JP4903394B2 - Character input device, character input method, and character input program - Google Patents

Description

  The present invention relates to a character input device, a character input method, and a character input program, and more particularly to a character input device and a character input method in a small portable terminal having a numeric keypad such as a mobile phone.

  2. Description of the Related Art Conventionally, it has been practiced to create a memo by inputting characters into a small portable terminal such as a mobile phone, or to create a text for mail. In general, when inputting characters, the character group is often assigned to each key of the numeric keypad and input with one hand. For example, a multi-tap method is known in which a small mobile terminal is held with a palm and a key is pressed a plurality of times with one finger such as a thumb to select characters. The multi-tap method is an input method in which characters can be input to a key for originally inputting numbers. A corresponding line is allocated for each key, and the character of `` A '' is selected with a single keystroke, and the `` I '', `` U '', `` E '', It becomes “O” stage, and after a round, it returns to the first “A” stage letter.

  By the way, a small mobile terminal tends to be formed with a small key group due to a demand for miniaturization, and there is a problem that it is difficult to use when a key is pressed a plurality of times (for example, up to five times with Kiyone kana characters). Also, in the actual text input operation, the character at the beginning of each line is first conscious of the “a” stage character, and then the key is pressed multiple times to select the desired character, so the input rhythm is poor. There was a problem of becoming.

For such character input problems, different character groups are arranged on individual tables, and this table and the numeric keypad are linked to change the coordinate value of each character in the table according to the key input. An input method is disclosed (for example, Patent Document 1).
In addition, it is configured to select a group of characters, etc. by one key input, and to select individual characters, etc. in the group by the second and subsequent key inputs, and to perform an annular operation that enables rotation etc. for selection of input characters A character input device that is provided with a key and can be operated with one hand is disclosed (for example, Patent Document 2).
JP-A-8-6694 JP 2003-150303 A

  However, the invention of Patent Document 1 has a problem that the functions provided for each key are complicated for each character, making it difficult to learn the operation. Furthermore, although the invention of Patent Document 2 enables one-handed operation, the selection of each character actually relies on (black and white) reverse display of the character on the monitor. For this reason, there are many places that are visually, and it is difficult to input characters by simply operating the fingertips.

  An object of the present invention is to perform character input at a high speed with easy operation and easy learning, less fatigue, and high speed character input.

In order to solve the above-mentioned problem, the invention according to claim 1 is a character input device for inputting characters by operating a plurality of keys, and detects an operation of a first key among the plurality of keys. A second detection for detecting an operation of the second key associated with the first key among the plurality of keys after the operation of the first key is detected by the first detection means and the first detection means; And when the operation of the second key is not detected by the second detection means within a predetermined time after the operation of the first key is detected by the first detection means. When the operation of the second key is detected by the second detecting means within the predetermined time , the sound specified by the first key is determined based on the second key. publication in Kana A first character determining means for determining the Kiyone kana characters in the same line as, after Kiyone kana characters is determined by the first character determining means, a third for detecting the operation of a third key which is adjacent to the second key If the operation of the third key is not detected by the third detecting means within a predetermined time after the clear kana character is confirmed by the detecting means and the first character confirming means, it is designated by the second key. A non-sound corresponding to the clear kana character determined by the first character determination means when the third detection means detects an operation of the third key within the predetermined time. The second character confirming means for confirming the kana character and the kana character confirmed by the first character confirming means or the kana character confirmed by the second character confirming means are input. Characterized in that it comprises an that character input means.

According to a second aspect of the present invention, in the character input device according to the first aspect, the second key is the same key as the first key among the plurality of keys or a key adjacent to the first key. It is characterized by being.

According to a third aspect of the present invention, in the character input device according to the first or second aspect , the kana characters other than the clear sound determined by the second character determining means are muffled kana characters.

The invention according to 請 Motomeko 4, the character input device according to claim 3, after the voiced kana characters is determined by the second character determining means, the operation of the fourth key adjacent to the third key The fourth detection means for detecting and the second character confirmation means confirms the kana character, and if the fourth key means does not detect the operation of the fourth key within a predetermined time, the third key When the voiced kana character designated by the key is confirmed, and the operation of the fourth key is detected by the fourth detecting means within the predetermined time, the voiced kana character confirmed by the first character confirming means And a third character determining means for determining a corresponding semi-voiced kana character.

According to a fifth aspect of the present invention, in the character input method, the step of detecting the operation of the first key among the plurality of keys operated to input the character, and after the operation of the first key is detected, A step of detecting an operation of a second key associated with the first key of the plurality of keys; and an operation of the second key is detected within a predetermined time after the operation of the first key is detected. If not, the clear kana character designated by the first key is confirmed, and if the operation of the second key is detected within the predetermined time, the first key is based on the second key. detecting a step of determining the Kiyone kana characters on the same line as Kiyone kana character specified after Kiyone kana characters is determined, the operation of the third key adjacent to the second key by, Kiyone kana characters Is confirmed And after, if the operation of the third key is not detected within a predetermined time, thereby determining the Kiyone kana character specified by the second key, the operation of the third key within the predetermined time is detected A step of confirming a kana character other than the clear sound corresponding to the confirmed kiyote kana character, and inputting the kana character other than the clear sound corresponding to the confirmed kiyote kana character or the confirmed kiyote kana character It is characterized by comprising the steps of:

The invention according to claim 6 is a function for detecting an operation of a first key among a plurality of keys operated to input characters to a computer, and after detecting an operation of the first key, the plurality of keys A function for detecting an operation of a second key associated with the first key of the keys, and when an operation of the second key is not detected within a predetermined time after the operation of the first key is detected. , And confirming the kana character designated by the first key and, if an operation of the second key is detected within the predetermined time , designated by the first key based on the second key. ability to determine the Kiyone kana characters on the same line as Kiyone kana, after Kiyone kana characters is determined, the ability to detect the operation of a third key which is adjacent to the second key, after Kiyone kana characters is determined, Within the predetermined time, the third If the operation of the over is not detected, as well as confirm the Kiyone kana character specified by the second key, if the operation of the third key within the predetermined time is detected, the the determined Kiyone kana characters A character input program that realizes a function for confirming a kana character other than a clear sound corresponding to, a function for inputting the confirmed clear sound kana character, or a kana character other than the clear sound corresponding to the confirmed clear sound kana character It is characterized by.

ADVANTAGE OF THE INVENTION According to this invention, operation of character input is made easy, it is easy to learn input operation, a fatigue feeling can be reduced, and high-speed character input can be performed.

Further , according to the present invention, the distance to move the finger is shortened, and it is possible to input by sliding the finger from the previously input key to the adjacent key. For this reason, it is possible to further facilitate the character input operation, reduce fatigue, and perform high-speed character input.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 shows a mobile phone 1 to which the present invention is applied. As shown in FIG. 1, the main body 6 and the lid 2 are connected to each other by a hinge part 3. The main body 6 is provided with an operation part 4, and the lid 2 is provided with a display part 5. . 1A to 1C show a state in which the mobile phone 1 is opened, and show an inner front surface, a right side surface, and an outer rear surface, respectively.

  Next, the electronic circuit configuration of the mobile phone 1 will be described with reference to FIG. The cellular phone 1 includes a control unit 11, a wireless communication unit 12, a transmission unit 13, a reception unit 14, a display unit 15, a speaker unit 16, a key input unit 17, a power supply unit 18, a camera unit 19, and a data storage unit 20. In particular, they are configured to be electrically connected to each other by a bus (not shown).

  The control unit 11 includes a CPU (Central Processing Unit) 25, a RAM (Random Access Memory) 27, and a ROM (Read Only Memory) 26. The CPU 25 controls the overall operation of the mobile phone 1 by sending control signals to the above-described units according to various control programs stored in the ROM 26 using a predetermined area of the internal RAM 27 as a work area. The ROM 26 stores a number table, a hiragana table, a katakana table, and an alphabet table in advance.

  The number table is a code data table indicating numbers from 1 to 99. The hiragana table will be described later, but in addition to the hiragana characters in the syllabary of 50 syllables, the phonetic characters (“ga line”, “baku”, etc.), the semi-voiced characters (“pa line”), the lower case letters of the prompt characters (“tsu”) It is a code data table indicating characters including symbols such as lowercase letters and punctuation marks of stuttering characters (“nya”, “yu”, “yo”, “i”, etc.). The katakana table is a code data table that indicates various characters in katakana as in the hiragana table. The alphabet table is a code data table indicating upper and lower case letters and symbols of the alphabet.

  In the three character tables, code data corresponding to these characters can be specified and read by XY coordinate data (X = 0 to 9, Y = 0 to 9) by pressing a numeric keyboard and an additional keyboard described later. It has become.

  The timer unit 28 has a crystal oscillation circuit that outputs a clock signal by crystal oscillation at a constant frequency at all times, and a timer circuit that counts the clock signal and counts the current time (none of which is shown). The date / time of the date / time / minute / second is measured and the elapsed time is measured, and the date data or time data is output.

  The wireless communication unit 12 is a circuit unit that is connected to the antenna 24 and controls driving of the antenna 24. The wireless communication unit 12 adopts a wireless communication method (for example, CDMA, PDC, Communication processing including radio signal modulation / demodulation processing and terminal authentication processing based on GSM or the like.

The transmitter 13 transmits the user's voice to the other party, converts the voice signal from the microphone 23 (see FIG. 1A) provided in the main body 6 into a voice digital signal, and performs control. To the unit 11.
The receiving unit 14 converts the received voice digital signal input from the control unit 11 into a voice analog signal and outputs the voice analog signal to the speaker unit 16 described later.

  The display unit 15 converts an image signal input from the control unit 11 by a DSP (Digital Signal Processor) (not shown) and outputs it as an image output signal to the display unit to display an image.

  The speaker unit 16 outputs music playback, a ring tone, or a voice during reception based on the audio output signal output from the control unit 11 or the reception unit 14. Note that the speaker unit 16 may include a vibrator that generates vibration by rotating the weight eccentrically with a motor, and may vibrate and notify the device when a ring tone is output according to an instruction from the control unit 11.

  The power supply unit 18 is a power supply circuit for supplying power supplied from the battery 18a. When the power supply unit 18 is connected to a commercial AC power supply (not shown), power is supplied to each unit based on the commercial AC power supply. When the battery 18a is a secondary battery, the secondary battery is charged.

  The battery 18 a is a temporary battery such as an alkaline battery or a manganese battery, or a secondary battery such as a nickel / cadmium storage battery, a nickel / hydrogen storage battery, or a lithium ion battery, and supplies power to the power supply unit 18.

  The camera unit 19 is configured by an optical lens, an image sensor, and the like that are not particularly illustrated. The camera unit 19 outputs an image that enters the optical lens and forms an image on the image sensor to the control unit 11 according to an instruction from the control unit 11.

  The data storage unit 20 is an electrically erasable and rewritable nonvolatile memory, and includes an EEPROM (Electrically Erasable and Programmable Read-Only Memory), a flash memory, or the like. The data storage unit 20 records the system program of the mobile phone 1 according to instructions from the control unit 11, various processing programs executable on the system program, application programs, data processed by these programs, and conventional data Erase.

  The key input unit 17 includes various keys such as a numeric key, a character key, and a function key for inputting an operation instruction to the mobile phone 1, and includes an operation unit illustrated in FIGS. 1 (a) and 1 (b). Corresponding to 4. The user performs various operation instructions or settings for the cellular phone 1 by operating the key input unit 17 while referring to the screen displayed on the display unit 5.

  FIG. 3 shows an enlarged view of the operation unit 4. The operation unit 4 is provided with a keyboard unit including a numeric keyboard 30 and an additional keyboard 31. The numeric keyboard 30 includes 12 keys including keys 301 to 310 corresponding to numbers “1” to “9” and “0”, and keys 311 and 312 corresponding to “*” and “#”. These keys 301 to 312 are arranged 3 × 4 in the horizontal direction, and keys 301 to 303 are arranged from the left in the first stage, which is the uppermost part, and from the left in the second stage in the following order. Keys 304 to 306 are arranged, keys 307 to 309 are arranged from the left in the next third stage, and keys 311, 310, and 312 are arranged from the left in the fourth stage.

  Furthermore, in the order of the keys 301 to 309, each key has a kana character level, that is, “A”, “KA”, “SA”, “TA”, “NA”, “HA”, “MA”, “YA”, and “RA”. "Wa", "O", and "N" are arranged on the key 310, and the keys 311 are arranged with "", "o", and a "small (sound / promotion sound)" key to be described later. A line feed key is arranged in “#”.

  The additional keyboard 31 is located above the numeric keyboard 30. An application activation key, a mail function activation key, an abbreviated key, a Web function activation key, an on-hook key 32, an off-hook key 36, and a clear key 33 are arranged and surrounded by these keys are used for various item selection operations and the like. A selection key 34 and a determination key 35 used for various item determination operations are arranged at the center of the selection key 34.

Next, character input using the hiragana table will be described in detail with reference to FIGS.
(1) Input of Kiyone First, input of Kiyone kana characters will be described.
FIG. 4 is a diagram illustrating the order of keystrokes (input) of kana characters and the numeric keyboard 30 for inputting hiragana 50 kana characters. The input characters and the numeric keyboard 30 (keys 301 to 301 to be operated) are illustrated. 312) shows the keying sequence. That is, when inputting the Kiyana kana character “A”, only the key 301 is operated. On the other hand, when inputting the Kiyana kana character “I”, the key 301 is operated twice within a predetermined time. Further, when inputting the Kyane kana character “U”, the key 301 is operated at the first keystroke, and then the key 302 is confirmed by “shifting and pressing” the key 302 within a predetermined time at the second keystroke.
Note that “shifting pressing” is an operation of inputting one character by successively pressing two different numeric keys.

(2) Input of muffled sound FIG. 5 is a diagram illustrating the order of keystrokes of each kana character and the numeric keyboard 30 for inputting the hiragana kana characters of 50 hiragana characters. The keys 301 to 312) and the keying sequence of the on-hook key 32, the off-hook key 36, and the clear key 33 are shown. The difference from the Kiyane kana character is that it is confirmed by operating the key above the key that was last operated within a predetermined time in addition to the operation of inputting the Kiyone kana character. For example, when inputting the murky kana character “ga”, the key 302 is operated and then the clear key 33 on the key 302 is set to 2 within a predetermined time after the operation of the key kana character “ka”. Confirm by pressing the key as the keystroke. On the other hand, when inputting the voiced kana character “gi”, after the key 302 is operated twice within a predetermined period of time as in the case of the operation of the kiyote kana character “ki”, the key 302 is moved within the predetermined time. The clear key 33 is fixed by shifting and pressing the third key as the third keystroke. Also, when inputting the voiced kana character “gu”, the key 302 is operated for the first keystroke, and then the key 301 or 303 is pressed for the predetermined time for the second keystroke in the same manner as the operation of the voiced kana character “ku”. If the key 301 is operated within a predetermined time, the on-hook key 32 on the key 301 is operated. If the key 303 is operated, the off-hook key 36 on the key 303 is pressed for the third time. Confirm by moving and pushing. In addition, when inputting the voiced kana character “G”, the key 302 is operated for the first keystroke, and then the key 304 or 306 is pressed for the predetermined time for the second keystroke in the same manner as the operation of the voiced kana character “K”. If the key 304 is operated within a predetermined time, the key 301 above the key 304 is shifted, and if the key 306 is operated, the key 303 above the key 304 is shifted as the third key. Confirm by pressing.

(3) Input of semi-voiced sound FIG. 6 (a) is a diagram showing the input sequence of kana characters and the keystroke sequence of the numeric keyboard 30 for the input of 50-spoken Hiragana characters. The key sequence of the power ten keyboard 30 (keys 301 to 312), the off-hook key 36, and the clear key 33 is shown. The difference from the above-mentioned muffled kana character is determined by operating the key above the last operated key within a predetermined time in addition to the operation of inputting the muffled kana character. For example, in the case of inputting the semi-spoken kana character “Pa”, the key 303 on the key 306 is set to 2 within a predetermined time after the key 306 is operated in the same manner as the operation of the kakuon kana character “BA”. Operate by pressing as a keystroke. After that, the key 33 on the key 303 is further shifted and pressed within the predetermined time as the third keystroke.

(4) Input of stuttering / promotional sound FIG. 6 (b) shows each hiragana regarding the input of 50 hiragana stuttering ("a" to "ぉ", "nya" to "yo") and prompting sound ("tsu") The drawing shows the character and the keystroke order of the numeric keyboard 30, and shows the keystroke order of the input character, the numeric keyboard 30 (keys 301 to 312) to be operated, the off-hook key 36 and the clear key 33. The difference from the Kiyone kana character is confirmed by operating the key 311 within a predetermined time in addition to the operation of inputting the Kiyone kana character. For example, when inputting the roaring kana character “A”, the key 301 is operated as the second keystroke within a predetermined time after the operation of the key 301 in the same manner as the operation of the Kiyana kana character “A”. To do. When the phonetic kana character “tsu” is input, the key 304 is operated for the first keystroke, and then the key 305 is “shifted” within a predetermined time for the second keystroke, as in the case of the kimono kana character “tsu”. The operation is performed, and then the key 311 is further determined as the third keystroke.

Next, an operation of the input method for a portable telephone applied to the present embodiment will be described with reference to the flowchart shown in FIG.

  When the character input function is activated, an input signal from the operation surface is waited (step S1).

  When the input signal transmitted by the user's numeric keypad operation is received, it is determined whether the signal is the “A” stage signal of the keys 301 to 312 (step S2). Note that “*” as the first input signal includes “′ (turbid point)”, and “#” includes “° (semi-turbid point)”.

  When the input signal is in the “A” stage, that is, “A · ka · sa · ta · ...” (step S2: YES), a time measurement start signal is transmitted to the time measurement unit 28 to measure a predetermined time. Start (step S3). That is, since the character of the “A” row of the Kiyane kana character has a single key operation, the input signal is intended for the input of the characters “A”, “K” This is to provide a threshold value for determining whether the object is a character or a character of “dan”, that is, “a, i, u, e, o…”.

  Thereafter, in order to narrow down a specific character expected from the input signal of the “A” stage, the hiragana key table shown in FIGS. 4, 5, 6A, and 6B is read from the ROM 26 and the corresponding character is read. A specific list is generated (step S4) and then waited (step S5). For example, when the user presses the key 301 once, the chord list of “A · I · U · E · O · A…” with “A” stage as the first input signal is stored on the RAM 27. And then wait.

When the second input signal is not received during the standby time of step S5 even after the predetermined time when the time measurement is started in step S3 (step S6: NO), the character “a” in the first input signal is Confirm (step S17) and return to step S1 again.
In the case where the first input signal is a dakuten or semi-dakuten, it may be configured to return to step S1 without determining the character, or may be configured not to perform discrimination within a predetermined time in step S6.

  In step S6, the second input signal is received within a predetermined time (step S6: YES), and if it is the “A” stage signal among the keys 301 to 309, 310 (step S7: YES), It is determined whether any character in the character specification list generated in step S4 matches the character specified by the first and second input signals (step S8).

  If it does not match the character identification list at this time, the first input signal is determined as the character in the “A” level of the corresponding key, and the second input signal is newly set as the first input signal and the process returns to step S3 (step S18). ).

  When it matches with the character specific list in step S8 (step S8: YES), it is determined whether the matched character is a clear sound (step S9). That is, when the first input signal is the key 308, that is, the “ya” line, or the key 301, that is, the “a” line, the matched character may be a roar.

  If it is determined in step S9 that the matching character is not a clear sound (step S9: NO), the input character is confirmed (step S19), and the process returns to the input standby state of the first input signal in step S1.

  If the matching character is a Kiyana kana character in step S9, a time measurement start signal is transmitted to the clock circuit, and time measurement for a predetermined time is started (step S10).

  Thereafter, in order to narrow down specific characters expected from the combination of the first and second input signals, the hiragana key table is read from the ROM 26 to generate a corresponding character specific list (step S11), and then waits ( Step S12). For example, if the key 302 is pressed twice, the expected specific characters are 8 types of characters “Ki, Ku, Ke, Ko” and “Gi, Gu, Ge, Go” on the RAM 27 as a character specific list. Expand and then wait.

If you in step S13 a predetermined period of time has elapsed (step S 13: No), the character for the purpose of input is determined as Kiyone kana characters of "I" stage - "you" stage (step S20). Thereafter, the input standby state for the first input signal in step 1 is entered.

Step S13 in is within the predetermined time (step S13: Yes), and if the third input signal is a signal of the "A" stage of the key 301 to 312 (step S14: Yes), generated in step S11 It is discriminated whether or not it matches the specified character identification list (step S15).

  If the list does not match the character specification list at this time, the kana character specified by the combination of the first and second input signals is determined as the input character, and the third input signal returns to step 2 as the first input signal again. (Step S21).

  On the other hand, when the list matches the character specification list in step S15 (step S15: YES), the character specified by the combination of the first, second and third input signals is determined as the input character (step S16). .

  As described above, according to the mobile phone to which the present invention is applied, it is possible to reduce the number of input operations because it is possible to input a maximum of three times per character when inputting hiragana characters, and it is preferable without fatigue even when inputting long sentences. Character input.

  In addition, since characters can be input using a combination of adjacent keys, the key arrangement is suitable for the operation characteristics of the thumb, particularly when the operation is performed with one thumb or the like.

  Furthermore, since input is performed by regularly combining adjacent keys, it is easy to learn how to input characters.

Although the mobile phone to which the present invention is applied has been described above, the present invention is not limited to the various examples described above.
Further, in the present embodiment, the case of detecting keystrokes has been described, but the present invention can also be applied to a touch panel and other key input devices other than pressing detection.

FIG. 1 (a) shows a front view in a state in which the cellular phone in the best mode for carrying out the present invention is developed. FIG. 1B shows a right side surface in a state where the cellular phone in the best mode for realizing the present invention is developed. FIG.1 (c) shows the back surface in the state which expand | deployed the mobile telephone in the best form for implement | achieving this invention. 1 is a block diagram showing an electronic circuit configuration of a mobile phone in the best mode for carrying out the present invention. It is the figure which expanded and showed the operation part of the mobile telephone in the best form for implementing this invention. In the hiragana table stored in the ROM, each kana character and the keystroke order of the numeric keyboard 30 are shown as drawings for Kiyone kana characters. In the hiragana table stored in the ROM, each kana character and the keystroke sequence of the numeric keyboard 30 are shown in the drawing for the muffled kana characters. Of the hiragana table stored in the ROM, (a) is a drawing of the kana characters and the keystroke order of the numeric keyboard 30 for the semi-voiced kana characters, and (b) is the kana characters and the tense characters for the stuttering / sounding kana characters. The keystroke sequence of the keyboard 30 is illustrated in the drawing. It is the flowchart which showed the operation | movement of the character input of the mobile telephone in the best form for implementing this invention.

Explanation of symbols

1 Mobile phone (character input device)
2 Lid unit 3 Hinge unit 4 Operation unit 5 Display unit 6 Main body unit 11 Control unit 12 Wireless communication unit 13 Transmission unit 14 Reception unit 16 Speaker unit 17 Key input unit 18 Power supply unit 18a Battery 19 Camera unit 20 Data storage unit 24 Antenna Unit 25 CPU (detection means, time measurement start means, signal output means, character determination means)
26 ROM (character storage means)
27 RAM
28 Timekeeping Department 30 Ten Keyboard (Multiple Keys)
31 Additional keyboard 32 On-hook key (multiple keys)
33 Clear key (multiple keys)
34 Select key 35 Enter key 36 Off-hook key (multiple keys)

Claims (6)

A character input device for inputting characters by operating a plurality of keys,
First detecting means for detecting an operation of a first key among the plurality of keys;
A second detection means for detecting an operation of a second key associated with the first key among the plurality of keys after the operation of the first key is detected by the first detection means;
A clear sound designated by the first key when the second key is not detected by the second detector within a predetermined time after the first key is detected by the first detector. When the kana character is confirmed and the operation of the second key is detected by the second detecting means within the predetermined time, the kana character specified by the first key based on the second key First character confirming means for confirming Kiyone kana characters on the same line;
A third detecting means for detecting an operation of a third key adjacent to the second key after the first character determining means is confirmed by the first character determining means ;
If the third key is not detected by the third detecting means within a predetermined time after the first character confirming means is confirmed by the first character confirming means, the Kiyana kana character designated by the second key. And when the operation of the third key is detected by the third detecting means within the predetermined time , a kana character other than the clear sound corresponding to the clear kana character determined by the first character determining means A second character confirmation means for confirming;
A character input device, comprising: a character input unit for inputting a kana character determined by the first character determination unit or a kana character determined by the second character determination unit. The character input device according to claim 1, wherein the second key is the same key as the first key among the plurality of keys or a key adjacent to the first key. The character input device according to claim 1 or 2, wherein the kana character other than the Kiyone that the second character determining means is determined is a voiced kana. A fourth detecting means for detecting an operation of a fourth key adjacent to the third key after the second character confirming means is confirmed by the second character determining means;
If the fourth detection means does not detect the operation of the fourth key within a predetermined time after the second character confirmation means is confirmed by the second character confirmation means, the muffled kana character designated by the third key. And when the fourth detection means detects the operation of the fourth key within the predetermined time , the semi-accurate kana character corresponding to the clear kana character determined by the first character determination means is determined. The character input device according to claim 3 , further comprising: a third character confirmation unit that performs the following. Detecting an operation of a first key among a plurality of keys operated to input characters;
Detecting an operation of a second key associated with the first key among the plurality of keys after the operation of the first key is detected;
If the operation of the second key is not detected within a predetermined time after the operation of the first key is detected, the clear kana character designated by the first key is determined and the operation is performed within the predetermined time. When an operation of the second key is detected , based on the second key, confirming a Kiyana kana character in the same line as the Kiyana kana character designated by the first key;
Detecting the operation of the third key adjacent to the second key after the Kiyana kana character is confirmed ;
If the operation of the third key is not detected within a predetermined time after the Kiyana kana character is confirmed, the Kiyana kana character designated by the second key is confirmed and the third kana character is within the predetermined time . A step of confirming a kana character other than a clear sound corresponding to the confirmed clear sound kana character when a key operation is detected;
A character input method comprising: inputting the confirmed Kiyana kana character or a kana character other than the Kiyone corresponding to the confirmed Kiyana kana character. On the computer,
A function of detecting an operation of the first key among a plurality of keys operated to input characters;
A function of detecting an operation of the second key associated with the first key among the plurality of keys after the operation of the first key is detected;
If the operation of the second key is not detected within a predetermined time after the operation of the first key is detected, the clear kana character designated by the first key is determined and the operation is performed within the predetermined time. A function for confirming a Kiyana-kana character in the same line as the Kiyomi-kana character designated by the first key based on the second key when an operation of the second key is detected ;
A function for detecting an operation of the third key adjacent to the second key after the Kiyana kana character is confirmed ;
If the operation of the third key is not detected within a predetermined time after the Kiyana kana character is confirmed, the Kiyana kana character designated by the second key is confirmed and the third kana character is within the predetermined time . A function for confirming a kana character other than a clear sound corresponding to the confirmed clear sound kana character when a key operation is detected;
The character input program which implement | achieves the function which inputs the kana character other than the kiyoshi sound corresponding to the said determined kiyote kana character or the said determined kiyote kana character.

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