公开(公告)号：US10921648B2

公开(公告)日：2021-02-16

申请号：US15944238

申请日：2018-04-03

Applicant: Dai Nippon Printing Co., Ltd.

Inventor： Takashi Kuroda ,  Seiichi Isojima ,  Norinaga Nakamura

IPC: G02F1/13363 ,  G02F1/1335 ,  G02B1/10 ,  G02B5/30

Abstract: The present invention aims to provide a liquid crystal display device highly suppressing occurrence of rainbow interference pattern in displayed images. The present invention is a liquid crystal display device including: a back light source, a liquid crystal cell, a color filter, a polarizer, and a polarizer protective film arranged in the stated order, wherein the polarizer protective film has a retardation of not less than 6000 nm, and a difference (nx−ny) of not less than 0.05 between a refractive index (nx) in a slow axis direction that is a highest refractive index direction and a refractive index (ny) in a fast axis direction that is orthogonal to the slow axis direction, and an absorption axis of the polarizer and the slow axis of the polarizer protective film are arranged to form an angle within a range of 0°±30° or 90°±30°.

公开(公告)号：US10677975B2

公开(公告)日：2020-06-09

申请号：US16080260

申请日：2017-02-22

Applicant: DAI NIPPON PRINTING CO., LTD. ,  Yasuhiro Koike

Inventor： Takashi Kuroda ,  Yasuhiro Koike

IPC: G02F1/1335 ,  G02B5/30 ,  H01L51/50 ,  G02F1/13363

Abstract: There is provided a display device exhibiting a good color reproducibility, even when observed through polarized sunglasses. A display device comprises a display element, and a polarizer a and an optical film X on a surface on a light emitting surface side of the display element, wherein L1, which is the light incident vertically on the optical film X, among light incident on the optical film X from the display element side, satisfies a specific condition, and L2, which is the light emitting vertically from the light emitting surface side of the optical film X, and passing through a polarizer b having the absorption axis parallel to the absorption axis of the polarizer a, satisfies a specific condition.

公开(公告)号：US10018860B2

公开(公告)日：2018-07-10

申请号：US14200837

申请日：2014-03-07

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Takashi Kuroda ,  Makoto Honda

IPC: G02F1/1333 ,  G02F1/13363 ,  G02F1/1335 ,  G02B5/30 ,  B32B7/02 ,  G02B1/11 ,  G02B5/32 ,  B29C47/00 ,  B29C47/88 ,  B29C47/92 ,  B32B27/36 ,  B29L9/00 ,  B29L11/00 ,  B29C47/02 ,  B29C47/06 ,  B29C47/14 ,  B29K67/00 ,  B29L7/00

Abstract: The present invention provides a method for improving visibility of an image display device which is capable of providing an image display device excellent in anti-reflection properties and bright-field contrast even using an optical layered body including a light-transmitting substrate having in-plane birefringence, such as a polyester film. The method of the present invention is a method for improving visibility of an image display device that has an optical layered body including a light-transmitting substrate having in-plane birefringence and an optical functional layer disposed on one surface of the substrate. The method includes the step of disposing the optical layered body such that the slow axis showing a greater refractive index of the light-transmitting substrate is in parallel with the vertical direction of a display screen of the image display device.

公开(公告)号：US20160116802A1

公开(公告)日：2016-04-28

申请号：US14990106

申请日：2016-01-07

Applicant: Dai Nippon Printing Co., Ltd.

Inventor： Takashi Kuroda ,  Seiichi Isojima ,  Norinaga Nakamura

IPC: G02F1/13363 ,  G02B5/30 ,  G02B1/10 ,  G02F1/1335

CPC classification number: G02F1/133634 ,  G02B1/10 ,  G02B5/3083 ,  G02F1/133528 ,  G02F2202/40 ,  G02F2413/12 ,  Y10T428/105

Abstract: The present invention aims to provide a liquid crystal display device highly suppressing occurrence of rainbow interference pattern in displayed images. The present invention is a liquid crystal display device including: a back light source, a liquid crystal cell, a color filter, a polarizer, and a polarizer protective film arranged in the stated order, wherein the polarizer protective film has a retardation of not less than 6000 nm, and a difference (nx−ny) of not less than 0.05 between a refractive index (nx) in a slow axis direction that is a highest refractive index direction and a refractive index (ny) in a fast axis direction that is orthogonal to the slow axis direction, and an absorption axis of the polarizer and the slow axis of the polarizer protective film are arranged to form an angle within a range of 0°±30° or 90°±30°.

Abstract translation: 本发明旨在提供一种高度抑制显示图像中的彩虹干涉图案的发生的液晶显示装置。 本发明是一种液晶显示装置，其特征在于，具有：按照所述顺序配置的背光源，液晶单元，滤色器，偏振片，偏振片保护膜，其中，所述偏振片保护膜的延迟小于等于 在高折射率方向的慢轴方向的折射率（nx）与快轴方向的折射率（ny）之间的差为（0.05以上）的差（nx-ny）为0.05以上 垂直于慢轴方向，并且偏振器的吸收轴和偏振器保护膜的慢轴被布置成形成在0°±30°或90°±30°的范围内的角度。

公开(公告)号：US09261728B2

公开(公告)日：2016-02-16

申请号：US13630511

申请日：2012-09-28

Applicant: Dai Nippon Printing Co., Ltd.

Inventor： Takashi Kuroda ,  Seiichi Isojima ,  Norinaga Nakamura

IPC: G02F1/1335 ,  G02F1/13363

CPC classification number: G02F1/133634 ,  G02B1/10 ,  G02B5/3083 ,  G02F1/133528 ,  G02F2202/40 ,  G02F2413/12

Abstract: The present invention aims to provide a liquid crystal display device highly suppressing occurrence of rainbow interference pattern in displayed images. The present invention is a liquid crystal display device including: a back light source, a liquid crystal cell, a color filter, a polarizer, and a polarizer protective film arranged in the stated order, wherein the polarizer protective film has a retardation of not less than 6000 nm, and a difference (nx−ny) of not less than 0.05 between a refractive index (nx) in a slow axis direction that is a highest refractive index direction and a refractive index (ny) in a fast axis direction that is orthogonal to the slow axis direction, and an absorption axis of the polarizer and the slow axis of the polarizer protective film are arranged to form an angle within a range of 0°±30° or 90°±30°.

Abstract translation: 本发明旨在提供一种高度抑制显示图像中的彩虹干涉图案的发生的液晶显示装置。 本发明是一种液晶显示装置，其特征在于，具有：按照所述顺序配置的背光源，液晶单元，滤色器，偏振片，偏振片保护膜，其中，所述偏振片保护膜的延迟小于等于 在高折射率方向的慢轴方向的折射率（nx）与快轴方向的折射率（ny）之间的差为（0.05以上）的差（nx-ny）为0.05以上 垂直于慢轴方向，并且偏振器的吸收轴和偏振器保护膜的慢轴被布置成形成在0°±30°或90°±30°的范围内的角度。