Patents by Inventor Kazuo Hakamata
Kazuo Hakamata 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: 7330205Abstract: A photographing method and apparatus for photographing a fluorescent image, composed of fluorescent light emitted by a living tissue that has been illuminated by a stimulating light, as an image having a higher S/N ratio. Fluorescent light emitted by a living tissue that has been illuminated by a stimulating light emitted from a light source and propagated along an endoscope enters an image fiber. The fluorescent light entering the image fiber is propagated along the image fiber to the output face of the image fiber and focused on the light-receiving zone of a photographing element, under photographing conditions set so that the relation between the pixels of aforementioned output face, upon which the fluorescent image is formed, to the pixels receiving the light of the fluorescent image within aforementioned light-receiving zone satisfies the condition expressed by the formula: NfĂ—4>Nd.Type: GrantFiled: April 13, 2004Date of Patent: February 12, 2008Assignee: FUJIFILM CorporationInventor: Kazuo Hakamata
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Patent number: 7281088Abstract: Times at which requests for a data read or data write from/to a logical volume are received are stored in memory as access times of a RAID group making up the logical volume. When a predetermined time has elapsed after the access time, a number of the hard disk drives according to the redundancy of the RAID group are set to a power saving mode. Assume there are first hard disk drives and second hard disk drives having shorter lifes and the RAID group exceeds a predetermined time after the access time. When the RAID group consists of only the first drives, a number of the first drives according to the redundancy of the RAID group are set to a power saving mode and when it consists of only the second drives, an arbitrary number of second drives are set to a power saving mode.Type: GrantFiled: March 31, 2004Date of Patent: October 9, 2007Assignee: Hitachi, Ltd.Inventors: Takashi Yamazaki, Kazuo Hakamata, Azuma Kano
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Publication number: 20070228368Abstract: A functional device having, on a substrate, a pair of electrodes, a functional layer which is sandwiched between the electrodes and has an output that varies in accordance with an applied electric current, and a terminal arranged to apply an electric current to at least one of the electrodes, wherein an insulator is arranged between the electrodes and the density of the insulator decreases as the distance from the terminal increases, or wherein at least one of the electrodes has a notch section, and the ratio of the area of the notch section to the area of the electrode decreases as the distance from the terminal increases. This is an improved functional device which is excellent in production suitability and gives a uniform in-plane output, and can be rendered, in particular, an organic electroluminescence device.Type: ApplicationFiled: March 28, 2007Publication date: October 4, 2007Inventors: Toshiro Takahashi, Kazuo Hakamata
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Publication number: 20070073970Abstract: Times at which requests for a data read or data write from/to a logical volume are received are stored in memory as access times of a RAID group making up the logical volume. When a predetermined time has elapsed after the access time, a number of the hard disk drives according to the redundancy of the RAID group are set to a power saving mode. Assume there are first hard disk drives and second hard disk drives having shorter lifes and the RAID group exceeds a predetermined time after the access time. When the RAID group consists of only the first drives, a number of the first drives according to the redundancy of the RAID group are set to a power saving mode and when it consists of only the second drives, an arbitrary number of second drives are set to a power saving mode.Type: ApplicationFiled: November 27, 2006Publication date: March 29, 2007Inventors: Takashi Yamazaki, Kazuo Hakamata, Azuma Kano
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Patent number: 7193234Abstract: An image information readout exposure apparatus includes: a first light source, for performing readout scanning exposure on an image information recording medium, on which image information is recordable as an electrostatic latent image, to read out image information recorded thereon; and a second light source, for performing scanning exposure on the image information recording medium, which is different from the readout scanning exposure performed by the first light source. The first and second light sources include an integrated illuminating portion and means for scanning the illuminating portion. The first and second light sources may be linear light sources. If so, the illuminating portion may include an optical path changing means, for changing an optical path of light emitted from at least one of the first and second light sources, so that a position illuminated by the first light source and a position illuminated by the second light source substantially match.Type: GrantFiled: June 1, 2004Date of Patent: March 20, 2007Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuo Hakamata
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Patent number: 7184085Abstract: Signal charge that has accumulated in photodiodes of a photoreceptor area in a CCD is multiplied by a charge multiplier and then applied to a floating diffusion amplifier, which has been set to a small conversion coefficient, or to floating gate amplifier, which has been set to a large conversion coefficient. If the accumulated amount of signal charge is small, the charge is converted to a video signal by the floating gate amplifier having the large conversion coefficient. If the accumulated amount of signal charge is large, the charge is converted to a video signal by the floating diffusion amplifier having the small conversion coefficient. Thus a video signal having a high level is obtained even if the amount of signal charge is small. Since it is unnecessary to change driving pulses that are applied to the charge multiplier, the multiplication factor of the charge multiplier will not fluctuate.Type: GrantFiled: August 15, 2002Date of Patent: February 27, 2007Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuo Hakamata, Takashi Shoji
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Patent number: 7176477Abstract: A light irradiating device provided with line light sources is located in association with an image recording medium. The line light sources are located in parallel and at approximately identical pitches with respect to a scanning direction. A slit array plate having slits is located between the image recording medium and the light irradiating device. Each of the slits is located at a position corresponding to the position of one of the line light sources. The light irradiating device is controlled such that line light beams are radiated out one after another with different timing from the line light sources.Type: GrantFiled: October 27, 2004Date of Patent: February 13, 2007Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuo Hakamata
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Publication number: 20070002034Abstract: An image readout apparatus with a panel light source that allows a high yield rate for mounting the panel driver ICs, and enhanced connection reliability for the driver ICs with reduced cost. The panel light source is constituted by a plurality of El blocks arranged side by side, each including a plurality of line electrodes disposed in stripes, and a flat plate electrode disposed opposite to the plurality of line electrodes with an electroluminescence layer interposed between them. Each of the corresponding line electrodes in different EL blocks is electrically connected with each other through a wire. A drive current is applied to the line electrodes of a plurality of EL blocks connected through the wire, and to the flat plate electrode of the EL block to be caused to emit luminescence respectively by two panel driver ICs when causing the panel light source to emit the readout light beam.Type: ApplicationFiled: June 30, 2006Publication date: January 4, 2007Inventor: Kazuo Hakamata
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Patent number: 7135695Abstract: A line light source system includes a line light source formed by a number of linearly arranged light emitting elements. A pair of cylindrical lenses converges the light bundles emitted from the respective light emitting elements in a direction perpendicular to the direction in which the light emitting elements are arranged, and a pinhole array limits the angle of divergence of the light bundles emitted from the respective light emitting elements with respect to the optical axis of the cylindrical lenses in a direction parallel to the direction in which the light emitting elements are arranged.Type: GrantFiled: September 2, 2003Date of Patent: November 14, 2006Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuo Hakamata
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Patent number: 7123756Abstract: A correction function is calculated based on a reference image formed of reflected light reflected upon the irradiation of a predetermined living tissue, for which a diseased state is known, with a reference light. This correction function is employed to administer distance correction on calculated standardized values based on fluorescence images to which an offset has been added, to correct the fluctuations of the calculated standardized values caused by the distance between living tissue and the distal end of a fluorescence endoscope, thereby generating a corrected standardized fluorescence image.Type: GrantFiled: April 26, 2002Date of Patent: October 17, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuo Hakamata, Tomonari Sendai
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Publication number: 20060193073Abstract: A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units, for causing information relating to a logical unit for storing information from the host unit to correspond to information relating to the units. The invention further includes a control unit, when there is no access from the host unit to the logical unit for a predetermined time, for determining the disk units corresponding to the logical unit based on information recorded in the management information recording device and performing power saving of power supply for the disk units.Type: ApplicationFiled: April 20, 2006Publication date: August 31, 2006Inventors: Kazuo Hakamata, Kenichi Takamoto, Masaaki Kobayashi
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Patent number: 7062311Abstract: A fluorescence observing apparatus including a light source for emitting excitation light, an excitation light irradiation section for irradiating the excitation light to a sample, and a fluorescence measurement section for measuring fluorescence emitted from the sample by the irradiation of the excitation light. In the fluorescence observing apparatus, a GaN semiconductor laser is employed as the light source.Type: GrantFiled: July 6, 2000Date of Patent: June 13, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Tomonari Sendai, Katsumi Hayashi, Kazuo Hakamata, Toshiro Hayakawa, Yoji Okazaki, Kenji Matsumoto
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Patent number: 7037259Abstract: A light source device for use in an image capturing device such as an endoscope capable of reducing size and cost, and preventing heat generation at an illuminated position. An illumination unit of the endoscope includes LED light sources for emitting ultraviolet light, fluorescent fibers for generating red, green and blue light respectively by irradiation of the ultraviolet light, a sampling light source, and an excitation light source. Upon capturing a normal image, the ultraviolet light is emitted sequentially from the LED light sources to cause the fluorescent fibers to generate the red, green and blue light. The light of each color is passed through a light guide and irradiated on an observation area of a living body. Thereafter, reflected images attributable to the light of each color are captured with a CCD image capturing element of a charge multiplying type, and captured images are displayed on a monitor.Type: GrantFiled: July 5, 2002Date of Patent: May 2, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuo Hakamata, Masahiro Toida
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Publication number: 20060065865Abstract: Generation of flare components is reduced, and reduction of the amount 6f irradiated readout light is suppressed, in an image readout apparatus. The image readout apparatus is constituted by: an image recording medium, on which image information is recorded; a readout light source formed by electroluminescence elements that emit readout light as line light onto the image recording medium; and an erasing light source formed by electroluminescence elements that emit erasing light of a different frequency from that of the readout light onto the image recording medium to erase the image information therefrom. The readout light source and the erasing light source are integrally formed on a substrate.Type: ApplicationFiled: September 30, 2005Publication date: March 30, 2006Inventor: Kazuo Hakamata
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Patent number: 7008374Abstract: An imaging apparatus using a charge multiplying solid-sate imaging device for use with an endoscope system, etc., capable of providing an output signal with an improved S/N ratio by reducing the dark noise. The full well size of the CCD imaging device is reduced to 1/M of the number of electrons corresponding to a maximum amount of light which may be received by the individual pixel determined by the technical specifications of the system, and the signal charges are read out N times in a prescribed time period corresponding to a time for a single frame in a TV frame rate. The system satisfies the relation, nd (1?1/M)>nr2(N2?1), assuming that nd is the dark noise and nr is the readout noise contained in single reading from a reference solid-state imaging means having a full well size equivalent to the number of electrons described above.Type: GrantFiled: August 29, 2003Date of Patent: March 7, 2006Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuo Hakamata
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Publication number: 20050259345Abstract: A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units, for causing information relating to a logical unit for storing information from the host unit to correspond to information relating to the units. The invention further includes a control unit, when there is no access from the host unit to the logical unit for a predetermined time, for determining the disk units corresponding to the logical unit based on information recorded in the management information recording device and performing power saving of power supply for the disk units.Type: ApplicationFiled: July 18, 2005Publication date: November 24, 2005Inventors: Kazuo Hakamata, Kenichi Takamoto, Masaaki Kobayashi
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Publication number: 20050211933Abstract: An EL layer is located between a linear electrode and an opposite electrode, which stands facing the linear electrode, either one of the linear electrode and the opposite electrode being constituted of a light transmissive electrode. Electric power is supplied across the EL layer, which is located between the linear electrode and the opposite electrode, via the linear electrode and the opposite electrode. An optical intensity of light radiated out from the EL layer, across which the electric power has been supplied, is detected. The electric power, which is supplied across the EL layer, is controlled such that the thus detected optical intensity and a predetermined optical intensity, which has been set previously, become approximately identical with each other.Type: ApplicationFiled: March 23, 2005Publication date: September 29, 2005Inventors: Kazuo Hakamata, Naoto Iwakiri
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Publication number: 20050215861Abstract: In an endoscope system including: a light emission unit emits laser light as illumination light or excitation light; a light guide unit guides the illumination light or the excitation light to an object; and an image pickup unit picks up a normal image formed with reflection light generated by reflection of the illumination light from the object or a fluorescence image emitted from the object in response to the excitation light. The laser light is multiaxial-mode laser light, or the light emission unit includes a plurality of laser-light sources which emit single-axial-mode laser beams having different wavelengths or phases. Alternatively, a vibration unit which vibrates the light guide unit is provided, or a high-frequency signal is superimposed on a driving current of the light emission unit, so that the wavelength of the laser light is shifted among a plurality of values.Type: ApplicationFiled: May 18, 2005Publication date: September 29, 2005Inventor: Kazuo Hakamata
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Patent number: 6947240Abstract: A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units, for causing information relating to a logical unit for storing information from the host unit to correspond to information relating to the units. The invention further includes a control unit, when there is no access from the host unit to the logical unit for a predetermined time, for determining the disk units corresponding to the logical unit based on information recorded in the management information recording device and performing power saving of power supply for the disk units.Type: GrantFiled: April 14, 2003Date of Patent: September 20, 2005Assignee: Hitachi, Ltd.Inventors: Kazuo Hakamata, Kenichi Takamoto, Masaaki Kobayashi
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Patent number: 6930303Abstract: A linear light source has LED chips disposed in an array that provides a higher-intensity light beam with a narrower half-beam width at the converging point. Each of the LED chips is disposed in such a way that its emission regions along a diagonal line are aligned with those of adjacent chips in a straight line. The slit is disposed in such a way that its opening is placed opposite to the emission regions aligned in a straight line. The utilization area is defined by the opening of the slit. The utilization area can include a larger emission region than that of the conventional linear light source so that a higher-intensity light beam with a narrower half-beam width can be obtained at the converging point.Type: GrantFiled: March 24, 2003Date of Patent: August 16, 2005Assignee: Fuji Photo Film Co., Ltd.Inventor: Kazuo Hakamata