Patents by Inventor Akiko Watano

Akiko Watano 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: 20220066264
    Abstract: Provided are an optical element with which reflected light in a narrower wavelength range can be obtained and a wavelength selective filter and a sensor including the same optical element. The optical element includes a cholesteric liquid crystal layer obtained by cholesteric alignment of a liquid crystal compound, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, and the cholesteric liquid crystal layer has a region where a refractive index nx in an in-plane slow axis direction and a refractive index ny in an in-plane fast axis direction satisfy nx>ny.
    Type: Application
    Filed: November 9, 2021
    Publication date: March 3, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Yukito SAITOH, Hiroshi SATO, Katsumi SASATA, Takao TAGUCHI, Akiko WATANO
  • Publication number: 20220066030
    Abstract: Provided is a sensor having a high SN ratio. The sensor includes a light source, a band pass filter; and a light-receiving element, in which the band pass filter includes a cholesteric liquid crystal layer that is a layer obtained by immobilizing a cholesteric liquid crystalline phase, the cholesteric liquid crystal layer has a region where a refractive index nx in an in-plane slow axis direction and a refractive index ny in an in-plane fast axis direction satisfy nx>ny, and in a case where a selective reflection wavelength of the cholesteric liquid crystal layer is represented by ?, the cholesteric liquid crystal layer has a second selective reflection peak at a wavelength ?/2 and a half-width of the second selective reflection peak at ?/2 is 30 nm or less.
    Type: Application
    Filed: November 9, 2021
    Publication date: March 3, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Takao TAGUCHI, Yukito SAITOH, Hiroshi SATO, Katsumi SASATA, Akiko WATANO
  • Publication number: 20200310195
    Abstract: A wavelength conversion member suppresses peeling at an edge at cutting; and is used with a backlight unit and a liquid crystal display device. The wavelength conversion member includes a first substrate, a wavelength conversion layer, and a second substrate, in which each of the first and second substrates includes a support, a barrier layer, and an organic layer, where each of the barrier layers contains at least aluminum and phosphorus, each of the organic layers is formed of a composition containing a polymer A having a glass transition temperature of 50° C. or lower and a polymer B having an acryloyl or methacryloyl group in a molecule thereof, and the wavelength conversion layer is a layer in which at least one selected from the group consisting of a quantum dot, a phosphor particle, and a phosphor coloring agent is dispersed in a matrix made of an acrylic resin.
    Type: Application
    Filed: June 16, 2020
    Publication date: October 1, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Akiko WATANO, Tatsuya OBA, Hirofumi TOYAMA, Takashi YONEMOTO
  • Patent number: 10663800
    Abstract: An optical sheet member includes a polarizing plate including a polarizer (A); an optical conversion member (D); and a brightness enhancement film including a reflection polarizer (B), wherein the brightness enhancement film has a reflection center wavelength range of 300 nm to 430, and the optical conversion member (D) converts a part or all of UV light which is transmitted through polarizer (B) and is incident on the optical conversion member (D), and has an emission center wavelength range of 300 nm to 430 nm and which has an emission center wavelength range of 430 nm to 480 nm, green light which has an emission center wavelength range of 500 nm to 600 nm, and red light which has an emission center wavelength range of 600 nm to 700 nm.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: May 26, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Katsufumi Ohmuro, Yukito Saitoh, Akiko Watano
  • Publication number: 20200032137
    Abstract: Provided is an organic electroluminescent display device that further suppresses reflection of external light when viewed in an oblique direction; a phase difference film; and a circularly polarizing plate. This display device has an organic electroluminescent display panel, and a circularly polarizing plate arranged on the display panel, in which the circularly polarizing plate has a polarizer and a phase difference film, the phase difference film has, from a side of the polarizer, a negative A-plate, and a positive A-plate, the in-plane retardation of the negative A-plate at a wavelength of 550 nm is more than 50 nm and less than 90 nm, and the in-plane retardation of the positive A-plate at a wavelength of 550 nm is 100 to 200 nm, and the angle formed by the in-plane slow axis of the negative A-plate and the in-plane slow axis of the positive A-plate is 45°±10°.
    Type: Application
    Filed: October 2, 2019
    Publication date: January 30, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Akiko WATANO, Tatsuya OBA, Hirofumi TOYAMA
  • Publication number: 20190204646
    Abstract: An optical sheet member includes a polarizing plate including a polarizer (A); an optical conversion member (D); and a brightness enhancement film including a reflection polarizer (B), wherein the brightness enhancement film has a reflection center wavelength range of 300 nm to 430, and the optical conversion member (D) converts a part or all of UV light which is transmitted through polarizer (B) and is incident on the optical conversion member (D), and has an emission center wavelength range of 300 nm to 430 nm and which has an emission center wavelength range of 430 nm to 480 nm, green light which has an emission center wavelength range of 500 nm to 600 nm, and red light which has an emission center wavelength range of 600 nm to 700 nm.
    Type: Application
    Filed: March 5, 2019
    Publication date: July 4, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Katsufumi OHMURO, Yukito SAITOH, Akiko WATANO
  • Patent number: 10281769
    Abstract: An optical sheet member includes a polarizing plate including a polarizer (A); an optical conversion member (D); and a brightness enhancement film including a reflection polarizer (B), in which the brightness enhancement film has a reflection center wavelength range of 400 nm to 500 nm, and the optical conversion member (D) converts a part of blue light which is transmitted through polarizer (B) and is incident on the optical conversion member (D), and has an emission center wavelength range of 400 nm to 500 nm and which has an emission center wavelength range of 500 nm to 600 nm and red light which has an emission center wavelength range of 600 nm to 700 nm, and transmits a part of the blue light. When the optical sheet member is incorporated in an image display device, front brightness, contrast, and a color reproducing region are enhanced, and color unevenness is reduced.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: May 7, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Katsufumi Ohmuro, Yukito Saitoh, Akiko Watano
  • Patent number: 10139535
    Abstract: The present invention provides a light polarization film capable of suppressing a decrease in light emission efficiency even when the film is continuously irradiated with light and suppressing a change in degree of polarization even under a wet heat environment, a method for manufacturing the same, a laminate, and a method for manufacturing the same. The light polarization film of the present invention includes a polymer, and quantum rods, in which the quantum rods are aligned such that a major axis of each of the quantum rods is parallel to one direction parallel to a surface of the light polarization film, a moisture content is 1.0% or less, and an oxygen permeability coefficient is 200 cc·20 ?m/m2·day·atm or less.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: November 27, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Akiko Watano, Toshio Hara, Hideaki Ito, Yukito Saitoh, Yujiro Yanai
  • Patent number: 10001674
    Abstract: Provided are a brightness enhancement film including a ?/4 plate, and a reflection polarizer, in which the reflection polarizer includes at least two light reflection layers formed by immobilizing a cholesteric liquid crystalline phase, one light reflection layer of the reflection layers is a layer formed of a polymerizable liquid crystal composition containing a rod-like liquid crystal compound, and the other light reflection layer is a layer formed of a polymerizable liquid crystal composition containing a disk-like liquid crystal compound, and an optical sheet member including the brightness enhancement film, and a liquid crystal display device including the optical sheet member. The brightness enhancement film of the present invention has high brightness and is able to suppress an oblique change in the shade at the time of being incorporated in a liquid crystal display device.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: June 19, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Jun Takeda, Yuki Matsuda, Nobuyuki Akutagawa, Kotaro Yasuda, Katsufumi Ohmuro, Hideyuki Nishikawa, Akiko Watano, Yukito Saitoh, Mitsuyoshi Ichihashi, Wataru Hoshino, Hiroyuki Ishikawa
  • Patent number: 10001673
    Abstract: An optical sheet member includes a polarizing plate including a polarizer, a brightness enhancement film including a reflection polarizer, and a ?/4 plate, in which the reflection polarizer includes a first light reflecting layer which has a reflection center wavelength range of 430 nm to 480 nm, and is formed by fixing a cholesteric liquid crystalline phase emitting circular polarization light, a second light reflecting layer which has a reflection center wavelength range of 500 nm to 600 nm, and a third light reflecting layer which has a reflection center wavelength range of 600 nm to 650 nm, and both formed by fixing a cholesteric liquid crystalline phase emitting circular polarization light, and the brightness enhancement film includes the ?/4 plate satisfying 550 nm/4?25 nm<Re(550)<550 nm/4+25 nm between the polarizer and the reflection polarizer.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: June 19, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Katsufumi Ohmuro, Akiko Watano, Hiroshi Sato
  • Publication number: 20180143363
    Abstract: To provide a mirror with an image display function which is capable of displaying a brighter image and has excellent view angle characteristics. A mirror with an image display function includes an image display device, a ¼ wavelength plate, and a circular polarization reflection layer in this order, the circular polarization reflection layer includes a cholesteric liquid crystal layer of which a central wavelength of a selective reflection band is positioned in a visible light region, and at least one of the ¼ wavelength plate or the circular polarization reflection layer includes a layer formed of a liquid crystal composition containing a disk-like liquid crystal compound.
    Type: Application
    Filed: December 29, 2017
    Publication date: May 24, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Mitsuyoshi ICHIHASHI, Akiko WATANO, Yukito SAITOH
  • Patent number: 9933619
    Abstract: The present invention provides a member for projection image display, including a reflection layer and a retardation layer, wherein the reflection layer includes a cholesteric liquid crystal layer exhibiting selective reflection in a visible light region, the cholesteric liquid crystal layer is a layer formed from a liquid crystal composition containing a discotic liquid crystal compound, and a front phase difference of the retardation layer is in a range of 50 nm to 400 nm; and a projection image display system which includes the above member for projection image display, wherein the retardation layer is disposed on an incident light side relative to the reflection layer, and the incident light is p-polarized light that vibrates in a direction parallel to a plane of incidence, which is capable of displaying a clear image having high reflectance and high transmittance, without a problem of a double image.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: April 3, 2018
    Assignee: FUJIFILM CORPORATION
    Inventors: Akiko Watano, Yujiro Yanai, Yukito Saitoh, Mitsuyoshi Ichihashi
  • Patent number: 9915837
    Abstract: Provided is a liquid crystal display device including a liquid crystal cell, a backlight side polarizer, an optical thin film which forms an air interface, and a backlight unit, in this order. The liquid crystal display device satisfies n (535)<nu (535) and n (535)×d is 1.15-1.25 ?m, 1.42-1.52 ?m or 1.69-1.79 ?m in which n (535) and nu (535) represent a refractive index of the optical thin film and a layer directly adjacent to the optical thin film, respectively, and d represents a thickness of the optical thin film. The liquid crystal display device is capable of matching a peak of light transmittance to light emission peak wavelength of emission line light of RGB. The layer directly adjacent to the optical thin film is the backlight side polarizer or the substrate.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: March 13, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Katsufumi Ohmuro, Akiko Watano
  • Patent number: 9829615
    Abstract: The present invention provides a luminance-enhancing film including a ?/4 plate, and a reflection polarizer, including a first light reflection layer, a second light reflection layer, and a third light reflection layer from the ?/4 plate side sequentially, the light reflection layers being light reflection layers formed by fixing a cholesteric liquid crystalline phase, and including blue, green and red light reflection layers, and Rth(550) of the first light reflection layer and Rth(550) of the second light reflection layer having inverse signs; and a luminance-enhancing film including a ?/4 plate and a reflection polarizer including at least a light reflection layer formed of a rod-like cholesteric liquid crystal material and a light reflection layer formed of a disk-like cholesteric liquid crystal material. The luminance-enhancing film has high luminance and is able to suppress an oblique change in the color.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: November 28, 2017
    Assignee: FUJIFILM CORPORATION
    Inventors: Akiko Watano, Yukito Saitoh, Katsufumi Ohmuro, Mitsuyoshi Ichihashi, Hiroyuki Ishikawa, Kotaro Yasuda, Hideyuki Nishikawa, Yuki Matsuda, Wataru Hoshino
  • Patent number: 9753198
    Abstract: The light emitting screen of the present invention includes: a blue light emitting layer emitting blue light by being excited with first excitation light; a green light emitting layer which is disposed on the blue light emitting layer and emits green light by being excited with second excitation light; a red light emitting layer which is disposed on the green light emitting layer and emits red light by being excited with third excitation light; a first selective reflection layer which is disposed between the blue light emitting layer and the green light emitting layer; and a second selective reflection layer which is disposed between the green light emitting layer and the red light emitting layer, wherein the blue light emitting layer, the green light emitting layer, and the red light emitting layer contain quantum rods or quantum dots.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: September 5, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Yujiro Yanai, Akiko Watano, Takashi Yonemoto
  • Patent number: 9638953
    Abstract: Provided is a liquid crystal display device including a viewer-side polarizing plate 1, a liquid crystal cell 11, a backlight-side polarizing plate 21, and a backlight unit 31; in which a three-wavelength (RGB) backlight light source having a narrow half bandwidth of the light emission intensity spectrum is used, and the viewer-side polarizing plate includes, for example, a first absorption material which has a maximum value of absorbance in a wavelength range of 470 nm to 510 nm and has a peak of the absorbance full width at half maximum of which is 50 nm or lower.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 2, 2017
    Assignee: FUJIFILM CORPORATION
    Inventors: Akiko Watano, Yukito Saitoh, Katsufumi Ohmuro, Mitsuyoshi Ichihashi
  • Patent number: 9632229
    Abstract: A liquid crystal display device having high transmittance and a high color reproduction region, which includes a backlight unit including a light conversion member; and a liquid crystal cell and in which the light conversion member includes a light conversion layer containing a fluorescent material and an optical film arranged on both surfaces of the light conversion layer, the optical film includes an optical thin film forming an air interface, and a layer directly adjacent to the optical thin film, the liquid crystal display device satisfies n(535)<nu(535), n(535)×d is in a specific range, transmittance of a laminated body of the optical thin film and the layer directly adjacent to the optical thin film is in a specific range, and the backlight unit emits blue light, green light, and red light.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: April 25, 2017
    Assignee: FUJIFILM CORPORATION
    Inventors: Naoyoshi Yamada, Tatsuya Oba, Yukito Saitoh, Katsufumi Ohmuro, Akiko Watano
  • Publication number: 20170102490
    Abstract: The present invention provides a light conversion film capable of suppressing a decrease in light emission efficiency even when the film is continuously irradiated with light and suppressing a change in degree of polarization even under a wet heat environment, a method for manufacturing the same, a laminate, and a method for manufacturing the same. The light conversion film of the present invention includes a polymer, and quantum rods, in which the quantum rods are aligned such that a major axis of each of the quantum rods is parallel to one direction parallel to a surface of the light conversion film, a moisture content is 1.0% or less, and an oxygen permeability coefficient is 200 cc·20 ?m/m2·day·atm or less.
    Type: Application
    Filed: December 22, 2016
    Publication date: April 13, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Akiko WATANO, Toshio HARA, Hideaki ITO, Yukito SAITOH, Yujiro YANAI
  • Publication number: 20160342003
    Abstract: Provided are a brightness enhancement film including a ?/4 plate, and a reflection polarizer, in which the reflection polarizer includes at least two light reflection layers formed by immobilizing a cholesteric liquid crystalline phase, one light reflection layer of the reflection layers is a layer formed of a polymerizable liquid crystal composition containing a rod-like liquid crystal compound, and the other light reflection layer is a layer formed of a polymerizable liquid crystal composition containing a disk-like liquid crystal compound, and an optical sheet member including the brightness enhancement film, and a liquid crystal display device including the optical sheet member. The brightness enhancement film of the present invention has high brightness and is able to suppress an oblique change in the shade at the time of being incorporated in a liquid crystal display device.
    Type: Application
    Filed: August 8, 2016
    Publication date: November 24, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Jun TAKEDA, Yuki MATSUDA, Nobuyuki AKUTAGAWA, Kotaro YASUDA, Katsufumi OHMURO, Hideyuki NISHIKAWA, Akiko WATANO, Yukito SAITOH, Mitsuyoshi ICHIHASHI, Wataru HOSHINO, Hiroyuki ISHIKAWA
  • Publication number: 20160170114
    Abstract: The present invention provides a luminance-enhancing film including a ?/4 plate, and a reflection polarizer, including a first light reflection layer, a second light reflection layer, and a third light reflection layer from the ?/4 plate side sequentially, the light reflection layers being light reflection layers formed by fixing a cholesteric liquid crystalline phase, and including blue, green and red light reflection layers, and Rth(550) of the first light reflection layer and Rth(550) of the second light reflection layer having inverse signs; and a luminance-enhancing film including a ?/4 plate and a reflection polarizer including at least a light reflection layer formed of a rod-like cholesteric liquid crystal material and a light reflection layer formed of a disk-like cholesteric liquid crystal material. The luminance-enhancing film has high luminance and is able to suppress an oblique change in the color.
    Type: Application
    Filed: February 24, 2016
    Publication date: June 16, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Akiko WATANO, Yukito SAITOH, Katsufumi OHMURO, Mitsuyoshi ICHIHASHI, Hiroyuki ISHIKAWA, Kotaro YASUDA, Hideyuki NISHIKAWA, Yuki MATSUDA, Wataru HOSHINO