KR102530995B1 - Character input device implemented in software - Google Patents

Abstract

The present invention relates to a text input device implemented by software, comprising: a keypad providing unit that provides a virtual keypad implemented by arranging a plurality of input keys for consonants and vowels in a predetermined order; a candidate key determination unit determining a plurality of candidate keys associated with at least one drag input on the virtual keypad; a candidate character determination unit determining at least one candidate character generated by a combination of the plurality of candidate keys; and a text input unit for determining an input text from among the at least one candidate text and inputting the selected text to a text input window.

Description

Character input device implemented with software {CHARACTER INPUT DEVICE IMPLEMENTED IN SOFTWARE}

The present invention relates to a text input system, and more particularly, to a text input device implemented in software capable of providing text input by a multi-touch and drag function of a touch screen using the characteristics of a Korean phoneme structure.

As electronic devices are miniaturized and character input through a touch screen is utilized in various ways, a new character input method that can replace the existing input key is required. In particular, since Korean input is used much more than foreign language input, ease of use can be improved if it can be easily input.

In general, a mobile terminal such as a mobile phone, PDA, or smart phone is provided with a text input device or text input method for inputting a phone number, writing a text message, writing a memo pad, or inputting text for search.

In the case of Hangul, manufacturers' unique Hangul input methods such as Cheonjiin, Naratgeul, and QWERTY are used as character input methods. It is being used.

In addition, in the case of Korean, the consonants of a, ㄲ, b, c, ㄸ, d, ㅁ, f, ㅃ, ㅅ, ㅆ, ㅇ, ㄴ, ㅅ, ch, ㅋ, ℓ, PF, ㅎ, a, ㅐ , ㅑ, ㅒ, sh, ㅔ, ㅕ, ㅖ, ㅗ, ㅘ, ㅙ, ㅚ, ㅛ, TT, ㅝ, ㅞ, ㅟ, ㅠ, ㅡ, ㅢ, ㅣ It is possible to input Korean characters by sequentially inputting them through the keypad, but this input method may cause inconvenience to the user.

Korean Patent Publication No. 10-2006-0033275 (2006.04.19)

An embodiment of the present invention is to provide a text input device implemented in software capable of providing text input by a multi-touch and drag function of a touch screen using the characteristics of a Korean phoneme structure.

One embodiment of the present invention is to provide a character input device implemented in software capable of inputting characters according to touch and release motions of dragging and simultaneously inputting one Hangul character through multi-touch.

Among the embodiments, a text input device implemented by software includes a keypad providing unit that provides a virtual keypad implemented by arranging a plurality of input keys for consonants and vowels in a predetermined order; a candidate key determination unit determining a plurality of candidate keys associated with at least one drag input on the virtual keypad; a candidate character determination unit determining at least one candidate character generated by a combination of the plurality of candidate keys; and a text input unit for determining an input text from among the at least one candidate text and inputting the selected text to a text input window.

The keypad providing unit is formed in a size of 3 rows * 6 columns, and the consonants of 'a, c, f, ㅅ, ㅇ, ㄴ' and the vowels of 'ㅗ, TT, ㅐ, ㅔ' are placed in the upper and lower rows, respectively A two-dimensional keypad may be provided as the virtual keypad.

The candidate key determiner may determine the plurality of candidate keys based on a first touch related to the start of the drag input and a second touch related to the end of the drag input.

The candidate key determiner determines each of the first input keys adjacent to the second input keys determined based on the position of the current drag input according to the movement of the corresponding drag input based on the first input key associated with the first touch. A result that can be combined with can be displayed by overlaying the corresponding second input key.

The candidate key determiner determines the direction of movement when the candidate key associated with the first touch corresponds to the first vowel and is located on an input key of a second vowel that cannot be combined with the first vowel during the movement of the corresponding drag input. to determine a third vowel that can be combined with the first vowel and provide a combination result between the first and third vowels in advance through the text input window; When the input key of is terminated, a character according to the result of the combination may be determined as the input character.

The candidate character determination unit classifies the plurality of candidate keys into consonants and vowels, sorts them according to an input order, and then determines the at least one candidate character through a sequential combination of corresponding consonants and vowels, and the character input unit determines the at least one candidate character. Among the candidate characters of , the first completed candidate character may be determined as the input character, or the at least one candidate character may be determined as the input character according to the order of completion.

The disclosed technology may have the following effects. However, it does not mean that a specific embodiment must include all of the following effects or only the following effects, so it should not be understood that the scope of rights of the disclosed technology is limited thereby.

A text input device implemented by software according to an embodiment of the present invention can provide text input by multi-touch and drag functions of a touch screen by using the characteristics of the Hangul phoneme structure.

The character input device implemented as software according to an embodiment of the present invention can input characters according to touch and release motions of dragging, and can simultaneously input one Korean character through multi-touch, thereby increasing the efficiency of character input. can

1 is a diagram illustrating a character input system according to the present invention.
2 is a diagram explaining the system configuration of the character input device of FIG. 1;
FIG. 3 is a diagram explaining the functional configuration of the character input device of FIG. 1 .
FIG. 4 is a flowchart illustrating a text input method performed by the text input device of FIG. 1 .
5 and 6 are diagrams for explaining an embodiment of a text input method according to the present invention.

Since the description of the present invention is only an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the embodiment can be changed in various ways and can have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, the scope of the present invention should not be construed as being limited thereto.

Meanwhile, the meaning of terms described in this application should be understood as follows.

Terms such as "first" and "second" are used to distinguish one component from another, and the scope of rights should not be limited by these terms. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected to the other element, but other elements may exist in the middle. On the other hand, when an element is referred to as being “directly connected” to another element, it should be understood that no intervening elements exist. Meanwhile, other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to” should be interpreted similarly.

Expressions in the singular number should be understood to include plural expressions unless the context clearly dictates otherwise, and terms such as “comprise” or “having” refer to an embodied feature, number, step, operation, component, part, or these. It should be understood that it is intended to indicate that a combination exists, and does not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

In each step, the identification code (eg, a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, and each step clearly follows a specific order in context. Unless otherwise specified, it may occur in a different order than specified. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the reverse order.

The present invention can be implemented as computer readable code on a computer readable recording medium, and the computer readable recording medium includes all types of recording devices storing data that can be read by a computer system. . Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices. In addition, the computer-readable recording medium may be distributed to computer systems connected through a network, so that computer-readable codes may be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Terms defined in commonly used dictionaries should be interpreted as consistent with meanings in the context of the related art, and cannot be interpreted as having ideal or excessively formal meanings unless explicitly defined in the present application.

1 is a diagram illustrating a character input system according to the present invention.

Referring to FIG. 1 , a text input system 100 may include a user terminal 110 , a text input device 130 and a database 150 .

The user terminal 110 may correspond to a computing device capable of inputting text through the text input system 100 . The user terminal 110 may be implemented as a smart phone, a laptop computer, or a computer, but is not necessarily limited thereto, and may also be implemented as various devices such as a tablet PC. The user terminal 110 may be connected to the text input device 130 through a network, and a plurality of user terminals 110 may be simultaneously connected to the text input device 130 . In addition, the user terminal 110 may install and execute a dedicated program or application capable of using the text input method provided by the text input device 130 .

The text input device 130 may be implemented as a server corresponding to a computer or program capable of providing a keypad for text input and processing text input according to the present invention according to a user's touch or drag on a touch screen. The text input device 130 may be connected to the user terminal 110 through a wired network or a wireless network such as Bluetooth or WiFi, and may transmit/receive data with the user terminal 110 through the network.

Meanwhile, the text input device 130 may be implemented and operated as a physical component, but is not necessarily limited thereto, and is implemented as a logical component to a functional operation module operating in a computing device such as the user terminal 110. may apply. That is, the text input device 130 may operate as software on the user terminal 110 and may take charge of a text input function as a functional operation.

The database 150 may correspond to a storage device for storing various information necessary for the operation process of the text input device 130 . The database 150 may store data for detecting a user's input on the touch screen, and may store data related to Korean input by a combination of input keys, but is not necessarily limited thereto, and the character input device 130 In the process of processing text input through a software keyboard, collected or processed information can be stored in various forms.

2 is a diagram explaining the system configuration of the character input device of FIG. 1;

Referring to FIG. 2 , the text input device 130 may be implemented by including a processor 210 , a memory 230 , a user input/output unit 250 and a network input/output unit 270 .

The processor 210 may execute a procedure for processing each step in the process of the character input device 130 operating, and manage the memory 230 read or written throughout the process, and the memory 230 ), you can schedule the synchronization time between volatile memory and non-volatile memory. The processor 210 can control the overall operation of the character input device 130, and is electrically connected to the memory 230, the user input/output unit 250, and the network input/output unit 270 to control data flow between them. can The processor 210 may be implemented as a central processing unit (CPU) of the text input device 130 .

The memory 230 may include a secondary storage device implemented as a non-volatile memory such as a solid state drive (SSD) or a hard disk drive (HDD) and used to store all data necessary for the character input device 130, It may include a main memory implemented as a volatile memory such as RAM (Random Access Memory).

The user input/output unit 250 may include an environment for receiving user input and an environment for outputting specific information to the user. For example, the user input/output unit 250 may include an input device including an adapter such as a touch pad, a touch screen, an on-screen keyboard, or a pointing device, and an output device including an adapter such as a monitor or touch screen. In one embodiment, the user input/output unit 250 may correspond to a computing device connected through a remote connection, and in such a case, the text input device 130 may be implemented as an independent server.

The network input/output unit 270 includes an environment for connecting to an external device or system through a network, and includes, for example, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), and a VAN ( An adapter for communication such as Value Added Network) may be included.

FIG. 3 is a diagram explaining the functional configuration of the character input device of FIG. 1 .

Referring to FIG. 3 , the character input device 130 may include a keypad providing unit 310, a candidate key determining unit 330, a candidate character determining unit 350, a character input unit 370, and a control unit 390. there is.

The keypad providing unit 310 may provide a virtual keypad implemented by arranging a plurality of input keys for consonants and vowels in a predetermined order. The virtual keypad may be implemented in the form of a keypad for character input on a touch screen. For example, the virtual keypad may be implemented as a Korean double keyboard or a Google single vowel keyboard. The keypad providing unit 310 may change the arrangement of consonants or vowels constituting the virtual keypad as needed.

In one embodiment, the keypad providing unit 310 is formed in a size of 3 rows * 6 columns, consonants of 'a, c, f, s, ㅇ, ja' and vowels of 'ㅗ, TT, ㅐ, ㅔ' 2D keypads disposed on upper and lower rows of the 2D keypad, respectively, may be provided as virtual keypads. The keypad providing unit 310 may generate a virtual keypad using a predetermined key arrangement so that text input can be more easily combined with a multi-touch function, which will be described in more detail with reference to FIG. 5 .

The candidate key determination unit 330 may determine a plurality of candidate keys associated with at least one drag input on the virtual keypad. That is, when the user touches several input keys on the virtual keypad through a drag input, the candidate key determiner 330 may determine the corresponding input keys as a plurality of candidate keys. Here, the candidate keys are input keys simultaneously input by the user and may correspond to input keys that may be used to complete one character. The user can selectively input one drag at a time, and in this case, input keys related to the drag input on the virtual keypad from the first touch to the last touch of the drag input may be determined as candidate keys. If the user simultaneously inputs several touch and drag inputs, all input keys related to the plurality of drag inputs may be determined as candidate keys.

In an embodiment, the candidate key determiner 330 may determine a plurality of candidate keys based on a first touch related to the start of the drag input and a second touch related to the end of the drag input. That is, when the user touches a specific point, moves a predetermined distance on the touch screen while maintaining the touch, and then ends the touch, when the first touch is determined as the first touch and finally the touch ends on the touch screen. A touch of may be determined as a second touch. When a user's first touch is detected, the candidate key determiner 330 can track the movement of the corresponding touch, determine input keys on the virtual keypad associated with the corresponding touch, and input keys collected until the touch ends. can be determined as a candidate key. Then, these candidate keys can be used to determine the character the user wants to input.

In an embodiment, the candidate key determiner 330 determines the location of the current drag input based on the movement of the corresponding drag input based on the first input key associated with the first touch, for neighboring second input keys. Results that can be combined with each first input key may be displayed by overlaying the corresponding second input key. The character input device 130 may display in real time through the character input window if there is a character completed through a combination of candidate keys while the drag input continues, and the candidate key determiner 330 is the user's drag input. During this process, when the drag input moves to the corresponding position of the input keys around the current position of the drag input, the user's selection can be supported by displaying the results of key combinations that can be input in advance. This will be described in more detail with reference to FIG. 6 .

In one embodiment, the candidate key determiner 330 determines that the candidate key associated with the first touch corresponds to the first vowel and is located on an input key of a second vowel that cannot be combined with the first vowel in the process of moving the corresponding drag input. In this case, a third vowel that can be combined with the first vowel is determined along the direction of movement, and a combination result between the first and third vowels may be provided in advance through a text input window. This will be described in more detail with reference to FIG. 6 .

The candidate character determination unit 350 may determine at least one candidate character generated by a combination of a plurality of candidate keys. A user may simultaneously input several input keys through a single drag input or a multi-drag input according to a multi-touch, and accordingly, the candidate key determiner 330 may determine a plurality of candidate keys. The candidate character determiner 350 may predict characters to be input by the user based on the candidate keys determined by the candidate key determiner 330 and determine them as candidate characters.

In an embodiment, the candidate character determination unit 350 classifies a plurality of candidate keys into consonants and vowels, sorts them according to an input order, and then determines at least one candidate character through a sequential combination of corresponding consonants and vowels. The candidate character determiner 350 may sort the candidate keys by reflecting the order according to the user's touch input, and may separately classify consonants and vowels among the candidate keys.

As a result, the candidate character determination unit 350 may determine candidate characters based on candidate keys input according to the input order of consonants and vowels, and in the case of consonants, initial consonants and final consonants may be determined in order. The vowels are combined in order to determine whether they are a single character. If a character is not completed by a combination of consonants and vowels, it may be excluded in order, and the next consonant or vowel may be added to determine whether the character is completed.

The text input unit 370 may determine an input text from among at least one candidate text and input the text to the text input window. In an embodiment, the text input unit 370 may determine the first completed candidate character among at least one candidate character as an input character, or determine at least one candidate character as an input character according to the order of completion. That is, when a user's touch is initiated, the character input unit 370 inputs a corresponding character associated with the touch when a completed character is detected according to sequential operations of the candidate key determiner 330 and the candidate character determiner 350. It can be determined as a character, and it can be processed as a corresponding input character entered in the text input window. When the input text is determined and inputted, all inputs related to the currently ongoing touch may be ignored. That is, in order to input a new character, the user must end a current touch and initiate a new touch.

The control unit 390 controls the overall operation of the text input device 130, and the control flow between the keypad providing unit 310, the candidate key determination unit 330, the candidate character determination unit 350 and the text input unit 370, or You can manage data flow.

FIG. 4 is a flowchart illustrating a text input method performed by the text input device of FIG. 1 .

Referring to FIG. 4 , the character input device 130 may provide a virtual keypad implemented by arranging a plurality of consonant and vowel input keys in a predetermined order through the keypad providing unit 310 (step S410). . The text input device 130 may determine a plurality of candidate keys associated with at least one drag input on the virtual keypad through the candidate key determiner 330 (step S430).

Also, the character input device 130 may determine at least one candidate character generated by a combination of a plurality of candidate keys through the candidate character determination unit 350 (step S450). The text input device 130 may determine an input text from among at least one candidate text through the text input unit 370 and input the text to the text input window (step S470).

5 and 6 are diagrams for explaining an embodiment of a text input method according to the present invention.

Referring to FIG. 5 , the text input device 130 may display a virtual keypad having a size of 3 rows x 6 columns on the touch screen of the user terminal 110 through the keypad providing unit 310 . More specifically, the virtual keypad may be composed of input keys arranged in 3 rows * 6 columns, and consonants or vowels may be arranged in each input key. In particular, consonants may be arranged in 3 rows x 3 columns on the left side, and vowels may be arranged in 3 rows x 3 columns on the right side. In addition, the virtual keypad displays the consonants of 'a, c, f, s, o, and g' and the vowels of 'ㅗ, TT, ㅐ, ㅔ, and ㅡ' in the upper and lower rows of a three-row * six-column two-dimensional keypad. each can be placed. In addition, the remaining consonants and vowels, for example, 'ㅁ, ㄴ, ㄹ, sh, ㄱ, ㅣ' may be arranged in the middle row.

Figures (a) and (b) of FIG. 5 may correspond to embodiments of a virtual keypad having such an arrangement structure, and the text input device 130 is combined with a multi-touch function to make text input easier. A virtual keypad with a specific key arrangement can be created and provided. More specifically, 'a-ㄲ-ㅋ', 'ㄴ-ㄸ-T', 'ㅅ-ㅆ-ㅋ', 'ㅅ-ㅃ-P', 'ㅇ-ㅎ', 'ㅅ-ㅆ', 'ㅗ -Twin consonants (eg, ㄲ, ㄸ, etc.), related consonants (eg, ㅋ, TT, etc.), paired vowels (eg, Consonants or vowels associated with ㅛ, ㅑ, etc.) can be placed at the top and bottom of the virtual keypad.

For example, when there are two additional phonemes such as 'ㄱ-ㄲ-ㅋ', the character input device 130 can be input by dividing them into a short drag and a long drag, or an upper left drag and an upper right drag. It can be implemented so that the user can easily recognize it by providing a key preview in the dragging direction. In this case, if you use the virtual keypad shown in (a) or (b), you can input double consonants by dragging outward from the top or bottom area, and even if you use the multi-touch function, interference caused by nearby input keys during drag input can be minimized.

If 'a' is located in the middle row of the array in the input key arrangement in (a) or (b), when dragging after touching 'a', it is unclear whether the input is a double consonant or double consonant, or an initial consonant and a final consonant. Disengagement issues may arise.

Meanwhile, in the arrangement of the input keys of FIG. 5 , the vowel area may correspond to the same arrangement as that of the Google short vowel keyboard, and the consonant area may correspond to a layout changed from the QWERTY keyboard and the short vowel keyboard. This input key arrangement structure is a minimal modification of the layout of the QWERTY keyboard or the short vowel keyboard, and may correspond to a layout form that users of the existing QWERTY or short vowel keyboards can use more familiarly.

Referring to (a) of FIG. 6, in the character input device 130, candidate keys associated with the first touch correspond to the first collection through the candidate key determination unit 330 and the corresponding drag input is moved. When located at the input key of the second vowel that cannot be combined with the first vowel, a third vowel that can be combined with the first vowel is determined along the direction of movement, and the result of combining the first and third vowels through the text input window 510 can be provided in advance.

More specifically, in Figure (a), when a user starts a touch from 'TT' and moves to 'A' by dragging, the character input device 130 drags the character input device 130 because a combination of 'TT' and 'A' is not possible. According to the direction of 'ㅔ', 'ㅞ' can be displayed in advance as a combination result for the input vowel through the text input window 510 by predicting 'ㅔ'. At this time, the user may end the drag input as it is at 'A', and in this case, the text input device 130 may process it as inputting 'ㅞ'. Similarly, the user can move over 'A' in the process of dragging from 'TT' to 'ㅣ', and in this case, even if the drag ends at 'A', the character input device 130 inputs 'ㅟ'. can be treated as

Referring to (b) of FIG. 6, the text input device 130 determines the current drag input according to the movement of the drag input based on the first input key associated with the first touch through the candidate key determiner 330. For neighboring second input keys determined on the basis of location, results that can be combined with the first input key may be overlaid and displayed on the corresponding second input key.

More specifically, in Figure (b), when the user starts a touch from 'TT' and moves to 'A' by dragging, since the combination of 'TT' and 'A' is not possible, the character input device 130 currently Based on the position of dragging 'ㄴ', 'ㅝ', 'ㅞ', 'ㅟ', which is the combination result, for 'sh', 'ㅔ', and 'ㅣ' that can be combined with 'TT' among the surrounding input keys It can be displayed overlaid on top. In another embodiment, the text input device 130 may provide a preview function only for input keys related to the dragging direction among peripheral input keys in consideration of the user's dragging direction. In the case of Figure (b), considering that the drag direction is from 'TT' to 'A', the combination result can be displayed as an overlay only for 'ㅔ' and 'ㅣ' among input keys that can be combined.

In addition, the character input device 130 according to the present invention can provide various character input methods when complex vowels such as 'not' and 'gnaw' are included. For example, 'in' can be input with a multi-touch and 'ㅎ' can be input after ending. In addition, in the state where 'in' is input, 'ㅇ-ㄴ' touch can be terminated and 'ㅎ' can be input again as a multi-touch. In addition, in the state where 'ah' is input, the 'ㅇ' touch can be terminated and 'ㄴ-ㅎ' can be input as a multi-touch.

In addition, the text input device 130 according to the present invention may provide various additional functions for text input. For example, when dragging is performed on keys such as delete, enter, space, and numbers, a function in which the input is repeated as many times as the dragging distance or the number of times the key is pressed by dragging may be provided. there is. In addition, a function used as a keyboard shortcut such as 'alt + f4' may be provided using multi-touch. In addition, a function such as a two-finger or three-finger multi-touch swipe may be provided.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims below. You will understand that it can be done.

100: character input system
110: user terminal 130: text input device
150: database
210: processor 230: memory
250: user input/output unit 270: network input/output unit
310: keypad providing unit 330: candidate key determination unit
350: candidate character determination unit 370: character input unit
390: control unit
510: text input window

Claims (6)

a keypad providing unit that provides a virtual keypad implemented by arranging a plurality of input keys for consonants and vowels in a predetermined order;
a candidate key determination unit determining a plurality of candidate keys associated with at least one drag input on the virtual keypad;
a candidate character determining unit that determines at least one candidate character generated by a combination of the plurality of candidate keys; and
A character input unit configured to determine an input character from among the at least one candidate character and input the character to a character input window;
In the case where several input keys related to a plurality of drag inputs are simultaneously input according to the user's multi-touch,
The candidate key determiner determines information about the plurality of drag inputs based on a plurality of first touches associated with the start of each of the plurality of drag inputs and a plurality of second touches associated with the end of each of the plurality of drag inputs. determine a plurality of candidate keys;
The candidate character determining unit classifies the plurality of candidate keys into consonants and vowels, independently sorts the consonants and vowels according to the input order, and then, for the consonants determined as initial consonants and final consonants in the sorted order, the vowels are generated. Determining the at least one candidate character through a process of determining whether the characters are combined in a sorted order and are one character;
The text input unit determines the first completed candidate character among the at least one candidate character as the input character or determines each of the at least one candidate character as the input character according to the order of completion. A character input device that can be implemented.
The method of claim 1, wherein the keypad providing unit
It is formed in the size of 3 rows * 6 columns, and the consonants of 'a, c, f, ㅅ, ㅅ' and the vowels of 'ㅗ, TT, ㅐ, ㅔ' are arranged in the upper and lower rows, respectively. Character input device that can be implemented with software, characterized in that provided as a virtual keypad.
delete The method of claim 1, wherein the candidate key determining unit
Based on the first input key associated with the first touch, according to the movement of the corresponding drag input, a result that can be combined with the first input key is determined for each of the second input keys in the vicinity determined based on the position of the current drag input. A character input device that can be implemented with software, characterized in that it is displayed by overlaying the second input key.
a keypad providing unit that provides a virtual keypad implemented by arranging a plurality of input keys for consonants and vowels in a predetermined order;
a candidate key determiner configured to determine a plurality of candidate keys for at least one drag input on the virtual keypad based on a first touch related to the start of the drag input and a second touch related to the end of the drag input;
a candidate character determination unit determining at least one candidate character generated by a combination of the plurality of candidate keys; and
A character input unit configured to determine an input character from among the at least one candidate character and input the character to a character input window;
The candidate key determiner determines the direction of movement when the candidate key associated with the first touch corresponds to the first vowel and is located on an input key of a second vowel that cannot be combined with the first vowel during the movement of the corresponding drag input. determining a third vowel that can be combined with the first vowel and providing a combination result between the first and third vowels in advance through the text input window;
Wherein the character input unit determines a character according to a result of the combination as the input character when the corresponding drag input ends at the input key of the second vowel.
The method of claim 1 or 5, wherein the candidate key determining unit
When the drag input is made on any one of the keys including delete, enter, space, and numbers on the virtual keypad, the input is repeated as many times as the dragging distance or the number of times the key is pressed by dragging Character input device that can be implemented by software, characterized in that to be.

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