsed, an update method for updating the confirmation time,
Get the press interval, which is the time from when the key press is detected until the next key press is detected,
Store the acquired press interval,
The value obtained using a ratio of a value obtained based on a plurality of immediately preceding pressing intervals and a value obtained based on a stored pressing interval including a pressing interval other than the plurality of immediately preceding pressing intervals, and confirming Update method to update the time. When a plurality of keys to which a plurality of characters are assigned and a key press is detected, one of the characters assigned to the key is selected, and the elapsed time from the detection is a predetermined time A computer program for causing a character input device having a character confirmation means to confirm a selected character when a certain confirmation time has passed, to update the confirmation time,
Execute the acquisition process to acquire the press interval, which is the time from when the key press is detected until the next key press is detected,
Execute the press interval storage process to store the acquired press interval,
Obtained using a ratio between a value obtained based on a plurality of previous press intervals and a value obtained on the basis of the press interval stored in the press interval storing process including the press intervals other than the previous press intervals. A computer program for executing a fixed time update process for updating the fixed time with a determined value. When a plurality of keys to which a plurality of characters are assigned and a key press is detected, one of the characters assigned to the key is selected, and the elapsed time from the detection is a predetermined time A character input device having a character confirmation means for confirming a selected character when a certain confirmation time has elapsed, an update method for updating the confirmation time,
Get the press interval, which is the time from when the key press is detected until the next key press is detected,
Store the acquired press interval,
Determine whether or not the character confirmation performed by the character confirmation means was incorrect,
Based on the stored pressing interval, the number of character determinations performed by the character determination unit, and the number of determinations determined to have been incorrect, the value regarding the key pressing and the probability of erroneous determination is Let us determine the distinctive press interval, which is a value that changes before and after the value,
An updating method for updating the determination time when a value obtained based on a plurality of immediately preceding pressing intervals exceeds the distinct pressing interval. When a plurality of keys to which a plurality of characters are assigned and a key press is detected, one of the characters assigned to the key is selected, and the elapsed time from the detection is a predetermined time A computer program for causing a character input device having a character confirmation means to confirm a selected character when a certain confirmation time has passed, to update the confirmation time,
Execute the acquisition process to acquire the press interval, which is the time from when the key press is detected until the next key press is detected,
Execute the press interval storage process to store the acquired press interval,
Causing the character confirmation means to determine whether or not the confirmation of the character is incorrect,
Based on the pressing interval stored in the pressing interval storage process, the number of character determinations performed by the character determination unit, and the number of determinations determined to have been incorrect in the erroneous determination determination process, A distinction pressing interval calculation process for obtaining a distinction pressing interval, which is a value and the probability that an erroneous determination occurs before and after the value changes,
A computer program for executing a fixed time update process for updating the fixed time when a value obtained based on a plurality of previous pressing intervals exceeds the distinct pressing interval.

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