专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JPH06302139A DISK CARTRIDGE 失效
公开(公告)号：JPH06302139A
公开(公告)日：1994-10-28
申请号：JP8654493
申请日：1993-04-13
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B23/03
摘要： PURPOSE:To provide a disk cartridge capable of preventing the destruction of a disk as a result of biting of dust on the surface of the disk by a magnetic head even if a dustproof means is not provided on the side of a recording/ reproducing device. CONSTITUTION:In a disk cartridge in which a disk is housed rotatably, and having a magnetic head inserting hole 12 and a shutter 6 covering the inserting hole while interposing liner sheets 8a, 8b for cleaning, this cartridge is provided with a means for rotating the disk 10 by a prescribed angle liked with the opening of the shutter 6 or a member for cleaning the the disk 10 on the shutter 6 linked with the opening of the shutter 6.

72. 发明专利

JPH0312854A MAGNETIC HEAD 失效
公开(公告)号：JPH0312854A
公开(公告)日：1991-01-21
申请号：JP14770189
申请日：1989-06-09
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B17/32 , G11B5/60
摘要： PURPOSE:To stably hold the contact state of magnetic heads and a recording medium and to prolong the life of the recording medium and the magnetic heads by forming a groove part provided between first and second slider parts in parallel to a magnetic head core in such a way that negative pressure occurs by means of air flow near the heads based on the shift of the recording medium. CONSTITUTION:A first slider 3 having a read/write core and a second slider 4 which is adjacent to the first slider 3 are provided and the groove 1 provided in parallel to the read/write core 2 is formed between two sliders. A part of the groove part is furthermore planed and it is worked in a form where negative pressure occurs by air flow near the head based on the rotating recording medium. Consequently, absorption force by negative pressure occurs even if the recording medium 9 rotates at high speed. Thus, the contact state of the recording medium and the magnetic heads 7 and 8 can stably be held and the life of the recording medium 9 can be kept long.

73. 发明专利

JPH02143945A MAGNETIC HEAD DEVICE 失效
公开(公告)号：JPH02143945A
公开(公告)日：1990-06-01
申请号：JP29903388
申请日：1988-11-26
申请人： SEIKO EPSON CORP
发明人： YAMAGUCHI YOSHIYUKI , ARAI YOSHIO
IPC分类号： G11B17/32 , G11B21/20
摘要： PURPOSE:To efficiently attenuate a resonance phenomenon caused by a torsional vibration without deteriorating the followup ability for a disk by providing a viscoelastic body at one position of the elastic part of a gimbal to be approximately symmetrical to the circumferential direction of the disk. CONSTITUTION:Viscoelastic bodies are embedded in two parts of the clearance parts between a substrate part 4a and an inner frame part 4b of the gimbal corresponding to the positions diagonal to the circumferential direction of a disk 6 with a head 3 as its center, and these viscoelastic bodies are fixed to the thin side faces of the substrate parts 4a and the inner frame parts 4b. In general, the maximum amplitude at resonance time tends to become smaller as viscous resistance becomes larger. Consequently, the viscous resistance of the torsional vibration can be heightened, and the resonance can be attenuated by embedding the viscoelastic body 1 at the diagonal positions. Thus, the resonance phenomenon caused by the torsional vibration can be efficiently suppressed without deteriorating the followup ability of the head for the disk.

74. 发明专利

JPH0246516A MAGNETIC HEAD DEVICE 失效
公开(公告)号：JPH0246516A
公开(公告)日：1990-02-15
申请号：JP19648788
申请日：1988-08-06
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B5/41 , G11B5/11 , G11B5/58 , G11B5/60
摘要： PURPOSE:To prevent the decrease of a recording magnetic field to occur from the resonance phenomenon of a gimbals and the reduction of the reproducing output by sticking a shielding plate through a viscoelastic substance to the gimbals or a magnetic head. CONSTITUTION:A shielding plate as a headband shield to surround a magnetic head 2 from four corners is stuck through a viscoelastic substance 1 to a gim bals 3. Consequently, by adding the oscillation system of a shielding plate and a viscoelastic substance to the oscillation system of the gimbals 3, the viscosity coefficient of all oscillation systems can be set by the viscoelastic substance 1. The larger the viscosity resistance is, the smaller the maximum amplitude at the time of resonating becomes, and by heightening the viscosity resistance of all oscillation systems, the maximum amplitude at the time of resonating is attenuated. Thus, the decrease of the recording magnetic field and the reduc tion of the reproducing output do not periodically occur, and the performance of a magnetic disk device can be secured.

75. 发明专利

JPH0191307A PEAK SHIFT SUPPRESSION SYSTEM 失效
公开(公告)号：JPH0191307A
公开(公告)日：1989-04-11
申请号：JP24747187
申请日：1987-09-30
申请人： SEIKO EPSON CORP
发明人： MUKOYAMA FUMIAKI , IKEGAMI TOMIO , ARAI YOSHIO
IPC分类号： G11B20/14 , G11B5/09
摘要： PURPOSE:To suppress peak shift, and to realize densification by storing every pulse interval of read data by fixed quantities, and performing bit correction by estimating peak shift quantity due to inter-waveform interference. CONSTITUTION:The pulse interval is measured from the read data RD by a tau2 measurement circuit 11, and when the pulse interval within a prescribed range continues extending over more than prescribed range continues extending over more than prescribed number of pieces, it is detected as a sink field by a sink field detection circuit 12. When the sink field is detected, respective variables are initialized according to it, and the storage and the arithmetic operation like averaging, etc., of the variables of pulses of fixed number of pieces are performed by a variable storage circuit and an arithmetic circuit 13. Then, the pulse interval and the peak shift quantity are estimated by a T1 estimation circuit 14 and a PSO estimation circuit 15, and are stored in the circuit 13. Next, the circuit 13 outputs successively the estimated peak shift quantity to an RD correction circuit 17, and corrects the read data. Thus, the peak shift is suppressed, and reproduction at the time of low resolution comes possible, and the densification can be realized.

76. 发明专利

JP2004012871A DATA TRANSFER CONTROL SYSTEM, ELECTRONIC APPLIANCE, AND DATA TRANSFER CONTROL METHOD 审中-公开
公开(公告)号：JP2004012871A
公开(公告)日：2004-01-15
申请号：JP2002167095
申请日：2002-06-07
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO , SATO DAISUKE
IPC分类号： G06F13/38 , G09G5/00 , H04N7/24 , H04N19/00 , H04N19/102 , H04N19/134 , H04N19/136 , H04N19/139 , H04N19/15 , H04N19/164 , H04N19/423 , H04N19/426 , H04N19/46 , H04N19/70
摘要： PROBLEM TO BE SOLVED: To provide a data transfer control system, an electronic appliance, and a data transfer control method capable of realizing a data transfer with less power consumption and saving memory resources. SOLUTION: The data transfer control system includes a transfer controller 160 that transfers compressed data including compressed image data to a device controller 210 via a bus 200, and a transfer rate setting section 130 that sets the transfer rate of the transfer controller 160 based on the data storage status of a memory 290 on the side of the device for storing the received compressed data. The transfer rate of the transfer controller 160 is set so as to make the stored data amount of the memory 290 between a 1st data amount DA1 and a 2nd data amount DA2. The transfer rate setting section 130 analyses the compressed data and sets the transfer rate based on image data amount specifying information (bit rate) included in the compressed data. COPYRIGHT: (C)2004,JPO

77. 发明专利

JPH11328858A BOOST REGULATION METHOD FOR HIGH-PASS STRESSING FILTER 失效
公开(公告)号：JPH11328858A
公开(公告)日：1999-11-30
申请号：JP5275799
申请日：1999-03-01
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO , IWASHITA TAKAHIRO
IPC分类号： G11B20/10 , G11B7/00 , G11B7/005
摘要： PROBLEM TO BE SOLVED: To obtain a disk device having high reliability at a good yield without the need for regulation work in correspondence to an environment fluctuation and the variation of a disk by setting the boost quantity of a high-pass stressing filter in such a manner that phase error voltage formed by converting the phase error pulse of a PLL to a voltage value is minimized. SOLUTION: After an RF signal 9 is amplified by a preamplifier 1, an AGC and equalizer 2 absorbs an output decrease, removes high-frequency noise and boosts the neighborhood of the high-pass component extremely degraded in amplitude by inter-code interference, thereby executing waveform equalization. This signal is binarized by a slicer 3 and binarized synchronizing data 12 is formed by a clock signal 11 synchronously separated by the PLL 4 and the binarized data 10. The boost quantity of the equalizer 2 is given as a boost voltage 14 by a voltage conversion circuit 5 which converts the UP/DOWN pulse 13 from the PLL 4 to a phase error voltage. As a result, the boots regulation is automatically and rapidly executed by the disk device and the reliability and yield are improved.

78. 发明专利

JPH07121851A MAGNETIC HEAD DEVICE 失效
公开(公告)号：JPH07121851A
公开(公告)日：1995-05-12
申请号：JP26389493
申请日：1993-10-21
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B5/60 , G11B21/02
摘要： PURPOSE:To prevent the generation of static electricity due to the sliding contact of flexible terminal substrates and to prevent a malfunction due to electrostatic noise. CONSTITUTION:The side face part 21a of a first flexible terminal substrate rubing with a second flexible terminat substrate 2b, the side face 22a of the first flexible terminal substrate rubing with the side face angle 6a of the rear part of a first carriage fitting part 6 and the second flexible terminal substrate 21b rubing with the vicinity part of the projecting deformed part 15a of a frame 15 are coated with a conductive lubricant. In such a manner, the generation of static electricity due to the sliding contact is prevented and electric charges are released. The surface resistance of the lubriant is made to be 10kOMEGA to 100kOMEGA and the composition components ratio of the electrical conductivity increasing agent of the lubriant is made to be greater than 1.0wt.%. By this constitution, since the degradation of durability of the flexible terminal substrate is prevented, dusts are hardly adsorbed and corrected, the inducing of the breakdown of a medium and the generation of an error due to the sticking of dusts to a magnetic heads and the medium can be prevented and the reliability of a product is improved.

79. 发明专利

JPH0312059A MAGNETIC HEAD 失效
公开(公告)号：JPH0312059A
公开(公告)日：1991-01-21
申请号：JP14485089
申请日：1989-06-07
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B17/32 , G11B5/60
摘要： PURPOSE:To stably hold the contact state of a recording medium with a magnetic head by providing a groove part between a first slider and a second slider in parallel with a magnetic head core, and embedding a negative pressure generating plate to generate negative pressure by the movement of the recording medium. CONSTITUTION:The magnetic head is provided with the first slider 4 having a read/write core and the second slider 5 adjacent to the slider 4, and a groove 1 provided in parallel with the magnetic head core is formed between those sliders. The negative pressure generating plate 2a is embedded in the part of the groove 1, and the neighborhood of the read/write gap 9 of the part of the groove 1 in the center part is narrowed for the progressive direction of the recording medium. Therefore, an air flow is generated in the same direction as the progressive direction of the recording medium based on a rotating recording medium. The air flow is squeezed in the neighborhood of the read/write gap 9, and the negative pressure is generated, which attracts the recording medium. The contact state between the magnetic head and the recording medium can be stably held even when the recording medium is rotated at high speed with an attractive force.

80. 发明专利

JPH02143963A DIGITAL POSITIONING CONTROLLER FOR MAGNETIC HEAD 失效
公开(公告)号：JPH02143963A
公开(公告)日：1990-06-01
申请号：JP29903488
申请日：1988-11-26
申请人： SEIKO EPSON CORP
发明人： ARAI YOSHIO
IPC分类号： G11B21/10
摘要： PURPOSE:To improve the followup characteristic of the magnetic head for the eccentric modes of various frequencies by serially inserting digital filters to generate plural since waves having different arbitrary frequencies into a round loop. CONSTITUTION:When sampling time is made into T, a position error (e) to indicate the difference between a target position gamma to be followed up by the magnetic head and a magnetic head position chi is inputted to a digital controller 4 every sampling time T. The digital controller 4 calculates a balanced point address nu of a step motor, and the balanced point address nu is held by a sample zero hold 1 and outputted to a driving system 3 as a balanced point address value (u) of the step motor during the sampling time T after DELTA time from the preceding sampling time T, namely, after (T+DELTA) time (DELTA: delay time equivalent to the calculation time of the digital controller). Further, the digital controller includes the digital filters to generate a DC component, the first component sine wave, and the second component sine wave. Thus, the followup characteristic can be improved.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式