KR20090059776A - Latin alphabet input device and mobile communication terminal including the same - Google Patents

Abstract

A Latin alphabet input apparatus and a portable communication terminal are provided to reduce the number of times a user inputs Latin alphabet keys. An alphabet input unit(110) comprises alphabet input keys for inputting alphabets. An alphabet generating unit(120) specifies the alphabets according to input patterns on the alphabet input keys, and combines specified alphabets in order. The alphabet input keys are arranged together with alphabets having the same articulation type in pronunciation.

Description

LATIN ALPHABET INPUT DEVICE AND MOBILE COMMUNICATION TERMINAL INCLUDING THE SAME}

The present invention relates to a Latin character input device and a portable communication terminal including the device.

Latin, also called 'Romanza', is the most widely used phoneme character in the world, and it is the basic character that records almost all European languages, including English. Latin characters are also used to enter Japanese or Chinese characters in portable communication devices. In other words, when a text message is written in a portable communication device in a language in which a combination of characters is complicated, a method of inputting an English character having a pronunciation similar to that of a corresponding language is used to convert the character into a native character.

In the English keyboard of a portable communication device such as a conventional mobile phone, as shown in FIG. 4, English characters are arranged in alphabetical order. In addition, a keyboard in which a keypad is further added to reduce the number of Latin characters arranged in one keypad is also conventionally used.

Conventional English keyboard layout method of a portable communication device such as a mobile phone simply arranges the English characters in alphabetical order, so that a great inconvenience in use is required. In addition, the keyboard further added to the keypad is inconvenient to carry and use.

An object of the present invention is to provide a Latin character input device and a portable communication terminal in which Latin characters are efficiently arranged in a limited keyboard space. Another object of the present invention is to provide a Latin character input device and a portable communication terminal having a keyboard arrangement that reduces the number of key inputs of Latin characters in a limited keyboard space. It is still another object of the present invention to provide a Latin character input device and a portable communication terminal having a keyboard arrangement that can easily learn the arrangement of Latin characters.

The Latin character input apparatus of the present invention includes a character input unit including alphabet input keys for inputting alphabets, and character generation means for specifying the alphabets and combining the specified alphabets in order according to input patterns for the alphabet input keys. The alphabet input keys may include one or more alphabet input keys in which alphabets having the same articulation form at the time of pronunciation are arranged together.

In addition, the portable communication terminal of the present invention includes a communication unit for performing data communication with the base station to transmit the Latin character input device and the text message created by the Latin character input device.

In this case, each of the one or more alphabet input keys includes alphabets belonging to one alphabet group among alphabet groups 'bmp', 'cs', 'dt', 'fvj', 'gkh', 'ln' and 'rwq'. Can be arranged. Therefore, according to the present invention, since alphabets having the same or similar articulation in pronunciation are arranged on the same input key, it is easy to understand the keyboard layout and further reduce the number of key inputs in comparison with the conventional keyboard layout.

Meanwhile, in order to further reduce the number of key inputs, a special character input key may be utilized for switching between upper and lower case letters, specifying duplicate characters, and specifying special alphabets. In addition, by placing frequently used punctuation marks (commas, question marks, exclamation marks, periods, etc.) on the alphabet input key, the number of key inputs in writing a text message can be further reduced. In order to further reduce the number of key inputs, alphabets may be arranged in the alphabet input keys according to the frequency of appearance in the dictionary. In addition, the alphabet 'abcdefg' may be displayed in capital letters on the alphabet input key for easy identification of the input key and easy understanding of the keyboard layout.

According to the present invention, it is possible to provide a Latin character input device and a portable communication terminal in which Latin characters are efficiently arranged in a limited keyboard space. In addition, according to the present invention, it is possible to provide a Latin character input device and a portable communication terminal having a keyboard layout that reduces the number of key inputs of Latin characters in a limited keyboard space. In addition, according to the present invention, it is possible to provide a Latin character input device and a portable communication terminal having a keyboard arrangement that can easily learn the arrangement of Latin characters.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention. This specification first describes the functions of each part of the Latin character input apparatus according to the embodiment of the present invention. Then, the alphabet assignment method according to the principles of the present invention can significantly reduce the number of key inputs compared to the conventional alphabet assignment method. Explain the results of the experiment.

1 illustrates a Latin character input device 10 according to an embodiment of the present invention, which is composed of a character input unit 110, a character processing unit 120, a display unit 130, a memory unit 140, and a controller 150. have. In the following embodiments, the description will be made using English as an example, but a language (eg, German, French, etc.) having a meaning by arrangement of alphabets including Latin language in addition to English is included in the embodiments of the present invention. It will be easy to understand.

1. Character input unit 110

The character input unit 110 includes 10 alphabet input keys (1 to 0) and special character input keys ('*', '#' for inputting vowels (a, e, i, o, u) and English consonants of the English alphabet. '), Consisting of a keypad (FIG. 2).

Each of the ten alphabet input keys is assigned a plurality of alphabets in accordance with the principles of the present invention described below. The principles of the present invention have been established in view of the fact that a Roman alphabet having a phonetic character system such as Korean can be classified according to the form of articulation as well as Korean.

In the keyboard layout of FIG. 2, 'GKH' is assigned to one input key. This is because the Romans G, K, and H all have the same articulation. In the present specification, the term "same" articulation form refers to a form of articulation in which the movement of pronunciation organs, such as tongue, lips, teeth, etc., during the pronunciation of the Roman alphabet.

The Roman letter G (pronounced symbol [g]) embodies the position of the tongue as seen from the right side of the mouth when pronounced. Roman G shows the back of the tongue touching the soft palate. The Roman letter K (pronounced [k]) is a sharp representation of the posterior tongue reaching harder than the Roman letter G when pronounced. The Roman letter H (pronounced symbol [h]) is a representation of the air flowing through the tongue when pronounced. The posterior tongue does not touch the soft palate, but the behavior of the tongue during pronunciation is similar to G and K. As described above, since the Roman letters G, K, and H have the same articulation form, the Roman letters G, K, and H are assigned to one input key in the embodiment of the present invention.

Roman L (pronounced [l]) and Roman N (pronounced [n]) show the front of the tongue (legend) touching the gums when pronounced. Therefore, in the embodiment of the present invention, the Roman letters L and N are assigned to one input key.

Roman letters B (pronunciation [b]), M (pronunciation [m]), and P (pronoun [p]) have a common feature of lip sounds. Therefore, in the embodiment of the present invention, these Roman letters are assigned to one input key. On the other hand, the Roman letters B, M, and P have the same '한글', 'ㅁ', 'ㄷ' in Korean and Jejae-ri (制 字 原理).

Roman letters D and T are similar to L and N in that the legendary part touches the gums, but differs from L and N in that the entire tongue falls off the gum and makes a sound. L and N sound as the legend sticks to the gums. Therefore, in the embodiment of the present invention, the Roman letters D and T are assigned to one input key.

The Roman letters C and S (both phonetic symbols [s]) are the sounds of the wind blowing through the legend. Roman S produces a weak wind, and Roman C produces a strong wind. Therefore, in the embodiment of the present invention, Roman letters C and S are assigned to one input key. On the other hand, the Roman letters C and S correspond to 's' and 's' in Hangul.

The roman letters F and V have a common feature of naïve sound as the lower lip and upper teeth touch. Roman J is an oral sound, but its windlike sliding art is similar to that of F and V. Therefore, in the embodiment of the present invention, the Roman letters F, V, and J are assigned to one input key.

Roman characters R, W, and Q are all characterized by the action of the posterior tongue. That is, all three letters have a common feature that the tongue is pronounced as the posterior tongue contracts. In particular, R is pronounced as the tongue is concave overall. Therefore, in the embodiment of the present invention, the Roman letters R, W, and Q are assigned to one input key.

Roman letters X, Y, and Z are assigned to a single input key because the frequency of appearance in all English words is very low.

On the other hand, it is not necessary that all the alphabet input keys have the same articulation type together, and if necessary, some alphabet input keys may be assigned the same alphabets with the same articulation type.

In this way, when characters of the same articulation type are tied to one input key, users of a language group using Latin characters and languages (for example, Japanese or Chinese) using Latin characters as input means of their own languages are included. Users have the advantage of making the keyboard layout much easier to learn. In addition, as will be described later, according to the keyboard layout of the present invention as described above has the additional advantage that can significantly reduce the number of key input compared to the conventional keyboard layout.

On the other hand, the keyboard layout of Figure 2 is arranged so that the first letter of each alphabet input key appears in alphabetical order (A ~ G) for easy identification, the first letter is displayed in capital letters. However, as shown in the experimental results described below, in the case of 'Bmp', it is also possible to arrange in the order of increasing frequency of the English dictionary, that is, 'pmB'.

In addition, a special character (symbol) including punctuation marks such as a comma, a period, a question mark, an exclamation point, and the like may be further allocated to a part of the alphabet input key. Therefore, it is not necessary to select special characters on a separate screen when creating a text message, which speeds up key input. In addition, for easy identification, the first letter of each alphabet input key is shown in capital letters. Alphabets assigned to each input key are set to be specified sequentially and repeatedly for each key input. For example, each time the input key to which the input key 'Bmp' is assigned is pressed, 'b', 'm', and 'p' are sequentially and repeatedly specified.

One of the special character input keys (eg '#') can be used to specify the case of the alphabet. You can switch between 3 different case using '#'. The first is to use '#' to switch case by character. For example, if the alphabet input key is pressed, a lowercase letter (or uppercase letter) is specified by default, and if the alphabet input key and the special character input key '#' are pressed together, the uppercase letter (or lowercase letter) is specified. For example, if the lower case input is the default, entering 'a' and '#' consecutively will specify 'A', and pressing '#' again will specify 'a'. In this way, case switching is repeated sequentially.

In the second case, '#' is used for all case conversion. If you press the alphabet input key, the lowercase letter (or uppercase letter) is specified by default, and if you press '#', all subsequent characters are designated as uppercase letter (or lowercase letter) until '#' is pressed again. For example, if you press '#', 'abcd', '#' and 'efg' sequentially, 'ABCDefg' is displayed on the screen.

Thirdly, pressing '#' once switches the case for each character, and pressing '#' twice consecutively switches the case. For example, in the case where the lower case input is the default, to input "ABCdEFghI", "##-a-b-c-d-#-e-f-##-g-h-i- #" is sequentially pressed. In this example, if you want to input all the letters after I in uppercase, you can press '##-i' instead of the last keystroke "i- #".

As such, when a special character input key is used for inputting the uppercase and lowercase letters, it is not necessary to switch between uppercase and lowercase letters on a separate screen, thereby speeding up the key input.

The other one of the special character input keys (for example, '*') is used to input duplicate characters. For example, if the alphabet input key 'm' is pressed and the special character input key '*' is pressed, 'mm' is input. Therefore, according to the present invention, in order to input the word "comment", press the input key in the order of "3-11-22-*-5-88-44". However, in the conventional alphabet input method (FIG. 4), in order to input "comment", the input keys are pressed in the order of "3-666-space-6-space-6-33-66-8", or the space key ( Instead of inputting the "> " input key of the cellular phone keypad of FIG. Therefore, according to the input method of the present invention, the number of times of input of the input key and the input speed are increased.

'가 특정된다. 따라서 본 명세서에서 '특수 알파벳'이라 함은, 알파벳 자음 또는 모음에 알파벳 이외의 다른 심볼들이 해당 알파벳에 추가됨으로써 해당 알파벳 자음 또는 모임이 변형된 것이라고 정의할 수 있다. In addition, the special character input key (for example, '*') may be used to specify a special alphabet (eg, an umlaut alphabet on a vowel) in addition to the 26 formal alphabets such as German and Swedish. For example, if you press the vowel 'a' and press the special character input key '*', the 'a umlaut'

'Is specified. Accordingly, the term "special alphabet" in the present specification may be defined as a variation of the alphabet consonant or a group by adding symbols other than the alphabet to the alphabet consonant or vowel.

Alternatively, press the vowel 'a' and press the special character input key '*' to specify 'aa', and press the vowel 'a' and press the special character input key '*' twice in a row to set the 'a umlaut' to be specified. It may be. In this case, for each key input of the special character input key '*', 'aa' and 'a umlaut' are sequentially and repeatedly displayed on the screen. For example, 'aa' appears on the screen when the first '*' is input, 'a umlaut' appears on the screen when the second '*' is input, and 'aa' appears when the third '*' is input. It appears on the screen again, and the 'a umlaut' appears again on the screen when the fourth '*' is entered.

,

,

등의 특수 알파벳도 '*'을 이용하여 특정할 수 있다. 또한, 복수의 특수 알파벳을 표현하기 위해, '*'을 1 회 누를 때마다 해당 복수의 특수 알파벳들이 순차적이고 반복적으로 특정되도록 할 수도 있다.On the other hand, in addition to umlauts,

,

,

Special alphabets such as can also be specified using '*'. In addition, in order to express a plurality of special alphabets, the plurality of special alphabets may be sequentially and repeatedly specified each time '*' is pressed.

2. Character processing unit 120

The character processing unit 120 includes a character specifying unit 120a for specifying an alphabet and a character combining unit 120b for sequentially combining a specified alphabet according to a key input pattern for an input key. The character processing unit 120 cooperates with the memory unit 140 and the control unit 150, which will be described later, to constitute the character generating means of the present invention.

The character specifying unit 120a specifies a character according to a key input pattern from the character input unit 110. The character specification method by the character specification part 120a of this embodiment is as follows.

<Specific method of collection>

The vowels a, e, i, o, and u are set to be specified sequentially and repeatedly for each key input for the corresponding input key. Each time the 'Ao' input key is pressed, 'a' and 'o' are specified sequentially and repeatedly. Each time the 'Eiu' input key is pressed, 'e', 'i' and 'u' are specified sequentially and repeatedly. In addition, the special character input key '#' is used for the case-by-vowel switching and / or the whole case change, and the special character input key '*' is used for the specification of the special alphabet such as duplicate vowels and umlaut vowels. The specific method of the vowel according to the present embodiment is summarized in Tables 1 to 4. In Tables 1 to 4, the numbers are numbers assigned to the keypad of FIG.

[Table 1] '#' for case conversion by vowel

small letter capital letter Duplicate collection Umlaut collection a One One-# a- * a-** e 5 5- # e- * e-** i 55 55- # i- * i-** o 11 11- # o- * o-** u 555 555- # u- * u-**

When the lower case input is the default, pressing 'a # *' will display 'AA' on the screen, and pressing 'a # **' will display 'Aumlaut' on the screen. To specify 'Aa', you must press 'a # a'. To specify 'aA', you need to press 'aa #'. The same applies to the remaining vowels.

[Table 2] '#' is used for all case conversion

small letter Switch case Duplicate collection Umlaut collection a One   # a- * a-** e 5 e- * e-** i 55 i- * i-** o 11 o- * o-** u 555 u- * u-**

If the lower case input is the default, pressing '# a *' will display 'AA' on the screen, and pressing '# a **' will display 'Aumlaut' on the screen. To specify 'Aa', you must press '# a # a'. To specify 'aA', you must press 'a # a'. The same applies to the remaining vowels.

On the other hand, as described above, it is possible to set the case-by-letter switching for each character at the time of '#' input once, and the case-to-case switching when the '#' is input twice.

[Table 3] '*' is used only for specific duplicate collection

small letter capital letter Duplicate collection a One '#' Vowel case by case and / or full case a- * e 5 e- * i 55 i- * o 11 o- * u 555 u- *

[Table 4] '*' is used only for specific umlaut collection

small letter capital letter Umlaut collection a One '#' Vowel case by case and / or full case a- * e 5 e- * i 55 i- * o 11 o- * u 555 u- *

<Specific method of consonants>

The consonants are set to be specified sequentially and repeatedly for each key input for the corresponding input key. For example, each time the 'Bmp' input key is pressed, 'b', 'm' and 'p' are sequentially and repeatedly specified. In addition, the special character input key '#' is used to switch between upper and lower case letters and / or the whole case, and the special character input key '*' is used to specify duplicate consonants. The case conversion method and the specific method of duplicate consonants are the same as described above with respect to vowels. In particular, in English, redundant consonants are frequently used to preserve the form of short vowels (e.g., shop-shopped, man-manning) in the tense or jet transformation. Will be beneficial.

The character combination unit 120b accepts the character specified by the character specifying unit 120a and combines the alphabets in order. In this case, when the specified character corresponds to a specific 'function' assigned to the special character input key, the character combination unit 120b cooperates with the controller 150 to execute the corresponding function.

3. Display unit 130

The display unit 130 is a display device including an LCD (Liquid Crystal Display) that outputs a key input signal input through the character input unit 110 or a control signal output by the controller 150 to the outside. It is an optional component in the character input device 10 of the present invention. The display unit 130 displays the character combination process in real time so that the user can know the character combination process.

4. Memory unit 140 and the controller 150

In the memory unit 140, a program for controlling the overall operation of the Latin character input device 10 is registered, including a program for executing the character specifying / combining method according to an embodiment of the present invention. The program registered in the memory unit 140 is processed to control the operation of the Latin character input device 10. That is, the controller 150 controls the Latin character input device 10 so that characters are generated and displayed by the character specifying / combination method, and furthermore, inputs Latin characters so that the corresponding function is executed according to the function assigned to the special character input key. Control device 10. On the other hand, although the embodiment of the present invention implements the operation of the character input device of the present invention in software by a software program registered in the memory unit 140, the Latin of the present invention in hardware by a known hardware implementation technology. It is also possible to implement the operation of the character input device 10.

3 is a functional block diagram of a portable terminal 30 incorporating the Latin character input device of the present invention. In general, a portable communication terminal including a cellular phone, a personal communication system (PCS), a PDA, an IMT2000 terminal, and the like includes a keypad 310, a processor 320, a display 330, a memory 340, and a communication unit. And 350. The communication unit 350 is configured using a communication circuit and communicates with a base station for voice communication and various data communication, and the remaining components functionally cooperate with each other to implement the Latin character input device 10 of the present invention. That is, the functions of the character input unit 110, the character processing unit 120, the display unit 130, and the memory unit 140 of the Latin character input device 10 may include the keypad 310, the processing unit 320, and the display unit of the portable terminal. 330, and the memory 340, the processor 320 of the portable terminal also performs a function of the controller 150 of the character input device 10. In addition to the components illustrated in FIG. 3, the portable terminal 30 is provided with an antenna, a microphone, a speaker, and the like for performing data communication and voice communication.

5. Experimental Results

Key input times of the conventional keyboard arrangement (FIG. 4) and the keyboard arrangement (FIG. 2) according to the embodiment of the present invention were compared. Two groups of words were used in this comparison experiment. The two word families are the most commonly used 2,690 words and 48,118 words in English, which the inventors have discovered over decades of research. The two word groups can be found on the Internet at http://blog.daum.net/awaken. In addition, this experiment was performed without the duplicate character input function which concerns on embodiment of this invention. In addition, all the input characters were unified by the lowercase letter. That is, the following experiment was conducted under the same conditions of the character switching and input method itself of the keyboard of the present invention and the conventional keyboard.

(1) The most frequently used 2,690 words in English

The total number of characters included in 2,690 words is 16,841. As a result of inputting 2,690 words using the conventional keyboard layout (FIG. 4) and the keyboard layout (FIG. 2) of the present invention, the results shown in Table 5 were obtained. In Table 5, 'n other superiority' means that the number of key inputs for a specific word is n times smaller than that of the keyboard to be compared. Table 6 shows the distribution of the 16,841 characters in 2,690 words.

As can be seen from the results of Table 5, according to the keyboard layout of the present invention (FIG. 2), it is possible to reduce at least one keystroke for the 2,334 words of the total 2,690 words than the conventional keyboard layout (FIG. 4). Able to know. In addition, the keyboard layout of the present invention is considerably more than seven other than the conventional keyboard layout.

In addition, for a total of 16,841 characters constituting 2,690 words, a pressing of 220.47% was required for a conventional keyboard arrangement, but a pressing of 161.67% was required for a keyboard arrangement of the present invention. In addition, when 182 words of the same number of inputs were included, the keyboard layout of the present invention exhibited a 93.49% reduction in the number of key inputs compared to the conventional keyboard layout.

TABLE 5

Conventional keyboard arrangement superiority (Fig. 4) Keyboard layout (FIG. 2) superiority of the present invention 1 superiority 109 254 2th superiority 39 345 3th superiority 16 361 4th superiority 7 371 5th superiority 2 310 6th superiority One 238 7th superiority none 183 8th superiority none 122 9th superiority none 65 10th superiority none 41 11th superiority none 21 12th superiority none 14 13th superiority none 8 15th superiority none One system 174 words 2,334 words Input count equal 182 words

TABLE 6

a 1,300 b 283 c 695 d 574 e 2,170 f 299 g 431 h 489 i 1,234 j 30 k 147 l 930 m 451 n 1,153 o 1,133 p 494 q 25 r 1,360 s 961 t 1,203 u 563 v 208 w 236 x 53 y 391 z 28

(2) 48,118 words that are frequently used in English

The total number of characters included in 48,118 words is 393,144. Table 7 summarizes the experimental results. Table 8 shows the distribution of 393,144 characters in 48,118 words.

As can be seen from the results of Table 7, according to the keyboard layout (FIG. 2) of the present invention, 43,363 words out of a total of 48,118 words can be reduced at least one keystroke than the conventional keyboard layout (FIG. 4). It can be seen that. Furthermore, the keyboard layout of the present invention is often more than 10 strokes superior to the conventional keyboard layout.

In addition, when 2,221 words of the same input count were included for a total of 393,144 characters constituting 48,118 words, the keyboard layout of the present invention exhibited a 94.73% reduction in the number of keystrokes compared to the conventional keyboard layout.

TABLE 7

Conventional keyboard arrangement superiority (Fig. 4) Keyboard layout (FIG. 2) superiority of the present invention 1 superiority 1,383 3,231 2th superiority 701 4,260 3th superiority 277 5,223 4th superiority 108 5,770 5th superiority 45 5,517 6th superiority 12 5,090 7th superiority 5 4,287 8th superiority One 3,425 9th superiority 2 2,391 10th superiority none 1,664 11th superiority none 1,050 12th superiority none 646 13th superiority none 389 14th superiority none 182 15th superiority none 137 16th superiority none 57 17th superiority none 22 18th superiority none 15 19th superiority none 2 20 other superiority none 4 21 other superiority none One system 2,534 words 43,363 words Input count equal 2,221 words

TABLE 8

a 33,863 b 8,437 c 17,042 d 13,648 e 44,369 f 6,250 g 9,275 h 9,886 i 33,148 j 814 k 4,040 l 21,478 m 11,052 n 27,506 o 26,531 p 11,565 q 797 r 28,686 s 23,541 t 27,885 u 14,302 v 4,363 w 4,157 x 1,115 y 8,104 z 1,290

(3) clearance

Experimental results of the above (1) and (2), the keyboard layout of the present invention showed a similar key input reduction effect of 93.49% and 94.73%, respectively, compared to the conventional keyboard layout. In addition, since the alphabets assigned to the respective input keys have the same articulation form, the keyboard layout can be learned more easily than the alphabets in the conventional sequence listing.

On the other hand, since the experiment was carried out excluding the case switching function and the duplicate character input function according to an embodiment of the present invention, when further including such functions are much better than the experimental results of (1) and (2) You get results. Further, in the keyboard arrangement of FIG. 2, in the case of the input keys of 'Bmp', 'Cs', and 'Dt', as shown in Table 6 and Table 8, the frequency of appearance of the alphabets assigned to the respective input keys is in reverse order. , For 'Gkh', the frequency of appearance is 'hgk'. Therefore, by rearranging the order of the alphabets assigned to the input keys of the keyboard arrangement of FIG. 2 according to the frequency of appearance, the number of key inputs compared with the conventional keyboard arrangement will be further reduced.

In addition, when additionally assigning symbols commonly used in a text message such as a comma, question mark, exclamation point, and period to an input key according to the embodiment of the present invention, the number of key inputs required for the actual text message input is conventionally determined. This can be significantly reduced compared to the keyboard layout of.

1 is a functional block diagram of a Latin character input device according to an embodiment of the present invention.

2 is a keypad structure of a Latin character input device according to an embodiment of the present invention.

3 is a functional block diagram of a portable communication terminal according to an embodiment of the present invention.

Figure 4 is an English keyboard array employing a conventional English alphabet input method.

Claims (17)

A character input unit including alphabet input keys for inputting alphabets, Character generating means for specifying the alphabet according to an input pattern for the alphabet input keys and combining the specified alphabets in order; The alphabet input keys may include one or more alphabet input keys in which alphabets having the same articulation form at the time of pronunciation are arranged together. The method of claim 1, wherein each of the at least one alphabet input key belongs to one of the alphabet group of the alphabet group 'bmp', 'cs', 'dt', 'fvj', 'gkh', 'ln' and 'rwq'. Latin character input device, wherein the alphabets are arranged together. The method of claim 1, wherein the character input unit further comprises a special character input key to which a special character other than the alphabet is assigned, the character generating means for converting the alphabet into upper or lower case letters by the input of the special character, Latin Character input device. The Latin character input apparatus according to claim 1, wherein the character input unit further includes a special character input key to which special characters other than alphabets are assigned, and the character generating means specifies the alphabets inputted with the special characters in succession. Character input device. The method according to claim 1, wherein the character input unit further comprises a special character input key to which a special character other than the alphabet is assigned, the character generating means, by transforming the alphabet input with the special character into a special type of other alphabet Latin character input device to identify. The method of claim 1, wherein the character input unit further comprises a special character input key to which a special character other than the alphabet is assigned, wherein the character generating means is determined whether the special character input key is input once or twice consecutively. Accordingly, the Latin character input device which specifies the alphabet inputted together with the special character input key in succession, or transforms the alphabet inputted with the special character input key into another type of special alphabet. The Latin character input device of claim 1, wherein one or more symbols of symbols including a comma, a question mark, an exclamation point, and a period are further arranged on an alphabet input key of some of the alphabet input keys. The Latin character input device according to claim 1, wherein alphabets are arranged in at least one alphabet input key of the plurality of alphabet input keys in order of appearance frequency in a dictionary. The Latin character input device according to claim 1, wherein the alphabet 'abcdefg' is displayed in capital letters on the alphabet input key, respectively. A character input unit including a plurality of alphabet input keys in which alphabets are arranged separately, and character generation means for specifying the alphabet according to an input pattern for the plurality of alphabet input keys and combining the specified alphabets in order; Each of at least one alphabet input key of the plurality of alphabet input keys includes at least one alphabet group among alphabet groups 'bmp', 'cs', 'dt', 'fvj', 'gkh', 'ln' and 'rwq'. The alphabets belonging to each other are arranged together, and other alphabets including alphabets belonging to an alphabetic group not assigned to the same alphabetical input key among the alphabetical groups are arranged separately from the other alphabetical input keys. 11. The method of claim 10, wherein the character input unit further comprises a first special character input key to which a special character other than the alphabet is assigned, wherein the character generating means, by inputting the first special character, the alphabet to uppercase or lowercase Switching, Latin character input device. 12. The method of claim 11, wherein the character input unit further comprises a second special character input key to which special characters other than alphabets are assigned, wherein the character generating means successively duplicates alphabets input together with the second special characters. The Latin character input device to be specified. 12. The method of claim 11, wherein the character input unit further comprises a second special character input key to which special characters other than alphabets are assigned, wherein the character generating means is configured to input the second special character input key once or twice. Depending on whether the input is continuous, to specify the alphabet input with the second special character input key in succession, or to modify the alphabet input with the second special character input key to another type of special alphabet to specify , Latin character input device. The Latin character input device of claim 11, wherein one or more symbols among symbols including a comma, a question mark, an exclamation point, and a period are further arranged on an alphabet input key of the plurality of alphabet input keys. A portable communication terminal comprising a latin character input device according to any one of claims 1 to 14, and a communication unit for performing data communication with a base station for transmitting a text message produced by the latin character input device. A keypad comprising ten alphabet input keys for inputting alphabets and two special character input keys for inputting special characters, and a portable device for creating characters in response to a key input to the keypad and transmitting the written characters to the outside. As a communication terminal, Each of the at least one alphabet input key among the ten alphabet input keys includes one of the alphabet group 'bmp', 'cs', 'dt', 'fvj', 'gkh', 'ln' and 'rwq'. The alphabets belonging to each other are arranged together, one of the two special character input keys is used to switch the case of the alphabet, and the other is used to successively duplicate the alphabet. The method according to claim 16, wherein each of the seven alphabet input keys of the ten alphabet input keys, the alphabets belonging to the seven alphabet groups are arranged together, and the alphabets 'aeiou' and 'xyz' are divided into three remaining alphabet input keys. Arranged, a portable communication terminal.

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