公开(公告)号：US20240219764A1

公开(公告)日：2024-07-04

申请号：US18283921

申请日：2022-03-25

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroyuki TAKEMOTO ,  Masanori OTSUKA ,  Keita KANEKO ,  Akihiro SHIBUYA ,  Mariko HIRAI

IPC: G02F1/1334

CPC classification number: G02F1/1334

Abstract: A polymer dispersed liquid crystal (PDLC) film achieves a haze (light diffusibility) capable of exhibiting a shielding function, and improved backscattering ratio. The PDLC film according to an embodiment of the present invention includes a first transparent conductive film, a polymer dispersed liquid crystal layer, and a second transparent conductive film in the stated order. The polymer dispersed liquid crystal layer contains a polymer matrix and droplets of a liquid crystal compound dispersed in the polymer matrix. An average particle diameter of the droplets when viewed from a direction perpendicular to a main surface of the PDLC film is from 0.3 μm to 0.9 μm. A volume ratio of the droplets in the polymer dispersed liquid crystal layer is from 20% to 70%. The liquid crystal compound has a birefringence of from 0.20 to 0.50. The polymer dispersed liquid crystal layer has a thickness of from 5 μm to 40 μm.

公开(公告)号：US20220146922A1

公开(公告)日：2022-05-12

申请号：US17599496

申请日：2020-03-27

Applicant: NITTO DENKO CORPORATION

Inventor： Masanori OTSUKA ,  Hiroyuki TAKEMOTO

IPC: G03B21/60 ,  G02F1/137 ,  G02F1/1343

Abstract: The present invention provides a transmissive screen including a light control layer, the screen being reduced in reflection scattering toward an image source, and an image display apparatus using the transmissive screen.

公开(公告)号：US20160054485A1

公开(公告)日：2016-02-25

申请号：US14783712

申请日：2013-04-10

Applicant: NITTO DENKO CORPORATION

Inventor： Kozo NAKAMURA ,  Hiroyuki TAKEMOTO

IPC: G02B5/02

CPC classification number: G02B5/0242 ,  G02B5/0268 ,  G02B5/0278

Abstract: An object of the present invention is to provide a light diffusing element having a high haze value, strong diffusibility, a smooth surface, and suppressed backscattering. The light diffusing element of the present invention includes: a matrix including a resin component and ultrafine particle components; and light diffusing fine particles dispersed in the matrix, in which part of the resin component permeates the light diffusing fine particles, and a permeation range of the resin component in the light diffusing fine particles is 90% or more with respect to an average particle diameter of the light diffusing fine particles in the light diffusing element, and in which the light diffusing element has an arithmetic average surface roughness Ra of 0.04 μm or less.

Abstract translation: 本发明的目的是提供一种具有高雾度值，强扩散性，光滑表面和抑制后向散射的光漫射元件。 本发明的光漫射元件包括：包含树脂成分和超微粒成分的基体; 以及分散在基质中的微粒，其中树脂成分的一部分透过光扩散性微粒，并且光漫射微粒中的树脂成分的透过范围相对于平均粒径为90％以上 的光漫射元件中的光漫射微粒，其中光漫射元件的算术平均表面粗糙度Ra为0.04μm以下。

公开(公告)号：US20230341721A1

公开(公告)日：2023-10-26

申请号：US17916208

申请日：2021-03-29

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroyuki TAKEMOTO ,  Jin YOSHIKAWA ,  Masanori OTSUKA ,  Mariko HIRAI

IPC: G02F1/1334 ,  B32B27/36 ,  B32B27/08 ,  B32B37/24

CPC classification number: G02F1/1334 ,  B32B27/36 ,  B32B27/08 ,  B32B37/24 ,  B32B2255/20 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2255/28 ,  B32B2307/412 ,  B32B2307/202 ,  B32B2457/202 ,  B32B2250/244 ,  B32B2250/02 ,  B32B2037/243

Abstract: According to the present invention, provided is a PDLC film, which includes a PDLC layer excellent in thickness uniformity and is suppressed from causing liquid crystal leakage from the PDLC layer. A method of producing a polymer dispersed liquid crystal film of the present invention includes: applying, to a first transparent conductive film, an emulsion including a solvent, and polymer particles and liquid crystal particles dispersed in the solvent to form an applied layer; drying the applied layer to form a polymer dispersed liquid crystal layer containing a polymer matrix and the liquid crystal particles dispersed in the polymer matrix; and laminating a second transparent conductive film on the polymer dispersed liquid crystal layer, wherein the polymer particles include first polymer particles and second polymer particles, and wherein an average particle diameter of the second polymer particles is larger than an average particle diameter of the first polymer particles.

公开(公告)号：US20170341336A1

公开(公告)日：2017-11-30

申请号：US15539928

申请日：2015-12-25

Applicant: Nitto Denko Corporation

Inventor： Hiromoto HARUTA ,  Hiroyuki TAKEMOTO ,  Daisuke HATTORI ,  Kozo NAKAMURA

IPC: B32B5/18 ,  B32B27/06 ,  B32B7/02 ,  G02B1/10 ,  B32B37/14

CPC classification number: B32B5/18 ,  B32B7/02 ,  B32B27/06 ,  B32B37/14 ,  B32B2551/00 ,  C08J7/047 ,  C08J2483/04 ,  G02B1/10

Abstract: The present invention provides a new member having a low refractive index as a substitute for an air layer, for example. The laminated film roll of the present invention includes a long laminated film roll including: an ultra-low refractive index layer having a refractive index of 1.20 or less; and a resin film, wherein the ultra-low refractive index layer is stacked on the resin film. The method of forming the long laminated film roll of the present invention includes steps of: preparing a liquid containing microporous particles; coating a resin film with the liquid; and drying the liquid applied on the resin film, for example.