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).

  • Patent number: 10187620
    Abstract: The present invention prevents image quality degradation due to pixel enlargement even when using an increased angle of inclination on projecting an image obliquely from a laser scanning display device. A swing mirror is controlled so that the scanning line density in the vertical direction of a display section is uniform in accordance with information including the angle of inclination, the distance of projection, and the display size of the display device with respect to the display section. A lens control driver is controlled so that a collecting lens has a focal point on the display section in accordance with a scanning position in the vertical direction of the swing mirror. The swing mirror or an image correction processing unit is controlled so that a display size in the horizontal direction of a display image on the display section is uniform regardless of the scanning position in the vertical direction.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: January 22, 2019
    Assignee: MAXELL, LTD.
    Inventors: Tomoki Kobori, Yoshiho Seo, Yuya Ogi, Satoshi Oouchi
  • Patent number: 10088742
    Abstract: A laser projection display system that executes, by swinging a scan mirror, scanning with laser light of multiple colors in accordance with image signals, thereby displaying an image in accordance with the image signals, includes: a timing adjustment unit that divides temporally a display period during which the image signals are displayed and a light emission period for intensity detection to detect the intensity of the laser light; a laser light source that generates the laser light of the multiple colors; a laser light source driving unit that drives the laser light source in synchronization with a signal from the timing adjustment unit; and a scan mirror driving unit including: a first scanning means that executes scanning in a first direction in response to synchronization signals according to the image signals, with laser light generated by the laser light source through the scan mirror.
    Type: Grant
    Filed: July 11, 2017
    Date of Patent: October 2, 2018
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Yuya Ogi, Tomoki Kobori, Yoshiho Seo
  • Patent number: 10089911
    Abstract: The purpose of the present invention is to provide a laser scanning display device capable of achieving high-resolution projection display while ensuring that the luminance and the size of the pixels are uniform to maintain the quality of the projection display. The scanning display device is configured to apply noise from a dither noise generator (21) to a horizontal scanning position on an oscillating mirror (11,12) determined by a scanning position determination unit (13); normalize the horizontal scanning position to which the noise was applied using a normalizing unit (22); acquire a pixel address corresponding to the normalized horizontal scanning position by referring to a pixel address table (23); read pixel data corresponding to the pixel address from an image memory (14); and modulate laser light by driving a light source (17) for emitting the laser light.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: October 2, 2018
    Assignee: Maxell, Ltd.
    Inventors: Tomoki Kobori, Yoshiho Seo, Yuya Ogi, Satoshi Ouchi
  • Publication number: 20180176524
    Abstract: The laser projection display device includes a scanning mirror reflecting and two-dimensionally scanning a laser beam emitted from a laser light source and sensors detecting rotation angles of the scanning mirror, and controls driving of the scanning mirror on the basis of sensor signals output from the sensors. At this time, a temperature compensation unit compensates for temperature dependency of a transfer characteristic of a signal transmission line for transmitting the sensor signals according to a temperature measured by a thermometer arranged in the vicinity of the scanning mirror. In order to correct amplitudes and phases of the rotation angles of the scanning mirror obtained from the sensor signal, the temperature compensation unit includes a look-up table storing correction amounts for each temperature.
    Type: Application
    Filed: October 23, 2017
    Publication date: June 21, 2018
    Inventors: Tomoki KOBORI, Tatsuya YAMASAKI, Junji NAKAJIMA, Katsuhiko KIMURA, Takanori AONO
  • Publication number: 20180020198
    Abstract: A laser projection display system that executes, by swinging a scan mirror, scanning with laser light of multiple colors in accordance with image signals, thereby displaying an image in accordance with the image signals, includes: a timing adjustment unit that divides temporally a display period during which the image signals are displayed and a light emission period for intensity detection to detect the intensity of the laser light; a laser light source that generates the laser light of the multiple colors; a laser light source driving unit that drives the laser light source in synchronization with a signal from the timing adjustment unit; and a scan mirror driving unit including: a first scanning means that executes scanning in a first direction in response to synchronization signals according to the image signals, with laser light generated by the laser light source through the scan mirror.
    Type: Application
    Filed: July 11, 2017
    Publication date: January 18, 2018
    Inventors: Yuya OGI, Tomoki KOBORI, Yoshiho SEO
  • Publication number: 20170140689
    Abstract: The purpose of the present invention is to provide a laser scanning display device capable of achieving high-resolution projection display while ensuring that the luminance and the size of the pixels are uniform to maintain the quality of the projection display. The scanning display device is configured to apply noise from a dither noise generator (21) to a horizontal scanning position on an oscillating mirror (11,12) determined by a scanning position determination unit (13); normalize the horizontal scanning position to which the noise was applied using a normalizing unit (22); acquire a pixel address corresponding to the normalized horizontal scanning position by referring to a pixel address table (23); read pixel data corresponding to the pixel address from an image memory (14); and modulate laser light by driving a light source (17) for emitting the laser light.
    Type: Application
    Filed: May 16, 2014
    Publication date: May 18, 2017
    Inventors: Tomoki KOBORI, Yoshiho SEO, Yuya OGI, Satoshi OUCHI
  • Publication number: 20160255316
    Abstract: The present invention prevents image quality degradation due to pixel enlargement even when using an increased angle of inclination on projecting an image obliquely from a laser scanning display device. A swing mirror is controlled so that the scanning line density in the vertical direction of a display section is uniform in accordance with information including the angle of inclination, the distance of projection, and the display size of the display device with respect to the display section. A lens control driver is controlled so that a collecting lens has a focal point on the display section in accordance with a scanning position in the vertical direction of the swing mirror. The swing mirror or an image correction processing unit is controlled so that a display size in the horizontal direction of a display image on the display section is uniform regardless of the scanning position in the vertical direction.
    Type: Application
    Filed: September 24, 2013
    Publication date: September 1, 2016
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Tomoki KOBORI, Yoshiho SEO, Yuya OGI, Satoshi OUCHI
  • Patent number: 9372387
    Abstract: A laser projector includes a laser light source to emit laser light modulated in accordance with image information, a scanner to drive the laser light along two axes in horizontal and vertical directions and make scanning two-dimensionally with the laser light, a scanning mirror drive part to produce a drive signal of the scanner, a light source data conversion part to change arrangement in a horizontal direction of data applied to the laser light source and a timing generation part to synchronize the scanning mirror drive part with the light source data conversion part, and a start direction of laser scanning in the horizontal direction is changed every frame of the image information.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: June 21, 2016
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Yoshiho Seo, Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Junichi Yokoyama, Hidehiro Ikeda, Masayuki Fukui, Masahiko Yatsu, Tatsuya Ishikawa
  • Patent number: 9349348
    Abstract: A laser beam display device includes: a dimming setting input unit into which any one of the dimming values of plural dimming steps are input; a first dimming processing unit having plural dimming LUTs that store dimming amounts regarding the respective dimming steps with the corresponding gradation levels as indexes; a second dimming processing unit having one gain LUT that holds gains regarding the respective dimming steps and a multiplier that creates the indexes for the respective dimming LUTs by multiplying a video signal by the gains; and a light source drive unit that drives a laser diode on the basis of reference results obtained by referring to the dimming LUTs of the first dimming processing unit. The luminance of the emission beam of the laser diode, which corresponds to the video signal, is dimmed in accordance with a dimming setting input from the dimming setting input unit.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: May 24, 2016
    Assignee: HITACHI-LG DATA STORAGE, INC.
    Inventors: Fumio Haruna, Yuya Ogi, Tomoki Kobori, Yoshiho Seo, Masayuki Hatori, Toshio Ueda
  • Patent number: 9256060
    Abstract: Two pieces of elliptic semi-sphere surfaces, each forming a pinhole at the zenith thereof and also forming a reflection mirror on an inside thereof are stuck onto each other, with facing the interior surfaces thereof, respectively. A light ray entering therein from one of the pinholes, after being reflected between the elliptic semi-sphere surfaces facing to each other, emits from the pinhole on opposite side at an angle plane symmetric to the incident angle. Disposing the elliptic semi-sphere surfaces facing to each other, aligning on a plane, by plural numbers thereof, there is built up a pinhole array. Plural numbers of light rays reflecting on and/or emitting from a display object, which is disposed on one side of the pinhole array, after passing through the plural numbers of pinholes of the pinhole array, form an image at a position plane symmetric thereto, on the opposite side of the pinhole array.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: February 9, 2016
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Tomoki Kobori, Yoshiho Seo, Koji Hirata, Hidehiro Ikeda, Satoshi Ouchi
  • Patent number: 9122145
    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: Grant
    Filed: October 26, 2010
    Date of Patent: September 1, 2015
    Assignee: Hitachi Maxwell, Ltd.
    Inventors: Tadayoshi Kosaka, Satoshi Ouchi, Mayumi Nagayoshi, Yoshiho Seo, Tomoki Kobori
  • Publication number: 20150153551
    Abstract: Two pieces of elliptic semi-sphere surfaces, each forming a pinhole at the zenith thereof and also forming a reflection mirror on an inside thereof are stuck onto each other, with facing the interior surfaces thereof, respectively. A light ray entering therein from one of the pinholes, after being reflected between the elliptic semi-sphere surfaces facing to each other, emits from the pinhole on opposite side at an angle plane symmetric to the incident angle. Disposing the elliptic semi-sphere surfaces facing to each other, aligning on a plane, by plural numbers thereof, there is built up a pinhole array. Plural numbers of light rays reflecting on and/or emitting from a display object, which is disposed on one side of the pinhole array, after passing through the plural numbers of pinholes of the pinhole array, form an image at a position plane symmetric thereto, on the opposite side of the pinhole array.
    Type: Application
    Filed: February 22, 2013
    Publication date: June 4, 2015
    Inventors: Tomoki Kobori, Yoshiho Seo, Koji Hirata, Hidehiro Ikeda, Satoshi Ouchi
  • Patent number: 8827459
    Abstract: An optical unit includes a light source that emits light to be projected onto a screen, one or a plurality of optical elements that controls a spread of a beam of light from the light source to the screen, a combining element that combines the light emitted from the light source, and a scanning element. The light source outputs an optical beam that will generate an elliptically shaped beam spot on the screen, the beam spot having a major axis substantially perpendicular to a scanning direction, and the light source is driven with pulse width modulation (PWM) so that one driven pulse corresponds to one beam spot on the screen.
    Type: Grant
    Filed: August 29, 2013
    Date of Patent: September 9, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Mayumi Nagayoshi, Satoshi Ouchi, Tadayoshi Kosaka, Tomoki Kobori, Yoshiho Seo
  • Publication number: 20140192093
    Abstract: A laser beam display device includes: a dimming setting input unit into which any one of the dimming values of plural dimming steps are input; a first dimming processing unit having plural dimming LUTs that store dimming amounts regarding the respective dimming steps with the corresponding gradation levels as indexes; a second dimming processing unit having one gain LUT that holds gains regarding the respective dimming steps and a multiplier that creates the indexes for the respective diming LUTs by multiplying a video signal by the gains; and a light source drive unit that drives a laser diode on the basis of reference results obtained by referring to the dimming LUTs of the first dimming processing unit. The luminance of the emission beam of the laser diode, which corresponds to the video signal, is dimmed in accordance with a dimming setting input from the dimming setting input unit.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 10, 2014
    Applicant: HITACHI MEDIA ELECTRONICS CO., LTD.
    Inventors: Fumio HARUNA, Yuya OGI, Tomoki KOBORI, Yoshiho SEO, Masayuki HATORI, Toshio UEDA
  • Patent number: 8757816
    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: Grant
    Filed: September 28, 2011
    Date of Patent: June 24, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Tadayoshi Kosaka, Satoshi Ouchi, Yoshiho Seo, Tomoki Kobori
  • Publication number: 20140015874
    Abstract: An optical unit includes a light source that emits light to be projected onto a screen, one or a plurality of optical elements that controls a spread of a beam of light from the light source to the screen, a combining element that combines the light emitted from the light source, and a scanning element. The light source outputs an optical beam that will generate an elliptically shaped beam spot on the screen, the beam spot having a major axis substantially perpendicular to a scanning direction, and the light source is driven with pulse width modulation (PWM) so that one driven pulse corresponds to one beam spot on the screen.
    Type: Application
    Filed: August 29, 2013
    Publication date: January 16, 2014
    Applicant: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Mayumi Nagayoshi, Satoshi Ouchi, Tadayoshi Kosaka, Tomoki Kobori, Yoshiho Seo
  • Patent number: 8625082
    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: September 6, 2012
    Date of Patent: January 7, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Tomoki Kobori, Satoshi Ouchi, Koji Hirata, Hidehiro Ikeda, Kazuo Shikita
  • Patent number: 8529068
    Abstract: A beam light source of an image display device which displays an image on a screen by scanning an optical beam in a two-dimensional direction in which the beam light source includes a light source that emits a diffuse light modulated according to an image signal, and an optical element that shapes the light emitted from the light source to the optical beam. The optical beam has an elliptically shaped beam spot on the screen in which a major axis of the beam spot is substantially perpendicular to a scanning direction. A horizontal spot size of the optical beam on an exit surface of the optical element is at least or equal to a horizontal spot size of the optical beam on the screen, and the horizontal spot size of the optical beam on the screen is no greater than a horizontal pixel pitch displayed on the screen.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: September 10, 2013
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Tomoki Kobori, Yoshiho Seo, Tadayoshi Kosaka, Mayumi Nagayoshi, Satoshi Ouchi
  • Publication number: 20130207950
    Abstract: In an image display apparatus which projects and displays an image by scanning emitted light from light sources by a reflective mirror, a correction unit calculates a threshold value and a slope efficiency of a light amount vs. current characteristic of each of the plurality of light sources, from a first light amount value obtained by measuring a light amount when an input image signal agrees with a first reference signal level and a second light amount value obtained by measuring a light amount when the input image signal agrees with a second reference signal level; and corrects, when a calculation result of the threshold value and the slope efficiency varied after a predetermined time, a threshold current and also make a correction so that a light amount ratio of the light sources becomes the same as an initial value of a slope efficiency ratio.
    Type: Application
    Filed: September 6, 2012
    Publication date: August 15, 2013
    Inventors: Fumio HARUNA, Tomoki Kobori
  • Publication number: 20130107224
    Abstract: A beam light source of an image display device which displays an image on a screen by scanning an optical beam in a two-dimensional direction in which the beam light source includes a light source that emits a diffuse light modulated according to an image signal, and an optical element that shapes the light emitted from the light source to the optical beam. The optical beam has an elliptically shaped beam spot on the screen in which a major axis of the beam spot is substantially perpendicular to a scanning direction. A horizontal spot size of the optical beam on an exit surface of the optical element is at least or equal to a horizontal spot size of the optical beam on the screen, and the horizontal spot size of the optical beam on the screen is no greater than a horizontal pixel pitch displayed on the screen.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 2, 2013
    Inventors: Mayumi Nagayoshi, Satoshi Ouchi, Tadayoshi Kosaka, Tomoki Kobori, Yoshiho Seo