KR19990042097A - How to adjust the speed of the optical disc drive - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

A technology related to the speed of an optical disc drive.

I. The technical problem that the invention is trying to solve

The speed can be adjusted by the user, and when the user judges that the information reproducing operation of the optical disc drive is unstable due to external noise or vibration, the user arbitrarily sets the speed of the optical disc drive and plays the information of the optical disc as stably as possible. .

All. Summary of the Solution of the Invention

In the optical disc drive, a user inputs an arbitrary speed through a predetermined input device, sets a mode for operating at an arbitrary speed set by the user, and operates under an arbitrary speed input by the user in setting the mode.

la. Important uses of the invention:

It is used to arbitrarily set the speed of the optical disc drive by the user.

Description

How to adjust the speed of the optical disc drive

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc drive (hereinafter also referred to as a drive), and more particularly, to a method of controlling a speed of an optical disc drive.

In the optical recording and reproducing technique of recording and reproducing information on an optical disc (hereinafter referred to as a disc) by using a laser, information is read as an amount of change of laser beam reflected light with respect to the optical disc. The method of recording the data on the optical disk by changing the reflected light includes a method of using the interference between the pit and the reference plane by forming a concave pit on a disk substrate such as a ROM (Read Only Memory) disk used only for reproduction; A method of changing the polarization direction of a magneto-optical recording medium such as a magneto-optical disk, and a method of using the difference in reflected light amount depending on the crystallizing state of the recording material, such as a phase-change disk (CD-RW). And a method by modifying an organic pigment such as CD-R (CD-Recordable). The above methods are widely applied to CDs (Compact Discs) and DVDs (Digital Video Discs or Digital Versatile Discs). Accordingly, optical discs and optical disc drives can be classified into various types.

On the other hand, all of the above optical disc drives include a loading / unloading mechanism of the optical disc, a spindle motor for rotating the optical disc, and a drive electronic circuit unit for reproducing information from the optical disc under the control of the control unit. It includes a control unit. The control unit manages the flow of commands, the status of various flags, and the transfer of information between the host and drive electronic circuitry, such as personal computers.

In the operation of reproducing the information recorded on the optical disc, the optical disc drive controls the spindle motor at high speed at constant linear velocity (CLV) or constant angular velocity (CAV), and accordingly on the optical disc rotating at high speed. The digital information recorded in the readout is read in the form of a radio frequency (RF) signal using an optical pickup. The high frequency signal is then converted into reproduction data through various signal processing processes.

On the other hand, in the optical disk drive, the rotational speed of the spindle motor is made high, and accordingly, the reproduction high frequency signal can be processed to increase the reproduction speed of information. In practice, however, the higher the rotational speed of the spindle, the greater the influence of the disc's defect, eccentricity, and deflection. Therefore, the tracking servo, the track search and tracking control of the optical pickup, and the laser light focus control of the optical pickup, Focus servo becomes difficult, which makes it difficult to reproduce correct data. Current technology is in the process of commercializing a drive whose spindle speed is 32x (1x is about 216rpm, 8x is 8x216rpm, ... 32x is 32x216rpm).

In the high speed drive, information is reproduced from the disc. When the initial information is reproduced, the high speed drive reproduces the information at the highest speed supported by the current drive. When the information is not reproduced normally at the maximum speed, the speed is further lowered. This will be described in more detail with an example of a 32x speed drive, where a 32x speed drive first plays back information by rotating the spindle motor at 32x speed when playing information on a disc. If the information is not played back normally, the speed is lowered to 16 times, for example. This is because the disk rotates more slowly, so that the influence of eccentricity and deflection is reduced, and the information is reproduced more reliably, for example, the servo control becomes more stable. On the other hand, if the information is not normally played back even at the rotational speed of the 16-speed spindle motor, the speed is lowered to 8 times speed, for example. It is considered inoperable.

On the other hand, in the disc information reproducing operation of the optical disc drive as described above, for example, the drive at 32x speed is controlled to be controlled at three speeds of 32x, 16x, and 8x speeds. Therefore, there may be a slight difference in the step of dividing properly from the highest speed to the lowest speed. In addition, in general, the drive can control the speed by 1x, but the reason for controlling the speed only in a few steps as described above is that the drive of the 32x speed, for example, from 32x to 1x speed to read the information of the disc If the playback operation is performed sequentially in step 32, there is a problem that the operation execution time becomes too long.

On the other hand, in the case where the drive performs the information reproducing operation on the disc containing information important to the user, it may be important for the user to reproduce the information even if it takes some time. However, in the information reproducing method of the drive as described above, the drive collectively sets the speed and judges that disc information cannot be reproduced at an arbitrary minimum level, so that the user has a lower speed than the minimum level information of the disc containing important contents. In spite of this, even if it can be reproduced, there is an inconvenience that the information on the disc is not available due to the batch processing of the drive.

Accordingly, an object of the present invention is to provide a method of adjusting the speed of an optical disk drive, which may be controlled by a user.

Another object of the present invention is to provide a method of controlling the speed of an optical disk drive that can be adjusted up to a minimum speed by a user so as to stably reproduce information of the optical disk.

Another object of the present invention is to provide a speed control method of an optical disc drive that can arbitrarily set the speed of the optical disc drive by the user when the user determines that the information reproducing operation of the optical disc drive is unstable due to external noise or vibration.

In order to achieve the above object, the present invention provides an optical disc drive, wherein a user inputs an arbitrary speed through a predetermined input device, sets a mode for operating at an arbitrary speed set by the user, and sets the mode when the user sets the mode. It operates under a random speed input by the.

1 is a schematic structural diagram of an example of an optical disk drive according to an embodiment of the present invention;

2 is a control flowchart of a microcomputer in a speed control process of an optical disk drive according to an embodiment of the present invention.

3 is an external perspective view of an optical disk drive according to an embodiment of the present invention;

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific items such as components of the display unit, up keys, and down keys are shown, which are provided to help a more general understanding of the present invention, and these specific items may be modified or changed within the scope of the present invention. It will be apparent to those skilled in the art.

1 is a schematic configuration diagram of an example of an optical disk drive according to an embodiment of the present invention, taking a DVD-ROM drive as an example. 1, the information recorded on the optical disc 10 is reproduced by the optical pickup 14 in the optical disc drive.

The optical pickup 14 optically picks up the information recorded on the data recording surface of the optical disk 10 (in the example, a DVD-ROM disk) rotated by the spindle motor 12, converts it into an electrical signal, a high frequency (RF) signal, and an RF amplifier. 20 is applied. The optical pickup 14 is supported by the transfer motor 26 and is movable in the inner and outer directions of the optical disc 10. The RF amplifier 20 amplifies the RF signal applied from the optical pickup 14, removes the noise and distortion of the amplified signal by the waveform equalization circuit, and applies the waveform-shaped RF signal to the DSP 30. The RF amplifier 20 applies signals for the focus servo and the tracking servo, that is, a focus error signal (FE) and a tracking error signal (TE) to the servo signal processor 22. The servo signal processor 22 outputs a control signal for focus servo, a control signal for tracking servo, and the like to the servo driver 24 based on the focus error signal and the tracking error signal. The servo driver 24 supplies the optical pickup 14 and the transfer motor 26 based on various control signals applied from the servo signal processor. Apply operating power for tracking servo and focus servo.

On the other hand, the DSP 30 decodes the RF signal applied by the RF amplifier 20, performs error correction on the decoded data, and applies it to the interface unit. In addition, the DSP 30 applies the spindle motor drive control signal to the spindle motor driver 28 to control the spindle motor driver 28 to drive the spindle motor 12. The interface unit 34 interfaces various control signals applied between the host computer, such as a personal computer, and the drive, and outputs data applied through the DSP 30 to the host computer. The DRAM 36 is used as a memory for the transfer data buffer of the interface unit 34, and the SRAM 32 is used as an error correction memory of the DSP 30.

The microcomputer 40 is connected to a memory 42 including a ROM for storing control programs for performing various operations and a RAM for temporarily storing various data required for or performing an operation. Overall control of the drive's overall operation.

On the other hand, the control program stored in the memory 42 is additionally input a program that operates by adjusting the speed based on the user's input in accordance with the features of the present invention. In addition, according to an aspect of the present invention, a key input unit 50 for a user to input an arbitrary speed, and a display unit 52 for displaying a current speed, are connected to the microcomputer 40.

Hereinafter, an operation of an optical disk drive having the above configuration will be described in detail with reference to the accompanying drawings. 2 is a control flowchart of the microcomputer 40 of the speed control process of the optical disk drive according to an embodiment of the present invention. First, in step 60, the microcomputer 40 determines whether a speed change mode switching key is input. The double speed mode switching key is provided to the key input unit 50 as shown in FIG. 1 according to the feature of the present invention, and the speed setting operation mode (hereinafter, referred to as an automatic mode) of a conventional general drive itself and the features of the present invention. This key is for switching the speed setting operation mode (hereinafter, referred to as manual mode) by the user. When the speed mode switching key is input by the user, the microcomputer 40 proceeds to step 62 to switch the current speed mode. That is, if the current speed mode was the automatic mode, the mode is changed to the manual mode, and if the manual mode is the manual mode, the mode is changed to the automatic mode. Thereafter, in step 64, if the current mode is the automatic mode after checking the converted mode, the process proceeds to step 66. Then, the conventional drive self speed setting operation is performed. If the current mode is the manual mode, the process proceeds to step 66. Manual mode operation according to the characteristics of the invention is performed. When operating in the initial manual mode, the speed is set to be the maximum speed, the minimum speed, or a proper speed within the range. In step 68, the microcomputer 40 waits for a key input by the user. If there is a key input by the user, the process proceeds to step 70. If the key input is the input of the speed mode switching key, the mode is switched back to step 66. Proceed to check whether the input key is an up key or a down key. The up key or the down key is provided to the key input unit 50 as shown in FIG. 1 in the same manner as the speed mode switching key, and is a key for setting the speed of the drive by the user. If the down key is input by the user, the microcomputer 40 sets the speed at 1x if the current speed is not the lowest speed in steps 74 and 76, and proceeds to step 82. On the other hand, if the key input in step 72 is the up key, the microcomputer 40 proceeds to step 82 and increases the speed by 1x when the current speed is not the maximum speed in steps 78 and 80. The lowest speed may be preset at, for example, 1x speed, and the highest speed may be, for example, 32x as the highest speed supported by the drive. Thereafter, in step 82, the microcomputer 40 displays the changed and set speed in the above-described process on the display unit 52 as shown in FIG. 1 and returns to step 68 to repeat the above processes. The display unit 52 is provided with two seven segment displays, and can be configured to display a user's double speed from 1 to 32 as in the above example.

In the above-described process, the microcomputer 40 performs an operation of receiving an arbitrary speed setting set by the user according to the characteristics of the present invention, and subsequently reproduces the information recorded from the optical disc 10 at the speed set by the above process. Will perform the action.

Meanwhile, FIG. 3 illustrates each key of the key input unit and the actual appearance of the display unit. 3 is an external perspective view of an optical disk drive according to an embodiment of the present invention. Referring to FIG. 3, an arrow direction is a front portion of a drive, and when a drive is built in a host computer, an operation operation by a user is performed. It is the surface exposed to the outside of the host computer so that it can be lost. The front part is generally provided with a tray 54 for loading a disc, a play key 56, an indicator lamp 58 and the like. In an embodiment of the present invention, a front panel portion includes a key input unit 50 provided with a double speed mode switching key and an up and down key according to the present invention, and a display unit 52 including a 7 segment display.

Meanwhile, in one embodiment of the present invention as described above, the up key and the down key are provided to change the speed by the user. However, the present invention focuses only on lowering the speed, so only the down key is provided to operate only to decrease the speed. It can also be configured. In addition, in one embodiment of the present invention as described above, when changing the speed by the user, the speed is increased or decreased by 1 times, but may be configured to increase or decrease by 2 times or 3 times.

In addition, in the above-described embodiment of the present invention, the key input unit 50 and the display unit 52 are separately configured in the drive itself. In another embodiment of the present invention, the firmware program for performing the operation according to the above-described features of the present invention is a drive. It is provided on its own and provides an operation performing program for operating such a program in the form of a library to a drive control program of a host computer such as a personal computer, so that the drive interfaces with the host computer to host an operation related to the key input unit 50. It may be performed in association with a predetermined function key of the computer's keyboard, and the present double speed displayed on the display unit 52 may be displayed on a monitor of the host computer or the like.

As described above, various changes and substitutions within the scope including the characteristic topology according to the present invention will be easy for those skilled in the art.

As described above, the present invention provides an optical disc drive, wherein a user inputs an arbitrary speed through a predetermined input device, sets a mode for operating at an arbitrary speed set by the user, and inputs the user by setting the mode. Since it operates under the specified random speed, the speed can be switched by the user, and when the user judges that the information reproducing operation of the optical disc drive is unstable due to external noise or vibration, the user can arbitrarily set the speed of the optical disc drive. The information can be reproduced as stably as possible.

Claims (8)

In the spindle motor speed control method of the optical disk drive, Receiving, by a user, any one speed within a range of speeds supported by the optical disc drive through a predetermined input device; And driving the spindle motor at the input double speed. The method of claim 1, And displaying the input double speed through a predetermined display device. The method of claim 2, wherein the display device comprises a seven segment display and is provided on a front portion of an outer case of the drive. The process of claim 1, wherein the inputting speed from the user is performed. Providing a speed control key to the front of the outer case of the drive to receive a speed control from the user; And increasing or decreasing the double speed by a predetermined step by an input of the double speed control key by the user. The method of claim 4, wherein the predetermined step is 1x speed. In the spindle motor speed control method of the optical disk drive, Providing a speed control key for receiving a speed control from a user on the front of the outer case of the drive; Increasing or decreasing the double speed by a predetermined step within the range of the double speed supported by the optical disc drive based on the input of the double speed control key by the user; Displaying the increased or decreased double speed through a predetermined display device; And driving the spindle motor at the increased or decreased double speed. The method of claim 6, wherein the display device comprises a 7-segment display and is provided on a front portion of an outer case of the drive. The method of claim 6, wherein the predetermined step is 1x speed.