Patents by Inventor Tomoto Kawamura

Tomoto Kawamura 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: 11493759
    Abstract: It is an objective of this disclosure to protect a highly transparent hologram light guide plate from water vapor and ultraviolet ray, thereby suppressing deterioration of the hologram light guide plate even when employed in a head mount display used in outdoor environments. A hologram light guide plate according to this disclosure comprises a protection layer that protects a hologram layer and an intermediate layer that is placed between a glass layer and the protection layer, wherein the glass layer and the hologram layer form a transfer layer that transfers image light. The intermediate layer causes the image light to transfer only in the transfer layer in a section from an input area of the image light to an output area of the image light.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: November 8, 2022
    Assignee: HITACHI-LG DATA STORAGE, INC.
    Inventors: Tomoto Kawamura, Takeru Utsugi, Mitsuru Nagasawa, Hiromichi Yamakawa
  • Publication number: 20220214266
    Abstract: This invention is capable of improving performance of a biochemical analyzer and facilitating the maintenance. A light source includes: a first LED that emits ultraviolet light and a second LED that has a light emission spectrum different from that of the first LED, the first LED and the second LED being disposed in parallel; a reflection surface that is opposite to the first LED and reflects light of the first LED; and a dichroic surface that is opposite to the second LED, reflects light of the first LED, and allows light of the second LED to penetrate.
    Type: Application
    Filed: January 31, 2020
    Publication date: July 7, 2022
    Inventors: Yoshifumi SEKIGUCHI, Shin IMAMURA, Takahiro ANDO, Tomoto KAWAMURA, Yuya MATSUOKA, Sakuichiro ADACHI, Yasuhiro KETA, Eiichiro TAKADA
  • Publication number: 20220082492
    Abstract: A biological sample detection device configured to acquire color information of an object of analysis without a deterioration in color extraction accuracy caused by incorrect extraction of color of a colored label and to measure the amount of liquid and determine the type of a sample, by analyzing the biological sample housed in a biological sample tube to which a colored label is attached, and determining whether or not a colored label is present on the biological sample tube; extracting the colored label determined to be present by the colored label presence determining process; removing the colored label from the color image and extracting a detection object region in the biological sample; and analyzing to acquire color information of the detection object region and analyze the liquid amount and the type of the biological sample.
    Type: Application
    Filed: January 14, 2020
    Publication date: March 17, 2022
    Inventors: Mayu Sao, Nobuyoshi Shimane, Fumiyasu Sato, Tomoto Kawamura
  • Publication number: 20210382309
    Abstract: An objective of the present disclosure is to provide an image display device capable of (1) improving light utilization efficiency in a waveguide direction, and (2) overcoming a trade-off relationship between FoV and an eye-box in a non-waveguide direction. In the image display device according to the present disclosure, the waveguide includes a first angle conversion region for angular conversion of first image light, and a second angle conversion region for angular conversion of second image light in a direction different from the first image light.
    Type: Application
    Filed: May 24, 2021
    Publication date: December 9, 2021
    Inventors: Takeru UTSUGI, Tomoto KAWAMURA
  • Publication number: 20210381954
    Abstract: A broadband light source device in a biochemical analyzing device, and facilitates maintenance thereof, including an LED substrate that is provided with an LED chip generating a light beam having a first wavelength band and including a fluorescent substance in the light beam having a first wavelength band and that is provided with an LED chip generating a light beam having a second wavelength band, in which the fluorescent substance includes at least alumina and at least one of Fe, Cr, Bi, Tl, Ce, Tb, Eu, and Mn and is produced by calcining a raw material that contains sodium at 6.1 to 15.9 wt. % in the whole raw material. The broadband light source device further includes an optical system including a light pipe that color-mixes the light beam passing through the fluorescent substance of the LED chip and the light beam emitted from the LED chip, and a flat dichroic prism.
    Type: Application
    Filed: October 9, 2019
    Publication date: December 9, 2021
    Inventors: Tomoto KAWAMURA, Takahiro ANDO, Shin IMAMURA, Masaaki KOMATSU, Yuya MATSUOKA, Takeshi ISHIDA, Sakuichiro ADACHI
  • Patent number: 11143872
    Abstract: Both uniformity of brightness and uniformity of color of the outside world are seen via a waveguide. A video image is reflected by a partial reflection surface inside the waveguide that includes an incident surface on which video image light is incident, first and second internal reflection surfaces that propagate the video image light incident from the incident surface while totally reflecting the video image light, and are substantially parallel to each other. A plurality of partial reflection surfaces that reflect a part of the video image light propagating by being totally reflected by the first and second internal reflection surfaces, output the part of the video image light as output light from the first internal reflection surface to the outside of the waveguide, and transmit the part of the video image light being incident, and are disposed substantially parallel to each other inside the waveguide.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: October 12, 2021
    Assignee: HITACHI-LG DATA STORAGE, INC.
    Inventors: Ryuji Ukai, Tomoto Kawamura, Satoshi Ouchi, Yoshiho Seo, Seiji Murata
  • Publication number: 20210149183
    Abstract: There is provided a highly efficient virtual image projection device in a small size that displays images of high luminance in which an illumination system is reduced in size with no degradation in an effective luminous light beam. A virtual image projection device that shows video to a human eye includes a virtual light source surface (116) that emits a light beam in a predetermined angular distribution, an image forming lens (117) that condenses the light beam from the virtual light source surface (116), and a display (120) that creates video. When the virtual light source surface (116) is disposed at a nearly focal position on the front side of the image forming lens (117), the display (120) is disposed at a nearly focal position on the rear side of the image forming lens.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 20, 2021
    Inventors: Seiji MURATA, Ryuji UKAI, Tomoto KAWAMURA, Toshiteru NAKAMURA
  • Publication number: 20210041699
    Abstract: Both uniformity of brightness and uniformity of color of the outside world are seen via a waveguide. A video image is reflected by a partial reflection surface inside the waveguide that includes an incident surface on which video image light is incident, first and second internal reflection surfaces that propagate the video image light incident from the incident surface while totally reflecting the video image light, and are substantially parallel to each other. A plurality of partial reflection surfaces that reflect a part of the video image light propagating by being totally reflected by the first and second internal reflection surfaces, output the part of the video image light as output light from the first internal reflection surface to the outside of the waveguide, and transmit the part of the video image light being incident, and are disposed substantially parallel to each other inside the waveguide.
    Type: Application
    Filed: September 11, 2018
    Publication date: February 11, 2021
    Inventors: Ryuji UKAI, Tomoto KAWAMURA, Satoshi OUCHI, Yoshiho SEO, Seiji MURATA
  • Publication number: 20210033864
    Abstract: It is an objective of this disclosure to protect a highly transparent hologram light guide plate from water vapor and ultraviolet ray, thereby suppressing deterioration of the hologram light guide plate even when employed in a head mount display used in outdoor environments. A hologram light guide plate according to this disclosure comprises a protection layer that protects a hologram layer and an intermediate layer that is placed between a glass layer and the protection layer, wherein the glass layer and the hologram layer form a transfer layer that transfers image light. The intermediate layer causes the image light to transfer only in the transfer layer in a section from an input area of the image light to an output area of the image light.
    Type: Application
    Filed: June 16, 2020
    Publication date: February 4, 2021
    Inventors: Tomoto KAWAMURA, Takeru UTSUGI, Mitsuru NAGASAWA, Hiromichi YAMAKAWA
  • Publication number: 20200090375
    Abstract: A HUD apparatus that is an AR display apparatus mounted on an on-vehicle system includes: an image selection unit configured to input an image photographed by a camera, select and extract an area of an object from the image; a visibility judgment unit configured to judge visibility of a user with respect to the area of the object on a basis of an index value; an AR image generator unit configured to generate an AR image regarding the object by subjecting the area to image processing for improving the visibility on a basis of the visibility of the area of the object; and an AR display unit configured to superimpose and display the AR image onto a screen. The visibility judgment unit controls whether the AR image is to be displayed or not and content of the image processing to be changed in accordance with the visibility.
    Type: Application
    Filed: March 17, 2017
    Publication date: March 19, 2020
    Inventors: Hiromitsu MORI, Seiji MURATA, Tomoto KAWAMURA
  • Patent number: 10466490
    Abstract: A video projection device 001 includes a video generation section 041 that has a micro display element 003 which generates video and an illuminating optical system 002 which illuminates a micro display element; projection section 043 that project the video which is generated by the video generation section onto the eyes of a user through an eyepiece section; and a mechanical support section 042 that connects the video generation section to the projection section using a housing section. The mechanical support section includes at least one transparent area 011 that is surrounded by the housing section, and penetrates in a direction parallel to a direction in which the video from the projection section is projected. The illuminating optical system includes a light source that emits light in a plurality of wavelength bands, and a controller 440 that controls the output of the light source.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 5, 2019
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Tomoto Kawamura, Toshiteru Nakamura, Yoshiho Seo, Satoshi Ouchi, Hidenao Saito, Yoshio Okamoto, Kenji Kiya
  • Patent number: 10445577
    Abstract: An information display terminal includes an arithmetic unit performing a process that selects a predetermined type of communication unit among a plurality of types of communication units on the basis of, for example, information related to first objects recognized from a captured image, which is stored in advance, and acquires the related information from a predetermined device on the Internet through the communication unit and a process that, when the presence of a second object or a predetermined positional relationship between the first objects and the second object is specified in the captured image, displays the related information of the first objects in a viewing direction, using a display unit.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 15, 2019
    Assignee: Maxell, Ltd.
    Inventors: Satoshi Ouchi, Yoshiho Seo, Yuya Ogi, Tomoto Kawamura, Toshiteru Nakamura
  • Patent number: 10413187
    Abstract: An object of the invention is to provide a technology for further improving scanning performance. Provided is an optical scanning device including: a scanning unit including an optical waveguide configured to guide incident light and emit the light from an emission end, and a vibration unit configured to generate a vibration and vibrate the emission end; and a signal transmission unit configured to transmit a signal to the scanning unit and cause the scanning unit to scan an object, characterized in that the scanning unit includes a first bonding and vibration attenuating unit configured to bond, with an elastic member, an end surface of the vibration unit closer to the emission end and the optical waveguide.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: September 17, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Toshiteru Nakamura, Satoshi Ouchi, Yoshiho Seo, Kouji Fujita, Shinsuke Onoe, Kenichiro Yamada, Tomoto Kawamura
  • Patent number: 10365490
    Abstract: A head-mounted display (101) includes: an imaging assembly (203) imaging scenery seen by a user to generate a source picture; a storage unit (202) storing color correction factors used for correcting brightness of each of a red, green and blue color components included in a picture; a correction picture generator (212) performing color correction processing for enhancing a color component with a relatively low color correction factor stored in the storage unit (202), of the red, green and blue color components forming the source picture, to generate a correction picture; a picture display assembly (207) displaying the correction picture in the field of view of the user under a condition where he/she is able to perceive the outside world; and a special picture processor (213) performing picture processing for overlaying the correction picture and the source picture on each other for display.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: July 30, 2019
    Assignee: Maxell, Ltd.
    Inventors: Shingo Hayashi, Satoshi Ouchi, Yoshiho Seo, Tomoto Kawamura, Seiji Murata, Takahiro Matsuda, Toshiteru Nakamura
  • Patent number: 10303047
    Abstract: The purpose of the present disclosure is to provide a small optical integrator for increasing color mixing property and homogeneity. An optical integrator is provided with a light entrance surface and exit surface (002, 003), and side surfaces (004, 005, 006, 007) that connect the entrance surface and the exit surface, and is internally filled with a light guide material having a refractive index. The light guide material contains scattering particles for scattering light that have a refractive index different from the refractive index of the light guide material. The light that has entered via the entrance surface propagates from the entrance surface side toward the exit surface while being scattered by the scattering particles in the light guide material, wherein part of the scattered light is guided to the exit surface by propagating while being confined, by internal reflection on the side surfaces, in the light detector.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: May 28, 2019
    Assignee: HITACHI CHEMICAL COMPANY, LTD.
    Inventors: Tomoto Kawamura, Toshihiro Kuroda, Daichi Sakai, Toshiyuki Takaiwa, Yutaka Kawakami, Toshiteru Nakamura
  • Publication number: 20190004408
    Abstract: An optical mixer efficiently homogenizes light flux emitted from a plurality of light sources emitting light having different wavelengths to provide a multi-wavelength homogeneous light source. The optical mixer has a columnar shape made of a transparent material, a length of the side surfaces is larger than an outermost diameter of a top surface or a bottom surface of the columnar shape, and a large number of scattering particles scattering light contained inside the optical mixer. The side surface of the optical mixer reflects light, and the top surface and the bottom surface thereof transmit light. Thereby, a function of mixing light incident from the top or bottom surface by the reflecting function of the side surface and the scattering function of the scattering particles is provided.
    Type: Application
    Filed: February 2, 2017
    Publication date: January 3, 2019
    Inventors: Tomoto KAWAMURA, Toshiteru NAKAMURA, Seiji MURATA, Yoshiho SEO, Toshihiro KURODA, Yutaka KAWAKAMI, Daichi SAKAI, Toshiyuki TAKAIWA
  • Publication number: 20180296094
    Abstract: An object of the invention is to provide a technology for further improving scanning performance. Provided is an optical scanning device including: a scanning unit including an optical waveguide configured to guide incident light and emit the light from an emission end, and a vibration unit configured to generate a vibration and vibrate the emission end; and a signal transmission unit configured to transmit a signal to the scanning unit and cause the scanning unit to scan an object, characterized in that the scanning unit includes a first bonding and vibration attenuating unit configured to bond, with an elastic member, an end surface of the vibration unit closer to the emission end and the optical waveguide.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 18, 2018
    Inventors: Toshiteru NAKAMURA, Satoshi OUCHI, Yoshiho SEO, Kouji FUJITA, Shinsuke ONOE, Kenichiro YAMADA, Tomoto KAWAMURA
  • Patent number: 10078236
    Abstract: There are provided a dimmer that can solve practical problems including burn-in and easily change a transmittance to external light and a video display device using the same. A dimmer includes a stack of two or more light control layers that change a transmittance to incident light by controlling an applied voltage in the incident direction of the incident light. A video display device includes a video generator that generates picture light; a video projector that projects the picture light as a virtual image in the field of view of a user; the dimmer disposed on the opposite side of the projecting side of the video projector to the user for adjusting the light quantity of external light to be entered to a user's eye through the video projector; and a light controller that controls the dimmer suitable for the luminosity of external light detected at an external light detector.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: September 18, 2018
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Shingo Hayashi, Satoshi Ouchi, Yoshiho Seo, Tomoto Kawamura, Seiji Murata, Takahiro Matsuda, Toshiteru Nakamura
  • Publication number: 20180203338
    Abstract: To provide an illumination device having high efficiency, an illumination method, a video projection apparatus using the same. In order to achieve the object, there is provided an illumination device configured to include a light source and a light condensing body which condenses light from the light source to be emitted, and the light condensing body includes an incidence surface of a light source side, an emission surface emitting light, and a side surface which is present between the incidence surface and the emission surface, the side surface is a curved surface of which a distance from a light axis in a direction orthogonal to the light emitting surface of the light source at the center of the light source becomes large from the incidence surface toward the emission surface and has a plurality of curved-surface-shapes of which shapes of the curved surfaces are different from each other.
    Type: Application
    Filed: December 11, 2015
    Publication date: July 19, 2018
    Inventors: Tomoto KAWAMURA, Seiji MURATA, Ryuji UKAI, Toshiyuki TAKAIWA, Toshihiro KURODA, Daichi SAKAI, Yutaka KAWAKAMI, Toshiteru NAKAMURA
  • Publication number: 20180129050
    Abstract: A head-mounted display (101) includes: an imaging assembly (203) imaging scenery seen by a user to generate a source picture; a storage unit (202) storing color correction factors used for correcting brightness of each of a red, green and blue color components included in a picture; a correction picture generator (212) performing color correction processing for enhancing a color component with a relatively low color correction factor stored in the storage unit (202), of the red, green and blue color components forming the source picture, to generate a correction picture; a picture display assembly (207) displaying the correction picture in the field of view of the user under a condition where he/she is able to perceive the outside world; and a special picture processor (213) performing picture processing for overlaying the correction picture and the source picture on each other for display.
    Type: Application
    Filed: May 19, 2015
    Publication date: May 10, 2018
    Inventors: Shingo HAYASHI, Satoshi OUCHI, Yoshiho SEO, Tomoto KAWAMURA, Seiji MURATA, Takahiro MATSUDA, Toshiteru NAKAMURA