JPH10124930A - Optical disk medium and optical disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to stably reproduce or record information of all sectors registered in zones by segmenting respective zones so as to start from grooves and to end at the grooves and providing prepit regions with the usable and nonusable information of these sectors. SOLUTION: The groove tracks and land tracks of the optical disks continue alternately at every one round and both record the information. The number of the sectors increases from the inner periphery toward the outer periphery. The respective sectors consist of the first to third zones 150, 152, 154 and first and second buffer zones 151, 153 and are provided with the prepit regions 130 to 135 at the respective tops. The zone 150 is continuous with the groove sector(GS) 100, the land sector(LS) 101, the GS 102 and the zone 151 is continuous with the LS 103, 104. The zones 151, 153 are not for recording and reproducing. The prepit regions comprises address regions and servo regions. As a result, the stable reproduction is made possible without the lose of the recorded information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk medium recordable on both a land portion and a groove portion, and an optical disk device for recording and reproducing the optical disk medium.

[0002]

2. Description of the Related Art In recent years, the information processing speed has been dramatically improved with the increase in the computing power of computers and the like. As a result, a large amount of information can be easily handled. There is great expectation for inexpensive optical recording media. In order to satisfy the demand for the optical storage medium, it is necessary to improve the recording density. As one of means for improving the recording density, as disclosed in JP-A-8-87777,
A method has been proposed in which land portions and groove portions are alternately connected for each turn, are continuously arranged on one spiral on an optical disk medium, and are recorded on both land tracks and groove tracks. Further, as one of the methods of recording addresses on land tracks and groove tracks, in the conventional example shown in Japanese Patent Application Laid-Open No. 7-50014, a land is called a concave shape, and a groove is called a convex shape. The meaning is the same. JP-A-7-50014 is cited as a conventional example and will be described later. Address information is recorded in pits wobbled with respect to the center lines of the land guide groove and the groove guide groove, and identification information formed so as to extend over both the land guide groove and the groove guide groove in order to identify a recording area. And two servo information pits symmetrical with respect to the center line of the land guide groove and separated in the track direction. Further, address information has been proposed in which the number of sectors per round is changed from the inner zone to the outer zone.

An apparatus for recording or reproducing information by mounting the above-described optical disk on an optical disk apparatus will be briefly described. The optical disk medium is attached to a rotation shaft of a spindle motor and is rotated at a predetermined rotation speed. A light beam generated from a light source such as a semiconductor laser is collimated by a collimator lens, then converged by an objective lens via a half mirror, and irradiated onto an optical disk medium. The light reflected from the optical disk medium is reflected by a half mirror, passes through an objective lens, and is irradiated on a photodetector. The light applied to the photodetector is converted into a current. Photodetector 2
It has a split structure, this output is input to each I / V converter that converts current to voltage, the output of the I / V converter is input to the differential amplifier, and the differential amplifier A signal corresponding to the difference is output. The output of the differential amplifier is a signal representing the positional deviation between the light beam converged on the optical disk medium and the land / groove track, and is input to the tracking control circuit to perform arithmetic processing and control the tracking servo.

[0004] The objective lens is attached to the movable part of the actuator. The actuator is composed of a tracking coil provided in the movable part and a permanent magnet attached to the fixed part.When an electric current flows through this coil, the objective lens is driven by the electromagnetic force received by the coil. Movable in the vertical direction of the optical disk medium,
The light beam applied to the information recording section of the optical disk medium is controlled so as to always be in a predetermined convergence state. A tracking coil is also attached to the actuator coil, and control for performing tracking is also performed in the radial direction of the optical disk medium.

An optical pickup having an objective lens, a half mirror, a collimator lens, a light source, a photodetector, and an I / V converter is attached to the carriage. The carriage is driven by a linear motor in the radial direction of the optical disk medium. Moving.

The output of the I / V converter is also input to the adder,
The adder outputs a pit signal in the ID area and a signal corresponding to the wobble pit in the servo area. With this output signal, the sector address is read from the pre-pit area, and the data address of the optical disc medium is changed to the groove track,
The land track is used in common, and the tracking polarity is used to determine between the two.

[0007] Further, the amount of tracking deviation is detected from the servo area, an operation is performed by an arithmetic circuit, and a control signal is sent to a tracking coil of an actuator via a drive circuit. It is controlled to be irradiated. The signal of the differential amplifier is sent to a linear motor via a polarity switching circuit, a phase compensation circuit, and a drive circuit, and is controlled so that the objective lens moves to the center of the track in a natural state.

[0008]

However, in order to use a common address recording portion for the groove sector and land sector as the sector address and to use the tracking polarity together as the sector address information, one piece of address information is stored in the pits. If the address information cannot be recognized due to lack of data, contamination of the medium, deviation of address reading synchronization, etc., there is a problem that both the land sector and the groove sector of the same address become unusable sectors. In order to avoid this problem, if the address information of the corresponding sector is arranged independently, the following problems occur.

This problem will be described with reference to FIG. FIG. 18 is a partially enlarged view of a zone of an optical disk medium and an area where the zone is adjacent. 110c is a groove information area for reproducing or recording information, 110a is an address information pit of the groove information area 110c, 110b is a servo information pit of the groove information area 110c, 113c is a land information area for reproducing or recording information, 113
a is the address information pit of the land information area 113c, 11
3b is a servo information pit in the land information area 113c, 11
6c is a groove information area for reproducing or recording information, 116a is an address information pit of the groove information area 116c, 116b is a servo information pit of the groove information area 116c, and 160 is a track that scans over a track and determines the amount of light reflected from the optical disk medium. The light beam 170 to be obtained is a recorded information pit recorded in the land information area 113c. Here, when the light beam 160 scans the land information area 113c, the recording information pit 170 having recording information and the address information pit 116a or the servo information pit 1
16b overlap and the amount of reflected light received by the light beam 160 is
Due to the influence of the address information pits 116a and the servo information pits 116b in addition to the original reflected light of the recording information pits 170, the amount of reflected light was attenuated and the Kerr rotation effect was reduced due to the birefringence component, and the light beam 160 was obtained. With the amount of reflected light, it becomes difficult to reproduce recorded information. Similarly, at the time of recording, the recording information pit 1 is affected by the address information pit 116a or the servo information pit 116b.
It interferes with the formation of 70.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide an optical disk medium capable of stably recording and reproducing information on and from an information area of the optical disk medium.

It is another object of the present invention to provide an optical disk drive capable of stably recording and reproducing using the optical disk medium.

[0012]

According to the first, second, third and fourth aspects of the present invention, the information recording area of the optical disk medium is effectively utilized, and the recording or reproduction becomes unstable. Is to solve. Specifically, to effectively utilize and solve the problem of instability, as described below, for a sector in which reproduction or recording is unstable, a zone configuration in which the sector is not used is used. Alternatively, devising the arrangement of pre-pits that cause instability,
Eliminate instability factors.

Here, terms used in the description of the present invention will be described. The groove track is a track provided with a concave groove on the optical disk medium, and the land track is a track provided with a convex groove on the optical disk medium. Generally, when a groove track is formed, a land track is formed between the groove tracks. Further, a sector provided on a groove track is called a groove sector, and a sector provided on a land track is called a land sector. The groove sector and the land sector are collectively called a sector. Each sector has address information and servo information for servo as corresponding position information on the optical disk medium, and these concave pits are collectively called pre-pits.

The optical disk medium according to the present invention records or reproduces information in both the land sector and the groove sector. The address information and the servo information of each of the land sector and the groove sector are independently read during the premastering. By forming as pits and servo information pits and preformat recording, it is possible to realize that the land sector and the groove sector have independent sector address information pits and servo information pits. At least one zone that starts with a groove track and ends with a groove track is formed. At this time, by providing the address information pits with the function of servo information, the address information and the servo information can be obtained, and the recording of the servo information pits can be omitted.

According to the second aspect of the present invention, a groove sector provided on a groove track or a land sector provided on a land track is usable or unusable in a land sector. Is preformatted into a row of address information pits, and information indicating that the sector is unusable for sector access is formed as a prepit.

According to the third aspect of the present invention, in a zone format optical disk medium, in a land sector in which a zone for zone switching is adjacent to a zone, only prepits composed of address information pits and servo information pits are not preformatted. Things. Alternatively, only the pre-pits of the groove sectors adjacent to each other are not pre-formatted.

Further, as in the fourth aspect of the present invention, only the pre-pits of the groove sector where the zone is adjacent to the zone of the zone format optical disk medium are recorded on the track center line of the groove sector.
Alternatively, only the pre-pits of the land sector adjacent to the zone for which the zone is switched are recorded on the track center line of the land sector.

Both of the inventions according to claims 5, 6, 7 and 8 solve the problem that the recording or reproduction in the information recording area of the optical disk medium becomes unstable. Specifically, claim 1, claim 2, claim 3
Alternatively, for each sector in which reproduction or recording becomes unstable using each of the optical disk media according to claim 4, a block configuration not using the sector is used so that the optical disk apparatus does not perform recording or reproduction in the unstable sector. ,
It is to manage and operate physical block addresses and logical block addresses in correspondence, and for sectors where the arrangement of pre-pits that cause instability is devised, a tracking control holding circuit is provided to eliminate tracking control instability. Alternatively, the tracking control parameter means is prepared, and the tracking control parameter is changed and operated depending on the position where the light beam scans, thereby stabilizing the tracking and recording or reproducing. Claim 1, Claim 2, Claim 3, or Claim 4.
The configuration of an optical disk device for stably recording or reproducing each optical disk medium will be described below.

In order to drive the optical disk medium, the optical disk apparatus according to the present invention focuses at least a laser light source on the optical disk medium and detects a servo signal and an information signal from the reflected light; A tracking control means for controlling a light beam position so as to scan on a track, a tracking polarity inversion means for inverting the polarity of a tracking control method when the light beam is on a groove track, and a track servo information prepit or Means for obtaining tracking correction information from the servo information pits of the address information pre-pits is provided. As in the invention of claim 5, the zone of the optical disk medium of claim 1 is defined by a groove track and an area divided by the groove track. System controller to configure as one zone, and The system controller is constituted by storage means for storing a program or table for associating physical block addresses of sectors divided into zones with logical block addresses for actual information management by the system controller. Things.

According to a sixth aspect of the present invention, there is provided an optical disc apparatus in which an optical disc medium pre-formatted with information indicating a usable or unusable sector in an address information pit string is used in an optical disc apparatus. In addition, for each sector, information usable (ok) or unusable (No) is recognized by the address reproducing circuit, and the address information is recognized.
By outputting to the system controller, the system controller can provide a correspondence table of the logical block address and the physical block address on the storage unit. The system controller selects only usable sectors and can associate physical block addresses and logical block addresses of usable sectors. By configuring the storage unit that associates with the system controller that performs the above calculation, it is possible to record or reproduce stable information only in the usable sector.

According to a seventh aspect of the present invention, the groove sector on the groove track adjacent to the zone or the land sector on the land track adjacent to the zone has prepits. When using an optical disk medium that is not used in an optical disk device, the address information of the adjacent sector obtained by the address reproduction circuit is output to the system controller, so that the system controller can determine the pre-pit from the tracking polarity and the address information obtained by the address reproduction circuit. The address of a sector that does not have it is obtained from the operation, and it is possible to associate a non-existent physical block address with a logical block address. When scanning a track in a sector that does not have pre-pits, accurate tracking correction information in the pre-pit area cannot be obtained.Therefore, a tracking control signal holding circuit is provided to prevent tracking correction here. Control and hold the tracking control signal. Further, in addition to holding the tracking control signal, by changing the tracking control parameter by the tracking control parameter means of the tracking control circuit, it is possible to stabilize the tracking in the sector having no pre-pit.

Further, as in the invention of claim 8, the pre-pits of the groove sector on the groove track adjacent to the zone or the land sector on the land track adjacent to the zone may be each When an optical disc medium that is not wobbled from the center line of a groove track or a land track is used in an optical disc device, a tracking control signal holding circuit is provided to stabilize tracking when a light beam scans the track, and a system controller is provided. Control and hold the tracking control signal. In addition to holding the tracking control signal, it is possible to stabilize the tracking in the sector where the pre-pit signal does not wobble from the center line of the track by changing the tracking control parameter by the tracking control parameter means of the tracking control circuit. Becomes

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] Hereinafter, an embodiment of an optical disk medium according to this embodiment and an optical disk apparatus for driving this medium will be described.

FIG. 1 is an external view of an optical disk medium. In the plan view of the optical disk medium, groove tracks and land tracks are alternately and continuously connected for each turn, and information is stored in both the groove tracks and the land tracks. The groove track or land track in one round uses a zone format in which the number of sectors increases from the inner circumference toward the outer circumference. FIG.
FIG. 4 is a partially enlarged view of an area 136 (FIG. 1) of zone 1 provided on the innermost periphery described later. Pre-pit area 14
The pre-pits provided at 6 are arranged around the substantially boundary line between the groove track and the land track. The address information pit 100a describes the sector address of the groove information area 100c. Similarly, the address information pit 101a describes the pre-pit. The sector address of the land information area 101c is described, and the sector address of the groove information area 102c is described in the address information pit 102a. The servo information pit 100b is arranged on an extension of the address information pit 100a, 101b is arranged on an extension of the address information pit 101a, and similarly, the address information pit 102b is arranged on an extension of the address information pit 102a. The groove sector 100 includes an address information pit 100a, a servo information pit 100b, and a groove information area 100c. Similarly, the land sector 101 and the groove sector 102 are composed of respective address information pits, servo information pits, and information areas. When the light beam 160 scans on the center line of the groove sector 100, the address information of 100c can be obtained from the address information pit of 100a. When the light beam 160 scans the center line of the land sector 101, address information of 101c can be obtained from address information pits of 101a. Tracking to a groove track and a land track is controlled by detecting a track shift signal by a push-pull method. However, when scanning a groove track and a land track, the tracking polarities are opposite. Servo area 1
Forty-five servo information pits 100b, 101b, and 102b are provided with control position information for performing tracking servo by a push-pull method, and are controlled based on the amount of light received by a photodetector when the light beam 160 scans. You. The tracking servo of the push-pull method is disclosed in
5014, and the description is omitted here.

FIG. 3 is a diagram in which each sector of the optical disk medium of FIG. 1 is classified into zones and buffer zones. In this embodiment, each sector is composed of three zones and two buffer zones as shown in FIG. 1 and FIG. 3, and the optical disk medium 10 in FIG. The zone configuration will be described in the order of scanning. A first zone 150 shown in FIG. 3 includes a groove sector 100, a land sector 101, and a groove sector 102 with the pre-pit area 130 of zone 1 at the top. Next, there is a first buffer zone 151 formed of a land track, and the first buffer zone is a pre-pit area 1 of zone 2.
31 at the beginning, land sector 103, pre-pit area 1
It is composed of a land sector 104 with 32 at the head. The second zone 152 is the pre-pit area 1 of zone 2.
A groove sector 105 starts with 31 and a groove sector 106 starts with a pre-pit area 132. The next second buffer zone 153 is similarly formed of a land track. The pre-pit area 133 of the zone 3 is headed by the land sector 111, the pre-pit area 134 is headed by the land sector 112, and the pre-pit area 135 is headed by the land sector. 113. Further on the outer circumference,
The pre-pit area 133 of the zone 3 has the groove sector 114 at the head, the pre-pit area 134 has the groove sector 115 at the head, the pre-pit area 135 has the groove sector 116, and so on. The block is divided into a third zone 154 composed of a groove sector 120, a groove sector 121, and a groove sector 122. The difference between the zone and the buffer zone here is that the zone can be recorded or reproduced, and the buffer zone cannot be recorded or reproduced.

In the optical disk medium of the present embodiment, FIG.
, Servo information pits 100b in the servo area 145,
101b and 102b are formed, but the address area 14
4 address information pits 100a and 101a, or
It is also possible to use 101a and 102a as substitutes for servo information pits, and it is possible to have no servo area.

Also, in FIG. 1 of the present embodiment, an optical disk medium in which a groove track and a land track are continuously connected in a spiral in a single line has been described.
An optical disk medium in which two land tracks and groove tracks as shown by 10092z (E) are formed in parallel and spiral, and two land tracks and groove tracks are formed in parallel and concentrically. The same method as in the present embodiment can be used for the optical disk medium described above.

In this embodiment, the first zone, the second zone, and the third zone are divided into three zones, and the first zone is divided into three zones.
The number of sectors around one in the zone is 1, the number of sectors around one in the second zone is two, the number of sectors around one in the third zone is three, and the number of tracks in each zone is three. However, the present invention is not limited to the number of zones, the number of sectors around the number of tracks, and the number of tracks in each zone. Each zone is constituted by a zone starting from a groove track and ending with a groove track. is there. Also,
Needless to say, these ideas can be replaced by sector units.

Next, a method for manufacturing an optical disk substrate according to the present invention will be described. Pre-pit area 146 of optical disk medium
The light beam for forming (FIG. 2) and the light beam for providing the groove track are shifted in advance in the radial direction of the disk medium 10 (FIG. 1) by about a half track pitch. By irradiating each light beam at the timing of cutting the groove track and the prepit while rotating the optical disc medium from the outer circumference side or the inner circumference side of the optical disc medium, the pre-pit area 146 (FIG. 2)
Thus, a substrate having the groove tracks 140 (FIG. 2) is obtained. In the case of manufacturing a ROM, a light beam for information recording is further required, and the light beam for the pre-pit is used by being shifted by about a half track pitch in advance in the radial direction of the disk medium 10 (FIG. 1). Make a stamper in this way,
Substrate duplication by P method and duplication of polycarbonate substrate etc. by injection molding are possible.

Next, a method for manufacturing an optical disk medium will be briefly described. When manufacturing phase change media, by sputtering or vapor deposition on a polycarbonate substrate,
A dielectric layer, a recording material layer, a dielectric layer, and a reflective film layer are formed in this order, and a UV resin or the like is spin-coated on the reflective film to protect the formed film layer, and the protective layer is formed by ultraviolet curing. . In addition, to prevent damage to the polycarbonate substrate on the light beam incident side of the optical disk device due to external factors such as handling and transportation, the substrate surface on the light beam incident side is spin-coated with UV resin, etc. A hard coat may be applied by curing.

As an optical disk medium, a magneto-optical disk medium, a magneto-optical direct overwrite medium (DOW) using a magnetic film, a write-once (OW), a CD-recordable (CD-R) using a dye-based film. ), Etc., and a ROM disk medium in which information is previously recorded in the information area 143 (FIG. 2).

[Embodiment 2] FIG. 4 shows the present invention.
FIG. 4 is a partially enlarged view of a pre-pit area 136 (FIG. 1) of the optical disc medium 10 (FIG. 1) according to “Embodiment 2”. A description of the same contents as in the first embodiment is omitted. Hereinafter, the sector management pre-pit area 146 will be described.
A description will be given of an optical disk medium having information on whether it can be used or not for each sector.

In the present embodiment, the availability information area 14
8 is provided on the servo area 145 side of the address information pit 190 in the track direction, and the usability information area 148 is provided.
In the optical disk device, the usable / non-usable information of the information area 143 can be used or not for each sector, and the information can be recorded by pre-pits, and by reproducing the pre-pit information, the optical disc apparatus can determine usable sectors. Becomes

The address information pit 100a, the usability information pit 100d, and the servo information pit 100b are shifted from each other in the track direction to form a groove information area 100c.
And a pit center on the boundary line of the land information area 101c. Address information pit 101a, usability information pit 101d, servo information pit 101b
Like the address information pits 100a, the availability information pits 100d, and the servo information pits 100b, they are shifted in the track direction to form a groove information area 102c.
The pit center is located on the boundary line between the address information pit 100a, the availability information pit 100d, and the servo information pit 100b. Information area land track 1
It is shifted in the track direction so as not to be adjacent with the center line 01c. Similarly, the address information pit 102a, the usability information pit 102d, and the servo information pit 102b of 102c are also shifted from each other in the track direction.
The pit center is located on the boundary between the groove information area 102c and the land information area 103c.
The address information pit 101a, the usability information pit 101d, and the servo information pit 101b are displaced in the track direction such that the center of the track c is the center line, and the address information pit 101a, the availability information pit 101d, and the servo information pit 101b are not adjacent to each other.

Next, a method of manufacturing the optical disk substrate shown in FIG. 4 of the present invention will be described. The light beam for forming the pre-pits of the optical disk medium and the light beam for providing the groove track are previously displaced by about a half track pitch with respect to the radial direction of the disk medium, and are arranged on the outer peripheral side or inside the optical disk medium. By irradiating each light beam at the timing of cutting the groove track and the prepit while rotating the optical disc medium from the peripheral side, a substrate having the prepit and the groove track can be obtained. When cutting the pre-pit, address data for cutting the address area in advance,
The sector use availability information and the servo information pit position information of the tracking servo are prepared in advance, and the laser beam for groove tracks and pre-pits is irradiated on the substrate in accordance with the rotation synchronization signal of the optical disk substrate. Groove tracks and pre-pits are formed.

In the present embodiment, the availability information pits are provided in all the sectors and the availability of the sectors is determined. However, the availability of the sectors can be determined based on the presence or absence of the availability information pits. is there. Furthermore, in addition to the method of recording the availability information pit at any position in the pre-pit area, a sector management area can be provided, and a table area in which usable or unusable sectors are registered can be provided in the pre-pit. Thus, an effect equivalent to that of the present embodiment can be obtained.

As an optical disk medium, a magneto-optical disk medium, a magneto-optical direct overwrite medium (DOW) using a magnetic film, a write-once (OW), a CD-recordable (CD-R) using a dye-based film. ), Etc., or a ROM disk medium in which information is previously recorded in the information area 143 (FIG. 4).

[Embodiment 3] FIG. 5 shows the present invention.
FIG. 2 is a plan view of an optical disk medium using a zone format in which the number of sectors around track 1 increases from the inner circumference to the outer circumference in the optical disk medium. FIG. 6 is a partially enlarged view of an area 337 where the second zone and the third zone of the optical disk medium of FIG. 5 are adjacent to each other. FIG. 7 is a zone block diagram of an optical disc medium having no pre-pits for a land information area sandwiched between zones in the optical disc medium of FIG.

Hereinafter, the same contents as those of the "first embodiment" of the present embodiment will not be described, and will be described in detail. 331a and 332a of the optical disk medium of FIG.
Is a plane area in which the first zone and the second zone are adjacent to each other, where no pre-pits or groove tracks are formed and the plane area is flat. 333a, 334a
Similarly, the areas 335a and 335a are areas where the second zone and the third zone are adjacent to each other and are flat areas in which no prepits or pregrooves are formed.

Next, the plane area to be specifically targeted is an area 33 adjacent to the second zone and the third zone in FIG.
7 is an enlarged view of FIG. 310c is a groove information area for recording or reproducing information, 310a is an address information pit of the groove information area 310c, 31
0b is a servo information pit in the groove information area 310c. The address information pits and the servo information pits of the land information area 313c are not recorded in the plane area 335a (FIG. 5) adjacent to the next second and third zones. Further, 316c in the third zone on the outer peripheral side is a land information area for recording or reproducing information, 316a is an address information pit of the groove information area 316c, 316b
Denotes servo information pits in the groove information area 316c. Similarly, 319c is a land information area for recording or reproducing information, 319a is an address information pit of the land information area 319c, and 319b is a servo information pit of the land information area 319c. As described above, the optical disk medium of the present embodiment does not have the address information pits and the servo information pits of the land tracks adjacent to each other.

Next, referring to FIGS. 5 and 7, a description will be given of a sector block configuration of a zone in an optical disk medium having no prepits of land tracks adjacent to each other. The optical disk medium is composed of three zones as shown in FIGS. 5 and 7, and the block configuration will be described in the order in which the light beam scans the track from the inner circumference to the outer circumference of the optical disk medium. First
Zone 350 (FIG. 7) is the prepit area 3 of zone 1.
30 includes a groove sector 300, a land sector 301, and a groove sector 302. Next, the second zone 352 (FIG. 7) includes a land sector 303 starting with the pre-pit area 331 of the zone 2, a land sector 304 starting with the pre-pit area 332, and similarly, the groove sector 305 and the groove sector 30.
6, a land sector 307, a land sector 308, a groove sector 309, and a groove sector 310. Further, on the outer periphery, a land sector 311 starting from the prepit area 333 of the zone 3, a land sector 312 starting from the prepit area 334, a land sector 313 starting from the prepit area 335, and thereafter, similarly, the groove sector 314, the groove sector 315, and the groove Sector 316, land sector 317, land sector 31
8, land sector 319, groove sector 320,
The block is divided into a third zone 354 (FIG. 7) composed of a groove sector 321 and a groove sector 322.

In this embodiment, when the light beam 360 of the optical disk device shown in FIG. 6 scans a track of the land information area 313c having no address information pit, the address information bit 316 of the adjacent groove track is used.
By calculating the address of the land information area 313c having no address information pits from the current tracking polarity and the current tracking polarity, it is possible to access the land information area having no address information pits.
Although valid sectors are added to each zone, land sectors having no address information pits can be classified into buffer zones that are not used as zones, as in the first embodiment. The operation of the optical disk device will be described in detail in "Embodiment 9".

Next, a method of manufacturing the optical disk substrate of FIG. 5 will be described. The light beam for forming the pre-pit area of the optical disk medium is shifted from the light beam for forming the groove track by about a half track pitch in advance with respect to the radial direction of the optical disk medium, and the outer circumferential side of the optical disk medium, or By irradiating each light beam at the timing of cutting the groove track and the prepit while rotating the optical disc medium from the inner peripheral side, a substrate having a prepit area and a groove track can be obtained. Prepare address information for cutting and servo information pits for tracking servo as non-cut information in order to avoid providing address information pits and servo information pits of land tracks adjacent to each other when generating address areas in advance. In addition, at the time of cutting, the groove track and the prepit area are formed on the optical disk substrate by irradiating the substrate with laser light for the groove track and the prepit area in accordance with the rotation synchronization signal of the optical disk substrate.

[Embodiment 4] FIG. 8 shows the present invention.
FIG. 3 is a plan view of an optical disk medium using a zone format in which the number of sectors around track 1 increases from the inner circumference to the outer circumference. FIG. 9 is a partially enlarged view of an area 437 where the second zone and the third zone of the optical disk medium of FIG. 8 are adjacent to each other. FIG. 10 is a sector block diagram of each zone in an optical disk medium having no prepits for a land information area sandwiched between zones in the optical disk medium of FIG.

Hereinafter, the same contents as in the "first embodiment" of the present embodiment will not be described, and will be described in detail. The optical disk medium 430b in FIG. 8 is a plane area in which the first zone and the second zone are adjacent to each other and no pre-pits or pre-grooves are formed and are in a flat state.
Similarly, 431b and 432b are areas where the second zone and the third zone are adjacent to each other, and are plain areas in which no prepits or pregrooves are formed and are in a flat state.

Next, an example of a plane area to be specifically targeted will be described with reference to FIG. 9 which is an enlarged view of an area 437 adjacent to the second zone and the third zone in FIG. 408c is a land information area for recording or reproducing information;
Is the address information pit of the land information area 408c;
8b is a servo information pit in the land information area 408c. Next second zone 452 (FIG. 10) and third zone 45
No address information pits or servo information pits in the groove information area 410c are recorded in the plane area 432b (FIG. 8) adjacent to the area 4 (FIG. 10). That is, the groove information area 410c does not have a pre-pit having sector position information and servo information.
Further, a land information area 413c for recording or reproducing information is disposed in the third zone 454 (FIG. 10) on the outer peripheral side, 413a is an address information pit of the land information area 413c, and 413b is a servo of the land information area 413c. Information pit. Similarly, 416c is a groove information area for recording or reproducing information, 416a is an address information pit of the groove information area 416c, and 416b is a servo information pit of the groove information area 416c. The optical disk medium of the present embodiment does not have the address information pits and the servo information pits of the above-described zone adjacent groove tracks.

Next, with reference to FIGS. 8 and 10, a block configuration of a sector of a zone in an optical disk medium having no pre-pit of a groove track adjacent to the zone will be described. The optical disk medium is composed of three zones as shown in FIGS.
The block configuration will be described in the order in which the light beam scans the track on the optical disk medium from the inner circumference to the outer circumference. The first zone 450 (FIG. 10) includes a groove sector 400, a land sector 401, and a groove sector 402 with the prepit area 430 of zone 1 at the top. Next, in the second zone 452 (FIG. 10), the land sector 403 starting from the prepit area 431 of the zone 2, the land sector 404 starting from the prepit area 432, and similarly, the groove sector 405, the groove sector 406, the land sector 407, It is composed of a land sector 408, a groove sector 409, and a groove sector 410. Further, on the outer periphery, the land sector 411 with the prepit area 433 of the zone 3 at the top, the land sector 412 with the prepit area 434 at the top, the land sector 413 with the prepit area 435 at the top, and the like, the groove sector 414 and the groove sector 415.
Third zone 454 composed of groove sector 416, land sector 417, land sector 418, land sector 419, groove sector 420, groove sector 421, and groove sector 422 (FIG. 10).
Is divided into blocks.

In the present embodiment, when the light beam 460 of the optical disk device of FIG. 9 scans over a track of the groove information area 410c having no address information pit, the address information pit 408c of the adjacent land track is used.
And the address of the groove information area having no address information pits is calculated from the current tracking polarity to obtain the groove information area 4 having no address information pits.
Since it is also possible to access 10c, it is added to each zone as a valid sector. However, as in the first embodiment, it can be classified into a buffer zone that is not used as a zone. The operation of the optical disk device will be described in detail in "Embodiment 8".

Next, the method of manufacturing the optical disk substrate shown in FIG. 8 can be manufactured by the same method as that of the "third embodiment", and therefore the description is omitted.

[Embodiment 5] FIG. 1 is a plan view of an optical disk medium, and FIGS. 11 and 12 are partially enlarged views of an area 137 (FIG. 1) where zone 2 and zone 3 in FIG. 1 are adjacent to each other. Hereinafter, an embodiment of an optical disc medium in which a zone format in which the number of sectors increases from the inner circumference to the outer circumference of the optical disc medium, where the zones are adjacent to each other, and the prepits of the groove tracks of the zone which are arranged on the outer circumference side and do not wobble from the center of the track. Will be described.

Hereinafter, the contents of the embodiment of the present invention that are the same as those of the embodiment 1 of the present invention will not be described, and will be described in detail. A specific example in which the prepits of the groove information area are not wobbled will be described with reference to FIG. 11, which is an enlarged view of an area 137 adjacent to the second and third zones in FIG. 510c is a groove information area for recording or reproducing information, 510a is an address information pit of the groove information area 510c, and 510b is a groove information area 510c.
Are servo information pits. A land information area 513c for recording or reproducing information is arranged on the outer peripheral side, 513a is an address information pit of the land information area 513c, and 513b is an servo information pit of the land information area 513c. Further, on the outer peripheral side, a groove information area for recording or reproducing the information of 516c is arranged. 516a is an address information pit in the groove information area 516c, and 516b is a servo information pit in the groove information area 516c. By arranging the address information pits 516a and the servo information pits 516b on the track center line of the groove information area 516c, the light beam 560 is formed.
When scanning over the land information area 513c, since the address information pits 516a and the servo information pits 516b do not protrude over the land information area 513c,
It is possible to perform stable recording and reproduction. Further, the light beam 560 moves on the track of the groove information area 516c.
When scanning is performed, the position information of the groove information area 516c can be obtained by passing over the address information pit 516a.

Next, a method for manufacturing the optical disk substrate of FIG. 11 will be described. The light beam for forming the pre-pit area of the optical disk medium includes a light beam for providing a wobbled pre-pit for the groove track, a light beam for providing a non-wobbled pre-pit for the groove track, and a light beam for providing the groove track. A light beam having a light beam for providing a groove track and providing a wobbled pit with respect to the groove track are shifted by about a half track pitch in the radial direction of the optical disk medium, and a pit that does not wobble is provided with respect to the groove track. The light beam is arranged so as to be shifted from the light beam having the wobbled pits by about a half track pitch in the radial direction of the optical disk medium. By irradiating each light beam at the timing of cutting the groove track and the prepit while rotating the optical disc medium from the outer side or the inner side of the optical disk medium, a substrate having prepits and groove tracks can be formed. . At the time of cutting, a groove track and a pre-pit area are formed on the optical disk substrate by irradiating the substrate with laser light for a groove track and a pre-pit area in accordance with a rotation synchronization signal of the optical disk substrate. Further, by using a beam for providing a groove track and a beam for providing a pit that does not wobble with respect to the groove track, a beam for providing a groove track, or
Either one of the beams provided with pits that do not wobble with respect to the groove track can be used.

Next, FIG. 12 is an enlarged view of an area 137 adjacent to the second zone and the third zone in FIG. 6
08c is a land information area for recording or reproducing information, 608a is an address information pit of the land information area 608c, and 608b is a servo information pit of the groove information area 608c. A groove information area 610c for recording or reproducing information is arranged on the outer peripheral side. 6
10a is an address information pit in the groove information area 610c, and 610b is a servo information pit in the groove information area 610c. Further, a land information area 613c for recording or reproducing information is arranged on the outer peripheral side. 613a is the address information pit of the land information area 613c, 613b
Denotes servo information pits in the ground information area 613c. By arranging the address information pits 610a and the servo information pits 610b on the track center line of the groove information area 610c, when the light beam 660 scans over the land information area 613c,
Since the 10a and the servo information pits 610b do not protrude above the land information area 512c, it is possible to perform stable recording and reproduction. When the light beam 660 scans the track of the groove information area 610c, the light beam 660 passes over the address information pit 610a, and the position information of the groove information area 610c can be obtained.

The method for manufacturing the optical disk substrate shown in FIG. 12 is the same as the method for manufacturing the optical disk substrate shown in FIG.

[Embodiment 6] FIG. 13 is a block diagram of an optical disc apparatus according to Embodiment 6 of the present invention. Reference numeral 10 denotes a track 1 having address information corresponding to both the land sector and the groove sector described in the first embodiment, and extending from the inner periphery to the outer periphery.
An optical disk medium that has been zone-formatted with an increased number of peripheral sectors. Reference numeral 20 denotes a spindle for rotating the optical disk medium 10 at a constant speed or at a constant linear speed. Numeral 30 is a semiconductor laser, 31 is a collimating lens for converting light emitted from the semiconductor laser 30 into parallel light, 32 is a beam splitter placed in a collimated beam, 33 is parallel light transmitted through the beam splitter,
Objective lens for focusing on the upper recording surface, 40 is the objective lens 3
3 and a photodetector that receives the reflected light from the optical disk medium 10 that has passed through the beam splitter 32. The receiving portion divided into two in parallel with the track direction of the disk in order to obtain a tracking error signal comprises 40a and 40b. . 3
An actuator 4 supports the objective lens 33,
30 to 34 are attached to a head base (not shown),
The optical head 35 is configured.

Reference numeral 41 denotes an I / V converter for converting the amount of light detected by the light receiving sections 40a and 40b into a voltage signal.
And 41b. Reference numeral 42 denotes a differential amplifier to which a voltage signal converted into a voltage by the I / V converters 41a and 41b is input, 43 denotes a low-pass filter (LPF) to which a track error signal output from the differential amplifier 42 is input, and 44 Is LPF43
, A pit shift signal input from a differential amplifier 50 described later, and a control signal C4 from a system controller 46 described later,
A polarity inverting circuit for adjusting the polarity to a predetermined polarity and outputting a tracking signal to a tracking control circuit 45 described later;
Reference numeral 8 denotes a light amount detected by the light receiving units 40a and 40b as 41a.
A sum signal which is converted into a voltage by an I / V converter of 41b and outputs a sum signal and outputs a sum signal; 49, a wobble TE detection circuit for detecting a track error from a wobble signal from the sum signal of the sum amplifier 48; Is a differential amplifier that calculates the amount of deviation from the servo information pit from the signal output from the wobble TE detection circuit 49 and the output of the differential amplifier 42, and 45 is the output signal of the polarity inversion circuit 44 and the Control signal C1 is input,
Radial access control circuit 57 and drive circuit 56 which will be described later.
A tracking control circuit that outputs a tracking control signal to the actuator; 56, a driving circuit that outputs a driving current to the actuator 34; 59, a voltage signal of the I / V converter 41a and the I / V converter 41b that is input; Summing amplifier, 60
Is a high-pass filter (HPF) that outputs a high-frequency component of the sum signal input from the addition amplifier 59 to a reproduction signal processing circuit 61 described later. A reproduction signal processing circuit for outputting a signal to an output terminal 62;
The address reproduction circuit outputs an address signal reproduced from a high-frequency component of the sum signal input from the system controller 46 to a system controller 46 described later.

Reference numeral 57 denotes a system controller 4 described later.
A radial access control circuit that outputs a drive current to a radial access motor 58, which will be described later, based on the control signal C3 from the controller 6 and the control output of the tracking control circuit 45. The radial access control circuit 58 moves the optical pickup 35 in the radial direction of the optical disk medium 10. A motor 64 is a recording signal processing circuit that outputs a recording signal generated from an information signal such as a sound input from the external input terminal 63 to an LD drive circuit 65 described later. An LD drive circuit that receives a control signal C2 and a recording signal from the recording signal processing circuit 64 and outputs a driving current to the semiconductor laser 30. The control information c7 is input from the storage means 47 described later, The control circuit 46, LD driving circuit 6
5. Radial access control circuit 57, polarity inversion circuit 4
4. A system controller which outputs a control signal c6 to a storage means 47 described later and outputs an information output a1 to an interface terminal 70;
This is a storage unit to which a control information request C5 is input from and the requested information C6 is output to the system controller 46.

The operation of the optical disk device configured as described above will be described with reference to FIG. Laser light emitted from the semiconductor laser 30 is converted into parallel light by a collimator lens 31, and is focused on the optical disk medium 10 by an objective lens 33 through a beam splitter 32. The light beam reflected from the optical disk medium 10 has information recorded on the optical disk medium by diffraction, passes through the objective lens 33, and is split by the beam splitter 32 into the photodetector 4.
Irradiated on zero. The photodetectors 40a and 40b convert the distribution change of the amount of the incident light beam into a current signal and output the current signal to the I / V converter 41, and further convert the voltage signal into a voltage signal by the I / V converter 41a and the I / V converter 41b. Is converted. The I / V converter 41 converts each voltage signal into each differential amplifier 42,
9. Output to the summing amplifier 48. The differential amplifier 42 extracts the difference signal and outputs it to the LPF 43 and the differential amplifier 50 as a push-pull signal. The output signal of the addition amplifier 48 is sent to a wobble TE detection circuit 49, which detects a track shift based on the wobble amount of the servo information pit or the address information pit and outputs it to the differential amplifier 50. The difference between the push-pull signal of the differential amplifier 42 and the wobble track deviation detection signal of the wobble TE detection circuit 49, which is input to the differential amplifier 50, is calculated and output to the polarity inversion circuit 44 for inverting the tracking polarity. . On the other hand, the LPF 43 extracts a low-frequency component from the push-pull signal output from the differential amplifier 43 and outputs it to a polarity inversion circuit 44 for inverting the tracking polarity.

The polarity inversion circuit 44 selects a tracking error detection signal or a push-pull signal and inverts the polarity based on a control output C4 from a system controller 46 for controlling the system of the optical disk apparatus, and performs a tracking error signal. Is output to the tracking control circuit 45. The tracking control circuit 45 outputs a control signal to the drive circuit 56 and the radial access circuit 57 according to the level of the tracking error signal. The drive circuit 56 supplies a drive current to the actuator 34 according to the control signal, The lens 33 is controlled so as to focus on the track, and it becomes possible to scan a target sector.

On the other hand, the addition amplifier 59 adds the output signal of the I / V converter 41 and outputs it to the HPF 60. After the HPF 60 cuts off unnecessary low frequency components, an address for demodulating and recognizing the sector address is used. The information of the reproduced signal is demodulated to the reproduction circuit 66, and thereafter, the reproduced signal is output to the reproduction signal processing circuit 61 which performs processing such as error correction and outputs to the output terminal 62 as an audio signal or text data. The address reproducing circuit 66 outputs position information on the disk obtained by demodulation to the system controller. Accordingly, when the light beam 160 scans over the information area 143 (FIG. 2), the reproduction of the record information is performed by the reproduction signal processing circuit 61, and the address area 1 is read.
When scanning is performed on the address 44 (FIG. 2), the address reproducing circuit 66
To obtain the address information, and output the position information on the disk to the system controller 46. The system controller 46 can recognize the current position from the position information.

The radial access control circuit 57 controls the control signal c from the system controller 46 when the optical head moves.
The drive current is output to the radial access motor 58 in response to 3 to move the optical head 35 to a target position. At this time, the tracking control circuit 45 also temporarily suspends the tracking servo by the control signal c1 from the system controller 46. At the time of normal reproduction, the radial access motor 58 corresponds to the low frequency component of the tracking error signal input from the tracking control circuit 45.
Is driven to gradually move in the scanning direction of the light beam.

At the time of recording, the recording signal processing circuit 64 adds an error correction code or the like to the audio signal or the like input from the external input terminal 63 and outputs the encoded signal to the LD drive circuit 65 as an encoded recording signal. The system controller 46 supplies control signals
When the LD drive circuit 65 is set to the recording mode by c2, the LD drive circuit 65 modulates the drive current applied to the semiconductor laser 30 according to the recording signal. As a result, the intensity of the light beam irradiated on the optical disk medium 10 changes and a signal is recorded.

On the other hand, at the time of reproduction, the LD is controlled by the control signal c2.
The drive circuit 65 is set to the reproduction mode, and the semiconductor laser 3
The drive current is controlled so that 0 is emitted at a constant intensity. This makes it possible to detect a recording signal and address information on a recording track.

The zone management according to the fifth aspect is usually performed by using a logical block address obtained by replacing the physical block address of the sector address with a logical address. The correspondence between the physical block address and the logical block address is previously stored in a table. There are a method of registering and corresponding, a method of providing a corresponding program, and a method of automatically obtaining by calculation, and a method of having an arithmetic function for pre-corresponding in an operating system not introduced here. Here, an example will be described in which the table of FIG. 14 is provided in the storage means 47 (FIG. 13), and physical block addresses are associated with logical block addresses.

FIG. 14 is a table in which the sectors of the optical disk medium of FIG. 1 are classified into zones, and physical block addresses are associated with logical block addresses. The zoning of each sector for association is performed as follows. The first zone 150 has 100 land sectors on the groove track and 101 land sectors and 102 groove sectors on the groove track. The 103 land sector and the 104 land sector on the land track are classified into the first buffer zone 151. . Next, the second zone is classified into 105 groove sectors on the groove track, 106 groove sectors, 107 land sectors, 108 land sectors, 109 groove sectors, and 110 groove sectors on the groove track. The second buffer zone is composed of 111 land sectors, 112 land sectors, 1 land sector on the land track.
13 land sectors. The next zone starts at 114 groove sectors on the groove track, 115
Third zone 1 including groove sector, 116 groove sector, 117 land sector, 118 land sector, 119 land sector, 120 groove sector, 121 groove sector, and 122 groove sector
Classify into 54. 1st zone 150, 2nd zone 15
Only the blocks classified into the second and third zones 154 are registered in a table corresponding to the logical block address 801, and are managed by the system controller 46 (FIG. 13) as logical blocks in which information can be reproduced or recorded.

Next, the operation of the optical disk device shown in FIG. 13 based on the correspondence between the logical block address and the physical block address shown in FIG. 14 will be described. Based on a control command from the outside, the optical disk device is performed using a system controller 46 (FIG. 13) as a core, which is an arithmetic unit for controlling the entire optical disk device. From the interface terminal 70 (FIG. 13) to the system controller (FIG. 1)
For 3), a reproduction or recording request r1 (FIG. 13) is requested at the address of the logical block address 801 (FIG. 14). The system controller 46 (FIG. 13) stores the logical block address 80 in the storage unit 47 (FIG. 13).
1 (FIG. 14) to the physical block address 800 (FIG. 1).
A conversion information request c6 (FIG. 13) is issued to the storage block 47 (FIG. 13), and information c7 (FIG. 13) of the physical block address 800 (FIG. 14) is performed while performing a process such as a replacement process in some cases. To the system controller 46 (FIG. 1).
3), the system controller 46 (FIG. 13) responds to the physical block address 800 (FIG. 1) of the optical disk medium.
Recording or reproduction is performed on the sector 4). The system controller 46 (FIG. 13) stores the logical block address 801 (FIG. 1) in the storage unit 47 (FIG. 13) again.
4), and outputs the output signal a1 (FIG. 13) to the interface terminal 70 (FIG. 13).

Accordingly, as shown in FIG. 14, in the table of the physical block address 800, only the zone starting from the sector existing on the groove track and divided by the sector existing on the groove track is made to correspond to the logical block address 801. Therefore, there is no need to access the sector existing in the buffer zone provided on the land track adjacent to the zone, and the pits on the information area are not affected by a change in light amount or the influence of birefringence. Recording or reproduction is always performed stably.

[Seventh Embodiment] FIG. 15 is based on the availability information 903 of the “seventh embodiment” according to the sixth aspect.
Physical block address 900 and logical block address 9
01 shows a correspondence table.

In the “Embodiment 7”, the embodiment of the optical disk apparatus using the optical disk medium “Embodiment 2” including the usability information pit in the pre-pit area 146 (FIG. 4) of Claim 2 is described. The description of the circuit configuration and the like having the same contents as in the “sixth embodiment” is omitted and described.

Since the availability information of the sector can be demodulated together with the location information of the sector reproduced by the address reproduction circuit 66 of FIG. 13, the position information of the sector and the availability information of the sector can be combined. Output to the system controller 46. System controller 46
Then, the information is output to the storage means 47 as control information c6, and at the same time, the physical block address 9 as shown in FIG.
A table for associating 00 with the logical block address 901 is provided.

Since the usability information 903 (FIG. 15) is added to the sector position information output from the address reproduction circuit 66 of FIG. 13 via the system controller 45 and output, the physical block address 90 as shown in FIG.
0, and is started from 100 groove sectors based on the information of the availability information 903, and 101
A first zone 150 composed of a land sector and 102 groove sectors, 103 land sectors and 104
A first buffer zone 151 comprising a land sector;
Starting from 105 groove sectors, a second zone 152 composed of 106 groove sectors, 107 land sectors, 108 land sectors, 109 groove sectors and 110 groove sectors, and composed of 112 land sectors and 113 land sectors starting from 111 land sectors. A second buffer zone 153,
Starting from 114 groove sectors, 115 groove sectors, 116 groove sectors, 117 land sectors, 118 land sectors, 119 land sectors, 1
20 groove sectors, 121 groove sectors, 12
It is classified into a third zone 154 composed of two groove sectors. In each case, a table is created based on the usability information 903 based on the availability information 903 so that the logical block addresses 901 correspond one-to-one to only the sectors classified into the zones. The system controller 46 (FIG. 13) can obtain the logical block address 901 and the usable physical block address 900.
Since the optical disc device can access only usable sectors, stable reproduction or recording can be realized.

Here, the block configuration is such that zones and buffer zones are alternately classified. However, in the sector having the usability information 903, it is not necessary to continuously classify in this manner.

[Eighth Embodiment] FIGS. 16 and 17
It is a tracking control circuit and its peripheral circuits. FIG. 6 is a partially enlarged view of an optical disk medium in which a land sector on a land track adjacent to a zone has no prepit.

In the "Embodiment 8", an embodiment of an optical disk apparatus in which a land sector on a land track adjacent to a zone in claim 2 uses an optical disk medium having no pre-pits is described in "Embodiment 6". The description of the circuit configuration and the operation having the same contents as those of "" is omitted.

In the circuit configuration shown in FIG. 16, reference numeral 1000 denotes an input terminal to which a track deviation signal is input, and 1001 denotes an input terminal 1.
The tracking control circuit 1002 receives a tracking deviation signal from the tracking control circuit 1001 and performs tracking control based on the input signal. A tracking control signal holding circuit for holding a tracking control signal based on a control signal input from an input terminal 1003;
004 is an output terminal for outputting a tracking signal controlled by the tracking control signal holding circuit 1002;
Consists of

In the circuit configuration shown in FIG. 17, reference numeral 1000 denotes an input terminal to which a track deviation signal is input, and 1005, a tracking control circuit 1 based on a control signal input from an input terminal 1003 for inputting a control signal.
A tracking control parameter means 1006 for switching the tracking control parameter used in 006, a tracking control circuit 1006 for performing tracking control on the tracking deviation signal from the input terminal 1000 based on the parameter output from the tracking control parameter means, and 1004 for tracking An output terminal for outputting a tracking signal controlled by the control circuit 1006.

The light beam 36 extends along the track center line of the land information area 313c having no pre-pits in the land sector on the land track adjacent to the zone shown in FIG.
When scanning is performed at 0, the sector position information obtained by the address reproducing circuit 66 (FIG. 13) does not include the position information of the groove information recording area 313c. However, the position information can be recognized by reproducing the address information pit 316a of the outer track. Therefore, the position information of the land information area 313c can be obtained by calculation from the tracking polarity for scanning the land track and the address information pit 316a on the adjacent groove track, and the virtual physical block address and the logical block address correspond to each other. By doing so, it is possible to stably reproduce and record information without being affected by pre-pits recorded in the land information area.

A groove sector 310 on a groove track without prepits on one side or a land sector 3 on a land track scanned by the light beam 360 in FIG.
When scanning 13 tracks, since only one side of the prepits are formed in the prepit area, accurate tracking correction information cannot be obtained. Therefore, a circuit is provided for not performing tracking correction in this area.

The circuit operation when tracking correction is not performed will be described with reference to FIG. Tracking control circuit 1
001 is an input terminal 10 to which a track deviation signal is input.
In response to the tracking deviation signal input from 00, a tracking control circuit 1001 outputs a control output for correcting the tracking deviation to a tracking control signal holding circuit 1002.
Output to The tracking control signal holding circuit normally outputs the input track correction signal as it is to the output terminal 1004 as a tracking control output. When the system controller 46 (FIG. 13) recognizes the area of the one-side pit row, a holding signal is input from the input terminal 1003 to the tracking control signal holding circuit 1002, and the tracking control signal holding circuit 1002 cancels the holding signal. By keeping the tracking control output until this time, the tracking is prevented from becoming unstable.

Further, in FIG. 17, the tracking control parameter means is changed only in the area of one side pit row,
An embodiment for preventing the tracking from becoming unstable will be described.

The tracking control circuit 1006 receives the tracking error signal from the input terminal 1000 to which the track error signal is input.
In 006, the tracking control parameter means 1005
Based on the control parameter given by the control unit, a calculation is performed to correct the track deviation, and a tracking control output is output to the output terminal 1004. When the system controller 46 (FIG. 13) recognizes the one-side pit row area,
A control signal is input from an input terminal 1003 to the tracking control parameter means 1005, and the tracking control parameter means 1005 performs settings such as making the sensitivity lower than that in a normal state, and calculates a tracking control circuit 1006 based on the control parameters. Outputting the tracking control output to the output terminal 1004 prevents the tracking from becoming unstable.

Similarly, when the light beam scans the track center line of the land sector 410 on the groove track adjacent to the zone shown in FIG.
The position information of the sector obtained in (FIG. 13) does not include the position information of the groove information recording area 410c. However,
The address information pit 408a of the land sector 408, which is the inner track, can be reproduced to recognize the position information. Therefore, the groove information area 41 is calculated from the tracking polarity for scanning the groove track and the address information pit 408a on the adjacent land track.
0c position information can be obtained, and by associating the virtual physical block address with the logical block address, information can be reproduced and recorded stably without being affected by pre-pits recorded in the information area. Can be. The tracking here is omitted since it has been described above.

[Embodiment 9] FIGS. 16 and 17
And its peripheral circuits.

FIG. 11 is a partially enlarged view of an optical disc medium in which the pre-pits of the groove sectors on the groove tracks adjacent to each other are not wobbled from the center line of each groove track.

FIG. 12 is a partially enlarged view of an optical disk medium in which the pre-pits of the groove sectors on the groove tracks adjacent to each other do not wobble from the center line of each groove track.

In the ninth embodiment, an optical disc medium in which the prepits of the groove sectors on the groove track adjacent to the zone of claim 4 do not wobble from the center line of each groove track or land track is used. About the embodiment of the optical disk device
The description of the circuit configuration and the like having the same contents as in the “sixth embodiment” is omitted and described.

The pre-pits on the groove track adjacent to the zone shown in FIG. 11 correspond to the groove information area 516c.
When the light beam 560 scans the address information pits 516a and the servo information 516b that are not wobbled from the track center line, the address information pit 516a and the servo information pit 516b, which are prepits on one side during scanning, do not wobble. This causes an error in the control output output from the tracking control circuit 45 (FIG. 13).

The pre-pits on the groove track adjacent to the zone shown in FIG. 12 correspond to the groove information area 610c.
Of the light beam 660 on the address information 610a and the servo information 610b that are not wobbled from the center line of the track.
Is a pre-pit row on one side during scanning,
Address information pit 610a and servo information pit 6
Since 10b does not wobble, an error occurs in the control output output from the tracking control circuit 45 (FIG. 13).
Therefore, a circuit for appropriately performing tracking correction at a location where an error occurs in both tracking control outputs will be described.

The circuit configuration of FIGS. 16 and 17 is the same as that described in the "Embodiment 8". A circuit operation when tracking correction is not performed will be described with reference to FIG. Tracking control circuit 1 from input terminal 1000
A tracking deviation signal is input to 001, and an output for correcting the tracking deviation in the tracking control circuit 1001 is output to the tracking control signal holding circuit 1002. The tracking control signal holding circuit 1002 normally outputs the input track correction signal as it is to the output terminal 1004 as a tracking control output. When the system controller 46 (FIG. 13) recognizes an area where one side pit row is not wobble, a holding signal is input from the input terminal 1003 to the tracking control signal holding circuit 1002, and the tracking control signal holding circuit 1002 outputs the holding signal. By maintaining the tracking control output until is canceled, tracking is prevented from becoming unstable.

An embodiment will be described with reference to FIG. 17 in which the tracking control parameter means is changed only during an area where one side pit row does not wobble to prevent the tracking from becoming unstable. A tracking deviation signal is input from the input terminal 1000 to the tracking control circuit 1006.
Based on the control parameter given from the tracking control parameter means 1005, an operation is performed to correct the track deviation, and the tracking control output is output to the tracking control output terminal 1004. When the system controller 46 (FIG. 13) recognizes the one-side pit row area, a control signal is input from the input terminal 1003 to the tracking control parameter means 1005, and the tracking control parameter means makes the sensitivity lower than that in the normal state. The settings are made and output to the tracking control circuit 1006. The tracking control circuit 1006 calculates based on the given tracking control parameter of the tracking control parameter means 1005 and outputs the tracking control output to the output terminal 1004 to prevent the tracking from becoming unstable.

[0091]

As described above, in the present invention,
In an optical disc medium in which a recording film is formed on a disk-shaped substrate on which land tracks, groove tracks, and prepits are transferred and information is recorded on both the land tracks and the groove tracks, both the land tracks and the groove tracks have sectors. An optical disc medium divided into zones and comprising zones, wherein address information pits having address information of a groove sector and a land sector are arranged on a boundary between a land track and a groove track, and the address information pits of the groove sector are More specifically, the present invention relates to an optical disk medium in which address information pits of land sectors are displaced in the track direction and an optical disk device for driving the optical disk medium, and has the following effects.

According to the first aspect of the present invention, there is provided an optical disk medium capable of stably reproducing or recording information of all sectors registered in a zone by dividing each zone so as to start and end with the groove. You can do it.

According to the second aspect of the present invention, by providing the usable or unusable information of the sector in the pre-pit area, reproduction or recording is performed only on the usable sector, and the recorded information is lost. It is possible to provide an optical disk medium capable of performing stable reproduction without any problem.

According to the third aspect of the present invention, by eliminating the pre-pits of the land track or the groove track interposed between the zones, the zone is interposed between the zones. Land truck,
Alternatively, it is possible to provide an optical disk medium capable of performing stable reproduction without losing recorded information even in a groove track.

According to the fourth aspect of the present invention, the prepits of the land track or the groove track sandwiched between the zones are not wobbled, so that the zone is sandwiched between the zones. It is also possible to provide an optical disk medium that can be reproduced or recorded even on a land track or a groove track, and can perform stable reproduction without losing recorded information.

According to the invention of claim 5, using the optical disk medium of claim 1, each zone is divided so as to start from a groove and end with a groove,
By managing the logical block addresses in a one-to-one correspondence, it is possible to provide an optical disk device capable of stably reproducing or recording information of all the sectors registered in the zone.

According to the sixth aspect of the present invention, the physical block address and the logical block address of the usable sector are determined using the optical disk medium according to the second aspect, using the usable / unusable information of the sector in the pre-pit area. One-on-one
Thus, an optical disk device capable of stably reproducing or recording information of all usable sectors can be provided.

According to the seventh aspect of the present invention, the optical disk medium of the third aspect is used to perform scanning even on a land track or a groove track having no prepits between adjacent zones. From the address information and tracking polarity of the adjacent sector from which the light beam can be obtained, a sector address without pre-pits is calculated and recognized from the calculation, so that an optical disc device capable of performing stable recording or reproduction even on a sector without pre-pits. It can be provided.

According to the eighth aspect of the present invention, the tracking error signal for recognizing the state of tracking in the pre-pit area where address information pits and servo information pits are recorded is recorded on the same optical disk medium as to whether or not there is a pre-pit or whether there is a wobble. In an optical disk drive that drives an optical disk medium whose amount varies depending on the location, a means for holding a tracking control signal or a means for changing a tracking control parameter means depending on the state of the pre-pit allows tracking based on the presence or absence of a pre-pit and the amount of wobble. It is possible to provide an optical disk device that prevents instability of the optical disk beforehand and enables stable tracking at all times.

[0100]

[Brief description of the drawings]

FIG. 1 is a plan view showing a format of an optical disk medium of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1 showing a format of an optical disk medium according to the first embodiment of the present invention.

FIG. 3 is a block diagram of FIG. 1 showing a format of the optical disc medium according to the first embodiment of the present invention.

FIG. 4 is a partially enlarged view showing a format of an optical disc medium according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a format of an optical disc medium according to Embodiment 3 of the present invention.

FIG. 6 is a partially enlarged view of FIG. 5 showing a format of an optical disc medium according to Embodiment 3 of the present invention.

FIG. 7 is a block diagram of FIG. 5 showing a format of an optical disc medium according to Embodiment 3 of the present invention.

FIG. 8 is a plan view showing a format of an optical disc medium according to Embodiment 4 of the present invention.

FIG. 9 is a partially enlarged view of FIG. 8 showing a format of an optical disc medium according to Embodiment 4 of the present invention.

FIG. 10 is a block diagram of FIG. 8 showing a format of an optical disc medium according to Embodiment 4 of the present invention.

FIG. 11 is a partially enlarged view showing a format of an optical disc medium according to Embodiment 5 of the present invention.

FIG. 12 is a partially enlarged view showing a format of an optical disc medium according to Embodiment 6 of the present invention.

FIG. 13 is a block diagram of an optical disc device according to a seventh embodiment of the present invention.

FIG. 14 is an address correspondence table provided in storage means of an optical disk device according to a seventh embodiment of the present invention.

FIG. 15 is an address correspondence table provided in the storage means of the optical disk device according to the eighth embodiment of the present invention.

FIG. 16 is a partial view of an optical disk device tracking control circuit of the present invention.

FIG. 17 is a partial view of an optical disk device tracking control circuit of the present invention.

FIG. 18 is a partially enlarged view of an optical disk medium.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Optical disk medium 20 ... Spindle 30 ... Semiconductor laser 31 ... Collimating lens 32 ... Beam splitter 33 ... Objective lens 34 ... Actuator 35 ... Optical head 40a, 40b, Reference Signs List 40 photodetector 41a, 41b, 41 I / V converter 42, 50 differential amplifier 43 low-pass filter (LPF) 44 polarity reversing circuit 45, 1001, 1006 ... Tracking control circuit 46 ... System controller 47 ... Storage means 48,59 ... Addition amplifier 56 ... Drive circuit 57 ... Radial access circuit 58 ... Radial access motor 60 ... High-pass filter (HPF) 61 ... Reproduction signal processing circuit 62,1004 ... Output terminal 63,1000,1003 ... Input terminal 64 ... recording signal processing circuit 65 ... LD drive circuit 66 ... address reproduction circuit 70 ... interface terminal 100,102,105,106,109,110,1
14, 115, 116, 120, 121, 122, 30
0, 302, 305, 306, 309, 310, 31
4, 315, 316, 320, 321, 322, 40
0, 402, 405, 406, 409, 410, 41
4, 415, 416, 420, 421, 422 ... groove sectors 101, 103, 107, 108, 111, 112, 1
13, 117, 118, 119, 190, 301, 30
3, 307, 308, 311, 312, 313, 31
7, 318, 319, 401, 403, 407, 40
8, 411, 412, 413, 417, 418, 419
... Land sectors 100a, 101a, 102a, 110a, 113a, 11
6a, 316a, 319a, 310a, 408a, 413a,
416a, 510a, 513a, 516a, 519a, 60
8a, 610a, 613a ... address information pits 100b, 101b, 102b, 110b, 113b, 11
9b, 191, 310b, 316b, 319b, 408b,
413b, 416b, 510b, 513, 516b, 519
b, 608b, 610b, 613b ... servo information pits 100c, 102c, 110c, 116c, 310c, 31
6c, 409c, 410c, 415c, 416c, 510c,
516c, 610c ... groove information area 101c, 103c, 113c, 313c, 319c, 40
8c, 413c, 513c, 518c, 519c, 608c,
613c, ... land information area 100d, 101d, 102d ... availability information pits 130, 330, 430 ... first zone prepits 131, 132, 331, 332, 431, 432, ...
..Second zone prepits 133, 134, 135, 333, 334, 335, 4
33, 434, 435 ... third zone prepits 137, 337, 437 ... area where the second and third zones are adjacent 143 ... information area 144 ... address area 145 ... servo area 146, 446: Pre-pit area 147: Sector 148: Usability information area 150, 350, 450, ... First zone 151: First buffer zone 152, 352, 452 ... 2 zone 153: second buffer zone 154, 354, 454: third zone 160, 360, 460, 560, 660: light beam 170: recording information pit 331a, 332a, 333a, 334a, 335a, 43
0b, 431b, 432b, 433b, 434b, 435b
.. Plane area 440... Groove track 800, 900... Physical block address 801 901... Logical block address 903... Usability information 1002... Tracking control signal holding circuit 1005. Parameter means

Claims (8)

[Claims] 1. A land track, a groove track, and an optical disk medium in which a recording film is formed on a disk-shaped substrate onto which land tracks, groove tracks, and prepits are transferred, and information is recorded on both the land tracks and the groove tracks. Are divided into sectors,
Moreover, in an optical disc medium including zones, address information pits having address information of a groove sector and a land sector are arranged on a boundary between a land track and a groove track. An optical disc medium, wherein address information pits are shifted in a track direction, and each zone is divided so as to start from a groove and end with a groove. 2. A land track, a groove track, and an optical disk medium in which a recording film is formed on a disc-shaped substrate onto which land tracks, groove tracks, and prepits are transferred, and information is recorded on both the land tracks and the groove tracks. Are divided into sectors,
Moreover, in an optical disc medium including zones, address information pits having address information of a groove sector and a land sector are arranged on a boundary between a land track and a groove track. An optical disc medium wherein address information pits are shifted in the track direction, and information indicating whether the sector management pre-pits can be used or not is given to the pre-pits. 3. A land track, a groove track, and an optical disk medium in which a recording film is formed on a disk-shaped substrate onto which a land track, a groove track, and a prepit are transferred, and information is recorded on both the land track and the groove track. Are divided into sectors,
Moreover, in an optical disc medium including zones, address information pits having address information of a groove sector and a land sector are arranged on a boundary between a land track and a groove track. Address information pits are shifted in the track direction, and a zone format is used in which the number of sectors increases from the inner circumference to the outer circumference of the optical disk medium, and land tracks or groove tracks sandwiched between zones are used. An optical disc medium having no address information pits. 4. An optical disk medium in which a recording film is formed on a disk-shaped substrate onto which land tracks, groove tracks, and prepits have been transferred and information is recorded on both the land tracks and the groove tracks. Are divided into sectors,
Moreover, in the optical disk medium including the zones, the address information pits having the address information of the groove sector and the land sector are arranged on the boundary line between the land track and the groove track. The address information pits are shifted in the track direction, and a zone format in which the number of sectors increases from the inner circumference to the outer circumference is used.
An optical disk medium characterized in that prepits of a groove track are not wobbled from the center of each track. 5. The optical disk device for driving an optical disk medium according to claim 1, wherein a zone format in which the number of sectors increases from an inner circumference to an outer circumference of the optical disk medium is used, and a light beam is irradiated onto the optical disk medium. An optical system, a tracking means for controlling the light beam to scan on a track, a means for controlling a tracking polarity so as to track a groove track and a land track of the optical disk medium, and for managing the sector An optical disk device comprising: a control unit for storing information required by the control unit; and a storage unit for storing information required by the control unit, and manages usable zones as zones starting from a groove track and ending at a groove track. 6. An optical disk apparatus for driving an optical disk medium according to claim 2, wherein an optical system for irradiating the optical disk medium with a light beam and tracking means for controlling the light beam to scan a track. Means for controlling a tracking polarity so as to track a groove track and a land track of the optical disk medium; control means for managing the sector; and storage means for storing information required by the control means. An optical disk device comprising: determining whether the disk is usable or unusable based on information of a sector management pre-pit of the optical disk medium, and selecting an available sector. 7. An optical disk drive for driving an optical disk medium according to claim 3, wherein an optical system for irradiating the optical disk medium with a light beam and tracking means for controlling the light beam to scan a track. Means for controlling a tracking polarity so as to track a groove track and a land track of the optical disk medium; control means for managing the sector; and storage means for storing information required by the control means. In order to perform management of a sector having no address information pit sandwiched between zones and adjacent zones, the address of a sector having no address is described from address information pits described in a track being scanned. An optical disc device characterized by calculating, calculating and managing. 8. An optical disk drive for driving an optical disk medium that varies in location depending on the presence or absence of prepits and the amount of wobble, wherein a tracking error signal for recognizing a tracking state of a prepit area in which address information pits and servo information pits are recorded. An optical system for irradiating a light beam onto the optical disk medium; tracking means for controlling the light beam to scan on a track; and means for holding a tracking control signal depending on the state of a prepit, or tracking control. Means for changing parameter means, means for controlling the tracking polarity so as to track the groove track and land track of the optical disk medium, control means for managing the sector, and information required by the control means Storage means for storing An optical disc device comprising: a recording medium;