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

IPC: G02B5/02 ,  B29D11/00 ,  G02B5/20

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)

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

IPC: G02B5/26 ,  G06F3/042

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.

公开(公告)号：US20200326462A1

公开(公告)日：2020-10-15

申请号：US16913858

申请日：2020-06-26

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Michio NAGAI ,  Hiroshi SATO

IPC: G02B5/30 ,  G01S17/10 ,  G01S17/931 ,  G01S7/481

Abstract: An object is to provide an optical element that is thin and can gather and reflect light in a specific wavelength range in a predetermined direction, and a sensor including the above-described optical element. The optical element includes a cholesteric liquid crystal layer, in which the cholesteric liquid crystal layer has a liquid crystal alignment pattern in which a direction of an optical axis derived from a liquid crystal compound changes while continuously rotating in at least one in-plane direction, and in a case where a length over which the direction of the optical axis rotates by 180° in the in-plane direction in which the direction of the optical axis changes while continuously rotating is set as a single period, the cholesteric liquid crystal layer has in-plane regions having different lengths of the single periods in the liquid crystal alignment pattern.

公开(公告)号：US20190079380A1

公开(公告)日：2019-03-14

申请号：US16178165

申请日：2018-11-01

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Michio NAGAI ,  Akira YAMAMOTO

IPC: G03B21/62 ,  G02B5/30 ,  G02B27/09

Abstract: Provided are a transparent screen having high transparency in which a hot spot caused by transmitted light can be reduced; and an image display system in which visibility of a screen is excellent and a hot spot is reduced by using the transparent screen. The transparent screen includes, in this order: a first λ/4 plate; a reflecting layer that has a structure obtained by immobilizing a cholesteric liquid crystalline phase and reflects a part of incidence light; and a polarizing film that has an absorption axis in a thickness direction.

公开(公告)号：US20190064411A1

公开(公告)日：2019-02-28

申请号：US16169638

申请日：2018-10-24

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Akira YAMAMOTO ,  Michio NAGAI

IPC: G02B5/30 ,  G03B21/14 ,  G03B21/604 ,  G03B21/62 ,  H04N9/31

Abstract: An object is to provide: a transparent screen having high transparency in which a hot spot caused by transmitted light can be reduced; and an image display system in which visibility of a screen is excellent and a hot spot is reduced by using the transparent screen. The object is achieved by the transparent screen including: a dot array in which dots obtained by immobilizing a cholesteric liquid crystalline phase are two-dimensionally arranged; and a layer that is obtained by immobilizing a cholesteric liquid crystalline phase.

公开(公告)号：US20190041270A1

公开(公告)日：2019-02-07

申请号：US16146131

申请日：2018-09-28

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Jun TAKEDA ,  Michio NAGAI ,  Akira YAMAMOTO

IPC: G01J4/04 ,  H01L27/146 ,  G02B5/30 ,  G01N21/21

Abstract: An object of the invention is to provide an optical laminated film capable of detecting a light polarization state with a simple configuration using components which are superior in productivity and have high versatility, and a polarization imaging sensor using the optical laminated film. An optical laminated film includes: first and second phase difference plates, each having a patterned optical anisotropic layer; and a polarizing plate having a polarization axis in one direction, the patterned optical anisotropic layers have a constant phase difference, are divided into a plurality of belt-like regions in the same plane, and have a plurality of units, each formed of the plurality of belt-like regions in which slow axis directions in one belt-like region coincide with each other, and slow axis directions in the respective belt-like regions are all different, and the first phase difference plate, the second phase difference plate, and the polarizing plate are laminated in this order such that the belt-like regions of the two phase difference plates intersect with each other.

公开(公告)号：US20180321577A1

公开(公告)日：2018-11-08

申请号：US16015513

申请日：2018-06-22

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Akira YAMAMOTO ,  Michio NAGAI

IPC: G03B21/60

Abstract: According to the present invention, there is provided a plurality of protruding portions that are formed on one surface of the support and have inclined surfaces parallel to each other; a cholesteric liquid crystal layer that is formed on each of the inclined surfaces of the protruding portions; and an overcoat layer that is laminated on the surface of the support on which the protruding portions are formed so as to cover the cholesteric liquid crystal layer, in which a normal line of each of the inclined surfaces of the protruding portions is parallel to a spiral axis of the cholesteric structure of the cholesteric' liquid crystal layer, an angle formed between a normal line of a surface of the overcoat layer and the spiral axis of the cholesteric structure is 5° to 42°, a difference in refractive index between the cholesteric liquid crystal layer and the protruding portion and a difference in refractive index between the cholesteric liquid crystal layer and the overcoat layer are 0.2 or less.

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

IPC: G02B5/26 ,  G03B21/60

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.

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.

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。