JP2010092555A - Optical disk device and optical disk processing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve productivity in sequentially recording data on a plurality of optical disks using an optical disk device. <P>SOLUTION: When recording the data on the plurality of optical disks while the optical disk device is built in a duplicator etc., a system controller 32 determines whether a manufacturer ID (MID) of the optical disk to be recorded next matches the previous MID. When the MIDs match each other, it is determined whether the variation of optimal recording power by an OPC is within an allowable range. When it is within the allowable range, the OPC is skipped and physical format information etc. is pre-written in a control data zone. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus and an optical disc processing system, and more particularly to adjustment processing at the time of prewrite (prerecord).

  Techniques have been proposed for facilitating or simplifying various adjustments when recording data in an optical disc apparatus.

  For example, Patent Document 1 discloses that when the same optical disc is reused, the optimum light amount value corresponding to the serial number and manufacturer name in the control data is read from the EEPROM and the optimum light amount value is set. .

  Patent Document 2 discloses that trial writing is performed based on the standard recording power of standard data corresponding to ID data read from a disk.

  Japanese Patent Laid-Open No. 2004-228561 performs stepwise distinction between an inserted medium and a medium stored in a memory, that is, contents of medium management information read from a disk and contents held in the memory. It is disclosed that a necessary test writing process is selected according to the degree of matching.

  Further, in Patent Document 4, when the optimum recording power is detected, the optimum recording power value, the temperature information at that time, and the identification code of the optical disc are stored in association with each other, and the recording corresponding to the identification code read from the optical disc is recorded. It is disclosed that the temperature information and current temperature information are compared and the optimum recording power is detected when the temperature difference exceeds a predetermined value.

  Further, Patent Document 5 compares the temperature detected during the previous recording with the temperature during the current recording during the second and subsequent recordings on the same optical disc, and describes the range of the output stage where trial writing is performed based on this difference. It is disclosed that if the temperature is the same, the test power is not set and the previous power is set, the current temperature zone is recognized, and the output corresponding to the temperature zone within the output range of the recording laser power is disclosed. It is disclosed that test writing is performed only for the range.

JP-A-5-3346775 JP-A-8-73695 JP 2003-109222 A Japanese Patent No. 3035034 Japanese Patent Laid-Open No. 2000-222732

  On the other hand, when data is recorded on a DVD-R, physical format information, disk manufacturer information, etc. must be prewritten (prerecorded) or embossed recorded in the control data zone. The control data zone is composed of 192 ECC blocks (3072 sectors) starting from sector number 193024. Physical format information includes book format and part version, disc size and maximum transfer rate, disc structure, recording density, data area allocation, NBCA descriptor, start sector number of extended boundary zone, etc., when not embossed First, the optical disc apparatus prewrites these data in the control data zone. When pre-writing, since it is necessary to record data under optimum recording conditions, it is necessary to adjust the recording power to an optimum value.

  However, when the same data is continuously recorded on a relatively large number of optical disks, such as prewriters used in the production of optical disks, the optimum recording power is adjusted each time data is recorded on each optical disk. Then, there is a problem that it takes time and productivity is lowered.

  An object of the present invention is to provide an optical disc apparatus and an optical disc processing system capable of simplifying the adjustment operation of the optimum recording power when data is sequentially recorded on a plurality of optical discs, thereby improving productivity. .

  The present invention is an optical disc apparatus, wherein first determination means for determining whether or not a manufacturer ID of an optical disc on which data is to be recorded is the same as a manufacturer ID of an optical disc on which data has already been recorded, When it is determined by the determination means that they are the same, the second determination means for determining whether or not the variation in the optimum recording power is within the allowable range, and the second determination means determines that the variation is within the allowable range. In this case, the current optimum recording power is maintained as it is without executing the optimum recording power adjustment process, the data is recorded on the optical disk to be recorded, and the second judging means judges that the data is not within the allowable range. And a recording means for recording data on an optical disk on which data is to be recorded by executing an optimum recording power adjustment process.

  The present invention also provides an optical disc processing system comprising the above-described optical disc device and a transport mechanism for sequentially transporting unrecorded optical discs to the optical disc device and taking out and transporting recorded optical discs from the optical disc device.

  In addition, the present invention includes the above optical disk device and a printing unit that prints on a label surface of the optical disk, and continuously processes data recording in the optical disk device and label surface printing in the printing unit. An optical disc processing system is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the adjustment operation | work of the optimal recording power at the time of recording data on a some optical disk sequentially can be simplified, and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram of an optical disc apparatus according to the present embodiment. The optical disk 10 loaded by the disk tray is clamped by a magnet clamper (not shown), placed on the turntable, and rotated by a spindle motor (SPM) 12 together with the turntable. The spindle motor SPM 12 is driven by a driver 14, and the driver 14 is servo-controlled by a servo processor 30 so as to have a desired rotation speed.

  The optical pickup 16 includes a laser diode (LD) for irradiating the optical disk 10 with laser light and a photodetector (PD) that receives reflected light from the optical disk 10 and converts it into an electrical signal, and is disposed opposite to the optical disk 10. . The optical pickup 16 is driven in the radial direction of the optical disk 10 by a thread motor 18, and the thread motor 18 is driven by a driver 20. The driver 20 is servo-controlled by the servo processor 30 similarly to the driver 14. Further, the LD of the optical pickup 16 is driven by a driver 22, and the driver 22 is controlled by an auto power control circuit (APC) 24 so that the drive current is adjusted to a desired value. The APC 24 and the driver 22 control the light emission amount of the LD according to a command from the system controller 32. Although the driver 22 is provided separately from the optical pickup 16 in the figure, the driver 22 may be mounted on the optical pickup 16.

  When recording data on the optical disk 10, data to be recorded supplied from the system side as a host is supplied to the encode / decode circuit 36 via the interface I / F 40. The encode / decode circuit 36 stores data to be recorded in the buffer memory 38, encodes the data to be recorded, and supplies the data to the write strategy circuit 42 as modulated data. The write strategy circuit 42 converts the modulation data into a multi-pulse (pulse train) according to the recording strategy and supplies it to the driver 22 as recording data. Since the recording strategy affects the recording / reproducing quality, it is set to the optimum strategy. The laser light power-modulated by the recording data is emitted from the CD LD or DVD LD of the optical pickup 16 and the data is recorded on the optical disk 10. After recording the data, the optical pickup 16 reproduces the recorded data by irradiating a laser beam with a reproduction power, and supplies it to the RF circuit 26. The RF circuit 26 supplies the reproduction signal to the binarization circuit 34, and the binarized data is supplied to the encode / decode circuit 36.

  FIG. 2 shows an external view of an optical disk processing system including the optical disk device. A plurality of cases C1, C2, C3, and C4 having the same capacity for accommodating the optical disk 10 are disposed on the top surface of the recording unit 150 that is an optical disk device. These cases C1, C2, C3, and C4 are supported by a support structure disposed on the back surface thereof, and are configured to be detachable from the support structure. In the arrangement state of the cases C1, C2, C3, and C4 shown in the figure, the case C1 is used as a collection case, and the cases C2, C3, and C4 are used as stock cases, and a predetermined number of unprocessed optical disks are accommodated in each case.

  The clamp unit 100 clamps the center hole of the optical disc 10 and is provided on the transport arm 200. One end of the transfer arm 200 is fixed to the elevation mechanism 33. The elevation mechanism 33 is supported by support columns 44 and 50, and the driving force of the output shaft of the motor 60 is transmitted to the gear 70 via a pulley. The gear 70 meshes with the rack gear 44a of the support column 44, so that the elevation mechanism moves vertically. Then, the transfer arm 200 is moved up and down.

  Ends of the columns 44 and 50 are fixed to a slider block 80, and the slider block 80 is supported by the guide shaft 90 so as to be slidable. The slider block 80 is connected and fixed to a belt 101 stretched around the wheels 110 and 120. By driving the belt 101 by a motor 130, the support blocks 44 and 50 and the transport arm 200 are moved horizontally together with the slider block 80. Reciprocates in the direction.

  The printing unit 140 performs printing on the label surface of the optical disc 10 loaded by the disc tray 140a. The recording unit 150 records information on the optical disk 10 loaded by the disk tray 150a.

  In transporting the optical disk 10 between each case, the printing unit 140, and the recording unit 150, the vertical transport of the optical disk 10 is performed by the elevation mechanism 33, and the transport in the horizontal direction is performed by driving the belt 101.

  The control program is configured so that the processing of the optical disk 10 is performed for each case C2, C3, and C4 that are stock cases, and the system processor that controls the operation of the entire system executes the control program. First, when the optical disk 10 in the uppermost layer of the case C2 is clamped by the disk clamp unit 100 and sequentially conveyed to the printing unit 140 and the recording unit 150 and the predetermined processing is completed, the processed optical disk 10 is a collection case. Housed in C1. When the optical disk 10 in the case C2 is sequentially processed and the optical disk 10 accommodated in the case C2 is exhausted, at this time, the case C2 is made a collection case according to the judgment of the control program. When the process is continued, the unprocessed optical disk 10 accommodated in the case C3 is subjected to a predetermined process and then accommodated in the case C2 serving as a collection case. Thereafter, the same processing is repeated.

  In the above description, the optical disk 10 is first printed on the label surface by the printing unit 140, and then the data is recorded by the recording unit 150. However, the optical disk 10 is taken out from each case and is first stored in the recording unit 150. It is also possible to print on the level surface with the printing unit 140 after transporting and recording data with the recording unit 150. A recording unit 150 may be provided instead of the printing unit 140, and data may be alternately recorded on the optical disk 10 by the plurality of recording units 150.

  As described above, when data is sequentially and continuously recorded on a plurality of optical disks, the productivity becomes a problem. When data is recorded on one optical disk, when physical format information and disk manufacturer information are not embossed in the control data zone, these data are recorded in the control data zone by prewriting. Prior to recording data, the recording power is adjusted to an optimum value. The recording power adjustment process for recording data is generally called OPC (Optimum Power Control). Test data is recorded by changing the recording power in a plurality of stages, and this test data is reproduced to measure the β value. Then, the recording power for obtaining the target β value is set to the optimum recording power. In the past, OPC was performed each time data was recorded on each optical disk. However, the applicant of the present application has recorded the number of recorded sheets or processing when the optical disk has the same manufacturer ID (MID). It has been found that as the number of used sheets increases, it gradually converges to a constant value.

  FIG. 3 shows changes in the optimum recording power obtained by OPC in accordance with the number of recorded sheets or the number of processed sheets. A is the recording power of OPC, B is the moving average value of the recording power, and C is the slope of the moving average. In the figure, the horizontal axis indicates the number of recorded optical disks having the same MID, and the vertical axis indicates the recording power and its inclination. When the number of recorded sheets is relatively small, such as about 0 to 50, that is, when it is considered at the initial stage of system startup, the recording power of the OPC tends to vary or change. The recording power tends to converge to a substantially constant value (57 mW (5.70E + 01)). This means that when the number of recorded sheets is relatively small, it is necessary to adjust the optimum recording power for each optical disk by OPC each time. However, as the number of recorded sheets increases, the variation or change in the optimum recording power decreases. Therefore, it means that it is sufficient to set almost the same recording power. The optimum recording power becomes stable as the number of recordings increases, while the temperature of the optical pickup rises at the beginning of startup, while the temperature of the optical pickup becomes almost constant as the number of recordings increases after a certain period of time has elapsed after startup. It is considered that one of the reasons is that it is stable. The applicant of the present application pays attention to this fact, and when the MID of the optical disk to be recorded is the same, and when the number of recordings becomes a large value and the variation in the optimum recording power decreases, the OPC is not executed. The adjustment process is simplified by using the previous optimum recording power as it is.

  FIG. 4 shows a process flowchart in the present embodiment. First, when the optical disc 10 is inserted (S101), the system controller 32 of the optical disc apparatus determines whether or not the MID of the inserted optical disc 10 is the same as the MID of the optical disc 10 previously recorded (S102). This determination can be made based on the recording data transmitted from the system side. Further, the MID of the optical disk 10 to be produced in advance is designated on the system side, and the system controller 32 can determine that the same MID is continuous unless a change in MID is received from the system side. Of course, when an MID is recorded on the optical disc 10 itself, this MID may be read to determine whether or not it matches the previous MID. For example, the land pre-pit LPP of DVD-R includes the MID only in the land pre-pit LPP of the lead-in area in addition to the address, and this MID is read to determine whether it is the same as the previous MID. May be. The MID includes data such as the manufacturer name of the optical disc 10 and the corresponding double speed, and the fact that they match can be regarded as the optical disc 10 of substantially the same type.

  If the MID is not the same as the previous MID, the system controller 32 executes normal processing. That is, OPC is performed on the optical disk 10 that has been loaded, and the obtained optimum recording power is stored in the memory (S105). The optimum recording power stored in the memory is used to calculate a moving average and its slope as shown in FIG. Then, after setting the optimum recording power, prewrite is executed to record physical format information and disc manufacturer information (MID) in the control data zone (S106). In pre-writing, not only the recording power but also the focus servo gain and tracking servo gain may be adjusted.

  On the other hand, if the MID is the same as the previous MID, the system controller 32 next determines whether or not the variation in the optimum recording power is within an allowable range (S103). This determination is made based on whether or not the change in the moving average or the moving amount average slope of the optimum recording power stored in the memory is equal to or less than a threshold value. You may perform by moving average or the difference with the last value of a moving average below a threshold value. If the variation in the optimum recording power is not within the allowable range, even if the same MID is used, OPC is executed in the same way as in the normal process (S105). On the other hand, if the recording power variation is within the allowable range, it is further determined whether or not the number of consecutive skips of OPC is within a predetermined number (S104). In this determination, when the number of skips reaches a predetermined number, there is a possibility that recording is performed with the same recording power even though the optimum recording power is shifted for some reason. This is because it is considered preferable to redo. The predetermined number of times can be set to 20 times, for example. When the number of continuous skips reaches a predetermined number, OPC is executed in the same way as normal processing (S105). If the number of consecutive skips has not reached the predetermined number, skip without executing OPC, and perform prewrite while maintaining the current optimum recording power, that is, the optimum recording power at the time of prewriting on the previous optical disc 10 as it is. (S106).

  As described above, in the present embodiment, when data is sequentially recorded on a plurality of optical disks 10, it is determined whether or not the optical disk 10 to be recorded next has the same MID as the previous optical disk 10. In the case where the same MID is used, pre-write is executed by skipping the OPC execution under the condition that the variation in the optimum recording power is within the allowable range. And productivity can be improved.

  In the present embodiment, the OPC is executed when the MIDs are not the same, when the variation in the optimum recording power is not within the allowable range, or when the number of skipped OPCs reaches a predetermined number. The OPC may be executed without skipping when another condition is satisfied. For example, a temperature sensor that detects the temperature of the optical pickup 16 is provided, and when this temperature sensor detects a temperature change exceeding an allowable value, the optical disk device or the optical disk processing system is turned off, or a scratch is detected on the optical disk. In such a case, it is preferable to execute the OPC without skipping.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various aspect is possible. For example, in the present embodiment, when the number of skips reaches a predetermined number, the skip is temporarily stopped and the OPC is executed. However, regardless of whether or not the predetermined number of times is reached, the same MID and If the variation is within an allowable range, OPC can be skipped.

  In this embodiment, the OPC is skipped when the MID is the same and the variation is within an allowable range. However, as shown in FIG. 3, the variation is reduced when a certain number of recordings is exceeded. In addition, OPC may be skipped after the number of recorded sheets (or the number of processed sheets) reaches a predetermined number. Further, OPC may be skipped after a predetermined time has elapsed from the start of recording with the same MID.

1 is an overall configuration diagram of an optical disc device. 1 is an overall configuration diagram of an optical disc processing system. It is a graph which shows the change of the optimal recording power of OPC. It is a processing flowchart of an embodiment.

Explanation of symbols

  10 optical disk, 30 servo processor, 32 system controller.

Claims (6)

An optical disk device,
First determination means for determining whether or not the manufacturer ID of the optical disk on which data is to be recorded is the same as the manufacturer ID of the optical disk on which data has already been recorded;
Second determination means for determining whether the variation in optimum recording power is within an allowable range when the first determination means determines that they are the same;
When it is determined by the second determination means that the value is within the allowable range, the current optimum recording power is maintained as it is without executing the optimum recording power adjustment process, and the data is recorded on the optical disk to be recorded. A recording means for recording data on an optical disk on which data is to be recorded by executing an optimum recording power adjustment process when it is determined by the second determination means that it is not within an allowable range;
An optical disc apparatus comprising: The apparatus of claim 1.
With an optical pickup,
Detecting means for detecting the temperature of the optical pickup;
Have
The recording means records the data by executing an optimum recording power adjustment process when a temperature change is detected by the detecting means even when the second determining means determines that the value is within an allowable range. An optical disk apparatus for recording data on an optical disk to be recorded. The apparatus of claim 1.
The recording means adjusts the optimum recording power when the number of continuous non-executions of the optimum recording power adjustment process reaches a predetermined number even when the second judging means judges that the value is within the allowable range. An optical disc apparatus characterized by recording data on an optical disc on which data is to be recorded by executing processing. The apparatus of claim 1.
The optical disc apparatus, wherein the recording means records data in a control data zone of the optical disc. An optical disc device according to any one of claims 1 to 4,
A transport mechanism for sequentially transporting unrecorded optical discs to the optical disc device, and taking out and transporting recorded optical discs from the optical disc device;
An optical disc processing system. An optical disc device according to any one of claims 1 to 4,
A printing unit for printing on the label surface of the optical disc;
An optical disk processing system for continuously processing data recording in the optical disk device and label surface printing in the printing unit.

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