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公开(公告)号：JPS6369002A
公开(公告)日：1988-03-29
申请号：JP21255086
申请日：1986-09-11
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO
Abstract: PURPOSE:To reduce the number of grooves and to improve a magnetic linkage characteristic by adjacently arranging signal transmission coils connected to magnetic heads with the same azimuth on the core of a rotary transformer and providing short rings between the sets of coils. CONSTITUTION:A set of magnetic heads H1a and H2a and a set of magnetic heads H1b and H2b, both of which are adjacent and have different azimuth angles by 90 deg., are disposed on a rotary drum 15. A video tape MT is wound at the angle of >=270 deg. and driven. The signal transmission coils L1a and L1b or L2a and L2b connected to the set of heads H1a and H1b with the same azimuth or the set of H2a and H2b with the same azimuth are paired and adjacently arranged on the grooves G1-G5 pierced on the surface confronted with circular magnetic cores 18 and 19 in the rotary transformer 17 which rotates with an alternate long and short dash line as an axis. The short rings SR are disposed between the sets. The one end of the coil L is grounded and the other is connected to an amplifier 21. Simultaneously the input of a terminal 23 grounds the coil L through a switching element 22 which shorts and controls the coil L, whereby the adverse influence of a signal leaking from the adjacent transmission coils can be prevented.
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公开(公告)号：JPS62246111A
公开(公告)日：1987-10-27
申请号：JP9081786
申请日：1986-04-18
Applicant: SONY CORP
Inventor： SHIMA HISATO , YAMASHITA KEITARO , KUBOTA YUKIO
Abstract: PURPOSE:To discriminate whether a head chip is good or not before a winding is formed with an actual wire rod, by bringing plural conductor pieces into contact with one another across an aperture of the head chip to form an equivalent winding and measuring the electric characteristic. CONSTITUTION:An approximately equivalent one-turn winding is formed with a pair of upper and lower conductor pieces 12 and 13, and a voltage corresponding to the characteristic of a head chip 10 is indicated on a voltmeter 17 when a current is applied by a current source 16. Since shapes of conductor pieces 12 and 13 forming the equivalent winding are uniform, electric measurement is possible with the equivalent one-turn winding. That is, since the shape of the winding is always uniform in distinction from the case of winding of a narrow wire rod, plural conductor pieces 12 and 13 are brought into contact with each other to form the equivalent winding, thereby measuring the electric characteristic of the head chip 10.
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公开(公告)号：JP2006270398A
公开(公告)日：2006-10-05
申请号：JP2005084338
申请日：2005-03-23
Inventor： TANAKA NAOHIRO , YAMASHITA KEITARO
Abstract: PROBLEM TO BE SOLVED: To inhibit a transmission to a region peripheral section of unnecessary vibrations generated in a region in which a vibrator element is formed.
SOLUTION: The region 40 in which one or a plurality of the vibrator elements are formed is surrounded by a barrier having an acoustic impedance different from the region.
COPYRIGHT: (C)2007,JPO&INPITAbstract translation: 解决的问题：为了抑制在形成振动元件的区域中产生的不必要的振动的区域周边部分的传递。 解决方案：其中形成有一个或多个振动器元件的区域40被具有与该区域不同的声阻抗的屏障包围。 版权所有（C）2007，JPO＆INPIT
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公开(公告)号：JP2000090608A
公开(公告)日：2000-03-31
申请号：JP26135798
申请日：1998-09-16
Applicant: SONY CORP
Inventor： YADA HIROAKI , YAMASHITA KEITARO
Abstract: PROBLEM TO BE SOLVED: To generate a control signal for tracking control even by a short servo area, to form a plurality of servo areas, and to secure sufficient tracking control characteristics and capacity even if the rotary speed of a magnetic disk is switched by referring to the reproduction signal of a plurality of servo areas for generating a common clock. SOLUTION: A servo clock generation circuit 27C takes in a reproduction signal PB at timing when a magnetic bed 29 scans a clock area based on a gate signal GT1 being outputted from an address detection circuit 27B, and uses the taken-in reproduction signal PB as a reference for reproducing a servo clock CK. In this case, in a magnetic disk 24, each servo area is created in synchronization with a fixed clock, thus generating the precise servo clock CK in reference to one magnetization pattern being formed in the clock area and securely generating the servo clock CK even if low-speed and high-speed modes are switched.
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公开(公告)号：JPH10340533A
公开(公告)日：1998-12-22
申请号：JP14691097
申请日：1997-06-04
Applicant: SONY CORP
Inventor： OKADA SHUNJI , YAMASHITA KEITARO
IPC: G11B20/10
Abstract: PROBLEM TO BE SOLVED: To provide PC(personal computer) compatibility for a data recording device which directly records an AV(audio visual) signal on a logical block. SOLUTION: A disk medium 3 is provided, in its logical block corresponding to a user area, with a first area for recording file control information, with a second area for recording the address of continuous digital data and with a third area for recording the continuous digital data. A data recording device is provided with a disk mechanism part 1 having the above disk medium 3 and with a disk control part 10 that conduct control to this disk mechanism part 1 through a recording reproducing part 5. This disk control part 10 is equipped with an AV signal header detecting part 28 which detects, from the AV signal that is the continuous digital data inputted from an external signal source, a header that is switched depending on the kind of this AV signal and that is provided every unit data constituting the continuous digital data.
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Patent Agency Ranking
公开(公告)号：JPH10162483A
公开(公告)日：1998-06-19
申请号：JP33309996
申请日：1996-11-29
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO , OKADA KANZO , OKADA SHUNJI , NAKAYAMA MASAYUKI , WATANABE MINORU
Abstract: PROBLEM TO BE SOLVED: To perform speed-variable recording/reproducing for a magnetic disk. SOLUTION: When a rotational number mode setting command is inputted from an I/F 41, a CPU 39 reads a control sequence from a storing means 40 and then controls each section based on the read sequence. Thus, each node SW driving circuit 34 sequentially switch-drives the field winding wires of a pulse motor 1-1 to reach a specified rotational number. In this case, feedback control is performed to reach the specified rational number instructed by the rotational number mode setting command.
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公开(公告)号：JPH09312827A
公开(公告)日：1997-12-02
申请号：JP14974496
申请日：1996-05-22
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO
IPC: H04N5/7826 , H04N5/91
Abstract: PROBLEM TO BE SOLVED: To provide a recording and reproducing device on which a proper image denoting a content of recorded broadcast program is displayed. SOLUTION: After receiving a broadcast program received by an antenna 1 with a video channel selection tuner 2, the signal is converted into a digital signal, a representative screen detection circuit 5 detects scene change information and gives the information to a 1st microcomputer 20. The scene change information is extracted by, e.g. a motion detection circuit and depending on a broadcast program, a field address of a commercial image is found out of the information detected by the motion detection circuit and several frames before and after the image are designated for an index display screen. The digital video signal is inputted to an encoder 8, in which image processing is conducted and the result is stored in a storage device 22 being a recording disk medium via a multiplexer 18 together with an audio signal. The index screen is displayed by the operation at reproduction to recognize the content of a recorded program and digest reproduction to reproduce the scene change screens is conducted so as to grasp the recording content.
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公开(公告)号：JPH0850775A
公开(公告)日：1996-02-20
申请号：JP18706294
申请日：1994-08-09
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO , NAKAGAWA TOMIHIRO , IMAIZUMI SAKAE , KAMASU KAZUYA
IPC: G11B23/38
Abstract: PURPOSE:To easily recognize a label when loading a disk cartridge into a storage box or a recording/reproducing device by easily recognizing information indicated on a label applied to a rear-surface label area by increasing the area. CONSTITUTION:The disk cartridge which is housed in a cartridge body 3 so that a disk-shaped recording medium can be rotated freely is provided with an inclined rear-surface label area 5 on one side surface 3a of the cartridge body 3.
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公开(公告)号：JPH0817159A
公开(公告)日：1996-01-19
申请号：JP14838294
申请日：1994-06-29
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO , NAKAGAWA TOMIHIRO , IMAIZUMI SAKAE
IPC: G11B23/03
Abstract: PURPOSE:To obtain a wide opening onto which an optical pickup device, etc., face and reduce the size of a disc cartridge by a method wherein the opening is provided so as to have an inclination from a direction in which the disc cartridge is inserted. CONSTITUTION:A cartridge main part 4 is a thin housing composed of a pair of an upper half 2 and a lower half which are made to butt against each other. An opening 11 onto which a disc turning driving means and an optical pickup device 13 which are built in a recording/reproducing apparatus face is provided in the main surface of the lower half. The opening 11 is formed from the center part of a recording disc 1 so as to have an inclination from a direction in which the cartridge is inserted. That is, the opening 11 has an inclination angle smaller than 45 degrees from a straight line which passes through the center of the recording disc 1 and is vertical to the direction in which a shutter is transferred.
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公开(公告)号：JPH07296383A
公开(公告)日：1995-11-10
申请号：JP8682694
申请日：1994-04-25
Applicant: SONY CORP
Inventor： YAMASHITA KEITARO , KUBODERA HISAMITSU
IPC: G11B5/86
Abstract: PURPOSE:To eliminate the need of special frequency characteristics for dealing with the deterioration thereof due to the field transfer at the time of recording on a mother magnetic recording medium. CONSTITUTION:The coil in a transfer bias field head is fed with an AC current, corresponding to an oscillation signal from an oscillator, from an amplifier and a transfer bias field is applied to a part where a mother tape MT touches a copy tape CT thus transferring a recorded content from the tape MT to the tape CT. The strength of transfer bias field is then varied sequentially and the frequency of signal to be recorded on the tape MT is changed sequentially among a plurality of types of frequency for each strength of transfer bias field thus transferring the recorded content from the tape MT to the tape CT. The reproduced output level of the CT tape is then measured in order to determine the transfer frequency characteristics for each strength of transfer bias field. A strength of transfer bias field for obtaining optimal transfer characteristics, i.e., the transfer frequency characteristics substantially identical to those for head recording, is then selected based on the transfer frequency characteristics thus determined.
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