Patents by Inventor Kunio Kojima
Kunio Kojima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5774428Abstract: First, a recording magnetic field is generated by a magnetic head using a coil drive current a.sub.1, and a first data signal is recorded on a groove of a recording layer of a magneto-optical disk. Thereafter, similarly, a second data signal is recorded on the same groove as above by a coil drive current a.sub.2. In this case, the first and second data signals have different signal frequencies which do not overlap each other. The amplitude A.sub.1 of the coil drive current a.sub.1, is set greater than the amplitude A.sub.2 of the coil drive current a.sub.2. This arrangement permits multiple recording and increases the recording capacity of the magneto-optical disk.Type: GrantFiled: June 27, 1996Date of Patent: June 30, 1998Assignee: Sharp Kabushiki KaishaInventors: Tomoyuki Miyake, Nobuo Ogata, Kunio Kojima
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Patent number: 5764607Abstract: An information recording and reproduction apparatus uses a recording medium that contains information which prohibits digital copying. A reproduction section reproduces the desired informatiion stored on a first recording medium. A recording section records the reproduced output at a desired position on a second recording medium. However, an erasing section erases the information from the first recording medium during the process of recording that information on the second recording medium. The first and/or second recording medium cannot be removed from the information recording and reproduction apparatus until the erasing operation is completed.Type: GrantFiled: October 9, 1996Date of Patent: June 9, 1998Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Kunio Kojima, Jun Akiyama
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Patent number: 5696742Abstract: A light sensor is divided into two light receiving sections which receive light reflected by an optical disk. A first intermediate address signal is generated from a difference signal of outputs of the light receiving sections. A second intermediate address signal is generated from a sum signal of outputs of the light receiving sections. An address generating circuit generates an address signal by using the first and second intermediate address signals. An optical disk device stably generating an address signal regardless of a displacement of an objective lens and a change in reflectance of the optical disk is thus provided.Type: GrantFiled: April 25, 1996Date of Patent: December 9, 1997Assignee: Sharp Kabushiki KaishaInventors: Nobuo Ogata, Yasuo Nakata, Yoshihiro Sekimoto, Kunio Kojima, Hideaki Sato
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Patent number: 5660876Abstract: A cathode ray tube which comprises a front panel coated with a nonglare film having a multi-layered structure. The multi-layered structure comprises at least a visible light absorbing layer containing a black dye, and an antistatic layer containing an inorganic metal compound as a conductive agent.Type: GrantFiled: June 6, 1995Date of Patent: August 26, 1997Assignee: Sony CorporationInventors: Kunio Kojima, Takashi Setsuda, Takumi Takamura, Kouichi Kaneko, Hideo Kusama
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Patent number: 5659528Abstract: An information recording-reproduction method wherein: upon reproducing, recorded information corresponding to a predetermined number of sectors from the leading sector of each of a plurality of information tracks on an optical disk is preliminarily stored on a buffer memory, and during a period in which the optical pickup is shifted to another information track, the recording information, stored in the buffer memory, is reproduced; and upon recording, during a period in which the optical pickup is shifted to another information track, recording information is temporarily stored in the buffer memory, and after completion of the recording, the recording information is recorded on the optical disk. In this method, information tracks, which are formed on the optical disk discontinuously with one .another, are regarded as if they were continuous tracks, and the apparent recording and reproducing operation is carried out continuously.Type: GrantFiled: November 28, 1994Date of Patent: August 19, 1997Assignee: Sharp Kabushiki KaishaInventors: Kunio Kojima, Yoshihiro Sekimoto, Yasuo Nakata, Tomoyuki Miyake, Nobuo Ogata, Toshiharu Inui
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Patent number: 5598297Abstract: An image display unit is capable of displaying an environmental image at the periphery of an image on a display screen in order to create an image having heightened reality and to provide greater comfort to the eyes. The image display unit includes a liquid-crystal display for displaying a main image at a central portion of a visual field, a back light thereof, a slide for displaying an image at the periphery of a main central image, a back light thereof and a lens system for magnifying an image synthesized from the above-mentioned images. Displaying an environmental image at the periphery of an image on a display screen in accordance with an observer's preference, effectively raises the ambiance of the display and increases the comfort of viewing the display.Type: GrantFiled: August 17, 1994Date of Patent: January 28, 1997Assignee: Sharp Kabushiki KaishaInventors: Atsushi Yamanaka, Kunio Kojima
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Patent number: 5555229Abstract: Pieces of leading compressed information, each of which corresponds to a predetermined number of blocks of each of a plurality of programs recorded on an optical disk, are successively read therefrom, and stored in a buffer memory in a compressed state as they are. Upon reproducing a certain program, the corresponding leading compressed information is read from the buffer memory, and reproduced after having been subjected to a decompressing process in an information-decompression processing circuit. The program is continuously reproduced by reading compressed information corresponding to the predetermined number of blocks following the leading compressed information from the optical disk and supplying the compressed information to the buffer memory. With this arrangement, it is possible to eliminate a slow switching operation in the case when programs are switched to start reproducing a different program.Type: GrantFiled: July 7, 1994Date of Patent: September 10, 1996Assignee: Sharp Kabushiki KaishaInventors: Kunio Kojima, Shigemi Maeda, Jun Akiyama
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Patent number: 5546364Abstract: A magneto-optical memory apparatus for enhancing the recording density of a magneto-optical recording medium, thereby to increase its recording capacity. The magneto-optical recording medium having recording marks, each having two ends in which information is recorded.Type: GrantFiled: September 26, 1994Date of Patent: August 13, 1996Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Fuji, Toshihisa Deguchi, Kunio Kojima, Takeshi Yamaguchi, Shigeo Terashima, Akira Takahashi, Kenji Ohta
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Patent number: 5500839Abstract: A magneto-optical recording and reproducing apparatus includes a magnetic head for modulating a magnetic field according to a recording signal. There are three separate coils around a single magnetic core the magnetic head. Three coil driving circuits are included, each one associated with a separate coil for switching the direction of magnetic field generated by said separate coils. A selecting circuit is used for starting or stopping the transmission of the recording signal to the coil driving circuits.Type: GrantFiled: December 22, 1994Date of Patent: March 19, 1996Assignee: Sharp Kabushiki KaishaInventors: Tomoyuki Miyake, Toshiharu Inui, Jun Akiyama, Kunio Kojima
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Patent number: 5462428Abstract: An improvement in the construction of a unit carriage (5), on which an injection unit (4) is mounted in a injection molding machine, the improvement being concerned with simplifying the construction of the unit carriage (5), making easier the removal of a screw and nut (19, 20) of the nozzle touching mechanism (6), preventing the screw (19) from whirling, and making easier continuously detecting actual nozzle touching pressure.Type: GrantFiled: December 2, 1993Date of Patent: October 31, 1995Assignee: Fanuc Ltd.Inventors: Susumu Ito, Kunio Kojima
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Patent number: 5459705Abstract: In an optical recording medium driving apparatus, only a frequency component corresponding to pits of an ID portion is detected from a total signal representing a total amount of reflected light from an optical disc by a high pass filter. With this frequency component clamped so that a potential at a maximum point becomes a definite potential, a changed amount of light of the total signal corresponding to pits is detected and a phase pit signal is generated. In response to this phase pit signal, a signal component corresponding to pits is removed from the total signal, thereby generating a pit removal signal.Type: GrantFiled: July 8, 1992Date of Patent: October 17, 1995Assignee: Sharp Kabushiki KaishaInventors: Hirotsugu Matoba, Hiroshi Fuji, Kunio Kojima
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Patent number: 5457667Abstract: A data recording and reproducing apparatus uses a rewriteable optical disk with pre-recorded absolute address information, and comprises a data compression circuit for dividing and compressing continuous digital data into compressed plural data blocks, an expansion circuit to restore the compressed data to the original expanded form, and a buffer memory. Data is compressed in discrete data blocks and is recorded sequentially block by block to the optical disk. The compressed data is likewise read block by block from the disk during data reproduction. Using the data expansion circuit to expand the compressed data one block at a time, the data recording and reproducing apparatus can reproduce the original continuous digital data stream. Plural continuous digital data selections can thus be reproduced by alternately fetching data for the plural selections from the disk in compressed data block units and temporarily storing the data to a buffer memory for expansion.Type: GrantFiled: January 21, 1993Date of Patent: October 10, 1995Assignee: Sharp Kabushiki KaishaInventors: Kunio Kojima, Shigemi Maeda, Jun Akiyama
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Patent number: 5434991Abstract: An information recording and reproducing device uses a recording medium which is provided with units composed of blocks and a unit information recording area which includes unit allocation information, sector number information indicating the number of sectors per unit and unit number information identifying each unit. When the recording medium is placed in the device, the respective information is read by a calculating unit which calculates physical sector numbers corresponding to a block specified for recording and reproduction operations. Access operations are performed to the calculated sectors, which allows the desired information to be recorded. The block includes dummy sectors which are added before and after each group of predetermined numbers of effective sectors. When high-volume information is recorded over several blocks, the dummy sectors may be provided only for the first and last blocks.Type: GrantFiled: March 19, 1991Date of Patent: July 18, 1995Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Kunio Kojima, Kazuaki Okumura, Shigeo Terashima
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Information reproducing apparatus for properly synchronizing the reproducing of recorded information
Patent number: 5434829Abstract: An information reproducing apparatus has (1) a reference signal generating circuit for generating a first reference signal corresponding to reproduced signal of the main information; (2) a first switching circuit for selecting one of the reproduced signal and the first reference signal; and (3) a controller, which generates a selection instructing signal, for controlling such that the reproduced signal is selected during reproducing of the main information recorded area while the first reference signal is selected during reproducing of the main information unrecorded area. With the arrangement, when the main information unrecorded area is reproduced, the clock for carrying out the reproducing of main information is synchronized with the first reference signal which corresponds to the reproduced signal.Type: GrantFiled: June 15, 1993Date of Patent: July 18, 1995Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Tomiyuki Numata, Kunio Kojima -
Patent number: 5432768Abstract: A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and including an information recording area wherein information entered from external devices is recorded and a Table of Contents area wherein additional address information with respect to the information recorded in the information recording area is recorded. The TOC area contains the absolute addresses of the recording positions of each information recorded in the information recording area. A display section graphically and independently displays the recorded and unrecorded ranges of the information recording area according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information.Type: GrantFiled: June 22, 1993Date of Patent: July 11, 1995Assignee: Sharp Kabushiki KaishaInventors: Shigeo Terashima, Toshihisa Deguchi, Kunio Kojima, Shigemi Maeda
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Patent number: 5349768Abstract: In a conveyor for carrying linens having processes of gripping any corner and one place on a side including the corner of a rectangular cloth (sheet 1) with clips 45 installed on a movable clamp 35; naturally hanging the cloth by raising with a clamp transfer conveyor; moving the cloth onto the top surface of a table composed of a flat belt conveyor 77 or the like by using the clamp 35; and pulling the cloth onto the table, the conveyor for carrying linens includes a drive section comprising: a clamp body 36; two pairs of wheels 39 supported by shafts fixed to the clamp body 36; a toothed block 37 which has a plurality of tooth-shaped protrusions engaging with a toothed belt 34 for driving the clamp and is installed straddling over the clamp body 36 by a pin 40 inserted into an elongated hole so that it can be moved downward by the height of the tooth-shaped protrusion; and a compression spring 41 which is energized so as to push the toothed block 37 in the engaging direction, and is engaged between the clampType: GrantFiled: May 18, 1993Date of Patent: September 27, 1994Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Hidetoshi Ishihara, Atsushi Ueda, Kunio Kojima
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Patent number: 5343452Abstract: A data recording/reproducing apparatus uses a single recording medium in which absolute address data are previously formed. Also, the data recording/reproducing apparatus has a first memory for recording and a second memory for reproducing. Audio data reproduced from the recording medium is stored in the second memory at a first transfer rate, and the audio data stored in the second memory is sequentially read at a second transfer rate lower than the first transfer rate to be audio-reproduced, while audio data inputted from external is sequentially stored in the first memory at the second rate and the audio data stored in the first memory is read at the first transfer rate to be recorded on the recording medium. The aforementioned reproducing and recording operations are alternately repeated. Thus, the data recording/reproducing apparatus allows audio data recording operation to be concurrently performed during audio reproduction with the single recording medium.Type: GrantFiled: November 19, 1992Date of Patent: August 30, 1994Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Kunio Kojima, Jun Akiyama
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Patent number: 5317549Abstract: An information recording and reproducing apparatus employs a magneto-optical disk including a main information recording area wherein plural pieces of main information can be recorded and a TOC area wherein control information related to each piece of main information can be recorded. When a reproducing operation cannot be performed from the TOC area, it is checked whether or not any pieces of control information exist, for example, by detecting an amplitude of a reproduced signal. Or, whether or not a recording or reproducing function of the apparatus works properly may be checked by, for example, a method of test writing and reproduction. As a result, whether or not the magneto-optical disk is a blank disk can be accurately determined. Further, when the disk is determined to be a blank disk, distinctive information indicating a blank disk is recorded in a predetermined portion of the TOC area. Thereafter, upon loading the disk, the disk is promptly determined to be a blank disk.Type: GrantFiled: April 28, 1992Date of Patent: May 31, 1994Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Kunio Kojima
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Patent number: 5315571Abstract: An information recording and reproducing device has a first recording clock generation circuit which generates a clock based on pre-recorded information on a magneto-optical disk, a second recording clock generation circuit and a switching circuit The switching circuit selects a first recording clock when recording information is of discrete information and selects a second recording clock when recording information is of successive information. Moreover, in the present device, a first reading clock is used as well as a second clock as a clock for reading out the reproduced data from the magneto-optical disk, which had been once stored in memory. The second reading clock having a reference frequency is generated by a second clock generation circuit and is used for reading out successive information such as music information.Type: GrantFiled: July 29, 1993Date of Patent: May 24, 1994Assignee: Sharp Kabushiki KaishaInventors: Shigemi Maeda, Kunio Kojima, Jun Akiyama, Shigeo Terashima, Tomiyuki Numata
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Patent number: 5311490Abstract: An optical disk drive which discriminates whether a light spot is incident on a groove or on an area therebetween by eliminating a pulse that appears in a binary envelope signal when the light spot passes a level section. The elimination is carried out based on an ODF section detecting signal, the ODF section detecting signal being a level section detecting signal which is produced by detecting a level section (ODF section) of the optical disk. The detection is carried out by differentiating an envelope signal, which is the envelope of an electric signal corresponding to the amount of light reflected from the optical disk. Accordingly, even if the optical disk in use has interrupted grooves, the optical head can be accurately moved to a desired track located on a land or on a groove.Type: GrantFiled: December 18, 1991Date of Patent: May 10, 1994Assignee: Sharp Kabushiki KaishaInventors: Hirotsugu Matoba, Masaru Nomura, Takeshi Yamaguchi, Kunio Kojima, Shigeo Terashima