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1. 发明专利

JPH08339624A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH08339624A
公开(公告)日：1996-12-24
申请号：JP14600695
申请日：1995-06-13
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAMURE HISANORI
IPC分类号： G11B19/28 , G11B19/247
摘要： PURPOSE: To obtain an optical disk device for improving access time while maintaining a required playability level. CONSTITUTION: A motor control part is provided with a first rotation mode for performing a stable servo and a second rotation mode for performing a speedy access as the rotation mode of a constant linear velocity for controlling the rotation of a disk motor 2. The waveform of a phase compensation constant, the output voltage to the disk motor 2, and the capacitance values of capacitors 17 and 18 for eliminating the ripple noise of the drive voltage of the disk motor 2 are switched according to each rotation mode.

2. 发明专利

JPH11328684A METHOD FOR DETERMINING KIND OF OPTICAL DISC AND OPTICAL DISC DEVICE 失效
公开(公告)号：JPH11328684A
公开(公告)日：1999-11-30
申请号：JP13640398
申请日：1998-05-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAMURE HISANORI
IPC分类号： G11B19/12 , G11B7/00 , G11B7/004 , G11B7/085 , G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide a method for determining the kind of an optical disc and an optical disc device in which the time required for determining the kind of optical disc can be reduced significantly. SOLUTION: The optical disc device comprises light source sections 7, 9 emitting a plurality of kinds of light being used for reading or writing depending on various kinds of optical disc 24, an objective lens 11 for condensing each laser light onto a recording face, an actuator 12 for advancing/retracting the objective lens 11 in the direction of the optical axis, light detecting sections 15, 18 for detecting each laser light reflected on the recording face of the optical disc 24, and a section 1 for measuring the reflected quantity of each laser light detected at the detecting sections 15, 18 and detecting a reflected light having the reflected quantity exceeding a specified level.

3. 发明专利

JPH10208259A OPTICAL DISK DRIVE DEVICE 失效
公开(公告)号：JPH10208259A
公开(公告)日：1998-08-07
申请号：JP1086597
申请日：1997-01-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUENAGA KIYOYUKI , TAKAMURE HISANORI
IPC分类号： G11B7/085 , G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical disk drive device capable of stably reading out the data. SOLUTION: A low frequency component of a tracking error signal extracted by a low-pass filter 11 is converted into the digital data by an A/D converter 18 to be monitored by a CPU 16. When a tracking servo is in an ON state, a command value is issued to an offset generation means 17, and an offset voltage is added to the low frequency component of the tracking error signal extracted by the low-pass filter 11. A servo control means 12 of a carriage movement controls the carriage 2 in the radial direction of the disk by using a carriage control signal adding the offset voltage generated from the offset generation means 17 to the low frequency component of the tracking error signal.

4. 发明专利

JPH076376A OPTICAL DISK DEVICE 失效
公开(公告)号：JPH076376A
公开(公告)日：1995-01-10
申请号：JP14509093
申请日：1993-06-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SUENAGA KIYOYUKI , GONDO HIROYUKI , SASAKI KATSUTOSHI , TAKAMURE HISANORI , MURAOKA KOJI
IPC分类号： G11B7/085 , G11B21/08
摘要： PURPOSE:To perform access control at a high speed by reducing a calculation error of the number of tracks to a target track, in seek operation of a disk device such as a CD. CONSTITUTION:Preliminary seek operation is performed before an actual operation mode, sector addresses and the number of tracks are previously made corresponding every DELTAt lines of track and stored in a memory 36. In the case of seek operation in an actual operation mode, the number of tracks from the present track to a track at which a target sector is positioned is obtained by operation compensating it by a moving track numbers calculating section 19 based on the previous memory information.

5. 发明专利

JPH04150758A VOICE COIL MOTOR 失效
公开(公告)号：JPH04150758A
公开(公告)日：1992-05-25
申请号：JP27110190
申请日：1990-10-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAMURE HISANORI
IPC分类号： H02K33/18
摘要： PURPOSE:To obtain high accuracy of positioning to a magnetic disc device main body by shaping a first outer yoke into U form having opposite projections of different lengths and joining a second outer yoke to the top face of the shorter projection and the tip of one side face of the longer projection of the first yoke. CONSTITUTION:A first outer yoke 1 is shaped into U form having a projection 1b and a projection 1a longer than the projection 1b by the length of a part 1a-1. Permanent magnets 2a and 2b are fixed face-to-face to the inner faces of the projections 1a and 1b and a center yoke 3 on which a movable coil 4 is movably fitted is fixed parallel with the projections to the inner center of the first outer yoke 1. A second outer yoke 5 is fixed to the top face of the shorter projection and the tip of one side face of the longer projection of the first outer yoke. Thereby a VCM is accurately located to a magnetic disc device main body regardless of the bad effect of the magnetic force of the permanent magnets on yoke assembly accuracy and a VCU is incorporated easily.

6. 发明专利

JP2004005945A OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE 审中-公开
公开(公告)号：JP2004005945A
公开(公告)日：2004-01-08
申请号：JP2003115575
申请日：2003-04-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORINOUCHI SHOGO , GOTO HIROSHI , MORI TAIICHI , HARUGUCHI TAKASHI , TAKAMURE HISANORI , TANAKA SHINJI , ASO JUNYA , FUKAKUSA MASAHARU , KOGA TOSHIHIRO , MATSUMOTO MITSUHIRO , FURUKAWA FUMINOBU
IPC分类号： G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide a thin type optical pickup device for recording/reproducing data on/from a low density optical disk and a high density optical disk, and to provide an optical disk device using the optical pickup device. SOLUTION: This optical pickup device has an LDA 11 of a short wavelength, an LDB 12 of a long wavelength, a beam splitter 41, an erect prism 23 for converting an optical axis into an optical axis perpendicular to an optical disk and an objective lens 32, wherein a composite filter 33 is arranged integrally with the objective lens 32, and the composite filter 33 is arranged oppositely to the erect prism 23 such that the surface of the composite filter 33 and the slant surface of the starting prism 23 are parallel to each other. COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2001043532A OPTICAL DISK DEVICE 失效
公开(公告)号：JP2001043532A
公开(公告)日：2001-02-16
申请号：JP21973099
申请日：1999-08-03
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAMURE HISANORI
IPC分类号： G11B7/0045
摘要： PROBLEM TO BE SOLVED: To improve signal properties of the header area and data area of a recordable/reproducible phase transition type optical disk. SOLUTION: This optical disk device is furnished with an optical system for ejecting a light beam on a track of the optical disk 1 as a converged spot, a photodetector 12 for receiving a reflected light passed through the recording surface of the optical disk 1 and detecting a signal corresponding to the intensity of the received light, and a signal producing part 13 for producing the plural signals from the output of the detector 12. In this case, a discrimination part 24 of information signal property for discriminating the superiority of the information signal property in the data area of the optical disk 1 and a light quantity control part 7 of semiconductor laser for controlling the quantity of ejected light of the simiconductor laser 5 throgh a semiconductor laser driver part 6, are provided in this device.

8. 发明专利

JPH08339550A ADJUSTING METHOD FOR CONTROL CIRCUIT FOR OPTICAL DISK DRIVING DEVICE 失效
公开(公告)号：JPH08339550A
公开(公告)日：1996-12-24
申请号：JP14722095
申请日：1995-06-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ARAI HISASHI , TAKAMURE HISANORI
IPC分类号： G11B7/09
摘要： PURPOSE: To enable a control circuit to perform a stable tracking control by performing focus adjustment for maximizing the amplitude of information signal before performing the offset adjustment of tracking error signal and the tracking servo pull-in. CONSTITUTION: Before performing tracking pull-in after performing focus pull-in by a servo part 8, A control part 9 adds an electric offset voltage to a focusing error signal detected during the movement of an objective lens and performs defocusing adjustment so that the amplitude of an information signal is made to be maximum. In an optical disk driving device 1 using an optical pickup 4 generating a tracking error signal by a pushpull system, by this adjustment, even when the pit shape of an optical disk 2 is asymmetric and the irradiating angle with a light beam is not perpendicular to the disk 2, a tracking error signal is adjusted by completely canceling the offset and stable tracking control is made possible while keeping a necessary jitter level.

9. 发明专利

JPH06274903A OPTICAL HEAD CONTROLLING DEVICE 失效
公开(公告)号：JPH06274903A
公开(公告)日：1994-09-30
申请号：JP6193293
申请日：1993-03-22
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： GONDO HIROYUKI , SUENAGA KIYOYUKI , TAKAMURE HISANORI , MURAOKA KOJI
IPC分类号： G11B7/09 , G11B21/10
摘要： PURPOSE:To obtain an optical head controlling device being excellent in a highly accuracy, stability and reliability by improving the delay of response in the digital servo control of an optical head and an error accompanied by a separated value control. CONSTITUTION:In this device, sampling data sampled at every constant period are inputted to a prediction unit 40 from a data register 39 and a prediction value of a next period is estimated and a digital servo control is performed by correcting predict-ed value to a limiting value when the predicted value exceeds the limiting value set in a limiting value generating part 45. Furthermore, the limiting values are made so as to be changed by sampling data at every previous period via the register 39. Thus, the optical head controlling device being excellent in a highly accuracy and reliability is obtained by improving the delay of the response in the digital servo control and the error accompanied by the separated value control.

10. 发明专利

JPH0536035A MAGNETIC HEAD SUPPORTING DEVICE FOR MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH0536035A
公开(公告)日：1993-02-12
申请号：JP496092
申请日：1992-01-14
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： TAKAMURE HISANORI , KANOU HISASHI
IPC分类号： G11B5/49 , G11B5/48 , G11B21/21
摘要： PURPOSE:To made a flexure light while holding a rigidity by forming the gimbal fixing part of the flexure to be a two-stepped shape, and fixing a slider through the gimbal between the both legs. CONSTITUTION:One edge of a flexure 16 of a thin plate girder constitution, is fixed to a rigid arm 9, and a slider 3 having a magnetic head is mounted through a thin plate-shaped gimbal 1 on the other edge of the flexer 16. The other edge of the flexure 16 is an almost U-shaped share-leg, the opposed side parts of the gimbal 1 are fixed across the both side leg parts, and the magnetic head 2 is positioned at a share-leg shaped notched part. Thus, the gimbal fixing part of the flexure 16 is the share-leg shape, and the slider 3 is fixed through the gimbal 1 between both the legs, so that the flexure 16 can be made light while holding the rigidity and a function necessitated at the time of performing a high speed access to the magnetic head.

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