Patents by Inventor Makoto Kamiya

Makoto Kamiya 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).

  • Patent number: 5870225
    Abstract: A rear projection type display system with a transmissive screen. A transparent reinforcing plate is coupled to a lenticular sheet of the screen on the light output side by a connective member to broaden the horizontal diverging angle by 60 degrees or more to the right and left sides. The duty factor of a black stripe formed on the lenticular sheet is set to 60% or more so improve the contrast of an image. The diverging angle at each point of a vertically-diffusing lens for diverging light in the vertical direction is modulated in accordance with the height of each point to offer a proper visual angle range in the vertical direction.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: February 9, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Ogino, Yoshiaki Iwahara, Shoji Kuroda, Shuichi Sakamoto, Takashi Itoh, Makoto Kamiya
  • Patent number: 5611611
    Abstract: A rear projection type display system with a transmissive screen. A transparent reinforcing plate is coupled to a lenticular sheet of the screen on the light output side by a connective member to broaden the horizontal diverging angle by 60 degrees or more to the right and left sides. The duty factor of a black stripe formed on the lenticular sheet is set to 60% or more so improve the contrast of an image. The diverging angle at each point of a vertically-diffusing lens for diverging light in the vertical direction is modulated in accordance with the height of each point to offer a proper visual angle range in the vertical direction.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: March 18, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Masanori Ogino, Yoshiaki Iwahara, Shoji Kuroda, Shuichi Sakamoto, Takashi Itoh, Makoto Kamiya
  • Patent number: 5572361
    Abstract: In a telescope, the adjustment order is limited so that dioptric power adjustment is made after adjustment of a distance between a pair of optical systems is completed. A pupil distance and a dioptric power correction amount are stored in a memory for every user. When a user uses the telescope, his or her pupil distance and dioptric power correction amount are read out from the memory to automatically make adjustment.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: November 5, 1996
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Makoto Kamiya, Katsuhito Akagi, Yukio Maekawa, Kazuo Kimura, Yoshiharu Ohta, Haruyuki Nagano, Ichiro Yoshiyama, Masataka Hamada, Kohtaro Hayashi, Keiji Yamazaki
  • Patent number: 5446086
    Abstract: A polyoxymethylene composition which is remarkably improved in heat stability, little stains molds even in long-term continuous molding and little generates formaldehydic stench in molding, and which comprises a polyoxymethylene and, added thereto, 0.01 to 5% by weight of an antioxidant and 0.01 to 10% by weight of a melamine-formaldehyde polycondensate, each based on the polyoxymethylene, characterized in that the melamine-formaldehyde polycondensate used is one which is prepared mainly from melamine and formaldehyde and contains 2.0 to 10 moles of the melamine units on the average per mol of the melamine-formaldehyde polycondensate, wherein the mean mole number of hydrogen bonded to 3 moles of the amino groups contained in 1 mole of melamine is 3.0 moles or above.
    Type: Grant
    Filed: March 9, 1994
    Date of Patent: August 29, 1995
    Assignee: Polyplastics Co., Ltd.
    Inventors: Noriyuki Sugiyama, Hiroyuki Miyaji, Makoto Kamiya, Arisa Chisoku, Kaoru Yamamoto
  • Patent number: 5344911
    Abstract: Processes for producing a polyoxymethylene copolymer includes forming a crude polyoxymethylene copolymer by subjecting a reaction system containing trioxane, a cyclic ether or cyclic formal comonomer, and a catalyst (e.g., boron trifluoride or a coordination compound thereof) to copolymerization reaction conditions. During copolymerization, both the total content of impurities and catalyst in the copolymerization reaction system are adjusted. In this regard, the impurities content (i.e., those compounds which form unstable end groups in the polyoxymethylene copolymer and/or those compounds having a chain-terminating or chain-transfer function) in the copolymerization reaction system is adjusted to 1.times.10.sup.-2 mole percent or less based on the total monomer amount, while the the content of the catalyst in the copolymerization reaction system to between 1.times.10.sup.-3 to 1.times.10.sup.-2 mole percent based on the total monomer amount.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: September 6, 1994
    Assignees: Polyplastics Co., Ltd., Hoechst Aktiengesellschaft
    Inventors: Kaoru Yamamoto, Nagayoshi Maeda, Makoto Kamiya, Toshiro Murao, Gerhard Reuschel, Dietrich Fleischer
  • Patent number: 5313247
    Abstract: A flash device comprising a power source; a main capacitor adapted to be charged by the power source; a flash firing unit operable to consume charge stored in the main capacitor to emit a flash light; a switching unit disposed in a discharge loop for the main capacitor through the flash firing unit; a trigger circuit for exciting the flash firing unit in response to a flash firing command; a pulse output unit, which is operable to output some kinds of pulses, the duty factors of the pulses being different from each other, for inputting a selecting command and for outputting one of the pulses in accordance with the selecting command; and a control unit for causing the switching unit to be switched on and off repeatedly in response to the pulse outputted from the pulse output unit.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: May 17, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Hiroshi Hosomizu, Tsutomu Ichikawa, Makoto Kamiya, Masatoshi Yoneyama, Kenzi Tuzi
  • Patent number: 5311354
    Abstract: In a telescope according to the present invention, defocus amount of an optical system constituting the telescope is calculated; whether or not the defocus amount is within a predetermined in-focus range obtained from a focal point adjusting ability of human eye is discriminated; and when the defocus amount exceeds the in-focus range as a result of the above discrimination, the optical system is driven. The optical system is driven in a shorter time than a time required for removing a defocus by human eye.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: May 10, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Makoto Kamiya, Haruyuki Nagano, Katsuhito Akagi, Masatoshi Yoneyama, Yoshiharu Ohta
  • Patent number: 5235458
    Abstract: A binocular comprising a housing and a pair of first and second optical systems positioned on each side of a central line. Each optical system includes an object lens and ocular lens arranged at a front part and at a rear part of the housing respectively. Further, a light admitting window is placed on the central line between the first and second optical systems for admitting light from an object. A detection module, provided independently of the first and second optical systems is used to output electrical signals which represent the distance to the object. The detection module may include an optical path deflecting means for z-shapely deflecting the light from the light admitting window and for directing the light to a sensor. The binocular is compact and has a hand grip that is designed in order to be holdable and focusable by the use of a single hand.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: August 10, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Katsuhito Akagi, Kazuo Kimura, Haruyuki Nagano, Makoto Kamiya, Masatoshi Yoneyama, Iwao Ishida, Koichi Okumura
  • Patent number: 4951081
    Abstract: A flash device comprising a power source; a main capacitor adapted to be charged by the power source; a flash firing unit operable to consume charge stored in the main capacitor to emit a flash light; a switching unit disposed in a discharge loop for the main capacitor through the flash firing unit; a trigger circuit for exciting the flash firing unit in response to a flash firing command; a pulse output unit, which is operable to output some kinds of pulses, the duty factors of the pulses being different from each other, for inputting a selecting command and for outputting one of the pulses in accordance with the selecting command; and a control unit for causing the switching unit to be switched on and off repeatedly in response to the pulse outputted from the pulse output unit.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: August 21, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Hiroshi Hosomizu, Tsutomu Ichikawa, Makoto Kamiya, Masatoshi Yoneyama, Kenzi Tuzi
  • Patent number: 4935759
    Abstract: A system for controlling an illuminating angle of a flashlight includes a stepping motor by which a relative position between a panel and a reflector is controlled to change the illuminating angle. Further, in setting the illuminating angle, the widest angle is set as the starting point, and whereby an unevenness of exposure is not caused though a sudden photography operation is performed.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: June 19, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kenji Tsuji, Makoto Kamiya
  • Patent number: 4851868
    Abstract: A flash device for use in association with a camera is disclosed. The camera provides focal length data representing a focal length of a lens mounted on the camera to the flash device. The flash device comprises a body portion, a flash head pivotally mounted on the body portion, a xenon tube provided in the flash head for emitting a flash light, and a lens is provided in front of the light emitting means movably to change the angle of the cone of the flash light. A driving circuit, controlled by a microcomputer, is provided for driving the lens in response to the focal length data to set the angle of the cone of the flash light correspondingly to the focal length. A pivot detector is provided for detecting the pivotal movement of the flash head. When the pivotal movement is detected, the microcomputer controls the driving circuit so as not to drive the lens but to maintain the lens, during and after the pivotal movement, in the same position as it was before the pivotal movement.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: July 25, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Keiji Yamazaki, Hiroshi Hosomizu, Makoto Kamiya, Kenji Tsuji
  • Patent number: 4839686
    Abstract: An improved flash device which is characterized in the provision of a power source, a main capacitor adapted to be charged by the power source, a flash firing unit operable to consume charge stored in the main capacitor to emit a flash light, a trigger circuit for exciting the flash firing unit in response to a flash firing command, an insulated gate bipolar transistor disposed in a discharge loop for the main capacitor through the flash firing unit, and a control circuit for applying a voltage to a gate of the insulated gate bipolar transistor in response to the flash firing command and for interrupting the application of the voltage to the insulated gate bipolar transistor in response to a flash terminating command.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: June 13, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Hiroshi Hosomizu, Tsutomu Ichikawa, Makoto Kamiya, Masatoshi Yoneyama, Kenzi Tuzi
  • Patent number: 4743929
    Abstract: A flash device for use in association with a camera is disclosed. The camera provides focal length data representing a focal length of a lens mounted on the camera to the flash device. The flash device comprises a body portion, a flash head pivotally mounted on the body portion, a xenon tube provided in the flash head for emitting a flash light, and a lens is provided in front of the light emitting means movably to change the angle of the cone of the flash light. A driving circuit, controlled by a microcomputer, is provided for driving the lens in response to the focal length data to set the angle of the cone of the flash light correspondingly to the focal length. A pivot detector is provided for detecting the pivotal movement of the flash head. When the pivotal movement is detected, the microcomputer controls the driving circuit so as not to drive the lens but to maintain the lens, during and after the pivotal movement, in the same position as it was before the pivotal movement.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: May 10, 1988
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Keiji Yamazaki, Hiroshi Hosomizu, Makoto Kamiya, Kenji Tsuji
  • Patent number: 4712902
    Abstract: In a device for indicating a camera-to-object distance for flash photography, an electronic flash device receives data from a camera, the data being indicative of a set value of film speed, a set value of exposure to be compensated from a proper exposure and a value of diaphragm aperture to be controlled. The flash device calculates a camera-to-object distance in accordance with the above three data and the limit value of the flash light to be emitted from a light emitter, the camera-to-object distance indicating such an effective object distance that an object at the distance is illuminated with sufficient amount of flash light to effect a desired film exposure corresponding to the exposure compensation value, or an automatic flash available range of the object distance that an object within the range is illuminated by automatically controlled flash light to effect the desired film exposure corresponding to the exposure compensation value.
    Type: Grant
    Filed: January 17, 1986
    Date of Patent: December 15, 1987
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Hiroshi Hosomizu, Kenji Tsuji, Makoto Kamiya
  • Patent number: RE34558
    Abstract: A flash device for use in association with a camera is disclosed. The camera provides focal length data representing a focal length of a lens mounted on the camera to the flash device. The flash device comprises a body portion, a flash head pivotally mounted on the body portion, a xenon tube provided in the flash head for emitting a flash light, and a lens is provided in front of the light emitting means movably to change the angle of the cone of the flash light. A driving circuit, controlled by a microcomputer, is provided for driving the lens in response to the focal length data to set the angle of the cone of the flash light correspondingly to the focal length. A pivot detector is provided for detecting the pivotal movement of the flash head. When the pivotal movement is detected, the microcomputer controls the driving circuit so as not to drive the lens but to maintain the lens, during and after the pivotal movement, in the same position as it was before the pivotal movement.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: March 8, 1994
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Keiji Yamazaki, Hiroshi Hosomizu, Makoto Kamiya, Kenji Tsuji