公开(公告)号：US20180039138A1

公开(公告)日：2018-02-08

申请号：US15724726

申请日：2017-10-04

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki IIDA ,  Takeharu KITAGAWA

IPC: G02F1/13363 ,  G02F1/1335 ,  G02F1/1333 ,  G02F1/1343

CPC classification number: G02F1/133634 ,  G02F1/133528 ,  G02F1/134363 ,  G02F2001/133311 ,  G02F2201/50 ,  G02F2202/40 ,  G02F2203/64 ,  G02F2413/06 ,  G02F2413/12 ,  G02F2413/13 ,  G02F2413/14

Abstract: A liquid crystal panel which is capable of significantly reducing a thickness thereof as compared to conventional liquid crystal panels, and, when used in a liquid crystal display device using a liquid crystal cell such as an IPS-type liquid crystal cell, reducing oblique light leakage in a black state of the liquid crystal display device to enhance contrast.

公开(公告)号：US20180017714A1

公开(公告)日：2018-01-18

申请号：US15516439

申请日：2015-10-02

Applicant: NITTO DENKO CORPORATION

Inventor： Hirofumi NOMOTO ,  Nobuyuki HAITA ,  Takeharu KITAGAWA

IPC: B32B27/08 ,  G02B5/30 ,  B32B7/02 ,  B32B27/30

CPC classification number: G02B1/14 ,  B32B7/02 ,  B32B27/08 ,  B32B27/30 ,  B32B27/306 ,  B32B2307/412 ,  B32B2307/42 ,  B32B2307/584 ,  G02B5/3033 ,  G02F2201/50

Abstract: The optical film laminate comprises: a polarizing film which is formed of a polyvinyl alcohol-based resin containing a molecularly-oriented dichroic martial, and has a thickness of 10 μm or less; and a transparent protective film formed of a thermoplastic resin and disposed on one of opposite surfaces of the polarizing film through an adhesive layer. The transparent protective film has a thickness of 40 μm or less, and a dimensional change rate in a direction orthogonal to an absorption axis of the polarizing film is 0.2% or more, as measured using a test piece thereof having a size of 100 mm×100 mm, in a state after leaving the test piece in an environment at 85° C. for 48 hours.

公开(公告)号：US20160054494A1

公开(公告)日：2016-02-25

申请号：US14918186

申请日：2015-10-20

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu KITAGAWA ,  Takuya Nakazono ,  Shusaku Goto ,  Minoru Miyatake ,  Tomohiro Mori ,  Takashi Kamijo

IPC: G02B5/30 ,  G02B27/28 ,  G02B1/08

CPC classification number: G02B5/305 ,  G02B1/08 ,  G02B5/3033 ,  G02B27/288 ,  Y10T428/1041 ,  Y10T428/14 ,  Y10T428/15

Abstract: A method of producing a roll of a continuous web of an optical film laminate, usable in a process of laminating an optical film sheet including a polarizing film and formed to a size corresponding to that an optical panel to a surface of the optical panel being fed to a lamination position, is disclosed. The polarizing film is prepared by subjecting a laminate including a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to uniaxial 2-stage stretching to reduce a thickness of the PVA type resin layer to 10 μm or less, and causing a dichroic material to be absorbed in the PVA type resin layer. A carrier film is releasably attached to the continuous web of optical film laminate including the polarizing film, through an adhesive layer. A defect inspection is performed for the optical film laminate and the adhesive layer.

Abstract translation: 一种制造光学膜层叠体的连续卷筒纸的方法，可用于将包括偏振膜的光学膜片层压并且形成为与所述光学板相对应的尺寸的光学膜片的工艺，以提供给被馈送的光学板的表面 公开了层压位置。 通过对形成在基板上的热塑性树脂基板和PVA型树脂层的层叠体进行单轴2级拉伸，将PVA类树脂层的厚度缩小到10μm以下，制作偏光膜， 二色性材料被吸收在PVA型树脂层中。 载体膜通过粘合剂层可释放地附着到包括偏振膜的光学膜层压板的连续幅材上。 对光学膜层叠体和粘合剂层进行缺陷检查。

公开(公告)号：US20150043070A1

公开(公告)日：2015-02-12

申请号：US14448313

申请日：2014-07-31

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu KITAGAWA ,  Shusaku GOTO

IPC: G02B5/30 ,  H05B33/02 ,  G02B1/10 ,  G02B1/08

CPC classification number: G02B5/305 ,  B29C55/023 ,  B29C55/06 ,  B29K2029/04 ,  B29K2067/003 ,  B29K2995/0034 ,  G02B1/10 ,  G02B5/3033 ,  H05B33/02

Abstract: The present invention addresses a problem that a conventional thinned and high-transmittance polarizing plate has poor durability.Provided is a polarizing film in the form of a continuous web, which is comprised of a polyvinyl alcohol-based resin containing potassium and molecularly-oriented iodine, wherein the polarizing film has a thickness of 7 μm or less, and exhibits a single transmittance of 44.0% or more, and wherein a mole ratio (PK) of elemental iodine (I) to elemental potassium (K) contained in the polarizing film is 1.8 or more.

Abstract translation: 本发明解决了传统的薄型和高透光性偏振片的耐久性差的问题。 本发明提供一种由含有钾和分子取向的碘的聚乙烯醇类树脂构成的连续纤维网形式的偏振膜，其中偏振膜的厚度为7μm以下，并且具有单一透射率 44.0％以上，偏光膜中所含的元素碘（I）与元素钾（K）的摩尔比（PK）为1.8以上。

公开(公告)号：US20150316696A1

公开(公告)日：2015-11-05

申请号：US14647534

申请日：2014-02-06

Applicant: NITTO DENKO CORPORATION

Inventor： Takashi KAMIJO ,  Akinori IZAKI ,  Takeharu KITAGAWA ,  Shusaku GOTO ,  Daigoro NAKAGAWA

IPC: G02B5/30 ,  G02B1/14

CPC classification number: G02B1/14 ,  B32B7/02 ,  B32B7/12 ,  B32B27/08 ,  B32B27/306 ,  B32B2307/412 ,  B32B2307/418 ,  B32B2307/42 ,  B32B2457/20 ,  B32B2457/202 ,  B32B2457/206 ,  G02B1/11 ,  G02B1/111 ,  G02B5/3033 ,  G02B5/3083

Abstract: An optical laminate in which a polarizing film including a polyvinyl alcohol-based resin having oriented iodine is bonded on a first surface of the polarizing film to an optical film through an optically transparent adhesive layer is provided. The polarizing film exhibits a property that a value expressed by the following formula: Aa×(Is/Ia), is 0.53 or more, where: Aa represents an absorbance; Ia represents a value obtained by integrating a distribution of integrated intensities in the thickness direction of the polarizing film; and Is represents a value obtained by integrating, a distribution of integrated intensities in the thickness direction of the polarizing film; and the adhesive layer exhibits a property that a difference between a refractive index of the adhesive layer and a refractive index in the absorption axis direction of the polarizing film at the first surface of the polarizing film is 0.08 or less.

Abstract translation: 提供了一种光学层叠体，其中包括具有取向碘的聚乙烯醇系树脂的偏振膜通过光学透明粘合剂层粘合在偏振膜的第一表面上与光学膜。 该偏光膜具有下述式所表示的值：Aa×（Is / Ia）为0.53以上，其中：Aa表示吸光度; Ia表示通过对偏振膜的厚度方向的积分强度分布进行积分而得到的值; Is表示通过对偏振膜的厚度方向的积分强度的分布进行积分而得到的值; 并且粘合剂层具有粘合剂层的折射率与偏振膜的第一表面的偏振膜的吸收轴方向的折射率之间的差为0.08以下的性质。

公开(公告)号：US20140044947A1

公开(公告)日：2014-02-13

申请号：US13933055

申请日：2013-07-01

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroaki SAWADA ,  Takeharu KITAGAWA ,  Takashi KAMIJO

IPC: G02B1/08

CPC classification number: G02B1/08 ,  B32B2457/202 ,  C08J5/18 ,  C08J7/04 ,  C08J2385/04 ,  C08J2429/04 ,  G02B5/3033 ,  Y10T428/265

Abstract: A method for producing a polarizer (20) comprises the steps of: (A) stretching a polyvinyl alcohol-based resin layer (10) to obtain a stretched layer (14); (B) immersing the stretched layer (14) in a dyeing liquid (23) containing iodine to obtain a dyed layer (18) in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (C) removing a part of iodine adsorbed in the dyed layer (18) so that the absorbance of the dyed layer (18) decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer (18) is controlled so that it does not become less than 0.3.

公开(公告)号：US20130329289A1

公开(公告)日：2013-12-12

申请号：US13907391

申请日：2013-05-31

Applicant: NITTO DENKO CORPORATION

Inventor： Nobuyuki HAIDA ,  Shusaku GOTO ,  Takeharu KITAGAWA

IPC: G02B1/04

CPC classification number: G02B1/04 ,  G02B1/08 ,  G02B5/3033 ,  G02B5/3083 ,  G02F1/133528 ,  C08L29/04

Abstract: [TECHNICAL PROBLEM]Provided a polarizing film which comprising a substrate and a PVA-based resin, wherein it has good adhesion between the substrate and the PVA-based resin to allow the PVA-based resin to become less likely to be peeled off from the substrate during stretching and/or conveyance, and exhibits excellent appearance.[SOLUTION]The polarizing film is obtained by providing a layer of a PVA-based resin on a substrate and stretching the substrate and the PVA-based resin layer together. The PVA-based resin contains a modified PVA, wherein the modified PVA exists in an amount allowing a modification rate with respect to the entire PVA-based resin to be in a range of 0.04 mol % to 1.4 mol %.

Abstract translation: 技术问题提供一种偏振膜，其包含基材和PVA类树脂，其中基材和PVA类树脂之间具有良好的粘附性，以使PVA类树脂变得不太可能从 基材在拉伸和/或输送过程中，并且表现出优异的外观。 [解决方案]通过在基板上设置PVA基树脂层并将基板和PVA类树脂层一起拉伸而获得偏振膜。 PVA类树脂含有改性PVA，其中改性PVA的存在量允许相对于整个PVA类树脂的改性率在0.04mol％至1.4mol％的范围内。

公开(公告)号：US20170276851A1

公开(公告)日：2017-09-28

申请号：US15512328

申请日：2015-09-18

Applicant: NITTO DENKO CORPORATION

Inventor： Akinori IZAKI ,  Ryohei SAWAZAKI ,  Atsushi YASUI ,  Yuki KIDA ,  Takeharu KITAGAWA ,  Takuya MORI

IPC: G02B5/30

CPC classification number: G02B5/3041 ,  C08G2170/40

Abstract: Provided is a polarizing plate including an optical functional film and a polarizing film (polarizer), the polarizing plate being thin and excellent in durability of the polarizing film. The polarizing plate of the present invention includes an optical functional film, a pressure-sensitive adhesive layer, a polarizing film, and a protective film in the stated order, in which: the polarizing film has a thickness of 15 μm or less; the pressure-sensitive adhesive layer has a thickness of 15 μm or less; the optical functional film has a moisture permeability of 200 g/m2/24 h or less; and the protective film has a moisture permeability of 1,000 g/m2/24 h or less.

公开(公告)号：US20140186568A1

公开(公告)日：2014-07-03

申请号：US14200721

申请日：2014-03-07

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu KITAGAWA ,  Takuya NAKAZONO ,  Shusaku GOTO ,  Minoru MIYATAKE ,  Tomohiro MORI ,  Takashi KAMIJO

IPC: G02B5/30

CPC classification number: G02B5/305 ,  G02B1/08 ,  G02B5/3033 ,  G02B27/288 ,  Y10T428/1041 ,  Y10T428/14 ,  Y10T428/15

Abstract: A method of producing a roll of a continuous web of an optical film laminate, usable in a process of laminating an optical film sheet including a polarizing film and formed to a size corresponding to that an optical panel to a surface of the optical panel being fed to a lamination position, is disclosed. The polarizing film is prepared by subjecting a laminate including a thermoplastic resin substrate and a PVA type resin layer formed on the substrate, to uniaxial 2-stage stretching to reduce a thickness of the PVA type resin layer to 10 μm or less, and causing a dichroic material to be absorbed in the PVA type resin layer. A carrier film is releasably attached to the continuous web of optical film laminate including the polarizing film, through an adhesive layer. A defect inspection is performed for the optical film laminate and the adhesive layer.

Abstract translation: 一种制造光学膜层叠体的连续卷筒纸的方法，可用于将包括偏振膜的光学膜片层压并且形成为与所述光学板相对应的尺寸的光学膜片的工艺，以提供给被馈送的光学板的表面 公开了层压位置。 通过对形成在基板上的热塑性树脂基板和PVA型树脂层的层叠体进行单轴2阶段拉伸，将PVA类树脂层的厚度缩小到10μm以下，制作偏光膜， 二色性材料被吸收在PVA型树脂层中。 载体膜通过粘合剂层可释放地附着到包括偏振膜的光学膜层压板的连续幅材上。 对光学膜层叠体和粘合剂层进行缺陷检查。

公开(公告)号：US20130114139A1

公开(公告)日：2013-05-09

申请号：US13728473

申请日：2012-12-27

Applicant: NITTO DENKO CORPORATION

Inventor： Takeharu KITAGAWA ,  Takuya NAKAZONO ,  Shusaku GOTO ,  Minoru MIYATAKE ,  Tomohiro MORI ,  Takashi KAMIJO

IPC: G02B5/30

CPC classification number: G02B5/305 ,  B32B41/00 ,  B32B2457/20 ,  G02B5/3033

Abstract: A method of producing a roll of an optical film laminate strip including a polarizing film includes the steps of: forming a continuous web of optical film laminate including a polarizing film which consists of a polyvinyl alcohol type resin layer and has a thickness of 10 μm or less, wherein the polarizing film is formed by performing an stretching sub-step of subjecting a laminate comprising a continuous web of thermoplastic resin substrate and a polyvinyl alcohol type resin layer formed on the substrate, to a uniaxial stretching in a lengthwise direction of the laminate based on 2-stage stretching consisting of preliminary in-air stretching and in-boric-acid-solution stretching; cutting the continuous web of optical film laminate along a direction parallel to the length direction to form at least one continuous web of laminate strip having a given width; and winding the continuous web of laminate strip having the given width into a roll.

Abstract translation: 一种制造包括偏光膜的光学膜层压条的卷的方法包括以下步骤：形成包括由聚乙烯醇型树脂层组成的并具有10μm厚度的偏振膜的光学膜层压材料的连续幅材，或者 其特征在于，所述偏光膜是通过对形成在所述基材上的聚乙烯醇类树脂层的包含连续纤维网的层叠体在层叠体的长度方向进行单轴拉伸的拉伸工序进行拉伸， 基于由初步空气中拉伸和硼酸溶液拉伸组成的2段拉伸; 沿着与长度方向平行的方向切割光学膜层压板的连续卷材以形成具有给定宽度的至少一个连续的层压条带; 并将具有给定宽度的层压带的连续卷材卷绕成卷。