JP2007200381A - Optical disk device operation method and optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device operation method capable of achieving appropriate recording/reproducing than before even with an optical disk having warpage generated in a radial direction. <P>SOLUTION: In S12, test-recording is performed in an inner peripheral part without changing the radial tilt amount of an objective lens. In S13, the test-record is reproduced while changing the radial tilt amount of the objective lens to obtain an inner peripheral side radial tilt amount where jitter components are reduced. In S16, test-recording is performed in the outer peripheral part of the optical disk without changing the radial tilt amount of the objective lens. In S17, the outer peripheral radial tilt value of the objective lens where jitter components are reduced is obtained while changing the radial tilt amount of the objective lens, and during recording/reproducing in an optical disk, the radial tilt amount of the objective lens is interpolated according to the inner and outer peripheral radial tilt values and an optical pickup position of each time. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an optical disk apparatus operating method for accessing an optical disk through an optical pickup and recording or reproducing information.

  Data (pits) are always used for media such as DVD-ROM (Digital Versatile Disk Read Only Memory), recorded DVD-R (Digital Versatile Disk Recordable), and DVD-RW (Digital Versatile Disk ReWritable). It is an existing medium, and the best tilt point for reproduction can be detected by adding an offset to the tilt actuator of the optical pickup.

  Since there is no data as described above on a medium that is not recorded on DVD-R or DVD-RW, it is possible to use a push-pull signal offset change or a wobbling signal as tilt detection means. is there.

  However, as in DVD-RAM, a disc in which the wavelength λ of the laser emitted from the optical pickup is a groove structure as in a DVD-RAM disc and the land and groove steps are designed to be λ / 6 has a tracking error ( The detection sensitivity of the push-pull signal (TE) is high, and the offset change of the push-pull signal and wobbling signal due to the tilt change is small, so that accurate tilt detection is difficult.

For example, a disc having a format structure such as a DVD-RAM medium has drive test zone (DTZ) recording areas that cannot be used by the user at the innermost and outermost positions of the disc. Using this area, test recording is actually performed, and by reproducing this area, the best point of tilt can be found each time the disk is started.
JP 2001-243627 A

  However, since the optical disk warps in the radial direction within the disk surface and there is a so-called tilt, when the focused laser beam emitted from the optical pickup is irradiated onto the disk, the spot is focused on the information surface of the optical disk. Since aberration occurs, the reproduction performance and recording performance of the optical disc deteriorate.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an optical disk apparatus operating method capable of realizing more appropriate recording / reproduction than in the past even for an optical disk warped in the radial direction within the disk surface.

  The optical disk apparatus operating method according to claim 1 of the present invention is such that when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at the time of start-up to rotate the inner circumference of the objective lens. The radial radial tilt value and the outer radial tilt value are obtained, and the inner radial radial tilt value, the outer radial tilt value, and the position of the optical pickup in the radial direction of the optical pickup from time to time are recorded / reproduced on the optical disc. The radial tilt amount of the objective lens is interpolated according to the above.

  According to a second aspect of the present invention, when the optical disk apparatus is operated by accessing the optical disk via an optical pickup and recording or reproducing information, the optical disk is rotated at the time of activation to Test recording is performed on the inner periphery of the optical disc without changing the radial tilt amount of the lens, and this is reproduced by the optical pickup while changing the radial tilt amount of the objective lens, and output from the photodetector of the optical pickup An inner peripheral radial tilt value of the objective lens in which the jitter component in the RF signal processed with the signal is reduced is obtained, the optical pickup is moved to the outer peripheral side of the optical disc, and the radial tilt amount of the objective lens is not changed. Test recording is performed on the outer periphery of the optical disc, and this is changed while changing the radial tilt amount of the objective lens. A radial tilt value of the outer peripheral side of the objective lens, in which the jitter component in the RF signal reproduced by the optical pickup and processed from the output signal of the photodetector is reduced, is obtained during recording / reproduction on the optical disc. A radial tilt amount of the objective lens is interpolated according to a radial radial tilt value, an outer peripheral radial tilt value, and an occasional radial position of the optical pickup on the optical disc.

  According to a third aspect of the present invention, when the optical disk apparatus is operated by accessing the optical disk via the optical pickup and recording or reproducing information, the optical disk is rotated at the time of activation to Test recording is performed on the inner periphery of the optical disk while changing the radial tilt amount of the lens, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens and output from the optical detector of the optical pickup. While calculating the radial tilt value of the inner circumference of the objective lens, the jitter component in the RF signal that has processed the signal is reduced, moving the optical pickup to the outer circumference side of the optical disc, and changing the radial tilt amount of the objective lens Test recording on the outer periphery of the optical disk, without changing the radial tilt amount of the objective lens A radial tilt value of the outer peripheral side of the objective lens, in which the jitter component in the RF signal reproduced by the optical pickup and processed from the output signal of the photodetector is reduced, is obtained during recording / reproduction on the optical disc. A radial tilt amount of the objective lens is interpolated according to a radial radial tilt value, an outer peripheral radial tilt value, and an occasional radial position of the optical pickup on the optical disc.

  According to a fourth aspect of the present invention, when an optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at the time of start-up so that the objective of the optical pickup is rotated. An inner radial radial tilt value of the objective lens is reduced while reproducing an embossed area in the inner peripheral portion of the optical disc while changing a radial tilt amount of the lens, and the optical pickup is connected to the outer peripheral side of the optical disc. And recorded on the outer periphery of the optical disc without changing the radial tilt amount of the objective lens, reproduced by the optical pickup while changing the radial tilt amount of the objective lens, and the light detection The outer peripheral side radius of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the detector is reduced A tilt value is obtained, and when recording / reproducing to / from the optical disc, the inner peripheral radial tilt value, the outer peripheral radial tilt value, and an occasional position of the optical pickup in the radial direction of the optical pickup according to the objective lens. It is characterized by interpolating a radial tilt amount.

  According to a fifth aspect of the present invention, when an optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at the time of activation, and the objective of the optical pickup is operated. An inner radial radial tilt value of the objective lens is reduced while reproducing an embossed area in the inner peripheral portion of the optical disc while changing a radial tilt amount of the lens, and the optical pickup is connected to the outer peripheral side of the optical disc. The optical detector is recorded on the outer periphery of the optical disc while changing the radial tilt amount of the objective lens, and is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Radial outer peripheral side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal is reduced A value of the objective lens according to the inner radial radius tilt value, the outer radial tilt value, and sometimes the radial position of the optical pickup on the optical disc during recording / reproduction on the optical disc. It is characterized by interpolating a radial tilt amount.

  According to a sixth aspect of the present invention, when the optical disk apparatus is operated by accessing the optical disk via an optical pickup to record or reproduce information, the optical disk is rotated at the time of start-up. Read the radial tilt amount on the inner circumference side of the objective lens of the optical pickup recorded in the side drive test zone, and change the radial tilt amount of the objective lens within the range including the read radial tilt amount on the inner circumference side While recording the test on the inner peripheral portion of the optical disc, this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the output signal of the optical detector of the optical pickup is processed in the RF signal. An inner peripheral radial tilt value of the objective lens with a reduced jitter component is obtained, and the optical pickup is The radial tilt amount on the outer peripheral side of the objective lens of the optical pickup recorded in the outer peripheral side drive test zone of the optical disc is read and within the range including the read radial tilt amount on the outer peripheral side. Test recording is performed on the outer periphery of the optical disk while changing the radial tilt amount of the objective lens, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. An outer peripheral radial tilt value of the objective lens in which a jitter component in an RF signal obtained by processing an output signal is reduced is obtained, and the inner peripheral radial tilt value, the outer peripheral radial tilt value, The objective lens according to the radial position of the optical pickup on the optical disc from time to time Characterized by interpolating the radial tilt amount.

  According to a seventh aspect of the present invention, when the optical disc apparatus is operated by accessing the optical disc via an optical pickup to record or reproduce information, the optical disc is rotated at the time of start-up. Read the radial tilt amount on the inner circumference side of the objective lens of the optical pickup recorded in the side drive test zone, and change the radial tilt amount of the objective lens within the range including the read radial tilt amount on the inner circumference side While recording the test on the inner periphery of the optical disc, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens, the output signal of the optical detector of the optical pickup is processed in the RF signal. An inner peripheral radial tilt value of the objective lens with a reduced jitter component is obtained, and the optical pickup is The test lens is moved to the outer periphery of the optical disc and recorded on the outer periphery of the optical disc without changing the radial tilt amount of the objective lens, and is reproduced by the optical pickup while changing the radial tilt amount of the objective lens. Then, the outer peripheral radial tilt value of the objective lens, which reduces the jitter component in the RF signal obtained by processing the output signal of the photodetector, is obtained, and the inner peripheral radial tilt value and the The radial tilt amount of the objective lens is interpolated in accordance with an outer peripheral radial tilt value and an occasional radial position of the optical pickup on the optical disc.

  According to an eighth aspect of the present invention, there is provided an optical disc apparatus operating method in which an optical disc is accessed via an optical pickup to record or reproduce information, and the optical disc is rotated at startup to Read the radial tilt amount on the inner circumference side of the objective lens of the optical pickup recorded in the side drive test zone, and change the radial tilt amount of the objective lens within the range including the read radial tilt amount on the inner circumference side While recording the test on the inner periphery of the optical disc, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens, the output signal of the optical detector of the optical pickup is processed in the RF signal. An inner peripheral radial tilt value of the objective lens with a reduced jitter component is obtained, and the optical pickup is The optical disc is moved to the outer peripheral side, test recorded on the outer peripheral portion of the optical disk while changing the radial tilt amount of the objective lens, and reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Then, the outer peripheral radial tilt value of the objective lens, which reduces the jitter component in the RF signal obtained by processing the output signal of the photodetector, is obtained, and the inner peripheral radial tilt value and the The radial tilt amount of the objective lens is interpolated in accordance with an outer peripheral radial tilt value and an occasional radial position of the optical pickup on the optical disc.

  According to a ninth aspect of the present invention, when the optical disk apparatus is operated by accessing the optical disk via an optical pickup to record or reproduce information, the optical disk is rotated at the time of activation to Test recording is performed on the inner periphery of the optical disc without changing the radial tilt amount of the lens, and this is reproduced by the optical pickup while changing the radial tilt amount of the objective lens, and output from the photodetector of the optical pickup The radial tilt value of the inner peripheral side of the objective lens, in which the jitter component in the RF signal that has processed the signal becomes small, is obtained, the optical pickup is moved to the outer peripheral side of the optical disc, and recorded in the outer peripheral drive test zone of the optical disc. Read the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup Test recording is performed on the outer peripheral portion of the optical disc while changing the radial tilt amount of the objective lens within a range including the radial tilt amount on the outer peripheral side, and this is recorded by the optical pickup without changing the radial tilt amount of the objective lens. The radial tilt value of the outer peripheral side of the objective lens, which reduces the jitter component in the RF signal that has been reproduced and processed the output signal of the optical detector of the optical pickup, is obtained, and the inner peripheral side is recorded during reproduction to the optical disc. The radial tilt amount of the objective lens is interpolated according to a radial tilt value, the outer peripheral radial tilt value, and an occasional radial position of the optical pickup on the optical disc.

  According to a tenth aspect of the present invention, when an optical disc is accessed via an optical pickup and information is recorded or reproduced, the optical disc is rotated at the time of activation to obtain an objective of the optical pickup. Test recording is performed on the inner periphery of the optical disk while changing the radial tilt amount of the lens, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens and output from the optical detector of the optical pickup. The radial tilt value of the inner peripheral side of the objective lens, in which the jitter component in the RF signal that has processed the signal becomes small, is obtained, the optical pickup is moved to the outer peripheral side of the optical disc, and recorded in the outer peripheral drive test zone of the optical disc. Read the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup Test recording is performed on the outer peripheral portion of the optical disc while changing the radial tilt amount of the objective lens within a range including the radial tilt amount on the outer peripheral side, and the optical pickup is performed without changing the radial tilt amount of the objective lens. The radial tilt value of the outer peripheral side of the objective lens is reduced so that the jitter component in the RF signal obtained by processing the output signal of the photodetector of the optical pickup is reduced, and the inner circumference is recorded at the time of recording / reproducing on the optical disc. A radial tilt amount of the objective lens is interpolated according to a radial radial tilt value, an outer peripheral radial tilt value, and an occasional radial position of the optical pickup on the optical disc.

  An optical disk apparatus according to an eleventh aspect of the present invention is configured to execute the optical disk apparatus operating method according to any one of the first to tenth aspects.

  According to the present invention, the optical disc is rotated at the time of start-up to obtain the inner peripheral radial tilt value and the outer peripheral radial tilt value of the objective lens, and the inner peripheral radial tilt value and the outer peripheral side are recorded and reproduced on the optical disc. Since the radial tilt amount of the objective lens is interpolated according to the radial tilt value and the position of the optical pickup in the radial direction of the optical pickup from time to time, even if the optical disc is warped in the radial direction within the disc plane, More appropriate recording / playback than before can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Here, the case of a DVD-RAM capable of overwriting data as an optical disk will be described as an example, but the present invention can be similarly applied to other optical disks capable of overwriting data.

(Embodiment 1)
FIG. 2 shows an optical disk apparatus capable of realizing the optical disk apparatus operating method of the present invention, and FIG. 1 shows a starting procedure of the disk when this optical disk apparatus records or reproduces information on a DVD-RAM.

  In FIG. 2, an optical pickup 3 that accesses and reads / writes an optical disk 1 that is rotationally driven by a disk motor 2 includes a light source 4 that generates laser light, an objective lens 5 that focuses the laser light on the surface of the optical disk, A photodetector 6 that generates a light reception signal based on the reflected light from the optical disc 1 of the laser beam condensed by the objective lens 5, a tracking actuator 7 that drives the objective lens 5 in the radial direction of the optical disc 1, and the objective lens The focus actuator 8 drives the optical disk 5 in the vertical direction of the optical disk 1 and the tilt actuator 9 drives the objective lens 5 against the warp in the radial direction of the optical disk 1.

  The tracking drive signal generation means 14 for generating a tracking servo signal for the objective lens 5 to follow the track of the optical disk 1 based on the light reception signal output from the photodetector 6 is used to output the output signal of the photodetector 6 as a TE signal. A tracking error process is performed by the processing unit 10, this is converted into a digital signal by an analog / digital converter 11, and the tracking actuator 7 is driven via the first servo filter circuit 12 and the first driver 13.

  A focus error signal generation means 17 that generates a focus error signal that is an error between the in-focus point of the objective lens 5 and a predetermined position based on the light reception signal output from the photodetector 6, outputs the output signal of the photodetector 6 as FE. A focus error process is performed by the signal processing unit 15, and this is digitally converted by the analog / digital converter 11, and the focus actuator 8 is driven via the first servo filter circuit 12 and the second driver 16. .

  The spindle control generation means 22 for controlling the optical disk 1 to a predetermined number of rotations is performed by the RF signal processing unit 18 based on the received light signal output from the photodetector 6 after the objective lens 5 pulls the focus servo into the optical disk 1. Based on the generated RF signal and the wobble signal generated by the wobble signal processing unit 19 based on the received light signal output from the photodetector 6 after the objective lens 5 pulls the focus servo into the optical disc 1, A spindle control signal is generated via the second servo filter circuit 20, and the disk motor 2 is driven via the spindle drive unit 21.

  The tilt actuator control means 25 for driving the tilt actuator 9 detects the jitter component in the RF signal generated by the RF signal processing unit 18 with the jitter detection unit 23, and the first servo so that the jitter value becomes the minimum value. The radial tilt amount of the tilt actuator 9 is changed via the filter circuit 12 and the third driver 24.

  Note that the data used to determine the radial tilt amount at the time indicated by the tilt actuator control means 25 is read from, for example, a memory 27 provided in the system control unit 26 that performs start-up control, and the first servo filter circuit. 12 is supplied. The system control unit 26 obtains the position information in the radial direction (radial direction) of the optical disk 1 that the optical pickup 3 is accessing from time to time, and obtains the number of tracks that the optical disk 1 has crossed when accessing it. It is configured to be used in determining the quantity.

Reference numeral 28 denotes a laser emission control circuit for controlling the laser power emitted from the light source 4, and its operation is controlled by the system control unit 26.
FIG. 1 shows a flowchart for starting up the system control unit 26 when a DVD-RAM is used as a model of the optical disc 1. In step S12 to step S14, test recording is performed on the inner periphery of the optical disc 1 to detect the jitter best point. In addition, in the characteristic portions of steps S16 to S19, the point that the jitter best point is detected by performing test recording also on the outer periphery of the optical disc 1 is different from the conventional one.

Each step of FIG. 1 executed at the time of activation will be described in detail.
In step S1, the disk motor 2 is rotated at a predetermined speed to reproduce and record the optical disk 1, and the optical pickup 3 is moved toward the inner periphery.

In step S2, a laser necessary for reproducing the optical disc 1 is emitted.
In step S3, the autofocus mechanism is turned on, and the focus servo is pulled in to focus on the information surface portion of the optical disc 1 by the focus error signal generation means 17.

  In step S4, center learning for adjusting the amplitude and symmetry of the tracking error signal is performed for the purpose of avoiding instability of the tracking servo due to variations in the optical pickup 3.

In step S5, the tracking drive signal generation means 14 pulls in the tracking servo so that the light spot is positioned on the track of the optical disc 1.
In step S6, learning is performed to obtain an optimum servo gain for the purpose of keeping the focus and tracking servo stable.

In step S7, the optical pickup 3 is moved to the embossed area A of the optical disc 1 and reading is performed to determine the type of media and its size capacity.
In step S8, control data including information for ensuring the recording quality of the optical disc 1 is acquired.

In step S9, the reproduction moves to the data portion of the reproduction / recording area of the inner periphery side drive test zone B of the optical disc 1.
In step S10, the focus error signal generation means 17 learns the focus servo position and corrects the track position accessed by the optical pickup 3 for the purpose of setting the focus position point where the reproduction quality is the best.
In step S11, test recording is performed in the inner periphery side drive test zone B, and the optimum recording power with the best recording quality is learned to set the recording power.

In step S12, test recording is performed at the optimum recording power while keeping the radial tilt amount of the objective lens 5 constant in the inner periphery side drive test zone B without changing it.
In step S13, the objective lens when the jitter component detected by the jitter detector 23 is minimized by reproducing the inner drive test zone B while changing the radial tilt amount of the objective lens 5 by the tilt actuator control means 25. The radial tilt value is detected and a voltage or current is applied to the tilt actuator 9 to set the best tilt value on the innermost circumference of the disk.

In step S14, the best inner-side tilt value detected in step S13 is stored in the memory 27.
In step 15, the optical pickup 3 is moved to the outer periphery to check the defect management area (DMA) on the inner periphery for defect information of the optical disc 1 and the DMA present at the outermost peripheral position of the optical disc. Check DMA.

  In step S16, test recording is performed in the outer peripheral side drive test zone D of the optical disc 1 with the optimum recording power while keeping the radial tilt amount of the objective lens 5 constant without changing the same as in step S12.

  In step S17, as in step S13, the outer peripheral drive test zone D is reproduced while the radial tilt amount of the objective lens 5 is changed, and the tilt value with the smallest jitter value is detected to detect the best tilt value on the outer peripheral side. Set to.

In step S18, the tilt value at which the jitter value is minimized at the outermost periphery of the disc detected in step S17 is stored in the memory 27.
In step S19, the inner peripheral radial tilt value stored in the memory 27 in step S14, the outer peripheral radial tilt value stored in the memory 27 in step S18, and the user area C of the optical disc 1 in the radial direction (radial direction). Based on the position of each section divided into a plurality of sections, the tilt value of each section is calculated by a straight line or quadratic approximation and set in the memory 27.

  When the optical pickup 3 accesses the user area C of the optical disc 1 when the optical pickup 3 has been started up in this way, the optimum read out from the memory 27 for each section accessed by the optical pickup 3 from time to time. The tilt actuator control means 25 is operated so as to obtain a tilt value, thereby realizing optimum recording / reproduction.

  In step S12 and step S16, test recording is performed on the optical disc 1 in a state where the radial tilt amount of the objective lens 5 is not changed, and in step S13 and step S17, the radial tilt amount of the objective lens 5 is changed. While the optical disk 1 was reproduced and the optimum radial tilt value was detected, at least one of step S12 and step S16 was test-recorded on the optical disk 1 while changing the radial tilt amount of the objective lens 5, and step S13 and step S17. Then, the test recorded while changing the radial tilt amount is reproduced without changing the radial tilt amount of the objective lens 5, and the tilt value at which the jitter value is minimized is detected, and the radial tilt amount is determined. For those recorded without change, the radial tilt amount of the objective lens 5 is changed. Jitter value was reluctant reproduction can also be configured to detect a tilt value at a minimum.

(Embodiment 2)
FIG. 3 shows a flowchart of the optical disk apparatus operating method according to (Embodiment 2) of the present invention.
This (Embodiment 2) can be applied to the case where there is a pit (recorded state) in the embossed area A of the optical disc 1. When there are pits in the embossed area A, the RF signal can be detected by reproducing the embossed area A, jitter measurement is possible, and the inner peripheral radial tilt value can be acquired by the embossed area A.

  In (Embodiment 1) shown in FIG. 1, test recording is performed in step S12 on the inner circumference side drive test zone B of the optical disc 1 to obtain the optimum tilt value on the inner circumference side. In (Embodiment 2), after acquiring the control data in step S8, the tilt actuator control means 25 is operated while reproducing the embossed area A of the optical disc 1 in step S20, and the voltage or voltage applied to the tilt actuator 9 is reproduced. Jitter is measured by the jitter detector 23 while changing the radial tilt amount of the objective lens 5 by adding an electric current, and the radial tilt value when the jitter value becomes the minimum value is stored in the memory 27 in step S14. .

  Steps S9 to S11 executed after step S14 are the same as steps S9 to S11 of (Embodiment 1) shown in FIG. Following step S11 of FIG. 3, steps S15 to S18 of (Embodiment 1) shown in FIG. 1 are executed, and in step S19 following step S18, the inner peripheral side stored in memory 27 in step S14 Based on the radial tilt value, the outer peripheral radial tilt value stored in the memory 27 in step S18, and the position of each section obtained by dividing the user area C of the optical disc 1 into a plurality of sections in the radial direction (radial direction). Alternatively, the tilt value of each section is calculated by quadratic approximation or the like and set in the memory 27.

  When the optical pickup 3 accesses the user area C of the optical disc 1 when the optical pickup 3 has been started up in this way, the optimum read out from the memory 27 for each section accessed by the optical pickup 3 from time to time. The tilt actuator control means 25 is operated so as to obtain a tilt value, thereby realizing optimum recording / reproduction.

  In step S16, test recording is performed on the optical disc 1 in a state where the radial tilt amount of the objective lens 5 is kept unchanged, and in step S17, the optical disc 1 is reproduced while changing the radial tilt amount of the objective lens 5. The optimum radial tilt value was detected, but test recording was performed on the optical disc 1 while changing the radial tilt amount of the objective lens 5, and the jitter was reproduced and reproduced in a state where the radial tilt amount of the objective lens 5 was not changed. A tilt value that minimizes the value can also be detected.

(Embodiment 3)
FIG. 4 shows a flowchart of an optical disk apparatus operating method according to (Embodiment 3) of the present invention.
In (Embodiment 1), the optimum radial tilt values on the inner and outer peripheral sides of the optical disk 1 of the objective lens 5 were measured each time it was started. In FIG. 4 showing this (Embodiment 3), the tilt is measured. The difference is that the value itself is recorded directly on the disc and the tilt value is set by reading the value when starting next time.

  Specifically, steps S1 to S11 in FIG. 4 are the same as those in FIG. In FIG. 4, a routine of step S21 and step S22 not provided in FIG. 1 is interposed between step S11 and step S12.

  That is, in step S21 subsequent to step S11, the inner peripheral radial tilt value of the objective lens 5 recorded in advance in the inner peripheral drive test zone B of the optical disc 1 is read and stored in the memory 27.

  In step S22, the tilt actuator control means 25 is operated to set the tilt actuator 9 so that the inner peripheral radial tilt value read in step S21 is obtained.

  In step S12 subsequent to step S22, the radial tilt amount of the objective lens 5 in the inner circumferential drive test zone B is limited to the radial tilt values before and after the inner circumferential radial tilt value set in step S22. Test recording is performed with the optimum recording power while being changed by the tilt actuator control means 25.

  In step S13, the objective lens 5 is reproduced when the inner peripheral side drive test zone B is reproduced while the radial tilt amount of the objective lens 5 is kept constant without changing the jitter component detected by the jitter detector 23. The radial tilt value is detected, and a voltage or current is applied to the tilt actuator 9 to set the best tilt value on the innermost circumference of the disk.

In step S23, the best radial tilt value on the inner circumference obtained in step S13 is recorded in the inner circumference drive test zone B of the optical disc 1.
Following step S23, in step S14, the best tilt value on the inner circumference detected in step S13 is stored in the memory 27.

  In step 15, the optical pickup 3 is moved to the outer periphery to check the defect management area (DMA) on the inner periphery for defect information of the optical disc 1 and the DMA present at the outermost peripheral position of the optical disc. Check DMA.

  Following step 15, in step S <b> 24, the outer peripheral radial tilt value of the objective lens 5 recorded in advance in the outer peripheral drive test zone D of the optical disk 1 is read and stored in the memory 27. In step S25, the tilt actuator 9 is operated to set the tilt actuator 9 so that the outer peripheral radial tilt value read in step S21 is obtained.

  In step S16 following step S25, the tilt tilt actuator limits the radial tilt amount of the objective lens 5 in the outer peripheral side drive test zone D to the radial tilt values before and after the outer peripheral radial tilt value set in step S25. Test recording is performed with the optimum recording power while changing by the control means 25.

  In step S17, the radial of the objective lens when the jitter component detected by the jitter detector 23 is minimized by reproducing the outer periphery side drive test zone D while keeping the radial tilt amount of the objective lens 5 constant without changing it. The tilt value is detected, and a voltage or current is applied to the tilt actuator 9 to set the best tilt value on the outer peripheral side.

In step S26 following step S17, the best radial tilt value on the outer peripheral side obtained in step S17 is recorded in the outer peripheral drive test zone D of this optical disc.
In step S18 following step S26, the best tilt value on the outer peripheral side detected in step S17 is stored in the memory 27.

  In step S19, the inner peripheral radial tilt value stored in the memory 27 in step S14, the outer peripheral radial tilt value stored in the memory 27 in step S18, and the user area C of the optical disc 1 in the radial direction (radial direction). Based on the position of each section divided into a plurality of sections, the tilt value of each section is calculated by a straight line or quadratic approximation and set in the memory 27.

  In this manner, the inner peripheral radial tilt value recorded in step S23 is read in step S21 at the next start-up, and in step S12, the inner peripheral radial tilt value read in step S21 is used as a center, before and after. The optimum radial tilt value can be detected only by performing test recording with the optimum recording power while changing by the tilt actuator control means 25 while limiting to the radial tilt value.

  Further, the outer peripheral radial tilt value recorded in step S26 is read in step S24 at the next start-up, and in step S16, the radial tilt value before and after the outer peripheral radial tilt value is read out in step S24. The optimum radial tilt value can be detected only by performing test recording with the optimum recording power while changing the tilt actuator control means 25 only to the above.

  In this (Embodiment 3), the case where the inner peripheral radial tilt value is recorded in step S23 and the outer peripheral radial tilt value is recorded in step S26 has been described as an example. However, the inner peripheral radial tilt value is described. Alternatively, only one of the outer peripheral side radial tilt values is recorded on the optical disc 1, and processing of the inner peripheral side radial tilt value or the outer peripheral side radial tilt value that has not been recorded is configured as in (Embodiment 1). Can also be realized.

(Embodiment 4)
In each of the above-described embodiments, the radial tilt value of the objective lens 5 when recording / reproducing corresponding to the radial warp of the optical disc 1 used is substantially the same as the radial tilt value for the groove and the radial tilt value for the land. Therefore, in the case of the groove, the measurement is performed in steps S13 and S17 in FIG. 1, the measurement is performed in step S17 in FIG. 3, the measurement is performed in steps S13 and S17 in FIG. The interpolation data of the radial tilt value obtained in step S19 in FIG. 4 is used not only for recording / reproducing the groove but also for recording / reproducing the land. However, the radial data is separately obtained for the groove and the land. It is also possible to measure the tilt value and store the tilt value of the objective lens 5 individually. Specifically, in step S13 and step S17 of FIG. 1 or FIG. 4, the radial tilt value of the objective lens 5 is obtained for the groove and the radial tilt value of the objective lens 5 is obtained for the land. In step S19, the groove is obtained. Based on the inner peripheral radial tilt value and the outer peripheral radial tilt value of the groove, data for interpolating the radial tilt value of the objective lens 5 at the time of recording / reproducing the groove in the user area C of the optical disc 1 is obtained. An objective lens that is stored in the memory 27 and that is used when recording / reproducing the land in the user area C of the optical disc 1 based on the inner peripheral radial tilt value for the land and the outer peripheral radial tilt value for the land. Data for interpolating the radial tilt value of 5 is stored in the memory 27.

  In the case of FIG. 3, in step S17, the radial tilt value of the objective lens 5 is obtained for the groove, and the radial tilt value of the objective lens 5 is also obtained for the land. In step S19, the radial tilt value is obtained from the embossed area A in step S14. Based on the inner peripheral radial tilt value and the outer peripheral radial tilt value for the groove obtained in step S17, the radial tilt value of the objective lens 5 at the time of recording / reproducing the groove in the user area C of the optical disc 1 is calculated. The data to be interpolated is stored in the memory 27. Further, based on the inner peripheral radial tilt value obtained from the embossed area A in step S14 and the outer peripheral radial tilt value for the land obtained in step S17, the user of the optical disc 1 is stored. Sometimes objective lens 5 when recording / reproducing the land C Storing data for interpolating the radial tilt value in the memory 27.

(Embodiment 5)
In (Embodiment 4), the radial tilt value of each of the groove and the land is obtained, and when recording / reproducing the groove in the user area C of the optical disc 1, the objective lens for recording / reproducing the groove from the memory 27 is sometimes used 5 is read out and controlled to the radial tilt value of the objective lens 5, and when the land in the user area C of the optical disk 1 is recorded / reproduced, the land is recorded / reproduced from the memory 27. The data for interpolating the radial tilt value of the objective lens 5 at the time of reading is read out and controlled to the radial tilt value of the objective lens 5, but the objective lens 5 at the time of recording / reproducing of the groove and land in the user area C of the optical disc 1 is used. The radial tilt value of the objective lens 5 for the groove and the objective lens 5 for the land It can also be carried out by controlling an intermediate value between the radial tilt value.

  The optical disk apparatus operating method of the present invention contributes to recording / reproduction with higher accuracy than before in an optical disk apparatus having a tilt actuator that changes the objective lens of the optical pickup in accordance with the warp in the radial direction within the disk surface of the optical disk. it can.

Flowchart diagram at the time of starting (Embodiment 1) of the optical disk apparatus operating method of the present invention Configuration diagram of an optical disk apparatus adopting the optical disk apparatus operating method of the embodiment Flowchart diagram at the time of starting (Embodiment 2) of the optical disk apparatus operating method of the present invention Flowchart diagram at the time of starting (Embodiment 3) of the optical disk apparatus operating method of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk A Embossed area of optical disk 1 B Inner side drive test zone of optical disk 1 C User area of optical disk 1 D Outer side drive test zone of optical disk 1 2 Disc motor 3 Optical pickup 4 Light source 5 Objective lens 6 Optical detector 7 Tracking Actuator 8 Focus actuator 9 Tilt actuator 10 TE signal processing unit 11 Analog / digital converter 12 First servo filter circuit 13 First driver 14 Tracking drive signal generating means 15 FE signal processing unit 16 Second driver 17 Focus error signal Generation unit 18 RF signal processing unit 19 Wobble signal processing unit 20 Second servo filter circuit 21 Spindle drive unit 22 Spindle control generation unit 23 Jitter detection unit 24 Third driver 25 Tilt driver Chueta control means 26 the system control unit 27 memory 28 laser emission control circuit

Claims (11)

When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disk is rotated to obtain the inner peripheral radial tilt value and outer peripheral radial tilt value of the objective lens,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At start-up, the optical disc is rotated, and test recording is performed on the inner periphery of the optical disc without changing the radial tilt amount of the objective lens of the optical pickup, and this is performed while changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner peripheral side of the objective lens in which the jitter component in the RF signal that is reproduced by the pickup and processed the output signal of the photodetector of the optical pickup is reduced,
The optical pickup is moved to the outer peripheral side of the optical disc, test recording is performed on the outer peripheral portion of the optical disc without changing the radial tilt amount of the objective lens, and the optical pickup is changed while changing the radial tilt amount of the objective lens. Obtaining the outer peripheral radial tilt value of the objective lens in which the jitter component in the RF signal reproduced by the pickup and processing the output signal of the photodetector is reduced,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disk is rotated and test recording is performed on the inner peripheral portion of the optical disk while changing the radial tilt amount of the objective lens of the optical pickup, and this is performed without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner peripheral side of the objective lens in which the jitter component in the RF signal that is reproduced by the pickup and processed the output signal of the photodetector of the optical pickup is reduced,
The optical pickup is moved to the outer peripheral side of the optical disc, and test recording is performed on the outer peripheral portion of the optical disc while changing the radial tilt amount of the objective lens, and this is performed without changing the radial tilt amount of the objective lens. Obtaining the outer peripheral radial tilt value of the objective lens in which the jitter component in the RF signal reproduced by the pickup and processing the output signal of the photodetector is reduced,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
When starting up, the optical disk is rotated, and the radial tilt amount of the objective lens of the optical pickup is changed while the embossed area of the inner peripheral part of the optical disk is reproduced. Find the tilt value,
The optical pickup is moved to the outer peripheral side of the optical disc, and test recording is performed on the outer peripheral portion of the optical disc without changing the radial tilt amount of the objective lens, and this is performed while changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the outer peripheral side of the objective lens by reducing the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the photodetector,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
When starting up, the optical disk is rotated, and the radial tilt amount of the objective lens of the optical pickup is changed while the embossed area of the inner peripheral part of the optical disk is reproduced. Find the tilt value,
The optical pickup is moved to the outer peripheral side of the optical disc, and test recording is performed on the outer peripheral portion of the optical disc while changing the radial tilt amount of the objective lens, and this is performed without changing the radial tilt amount of the objective lens. Obtaining the outer peripheral radial tilt value of the objective lens in which the jitter component in the RF signal reproduced by the pickup and processing the output signal of the photodetector is reduced,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disc is rotated, the radial tilt amount on the inner peripheral side of the objective lens of the optical pickup recorded in the inner peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the inner peripheral side is read. Test recording is performed on the inner peripheral portion of the optical disc while changing the radial tilt amount of the objective lens within a range including this, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner circumference side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector is reduced;
The optical pickup is moved to the outer peripheral side of the optical disc, the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup recorded in the outer peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the outer peripheral side is read Test recording on the outer periphery of the optical disc while changing the radial tilt amount of the objective lens within a range including the same, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. Obtaining a radial tilt value on the outer peripheral side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector becomes small;
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disc is rotated, the radial tilt amount on the inner peripheral side of the objective lens of the optical pickup recorded in the inner peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the inner peripheral side is read. Test recording is performed on the inner peripheral portion of the optical disc while changing the radial tilt amount of the objective lens within the range including the same, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner circumference side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector is reduced;
The optical pickup is moved to the outer peripheral side of the optical disc, and test recording is performed on the outer peripheral portion of the optical disc without changing the radial tilt amount of the objective lens, and this is performed while changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the outer peripheral side of the objective lens by reducing the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the photodetector,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disc is rotated, the radial tilt amount on the inner peripheral side of the objective lens of the optical pickup recorded in the inner peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the inner peripheral side is read. Test recording is performed on the inner peripheral portion of the optical disc while changing the radial tilt amount of the objective lens within the range including the same, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner circumference side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector is reduced;
The optical pickup is moved to the outer peripheral side of the optical disc, and test recording is performed on the outer peripheral portion of the optical disc while changing the radial tilt amount of the objective lens, and this is performed without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the outer peripheral side of the objective lens by reducing the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the photodetector,
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At start-up, the optical disc is rotated, and test recording is performed on the inner periphery of the optical disc without changing the radial tilt amount of the objective lens of the optical pickup, and this is performed while changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner peripheral side of the objective lens in which the jitter component in the RF signal that is reproduced by the pickup and processed the output signal of the photodetector of the optical pickup is reduced,
The optical pickup is moved to the outer peripheral side of the optical disc, the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup recorded in the outer peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the outer peripheral side is read Test recording on the outer periphery of the optical disc while changing the radial tilt amount of the objective lens within a range including the same, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. Obtaining a radial tilt value on the outer peripheral side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector becomes small;
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. When recording or reproducing information by accessing an optical disk via an optical pickup,
At startup, the optical disk is rotated and test recording is performed on the inner peripheral portion of the optical disk while changing the radial tilt amount of the objective lens of the optical pickup, and this is performed without changing the radial tilt amount of the objective lens. Obtaining the radial tilt value on the inner peripheral side of the objective lens in which the jitter component in the RF signal that is reproduced by the pickup and processed the output signal of the photodetector of the optical pickup is reduced,
The optical pickup is moved to the outer peripheral side of the optical disc, the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup recorded in the outer peripheral drive test zone of the optical disc is read, and the read radial tilt amount on the outer peripheral side is read Test recording on the outer periphery of the optical disc while changing the radial tilt amount of the objective lens within a range including the same, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. Obtaining a radial tilt value on the outer peripheral side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the optical detector becomes small;
At the time of recording / reproducing on the optical disc, the radial tilt amount of the objective lens is interpolated according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc from time to time. An optical disk apparatus operating method. An optical disk apparatus configured to execute the optical disk apparatus operating method according to claim 1.

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