KR20050114966A - Character recognition keypad in mobile communication device - Google Patents

Abstract

The present invention relates to a character recognition keypad of a mobile communication terminal. In the related art, a character is recognized and displayed on a screen by pressing a numeric keypad used in combination with a Hangul input several times, thereby inputting a large amount of Hangul. When the keypad has to be pressed several times, there was a problem that it takes a long time. In view of the above problems, the present invention is characterized in that a keypad of a mobile communication terminal is configured with a Hangul keypad for inputting a Korean consonant or a vowel, respectively, at corners and empty spaces of a numeric keypad. In this way, it is possible to reduce the trouble of inputting characters by several operations and to save time.

Description

Character recognition keypad for mobile terminal {CHARACTER RECOGNITION KEYPAD IN MOBILE COMMUNICATION DEVICE}

The present invention relates to a character recognition keypad of a mobile communication terminal. Particularly, a keypad for inputting a character exists separately on the surface of a numeric keypad so that when a character keypad is pressed, a character written on the keypad can be directly output on a screen. Relates to a character recognition keypad.

Since the mobile communication terminal is made small in size so that the user can easily carry it, it is common that the input device is made small and the input buttons are made in a small number due to its characteristics.

The input device of the mobile communication terminal is composed of a function button for selecting a function and a number button for inputting a telephone number, and the number button includes a function for inputting Korean and English in parallel with the number. Since more than one Korean consonant or vowel corresponds to the number button of the Hangul input function, if you want to input Hangul through this type of input device, you must not only select multiple buttons but also select the same button repeatedly. In some cases.

According to an embodiment of the prior art, the Korean input method of a mobile communication terminal allocates six Korean terminal sounds to each of the consonant keys, classifies six Korean short vowels into similar vowels, and assigns four vowel keys to the Korean short vowels. The consonant and the vowel not assigned to the consonant and the vowel are characterized in that the consonant and the vowel are input in successive combinations with the consonant and the vowel.

1 is a diagram illustrating a keypad of a mobile communication terminal for inputting a Korean character of a conventional mobile communication terminal. As shown in FIG. 1, the numeric keys 1, 2, 4, 5, 7, and 8 are consonant keys and six Korean terminal sounds ( A, b, r, ㅁ, ㅅ, ㅇ), and the numeric keys 3, 6, 9, and 0 are six short vowels (ㅏ, ㅓ, ㅗ, ,, ㅣ, ㅡ) for inputting Korean short vowels. Classified as) and assigned to four vowel keys.

Asterisk keys (*, capture keys) can be assigned consonants and vowels that are not assigned to the consonant keys and vowel keys.

By using the combination of the consonant keys 1, 2, 4, 5, 7, 8 and the catch key (*) and the double consonant key (#), the consonant to which the consonant key is not assigned to the consonant key can be input In Korean vowels, a combination of a stroke key (*) and a vowel key (ㅏ, ㅓ, ㅗ, ,, ㅣ, ㅡ) inputs a short vowel and a vowel vowel which are not assigned to the vowel key and add a stroke.

However, in the case of the Korean input using the keypad of the conventional mobile communication terminal as described above, the character is recognized and displayed on the screen by pressing the numeric keypad used in combination with the Korean input several times, thereby inputting a large amount of Korean. There is a problem in that it takes a long time to press the keypad multiple times.

For example, in order to input a Hangul, 'keypad', the consonant 'ㅋ' is collected using the No. 1 key and the stroke addition key (*) in the conventional keypad shown in FIG. You can select to enter a 'key'. Go ahead and select the 5th key (ㅁ) and the stroke addition key (*) twice to combine the consonant 'ㅍ' and the vowel 'ㅐ' using the 3rd and 9th (ㅣ) keys. You can enter 'Keypad' by entering ',' and entering 'De' by combining 'ㅡ' with '0' and '0' with '0' and 'Str' (*). .

Thus, 11 times keypad selection is required to input Korean 'keypad'. Considering that most mobile communication terminals use short message service except voice call, it is about 40 characters in Korean. If you write a short message consisting of a very cumbersome.

Therefore, the present invention was devised in view of the above problems, by placing a Hangul keypad corresponding to one consonant or vowel on the surface of the numeric keypad, and by pressing each Hangul keypad, the Hangul written on the keypad is displayed on the screen. It is an object of the present invention to provide a character recognition keypad of a mobile communication terminal.

The present invention for achieving the above object, in the keypad of the mobile communication terminal, characterized in that the Hangul keypad for one Hangul consonant or vowel input are configured to be arranged in the corner and the empty space of the numeric keypad, respectively.

The mobile communication terminal may further include a shift key for inputting a consonant, a space key for spacing, and a symbol key for inputting a punctuation or emoticon.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary view showing a keypad of a mobile communication terminal for text input according to the present invention, and as shown therein, a Korean keypad for consonant or vowel input of Korean characters is located at each corner of the numeric keypad. There are a total of 24 corners on the numeric keypad where you can add a Hangul keypad. Twelve consonants and 13 vowels of 'ㅏ, ㅑ, ㅕ, ㅕ, ㅐ, ㅛ, TT, ㅡ, ㅡ, ㅐ, ㅔ, ㅖ are assigned to one Korean keypad and placed on the 24 corners. When the number of three corners is insufficient, three vowels of 'ㅡ, ㅖ, ㅣ' are separately placed in the empty space below the numeric keypad.

Therefore, one or more Korean consonants or vowels correspond to one keypad, and any one of the vowels or consonants written on the keypad is input according to the number of times the keypad is selected within a predetermined time. Only the vowels or consonants of do not have to be selected repeatedly by the same key.

In addition to the Korean vowels and consonants, the space key (SP key) functions as a spacing function for writing short messages, and the shift key (up arrow) used for inputting a consonant in Korean mode. Key) and a symbol key (SYM key) used for punctuation or emoticon input are further provided for convenience in Korean writing.

3A is a circuit diagram of recognizing a keypad of a mobile communication terminal according to the present invention, and as shown therein, a microprocessor embedded in the mobile communication terminal has a GPIO pin for accepting an input of each keypad. . It consists of scanning GPIOs corresponding to R0 to R6 and driver GPIOs corresponding to C0 to C7, and the top left is composed of pins of R0C0, R1C0, R2C0, R3C0, R4C0, R5C0, and R6C0. The bottom end is arranged in the same manner as above, from R0C1 to R6C1, and the last end from R0C7 to R6C7, so that a total of 56 GPIO pins are allocated to the microprocessor.

When the mobile terminal is booted, the driver GPIO pin and the scanning GPIO pin are initialized. The driver GPIO pin is pulled down and the scanning GPIO pin is pulled up using the pull up method. Once the keypad has been initialized, the microprocessor checks the GPIO pins sequentially over time. At this time, if a predetermined keypad is selected, the driver GPIO pin is checked and the value of the corresponding pin which has been changed to the high state is stored in the register, and the remaining unselected pins remain low. . In this state, the microprocessor sequentially checks the scanning GPIO pins and stores only those pins in the register that have been turned low by the user's choice, and the remaining pins are initialized to pull-up high. Keep it at

The microprocessor reads the values of the selected driver GPIO pins and the scanning GPIO pins from the stored registers and informs the microprocessor of a keycode corresponding to the value of the assignment table to display characters or symbols on the screen.

Figure 3 (b) is a GPIO pin assignment table corresponding to the keypad of the mobile communication terminal according to the present invention, as shown in the assignment table '0' in R0C0, 'SEND' in R0C1, 'b' in R0C2 In addition, R0C3 is configured so that 56 keypads of the mobile communication terminal correspond to 56 GPIO pins of the microprocessor.

For example, if 'a' corresponding to R0C0 of the allocation table is selected, the driver GPIO pin C0 is made high and the scanning GPIO pin R0 is made low and stored in a register. This is read by the microprocessor and the corresponding 'ㄱ' is displayed on the screen of the mobile communication terminal.

As described in detail above, the present invention reduces the hassle of inputting characters in a number of operations when a mobile communication terminal user sends a short message or when a Korean input such as utilizing a notepad function is required. This will save you time.

In particular, in recent years using a mobile communication terminal, except for a voice call to spend a lot of time to send a short message, we propose a character recognition keypad for entering text more quickly and easily.

1 is an exemplary view showing a keypad of a mobile communication terminal for Hangul input according to the prior art.

2 is an exemplary view showing a keypad of a mobile communication terminal for Korean input according to the present invention.

Figure 3 (a) is a circuit diagram for recognizing the keypad of the mobile communication terminal according to the present invention.

Figure 3 (b) is a GPIO pin assignment table corresponding to the keypad of the mobile communication terminal according to the present invention.

** Description of the symbols for the main parts of the drawings **

C0 ~ C7: Driver GPIO pin R0 ~ R6: Scanning GPIO pin

S1: Upward Side Button S2: Downward Side Button

UP: Up Navigation Key DN: Down Navigation Key

LT: left navigation key RT: right navigation key

SK1: first soft key SK2: second soft key

SP: Space key VD: Side button for voice recording

SYM: Symbol Key

Claims (2)

In the keypad of the mobile communication terminal, Character recognition keypad of a mobile communication terminal, characterized in that the Hangul keypad for inputting one Hangul consonant or vowel, respectively arranged in the corner and the empty space of the numeric keypad. The method of claim 1, The mobile communication terminal further comprises a shift key for inputting a consonant, a space key for spacing, and a symbol key for punctuation or emoticon input.