Patents by Inventor Hiroshi Hosomizu

Hiroshi Hosomizu 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: 6009281
    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: April 4, 1994
    Date of Patent: December 28, 1999
    Assignee: Minolta Co., Ltd.
    Inventors: Hiroshi Hosomizu, Tsutomu Ichikawa, Makoto Kamiya, Masatoshi Yoneyama, Kenzi Tuzi
  • 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: 5272500
    Abstract: A flash photographing system includes a camera body, a flash controller connected to the camera body and three flash devices: the first flash device is directly mounted on the camera body; the second flash device is mounted on the flash controller; and the third flash device is connected through a suitable cord to the flash controller. A microcomputer is provided in the camera body and also in each of the flash devices so as to control the three flash devices in various different modes of operations, such as simultaneous flash mode, sequence flash mode, and yet providing an appropriate amount of light for the proper exposure.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: December 21, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Nakai
  • Patent number: 5089834
    Abstract: A mounting device on a camera has a mounting member to fit with an accessory so as to mount the accessory on the camera by sliding it. The mounting member which is molded out of plastic in one piece has eaves-like portions overhanging from an upper portion thereof in opposite directions intersecting perpendicularly to a mounting direction of the accessory, thus having a generally T-shaped cross section. The mounting member has a groove running in the mounting direction at a top central portion for receiving a projecting portion of the accessory so as to determine a horizontal (lateral) position of the accessory relative to the camera. The eaves-like portions receive mating members of the accessory thereunder so as to determine a vertical position of the accessory relative to the camera.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: February 18, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Masayuki Nakasa, Norio Ishikawa, Hiroshi Hosomizu, Tatsuro Izumi, Keiji Yamazaki, Yukio Miki, Mamoru Katsuragi
  • Patent number: 5016037
    Abstract: A flash photographing system includes a camera body, a flash controller connected to the camera body and three flash devices: the first flash device is directly mounted on the camera body; the second flash device is mounted on the flash controller; and the third flash device is connected through a suitable cord to the flash controller. A microcomputer is provided in the camera body and also in each of the flash devices so as to control the three flash devices in various different modes of operations, such as simultaneous flash mode, sequence flash mode, and yet providing an appropriate amount of light for the proper exposure.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: May 14, 1991
    Assignee: Minolta Camera Co., Ltd.
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Nakai
  • Patent number: 4963914
    Abstract: A flash photographing system includes a camera body, a flash controller connected to the camera body and three flash devices: the first flash device is directly mounted on the camera body; the second flash device is mounted on the flash controller; and the third flash device is connected through a suitable cord to the flash controller. A microcomputer is provided in the camera body and also in each of the flash devices so as to control the three flash devices in various different modes of operations, such as simultaneous flash mode, sequence flash mode, and yet providing an appropriate amount of light for the proper exposure.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: October 16, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Makai
  • Patent number: 4961083
    Abstract: An accessory shoe for mounting an electronic flash device on a camera, which is provided at a top portion of the camera and has a plurality of terminals for circuitry of the camera arrayed in a direction in which the electronic flash device is inserted into the accessory shoe. Of the plurality of terminals, a terminal which leads to an X contact and outputs a signal indicative of a situation of the X contact is located at a position closest to an insertion opening of the accessory shoe and is connected to a terminal on an electronic flash device for inputting the signal at the end of a mounting procedure of the electronic flash device.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: October 2, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Masayuki Nakasa, Norio Ishikawa, Hiroshi Hosomizu
  • 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: 4939534
    Abstract: A flash photography system which comprises a photographic camera and an electronic flash device;said photographic camera comprisingaperture value output means for producing aperture value under the flash light photographing,flash light stop signal output means for integrating output value of a light value of a photographing object and for producing a signal for stopping emission of a flash light when the integrated value reaches a predetermined value,said flash device comprisingcalculating means for calculating a maximum photographing distance which is covered by the flash light for effecting a correct exposure on the photographing object on the basis of a maximum light value of the flash light and the aperture value fed from the aperture value output means, anddisplay means for displaying the maximum photographing distance on the basis of the output of the calculating means.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: July 3, 1990
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Masaaki Nakai, Takanobu Omaki, Hiroshi Hosomizu, Masatake Niwa, Toru Inoue, Minoru Sekida
  • Patent number: 4870438
    Abstract: A flash photographing system includes a camera body, a flash controller connected to the camera body and three flash devices: the first flash device is directly mounted on the camera body; the second flash device is mounted on the flash controller; and the third flash device is connected through a suitable cord to the flash controller. A microcomputer is provided in the camera body and also in each of the flash devices so as to control the three flash devices in various different modes of operations, such as simultaneous flash mode, sequence flash mode, and yet providing an appropriate amount of light for the proper exposure.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: September 26, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Nakai
  • 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: 4839687
    Abstract: A flash photography system which comprises a photographic camera and an electronic flash device;said photographic camera comprisingaperture value output means for producing aperture value under the flash light photographing,flash light stop signal output means for integrating output value of a light value of a photographing object and for producing a signal for stopping emission of a flash light when the integrated value reaches a predetermined value,said flash device comprisingcalculating means for calculating a maximum photographing distance which is covered by the flash light for effecting a correct exposure on the photographing object on the basis of a maximum light value of the flash light and the aperture value fed from the aperture value output means, anddisplay means for displaying the maximum photographing distance on the basis of the output of the calculating means.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: June 13, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Masaaki Nakai, Takanobu Omaki, Hiroshi Hosomizu, Masatake Niwa, Toru Inoue, Minoru Sekida
  • Patent number: 4816854
    Abstract: A close-range lighting flash device comprising an electronic flash unit including a plurality of xenon tubes, an illuminator unit provided integrally in the flash unit and including a plurality of illuminator lamps, a light-transmitting panel arranged in front of both of the xenon tubes and the illuminator lamps, and a control device for energizing the illuminator unit. The light-transmitting panel has first and second portions aligned respectively with the xenon tubes and the illuminator lamps, the second portions having a light diffusing density smaller than that of the first portions.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: March 28, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Kenji Tsuji, Tsutomu Ichikawa, Hiroshi Hosomizu
  • Patent number: 4797702
    Abstract: A flash photography system with a camera body and an electronic flash device incorporates first to third terminals in the camera body which are connectable to fourth through sixth terminals in the flash device. A signal is produced to distinguish between first and second modes wherein data is transmitted to the electronic flash device and data from the electronic flash device is transmitted to the camera body, respectively, and connected to the first terminal. Clock pulses control the data transmission and data is read from the electronic flash device and transmitted to the electronic flash device through the second terminal in response to the clock pulses. An initiating signal to cause production of artificial illuminating light from the electronic flash device is provided at the third terminal. In response to the distinguishing signal, selection is made between the first and second modes via the fourth terminal.
    Type: Grant
    Filed: February 18, 1987
    Date of Patent: January 10, 1989
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Nakai
  • Patent number: 4755845
    Abstract: A flash photography system for a photographic camera and a flash device adapted to be connected thereto with the camera providing an aperture value output for flash light photography and a flash light stop signal obtained from an integrated output of the light reflected from a photographic object to terminate flash light emission when the integrated value reaches a predetermined value. The flash device calculates a maximum photographing distance covered by the flash light for effecting a correct exposure of the photographic object from the maximum flash light value and the aperture value from the camera. The maximum photographing distance is displayed by a suitable display visible to the camera operator.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: July 5, 1988
    Assignee: Minolta Camera KK
    Inventors: Nobuyuki Taniguchi, Masaaki Nakai, Takanobu Omaki, Hiroshi Hosomizu, Masatake Niwa, Toru Inoue, Minoru Sekida
  • 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: 4573786
    Abstract: A flash photographing system includes a camera body, a flash controller connected to the camera body and three flash devices: the first flash device is directly mounted on the camera body; the second flash device is mounted on the flash controller; and the third flash device is connected through a suitable cord to the flash controller. A microcomputer is provided in the camera body and also in each of the flash devices so as to control the three flash devices in various different modes of operations, such as simultaneous flash mode, sequence flash mode, and yet providing an appropriate amount of light for the proper exposure.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: March 4, 1986
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Nobuyuki Taniguchi, Hiroshi Hosomizu, Kenji Tsuji, Takanobu Omaki, Masaaki Nakai
  • 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