Patents by Inventor Akira Watanabe

Akira Watanabe 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: 5485203
    Abstract: An encoder decomposes an input color image signal into a luminance signal and color signals, places the color signals in image memories, then fetches color signals of a given screen before and after. A detector calculates differences between the color signals to detect color misregistration either on a pixel basis or a block basis. On the other hand, color signals of a last image acquired before occurrence of color misregistration are stored in frame memories. When color misregistration is detected, a corrector reads the color signals of the last image from the frame memories, and produces correction signals. A counter carries out counting for each difference between color signals of given screens before and after, then detects a distribution of color misregistration of a screen. A selector checks the distribution of color misregistration of a screen to identify the cause of color misregistration, then selectively outputs either the input color image signal or a correction signal sent from the corrector.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: January 16, 1996
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kazunari Nakamura, Kenji Matsunaka, Akira Watanabe
  • Patent number: 5432410
    Abstract: A series circuit of a pass condenser and a neon lamp operate as a voltage detecting device. A resistance voltage dividing circuit has a connecting point between voltage dividing resistances which are connected to the connecting point between the pass condenser and the neon lamp of the voltage detecting device. The series circuit and resistance voltage dividing circuits are provided between a power source boosting circuit and a main condenser so that, when the main condenser has been fully charged, the neon lamp will conduct, causing a charge completion signal to be outputted and thereby the charging operation will be stopped. When the charge voltage of the main condenser is a flash possible voltage, the neon lamp will conduct for only a short time and the charge completion signal will be output accordingly for only a short time in the form of a pulse. The voltage detecting device thus outputs three types of signals over a single output line to indicate one of three possible charging states.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: July 11, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Hiroshi Yamada, Akira Watanabe
  • Patent number: 5420644
    Abstract: In the color smear correcting apparatus of the present invention, the states of a parent picture and son picture of a video signal from a frame sequential imaging apparatus are discriminated and the color smear correction on the parent picture and the color smear correction on the son picture are independently set. Or, in the color smear correcting apparatus of the present invention, whether a moving picture or a still picture is discriminated on a parent picture and son picture of a video signal output from an endoscope apparatus including a frame sequential imaging apparatus and the color smear correction on the parent picture and the color smear correction on the son picture are independently set.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: May 30, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Akira Watanabe
  • Patent number: 5408263
    Abstract: An electronic endoscope apparatus has an arrangement that its discrimination circuit discriminates the type or the operational state of the light source in accordance with a discrimination signal transmitted from a discrimination signal generator, and in accordance with the result of the discrimination, the processing operation to be performed by its video signal processing circuit is changed over to correspond to the difference in the type or the operational state of the light source. The video signal processing circuit performs a proper signal processing operation to correspond to the difference in the type of the light source to prevent deterioration in the image quality. The electronic endoscope apparatus is structured so that a different type light source can be adaptably connected to it.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: April 18, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kenichi Kikuchi, Akira Watanabe, Masaki Terakubo, Takehiro Nakagawa, Yasuo Komatsu
  • Patent number: 5403644
    Abstract: A fabric to be utilized in making a textile product is prepared in the steps comprising: embroidering a natural fabric along the predetermined cutting line and/or patterns with thermofusing fibers; and melt cutting and/or pressingly welding along said embroidered portions with a supersonic treating machine to provide frayless edge portions and/or openings as well as hollow patterns. Another fabric is prepared in the steps comprising: providing at least one surface of a natural fabric with a thermofusing fabric; and melt-cutting and/or pressingly welding along the predetermined cutting line and/or patterns with a supersonic treating machine.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: April 4, 1995
    Assignee: Mitsuo Fujisawa
    Inventors: Mitsuo Fujisawa, Akira Watanabe
  • Patent number: 5390130
    Abstract: A CPU checks whether a content of a battery insertion detecting RAM has a predetermined bit configuration and whether a flag during battery check is set after power on reset. If neither the RAM has the bit configuration nor the flag is set, the flag is set and then a dummy current is caused to flow into a dummy load. When power consumption is high, the power supply voltage greatly drops within a predetermined period of time after the dummy load is turned on and therefore the voltage sensing IC detects the voltage drop and the CPU is reset. Since the CPU initializes all ports if it is subjected to hard reset, the current is stopped to flow into the dummy load and the power supply voltage is recovered. After the hard reset, the CPU checks the content of the RAM and the flag. Since the flag continues to be set, the CPU determines that the battery runs down and performs a battery run-down operation. When the battery is loaded, the RAM usually has a predetermined bit configuration.
    Type: Grant
    Filed: November 18, 1991
    Date of Patent: February 14, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Akira Watanabe, Atsushi Maruyama, Touko Kobayashi, Azuma Miyazawa
  • Patent number: 5333010
    Abstract: The present invention provides a color misregistration easing system for inputting a color image signal of a subject imaged by a field sequential type imaging device and carrying out color misregistration easing.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: July 26, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kazunari Nakamura, Kenji Matsunaka, Akira Watanabe
  • Patent number: 5314762
    Abstract: The present invention provides a portable power source comprising a fuel cell generating electricity using hydrogen as fuel, a hydrogen storage unit filled with hydrogen absorbing alloy for supplying hydrogen to the fuel cell, a case enclosing the fuel cell and hydrogen storage unit, and a lid for sealing a part of the case when the portable power source is not in use, wherein the lid seals a surface of the case on which at least one air inlet for taking in the air necessary for the fuel cell to generate electricity and a reactant gas outlet for exhausting reactant gas produced by the generation of electricity are formed.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: May 24, 1994
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Akira Hamada, Nobuyoshi Nishizawa, Hiroshi Mukai, Isao Furukawa, Takashi Oda, Akira Watanabe, Takaaki Matsubayashi
  • Patent number: 5313233
    Abstract: An image forming apparatus wherein a laser beam produced by a laser source is imaged through an imaging optical system on an image bearing member as a beam spot. The beam spot scans the image bearing member in a main scan direction. The laser source is rendered on and off to form an image with picture elements. The laser driving pulse width per picture element is changed in accordance with the image density of the image to be formed, so that the tone gradation of the image is provided on the image bearing member in accordance with the pulse width. The size of the spot measured in the main scan direction (1/e.sup.2 diameter) is not more than 0.7 times of the size of the picture element measured in the main scan direction.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: May 17, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Nagase, Yuji Sakemi, Akira Watanabe, Masahiro Itoh, Kenichi Takeda, Kazuhisa Kemmochi
  • Patent number: 5303082
    Abstract: A stereomicroscope comprising a pair of observation systems each comprising an objective lens and an eyepiece lens, a pair of light sources disposed above the objective lens for emitting a pair of light beams through a pair of beam splitters into the observation systems coaxially therewith, pairs of polarizers disposed on the side of the eyepiece lenses and the side of the light sources respectively so as to have polarizing surfaces perpendicular to each other, a quarter wavelength plate interposed between the objective lens and a sample to be observed, and a pair of light beam deflecting members disposed between the beam splitters and the objective lens.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: April 12, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Hideki Obuchi, Akira Watanabe, Shinichi Dosaka
  • Patent number: 5298929
    Abstract: The present invention provides a camera for selectively supporting a film having perforations along its upper and lower edges and a film not having the perforations, comprising masking plates for photographic screen size setting that are installed in a camera body to be freely movable to positions at least between the inside and outside of perforations, a perforation detector for determining whether perforations are present on the edges of at least the photographic screens of a film loaded in a camera body, and a masking plate drive for receiving an output of the perforation detector, moving the masking plates to a screen size setting inside of perforations when a film is perforated, and moving the masking plates to a screen size setting including a portion corresponding to the perforations when a film is imperforated.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: March 29, 1994
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Katsuhiko Tsunefuji, Masaki Tokui, Sumio Kawai, Akira Watanabe, Koji Suzuki
  • Patent number: 5294967
    Abstract: A developing apparatus having a supporting frame for supporting plural developing units. The supporting frame is movable to present a selected one of the developing units to a development operating position. The supporting frame is provided with positioning members for positioning the developing units. The positioning members are fixed on the movable frame in the manner that the position of the positioning member is adjustable. Each of the developing units is faced to an image bearing member at the operating position without contact to the image bearing member.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: March 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Munakata, Masahiro Itoh, Akira Watanabe, Yuji Sakemi
  • Patent number: 5287148
    Abstract: A developing apparatus for developing electrostatic images comprises a container for containing a developer comprising magnetic material. A rotatable member is provided which is rotatable in the container in contact with the developer, the rotatable member being supported on bearings. A stationary magnetic member is disposed out of position inside the container and adjacent to the bearing with a clearance from the rotatable member, the stationary member enclosing the rotatable member. The stationary member has first and second magnetic poles disposed adjacent to each other and having the same magnetic polarity to form a repelling magnetic field to form a magnetic brush of the developer in a clearance between the magnetic member and the rotatable member.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: February 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuji Sakemi, Masahiro Itoh, Akira Watanabe
  • Patent number: 5267007
    Abstract: A developing apparatus is provided with a container for containing a developer having magnetic particles. A rotatable member is rotatable in contact with the developer in the container. The rotatable member is supported in the container by a bearing. A magnetic member encloses at least a portion of the rotatable member at a position adjacent to the bearing. The rotatable member comprises a ferromagnetic material disposed at least at a portion facing the magnetic member. The ferromagnetic material is magnetized by the magnetic member, and a magnetic field formed between the magnetic member and the ferromagnetic material forms a magnetic brush of the developer between the magnet member and the rotatable member.
    Type: Grant
    Filed: August 3, 1990
    Date of Patent: November 30, 1993
    Inventors: Akira Watanabe, Yuji Sakemi, Masahiro Itoh
  • Patent number: 5249022
    Abstract: The present invention provides an image forming apparatus including an image bearing member; image forming devices for forming a toner image on the image bearing member, the average volume particle diameter of the toner being 3-10 .mu.m; a movable transfer sheet bearing member for bearing a transfer sheet; and a transfer member for transferring the toner image formed on the image bearing member onto the transfer sheet carried by the transfer sheet bearing member at a transfer station. The transfer member includes a fiber brush engageable by the transfer sheet bearing means at a side opposite to the image bearing member at the transfer station.
    Type: Grant
    Filed: November 21, 1992
    Date of Patent: September 28, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Watanabe, Tatsuo Takeuchi, Kenichiro Waki, Yasushi Miura, Takeo Tsunemi
  • Patent number: 5247620
    Abstract: A bridge apparatus for interconnecting networks in which at least two networks including a plurality of stations are connected, and which, when a transmission frame including an identifier of one station and an identifier of another station of a destination is received from the one station, forwards the transmission frame to a network to which the another station belongs based on the identifier of another station. A processor of the bridge apparatus for interconnecting networks performs delivery control of the transmission frame using an information which has been read out of an address check circuit for identifying the network to which the another station belongs with the identifier of the another station which is included in the transmission frame.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: September 21, 1993
    Assignees: Hitachi, Ltd., Hitachi Cable Ltd.
    Inventors: Junji Fukuzawa, Akira Watanabe, Matsuaki Terada, Sadao Mizokawa
  • Patent number: 5218603
    Abstract: A communications method for a local area network system including a trunk local area network (1); a plurality of node units (N) provided on the trunk local area network and having a terminal table (TB); a branch local area network (2) connected to each of the node units; and a terminal device (T) connected to the branch local area network, which comprises the steps of comparing a group number of a frame received by the node unit from the trunk area network with a group number of its own to produce a first result and comparing a source address (SA) of the frame with an address stored in the terminal table to produce a second result; and erasing or transferring the frame between the node units based on the first and second results, thereby controlling communications between the terminal devices.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: June 8, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Akira Watanabe
  • Patent number: 5192968
    Abstract: A photometer of a camera employs a MOS-type CPU having an open drain type transistor whose drain serving as an output terminal, a CMOS input terminal, and an input gate inverting an input with a value exceeding a predetermined potential. In the photometer, the transistor is set in a high-impedance state, thereby releasing a charge accumulated in a parasitic capacitor of a photodiode for generating a photoelectric current corresponding to an incident light amount. Thus, a voltage at the CPU terminal gradually increases, and, when it exceeds a threshold of a Schmitt inverter, the output of the Schmitt inverter is inverted. The time period from when the transistor is set in the high-impedance state to when the output of the Schmitt inverter is inverted is proportional to the photoelectric current. By measuring the time period, the photoelectric current value or luminance is detected.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: March 9, 1993
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Kenichi Kishida, Atsushi Maruyama, Akira Watanabe
  • Patent number: 5189354
    Abstract: A permanent magnet rotor is connected to an output shaft and has more than one pair of magnetic poles. A stator has three phases connected in Y-connection including a first phase, a second phase, and a third phase. Each phase has as many series-connected coils as there are pairs of the poles of the magnet rotor. A timer circuit outputs a first signal for a predetermined length of time when a target angular position of said rotor is selected. On the basis of a present angular position of the rotor and the target angular position of the rotor, a rotation direction commanding circuit outputs a second signal indicative of the rotation direction of rotor. In accordance with the signal, a current polarity control circuit supplies a first current to the first phase (subcoils) in accordance with the first signal and a second current to the second and third phases (main coils) in accordance with the second signal so as to drive the rotor into rotation to the target angular position.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: February 23, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tsutomu Tominaga, Akira Watanabe
  • Patent number: 5177536
    Abstract: A developing apparatus is provided with a container for accommodating a developer for containing magnetic particles, and a rotatable carrying member is disposed at least partly in the container and faces an image bearing member at a developing station. The rotatable developer carrying member carries the developer thereon to the developing position. A magnet is disposed in the developing carrying member and includes a plurality of magnets for conveying the developer. A magnetic member is disposed close to the circumferential surface of the developer carrying member and in a circumferential direction of the developing carrying member in a region thereof where the developer carrying member is disposed in the developer container, adjacent to a longitudinal end of the developer carrying member.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: January 5, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Watanabe, Masahiro Itoh, Yuji Sakemi, Hiroshi Satomura