Patents by Inventor Shinsuke Shikama

Shinsuke Shikama 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).

  • Publication number: 20200135256
    Abstract: A signal processing circuit is provided that generates output signals to be output from spatially different output ports based on bit combinations of an input word consisting of a plurality of bit signals. A distributed memory, a ROM and a DAC in which the signal processing circuit is used are also provided. A recognition circuit includes a serial port to which a bit signal is input and 2N output ports recognizing an input N-bit word and corresponding uniquely to 2N bit combinations. Output ports of the recognition circuit are connected to 2N input ports of an electric circuit. With no signal input to the recognition circuit, all outputs are constantly in a Low level state. In a case where a bit signal is input to the serial port of the recognition circuit, only one of the output ports corresponding to the bit combinations turns to a High level state.
    Type: Application
    Filed: April 19, 2018
    Publication date: April 30, 2020
    Inventors: Salaheldin Ahmed Ezzeldin Ibrahim Mohamed, Youhei Sakamaki, Shinsuke Nakano, Kota Shikama, Yuko Kawajiri
  • Patent number: 7746570
    Abstract: Each of a plurality of Fresnel prisms 12 is formed so that a refractive surface 12 thereof includes a non-light incidence surface 12c upon which any light ray emitted from a projector 1 is not directly incident because it is intercepted by another Fresnel prism 12, the non-light incidence surface having an angle ?? with a reflective surface 12b which is different from the prism apex angle ? of each of the plurality of Fresnel prisms. As a result, a light ray reflected by the refractive surface 12a of each of the plurality of Fresnel prisms without passing through the refractive surface can be preventing from emerging, as unnecessary light, toward the viewer's line of sight.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: June 29, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Kohei Teramoto
  • Patent number: 7724413
    Abstract: Provided are a speckle removing light source capable of removing speckle by using laser light whose wavelength is temporally changed and a lighting apparatus for producing an image from which the speckle is removed. Included are a light source for outputting laser light, and a light frequency modulator for temporally changing a wavelength of the laser light. The light frequency modulator has a predetermined period set for changing the wavelength of the laser light. Also, provided is a lighting apparatus, including a spatial light modulator illuminated with the laser light outputted from the speckle removing light source to produce an image. The spatial light modulator has a period set for producing the image, which is longer than the period for changing the wavelength of the laser light by the light frequency modulator.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: May 25, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasuharu Koyata, Yoshihito Hirano, Kiyohide Sakai, Masao Imaki, Shinsuke Shikama, Jiro Suzuki, Takao Endou, Kouhei Teramoto, Shigenori Shibue
  • Patent number: 7643707
    Abstract: Provided is a lighting apparatus capable of uniformly and efficiently lighting a spatial light modulator. The lighting apparatus includes: a light source for outputting laser light; a multimode optical fiber in which the laser light outputted from the light source propagates through an internal core whose lateral cross section is a substantially polygonal outer diameter shape; and spatial light modulator for producing an image with illumination light from the multimode optical fiber. In the lighting apparatus, the laser light is outputted from the light source and is propagated to the multimode optical fiber in which an outer diameter shape of the lateral cross section of the core is a substantially polygonal shape, whereby the spatial light modulator can be uniformly and efficiently lighted.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: January 5, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasuharu Koyata, Yoshihito Hirano, Kiyohide Sakai, Masao Imaki, Shinsuke Shikama, Jiro Suzuki, Takao Endou, Kouhei Teramoto, Shigenori Shibue
  • Patent number: 7572014
    Abstract: An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: August 11, 2009
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
  • Publication number: 20090109698
    Abstract: Provided is a lighting apparatus capable of uniformly and efficiently lighting a spatial light modulator. The lighting apparatus includes: a light source for outputting laser light; a multimode optical fiber in which the laser light outputted from the light source propagates through an internal core whose lateral cross section is a substantially polygonal outer diameter shape; and spatial light modulator for producing an image with illumination light from the multimode optical fiber. In the lighting apparatus, the laser light is outputted from the light source and is propagated to the multimode optical fiber in which an outer diameter shape of the lateral cross section of the core is a substantially polygonal shape, whereby the spatial light modulator can be uniformly and efficiently lighted.
    Type: Application
    Filed: July 11, 2005
    Publication date: April 30, 2009
    Inventors: Yasuharu Koyata, Yoshihito Hirano, Kiyohide Sakai, Masao Imaki, Shinsuke Shikama, Jiro Suzuki, Takao Endou, Kouhei Teramoto, Shigenori Shibue
  • Publication number: 20090080054
    Abstract: Provided are a speckle removing light source capable of removing speckle by using laser light whose wavelength is temporally changed and a lighting apparatus for producing an image from which the speckle is removed. Provided is a speckle removing light source, including: a light source for outputting laser light; and a light frequency modulator for changing a wavelength of the laser light, in which: the wavelength of the laser light outputted from the light source is temporally changed by the light frequency modulator; and the light frequency modulator has a predetermined period set for changing the wavelength of the laser light. Also, provided is a lighting apparatus, including: a spatial light modulator illuminated with the laser light outputted from the speckle removing light source to produce an image, in which the spatial light modulator has a period set for producing the image, and the period is longer than the period for changing the wavelength of the laser light by the light frequency modulator.
    Type: Application
    Filed: July 11, 2005
    Publication date: March 26, 2009
    Inventors: Yasuharu Koyata, Yoshihito Hirano, Kiyohide Sakai, Masao Imaki, Shinsuke Shikama, Jiro Suzuki, Takao Endou, Kouhei Teramoto, Shigenori Shibue
  • Publication number: 20090067062
    Abstract: Each of a plurality of Fresnel prisms 12 is formed so that a refractive surface 12 thereof includes a non-light incidence surface 12c upon which any light ray emitted from a projector 1 is not directly incident because it is intercepted by another Fresnel prism 12, the non-light incidence surface having an angle ?? with a reflective surface 12b which is different from the prism apex angle ? of each of the plurality of Fresnel prisms. As a result, a light ray reflected by the refractive surface 12a of each of the plurality of Fresnel prisms without passing through the refractive surface can be preventing from emerging, as unnecessary light, toward the viewer's line of sight.
    Type: Application
    Filed: May 23, 2007
    Publication date: March 12, 2009
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Kohei Teramoto
  • Publication number: 20070201009
    Abstract: An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.
    Type: Application
    Filed: May 1, 2007
    Publication date: August 30, 2007
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
  • Patent number: 7242536
    Abstract: Each of a plurality of Fresnel prisms 12 is formed so that a refracting surface 12 thereof includes a non-light incidence surface 12c upon which any ray of light emitted from a projector 1 is not directly incident because it is intercepted by another Fresnel prism 12, the non-light incidence surface having an angle ?? with a reflecting surface 12b which is different from the prism apex angle ? of each of the plurality of Fresnel prisms. As a result, a ray of light reflected by the refracting surface 12a of each of the plurality of Fresnel prisms without passing through the refracting surface can be preventing from emerging, as unnecessary light, toward the viewer's line of sight.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: July 10, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Kohei Teramoto
  • Patent number: 7237908
    Abstract: An image display system includes a light valve 14 for providing image information to light converged by a converging lens 13 and for emitting the light, a projective optical system 20 including a refractive optical lens 21 for projecting the light from the light valve 14 and a convex mirror 22 for reflecting the light from the refractive optical lens 21 by using a reflecting surface thereof having negative power and for enlarging and projecting the reflected light, and a display 30 for receiving the light from the projective optical system 20 by way of a receiving surface 30A, wherein the light valve is placed away from an optical axis 23 of the projective optical system 20 and between a front surface of the display 30 and a rear surface of the projective optical system 20.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: July 3, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Shinsuke Shikama, Shuso Wadaka
  • Patent number: 7230774
    Abstract: An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: June 12, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
  • Publication number: 20070058228
    Abstract: An image display system includes a light valve 14 for providing image information to light converged by a converging lens 13 and for emitting the light, a projective optical system 20 including a refractive optical lens 21 for projecting the light from the light valve 14 and a convex mirror 22 for reflecting the light from the refractive optical lens 21 by using a reflecting surface thereof having negative power and for enlarging and projecting the reflected light, and a display 30 for receiving the light from the projective optical system 20 by way of a receiving surface 30A, wherein the light valve is placed away from an optical axis 23 of the projective optical system 20 and between a front surface of the display 30 and a rear surface of the projective optical system 20.
    Type: Application
    Filed: November 2, 2006
    Publication date: March 15, 2007
    Inventors: Hiroshi SUZUKI, Kohei Teramoto, Shinsuke Shikama, Shuso Wadaka
  • Patent number: 7163297
    Abstract: An image display system includes a light valve 14 for providing image information to light converged by a converging lens 13 and for emitting the light, a projective optical system 20 including a refractive optical lens 21 for projecting the light from the light valve 14 and a convex mirror 22 for reflecting the light from the refractive optical lens 21 by using a reflecting surface thereof having negative power and for enlarging and projecting the reflected light, and a display 30 for receiving the light from the projective optical system 20 by way of a receiving surface 30A, wherein the light valve is placed away from an optical axis 23 of the projective optical system 20 and between a front surface of the display 30 and a rear surface of the projective optical system 20.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: January 16, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Shinsuke Shikama, Shuso Wadaka
  • Publication number: 20060227433
    Abstract: Each of a plurality of Fresnel prisms 12 is formed so that a refractive surface 12 thereof includes a non-light incidence surface 12c upon which any light ray emitted from a projector 1 is not directly incident because it is intercepted by another Fresnel prism 12, the non-light incidence surface having an angle ?? with a reflective surface 12b which is different from the prism apex angle ? of each of the plurality of Fresnel prisms. As a result, a light ray reflected by the refractive surface 12a of each of the plurality of Fresnel prisms without passing through the refractive surface can be preventing from emerging, as unnecessary light, toward the viewer's line of sight.
    Type: Application
    Filed: October 4, 2004
    Publication date: October 12, 2006
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Kohei Teramoto
  • Patent number: 7079318
    Abstract: A transmission screen has a refraction total reflection Fresnel lens plate, a stray light eliminating plate, and an image display plate. The stray light eliminating plate has a condensing lens array and black stripes. The array has unit lenses arranged at an incident plane of the transparent substrate in a periodic structure in an up-and-down direction. The black stripes have transparent sections placed near condensing light points of the unit lens and opaque sections around the condensing light points of the unit lenses. The sections are alternately arranged at the outgoing plane of the transmission substrate in a periodic structure in an up-and-down direction. The image display plate has lenticular lenses in which unit lenses are arranged in a periodic structure in a horizontal direction at an incident plane of the transmission substrate of a scattering characteristic capable of scattering light fluxes.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: July 18, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shinsuke Shikama, Hiroshi Suzuki, Kohei Teramoto, Akihisa Miyata
  • Patent number: 7075718
    Abstract: A transparent screen includes a refraction/total reflection plate in a form of a Fresnel lens, the refraction/total reflection plate having a sawtooth surface upon which light is incident and another surface via which the light exits, and an image formation/display plate for forming a projection image from the light that exits from the refraction/total reflection plate. Refraction slating surface portions each for refracting incident light towards the other surface of the refraction/total reflection plate, transmission slating surface portions each for making incident light pass therethrough, and total reflection slating surface portions each for reflecting incident light passing through one transmission slating surface portion towards the other surface of the refraction/total reflection plate being formed concentrically on the sawtooth surface of the refraction/total reflection plate.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: July 11, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Shuso Wadaka, Kohei Teramoto, Kuniko Kojima, Shigekazu Tsuda
  • Publication number: 20060098294
    Abstract: An image display device comprises an optical imaging arrangement for providing image information to illumination light and for transmitting the light as an optical image signal; a display for receiving the optical image signal and for displaying an image based on the image information; and a projecting optical arrangement including a reflecting part having a reflecting surface for reflecting the optical image signal, and a refracting optical part having a refracting surface for projecting the optical image signal onto the reflecting part. At least one of the reflecting surface and the refracting surface is aspherical.
    Type: Application
    Filed: September 27, 2005
    Publication date: May 11, 2006
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
  • Patent number: 6994437
    Abstract: An image display device includes an optical imaging arrangement for providing image information to illumination light and for transmitting the image information as an optical image signal; a projecting optical arrangement for receiving the optical image signal and for projecting the optical image signal; a display for receiving the optical image signal through the projecting optical arrangement and for displaying an image based on the image information; and a plane mirror for reflecting the optical image signal output from the projecting optical arrangement on the display.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: February 7, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Kohei Teramoto, Jiro Suzuki, Shinsuke Shikama
  • Patent number: 6912017
    Abstract: There is disclosed a display device using a color wheel having a color filter Cw, in addition to normal color filters corresponding to the three primary colors. The filter Cw has almost flat spectral transmission characteristics. Brightness information included in a color image signal is quantized with (n+m) bits. Information corresponding to the lower-order n bits is displayed by light transmitted through the filter Cw. Information corresponding to the upper-order n bits is displayed by light transmitted through the normal color filters. Only brightness information to which the human eye is visually sensitive is reproduced by the filter Cw having a lower transmissivity. This can eliminate a lack of the number of gray levels due to a constraint on the minimum switching speed of a light valve. Furthermore, the brightness little deteriorates.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: June 28, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Koji Minami, Yoshiteru Suzuki, Kohei Teramoto, Hiroaki Sugiura, Shinsuke Shikama