公开(公告)号：US20220011618A1

公开(公告)日：2022-01-13

申请号：US17487490

申请日：2021-09-28

Applicant: FUJIFILM Corporation

Inventor： Ryuji SANETO ,  Akira YAMAMOTO ,  Hideki KANEIWA ,  Makoto ISHIGURO ,  Michio NAGAI

IPC: G02F1/137 ,  B32B7/023 ,  G02B5/08

Abstract: Provided are a reflective sheet including a cholesteric liquid crystal layer and having excellent reflection wavelength range, diffuse reflectivity, reflectivity, hardness, and scratch resistance; and a transfer film for a reflective sheet that is used for the reflective sheet. The reflective sheet includes a substrate, an adhesive layer, a cholesteric liquid crystal layer, and a hard coat layer in this order, in which in a cross-section of the cholesteric liquid crystal layer observed, at least a part of bright portions and dark portions has a flapping structure, the cholesteric liquid crystal layer has a pitch gradient structure in which a helical pitch changes in a thickness direction, and the helical pitch on the adhesive layer side is larger than that on the hard coat layer side.

公开(公告)号：US20190094432A1

公开(公告)日：2019-03-28

申请号：US16197799

申请日：2018-11-21

Applicant: FUJIFILM Corporation

Inventor： Yujiro YANAI ,  Michio NAGAI ,  Akira YAMAMOTO

IPC: G02B5/30 ,  G03B21/28 ,  G03B21/60 ,  G09F15/02

Abstract: Provided are a transparent film that allows scenery to be observed without color unevenness in a state where light is not irradiated, a transparent screen and an image display system including the transparent film, and a transparent poster. The transparent film includes: a support; a dot array that is formed on one surface of the support and in which dots obtained by immobilizing a cholesteric liquid crystalline phase are two-dimensionally arranged; and an overcoat layer that covers the dots and is laminated on the support, in which areas of the dots and distances between the dots are made to be irregular. As a result, the object is achieved.

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

IPC: G02B27/01 ,  G02B5/26 ,  B60K35/00

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.

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

IPC: G02B5/136 ,  G02B5/02 ,  G02B1/02 ,  G02B5/26 ,  G02B5/20

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.

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

IPC: G02B5/26 ,  G06F3/042

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.

公开(公告)号：US20160245968A1

公开(公告)日：2016-08-25

申请号：US15044578

申请日：2016-02-16

Applicant: FUJIFILM Corporation

Inventor： Nobuhiko ICHIHARA ,  Yoji ITO ,  Michio NAGAI ,  Daisuke KASHIWAGI ,  Akira YAMAMOTO

IPC: G02B5/26 ,  G02F1/1337

CPC classification number: G02F1/133711 ,  G02B5/208 ,  G02B5/26 ,  G02F1/13338 ,  G06F3/0321 ,  G06F3/03545 ,  G06K9/222

Abstract: An optical member having a base and an underlayer with a region A of surface energy AE and a region B of surface energy BE (BE-AE>0 mN/m), in which a dot of a wavelength-selective reflective cholesteric structure is disposed on the region B, has high pattern position accuracy for the patterns formed with the dots.

Abstract translation: 具有基底和具有表面能量AE的区域A和表面能BE（BE-AE> 0mN / m）的区域B的基底和波长选择性反射胆甾型结构的点的底层的光学构件 在区域B上，对于由点形成的图案具有高图案位置精度。

公开(公告)号：US20150029445A1

公开(公告)日：2015-01-29

申请号：US14325875

申请日：2014-07-08

Applicant: FUJIFILM Corporation

Inventor： Jun TAKEDA ,  Shunya KATOH ,  Michio NAGAI ,  Yoji ITO

IPC: G02B5/30 ,  G02F1/13363

CPC classification number: G02B5/3016 ,  G02F1/13363 ,  G02F2001/133633 ,  Y10T428/10 ,  Y10T428/1036 ,  Y10T428/105

Abstract: A retardation film includes a first optically anisotropic layer having liquid crystal compounds fixed in a homogeneously aligned state and a leveling agent, and having an order parameter of 0.75 to 0.95 and a thickness of 0.3 to 3.0 μm; an intermediate layer including a resin having a solubility parameter SP value of 21.5 to 24.7, calculated by Hoy's method, the intermediate layer having a thickness of 3.0 μm or less; and a second optically anisotropic layer having liquid crystal compounds fixed in a homeotropically aligned state, and having an order parameter OP of 0.6 to 0.95 and a thickness of 0.3 to 3.0 μm, wherein OP is represented by the following equation; OP=(A∥−A⊥)/(2A⊥+A∥) where A∥ is absorbance of the liquid crystal compounds for light polarized parallel to an alignment direction, and A⊥ is absorbance of the liquid crystal compounds for light polarized perpendicular to the alignment direction.

Abstract translation: 延迟膜包括具有均匀取向状态的液晶化合物的第一光学各向异性层和流平剂，并且具有0.75至0.95的顺序参数和0.3至3.0μm的厚度; 中间层，其具有通过Hoy's方法计算的溶度参数SP值为21.5〜24.7的树脂，中间层的厚度为3.0μm以下; 和具有固定在垂直取向状态的液晶化合物的第二光学各向异性层，并且具有0.6至0.95的阶数参数OP和0.3至3.0μm的厚度，其中OP由下式表示; OP =（A∥-A⊥）/（2A⊥+A‖）其中A∥是与取向方向平行偏光的液晶化合物的吸光度，A⊥是用于光偏振垂直的液晶化合物的吸光度 到排列方向。

公开(公告)号：US20210223445A1

公开(公告)日：2021-07-22

申请号：US17214076

申请日：2021-03-26

Applicant: FUJIFILM Corporation

Inventor： Makoto ISHIGURO ,  Hideki KANEIWA ,  Nobuhiko ICHIHARA ,  Akira YAMAMOTO ,  Ryuji SANETO ,  Michio NAGAI

IPC: G02B5/02

Abstract: Provided is a reflective sheet that includes a reflective layer having a wide reflection wavelength range, excellent diffusion reflection properties, and inconspicuous defects. The reflective sheet includes a plurality of reflective layers that are laminated, the reflective layers being obtained by immobilizing a cholesteric liquid crystalline phase, in a cross-section of the reflective layer observed with a scanning electron microscope, at least a part of bright portions and dark portions derived from the cholesteric liquid crystalline phase has a flapping structure, a helical pitch in one or more reflective layers changes in a thickness direction, and a thickness of a reflective layer that is formed on a surface other than a surface of the reflective layer is less than those of other reflective layers.

公开(公告)号：US20180107106A1

公开(公告)日：2018-04-19

申请号：US15841606

申请日：2017-12-14

Applicant: FUJIFILM Corporation

Inventor： Nobuhiko ICHIHARA ,  Yujiro YANAI ,  Akira YAMAMOTO ,  Michio NAGAI ,  Daisuke KASHIWAGI ,  Yukito SAITOH

IPC: G03B21/608 ,  G02B5/24 ,  G02B5/09 ,  G02F1/1335

CPC classification number: G03B21/608 ,  G02B5/09 ,  G02B5/10 ,  G02B5/201 ,  G02B5/24 ,  G02B5/26 ,  G02B5/3016 ,  G02B27/26 ,  G02F1/133528 ,  G02F2001/133541 ,  G03B21/604 ,  G03B21/62 ,  G03B35/26

Abstract: A transparent screen for 3D display having excellent transparency and an excellent viewing angle, and a 3D display system are provided. The transparent screen for 3D display has a plurality of dots, each of the dots having wavelength selectivity 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, in the portion, the angle formed by the normal line to a line that is formed by a first dark part as counted from the surface of the dot on the opposite side of the substrate and the surface of the dot is in the range of 70° to 90°, and right-handed circularly polarized light and left-handed circularly polarized light are reflected by the plurality of dots.

公开(公告)号：US20170343830A1

公开(公告)日：2017-11-30

申请号：US15678498

申请日：2017-08-16

Applicant: FUJIFILM Corporation

Inventor： Michio NAGAI ,  Yoji ITO ,  Akira YAMAMOTO ,  Yukito SAITOH ,  Yujiro YANAI ,  Daisuke KASHIWAGI ,  Nobuhiko ICHIHARA

IPC: G02B27/28

CPC classification number: G02B27/288 ,  G02B5/0215 ,  G02B5/0236 ,  G02B5/0284 ,  G02B5/201 ,  G02B5/3016 ,  G02B27/26 ,  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 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, and in the portion, 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 is in the range of 70° to 90°.