Source: http://www.google.com/patents/US8009534?dq=7245279
Timestamp: 2014-11-28 04:22:14
Document Index: 796473373

Matched Legal Cases: ['Application No. 2000', 'Application No. 2003', 'Application No. 2004', 'Application No. 2000', 'Application No. 10', 'Application No. 3', 'Application No. 2000']

Patent US8009534 - Method of recording data in multilayered recordable optical recording medium ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA method of recording data in a multilayered recordable optical recording medium is disclosed. When test recording is executed in a multilayered recordable optical recording medium having N recording layers (N is an integer of 2 or more), a test recording range in a test recording area of an (m+1)th...http://www.google.com/patents/US8009534?utm_source=gb-gplus-sharePatent US8009534 - Method of recording data in multilayered recordable optical recording medium, recording and reproducing apparatus for recording the data in the recording medium and the recording mediumAdvanced Patent SearchPublication numberUS8009534 B2Publication typeGrantApplication numberUS 12/209,865Publication dateAug 30, 2011Filing dateSep 12, 2008Priority dateSep 14, 2007Also published asEP2037456A1, US20090073844Publication number12209865, 209865, US 8009534 B2, US 8009534B2, US-B2-8009534, US8009534 B2, US8009534B2InventorsNoboru SasaOriginal AssigneeRicoh Company, Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (36), Referenced by (6), Classifications (8), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMethod of recording data in multilayered recordable optical recording medium, recording and reproducing apparatus for recording the data in the recording medium and the recording mediumUS 8009534 B2Abstract A method of recording data in a multilayered recordable optical recording medium is disclosed. When test recording is executed in a multilayered recordable optical recording medium having N recording layers (N is an integer of 2 or more), a test recording range in a test recording area of an (m+1)th recording layer is shifted relative to a test recording range in a test recording area of an mth recording layer by an amount greater than a difference of decentration amounts between the mth and the (m+1)th recording layers or a maximum decentration amount in the N recording layers. The shifting direction is inverse to a test recording range adding direction in a radius direction of the recording medium.
when a maximum decentration amount in the N recording layers of the recording medium is defined as �w�, the predetermined shifting distance is greater than the �w�.
a decentration information detecting step which detects the maximum decentration amount �w� by obtaining push-pull signals of all the recording layers before executing the test recording.
information of the decentration amounts has been recorded in an arbitrary recording layer, or in a BCA of the recording medium beforehand. Description
For example, in a case where the width of each zone is determined as shown in FIG. 30, when information is recorded in a zone B1 of the first recording layer and a laser beam �in� is irradiated at an inner circumferential end of the zone B1 and a laser beam �out� is irradiated at an outer circumferential end of the zone B1, the zones of the second recording layer on which zones the recorded statuses are to be managed can be limited to three zones A2, B2, and C2.
Patent Document 2 discloses an information recording method in an optical information recording medium. The medium provides two or more information recording layers, and a recording power test area for checking recording power is provided at an area other than an information recording area (user data recording area). When the number of the information recording layers is �n�, the number of the recording power test areas is �n−1� or more, and one recording power test area is allocated to each information recording layer. Then information is recorded in an optical information recording medium by a laser beam by determining whether the medium has one of three statuses of a lowest transmission rate of the laser beam, a highest transmission rate of the laser beam, and both of the transmission rates of the laser beam. That is, the power test is applied to the above three statuses, the recording power is determined, and information is recorded in the information recording area based on the determined recording power.
Each of the first through Nth recording layers provides a test recording area for executing test recording and an information recording area for recording user data. The test recording area of a Kth recording layer (K is an integer satisfying �1≦K≦N−1�) is arranged at a position different from positions of the test recording area and the information recording area of the (K+1)th through the Nth recording layers in the radius direction of the recording medium.
[Patent Document 1] Japanese Laid-Open Patent Application No. 2000-293947 [Patent Document 2] Japanese Laid-Open Patent Application No. 2003-22532 [Patent Document 3] Japanese Laid-Open Patent Application No. 2004-171740 [Patent Document 4] Japanese Laid-Open Patent Application No. 2000-285469 [Patent Document 5] Japanese Laid-Open Patent Application No. 10-269575 [Patent Document 6] Japanese Laid-Open Patent Application No. 3-157816 [Patent Document 7] Japanese Laid-Open Patent Application No. 2000-36130 SUMMARY OF THE INVENTION In a preferred embodiment of the present invention, there is provided a method of recording data in a multilayered recordable optical recording medium, a recording and reproducing apparatus for recording the data in the recording medium, and the recording medium in which suitable recording conditions can be effectively obtained and recording capacity can be effectively utilized in the recording medium.
EFFECT OF THE INVENTION According to an embodiment of the present invention, when test recording is executed in a multilayered recordable optical recording medium having N recording layers (N is an integer of 2 or more), a test recording range in a test recording area of an (m+1)th recording layer is shifted relative to a test recording range in a test recording area of an mth recording layer by an amount greater than a difference of decentration amounts between the mth and the (m+1)th recording layers or a maximum decentration amount in the N recording layers. The shifting direction is inverse to a test recording range adding direction in a radius direction of the recording medium. Therefore, suitable recording conditions can be effectively obtained and recording capacity can be effectively utilized in the recording medium.
First Embodiment FIG. 1 is a block diagram showing a recording and reproducing apparatus according to a first embodiment of the present invention.
When the maximum difference of the decentration amounts between a recording layer having the maximum decentration amount and a recording layer having the minimum decentration amount is defined as �w0�, the outer circumferential side end of the test recording range of the (m+1)th recording layer is shifted in the inner circumferential direction relative to the outer circumferential side end of the test recording range of the mth recording layer by an amount more than �w0�.
The shifting amount of the test recording range can be determined by the difference of the decentration amounts between the mth recording layer and the (m+1)th recording layer. However, it is preferable that the shifting amount of the test recording range be fixed to be a value greater than the maximum decentration amount �w� among the recording layers due to easiness of the determination.
In FIG. 7, when the shifting amount of the test recording range is determined by the maximum decentration amount �w�, the test recording ranges can be determined by straight lines α1 through α3.
At this time, as described above, the test recording range of the (m+1)th recording layer is shifted in the inner circumferential direction relative to the test recording range of the mth recording layer based on the maximum decentration amount �w�.
As shown in FIG. 9, the outer circumferential side end of the first test recording range of the second recording layer is largely shifted in the inner circumferential direction relative to the outer circumferential side end of the first test recording range of the first recording layer. That is, when the maximum decentration amount is defined as �w�, the outer circumferential side end of the first test recording range of the second recording layer is shifted by an amount greater than �w� in the inner circumferential direction relative to the outer circumferential side end of the first test recording range of the first recording layer. Therefore, in the second test recording, the second recording layer can be in the unrecorded status in the second test recording range of the first recording layer. That is, as shown in FIG. 9, a decentration margin can exist.
In FIG. 16, first, a multilayered recordable optical recording medium 100 is attached to a recording and reproducing apparatus (S1). Next, identification information of the multilayered recordable optical recording medium 100 is detected (S2). Then the information of the decentration amounts of the recording layers of the multilayered recordable optical recording medium 100 is detected (S3). In S3, instead of detecting the information of the decentration amounts of the recording layers, the maximum decentration amount �w� can be detected. Next, control such as servo control is optimized (S4).
Second Embodiment FIG. 17 is a block diagram showing a recording and reproducing apparatus according to a second embodiment of the present invention. In the second embodiment of the present invention, when an element is similar to or the same as that in the first embodiment of the present invention, the same reference number as that in the first embodiment of the present invention is used for the element, and the same description as that in the first embodiment of the present invention is omitted.
FIG. 22 is a diagram showing a remaining error amount of a push-pull signal. In FIG. 22, (a) shows a case where the decentration amount is almost nil, (b) shows a case where the decentration amount slightly exists, and (c) shows a case where the decentration amount largely exists. In FIG. 22, �re� shows the remaining amount of the push-pull signal.
When the maximum decentration amount is defined as �w�, the outer circumferential side end of the test recording range of the (m+1)th recording layer is shifted in the inner circumferential direction relative to the outer circumferential side end of the test recording range of the mth recording layer by an amount more than �w�.
The shifting amount of the test recording range can be determined by the difference of the decentration amounts between the mth recording layer and the (m+1)th recording layer. However, in order to easily determine the shifting amount, it is preferable that the shifting amount between the test recording ranges between the mth recording layer and the (m+1)th recording layer be fixed to be an amount more than the maximum decentration amount �w�.
Next, an mth recording layer is detected (S24). In S24, the initial value of �m� is 1. Then a decentration amount of the mth recording layer is detected by using a push-pull signal (S25). Next, it is determined whether m<N (S26). In S26, N is an integer indicating the number of recording layers of the multilayered recordable optical recording medium 100. When m<N (YES in S26); that is, the push-pull signals of all the recording layers are not detected, m is incremented (m=m+1) (S27). That is, in S24, an (m+1)th layer next to the mth layer is detected.
Third Embodiment FIG. 24 is a schematic diagram showing a first case of test recording according to a third embodiment of the present invention.
Fourth Embodiment FIG. 26 is a schematic diagram showing test recording according to a fourth embodiment of the present invention.
In the embodiments of the present invention, the test recording ranges are allocated to the recording layers from the center side of the recording medium, and the sizes of the first test recording ranges of the first through fifth recording layers are gradually changed. In this case, the sizes can be gradually increased or decreased by a predetermined amount. The predetermined amount is slightly larger than the maximum decentration amount �w� which is generated in manufacturing the recording medium. The slightly larger amount indicates the size of approximately one track in the recording medium. When the predetermined amount is determined to be the maximum decentration amount �w�, in a worst case, there is a risk that a test recording range of a recording layer at this time overlaps another test recording range of another recording layer in front of the recording layer at the previous time.
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ASSIGNOR(S) HEREBY CONFIRMS THE ENTIRE RIGHT, TITLE, AND INTEREST;ASSIGNOR:SASA, NOBORU;REEL/FRAME:022217/0486Nov 24, 2008ASAssignmentOwner name: RICOH COMPANY, LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SASU, NOBORU;REEL/FRAME:021883/0459Effective date: 20080924RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google