Patents by Inventor Hirohisa Miki
Hirohisa Miki 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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Publication number: 20220035189Abstract: According to one embodiment, a display device includes a plurality of first prisms, a plurality of second prisms and a display panel provided between the first prisms and the second prisms, and the display panel includes a first substrate including a first transparent substrate and a pixel electrode, a second substrate including a second transparent substrate and a common electrode opposing the pixel electrode, and a liquid crystal layer provided between the first substrate and the second substrate and containing a polymer and liquid crystal molecules.Type: ApplicationFiled: October 14, 2021Publication date: February 3, 2022Inventors: Genki ASOZU, Toshiyuki HIGANO, Hirohisa MIKI
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Patent number: 10644094Abstract: A display device includes a display region, a peripheral region around the display region, a substrate having flexibility, a terminal group in the peripheral region, a plurality of connection wirings connected to the terminal group, extending from the terminal group in a first direction and arranged in a second direction intersecting the first direction, an inorganic insulating film in the peripheral region, and an organic insulating film in the peripheral region. The peripheral region has a peripheral region (first peripheral region) curved in a thickness direction of the substrate. The first peripheral region includes a region (first region) that overlaps each of the plurality of connection wirings and a region (second region) that does not overlap the plurality of connection wirings. The first region and the second region are arranged in the second direction.Type: GrantFiled: September 17, 2018Date of Patent: May 5, 2020Assignee: Japan Display Inc.Inventor: Hirohisa Miki
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Publication number: 20190096980Abstract: A display device includes a display region, a peripheral region around the display region, a substrate having flexibility, a terminal group in the peripheral region, a plurality of connection wirings connected to the terminal group, extending from the terminal group in a first direction and arranged in a second direction intersecting the first direction, an inorganic insulating film in the peripheral region, and an organic insulating film in the peripheral region. The peripheral region has a peripheral region (first peripheral region) curved in a thickness direction of the substrate. The first peripheral region includes a region (first region) that overlaps each of the plurality of connection wirings and a region (second region) that does not overlap the plurality of connection wirings. The first region and the second region are arranged in the second direction.Type: ApplicationFiled: September 17, 2018Publication date: March 28, 2019Applicant: Japan Display Inc.Inventor: Hirohisa MIKI
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Patent number: 10054819Abstract: According to one embodiment, a display device includes an insulating substrate, a wavelength conversion element, a light propagation layer including a light-path portion formed between the insulating substrate and the wavelength conversion element, wherein an area of a surface on the insulating substrate side is greater than an area of a surface on the wavelength conversion element side, and a non-light-path portion formed of a material having a refractive index less than the light-path portion, the light-path portion being sandwiched between the non-light-path portions, and a reflective film formed between the non-light-path portion and the wavelength conversion element.Type: GrantFiled: February 1, 2016Date of Patent: August 21, 2018Assignee: Japan Display Inc.Inventors: Hirohisa Miki, Shigesumi Araki
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Publication number: 20180156961Abstract: According to one embodiment, an illumination device includes a light emitting chip including a main surface and a side surface and emitting light, a sealing member including a scattering member and sealing the main surface and the side surface, and a wavelength converting member converting a wavelength of the light emitted from the light emitting chip.Type: ApplicationFiled: November 15, 2017Publication date: June 7, 2018Applicant: Japan Display Inc.Inventor: Hirohisa MIKI
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Patent number: 9983439Abstract: According to one embodiment, a wavelength converter includes a microlens which condenses excitation light, a reflective layer which is opposed to the microlens and includes an aperture, and a wavelength conversion element which is opposed to the microlens via the reflective layer, absorbs the excitation light, and emits emission light whose wavelength is different from that of the excitation light.Type: GrantFiled: June 17, 2016Date of Patent: May 29, 2018Assignee: Japan Display Inc.Inventors: Tatsuro Mizunuma, Shigesumi Araki, Hirohisa Miki
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Patent number: 9810946Abstract: According to one embodiment, a display device includes a first insulating substrate, a second insulating substrate, a first pixel electrode and a second pixel electrode, a wavelength conversion element to convert light of a first wavelength polarized in a first polarization direction into light of a second wavelength polarized in a second polarization direction, and a liquid crystal layer having a first thickness in an area opposed to the first pixel electrode, and having a second thickness greater than the first thickness in an area opposed to the second pixel electrode.Type: GrantFiled: January 11, 2016Date of Patent: November 7, 2017Assignee: Japan Display Inc.Inventors: Tatsuro Mizunuma, Shigesumi Araki, Hirohisa Miki
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Patent number: 9810828Abstract: A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate, an LED, and a wavelength converter between the light guide plate and the LED. The wavelength converter includes semiconductor quantum dots in a supporter, to which a reflection film is applied except surfaces that face the LED and the light guide plate.Type: GrantFiled: September 27, 2016Date of Patent: November 7, 2017Assignee: Japan Display Inc.Inventors: Hirohisa Miki, Shigesumi Araki
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Patent number: 9784900Abstract: According to one embodiment, an illumination device including a light source unit including a light-emitting element having a light-emitting surface, a reflective surface formed around the light-emitting surface and having higher optical reflectivity than the light-emitting surface, a wavelength conversion member which converts a wavelength of emitted light from the light-emitting surface, an optical member located between the light source unit and the wavelength conversion member and including a light path adjustment mechanism which guides, to the reflective surface, light returned from the wavelength conversion member to the light-emitting surface, and a lightguide opposed to the wavelength conversion member.Type: GrantFiled: July 22, 2016Date of Patent: October 10, 2017Assignee: Japan Display Inc.Inventors: Hirohisa Miki, Shigesumi Araki
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Patent number: 9726937Abstract: Recently, with an increasing demand for narrowing a frame, the seal line width is inclined to get finer, which deteriorates the seal adhesive strength. One or a plurality of grooves are formed in a resin layer that is a foundation of a seal area. A direction of forming a groove (lateral surface) is preferably in a vertical direction to the external stress. In a seal straight portion, a groove is preferably formed not only in a parallel direction to the seal but also in the vertical direction. In a seal corner portion, a groove is preferably formed in a shape curved convexly toward a direction of a display area (active area).Type: GrantFiled: April 7, 2015Date of Patent: August 8, 2017Assignee: Japan Display Inc.Inventors: Shiro Sumita, Hirohisa Miki
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Patent number: 9664959Abstract: In the case of a pixel including four and more sub pixels, the area of one pixel is larger than that in the case of a pixel including three sub pixels; therefore, high definition becomes difficult. When a central display area has a structure of four and more sub pixels, in a display device, the pixel structure in a peripheral display area for use in creating a virtual image is reduced to three sub pixels, to allocate the vacant space for high density assignment. Only the pixel density in the vicinity of a frame of a lens portion is compressed, in order to apparently resolve the discord with the image of a non-lens portion. The pixel side in the peripheral display area may be even or gradually narrowed.Type: GrantFiled: March 11, 2015Date of Patent: May 30, 2017Assignee: Japan Display Inc.Inventors: Hirohisa Miki, Shigesumi Araki
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Publication number: 20170146719Abstract: A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes a light guide plate, an LED, and a wavelength converter between the light guide plate and the LED. The wavelength converter includes semiconductor quantum dots in a supporter, to which a reflection film is applied except surfaces that face the LED and the light guide plate.Type: ApplicationFiled: September 27, 2016Publication date: May 25, 2017Inventors: Hirohisa MIKI, Shigesumi ARAKI
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Publication number: 20170023721Abstract: According to one embodiment, an illumination device including a light source unit including a light-emitting element having a light-emitting surface, a reflective surface formed around the light-emitting surface and having higher optical reflectivity than the light-emitting surface, a wavelength conversion member which converts a wavelength of emitted light from the light-emitting surface, an optical member located between the light source unit and the wavelength conversion member and including a light path adjustment mechanism which guides, to the reflective surface, light returned from the wavelength conversion member to the light-emitting surface, and a lightguide opposed to the wavelength conversion member.Type: ApplicationFiled: July 22, 2016Publication date: January 26, 2017Applicant: Japan Display Inc.Inventors: Hirohisa MIKI, Shigesumi ARAKI
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Publication number: 20170003548Abstract: According to one embodiment, a wavelength converter includes a microlens which condenses excitation light, a reflective layer which is opposed to the microlens and includes an aperture, and a wavelength conversion element which is opposed to the microlens via the reflective layer, absorbs the excitation light, and emits emission light whose wavelength is different from that of the excitation light.Type: ApplicationFiled: June 17, 2016Publication date: January 5, 2017Applicant: Japan Display Inc.Inventors: Tatsuro MIZUNUMA, Shigesumi ARAKI, Hirohisa MIKI
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Publication number: 20160231616Abstract: A display device is provided that inhibits color mixture between adjacent subpixels and allows for obtaining a high-quality image. The display device includes a display area on which a light-blocking metal layer, a black matrix, and a plurality of subpixels are arranged, wherein the plurality of subpixels are arranged adjacent to one another via a black matrix as seen vertically from above, the black matrix and the light-blocking metal layer are arranged to overlap each other as seen vertically from above, and the light-blocking metal layer 130 is arranged on the bank of an organic flattened film.Type: ApplicationFiled: April 14, 2016Publication date: August 11, 2016Inventors: Noriyoshi KANDA, Shigesumi ARAKI, Mitsutaka OKITA, Hirohisa MIKI
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Publication number: 20160223863Abstract: According to one embodiment, a display device includes a first insulating substrate, a second insulating substrate, a first pixel electrode and a second pixel electrode, a wavelength conversion element to convert light of a first wavelength polarized in a first polarization direction into light of a second wavelength polarized in a second polarization direction, and a liquid crystal layer having a first thickness in an area opposed to the first pixel electrode, and having a second thickness greater than the first thickness in an area opposed to the second pixel electrode.Type: ApplicationFiled: January 11, 2016Publication date: August 4, 2016Applicant: Japan Display Inc.Inventors: Tatsuro MIZUNUMA, Shigesumi ARAKI, Hirohisa MIKI
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Publication number: 20160223870Abstract: According to one embodiment, a display device includes an insulating substrate, a wavelength conversion element, a light propagation layer including a light-path portion formed between the insulating substrate and the wavelength conversion element, wherein an area of a surface on the insulating substrate side is greater than an area of a surface on the wavelength conversion element side, and a non-light-path portion formed of a material having a refractive index less than the light-path portion, the light-path portion being sandwiched between the non-light-path portions, and a reflective film formed between the non-light-path portion and the wavelength conversion element.Type: ApplicationFiled: February 1, 2016Publication date: August 4, 2016Applicant: Japan Display Inc.Inventors: Hirohisa MIKI, Shigesumi ARAKI
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Publication number: 20160209706Abstract: There is provided a display device that can improve the use efficiency of light from a light source and achieve low power consumption with a simple configuration even in the case in which no color filter is used. A display device includes a substrate having a display region and a TFT disposed on the display region, wavelength conversion layers each including a columnar quantum rod and disposed on a region corresponding to the display region, and a light source that excites the quantum rods.Type: ApplicationFiled: December 31, 2015Publication date: July 21, 2016Inventors: Hirohisa Miki, Shigesumi Araki, Kazuhiro Nishiyama
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Patent number: 9341901Abstract: A display device is provided that inhibits color mixture between adjacent subpixels and allows for obtaining a high-quality image. The display device includes a display area on which a light-blocking metal layer, a black matrix, and a plurality of subpixels are arranged, wherein the plurality of subpixels are arranged adjacent to one another via a black matrix as seen vertically from above, the black matrix and the light-blocking metal layer are arranged to overlap each other as seen vertically from above, and the light-blocking metal layer 130 is arranged on the bank of an organic flattened film.Type: GrantFiled: July 16, 2015Date of Patent: May 17, 2016Assignee: Japan Display Inc.Inventors: Noriyoshi Kanda, Shigesumi Araki, Mitsutaka Okita, Hirohisa Miki
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Publication number: 20160091757Abstract: The display device includes: an array substrate having an in-cell polarizing layer and a color layer; a counter substrate; a liquid crystal layer; a white light source; and a polarizing plate placed on the counter substrate on its one side opposite to a side on which the liquid crystal layer is provided. The color layer includes a red color layer, a green color layer and a blue color layer. The red color layer includes a red color filter and a red wavelength conversion layer which is located on its one side closer to the white light source than the red color filter. The green color layer includes a green color filter and a green wavelength conversion layer which is located on its one side closer to the white light source than the green color filter. The blue color layer includes a blue color filter.Type: ApplicationFiled: September 25, 2015Publication date: March 31, 2016Inventors: Hirohisa MIKI, Shigesumi ARAKI