Alphabet input device and alphabet recognition system in small-sized keypad

Abstract

Disclosed herein are an alphabet input device and an alphabet recognition system in a small-sized keypad. The device includes: a first keypad part comprising a plurality of buttons each of which is assigned with a symbol extracted from strokes of alphabet characters so that the alphabet characters be input by one of the buttons or a combination of two or more of the buttons; and a second keypad part comprising one or more buttons each assigned with an alphabet character having a high usage frequency. With the device, alphabet characters can be inputted in a simpler and more efficient manner.

1 . A character input device in a keypad, comprising:
 a keypad unit to receive an input of a character input button from a user, the keypad unit comprising a plurality of character input buttons;   a character forming unit to form a character with two inputs of the character input buttons or fewer; and   a display unit to display the formed character on the user,   wherein the keypad unit receives the input through a touch screen.   
     
     
         2 . The character input device of  claim 1 , wherein the keypad unit includes the character input buttons corresponding to characters ‘-’, ‘∥’, ‘.’, ‘I’, ‘C’, ‘O’, ‘U’, ‘V’, ‘A’, ‘E’, ‘P’, ‘O’, and ‘T’,
 the character is formed by the input character alone or a combination of the input characters through the character forming unit, and 
 the character formed by the combination of the input characters is determined based on a first input and a second input. 
 
     
     
         3 . The character input device of  claim 2 , wherein a character ‘B’ is formed with the first input of the ‘P’ button and the second input of the ‘O’ button, and a character ‘R’ is formed with the first input of the ‘P’ button and the second input of the ‘.’ button. 
     
     
         4 . The character input device of  claim 2 , wherein a character ‘D’ is formed with the first input of the ‘I’ button and the second input of the ‘O’ button, a character ‘K’ is formed with the first input of the ‘I’ button and the second input of the ‘C’ button, a character ‘N’ is formed with the first input of the ‘I’ button and the second input of the ‘V’ button, and a character ‘L’ is formed with the first input of the ‘I’ button and the second input of the ‘-’ button. 
     
     
         5 . The character input device of  claim 2 , wherein a character ‘M’ is formed with the first input of the ‘∥’ button and the second input of the ‘V’ button, and a character ‘H’ is formed with the first input of the ‘∥’ button and the second input of the button. 
     
     
         6 . The character input device of  claim 2 , wherein the second input of the ‘.’ button forms a character ‘G’ with the first input of the ‘C’ button, a character ‘Q’ with the first input of the ‘O’ button, a character ‘F’ with the first input of the ‘T’ button, a character ‘Y’ with the first input of the ‘V’ button, a character ‘i’ with the first input of the ‘I’ button, a character ‘j’ with the first input of the ‘U’ button, and a character ‘,’ with the first input of the ‘-’ button. 
     
     
         7 . The character input device of  claim 2 , wherein the character is formed with a double click as the first input and the second input, and
 a character ‘W’ is formed with the double click of the ‘∥’ button, a character ‘X’ is formed with the double click of the ‘I’ button, and a character ‘Z’ is formed with the double click of the ‘-’ button.   
     
     
         8 . The character input device of  claim 2 , wherein a character ‘S’ is formed with the first input of the ‘C’ button and the second input of the ‘O’ button, and a character ‘?’ is formed with the first input of the ‘O’ button and the second input of the ‘.’ button. 
     
     
         9 . The character input device of  claim 2 , wherein the keypad unit displays a character input button available for the second input distinguishably when the keypad unit identifies the first input. 
     
     
         10 . The character input device of  claim 2 , wherein the first input and the second input are based on a touch-and-drag operation, and
 the first input is implemented by touching a character input button, and the second input is implemented by dragging the touched character input button and releasing the touch.   
     
     
         11 . A method for inputting a character in a keypad, the method comprising:
 receiving an input, from a user, of a character input button in a keypad comprising a plurality of character input buttons;   forming a character with two inputs of the character input buttons or fewer; and   displaying the formed character on the user,   wherein the receiving of the input comprises receiving the input through a touch screen.   
     
     
         12 . The method of  claim 11 , wherein the character input buttons include buttons corresponding to characters ‘-’, ‘∥’, ‘.’, ‘I’, ‘C’, ‘O’, ‘V’, ‘A’, ‘E’, ‘P’, ‘O’, and ‘T’,
 the character is formed by the input character alone or a combination of the input characters, and 
 the character formed by the combination of the input characters is determined based on a first input and a second input.