Patents by Inventor Katsuji Iguchi
Katsuji Iguchi 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: 11908847Abstract: An image display element includes micro light emitting elements disposed in an array on a driving circuit substrate. An excitation light emitting element includes a main body including a compound semiconductor, a metal electrode disposed on a side of the main body located closer to the driving circuit substrate, and a transparent electrode disposed on an opposite side to the driving circuit substrate, and a light emission layer included in the main body is disposed on a side opposite to the driving circuit substrate from a center portion of the main body.Type: GrantFiled: November 13, 2020Date of Patent: February 20, 2024Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Katsuji Iguchi, Hidenori Kawanishi, Koji Takahashi, Hiroaki Onuma
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Patent number: 11726192Abstract: A photodetector measures flight time by an imaging optical element imaging reflected light from an illuminated illumination region of an object illuminated by pulse light, and a light detection portion receiving the imaged light. The light detection portion is formed larger than a projection region reflected at the illumination region of the object and imaged on the light detection portion. In the light detection portion, a portion overlaying the projection region is activated as a light-detection region.Type: GrantFiled: December 3, 2018Date of Patent: August 15, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Hidenori Kawanishi, Koji Takahashi, Noriaki Fujii
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Patent number: 11728370Abstract: An image display device comprises a drive circuit substrate including a drive circuit that supplies currents to micro light-emitting elements to emit light; and the micro light-emitting elements arranged in an array shape on the drive circuit substrate, wherein a light-distribution control unit that increases forward light emission of the micro light-emitting elements is disposed on a light-emitting surface of each of the micro light-emitting elements, and a partition wall that does not transmit the light emitted by the micro light-emitting elements is disposed around the light-distribution control unit.Type: GrantFiled: March 2, 2021Date of Patent: August 15, 2023Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Hidenori Kawanishi, Koji Takahashi, Katsuji Iguchi
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Patent number: 11705536Abstract: In an image display element, a side surface of a nitride semiconductor is covered with a reflection material inclined so as to open in a light emitting direction, wavelength conversion units are surrounded by partition walls, and side surfaces of the partition walls facing the wavelength conversion units are reflection surfaces inclined so as to open in the light emitting direction.Type: GrantFiled: April 21, 2020Date of Patent: July 18, 2023Assignee: SHARP KABUSHIKI KAISHAInventor: Katsuji Iguchi
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Patent number: 11675064Abstract: An SN ratio of light to be received is improved. A polarizing filter (150) that is arranged in a light path extending from an object (11) to a light receiving unit (154) of a ToF sensor (153) and allows transmission of light polarized in a direction vertical to a direction of scanning is provided.Type: GrantFiled: April 18, 2018Date of Patent: June 13, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Hidenori Kawanishi, Katsuji Iguchi, Koji Takahashi
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Publication number: 20230109233Abstract: A micro light-emitting element includes: a micro light-emitting diode (LED) element configured to emit excitation light; and a wavelength conversion portion containing a nano particle configured to absorb the excitation light to emit light having a longer wavelength than the excitation light. The wavelength conversion portion has, on at least a light emitting surface of the wavelength conversion portion, a stack of one or more layers including an oxygen absorption film.Type: ApplicationFiled: August 17, 2022Publication date: April 6, 2023Inventors: Hiroaki ONUMA, Kentaro KUBOTA, Masumi MAEGAWA, Katsuji IGUCHI
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Patent number: 11609311Abstract: A pulsed light emitting element emits pulsed light that is linearly polarized in a first polarization direction, the pulsed light passes through a polarizing beam splitter and a lens in this order and is radiated onto a target object, reflected light passes through the lens and the polarizing beam splitter in this order, is linearly polarized in a second polarization direction that is different from the first polarization direction, and is concentrated on a light receiving element, the pulsed light emitting element and the light receiving element are provided on a focal plane of the lens, and the optical axis of the pulsed light and the optical axis of the reflected light overlap.Type: GrantFiled: October 23, 2018Date of Patent: March 21, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Noriaki Fujii, Hidenori Kawanishi, Koji Takahashi
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Patent number: 11561286Abstract: Provided is a non-mechanical-scanning-type optical radar apparatus that is capable of long distance measurement and its cost is reduced. The optical radar apparatus includes: a light emitting section; and a light receiving system, the light receiving system at least including a focusing optical element and a distance sensor that includes a light receiver, the target field of view being projected on the light receiver through the focusing optical element, the distance sensor being configured to set an activation region in a part of the light receiver depending on the scanning with the light and measure a distance to the object with use of a signal from the activation region.Type: GrantFiled: April 23, 2019Date of Patent: January 24, 2023Assignee: SHARP KABUSHIKI KAISHAInventor: Katsuji Iguchi
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Patent number: 11538796Abstract: In an image display device, a scattering unit has a size that covers a surface of a red conversion unit on a side that emits light having a second wavelength and a surface of a green conversion unit on a side that emits light having a third wavelength, and faces at most a part of a micro LED element.Type: GrantFiled: December 2, 2020Date of Patent: December 27, 2022Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Masumi Maegawa, Katsuji Iguchi, Koji Takahashi
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Patent number: 11520050Abstract: A three-dimensional image element and an optical radar device that have low cost and are capable of detecting a distance to a measurement object at a close distance before a final result of counting the number of pulses is acquired are realized. A pixel storage element has a plurality of binary counters that integrate the number of electrical pulses at mutually different timings and the reading of data by a signal processing circuit and the integration are able to be performed in parallel.Type: GrantFiled: April 18, 2018Date of Patent: December 6, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Koji Takahashi, Hidenori Kawanishi
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Publication number: 20220320374Abstract: A micro light emitting element includes: a nitride semiconductor layer in which an N-type layer, a light emitting layer, and a P-type layer are stacked. Viewing in a direction perpendicular to a surface of the nitride semiconductor layer, multiple V pits are arranged at positions corresponding to vertexes of a polygon in a one-to-one relation in a region of the nitride semiconductor layer.Type: ApplicationFiled: March 25, 2022Publication date: October 6, 2022Inventors: Katsuji IGUCHI, Yuta IKAWA, Hidenori KAWANISHI
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Patent number: 11456288Abstract: An image display element includes micro light emitting elements arranged in an array, a drive circuit substrate that includes a drive circuit for supplying a current to the micro light emitting elements to cause light to be emitted, and an antenna arranged on a light emitting surface of each of the micro light emitting elements, in which the antenna includes isolated convex portions.Type: GrantFiled: August 5, 2020Date of Patent: September 27, 2022Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Hiroaki Onuma, Katsuji Iguchi, Koji Takahashi, Hidenori Kawanishi
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Patent number: 11424225Abstract: An image display device includes: a plurality of micro light emitting elements arranged in an array shape; a driving circuit substrate including a driving circuit that supplies electric current to the plurality of micro light emitting elements and that causes the plurality of micro light emitting elements to emit light; a plurality of micro lenses in contact with light emitting surfaces of the plurality of micro light emitting elements; and a plurality of partition walls disposed around the plurality of micro lenses in a direction parallel to the light emitting surfaces.Type: GrantFiled: July 1, 2020Date of Patent: August 23, 2022Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Katsuji Iguchi, Hidenori Kawanishi, Koji Takahashi, Masumi Maegawa
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Patent number: 11398464Abstract: A micro light emitting element includes: a body including a compound semiconductor layer in which a first conductive layer, a light emission layer, and a second conductive layer with a conductive type opposite to a conductive type of the first conductive layer are stacked in order from a light emitting surface side; a first electrode including a transparent electrode on the light emitting surface side; a second electrode including a metal film on a side opposite to the light emitting surface side; and a first reflective material covering a side surface of the body. The light emission layer is disposed on the light emitting surface side of the body. The side surface of the body is tapered at an inclination angle to open in a light emitting direction.Type: GrantFiled: July 14, 2020Date of Patent: July 26, 2022Assignee: Sharp Fukuyama Laser Co., Ltd.Inventors: Katsuji Iguchi, Hidenori Kawanishi
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Patent number: 11393963Abstract: An N electrode and a P electrode formed on the same surface are respectively bonded to a cathode electrode and an anode electrode of a drive circuit board through a connection step performed once. An LED unit includes a first wiring (21) that is disposed inside a groove formed in a nitride semiconductor (13) to penetrate between an N-type layer (10) and a P-type layer (12) and is electrically connected to the N-type layer (10), and a second wiring that includes a P electrode (30) connected to the P-type layer (12) and an N electrode (31) connected to the first wiring (21), in which the N electrode (31) and the P electrode (30) are formed on the same surface.Type: GrantFiled: March 7, 2018Date of Patent: July 19, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Masumi Maegawa
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Publication number: 20220173287Abstract: An image display element includes pixels, a driving circuit substrate, a microlens, and an inter-pixel partition. The pixels are disposed in an array, each including a micro light emitting element. The driving circuit substrate includes a driving circuit configured to supply a current to the micro light emitting element and cause the micro light emitting element to emit light. The microlens is disposed for each of the pixels. The inter-pixel partition is disposed between the pixels and extends from a light emitting surface of the micro light emitting element to the microlens.Type: ApplicationFiled: December 1, 2021Publication date: June 2, 2022Inventors: KATSUJI IGUCHI, HIROAKI ONUMA, Shin ITOH, Shinsuke ANZAI
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Patent number: 11329033Abstract: A semiconductor module includes a base substrate; a plurality of light emitting elements; a plurality of color conversion layers being in contact with each upper portion of the plurality of light emitting elements adjacent to each other; and a light shielding layer disposed between the plurality of light emitting elements adjacent each other and between the color conversion layers adjacent to each other, and separating the plurality of light emitting elements and a plurality of color conversion layers.Type: GrantFiled: February 21, 2018Date of Patent: May 10, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Hiroaki Onuma, Hiroyoshi Higashisaka, Tsuyoshi Ono, Takashi Ono, Takashi Kurisu, Yuhsuke Fujita, Toshio Hata, Katsuji Iguchi
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Patent number: 11309351Abstract: A micro light-emitting diode includes a first micro light-emitting diode including a first light-emitting layer and emitting light at a first wavelength, and a second micro light-emitting diode including the first light-emitting layer and a second light-emitting layer emitting light at a second wavelength longer than the first wavelength, in which the second light-emitting layer is a nitride semiconductor layer doped with a second rare earth element, and a nitride semiconductor of the first micro light-emitting diode and the nitride semiconductor of the second micro light-emitting diode are separated from each other.Type: GrantFiled: February 17, 2020Date of Patent: April 19, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Hidenori Kawanishi
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Patent number: 11296144Abstract: Provided is a micro light emission element including a compound semiconductor in which an N-side layer, a light emission layer, and a P-side layer are laminated sequentially from a side of a light emitting surface, in which an N-electrode coupled to the N-side layer and a P-electrode coupled to the P-side layer are disposed on another surface opposite to the light emitting surface, the P-electrode is disposed on the light emission layer, the N-electrode is disposed in an isolation region which is a boundary region of the micro light emission element and isolates the light emission layer from a light emission layer of another micro light emission element, a surface of the N-electrode on a side of the other surface and a surface of the P-electrode on the side of the other surface are flush with each other, and the N-electrode and the P-electrode are both formed of a single interconnection layer.Type: GrantFiled: July 15, 2020Date of Patent: April 5, 2022Assignee: SHARP KABUSHIKI KAISHAInventor: Katsuji Iguchi
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Patent number: 11289634Abstract: In a micro light emitting element, a first metal film electrically connected to a second conductive layer is disposed on a surface on an opposite side of a light emitting surface side. The first metal film covers the second conductive layer. A first inclined angle of a first conductive layer side surface from a slope formed around a light emission layer to the light emitting surface is larger than a second inclined angle of the slope. The slope and the first conductive layer side surface are covered together by a second metal film. A first transparent insulating film is disposed between the slope and the second metal film.Type: GrantFiled: November 27, 2019Date of Patent: March 29, 2022Assignee: SHARP KABUSHIKI KAISHAInventors: Katsuji Iguchi, Takashi Kurisu, Masumi Maegawa