Patents by Inventor Shintaro Nakagaki

Shintaro Nakagaki 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: 5237345
    Abstract: A charge image information transferring apparatus includes a recording member having a charge latent image; a photo-modulation member; a device for moving the recording member and the photo-modulation member relative to each other; and a device for transferring information, represented by the charge latent image. from the recording member to the photo-modulation member. An electric field of the charge latent image is applied to the photo-modulation member when a distance between the recording member and the photo-modulation member becomes equal to or smaller than a predetermined distance. The applied electric field has a magnitude which exceeds a threshold value with respect to a change in a condition of the photo-modulation member.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: August 17, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yuji Uchiyama
  • Patent number: 5233427
    Abstract: An apparatus for reproducing a charge latent image prerecorded on a charge holding layer of a recording medium as a series of frames aligned in a line. The apparatus contains a reproducing head means composed of an electrode without a photo-modulation layer, an enabling means enabling the reproducing head means to reproduce a charge latent image only when the reproducing head confronts a charge latent image. The enabling means displaces the series of frames of charge latent image intermittently to align one of the series of frames with the reproducing head means.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: August 3, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Tsutou Asakura, Masato Furuya, Tetsuji Suzuki
  • Patent number: 5227885
    Abstract: A charge latent image recording medium includes an electrode, a dielectric member, a member suppressing a transfer of charges, and a photoconductive member laminated in the order without any gaps therebetween. A system for reading a charge latent image recorded in a recording member includes means for projecting a first electromagnetic radiation beam along a path extending to the recording member, means projecting a second electromagnetic radiation beam approximately along the path for reading the charge latent image, guiding means disposed in the path changing electric resistance thereof along the path threthrough, in response to the first electromagnetic radiation beam projected thereto, for guiding an electric field of charges of the charge latent iamge.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: July 13, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Tsutou Asakura, Masato Furuya, Hiromichi Tai
  • Patent number: 5227902
    Abstract: A spatial light modulator which includes a light modulation layer which is interposed between two photoconductive layers and laminated to both layers; the two photo conductive layers have charge images written thereon, respectively, by illumination of a writing light carrying optical information; the illumination direction of the writing light to the photoconductive layers are different from each other; and the two photoconductive layers permit the reading light to pass therethrough. When illuminated by a reading light via either of the first or second photoconductive layers, the light modulation layer optically modulates the reading light in accordance with the first and second charge images, under the presence of a voltage applied to the modulator. Thus it reads read out the first information and second information. The first and second photoconductive layers permit the reading light to pass therethrough.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: July 13, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Ichiro Negishi, Tetsuji Suzuki, Fujiko Tatsumi, Ryusaku Takahashi, Keiichi Maeno
  • Patent number: 5214457
    Abstract: An overhead projector for projecting an image onto a screen includes a light-to-light converter for recording an image therein and reproducing the recorded image therefrom. A first light source applies first light to read an image from a subject copy and record the image in the light-to-light converter under a first light applying condition. A second light source applies second light to reproduce the recorded image from the light-to-light converter and project the reproduced image onto a screen under a second light applying condition independent of the first light applying condition.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: May 25, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yoshihisa Koyama, Yuji Uchiyama
  • Patent number: 5196925
    Abstract: A charge latent image is formed on a recording medium in response to information and a reference pattern so that the information and the reference pattern are recorded on the recording medium. During a reproducing process, the information is read out from the recording medium and an information signal representing the readout information is generated. In addition, the reference pattern is read out from the recording medium and a reference signal representing the reference pattern is generated. The information is demodulated from the information signal. The reference signal is used in the demodulation of the information from the information signal.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: March 23, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Tsutou Asakura, Masato Furuya, Hiromichi Tai
  • Patent number: 5191408
    Abstract: A color imaging system for use as an electronic still camera, for example, includes a color separator for separating the optical image of a subject from a lens into a plurality of different color images, an optical shutter selectively openable for transmitting the optical image of the subject to the color separator, a photoconductive layer for converting the different color images into respective electric charge images, and an information recording medium for recording images corresponding to the electric charge images under an electric field developed between the photoconductive layer and the information recording medium. The timing with which the optical shutter is opened and the timing with which the electric field is generated by the power supply, are controlled by a control unit depending on imaging conditions selected by the user. The color imaging system also has an optical viewfinder for allowing the user to visually observe the optical image of the subject introduced by the lens.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: March 2, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yoshihisa Koyama, Yuji Uchiyama, Ichiro Negishi, Tetsuji Suzuki, Fujiko Tatsumi, Ryusaku Takahashi, Keiichi Maeno
  • Patent number: 5185617
    Abstract: A method of information conversion in which a recording medium is composed of a photoconductive member and a photo-modulation member both exhibiting a photoelectric effect and a dielectric mirror interposed therebetween, laminated to each other. An electro-magnetic radiation beam intensity-modulated with a serial information to be converted is radiated to the photoconductive member. The radiated beam is deflected straight along a surface of the photoconductive member to form a charge image composed of electric charges having an electric charge quantity corresponding to the information, as arranged in a straight line in a region on a border between the photoconductive member and dielectric mirror, corresponding to a region of the photoconductive member to which the beam is radiated.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: February 9, 1993
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Ichiro Negishi, Tsutou Asakura
  • Patent number: 5164854
    Abstract: There is provided a polarization converter for producing a beam of linearly polarized light from a randomly polarized light. The randomly polarized light is separated into a first polarized light which is projected in a first predetermined direction and a second polarized light having a predetermined angular relationship with the first polarized light. The second polarized light is converted into a third polarized light a polarization of which is identical to that of the first polarized light. By providing a predetermined two-dimensional positional relationship between the first and third polarized lights, the beam of linearly polarized light is produced and advanced on the outside of the converter in a second predetermined direction.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: November 17, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Ichiro Negishi, Tetsuji Suzuki, Fujiko Tatsumi, Ryusaku Takahashi, Keiichi Maeno
  • Patent number: 5161007
    Abstract: A recording apparatus comprises first electrode, color-separation filter, recording, carrier generation, carrier transport, and second electrode layers which are laminated in order of mention. The recording layer and carrier generation layer may be separated at a given space. The recording layer comprises carrier retaining layer or a photo-modulation layer. Light image from an object is projected on the carrier generation layer through the first electrode, color-separation, and recording layers via an object lens enters the carrier generation layer. Carrier generated in the carrier generation layer in response to the light image are transported to the second electrode in response to application of a given voltage between the first and second electrodes. Discharge caused by application of the given voltage transfers a latent carrier image to the recording layer. The first electrode, color-separation filter and recording layers may be used for recording medium.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: November 3, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yoshihisa Koyama, Yuji Uchiyama
  • Patent number: 5159456
    Abstract: A photo-to-photo transducer is composed by laminating a photoconductive layer member and a photo-modulation layer member including liquid crystals of scattering type each other and disposing the members between two transparent electrodes. The transducer is operated as follows: a specified voltage is applied across the electrodes to operate the photo-modulation layer member in the vicinity of operation threshold level thereof; an electro-magnetic radiation beam for writing information is projected onto the photoconductive layer member through the electrode at the side thereof; and an electro-magnetic radiation beam for reading the information is projected onto the photo-modulation layer member through the electrode at the side thereof, thus the electro-magnetic radiation beam for reading the information is modulated accordingly with intensity of the electro-magnetic radiation beam for writing the information.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: October 27, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Tetsuji Suzuki, Keiichi Maeno
  • Patent number: 5151781
    Abstract: Color image information is recorded on a recording medium. The recording medium includes a color stripe filter having different-color filter stripes. Marks are provided on the recording medium in correspondence with the filter stripes of the color stripe filter. A detection is given of the marks on the recording medium. During the recording of the color image information, color line sequential signals are recorded on the recording medium. The recording of the color line sequential signals is synchronized with the detection of the marks on the recording medium.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: September 29, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Yoshihisa Koyama, Yuji Uchiyama
  • Patent number: 5150226
    Abstract: A image pickup device having a rewritable recording member on which optical patterns are repeatedly recorded as electrostatic images using a writing head with an electric potential applied between the head and recording member. Each image recorded on the recording member is erased prior to recording a subsequent image by application of an alternating voltage or an electric potential of opposite polarity between the writing head and recording member.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: September 22, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Hirohiko Shinonaga, Hiromichi Tai
  • Patent number: 5144443
    Abstract: There is provided an apparatus for reproducing a charge latent image prerecorded on a recording medium composed of at least a photo-modulation layer and a charge holding layer laminated thereto and holding said charge latent image. The apparatus has two electrodes interposing the recording medium therebetween. The electrodes are connected to each other and one of which is spaced from the recording medium. A reading light is allowed to permeate the photo-modulation layer. The apparatus also has a vibrator which vibrates one of the electrodes to modulate an electric field generated between the electrodes by the charge latent image prerecorded on the recording medium. The reading light is then electro-optically modulated to reproduce the charge latent image.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: September 1, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Tsutou Asakura, Masato Furuya, Tetsuji Suzuki
  • Patent number: 5144415
    Abstract: An apparatus for processing information carried by an electro-magnetic radiation beam. The apparatus includes a charge holding member for storing a charge latent image, a generator for generating an electro-magnetic radiation beam which is a superimposition of a plurality of electro-magnetic radiation beams with different wavelength ranges, a filter for separating the superimposed beam into the plurality of electro-magnetic radiation beams and a photo-conductive member provided adjacent to the charge latent image holding member and having an impedance which varies according to the intensity of each of the plurality of beams separated by the filter. Charge latent images corresponding to each of the plurality of beams are thus recorded on the charge latent image holding member. The charge latent images thus recorded on the charge latent image holding member are reproduced by means of a photo-modulation member provided instead of a photo-conductive member.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: September 1, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Tsutou Asakura, Masato Furuya, Tetsuji Suzuki
  • Patent number: 5144471
    Abstract: An electromagnetic radiation beam scanning system for scanning an object with an electromagnetic radiation beam. The scanning system comprises first and second beam-narrowing devices which are arranged so as to have elongated light-transmission regions, respectively, and which are overlapped each other so that the light-transmission regions intersect each other. Each of the beam-narrowing devices includes a light modulation layer showing an electro-optic effect, first and second electrodes disposed so as to sandwich the light modulation layer, first and second polarizers disposed so as to sandwich the light modulation layer and a power source for applying voltages to the first and second electrodes. The light modulation layer combined with the polarizers forms the elongated light-transmission region in response to application of the voltages to the first and second electrodes due to the power source so as to produce a narrowed beam when a light beam is incident thereon.
    Type: Grant
    Filed: June 26, 1990
    Date of Patent: September 1, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Tsutou Asakura, Masato Furuya, Tetsuji Suzuki, Hirohiko Shinonaga
  • Patent number: 5130826
    Abstract: There is disclosed an optical system for a color picture display having three spatial light modulators of reflecting type corresponding to an optical image of one of three primary colors by photoelectric effect and photomodulation effect, a writing device for guiding writing lights each carrying the optical image of one of the colors to each device, a reading device for guiding reading lights each in the region of wavelength of one of the colors to each device and a composing device for composing a composed reading light of the reading lights which are emitted from the optical devices respectively after optically modulated. The optical system comprises an optical apparatus shared by the reading device and the composing device, having first, second and third prisms, a first dichroic filter provided between the first and the second prisms and a second dichroic filter provided between the second and the third prisms.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: July 14, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Ichiro Negishi, Tetsuji Suzuki, Fujiko Tatsumi, Ryusaku Takahashi, Keiichi Maeno
  • Patent number: 5128893
    Abstract: A device for recording information on a recording medium as an electrostatic pattern includes a first electrode provided on a surface of the recording medium; a second electrode provided a recording device; a discharging projection formed over the second electrode and projecting towards the recording medium; a field device for developing a an electric field between the first and second electrodes; and a modulator for modulating the electric field correspondingly with the information by discharge caused between the discharging projection and a surface of the recording medium.
    Type: Grant
    Filed: March 26, 1990
    Date of Patent: July 7, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga, Masato Furuya, Tsutou Asakura, Tetsuji Suzuki
  • Patent number: 5124545
    Abstract: A light-to-light conversion element which includes at least a photoconductive layer and a photo-modulation layer and in which light incident on these layers is reflected by a reflection layer and in which a selective reflection characteristic corresponding to color separation is given to the reflection layer. Thereby, among the light incident on the photoconductive layer and the photo-modulation layer, light having wavelength of the specific region is selectively reflected by the reflection layer, so that the write and read operation of information is performed on the selected light.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: June 23, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Hirohiko Shinonaga
  • Patent number: 5122895
    Abstract: An efficiency polarization converter of few optical components for converting a randomly polarized light into a single beam of linearly polarized light, comprises a first optical device receiving the random light and projecting two linearly polarized lights one projected in a first direction, another to a second optical device which changes the polarization plane thereof, the polarization changes light being directed by a third optical device to the first direction, thereby the two linearly polarized light are combined and aligned to have a common polarization to become the single beam linearly polarized light projected in the first direction. Typical first optical device is a polarization beam splitter, a typical second optical device is a quarterwave plate with a mirror, a halfwave plate or a Fresnel rhomb with a mirror, or a photomodulation material interposed between biased electrodes with a mirror, a typical third optical device is a polarization beam splitter, a prism or a mirror.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: June 16, 1992
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Itsuo Takanashi, Shintaro Nakagaki, Ichiro Negishi, Tetsuji Suzuki, Fujiko Tatsumi, Ryusaku Takahashi, Keiichi Maeno