Patents by Inventor Takeshi Koshihara

Takeshi Koshihara 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: 11132950
    Abstract: Provided is an electro-optical device including a display region including a pixel circuit and a data line corresponding to the pixel circuit, a data line drive circuit configured to output a gradation voltage, and a first capacitor configured to hold a gradation voltage output from the data line drive circuit, and the capacitor is provided in the display region.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 28, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hitoshi Ota, Takeshi Koshihara
  • Publication number: 20210286182
    Abstract: The display device includes the first light-emitting element, a second light-emitting element, a first color filter through which light from the first light-emitting element passes, and a second color filter through which the light from the second light-emitting element passes. The relative positional relationship between the center of the first light-emitting element and the center of the first color filter is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 16, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takeshi KOSHIHARA, Hitoshi OTA
  • Publication number: 20210233965
    Abstract: An electro-optical device includes a first light-emitting element including a first light-emitting region, a second light-emitting element including a second light-emitting region, a first filter, and a second filter. The area of the first light-emitting region is smaller than the area of the second light-emitting region, and a relationship (Lf11-Le11)>(Lf21-Le21) is satisfied when the length of the first light-emitting region is Le11, the length of the second light-emitting region is Le21, the length of the first filter is Lf11, and the length of the second filter is Lf21.
    Type: Application
    Filed: January 28, 2021
    Publication date: July 29, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Jun IROBE, Takeshi KOSHIHARA
  • Publication number: 20210226173
    Abstract: Provided are an optical unit and a display device being able to inhibit unwanted light, which is generated when a dichroic mirror transmits part of color light to be reflected, from being emitted from an emission surface of a dichroic prism. In the optical unit, color filters (a first color filter, a second color filter, and a third color filter) are provided between a dichroic prism and a first panel, a second panel, and a third panel, the color filters selectively transmitting light of wavelengths incident on the dichroic prism from each of the panels. Further, an optical resonator, which has a resonance wavelength corresponding to a wavelength range of image light incident on the dichroic prism from each of the panels, is provided on the first panel, the second panel, and the third panel.
    Type: Application
    Filed: April 6, 2021
    Publication date: July 22, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takeshi KOSHIHARA
  • Publication number: 20210225990
    Abstract: The display device includes a pixel circuit provided corresponding to a data line and a scanning line, the pixel circuit includes first to fourth transistors and a display element, and the first transistor supplies a current in accordance with a voltage between a gate node and a source node to the display element via the fourth transistor, the second transistor is disposed between the data line and the gate node of the first transistor and is turned on and off in accordance with a potential of the scanning line, the third transistor is disposed between the data line and a drain node of the first transistor, and the fourth transistor is disposed between the drain node of the first transistor and the display element.
    Type: Application
    Filed: January 15, 2021
    Publication date: July 22, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takumi KODAMA, Takeshi KOSHIHARA
  • Patent number: 11069882
    Abstract: Provided are an optical unit and a display device being able to inhibit unwanted light, which is generated when a dichroic mirror transmits part of color light to be reflected, from being emitted from an emission surface of a dichroic prism. In the optical unit, color filters (a first color filter, a second color filter, and a third color filter) are provided between a dichroic prism and a first panel, a second panel, and a third panel, the color filters selectively transmitting light of wavelengths incident on the dichroic prism from each of the panels. Further, an optical resonator, which has a resonance wavelength corresponding to a wavelength range of image light incident on the dichroic prism from each of the panels, is provided on the first panel, the second panel, and the third panel.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: July 20, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Takeshi Koshihara
  • Patent number: 11048086
    Abstract: The display device includes the first light-emitting element, a second light-emitting element, a first color filter through which light from the first light-emitting element passes, and a second color filter through which the light from the second light-emitting element passes. The relative positional relationship between the center of the first light-emitting element and the center of the first color filter is different from the relative positional relationship between the center of the second light-emitting element and the center of the second color filter.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: June 29, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takeshi Koshihara, Hitoshi Ota
  • Publication number: 20210193053
    Abstract: A display device includes: a display area including a pixel circuit disposed to correspond to an intersection between a scanning line and a data line; a data signal output circuit configured to output a first data signal; and a first capacitive element including one end and the other end, the one end being supplied with the first data signal, and the other end being coupled to the data line, wherein the display area is disposed between the first capacitive element and the data signal output circuit in plan view.
    Type: Application
    Filed: December 18, 2020
    Publication date: June 24, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Hitoshi OTA, Takeshi KOSHIHARA
  • Publication number: 20210181520
    Abstract: Provided is an optical unit and a display device capable of suppressing the occurrence of stray light by suppressing the incidence of light onto a peripheral region of a panel. In the optical unit, a first panel, a second panel, and a third panel are arranged to face a dichroic prism. A first light-emitting element is provided in a display region of the first panel, the second panel, and the third panel, and metal wiring is provided in a peripheral region. Here, a light shielding layer is provided between the dichroic prism and the peripheral region of each of the first panel, the second panel, and the third panel. Thus, even when a part of color light that should be reflected passes through a dichroic mirror, the leaked light is absorbed by the light shielding layer.
    Type: Application
    Filed: February 25, 2021
    Publication date: June 17, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takeshi KOSHIHARA
  • Patent number: 11029526
    Abstract: Provided are an optical unit and a display device that can appropriately perform reflection and transmission of image light emitted from a panel provided with a light emitting element, over a wide wavelength region in a dichroic mirror. The optical unit includes a first panel, a second panel, and a third panel arranged facing a first incident surface, a second incident surface, and a third incident surface of a dichroic prism, respectively, and each of the first panel, the second panel, and the third panel emits unpolarized image light. A polarization element is arranged between the first panel and the dichroic prism, and first image light emitted from the first panel is incident on the dichroic prism as linearly polarized light. A first dichroic mirror has polarization separation characteristics in addition to transmittance-wavelength characteristics.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: June 8, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takeshi Koshihara, Kunihiko Yano
  • Patent number: 11031441
    Abstract: An electro-optical device includes a first substrate, a second substrate, and a color filter disposed in a layer between the first substrate and the second substrate. An adhesive is disposed in a layer between the color filter and the second substrate. A first overcoat layer is disposed in a layer between the adhesive and the color filter, and a second overcoat layer is disposed in the layer between the adhesive and the color filter and is disposed along the first overcoat layer.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: June 8, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Masanori Iwasaki, Suguru Akagawa, Narumi Ishibashi, Takeshi Koshihara
  • Publication number: 20210167333
    Abstract: A first light-emitting element and a second light-emitting element that have a resonance structure that causes output light from a light-emission functional layer to resonate between a reflective layer and a semi-transmissive reflective layer, and a pixel definition layer, and in which an aperture part is formed to correspond to each of the first light-emitting element and the second light-emitting element, are formed on a base. A first interval between the reflective layer and the semi-transmissive reflective layer in the first light-emitting element and a second interval between the reflective layer and the semi-transmissive reflective layer in the second light-emitting element are different, and a film thickness of the pixel definition layer is less than a difference between the first interval and the second interval.
    Type: Application
    Filed: February 11, 2021
    Publication date: June 3, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Ryoichi NOZAWA, Atsushi AMANO, Takeshi KOSHIHARA, Akio FUKASE, Shinichi IWATA
  • Patent number: 10991779
    Abstract: An electro-optical apparatus includes a first pixel and a second pixel. The first pixel and the second pixel include a reflective layer, an insulating layer, a functional layer, and an opposing electrode. The insulating layer includes a first insulating layer, a second insulating layer having a first opening, and a third insulating layer having a second opening. A first pixel electrode is provided on the first insulating layer in the first opening. A second pixel electrode is provided on the second insulating layer.
    Type: Grant
    Filed: December 2, 2019
    Date of Patent: April 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Ryoichi Nozawa, Takeshi Koshihara, Hisakatsu Sato
  • Patent number: 10976563
    Abstract: Provided is an optical unit and a display device capable of suppressing the occurrence of stray light by suppressing the incidence of light onto a peripheral region of a panel. In the optical unit, a first panel, a second panel, and a third panel are arranged to face a dichroic prism. A first light-emitting element is provided in a display region of the first panel, the second panel, and the third panel, and metal wiring is provided in a peripheral region. Here, a light shielding layer is provided between the dichroic prism and the peripheral region of each of the first panel, the second panel, and the third panel. Thus, even when a part of color light that should be reflected passes through a dichroic mirror, the leaked light is absorbed by the light shielding layer.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: April 13, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Takeshi Koshihara
  • Patent number: 10964260
    Abstract: An electro-optical device is provided that includes a first wiring, a first data line and a second data line, a first pixel circuit coupled to the first data line, a second pixel circuit coupled to the second data line, a first switch having a first end coupled to the first wiring and a second end coupled to the first data line, and a second switch having a first end coupled to the first wiring and a second end coupled to the second data line.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: March 30, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hitoshi Ota, Takeshi Koshihara
  • Patent number: 10957876
    Abstract: A first light-emitting element and a second light-emitting element that have a resonance structure that causes output light from a light-emission functional layer to resonate between a reflective layer and a semi-transmissive reflective layer, and a pixel definition layer, and in which an aperture part is formed to correspond to each of the first light-emitting element and the second light-emitting element, are formed on a base. A first interval between the reflective layer and the semi-transmissive reflective layer in the first light-emitting element and a second interval between the reflective layer and the semi-transmissive reflective layer in the second light-emitting element are different, and a film thickness of the pixel definition layer is less than a difference between the first interval and the second interval.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: March 23, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Ryoichi Nozawa, Atsushi Amano, Takeshi Koshihara, Akio Fukase, Shinichi Iwata
  • Publication number: 20210043811
    Abstract: There is provided an electro-optical device including a light-emitting layer that has a first light-emitting element and a second light-emitting element which are adjacent to each other and a color filter layer that has a first color filter provided corresponding to the first light-emitting element and a second color filter provided corresponding to the second light-emitting element, in which an inter-element distance between the first light-emitting element and the second light-emitting element is 1.5 ?m or less, and a thickness of layer between the light-emitting layer and the color filter layer is 6 times or less the inter-element distance.
    Type: Application
    Filed: October 28, 2020
    Publication date: February 11, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takeshi KOSHIHARA
  • Publication number: 20210041773
    Abstract: An optical module in the present disclosure includes a first image display panel including a first display part and a first coupling part, a second image display panel including a second display part and a second coupling part, a third image display panel including a third display part and a third coupling part, and a cross dichroic prism configured to synthesize first, second, and third image light. The cross dichroic prism has a cross axis at which a two of photosynthesis surfaces cross each other. The first, second, and third image display panel are respectively bonded to different surfaces of the cross dichroic prism in a state where a long side of each of the first, second, and third display part extends along the cross axis and where the first, second, and third coupling part are each positioned on an outer side of the cross dichroic prism.
    Type: Application
    Filed: October 26, 2020
    Publication date: February 11, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Takeshi KOSHIHARA
  • Publication number: 20210028239
    Abstract: A light-emitting device includes a semi-transmissive reflection layer, a first reflection layer that is disposed in a first sub-pixel, a second reflection layer that is disposed in a second sub-pixel, the second sub-pixel that emits same color light as the first sub-pixel, and a light-emitting functional layer that is disposed between the first reflection layer and the semi-transmissive reflection layer and the semi-transmissive reflection layer. A distance between the second reflection layer and the semi-transmissive reflection layer is longer than a distance between the first reflection layer and the semi-transmissive reflection layer.
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Jun IROBE, Takeshi KOSHIHARA
  • Publication number: 20210028238
    Abstract: A light-emitting device includes a semi-transmissive reflection layer, a first reflection layer that is disposed in a first sub-pixel, a first pixel electrode that is disposed in the first sub-pixel, a first color filer that is disposed in the first sub-pixel, a second reflection layer that is disposed in a second sub-pixel, a second pixel electrode that is disposed in the second sub-pixel, a second color filter that is disposed in the second sub-pixel, the second color filter that is same color as the first color filter, a light-emitting functional layer, and an insulating layer that is disposed between the first reflection layer and the first pixel electrode, the light-emitting functional layer that is disposed between the second reflection layer and the second pixel electrode. A thickness of the insulating layer in the second sub-pixel is thicker than a thickness of the insulating layer in the first sub-pixel.
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Takeshi KOSHIHARA, Jun IROBE