Patents by Inventor YUSUKE SAKAKIBARA
YUSUKE SAKAKIBARA 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).
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Patent number: 11971568Abstract: A polarizing plate may have high transmittance characteristics and suppressed reflected light. An optical device may be provided with the polarizing plate. The polarizing plate may have a wire grid structure that includes a transparent substrate and grid-like projection portions arranged on the transparent substrate at a pitch shorter than the wavelength of light in a used bandwidth and extending in a predetermined direction. The grid-like projection portions may each have a reflective layer and a dielectric layer in order from the transparent substrate side. When viewed from the predetermined direction, the reflective layer has may have a step on the side thereof and may have the largest bottom width on the transparent substrate side.Type: GrantFiled: May 20, 2019Date of Patent: April 30, 2024Assignee: Dexerials CorporationInventors: Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno, Akio Takada
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Patent number: 11966068Abstract: Provided is a structural birefringence-type inorganic wave plate having excellent heat resistance and durability, and a fine pattern. Also provided is a manufacturing method for an inorganic wave plate by which, even in the case of a fine pattern, productivity is high, and a desired phase difference is easily achieved and stably obtained. This inorganic wave plate is obtained by utilizing a selective interaction between a polymer having a repeating unit containing a carbonyl group, and a metallic oxide precursor, the inorganic wave plate having a wire grid structure provided with a transparent substrate, and grid-shaped protruding portions arranged at a pitch shorter than the wavelength of light in a used band on at least one surface of the transparent substrate and extending in a predetermined direction, the main component of the grid-shaped protruding portion being a metallic oxide.Type: GrantFiled: May 7, 2019Date of Patent: April 23, 2024Assignee: Dexerials CorporationInventors: Akio Takada, Kazuyuki Shibuya, Shigeshi Sakakibara, Toshiaki Sugawara, Yusuke Matsuno
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Publication number: 20240107792Abstract: A light-emitting element includes an anode electrode, a cathode electrode, and a QD layer provided between the anode electrode and the cathode electrode, the QD layer containing the QDs. The QDs are AgInxGa1-xSySe1-y-based or ZnAgInxGa1-xSySe1-y-based Cd-free QDs (0?x<1, 0?y?1) and exhibit fluorescence characteristics having a fluorescent half width of 45 nm or less and a fluorescence quantum yield of 35% or more in a green wavelength region to a red wavelength region.Type: ApplicationFiled: February 18, 2021Publication date: March 28, 2024Inventors: Kazuki GOTO, YUSUKE SAKAKIBARA, Yuma YAGUCHI, Keisuke KITANO, Masaki YAMAMOTO, Soichiro NIKATA, Yoko MICHIWAKI, Yuko OGURA, Vit KALOUSEK, Akio MISHIMA
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Publication number: 20240090277Abstract: A display device includes: a light-emitting element provided on a substrate, and including a first electrode that reflects visible light, a second electrode that transmits visible light, and a light-emitting layer provided between the first electrode and the second electrode; a subpixel that is a light-emitting region in plan view of the light-emitting element; a polarizing plate provided on the light-emitting element disposed in a light emission direction in which light is emitted from the light-emitting element, the polarizing plate partially overlapping with the subpixel in plan view; and a light-blocking layer provided at least partially around the subpixel and raised higher in the light emission direction than the polarizing plate.Type: ApplicationFiled: February 4, 2021Publication date: March 14, 2024Inventor: YUSUKE SAKAKIBARA
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Patent number: 11869430Abstract: A pixel is divided into a first subpixel and a second subpixel. A first data signal is input to a first drive unit that drives a first light-emitting element constituting the first subpixel, and a second data signal is input to a second drive unit that drives a second light-emitting element constituting the second subpixel. A gray scale value of the first data signal is smaller than a gray scale value of the second data signal.Type: GrantFiled: January 24, 2020Date of Patent: January 9, 2024Assignee: SHARP KABUSHIKI KAISHAInventor: Yusuke Sakakibara
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Publication number: 20230422553Abstract: A display device includes a plurality of light-emitting elements each including: a first electrode; a second electrode; and a light-emitting layer between the first electrode and the second electrode, the plurality of light-emitting elements including: at least one main light-emitting element containing quantum dots in the light-emitting layer; and at least one set of compact light-emitting elements including a plurality of compact light-emitting elements smaller than the at least one main light-emitting element.Type: ApplicationFiled: November 30, 2020Publication date: December 28, 2023Inventors: YUSUKE SAKAKIBARA, Masumi KUBO
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Publication number: 20230403930Abstract: A light-emitting element according to the disclosure includes, in the recited order, an anode, a blue light-emitting layer, an electron transport layer and a cathode, wherein the electron transport layer includes a nanoparticle containing a metal oxide, and a ligand containing a thiol group.Type: ApplicationFiled: October 30, 2020Publication date: December 14, 2023Inventors: YUSUKE SAKAKIBARA, Yuma YAGUCHI
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Publication number: 20230337455Abstract: A light-emitting element includes: a cathode; an anode; and an electron-transport layer, a light-emitting layer, and a hole-transport layer provided, between the cathode and the anode, in a stated order from the cathode. At least one of the electron-transport layer or the hole-transport layer includes: a first charge-transport layer and a second charge-transport layer containing different carrier-transport materials. The light-emitting element includes, in plan view, a first region including the first charge-transport layer, and a second region including the second charge-transport layer. The light-emitting element shares the anode and the cathode between the first region and the second region.Type: ApplicationFiled: October 15, 2019Publication date: October 19, 2023Inventor: YUSUKE SAKAKIBARA
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Publication number: 20230337456Abstract: A light-emitting element includes: a first electrode having a reflective surface that reflects light; a second electrode that transmits light; and a light-emitting layer between the first electrode and the second electrode, the light-emitting layer containing a first light-emitting material that emits first light that has a peak wavelength equal to a first wavelength and a second light-emitting material that emits second light that has a peak wavelength equal to a second wavelength shorter than the first wavelength, wherein the second light has at least one location where intensity is higher in a direction off a normal to the reflective surface than in the normal.Type: ApplicationFiled: August 28, 2020Publication date: October 19, 2023Inventors: YUSUKE SAKAKIBARA, Masaki YAMAMOTO
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Publication number: 20230292541Abstract: An electron transport layer of a display device includes a mixture in which a first material and a second material are mixed, an electron affinity of a first light-emitting layer is equal to or smaller than an electron affinity of the first material, an electron affinity of the second material is smaller than the electron affinity of the first material, and an electron affinity of a second light-emitting layer is equal to or smaller than the electron affinity of the second material.Type: ApplicationFiled: June 22, 2020Publication date: September 14, 2023Inventors: SHINICHI HANDA, YUSUKE SAKAKIBARA
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Publication number: 20230247848Abstract: A light-emitting layer included in a light-emitting element according to the disclosure contains a plurality of red quantum dots that emit red light, a plurality of green quantum dots that emit green light, and a plurality of blue quantum dots that emit blue light. The surface-to-surface distance between the red quantum dots adjacent to each other is longer than the surface-to-surface distance between the green quantum dots adjacent to each other, and the surface-to-surface distance between the green quantum dots adjacent to each other is longer than the surface-to-surface distance between the blue quantum dots adjacent to each other.Type: ApplicationFiled: June 1, 2020Publication date: August 3, 2023Inventors: TATSUYA RYOHWA, KANAKO NAKATA, YUSUKE SAKAKIBARA, MAKOTO IZUMI
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Publication number: 20230186804Abstract: An inspection circuit in a display device includes: a measuring circuit configured to sweep a voltage to the display device and to measure a current value that flows in a light-emitting element in response to a voltage value applied; a computation circuit configured to compute a first derivative value of the current value with respect to the voltage value, the first derivative value representing voltage dependence of a first derivative of the current value; a peak determination circuit configured to determine a peak of the first derivative value; and a processing circuit configured to process the light-emitting element based on a result of the determination by the peak determination circuit.Type: ApplicationFiled: April 8, 2020Publication date: June 15, 2023Inventors: HIROHISA YAMADA, Keisuke KITANO, YUSUKE SAKAKIBARA
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Publication number: 20230180532Abstract: A display device includes a plurality of light-emitting layers each capable of emitting light in a reference direction orthogonal to a light-emitting surface, and a light-blocking portion capable of blocking part of light traveling from the light-emitting surface in directions inclined with respect to the reference direction. The plurality of light-emitting layers include a first light-emitting layer capable of emitting light with a first peak wavelength and a second light-emitting layer capable of emitting light with a second peak wavelength that is longer than the first peak wavelength. The first light-emitting layer has, compared with the second light-emitting layer, a large ratio of the part of light that can be blocked by the light-blocking portion to light traveling in at least one certain direction out of the inclined directions.Type: ApplicationFiled: July 6, 2020Publication date: June 8, 2023Inventor: YUSUKE SAKAKIBARA
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Publication number: 20230110156Abstract: A display device including a light-emitting element including a first electrode, a second electrode a light-emitting layer, a first charge transport layer having a function of transporting first charge, and a second charge transport layer having a function of transporting second charge, in which the display device includes a first inspection element including a fourth electrode and a third electrode. The first inspection element is a single-charge element including the light-emitting layer and the first charge transport layer that are common to the light-emitting element and making mainly the first charge flow, and the light-emitting element is driven in accordance with characteristics of the first inspection element.Type: ApplicationFiled: April 14, 2020Publication date: April 13, 2023Inventor: YUSUKE SAKAKIBARA
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Publication number: 20230113212Abstract: A method of manufacturing a display device includes: the measurement step of sweeping a voltage to light-emitting elements and measuring a current value that flows in the light-emitting elements in response to a voltage value applied; the computation step of computing a first derivative value of the current value with respect to the voltage value, the first derivative value representing voltage dependence of a first derivative of the current value; the peak determination step of determining a peak of the first derivative value; the processing step of processing the light-emitting elements based on a result of the peak determination step; and the attaching step of attaching a housing to the substrate.Type: ApplicationFiled: April 8, 2020Publication date: April 13, 2023Applicant: SHARP KABUSHIKI KAISHAInventors: HIROHISA YAMADA, Keisuke KITANO, YUSUKE SAKAKIBARA
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Publication number: 20230080877Abstract: The electroluminescent element includes an anode electrode, a cathode electrode, and a quantum dot (QD) layer including quantum dots and arranged between the anode electrode and the cathode electrode. The quantum dots are Cd-free quantum dots that include at least Zn and Se, and do not include Cd at a mass ratio of 1/30 or greater in relation to Zn. The particle size of each quantum dot is within a range from 3 nm to 20 nm.Type: ApplicationFiled: February 17, 2020Publication date: March 16, 2023Inventors: Masaki YAMAMOTO, Hirohisa YAMADA, Yoshihiro UETA, Keisuke KITANO, Kazuki GOTO, Yusuke SAKAKIBARA, Tadashi KOBASHI, Masashi KAGO, Soichiro NIKATA, Yuko OGURA, Masanori TANAKA, Yuka TAKAMIZUMA, Tetsuji ITO
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Publication number: 20230055388Abstract: A pixel is divided into a first subpixel and a second subpixel. A first data signal is input to a first drive unit that drives a first light-emitting element constituting the first subpixel, and a second data signal is input to a second drive unit that drives a second light-emitting element constituting the second subpixel. A gray scale value of the first data signal is smaller than a gray scale value of the second data signal.Type: ApplicationFiled: January 24, 2020Publication date: February 23, 2023Inventor: YUSUKE SAKAKIBARA
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Publication number: 20230006162Abstract: A light-emitting device includes: a first light-emitting element including a first light-emitting layer configured to emit light having a light-emitting central wavelength of a first wavelength, and a first electron transport layer layered with the first light-emitting layer; and a second light-emitting element including a second light-emitting layer configured to emit light having a light-emitting central wavelength of a second wavelength shorter than the first wavelength, and the second electron transport layer layered with the second light-emitting layer. Each of the first electron transport layer and the second electron transport layer includes a plurality of nanoparticles, and the second electron transport layer includes the plurality of nanoparticles having a smaller average particle size than the plurality of nanoparticles included in the first electron transport layer, and has a smaller thickness than the first electron transport layer.Type: ApplicationFiled: December 9, 2019Publication date: January 5, 2023Inventors: YUSUKE SAKAKIBARA, Masaki YAMAMOTO
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Publication number: 20220367825Abstract: A light-emitting device includes a first sub-pixel provided with a first light emitter, and a second sub-pixel provided with a second light emitter and constituting, together with the first sub-pixel, one of a plurality of pixels. The first light emitter has a first cathode, a first anode, and a first light-emitting layer containing a first quantum dot and disposed between the first cathode and the first anode. The second light emitter has a second cathode, a second anode, and a second light-emitting layer containing a second quantum dot and disposed between the second cathode and the second anode. The second quantum dot emits light having a longer light-emission wavelength than the first quantum dot. The first light-emitting layer is thicker than the second light-emitting layer.Type: ApplicationFiled: September 27, 2019Publication date: November 17, 2022Inventors: YUSUKE SAKAKIBARA, Masaki YAMAMOTO, YOSHIHIRO UETA
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Publication number: 20220358799Abstract: This inspection assistance program is a program for assisting inspection of a vehicle, and causes an inspection assistance apparatus 2 to function as: a registration information acquisition unit 251 that acquires vehicle registration information corresponding to the vehicle; a determination unit 252 that determines whether wireless identification information for identifying an on-vehicle wireless machine installed in the vehicle is associated with the vehicle registration information; and a display control unit 253 that causes a display unit 23 to display an operation screen that is generated in a mode determined on the basis of the determination result of the determination unit 252 and that is used for inspecting the vehicle through communication with the on-vehicle wireless machine.Type: ApplicationFiled: June 11, 2020Publication date: November 10, 2022Inventors: Akira IMAI, Yusuke SAKAKIBARA, Masakazu ISHIMARU