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公开(公告)号：US20170227693A1
公开(公告)日：2017-08-10
申请号：US15496646
申请日：2017-04-25
Applicant: FUJIFILM Corporation
Inventor： Yoji ITO , Daisuke KASHIWAGI , Michio NAGAI , Akira YAMAMOTO , Nobuhiko ICHIHARA , Hideyuki NAKAMURA
CPC classification number: G02B5/26 , G06F3/0321 , G06F3/03545 , G06F3/0421
Abstract: An optical member and an image display device including an optical member having a support, an underlayer, and a wavelength selective reflection portion in this order, in which the wavelength selective reflection portion has wavelength selective reflecting properties, the wavelength selective reflection portion has a cholesteric structure which has a stripe pattern including bright portions and dark portions in a cross-sectional view of the wavelength selective reflection portion when observed with a scanning electron microscope, the underlayer absorbs invisible light, and a wavelength range where the wavelength selective reflection portion has wavelength selective reflecting properties overlaps a wavelength range of invisible light absorbed by the underlayer. In the optical member, a Signal/Noise ratio is high which is a ratio of a reflectance of the wavelength selective reflection portion to a reflectance of the underlayer in a wavelength range where the wavelength selective reflection portion has wavelength selective reflecting properties.
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公开(公告)号：US20200225387A1
公开(公告)日：2020-07-16
申请号：US16836364
申请日：2020-03-31
Applicant: FUJIFILM Corporation
Inventor： Makoto ISHIGURO , Nobuhiko ICHIHARA , Michio NAGAI
Abstract: Provided are a reflective sheet having selective reflection in a wide wavelength range and a small change in tint depending on angles at which light is visually recognized, a decorative sheet, and a method of manufacturing a reflective sheet, the reflective sheet including a pitch gradient layer in which a helical pitch changes in a thickness direction of the layer. The reflective sheet includes at least one cholesteric liquid crystal layer having wavelength selective reflection properties, in which at least one of the cholesteric liquid crystal layers is a pitch gradient layer in which a helical pitch changes in a thickness direction, a half-width of an integral reflection spectrum of the reflective sheet is 100 nm or longer, and in a case where a wavelength on a short wavelength side that defines the half-width is represented by λα, a wavelength on a long wavelength side that defines the half-width is represented by λβ, a center wavelength that defines the half-width is represented by λC, λ1=(λα+λC/2, and λ2=(λC+λβ)/2, the following Expressions (1) and (2) are satisfied. I−R(λ1)>I−R(λ2) Expression (1) SCE(λ1)/I−R(λ1)>SCE(λ2)/I−R(λ2) Expression (2)
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公开(公告)号：US20220214576A1
公开(公告)日：2022-07-07
申请号：US17701033
申请日：2022-03-22
Applicant: FUJIFILM Corporation
Inventor： Nobuhiko ICHIHARA , Hirofumi TOYAMA
IPC: G02F1/137 , G02F1/1337
Abstract: Provided is a new optical element that can be used for various applications. The optical element includes: a liquid crystal layer where a liquid crystal compound is aligned; and a polymer layer that is laminated on the liquid crystal layer, in which the optical element is reversibly switchable between a reference form and a first form where a film thickness distribution of the liquid crystal layer is less than that of the reference form.
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公开(公告)号：US20180052264A1
公开(公告)日：2018-02-22
申请号：US15796531
申请日：2017-10-27
Applicant: FUJIFILM Corporation
Inventor： Yukito SAITOH , Yujiro YANAI , Akira YAMAMOTO , Nobuhiko ICHIHARA , Daisuke KASHIWAGI , Michio NAGAI
CPC classification number: G02B5/26 , G02B5/201 , G03B21/567 , G03B21/60 , G03B21/62
Abstract: A transparent screen includes a substrate capable of transmitting light; and a plurality of dots formed on a surface of the substrate, each of the dots having wavelength-selective reflectivity and being formed of a liquid crystal material having a cholesteric structure, in which the cholesteric structure gives a striped pattern of bright parts and dark parts in a cross-sectional view of the dot observed by a scanning electron microscope, the dot includes a portion having a height that increases continuously to the maximum height in a direction extending from the edge toward the center of the dot, the angle formed by the normal line to a line that is formed by a first one of the dark parts as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot, in the portion, is in the range of 70° to 90°, and a plurality of dot row units in which two or more dots are adjacently arranged along one direction are formed.
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公开(公告)号：US20170269272A1
公开(公告)日：2017-09-21
申请号：US15616398
申请日：2017-06-07
Applicant: FUJIFILM Corporation
Inventor： Daisuke KASHIWAGI , Yoji ITO , Michio NAGAI , Akira YAMAMOTO , Nobuhiko ICHIHARA , Hideyuki NAKAMURA
IPC: G02B5/30 , G06F3/0354 , G06F3/042
CPC classification number: G02B5/3016 , G06F3/0321 , G06F3/03545 , G06F3/0421
Abstract: Provided is an optical member including: a substrate; and a dot that is in contact with a surface of the substrate, in which the dot is formed of a liquid crystal material having a cholesteric structure, four or more dots form one recognition effective region as an aggregate, and a shortest inter-end distance between one arbitrary dot and at least two other dots in the recognition effective region is 10 μm or less. in the optical member, even when a dot pattern is observed in an oblique direction, retroreflection properties are exhibited and the intensity of reflected light is high. By using the optical member according to the present invention, an image display device having a high data input sensitivity can be provided.
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Patent Agency Ranking
公开(公告)号：US20160124529A1
公开(公告)日：2016-05-05
申请号：US14927876
申请日：2015-10-30
Applicant: FUJIFILM Corporation
Inventor： Akira YAMAMOTO , Yoji ITO , Michio NAGAI , Daisuke KASHIWAGI , Nobuhiko ICHIHARA
IPC: G06F3/0354
CPC classification number: G06F3/03545 , G06F3/0321 , G06K9/2063 , G06K9/22 , G06K9/222 , G06K9/3216 , G06K19/06037
Abstract: The information processor includes an input unit having an illuminating part and an image pickup part, and an input medium having an input surface on which inputting of information is carried out by the input unit which has position coordinates on the input surface coded by a dot pattern. The input unit irradiates light from the illuminating part onto input surface of the input medium. The irradiated light reflects off the dot contained in the dot pattern which is picked up by the image pickup part, and position information of the dot pattern is obtained. The input unit further has an input unit angular position measuring part that measures an angular position of the input unit when the light is irradiated. Based on corrected position information obtained by correction processing based on the angular position, input information, that is specified by the position coordinates is obtained.
Abstract translation: 信息处理器包括具有照明部分和图像拾取部分的输入单元，以及具有输入表面的输入介质，输入单元在输入单元上执行信息输入，该输入单元在由点图案编码的输入表面上具有位置坐标 。 输入单元将来自照明部的光照射到输入介质的输入面。 被照射的光从包含在由图像拾取部拾取的点图案中的点反射，并且获得点图案的位置信息。 输入单元还具有输入单元角位置测量部，其在照射光时测量输入单元的角位置。 基于通过基于角位置的校正处理获得的校正位置信息，获得由位置坐标指定的输入信息。
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公开(公告)号：US20220214483A1
公开(公告)日：2022-07-07
申请号：US17701058
申请日：2022-03-22
Applicant: FUJIFILM Corporation
Inventor： Nobuhiko ICHIHARA , Hirofumi TOYAMA
IPC: G02B5/30
Abstract: Provided is a new optical element that can be used for various applications. The optical element includes a liquid crystal layer where alignment of a liquid crystal compound is immobilized and a film thickness distribution satisfies 1.1
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公开(公告)号：US20180074315A1
公开(公告)日：2018-03-15
申请号：US15819533
申请日：2017-11-21
Applicant: FUJIFILM Corporation
Inventor： Yujiro YANAI , Akira YAMAMOTO , Michio NAGAI , Yukito SAITOH , Daisuke KASHIWAGI , Nobuhiko ICHIHARA
CPC classification number: G02B27/0101 , B60K35/00 , B60K2350/2052 , B60K2350/921 , G02B5/26 , G02B2027/0123 , G02F1/13718
Abstract: Provided is a member for displaying a projected image, including: a first base material; a second base material; and an optical member, in which at least one optical member is disposed on a surface of the first base material or the second base material, the optical member includes a plurality of cholesteric liquid crystal dots, the cholesteric liquid crystal dot is formed of a liquid crystal material having a cholesteric structure, the cholesteric structure imparts a striped pattern formed of bright portions and dark portions in a cross-sectional image of the cholesteric liquid crystal dot taken by a scanning electron microscope in a direction perpendicular to a substrate, the dot includes a portion where the height thereof successively increases to the maximum height thereof from an end portion toward the center thereof, an angle between a normal line with respect to a line formed by the first dark portion from the surface of the dot on a side opposite to the substrate and a line representing the surface of the is in a range of 70° to 90° in this portion of the cross-sectional image, and a reflection center wavelength of the dot is in a range of 400 to 1000 nm.
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公开(公告)号：US20180003869A1
公开(公告)日：2018-01-04
申请号：US15704572
申请日：2017-09-14
Applicant: FUJIFILM Corporation
Inventor： Akira YAMAMOTO , Yoji ITO , Michio NAGAI , Daisuke KASHIWAGI , Nobuhiko ICHIHARA
CPC classification number: G02B5/136 , G02B1/02 , G02B5/0226 , G02B5/0284 , G02B5/208 , G02B5/26 , G02F2201/343 , G06F3/0317
Abstract: An optical member includes: a substrate; and a dot formed on a surface of the substrate. The dot has wavelength selective reflecting properties, and a cholesteric structure which has a stripe pattern including bright and dark portions in a cross-sectional view of the dot when observed with a scanning electron microscope. A surface shape of the dot opposite to the substrate in a cross-section of the dot in a thickness direction has at least one inflection point. In the cross-section, an angle between a normal line perpendicular to a line, formed using a first dark portion from a surface of the dot opposite to the substrate, and the surface of the dot, is in a range of 70° to 90°. A proportion of a retroreflective area of the optical member is high when observed after light irradiation from an oblique direction to a normal direction perpendicular to the optical member.
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公开(公告)号：US20170227692A1
公开(公告)日：2017-08-10
申请号：US15496622
申请日：2017-04-25
Applicant: FUJIFILM Corporation
Inventor： Michio NAGAI , Yoji ITO , Daisuke KASHIWAGI , Akira YAMAMOTO , Nobuhiko ICHIHARA , Hideyuki NAKAMURA
CPC classification number: G02B5/26 , G06F3/0321 , G06F3/03545 , G06F3/0421
Abstract: The optical member of the present invention includes: a substrate; and a dot that is in contact with a surface of the substrate, in which the dot has wavelength selective reflecting properties, the dot is formed of a liquid crystal material having a cholesteric structure, the cholesteric structure has a stripe pattern including bright portions and dark portions in a cross-sectional view of the dot when observed with a scanning electron microscope, the dot includes a portion having a height which continuously increases to a maximum height in a direction moving from an end portion of the dot to the center of the dot, in the portion, an angle between a normal line perpendicular to a line, which is firmed using a first dark portion from a surface of the dot, and the surface is in a range of 70° to 90°, and the liquid crystal material includes a surfactant.
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