Patents by Inventor Tomoki Kobori

Tomoki Kobori 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: 20120327391
    Abstract: A display apparatus is provided which, when projecting a video onto a curved surface of an object for display, can realize an undistorted display of the video. The measuring means outputs the distance information representing the distance to the object. Based on the distance information produced by the measuring means, the curved surface contour is detected with high precision. According to at least the detected curved surface contour distortions, pixels of the display image are unevenly rearranged to correct the video information before it is output. This arrangement realizes an undistorted display of video when the video is projected onto the curved surface of the object.
    Type: Application
    Filed: September 6, 2012
    Publication date: December 27, 2012
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Patent number: 8308301
    Abstract: Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: November 13, 2012
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Mayumi Nagayoshi, Satoshi Ouchi, Tadayoshi Kosaka, Tomoki Kobori, Yoshiho Seo
  • Patent number: 8287136
    Abstract: A display apparatus is provided which, when projecting a video onto a curved surface of an object for display, can realize an undistorted display of the video. The measuring means outputs the distance information representing the distance to the object. Based on the distance information produced by the measuring means, the curved surface contour is detected with high precision. According to at least the detected curved surface contour distortions, pixels of the display image are unevenly rearranged to correct the video information before it is output. This arrangement realizes an undistorted display of video when the video is projected onto the curved surface of the object.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: October 16, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Patent number: 8210687
    Abstract: For enabling to prevent ill effects from being generated in the structures of a reflection mirror, even if increasing an output energy from a light source, thereby preventing ill influences from being exerted on the driving condition thereof, a mirror drive controller unit 7 reads out history data of the past, relating to temperature changes on a micro mirror 1, from a first LUT holder unit 19. Upon basis of the read-out history data of the past is presumed the temperature on the micro mirror 1 at the present time. The presumed temperature on the micro mirror 1 is temperature P temp of the micro mirror 1 at the present time, and upon that P temp are changed vibration (or oscillation) condition of the micro mirror 1 in the horizontal (H) direction and vibration (or oscillation) condition thereof in the vertical (V) direction.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: July 3, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Seiji Murata, Kazuo Shikita
  • Publication number: 20120082177
    Abstract: A laser projector for scanning a laser beam output by a multimode laser light source and displaying an image includes a laser driving unit to drive the multimode laser light source so that two-dimensional output patterns of a shape of the laser beam are different in each display frame. The laser driving unit applies to the multimode laser light source a driving waveform pattern which has the same product of an output intensity and output time of a laser light source during a display time of one dot and which includes an output intensity and output time different in each display frame.
    Type: Application
    Filed: September 28, 2011
    Publication date: April 5, 2012
    Inventors: Tadayoshi Kosaka, Satoshi Ouchi, Yoshiho Seo, Tomoki Kobori
  • Patent number: 8066385
    Abstract: A lighting unit that optimizes an oscillation frequency for oscillating a diffusion device and its amplitude amount and a projecting display using the lighting unit are provided. Driving of a light source driving unit is controlled on the basis of driving of the oscillation driving unit.
    Type: Grant
    Filed: January 23, 2008
    Date of Patent: November 29, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Seiji Murata, Hidehiro Ikeda
  • Publication number: 20110273629
    Abstract: For enabling to prevent ill effects from being generated in the structures of a reflection mirror, even if increasing an output energy from a light source, thereby preventing ill influences from being exerted on the driving condition thereof, a mirror drive controller unit 7 reads out history data of the past, relating to temperature changes on a micro mirror 1, from a first LUT holder unit 19. Upon basis of the read-out history data of the past is presumed the temperature on the micro mirror 1 at the present time. The presumed temperature on the micro mirror 1 is temperature P temp of the micro mirror 1 at the present time, and upon that P temp are changed vibration (or oscillation) condition of the micro mirror 1 in the horizontal (H) direction and vibration (or oscillation) condition thereof in the vertical (V) direction.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 10, 2011
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Seiji Murata, Kazuo Shikita
  • Publication number: 20110242498
    Abstract: A projector using coherent light as a light source includes: one or more coherent light sources emitting coherent light beams; a beam scanner which changes a direction of the coherent light beam; and a beam splitter which splits a beam into multiple segments and changes a phase of light of each split segment, the beam splitter being located in an optical path between the beam scanner and the coherent light source. This projector reduces speckle noises. The beam splitter includes a pair of transparent substrates; a plurality of parallel electrodes disposed on each surface of the pair of transparent substrates, the pair of the parallel electrodes being disposed in a perpendicular direction to each other. Voltages are applied to the respective electrodes at predetermined time intervals so as to produce different potentials in a liquid crystal sandwiched by the transparent substrates.
    Type: Application
    Filed: October 26, 2010
    Publication date: October 6, 2011
    Inventors: Tadayoshi KOSAKA, Satoshi OUCHI, Mayumi NAGAYOSHI, Yoshiho SEO, Tomoki KOBORI
  • Patent number: 8002414
    Abstract: For enabling to prevent ill effects from being generated in the structures of a reflection mirror, even if increasing an output energy from a light source, thereby preventing ill influences from being exerted on the driving condition thereof, a mirror drive controller unit 7 reads out history data of the past, relating to temperature changes on a micro mirror 1, from a first LUT holder unit 19. Upon basis of the read-out history data of the past is presumed the temperature on the micro mirror 1 at the present time. The presumed temperature on the micro mirror 1 is temperature P temp of the micro mirror 1 at the present time, and upon that P temp are changed vibration (or oscillation) condition of the micro mirror 1 in the horizontal (H) direction and vibration (or oscillation) condition thereof in the vertical (V) direction.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: August 23, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Seiji Murata, Kazuo Shikita
  • Publication number: 20100259727
    Abstract: Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed.
    Type: Application
    Filed: April 13, 2010
    Publication date: October 14, 2010
    Inventors: Mayumi NAGAYOSHI, Satoshi OUCHI, Tadayoshi KOSAKA, Tomoki KOBORI, Yoshiho SEO
  • Patent number: 7787167
    Abstract: In a method for driving a micro mirror such as MEMS mirror and a display apparatus using the method, there are provided a mirror driving unit for driving the micro mirror which operates in a resonant mode and a nonresonant mode, a driving-condition setting unit for setting a mirror driving condition, a switching unit for switching on/off a mirror driving signal in the nonresonant mode, and a look-up table for indicating the relationship of a mirror response with respect to the driving condition already known in advance. The switching unit controls the transmission of the nonresonant-mode mirror driving signal while grasping the mirror response state with respect to the mirror driving signal, thereby finely increasing and decreasing a driving torque for the micro mirror. This fine increase and decrease allows the micro mirror to be fluctuated stably, and a further enhancement in the fluctuation rate.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: August 31, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Publication number: 20100079683
    Abstract: A display apparatus is provided which, when projecting a video onto a curved surface of an object for display, can realize an undistorted display of the video. The measuring means outputs the distance information representing the distance to the object. Based on the distance information produced by the measuring means, the curved surface contour is detected with high precision. According to at least the detected curved surface contour distortions, pixels of the display image are unevenly rearranged to correct the video information before it is output. This arrangement realizes an undistorted display of video when the video is projected onto the curved surface of the object.
    Type: Application
    Filed: April 20, 2009
    Publication date: April 1, 2010
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Publication number: 20090237627
    Abstract: In a method for driving a micro mirror such as MEMS mirror and a display apparatus using the method, there are provided a mirror driving unit for driving the micro mirror which operates in a resonant mode and a nonresonant mode, a driving-condition setting unit for setting a mirror driving condition, a switching unit for switching on/off a mirror driving signal in the nonresonant mode, and a look-up table for indicating the relationship of a mirror response with respect to the driving condition already known in advance. The switching unit controls the transmission of the nonresonant-mode mirror driving signal while grasping the mirror response state with respect to the mirror driving signal, thereby finely increasing and decreasing a driving torque for the micro mirror. This fine increase and decrease allows the micro mirror to be fluctuated stably, and a further enhancement in the fluctuation rate.
    Type: Application
    Filed: February 9, 2009
    Publication date: September 24, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Tomoki KOBORI, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Publication number: 20090059179
    Abstract: For enabling to prevent ill effects from being generated in the structures of a reflection mirror, even if increasing an output energy from a light source, thereby preventing ill influences from being exerted on the driving condition thereof, a mirror drive controller unit 7 reads out history data of the past, relating to temperature changes on a micro mirror 1, from a first LUT holder unit 19. Upon basis of the read-out history data of the past is presumed the temperature on the micro mirror 1 at the present time. The presumed temperature on the micro mirror 1 is temperature P temp of the micro mirror 1 at the present time, and upon that P temp are changed vibration (or oscillation) condition of the micro mirror 1 in the horizontal (H) direction and vibration (or oscillation) condition thereof in the vertical (V) direction.
    Type: Application
    Filed: July 9, 2008
    Publication date: March 5, 2009
    Inventors: Tomoki KOBORI, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Seiji Murata, Kazuo Shikita
  • Publication number: 20080204667
    Abstract: A lighting unit that optimizes an oscillation frequency for oscillating a diffusion device and its amplitude amount and a projecting display using the lighting unit are provided. Driving of a light source driving unit is controlled on the basis of driving of the oscillation driving unit.
    Type: Application
    Filed: January 23, 2008
    Publication date: August 28, 2008
    Inventors: Tomoki Kobori, Satoshi Ouchi, Seiji Murata, Hidehiro Ikeda
  • Patent number: 7336322
    Abstract: An image display apparatus includes a second converging unit constructed so that a light flux from part of a first light source or from a separately provided second light source is converged to have a line shape, a spectroscope/deflector unit constructed so that his line-shape light flux is irradiated on a region of the display device different from the region on which a strip-shape light flux from a first converging unit is irradiated, and an image processing unit constructed to control so that the pixels of the region of the display device on which the line-shape light flux is irradiated is turned on and off in accordance with image data being displayed.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: February 26, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Tsuneyuki Nozawa
  • Patent number: 7284864
    Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: October 23, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
  • Publication number: 20070109500
    Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.
    Type: Application
    Filed: January 3, 2007
    Publication date: May 17, 2007
    Applicant: HITACHI, LTD.
    Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
  • Patent number: 7165844
    Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: January 23, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
  • Publication number: 20060256294
    Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.
    Type: Application
    Filed: July 24, 2006
    Publication date: November 16, 2006
    Applicant: HITACHI, LTD.
    Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa