公开(公告)号：US20220107534A1

公开(公告)日：2022-04-07

申请号：US17261660

申请日：2020-08-19

Applicant: NITTO DENKO CORPORATION

Inventor： Daisuke Hayashi ,  Sohei Aruga ,  Toshiyuki Iida

IPC: G02F1/13363 ,  G02F1/1335

Abstract: There is provided a liquid crystal display apparatus having sufficiently small black brightness in an oblique direction. A liquid crystal display apparatus according to an embodiment of the present invention includes: a liquid crystal cell including a viewer-side substrate, a back surface-side substrate, and a homogeneously aligned liquid crystal layer sandwiched therebetween; a first polarizer arranged on a viewer side of the liquid crystal cell; a second polarizer arranged on a back surface side of the liquid crystal cell; a first optical compensation layer arranged between the liquid crystal cell and the first polarizer; and a second optical compensation layer arranged between the liquid crystal cell and the second polarizer. The viewer-side substrate and the back surface-side substrate each have a thickness direction retardation Rth(550) of from −10 nm to 100 nm, and a product A×E is 300 or less.

公开(公告)号：US10437095B2

公开(公告)日：2019-10-08

申请号：US15510703

申请日：2016-06-24

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Takeharu Kitagawa

IPC: G02F1/1335 ,  G02F1/13363 ,  G02B5/30 ,  G02F1/1333

Abstract: As a result of a reduction in thickness of an IPS liquid crystal display panel, curl has started to occur in a structure where an optical film such as a polarizer or a retardation film is laminated to the IPS liquid crystal display panel. The present invention is directed to thinning a polarizer which is easily expandable and contractable, and thinning a retardation film located between the polarizer and an IPS liquid crystal display panel to enable the polarizer to come closer to the IPS liquid crystal display panel than ever before to thereby prevent curl of the IPS liquid crystal display panel.

公开(公告)号：US20180348419A1

公开(公告)日：2018-12-06

申请号：US15779301

申请日：2016-11-18

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida

IPC: G02B5/30 ,  G02F1/13363 ,  G02F1/1335 ,  H01L27/32 ,  H01L51/52

Abstract: Provided is a polarizing plate with a retardation layer capable of realizing a liquid crystal display apparatus excellent in viewability when viewed through an optical member having polarizing action. The polarizing plate with a retardation layer has an elongate shape and includes, in this order: a retardation layer; a polarizer; and a pressure-sensitive adhesive layer. The retardation layer has an in-plane retardation Re(550) of from 100 nm to 180 nm, satisfies a relationship of Re(450) nz>ny, and has an Nz coefficient of from 0.2 to 0.8.

公开(公告)号：US09618795B2

公开(公告)日：2017-04-11

申请号：US15069132

申请日：2016-03-14

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Nao Murakami

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

CPC classification number: G02F1/13363 ,  G02F1/133634 ,  G02F1/134363 ,  G02F2413/02 ,  G02F2413/06 ,  G02F2413/11

Abstract: The liquid crystal panel includes a liquid crystal cell, a first polarizer on one side of the liquid crystal cell, a second polarizer on the other side of the liquid crystal cell, a first optically anisotropic element disposed between the liquid crystal cell and the first polarizer, and a second optically anisotropic element disposed between the first optically anisotropic element and the liquid crystal cell. Absorption axes of the first and the second polarizers are perpendicular to each other. The first optically anisotropic element has a slow axis direction parallel to the absorption axis direction of the first polarizer. The second optically anisotropic element has a slow axis direction perpendicular to the absorption axis direction of the first polarizer. The first and the second optically anisotropic elements each have in-plane and thickness-direction retardation values within specific ranges, respectively.

公开(公告)号：US20160291373A1

公开(公告)日：2016-10-06

申请号：US15076943

申请日：2016-03-22

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida

IPC: G02F1/13363 ,  G02F1/1337 ,  G02F1/1335

CPC classification number: G02F1/13363 ,  G02F1/134363 ,  G02F2413/02 ,  G02F2413/06 ,  G02F2413/08 ,  G02F2413/10 ,  G02F2413/11

Abstract: The liquid crystal panel includes a liquid crystal cell, a first polarizer on one side of the liquid crystal cell, a second polarizer on the other side of the liquid crystal cell, a first optically anisotropic element having a positive refractive index anisotropy disposed between the liquid crystal cell and the first polarizer, and a second optically anisotropic element having a negative refractive index anisotropy disposed between the first optically anisotropic element and the liquid crystal cell. Liquid crystal molecule in the liquid crystal cell is homogeneously aligned and have a pretilt angle of 0.5° or less in non-electric-field state. At least one of the first optically anisotropic element and the second optically anisotropic element has a ratio R450/R550 of 1.1 or more, where R550 is a retardation at a wavelength of 550 nm and R450 is a retardation at a wavelength of 450 nm.

Abstract translation: 液晶面板包括液晶单元，液晶单元一侧的第一偏振器，液晶单元另一侧的第二偏振器，具有正折射率各向异性的第一光学各向异性元件，设置在液体 晶体单元和第一偏振器，以及设置在第一光学各向异性元件和液晶单元之间的具有负折射率各向异性的第二光学各向异性元件。 液晶单元中的液晶分子是均匀排列的，并且在非电场状态下具有0.5°或更小的预倾角。 第一光学各向异性元件和第二光学各向异性元件中的至少一个的比率R450 / R550为1.1以上，其中R550是波长为550nm的延迟，R450是波长450nm的延迟。

公开(公告)号：US20140327963A1

公开(公告)日：2014-11-06

申请号：US14362462

申请日：2013-07-24

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Takashi Shimizu ,  Nao Murakami ,  Kazuki Uwada ,  Tadashi Kojima

IPC: G02B5/30 ,  B29D11/00

CPC classification number: G02B5/3083 ,  B29C55/08 ,  B29D11/00634 ,  B29D11/00951 ,  B29K2029/14 ,  B29K2067/003 ,  B29K2069/00

Abstract: The present invention provides a method of producing a retardation film excellent in stretchability and capable of achieving high alignment property. The method of producing a retardation film of the present invention is the method in which a lengthy resin film is stretched in a widthwise direction thereof while being conveyed in a lengthwise direction thereof to provide a retardation film satisfying a relationship of 0.70

Abstract translation: 本发明提供一种拉伸性优异且能够得到高取向性的延迟膜的制造方法。 本发明的延迟膜的制造方法是长度方向的树脂膜沿长度方向被拉伸而延伸的方法，以提供满足关系式为0.70

公开(公告)号：US10914881B2

公开(公告)日：2021-02-09

申请号：US16086390

申请日：2017-02-08

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Hironori Yaginuma

IPC: G02B5/30 ,  B32B7/02 ,  G02B1/14 ,  H01L51/52

Abstract: There is provided a polarizing plate with optical compensation layers having the following features: the polarizing plate is excellent in antireflection characteristic in an oblique direction while maintaining an excellent antireflection characteristic in a front direction; the polarizing plate can achieve such excellent antireflection characteristics over a wide wavelength band; and the polarizing plate has a neutral hue in the oblique direction. A polarizing plate with optical compensation layers according to the present invention is used for an organic EL panel. The polarizing plate with optical compensation layers includes: a polarizer; a first optical compensation layer; a second optical compensation layer; a third optical compensation layer; and a fourth optical compensation layer. Each of the first optical compensation layer, the second optical compensation layer, the third optical compensation layer, and the fourth optical compensation layer shows a refractive index characteristic of nx>nz>ny.

公开(公告)号：US20190103589A1

公开(公告)日：2019-04-04

申请号：US16083173

申请日：2017-03-06

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Hironori Yaginuma

IPC: H01L51/52 ,  H01L51/50 ,  G02B5/30

Abstract: There is provided a polarizing plate with optical compensation layers that is excellent in antireflection characteristic: in an oblique direction while maintaining an excellent antireflection characteristic in a front direction, and that has a neutral hue in the oblique direction. A polarizing plate with optical compensation layers according to the present invention is used for an organic EL panel The polarizing plate with optical compensation layers according to an embodiment of the present invention includes in the following order: a polarizer; a first optical compensation layer; and a second optical compensation layer. The first optical compensation layer shows a refractive index characteristic of nx>nz>ny and has an Re (550) of from 230 nm to 310 nm. The second optical compensation layer shows a refractive index characteristic of nx>nz>ny and satisfies a relationship of Re (450)

公开(公告)号：US20190101677A1

公开(公告)日：2019-04-04

申请号：US16086390

申请日：2017-02-08

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Hironori Yaginuma

IPC: G02B5/30 ,  B32B7/02 ,  H01L51/52

Abstract: There is provided a polarizing plate with optical compensation layers having the following features: the polarizing plate is excellent in antireflection characteristic in an oblique direction while maintaining an excellent antireflection characteristic in a front direction; the polarizing plate can achieve such excellent antireflection characteristics over a wide wavelength band; and the polarizing plate has a neutral hue in the oblique direction. A polarizing plate with optical compensation layers according to the present invention is used for an organic EL panel. The polarizing plate with optical compensation layers includes: a polarizer; a first optical compensation layer; a second optical compensation layer; a third optical compensation layer; and a fourth optical compensation layer. Each of the first optical compensation layer, the second optical compensation layer, the third optical compensation layer, and the fourth optical compensation layer shows a refractive index characteristic of nx>nz>ny.

公开(公告)号：US20160274400A1

公开(公告)日：2016-09-22

申请号：US15069132

申请日：2016-03-14

Applicant: NITTO DENKO CORPORATION

Inventor： Toshiyuki Iida ,  Nao Murakami

IPC: G02F1/13363 ,  G02F1/1337 ,  G02F1/1335

CPC classification number: G02F1/13363 ,  G02F1/133634 ,  G02F1/134363 ,  G02F2413/02 ,  G02F2413/06 ,  G02F2413/11

Abstract: The liquid crystal panel includes a liquid crystal cell, a first polarizer on one side of the liquid crystal cell, a second polarizer on the other side of the liquid crystal cell, a first optically anisotropic element disposed between the liquid crystal cell and the first polarizer, and a second optically anisotropic element disposed between the first optically anisotropic element and the liquid crystal cell. Absorption axes of the first and the second polarizers are perpendicular to each other. The first optically anisotropic element has a slow axis direction parallel to the absorption axis direction of the first polarizer. The second optically anisotropic element has a slow axis direction perpendicular to the absorption axis direction of the first polarizer. The first and the second optically anisotropic elements each have in-plane and thickness-direction retardation values within specific ranges, respectively.

Abstract translation: 液晶面板包括液晶单元，液晶单元一侧的第一偏振器，液晶单元另一侧的第二偏振器，设置在液晶单元与第一偏振器之间的第一光学各向异性元件 以及设置在第一光学各向异性元件和液晶单元之间的第二光学各向异性元件。 第一和第二偏振器的吸收轴彼此垂直。 第一光学各向异性元件具有平行于第一偏振器的吸收轴方向的慢轴方向。 第二光学各向异性元件具有垂直于第一偏振器的吸收轴方向的慢轴方向。 第一和第二光学各向异性元件分别具有特定范围内的面内和厚度方向的延迟值。