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

JPH08191483A PORTABLE TERMINAL HAVING FUNCTION OF REMOTE OPERATION OF ELECTRONIC DEVICE 失效
公开(公告)号：JPH08191483A
公开(公告)日：1996-07-23
申请号：JP171495
申请日：1995-01-10
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： TAKAMI MINORU , INOUE MASAYUKI , NAKAMURA YUKIO , OGIJI KENJI , AKAI HIROSHI
IPC分类号： G06F15/02 , H04Q9/00
摘要： PURPOSE: To attain the operation without errors not requiring a troublesome operation by providing a signal transmission means for the electronic device so as to allow the portable terminal to directly set the operation of the electronic device on the outside. CONSTITUTION: A means being a display device 1, a display storage device 2 and a display controller 3 is used to display character information such as a music title and a singer name and character information such as genre and selection method for selection display. An information transmitter 7 sends signal information corresponding to the character information displayed on the display device 1 in an infrared ray. A means being part of a key entry device 5 and the information controller 6 selects desired character information by the user among the character information such as a music title displayed on the display device 1. A decision means being the information storage device 4 and the remaining part of the information controller 6 decides the signal information corresponding to the character information or the like selected by the selection means. An information transmitter-receiver 8 receives an infrared ray while receiving it and writes the signal to the information storage device 4.

72. 发明专利

JPH07110956A RECORDING AND REPRODUCING APPARATUS FOR DISC TYPE RECORDING MEDIUM 失效
公开(公告)号：JPH07110956A
公开(公告)日：1995-04-25
申请号：JP25579093
申请日：1993-10-13
申请人： HITACHI LTD
发明人： TANAKA HISAMITSU , FUKUI YUKIO , INOUE MASAYUKI , SUZUKI YOSHIO
IPC分类号： G11B7/095
摘要： PURPOSE:To obtain a good tracking error signal which is not influenced by recording pit with two sub-beam fluxes while an information signal is recorded with a main beam flux. CONSTITUTION:Grooves 1 and lands 2 are alternately formed on at disc type recording medium and the main beam flux 4c sequentially records information signal on the grooves 1 in every other groove to form a recording pit 3. Two sub-beam fluxes 4a, 4b are located with deviation of only + or -5/4 track pitch in the radial direction of the disc type recording medium with respect to the main beam flux 4c, the reflected beams of these two sub-beam fluxes 4a, 4b are converted into electrical signals and difference of these signals is obtained to obtain a tracking error signal of the main beam flux 4c. Since the recording pit is not formed on the grooves of both sides of the groove 1 on which the main beam flux 4c is located, the reflected beams of the two sub-beam fluxes 4a, 4b are not influenced by the recording pit. Therefore, the obtained tracking error signal is also not influenced by the recording pit.

73. 发明专利

JPH0750017A DISK-SHAPED RECORDING AND REPRODUCING APPARATUS 失效
公开(公告)号：JPH0750017A
公开(公告)日：1995-02-21
申请号：JP19331193
申请日：1993-08-04
申请人： HITACHI LTD
发明人： SUZUKI YOSHIO , INOUE MASAYUKI , TANAKA HISAMITSU , NAKAJIMA JUNJI , SUZUKI MOTOYUKI , FUKUI YUKIO
IPC分类号： G11B7/09
摘要： PURPOSE:To obtain the apparatus, which can perform stable reproduction, even for an optical disk, which can reproduce high-density phase pitch information higher than the reading limit caused by the wavelength of a light source and the aperture of an objective lens. CONSTITUTION:Two secondary luminous fluxes 4b and 4c on the surface of an optical disk are arranged so that the luminous fluxes are offset by 1/2 track pitch or more, e.g. 5/4 or 9/4 track pitch with respect to a main luminous flux 4a. A servo signal is generated from the luminous fluxes. The output power of a laser is switched in response to the kind or the operating mode of the optical disk. Thus, the stable detection of the servo signal can be performed, and the life of the optical disk can be elongated.

74. 发明专利

JPH06349087A TRACKING CONTROLLER AND OPTICAL RECORDING AND REPRODUCING DEVICE USING IT 失效
公开(公告)号：JPH06349087A
公开(公告)日：1994-12-22
申请号：JP13075793
申请日：1993-06-01
申请人： HITACHI LTD
发明人： ONISHI KUNIKAZU , SASAKI TORU , SUZUKI YOSHIO , INOUE MASAYUKI , MIURA MICHIO , SUZUKI MOTOYUKI , TANAKA HISAMITSU
IPC分类号： G11B7/08 , G11B7/09
摘要： PURPOSE:To obtain a tracking controller which can drastically reduce tracking offset caused by displacement of a light spot and is suitable for using for a separate type optical disk device. CONSTITUTION:A trapezoidal prism 20 tilting to a light axis is arranged in a light path between two reflecting mirrors 21 and 22 being rotatable. Two reflecting mirrors are constituted so that they are rotated by the same angle in the same direction at the same time. By using this constitution, deflection of the light axis by refraction function of the trapezoidal prism and parallel movement of a reverse direction for it occur at the same time, and position deviation of the light axis of an incident laser beam on an object lens 7 can be compensated. Consequently, occurrence of tracking offset accompanied by racking control of the light spot can be greatly reduced.

75. 发明专利

JPH06266606A MEMORY 失效
公开(公告)号：JPH06266606A
公开(公告)日：1994-09-22
申请号：JP5394393
申请日：1993-03-15
申请人： HITACHI LTD
发明人： NISHIYAMA KAZUHIDE , DAIJIYOU SHIGETO , KUMAI HIROYUKI , INOUE MASAYUKI
IPC分类号： G06F12/00
摘要： PURPOSE:To read storage information at high speed. CONSTITUTION:An address latch 3 latches a previous row address. When the latch row address 105 of the address latch 3 differs from a row address 102, a non-coincidence detection circuit 4 outputs a non-coincidence signal 106 showing that they are non-coincident. At that time, row unit information 107 which is read from a memory array 2 passes through a row information latch 5 and information designated by a row address 103 is selected by a selector 7. A CPU reads information 204. From an output control circuit 8 after it becomes valid, and the row address 102 is latched by the address latch 3. When the row address 102 coincides with the latch row address 105, the non-coincidence signal 106 showing non-coincidence is obtained. The row information latch 5 inhibits row unit information 107 from the memory array 2 and transmits valid information which is latched by it to the selector 7. The CPU immediately reads it.

76. 发明专利

JPH06251411A OPTICAL HEAD AND OPTICAL DISK DEVICE 失效
公开(公告)号：JPH06251411A
公开(公告)日：1994-09-09
申请号：JP3317393
申请日：1993-02-23
申请人： HITACHI LTD
发明人： IMADA RITSUO , SHIBATA TORU , INOUE MASAYUKI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/09 , G11B7/135
摘要： PURPOSE:To provide an optical head with which the change in the positional relation of respective constituting elements with lapse of time is eliminated and which has simple constitution as the optical head for recording and reproducing signals to and from an optical disk. CONSTITUTION:A light emitting element 1 and a beam splitter 2 are integrally packaged on a light receiving element 8. This beam splitter 2 is provided with a reflection surface 5 which reflects the reflected light from the disk 10 separated by a luminous sepn. surface 4 toward the light receiving element 8. This reflection surface 5 is formed as a cylindrical surface to generate an astigmatism at the light receiving surface in the reflected light so that the detection of a focus error signal by an astigmatism method is made possible. The detection of the tracking error signal by a three-spot system is made possible by providing the beam splitter 2 with the diffraction grating 3.

77. 发明专利

JPH06236567A TRACKING ERROR DETECTOR AND OPTICAL DISK DEVICE EQUIPPED WITH THE SAME 失效
公开(公告)号：JPH06236567A
公开(公告)日：1994-08-23
申请号：JP2111393
申请日：1993-02-09
申请人： HITACHI LTD
发明人： NAKAJIMA JUNJI , INOUE MASAYUKI , SUZUKI YOSHIO , ONISHI KUNIKAZU
IPC分类号： G11B7/095
摘要： PURPOSE:To provide an optical disk device capable of generating satisfactory tracking error signals for each of plural disks that have different track intervals from each other as the tracking error detector in an optical disk device. CONSTITUTION:A main spot as well as two sets of side spots are irradiated on an optical disk by a diffraction grating more than two surfaces. From four light receiving regions 1a to 1e, on which reflected lights of the side spots are made incident, two kinds of tracking error signals are generated by employing two sets of differential detection systems 2 and 3. At that time, the distance between the respective sets of side spots is optimally set against each of the two kinds of track intervals.

78. 发明专利

JPH0696401A MAGNETO-OPTICAL RECORDING/REPRODUCING DEVICE AND MAGNETIC HEAD 失效
公开(公告)号：JPH0696401A
公开(公告)日：1994-04-08
申请号：JP24449092
申请日：1992-09-14
申请人： HITACHI LTD
发明人： KISHI YUJI , MIURA MICHIO , INOUE MASAYUKI , SUZUKI YOSHIO
IPC分类号： G11B5/02 , G11B5/187 , G11B11/10
摘要： PURPOSE:To provide a magneto-optical recording/reproducing device and the magnetic head, capable of reducing the amount of wear of a disk due to a contact with the magnetic head when the magnetic head is brought into contact with the disk, and also capable of protecting the disk. CONSTITUTION:The surface side of magnetic head 10 confronted with the disk 1 is formed to the curved surface shape and a corner of the magnetic head 10 is separated from the surface of the disk 1. Consequently, the friction force between the disk 1 and magnetic head 10 is reduced since the corner of magnetic head 10 is not hooked to the surface of disk 1, and the wear amount of the disk 1 is reduced, then the disk 1 is protected.

79. 发明专利

JPH0628693A SEPARATION TYPE OPTICAL HEAD 失效
公开(公告)号：JPH0628693A
公开(公告)日：1994-02-04
申请号：JP18496192
申请日：1992-07-13
申请人： HITACHI LTD
发明人： MIURA MICHIO , ONISHI KUNIKAZU , SASAKI TORU , INOUE MASAYUKI
IPC分类号： G11B7/09 , G11B7/135
摘要： PURPOSE:To provide a separation type optical head capable of sufficiently suppressing the offset of a tracking error signal even when a tracking control means is set to a fixed optical system and operated. CONSTITUTION:A wedge shape prism 40 and a prism drive means 41 are provided in a fixed optical system 10, and the wedge shape prism 40 is rotated, and a beam outgoing from a second surface 40b is deflected, and the emitting position of the beam is displaced and then tracking control is executed. Then, this head is constituted so that displacement in the incident position of the beam on an objective lens 3 according to the deflection and the displacement in the emitting position of the beam in the second surface 40b are roughly canceled each other.

80. 发明专利

JPH05325244A OPTICAL HEAD 失效
公开(公告)号：JPH05325244A
公开(公告)日：1993-12-10
申请号：JP13097091
申请日：1991-06-03
申请人： HITACHI LTD
发明人： IMADA RITSUO , ONISHI KUNIKAZU , SASAKI TORU , INOUE MASAYUKI
IPC分类号： G02B5/18 , G11B7/135
摘要： PURPOSE:To make an optical disk device thin by reducing the number of parts of the optical head, which records and reproduces a signal on an optical information recording medium, to reduce its dimensions in the vertical direction. CONSTITUTION:An optical path separating means 2 is provided between a semiconductor laser 1 and a reflecting diffraction grating 3, and grating lines of the reflecting diffraction grating 3 are formed like curves at irregular intervals, and the 1st-order diffracted light of the reflecting diffraction grating 3 is led to an objective lens 5, and the divergent luminous flux emitted from the semiconductor laser 1 is converted to parallel rays of a luminous flux. Thus, the reflecting diffraction grating 3 is provided with functions of a collimator lens, an optical path turning mirror, and a beam shaping prism.

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