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公开(公告)号：US11131800B2
公开(公告)日：2021-09-28
申请号：US16925305
申请日：2020-07-09
Applicant: FUJIFILM CORPORATION
Inventor： Takashi Yonemoto , Hirofumi Toyama , Naoyoshi Yamada
IPC: F21V8/00 , G02F1/13357 , G02F1/1335
Abstract: The backlight unit includes: a light guide that includes an incidence surface and an emission surface facing each other; and a light source portion including a plurality of point light sources that are two-dimensionally arranged to face the incidence surface of the light guide, in which light emitted from the light source portion is incident into the incidence surface of the light guide and emitted from the emission surface, the backlight unit is driven by local dimming in which at least two point light sources among the plurality of point light sources are used as a minimum point lighting unit, the light guide includes a plurality of light advancing direction conversion portions and a plurality of light extraction portions, each of the light advancing direction conversion portions is provided at each of positions on the incidence surface facing the plurality of point light sources and changes an advancing direction of each of light components to a direction in which the light component is guided in the light guide, and each of the light extraction portions is provided per unit region corresponding to the minimum point lighting unit in a state where a density in a peripheral portion of the unit region is set to be higher than a density in a center portion of the unit region and emits the light guided in the light guide.
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公开(公告)号：US10132974B2
公开(公告)日：2018-11-20
申请号：US15465914
申请日：2017-03-22
Applicant: FUJIFILM Corporation
Inventor： Yusuke Furuki , Naoyoshi Yamada , Masakane Muto
Abstract: The present invention provides a circularly polarizing plate that improves the visibility of black color in an oblique direction when being applied to a display device and having a small thickness, the display device including a circularly polarizing plate. The circularly polarizing plate is a circularly polarizing plate including, in this order, a polarizer, a λ/2 plate, and a λ/4 plate, in which the λ/2 plate is a laminate of a first A-plate and a first C-plate, the λ/4 plate is a laminate of a second A-plate and a second C-plate, one of the first C-plate and the second C-plate is a cellulose acylate film having a predetermined Rth, and the other of the first C-plate and the second C-plate is an optically anisotropic layer including a liquid crystal compound having a predetermined Rth or a cellulose acylate film having a predetermined Rth.
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13.发明授权公开(公告)号：US09632229B2
公开(公告)日：2017-04-25
申请号：US15041673
申请日：2016-02-11
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada , Tatsuya Oba , Yukito Saitoh , Katsufumi Ohmuro , Akiko Watano
IPC: G02F1/1335 , F21V8/00
CPC classification number: G02B6/005 , G02B6/0023 , G02F1/1336 , G02F1/133615 , G02F1/133617 , G02F2001/133614
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)
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公开(公告)号：US12130457B2
公开(公告)日：2024-10-29
申请号：US17846897
申请日：2022-06-22
Applicant: FUJIFILM Corporation
Inventor： Wataru Hoshino , Naoyoshi Yamada , Shinichi Yoshinari
CPC classification number: G02B5/3016 , C09K19/3852 , C09K19/56 , C09K19/601 , G02F1/1323 , G02F2202/043
Abstract: Provided is an optical laminate used for a viewing angle control system, and an image display device, including a light absorption anisotropic layer formed of a liquid crystal composition containing a liquid crystal compound and a dichroic substance, a first adjacent layer in contact with one surface of the light absorption anisotropic layer, and a second adjacent layer in contact with a surface of the light absorption anisotropic layer opposite to the one surface, in which a content of the dichroic substance is 7.0% by mass or greater, an angle θs between a transmittance central axis of the light absorption anisotropic layer and a surface of the light absorption anisotropic layer in a normal direction is in a range of 5° to 60°, and both refractive indices n1 and n2 of the first and second adjacent layers, respectively, are in a range of 1.46 to 1.72.
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公开(公告)号：US11914140B2
公开(公告)日：2024-02-27
申请号：US18060320
申请日：2022-11-30
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada
CPC classification number: G02B27/0018 , B29D11/00644 , G02B5/3016 , G02B23/14 , G06F1/163
Abstract: Provided is an optical element that suppresses ghosts where an absorbing polarizer having a curved surface portion is applied to an image display device formed of a reciprocation optical system. Further provided are a virtual reality display device, an electronic viewfinder, and a method of producing a polarizer. The optical element includes absorbing polarizers A and B, polarizer A having a curved surface portion, where a position X being of a surface of the polarizer A on a side of and closest to the side of polarizer B, a position Y being of a surface of the polarizer B on a side of polarizer A, closest to the position X, and a straight line L passing through the positions X and Y is drawn, a position Z is on the straight line L and beyond the position X when it the position X is observed from position Y.
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Patent Agency Ranking
公开(公告)号：US11163170B2
公开(公告)日：2021-11-02
申请号：US16571783
申请日：2019-09-16
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada
Abstract: An image display system includes a first image display unit that has a first image display surface for displaying a first image and emits first emission light as first polarized light, a beam splitter that has a transflective surface for transmitting a part of incident light and reflecting another part of the incident light, the transflective surface being arranged at a position where the first emission light emitted from the first image display unit is incident, and the beam splitter changing the polarized light of the first emission light and reflecting the first emission light, and an absorption polarizer that is arranged at a position where reflected light reflected from the transflective surface of the beam splitter out of the first emission light is incident, to absorb the first polarized light and transmit second polarized light different from the first polarized light.
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公开(公告)号：US11137638B2
公开(公告)日：2021-10-05
申请号：US17190112
申请日：2021-03-02
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada , Tatsuya Iwasaki , Katsufumi Ohmuro
IPC: G02F1/1335
Abstract: The present invention provides a liquid crystal display device which suppresses a color change of light leak depending on a direction in the visual recognition from an oblique direction during black display, and has high display quality. The liquid crystal display device includes, in order, at least: a first polarizer; an optically anisotropic layer a liquid crystal cell; and a second polarizer, the liquid crystal cell has pixels with a screen resolution of 250 ppi or more, the pixels each have at least blue, green, and red subpixels, the subpixel has a chevron structure in which an angle formed between at least one side and an absorption axis of the first polarizer or an absorption axis of the second polarizer is larger than 0° and not larger than 5°, and a depolarization degree of the liquid crystal cell in a visible light region satisfies a predetermined requirement.
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公开(公告)号：US10996510B2
公开(公告)日：2021-05-04
申请号：US16856618
申请日：2020-04-23
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada , Yukito Saitoh
IPC: G02F1/1335 , G02F1/13357
Abstract: The planar lighting device includes: a light source; and a brightness homogenizing member that has a laminate structure including high refractive index layers and low refractive index layers, and a light incidence portion that allows light emitted from each of the plurality of point light sources to be incident into the high refractive index layers is provided at a position of the laminate structure facing the point light source. The light incidence portion is formed of a hollow portion that is provided across the two or more high refractive index layers included in the laminate structure to penetrate at least one high refractive index layer and has a function of allowing the light to be incident into the high refractive index layers, and each of the high refractive index layers includes a light extraction mechanism that is provided at a position spaced apart from the light incidence portion.
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19.发明授权公开(公告)号：US10479931B2
公开(公告)日：2019-11-19
申请号：US15817875
申请日：2017-11-20
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada
IPC: C09K11/02 , C09D5/22 , C09D5/24 , C09D133/10 , C09D163/00 , C09K11/88 , F21V8/00 , G02F1/1335 , C08K3/30 , C08K9/04
Abstract: A composition and a wavelength converter are provided. The composition includes at least: quantum dots having an emission peak wavelength in a visible light region; and quantum dots having an emission peak wavelength in an ultraviolet region or in a near-ultraviolet region. The wavelength converter includes, in a polymer: quantum dots having an emission peak wavelength in a visible light region; quantum dots having an emission peak wavelength in an ultraviolet region or in a near-ultraviolet region; and an oxide formed by oxidizing at least a part of the quantum dots having an emission peak wavelength in an ultraviolet region or in a near-ultraviolet region.
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公开(公告)号：US11789190B2
公开(公告)日：2023-10-17
申请号：US17901476
申请日：2022-09-01
Applicant: FUJIFILM Corporation
Inventor： Naoyoshi Yamada , Shinichi Yoshinari , Fumitake Mitobe
IPC: G02F1/1335 , G02B5/30 , C09K19/38 , C09K19/56 , G02F1/13
CPC classification number: G02B5/3016 , C09K19/3861 , C09K19/56 , G02F1/1323 , G02F1/133531
Abstract: Provided is a viewing angle control polarizing plate that has asymmetric transmission characteristics, does not cause moire even in a case of being used in combination with a high-definition image display device, and is capable of easily following a curved surface and a viewing angle control system with high productivity. The viewing angle control system includes at least a first polarizer and an optically anisotropic layer, in which an absorption axis of the first polarizer forms an angle of 45° or greater with respect to an in-plane direction, and a main axis of a refractive index of the optically anisotropic layer is tilted in the in-plane direction.
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