CN101241743A - Defect management method and device for optical recording medium - Google Patents
Defect management method and device for optical recording medium Download PDFInfo
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- CN101241743A CN101241743A CN 200810083182 CN200810083182A CN101241743A CN 101241743 A CN101241743 A CN 101241743A CN 200810083182 CN200810083182 CN 200810083182 CN 200810083182 A CN200810083182 A CN 200810083182A CN 101241743 A CN101241743 A CN 101241743A
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Abstract
The invention provides a method and an apparatus for recording management information of an optical recording medium with at least a temporary default management region, the method comprises: updating default management information; recording the updated default management information in the temporary default management region; and recording the last updated default management information in the temporary default management region and pointing to locator information of the last updated default management information, when the recording medium is retreated.
Description
The application be the applying date be " on February 25th, 2004 ", application number for " 200480008748.0 ", be entitled as dividing an application of " defect management method of optical record medium and use the optical record medium of this method ".
Technical field
The present invention relates to optical record medium, relate in particular to the defect management method of optical record medium and the optical record medium of this method of use, wherein a plurality of temporary defect management area territory is used for defect management.
Background technology
CD is widely used as the recording medium of longer-term storage mass data.This recording medium can be divided into two big classes, comprises the dish of rewritable disk and Write-once type.When using the Write-once type disc to come record data, can only carry out write operation one time to any given area, and rewritable disk just provides much bigger dirigibility, particularly at the defect area management aspect.Defect area is because of the manufacturing defect in the optical record medium or afterwards the lip-deep destruction of optical record medium was caused that it makes can't be at one or more bunches of identifying recording layers.
If find defect area in data recording during CD, but the data that then write defect area are re-written in the favored area of being distributed by manufacturer.Simultaneously, the locator information of sign defect area and replacement posting field thereof goes on record and is used for a defective of giving price fixing, as the defect management information in the defect management (DMA).Thereby even defective appears in dish on recording surface, the data that are recorded on the CD still can obtain reappearing.
Yet this technology is applied to rewritable disk usually, and it allows the free access to all data recording areas.Therefore the available less relatively DMA of any essential defect management finishes, and this DMA enables high-speed record.On the other hand, the Write-once type disc is because of its intrinsic writing the function restriction and need bigger DMA and more complicated defect management, and as a result of, data recording operation needs much more time usually.
Simultaneously, the novel high-density optical record medium that is called HD-DVD has been used for writing down and the Voice ﹠ Video data of storage of high quality.An example of HD-DVD recording medium is blue ray (Blu-ray) dish, name is because used blue beam (405 nanometer) like this, its density is more much bigger than the red ray that conventional DVD uses, and therefore can store much bigger data volume on standard-sized CD.The standardization of this technology is in progress, to comprise Write-once Blu-ray dish (BD-WO) and can rewrite the standard that Blu-ray coils (BD-RE), particularly about the detection of the defect area that detects during data recording operation and the standard of management.
Importantly, should consider to use the defect management of rewritable disk (for example BD-RE dish) to any standard of the defect management of Write-once type disc (for example BD-WO dish).Thereby standard should comprise the common trait with another as much as possible, with maintaining coherency and compatibility when making great efforts to carry out effective recording defect management information, so that the stable data reproduction process.
In any case, the management of defect area is crucial during data recording, particularly for high density DVD such as the Bluray dish, but current BD WO standard and insufficient.Need a kind of unitized standard, it can adapt to the progressive demand of business system to optical storage of data.
Summary of the invention
Therefore, the present invention relates to be used for the defect management method of optical record medium, and the optical record medium that uses this method, the one or more problems that cause because of the restriction of correlation technique and shortcoming solved basically.
Now be designed to solve the target of the present invention of foregoing problems, be to provide a kind of method and apparatus, be recorded in a plurality of temporary defect management area territory of the optical record medium that coils such as Write-once Blu-ray by its defect management information, comprising last one or the nearest information of the position of defect management that specifies in the temporary defect management area territory, thereby represent nearest posting field and therefore comprise up-to-date information.
Another target of the present invention provides the defect management method of optical record medium, wherein reduces writing time.
Another target of the present invention provides the defect management method of optical record medium, and it is convenient to real time record.
Another target of the present invention provides the unitized standard of Write-once optical record medium.
Another target of the present invention provides this standard with rewritable optical record medium compatibility.
Another target of the present invention provides the more effective ways that are used for management of defective areas during data are recorded in the Write-once optical record medium.
Another target of the present invention provides a kind of method that is used at the enterprising line item of optical record medium, has wherein improved data security and data integrity.
Another target of the present invention provides a kind of method that is used for records management information on optical record medium, and it can make the adaptation to the continuous version of medium become possibility.
Another target of the present invention provides a kind of optical record medium that adopts above method.
Other features and advantages of the present invention will set forth in describing subsequently, and to those skilled in the art when reading following content in detail these feature and advantage will be in part apparent, or can learn from the practice of the present invention.The objectives and other advantages of the present invention will realize by the subject content that particularly points out in instructions, claims and accompanying drawing and obtain.
In order to realize these targets and other advantage according to the present invention, as in this and broadly described herein and including, a kind of method that the management information of optical record medium with at least one temporary defect management area territory is write down is provided, has comprised the steps: to upgrade defect management information; In described temporary defect management area territory, write down the defect management information that is upgraded; And when described recording medium is withdrawed from, the locator information of the defect management information of the defect management information of record recent renewal and sensing recent renewal in described temporary defect management area territory.
According to another aspect of the present invention, provide a kind of device that the management information of optical record medium with at least one temporary defect management area territory is write down, described device is configured to: at described recording medium identifying recording layer; Upgrade defect management information and be recorded in the defect management information that is upgraded that writes down in the described temporary defect management area territory; And when described recording medium is withdrawed from, the locator information of the defect management information of the defect management information of record recent renewal and sensing recent renewal in described temporary defect management area territory.
According to aspect in addition of the present invention, a kind of method that the data that are recorded in the recording medium with at least one temporary defect management area territory are reproduced of being used for is provided, described method comprises: reproduce the locator information that is recorded in the described temporary defect management area territory, described locator information is pointed to last defect management information; With reproduce described last defect management information from described at least one temporary defect management area territory, wherein, described last defect management information is by the defect management information of recent renewal before withdrawing from described recording medium.
According to aspect in addition of the present invention, a kind of device that the data that are recorded in the recording medium with at least one temporary defect management area territory are reproduced of being used for is provided, described device is configured to: reproduce the locator information that is recorded in the described temporary defect management area territory, described locator information is pointed to last defect management information; With reproduce described last defect management information from described at least one temporary defect management area territory, wherein, described last defect management information is by the defect management information of recent renewal before withdrawing from described recording medium.
Write-once Blu ray dish is specifically made following detailed description.Yet other Write-once type disc recording medium also can adopt method and apparatus of the present invention.In addition, although great majority are applicable to the CD that uses BD WO form, ultimate principle of the present invention can be adopted by the CD that uses other form, is used to improve data security and data globality.In addition, although each embodiment of the present invention is described with reference to single layer optical recording medium, identical general dish structure and defect management method can be applicable to double-deck optical record medium, have wherein used two main TDMA (every layer) and three additional TDMA.
Be appreciated that front of the present invention is described and detailed description subsequently all is exemplary and indicative, and aim to provide of the present invention further explanation being disclosed.
Description of drawings
Consult accompanying drawing, other purpose of the present invention and advantage can more fully be understood from following detailed description, in the accompanying drawings:
Fig. 1 is used to illustrate the diagrammatic sketch that is used for the defect management method of optical record medium according to the present invention;
Fig. 2 A-2C is the diagrammatic sketch of the TDMA of Fig. 1, and wherein Fig. 2 A and 2B illustrate the normal running of defect management method of the present invention, and Fig. 2 C illustrates a failure scenario;
Fig. 3 A and 3B are the diagrammatic sketch of the TDMA of Fig. 1, and the possibility of recording defect management information is shown; And
Fig. 4 is the diagrammatic sketch of the TDMA of Fig. 1, illustrates according to another embodiment of the present invention recording defect management information.
Embodiment
To quote the preferred embodiments of the present invention in detail now, its example is shown in the drawings.In these accompanying drawings, like uses same or similar label indication.
Fig. 1 illustrates the posting field such as the Write-once CD of Blu-ray dish, and so that the defect management method that is used for optical record medium to be shown according to the present invention, wherein defect management information is recorded in temporary defect management area territory (TDMA).Each layer for optical disc recording medium all provides a plurality of this TDMA to CD, and wherein each TDMA occupies at least one bunch.
Each TDMA comprises temporary disk (T-disk) definition structure (TDDS) information and temporary defect list or TDFL, their records of normally connecting, but omitted specifying and discussing for the present invention to TDFL.Except the counter of continuous updating, TDDS information comprises that corresponding locator information (being physical cluster number or PSN) appears in last (up-to-date) with defect management.Thereby defect management information writes down based on the locator information of last defect management and reproduces.When doing like this, the locator information of last defect management is recorded among the TDMA, and this information is registered as the newer field of a PSN form of last TDDS so that each field occupies 4 bytes.
In first preferred embodiment, locator information can be represented by single record, with the TDDS of the last record of indication in all TDMA.In second preferred embodiment, locator information can be represented by a plurality of records, comes the TDDS for the last record of each TDMA indication.At this, suppose that two TDMA are TDMA1 and TDMA2, TDDS information will comprise the PSN of the last record TDDS of TDMA1, and the PSN of the last record TDDS of TDMA2.In any situation, an example of locator information record is carried out each example of defect management, and corresponding with the position of current TDDS.
Simultaneously, the refresh counter of TDDS is upgraded each example of TDDS record, and each example of TDDS record is to each example of defect management or carry out on required interval, with reservation record space on the Write-once CD.That is, TDDS can upgrade after the booking situation amount, can renewal after upgrading predetermined amount of time from last time, or can upgrade based on the combination of each factor, comprise coiling exiting command.
In the preferred embodiment of Fig. 1, the posting field of optical record medium is divided into ingress area (LIA0), data area and export area (LOA0), and this data area comprises user data area and has inner spare area (ISA0) and the outside spare area (OSA0) that is distributed in arbitrary end.TDMA2 externally provides in the spare area, and the TDDS that carries out during writing down renewal is recorded on the TDMA2.When dish exited command, a TDDS upgraded and is recorded among the TDMA1 that provides in the ingress area.
Generally speaking, in TDMA, write down and finish by one of two kinds of methods; But when TDMA2 time spent record, thus promptly TDMA2 fully record its not posting field can be used for record, and when TDMA2 is unavailable record, thereby promptly TDMA2 all writes down and does not have other posting field and can use, wherein defect management is discontinuous.If TDMA2 is not useable for record, if perhaps TDMA2 does not provide on this dish, then can no defect management.
Suppose that TDMA2 can use, two record stages arranged in essence: during record and record thereafter.During writing down, upgrade whenever defect management information being recorded among the TDMA2 of TDDS information.Then, just before withdrawing from this dish, carry out final recording operation, the defect management information that will be recorded in TDMA2 by this operation during writing down records among the TDMA1.
When the TDDS information that will upgrade according to first preferred embodiment records among the TDMA1, the locator information of last defect management is recorded among the TDMA1 as the part of next TDDS among the TDMA2, and this locator information is represented the current state of the defect management information of continuous updating.What be included as the part that is recorded in the TDDS information of having upgraded among the TDMA1 is the locator information of last defect management, and its points to the current defect management information that is recorded in TDMA2.At this, the locator information of last defect management is the record position of previous TDDS, and this position can be by its refresh counter sign.That is, be N if be recorded in the value of the refresh counter among the nearest TDDS among the TDMA1, the value (being the record position of the last TDDS of TDMA2) of refresh counter that then is used for the locator information of last defect management should be N-1.At this, should be appreciated that the refresh counter of TDDS all rises in value when writing down at every turn or upgrading TDDS in TDMA1 and TDMA2.
On the other hand, do not have in the recordable situation of other defect management information thereby be not useable for record at TDMA2, TDMA1 is used to recording defect management information.In these cases, thereby can comprise that wherein dish does not have TDMA2 by the OSA that manufacturer distributes, defect management information can come record with limited manner, for example, and only when dish in use (during the record) or only when coiling (after the record) when being withdrawed from.
With reference to Fig. 2 A, suppose that TDDS information upgraded twice during a record, be recorded in respectively among the TDMA2 as TDDS1 and TDDS2.After the generation dish exits command, promptly after finishing this writing time, current TDDS information stores in TDMA1 as TDDS3.Therefore thereby TDDS3 comprises the locator information of nearest defect management, and comprises the locator information of TDDS of the last record of TDMA2, thereby can read TDMA1 to search current TDDS information.Continuing the beginning next record after the time, TDDS upgrades in TDMA as TDDS4, shown in Fig. 2 B.After end record and withdrawing from when dish, no matter the number of times that upgrades, next TDDS more new capital can be recorded among the TDMA1 as for example TDDS5, and it has comprised for example locator information of the previous TDDS of TDDS4, and this TDDS will be up-to-date TDDS.
At this, continuous numbering refers to the continuous renewal of TDDS.Further defer to above model writing time, the TDDS that carries out during writing down thus upgrades and is recorded among the TDMA2, before withdrawing from this dish last renewal is recorded among the TDMA1 simultaneously.Record failure scenario thereby can be discerned by reading TDMA1, with the value of the refresh counter of checking last record TDDS, and the value of last record TDDS among read value and the TDMA2 relatively.
That is, with reference to Fig. 2 C, wherein the record of TDDS5 is former thereby be unrealized because of some of for example power fail, and is littler than the value of the refresh counter of the TDDS4 of the last record TDDS of TDMA2 as the value of the refresh counter of the TDDS3 of the last record TDDS of TDMA1.Should be understood that in normal conditions the value of the refresh counter of the last record TDDS of TDMA1 is should be always bigger than the value of the refresh counter of the last record TDDS of TDMA2.
After the recognition failures situation,, can continue normally to carry out record by handling this failure with one of two kinds of methods.As a kind of selection, next TDDS is TDDS5 or " dish withdraws from " TDDS information, can be recorded at first as usual among the TDMA1, as required other TDDS is upgraded being recorded among the TDMA2 subsequently.The information of next TDDS is known by reading TDMA, to determine the highest refresh counter value.Because the TDDS information of continuous updating always comprises the locator information of previous T DDS, so can recover to withdraw from the information of losing because of morning quotation too.Select as another kind, lasting record can be undertaken by F.F. recording process simply, thereby skips dish and withdraw from the TDDS recording of information, comes next TDDS of record in TDMA2 as required, and carries out the defect management processing based on the last record TDDS of TDMA2.
Fig. 3 A and 3B illustrate the possibility that indicator withdraws from TDDS information.As shown in Figure 3A, dish withdraws from TDDS information and only is recorded among the TDMA1, but shown in Fig. 3 B, dish withdraws from TDDS information and is recorded among two TDMA.In any case, when dish withdraws from, all only write down last defect management information.
In will writing down the second embodiment of the invention of having upgraded TDDS information, by write down locator information in each TDMA, this locator information is represented the record position of last defect management in each TDMA.As shown in Figure 4, the TDDS information of having upgraded comprises locator information 1 and locator information 2, respectively as the access pointer that is recorded among TDMA1 and the TDMA2.Thereby each of TDDS information write down the locator information that new capital more comprises the last defect management of two TDMA.
Industrial Applicability A
According to the present invention, defect management information is recorded (updated) in one of two temporary defect management area territories, defect management information during its mid-game is used (promptly when dish in use) is recorded among the TDMA, and dish withdraws from defect management information and is recorded among another TDMA.Thereby, last defect management information record when dish withdraws from of use mid-game.As disabled another situation of the 2nd TDMA, have only dish use in defect management information be recorded among the TDMA, and after moving back dish, nearest defect management information also is recorded among the TDMA.In arbitrary situation, write down the failure of last defect management and when the use of recovery dish, discerned based on the value of refresh counter.Similarly, the successful record of defect management information also can obtain identification and confirm recently.
In addition, the locator information of last defect management can use one or two pointer (promptly respectively according to first and second embodiment) to visit current TDDS information among arbitrary TDMA.On the other hand, the locator information that is recorded in the last TDDS among the TDMA1 is the value of being set to " 0h " when not having branch to be used in the spare area of defect management, thereby and the full defect management that continues of TDMA2 become can not the time locator information value of being made as " Fh ".
It will be readily apparent to one skilled in the art that and to do various changes and variation in the present invention and do not deviate from the spirit or scope of the present invention.Thereby the present invention is intended to comprise these changes and variation, as long as they are all within the scope of claims and equivalents thereof.
Claims (20)
1. the method that the management information of optical record medium with at least one temporary defect management area territory is write down comprises the steps:
Upgrade defect management information;
In described temporary defect management area territory, write down the defect management information that is upgraded; And
When described recording medium is withdrawed from, the locator information of the defect management information of the defect management information of record recent renewal and sensing recent renewal in described temporary defect management area territory.
2. the method for claim 1 is characterized in that, described locator information is used as the part of temporary disk (T-disk) definition structure information and carries out record.
3. method as claimed in claim 2 is characterized in that described method also comprises the steps:
Upgrade in described temporary defect management area territory and write down described temporary disk (T-disk) definition structure information, wherein, described temporary disk (T-disk) definition structure comprises Counter Value, is used to indicate the renewal operand of described temporary disk (T-disk) definition structure.
4. method as claimed in claim 2, it is characterized in that, the temporary defect management information of the described renewal of writing down during recording operation is recorded in the first temporary defect management area territory, and the temporary defect of the recent renewal of record then is recorded in the second temporary defect management area territory when described recording medium is withdrawed from.
5. method as claimed in claim 4 is characterized in that described method also comprises the steps:
Carry out defect management, wherein, if be recorded in the highest Counter Value in the described second temporary defect management area territory, then after described dish definition structure information being recorded in the described second temporary defect management area territory, carry out described defect management immediately less than the highest Counter Value that is recorded in the described first temporary defect management area territory.
6. method as claimed in claim 4 is characterized in that described method also comprises the steps:
Carry out defect management, wherein, if be recorded in the highest Counter Value in the described second temporary defect management area territory less than the highest Counter Value that is recorded in the described first temporary defect management area territory, then before described dish definition structure information is recorded in the described second temporary defect management area territory, carry out described defect management immediately.
7. device that the management information of optical record medium with at least one temporary defect management area territory is write down, described device is configured to:
At described recording medium identifying recording layer;
Upgrade defect management information and be recorded in the defect management information that is upgraded that writes down in the described temporary defect management area territory; And
When described recording medium is withdrawed from, the locator information of the defect management information of the defect management information of record recent renewal and sensing recent renewal in described temporary defect management area territory.
8. device as claimed in claim 7 is characterized in that, described device is configured to described locator information is carried out record as the part of temporary disk (T-disk) definition structure information.
9. device as claimed in claim 8, it is characterized in that, described device is configured to upgrade described temporary disk (T-disk) definition structure information and the temporary disk (T-disk) definition structure of the described renewal of record in described temporary defect management area territory, wherein, described temporary disk (T-disk) definition structure comprises refresh counter, is used to indicate the renewal operand of described temporary disk (T-disk) definition structure.
10. device as claimed in claim 8, it is characterized in that, the temporary defect management information of the described renewal that described device writes down during being configured to be recorded in recording operation in the first temporary defect management area territory, and the temporary defect of the recent renewal that record writes down when described recording medium is withdrawed from the second temporary defect management area territory.
11. device as claimed in claim 10, it is characterized in that, if be recorded in the highest Counter Value in the described second temporary defect management area territory less than the highest Counter Value that is recorded in the described first temporary defect management area territory, then described device is configured to carry out immediately defect management after described dish definition structure information being recorded in the described second temporary defect management area territory.
12. device as claimed in claim 10, it is characterized in that, if be recorded in the highest Counter Value in the described second temporary defect management area territory less than the highest Counter Value that is recorded in the described first temporary defect management area territory, then described device is configured to carry out defect management immediately before described dish definition structure information is recorded in the described second temporary defect management area territory.
13. one kind is used for method that the data that are recorded in the recording medium with at least one temporary defect management area territory are reproduced, described method comprises:
Reproduction is recorded in the locator information in the described temporary defect management area territory, and described locator information is pointed to last defect management information; With
Reproduce described last defect management information from described at least one temporary defect management area territory,
Wherein, described last defect management information is by the defect management information of recent renewal before withdrawing from described recording medium.
14. method as claimed in claim 13 is characterized in that, described locator information is used as the part of temporary disk (T-disk) definition structure information and carries out record.
15. method as claimed in claim 14 is characterized in that, described temporary disk (T-disk) definition structure information comprises Counter Value, is used to indicate the renewal operand of described temporary disk (T-disk) definition structure.
16. method as claimed in claim 15, it is characterized in that, described at least one temporary defect management area territory comprises and being used in first temporary defect management area territory of carrying out defect management during the recording operation and the second temporary defect management area territory that is used for carrying out defect management when described recording medium is withdrawed from
Wherein, described last defect management information reproduces from the described second temporary defect management area territory.
17. one kind is used for device that the data that are recorded in the recording medium with at least one temporary defect management area territory are reproduced, described device is configured to:
Reproduction is recorded in the locator information in the described temporary defect management area territory, and described locator information is pointed to last defect management information; With
Reproduce described last defect management information from described at least one temporary defect management area territory,
Wherein, described last defect management information is by the defect management information of recent renewal before withdrawing from described recording medium.
18. device as claimed in claim 17 is characterized in that, described device is configured to reproduce the temporary disk (T-disk) definition structure information, thereby reproduction is used as the locator information that the part of temporary disk (T-disk) definition structure information writes down.
19. device as claimed in claim 18 is characterized in that, described temporary disk (T-disk) definition structure information comprises Counter Value, is used to indicate the renewal operand of described temporary disk (T-disk) definition structure.
20. device as claimed in claim 19, it is characterized in that, described at least one temporary defect management area territory comprises and being used in first temporary defect management area territory of carrying out defect management during the recording operation and the second temporary defect management area territory that is used for carrying out defect management when described recording medium is withdrawed from
Wherein, described device is configured to reproduce described last defect management information from the described second temporary defect management area territory.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030011831 | 2003-02-25 | ||
| KR20030011831 | 2003-02-25 | ||
| KR10-2003-0011831 | 2003-02-25 | ||
| KR10-2003-0023839 | 2003-04-15 | ||
| KR20030023839 | 2003-04-15 | ||
| KR1020030023839 | 2003-04-15 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800087480A Division CN100383862C (en) | 2003-02-25 | 2004-02-25 | Defect management method for optical recording medium and optical recording medium using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101241743A true CN101241743A (en) | 2008-08-13 |
| CN101241743B CN101241743B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810083182 Expired - Fee Related CN101241743B (en) | 2003-02-25 | 2004-02-25 | Defect management method and device for optical recording medium |
| CNB2004800087480A Expired - Fee Related CN100383862C (en) | 2003-02-25 | 2004-02-25 | Defect management method for optical recording medium and optical recording medium using the same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800087480A Expired - Fee Related CN100383862C (en) | 2003-02-25 | 2004-02-25 | Defect management method for optical recording medium and optical recording medium using the same |
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| CN (2) | CN101241743B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100572952B1 (en) * | 1997-08-12 | 2006-04-24 | 소니 가부시끼 가이샤 | Signal recording and reproducing device and method for managing defect of signal recording area |
| JP2000057713A (en) * | 1998-08-05 | 2000-02-25 | Mitsubishi Electric Corp | Method for managing defect of optical disk and optical disk device and optical disk |
| US6189118B1 (en) * | 1998-10-22 | 2001-02-13 | Matsushita Electric Industrial Co., Ltd. | Information recording medium, and method and apparatus for managing defect thereof |
| US6160778A (en) * | 1999-03-08 | 2000-12-12 | Matsushita Electric Industrial Co., Ltd. | Information recording medium, information recording method, information recording apparatus and information reproducing apparatus |
| JP4395998B2 (en) * | 2000-06-07 | 2010-01-13 | ソニー株式会社 | Optical disc apparatus, optical disc recording method, and optical disc |
| JP4407063B2 (en) * | 2001-02-19 | 2010-02-03 | パナソニック株式会社 | Defect management information playback device |
-
2004
- 2004-02-25 CN CN 200810083182 patent/CN101241743B/en not_active Expired - Fee Related
- 2004-02-25 CN CNB2004800087480A patent/CN100383862C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1768378A (en) | 2006-05-03 |
| CN100383862C (en) | 2008-04-23 |
| CN101241743B (en) | 2012-12-12 |
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