Patent ID: 9524035
Filing Date: 2016-12-20
CPC Classification: G06F

Claim Text:
1. A method for character input by arrow keys, wherein, a mapping relationship between characters in an input character set and a sequence of arrow keys input is constructed, and at least one code table is established to indicate said mapping relationship; a character is input by code table selection keys and arrow keys, the method comprising: determining a current code table according to the input of the code table selection keys; displaying a prompt message of the current code table on a display screen; displaying characters that have already been input on the display screen; and displaying a current key input of the sequence of arrow keys that have been input on the display screen; determining the character input in the current code table according to the sequence of arrow keys input; wherein, the mapping relationship between the characters in the input character set and the sequence of arrow keys input is that: the characters in the input character set is distributed over every code table; that every character in every code table is assigned a different code value C; that for every code table, different sequence of arrow keys input is mapped with a different code value C, wherein the code value C is a number; wherein, a corresponding relationship between the sequence of arrow keys, a vector S=(S if an i-th arrow key is assigned a key-value Si, a row vector S that consist of key-values of the keys in the sequence of arrow keys input has a linear relationship with the code value C: C=S×B