JPH08194950A - Optical disk drive unit - Google Patents

Abstract

PURPOSE: To record and reproduce data quickly by protecting the data recording face on an optical disc even when the recording or reproducing operation is waited while irradiating the optical disc with laser light. CONSTITUTION: A drive controller 7 determines a used test area of PCA on an optical disc 1 after starting the operation. Tracking and jumping back are repeated for the used test area and the operation is waited while irradiating the optical disc with laser light L from an optical pickup 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device which records and reproduces data by irradiating an optical disk with laser light.

[0002]

2. Description of the Related Art In recent years, an optical disk device such as a document filing device provided with means for irradiating an optical disk with a laser beam to record and reproduce data has been widely used. In such an optical disc apparatus, the laser beam is irradiated onto the optical disc while waiting for recording and reproducing of data on the optical disc.

However, when an optical disc having a recording surface on which data can be recorded (referred to as "CD-R disc") is mounted, when the laser beam is radiated while waiting for recording and reproduction of data on the optical disc, the There is a device (for example, refer to Japanese Patent Laid-Open No. 3-40235) that stops the irradiation of the laser beam onto the recording surface during data recording and reproduction standby because of the possibility of degrading the recording surface.

[0004]

However, in the above-mentioned optical disk device, since the irradiation of the laser beam to the recording surface is stopped during the data recording and the reproduction standby,
Every time there is a command to record or reproduce data, it is necessary to start laser light irradiation and initialize the servo system such as focus pull-in and track pull-in. There is a problem that recording and reproduction cannot be performed quickly.

The present invention has been made in view of the above points, and prevents the recording surface on the optical disc for recording data from being deteriorated even when standing by while irradiating the laser beam during the data recording and reproducing standby. , The purpose is to enable quick recording and reproduction of data.

[0006]

In order to achieve the above-mentioned object, the present invention provides an optical disk device equipped with means for irradiating a laser beam onto the optical disk to record and reproduce data, and after the start, the above-mentioned optical disk There is provided means for discriminating a used test area of the PCA and means for repeatedly performing tracking and jumpback with respect to the used test area discriminated by the means and waiting for irradiation with laser light.

Further, in the above optical disk device, a means for determining whether or not the optical disk is a recordable disk at the time of start-up, and a servo is driven when the means determines that the optical disk is not a recordable disk. In this state, it is preferable to provide a means for standing by while irradiating the laser beam to an arbitrary position on the optical disc.

Further, in the above-mentioned optical disc device, a means for discriminating the used test area of the PCA on the optical disc after the start-up and a tracking and a jump back for the used test area discriminated by the means are repeatedly performed. Means to wait while irradiating with laser light, a means to stop irradiation of laser light to the optical disk after activation and wait, and select whether to wait with irradiation of the laser light or stop irradiation and wait. It is advisable to provide selection means for

Further, it is more preferable that the selecting means is a means for selecting whether to stand by while irradiating the laser beam or to stop the irradiation and stand by based on the command received through the host interface.

[0010]

The optical disk device according to the present invention discriminates the used test area of the PCA on the optical disk after starting, repeats the tracking and jumpback to the used test area, and waits while irradiating the laser beam. Therefore, while waiting for data recording and playback, there is no problem even if it deteriorates.Wait while irradiating only the used test area with laser light and wait without irradiating laser light to the recording surface for recording data. can do.

Therefore, when a command for recording or reproducing data is issued, it is not necessary to newly start the irradiation of laser light and initialize the servo system such as focus pull-in and track pull-in. It is possible to quickly shift from the standby state to the data recording or reproduction.

Further, at the time of start-up, it is determined whether or not the optical disc is a recordable disc, and when it is determined that the disc is not a recordable disc, laser light is emitted to an arbitrary position on the optical disc while the servo is driven. If the optical disc dedicated to the reproduction of the prerecorded data is mounted, there is no risk of deterioration even if the laser beam is radiated during the standby state. You can wait at any position on the disc. Therefore, it is possible to wait at the position where the average distance when seeking the data recorded on the optical disc is the smallest, and the data reproduction time can be shortened.

Further, after the start-up, the used test area of the PCA on the optical disc is discriminated, and the used test area is repeatedly tracked and jumped back to wait for the laser beam to be irradiated. By selecting either of stopping the laser beam irradiation to the optical disk and making it stand by, it is possible to shorten the data recording and reproducing time by making the optical disk stand by while the laser beam is being irradiated. Whether to give priority to reducing the power consumption of the laser light emission and the servo control by stopping the laser light irradiation and standing by, and suppressing the heat generation of the optical disk due to the laser light irradiation. It can be freely selected according to the system situation.

If the selection is made based on the command received via the host interface, the optical disc is kept waiting while the laser beam is being radiated to shorten the data recording and reproducing time. Whether to give priority to reducing the power consumption of laser light emission and servo control by stopping laser light irradiation and waiting, and suppressing heat generation of the optical disk due to laser light irradiation. The system is free to choose.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an optical disk device according to an embodiment of the present invention. This optical disk device includes a motor 2 that rotates an optical disk 1 that is an information recording medium that records various data, and a rotation control system 3 that controls the number of rotations of the motor 2.

Further, an optical pickup 4 for irradiating the recording surface of the optical disc 1 with a laser beam L generated by a semiconductor laser, an actuator control system 5 for moving the optical pickup 4 in the radial direction of the optical disc 1, and an optical pickup 4 are provided. The signal detection part 6 which detects a signal is provided.

Further, based on a command from a host computer (host system) connected via an external interface (I / F) (not shown), a rotation control system 3 at the time of start-up and data recording / reproduction, an actuator. A drive controller 7 having a built-in CPU for controlling the control system 5 and the servo system such as the laser drive circuit 9 and for performing the control process in the standby state for recording and reproducing data according to the present invention with respect to the optical disc 1 is provided. .

Further, a ROM which is a storage area used when the drive controller 7 performs various processes,
A memory 8 such as a RAM and a laser drive circuit 9 for controlling the irradiation of the laser light L of the optical pickup 4 by the optimum recording output value sent from the drive controller 7 are also provided. Furthermore, the drive controller 7 switches between performing the control processing during standby for recording and reproduction of data according to the present invention or the control processing during standby for normal recording and reproduction of data on the optical disc 1. There is also a switch 11 for.

This optical disc device performs various initialization operations of the servo system for recording and reproducing data on the optical disc 1 at the time of start-up, and after the initialization operation, commands for recording and reproducing data are issued from the host computer. During standby until reception, the control processing during standby for data recording and reproduction according to the present invention and the control processing during standby for normal data recording and reproduction based on switching by the switch 11 or a command from the host computer Do either.

When recording data on the optical disc 1, when the rotation control system 3 drives the motor 2 to rotate the optical disc 1 according to an instruction from the drive controller 7, the instruction is first sent to the actuator control system 5. The optical pickup 4 is moved so that the control track of the optical disc 1 is irradiated with the laser light L, and a signal corresponding to the reflected light is detected by the signal detection unit 6 and sent to the drive controller 7.

Then, the drive controller 7 sends the optimum recording output value corresponding to the signal to the actuator control system 5 to move the optical pickup 4, while the laser driving circuit 9 operates according to the optimum recording output value set by the drive controller 7. The recording surface of the optical disc 1 is irradiated with the laser beam L to record various data.

When reproducing the data recorded on the optical disk 1, the laser drive circuit 9 irradiates the laser light L from the optical pickup 4 with the reproduction output value from the drive controller 7 and responds to the reflected light. The signal detector 6 detects a signal and sends it to the drive controller 7 to reproduce various data.

FIG. 2 is an explanatory diagram showing a radial layout of a multi-session type CD-R disc, which is a type of the optical disc 1 on which data can be additionally recorded. FIG. 3 is an explanatory diagram showing the format of the PCA (Power Calibration Area).

As shown in FIG. 2, a plurality of sessions are defined on the CD-R disc, and PCA and PMA (Program Memory Area) are provided at the front of the sessions.
) Each area. Each session has a lead-in area and a lead-out area at the beginning and the end, respectively. Tracks are sandwiched between the lead-in area and the lead-out area. (Trac
k) is. For example, in session 1 shown in FIG. 2, lead-in, track 1, track 2, and lead-out are formed in this order.

The PMA is an area for recording track information of all tracks on the CD-R disc over each session, and the lead-in of each session is track information of all tracks in each session.
This is an area for recording OC (Table of Contents). Therefore, the TO recorded in the lead-in in the session
By reading C, the position of each track can be known as session information within the session.

As shown in FIG. 3, the PCA is composed of a test area (Test Area) and a count area (Count Area). The test area is a test writing area for adjusting the power at the time of writing data, and is divided into 100 test writing areas, one partition for each power calibration performed by the recorder. use.

The count area is an area for recording data indicating the used partition of the test area,
It is divided into 100 partitions like the test area, and records data indicating that the partition has been used in a partition corresponding to the used partition in the test area. That is, each partition in this count area corresponds to an address indicating the position of a used partition in the test area.

For example, the tenth area in the test area in FIG.
When the 0th and 99th partitions are used (indicated by hatching in the figure), data is recorded in the 100th and 99th partitions in the count area. That is, the partition in the test area corresponding to the number of the partition in which the data in the count area is recorded is already used.

In this way, the drive controller 7
By the control of (1), each time the recorder uses the partition of the test area, the data indicating the used is recorded in the partition of the count area indicating the used partition of the test area.

Therefore, the drive controller 7 is
When waiting for recording and reproduction of data without stopping the laser beam L, by referring to each partition in the count area of the above PCA and determining the used partition (used test area) in the test area, A used partition is searched for, and control of the servo system for waiting while the partition is irradiated with the laser beam L is executed.

In the above CD-R disc, 1
Power calibration cannot be performed more than 100 times. In addition, the front and rear parts of the test area of the PCA and the rear part of the count area are used to search the start position of 100 partitions, the start position of the count area, and the start position of the PMA, respectively. And not used to record used data.

Next, a standby process for recording and reproducing data in the optical disk device of this embodiment will be described. (1) Control processing for waiting for data recording and reproduction according to the invention of claim 1 FIG.
2 is a flowchart showing a control algorithm when executing data recording and reproduction standby according to the invention of claim 1.

After starting, as shown in FIG. 4, in step (indicated by "S" in the figure) 1, the count area of the PCA is read,
Go to step 2 to determine whether or not there is a used test area, and if not, proceed to step 7 to laser beam L
The irradiation of No. 1 is stopped, and the process proceeds to Step 8 to judge whether or not there is an interrupt.

Then, the waiting loop is repeated until an interrupt occurs, and if there is an interrupt during that time, the process proceeds to the interrupt processing. That is, in step 2, it is determined whether or not there is a used partition in the test area, and if there is no used partition, a control process of stopping the irradiation of the laser beam L and waiting is performed.

On the other hand, if it is determined in step 2 that there is a used test area, step 3 is entered to check the start address and the trailing end address of the used test area, and step 4 is entered to find the used test area. It jumps by tracking to the head address of the area, and proceeds to step 5 to judge whether or not the rear end address has been reached, irradiate the used test area with the laser beam L and wait until the rear end address is reached. Repeat the waiting loop.

When the rear end address is reached, the routine proceeds to step 6, where it is judged whether or not there is an interrupt. If there is no interrupt, the routine returns to step 5 and again from the top address to the rear end address of the used test area. The standby loop process is performed, and if there is an interrupt, the process proceeds to the interrupt process.

That is, if there is a used partition in the test area in step 2, the head and the rear end of the used partition are examined, and the laser beam L is applied to all the partitions from the head to the rear end. The control process of irradiating and waiting is performed, and the process is repeated until an interrupt occurs.

In this way, when waiting for data recording and reproduction, the laser beam L is radiated only to the already used portion of the data recording surface to wait, so that even if the used portion is deteriorated There is no problem, and the recording surface on which data is to be recorded is not irradiated with the unnecessary laser light L, so that it does not deteriorate.

Further, since it is not necessary to stop the irradiation of the laser beam L even in the standby state, the recording or reproducing can be executed immediately when the command for recording or reproducing the data is issued. Further, when there is no used test area, the irradiation of the laser beam L is stopped and the optical disk 1 is waited for.
It is possible to prevent the deterioration of the recording surface.

(2) Control processing for waiting for data recording and reproduction according to the invention of claim 2 FIG. 5 shows a control algorithm when the drive controller 7 executes the waiting for data recording and reproduction according to the invention of claim 2. It is a flow chart, and the description of the portions common to FIG. 4 will be omitted.

As shown in FIG. 5, at the time of start-up, the processing in this case is whether the optical disk 1 mounted in the optical disk device at step (indicated by "S" in the figure) 11 is a CD-R which is a data recordable disk. If it is a CD-R, the same processing as the processing shown in steps 2 to 8 of FIG. 4 is performed in steps 12 to 19. If it is not CD-R in the judgment in step 11, the process proceeds to step 19 and stands by while irradiating the laser beam L at an arbitrary position with respect to the optical disk 1, and if there is an interrupt during the stand-by, shifts to the interrupt process. .

That is, when the CD-R is mounted and there is a used test area, a process of irradiating the used test area with the laser beam L and waiting is performed, and there is no used test area. In this case, the process of stopping the irradiation of the laser beam L and waiting is performed. Also CD
If it is not −R, the process of waiting at an arbitrary position is performed while the normal laser light L is irradiated.

In this way, it is determined whether or not the optical disc 1 loaded at the time of startup is a data recordable disc,
If the disc on which data can be recorded has a used test area, the laser beam L is irradiated only to the used test area to wait when the recording and reproduction of data after the start-up is performed.

If there is no used test area on the data recordable disc, the laser beam L irradiation is stopped to stand by when the data recording and reproducing after the start-up is performed. In the case of a disc that cannot be used, when the data recording / reproduction after the start-up is performed, the process is automatically switched to perform a process of waiting while irradiating the laser beam L at an arbitrary arbitrary position.

Therefore, in the case of a disc in which data cannot be recorded, there is no fear of deterioration even when the laser beam is still radiated, and it is not necessary to perform the process of radiating the laser beam only to the used test area and waiting. The start-up time can be shortened as much as no processing is performed. Furthermore, it is possible to wait at a position where the average distance when seeking the data recorded on the optical disk is the smallest, and the data reproduction time can be shortened.

(3) Control processing for waiting for data recording and reproduction according to the invention of claim 3 FIG. 6 shows a control algorithm when the drive controller 7 executes the waiting for data recording and reproduction according to the invention of claim 3. It is a flow chart, and the description of the portions common to FIG. 5 will be omitted.

In the process in this case, the switch 1 is activated at step (indicated by "S" in the figure) 21 as shown in FIG.
It is determined whether or not 1 is a laser beam stop standby mode in which the laser beam irradiation is stopped and the laser beam standby state stands by. Then, when the laser beam stop standby mode is switched during the data recording and reproduction standby, the process proceeds to step 29 and the laser beam L
Stop irradiation and wait. Further, when the mode is switched to the standby mode by using the used test area, steps 22 to 30 are followed by steps 12 to 19 of FIG.
The same process as the process shown in is performed.

That is, when the switch 11 is set in the laser light irradiation stop mode, the process of stopping the irradiation of the laser light L and waiting is performed, and the switch 11 waits using the used test area. When the mode is switched to and the CD-R is mounted and there is a used test area, the laser beam L is irradiated only to the used test area and the process of waiting is performed.

Further, when the switch 11 is switched to a mode in which the used test area is used for waiting, and when there is no used test area, the irradiation of the laser beam L is stopped to perform the waiting process, and the CD- If it is not R, the process of waiting at an arbitrary position while the normal laser light L is being irradiated is performed.

In this way, the operator arbitrarily switches the switch 11 in accordance with the situation of each system, thereby performing the process of stopping the laser beam L and waiting, and the process of waiting by using the used test area. It can be switched.

Therefore, by switching the switch 11, priority is given to shortening the recording and reproducing time of data by waiting while the laser light L is being irradiated onto the optical disk 1, and the irradiation of the laser light L is stopped. It is possible to freely select to give priority to reducing the light emission of the laser light L and the power consumption required for the servo control and suppressing the heat generation of the optical disc 1 due to the irradiation of the laser light L.

(4) Control processing for waiting for data recording and reproduction according to the invention of claim 4 FIG. 7 shows a control algorithm when the drive controller 7 executes the waiting for data recording and reproduction according to the invention of claim 4. It is a flow chart, and the description of the portions common to FIG. 5 will be omitted.

As shown in FIG. 7, the processing in this case is performed by a command setting from the host computer in step (shown by "S" in the figure) 31 at the time of start-up. It is determined whether the mode is set. Then, when the laser beam stop standby mode is switched to during the data recording and reproduction standby, the process proceeds to step 39 to stop the irradiation of the laser beam L and stand by. Further, when the mode is switched to the standby mode using the used test area, the same processing as the processing shown in steps 12 to 19 of FIG. 5 is performed in steps 32 to 40.

That is, when the command received from the host computer is an instruction to switch to the laser light irradiation stop mode, the processing of stopping the laser light L irradiation and standing by at the time of waiting for data recording and reproduction is performed. Receives a command to switch to the standby mode using the used test area, and when the CD-R is mounted and has a used test area, only the used test area is irradiated with the laser beam L. Perform the process of waiting.

When a command for switching to the standby mode using the used test area is received, and when there is no used test area, the irradiation of the laser beam L is stopped and the standby processing is performed, which is not the CD-R. In this case, the process of waiting at an arbitrary position while the normal laser light L is being irradiated is performed.

In this way, the priority is given to the fact that the host computer waits while irradiating the optical disk 1 with the laser beam L to shorten the data recording and reproducing time according to the situation of each system. , Laser light L
It is possible to freely select to give priority to reducing the power consumption for the emission of the laser light L and the servo control by stopping the irradiation of the laser beam L and waiting, and suppressing the heat generation of the optical disc 1 due to the irradiation of the laser beam L. .

[0057]

As described above, according to the optical disk device of the present invention, the recording surface for recording data on the optical disk is not deteriorated even if the optical disk device stands by while irradiating the laser beam during the data recording and reproducing standby. In addition, when a data recording / reproducing command is issued, data recording / reproducing can be performed quickly. Therefore, during start-up, data recording and reproduction can be processed in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a radial layout of a multi-session type CD-R disc used in the optical disc apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a format of PCA on the CD-R disc of FIG. 2.

FIG. 4 is a flowchart showing a control algorithm when the drive controller 7 of FIG. 1 executes a data recording and reproduction standby according to the invention of claim 1;

FIG. 5 is a flowchart showing a control algorithm when the drive controller 7 of FIG. 1 executes a data recording and reproduction standby according to the invention of claim 2;

FIG. 6 is a flowchart showing a control algorithm when the drive controller 7 of FIG. 1 executes the standby of data recording and reproduction according to the invention of claim 3;

FIG. 7 is a flowchart showing a control algorithm when the drive controller 7 of FIG. 1 executes a data recording / reproducing standby according to the invention of claim 4;

[Explanation of symbols]

 1: Optical disc 2: Motor 3: Rotation control system 4: Optical pickup 5: Actuator control system 6: Signal detection unit 7: Drive controller 8: Memory 9: Laser drive circuit 11: Switch L: Laser light

Claims (4)

[Claims] 1. An optical disk apparatus comprising means for irradiating a laser beam onto an optical disk to record and reproduce data, a means for determining a used test area of a PCA on the optical disk after starting, and the means. An optical disk device comprising: means for repeatedly performing tracking and jumpback on a used test area determined by the above, and waiting for laser light irradiation. 2. An optical disk device comprising means for recording and reproducing data on an optical disk, means for judging whether or not the optical disk is a recordable disk at start-up, and means for judging that the disk is not a recordable disk. And a means for standing by while irradiating a laser beam to an arbitrary position on the optical disk while the servo is driven. 3. An optical disk device comprising means for recording and reproducing data on an optical disk, means for determining a used test area of PCA on the optical disk after starting, and a used test determined by the means. Means for repeating the area tracking and jumping back to wait while irradiating the laser beam, waiting means for stopping the irradiation of the laser beam to the optical disk after starting, and waiting or irradiating the laser beam And an selecting unit for selecting whether to stop and wait. 4. The optical disk device according to claim 3, wherein the selecting means selects whether to wait while irradiating the laser light or to wait by irradiating the laser light based on a command received through the host interface. An optical disk device characterized by a means.