KR20020064574A - Character recognition apparatus and method for use in a communication terminal having touch-sensitive screen - Google Patents

Abstract

PURPOSE: A device and a method for recognizing a character of a communication terminal having a touch screen are provided to input a character conveniently and increase a recognizing rate of an inputted character. CONSTITUTION: In a device for recognizing an inputted character in a communication terminal having a touch screen(100), a character input window(110) is included in the touch screen(100) and has a plurality of areas of "n X n" matrix type. A character pattern storing unit(300) stores a plurality of character patterns comprising partial areas out of the areas. A character recognizing unit(200) checks a character pattern comprising areas being selected in the areas from the character pattern storing unit(300) and recognizes a character comprising at least one character pattern being checked.

Description

CHARACTER RECOGNITION APPARATUS AND METHOD FOR USE IN A COMMUNICATION TERMINAL HAVING TOUCH-SENSITIVE SCREEN}

The present invention relates to a communication terminal having a touch screen, and more particularly, to an apparatus and method for accurately recognizing a character input through the touch screen.

Recently, a touch-sensitive screen is attached to a communication terminal such as a hand held phone, a personal digital assistant (PDA), or a palm-sized personal computer. can see. Such a touch screen is intended to facilitate the user's input of desired information more easily than using a keyboard. While there is such a convenience, there are many restrictions for the accurate recognition of handwritten characters entered by the user through the touch screen.

For example, when using a mobile phone with a touch screen, a user inputs a desired character by writing a letter on the touch screen using a pointed input pen. If you write the letters again and again correctly, you will theoretically be able to recognize almost 100% of the input characters. However, in order to recognize such a character, attention is required to hold a mobile phone with one hand and write a letter carefully with the other hand. If the hand or the mobile phone shakes or letters are written while moving, the input characters are likely to be recognized as other characters. Accordingly, in a mobile phone having a touch screen, a dedicated input pen for character input is used.

In addition, not only the entire touch screen must be designed to sense pressure in detail, but also the sensitivity, that is, the resolution that can be recognized, must be very high in order to recognize all complex characters. In addition, in order to recognize input characters, various variables such as different fonts, hand shaking, and font size must be taken into account, so that the implementation of the algorithm for character recognition becomes very complicated. Of course, since English alphabets and numbers are simpler in structure than Korean, the complexity of implementing a touch screen for character recognition will be lowered. However, even when English alphabets and numbers are entered as characters, various variables such as fonts and sizes, which are different for each user, have to be taken into consideration. Therefore, the algorithm for character recognition is still complicated.

Meanwhile, the Palm Company of the United States has proposed a character pattern as shown in Fig. 1 called "Graffiti" for use in Palm PDA.

The character pattern as shown in FIG. 1 has two kinds of factors that make it difficult to recognize a character, first, that the stroke order is different for each person even if the same character is used, and second, that it is more complicated than necessary to distinguish the 26 English alphabet characters. The aspect of this is considered and proposed. This character pattern has a new form different from that of the existing alphabet, and has the advantage of simplifying the character recognition algorithm. However, in order to use such a character pattern, there is a disadvantage in that a character pattern different from the existing alphabet as shown in FIG. 1 must be learned.

As described above, the input character recognition method in the communication terminal having a touch screen according to the prior art can be largely divided into two types. This method recognizes characters using normal character (Korean / English / numeric) pattern and recognizes characters using changed character pattern (eg “Graffiti”). However, both methods have several problems. Since both methods use a pen as an input device, it is inconvenient that both hands are used because one hand holds the communication terminal and the other hand writes a letter. In addition, if the writing is not clearly written, there is a limit that the probability of misrecognition increases. In addition, the changed character pattern, such as Graffiti, has a higher recognition rate and relatively simpler implementation than the general character pattern, but has a disadvantage in that the user must learn a new character pattern. Finally, both methods require the use of a touch screen with high detection resolution and the central processing unit (CPU) consumption and random access memory (RAM) capacity in the communication terminal to run complex recognition algorithms. have.

Accordingly, an object of the present invention is to provide a character recognition apparatus and method for improving a recognition rate of input characters while a user inputs characters more conveniently in a communication terminal having a touch screen.

Another object of the present invention is to provide a character recognition apparatus and method for eliminating the burden of a user learning a separate character pattern for improved character recognition rate in a communication terminal having a touch screen.

Still another object of the present invention is to provide an apparatus and method for accurately recognizing input characters without using a touch screen having a high detection resolution in a communication terminal having a touch screen.

It is still another object of the present invention to provide an apparatus and method for simplifying a complicated algorithm used to recognize a character input through the touch screen in a communication terminal having a touch screen.

Another object of the present invention is to provide an apparatus and method for reducing the cost of a touch screen, a CPU load, a RAM requirement, battery consumption, etc. required for recognizing a character input through the touch screen in a communication terminal having a touch screen. In providing.

According to a first aspect of the present invention for achieving these objects, an apparatus for recognizing an input character in a communication terminal having a touch screen is included in the touch screen, and a plurality of zones (n × n A character input window configured as a matrix, a character pattern storage unit for storing a plurality of character patterns each character pattern consisting of some of the plurality of sections, and a region selected from the plurality of sections And a character recognition unit for identifying a character pattern from the character pattern storage unit and recognizing a character consisting of the at least one character pattern to be identified.

According to a second aspect of the present invention, an apparatus for recognizing an input character in a portable terminal having a touch screen includes: a character input window included in the touch screen and having a plurality of zones structured as an (n × n) matrix; A character pattern storage unit for storing a plurality of character patterns each of which has a plurality of character patterns among the plurality of sections, and a character pattern according to the selection order of the sections selected from the plurality of sections and the sections; And a character combination unit for confirming from the character pattern storage unit and combining at least one or more character patterns to be identified, and a character recognition unit for recognizing and generating a character from the combination result of the character combination unit.

1 is a view showing an example of a character pattern proposed for character recognition according to the prior art.

2A and 2B are diagrams for explaining the principle of character recognition according to an embodiment of the present invention.

3 is a diagram illustrating a configuration of a character recognition apparatus according to an embodiment of the present invention.

4 is a view showing in more detail the character input window shown in FIG.

5 is a view showing a character pattern of Hangul consonants according to an embodiment of the present invention.

6 is a view showing a character pattern of the Hangul vowel according to an embodiment of the present invention.

7 is a view showing a letter pattern of the English alphabet according to an embodiment of the present invention.

8 is a view showing a character pattern of numbers according to an embodiment of the present invention.

9 illustrates a character pattern mapping table according to an embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

First of all, the inventor of the present application uses a liquid crystal capable of detecting the entire touch screen in a communication terminal such as a mobile phone having a touch screen, and also detects the touch screen to recognize a Korean handwriting that can be composed of many strokes. It should be noted that the resolution should be high and that the Korean characters detected by the liquid crystal are recognized after all the consonants (the initial / neutral / final) forming the characters are input. Therefore, the inventor of the present application divides each letter into a consonant unit in the order of 'ㅂ' → 'ㅏ' → 'ㄹ' → 'ㄱ', rather than recognizing a single character of 'bright', for example. Based on the fact that recognition is much simpler and the recognition rate will be higher, the present invention proposes a character recognition.

2A and 2B are diagrams for explaining the principle of character recognition according to an embodiment of the present invention. That is, when a character is input on a low-resolution touch screen having a (n × n) matrix structure consisting of a plurality of zones, how character patterns corresponding to the input character are generated, and as a result, character recognition is performed. A diagram for explaining.

Referring to FIGS. 2A and 2B, a case in which the touch screen is constructed at a low resolution, that is, a case in which the touch screen has a (3 × 3) matrix structure, is represented by a character in the communication terminal. It corresponds to a text input window on the touch screen provided for input. The text input window may configure the whole or part of the touch screen. Among the nine zones that make up the (3 × 3) matrix, the marked zones are the areas where the hand touches when entering characters, and the arrows indicate the stroke direction of the input characters.

2 (a) shows the Hangul consonant 'a'. (b) represents the Korean consonant ㄷ. (c) represents the Hangul vowel 'ㅏ'. (d) represents the Hangul vowel 'ㅗ'. (e) represents the Hangul consonant 'ㄹ'. (f) represents the Hangul consonant 'ㅁ'. (g) represents the Hangul consonant 'ㄷ'. (h) represents the Hangul vowel 'ㅖ'.

2 (a) to 2 (d) show examples of Hangul consonants which are simply written. On the other hand, (e) to (h) show examples of complex Hangul consonants. As shown in the figure, it is possible to express all Korean consonants clearly separated by a (3 × 3) matrix. Because the Hangul consonants, which are simply represented, are clearly distinguished from the marked areas among the plurality of zones, and even if the complex consonants are marked, the order of the zones marked and processed among the plurality of zones (stroke of input characters) Direction). For example, as shown in (a) and (b) 'a' and 'c' is clearly distinguished because there are differences in the areas to be marked. As another example, as shown in (f) and (g), 'ㅁ' and 't' are the same in the areas to be marked, but can be distinguished because there is a difference in the order of the areas to be processed. In other words, in the case of 'ㅁ' character, the left line is written down first and the second is written clockwise from left to right, according to the stroke order of Hangeul. There is a difference.

As described above, all the Hangul consonants may be represented by using the plurality of sections forming the (3 × 3) matrix. The present invention generates and stores character patterns corresponding to each Hangul consonants expressed in this way, and compares the selected character among the plurality of regions and the stored character patterns by inputting a character. Make sure you recognize it correctly. Herein, only some cases where the input character is the Korean alphabet are described as an example. However, character recognition may be possible even when an English alphabet or a number is input by the same principle. This will become more apparent from the following description. For reference, it should be noted that the recognized input characters are displayed on the screen of the communication terminal. In this case, the input characters are displayed in a normal font form.

3 is a diagram illustrating a configuration of a character recognition apparatus according to an embodiment of the present invention. As can be seen from the description of FIG. 2 described above, the character recognition apparatus previously defines and stores patterns of characters recognizable in a (3 × 3) matrix, and stores the patterns and character input sequences obtained when the characters are input. And comparing the stored character patterns with the input character.

Referring to FIG. 3, the character recognition apparatus according to the embodiment of the present invention includes a touch screen 100, a character recognition unit 200, and a character pattern storage unit 300. The touch screen 100 is provided for text input in a communication terminal such as a mobile phone, and includes a text input window 110 in which a plurality of zones are structured as (n × n) matrices. The character input window 110 may be implemented as a low resolution, for example, a (3 × 3) matrix in which nine zones are structured. The text input window 110 may configure all or part of the touch screen 100. The user may input a desired character through the text input window 110.

The character pattern storage unit 300 stores patterns of various expected input characters. Each pattern corresponds to some of the plurality of zones of the (n × n) matrix. For example, the character pattern storage unit 300 may store character patterns of Korean, English, and numbers. At this time, the stored character patterns are the alphabet pattern of each alphabetic unit, the alphabet is the character pattern of each alphabetic unit, and the number of the character pattern of one digit unit. An example of configuring the character pattern storage unit 300 corresponding to the case where the input character is Korean, English, or numerals is shown in FIG. 9.

The character recognizer 200 checks the character pattern, which is composed of the characters input through the character input window 110, that is, a region selected from a plurality of regions constituting the (n × n) matrix, from the character pattern storage unit 300. Recognize a character consisting of at least one character pattern to be identified. In addition, the character recognition unit 200 performs an operation of generating and displaying the recognized character. In this case, the character recognition unit 200 displays a character recognized using a normal font, that is, a general font.

The character recognition unit 200 may recognize the input character using only one character pattern in the case of English or numbers, but may recognize the input character only when using at least two character patterns in the case of Korean. When the input character is Korean, the character recognition unit 200 combines the patterns identified from the character pattern storage unit 300, recognizes the character from the combination result, and generates and displays the recognized character.

FIG. 4 is a diagram illustrating the text input window 110 shown in FIG. 3 in more detail.

Referring to FIG. 4, the text input window 110 of the touch screen 100 includes nine zones. Each zone is numbered from 1 to 9. Since the center point of each zone is the pressure sensing point and there is one sensing point in each zone, the pressure for a total of 9 points can be detected. As such, the present invention can recognize the input character by sensing the pressure only at points representing the nine zones. Based on this configuration, the character input according to the present invention is possible by hand. Character input according to the prior art is a character input is made using a separate input pen, on the contrary, in the present invention it is possible to input characters in the unit of a consonant. For reference, a mobile phone having a touch screen according to the related art uses a liquid crystal capable of recognizing the entire touch screen, and the recognition resolution has to be high in order to recognize a Korean handwriting.

For example, according to the present invention, in order to input the letter 'a', 'a' first and then 'ㅏ' must be input. 'ㄱ' is pressurized in order of zone 1 → zone 2 → zone 3 → zone 6 → zone 9 on the touch screen, and 'ㅏ' is applied to zone 2 → zone 5 → zone 8 and zone 5 → zone 6 in that order. You can enter it by adding Of course, instead of applying pressure to each zone sequentially, like pressing a button, instead of pressing the finger lightly from zone 1 to zone 9 on the touch screen, character input is made by drawing a letter 'b'. Character patterns defined according to embodiments of the present invention used for inputting each character are shown in FIGS. 5 to 8 to be described below.

5 is a diagram illustrating a character pattern of a Korean consonant according to an exemplary embodiment of the present invention.

Referring to FIG. 5, the character patterns of the Hangul consonants are illustrated. (a) shows the letter pattern for 'a', which is in the order of 1 → 3 → 9 zones. (b) shows the letter pattern for 'b', which is in the order of 1 → 7 → 9 zones. (c) represents the letter pattern for 'c', which consists of the order of 1 → 3, 1 → 7 → 9 zones. (d) represents the letter pattern for 'ㄹ', which consists of 1 → 3 → 6, 4 → 6, 4 → 7 → 9 zones. (e) represents the letter pattern for 'ㅁ', which is formed in the order of 1 → 7, 1 → 3 → 9, 7 → 9 zones. (f) represents the character pattern for 'ㅂ', which is made up of the order of 1 → 7, 3 → 9, 4 → 6, 7 → 9 zones. (g) represents the letter pattern for 'ㅅ', which is in the order of 3 → 7, 5 → 9 sections. (h) represents the letter pattern for 'o', which is in the order of 2 → 4 → 8 → 6 → 2 zones. (i) represents the character pattern for 'ㅈ', which is formed in the order of 1 → 3 → 7, 5 → 9 zones. (j) denotes a letter pattern for 'Z', which is in the order of 2 → 5, 4 → 6 → 7, and 5 → 9 sections. (k) represents the letter pattern for 'ㅋ', which is made up of the order of 1 → 3 → 9, 4 → 6 zones. (l) represents the letter pattern for 'ㅌ', which is made up of the order of 1 → 3, 1 → 7 → 9, 4 → 6 zones. (m) represents the letter pattern for 't', which is made up of 1 → 3, 1 → 7, 3 → 9, 7 → 9 zones. (n) represents the character pattern for 'ㅎ', which is made up of the order of 2 → 5, 4 → 6, 5 → 7 → 9 → 5 zones.

6 is a view showing a character pattern of the Hangul vowel according to an embodiment of the present invention.

Referring to FIG. 6, character patterns for each of the Korean vowels are illustrated. (a) shows the letter pattern for 'ㅏ', which is made up of 2 → 8, 5 → 6 zones. (b) shows the letter pattern for 'ㅐ', which is made up of the order of 1 → 7, 4 → 6, 3 → 9 zones. (c) represents the letter pattern for 'ㅑ', which is in the order of 2 → 8, 2 → 3, 8 → 9 zones. (d) represents the letter pattern for 'ㅒ'. The letter pattern consists of 1 → 7, 1 → 3, 7 → 9 and 3 → 9 zones. (e) shows the letter pattern for 'ㅓ', which is made up of the order of 4 → 5, 2 → 8 zones. (f) represents the character pattern for 'ㅔ', which is made up of the order of 4 → 5, 2 → 8, 3 → 9 zones. (g) represents the letter pattern for 'ㅕ', which is made up of the order of 1 → 2, 7 → 8, 2 → 8 zones. (h) represents the letter pattern for 'ㅖ', which is made up of the order of 1 → 2, 7 → 8, 2 → 8, 3 → 9 zones. (i) represents the letter pattern for 'ㅗ', which is made up of 2 → 5, 4 → 6 zones. (j) represents the letter pattern for 'ㅛ', which is made up of the order of 1 → 4, 3 → 6, 4 → 6 zones. (k) represents the letter pattern for 'TT', which is made up of 4 → 6, 5 → 8 sections. (l) represents the character pattern for 'ㅠ', which consists of the order of 4 → 6, 4 → 7, and 6 → 9. (m) represents the letter pattern for '-', which is in the order of 4 → 6 sections. (n) represents the letter pattern for '|', which is in the order of 2 → 8 zones.

7 is a view showing a letter pattern of the English alphabet according to an embodiment of the present invention.

Referring to FIG. 7, letter patterns for each alphabet of English are shown. (a) shows the letter pattern for 'A', which is made up of 2 → 7, 2 → 9 and 4 → 6 zones. (b) shows the letter pattern for 'B', which is made up of the order of 1 → 7, 1 → 3 → 4 → 9 → 7 zones. (c) represents the letter pattern for 'C', which is in the order of 3 → 1 → 7 → 9 zones. (d) represents the letter pattern for 'D', which is made up of the order of 1 → 7, 1 → 6 → 7 zones. (e) represents the letter pattern for 'E', which is in the order of 1 → 3, 1 → 7 → 9, 4 → 6 zones. (f) represents the letter pattern for 'F', which is made up of the order of 1 → 3, 1 → 7, 4 → 6 zones. (g) represents the letter pattern for 'G', which is in the order of 3 → 4 → 8 → 6, 5 → 6, 6 → 9 zones. (h) represents the letter pattern for 'H', which is made up of the order of 1 → 7, 4 → 6, 3 → 9 zones. (i) represents the letter pattern for 'I', which is made up of 2 → 8 zones. (j) represents the letter pattern for 'J', which is in the order of 2 → 8 → 7 zones. (k) represents the letter pattern for 'K', which is made up of the order of 1 → 7, 3 → 4, 4 → 9 zones. (l) represents the letter pattern for 'L', which is in the order of 1 → 7 → 9 zones. (m) represents the letter pattern for 'M', which is in the order of 1 → 7, 1 → 5 → 3 → 9 zones. (n) represents the letter pattern for 'N', which is made up of the order of 1 → 7, 1 → 9 → 3 zones. (o) represents the letter pattern for 'O', which is in the order of 2 → 4 → 8 → 6 → 2 zones. (p) represents the letter pattern for 'P', which is made up of the order of 1 → 7, 1 → 2 → 5 → 4 zones. (q) represents the letter pattern for 'Q', which is formed in the order of 2 → 4 → 8 → 6 → 2, 5 → 9 zones. (r) represents the letter pattern for 'R', which is made up of the order of 1 → 7, 1 → 2 → 5 → 4, 4 → 9 zones. (s) represents the letter pattern for 'S', which is in the order of 3 → 4 → 9 → 7 zones. (t) represents the letter pattern for 'T', which is made up of the order of 1 → 3, 2 → 8 zones. (u) represents the letter pattern for 'U', which is in the order of 1 → 7 → 9 → 3 zones. (v) represents the letter pattern for 'V', which is in the order of 1 → 8 → 3 zones. (w) represents the letter pattern for 'W', which is in the order of 1 → 7 → 5 → 9 → 3 zones. (x) represents the letter pattern for 'X', which is made up of the order of 1 → 9, 3 → 7 zones. (y) represents the letter pattern for 'Y', which is made up of the order of 1 → 5, 3 → 5, 5 → 8 zones. (z) represents the letter pattern for 'Z', which is made up of the order of 1 → 3 → 7 → 9 zones.

8 is a diagram illustrating a character pattern of numbers according to an embodiment of the present invention.

Referring to FIG. 8, letter patterns for each Arabic numeral are shown. (a) shows the character pattern for '1', which is made up of the order of 2 → 8 zones. (b) shows the character pattern for '2', which is in the order of 4 → 2 → 6 → 7 → 9 zones. (c) shows the character pattern for '3', which is made up of the order of 1 → 3 → 5 → 9 → 7 zones. (d) represents the character pattern for '4', which is made up of the order of 1 → 4 → 6, 2 → 8 zones. (e) represents the character pattern for '5', which is made up of the order of 1 → 4 → 5 → 8 7, 1 → 3 zones. (f) represents the letter pattern for '6', which is in the order of 1 → 4 → 7 → 8 → 5 → 4 zones. (g) represents the character pattern for '7', which is in the order of 1 → 3 → 9 zones. (h) represents the character pattern for '8', which is made up of the order of 5 → 2 → 5 → 8 → 5 zones. (i) represents the character pattern for '9', which is made up of the order of 3 → 2 → 5 → 3 → 9 zones. (j) represents the character pattern for '0', which is made up of the order of 2 → 4 → 8 → 6 → 2 zones.

As described above, the character patterns as shown in FIGS. 5 to 8 are character patterns that enable character recognition with only nine points provided in the character input window of the (3 × 3) matrix. The user must learn this character pattern to use it. Each character follows the normal stroke order and its shape is also set to be faithful to the character in consideration of the (3 × 3) matrix, thus minimizing the learning time. .

FIG. 9 is a diagram illustrating a character pattern mapping table according to an exemplary embodiment of the present invention. The character pattern mapping table may be implemented in the character pattern storage 300 shown in FIG. 3.

Referring to FIG. 9, a number string representing each character is stored in the character pattern mapping table. As described above with reference to FIGS. 5 to 8, the numbers of the zones through which the hand passes in the order of stroke among the plurality of zones of the (3 × 3) matrix are listed. Here, character patterns for Korean consonants are mapped to regions 1 to 14 of the table, character patterns for Korean vowels are mapped to regions 15 to 28, and characters for English alphabets are included in regions 29 to 54. Patterns are mapped, and character patterns for numbers are mapped in the 55,60,60 regions.

Now, if a user inputs a character (letter) by hand through the character input window 110 of the touch screen 100 shown in FIG. 3, the number of the touched area is listed in order, and the string is shown in FIG. Compared with the values stored in the character pattern mapping table as shown above, it is possible to recognize which character is input. This operation is performed by the character recognition apparatus according to the embodiment of the present invention shown in FIG.

On the other hand, the numeric string used as the pattern value of the input character may not exactly match the values in the table. For example, in the case of the letter 'P', the input sequence may be 1 → 4 → 7 → 1 → 2 → 5 → 4, depending on how large the round part of the 'P' is drawn, and 1 → 4 → 7 → 1 → 2 → 3 → 6 → 5 → 4. Therefore, when comparing with the values in the table, only the elements of the string in the table are in order in the input string, and vice versa, whether all the elements in the input string are included in the table candidate values. It does not check. The values in the table list only the key and minimum points that make up the character, so that users can recognize the characters if they enter a little bit differently. Using such a table, it can be recognized through a simple comparison operation on all Korean / English / numeric characters that can be represented as (3 × 3) matrices.

As described above, through the character pattern proposed by the present invention and the character recognition based on the same, there is an advantage that a user of the communication terminal can easily enter a character without a separate input pen. In addition, in terms of implementing a terminal capable of character recognition, there is an advantage of reducing CPU load, ROM area, and battery consumption required by a touch screen and a recognition algorithm.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (28)

An apparatus for recognizing an input character in a communication terminal having a touch screen, A text input window included in the touch screen and having a plurality of zones structured as an (n × n) matrix; A character pattern storage unit for storing a plurality of character patterns each character pattern consisting of some of the plurality of sections; And a character recognition unit which checks a character pattern composed of zones selected from the plurality of zones from the character pattern storage unit, and recognizes a character comprising at least one character pattern to be identified. The apparatus of claim 1, wherein the character recognition unit identifies the selected regions and a character pattern according to a selection order of the regions from the character pattern storage unit. The apparatus of claim 1, wherein the recognized character is Korean. The apparatus of claim 3, wherein each of the character patterns represents a consonant of Korean. The apparatus of claim 4, wherein the character recognition unit combines at least two or more character patterns, and recognizes a character from the combination result. The apparatus of claim 1, wherein the recognized character is an English letter. The apparatus of claim 6, wherein the character recognition unit recognizes a character from one character pattern. The apparatus of claim 1, wherein the recognized character is a number. The apparatus of claim 8, wherein the character recognition unit recognizes a character from one character pattern. The apparatus as claimed in claim 1, wherein the character input window is structured as a (3 x 3) matrix. A touch screen including a text input window in which a plurality of zones are structured as an (n × n) matrix, and a character pattern storage unit configured to store a plurality of character patterns in which each character pattern consists of some of the plurality of zones. In the communication terminal comprising a method for recognizing a character input through the text input window, Confirming, from the character pattern storage unit, a character pattern composed of regions selected from the plurality of regions; And recognizing a character comprising at least one character pattern to be identified. The method as claimed in claim 11, wherein, in the checking, the character patterns according to the selected regions and the order of selection of the regions are checked from the character pattern storage unit. The method of claim 11, wherein the recognized character is Korean. The method as claimed in claim 13, wherein each character pattern represents a consonant of Korean. The method as claimed in claim 14, wherein the character recognition process combines at least two or more character patterns and recognizes a character from the combination result. The method of claim 11, wherein the recognized character is an English letter. The method as claimed in claim 16, wherein the character process recognizes a character from one character pattern. The method of claim 11, wherein the recognized character is a number. The method as claimed in claim 18, wherein the character recognition process recognizes a character from one character pattern. An apparatus for recognizing an input character in a portable terminal having a touch screen, A text input window included in the touch screen and having a plurality of zones structured as an (n × n) matrix; A character pattern storage unit for storing a plurality of character patterns each character pattern consisting of some of the plurality of sections; A character combination unit which checks the character patterns according to the selection order of the zones and the zones selected from the plurality of zones from the character pattern storage unit, and combines the at least one or more identified character patterns; And a character recognition unit for recognizing and generating a character from the combination result by the character combination unit. The apparatus of claim 20, wherein the recognized character is Korean. The apparatus of claim 22, wherein each of the character patterns represents a consonant of a Korean character. The apparatus of claim 22, wherein the character combination unit combines at least two or more character patterns. 21. The apparatus as claimed in claim 20, wherein the character input window is structured as a (3 x 3) matrix. A touch screen including a text input window in which a plurality of zones are structured as an (n × n) matrix, and a character pattern storage unit configured to store a plurality of character patterns in which each character pattern consists of some of the plurality of zones. In the portable terminal comprising a method for recognizing a character input through the text input window, Confirming, from the character pattern storage unit, a letter pattern selected from the plurality of areas and a letter pattern according to a selection order of the areas; Combining the at least one character pattern to be identified; And recognizing and generating a character from a result of the combination by the character combination unit. The method as claimed in claim 25, wherein the recognized character is Korean. 27. The method as claimed in claim 26, wherein each character pattern represents a consonant of Korean. 28. The method as claimed in claim 27, wherein the at least two character patterns are combined.