Patents by Inventor Koya Shiratori

Koya Shiratori 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: 20210294192
    Abstract: A wavelength conversion element according to the present disclosure includes a substrate, a reflecting layer, a wavelength conversion layer which is disposed on the reflecting layer, and which is configured to convert light in a first wavelength band into light in a second wavelength band, a structure which is disposed on the wavelength conversion layer, and which is configured to scatter the light in the first wavelength band, and an optical layer which is disposed on the structure, and which is configured to reflect a part of the light in the first wavelength band, transmit another part of the light in the first wavelength band, and transmit the light in the second wavelength band, wherein the optical layer is different in reflectance with respect to the light in the first wavelength band in accordance with an incidence angle of the light in the first wavelength band entering the optical layer.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 23, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Mizuha HIROKI, Ryuta KOIZUMI, Tetsuo SHIMIZU
  • Publication number: 20210286253
    Abstract: A wavelength conversion element according to the present disclosure includes a substrate, a dichroic layer provided to a first surface of the substrate, an intermediate layer disposed so as to be opposed to the substrate via the dichroic layer, and a wavelength conversion layer disposed so as to be opposed to the dichroic layer via the intermediate layer, and configured to convert light in a first wavelength band into light in a second wavelength band. The dichroic layer has two or more types of refractive index layers having respective refractive indexes different from each other.
    Type: Application
    Filed: March 11, 2021
    Publication date: September 16, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Wataru YASUMATSU, Takashi GOKUDEN, Kunihiko YANO
  • Patent number: 11069874
    Abstract: An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: July 20, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Koya Shiratori, Yuki Hanamura, Tsutomu Asakawa
  • Publication number: 20210165312
    Abstract: Alight source device according to the present disclosure includes a light source section configured to emit first light in a first wavelength band, a first optical element configured to collect the first light emitted from the light source section, a second optical element having a first plane of incidence and a first exit surface, and a wavelength conversion element having a second plane of incidence and a second exit surface, and configured to convert the first light entering the wavelength conversion element through the second plane of incidence into second light having a second wavelength band, wherein the second optical element and the wavelength conversion element are disposed in a state in which the first exit surface and the second plane of incidence are opposed to each other at a distance from each other, and the second plane of incidence is larger in size than the first exit surface.
    Type: Application
    Filed: November 27, 2020
    Publication date: June 3, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Wataru YASUMATSU, Tomoko AKAGAWA, Koya SHIRATORI
  • Publication number: 20210074942
    Abstract: An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.
    Type: Application
    Filed: November 3, 2020
    Publication date: March 11, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Yuki HANAMURA, Tsutomu ASAKAWA
  • Patent number: 10859899
    Abstract: A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer and contains a first metal or a second inorganic oxide that is different from the first inorganic oxide, and a third layer which is provided facing the second layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: December 8, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kunihiko Takagi, Kunihiko Yano, Tomohiro Yokoo, Wataru Yasumatsu, Tetsuo Shimizu, Shinichi Yotsuya, Koya Shiratori
  • Publication number: 20200313109
    Abstract: An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 1, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Yuki HANAMURA, Tsutomu ASAKAWA
  • Publication number: 20200310146
    Abstract: A display device according to the present disclosure includes an imaging light generating device configured to emit imaging light, a first diffraction element configured to diffract the imaging light emitted from the imaging light generating device, a second diffraction element configured to diffract the imaging light diffracted by the first diffraction element to form an exit pupil, and an optical filter disposed between the imaging light generating device and the exit pupil, and configured to attenuate a band on a short wavelength side of a peak wavelength of red light included in the imaging light emitted from the imaging light generating device.
    Type: Application
    Filed: March 24, 2020
    Publication date: October 1, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Masatoshi YONEKUBO, Koya SHIRATORI
  • Patent number: 10720595
    Abstract: An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: July 21, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Koya Shiratori, Yuki Hanamura, Tsutomu Asakawa
  • Publication number: 20200220109
    Abstract: An organic EL device as an the electro-optical device includes a reflective layer; an opposite electrode as a semitransparent reflective layer; and a first luminescence pixel and a second luminescence pixel as first pixels, and a third luminescence pixel as a second pixel respectively having an optical path length adjustment layer and a functional layer provided between the reflective layer and the opposite electrode; in which the optical path length adjustment layer of the first luminescence pixel includes a fourth insulation layer as a luminance adjustment layer and the optical path length adjustment layer of the third luminescence pixel does not include a third insulation layer.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 9, 2020
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Koya SHIRATORI
  • Patent number: 10658620
    Abstract: An organic EL device as an the electro-optical device includes a reflective layer; an opposite electrode as a semitransparent reflective layer; and a first luminescence pixel and a second luminescence pixel as first pixels, and a third luminescence pixel as a second pixel respectively having an optical path length adjustment layer and a functional layer provided between the reflective layer and the opposite electrode; in which the optical path length adjustment layer of the first luminescence pixel includes a fourth insulation layer as a luminance adjustment layer and the optical path length adjustment layer of the third luminescence pixel does not include a third insulation layer.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: May 19, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Koya Shiratori
  • Patent number: 10627405
    Abstract: A detection device includes a light source which emits light, a lens, a light transmissive protecting plate, a length between the light source and the light transmissive protecting plate being larger than a length between the lens and the light transmissive protecting plate, and a light receiving element which receives the light. An angle formed by an optical axis of the lens and the light transmissive protecting plate is smaller than an angle formed by an optical axis of the light source and the transmissive protecting plate.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: April 21, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yoshihiko Momose, Hidekazu Kobayashi, Koya Shiratori, Takashi Toya, Makoto Katase
  • Patent number: 10431775
    Abstract: An organic EL device has at least a first pixel and a second pixel different in the optical path length, in which the first pixel and the second pixel have a reflective layer, a protective layer, an optical path length adjusting layer, a first electrode, a light emitting function layer, and a second electrode, and the optical path length adjusting layer is an insulating layer and has a refractive index higher than a refractive index of the protective layer.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: October 1, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Koya Shiratori, Takeshi Koshihara, Ryoichi Nozawa
  • Publication number: 20190189965
    Abstract: An organic EL device as an the electro-optical device includes a reflective layer; an opposite electrode as a semitransparent reflective layer; and a first luminescence pixel and a second luminescence pixel as first pixels, and a third luminescence pixel as a second pixel respectively having an optical path length adjustment layer and a functional layer provided between the reflective layer and the opposite electrode; in which the optical path length adjustment layer of the first luminescence pixel includes a fourth insulation layer as a luminance adjustment layer and the optical path length adjustment layer of the third luminescence pixel does not include a third insulation layer.
    Type: Application
    Filed: February 21, 2019
    Publication date: June 20, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Koya SHIRATORI
  • Patent number: 10269882
    Abstract: Provided is an organic EL device including a first substrate, a first organic EL element and a second organic EL element which is provided on the first substrate, a sealing layer which covers the first organic EL element and the second organic EL element, and a color filter which is provided on the sealing layer. The color filter includes a coloring layer overlapping the first organic EL element in a planar view, and a resin layer overlapping the second organic EL element in a planar view.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: April 23, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Yuki Hanamura, Koya Shiratori, Takeshi Koshihara
  • Patent number: 10263218
    Abstract: An organic EL device as an the electro-optical device includes a reflective layer; an opposite electrode as a semitransparent reflective layer; and a first luminescence pixel and a second luminescence pixel as first pixels, and a third luminescence pixel as a second pixel respectively having an optical path length adjustment layer and a functional layer provided between the reflective layer and the opposite electrode; in which the optical path length adjustment layer of the first luminescence pixel includes a fourth insulation layer as a luminance adjustment layer and the optical path length adjustment layer of the third luminescence pixel does not include a third insulation layer.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 16, 2019
    Assignee: SEIKO EPSON CORPORTION
    Inventor: Koya Shiratori
  • Publication number: 20190041733
    Abstract: A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer and contains a first metal or a second inorganic oxide that is different from the first inorganic oxide, and a third layer which is provided facing the second layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer.
    Type: Application
    Filed: July 31, 2018
    Publication date: February 7, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kunihiko TAKAGI, Kunihiko YANO, Tomohiro YOKOO, Wataru YASUMATSU, Tetsuo SHIMIZU, Shinichi YOTSUYA, Koya SHIRATORI
  • Publication number: 20190011453
    Abstract: A detection device includes a light source which emits light, a lens, a light transmissive protecting plate, a length between the light source and the light transmissive protecting plate being larger than a length between the lens and the light transmissive protecting plate, and a light receiving element; which receives the light. An angle formed by an optical axis of the lens and the light transmissive protecting plate is smaller than an angle formed by an optical axis of the light source and the transmissive protecting plate.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 10, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Yoshihiko MOMOSE, Hidekazu KOBAYASHI, Koya SHIRATORI, Takashi TOYA, Makoto KATASE
  • Publication number: 20180233692
    Abstract: An organic EL element includes a pixel electrode, a light emitting function layer that is formed on the pixel electrode, an electron injection layer formed on the light emitting function layer, and a counter electrode that is formed on the electron injection layer and that has semi-transmissive reflectivity, in which the counter electrode contains a reductive material that reduces material of the electron injection layer and Ag with atomic ratio of 75% or more, and an adsorption layer is formed on the counter electrode.
    Type: Application
    Filed: April 12, 2018
    Publication date: August 16, 2018
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koya SHIRATORI, Yuki HANAMURA, Tsutomu ASAKAWA
  • Patent number: 9972808
    Abstract: There is provided a display device including an element substrate that has a display area; and a counter substrate. When it is assumed that the length of the shortest edge of the display area is X1, the length of a longest diagonal line of the display area is X3, the thickness of the counter substrate is L1, the refraction index of the counter substrate is n1, the refractive index of the air is n2, and the minimum value of an angle, which is generated between a progress direction of light emitted from the organic EL elements and a normal vector direction is totally reflected in the surface, is ?, the relationship of X1/(2 tan ?)?L1?X3/(tan ?) is realized.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: May 15, 2018
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Koya Shiratori, Takeshi Koshihara