Acoustic based pointing device

Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel

Reexamination Certificate

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Details

C345S169000, C178S019020

Reexamination Certificate

active

10117851

ABSTRACT:
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 M4and is then converted into corresponding periodic electrical signals S1, S2, S3, and S4. The position vectorP0of the acoustic source is calculated by solving triangulation equations that depend on phase-shift time delays between S1and Sjfor j=1, 2, and 3. A position vectorPCis calculated fromP0using 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 PCassociated with the position vectorPC.

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