Design of an interactive bangla mobile keypad based on ergonomics

In this paper, a Bangla mobile keypad layout is proposed based on ergonomics. The finger movement across the keypad is analyzed and an optimal keypad layout is proposed for right handed one thumb operation. To minimize the effort of the user's thumb movement, the characters are organized in such a way that the most frequently used characters are positioned in the most comfortable zone of the keypad. A couple of equations are derived to calculate the required time to insert a character in different existing layouts. The performance is analyzed by comparing time which reveals that the proposed layout outperforms the other layouts.