CN100418141C - Method for identifying double-layer disc and optical disc apparatus - Google Patents
Method for identifying double-layer disc and optical disc apparatus Download PDFInfo
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- CN100418141C CN100418141C CNB2004800208979A CN200480020897A CN100418141C CN 100418141 C CN100418141 C CN 100418141C CN B2004800208979 A CNB2004800208979 A CN B2004800208979A CN 200480020897 A CN200480020897 A CN 200480020897A CN 100418141 C CN100418141 C CN 100418141C
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Abstract
The object of the present invention is to enable the identification of double-layer disc type (recordable double-layer disc, rewritable double-layer disc and ROM-type double-layer disc) to be easily and accurately performed. The method for identifying double-layer disc contains obtaining a reflectance of each light by irradiating light of different wavelengths under focused state to each layer of a double-layer disc loaded in an optical apparatus, and identifying if the double-layer disc is a recordable double-layer disc, a rewritable double-layer disc or a ROM-type double-layer disc corresponding to the combination of reflectance of each obtained light. It is preferable that the wavelength of one light is a wavelength for DVD-based disc and the wavelength of the other light is a wavelength for CD-based disc.
Description
Technical field
The present invention relates to 2 layers of disk distinguishing method and optical disc apparatus.
Background technology
In recent years, as CD various kinds are arranged, except when first CD series of discs (CD-ROM, CD-R, CD-RW etc.), it with the high density recording stage that market sale was also developed and reached to the DVD series of discs (DVD-ROM, DVD ± R, DVD ± RW etc.) of feature energetically, and, about a dish,, generally be that 2 layers of dish have been finished various schemes also to being used for further increasing the multilayer disc of memory capacity.Particularly reached the market sale stage about 2 layers of DVD-ROM.
Under these circumstances, about loading the optical disc apparatus of these various dishes, requirement is can be with 1 compatible type of dealing with these various dishes.For example, in the optical disc apparatus of the processing that can carry out DVD series CD, the dish of DVD series not only, also requirement can be carried out the record or the reproduction of the CD of CD series.
When constituting such compatible type CD device, because the kind of CD, the situation that its recording of information or reproducting method or its condition (parameter class) are different is a lot, so need differentiate the kind of the CD that loads in this optical disc apparatus before record or reproducing movement.
As differentiating relevant prior art with such dish, for example, about DVD type dish, can be when having shone a wavelength light, the reflectivity of 1 layer of dish of ROM type and 1 layer of dish of Worm type is more than or equal to 45%, and the reflectivity of 2 layers of dish of ROM type and 1 layer of dish of rewriting type is learnt the different of Worm type dish, rewriting type dish, ROM type dish more than or equal to 18% smaller or equal to 30%.
In the past, wavelength with CD enters focusing and observes the RF signal level, is CD-ROM or CD-R if high reflectance (45～60%) is then differentiated, and is CD-RW if antiradar reflectivity (15%～30%) is then differentiated, and then apply tracking and the observation sigmoid curve, thereby confirm whether be CD series again.But, when differentiation is CD-R or CD-ROM, owing to need further by writing down or utilizing to have or not to swing to wait and differentiate, so spended time.Judging when not being CD, then transfer to the differentiation of DVD.At this moment, 1 layer of medium of ground floor only arranged in DVD-ROM and ground floor is arranged and 2 layers of medium of 2 layers of the second layers, because the only ground floor of 1 layer of medium is high reflection (45%～60%), so can determine, but the ground floor of the DVD-ROM of 2 layers of medium is identical with DVD ± RW medium with DVD ± R2 layer with the second layer, so only can not judge with reflectivity.Therefore, the same with CD, having or not swing, and applying and follow the tracks of and observe sigmoid curve and confirmed after the DVD, write down that to differentiate DVD-R still be that the process of DVD-RW is long, spended time.
And, according to patent documentation 1, following method has been proposed, promptly, imagination compatible type CD device is installed CD usefulness and DVD with two kinds of LASER Light Source, makes these LASER Light Source temporarily luminous separately, thereby obtain all after the catoptrical reflected signal, focus error signal, tracking error signal based on each laser, according to these signal messages kind of differentiation dish synthetically.
And, for example according to patent documentation 2, following disk distinguishing method having been proposed also, this method has the step of implementing focus servo; Obtain the step of the tracking error signal of the push pull mode that obtains from CD; The amplitude and the setting of this tracking error signal are compared, differentiate the kind of CD, for example the step of one of them of DVD-RAM and DVD-RW, DVD+RW.And, also proposed to utilize the method for the frequency of swinging signal.
But, under the situation of patent documentation 1, do not preestablish the differentiation of the dish of 2 layers of type, about (DVD-ROM between the DVD dish of 2 layers of type, DVD ± R, DVD ± RW) can not differentiate its kind, and judge synthetically that according to reflected signal, focus error signal, tracking error signal etc. it is complicated that juggling becomes.
And, under the situation of patent documentation 2, frequency according to the swinging signal of push-pull signal is carried out the differentiation of DVD-RAM and DVD ± RW, can carry out the differentiation of these DVD1 layer dishes and DVD-2 layer ROM, but, about (DVD-ROM, DVD ± R, DVD ± RW) can not differentiate its kind between the DVD dish of 2 layers of type.
Patent documentation 1: the spy opens flat 11-306650 communique
Patent documentation 2: the spy opens the 2002-312933 communique
Summary of the invention
The objective of the invention is to make the differentiation of the kind (2 layers of dish of Worm type, 2 layers of dish of rewriting type, 2 layers of dish of ROM type) of 2 layers of dish simply and correctly to carry out.
Above-mentioned problem is by following 1)～8) invention (below, be called the present invention 1～8) solve.
1) a kind of 2 layers of disk distinguishing method, it is characterized in that, this method has: for each layer of 2 layers of dish that in optical disc apparatus, load, will be as the DVD series of discs with wavelength and CD series of discs with different two light of the wavelength of wavelength to close burnt state and shine respectively and the step of asking the reflectivity of 2 wavelength light; And according to the combination of the reflectivity of 2 wavelength light of obtaining, any step of 2 layers of dish of ROM type of 2 layers of dish of Worm type that to differentiate described 2 layers of dish be DVD series, 2 layers of dish of rewriting type of DVD series, DVD series.
2) as 1) described 2 layers of disk distinguishing method, it is characterized in that, the combination of the reflectivity of 2 wavelength light of being obtained, at the reflectivity of 2 wavelength light all is to differentiate under more than or equal to 15% situation to be 2 layers of dish of ROM type of DVD series, reflectivity in 1 wavelength light is more than or equal to 15%, the reflectivity of other 1 wavelength light is less than under 15% the situation more than or equal to 4%, differentiate and be 2 layers of dish of Worm type of DVD series, the reflectivity of 2 wavelength light all be more than or equal to 4% less than 15% situation under, differentiate 2 layers of dish of rewriting type for DVD series.
3) as 2) described 2 layers of disk distinguishing method, it is characterized in that, by the combination of the reflectivity of 2 wavelength light obtained, all be to differentiate under less than 4% situation to be specification dish in addition at the reflectivity of 2 wavelength light.
4) as 1) to 3) any one described 2 layers disk distinguishing method, comprising: judgement is the 1 layer of dish or the step of 2 layers of dish.
5) as 1) to 4) any one described 2 layers disk distinguishing method, comprising: judgement is the step of CD series of discs or DVD series of discs.
6) a kind of optical disc apparatus is characterized in that, described optical disc apparatus comprises: optical picking-up head, and have as the DVD series of discs and use wavelength and CD series of discs with two different light sources of wavelength of wavelength, the CD that is loaded is optionally shone 2 wavelength light; Record number of plies judgement part in dish kind discrimination model, differentiates whether the dish that is loaded is 2 layers of dish; Reflectivity calculates parts, is under the situation of 2 layers of dish at the dish that is loaded, and light wavelength is different by described optical picking-up head all shine respectively each layer of these 2 layers of dishes to close burnt state, thereby asks the reflectivity of 2 wavelength light; And 2 layers of dish judgement part, according to by the combination of the reflectivity of 2 wavelength light obtained, 2 layers of dish of ROM type of 2 layers of dish of Worm type that to differentiate these 2 layers of dishes be DVD series, 2 layers of dish of rewriting type of DVD series, DVD series any.
7) as 6) described optical disc apparatus, it is characterized in that, described 2 layers of dish judgement part are in the combination of the reflectivity of 2 wavelength light of being obtained, the reflectivity of 2 wavelength light all is to be 2 layers of dish of ROM type of DVD series more than or equal to differentiating under 15% the situation, reflectivity in 1 wavelength light is more than or equal to 15%, the reflectivity of other 1 wavelength light is less than under 15% the situation more than or equal to 4%, differentiate and be 2 layers of dish of Worm type of DVD series, the reflectivity of 2 wavelength light all be more than or equal to 4% less than 15% situation under, differentiate 2 layers of dish of rewriting type for DVD series.
8) as 7) described optical disc apparatus, it is characterized in that described 2 layers of dish judgement part are in the combination of the reflectivity of 2 wavelength light of being obtained, the reflectivity of 2 wavelength light all is to be the dish beyond the specification less than differentiating under 4% the situation.
According to foregoing invention 1, the kind that can utilize the difference of the combination of the reflectivity when having shone different wavelength light to come simply and correctly to differentiate 2 layers of dish.
And, according to foregoing invention 2, can utilize two light sources that load in so-called DVD series and the CD series compatible type CD device, easily differentiate the kind of 2 layers of dish.
And, according to foregoing invention 3,, can also make the different scope of combination of reflectivity of 2 layers of dish clear and definite except realizing the present invention 1 or 2.
And, according to foregoing invention 4, also can suitably differentiate about out-of-spec dish.
And, according to foregoing invention 5, can suitably select to distinguish 2 layers of dish.
And, according to foregoing invention 6, can suitably select to distinguish 2 layers of dish of DVD series.
And of the present invention 1～4 effect and effect also can realize equally by the present invention 7～10 optical disc apparatus.
Description of drawings
Fig. 1 is the frame assumption diagram of signal processing system of the optical disc apparatus of main body ground expression an embodiment of the invention.
Fig. 2 is the general flowchart of indicating panel kind juggling example.
Fig. 3 is the follow-up general flowchart of indicating panel kind juggling example.
Embodiment
An embodiment of the invention are described with reference to the accompanying drawings.
The optical disc apparatus of present embodiment is represented the application examples to the optical disc apparatus 1 of CD/DVD series compatible type, and Fig. 1 is the frame assumption diagram of the signal processing system of this optical disc apparatus of main body ground expression.
Promptly, present embodiment is the application examples to optical disc apparatus, this optical disc apparatus has to send the optical pick-up head 5 of light source cell 4 of chip of semiconductor laser (light source) 3 of laser of the wavelength 660nm of semiconductor laser (light source) 2 of laser of wavelength 780nm of CD series usefulness and DVD series usefulness built-in, can be shared to the CD 6 of CD series/DVD series 1 stratotype/DVD series 2 stratotypes.More particularly, be as CD 6, can utilize the example of the optical disc apparatus of CD-ROM, CD-R, CD-RW, DVD-ROM, DVD ± R, DVD ± RW, DVD-2 layer ROM (2 layers of dish of ROM type), DVD ± 2 layer R (2 layers of dish of Worm type), DVD ± 2 layer RW (2 layers of dish of rewriting type).
In the optical disc apparatus 1 of Fig. 1, axle motor 26 rotations that CD 6 is configured the major part of rotary drive mechanism drive.This motor 26 by motor driver 7 and servo component 8 for example linear velocity control definitely.This linear velocity can be classified to change.Optical pick-up head 5 is except the optical system of built-in semiconductor laser 2 and 3, corresponding object lens (not shown) etc., tracking/focusing regulator (not shown) etc., also built in light receiving element and position transducer shine from being selected the semiconductor laser 2 of ground driving or 3 laser CD 6.And this optical pick-up head 5 can move to hammering (sledge) direction by searching motor (seek motor) (not shown).These tracking/focusing regulators and search motor according to the signal that obtains from light receiving element and position transducer are controlled by motor driver 7 and servo component 8, so that the point of laser is positioned at the purpose place on the CD 6.
Then, when reading, the reproducing signal that is obtained by optical pick-up head 5 is amplified by reproducing signal treatment circuit 11 and by after the binaryzation, is transfused to CD/DVD demoder 12.The binaryzation data that are transfused in this CD/DVD demoder 12 by EFM (Eight to Fourteen Modulation, 8-14 modulation) demodulation.And per 8 bits of record data are concentrated to carry out the EFM modulation, in this EFM modulation, 8 bits are transformed to 14 bits, and additional 3 bits add up to 17 bits in conjunction with bit.At this moment, equate fifty-fifty to add like that in conjunction with the quantity of bit with before this " 1 " and " 0 ".Be referred to as " inhibition of DC component ", the cut-off level change of the reproducing signal that is ended by DC is suppressed.
Deinterleaved and the processing corrected of mistake by demodulated data.Afterwards, these data are transfused to CD/DVD-ROM demoder 13, in order to improve the reliability of data, carry out the processing that mistake is corrected once more.The data of having carried out the processing that twice mistake correct like this are temporarily stored in buffer memory RAM15 by cache manager 14, under the state as the sector data alignment, once are sent to principal computer 30 via ATAPI/SCSI interface 16.And under the situation of music data, the data of exporting from CD/DVD demoder 12 are imported into D/A converter 17, and the audio output signal audio frequency (Audio) 40 that is used as simulation takes out.
And, to write fashionablely, the data by ATAPI/SCSI interface 16 is sent here from principal computer temporarily are stored among the buffer memory RAM15 by cache manager 14.Then, in buffer memory RAM15, accumulated under the state of data of amount of certain degree, the beginning write activity, but at this moment, need laser spots is positioned at and write the beginning place.This place is obtained by the swinging signal that is engraved in advance on the CD 6 by crawling of track.
Comprise the absolute time information that is called as ATIP in swinging signal, this information is taken out by atip decoder 18.And the synchronizing signal that is generated by this atip decoder 18 is transfused to CD scrambler 19, can carry out data to the tram on the CD 6 and write.The data of buffer memory RAM15 are in CD-ROM scrambler 20 and CD scrambler 19, carry out mistake and correct additional and interweave (interleave) of sign indicating number, the laser controller of using via CD-R/RW 21, the semiconductor laser 2 in the optical pick-up head 5 are recorded in the CD 6.
And, the control of the integral body of such optical disc apparatus is by having ROM22, RAM23 and constituting the CPU24 control of microcomputer, under the situation of the CD 6 that has loaded DVD-series, the laser controller of using by DVD 25 makes the semiconductor laser 3 in the optical pick-up head 5 luminous, thereby carries out record or reproducing movement to CD 6.Thus, laser controller 21,25 and CPU24 make semiconductor laser 2,3 in the light source cell 4 select the light source drive part spare of selecting to drive in a ground as the kind according to CD 6 to work.
In so basic structure, in the present embodiment, in this optical disc apparatus 1, loaded under the situation of CD 6, should carry out the processing of the dish kind discrimination model that is used to differentiate this dish kind, but, (have feature in the diagnostic method of the kind of the situation of DVD-ROM, DVD ± R, DVD ± RW) having loaded 2 layers of dish as CD 6 especially.
Promptly, in the present embodiment, in record or reproducing movement to these 2 layers of dishes, in fact the light of the semiconductor laser 2 of obsolete CD series usefulness and the light of original record or used again semiconductor laser 3 are used together, thereby ask the reflectivity of each wavelength light, the combination of reflectivity that is conceived to each wavelength light is because the kind of 2 layers of dish and different these points make up the kind of differentiating 2 layers of dish corresponding to this.
At first, as this 2 layers of dish, preparing dvd+R (pigment series of samples), DVD+RW (phase-change type sample) and DVD-ROM (hole type medium), behind reflectivity when the reflectivity when having measured the wavelength light of having shone the 660nm that DVD uses and the wavelength light of having shone the 780nm that CD uses, obtain the result shown in the table 1 as this data example (standard).
(table 1)
| DVD wavelength 660nm | CD wavelength 780nm | |
| DVD+R pigment series of |
18 | 6 |
| DVD+RW phase- |
8 | 5 |
| DVD-ROM |
23 | 23 |
In addition, as 1 layer of dish, preparing dvd+R (pigment series of samples), DVD+RW (phase-change type sample) and DVD-ROM (hole type medium), behind reflectivity when the reflectivity when having measured the wavelength light of having shone the 660nm that DVD uses and the wavelength light of having shone the 780nm that CD uses, obtain the result shown in the table 2 as this data example (standard).
(table 2)
| DVD wavelength 660nm | CD wavelength 780nm | |
| DVD+R pigment series of samples | 48 | 8 |
| DVD+RW phase- |
20 | 12 |
| DVD-ROM hole type medium | 55 | 55 |
At first, according to the data example (standard) shown in the table 1,,, can judge according to the combination of the reflectivity in each wavelength light of 660nm, 780nm at the kind time-like of differentiating 2 layers of dish by reflectivity:
Under 2 wavelength light all are situation more than or equal to 15% reflectivity: DVD-ROM
In the DVD wavelength light is reflectivity more than or equal to 15%, and the CD wavelength light is more than or equal under 4% the situation less than 15% reflectivity: DVD+R
2 wavelength light all be more than or equal to 4% situation less than 15% reflectivity under: DVD+RW.
And, coil outside under 2 wavelength light all are situation less than 4% reflectivity, can differentiating for specification.
And, in 2 layers of dish, for DVD-R and DVD-RW, because the reflectivity of DVD-R and DVD+R, DVD-RW and DVD+RW is identical respectively, thus the same with DVD+R and DVD+RW, can differentiate by DVD-ROM etc.And, because DVD-R, DVD-RW cheat to forming near the 24mm at dish radius 23.9mm, if so when observing the reflectivity of each medium of this dish radius part with the low-pass filter of 30KHz degree, reflectivity is 6 one-tenth to 7 one-tenth zone of recording status not, then be DVD-R or DVD-RW, can differentiate from DVD+R, DVD+RW.
In addition, about DVD1 layer dish, as the driver of market sale is carried out, can be judged as DVD-ROM or DVD-R by reflectivity more than or equal to 45%, by being judged as DVD-RW more than or equal to 18% reflectivity smaller or equal to 30%, but,, then can carry out to judge as also utilizing the reflectivity Characteristics of the wavelength correspondence shown in the table 2 about such DVD1 layer dish:
Under 2 wavelength light all are situation more than or equal to 45% reflectivity: DVD-ROM
In the DVD wavelength light is reflectivity more than or equal to 45%, and the CD wavelength light is more than or equal under 5% the situation less than 18% reflectivity: DVD+R
In the DVD wavelength light is more than or equal to 18% smaller or equal to 30% reflectivity, and the CD wavelength light is more than or equal under 5% the situation less than 18% reflectivity: DVD+RW
Coil outside under 2 wavelength light all are situation less than 5% reflectivity, can differentiating for specification.
Utilize the reflectivity Characteristics of such wavelength correspondence, in the optical disc apparatus 1 of present embodiment, under the control of CPU24, carried out dish kind juggling, particularly 2 layers of dish kind juggling according to Fig. 2 and general flowchart shown in Figure 3.
In the present embodiment, under the situation of having loaded CD 6, be programmed as dish kind juggling pattern, to carry out following juggling.
All the time monitor whether loaded certain CD 6 (step S1), when detecting dish and load ("Yes" of S1), on one side driving shaft motor 26 make this CD 6 rotations (S2), transfer to the execution (S3) of dish kind discrimination model on one side.
Then, semiconductor laser 3 light emitting drive (S4) that DVD as a side light source is used, via servo component 8, motor driver 7, focusing regulator etc. moved to focus direction with certain speed in the focal position of laser, carry out so-called focusing scanning (sweep) (S5).Reflected light amount signal, the focus error signal that will obtain when this focusing scanning are taken into (S6) via reproducing signal treatment circuit 11, according to these calculated signals from the surface of CD 6 distance to record surface, according to this distance, at first differentiating this CD 6 is CD series of discs or DVD series of discs (S7).As known in the art, utilize under the situation of CD series of discs, to be about 1.2mm, under the situation of DVD series of discs, be about the situation of 0.6mm.
This discrimination result, the distance more than according to the rules (thickness) are differentiated and to be ("No" of S7) under the situation of CD series of discs, after, it is just passable for example to carry out the juggling of kind of CD dish by known method in patent documentation 2 grades.
On the other hand, the distance below according to the rules (thickness) is differentiated and to be ("Yes" among the S7) under the situation of DVD series of discs, differentiates the number of plies (S8) of the record surface of this CD 6 according to reflected light amount signal and focus error signal.The processing of this step S8 is carried out as the function of record number of plies judgement part, and is also known in patent documentation 2 grades for example about this technology, so omissions of detail.
The result of distinguishing numbers of layers, in differentiation ("Yes" of S8) under the situation of 2 layers of dish, receive by light receiving element to close the burnt later reflected light of state irradiation by irradiates light to the 1st recording layer (the 1st layer) with this semiconductor laser 3, and handle the RF signal level that obtains with reproducing signal treatment circuit 11 and ask its reflectivity (S9), and then the 2nd recording layer (the 2nd layer) focused on introducing (S10), reflected light when to close burnt state the 2nd recording layer (the 2nd layer) being shone by receive irradiates light with semiconductor laser 3 with light receiving element, and the RF signal level that is obtained by 11 processing of reproducing signal treatment circuit asks its reflectivity (more particularly, the RF signal level of the absolute reflectance correspondence that setting is checked in advance with reproduction light power, by with this value relatively ask reflectivity just can) (S11).Be temporarily stored in RAM23 etc. by the reflectivity obtained.
Then, replace semiconductor laser 3 and make the semiconductor laser 2 luminous (S12) of the wavelength of the 780nm that CD uses, the 1st recording layer (the 1st layer) is focused on introducing (S13), reflected light when to close burnt state the 1st recording layer (the 1st layer) shine by receive irradiates light with semiconductor laser 2 with light receiving element, and the RF signal level that is obtained by 11 processing of reproducing signal treatment circuit is asked its reflectivity (S14).And then, the 2nd recording layer (the 2nd layer) is focused on introducing (S15), reflected light when to close burnt state the 2nd recording layer (the 2nd layer) shine by receive irradiates light with semiconductor laser 2 with light receiving element, and the RF signal level that is obtained by 11 processing of reproducing signal treatment circuit is asked its reflectivity (S16).Also be temporarily stored in RAM23 etc. by the reflectivity obtained.
The processing of these steps S9～S16 is used as reflectivity and calculates the functions of components execution.
Then, according to by the combination of the reflectivity in each wavelength light of obtaining, utilize foregoing threshold value to differentiate the kind of this CD 6.
That is, 2 wavelength light all be more than or equal to the situation of 15% reflectivity under ("Yes" of S17), differentiate for DVD-ROM (S18).
And, be reflectivity in the DVD wavelength light, and the CD wavelength light is more than or equal to 4% less than under the situation of 15% reflectivity ("No" of S17, the "Yes" of S19), differentiates for DVD+R (S20) more than or equal to 15%.
And, 2 wavelength light all be more than or equal to 4% less than the situation of 15% reflectivity under ("No" of S17, the "No" of S19, the "Yes" of S21), differentiate for DVD+RW (S22).
And then, 2 wavelength light all be less than the situation of 4% reflectivity under ("No" of S21), differentiate for specification and coil (S23) outward.
The processing of these steps S17～S23 is as the function executing of 2 layers of dish judgement part.
The differentiation result of such 2 layers of dish is provided for the device setting that record after this or reproducing movement use etc.
And, the result of distinguishing numbers of layers, as being the processing of ("No" of S8) under the situation of 1 layer of dish differentiating, with the same in the past to carry out later juggling just passable, but it is also passable to utilize 2 wavelength light to carry out as shown in Figure 3.
At first, the reflected light when to close burnt state the 2nd recording layer (the 2nd layer) shine by receive irradiates light with semiconductor laser 3 with light receiving element, and the RF signal level that is obtained by 11 processing of reproducing signal treatment circuit is asked its reflectivity (S31).Be temporarily stored in RAM23 etc. by the reflectivity obtained.
Then, replace semiconductor laser 3 and make the semiconductor laser 2 luminous (S32) of the wavelength of the 780nm that CD uses, recording layer is focused on introducing (S33), reflected light when to close burnt state recording layer shine by receive irradiates light with semiconductor laser 2 with light receiving element, and the RF signal level that is obtained by 11 processing of reproducing signal treatment circuit is asked its reflectivity (S34).Also be temporarily stored in RAM23 etc. by the reflectivity obtained.
Then, according to by the combination of the reflectivity in each wavelength light of obtaining, utilize threshold value to differentiate the kind of this CD 6 as described above.
That is, 2 wavelength light all are more than or equal under the situation of 45% reflectivity ("Yes" of S35), differentiate for DVD-ROM (S36).
And, be reflectivity in the DVD wavelength light, and the CD wavelength light is more than or equal to 5% less than under the situation of 18% reflectivity ("No" of S35, the "Yes" of S37), differentiates for DVD+R (S38) more than or equal to 45%.
And, be more than or equal to 18% smaller or equal to 30% reflectivity in the DVD wavelength light, and the CD wavelength light is more than or equal to 5% less than under the situation of 18% reflectivity ("No" of S35, the "No" of S37, the "Yes" of S39), differentiates for DVD+RW (S40).
2 wavelength light all be less than the situation of 5% reflectivity under ("No" of S39), differentiate for specification and coil (S41) outward.
Then, the juggling result based on the concrete example of 2 layers of dish is described.
(concrete example 1)
Under the situation of DVD+RW (2 layers of phase-change type sample),, set gradually the 1st protective seam (ZnSSiO having on the 1st transparency carrier (polycarbonate) of guide groove
2, thickness 70nm), the 1st information recording layer (Ag
5In
5Ge
5Sb
67Te
18, thickness 17nm), the 2nd protective seam (ZnSSiO
2, thickness 17nm), the reflection horizon (Ag, thickness 120nm) of easy heat radiation is set thereon and forms the 1st information interrecord structure body.
On the other hand, have on the transparency carrier of guide groove (polycarbonate), setting gradually protective seam (ZnSSiO2, thickness 65nm), recording layer (Ag
5In
5Ge
5Sb
67Te
18, thickness 7nm), protective seam (ZnSSiO2, thickness 18nm), ZrCO layer (thickness 3nm), reflection horizon Ag, thickness 10nm), semitransparent layer (ITO, In
2O
3With the potpourri of SnO, thickness 100nm) and formed the 2nd recording layer structure body.
The UV hardening resin (SD318) of the 1st recording layer structure body and the 2nd recording layer structure body and function thickness 55 μ m is bonding and obtain 2 layers of dish.
If the substrate track space 0.8 μ m of the 1st recording layer structure body, the substrate track space 0.74 μ m of the 2nd recording layer structure body.
Carried out after the servocontrol to above-mentioned 2 layers of dish, with DVD wavelength=660nm, focus on and enter 2 layers well, the reflectivity of each layer is 7% and 8%, and, even when CD wavelength=780nm, it is 8% and 10% that the reflectivity of each layer detects, if according to summary flow process shown in Figure 2, then 2 wavelength light all are less than 15% reflectivity more than or equal to 4%, by step S21, S22, can be judged as 2 layers DVD+RW.
(concrete example 2)
Silk screen on the light entrance face of the dish that in concrete example 1, makes and the reflecting surface (screen) printing (UV cured) spray paint (lacquer), the result who increases this resin face on the light entrance face and be loaded into optical disc apparatus 1 is that the reflectivity that the RF signal when having carried out with DVD wavelength=660nm and CD wavelength=780nm focusing on is obtained is 1%, is judged as any one that is not ROM type, R type, RW type.That is,, can differentiate by step S23 and to be out-of-spec dish according to summary flow process shown in Figure 2.
(concrete example 3)
On the 1st substrate of polycarbonate system, cover (ス ピ Application コ one ト) mode with rotation and form the 1st uvea (cyanine), thereon as the 1st semitransparent layer, formed IZO (In in the sputter mode
2O
3Potpourri with ZnO).On the other hand, on the 2nd substrate of polycarbonate system, as the 2nd semitransparent layer, formed IZO in the sputter mode after, formed the 2nd uvea (cyanine) with the rotation coverage mode.Then, opposed mutually with having formed the 1st substrate of the 1st uvea etc. and having formed the 2nd uveal the 2nd substrate, so that uvea is positioned at the inboard, thereby obtain 2 layers of dish so that UV hardening resin (SD318) is bonding.
And following such control of the thickness of each structural sheet made.
Two substrates: 0.6mm, the 1st uvea: 60nm, the 1st semitransparent layer: 80nm, resin interlayer: 55 μ m, the 2nd uvea: 70nm, the 2nd semitransparent layer: 100nm
And the track space of establishing the 1st substrate is 0.74 μ m, and the track space of the 2nd substrate is 0.80 μ m.
Carried out after the servocontrol to above-mentioned 2 layers of dish, with DVD wavelength=660nm, focus on and enter 2 layers well, the reflectivity of each layer is 19% and 18%, and, even when CD wavelength=780nm, it is 5% and 6% that the reflectivity of each layer detects, if according to summary flow process shown in Figure 2, then the reflectivity of the reflectivity of DVD wavelength light CD wavelength light more than or equal to 15% more than or equal to 4% less than 15%, by step S19, S20, can be judged as 2 layers DVD+R.
(concrete example 4)
On the 1st substrate of polycarbonate system, (add the hole), form SiN in thickness 10nm sputter mode as the 1st inorganic layer, and, on the other hand, on the 2nd substrate of polycarbonate system, form Al in thickness 100nm sputter mode as the 2nd inorganic layer
99Ti
1After, these substrates are disposed relatively, so that inorganic layer is positioned at the inboard, thus bonding with UV hardening resin (SD318, thickness 55 μ m).If the track space of the 1st substrate is 0.74 μ m, the track space of the 2nd substrate is 0.8 μ m.
Carrying out after the servocontrol to above-mentioned 2 layers of dish, with DVD wavelength=660nm, focus on and enter 2 layers well, the reflectivity of each layer is 25% and 26%, and, even when CD wavelength=780nm, the reflectivity of each layer is detected as 26% and 27%, if according to summary flow process shown in Figure 2, then 2 wavelength light all are the reflectivity more than or equal to 15%, by step S17, S18, can be judged as 2 layers DVD-ROM.
According to the present invention 1 and 7, utilize the difference of the combination of the reflectivity when having shone different wavelength light, 2 layers of dish are differentiated its kinds, so only just can be simply and correctly differentiate its kind with reflectivity.
According to of the present invention 2 and 8,, can realize the present invention 1 and 7 easily by utilizing two light sources installing in so-called and DVD series and the CD series compatible type dish device.
According to of the present invention 3 and 9, except the different scope of the combination of the reflectivity of realizing 1,2,7 and 8,2 layer of dish of the present invention also becomes clear and definite.
According to the present invention 4 and 10, also can carry out appropriate differentiation to the outer dish of specification.
Claims (8)
1. 2 layers of disk distinguishing method is characterized in that this method has:
For each layer of 2 layers of dish that in optical disc apparatus, load, will be as the DVD series of discs with wavelength and CD series of discs with different two light of the wavelength of wavelength to close burnt state and shine respectively and the step of asking the reflectivity of 2 wavelength light; And
According to the combination of the reflectivity of 2 wavelength light of obtaining, any step of 2 layers of dish of ROM type of 2 layers of dish of Worm type that to differentiate described 2 layers of dish be DVD series, 2 layers of dish of rewriting type of DVD series, DVD series.
2. 2 layers of disk distinguishing method as claimed in claim 1,
The combination of the reflectivity of 2 wavelength light of being obtained, at the reflectivity of 2 wavelength light all is to differentiate under more than or equal to 15% situation to be 2 layers of dish of ROM type of DVD series, reflectivity in 1 wavelength light is more than or equal to 15%, the reflectivity of other 1 wavelength light is less than under 15% the situation more than or equal to 4%, differentiate and be 2 layers of dish of Worm type of DVD series, the reflectivity of 2 wavelength light all be more than or equal to 4% less than 15% situation under, differentiate 2 layers of dish of rewriting type for DVD series.
3. 2 layers of disk distinguishing method as claimed in claim 2,
By the combination of the reflectivity of 2 wavelength light obtained, all be to differentiate under less than 4% situation to be specification dish in addition at the reflectivity of 2 wavelength light.
4. 2 layers of disk distinguishing method as claimed in claim 1 comprise:
Judgement is the 1 layer of dish or the step of 2 layers of dish.
5. 2 layers of disk distinguishing method as claimed in claim 1 comprise:
Judgement is the step of CD series of discs or DVD series of discs.
6. an optical disc apparatus is characterized in that, described optical disc apparatus comprises:
Optical picking-up head has as the DVD series of discs and uses wavelength and CD series of discs with two different light sources of wavelength of wavelength, and the CD that is loaded is optionally shone 2 wavelength light;
Record number of plies judgement part in dish kind discrimination model, differentiates whether the dish that is loaded is 2 layers of dish;
Reflectivity calculates parts, is under the situation of 2 layers of dish at the dish that is loaded, and light wavelength is different by described optical picking-up head all shine respectively each layer of these 2 layers of dishes to close burnt state, thereby asks the reflectivity of 2 wavelength light; And
2 layers of dish judgement part, according to by the combination of the reflectivity of 2 wavelength light obtained, 2 layers of dish of ROM type of 2 layers of dish of Worm type that to differentiate these 2 layers of dishes be DVD series, 2 layers of dish of rewriting type of DVD series, DVD series any.
7. optical disc apparatus as claimed in claim 6,
Described 2 layers of dish judgement part are in the combination of the reflectivity of 2 wavelength light of being obtained, the reflectivity of 2 wavelength light all is to be 2 layers of dish of ROM type of DVD series more than or equal to differentiating under 15% the situation, reflectivity in 1 wavelength light is more than or equal to 15%, the reflectivity of other 1 wavelength light is less than under 15% the situation more than or equal to 4%, differentiate and be 2 layers of dish of Worm type of DVD series, the reflectivity of 2 wavelength light all be more than or equal to 4% less than 15% situation under, differentiate 2 layers of dish of rewriting type for DVD series.
8. optical disc apparatus as claimed in claim 7,
Described 2 layers of dish judgement part are in the combination of the reflectivity of 2 wavelength light of being obtained, and the reflectivity of 2 wavelength light all is to be the dish beyond the specification less than differentiating under 4% the situation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003200209 | 2003-07-23 | ||
| JP200209/2003 | 2003-07-23 | ||
| JP066108/2004 | 2004-03-09 |
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| CN1826638A CN1826638A (en) | 2006-08-30 |
| CN100418141C true CN100418141C (en) | 2008-09-10 |
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| CNB2004800208979A Expired - Fee Related CN100418141C (en) | 2003-07-23 | 2004-07-21 | Method for identifying double-layer disc and optical disc apparatus |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09282783A (en) * | 1996-02-14 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
| JPH1166622A (en) * | 1997-08-25 | 1999-03-09 | Taiyo Yuden Co Ltd | Optical information medium and its recording and reproducing method |
| JPH11306650A (en) * | 1998-04-15 | 1999-11-05 | Toshiba Corp | Optical disk class discriminating device and optical disk class discriminating method |
| CN1336660A (en) * | 2000-05-16 | 2002-02-20 | 船井电机株式会社 | Device for reproducing digital video disc |
| CN1366660A (en) * | 2000-04-21 | 2002-08-28 | 松下电器产业株式会社 | Optical disc drive and method for determining type thereof |
-
2004
- 2004-07-21 CN CNB2004800208979A patent/CN100418141C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09282783A (en) * | 1996-02-14 | 1997-10-31 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
| JPH1166622A (en) * | 1997-08-25 | 1999-03-09 | Taiyo Yuden Co Ltd | Optical information medium and its recording and reproducing method |
| JPH11306650A (en) * | 1998-04-15 | 1999-11-05 | Toshiba Corp | Optical disk class discriminating device and optical disk class discriminating method |
| CN1366660A (en) * | 2000-04-21 | 2002-08-28 | 松下电器产业株式会社 | Optical disc drive and method for determining type thereof |
| US20020159363A1 (en) * | 2000-04-21 | 2002-10-31 | Kazuhiro Takeuchi | Optical disc drive and method for determining type thereof |
| CN1336660A (en) * | 2000-05-16 | 2002-02-20 | 船井电机株式会社 | Device for reproducing digital video disc |
Non-Patent Citations (3)
| Title |
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| JP11-306650(A) 1999.11.05 |
| JP11-66622(A) 1999.03.09 |
| JP9-282783(A) 1997.10.31 |
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| CN1826638A (en) | 2006-08-30 |
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