ディスプレイ画面上のカーソルを制御する無線音響ベースのポインタ装置(コンピュータマウスなど)

Japanese Patent JP2005522761

A

An acoustic based pointing device and a system and method for using the pointing device to move a cursor on a display screen of a display device. The pointing device comprises an acoustic source that generates and propagates an acoustic signal that is detected by four microphones M₁, M₂, M₃, and M₄ and is then converted into corresponding periodic electrical signals S₁, S₂, S₃, and S₄. The position vector P₀ of the acoustic source is calculated by solving triangulation equations that depend on phase-shift time delays between S₁ and S_j for j=1, 2, and 3. A position vector P_C is calculated from P₀ using a scale vector that relates a change in position of the cursor to a change in position of the acoustic source. Then the cursor is moved to a position P_C associated with the position vector P_C.