DRIVING APPARATUS FOR OPTICAL PICKUP UNIT AND OPTICAL DISC DRIVE USING THE SAME

Abstract

An apparatus for driving an optical pickup unit to a discrimination position at which a type of an optical disc can be discriminated includes an actuator, a motor, and a voltage generator. The voltage generator is electrically coupled to the motor for supplying a driving voltage to the motor. The driving voltage includes a first stage having a first voltage value for driving the optical pickup unit to move toward the outermost position, a second stage having a second voltage value for driving the optical pickup unit to move to the innermost position, and a third stage having a third voltage value for driving the optical pickup unit to move from the innermost position to the discrimination position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the optical pickup unit driving apparatus can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, the emphasis instead being placed upon clearly illustrating the principles of the present device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a schematic diagram of an optical disc drive in accordance with an exemplary embodiment, the optical disc drive including a motor;

FIG. 2 is a timing chart showing a waveform of a first driving voltage supplied to the motor of FIG. 1;

FIG. 3 is a timing chart showing a waveform of a second driving voltage supplied to the motor of FIG. 1; and

FIG. 4 is a schematic diagram of a traditional optical disc drive.

Claims

1. An apparatus for driving an optical pickup unit to a discrimination position at which a type of an optical disc can be discriminated, the optical pickup unit being movable between an innermost position and an outmost position, the apparatus comprising: an actuator for moving the optical pickup unit;a motor for driving the actuator to move the optical pickup unit; anda voltage generator electrically coupled to the motor for supplying a driving voltage to the motor, the driving voltage comprising a first stage having a first voltage value for driving the optical pickup unit to move toward the outermost position, a second stage having a second voltage value for driving the optical pickup unit to move to the innermost position, and a third stage having a third voltage value for driving the optical pickup unit to move from the innermost position to the discrimination position.

2. The apparatus as claimed in claim 1, wherein the first stage of the driving voltage lasts a first time interval that is equal to or no more than a half of a first period of moving the optical pickup unit from the innermost position to the outermost position with the first voltage value.

3. The apparatus as claimed in claim 1, wherein the second stage of the driving voltage lasts a second time interval that is equal to or greater than a second period of moving the optical pickup unit from the outermost position to the innermost position with the second voltage value.

4. The apparatus as claimed in claim 1, wherein a polarity of the driving voltage during the second stage is opposite to the polarity of the driving voltage during the first stage.

5. The apparatus as claimed in claim 1, wherein the third stage of the driving voltage lasts a third time interval that is equal to a third period of moving the optical pickup unit from the innermost position to the discrimination position.

6. The apparatus as claimed in claim 1, wherein a polarity of the driving voltage during the third stage is opposite to the polarity of the driving voltage during the second stage.

7. The apparatus as claimed in claim 1, wherein the first stage lasts to drive the optical pickup unit to move a first distance toward the outermost position, the first distance being equal to or greater than a half of a distance between the innermost position and the outermost position.

8. The apparatus as claimed in claim 1, wherein the driving voltage further comprises a pause stage having a pause voltage value equal to zero lasts a pause time interval from starting unloading a tray at a close position to the tray returns to the close position.

9. A voltage generator for generating a driving voltage for driving an optical pickup unit to a discrimination position at which a type of an optical disc can be discriminated, the optical pickup unit being movable between an innermost position and an outmost position, the driving voltage comprising: a first stage having a first voltage value for driving the optical pickup unit to move toward the outermost position;a second stage having a second voltage value for driving the optical pickup unit to move to the innermost position; anda third stage having a third voltage value for driving the optical pickup unit to move from the innermost position to the discrimination position.

10. The voltage generator as claimed in claim 9, wherein the first stage lasts a first time interval that is equal to or no more than a half of a first period of moving the optical pickup unit from the innermost position to the outermost position with the first voltage value.

11. The voltage generator as claimed in claim 9, wherein the second stage lasts a second time interval that is equal to or greater than a second period of moving the optical pickup unit from the outermost position to the innermost position with the second voltage value.

12. The voltage generator as claimed in claim 9, wherein the third stage lasts a third time interval that is equal to a third period of moving the optical pickup unit from the innermost position to the discrimination position.

13. The voltage generator as claimed in claim 9, wherein the first stage lasts to drive the optical pickup unit to move a first distance toward the outermost position, the first distance being equal to or greater than a half of a distance between the innermost position and the outermost position.

14. The voltage generator as claimed in claim 9, wherein the driving voltage further comprises a pause stage having a pause voltage value equal to zero lasts a pause time interval from starting unloading a tray to the tray returns to a close position.

15. An optical disc drive capable of discriminating an optical disc, comprising: a spindle motor for rotating the optical disc;an optical pickup unit constructed and arranged for recording and/or reproducing data onto and/or from the optical disc;an actuator for moving the optical pickup unit between an innermost position and an outmost position;a motor for driving the actuator to move the optical pickup unit; anda voltage generator electrically coupled to the motor for supplying a driving voltage to the motor, the driving voltage comprising a first stage having a first voltage value for driving the optical pickup unit to move toward the outermost position, and a second stage having a second voltage value for driving the optical pickup unit to move to the innermost position.

16. The optical disc drive as claimed in claim 15, wherein the first stage lasts a first time interval that is equal to or no more than a half of a first period of moving the optical pickup unit from the innermost position to the outermost position with the first voltage value.

17. The optical disc drive as claimed in claim 15, wherein the second stage lasts a second time interval that is equal to or greater than a second period of moving the optical pickup unit from the outermost position to the innermost position with the second voltage value.

18. The optical disc drive as claimed in claim 15, wherein the third stage lasts a third time interval that is equal to a third period of moving the optical pickup unit from the innermost position to the discrimination position.

19. The optical disc drive as claimed in claim 15, wherein the first stage lasts to drive the optical pickup unit to move a first distance toward the outermost position, the first distance being equal to or greater than a half of a distance between the innermost position and the outermost position.

20. The optical disc drive as claimed in claim 15, wherein the driving voltage further comprises a pause stage having a pause voltage value equal to zero lasts a pause time interval from starting unloading a tray at a close position to the tray returns to the close position.