WO2005008644A1 - 2層ディスク判別方法及び光ディスク装置 - Google Patents
2層ディスク判別方法及び光ディスク装置 Download PDFInfo
- Publication number
- WO2005008644A1 WO2005008644A1 PCT/JP2004/010332 JP2004010332W WO2005008644A1 WO 2005008644 A1 WO2005008644 A1 WO 2005008644A1 JP 2004010332 W JP2004010332 W JP 2004010332W WO 2005008644 A1 WO2005008644 A1 WO 2005008644A1
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- WIPO (PCT)
- Prior art keywords
- disc
- layer
- wavelength
- light
- reflectance
- Prior art date
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
- G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
- G11B19/127—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving detection of the number of sides, e.g. single or double, or layers, e.g. for multiple recording or reproducing layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Definitions
- Double-layer disc discriminating method and optical disc apparatus Double-layer disc discriminating method and optical disc apparatus
- the present invention relates to a two-layer disc discriminating method and an optical disc device.
- DVD discs that feature high-density recording by being added to the original CD discs (CD-ROM, CD-R, CD-RW, etc.) (DVD-ROM, DVD ⁇ R, DVD player RW, etc.) have also been actively developed and marketed, and furthermore, multi-layer discs to increase the storage capacity per disc, generally double-layer discs Various proposals have been made. In particular, the dual-layer DVD-ROM has already reached the sales stage.
- an optical disk device loaded with these various disks be of a convertible type capable of coping with these various disks by one.
- an optical disc device capable of processing a DVD-based optical disc it is required that a CD-based disc can be recorded or reproduced by using only a DVD-based disc.
- DVD-ROMs include a single-layer medium having only the first layer and a two-layer medium having two layers, the first layer and the second layer. Only the first layer of the single-layer medium is high. It can be determined because it is reflection (45%-60%), but the first layer and the second layer of a two-layer DVD-ROM are the same as DVD player R2 layer and DVD player RW medium, so it cannot be determined only by reflectance. So, just like a CD, you can see if there's a wobble, check the S-curve by tracking and confirm that it's a DVD, and then record it to determine if it's a DVD-R or DVD-RW! / Pakuto! ⁇ ⁇ The process is long and takes time.
- Patent Document 2 for example, a step of performing focus servo, a step of obtaining a tracking error signal of a push-pull method in which an optical disc car is also obtained, and comparing the amplitude of the tracking error signal with a predetermined value.
- a disc discriminating method including a step of discriminating the type of an optical disc, for example, any one of DVD-RAM, DVD-RW, and DVD + RW.
- a method of using the frequency of a wobble signal has been proposed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11 306650
- Patent Document 2 JP 2002-312933
- An object of the present invention is to provide a dual-layer disc type (write-once dual-layer disc, rewritable double-layer disc,
- the purpose is to make it easy and accurate to distinguish between ROM-type double-layer discs.
- the ROM type dual-layer disc is used. Wavelength light is distinguished as a write-once dual-layer disc when the reflectance is 4% or more and less than 15%, and as rewritable double-layer disc when both wavelengths have a reflectance of 4% or more and less than 15%.
- the disc is determined to be a non-standard disc. .
- the dual-layer disc discriminating method according to any one of 1) to 5), further comprising a step of judging whether the disc is a CD disc or a DVD disc.
- An optical pickup that has two light sources with different wavelengths and selectively irradiates the loaded disc with light of each wavelength, and whether the loaded disc is a two-layer disc in the disc type discrimination mode.
- a recording layer number discriminating means for discriminating whether or not the disc is loaded, and when the loaded disc is a two-layer disc, each layer of the two-layer disc is irradiated with light having a different wavelength by the optical pickup in a focused state.
- the two-layer disc is a write-once dual-layer disc, a rewritable two-layer disc,
- An optical disc device comprising: a double-layer disc discriminating means for judging which of a ROM type double-layer disc is the disc.
- the two-layer disc discriminating means is a ROM-type two-layer disc when the combination of the obtained reflectances of the respective wavelength lights is 15% or more for both the two-wavelength lights.
- the two-layer disc discriminating means discriminates the disc as a nonstandard disc if the determined combination of the reflectance of each wavelength light is less than 4% for both wavelength lights. 9)
- the optical disk device according to the above.
- the first aspect of the present invention it is possible to easily and accurately determine the type of the two-layer disc by utilizing the difference in the combination of the reflectances when light of different wavelengths is irradiated.
- the second aspect of the present invention it is possible to easily determine the type of the double-layer disc by using two light sources mounted on a so-called DVD-type and CD-type convertible optical disc device.
- the range of the difference in the combination of the reflectances of the two-layer disc becomes clear.
- a nonstandard disc it is possible to appropriately determine a nonstandard disc.
- a double-layer disc can be appropriately selected.
- a DVD-based two-layer disc can be appropriately selected.
- the functions and effects of the present invention 14 can be similarly exerted by the optical disk device of the present invention 7-10.
- FIG. 1 is a block diagram mainly showing a signal processing system of an optical disc device according to an embodiment of the present invention.
- FIG. 2 is a schematic flowchart showing an example of a disk type determination process.
- FIG. 3 is a schematic flowchart showing a continuation of an example of a disk type determination process.
- the optical disc device of the present embodiment shows an example of application to a CDZDVD convertible optical disc device 1, and FIG. 1 is a block diagram mainly showing a signal processing system of the optical disc device.
- the present embodiment has a built-in chip of a semiconductor laser (light source) 2 for emitting a laser beam having a wavelength of 780 nm for a CD system and a semiconductor laser (light source) 3 for emitting a laser beam of a wavelength of 660 nm for a DVD system.
- a semiconductor laser (light source) 2 for emitting a laser beam having a wavelength of 780 nm for a CD system
- a semiconductor laser (light source) 3 for emitting a laser beam of a wavelength of 660 nm for a DVD system.
- the optical disk 6 includes a CD-ROM, a CD-R, a CD-RW, a DVD-ROM, a DVD ⁇ R, a DVD player RW, a DVD—double-layer ROM (ROM-type double-layer disk), and a DVD ⁇ 2.
- the optical disk 6 is rotationally driven by a spindle motor 26 constituting a main part of a rotational drive mechanism.
- the spindle motor 26 is controlled by the motor driver 7 and the servo means 8 so that, for example, the linear velocity becomes constant.
- This linear velocity can be changed step by step.
- the optical pickup device 5 has built-in light receiving elements and position sensors in addition to corresponding optical systems such as semiconductor lasers 2 and 3, an objective lens (not shown), a tracking Z focus actuator (not shown), and the like.
- the optical disk 6 is irradiated with laser light from the semiconductor laser 2 or 3 which is driven alternatively. Also this The optical pickup device 5 can be moved in the sledge direction by a seek motor (not shown).
- These tracking Z focus actuators and seek motors generate laser light spots on the optical disc 6 by the motor driver 7 and the servo means 8 based on signals obtained from the light receiving element and the position sensor force. Controlled to be located in place.
- the reproduced signal strength obtained by the optical pickup device 5 is amplified by the reproduced signal processing circuit 11, binarized, and input to the CDZDVD decoder 12.
- the input binary data is demodulated in the CDZDVD decoder 12 by EFM (Eight to Fourteen Modulation, 8-14 modulation).
- EFM Eight to Fourteen Modulation, 8-14 modulation
- the recording data is grouped into 8 bits and subjected to EFM modulation.
- 8 bits are converted into 14 bits, and 3 combined bits are added to make a total of 17 bits.
- the combined bit is added so that the number of "1" and "0" is equal on average.This is called "DC component suppression"! Of the slice level is suppressed.
- the demodulated data is subjected to a process of interleaving and error correction. Thereafter, this data is input to the CDZDVD-ROM decoder 13, and further error correction processing is performed to improve the reliability of the data.
- the data on which the error correction processing has been performed twice in this manner is stored in the buffer RAM 15 by the buffer manager 14, and is prepared as sector data in the host computer 3 ( ⁇ ) via the ATAPIZSCSI interface 16.
- the data output from the CDZDVD decoder 12 is input to the DZA converter 17, and is extracted as an analog audio output signal Audio (Audio) 40.
- the wobble signal includes absolute time information called ATIP. Extracted by P decoder 18.
- the synchronization signal generated by the ATIP decoder 18 is input to the CD encoder 19, and enables writing of data at an accurate position on the optical disk 6.
- the data in the buffer RAM 15 is interleaved with an error correction code in the CD-ROM encoder 20 and the CD encoder 19, and the laser controller 21 for the CD-RZRW and the semiconductor laser 2 in the optical pickup device 5 are read. Via the optical disk 6.
- the overall control of such an optical disk device is controlled by a CPU 24 including a ROM 22 and a RAM 23 and configured as a microcomputer.
- a CPU 24 including a ROM 22 and a RAM 23 and configured as a microcomputer.
- the DVD-type optical disk 6 is loaded, the DVD By causing the semiconductor laser 3 in the optical pickup device 5 to emit light by the laser controller 25, recording or reproducing operation on the optical disk 6 is executed. Therefore, the laser controllers 21 and 25 and the CPU 24 function as a light source driving means for selectively driving the semiconductor lasers 2 and 3 in the light source unit 4 according to the type of the optical disk 6.
- the present invention when the optical disk 6 is loaded in the optical disk device 1, a process of a disk type determination mode for determining the disk type is executed.
- the present invention is characterized by a method of determining the type when a two-layer disc (DVD-ROM, DVD ⁇ R, DVD player RW) is loaded as the optical disc 6.
- the light of the semiconductor laser 2 for the CD system which is not actually used, is used together with the light of the semiconductor laser 3 for recording or reproducing, and the reflectance at each wavelength light is used.
- the combined power of the reflectivity at each wavelength light is focused on the differences depending on the type of the two-layer disc, and the type of the two-layer disc is determined according to this combination.
- DVD + R (dye-based sample), DVD + RW (phase-change sample) and DVD-ROM (pit media) are prepared as this type of double-layer disc, and the 660 nm wave for DVD is prepared.
- the reflectivity when irradiating long light and the reflectivity when irradiating light with wavelength of 780 nm for CD were measured, the results shown in Table 1 were obtained as data examples (standard).
- DVD + R (dye-based sample), DVD + RW (phase change type sample) and DVD-ROM (pit media) were prepared as single-layer discs, and irradiated with 660 nm wavelength light for DVD.
- DVD-R and DVD-RW of DVD-R and DVD-RW have the same reflectance as DV D + R, and DVD-RW has the same reflectance as DVD + RW. Like + RW, it can be determined from a DVD-ROM or the like.
- DVD-R and D VD-RW have pits formed in the disc radius of 23.9mm to 24.Omm, so the reflectivity of each media in the disc radius is viewed with a low-pass filter of about 30KHz.
- DVD-R or DVD- RW which can be distinguished from DVD + R and DVD + RW.
- DVD-ROM or DVD-R with a reflectance of 45% or more, and DVD with a reflectance of 18% or more under 30% or less.
- Power that can be distinguished from RW For such a DVD single-layer disc, if the reflectance characteristics corresponding to the wavelength shown in Table 2 are used,
- the optical disk device 1 of the present embodiment under the control of the CPU 24, discriminates the disk type according to the schematic flowcharts shown in FIGS. Processing, especially the two-layer disc type discrimination processing.
- the disc type discrimination processing mode is programmed to execute the following discrimination processing.
- Step S1 It is constantly monitored whether a certain optical disk 6 is loaded (Step S1).
- the spindle motor 26 is driven to rotate the optical disk 6 (Step S1).
- S2 the process proceeds to execution of the disk type determination mode (S3).
- the semiconductor laser 3 for DVD which is one of the light sources, is driven to emit light (S4), and the focus position of the laser beam is moved at a constant speed in the focus direction via the servo means 8, the motor driver 7, the focus actuator, and the like. So-called focus sweep is performed (S5).
- the reflected light amount signal and the focus error signal obtained at the time of the focus sweep are taken in through the reproduction signal processing circuit 11 (S6), and the distance to the surface force recording surface of the optical disk 6 is calculated based on these signals.
- the CD disk is a CD-based disk at a distance (thickness) greater than or equal to a predetermined value (N in S7), thereafter, for example, the CD disk The type may be determined.
- step S8 is executed as a function of the number of recording layer determination means. Since this technique is well known, for example, in Patent Document 2, it will not be described in detail.
- the irradiation light of the semiconductor laser 3 is irradiated on the first recording layer (first layer) in a focused state.
- the reflected light is received by the light-receiving element, and the reflectance is obtained from the RF signal level obtained by processing by the reproduction signal processing circuit 11 (S9).
- the focus is drawn to the second recording layer (second layer). (S10), and the reflected light when the irradiation light of the semiconductor laser 3 is irradiated in focus on the second recording layer (second layer) is received by the light receiving element and processed by the reproduction signal processing circuit 11 to obtain.
- the obtained reflectance is stored in the RAM 23 or the like.
- the semiconductor laser 2 for CD having a wavelength of 780 nm is emitted (S12), and the first recording layer (first layer) is focused! (S13)
- An RF signal obtained by receiving the reflected light when the irradiation light of the semiconductor laser 2 is applied to the first recording layer (first layer) in a focused state by the light receiving element and processing by the reproduction signal processing circuit 11 The reflectivity is determined according to the level (S14), and the focus is drawn into the second recording layer (second layer) (S15), and the irradiation light of the semiconductor laser 2 is applied to the second recording layer (second layer).
- the reflected light when illuminated in a focused state is received by the light receiving element and processed by the reproduction signal processing circuit 11 to determine the reflectance based on the RF signal level obtained (S16).
- the obtained reflectances are also stored in the RAM 23 or the like.
- steps S9 to S16 is executed as a function of the reflectance calculating means.
- the type of the optical disc 6 is determined using the threshold.
- the two-wavelength light has a reflectance of 15% or more (Y in S17), it is determined to be a DVD-ROM (S18).
- DVD wavelength light has a reflectance of 15% or more and the CD wavelength light has a reflectance of 4% or more and less than 15% (N in S17, Y in S19), it is determined to be DVD + R (S20).
- the disc is determined to be a nonstandard disc (S23).
- Such a discrimination result of the two-layer disc is used for setting of a device for a subsequent recording or reproducing operation.
- the subsequent discrimination processing may be performed in the same manner as in the past, but FIG. It may be performed as shown in FIG.
- the reflectance is obtained from the RF signal level obtained by receiving the reflected light when the irradiation light of the semiconductor laser 3 irradiates the recording layer in a focused state with the light receiving element and processing it by the reproduction signal processing circuit 11 ( S31).
- the obtained reflectance is stored in the RAM 23 or the like.
- the semiconductor laser 2 having a wavelength of 780 nm for CD is emitted (S32), and the recording layer is focused (S33), and the irradiation light of the semiconductor laser 2 is applied to the recording layer.
- the reflectance is obtained from the RF signal level obtained by receiving the reflected light when irradiated in the in-focus state by the light receiving element and processing it by the reproduction signal processing circuit 11 (S34).
- the obtained reflectances are also stored in the RAM 23 or the like.
- the type of the optical disc 6 is determined by using the above-described threshold value in accordance with the combination of the obtained reflectances of the respective wavelength lights.
- the two wavelength light has a reflectance of 45% or more (Y in S35), it is determined to be a DVD-ROM (S36). If the DVD wavelength light has a reflectance of 45% or more and the CD wavelength light has a reflectance of 5% or more and less than 18% (N in S35, Y in S37), it is determined to be DVD + R (S38).
- DVD wavelength light has a reflectance of 18% or more and 30 or less and the CD wavelength light has a reflectance of 5% or more and less than 18% (N in S35, Y in S37, Y in S39), DVD + RW Is determined (S40).
- the disc is determined to be a nonstandard disc (S41).
- a first protective layer ZnSSiO, 70 nm thick
- a first information recording layer Al
- a first information recording structure was formed by providing a reflective layer (Ag, thickness 120 nm) on the upper surface so that heat could easily escape.
- a protective layer ZnSSiO
- recording layer (Ag In Ge Sb Te thickness 7nm)
- protective layer (ZnSSiO, thickness 18nm)
- ZrCO layer thickness 3nm
- reflective layer Al, thickness 10nm
- translucent layer ITO; In ⁇ and SnO
- a second recording layer construct was formed by sequentially providing a 23 mixture and a thickness of 100 nm.
- the first recording layer structure and the second recording layer structure are combined with a 55 ⁇ m-thick UV-curable resin (SD31).
- the two-layer disc was obtained by bonding using 8).
- the substrate of the first recording layer structure had a track pitch of 0.8 ⁇ ⁇
- the substrate of the second recording layer structure had a track pitch of 0.
- the reflectance of each layer is detected as 8% and 10%, and according to the schematic flowchart shown in Fig. 2, the reflectance of both wavelengths is 4% or more and less than 15%.
- a first dye layer (Cyanine) was formed on a first substrate made of polycarbonate by spin coating, and IZO (a mixture of In 2 O and ZnO) was formed thereon as a first translucent layer by sputtering.
- IZO was formed as a second translucent layer by sputtering, and then a second dye layer (cyanine) was formed by spin coating.
- a second dye layer (cyanine) was formed by spin coating.
- the first substrate on which the first dye layer and the like are formed and the second substrate on which the second dye layer and the like are formed are attached to each other with a UV curable resin (SD318) so that the dye layers face each other. Together, a two-layer disc was obtained.
- SD318 UV curable resin
- Both substrates 0.6 mm, first dye layer: 60 nm, first translucent layer: 80 nm, resin intermediate layer: 55 m, second dye layer: 70 nm, second semitransparent layer: 100 nm
- the track pitch of the first substrate was 0.74 m
- the track pitch of the second substrate was 0.80 ⁇ m.
- SiN was formed as a first inorganic layer by sputtering with a thickness of 10 ⁇ m, and on the other hand, as a second inorganic layer on a second polycarbonate substrate. After forming Al Ti by lOOnm thickness, the inorganic layers are
- the type of the two-layer disc is determined by utilizing the difference in the combination of the reflectances when irradiating light of different wavelengths.
- the type can be accurately determined.
- the present inventions 1 and 7 can be easily realized by using two light sources mounted on a so-called DVD type and CD type convertible optical disc device. .
- non-standard discs can be properly determined.
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- Optical Recording Or Reproduction (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04770842A EP1647975B1 (en) | 2003-07-23 | 2004-07-21 | Method for identifying type of two-layer disc and optical disc device |
DE602004026066T DE602004026066D1 (de) | 2003-07-23 | 2004-07-21 | Hichtigen datenträgers und optische datenträgereinrichtung |
US11/336,911 US7613091B2 (en) | 2003-07-23 | 2006-01-23 | Method for identifying double-layer disc and optical disc apparatus |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003200209 | 2003-07-23 | ||
JP2003-200209 | 2003-07-23 | ||
JP2004-066108 | 2004-03-09 | ||
JP2004066108A JP2005056543A (ja) | 2003-07-23 | 2004-03-09 | 2層ディスク判別方法及び光ディスク装置 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/336,911 Continuation US7613091B2 (en) | 2003-07-23 | 2006-01-23 | Method for identifying double-layer disc and optical disc apparatus |
Publications (1)
Publication Number | Publication Date |
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WO2005008644A1 true WO2005008644A1 (ja) | 2005-01-27 |
Family
ID=34082336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/010332 WO2005008644A1 (ja) | 2003-07-23 | 2004-07-21 | 2層ディスク判別方法及び光ディスク装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7613091B2 (ja) |
EP (1) | EP1647975B1 (ja) |
JP (1) | JP2005056543A (ja) |
DE (1) | DE602004026066D1 (ja) |
TW (1) | TWI264704B (ja) |
WO (1) | WO2005008644A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007311005A (ja) * | 2006-05-22 | 2007-11-29 | Matsushita Electric Ind Co Ltd | 光ディスク信号処理方法及び光ディスク信号再生方法並びに光ディスク信号処理装置及び光ディスク信号再生装置 |
JP4433325B2 (ja) * | 2007-12-03 | 2010-03-17 | ソニー株式会社 | 光情報記録媒体 |
US8503276B2 (en) * | 2009-12-30 | 2013-08-06 | Mediatek Inc. | Optical disk drive and method for determining type of a blu-ray disk |
US20110255839A1 (en) * | 2010-04-15 | 2011-10-20 | Kaleidescape, Inc. | Importing blu-ray disc content |
EP2720225A4 (en) * | 2011-06-10 | 2016-07-13 | Hitachi Consumer Electronics | DISC SHAPE RECORDING MEDIUM |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0789354A2 (en) | 1996-02-07 | 1997-08-13 | Kabushiki Kaisha Toshiba | Optical disk device |
JPH1166622A (ja) * | 1997-08-25 | 1999-03-09 | Taiyo Yuden Co Ltd | 光情報媒体とその記録再生方法 |
JPH11306650A (ja) * | 1998-04-15 | 1999-11-05 | Toshiba Corp | 光ディスク種別判別装置及び光ディスク種別判別方法 |
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US5748598A (en) * | 1995-12-22 | 1998-05-05 | Massachusetts Institute Of Technology | Apparatus and methods for reading multilayer storage media using short coherence length sources |
US5831952A (en) * | 1995-07-27 | 1998-11-03 | Matsushita Electric Industrial Co., Ltd. | Optical disk thickness discriminating apparatus |
JP2001023287A (ja) * | 1999-07-02 | 2001-01-26 | Alps Electric Co Ltd | ディスク装置 |
JP4085530B2 (ja) | 1999-08-05 | 2008-05-14 | ソニー株式会社 | 光学記録媒体、並びに信号記録装置及び信号記録方法 |
JP3926973B2 (ja) | 2000-08-28 | 2007-06-06 | 株式会社東芝 | 信号記録媒体及び記録再生方法及び記録再生装置 |
JP4067781B2 (ja) | 2001-04-13 | 2008-03-26 | 株式会社日立エルジーデータストレージ | ディスク再生装置 |
US7075873B2 (en) * | 2002-03-22 | 2006-07-11 | Ricoh Company, Ltd. | Optical disc apparatus with disc selecting function |
-
2004
- 2004-03-09 JP JP2004066108A patent/JP2005056543A/ja active Pending
- 2004-07-21 DE DE602004026066T patent/DE602004026066D1/de active Active
- 2004-07-21 WO PCT/JP2004/010332 patent/WO2005008644A1/ja active Application Filing
- 2004-07-21 EP EP04770842A patent/EP1647975B1/en not_active Not-in-force
- 2004-07-22 TW TW093121958A patent/TWI264704B/zh not_active IP Right Cessation
-
2006
- 2006-01-23 US US11/336,911 patent/US7613091B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0789354A2 (en) | 1996-02-07 | 1997-08-13 | Kabushiki Kaisha Toshiba | Optical disk device |
JPH1166622A (ja) * | 1997-08-25 | 1999-03-09 | Taiyo Yuden Co Ltd | 光情報媒体とその記録再生方法 |
JPH11306650A (ja) * | 1998-04-15 | 1999-11-05 | Toshiba Corp | 光ディスク種別判別装置及び光ディスク種別判別方法 |
Non-Patent Citations (3)
Title |
---|
NAGATA K. ET AL.: "Rewritable dual-layer phase-change optical disc", JPN. J. APPL. PHYS., vol. 38, no. 3B, March 1999 (1999-03-01), YOKYO, JAPAN, pages 1679 - 1686, XP000905979 * |
NISHIUCHI K. ET AL.: "Dual-lyer optical disk with Te-O-Pd phase-change film", J. APPL. PHYS., vol. 37, no. 4B, April 1998 (1998-04-01), JAPAN, YOKYO, pages 2163 - 2167, XP002983947 * |
See also references of EP1647975A4 |
Also Published As
Publication number | Publication date |
---|---|
US20060164943A1 (en) | 2006-07-27 |
TW200506821A (en) | 2005-02-16 |
US7613091B2 (en) | 2009-11-03 |
EP1647975A4 (en) | 2008-12-10 |
TWI264704B (en) | 2006-10-21 |
EP1647975B1 (en) | 2010-03-17 |
JP2005056543A (ja) | 2005-03-03 |
EP1647975A1 (en) | 2006-04-19 |
DE602004026066D1 (de) | 2010-04-29 |
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