CN100397513C - Information recording medium - Google Patents

Information recording medium Download PDF

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Publication number
CN100397513C
CN100397513C CNB2005100885400A CN200510088540A CN100397513C CN 100397513 C CN100397513 C CN 100397513C CN B2005100885400 A CNB2005100885400 A CN B2005100885400A CN 200510088540 A CN200510088540 A CN 200510088540A CN 100397513 C CN100397513 C CN 100397513C
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China
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mentioned
playback
reserved area
record
zone
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CNB2005100885400A
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Chinese (zh)
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CN1767022A (en
Inventor
近藤哲也
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Victor Company of Japan Ltd
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Victor Company of Japan Ltd
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Abstract

An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having transparency formed on the recording layer. The information recording medium is further characterized in that a wobbling groove corresponding to the read only area and another wobbling groove corresponding to the recording and reproducing area is formed on the substrate without overlapping with each other, the recording and light transmitting layers are continuously adhered over at least two areas of the read only area and the recording and reproducing area, reflectivity of the recording layer is more than 5%, and a push-pull signal output T 3 reproduced from the read only area and another push-pull signal output T 4 reproduced from the recording and reproducing area before recording satisfies relations of T 3 >=0.1, T 4 >=0.1 and 1.5>=T 3 /T 4 >=0.5.

Description

Information recording carrier
The application be submitted on September 29th, 2002, application number be 02144042.5, denomination of invention divides an application for the application of " information recording carrier ".
Technical field
The invention relates to information recording carrier is done relative motion, read invention information, that use the information recording carrier of optical recording replay device, be about the playback reserved area that has the information that to read concurrently and can write down invention with the information recording carrier in the record reproducing zone of playback information.
Background technology
Now the optical information recorder carrier system that reads information by relative motion uses discoid, card shape, banded information recording carrier.Can be divided into two kinds on playback tailored version and record reproducing type (but Worm type and rewriting type) from the mechanical hook-up aspect that writes down and reset.That is to say the former in advance the record state under dispatch from the factory, the user resets it.And the latter is dispatched from the factory under unwritten state, and the user carries out new record to it, resets.
Along with the multimedization of society, increase in addition, become a problem with the piratic chance of the means of electronics.Thereby in the record reproducing type information recording carrier that the user freely writes down, in order to prevent such infringement, the user need try every possible means to embed the specific code that can not rewrite.
From such viewpoint, the multiple scheme that has the playback reserved area and the information recording carrier in two zones in the record reproducing zone (the record reproducing zone that can rewrite repeatedly) that can write of the permanent data record that can not rewrite concurrently has been proposed.For example generally constitute the playback reserved area with bit string, note specific data in advance, constitute the information recording carrier in record reproducing zone with the non-individual body of groove, the such phase-change information recording carrier of DVD-RAM and DVD-RW obtains practical application, and the user carries out user's record to the record reproducing zone.
Can consider that constituting the playback reserved area with groove replaces constituting the playback reserved area with bit string, utilizes the snakelike method that writes down permanent data of groove shape simultaneously.With the snakelike permanent data that writes down of such groove, the means of distorting that the adulterator of malice can decode finally are the records that depends on the phase change record, just utilize the bit string record of reflectivity equal difference, can be distinguished, and expose the fact of infringement easily.Therefore constitute the way of playback reserved area like this with groove, preferably reach than existing bit string record and more can realize copy protection.
Summary of the invention
In fact had a fling at above-mentioned information recording carrier, found when record and record reproducing that there is unaccommodated situation the playback aspect.Fig. 1 is the planimetric map of the information recording carrier 90 that has a fling at, is made up of playback reserved area 30 and record reproducing zone 40.And playback reserved area 30 and record reproducing zone 40 all are to be made of groove.Wherein in playback reserved area 30, write down the false proof particular code of using, the position data of the comparable data of necessity when these external record reproducing zone 40 usefulness snakelike tanks record record with snakelike tank.Reset this moment and will optimize the shape of groove in the reserved area 30, so that the output of particular code data is maximum, in addition,,, optimize the shape of groove, so that playback error rate minimum at this moment Yi Bian carry out user record Yi Bian in record reproducing zone 40, read position data.The information recording carrier 90 that constitutes like this is contained in the various record reproducing players, and when making its action, the situation of following the tracks of takes place to break away from can not crossing reposefully of 2 zones.After just reading the particular code data of false proof usefulness from playback reserved area 30, move on to record reproducing zone 40, reading of data often takes place to break away to follow the tracks of.
This is because regional function difference separately, and Ji Lu data character is also different in advance, be fit to purposes separately, and the groove shape in 2 zones is difference fully, can not cross 2 zones and reset continuously.
The present invention is the information recording carrier that is used to solve above-mentioned problem, it be constructed as follows.
Technical scheme 1 of the present invention provides a kind of information recording carrier, at least by supporter, be located at the recording layer that is used for information recording and reproduction on the above-mentioned supporter, the photic zone with light transmission that is located on the above-mentioned recording layer is formed, and have playback reserved area and record reproducing zone at least, it is characterized in that: be pre-formed nonoverlapping mutually on the above-mentioned supporter, corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to the snakelike tank in above-mentioned record reproducing zone, above-mentioned recording layer and above-mentioned photic zone, cover above-mentioned playback reserved area and above-mentioned record reproducing zone both sides, the reflectivity of above-mentioned recording layer is more than 5%, the push-pull signal output T3 and the regional push-pull signal output T4 that resets of record reproducing before writing down that reset from above-mentioned playback reserved area satisfy T3 〉=0.1, T4 〉=0.1, and 1.5 〉=T3/T4 〉=0.5, above-mentioned recording layer is the recording layer that is made of dye material.
Technical scheme 2 of the present invention is playback methods of a kind of information recording carrier, it is characterized in that, above-mentioned information recording carrier, at least by supporter, be located at the recording layer that is used for information recording and reproduction on the above-mentioned supporter, the photic zone with light transmission that is located on the above-mentioned recording layer is formed, and have playback reserved area and record reproducing zone at least, be pre-formed nonoverlapping mutually on the above-mentioned supporter, corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to the snakelike tank in above-mentioned record reproducing zone, above-mentioned recording layer and above-mentioned photic zone, cover above-mentioned playback reserved area and above-mentioned record reproducing zone both sides, the reflectivity of above-mentioned recording layer is more than 5%, the push-pull signal output T3 and the regional push-pull signal output T4 that resets of record reproducing before writing down that reset from above-mentioned playback reserved area satisfy T3 〉=0.1, T4 〉=0.1, and 1.5 〉=T3/T4 〉=0.5, above-mentioned playback method, carry out following steps successively: first step, read above-mentioned playback reserved area; With second step, read above-mentioned record reproducing zone.
Description of drawings
Fig. 1 is the planimetric map of the discoid information recording carrier of expression the present invention and prior art.
Fig. 2 is the sectional drawing of expression information recording carrier of the present invention.
Fig. 3 is near the planimetric map expression information recording carrier playback reserved area of the present invention and the record reproducing zone boundary.
Fig. 4 is near the planimetric map expression information recording carrier playback reserved area of the present invention and the record reproducing zone boundary.
Fig. 5 is used for the figure of 4 quadrant photo-detectors of record reproducing for expression information recording carrier of the present invention.
Fig. 6 is the figure of the relation of recommending output T3 and tracking performance of expression information recording carrier playback reserved area of the present invention.
Fig. 7 is the figure of the relation of recommending output T4 and tracking performance in expression information recording carrier record reproducing of the present invention zone.
Fig. 8 recommends the figure of output than the relation of T3/T4 and tracking performance for expression information recording carrier playback reserved area of the present invention and record reproducing zone.
Fig. 9 is the figure of groove depth with the relation of recommending output T3 of expression information recording carrier playback reserved area of the present invention.
Figure 10 is the planimetric map of expression information recording carrier playback reserved area of the present invention.
Figure 11 is the planimetric map in expression information recording carrier record reproducing of the present invention zone.
Figure 12 is the figure of expression inversion frequency modulated digital data.
Figure 13 is the figure of expression translate phase modulated digital data.
Figure 14 is the figure of expression transition amplitude modulated digital data.
Figure 15 is before the expression baseband modulation and the figure of the data variation after the baseband modulation.
Figure 16 is before the expression baseband modulation and the figure of the concrete example of data variation after the baseband modulation.
Figure 17 is the figure of the card shape information recording carrier of expression information recording carrier embodiment of the present invention.
Figure 18 is the figure of the another kind card shape information recording carrier of expression information recording carrier embodiment of the present invention.
Embodiment
The present invention's purpose is to solve above-mentioned problem, the problem that the disengaging that produces when just crossing 2 zoness of different is followed the tracks of, and the present invention will be described with accompanying drawing below.
Fig. 1 represents the outside drawing of information recording carrier 1 of the present invention, the planimetric map when information recording carrier 1 is disc.Just have playback reserved area 30 and record reproducing zone 40 at least, be provided with center pit Q at the center.In the example of this figure, playback reserved area 30 is arranged on inner periphery, and record reproducing zone 40 is arranged on excircle, and opposite setting is also passable.These 2 zones are not overlapped, are in this case to form continuously.Playback reserved area 30 and record reproducing zone 40 respectively have only 1 on drawing, are arranged to respectively have a plurality of also passable.
Fig. 2 is the sectional drawing of information recording carrier 1 of the present invention, has represented the most basic structure of the embodiment of the invention.Just information recording carrier 1 is made up of supporter 13, recording layer 12 and photic zone 11 at least.On supporting body surface (with the interface of recording layer 12), form figure fine, non-overlapping copies corresponding to playback reserved area 30 and record reproducing zone 40.The snakelike tank that wherein constitutes playback reserved area 30 is track Tr31, Tr32 in Fig. 2.The snakelike tank that constitutes record reproducing zone 40 is track Tr41, Tr42, Tr43 etc. in Fig. 2.The groove depth in these 2 zones is d3, is d4 in record reproducing zone 40 at playback reserved area 30.The degree of depth in these 2 zones identical or different all can, get final product so long as can reach the degree of depth of recommending output area described later.Supporter 13, recording layer 12, photic zone 11 threes form in parallel to each other, and recording layer 12 and photic zone 11 are at least on the whole zone in playback reserved area 30 and record reproducing zone 40 covers incessantly continuously.
Wherein, supporter 13 is to have mechanically to keep the recording layer 12 that forms in the above and the substrate of photic zone 11 functions.This material can use any in synthetic resin, pottery, the metal.Preferably make various hot castable resin such as polycarbonate, polymethacrylate, polystyrene, polycarbonate-polystyrene condensate, Polyvinylchloride, alicyclic polyolefin, polymethylpentene and heat-curing resin, various energy-curable resin (comprising uv curing resin, visible-light curing resin, electron ray curing resin etc.) as the synthetic resin typical example.Also can be the synthetic resin of allocating metal powder or ceramic powders etc. into.The typical example of ceramic powders can use soda lime glass, sodium aluminum silicate glass, pyrex, quartz glass etc.The typical example of making metal also can use the sheet metal of aluminium one class that does not have light transmission.Consider that from the angle that mechanical support needs the thickness of supporter 13 preferably adopts 0.3~3mm, is preferably 0.5~2mm.Information recording carrier 1 is under the discoid situation, from considering that with the angle of existing CD exchange the thickness of decision design supporter 13 is so that aggregate thickness such as supporter 13, recording layer 12, photic zone 11 are 1.2mm.As required also can supporter 13 with recording layer 12 opposite sides, print the content and the trade mark of expression information recording carrier 1.
Recording layer 12 has the function of the information of reading or recorded information and even the information of rewriting, by being the thin layer that the recording materials more than 5% are formed at the wavelength X reflectivity.The material of this recording layer 12 can use with the material that causes reflectivity change and refraction index changing before and after the record of phase material as representative or with material that causes the variation of Ke Er rotation angle before and after the record of photomagnetic material as representative or the material that causes refraction index changing and degree of depth change with dye material as the record front and back of representative.
Phase-transition material for example can use the alloy (so-called alloy comprises oxide, nitride, carbonide, sulfide, fluoride etc.) of indium, antimony, tellurium, selenium, germanium, bismuth, vanadium, gallium, platinum, gold, silver, copper, aluminium, silicon, palladium, tin, arsenic etc., and especially preferably using GeSbTe is the alloy of AgInTeSb system, CuAlSbTe system, AgAlSbTe system etc.The atomic percent total amount that also can in these alloys, add trace greater than 0.01% less than 10% Cu, Ba, Co, Cr, Ni, Pt, Si, Sr, Au, Cd, Li, Mo, Mn, Zn, Fe, Pb, Na, Cs, Ga, Pd, Bi, Sn, Ti, V, Ge, Se, S, As, Tl, In, Ni the element more than at least a.The composition of each element, for example there is Ge in GeSbTe system 2Sb 2Te 5, Ge 1Sb 2Te 4, Ge 8Sb 69Te 23, Ge 8Sb 74Te 18, Ge 5Sb 71Te 24, Ge 5Sb 76Te 19, Ge 10Sb 68Te 22, Ge 10Sb 72Te 18, the series of in GeSbTe system, adding Sn, In; There is an Ag in AgInSbTe system 4In 4Sb 56Te 26, Ag 4In 4Sb 54Te 28, Ag 2In 6Sb 54Te 28, Ag 3In 5Sb 54Te 28, Ag 2In 6Sb 56Te 26, add the metal of Cu, Fe, Ge etc. in the AgInSbTe series and the series of partly leading etc.
The photomagnetism material for example can use the alloy (so-called alloy comprises oxide, nitride, carbonide, sulfide, fluoride etc.) of terbium, cobalt, iron, gadolinium, chromium, neodymium, dysprosium, bismuth, palladium, samarium, holmium, praseodymium, manganese, titanium, erbium, ytterbium, lutetium, tin etc., is that the transition metal of representative and the alloy of terres rares constitute with TbFeCo, GdFeCo, DyFeCo etc. especially preferably.Also can with cobalt and platinum alternative stacked film note down the layer 12.
Dye material for example can use porphyrin pigment, quinoline blue pigment, phthalocyanine dye, naphthalene phthalocyanine dye, azo pigment, naphthoquinones pigment, fulgide pigment, polymethine pigment, acridine pigment etc.
Except the material of undertaking these records,, also can include or stacked auxiliary material in the recording layer 12 in order to increase record performance or playback performance.For example, can make and rewrite number of times and the increase of playback light quantity by electric dielectric materials such as stacked ZnS, SiO, ZnSSiO, GeN, SiN, SiC, AlO, AlN, MgF, ZrO, InO on above-mentioned recording materials.In addition in order significantly to increase the playback light quantity, also stacked one deck reflective membrane (heat sinks of aluminium, gold, silver, titanium etc.) simultaneously.Reset in order to carry out high density recording, also can while stacked known super resolution film (so-called masking film).
Use up recording layer 12 is write down and resets, the laser (wavelength X nm) that utilizes object lens (numerical aperture NA) to converge is injected from photic zone 11 1 sides.Just photic zone 11 has the function that the playback light that converges is imported recording layer 12 with the little state of optical distortion.For example be fit to adopting the playback wavelength is material more than 70% for the λ transmittance, preferably at the material more than 80%.Photic zone 11 refractive index n that has regulation with respect to wavelength X in addition is from considering that with the interchangeability of existing CD refractive index n is preferably 1.4~1.7, is preferably .45~1.65.The birefringence that makes two-way is below 100nm, and preferably below 50nm, it is following to be preferably in 35nm, can fully suppress the change of resetting and exporting.Material with such characteristic can use polycarbonate, polymethacrylate, cellulose triacetate, cellulose diacetate, polystyrene, polycarbonate-polystyrene polymkeric substance, Polyvinylchloride, alicyclic polyolefin, polymethylpentene etc.Photic zone 11 also has mechanically, chemically protects the function of recording layer 12.Have such materials with function and can use the high material of rigidity, for example crystalline ceramics (for example soda lime glass, sodium aluminum silicate glass, pyrex, quartz glass) and heat-curing resin, energy-curable resin (for example uv curing resin, visible-light curing resin, electron ray curing resin), moist curable resin, multiple liquid mixing type curable resin.The thickness of photic zone 11 is on the meaning that reduces birefringence (optical anisotropy), preferably below 2mm, below 1.2mm.When on the numerical aperture NA that is contained in object lens 90 is information recording carrier replay device more than 0.7, using, the viewpoint of optical aberration when tilting from suppressing information recording carrier 1, below 0.4mm, be under the 0.85 above situation particularly preferably, preferably make below 0.12mm at NA.From preventing to abrade the viewpoint of recording layer 12, preferably more than 0.02mm.Be that preferred range is 0.02~0.12mm scope under the situation more than 0.85 just at NA.Fluctuation in the face of thickness direction preferably is to the maximum ± 0.003mm.Preferably ± below the 0.002mm.Be preferably in ± below the 0.001mm.Photic zone 11 is not limited to the structure of individual layer shown in Figure 2, and the multilayer with identical function is also passable.In order to alleviate, also can form the known antistatic layer of one decks in opposite sides with recording layer 12 of photic zone 11 attached to the dust on the photic zone 11.
Influence for the object lens that alleviate the adapter that constitutes replay device and pen recorder during with photic zone 11 accidental collisions, also can be at photic zone 11 form hard conatings, lubricating layer (not representing among the figure) with recording layer 12 opposite sides.The material that concrete hard conating uses can be can be through heat-curing resin, energy-curable resin (for example uv curing resin, visible-light curing resin, electron ray curing resin), moist curable resin, the multiple liquid mixing type curable resin of the light of 70% wavelength X.
Above-mentioned hard conating is considered the wearing quality of photic zone 11, and the pencil test value of preferably using JIS standard 5400 is more than certain value.The material that object lens are the hardest is a glass, considers this point, and the pencil test value of hard conating is preferably more than H.Below the trial value, because the hard conating grinding obviously increases dust, error rate sharply increases at this.The thickness of this hard conating is considered impact resistance, preferably more than 0.001mm, considers from the warpage of information recording carrier 1 integral body, preferably below 0.01mm.
Other material of hard conating also can use monomer and its alloy (comprising oxide, nitride, sulfide, fluoride, carbonide etc.) (thickness 1~1000nm) light that can see through 70% wavelength X, the carbon of pencil test value more than H, molybdenum, silicon etc. in addition.
The concrete material of lubricating layer can use and change silicon and fluorine in carbon hydratable polymer compound, has adjusted the fluid lubricant of surface energy level.The thickness of above-mentioned lubricating layer is preferably about 0.1nm~10nm.
Not expression among the figure, can supporter 13 with recording layer 12 opposite sides, prints labels.For example can preferably use the various energy-curable resins (comprising uv curing resin, visible-light curing resin, electron ray curing resin) that contain various pigment and dyestuff, consider that the property known is preferably more than 0.001mm, consider the warpage of information recording carrier 1 integral body, preferably below 0.05mm.Printing process can be adopted silk screen print method, hectographic printing method etc.
Information recording carrier 1 is in order to improve the protection of installing and handling to replay device, also can constitute pack into the structure of cassette disk of whole information recording carrier.
Below to describing as the data of the snakelike tank of permanent data record, the form of record on the information recording carrier 1 of the present invention.On the playback reserved area 30 of information recording carrier 1 of the present invention, taken in, when putting into the player of information recording carrier 1, or the user reads control data when 40 start-of-records of record reproducing zone.Just control data is from being used for making and literary property for information about at least, encrypted secret key, the key that is used to decipher, ciphered data, the code that can write down, the code that mustn't write down, the code that can reset, the code that mustn't reset, make numbering, lot number, admin number, fabricator's information, the kind of information recording carrier, the size of information recording carrier, information recording carrier booking situation density, information recording carrier booking situation linear velocity, the orbit interval of the information recording carrier (P3 that introduces later, among the P4 at least 1), Write strategy information, the particular code data of choosing in playback power information or the known writing information etc.For example the data rewriting with 10 systems or 16 systems record is become the 2 systems data of (comprising BCD code and Gray code).And in playback reserved area 30, make snakelike tank with any modulation system of inversion frequency modulation, translate phase modulation, transition amplitude modulation, carry out the shape record.Snakelike tank be wire, concentric circles, spiral can.Particularly, the snakelike tank that constitutes playback reserved area 30 is under the scroll situation, the recording mode of control data can constant angular speed (constant angular velocity:CAV) be carried out record, also can linear velocity constant (constant linear velocity:CLV) carry out record.Perhaps also different sections be can on radius, form, ZCAV (zone constant angular velocity) and ZCLV (zone constant linearvelocity) adopted in the different controls of each section.Data are carried out record with the shape of snakelike tank, owing to without the bit string record, become the data that forever can not distort.Also can contain position data and clock information in the control data.In order to reduce the mistake of reading of data, also can contain wrong revision code in addition.
In the record reproducing zone 40 of information recording carrier 1 of the present invention, take in the position data that the user often reads when 40 records of record reproducing zone.That is to say that position data is the data of choosing the relative address of distributing from specific address that whole record reproducing zone 40 is distributed, to the subregion, track number, fan section numbering, frame number, field number, temporal information, the mistake revision code etc. at least.For example the data rewriting with 10 systems or 16 systems record is become the 2 systems data of (comprising BCD code and Gray code).And in record reproducing zone 40, make snakelike tank, the record shape with any modulation system of inversion frequency modulation, translate phase modulation, transition amplitude modulation.Playback reserved area 30 has also write down under the situation of position data, and the position data of record can be continuous in record reproducing zone 40, also can be discontinuous.In the record reproducing zone 40 in the record position data, to the content of the control data of record in playback reserved area 30 again an additional record part also can.Snakelike tank be wire, concentric circles, spiral can.The snakelike tank that particularly constitutes playback reserved area 30 is under the scroll situation, the recording mode of control data can constant angular speed (constant angularvelocity:CAV) be carried out record, also can linear velocity constant (constant linearvelocity:CLV) carry out record.Perhaps also different sections be can on radius, form, ZCAV (zone constant angular velocity) and ZCLV (zone constant linear velocity) adopted in the different controls of each section.Be modulated at the back and be described in detail about inversion frequency modulation, translate phase modulation, transition amplitude.
At this, the planar structure of information recording carrier 1 is remarked additionally.The planar structure of information recording carrier 1 is made up of playback reserved area 30 and record reproducing zone 40 as shown in Figure 1 at least.Planar structure shown in Figure 3 is adopted in these zones.Fig. 3 is the playback reserved area 30 of expression information recording carrier 1 and the enlarged diagram of record reproducing zone 40 boundaries.Here only depict Tr31, Tr32 in the track that constitutes playback reserved area 30 typically, and Tr41, Tr42, Tr43 in the track in formation record reproducing zone 40.The a plurality of tracks that constitute playback reserved area 30 are grooves, and control data writes down (but having omitted snakelike diagram) with snakelike tank.In the heart orbit interval is P3 (track Tr31 shown in Fig. 3 and Tr32 is at interval) in each track.The a plurality of tracks that constitute record reproducing zone 40 are grooves, and position data writes down (but having omitted snakelike diagram) with snakelike tank.In the heart orbit interval is P4 (track Tr41 shown in Fig. 3 and Tr42 is at interval) in each track.The value of these P3 and P4 is P3≤λ/NA, P4≤λ/NA.The value of P3 and P4 can be identical, also can be different.For example when using bluish violet color laser and high NA adapter, λ=405nm, NA=0.85, P3≤476nm, P4≤476nm.
The interval in playback reserved area 30 and record reproducing zone 40, just the interval of Tr32 and Tr41 among Fig. 3 is below the 25 μ m as the successional MIN necessary condition that obtains following the tracks of.In addition, among the interval (interval of Tr32 and Tr41) in preferred playback reserved area 30 and record reproducing zone 40 and P3 or the P4 wantonly 1 identical.Have again, under the big situation of P3 and P4 difference, be preferably any value in the middle of P3 and the P4.The mean value of P3 and P4 preferably.
Preferably the reset interval in reserved area 30 and record reproducing zone 40 is all identical with P3, P4.
Impact when traversed zone reaches on the minimal meaning, also the transitional region that is made of 1 above track can be set between playback reserved area 30 and record reproducing zone 40.Orbit interval is continuous from P3 to P4 in this transitional region, and it is variable perhaps also can to make multistage.It is the non-snakelike tank of record data not basically that the groove that constitutes this transitional region is arranged again, also can be the snakelike tank of the record remainder according to (data 0) or empty data.
The amplitude of each zone (playback reserved area 30 and record reproducing zone 40) snakelike tank has in the relation that constitutes (amplitude of the snakelike tank of the reserved area 30 of just resetting is below P3, and the snakelike tank amplitude in record reproducing zone 40 is below P4) below the regional separately spacing.
In addition, just also introduce at this with respect to the planar configuration of information recording carrier 2 information recording carrier 1, when the user writes down.Fig. 4 is the playback reserved area 30 of information recording carrier 2 and the enlarged diagram of record reproducing zone 40 boundaries, and with respect to the information recording carrier 1 of Fig. 3, the expression user carries out the state of record data.Just the user only write down in record reproducing zone 40 in information recording carrier 1, expression is representative phase change record here, particularly with being called height-to-state that low (high-to-low) mode writes down.In record reproducing zone 40, for example only carry out the user data record, write a plurality of record mark M at Tr41 and Tr42.So-called height-be meant that it is crystalline state that recording layer 12 write down to-low mode, the reflectivity height becomes amorphous state during record, the mode of reflectivity reduction.Like this in playback reserved area 30 and record reproducing zone 40, form mark M intermittently by part or all of record reproducing zone 40, finish the user data record by information recording carrier 2.Wherein the aspect used of user record for example can be used so-called (d, k) modulation signal of code.Wherein (d, k) modulation signal can use the fixed length code, also can use elongated code.(the d of fixed length code for example, k) example has EFM, EFM plus sige (8-16 modulation) and the spy of d=2, k=10 to open the modulation signal (D8-15 modulation) of 2000-286709 number record, the spy of d=1, k=9 is willing to the D1 of the modulation signal of 2001-80205 number record (D4,6 modulation), d=1, k=7,7 modulation (spy opens 2000-332613 number record).Elongated code (d, k) Tiao Zhi example for example preferably uses the spy of d=1, k=7 to open the modulation signal (17PP modulation) etc. of flat 11-346154 number record.
The output of recommending to information recording carrier 1 main points of the present invention describes below.Information recording carrier 1 of the present invention is made up of playback reserved area 30 and record reproducing zone 40 at least, allow they bases purposes separately, just optimize the shape of groove at playback reserved area 30, make control data output become big, read position data in record reproducing zone 40, and carry out user record, and select the shape of optimal groove, the error rate that reset this moment diminishes.To satisfy the relation of T3 〉=0.1, T4 〉=0.1 and 1.5 〉=T3/T4 〉=0.5 but the push-pull signal of being reset by the playback reserved area is exported T3 at this moment, export T4 by the push-pull signal of the playback of writing down preceding record reproducing zone.Wherein so-called recommending exported the differential signal that is meant when regional transverse slot separately.Fig. 5 is the synoptic diagram at 4 used quadrant photo-detectors 10 of the adapter of the device for reproducing recorded of discoid information recording carrier, with this figure the method for recommending output of measuring is described.The longitudinal axis of Fig. 5 is that the radial direction transverse direction of groove (radially), transverse axis are tangential direction (trajectory direction), and this vertical-horizontal relation is the situation of discoid information recording carrier corresponding to Fig. 3.Wherein the playback of 4 quadrant photo-detectors 10 output is respectively Ia, Ib, Ic, Id.Utilize this moment AC to connect, measure the difference of inner circumferential side and outer circumferential sides, just measure | (Ia+Ib)-(Ic+Id) |, utilize then by DC to connect, measure summation, just measure | (Ia+Ib+Ic+Id) |.Recommend the ratio of output T for them, T is defined as T=| (Ia+Ib)-(Ic+Id) |/| (Ia+Ib+Ic+Id) |.According to this definition, measure the recommending of output T3 and record reproducing zone 40 of recommending of playback reserved area 30 and export T4.
The inventor is in order to cross the playback in playback reserved area 30 and record reproducing zone 40, each regional depth d 3 and d4 are regulated, make discoid information recording carrier 1, to obtain the various outputs of recommending, in fact studied and crossed performance, obtained the corresponding scope of output of recommending.This test findings is shown in Fig. 6, Fig. 7, Fig. 8.What Fig. 6 for a change reset reserved area 30 recommending output during T3, and the result of the stability of the tracking in the investigation playback reserved area 30 is clean, is in the test findings that fully limits under the eccentric state of disk.As shown in Figure 6, T3 is 0.08 when following, can not follow the tracks of fully.
Fig. 7 is recommending when exporting T4 of record reproducing zone 40 for a change, and the result of the stability of the tracking in the investigation records playback area 40 is clean, is in the test findings that fully limits under the eccentric state of disk.As shown in Figure 7, T4 is 0.08 when following, can not follow the tracks of fully, with coming to the same thing of playback reserved area 30.
Following Fig. 8 changes recommending of playback reserved area 30 to export recommending when exporting T4 of T3 and record reproducing zone 40 simultaneously, and the result of the stability of two regional playback times tracking is crossed in investigation, is the test findings under abundant qualification disk off-centre state.As shown in Figure 8, in the time of only in 1.5 〉=T3/T4 〉=0.5 scope, just can cross two zones and reset.The ratio of output is recommended in 2 zones must be at one below the definite value, and its reason is, it is big to recommend the output difference, and not servo-actuated of servo control mechanism breaks away from and follows the tracks of.Just the dynamic range of the servo circuit of player is conditional.
In a word, can cross the condition of resetting in 2 zones is to satisfy simultaneously:
T3≥0.1
T4≥0.1
1.5≥T3/T4≥0.5
These tests are to obtain under the perfect condition of the off-centre that fully limits discoid information recording carrier 1.The precision of the disk center pit that reality is produced in batches is uneven, and the eccentric cardinal principle of considering the information recording carrier of making of prior art 1 is in 40~70 μ m, and for traversed zone playback more stably, preferred range must satisfy simultaneously:
T3≥0.15
T4≥0.15
1.45≥T3/T4≥0.6
These tests are carried out under clean.Actual disk and the player of producing in batches is to use under general atmosphere, considers the situation of information recording carrier 1 absorption dust, and for traversed zone playback more stably, preferred range must satisfy simultaneously:
T3≥0.20
T4≥0.20
1.4≥T3/T4≥0.7
Wherein T3 and T4 are determined by orbit interval P3 and P4, the groove width of playback reserved area 30 and groove width, groove depth d3 and the d4 in record reproducing zone 40.For example Fig. 9 for playback reserved area 30 is at λ that 405nm, NA are 0.85, n is 1.6, P3 is that 0.32 μ m, groove width are under the 0.16 μ m situation, the span of T3 is studied.Wherein only change groove depth d3, get nd3/ λ on the transverse axis, get T3 on the longitudinal axis.Wherein nd3/ λ is 0.125 to be that maximum value is arranged, and the value of getting T3 is 0~0.45.Its tendency is also identical with the situation of T4.Therefore, we can say that the most corresponding scope is under such parameter:
0.45≥T3≥0.20
0.45≥T4≥0.20
1.4≥T3/T4≥0.7
By the relation of Fig. 9, change the groove depth d3 and the d4 in playback reserved area 30 and record reproducing zone 40 respectively, can reach most preferred scope.
Utilize the track spacing P3 and the P4 that change playback reserved area 30 and record reproducing zone 40, also can reach most preferred scope.For example orbit interval P3 gets big value, can increase the value of T3, also can on the contrary.Particularly also can effectively utilize the data characteristics of record in playback reserved area 30 and record reproducing zone 40 this moment, be that it can reach optimum state.Figure 10 is the figure of the snakelike tank situation of Tr31 in the expression playback reserved area 30 and Tr32.Control data is to use the snakelike tank record in playback reserved area 30.As previously mentioned, control data 300 is will be when information recording carrier 1 is installed or the data that read when beginning of user record, and its recording capacity itself is smaller, as reading fast, through 100~1000 times, writes same data repeatedly.Therefore control data 300 will write through the length more than 1 week at least.In playback reserved area 30, the data of Tr31 data and Tr32 meeting mutual interference mutually (intertrack crosstalk) is so preferably set orbit interval P3 more like this.In other words, satisfy above-mentioned scope, also can set bigger orbit interval P3 and P4, for example establish d4=d3=22nm, setting P4 is that 320nm, P3 are 350nm, can guarantee the stability of playback continuously, can access the few control data of intertrack crosstalk 300.In addition, for the output that makes playback time more greatly, can set d3 greatlyyer than d4.That is, establishing P4 and be 320mm, to establish P3 be 350mm, and d4 is 22 μ m, and d3 is 28 μ m.Can guarantee the stability of playback continuously, obtain the few control data of intertrack crosstalk 300.
Figure 11 is the figure of the situation of the snakelike tank of Tr41 in the expression record reproducing zone 40 and Tr42.In record reproducing zone 40 every predetermined distance with snakelike tank record position data.As previously mentioned, position data 400 is user records when beginning or the data that read in the record, and this recording capacity itself is very little.During record owing to must generate correct reference clock, so clock data 450 is arranged on the gap of position data 400.Clock data 450 for example is the sine wave of single-frequency, and its length is more than 10 times of position data 400.Therefore as shown in figure 11, the overlapping probability of position data 400 and adjacent track is very low, so data hardly can phase mutual interference (not crosstalking between following the Way).What just orbit interval P4 can set is smaller, and its result also can obtain to realize highdensity information recording carrier 1.Because big in the output of this position data 400 and clock data 450 playback times, d4 also can set greatlyyer about groove depth d4.But from the user record this point, groove depth is shallow can to improve degree of modulation, and error rate is reduced, so want the corresponding groove depth that reduces.
The problem of having considered when design information record carrier 1 has been described above, and take all factors into consideration the intertrack crosstalk of the intertrack crosstalk of control data, reset output, position data 400 and clock data 450, reset output, user data error rate etc., can determine the groove width of orbit interval P3 and P4, groove depth d3 and d4, playback reserved area 30 and the groove width in record reproducing zone 40.This moment, T3 and T4 in the scope of the invention, can steadily carry out crossing of 2 zones.
Information recording carrier 1 track (for example Tr31 and Tr41 etc.) of this structure is arranged on certain position of plane L (land) between so-called groove G (groove) and line.The title of plane L between groove G and line wherein, groove G is the groove of expression near the plane of incidence, plane L is the groove (as Japanese Industrial Standards JIS-X6271-1991) of expression away from the plane of incidence between line.To track be suitable for being placed on groove G still be between line plane L study.This problem is not only control data and position data, and also with to be the user reset at recording layer 12 enterprising line items, the problem that is suitable for being recorded in groove G and still is plane L between line is closely related.Find in the time of with this viewpoint research, select to be recorded in groove G such as user, can suppress to reset and beat and error rate, and the performance of record might as well repeatedly to the record of recording layer 12.Its reason is because groove G is positioned at the position of more forward (approaching) than plane L between line from laser, thus with line between plane L compare, easier savings is excited light-struck heat among the groove G.Its result is the record susceptibility height in the groove not only, and the shape of the record mark that forms on groove is even, therefore the record that can realize ideal with groove G.On the contrary under the situation of plane L record same tag between line, G compares with groove, the easy heat release of the thermal capacitance of laser radiation, so the record mark shape that the plane forms between line is inhomogeneous, and the record that can not realize ideal with plane L between line.Therefore as shown in Figure 2, track Tr41, the Tr42 in record reproducing zone 40, Tr43 etc. preferably are arranged near photic zone 11 1 sides.In addition from considering that with the playback continuity in record reproducing zone 40 track Tr31, the Tr32 of playback reserved area 30 also preferably is arranged near photic zone 11 1 sides (groove G).
Describe being recorded in recording methods such as control data on the information recording carrier 1 of the present invention and position data below.As previously mentioned, in playback reserved area 30 and record reproducing zone 40, control data 300, position data 400 etc. are used any modulation system of inversion frequency modulation, translate phase modulation, transition amplitude modulation, carry out the shape record with snakelike tank.Though the modulation system of control data 300 and position data 400 can be different mutually, and is preferably identical.Data be 2 systems (scale-of-two) or multi-system can, at this with the modulation of scale-of-two explanation inversion frequency, translate phase modulation, transition amplitude modulation.
The physical record of inversion frequency modulation as shown in figure 12, carries out the shape record with HFS and low frequency part.Figure 12 is data 1,0, and 1,1,0 example as a shape record is made up of HFS 501 and low frequency part 500.HFS 501 and low frequency part 500 be 1 and 0 corresponding with data bit respectively, carries out frequency in per 1 channels bits and switch laggard line number word record.Wherein constitute each frequency wave number partly without limits, constitute by the ripple more than 1.Detect frequency for correct in replay device, and be data rate to a certain degree, consider preferably with 1~100 ripple,, to constitute the frequency part of corresponding above-mentioned each data bit when too not tediously long preferably in the scope of 1~30 ripple.Can make HFS 501 identical with low frequency part 500 amplitude separately.Without limits to amplitude ratio, when considering the frequency characteristic of replay device, can make HFS 501 amplitude ratio low frequency part 500 amplitude more greatly.To the size of the physical length of the channels bits that constitutes by HFS 501 and low frequency part 500 and its amplitude without limits.
The amplitude of HFS 501 and low frequency part 500 is consistent respectively as shown in figure 12, and the length of HFS 501 can be identical with the length of low frequency part 500.Like this,, playback time judges because can carrying out 0,1 with enough amplitude threshold values, and, can in 1 time threshold, read the data of serialization, simplification so playback circuitry becomes.Under replay data is beated the situation of (waving at time-axis direction) sometimes in addition, also has the advantage that influences minimum that can make it.Make the code that is write down be desirable symmetry, make the length overall of HFS 501 and the length overall of low frequency part 302 equate there is not flip-flop in the replay signal.It does not undertake the decoding of data and servo, is favourable.
Phase place on the channels bits switching point of HFS 501 and low frequency part 500 can be set arbitrarily, and should prevent from the saltus step of phase place as shown in figure 12, HFS 501 and low frequency part can be set also, to guarantee the continuity on the channel code change point.That is to say the phase place that will select low frequency part 500 beginning, what make the end of HFS 501 and low frequency part 500 begins to be identical phase directional.In addition on the contrary too, select the phase place of HFS 501 beginning, what make the end of low frequency part 500 and HFS begins to be identical phase directional.Such selection, the continuity of maintenance phase place improves electric power, because the playback envelope is certain, has improved the data error rate of information recording carrier 1 simultaneously.
It is arbitrarily that the frequency of HFS 501 and low frequency part 500 is selected, but for fear of on information recording carrier 1 with the interference of the frequency band of user record data, requiring HFS 501 can not be than low frequency part 500 obvious high frequencies.On the one hand in order to make address date playback error rate good, preferably to have to a certain degree HFS 501 and the difference on the frequency of low frequency part 500, keep good separation property.From then on viewpoint is seen, the frequency ratio (high-frequency/low-frequency) of preferred HFS 501 and low frequency part 500 is preferably in 1.09~5.0 scopes.In other words, the phase differential of 2 frequencies preferably in ± π/12~± π/0.75 (360 ± 15 degree~± 240 degree) scope.As preferred range is 360 ± 15 degree~± 210 degree, preferably 360 ± 16.5 degree~± 180 degree.
Shown in the accompanying drawing of Figure 12, wherein special if making frequency ratio (high-frequency/low-frequency) is 1.5 times, 2 frequencies the phase place of single ripple is become stagger to-pi/2 .5 and+relation of pi/2 .5.In other words become the relation that staggers to 360 ± 72 degree.These 2 frequencies are represented with the integral multiple (is 3 times and 2 times at this) of single-frequency (is 0.5 at this).Therefore has the advantage that demodulator circuit is simplified.The circuit that utilization has 0.5 form also makes the clock generation become easy.Also can utilize synchro detection circuit to carry out demodulation, can significantly reduce error rate this moment.
Physical record to the translate phase modulation describes below.Figure 13 is data 1,0, and an example of shape record is carried out in the modulation of 1,1,0 usefulness translate phase, is made up of leading phase part 511 and lagging phase part 510.Leading phase part 511 and lagging phase part 510 be 0 and 1 corresponding with data bit respectively, and per 1 channels bits medium frequency switches laggard line number word record.The sinusoidal wave sin0 of leading phase part 511 usefulness represents specifically, the sin (π) expression that lagging phase part 510 usefulness are sinusoidal wave.。Leading phase part 511 and lagging phase part 510 are made of 1 ripple respectively, and phase differential is π, so can fully separate playback with the envelope detection with synchronous detection.
Wherein the frequency of leading phase part 511 and lagging phase part 510 is all identical, to formation wave number separately without limits, is made of the ripple more than 1.For correct detected phase in replay device, and be data rate to a certain degree, consider too not tediously long, preferably with 1~100 ripple, be preferably in the scope of 1~30 ripple, constitute and corresponding each bit position mutually of above-mentioned each data bit.
Leading phase part 511 can be identical with lagging phase part 510 physical length separately, also can be different.Physical length separately is identical, because playback time can separate continuous data one by one with the regular hour (clock), institute is so that the playback circuitry simplification.This external replay data is beated under the situation of (waving at time-axis direction) sometimes, also has the advantage that influences minimum that can make it.The translate phase modulation can be reset with low error rate with known synchro detection circuit.
Leading phase part 511 can be identical with lagging phase part 510 amplitude separately, also can be different, consider the complexity of playback, and preferably identical.
Having is the phase differential of leading phase part 511 and lagging phase part 510 again, and the stall limit that is suitable for information recording carrier 1 has been obtained in test, and clear and definite phase differential to π/8 can be separated.In other words, minimum phase difference can be set in the scope (π is equivalent to the minimum phase difference of 2 systems) of π/8~π.That is to say that the data from 2 systems to 16 systems can be used under the situation of multi-system record.
Can be for this control data 300 or position data 400 the overlapping record of the single-frequency of reference clock.Just modulate for translate phase, can be overlapping the single-frequency of integral multiple 1 frequency (containing 1) or the integer branch.This under the overlapping situation of clock frequency, can be with known bandpass filter frequency separation, the difference of the frequency of preferred translate phase modulation and the frequency of clock is big.The frequency of for example establishing the translate phase modulation is 1, and the frequency of clock is 1/2, and these frequencies are suitable for separating, and data, clock can be stablized extraction.
Not expression makes sawtooth wave to basic wave among the figure, utilizes the rising edge of pulse and the negative edge of pulse to control respectively, also can show the difference of phase place.For example data " 1 " are for rising edge is gentle, negative edge is precipitous, and data " 0 " are that rising edge is precipitous, negative edge gentle, also can carry out the shape record.Utilizing rises has with the input Hi-pass filter with the different method for recording data of angle that descends, and separates differential component and carries out demodulation, and circuit structure is simple, and the advantage that also can reset under low C/N environment.
Physical record to the transition amplitude modulation describes below.Figure 14 is data 1,0, and an example of shape record is carried out in the modulation of 1,1,0 usefulness transition amplitude, forms by making groove be snakelike amplitude part 521 with some cycles and not be snakelike non-amplitude part 520.Amplitude part 521 and non-amplitude part 520 be 1 and 0 corresponding with data bit respectively.Amplitude part 521 is by 3 wave components in Figure 14, to it quantity without limits.Ripple is too much, and the length of non-amplitude part 520 also must be grown, and is difficult to detect so playback time generates the basic wave of door.Therefore wave number is 2~100 ripples, and it is more suitable to be preferably 3~30 Bobs.To amplitude part 521 and non-amplitude part 520 separately length and the size of amplitude part 521 amplitudes without limits.As shown in figure 14, the amplitude size of amplitude part 521 is consistent, and the length of amplitude part 521 words identical with the length of non-amplitude part 520, because playback time can carry out 0 with enough amplitude threshold values, 1 judges, and continuous data can read with a time threshold values, so that playback circuitry becomes is simple.Have under the situation of beat (waving) in replay data, also have the advantage that influences minimum that can make it at time-axis direction.If make record code be desirable symmetry, then the length overall of the length overall of amplitude part 521 and non-amplitude part 520 equates, does not just have flip-flop in the replay signal.It does not bear the decoding of data and servo, is favourable.
More than information recording carrier 1--of the present invention is illustrated.The present invention is the information recording carrier 1 that has playback reserved area 30 and record reproducing zone 40 at least, resets for crossing 2 zones, makes the scope of push-pull signal output in certain regulation.Above explanation is the explanation that is used to represent the simplification of substance, the invention is not restricted to the information recording carrier 1 of Fig. 1~Figure 14 explanation.Content of the present invention be can follow and many variations and application carried out.Embodiment shown in the figure also can the mutual alternative textural element, also can replace other textural element of record herein.
For example make the basic wave of snakelike tank be mainly sine wave, the example that contains the part sawtooth wave is illustrated, be not limited to this, triangular wave, square wave, trapezoidal wave also can as basic wave.But, with record reproducing zone 40 o'clock, preferably be chosen in the overlapping frequency in recording frequency band territory that recording layer 12 does not use with the user because they contain high frequency component.The basic wave of snakelike tank is shaped as prerequisite with sin in addition, the invention is not restricted to this.The basic wave that for example makes snakelike tank is that the cos shape also has identical effect certainly.
For example the recording method of explanation explanation before this is the intactly direct-recording method of data, the invention is not restricted to this direct record.That is to say with directly being recorded under the long serial data situation of record, can be continuous 0 or 1, might produce flip-flop in the data.For fear of this point, also can adopt the method for in advance data being carried out the laggard line item of baseband modulation.That is to say to be transformed into other code to 0 and 1 in advance, make 0 and 1 continuously below certain value.Such method can be used alone or in combination manchester code, PE modulation, MFM modulation, M2 modulation, NRZI modulation, NRZ modulation, RZ modulation, differential modulated etc.
The example that baseband modulation is particularly suitable for information recording carrier 1 of the present invention has manchester code (bi-phase modulated).As shown in figure 15, this is corresponding to 1 method of being used as 2 usefulness wanting record data.That is to say corresponding to the data 0 that will write down to be assigned as 00 or 11, be assigned as 01 or 10 corresponding to data 1.And, must add front code counter-rotating code at the data consecutive hours.
As shown in figure 16,100001 data become 010011001101 code string.Raw data contains continuous 40, and 0 probability that occurs is 12 times asymmetric data.To this, being transformed into 0 or 1 after ovennodulation has 2 at most continuously, and is the symmetric data that 0 and 1 probability that occurs equates.This following baseband modulation of certain value that is limited in continuously same position has and improves the effect that reads stability, so become the pre-treatment when using long position data.The modulation system good with the manchester code correspondence has the inversion frequency modulation system.Particularly 2 frequency plot differences in HFS 501 and low frequency part 500 be ± the inversion frequency modulation of π/1.5 (360 ± 15 degree~± 120 degree) in, because frequency ratio (high-frequency/low-frequency) separately is 2.0, good with the compatibility of the manchester code that obtains 1 bit data from 2, the mistake in the time of can reducing data extract.
Carry out the method for dispersed record after also handlebar position data height decomposes.For example have with null data set and close, carry out record, dispose the recording method of this serial data at regular intervals with the data combination of " 10X " (X is 0 or 1)." 10 " as data trigger, are only extracted X, and data just can be reduced.Even the method is effective under the form situation of the serial data that reads processing of can taking time.
As inversion frequency modulation and translate phase modulation, under the switching point situation of switching point corresponding to data of frequency or phase place, also significant change on the preference data.From this viewpoint, in advance data are carried out the method for differential modulated in addition.Specifically, for example, can generate the differentiated waveform of NRZI signal by the NRZI modulation signal is transformed into the RZ signal.This process at first makes delay waveform to the original waveform of NRZI modulation, then their difference is made the bipolarity waveform.Make the one-sided polarity of bipolarity waveform to the opposing party's upset (turning back), generate the RZ modulation waveform.
Though in the above in the explanation with disc information recording carrier 1,2 as example, as shown in figure 17, also have and have the card shape information recording carrier 3 that forms banded playback reserved area 30, forms ribbon record reproducing zone 40.As shown in figure 18, the playback reserved area 30 with formation ring-type, the card shape information recording carrier 4 that forms ring-type record reproducing zone 40 are also arranged.
Not expression among the figure also can constitute the stacked information recording carrier of multilayer layer to information recording carrier 1 expansion of the present invention.For example make information recording carrier 1 by supporter the 13, the 1st recording layer, the 1st photic zone, the 2nd recording layer, the 2nd euphotic sequential cascade, can make 2 layers information recording carrier 1.Do like this, can distinguish user data on the 1st recording layer and the 2nd recording layer, recording capacity can be multiplied.Also can make one group of lamination repeated multiple times, expand to multilayer information recording carriers such as (for example three layers, four layers) recording layer 12 and photic zone 11.Under discoid information recording carrier 1,2 situations, its size for example can adopt the various sizes of diameter 20~400mm without limits, can be 32,41,51,60,65,80,88,120,130,200,300,356mm etc.
Reset or optical maser wavelength that record uses is decided to be 405nm, to this also without limits, for example also can be 1300,980,830,780,650,635,515,460,442,430,413,370nm etc. and near the wavelength their.NA is except 0.85 for the lens numerical aperture, also can be 0.4,0.45,0.55,0.60,0.65,0.7,0.75,0.8,0.9 etc.Also can be to be the numerical aperture more than 1 of representative in addition with the solid immersion lens.
In the playback reserved area 30 of information recording carrier 1 of the present invention,, just make the optimal playback power of record reproducing zone 40 playback times as 1 control data record reproducing power information in advance.This is particularly useful during for the phase change type information recording carrier 1 made with phase change material to recording layer 12.Phase change material with have that to write down the advantage of high density marker M easily with high power laser light opposite, playback time has the shortcoming of the mark M evanescence that has write with lower laser power Continuous irradiation.That is to say, think that so-called playback light occurring worsens.Therefore select low but do not make in fact the disappear laser power of degree of mark M, as replay device is corresponding, but the words that laser power is low, the shortcoming that has the laser size to increase relatively, particularly under the situation of gallium nitride based semiconductor element as the so-called bluish violet color laser of light source, this can obviously occur.Therefore in the record of the phase change of usefulness bluish violet color laser, the range of choice of its playback power is very narrow, is strict with single playback power the information recording carrier 1 of the single manufacturing of each fabricator well to be reset.Therefore in the regulation zone of information recording carrier 1, if at the optimal playback power of playback reserved area 30 records, when beginning, goes to replay device to read this zone, collect optimal playback performance number, by it being fed back to the power driving device of playback laser, carry out optimal playback.The playback performance number of collecting also can placeholder record in the storer of replay device.Whenever information recording carrier 1 or the playback time of packing into, remove the information of last time, be updated to new information, can carry out optimal playback often.About collecting the means of the most suitable playback performance number, that is to say, read the means of the control data that contains the playback performance number from playback reserved area 30, because these data are to use the snakelike tank record, without mark M record,, can read in quite wide power bracket so playback light can not worsen.Therefore if make with fixing laser power and read playback reserved area 30, by replay device that can appropriate change laser power reading and recording playback area 40, the playback that information recording carrier 1 of the present invention is fit to.Take specifically to read playback reserved area 30, on the basis of collecting optimum playback power data, change the setting of playback power then, make the method for record reproducing zone 40 playbacks with determined playback power with fixing, high slightly laser power.Cross 2 and change playback power when regional, but because push-pull signal is the differential signal of radial direction,, almost do not impact when crossing so that light quantity changes is smaller.As mentioned above, replay device and playback method can be brought into play the performance of information recording carrier 1 to 4 to greatest extent, and information recording carrier 1 of the present invention is reset, and can construct only recording and reproducing system simultaneously.
As mentioned above, information recording carrier 1 of the present invention includes playback reserved area 30 and record reproducing zone 40 at least, exports in certain specialized range by making push-pull signal separately, can cross 2 zones reposefully and reset.

Claims (2)

1. information recording carrier, at least by supporter, be located at the recording layer that is used for information recording and reproduction on the above-mentioned supporter, the photic zone with light transmission that is located on the above-mentioned recording layer is formed, and have playback reserved area and record reproducing zone at least, it is characterized in that:
Be pre-formed on the above-mentioned supporter nonoverlapping mutually, corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to the snakelike tank in above-mentioned record reproducing zone,
In corresponding to the snakelike tank of above-mentioned playback reserved area and snakelike tank corresponding to above-mentioned record reproducing zone, with any modulation system record data of inversion frequency modulation, translate phase modulation, transition amplitude modulation,
Corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to being spaced apart below the 25 μ m of the snakelike tank in above-mentioned record reproducing zone,
Above-mentioned recording layer and above-mentioned photic zone cover above-mentioned playback reserved area and above-mentioned record reproducing zone both sides' whole zone continuously,
The reflectivity of above-mentioned recording layer is more than 5%,
The adapter that utilization has 4 quadrant photo-detectors carries out playback time to above-mentioned playback reserved area or the preceding above-mentioned record reproducing zone of record, the playback output of the above-mentioned 4 quadrant photo-detectors that the inner circumferential side of above-mentioned information recording carrier is reset is made as Ia, Ib, the playback output of the above-mentioned 4 quadrant photo-detectors that the outer circumferential sides of above-mentioned information recording carrier is reset is made as Ic, under the situation of Id, so that to above-mentioned playback reserved area carry out playback time by | (Ia+Ib)-(Ic+Id) |/| (Ia+Ib+Ic+Id) | the push-pull signal of this formula definition output T3, with the record reproducing zone before the above-mentioned record is carried out playback time and satisfies T3 〉=0.1 by the push-pull signal of above-mentioned formula definition output T4, T4 〉=0.1, and the mode of 1.5 〉=T3/T4 〉=0.5, formation is corresponding to the snakelike tank of above-mentioned playback reserved area and corresponding to the snakelike tank in above-mentioned record reproducing zone
Above-mentioned recording layer is the recording layer that is made of dye material.
2. the playback method of an information recording carrier is characterized in that,
Above-mentioned information recording carrier,
At least by supporter, be located at the recording layer that is used for information recording and reproduction on the above-mentioned supporter, the photic zone with light transmission that is located on the above-mentioned recording layer is formed, and has playback reserved area and record reproducing zone at least,
Be pre-formed on the above-mentioned supporter nonoverlapping mutually, corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to the snakelike tank in above-mentioned record reproducing zone,
In corresponding to the snakelike tank of above-mentioned playback reserved area and snakelike tank corresponding to above-mentioned record reproducing zone, with any modulation system record data of inversion frequency modulation, translate phase modulation, transition amplitude modulation,
Corresponding to the snakelike tank of above-mentioned playback reserved area with corresponding to being spaced apart below the 25 μ m of the snakelike tank in above-mentioned record reproducing zone,
Above-mentioned recording layer and above-mentioned photic zone cover above-mentioned playback reserved area and above-mentioned record reproducing zone both sides' whole zone continuously,
The reflectivity of above-mentioned recording layer is more than 5%,
The adapter that utilization has 4 quadrant photo-detectors carries out playback time to above-mentioned playback reserved area or the preceding above-mentioned record reproducing zone of record, the playback output of the above-mentioned 4 quadrant photo-detectors that the inner circumferential side of above-mentioned information recording carrier is reset is made as Ia, Ib, the playback output of the above-mentioned 4 quadrant photo-detectors that the outer circumferential sides of above-mentioned information recording carrier is reset is made as Ic, under the situation of Id, so that to above-mentioned playback reserved area carry out playback time by | (Ia+Ib)-(Ic+Id) |/| (Ia+Ib+Ic+Id) | the push-pull signal of this formula definition output T3, with the record reproducing zone before the above-mentioned record is carried out playback time and satisfies T3 〉=0.1 by the push-pull signal of above-mentioned formula definition output T4, T4 〉=0.1, and the mode of 1.5 〉=T3/T4 〉=0.5, formation is corresponding to the snakelike tank of above-mentioned playback reserved area and corresponding to the snakelike tank in above-mentioned record reproducing zone
Above-mentioned playback method, carry out following steps successively:
First step reads above-mentioned playback reserved area; With
Second step reads above-mentioned record reproducing zone.
CNB2005100885400A 2001-10-15 2002-09-29 Information recording medium Expired - Fee Related CN100397513C (en)

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