公开(公告)号：JPS63149820A

公开(公告)日：1988-06-22

申请号：JP29828886

申请日：1986-12-15

Applicant: SONY CORP

Inventor： MISHIMA AKIO ,  YAMAKAWA KIYOSHI ,  HAYAKAWA ATSUNORI ,  NORIHASHI SHIGEO

IPC: G11B5/48 ,  G11B5/60 ,  G11B17/32

Abstract: PURPOSE:To decrease the effect of air dynamic pressure by arranging symmetrically to plural pairs of sliders around a prescribed line orthogonal to a radius of a disk as a symmetrical axis and selecting the area of the tip face of a main magnetic pole smaller than the area of the tip face of the slider. CONSTITUTION:Magnetic heads 12, 13 clipping a disk 25 at a prescribed track position of the disk 25 support the disk 25 by opposed sliders 14A, 17B; 14B, 17A; 15A, 18B; 15B, 18A. In this case, the slide resistance at the inner and outer side of the disk 25 is nearly the same and the production of vibration of the disk 25 is suppressed based on the center line (a) of the magnetic heads 12, 13. Since the main magnetic poles 16, 19 are projected higher than each slider, the disk 25 supported slidably by the sliders 15A, 18B; 14A, 17B is in press contact with the magnetic pole 16 toward the magnetic head 13 and the production of spacing between the disk 25 and the main magnetic pole 16 is prevented. Thus, the stable drive of the disk 25 is attained and high density recording is attained.

公开(公告)号：JPS52132810A

公开(公告)日：1977-11-07

申请号：JP4896676

申请日：1976-04-29

Applicant: SONY CORP

Inventor： YAMAKAWA KIYOSHI

IPC: G05D13/62 ,  G11B5/027 ,  G11B15/18 ,  G11B15/467 ,  G11B20/02 ,  H04N5/91

Abstract: PURPOSE:To prevent dubbing of VTR tape, by replacing vertical synchronizing pulses in predetermined fields by pulses having an integration value smaller than the vertical synchronizing pulses, and recording the latter pulses in the tape in place of the former.

公开(公告)号：JPH07104278A

公开(公告)日：1995-04-21

申请号：JP26998093

申请日：1993-09-30

Applicant: SONY CORP

Inventor： YAMAKAWA KIYOSHI ,  SAITO ETSURO

IPC: G02F1/13 ,  G02F1/1335 ,  H04N5/74

Abstract: PURPOSE:To provide a video projector compensating the coarseness of a television image projected on a screen and improving picture quality. CONSTITUTION:In the projector constituted of a liquid crystal pannel 27 displaying the television image, a projection lens 31 and the screen 32, an optical axis conversion element 30 constituted of wedge prisms 5 and 6 is arranged forward the liquid crystal pannel 27. By vibrating a driving mechanism 38 constituted of a piezoelectric element and a moving coil provided between the wedge prisms 5 and 6 synchronizing with a vertical synchronizing signal, when the wedge prism 6 is moved to a lens 31 side, an optical axis is shifted upward. This projector is constituted so that video signals of an odd field and an even field are displayed by the same pixels of the liquid crystal pannel 27, and respective fields are alternately displayed periodically, and the projected positions of the images of respective fields on the screen 32 are shifted by 1/4 pitch upward or downward by one line synchronizing with the vertical synchronizing signal of a video signal.

公开(公告)号：JPH05290329A

公开(公告)日：1993-11-05

申请号：JP2304393

申请日：1993-02-10

Applicant: SONY CORP

Inventor： ISHIKAWA OSAMU ,  SAITO NORIO ,  MORIMOTO TADASHI ,  YAMAKAWA KIYOSHI

IPC: G11B5/31

Abstract: PURPOSE:To obtain good recording and reproducing characteristics even in a high-frequency region by constituting the thin-film magnetic head of an upper layer core and lower layer core consisting of 'Permalloy(R)' alloy films and laminated films of soft magnetic films having the high saturation magnetic flux density specified in film thickness and saturation magnetic flux density. CONSTITUTION:The upper layer core 5 and lower layer core 2 are formed of the 'Permalloy(R)' alloy films 6, 10 and the laminated soft magnetic films 11 having =1T saturation magnetic flux density in order to obtain the high saturation magnetic flux density. In addition, the soft magnetic films 11 are positioned to a gap side. More specifically, a ferromagnetic material, such as potassium titanate, is used for a substrate 1, a thermally stable Ni-Fe alloy for the core 2, SiO2 for the gap film 6 and Cu for a conductor coil 4. The core 5 is disposed to face the core 2 with the film 6 in-between. Namely, the cores 2, 5 are magnetically coupled via the back gap and magnetic gap by holding a coil 4 therebetween to constitute a magnetic circuit part. The high recording and reproduced outputs are obtd. in such a manner without complicating the production process.

公开(公告)号：JPH0490110A

公开(公告)日：1992-03-24

申请号：JP20524890

申请日：1990-08-03

Applicant: SONY CORP

Inventor： YAMAKAWA KIYOSHI

IPC: G11B5/31

Abstract: PURPOSE:To form a magnetic thin film without impairing its magnetic characteristics and to improve head efficiency and resolving power by forming a 1st insulating film to the film thickness smaller than the depth of a magnetic gap and forming the magnetic thin film by sputtering. CONSTITUTION:The 1st insulating film 2 which functions as a gap film is formed on a substrate 1. This insulating film 2 is formed to the film thickness smaller than the depth of the magnetic gap. The 1st insulating film 2 is etched with a resist 3 as a mask and the magnetic thin film 4 which is a lower magnetic material is formed by sputtering to cover the 1st insulating film 2a on the substrate 1. Since the magnetic thin film is formed at the time of the gap film formed to the thickness smaller than the depth of the magnetic gap in this way, the film formation to suppress the shade effect by the gap film is executed and the deterioration in the magnetic characteristics of the magnetic thin film is prevented. Then, the high head efficiency and high resolving power are obtd. and the recording and reproducing characteristics are improved.

公开(公告)号：JPS58100204A

公开(公告)日：1983-06-14

申请号：JP19768881

申请日：1981-12-10

Applicant: SONY CORP

Inventor： MORITA MASAAKI ,  YAMAKAWA KIYOSHI ,  KUBOTA YUKIO

IPC: H04N5/7826 ,  G11B5/027 ,  G11B5/86

Abstract: PURPOSE:To obtain interchangeability between a large-sized cassette tape and a small-sized cassette tape and to improve recording and reproducing performance by constituting a small-sized cassette tape recording and reproducing system for a large-sized cassette tape recording and reproducing system, and using tapes of the same size and forming recording patterns and pilot signals in specular-surface symmetrical relation. CONSTITUTION:Recording and reproducing systems 10 and 20 consist of a portable TV camera 1 which incorporates a magnetic recording device 2 for S cassette tapes 3, a magnetic recording and reproducing device 4 dedicated to S tapes, a TV receiver 5, a magnetic transferring machine 9 which performs magnetic transfer from an S tape to an L tape, a TV screen 7, and a VTR for L tapes. Through a magnetic head H and a rotating roll R, the recording pattern of an S tape 3 is transferred to an L tape 9 of the same size in specular-surface symmetrical relation, and tracks ch-1 and ch-2 for audio signals and a track for a signal CTL for removing a wow and flutter of audio signals are formed over and under a video signal along both edges. Thus, interchangeability is obtained and the performance of the recording and reproducing system is improved.

公开(公告)号：JPS58100202A

公开(公告)日：1983-06-14

申请号：JP19768681

申请日：1981-12-10

Applicant: SONY CORP

Inventor： YAMAKAWA KIYOSHI ,  MORIO MINORU ,  KUBOTA YUKIO

IPC: H04N5/7826 ,  G11B5/027 ,  G11B5/86

Abstract: PURPOSE:To give tape cassettes interchangeability by providing a small-sized tape cassette recording and reproducing system to a large-sized tape cassette recording and reproducing system, and using tapes of the same size and setting specular-surface symmetrical magnetic patterns. CONSTITUTION:The 1st and the 2nd recording and reproducing systems 10 and 20 consist of a portable TV camera 1 which incorporates a magnetic recording device 2 for recording a video and an audio signal on an S cassette tape 3, a magnetic recording and reproducing device 4 dedicated to S tape cassettes 3, a TV receiver 5, a magnetic transferring machine 6 which performs magnetic transfer from an S cassette tape 3 to an L cassette tape 9, a TV screen 7, and a magnetic recording and reproducing device 8 for L cassette tapes 9. Through a magnetic head H and a rotating roller R, the recording pattern of the S cassette tape 3 is transferred to the L cassette tape 9 of the same size as a slave in specular-surface symmetrical relation. Therefore, the S and L cassette tapes 3 and 9 are compatible and video shotted by the TV camera 1 is reproduced by the VTR8.

公开(公告)号：JPH04167211A

公开(公告)日：1992-06-15

申请号：JP23187390

申请日：1990-08-31

Applicant: SONY CORP

Inventor： MIYAUCHI SADAICHI ,  YAMAKAWA KIYOSHI ,  MATSUZONO JUNJI

IPC: G11B5/31 ,  G11B5/39

Abstract: PURPOSE:To improve a decrease in permeability due to narrowing of a track by arranging a current flowing conductive layer extended at the intermediate part of a magnetic gap forming section in a gap depth direction part of a magnetic gap forming section in a gap depth direction across the gap longitudinally of the gap to allow a current to flow in this direction. CONSTITUTION:A current flowing conductive layer 1 for allowing a current to flow longitudinally of a particularly narrow magnetic gap (g) of a thin film magnetic yoke 37 at a magnetic gap forming section for forming the gap (g), i.e., ends 37AE and 37BE is buried. In this case, if a magnetic field generated by the current flow of the layer 1 is applied, for example, in a direction from above to below of this paper in the current direction of the layer 1, a magnetic field indicated by an arrow is generated around the layer 1 of the yoke 37. Thus, permeability near the gap (g) is improved, and its reproduced output can be improved.

公开(公告)号：JPS63229675A

公开(公告)日：1988-09-26

申请号：JP6350487

申请日：1987-03-18

Applicant: SONY CORP

Inventor： MISHIMA AKIO ,  YAMAKAWA KIYOSHI

IPC: G11B23/03

Abstract: PURPOSE:To regulate and to prevent so-called tramp caused by the curve of a disk when the disk is rotated by forming guide parts which crimp the disk at the inside of a cartridge main frame with ceramic. CONSTITUTION:The disk 1 made of a thin metallic film is housed freely rotatably in the cartridge main frame 13 and the guide parts 15 and 16 which crimp the disk 1 are formed at the inside of the cartridge main frame 13 opposed to the disk 1 with the ceramic. By this ceramic guide parts 15 and 16, the so-called tramp caused by the curve of the disk when the disk is rotated is certainly regulated. As the ceramic guide parts 15 and 16 are rigid, it is not peeled at the time of the regulation. Thus the recording face of the disk 1 is not injured.

公开(公告)号：JPS63122083A

公开(公告)日：1988-05-26

申请号：JP26930986

申请日：1986-11-11

Applicant: SONY CORP

Inventor： YAMAKAWA KIYOSHI ,  OMORI SHOJI ,  KAMAYA NAOKI

IPC: G11B27/00 ,  G11B5/86

Abstract: PURPOSE:To rapidly select a desired program by recording an index information pertaining to the kind, etc. of the content in a slave tape together with the content of a master tape. CONSTITUTION:On the transmission side of a printing system for a rental soft cassette, a controller 16 controls a master VTR 15, the index information such as the title name, etc. of a video program is inserted in a program supplied from the master VTR 15 as a title code along with a start code and a stop code by an encoder 17 and a mixer 18. On the reception side, a code detector circuit 20 detects a code signal, decoded by a decoder 21, and transmitted to a controller 22. The controller 22 records the index information in a slave VTR 23 as well as the video program. Accordingly, an information desired to be known can be obtained in a slave tape rapidly.