WO2007086284A1

WO2007086284A1 - Optical disc device operating method and optical disc device

Info

Publication number: WO2007086284A1
Application number: PCT/JP2007/050552
Authority: WO
Inventors: Hideki Shirane; Kazuko Uehara
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2006-01-24
Filing date: 2007-01-17
Publication date: 2007-08-02
Also published as: JP2007200381A

Abstract

Provided is an optical disc device operating method by which recording/reproduction of even an optical disc warped in a radial direction can be performed more correctly than by conventional devices. An inner circumference side radial tilt value of an objective lens is obtained in S12 and S13, an outer circumference side radial tilt value of the objective lens is obtained in S16 and S17, and the radial tilt value of the objective lens is interpolated at the time of performing recording and reproduction into and from the optical disc, corresponding to the inner circumferences side radial tilt value, the outer circumference side radial tilt value and each position of an optical pickup.

Description

Optical disk apparatus operating method and optical disk apparatus

Technical field

[0001] The present invention relates to an optical disk apparatus operating method for accessing or recording information on an optical disk via an optical pickup.

Background art

[0002] Media for playback such as DVD-ROM (Digital Versatile Disk Read Only Memory), recorded DVD—R (Digital Versatile Disk Recordable), and DVD-RW (Digital Versatile Disk Rewritable) are data (pit). ) Is always present, and the best tilt point for playback can be detected by offsetting the optical pickup tilt actuator.

[0003] Since media not recorded on DVD-R and DVD-RW does not have the above-mentioned data, the offset change of push-pull signal and wobbling signal are used as tilt detecting means. It is possible.

[0004] As with DVD-RAM, the wavelength λ of the laser emitted from the optical pickup is a groove structure similar to that of DV D-RAM disc, and the step between the land and group is designed to be λΖ6. The push-pull signal, which is a tracking error (ΤΕ), has a high detection sensitivity. Because the change in the offset of the push-pull signal and wobbling signal due to the tilt change is small, accurate tilt detection is difficult.

[0005] For example, in a disc having a format structure such as DVD—RAM media, there is a drive test zone (DTZ) recording area that cannot be used by the user at the innermost and outermost positions of the disk. By actually performing test recording using this area and reproducing this area, the best point of tilt can be found each time the disk is started. Patent Document 1: JP 2001-243627 A

Disclosure of the invention

Problems to be solved by the invention [0006] 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, it is collected on the information surface of the optical disk. Since the aberration is generated in the illuminated spot, the reproduction performance and recording performance of the optical disc deteriorate.

[0007] An object of the present invention is to provide an optical disk apparatus operating method capable of realizing more appropriate recording Z reproduction than before even for an optical disk warped in the radial direction within the disk surface.

Means for solving the problem

[0008] 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 start-up. The inner peripheral radial tilt value and outer peripheral radial tilt value of the objective lens are obtained, and when recording on the optical disk, during playback, the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the occasional optical pickup of the optical pickup are It is characterized in that the radial tilt amount of the objective lens is interpolated according to the radial position on the optical disc.

[0009] In the optical disk apparatus operating method according to claim 2 of the present invention, when the information is recorded or reproduced by accessing the optical disk via an optical pickup, the optical disk is rotated at startup, 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 reproduced by the optical pickup while changing the radial tilt amount of the objective lens. The radial tilt value of the inner peripheral side of the objective lens in which the jitter component in the RF signal obtained by processing the output signal of the photodetector is reduced is obtained, the optical pickup is moved to the outer peripheral side of the optical disc, and the objective lens Test recording is performed on the outer periphery of the optical disc without changing the radial tilt amount, and this is used to change the radial tilt amount of the objective lens. However, the radial tilt value of the outer peripheral side of the objective lens is obtained by reducing the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the photodetector. The objective lens according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the position of the optical pickup in the radial direction of the optical pickup from time to time. The radial tilt amount is interpolated.

[0010] In the optical disk apparatus operating method according to claim 3 of the present invention, when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at startup, Test recording is performed on the inner periphery of the optical disc by changing the radial tilt amount of the objective lens of the optical pickup S, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. The radial tilt value of the inner 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 of the optical pickup is reduced, is moved to the outer peripheral side of the optical disc, and the optical pickup is moved. While changing the radial tilt amount of the objective lens, a test recording is made on the outer periphery of the optical disc, and this is used to change the radial tilt amount of the objective lens. The jitter component in the RF signal reproduced by the optical pickup and processed by the optical pickup without processing is reduced, and the radial tilt value on the outer peripheral side of the objective lens is obtained and recorded on the optical disc during Z reproduction. Further, the radial tilt amount of the objective lens is interpolated in accordance with the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the position of the optical pickup in the radial direction of the optical pickup from time to time. .

[0011] The optical disk apparatus operating method according to claim 4 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 startup. The force that does not change the radial tilt amount of the objective lens of the optical pickup The jitter component when the embossed area of the inner peripheral portion of the optical disk is reproduced is reduced. The inner peripheral radial tilt value of the objective lens is obtained, and 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. The jitter component in the RF signal reproduced by the optical pickup and processed from the output signal of the photodetector is reduced. The objective lens is obtained in accordance with the inner peripheral radial tilt value, the outer peripheral radial tilt value, and the occasional radial position of the optical pickup on the optical disc during recording Z reproduction on the optical disc. The radial tilt amount is interpolated.

[0012] An optical disc apparatus operating method according to claim 5 of the present invention is an optical pick for an optical disc. When the information is recorded or reproduced through access, the optical disk is rotated at the time of start-up, and the radial tilt amount of the objective lens of the optical pickup is not changed. The jitter component when the region is reproduced is reduced. The inner peripheral radial tilt value of the objective lens 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 changed. Test recording is performed on the outer periphery of the optical disc, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the jitter component in the RF signal obtained by processing the output signal of the photodetector is small. The outer peripheral radial tilt value of the objective lens is determined, and the inner peripheral radial tilt value is recorded during recording Z reproduction on the optical disc. Depending on the radial position on the optical disc of the value and the outer peripheral side radial tilt values and sometimes of the optical pickup, wherein the interpolating radial tilt amount of the objective lens.

The optical disk apparatus operating method according to claim 6 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 startup to Reads the radial tilt amount on the inner peripheral side of the objective lens of the optical pickup recorded in the inner peripheral side drive test zone, and reads the radial tilt amount of the objective lens within the range including the read radial tilt amount on the inner peripheral side. Test recording is performed on the inner periphery of the optical disc while changing the amount, and 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. The radial tilt value of the inner peripheral side of the objective lens is reduced so that the jitter component in the RF signal is reduced, 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 drive test zone of the optical disc is read, and the read radial tilt amount on the outer peripheral side is included. Test recording is performed on the outer periphery of the optical disc while changing the radial tilt amount of the objective lens within the range, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the optical pickup 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 optical detector becomes smaller, and the inner peripheral radial tilt value and the above-mentioned value are recorded during recording Z reproduction on the optical disc. Peripheral radial tilt value and sometimes on the optical disc of the optical pickup It is characterized in that the radial tilt amount of the objective lens is interpolated according to the position in the radial direction.

[0014] In the optical disk apparatus operating method according to claim 7 of the present invention, when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at startup, The objective lens is recorded in the inner periphery side drive test zone of the optical disc, and reads the radial tilt amount on the inner periphery side of the objective lens of the optical pickup, and within the range including the read radial tilt amount on the inner periphery side. Test recording is performed on the inner periphery of the optical disc while changing the radial tilt amount of the optical disc, 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. A 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 is reduced, is obtained, and the optical pickup is moved forward. The optical pickup is moved to the outer peripheral side of the optical disc and test recorded on the outer peripheral portion of the optical disc without changing the radial tilt amount of the objective lens, and this is picked up by the optical pickup while changing the radial tilt amount of the objective lens. The outer peripheral radial tilt value of the objective lens that reduces the jitter component in the RF signal that is reproduced and processed the output signal of the photodetector is obtained, and the inner peripheral radial tilt is recorded during recording on the optical disc. The radial tilt amount of the objective lens is interpolated according to the value, the outer peripheral radial tilt value, and the radial position of the optical pickup on the optical disc at any time.

[0015] In the optical disk apparatus operating method according to claim 8 of the present invention, when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at startup, The objective lens is recorded in the inner periphery side drive test zone of the optical disc, and reads the radial tilt amount on the inner periphery side of the objective lens of the optical pickup, and within the range including the read radial tilt amount on the inner periphery side. Test recording is performed on the inner periphery of the optical disc while changing the radial tilt amount of the optical disc, 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. A 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 is reduced, is obtained, and the optical pickup is moved forward. Is moved to the outer peripheral side of the optical disk, the outer periphery of the optical disc while changing the radial tilt amount of the objective lens Test recording is performed, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the jitter component in the RF signal obtained by processing the output signal of the photodetector is reduced. The outer peripheral radial tilt value of the optical pickup is determined according to the inner peripheral radial tilt value, the outer peripheral radial tilt value, and sometimes the radial position of the optical pickup on the optical disc during recording Z reproduction on the optical disc. The radial tilt amount of the object lens is interpolated.

In the optical disk device operating method according to claim 9 of the present invention, when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at startup, 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 reproduced by the optical pickup while changing the radial tilt amount of the objective lens. 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 photodetector becomes small, is obtained, the optical pickup is moved to the outer circumference side of the optical disc, and the outer circumference of the optical disc is Read the radial tilt amount on the outer peripheral side of the objective lens of the optical pickup recorded in the side drive test zone, Test recording is performed on the outer periphery of the optical disk 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 performed without changing the radial tilt amount of the objective lens. Then, the radial tilt value on 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 of the optical pickup is reduced is obtained, and the recording Z reproduction on the optical disc is performed. Sometimes, 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 at times. .

[0017] In the optical disk apparatus operating method according to claim 10 of the present invention, when the optical disk is accessed via an optical pickup and information is recorded or reproduced, the optical disk is rotated at startup, Test recording is performed on the inner periphery of the optical disc by changing the radial tilt amount of the objective lens of the optical pickup S, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens. Output of 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 force signal is reduced is obtained, the optical pickup is moved to the outer peripheral side of the optical disc, and the outer peripheral drive test zone of the optical disc is The recorded radial tilt amount on the outer peripheral side of the objective lens of the optical pickup is read, and the radial tilt amount of the objective lens is changed within the range including the read radial tilt amount on the outer peripheral side. Test recording is performed on the outer periphery, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the jitter component in the RF signal obtained by processing the output signal of the optical detector of the optical pickup is reduced. The outer peripheral radial tilt value of the objective lens is obtained, and the inner peripheral radial tilt value is recorded during recording Z playback on the optical disc. Depending on the radial position belt value in the optical disc of the outer peripheral side radial tilt values and sometimes of the optical pickup, you and interpolating the radial tilt amount of the objective lens.

[0018] An optical disk device according to claim 11 of the present invention is characterized in that the optical disk device operating method according to any one of claims 1 to 10 is executed.

The invention's effect

In the present invention, the optical disk is rotated at startup to obtain the inner peripheral radial tilt value and outer peripheral radial tilt value of the objective lens, and the inner peripheral radial tilt value is determined during recording Z reproduction on the optical disk. Since the radial tilt amount of the objective lens is interpolated according to the radial tilt value on the outer peripheral side and the radial position of the optical pickup on the optical disc from time to time, an optical disc that has warped in the radial direction within the disc surface. Even if this is the case, it is possible to achieve recording Z playback that is more appropriate than before.

Brief Description of Drawings

FIG. 1 is a flowchart at the time of starting (Embodiment 1) of the optical disk apparatus operating method of the present invention.

FIG. 2 is a configuration diagram of an optical disc apparatus adopting the optical disc apparatus operating method of the embodiment. FIG. 3 is a flowchart at the time of starting (Embodiment 2) of the optical disc apparatus operating method of the present invention.

FIG. 4 is a flowchart at the time of starting (Embodiment 3) of the optical disk apparatus operating method of the present invention. Figure

BEST MODE FOR CARRYING OUT THE INVENTION

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

[0022] Here, a DVD-RAM in which data can be overwritten as an optical disk will be described as an example, but the present invention can be similarly applied to other optical disks in which data can be overwritten.

[0023] (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 disk startup procedure 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, and an objective lens that focuses the laser light on the surface of the optical disk. 5 and a photodetector 6 that generates a received light signal based on the reflected light from the optical disk 1 of the laser light collected by the objective lens 5 and a tracking feature that drives the objective lens 5 in the radial direction of the optical disk 1. A focus actuator 8 that drives the objective lens 5 in the vertical direction of the optical disk 1, and a tilt actuator 9 that drives the objective lens 5 against the warp in the radial direction of the optical disk 1. It is configured.

The tracking drive signal generating means 14 for generating a tracking servo signal for the objective lens 5 to follow the track of the optical disc 1 based on the light reception signal output from the photodetector 6 is an output signal of the photodetector 6. The TE signal processing unit 10 performs tracking error processing, converts it to analog Z digital conversion 1, and drives the tracking actuator 7 via the first servo filter circuit 12 and the first driver 13. It is configured

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 is output from the photodetector 6. The signal is processed by the FE signal processing unit 15 for focus error, and this signal is converted to digital by analog Z digital conversion 1, and the first servo filter circuit 12 and the second driver are converted. The focus actuator 8 is configured to be driven through 16.

[0027] The spindle control generating means 22 for controlling the optical disk 1 to a predetermined number of revolutions is based on the received light signal output from the photodetector 6 after the objective lens 5 has inserted the focus servo into the optical disk 1. Therefore, based on the RF signal generated by the RF signal processing unit 18 and the received light signal output by the photodetector 6 after the objective lens 5 has inserted the focus servo into the optical disk 1 Based on the wobble signal generated by the wobble signal processing unit 19, a spindle control signal is generated via the second servo filter circuit 20, and further the disk motor 2 is driven via the spindle drive unit 21. It is configured to

[0028] 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 section 18 with the jitter detecting section 23, and this jitter value. The radial tilt amount of the tilt actuator 9 is changed via the first servo filter circuit 12 and the third driver 24 so that becomes the minimum value.

[0029] It should be noted that the data used to determine the radial tilt amount at the time that the tilt actuator control means 25 instructs is read from, for example, the memory 27 provided in the system control unit 26 that performs the start control. This is supplied to the first servo filter circuit 12. The system control unit 26 obtains the position information in the radial direction (radial direction) of the optical disc 1 that the optical pickup 3 accesses from time to time, and obtains the number of tracks crossed by the optical disc 1 when accessing it. Configured for use in determining tilt amount! RU

Reference numeral 28 denotes a laser emission control circuit that controls the laser power emitted from the light source 4, and the operation is controlled by the system control unit 26.

FIG. 1 shows a flowchart for starting the system control unit 26 when a DVD-RAM is used as the optical disk 1 as a model. Test recording is performed on the inner periphery of the optical disk 1 in steps S 12 to S 14. It is the feature of steps S16 to S19 that only need to detect the jitter best point, and the jitter best point is detected by performing test recording even on the outer periphery of the optical disc 1. Unlike the

[0032] Each step of Fig. 1 executed upon activation will be described in detail.

[0033] 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.

[0035] In step S3, the autofocus mechanism is turned on, and the focus servo is inserted into the focus servo in order to focus the information surface portion of the optical disc 1 by the focus error signal generation means 17.

In step S 4, center learning is performed to adjust the amplitude and symmetry of the tracking error signal in order to avoid the occurrence of tracking servo instability due to variations in the optical pickup 3.

In step S 5, 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 disk 1.

[0038] In step S6, learning is performed to obtain an optimum servo gain for the purpose of keeping the focus and tracking servo stable.

[0039] In step S7, the optical pickup 3 is moved to the embossed area A of the optical disc 1, and reading is executed to determine the type of media and its size capacity.

[0040] In step S8, control data including information for ensuring the recording quality of the optical disc 1 is acquired.

[0041] In step S9, the optical disk 1 moves to the data portion of the playback / recording area of the inner periphery side drive test zone B.

[0042] 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. To do.

In step SI 1, test recording is performed in the inner circumference side drive test zone B, the optimum recording power with the best recording quality is learned, and the recording power is set.

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 the radial tilt amount.

In step S 13, the tilt component control means 25 reproduces the inner drive test zone B while changing the radial tilt amount of the objective lens 5 to minimize the jitter component detected by the jitter detector 23. The radial tilt value of the objective lens is detected, and a voltage or current is applied to the tilt actuator 9 to provide the best chill on the innermost circumference of the disc. Set to the default value.

[0045] In step S14, the best inner tilt value detected in step S13 is stored in the memory 27.

fe. .

[0046] In step 15, the optical pickup 3 is placed on the outer periphery in order to examine the defect information on the optical disc 1 in the innermost diffate management area (DMA) and also in the outermost peripheral position of the optical disc. Move and examine the DMA on the perimeter.

[0047] In step S16, in the outer peripheral drive test zone D of the optical disc 1, as in step S12, test recording is performed with the optimum recording power while keeping the radial tilt amount of the objective lens 5 constant without changing. To do.

[0048] 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 and the outer peripheral side is detected. Set to the best tilt value.

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.

[0050] In step S19, the inner peripheral radial tilt value stored in memory 27 in step S14, the outer peripheral radial tilt value stored in memory 27 in step S18, and the user area of this optical disc 1 Based on the position of each section obtained by dividing C into a plurality of sections in the radial direction (radial direction), the tilt value of each section is calculated by a straight line or quadratic approximation and set in the memory 27.

[0051] When the optical pickup 3 starts up in this way, the optical pickup 3 accesses the user area C of the optical disc 1 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 that the read optimum tilt value is obtained, and the optimum recording Z playback is realized.

[0052] 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 kept constant without being changed. In steps S13 and S17, the radial tilt amount of the objective lens 5 is recorded. The force at which the optimal radial tilt value was detected by playing the optical disc 1 while changing the value of at least one of steps S12 and S16 was recorded on the optical disc 1 while changing the radial tilt amount of the objective lens 5, and step S13 In step S17, the test recorded while changing the radial tilt amount is played back with the objective lens 5 radial tilt amount kept unchanged, and the tilt value at which the jitter value is minimized is detected. A test record recorded without changing the radial tilt amount can be reproduced by changing the radial tilt amount of the objective lens 5 to detect the tilt value at which the jitter value is minimized.

[0053] (Embodiment 2)

FIG. 3 shows a flowchart of the optical disk apparatus operating method according to (Embodiment 2) of the present invention.

Note that 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. If there is a pit in the embossed area A, the RF signal can be detected by reproducing the embossed area A, jitter measurement is possible, and the inner radial radial tilt value can be obtained by the embossed area A.

In (Embodiment 1) shown in FIG. 1, test recording is executed in step S 12 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 this (Embodiment 2), after obtaining 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. Jitter is measured by the jitter detector 23 while changing the radial tilt amount of the objective lens 5 by applying voltage or current to the tilt actuator 9 and the jitter value becomes the minimum value. The radial tilt value is stored in memory 27 in step S14.

[0056] Step S9 to step S11 executed after step S14 are the same as step S9 to step SI1 of (Embodiment 1) shown in FIG. Subsequent to step S11 in FIG. 3, steps S15 to S18 of (Embodiment 1) shown in FIG. 1 are executed, and in step S19 following step S18, the data is stored in the memory 27 in step S14. The inner radial tilt value, the outer 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 this optical disk into multiple sections in the radial direction (radial direction). Based on the above, 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 memory 27 is accessed from the memory 27 every time the optical pickup 3 accesses. The tilt actuator control means 25 is operated so that the read optimum tilt value is obtained, and the optimum recording Z playback is realized.

[0058] 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 not changed, and in step S17, the optical disc is changed while changing the radial tilt amount of the objective lens 5. 1 was reproduced and 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 radial tilt amount of the objective lens 5 was kept constant without changing it. A tilt value that minimizes the jitter value can be detected by reproduction.

[Embodiment 3]

FIG. 4 shows a flowchart of the 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 at each start-up, and this (Embodiment 3) is shown in FIG. However, the difference is that the tilt value itself is recorded directly on the disc and the value is read and set at the next startup.

Specifically, step S1 to step S11 in FIG. 4 are the same as in FIG. In FIG. 4, a routine of step S21 and step S22, which is provided in FIG. 1 between step S11 and step S12, is inserted.

That is, following step S 11, in step S 21, reading of 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 executed and stored in the memory 27. To do.

[0063] In step S22, the tilt actuator controller 25 is operated to set the tilt actuator 9 so that the inner radial radial tilt value read in step S21 is obtained.

[0064] Next to step S22, in step S12, the radial tilt amount of the object lens 5 is set in the inner drive test zone B! / The inner radial tilt value set in step S22. At the center, test recording is performed with the optimum recording power while changing by the tilt actuator control means 25 only for the radial tilt values before and after that.

[0065] In step S13, while maintaining the radial tilt amount of the objective lens 5 unchanged, the inner peripheral side drive test zone B is reproduced, and the jitter component detected by the jitter detector 23 is minimized. Then, the radial tilt value of the objective lens 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 disc.

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.

[0067] Following step S23, in step S14, the best inner-side tilt value detected in step S13 is stored in the memory 27.

[0068] In step 15, the optical pickup 3 is placed on the outer periphery in order to examine the defect information on the optical disc 1 in the innermost diffuse management area (DMA) and to examine the DMA that is also present at the outermost peripheral position of the optical disc. Move and examine the DMA on the perimeter.

[0069] In step S24, in step S24, in step S24, 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 disc 1 is read and stored in the memory 27. To do. In step S25, the tilt actuator controller 25 is operated to set the tilt actuator 9 so that the outer peripheral radial tilt value read in step S21 is obtained.

[0070] Next to step S25, in step S16, in the outer periphery side drive test zone D, the radial tilt amount of the object lens 5 is adjusted around the outer peripheral radial tilt value set in step S25. Test recording is performed at the optimum recording power while changing the tilt tilt controller control means 25 only for the front and rear radial tilt values.

[0071] In step S17, while maintaining the radial tilt amount of the objective lens 5 unchanged, the outer peripheral drive test zone D is reproduced, and the jitter component detected by the jitter detector 23 is minimized. At this time, the radial tilt value of the objective lens 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.

[0072] Following step S17, in step S26, 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. [0073] Following step S26, in step S18, the best tilt value on the outer peripheral side detected in step S17 is stored in the memory 27.

In step S 19, the inner peripheral radial tilt value stored in memory 27 in step S 14, the outer peripheral radial tilt value stored in memory 27 in step S 18, and the user area of this optical disc 1 Based on the position of each section obtained by dividing C into a plurality of sections in the radial direction (radial direction), the tilt value of each section is calculated by a straight line or quadratic approximation and set in the memory 27.

[0075] In this way, at the next start-up, the inner peripheral radial tilt value recorded in step S23 is read out in step S21, and in step S12, the inner peripheral radial tilt value read out in step S21 is the center. The optimum radial tilt value can be detected simply by performing test recording at the optimum recording power while changing the tilt tilt controller control means 25 only to the radial tilt values before and after that.

[0076] Further, the outer peripheral radial tilt value recorded in step S26 is read out in step S24 at the next start-up, and in step S16, read out in step S24, but the outer peripheral radial tilt value is centered on the outer peripheral radial tilt value. The optimum radial tilt value can be detected only by performing test recording with the optimum recording power while changing the tilting actuator control means 25 only to the front and rear radial tilt values.

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. In this embodiment, only one of the radial radial tilt value or the radial radial tilt value on the outer circumferential side is recorded on the optical disc 1, and the processing of the inner radial radial tilt value or the outer radial radial tilt value that is not recorded is performed (see Embodiment 1). ) And can be realized.

[0078] (Embodiment 4)

In each of the above embodiments, the radial tilt value of the objective lens 5 during recording Z playback corresponding to the radial warp of the optical disc 1 used is substantially the same as the radial tilt value for the group and the radial tilt value for the land. Therefore, in the case of a group, measurement is performed in steps S13 and S17 in FIG. 1, measurement is performed in step S17 in FIG. 3, measurement is performed in steps S13 and S17 in FIG. , Step S19 in Figure 4 The same interpolation data is used for recording Z playback not only for group recording z playback but also for the land Z that is obtained by the radial tilt value obtained in step 1. However, the radial tilt value is measured separately for the group and land. Thus, the tilt value of the objective lens 5 can be stored individually. Specifically, in step S13 and step S17 in FIG. 1 or FIG. 4, the radial tilt value of the objective lens 5 is obtained for the group, and the radial tilt value of the objective lens 5 is obtained for the land. Recording the group in the user area C of the optical disc 1 based on the inner radial tilt value and the group's outer radial tilt value. Data for interpolating values is stored in the memory 27, and further based on the inner peripheral radial tilt value of the land and the outer peripheral radial tilt value of the land! Then, data for interpolating the radial tilt value of the objective lens 5 at the time of recording / reproducing the land in the user area C of the optical disc 1 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 group, and the radial tilt value of the objective lens 5 is obtained for the land. In step S19, the radial tilt value is obtained in step S14. Based on the inner circumference radial tilt value obtained from embossed area A and the group obtained in step S17! /, And the outer circumference radial tilt value obtained in step S17! /, Record the group of user area C on optical disc 1. Data for interpolating the radial tilt value of the objective lens 5 at the time of Z playback is stored in the memory 27, and the inner peripheral radial tilt value obtained from the embossed area A in step S14 and the land obtained in step S17 are stored. Based on the outer peripheral radial tilt value! /, Record the land in the user area C of the optical disc 1 Z The radial tilt of the objective lens 5 sometimes during playback Stores the data to be interpolated in memory 27.

[0080] (Embodiment 5)

In (Embodiment 4), the radial tilt value of each of the group and land is obtained, and when recording / reproducing the group in the user area C of the optical disk 1, recording / reproducing the group from the memory 27 sometimes Data for interpolating the radial tilt value of the objective lens 5 is read and controlled to the radial tilt value of the objective lens 5, and the land in the user area C of the optical disc 1 is recorded. When recording a land Z Playback Force to read the data to interpolate the radial tilt value of each objective lens 5 and control it to the radial tilt value of objective lens 5 Recording the group and land of user area C of optical disc 1 Radial tilt value of objective lens 5 during playback Can also be implemented by controlling the radial tilt value of the objective lens 5 for the group and the intermediate value between the radial tilt value of the objective lens 5 for the land.

Industrial applicability

The optical disk apparatus operating method of the present invention is an optical disk apparatus provided with 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. Can contribute to recording Z playback.

Claims

The scope of the claims

[1] 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,

During recording Z playback on the optical disk, the radial tilt amount of the objective lens is set according to the radial tilt value on the inner peripheral side, the radial tilt value on the outer peripheral side, and the position of the optical pickup in the radial direction of the optical pickup at times. Interpolate

Optical disk apparatus operating method.

[2] When recording or reproducing information by accessing the optical disc 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 circumference side of the objective lens in which the jitter component in the RF signal that is reproduced by the optical pickup and processed the output signal of the optical pickup optical detector 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 radial tilt value on the outer peripheral side 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,

Optical disk apparatus operating method.

[3] When recording or reproducing information by accessing an optical disk via an optical pickup,

At startup, the optical disk is rotated, and the optical pickup objective lens radial Test recording is performed on the inner periphery of the optical disk while changing the tilt amount, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the output signal of the optical pickup optical detector The radial tilt value of the inner circumference side of the objective lens, in which the jitter component in the processed RF signal 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 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 in which the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the photodetector is reduced,

Optical disk apparatus operating method.

[4] When accessing or recording information from an optical disc via an optical pickup,

At startup, the optical disk is rotated to change the radial tilt amount of the objective lens of the optical pickup, and the jitter component is reduced when the embossed area of the inner peripheral part of the optical disk is reproduced. Find the side radial 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 changed 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 which the jitter component in the RF signal reproduced by the optical pickup and processing the output signal of the optical detector is reduced,

Optical disk apparatus operating method.

[5] Access to the optical disk via an optical pickup to record or reproduce information In doing so,

Optical disk apparatus operating method.

[6] When recording or reproducing information by accessing the optical disc via an optical pickup,

At startup, the optical disk 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 disk is read, and the read inner radial radial tilt is read Test recording on the inner periphery of the optical disc while changing the radial tilt amount of the objective lens within a range including the amount, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. Obtain the radial tilt value on the inner circumference side of the objective lens by reducing the jitter component in the RF signal that processed the output signal of the optical pickup photodetector.

The optical pickup is moved to the outer peripheral side of the optical disc, the radial tilt amount of 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 of 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 the range including, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. In the RF signal processed from the output signal of an optical detector The outer peripheral radial tilt value of the objective lens with a small component is obtained, and when recording on the optical disk Z, the inner peripheral radial tilt value and the outer peripheral radial tilt value, and the radius of the optical pickup of the optical pickup from time to time are recorded. Interpolate the radial tilt amount of the objective lens according to the direction position

Optical disk apparatus operating method.

[7] When recording or reproducing information by accessing the optical disc via an optical pickup,

At startup, the optical disk 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 disk is read, and the read inner radial radial tilt is read Test recording on the inner periphery of the optical disc while changing the radial tilt amount of the objective lens within a range including the amount, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens, Obtain the radial tilt value on the inner circumference side of the objective lens by reducing the jitter component in the RF signal that processed the output signal of the optical pickup photodetector.

Optical disk apparatus operating method.

[8] When recording or reproducing information by accessing an optical disk via an optical pickup,

At startup, the optical disk 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 disk is read, and the read inner radial radial tilt is read The objective lens within a range including Test recording is performed on the inner periphery of the optical disc while changing the radial tilt amount, and this is reproduced by the optical pickup without changing the radial tilt amount of the objective lens, and the output signal of the optical pickup optical detector The jitter component in the processed RF signal is reduced, and the radial tilt value on the inner circumference side of the objective lens is obtained.

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. Obtain the radial tilt value on the outer periphery side of the objective lens, where the jitter component in the RF signal that is reproduced by the optical pickup and processed the output signal of the optical detector is reduced,

Optical disk apparatus operating method.

[9] When accessing or recording information from an optical disc via an optical pickup,

The optical pickup is moved to the outer peripheral side of the optical disc, the radial tilt amount of 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 of 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 the range including, and reproducing it with the optical pickup without changing the radial tilt amount of the objective lens. Obtain the radial tilt value on the outer peripheral side of the objective lens, where the jitter component in the RF signal that processed the output signal of

Recording on the optical disc During Z playback, the inner peripheral radial tilt value and the outer peripheral side The amount of radial tilt 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 disc from time to time.

Optical disk apparatus operating method.

[10] 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 periphery 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 circumference side of the objective lens in which the jitter component in the RF signal that is reproduced by the optical pickup and processed the output signal of the optical pickup optical detector is reduced,

Optical disk apparatus operating method.

[11] The optical disc apparatus operating method according to any one of claims 1 to 10 is configured to be executed.

Optical disk device.