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11. 发明专利

JPH01217510A SYSTEM FOR APPLYING AND INTERRUPTING POWER SOURCE FOR COMPUTER PERIPHERAL EQUIPMENT 失效
公开(公告)号：JPH01217510A
公开(公告)日：1989-08-31
申请号：JP4209788
申请日：1988-02-26
申请人： FUJI ELECTRIC CO LTD
发明人： NASU TOSHIYUKI
IPC分类号： G06F1/26 , G06F1/00
摘要： PURPOSE:To prevent the operating miss of a power switch or to prevent operation from the forgotten, etc., by executing the opening and closing of the switch of a power source plug socket with the prescribed condition of a computer and automatically executing the inputting and interrupting of the power source of a peripheral equipment. CONSTITUTION:Switches 12A-12C for control are additionally set and operated to turn-on and off by the instruction from a CPU11 of a computer main body 1. Namely, manual power switches 4A, 5A and 6A of the peripheral equipment, which is connected to the main body 1, are always turned on. In the peripheral equipment of high using frequency, when a main switch 2 is turned on, the switch for control is always made in a turning-on condition. In the peripheral equipment of the low using frequency, only when it is used, the switch for control is turned on. Thus, the power source supply of the peripheral equipment is automatically executed and the turning-on and off operation of the manual switches 4A, 5A and 6A can be omitted. Accordingly, the operating miss of the power switches 4A, 5A and 6A can be erased and the operation can be prevented from being forgotten.

12. 发明专利

JPH07169193A DISK STORAGE DEVICE 失效
公开(公告)号：JPH07169193A
公开(公告)日：1995-07-04
申请号：JP31235893
申请日：1993-12-14
申请人： FUJI ELECTRIC CO LTD
发明人： OHATA HIROSHI , NASU TOSHIYUKI
IPC分类号： G11B20/12
摘要： PURPOSE:To make a CDR system, by which the line recording density of data in a disk surface is made constant, easily applicable with respect to a storage device in which plural pieces of heads are provided on each disk surface without complicating the control of a data reading/writing operation. CONSTITUTION:Plural heads 2 are provided on each surface of a disk 1, on which many tracks T are set, shifting by a certain number of track pitches, and each surface of the disk 1 is divided into plural zones Za, Zb, etc., in which the number of sectors in tracks is different and also at this time, for example, three tracks T corresponding to heads H1 to H3 are made to always belong to the same zone. Further, the number of sectors Sa, Sb in tracks Ta, Tb belonging to zones Za, Zb are set so that line recording density of data become almost constant regardless of positions in the radial direction in the disk 1.

13. 发明专利

JPH04345930A CONTROL SYSTEM FOR EMITTED LASER LIGHT QUANTITY FOR OPTICAL DISK STORAGE DEVICE 失效
公开(公告)号：JPH04345930A
公开(公告)日：1992-12-01
申请号：JP11775391
申请日：1991-05-23
申请人： FUJI ELECTRIC CO LTD
发明人： NASU TOSHIYUKI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/125
摘要： PURPOSE:To always confirm the accurate emitted light quantity by comparing the detected quantity of light emitted from a light emitting element with the control target value given from a storage means and controlling the light emitting element to correct the deviation of the emitted light quantity and at the same time producing a timing pulse according to the change of the read/write state to update the target value at each time and synchronously with the timing pulse. CONSTITUTION:A low read state and a high write state are designated by a target value storage means 20 and a processor 50 respectively and then given to a pulse generating circuit 60. The circuit 60 produces the timing pulses in accordance and synchronously with the changes of those states and gives these pulses to an A/C converter 12 of an emitted light quantity detecting means 10, the processor 50, and a detected value storage means 70. The means 70 converts the detected value of the means 10 into the digital value by the converter 12 in response to the timing pulse and reads and stores the digital value at each time. Thus the change of the emitted light quantity is known at each time. The processor 50 reads the storage contents of the means 70 and updates the target value stored in the means 20 to always set the emitted light quantity at a reference target level even if the light emitting characteristic of a light emitting element 4 is changed by the influence of temperatures, etc.

14. 发明专利

JPH04238118A ID READING METHOD FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH04238118A
公开(公告)日：1992-08-26
申请号：JP542391
申请日：1991-01-22
申请人： FUJI ELECTRIC CO LTD
发明人： NASU TOSHIYUKI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/09 , G11B20/18
摘要： PURPOSE:To judge whether the cause for infeasbility of ID reading lies in the reckless run of an optical head or not by detecting the driving force of the optical head at every failure in one time of finely segmented ID detection. CONSTITUTION:The ID written on a disk is read via an ID detector 3 or the like while a focus servo and a track servo are held applied to a light spot. If the normal reading is not possible, the reading operation is continued for a prescribed period of time via an ID detection time out monitor device 4, etc., and thereafter, the driving force of the optical head 1 is detected by an instrument 7 for measuring the driving force of the optical head, etc. At least the processing to prevent the reckless run of the head 1 is executed when the driving force is discriminated to be abnormal by a device 8 for discriminating the abnormality of the driving force, et. The above-mentioned reading operation and the operation to detect the driving force are repeated if the driving force is normal. The ID reading abnormality is discriminated if the results of the detection by an ID detection time out count device 5 and a count-over deciding device 24, etc., are normal.

15. 发明专利

JPH0628775A SYSTEM FOR SETTING TRACK OF DISK MEMORY 失效
公开(公告)号：JPH0628775A
公开(公告)日：1994-02-04
申请号：JP18139292
申请日：1992-07-09
申请人： FUJI ELECTRIC CO LTD
发明人： NASU TOSHIYUKI
IPC分类号： G11B20/12
摘要： PURPOSE:To increase the utilization efficiency of a disk area by reducing a margin imparted to a track width to a head width for compensating fluctuation in the setting accuracy of a head position generated from the fluctuation in the detection accuracy of servo information according to a radial direction position caused by the difference between an inner diameter and an outer diameter in a disk. CONSTITUTION:The surface of the disk 1 is divided into plural areas R1-R4 whose radial direction positions are different from each other, and tracks T1-T4 are set by writing servo information SI consisting of plural servo information parts Sa, Sb, Sc, Sd so that the track widths w1-w4 in these areas are narrowed gradually from an innermost peripheral side area R1 to an outermost peripheral side area R4. Thus, the utilization efficiency of the disk area and the storage capacity of a disk memory are increased by about 20% for instance.

16. 发明专利

JPH0337833A TRACK SEEK CONTROL METHOD FOR OPTICAL DISK DEVICE 失效
公开(公告)号：JPH0337833A
公开(公告)日：1991-02-19
申请号：JP17165889
申请日：1989-07-03
申请人： FUJI ELECTRIC CO LTD
发明人： NASU TOSHIYUKI
IPC分类号： G11B21/08 , G11B7/085
摘要： PURPOSE:To perform a stable seek operation irrespective of the presence/ absence of disturbance and to perform a tracking operation on a track nearest to a targeted track by counting the number of track traverse signals, and attaching a prescribed correction value. CONSTITUTION:ID data 13 is read from the pre-format signal 9 of the track tracking at present via an ID detection circuit 6. Next, a seek controller 7 calculates the number of seek tracks 12 from the data 13 to the targeted track, and sets it on a counter circuit 5. After that, an optical head 2 is driven via a driving device 3, then, a seek operation is started. Next, a velocity control command 14 is sent to the driving device 3 so that speed data 10 from a speed calculation circuit 4 can coincide with speed data obtained by fitting the residual number 11 of seek tracks from the counter circuit 5 in a speed profile decided in advance.

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