KR20010010679A - Method for Controlling the Current of Spindle Motor and Sled Motor in Optical Disk Device - Google Patents

Abstract

PURPOSE: A method for controlling the current of a spindle motor and a sled motor in an optical disk device is provided to reduce current consumption and to stably operate by preventing voltage drop through rapid current consumption. CONSTITUTION: A data seek request for recorded data of an optical disk is detected while a rotation of a spindle motor is controlled through a spindle motor driver. A fed current to the spindle motor is blocked. An optical pickup is moved to a wanted position by driving a sled motor through a sled motor driver. When finishing a data seek by the driving of the sled motor, the rotation of the spindle motor is controlled by feeding the current to the spindle motor again. Thereby, current consumption is reduced and the stable operation is performed entirely by preventing voltage drop through rapid current consumption.

Description

Method for Controlling the Current of Spindle Motor and Sled Motor in Optical Disk Device

The present invention relates to a method for controlling the current of a spindle motor and a sled motor in an optical disk device. More particularly, in the optical disk device, in the optical disk device, when driving the sled motor to avoid the peak load. The present invention relates to a method for controlling the current of a spindle motor and a sled motor in an optical disk device in which the current of the spindle motor is turned off to be temporarily free-run.

As a recording medium for recording and reproducing information such as video, sound, or data with high density, optical disks, hard disks, cards, or tapes are typical, and among them, the optical disk forms the mainstream. Recently, the optical disk device field has formed a product line that extends from a laser disk (LD) and a compact disk (CD) to a digital versatile disc-read only memory (DVD). Optical discs are usually divided into CDs and DVDs. CDs are divided into CD-ROMs (CD-Read Only Memory) and CD-RWs (CD-Rewritable). DVDs are DVD-ROMs and Random Access Memory (DVD-RAM). Separated by. In addition, the DVD is a DVD-S in which only one information is recorded in a single layer on one track, and a DVD-D in which two pieces of information are simultaneously recorded in a dual layer on one track. Separated by.

1 is a block diagram illustrating an internal control apparatus of an optical disk apparatus according to the prior art.

As shown in FIG. 1, a component of the optical disk device as described above includes a spindle motor driver 20 for driving the spindle motor 10 to rotate the optical disk, and the optical pickup is formed on the inner circumference of the disk. There is a sled motor drive 40 for driving the sled motor 30 so as to move at a high speed to the outer periphery, and the optical disk device including the spindle motor driver 20 and the sled motor driver 40. There is an optical disk controller 50 that controls each component as a whole.

The spindle motor driver 20 continuously performs a control for rotating the optical disk at a constant rpm, and the sled motor driver 40 independently performs a function of freely moving the optical pickup bundle during the search. do. For example, in order for the spindle motor 10 to rotate the optical disk in a constant angular velocity (CAV) manner, the spindle motor driver 20 must continuously perform the control at a predetermined cycle to maintain a constant angular velocity of the optical disk. When the sled motor driver 40 seeks a long distance search by the rotation of the sled motor 30, the sled motor driver 40 must continuously perform driving control to move the optical pickup to the inner and outer circumference independently of the spindle motor driver 20. do.

Typically, the most current consuming building blocks in a CD-ROM driver are the spindle motor driver system and the sled motor driver system. Thus, when both of these driver systems are operating at the same time, the current of the CD-ROM driver will record the peak. Especially in notebook CD-ROM drivers that require low power consumption, blocking these peak currents is an important issue.

Accordingly, the present invention has been made to solve such a problem, and in the optical disk device, when the sled motor is driven while the spindle motor is being driven, the sled motor is prevented from getting the most load. When driving a red motor, it is an unnecessary time point that does not affect performance. Therefore, the spindle motor is left in a free-run state for a short time to reduce current consumption and to prevent voltage drop caused by sudden current consumption. It is an object of the present invention to provide a current control method of a spindle motor and a sled motor in an optical disk device capable of performing a stable operation.

1 is a block diagram illustrating an internal control apparatus of an optical disk apparatus according to the prior art.

2 is a flow chart showing a preferred embodiment of the current control method of the spindle motor and the sled motor in the optical disk device according to the present invention.

In the optical disk device according to the present invention for achieving the above object, the current control method of the spindle motor and the sled motor, in the optical disk device, the data on the recording data of the optical disk while controlling the rotation of the spindle motor through the spindle motor driver After detecting that a data seek request is applied, cut off the current applied to the spindle motor, and drive the sled motor through the sled motor driver to perform the search process to move the optical pickup to a desired position. When the data search is completed by the drive of the sled motor, the current is applied to the spindle motor again to control the rotation of the spindle motor to reduce the current consumption and to prevent the voltage drop caused by the rapid current consumption. It is characterized by the ability to perform .

Hereinafter, a preferred embodiment of the current control method of the spindle motor and the sled motor in the optical disk device according to the present invention will be described with reference to the accompanying FIG.

1 is a flow chart showing a preferred embodiment of the current control method of the spindle motor and the sled motor in the optical disk device according to the present invention.

A preferred embodiment of the current control method of the spindle motor and the sled motor in the optical disk apparatus according to the present invention, as shown in Figure 1, in the optical disk reproducing apparatus, in the optical disk apparatus, the spindle motor driver (spindle motor driver) Detecting whether a data seek request for recording data of the optical disc is applied while controlling the rotation of the spindle motor through the step S10;

Blocking the current applied to the spindle motor when the data search request is detected (S20);

When the current of the spindle motor is cut off, an optical pick-up is moved to a desired position by driving a sled motor through a sled motor driver to perform a search process. Step S30;

Checking whether the driving of the sled motor is completed (S40); And

As a result of the inspection, when the data search is completed by the driving of the sled motor, the step of applying the current to the spindle motor again to control the rotation of the spindle motor (S50).

The operation of the preferred embodiment of the current control method of the spindle motor and the sled motor in the optical disk device according to the present invention configured as described above will be described in detail with reference to FIG. 1.

The present invention focuses on the fact that the data recorded on the optical disc cannot be read when the optical pickup is moved due to the rotation of the sled motor, and the rotational control of the spindle motor becomes meaningless during the movement of the optical pickup, thus consuming unnecessary current. In this case, there is a subject of the invention to cut off an unnecessary current applied to the spindle motor.

First, in step S10, it is detected whether a data seek request for recording data of the optical disc is applied while controlling the rotation of the spindle motor through a spindle motor driver.

In operation S20, when the data search request is detected, a current applied to the spindle motor is blocked. When the current applied to the spindle motor is cut off, the spindle motor is normally free-run.

When the current of the spindle motor is cut off, in step S30, a sled motor is driven by a sled motor driver to perform a search process, whereby an optical pick-up is desired. Move to.

Finally, in step S40, it is checked whether the driving of the sled motor is completed. When the data search is completed by driving of the sled motor as a result of the inspection, in step S50, current is again applied to the spindle motor. By controlling the rotation of the spindle motor to reduce the current consumption, there is an advantage that can perform a stable operation as a whole by preventing the voltage drop due to rapid current consumption. In fact, when driving an optical disc device, such data read and seek operations occur very frequently. In this case, the present invention can save a lot of current consumption. On the other hand, the present invention can be easily applied to all optical disk devices using the spindle motor and the sled motor, and it is expected that the present invention can be easily modified and applied to other devices having similar structures.

Terminologies used herein are terms defined in consideration of functions in the present invention, which may vary according to the intention or customs of those skilled in the art, and the definitions should be made based on the contents throughout the present application. will be.

Although specific embodiments of the invention have been described and illustrated, it will be apparent that the invention may be embodied in various modifications by those skilled in the art.

In addition, since the present invention has been described through the preferred embodiment of the present invention, in view of the technical difficulty aspects of the present invention, those having ordinary skill in the art can easily be different from another embodiment of the present invention. As modifications may be made, it is obvious that both the embodiments and modifications cited in the above description belong to the appended claims.

As described in detail above, in the optical disk device, after detecting that a data seek request for recording data of the optical disk is applied while controlling the rotation of the spindle motor through the spindle motor driver, In order to cut off the applied current and drive the sled motor through the sled motor driver to move the optical pickup to the desired position to perform the searching process, when the data searching is completed by the drive of the sled motor, the current is transmitted to the spindle motor. According to the present invention to control the rotation of the spindle motor by applying again, there is an advantage that can not only reduce the current consumption but also prevent the voltage drop due to rapid current consumption to perform a stable operation as a whole.

Claims (1)

In the optical disk device, Detecting whether a data seek request for recording data of the optical disc is applied while controlling the rotation of the spindle motor through a spindle motor driver; Blocking a current applied to the spindle motor when the data search request is detected; When the current of the spindle motor is cut off, an optical pick-up is moved to a desired position by driving a sled motor through a sled motor driver to perform a search process. Steps; Checking whether driving of the sled motor is completed; And And, when the data search is completed by driving the sled motor, controlling the rotation of the spindle motor by applying a current to the spindle motor again, thereby controlling the spindle motor and the sled. How to control the current of the motor.