JP4793553B2 - CHARACTER INPUT DEVICE, ELECTRONIC DEVICE USING THE SAME, AND CHARACTER INPUT METHOD - Google Patents

Description

  The present invention relates to a character input device, an electronic apparatus using the same, and a character input method, and more particularly to a character input method using four keys.

  Since the character input of the present portable terminal is performed using the numeric keypad, the numeric keypad must be implemented in order to input the character. On the other hand, there is an increasing demand for downsizing of mobile terminals, and it is necessary to consider including reduction of the numeric keypad, and a method capable of inputting characters with fewer input keys is required.

  For example, in a terminal such as a portable terminal where portability is important, the size and weight are one of the important factors that determine the quality of the terminal. In a mobile terminal, the number of input keys used for character input is a major factor that determines the size of the mobile terminal, and therefore, reduction of input keys is required.

For example, as a character input method using fewer input keys, for example, a character input method using a cross key and three keys (see Patent Document 1), two cursor movement instruction switches, a decision switch, and a mode switch are used. A character input method (refer to Patent Document 2), a character input method using four keys of a next key, a previous key, a confirmation key, and a backward key (refer to Patent Document 3) are also disclosed.
JP 2002-268800 A JP 2000-276280 A JP 2004-240771 A

  As described above, a character input method by further reducing the number of keys is desired for improving portability.

  An object of the present invention is to provide a character input device and method that can input characters with a smaller number of keys and contribute to the improvement of portability even though the conventional circumstances are considered. To do.

In order to achieve the above object, a character input device according to the present invention includes a display means for displaying a character input screen having a character selection screen, a conversion candidate selection screen, and a text editing screen, and is preset on the character selection screen. A character selection mode for selecting a desired character from the character selection mode, and displaying a conversion candidate set in advance on the conversion candidate selection screen for the character selected in the character selection mode. A conversion candidate selection mode for selecting a desired conversion candidate from among them, and a sentence composed of the character selected in the character selection mode or the conversion candidate selected in the conversion candidate selection mode are displayed on the sentence editing screen. and text editing mode to edit it, to switch to the character selection mode to the text editing mode, to the conversion candidate selection mode to the character selection mode A first operation key having a function of switching and moving a cursor position of the conversion candidate on the conversion candidate screen in the conversion candidate selection mode; and a character at the cursor position on the character selection screen in the character selection mode To select the character to be converted, select the conversion candidate of the character on the conversion candidate selection screen in the conversion candidate selection mode, add the selected character immediately before the cursor position on the sentence editing screen, A second operation key having a function of completing sentence editing on the sentence editing screen in the sentence editing mode; a cursor position on the character selection screen in the character selection mode; and the cursor position on the conversion candidate selection mode. Yusuke conversion cursor position on the candidate selection screen, and a function of moving the cursor position on the text editing window of the text editing mode in a predetermined direction The third operation key and the character selection mode cursor position on the character selection screen at the cursor position on the conversion candidate selection screen of the conversion candidate selection mode, and the text editing screen of the text editing mode the cursor position of the upper have a fourth operation key having a function of moving in a direction opposite to said predetermined direction, said third operation key is a press and hold operation, the text editing in the text editing mode A function of deleting a character immediately before the cursor position on the screen and moving the cursor position on the character selection screen in a predetermined direction for each predetermined character in the character selection mode; Has a function of moving the cursor position on the character selection screen for each predetermined character in a direction opposite to the predetermined direction by the long press operation in the character selection mode. Features.

In the present invention, the four operation keys may include cross keys.

  An electronic apparatus according to the present invention includes any one of the character input devices described above.

The character input method according to the present invention displays a character input screen having a character selection screen, a conversion candidate selection screen, and a text editing screen, and displays a preset character on the character selection screen in the character selection mode. In the conversion candidate selection mode, a desired character is selected from them, and the conversion candidates set in advance are displayed on the conversion candidate selection screen for the character selected in the character selection mode. A conversion candidate is selected, and in the text editing mode, the text selected from the text selection mode or the text composed of the conversion candidate selected in the conversion candidate selection mode is displayed and edited on the text editing screen. by the operation key, the text editing mode to perform switching to the character selection mode, to switch to the conversion candidate selection mode to the character selection mode, the conversion In the complementary selection mode, the cursor position of the conversion candidate on the conversion candidate screen is moved, and the character at the cursor position on the character selection screen is selected by the second operation key in the character selection mode, and the character to be converted And selecting the character conversion candidate on the conversion candidate selection screen in the conversion candidate selection mode, adding the selected character immediately before the cursor position on the sentence editing screen, and editing the sentence in the sentence editing mode. Completing the text editing on the screen, the third operation key allows the cursor position on the character selection screen in the character selection mode, the cursor position on the conversion candidate selection screen in the conversion candidate selection mode, and the the cursor position on the text editing screen text editing mode is moved in a predetermined direction, by the fourth operation key, the characters of the character selection mode Cursor position on択画surface, moving the cursor position on the conversion candidate the conversion candidate selection screen for the selected mode, and the cursor position on the text editing window of the text editing mode in a direction opposite to the predetermined direction By pressing and holding the third operation key, the character immediately before the cursor position on the sentence editing screen is deleted in the sentence editing mode, and the cursor position on the character selection screen is set to a predetermined position in the character selection mode. The cursor position on the character selection screen is moved in the direction opposite to the predetermined direction in the character selection mode by the long press operation of the fourth operation key. It is made to move to .

  According to the present invention, the number of keys can be reduced because a sentence creation process including character selection, conversion candidate selection, and sentence editing can be performed while switching between a plurality of processing modes using four operation keys. Thus, the terminal can be reduced in size and the portability of the user can be improved.

  BEST MODE FOR CARRYING OUT THE INVENTION A character input device according to the present invention, an electronic device using the same, and a best mode for carrying out a character input method will be described in detail with reference to the drawings.

  In this embodiment, in an electronic device such as a portable terminal capable of inputting characters, it is possible to input characters with only four keys such as a cross key without using an input device having a large number of keys such as a numeric keypad. is there. In the present embodiment, the text creation process is divided into three processing modes: a text editing mode, a character selection mode, and a conversion candidate selection mode. For example, completion of text editing in text editing mode, transition to character selection mode, cursor movement, cursor movement in character selection mode, determination of character selection, cursor movement in conversion candidate selection mode, text editing The display on the screen is assigned to an input device having four keys such as a cross key. As a result, it is possible to input characters using four keys, and portability can be improved.

  FIG. 1 shows an appearance of a portable terminal 1 that is an electronic device using the character input device according to the present embodiment. For example, a portable information communication terminal such as a cellular phone or a PDA (Personal Digital Assistant) can be applied to the portable terminal 1. In the example of FIG. 1, the mobile terminal 1 includes a display device 2 that displays a character input screen, and a cross key 13 that is used as an input device having four keys. The character input screen displayed by the display device 2 and the cross key 13 are provided at appropriate positions on the front side of the mobile terminal 1. In this configuration, the user can input characters using the character input screen of the display device 2 and the cross key 3.

  FIG. 2 shows a configuration example of the character input screen of the display device 2.

  The character input screen 21 shown in FIG. 2 is a screen that the user sees when inputting characters. The character input screen 21 includes three preset text creation modes, that is, a text editing mode (third processing mode), a character selection mode (first processing mode), and a conversion candidate selection mode (second processing). It is composed of a plurality of display screens used in accordance with (mode).

  Specifically, as the character input screen 21, a text editing screen (third display screen) 22 used in the text editing mode, a text creation screen 23 and a character selection screen (first screen used in the character selection mode). A display screen) 24 and a conversion candidate selection screen (second display screen) 25 used in the conversion candidate selection mode are preset.

  The text editing screen 22 is a screen for editing the text created in the character selection mode. The user can delete characters and move the cursor by looking at this screen.

  The character selection screen 24 is a screen in which characters such as kana, numbers, alphabetic characters, symbols, commands (deletion, insertion), etc., which are set in advance, are arranged in a line from the left side. The characters displayed on this screen are preset as character selection data (see later). The user looks at this screen and operates the right and left cross keys (see below) of the cross key 3 to select a desired character (character selection) and operates the upper cross key (see below). Then, the selected character is determined (selection determination).

  The text creation screen 23 displays the characters selected on the character selection screen 24. This character corresponds to “kana” to be a conversion candidate.

  The conversion candidate selection screen 25 is a screen that displays candidates converted into the kana input on the character selection screen 24. Conversion candidates displayed on this screen can be appropriately selected from preset conversion candidate data (described later) according to the input characters. The user looks at this screen and selects a conversion candidate. It should be noted that candidates as kana are also displayed as conversion candidates.

  FIG. 3 shows a configuration example of the cross key 3. The cross key 3 includes an upper cross key (second operation key) 31, a lower cross key (first operation key) 32, a left cross key (third operation key) 33, and a right cross key (fourth key). The operation key is composed of four keys 34. The functions assigned to these four keys are as follows.

(1) Function of the upper cross key 31 a) In the text editing mode, the text editing is completed.

  b) In the character selection mode, the character at the cursor position on the character selection screen 24 is selected as the character to be converted.

  c) In the conversion candidate selection mode, the conversion candidate selection decision is made, and the selected character is added immediately before the cursor position on the text editing screen 22.

(2) Functions of the lower cross key 32 a) In the text editing mode, the mode is switched to the character selection mode.

  b) In the character selection mode, the mode is switched to the conversion candidate selection mode.

  c) In the conversion candidate selection mode, the cursor position of the conversion candidate on the conversion candidate screen 25 is moved to the second column below the first column. If the second row does not exist, the cursor position is not moved.

(3) Function of Left Cross Key 33 a) In the text editing mode, the cursor position on the text editing screen 22 is moved to the left by one character. With a long press operation, the character immediately before the cursor position on the text editing screen 22 is deleted.

  b) In the character selection mode, the cursor position on the character selection screen 24 is shifted to the left by one character. By a long press operation, the cursor is moved to the first character of each consonant or character type in the “A” column on the left side of the cursor position on the character selection screen 24. As a result, even when the character to be selected is located far from the current cursor position, the cursor position can be quickly shifted.

  c) In the conversion candidate mode, the cursor position on the conversion candidate screen 25 is moved to the left side.

(4) Function of the right cross key 34 a) In the text editing mode, the cursor position is moved to the right by one character.

  b) In the character selection mode, the cursor position on the character selection screen 24 is moved to the right by one character. With a long press operation, the cursor position is shifted to the first character of each consonant or character type in the “A” column on the right side of the current cursor position on the character selection screen 24. As a result, even when the character to be selected is located far from the current cursor position, the cursor position can be quickly shifted.

  c) In the conversion candidate selection mode, the cursor position on the conversion candidate screen 25 is moved to the right by one character.

  FIG. 4 shows an internal configuration of the mobile terminal 1 having the display device 2 and the cross key 3.

  In the example of FIG. 4, the mobile terminal 1 includes a CPU 11 that performs overall control, and a memory 12 that stores programs and data executed by the CPU 11 in a predetermined storage area 12 a. In addition, the portable terminal 1 includes input I / Fs connected to four keys constituting the cross key 3, that is, the upper cross key 31, the lower cross key 32, the left cross key 33, and the right cross key 34, respectively. A (interface) 13 and a display I / F (interface) 14 connected to the display device 2 are incorporated. Both I / Fs 13 and 14 are connected to the CPU 11. In addition, the mobile terminal 1 is also equipped with a communication unit, a power supply unit, and the like that are not shown.

  Among these, the upper cross key 31, the lower cross key 32, the left cross key 33, and the right cross key 34 generate a preset operation signal (code signal) when pressed by the user, and the input I / F 13 It can be supplied to the CPU 11 via

  In this embodiment, the program and data stored in the memory 12 are displayed on the character input program 15, the character selection data 16 constituting the characters displayed on the character selection screen 24, and the conversion candidate selection screen 25. Conversion candidate data 17 constituting the conversion candidates. In addition, application software such as an operating system and a communication program may be included as necessary. The memory 12 may be physically composed of one memory or a plurality of memories.

  The function of the character input device according to the present embodiment is realized by the CPU 11 executing the character input program 15 in the memory 12 in accordance with the operation of the cross key 3. That is, when the CPU 11 inputs operation signals from the upper cross key 31, the lower cross key 32, the left cross key 33, and the right cross key 34, the character input program 15 is triggered by the input operation signal. It is executable. At this time, when the operation signal from each of the operation keys 31 to 34 is continuously input for a preset time, the CPU 11 recognizes that the operation of pressing the corresponding operation key is a long press operation.

  Here, the processing operation of the CPU 11 will be described with reference to FIGS. The flowcharts shown in FIGS. 5 to 8 are implemented in the character input program 15 and can be executed by the CPU 11.

  FIG. 5 shows processing when the upper cross key 31 is pressed. In this case, when the CPU 11 inputs an operation signal (code signal) corresponding to the pressing operation of the upper cross key 31 via the input I / F 13, the current mode is confirmed based on the operation signal (step S11). Then, the process corresponding to the confirmed current mode is executed. That is, when the current mode is the text editing mode (step S12: YES), the CPU 11 completes the text editing (step S13). If the current mode is the character selection mode (step S14: YES), the CPU 11 selects a character on the cursor and sets it as a character to be converted (step S15). Further, in the conversion candidate selection mode (step S16: YES), the CPU 11 selects and determines a conversion candidate, and adds the selected and determined character immediately before the cursor on the sentence editing screen 22 (step S17).

  FIG. 6 shows processing when the lower cross key 32 is pressed. In this case, when the CPU 11 inputs an operation signal (code signal) corresponding to the pressing operation of the lower cross key 32 via the input I / F 13, the CPU 11 confirms the current mode based on the operation signal (step S21). ), Execute processing according to the confirmed current mode.

  That is, when the current mode is the text editing mode (step S22: YES), the CPU 11 switches from the text editing mode to the character selection mode (step S23).

  If the current mode is the character selection mode (step S24: YES), the CPU 11 switches from the character selection mode to the conversion candidate selection mode (step S25).

  Further, when the current mode is the conversion candidate selection mode (step S26: YES), the CPU 11 moves the cursor position on the conversion candidate selection screen 25 to the conversion candidate in the second column below the first column (step S27). At this time, if there is no conversion candidate in the second column, the cursor position is not moved.

  FIG. 7 shows processing when the left cross key 33 is pressed. In this case, when the CPU 11 inputs an operation signal (code signal) corresponding to the pressing operation of the left cross key 33 via the input I / F 13, the current mode is confirmed based on the operation signal (step S31). Then, the process corresponding to the confirmed current mode is executed.

  In other words, when the current mode is the text editing mode (step S22: YES), the CPU 11 determines that the current operation on the text editing screen 22 is not performed by pressing the left cross key 33 (step S33: NO). The cursor position is moved to the left by one character (step S34), and if it is a long press operation (step S33: YES), the character immediately before the current cursor position on the text editing screen 22 is deleted (step S35).

  Further, when the current mode is the character selection mode (step S36: YES), the CPU 11 determines that the pressing operation of the left cross key 33 is not a long pressing operation (step S37: NO), the current on the character selection screen 24. If the cursor position (character selection position) is shifted to the left by one character (step S38), and if it is a long press operation (step S37: YES), the consonant in the “a” column on the left side of the current cursor position on the character selection screen 24 The cursor position is shifted to the first character of each character type or each character type (step S39). As a result, even when the character to be selected is at a position far from the current cursor position, the cursor position can be quickly shifted.

  Further, when the current mode is the conversion candidate mode (step S40: YES), the CPU 11 moves the current cursor position on the conversion candidate selection screen 25 to the left (step S41).

  FIG. 8 shows processing when the right cross key 34 is pressed. In this case, when the CPU 11 inputs an operation signal (code signal) corresponding to the pressing operation of the right cross key 34 via the input I / F 13, the current mode is confirmed based on the operation signal (step S51). Then, the process corresponding to the confirmed current mode is executed.

  That is, when the current mode is the text editing mode (step S52: YES), the CPU 11 moves the cursor position on the text editing screen 22 to the right of one character (step S53).

  In addition, when the current mode is the character selection mode (step S54: YES), the CPU 11 determines that the pressing operation of the right cross key 34 is not a long press operation (step S37: YES), the current mode on the character selection screen 24. If the cursor position is moved to the right by one character (step S56), and if it is a long press operation (step S55: YES), for each consonant or character type in the “a” column on the right side of the current cursor position on the character selection screen 24 The cursor position is shifted to the first character of (step S57). As a result, even when the character to be selected is at a position far from the current cursor position, the cursor position can be quickly shifted.

  Further, when the current mode is the conversion candidate selection mode (step S58: YES), the CPU 11 moves the current cursor position on the conversion candidate selection screen 25 to the right by one character (step S59).

  Next, the overall operation of the present embodiment will be described with reference to FIGS.

  9 to 11, using the mobile terminal 1, input “raining”, delete “RU”, and input with the cross key 3 until text editing is completed by “raining”. And the screen transition of the character input screen 21 displayed on the display device 2 at that time.

  First, as shown in FIG. 9, at the start of text editing, the text editing mode is entered, and the cursor moves to the head of the text editing screen 22 (a1). Next, the lower cross key 32 is pressed to move to the character selection screen 24 (a2).

  In this state, in order to input “rain”, first, the cursor is moved to “a” in order to input “a” of kana. Here, since the cursor is already on “A”, the upper cross key 31 is pressed to select a character. As a result, “A” is displayed on the text creation screen 23 (a3). Next, in order to input “me”, the right cross key 34 is pressed to move the cursor to “me” (a4). Here, since the cursor is on “Me”, the upper cross key 31 is pressed to select and decide. Then, the candidate “rain” is displayed on the conversion candidate selection screen 25 (a5).

  Next, in order to select “rain”, the lower cross key 32 is pressed to switch to the conversion candidate selection mode (a6). Since “Rain” is right next to “Ame” on the conversion candidate selection screen 25, the right cross key 34 is pressed to move the cursor to “Rain” (a7). In order to select and determine in this state, the upper cross key 31 is pressed to move “rain” to the head of the text editing screen 22 (a8).

  Next, in order to input “GA”, the lower cross key 32 is pressed to move to the character selection mode (a9). In this state, as shown in FIG. 10, the right cross key 34 is pressed several times to move the cursor to “GA” (a10). Next, when the upper cross key 31 is pressed, “ga” is displayed on the text creation screen 23 and the conversion candidate selection screen 25 (a11).

  Next, the lower cross key 32 is pressed to move to the conversion candidate selection mode (a12), and "GA" is selected with the upper cross key 31. Thereby, “ga” is added to the text editing screen 22 (a13), and the text editing mode is switched.

  Next, in order to input "fall", the lower cross key 32 is pressed to move to the character selection mode (a14). In this state, the left cross key 33 is pressed several times to move the cursor to “F” (a15), and the upper cross key 31 is pressed to display “F” on the sentence creation screen 23 (a16).

  Next, as shown in FIG. 11, in order to input “RU”, the right cross key 34 is pressed several times, the cursor is moved to “RU” (a17), and the upper cross key 31 is pressed. Then, a candidate “falling” is displayed on the conversion candidate selection screen 25 (a18).

  Next, in order to select “fall”, the lower cross key 32 is pressed to switch to the conversion candidate selection mode (a19), and the cursor is moved to “fall” (a20). Since the selection is determined, the upper cross key 31 is pressed to move “fall down” to the text editing screen 22 (a21). Next, since one character is to be deleted, the left cross key 33 is pressed long to delete one character (a22).

  Finally, the upper cross key 31 is pressed to complete character editing.

  Therefore, according to the present embodiment, it is possible to perform sentence creation processing including character selection, conversion candidate selection, and sentence editing while switching between a plurality of processing modes using four operation keys. Thus, the terminal can be reduced in size and the portability of the user can be improved.

  In this embodiment, the case where the cross key is used as an input device having four keys is described, but a key other than the cross key may be used. For example, a configuration in which four keys are individually mounted may be used. Further, even when the cross key is used, the present invention is not limited to the above-described embodiment. For example, a modified example in which the function of the upper cross key and the function of the lower cross key are reversed is possible.

  As described above, the present invention can be applied to an electronic apparatus such as a portable terminal that requires a character input device and is desired to be further downsized.

It is a figure which shows the external appearance of the portable terminal using the character input device which concerns on the Example of this invention. It is a figure explaining the character input screen of the display apparatus shown in FIG. It is a figure explaining the cross key shown in FIG. It is a block diagram which shows the internal structure of the portable terminal shown in FIG. It is a flowchart explaining the process at the time of pressing the upper cross key of the portable terminal shown in FIG. It is a flowchart explaining the process at the time of pressing down the lower cross key of the portable terminal shown in FIG. It is a flowchart explaining the process at the time of pressing the right cross key of the portable terminal shown in FIG. It is a flowchart explaining the process at the time of pressing the left cross key of the portable terminal shown in FIG. It is a figure explaining the flow of the input by a cross key in the case of inputting characters using the portable terminal shown in FIG. 1, and the screen transition of the character input screen by a display device. FIG. 10 is a diagram for explaining the continuation of FIG. 9. It is a figure explaining the continuation of FIG.

Explanation of symbols

1 mobile terminal 2 display device 3 cross key 11 CPU
12 Memory 12a Storage area 13 Input I / F
14 Display I / F
15 Character Input Program 16 Character Selection Data 17 Conversion Candidate Data 21 Character Input Screen 22 Text Editing Screen 23 Text Creation Screen 24 Character Selection Screen 25 Conversion Candidate Selection Screen 31 Upper Cross Key 32 Lower Cross Key 33 Left Cross Key 34 Right the cross key

Claims (4)

Display means for displaying a character input screen having a character selection screen, a conversion candidate selection screen, and a text editing screen;
A character selection mode for displaying a preset character on the character selection screen and selecting a desired character from the character selection mode;
A conversion candidate selection mode for displaying a conversion candidate set in advance on the conversion candidate selection screen and selecting a desired conversion candidate from among the characters selected in the character selection mode,
A sentence editing mode for displaying and editing a sentence selected from the characters selected in the character selection mode or a conversion candidate selected in the conversion candidate selection mode on the sentence editing screen;
Switch to the character selection mode in the text editing mode, switch to the conversion candidate selection mode in the character selection mode, and move the cursor position of the conversion candidate on the conversion candidate screen in the conversion candidate selection mode A first operation key having a function of
In the character selection mode, the character at the cursor position on the character selection screen is selected as a character to be converted, and the character conversion candidate is selected and selected on the conversion candidate selection screen in the conversion candidate selection mode. A second operation key having a function of adding a character immediately before the cursor position on the sentence editing screen and completing sentence editing on the sentence editing screen in the sentence editing mode;
A cursor position on the character selection screen in the character selection mode, a cursor position on the conversion candidate selection screen in the conversion candidate selection mode, and a cursor position on the sentence editing screen in the sentence editing mode are predetermined. A third operation key having a function of moving in a direction;
The cursor position on the character selection screen in the character selection mode, the cursor position on the conversion candidate selection screen in the conversion candidate selection mode, and the cursor position on the sentence editing screen in the sentence editing mode are the predetermined A fourth operation key having a function of moving in the direction opposite to the direction of
The third operation key is a long press operation to delete a character immediately before the cursor position on the sentence editing screen in the sentence editing mode, and to move the cursor position on the character selection screen to a predetermined position in the character selection mode. It further has a function to move in the direction for each predetermined character,
The fourth operation key further has a function of moving a cursor position on the character selection screen for each predetermined character in a direction opposite to the predetermined direction by the long press operation in the character selection mode. and it is Rubun character input device. The character input device according to claim 1, wherein the four operation keys include cross keys. An electronic apparatus comprising the character input apparatus according to claim 1 or 2. Display a character input screen having a character selection screen, conversion candidate selection screen, and sentence editing screen,
In the character selection mode, a preset character is displayed on the character selection screen and a desired character is selected from the displayed characters.
In the conversion candidate selection mode, for the character selected in the character selection mode, a conversion candidate set in advance on the conversion candidate selection screen is displayed, and a desired conversion candidate is selected from among them.
During the text editing mode, edit the text selected from the text selection mode or the text composed of the conversion candidates selected in the conversion candidate selection mode on the text editing screen,
The first operation key is used to switch to the character selection mode in the text editing mode, to switch to the conversion candidate selection mode in the character selection mode, and on the conversion candidate screen in the conversion candidate selection mode Move the cursor position of the conversion candidate,
A character at the cursor position on the character selection screen is selected as a character to be converted by the second operation key in the character selection mode, and the character is converted on the conversion candidate selection screen in the conversion candidate selection mode. Select a candidate, add the selected character immediately before the cursor position on the sentence editing screen, complete the sentence editing on the sentence editing screen in the sentence editing mode,
By a third operation key, a cursor position on the character selection screen in the character selection mode, a cursor position on the conversion candidate selection screen in the conversion candidate selection mode, and the sentence editing screen in the sentence editing mode Move the cursor position in the predetermined direction,
By a fourth operation key, a cursor position on the character selection screen in the character selection mode, a cursor position on the conversion candidate selection screen in the conversion candidate selection mode, and the sentence editing screen in the sentence editing mode Move the cursor position in the direction opposite to the predetermined direction,
By pressing and holding the third operation key, the character immediately before the cursor position on the sentence editing screen is deleted in the sentence editing mode, and the cursor position on the character selection screen is set to a predetermined direction in the character selection mode. To move every predetermined character,
The long press operation of the fourth operation key, features and to Rubun shaped moving the cursor position on the character selection screen on the character selection mode in the reverse direction for each predetermined character from the predetermined direction input method.

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