Move-sled-home device and method for use in optical disc drive

A move-sled-home device for use in an optical disc drive, the move-sled-home device comprising:

• a processing unit for outputting a control signal and a selecting signal;
• a first actuating unit for generating a first driving voltage according to the control signal;
• a second actuating unit for generating a second driving voltage according to the control signal;
• a sled;
• a sled motor for generating a sled motor driving current according to the first driving voltage to move the sled;
• a spindle motor for generating a spindle motor driving current according to the second driving voltage;
• and
• a current-detecting unit for selecting the sled motor driving current or the spindle motor driving current to be converted into an indicating signal according to the selecting signal, and outputting the indicating signal to the processing unit,
• wherein during a move-sled-home action, the processing unit realizes a magnitude of the sled motor driving current according to the indicating signal, thereby determining whether the move-sled-home action is finished,
• wherein if the driving current is greater than a threshold current value after the move-sled-home action has been executed for a specified time interval, the move-sled-home action is finished, and if the driving current is smaller than the threshold current value after the move-sled-home action has been executed for the specified time interval, the move-sled-home action is not finished,
• wherein during a spindle motor stopping process, the processing unit realizes a magnitude of the spindle motor driving current according to the indicating signal, thereby determining whether the spindle motor stopping process is finished.

A move-sled-home method for use in an optical disc drive, the move-sled-home method comprising steps of:

• providing a driving voltage to a sled motor, so that the sled motor generates a driving current to move a sled;
• executing a move-sled-home action for moving the sled to a sled-home position;
• and
• determining whether the move-sled-home action is finished,
• wherein if the driving current is greater than a threshold current value after the move-sled-home action has been executed for a specified time interval, it is confirmed that the move-sled-home action is finished,
• wherein if the driving current is smaller than the threshold current value after the move-sled-home action has been executed for the specified time interval, the move-sled-home action is not finished.