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1. 发明专利

JP2002117627A DATA RECORDER AND METHOD FOR RECORDING DATA ! MAGNETIC DISK UNIT 失效
公开(公告)号：JP2002117627A
公开(公告)日：2002-04-19
申请号：JP2000306573
申请日：2000-10-05
申请人： SONY CORP
发明人： HORIBATA YOSHIHIRO , MITSUNE NORICHIKA , KUMAI SATOSHI , KAWAMURA TETSUSHI , OEDA TAKASHI , HIROSE TSUNEO , KUBO MITSURU , KARASAWA NORIYUKI , TAKADA YUKITO
IPC分类号： G11B20/12 , G11B7/0045 , G11B7/007 , G11B7/09 , G11B20/10 , G11B20/14 , G11B20/18
摘要： PROBLEM TO BE SOLVED: To avoid nonconformities where a tracking servo deviates in a prescribed block area, when an optical disk is played back by a ROM drive or the like in the case that shift processing is applied to the prescribed block area of the optical disk, by preventing the prescribed block area from turning into an unrecorded portion. SOLUTION: When a normal write clock is no longer generated correctly during writing data in a block area A, writing of data is stopped (Fig. 11 (a)) and shift processing is applied to this block area. Then, data are written in the block area A by using a reference clock based on a signalling frequency from a quartz oscillator. Data are recorded so as to span the next block area A+1 (Fig. 11 (b)), thereby the area following the block area A is prevented from constituting the unrecorded portion caused by the irregular rotation of the optical disk or the like. Data are recorded on the block area A+1 (Fig. 11 (c)) by using a usual write clock. The shift processing is applied also to the block area A+1.

2. 发明专利

JPH11134671A REPRODUCING DEVICE AND METHOD THEREOF 失效
公开(公告)号：JPH11134671A
公开(公告)日：1999-05-21
申请号：JP29569997
申请日：1997-10-28
申请人： SONY CORP
发明人： KAWASHIMA TETSUJI , KUMAI SATOSHI
IPC分类号： G11B20/10 , G11B7/00 , G11B7/005 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To prevent effect from write-on area in evaluating a reproducing system based on a reproducing signal and adjusting the bias of a focusing error signal, etc. SOLUTION: A clock PLCK from a PLL is supplied to a gate circuit 21 and an absolute value signal PDO of a phase error is generated from the circuit 21. A reproducing signal EFM and the output of a D flit-flop are supplied to an exclusive NOR gate 23 and a signal EXO corresponding to the phase error is generated. By utilizing a stipulated format of the write-on area, a SR flip-flop 33 generates a signal LG while being a high level in the write-on area. In a period in which the signal LG is a high level, the output of a NAND gate 24 always becomes a high level and the gate circuit 21 is disabled. Thus, the output of the absolute value signal of phase error is masked. Consequently, control of bias adjustment of a focusing error signal based on the phase error in the write-on area is prohibited.

3. 发明专利

JPH0470380A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH0470380A
公开(公告)日：1992-03-05
申请号：JP17422090
申请日：1990-06-30
申请人： SONY CORP
发明人： KUMAI SATOSHI , NARAHARA TATSUYA , OSUE TADASHI
IPC分类号： B41M5/26 , G11B7/24 , G11B7/244
摘要： PURPOSE:To moderate the accuracy of film thickness required for a recording layer and thereby make possible an easy manufacture in addition to the elimination of a deteriorated regeneration signal due to variations of a reflection factor, the ability to regenerate recorded data stably and the reduced influence of an uneven coat application on a substrate and a recording layer. CONSTITUTION:If the film thickness of a recording layer is set to a film thickness value D which is adequate and free from the dependency of a recording layer on the film thickness and the film thickness of the recording layer E remaining at the bottom of a pit is E > A, in the recording layer containing a cyanine color as an optically absorptive color, the reflection factors of both the surface of the recording layer and the bottom of the pit will always be at the same value. Subsequently, the regeneration signal is prevented from becoming deteriorated due to variations of the reflection factor by setting the film thickness of the recording layer to the mentioned D. However, detecting the pit is performed in the phase difference mode based on light path differences between the pit part and the unrecorded part, since the reflection factor of the recording layer surface is equal to that of the pit bottom.

4. 发明专利

JPH02101644A ROTARY SCANNING TYPE OPTICAL HEAD DEVICE 失效
公开(公告)号：JPH02101644A
公开(公告)日：1990-04-13
申请号：JP25391188
申请日：1988-10-11
申请人： SONY CORP
发明人： NAKAO TAKASHI , KUMAI SATOSHI
IPC分类号： G11B7/135
摘要： PURPOSE:To attain power saving and the miniaturization of an optical head device by arranging a movable part required for focusing control and tracking control, etc., in the neighborhood of the center axis of the rotation of a rotary drum. CONSTITUTION:The focusing control can be attained by performing the moving control of a collimation lens L1 in a direction of (b) by a driving circuit 20 based on a signal supplied from a focusing servo circuit, and the tracking control can be attained by performing the conversion of the angle of a polarizing beam splitter BS in a direction of (c) by a driving circuit 21 based on the signal supplied from a tracking servo circuit. At this time, since the conversion of the positions or the angles of the collimation lens L1 and the polarizing beam splitter BS are performed almost in the center axis a-a' of the rotation, it is enough to prepare driving devices provided ordinary driving forces as the driving devices 20 and 21.

5. 发明专利

JPS6412505A MAGNETIC FIELD GENERATING DEVICE 失效
公开(公告)号：JPS6412505A
公开(公告)日：1989-01-17
申请号：JP16921987
申请日：1987-07-07
申请人： SONY CORP
发明人： HORIGOME HIDEYOSHI , KUMAI SATOSHI , WATANABE SATORU
IPC分类号： H01F5/00 , G11B5/02
摘要： PURPOSE:To reduce power consumption by effectively dispersing generated heat by a method wherein a recess is provided in the center part of one surface of a flat core material, and a winding having an aperture, with which magnetic flux is concentrated, is attached opposing to the recess on the surface of the core material. CONSTITUTION:A recess 4, having almost semispherical shaped disc-like core material 2 consisting of ferrite and the like, and a guide groove 7, to be used to pick out to outside the inner lead wire 6 of a winding 3 which will be attached to a part of the circumference of the recess 4 toward the core material 2, are provided. Then, the winding 3 having a center aperture 5 is attached to the surface where the recess 4 of the core material 2 is provided. At this time, the center axis of the aperture 5 and the recess 4 is matched, and the lead wire 6 is led out to outside through the guide groove 7. Thus, a flat wind ing is provided on the flat core material, the generated heat is effectively dissi pated, the intensity of magnetic field is increased, and reliable overwrite opera tion can be accomplished.

6. 发明专利

JP2002100044A OPTICAL RECORDING DEVICE AND LASER POWER CONTROL METHOD THEREOF 失效
公开(公告)号：JP2002100044A
公开(公告)日：2002-04-05
申请号：JP2000290917
申请日：2000-09-25
申请人： SONY CORP
发明人： NAGASHIMA KENJI , KUMAGAI EIJI , KUMAI SATOSHI , MORIZUMI TOSHIO
IPC分类号： G11B7/0045 , G11B7/125 , G11B7/126
摘要： PROBLEM TO BE SOLVED: To make stably controllable the write power during recording even in a pulse-train recording. SOLUTION: After writing starts, S/H 204 samples the output signal WRF' of an LPF 203 at specific time intervals corresponding to a specific pulse width part of recording data RD to find the pit level LVP. The signal WRF' has a variation part, corresponding to the multi-pulse train of a write RF signal WRF, smoothed. A controller 124 corrects the level of a target level signal STA supplied to an APC circuit 202 so that the pit level LVP becomes equal to an optimum pit level LVPr found before the writing. The pit level LVP is obtained after the variation part of the write RF signal WRF is smoothed by the LPF 203, so the pit level LVP can stably be obtained without being affected by the multi-pulse train and the write power can stably be controlled.

7. 发明专利

JP2001297465A INFORMATION RECORDER 失效
公开(公告)号：JP2001297465A
公开(公告)日：2001-10-26
申请号：JP2000118511
申请日：2000-04-14
申请人： SONY CORP
发明人： MORIZUMI TOSHIO , KUMAI SATOSHI
IPC分类号： G11B7/0045 , G11B7/125
摘要： PROBLEM TO BE SOLVED: To always write information to a recording medium in an optimal state even in the case that the ambient temperature of a laser beam source is changed. SOLUTION: The wavelength of a recording laser beam exited from the laser beam source 11 is detected by a wavelength detecting mechanism 20. The operation of a laser driving part 30 which drives the laser beam source 11 is controlled by a controller 33 in accordance with the wavelength of the recording laser beam detected by the wavelength detecting mechanism 20.

8. 发明专利

JP2000195079A OPTICAL DISK-DRIVING APPARATUS AND SKEW SERVO METHOD 失效
公开(公告)号：JP2000195079A
公开(公告)日：2000-07-14
申请号：JP37063998
申请日：1998-12-25
申请人： SONY CORP
发明人： KUMAI SATOSHI , MUNEKATA KAZUMI
IPC分类号： G11B7/095
摘要： PROBLEM TO BE SOLVED: To surely effectuate skew servo and drive to rotate an optical disk by detecting a skew for the reflectively change type optical disk and executing skew servo on the basis of the detected result of the skew. SOLUTION: A detect output of a two-split photosensor is supplied as a skew error signal by a skew error detect circuit comprising a subtractor, an adder and a divider to a skew servo circuit 11. Based on the signal, the skew servo circuit 11 generates a control voltage corresponding to a correction amount for correcting a relative tilt of an optical disk 1 and an optical pickup 2 and supplies the control voltage to a skew motor 10. The skew motor 10 drives on the basis of the control voltage from the skew servo circuit 11 to rotate a cam 8 for moving up and down one end of a supporting member 13 for the optical unit 4, thereby changing a tilt of the optical unit 4. The relative tilt of the optical disk 1 and optical pickup 2, namely, a skew is thus corrected.

9. 发明专利

JPH05250720A 失效
公开(公告)号：JPH05250720A
公开(公告)日：1993-09-28
申请号：JP5080892
申请日：1992-03-09
申请人： SONY CORP
发明人： OSUE TADASHI , KABAYA YOSHITERU , KUMAI SATOSHI , NARAHARA TATSUYA , NAKAO TAKASHI
IPC分类号： G11B7/00 , G11B7/003 , G11B7/135
摘要： PURPOSE:To obtain an optical recorder/reproducer having simplified constitution and additionally provided with verify function. CONSTITUTION:Laser beam from a laser light source is modulated based on a data to produce a light beam for recording/reproducing the data onto an optical tape. A multi-laser light source emitting four light beams is employed as the laser light source wherein two unit laser light sources are used for data and arbitrary number, two in the embodiment, of remaining unit laser light sources are used for verify. Tracks Ta(T1a, T2a), Tb(T2a, T2b) formed by light beams Ba, Bb from the unit laser light sources for data are scanned by verifying light beams Bc, Bd thus performing read after write operation.

10. 发明专利

JPS634439A COPYING EQUIPMENT FOR INFORMATION RECORDING MEDIUM 失效
公开(公告)号：JPS634439A
公开(公告)日：1988-01-09
申请号：JP14673186
申请日：1986-06-23
申请人： SONY CORP
发明人： WATANABE HIDETOSHI , KUMAI SATOSHI , SUZUKI KOJI , YAMAMOTO MASANOBU
IPC分类号： B29C39/10 , B29C39/22 , B29C43/18 , B29L17/00 , B29L31/34 , G11B7/26
摘要： PURPOSE:To copy high quality information recording media with high productivity by providing a large diameter part and a small diameter part to a shaft member entering a substrate opposite to a stamper, and providing a projecting part to part of the large diameter part. CONSTITUTION:In order to center the substrate 34 with respect to the stamper 33, the shaft member 22 inserted through the stamper 33 and the substrate 34, is provided and the shaft member 22 has the large diameter part 26 having a relatively larger diameter and the small diameter part 25 connected to the large diameter part 26 and having a relatively smaller diameter. Further, a projection 27 projected in a direction orthogonal to the shaft center of the shaft member 22 is formed in the vicinity of the boundary between the large diameter part 26 and the small diameter part 25, the small diameter part 25 is inserted through the stamper 23 and the large diameter part 26 are penetrated through the substrate 24 to apply alignment. While an end face 26a at the boundary of the large diameter part 26 with the small diameter 25 is contacted closed to the stamper 33, the end face 26a is opposed to the base and the projection 26 pushes the substrate 34 bonded because of the cured resin 12 to exfoliate the base 34 from the stamper 33.

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