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1. 发明专利

JP2003091841A TRACKING CONTROLLER 审中-公开
公开(公告)号：JP2003091841A
公开(公告)日：2003-03-28
申请号：JP2001283006
申请日：2001-09-18
申请人： JAPAN BROADCASTING CORP , UNIV NAGAOKA TECHNOLOGY
发明人： YANAGISAWA HITOSHI , KOIDE DAIICHI , TOKUMARU HARUKI , OISHI KIYOSHI
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To provide a tracking controller having the stable and high follower property with respect to a track on an optical disk rotating at a high speed. SOLUTION: The stable compensation signal is obtained in such a manner that the improvement of a tracking error signal made by the compensation signal added to the tracking error signal is obtained by a means for producing the tracking error compensation signal and it is added to the tracking error signal as the tracking error compensation signal by an adding means 14.

2. 发明专利

JP2002027378A MAGNETIC DISK DEVICE FOR RECORDING/REPRODUCING VIDEO DATA 失效
公开(公告)号：JP2002027378A
公开(公告)日：2002-01-25
申请号：JP2000203568
申请日：2000-07-05
申请人： JAPAN BROADCASTING CORP
发明人： YANAGISAWA HITOSHI , MITSUYASU TAMOTSU
IPC分类号： H04N5/78 , G11B20/10 , H04N5/765 , H04N5/781
摘要： PROBLEM TO BE SOLVED: To prevent video display from breaking at the time of accessing a magnetic disk at random in a field unit. SOLUTION: Two magnetic disk devices where the sum of maximum seek time, maximum rotation waiting time and maximum data transfer time is smaller than the reciprocal of a frame frequency and three memories storing video data in the field units are installed. Video data are simultaneously recorded on the two magnetic disk devices. At the time of reproduction, a field (f1) is designated on either one of the magnetic disk devices. Video data reproduced from the device is transferred to a memory M1, and the next field (f2) of the other magnetic disk device is designated during transfer. Video data reproduced from the device is transferred to the memory. Then, a continuous field (f3) is designated to either magnetic disk device during transfer.

3. 发明专利

JP2001195856A MAGNETIC RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JP2001195856A
公开(公告)日：2001-07-19
申请号：JP2000001331
申请日：2000-01-07
申请人： JAPAN BROADCASTING CORP
发明人： MITSUYASU TAMOTSU , YANAGISAWA HITOSHI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To increase the reliability of a device by correctly detecting contact between a head and a disk and suspending recording/reproducing so as to prevent damage in the magnetic recording/reproducing device of a magnetic head floating type. SOLUTION: An annular piezoelectric vibrator 10 is inserted into a spindle rotary shaft 13 for loading a magnetic disk 2. When the head is brought into contact with the disk, the signal of an intrinsic frequency is generated from the piezoelectric vibrator by a piezoelectric effect, and collision between the head and the disk is detected.

4. 发明专利

JPH03150753A TAPE POSITION CONTROLLER 失效
公开(公告)号：JPH03150753A
公开(公告)日：1991-06-27
申请号：JP28754689
申请日：1989-11-06
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： KATO TAIICHIRO , YANAGISAWA HITOSHI , SEKIGUCHI TAKUJI , SAKAMOTO MANABU , GOMYO MASATO , MIYASHITA MITSUTAKA
IPC分类号： G11B15/61 , G11B15/60
摘要： PURPOSE:To surely and easily control the shift of a tape in its width direction by moving two rotors which hold the running tape between them and revolve in the tape width direction in accordance with a sensor which detects the tape width direction. CONSTITUTION:A running tape 5 is held between a revolving guide roller 1 and a pinch roller 2. Then a sensor 3 detects the position of the tape 5 in its width direction, and the roller 2 is moved in the tape width direction by the detection output of the sensor 3. At the same time, the roller 1 also moves after the roller 2. Thus one of both rotors is pressed to the other and at the same time these rotors are supported so that they can move in the tape width direction. Then the shift of the tape 5 can be surely and easily controlled in its width direction with no sliding of the tape 5 on a post.

5. 发明专利

JPH01271957A TAPE TRAVELING MECHANISM 失效
公开(公告)号：JPH01271957A
公开(公告)日：1989-10-31
申请号：JP9915488
申请日：1988-04-21
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： KATO TAIICHIRO , YANAGISAWA HITOSHI , ABE KAZUO , MITSUYASU TAMOTSU , SEKIGUCHI TAKUJI , HASHIZUME TSUNEHARU , OKINA TOSHIHIKO , MIYASHITA MITSUKI
IPC分类号： G11B15/60
摘要： PURPOSE:To travel a tape surely and stably by detecting an error from the reference height position of the tape by a sensor and adsorbing the tape onto a post without a regulating edge and correcting activity the up-and-down position of the tape by an actuator. CONSTITUTION:There are diaphragms 2 connected to a tube 5 on a post to guide a traveling tape 7, air is sucked and the tape 7 is adsorbed onto the post 1 by negative pressure. Photosensors 8 are set on the side of the post, the tape 7 detects the up-and-down (tape width direction) fluctuation quantity from the reference height position, feeds it back to a voice coil 4 and both the post 1 and the adsorbed tape 7 are driven to their regular positions by a voice coil motor composed of a coil 4 and a magnet 6. Thus, the up-and-dowm fluctuation can be corrected without damaging the edges of the tape 7 and the action of a traveling system can be surely stabilized.

6. 发明专利

JPH10222828A MAGNETIC RECORDING/REPRODUCING DEVICE 失效
公开(公告)号：JPH10222828A
公开(公告)日：1998-08-21
申请号：JP2355897
申请日：1997-02-06
申请人： JAPAN BROADCASTING CORP
发明人： YANAGISAWA HITOSHI , SEKIGUCHI TAKUJI
IPC分类号： G11B5/027 , G11B5/588 , G11B15/467
摘要： PROBLEM TO BE SOLVED: To form a recording track suited to a recording format and to perform precise additional recording/reproducing by intersecting the recording track at an angle answering to the recording format and providing a fixed head recording a linear head scan position detecting signal synchronized with rotation of a rotary drum over at least a whole width of a program area of a magnetic tape. SOLUTION: When a locus shown by that a head scan position detector 11 traces on the magnetic tape coincides precisely with the prescribed recording format, a frequency of a detection signal by the detector 11 coincides with the frequency of the detection signal by a drum rotation angle detector 8. Then, a phase difference between both detection signals becomes a fixe level always. When the locus that detector 11 traces on the magnetic tape is shifted from the prescribed recording format, a time difference occurs between the detection signal by the head scan position detector 11 and the detection signal by the drum rotation angle detector 8. Thus, a phase difference is changed in proportion to an amount shifted from the recording format.

7. 发明专利

JPH027257A DISPLACEMENT DETECTOR 失效
公开(公告)号：JPH027257A
公开(公告)日：1990-01-11
申请号：JP15844388
申请日：1988-06-27
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： KATO TAIICHIRO , YANAGISAWA HITOSHI , HAYASHI YOSHIO
IPC分类号： G11B15/60 , G11B19/00 , G11B19/12
摘要： PURPOSE:To detect the displacement in a width direction of a body to be detected and the inclination of the body to be detected by performing the comparative arithmetic operation of the detecting output of a sensor arranged at the edge on one side of the body to be detected and the sensor arranged at the edge on the other side. CONSTITUTION:The sensors A and B being arranged at the upper edge part of a tape 1 are constituted of light emitting parts 5a and 5b, and light receiving parts 6a and 6b arranged oppositely interposing the upper edge part of the tape, respectively. The quantity of light arriving at each of the light receiving parts 6a and 6b changes corresponding to the displacement of the tape 1, and it is possible to detect the displacement of two locations at the edge on one side of the tape 1 from the output of the sensors A and B. Also, similarly, it is possible to detect the displacement of two locations at the edge on the other side of the tape 1 from the output of the sensors C and D arranged at the edge below tape 1. Then, the detecting output of the sensors A, B, C, and D are compared with each other. In such a way, the displacement in the width direction and the inclination of the tape 1 can be detected.

8. 发明专利

JPH03150754A TAPE DRIVING DEVICE 失效
公开(公告)号：JPH03150754A
公开(公告)日：1991-06-27
申请号：JP28754789
申请日：1989-11-06
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： YANAGISAWA HITOSHI , KATO TAIICHIRO , SEKIGUCHI TAKUJI , SAKAMOTO MANABU , GOMYO MASATO , MIYASHITA MITSUTAKA
IPC分类号： G11B15/61
摘要： PURPOSE:To control the running position of a tape in its width direction by providing a means which moves a tape guide in the tape width direction via a sensor which detects the position of the tape in its width direction and connecting these parts in one body at the tape running position. CONSTITUTION:A tape guide 5 is supported by a slider 4 so as to move up and down, and the position of a running tape 3 is detected by a sensor 38 in the tape width direction. Then a tape width direction shift means 12 is provided at a position near a stopper 10. Then a connection means 13 connects the guide 5 and the means 12 together in one body when the slider 4 is controlled by the stopper 10 in terms of its position. In such a constitution, the means 12 is controlled by the sensor 38 and then the tape 39 is controlled at a constant height by the guide 5.

9. 发明专利

JPH0393021A HERICAL SCAN TYPE MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH0393021A
公开(公告)日：1991-04-18
申请号：JP22928789
申请日：1989-09-06
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： YANAGISAWA HITOSHI , SEKIGUCHI TAKUJI , OKINA TOSHIHIKO , HASHIZUME TSUNEHARU
IPC分类号： G11B5/53
摘要： PURPOSE:To set the contact state of a magnetic tape and a magnetic head to be satisfactory by fitting the magnetic head by means of inclining it from a plane intersecting orthogonally with the rotary axis of a rotary drum to a fixed drum-side. CONSTITUTION:The magnetic head 10 is provided with a head chip 3, a head base 5 and a spacer 6. The chip 3 is provided so that it inclines to the fixed drum-side by a prescribed angle theta against the plane B intersecting orthogonally with the rotary axis A by fitting the base 5 on the bottom 11 intersecting orthogonally with the rotary axis A of the rotary drum 1 in the head 10. The magnetic tape 4 travels on the drum surface 9 of the drums 1 and 2 while it is wound to the drums 1 and 2. Thus, the chip 3 obliquely scans on the tape 4 at high speed by allowing the chip 3 fixed to the drum 1 to rotate at high speed together with the drum 1.

10. 发明专利

JPH02306416A HELICAL SCAN TYPE ROTARY HEAD DRUM UNIT 失效
公开(公告)号：JPH02306416A
公开(公告)日：1990-12-19
申请号：JP12666689
申请日：1989-05-22
申请人： JAPAN BROADCASTING CORP , SANKYO SEIKI SEISAKUSHO KK
发明人： KATO TAIICHIRO , YANAGISAWA HITOSHI , SEKIGUCHI TAKUJI , OKINA TOSHIHIKO , KOBAYASHI KAZUO
IPC分类号： G11B5/55 , G11B5/588 , G11B15/60 , G11B15/61
摘要： PURPOSE:To attain the stable and sure running of a tape by detecting the tape variance with a tape position detecting sensor set along a virtual lead and driving a dynamic tracking actuator to move a head in its axial direction for correction of the deviation value caused against the virtual lead. CONSTITUTION:Plural position sensors 3 are set along a virtual lead 2 which presumes a reference running position for one of two edges of a tape 4 on the rotary drums 1 and 6. The sensors 3 detects the deviation value of the running tape 4 against the lead 2. Based on this detection signal, a dynamic tracking actuator is driven to move both heads 1 and 6 toward their axial directions. Thus the driving positions of the heads 1 and 6 are corrected and scanned. As a result, the deflection equal to the deviation value of the tape 4 measured on the heads 1 and 6 is given to both heads 1 and 6 respectively. Then the heads 1 and 6 are positioned at each prescribed position. In other words, a state equal to that where the tape 4 runs along the lead 2 is secured. Thus the tape 4 can run stably with no impairment.

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