Patents by Inventor Hiroyashu Murakami

Hiroyashu Murakami 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: 4664496
    Abstract: Most of the elements constituting this camera system consists of digital circuits, whereby a central processing unit is built in this camera system in such a manner that various kinds of photographic modes are possible without increasing the number of the elements.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: May 12, 1987
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiko Shinoda, Nobuaki Sakurada, Masaharu Kawamura, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4512656
    Abstract: Most of the elements constituting this camera system consists of digital circuits, whereby a central processing unit is built in this camera system in such a manner that various kinds of photographic modes are possible without increasing the number of the elements.
    Type: Grant
    Filed: December 11, 1980
    Date of Patent: April 23, 1985
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiko Shinoda, Nobuaki Sakurada, Masaharu Kawamura, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4364647
    Abstract: The present invention relates to a control device for camera, so designed as to sequentially control the photographing period, the release time and the release frequency in an automatic way and to print the data information on the film. The eventual abrupt change of photographic conditions is detected so as to carry out the releasing independently of the sequential control, stopping the sequential control and automatically controlling the starting time or the determination time of the sequential control.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: December 21, 1982
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaharu Kawamura, Nobuaki Sakurada, Nobuhiko Shinoda, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4304482
    Abstract: A photographing information setting device of such system that a pulse generation means is provided and photographing information is set by pulses generated by opening and closing of a switch, being characterized by that a switch to place a photographing information setting circuit thereof in an activated state and a switch for photographing information setting are simultaneously handled by a single handling member.
    Type: Grant
    Filed: February 2, 1979
    Date of Patent: December 8, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masayuki Suzuki, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4304472
    Abstract: In the disclosed photographic exposure control system, an exposure mechanism generates at least one controllable exposure parameter for regulating the exposure of a photosensitive material. A coding circuit is set to produce digital signals corresponding to at least one photographic value. A control device between the coding circuit and the exposure mechanism calculates the exposure parameter and controls the coding circuit. The coded values are then suitably displayed to the photographer.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: December 8, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiko Shinoda, Nobuaki Sakurada, Masaharu Kamamura, Tadashi Ito, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4297018
    Abstract: A printed circuit unit for a camera, comprisinga photo-sensing means to measure brightness of an object,an integrated exposure operation circuit means to conduct exposure operation based on the photo-sensing output from said photo-sensing means and other exposure factors for determining a proper exposure value, (an exposure time value or an exposure aperture value),an electro-optical display means to digitally display in an optical manner the exposure value (the exposure time value and/or the exposure aperture value) within a field of view finder of the camera, anda flexible printed circuit sheet having electrically conductive paths to electrically connect said photo-sensing means and said display means to said exposure operation circuit means,and in said printed circuit unit, said photo-sensing means, said display means and said integrated exposure operation circuit means are mounted on said flexible printed circuit sheet, and an opening is formed at a part of said printed circuit sheet to allow the image li
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: October 27, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyashu Murakami, Tadashi Ito, Fumio Ito
  • Patent number: 4194819
    Abstract: The present invention relates to a camera so designed that the aperture preset mechanism as well as the aperture adjusting mechanism at the side of the camera body are operative by means of the first urging mechanism provided in the lens barrel. The aperture adjusting mechanism is operated by means of the release operation of the camera so as to close the aperture preset mechanism down to a certain determined aperture value. Between the aperture adjusting mechanism and the aperture preset mechanism an intermediary member and the second urging mechanism are provided. By means of operating the focus depth confirmation member, the aperture preset mechanism is closed down to a certain determined aperture value through the intermediary member. The camera is brought into the state ready for taking a picture by means of the second urging mechanism upon releasing the focus depth confirmation operation.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: March 25, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Fumio Ito, Masayuki Suzuki, Hiroyashu Murakami, Nobuaki Date, Tadashi Ito, Akio Sunouchi
  • Patent number: 4191458
    Abstract: In the disclosed photographic display circuit, a counter counts pulses from a pulse generator and the exposure information to be entered is stepped while the content of the counter and that of the light measuring circuit are used to obtain an exposure value. When the data is being entered only the entered data is displayed. After entry, the resulting exposure data is displayed.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: March 4, 1980
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaharu Kawamura, Nobuaki Sakurada, Nobuhiko Shinoda, Fumio Ito, Hiroyashu Murakami, Tadashi Ito
  • Patent number: 4175842
    Abstract: The present invention relates to an exposure control system for a camera with both priority modes in which the photographic information of either the shutter time or the aperture value and the photographic information including the measured value of the brightness of the object to be photographed are processed so as to obtain a proper exposure value. The system is characterized in that either an optional shutter time or an optional aperture value is set by a common set means, for example, a dial in such a manner that the output of the set means is put in the operation means so as to control the exposure amount. Further, the condition showing whether the value set by the common set means is the aperture value or the shutter value is clearly indicated.
    Type: Grant
    Filed: January 4, 1978
    Date of Patent: November 27, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuaki Sakurada, Tadashi Ito, Nobuhiko Shinoda, Fumio Ito, Hiroyashu Murakami, Masaharu Kawamura
  • Patent number: 4175848
    Abstract: An apparatus for providing a digital display representative of photographic information which is visible in the viewfinder of a camera. Since the photographic information is comprised of a number of factors, a number of symbols or signs are displayed in association with the digital display so that the photographer can identify multidigit numbers displayed. The structure of the digital display is simplified by using an arrangement of connections between display and display driver which allows for further reduction in size of the camera.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: November 27, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyashu Murakami, Tadashi Ito, Fumio Ito, Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda
  • Patent number: 4167312
    Abstract: A camera exposure control circuit performs exposure control and a series of photographic functions digitally by means of digital operation process circuits and a sequence control circuit. In the sequence control circuit a random logic circuit is used to control the camera in an efficient way and to minimize the number of the components of the camera itself.
    Type: Grant
    Filed: March 21, 1978
    Date of Patent: September 11, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuhiko Shinoda, Nobuaki Sakurada, Masaharu Kawamura, Tadashi Ito, Hiroyashu Murakami, Fumio Ito
  • Patent number: 4165929
    Abstract: An automatic camera being simple in handling and composition and provided with an accessory selectively mounted on the camera body or with an aperture value setting information device mounted on the camera body, so that the camera operation may select either the shutter time priority mode or the aperture value priority mode.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: August 28, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Fumio Ito, Yukio Mashimo, Masayoshi Yamamichi, Masami Shimizu, Hiroyashu Murakami, Tadashi Ito
  • Patent number: 4162839
    Abstract: In the camera disclosed, depending upon whether the shutter preference or aperture preference mode is selected, a computer establishes a computed value on the basis of a preset value and other ambient conditions. A number of separate comparators compare the respective values to a single reference wave form and turn off respective gates when the analog voltages achieve predetermined relationships to the reference wave form. The gates passed pulses from a common source from the beginning of the reference wave form until the respective gates are shut off. The values are thus digitized and displayed within the camera.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: July 31, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Mashimo, Nobuaki Sakurada, Tadashi Ito, Fumio Ito, Nobuhiko Shinoda, Hiroyashu Murakami
  • Patent number: 4134654
    Abstract: A printed circuit unit for a camera, comprisingA photo-sensing means to measure brightness of an object,An integrated exposure operation circuit means to conduct exposure operation based on the photo-sensing output from said photo-sensing means and other exposure factors for determining a proper exposure value (an exposure time value or an exposure aperture value),An electro-optical display means to digitally display in an optical manner the exposure value (the exposure time value and/or the exposure aperture value) within a field of view finder of the camera, andA flexible printed circuit sheet having electrically conductive paths to electrically connect said photo-sensing means and said display means to said exposure operation circuit means,And in said printed circuit unit, said photo-sensing means, said display means and said integrated exposure operation circuit means are mounted on said flexible printed circuit sheet, and an opening is formed at a part of said printed circuit sheet to allow the image lig
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: January 16, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyashu Murakami, Tadashi Ito, Fumio Ito, Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda
  • Patent number: 4118716
    Abstract: A photographing mode selection device for a camera permitting selection of either a shutter speed preference photographing mode or a lens stop preference photographing mode as desired. To ensure excellent operability for photographing mode selection, the device has a swing lever provided coaxially with a shutter release button or a slide lever which is provided at a position close to the release button in such a way as to permit quick operation with a thumb.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: October 3, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masayuki Suzuki, Nobuaki Sakurada, Tadashi Ito, Masayoshi Yamamichi, Hiroyashu Murakami
  • Patent number: 4118713
    Abstract: At the side of the camera body, switches for treating the totally opened F value information of the photographic lens as coded digital information of a certain determined number of bits are connected to the digital exposure operation circuit. At the side of each of the photographic lens which is made interchangeable for the camera body, a signal pin is arranged for indicating the totally opened F value proper to the photographic lens as coded digital information of the above mentioned determined number of bits in such a manner that at the time of mounting the photographic lens on the camera body, the switches at the side of the camera body are closed in selected combination in accordance with the totally opened F value of the lens. Accordingly the totally opened F value of the photographic lens is put into the digital exposure operation circuit.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: October 3, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyashu Murakami, Tadashi Ito, Fumio Ito, Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda
  • Patent number: 4103308
    Abstract: A plural number of switches which are selectively opened and closed comprise a first switch corresponding with the weight "2/3" in APEX value and a second switch corresponding with the weight "1/3" in APEX value while a n bit register comprises a first bit with the weight "1/2" in APEX value, a second bit with the weight "1/4" in APEX value and a third bit with the weight "1/8" in APEX value. The closing signal of the first switch is put in the first bit, the closing signal of the second switch in the second bit and the closing signal of the third switch in the third bit so as to carry out the approximate conversion of the data.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: July 25, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda, Tadashi Ito, Hiroyashu Murakami, Fumio Ito
  • Patent number: 4089010
    Abstract: A photographing information display circuit for a camera which performs digital computation of information relative to exposure, etc. and displays the computed digital values. The display of the digital value computed is effected through an analog display circuit such as a meter circuit by an extremely simplified circuit arrangement, without using any D-A conversion circuit such as a ladder circuit or the like. The invented display circuit arrangement minimizes the electric power requirement for display to solve the problem of electric power consumption for display in small-sized camera.
    Type: Grant
    Filed: September 30, 1976
    Date of Patent: May 9, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tadashi Ito, Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda, Fumio Ito, Hiroyashu Murakami
  • Patent number: 4081813
    Abstract: An apparatus for setting an exposure control factor into a camera in the form of a digital signal without using a code plate or a plurality of switches. A pulse train is fed to a binary counter through an AND circuit which, upon selective receipt of gating-on and gating-off signals, operates to initiate and terminate flow of pulses therethrough respectively. When the counter has counted the selected number of pulses, the photographer who is viewing a digital display unit cooperative with the counter to detect this pulse number may actuate a button to produce the gating-off signal, thereby a corresponding desired value of the exposure control factor is set into the camera as a function of the number of pulses counted.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: March 28, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaharu Kawamura, Nobuaki Sakurada, Tadashi Ito, Hiroyashu Murakami, Fumio Ito, Nobuhiko Shinoda
  • Patent number: 4079386
    Abstract: The present invention relates to a camera with a displacement means for controlling the exposure amount as the function of the mechanical displacement position. The displacement means are so designed that a brush is slid over a comb-shaped conductive pattern mechanically linked with the displacement means so as to convert the displacement position of the displacement means into a pulse number.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: March 14, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyashu Murakami, Tadashi Ito, Fumio Ito, Nobuaki Sakurada, Masaharu Kawamura, Nobuhiko Shinoda