Optical pickup for optical disk drive and driving method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorJin-won Lee
Life of this patent
Estimating the term…
Abstract
An optical pickup and driving method for an optical disk drive holding an optical disk includes a base, an object lens, and a slider supporting the object lens, where the object lens focuses a light on a recording surface of the optical disk. An optical head section includes the slider, where an air bearing floats the slider generated between the optical head section and the optical disk. Wire suspensions movably support the optical head section with respect to the base. A driving unit drives the optical head section in a tracking direction and a focusing direction. A latching unit selectively securely positions the optical head section at a predetermined distance away from the optical disk preventing the optical head section from colliding with the optical disk.
Claims22
A driving method for an optical pickup comprising an optical head section, the driving method comprising:
- loading and floating the optical head section in a loading direction towards an optical disk;
- maintaining the predetermined distance by an air bearing;
- recording or reproducing data on or from the optical disk with the optical head section in a loaded state;
- and
- unloading the optical head section away from the optical disk when the optical head section or the optical disk operates abnormally.
The driving method of 10, wherein the stopping of the supply of electric current comprises:
- determining whether a predetermined time elapses after the loading of the optical head section;
- stopping power supply to a spindle motor rotating the optical disk after the unloading of the optical head section when the predetermined time elapses;
- and
- determining whether an operation signal is input when the power supply to the spindle motor is stopped, wherein the loading of the optical head section is performed when the operation signal is input.
An optical head loading method to protect an optical head section in an optical pickup and an optical disk from external shock, comprising:
- securely positioning the optical head section in the optical pickup at a distance from the optical disk;
- detecting whether an external shock in the optical pickup is less than or equal to a predetermined base value affecting the optical pickup;
- supplying electric current to a focusing coil in the optical pickup in a predetermined direction to drive the optical head section in a loading direction away from the secured position towards the optical disk if the detecting of the external shock is less than or equal to the predetermined base value;
- generating an air bearing between the optical disk and the optical head section by an elastic force from wire suspensions supporting the optical head section with respect to the base;
- stopping the electric current to the focusing coil to remove the loading force provided to the optical head section;
- maintaining the air bearing generated between the optical disk and the optical head section;
- and
- recording or reproducing data on or from the optical disk.
An optical head unloading method to protect an optical head section in an optical pickup and an optical disk from external shock, comprising:
- detecting whether an external shock in the optical pickup is greater than a predetermined base value;
- supplying electric current to a focusing coil in the optical pickup in a predetermined direction to drive the optical head section downward in an unloading direction if the detecting of the external shock is greater than the predetermined base value;
- and
- securely positioning the optical head section at a predetermined distance from the optical disk.
An optical head unloading method to protect an optical head section in an optical pickup and an optical disk from external shock, comprising:
- detecting an external shock in the optical pickup greater than a predetermined base value;
- stopping supply of electric current to a spindle motor in the optical pickup in response to detecting the external shock, wherein the spindle motor generates a counter electric voltage until the spindle motor stops;
- applying the generated counter electric voltage as an unloading force onto the optical head section;
- moving the optical head section downward in an unloading direction;
- and
- securely positioning the optical head section at a predetermined distance from the optical disk.
An optical head unloading method to protect an optical head section in an optical pickup and a disk cartridge from external shock, comprising:
- mounting or removing the disk cartridge;
- detecting whether an external shock in the optical pickup is greater than a predetermined base value;
- supplying electric current to a focusing coil in the optical pickup in a predetermined direction to drive the optical head section downward in an unloading direction if the detecting of the external shock is greater than the predetermined base value;
- and
- securely positioning the optical head section at a predetermined distance from the disk cartridge.
Dependencies are inferred from the claim text.