Patent ID: 7046604
Filing Date: 2006-05-16
Classification: G11B

Abstract:
1. An optical disc driving apparatus, comprising: a stepping motor having a plurality of coils; a detecting unit for detecting an exterior vibration while being vibrated in response to said exterior vibration; a driver IC for supplying control currents for controlling said stepping motor to said coils of said stepping motor to have said stepping motor assume two different operation states consisting of a first operation state to drive said stepping motor to ensure that said rotation shaft of stepping motor is rotatably moved around its rotation axis, and a second operation state to drive said stepping motor to ensure that said rotation shaft of stepping motor fails to be rotatably moved around its rotation axis; and a control signal producing unit for producing a control signal to have said driver IC supply control currents in association with said exterior vibration detected by said detecting unit to said coils of said stepping motor to have said stepping motor assume said second operation state after judging whether or not said exterior vibration detected by said detecting unit is larger in amplitude than a predetermined threshold level.