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公开(公告)号：US10353246B2
公开(公告)日：2019-07-16
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 , 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°.
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公开(公告)号：US09869809B2
公开(公告)日：2018-01-16
申请号：US14643271
申请日：2015-03-10
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Keiji Kashima , Yasuki Suzuura , Hiroshi Yamamoto , Takashi Kuroda
IPC: G02F1/1335 , F21V8/00
CPC classification number: G02B6/0056 , G02B6/0053 , G02B6/0055
Abstract: Sufficiently sharp directivity can be secured with a simple configuration in a configuration that improves the efficiency of utilizing the light exiting from a primary light source using a reflective polarizing plate. A backlight unit (2) supplies light exiting from an exit surface of a light guide plate (12) to a liquid-crystal display panel (3) via a reflective polarizing plate (16) after correcting directivity of the exiting light using a prism sheet (14) having a downwardly convex shape. A ¼-wavelength plate (15) is provided between the prism sheet (14) and the reflective polarizing plate (16), between the prism sheet (14) and the light guide plate, or between the light guide plate and a reflective sheet disposed on a surface of the light guide plate opposite to the prism sheet (14).
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公开(公告)号：US09297933B2
公开(公告)日：2016-03-29
申请号：US13693693
申请日：2012-12-04
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Takashi Kuroda , Seiichi Isojima , Makoto Honda , Gen Furui , Junya Eguchi , Eiji Ooishi
CPC classification number: G02B1/11 , B32B2457/202 , G02B5/0226 , G02B5/0294 , G02B5/3083 , G09F13/04
Abstract: Provided is an antiglare film having a hard coat property, capable of highly suppressing generation of a rainbow interference pattern and interference fringes in display images, preventing white muddiness and scintillation of a display screen, while giving high contrast in a bright room and a dark room. The antiglare film includes an antiglare layer having an uneven form on its surface and formed on one face of a transparent substrate having an in-plane birefringence and a retardation of 3000 nm or higher. The antiglare layer contains silica fine particles, organic fine particles, and a binder resin. The silica particles include particles forming agglomerates to be contained coarsely and densely in the antiglare layer. The agglomerates are distributed densely around the organic fine particles, and some agglomerates adhere to surfaces of the organic particles and/or some silica particles are impregnated in the inside of the organic particles.
Abstract translation: 提供一种具有硬涂层性能的防眩膜，能够高度抑制彩虹干涉图案的产生和显示图像中的干涉条纹，防止显示屏幕的白色混浊和闪烁，同时在明亮的房间和暗室提供高对比度 。 防眩膜包括在其表面上具有凹凸形状的防眩层，并形成在具有面内双折射和3000nm以上的延迟的透明基板的一个面上。 防眩层含有二氧化硅微粒，有机微粒和粘结剂树脂。 二氧化硅颗粒包括形成聚集体的颗粒，其在防眩层中粗略且密集地包含。 附聚物密集地分布在有机细颗粒周围，并且一些附聚物附着到有机颗粒的表面和/或一些二氧化硅颗粒浸渍在有机颗粒的内部。
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公开(公告)号：US20130279155A1
公开(公告)日：2013-10-24
申请号：US13693693
申请日：2012-12-04
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Takashi Kuroda , Seiichi Isojima , Makoto Honda , Gen Furui , Junya Eguchi , Eiji Ooishi
CPC classification number: G02B1/11 , B32B2457/202 , G02B5/0226 , G02B5/0294 , G02B5/3083 , G09F13/04
Abstract: Provided is an antiglare film having a hard coat property, capable of highly suppressing generation of a rainbow interference pattern and interference fringes in display images, preventing white muddiness and scintillation of a display screen, while giving high contrast in a bright room and a dark room. The antiglare film includes an antiglare layer having an uneven form on its surface and formed on one face of a transparent substrate having an in-plane birefringence and a retardation of 3000 nm or higher. The antiglare layer contains silica fine particles, organic fine particles, and a binder resin. The silica particles include particles forming agglomerates to be contained coarsely and densely in the antiglare layer. The agglomerates are distributed densely around the organic fine particles, and some agglomerates adhere to surfaces of the organic particles and/or some silica particles are impregnated in the inside of the organic particles.
Abstract translation: 提供一种具有硬涂层性能的防眩膜，能够高度抑制彩虹干涉图案的产生和显示图像中的干涉条纹，防止显示屏幕的白色混浊和闪烁，同时在明亮的房间和暗室提供高对比度 。 防眩膜包括在其表面上具有凹凸形状的防眩层，并形成在具有面内双折射和3000nm以上的延迟的透明基板的一个面上。 防眩层含有二氧化硅微粒，有机微粒和粘结剂树脂。 二氧化硅颗粒包括形成聚集体的颗粒，其在防眩层中粗略且密集地包含。 附聚物密集地分布在有机细颗粒周围，并且一些附聚物附着到有机颗粒的表面和/或一些二氧化硅颗粒浸渍在有机颗粒的内部。
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公开(公告)号：US20130093982A1
公开(公告)日：2013-04-18
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
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。
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Patent Agency Ranking
公开(公告)号：US11971567B2
公开(公告)日：2024-04-30
申请号：US18249007
申请日：2021-10-21
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Shosei Kubota , Hikaru Hotta , Yoshiko Tanaka , Takashi Kuroda , Akinobu Ushiyama
CPC classification number: G02B5/305 , G02B1/111 , G02B1/14 , G02B5/3083
Abstract: Provided is an optical film that can eliminate rainbow unevenness when viewed with the naked eyes and provide favorable color tone uniformity when viewed at an oblique angle. This optical film has a low-refractive index layer on a plastic film, the plastic film has a slow axis that is an axis with the largest refractive index in a plane, and a fast axis that is an axis orthogonal to the slow axis in the plane of the plastic film, and the low-refractive index layer is located on the surface of the optical film. Linearly polarized light is incident, under predetermined conditions, from a surface on a side opposite to the low-refractive index layer of the optical film, and transmitted light of the linearly polarized light is used to measure the a* value and b* value of the L*a*b* color system at 11 measurement points with different angles. The measurements at the 11 measurement points are used to calculate a sum of square of a difference in a* between adjacent measurement points and square of a difference in b* between the adjacent measurement points. The sum was calculated for each of 10 adjacent points. The optical film has a ΣT, which indicates a total of the above sums, within a predetermined range.
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公开(公告)号：US11877473B2
公开(公告)日：2024-01-16
申请号：US16956347
申请日：2018-12-18
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Kenji Fujita , Takashi Kuroda
CPC classification number: H10K50/86 , G02B1/11 , G02B5/3033
Abstract: The present invention relates to an optical laminate capable of providing a display panel in which worsening of visibility owing to reflected colors is suppressed. Furthermore, the present invention provides a display panel including the aforementioned optical laminate; a display device including the foregoing optical laminate; and an antireflection layer, a circular polarizing plate, a retardation plate, and a polarizing plate, each of which is used for the aforementioned display panel.
The optical laminate includes a circular polarizing plate having a retardation plate and a polarizer, and an antireflection layer having a surface reflectance of 2% or less, wherein the antireflection layer is provided on the polarizer side of the circular polarizing plate; and L* of light incident from the antireflection layer side in the SCI mode is 20 or less, and a saturation is 20 or less.-
公开(公告)号：US10310153B2
公开(公告)日：2019-06-04
申请号：US14917189
申请日：2014-08-06
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Takashi Kuroda
IPC: G02B5/30 , G02F1/1335 , G02B27/28
Abstract: The present invention provides a polarizer excellent in transmittance even if it includes a light-transmitting substrate having no in-plane phase difference. The present invention relates to a polarizer configured to be disposed on a backlight source side in an image display device, the polarizer including at least a light-transmitting substrate having in-plane birefringence and a polarizing element layered in said order from the backlight source side, the light-transmitting substrate receiving incidence of polarized light, the light-transmitting substrate and the polarizing element being layered such that a fast axis of the light-transmitting substrate along a direction in which the substrate shows a smaller refractive index and a transmission axis of the polarizing element form an angle of 0°±30° or 90°±30°.
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公开(公告)号：US10048522B2
公开(公告)日：2018-08-14
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
CPC classification number: G02F1/133528 , B29C48/0018 , B29C48/08 , B29C48/154 , B29C48/21 , B29C48/30 , B29C48/305 , B29C48/91 , B29C48/914 , B29C48/92 , B29C2948/92152 , B29C2948/92247 , B29C2948/92447 , B29C2948/92647 , B29C2948/92742 , B29C2948/92942 , B29K2067/003 , B29K2995/0026 , B29K2995/0034 , B29L2007/008 , B29L2009/005 , B29L2011/0066 , B32B27/36 , G02B1/11 , G02B5/3033 , G02B5/3083 , G02B5/32 , G02F1/1333 , G02F1/133502 , G02F1/13363 , G02F2001/133562 , G02F2201/38 , G02F2202/40 , G02F2413/08
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.
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20.发明授权公开(公告)号：US12292373B2
公开(公告)日：2025-05-06
申请号：US18537293
申请日：2023-12-12
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Yoshiko Tanaka , Shosei Kubota , Takashi Kuroda , Akinobu Ushiyama
IPC: G01N17/00 , G02F1/1335
Abstract: The present disclosure addresses the problem of providing an optical plastic film such that rainbow unevenness when viewed with naked eyes and blackout when viewed with polarized sunglasses can be suppressed without any axis alignment or increase in the in-plane phase difference. Disclosed is an optical plastic film satisfying the following conditions 1 and 2: when a large sample with a size of 200 mm×300 mm is cut out from a plastic film, the large sample is divided into 30 small samples of 40 mm×50 mm, a region of 30 mm×40 mm obtained by excluding 5 mm from each edge of each small sample is subdivided into 47,000 or more regions, and an in-plane phase difference of each subdivided region is then measured, a percentage of small samples in which an average of the in-plane phase difference of each region measured is 50 nm or more and 1,200 nm or less, among the 30 small samples is 50% or more; and when the 30 small samples are processed in the same manner as in condition 1 and an angle of slow axis of each subdivided region of each small sample is measured, a percentage of small samples in which a standard deviation a calculated from the angle of slow axis of each region measured is 0.8 degrees or more, among the 30 small samples is 50% or more.
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