Patent ID: 7287921

Claim:
A key array of a keyboard comprising: an input key section including a plurality of input keys, each of the keys having a left key part, a central key part, and a right key part, each key part corresponding to a selected input mode; a left control key positioned on a left side of the input key section so as to convert a mode of the input key section of the keyboard into a right key part input mode such that the right key part input mode is actuated when a user presses the input key; a right control key positioned on a right side of the input key section so as to convert the mode of the input key section of the keyboard into a left key part input mode so that the left key part input mode is actuated when the user presses the input key; and a shift key section including two shift keys aligned on both sides of the keyboard adjacent to the left and right control keys in order to utilize additional functions of the keyboard when the shift keys are pressed simultaneously with an input key of the input key section.