Patents by Inventor Tenfu NAKAMURA
Tenfu NAKAMURA 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: 11934062Abstract: A display device is providing and includes first substrate including first transparent substrate, and pixel electrode disposed in each of pixels on first transparent substrate; second substrate including second transparent substrate having first and second side surfaces, and common electrode disposed over pixels; and liquid crystal layer disposed between first and second substrates and including stripe-shaped polymer and liquid crystal molecules.Type: GrantFiled: December 9, 2022Date of Patent: March 19, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Tenfu Nakamura, Kentaro Okuyama
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Patent number: 11934074Abstract: A display device includes a liquid crystal layer between a first substrate and a second substrate. The first substrate includes a wiring line and a pixel electrode. The liquid crystal layer includes a stripe-shaped polymer extending in a first direction and a liquid crystal molecule. The liquid crystal layer includes a first polymer in an area overlapping the wiring line and a second polymer in an area overlapping the pixel electrode. The first polymer includes a first portion extending in a direction different from the first direction. The second polymer includes a second portion extending in a direction different from the first direction. A density of the first portion is higher than a density of the second portion.Type: GrantFiled: June 8, 2023Date of Patent: March 19, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Kentaro Okuyama, Tenfu Nakamura
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Patent number: 11906863Abstract: A display device includes a liquid crystal layer between a first substrate and a second substrate. The first substrate includes a wiring line and a pixel electrode. The liquid crystal layer includes a stripe-shaped polymer extending in a first direction and a liquid crystal molecule. The liquid crystal layer includes a first polymer in an area overlapping the wiring line and a second polymer in an area overlapping the pixel electrode. The first polymer includes a first portion extending in a direction different from the first direction. The second polymer includes a second portion extending in a direction different from the first direction. A density of the first portion is higher than a density of the second portion.Type: GrantFiled: October 26, 2022Date of Patent: February 20, 2024Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Kentaro Okuyama, Tenfu Nakamura
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Publication number: 20240045274Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate, a sealing member bonding the first substrate with the second substrate, and a liquid crystal layer between the first substrate and the second substrate. From an aspect, the sealing member includes a first sealing member surrounding a display area including a plurality of pixels, and a second sealing member formed of a same material as the first sealing member and arranged in the display area.Type: ApplicationFiled: August 7, 2023Publication date: February 8, 2024Applicant: Japan Display Inc.Inventors: Koichi IGETA, Tenfu NAKAMURA, Kentaro OKUYAMA
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Publication number: 20230400733Abstract: According to one embodiment, a display device includes a display panel where an image is displayed, a transparent substrate having a main surface opposed to the display panel, and a first side surface connected to the main surface, a light source emitting light toward the first side surface, a low-refractive layer formed on the main surface and having a refractive index smaller than a refractive index of the transparent substrate, a protective layer covering the low-refractive layer and an adhesive layer bonding the display panel to the protective layer.Type: ApplicationFiled: June 7, 2023Publication date: December 14, 2023Inventor: Tenfu NAKAMURA
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Publication number: 20230367056Abstract: According to one embodiment, a display device includes a first transparent substrate, a second transparent substrate, a liquid crystal layer, a third transparent substrate having a first side surface, a second side surface, and an inner surface, a transparent layer arranged on the inner surface, and light emitting elements. The transparent layer includes a band-shaped portion extending from the first side surface toward the second side surface and a frame-shaped portion formed in a frame shape surrounding the band-shaped portion. The band-shaped portion is separated from the frame-shaped portion. A width of the band-shaped portion on a first side surface side is larger than a width of the band-shaped portion on a second side surface side.Type: ApplicationFiled: July 19, 2023Publication date: November 16, 2023Inventors: Tenfu NAKAMURA, Kentaro OKUYAMA, Kojiro IKEDA
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Publication number: 20230359087Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer, a first light guide element and a light-emitting element. The liquid crystal layer contains stringy polymers and liquid crystal molecules. The first light guide element includes a third transparent substrate including a side surface and a main surface, and a transparent layer disposed on the main surface and having a refractive index lower than that of the third transparent substrate. The light-emitting element opposes the side surface, and the third transparent substrate is adhered to the second transparent substrate while interposing the transparent layer therebetween. The light-emitting element is disposed on the second transparent substrate.Type: ApplicationFiled: July 13, 2023Publication date: November 9, 2023Applicant: Japan Display Inc.Inventors: Kojiro IKEDA, Tenfu NAKAMURA, Kentaro OKUYAMA, Zhengyi GOU, Hisanori KAWAKAMI
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Publication number: 20230359096Abstract: According to one embodiment, a display device including a liquid crystal layer containing strip-like polymers and liquid crystal molecules, a third transparent substrate, and a transparent layer disposed on the third transparent substrate and having a refractive index lower than that of the third transparent substrate, wherein the transparent layer includes strip portions which include first and second end portions, and a middle portion, the first end portion has a first width greater than a width of the middle portion, the second end portion has a second width greater than the width of the middle portion, and first wiring lines overlap the strip portions, respectively and extend in a same direction.Type: ApplicationFiled: July 20, 2023Publication date: November 9, 2023Inventors: Tenfu NAKAMURA, Kentaro OKUYAMA, Kojiro IKEDA
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Patent number: 11809049Abstract: According to one embodiment, a display device includes a first substrate including a pixel electrode, a second substrate including a common electrode, a liquid crystal layer located between the first substrate and the second substrate and containing polymer and liquid crystal molecules, and a light emitting element opposed to an end surface of the second substrate, the common electrode being separated from the pixel electrode by a first distance, at a first position, the common electrode being separated from the pixel electrode by a second distance, at a second position more separated from the light emitting element than the first position, the second distance being smaller than the first distance.Type: GrantFiled: February 7, 2023Date of Patent: November 7, 2023Assignee: Japan Display Inc.Inventors: Tenfu Nakamura, Kojiro Ikeda, Kentaro Okuyama
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Publication number: 20230350243Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a sealant formed bonding the first substrate with the second substrate, a liquid crystal layer surrounded by the sealant, and a light emitting module. The sealant includes a first portion, a second portion opposed to the first portion with the liquid crystal layer sandwiched therebetween, an inlet formed in the second portion, and a filling material filled in the inlet. The liquid crystal layer is arranged over a display area where an image is displayed, a first area between the display area and the first portion, and a second area between the display area and the second portion, in plan view. A first width of the first area is larger than a width of the second area.Type: ApplicationFiled: July 12, 2023Publication date: November 2, 2023Inventors: Tatsunori MURAMOTO, Kentaro KAWAI, Yoshihide OHUE, Kentaro OKUYAMA, Tenfu NAKAMURA, Koji KITAMURA
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Publication number: 20230314887Abstract: A display device includes a liquid crystal layer between a first substrate and a second substrate. The first substrate includes a wiring line and a pixel electrode. The liquid crystal layer includes a stripe-shaped polymer extending in a first direction and a liquid crystal molecule. The liquid crystal layer includes a first polymer in an area overlapping the wiring line and a second polymer in an area overlapping the pixel electrode. The first polymer includes a first portion extending in a direction different from the first direction. The second polymer includes a second portion extending in a direction different from the first direction. A density of the first portion is higher than a density of the second portion.Type: ApplicationFiled: June 8, 2023Publication date: October 5, 2023Applicant: Japan Display Inc.Inventors: Kojiro IKEDA, Kentaro OKUYAMA, Tenfu NAKAMURA
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Publication number: 20230280518Abstract: According to one embodiment, a display device includes a first substrate, a second substrate opposed to the first substrate, a polymer dispersed liquid crystal layer arranged between the first substrate and the second substrate, a first transparent substrate having a first side surface and opposed to the second substrate, and a first light source emitting light toward the first side surface. The second substrate has a second side surface on the first side surface side, the polymer dispersed liquid crystal layer is capable of switching a state in which light incident on the polymer dispersed liquid crystal layer is transmitted and a state in which the light is scattered, by applying a voltage.Type: ApplicationFiled: March 7, 2023Publication date: September 7, 2023Applicant: Japan Display Inc.Inventor: Tenfu NAKAMURA
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Patent number: 11740510Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer, a first light guide element and a light-emitting element. The liquid crystal layer contains stringy polymers and liquid crystal molecules. The first light guide element includes a third transparent substrate including a side surface and a main surface, and a transparent layer disposed on the main surface and having a refractive index lower than that of the third transparent substrate. The light-emitting element opposes the side surface, and the third transparent substrate is adhered to the second transparent substrate while interposing the transparent layer therebetween. The light-emitting element is disposed on the second transparent substrate.Type: GrantFiled: February 21, 2022Date of Patent: August 29, 2023Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Tenfu Nakamura, Kentaro Okuyama, Zhengyi Gou, Hisanori Kawakami
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Publication number: 20230213828Abstract: According to one embodiment, a display device including a first transparent substrate, a second transparent substrate, a liquid crystal layer, a third transparent substrate, and a transparent layer having a refractive index lower than a refractive index of the third transparent substrate, wherein the transparent layer includes a plurality of band portions including first to third band portions, a second end portion has a smaller width than a first end portion in band portions, the second end portion of the second band portion has a smaller width than the second end portion of the first band portion, and the second end portion of the third band portion has a smaller width than the second end portion of the first band portion.Type: ApplicationFiled: February 24, 2023Publication date: July 6, 2023Inventor: Tenfu NAKAMURA
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Publication number: 20230185137Abstract: According to one embodiment, a display device includes a first substrate including a pixel electrode, a second substrate including a common electrode, a liquid crystal layer located between the first substrate and the second substrate and containing polymer and liquid crystal molecules, and a light emitting element opposed to an end surface of the second substrate, the common electrode being separated from the pixel electrode by a first distance, at a first position, the common electrode being separated from the pixel electrode by a second distance, at a second position more separated from the light emitting element than the first position, the second distance being smaller than the first distance.Type: ApplicationFiled: February 7, 2023Publication date: June 15, 2023Inventors: Tenfu NAKAMURA, Kojiro IKEDA, Kentaro OKUYAMA
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Publication number: 20230133222Abstract: According to one embodiment, a display device includes a first substrate having a first transparent substrate and a pixel electrode, a second substrate having a second transparent substrate, a first common electrode, a second common electrode, and an insulating film disposed between the first common electrode and the second common electrode, and a liquid crystal layer. The first common electrode is disposed between the liquid crystal layer and the insulating film, and includes a first opening and a first electrode portion. The second common electrode is disposed between the insulating film and the second transparent substrate, and includes a second electrode portion overlapping the first opening.Type: ApplicationFiled: December 29, 2022Publication date: May 4, 2023Applicant: Japan Display Inc.Inventors: Kojiro IKEDA, Tenfu NAKAMURA, Kentaro OKUYAMA
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Patent number: 11640091Abstract: According to one embodiment, a display device includes a first substrate, a second substrate, a liquid crystal layer which includes a stripe-like polymer and first liquid crystal molecules having responsiveness to an electric field, a light source and a transparent film which includes second liquid crystal molecules which are not responsive to an electric field. The second liquid crystal molecules have a large inclination angle with respect to the horizontal plane of the transparent film in a first region that is separate from the light source, and have, in a second region positioned between the light source and the first region, a smaller inclination angle than the inclination angle in the first region with respect to the horizontal plane of the transparent film.Type: GrantFiled: March 24, 2022Date of Patent: May 2, 2023Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Tenfu Nakamura, Kentaro Okuyama
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Publication number: 20230103482Abstract: A display device is providing and includes first substrate including first transparent substrate, and pixel electrode disposed in each of pixels on first transparent substrate; second substrate including second transparent substrate having first and second side surfaces, and common electrode disposed over pixels; and liquid crystal layer disposed between first and second substrates and including stripe-shaped polymer and liquid crystal molecules.Type: ApplicationFiled: December 9, 2022Publication date: April 6, 2023Inventors: Kojiro IKEDA, Tenfu NAKAMURA, Kentaro OKUYAMA
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Patent number: 11614650Abstract: According to one embodiment, a display device includes a first display panel including a first and second transparent substrate, a first liquid crystal layer, and a first light-emitting element, a second display panel including a third and fourth transparent substrate, a second liquid crystal layer and a second light emitting element, a filling member provided between the first and second display panel and having a refractive index equal to that of the first to fourth transparent substrates, a first light guide bonded to the first and second display panel, and a first adhesive member provided between the first display panel and the first light guide and between the second display panel and the first light guide.Type: GrantFiled: February 14, 2022Date of Patent: March 28, 2023Assignee: Japan Display Inc.Inventors: Tenfu Nakamura, Kentaro Okuyama, Kojiro Ikeda
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Patent number: 11614652Abstract: According to one embodiment, a display device comprises substrates, a liquid crystal layer containing stringy polymers, a display area with first and second pixels and a light source. In a spatial frequency spectrum obtained by performing FT on a pattern of the polymers which overlap the pixels with respect to first and second frequency components, when an outline in a plane defined by the components in an area having a value of 75% or more of the maximum value is defined as an evaluation circle, and a value obtained by dividing a length of a major axis of the circle by that of a minor axis is defined as an evaluation value, the evaluation value of the first pixel is greater than that of the second pixel.Type: GrantFiled: October 19, 2021Date of Patent: March 28, 2023Assignee: Japan Display Inc.Inventors: Tenfu Nakamura, Kojiro Ikeda, Kentaro Okuyama