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1.发明授权公开(公告)号：US11953710B2
公开(公告)日：2024-04-09
申请号：US17032483
申请日：2020-09-25
发明人： Satoshi Emori , Takashi Kuroda
IPC分类号： G02B5/30 , C09K19/34 , C09K19/38 , C09K19/54 , C09K19/58 , H10K50/11 , H10K50/84 , H10K50/858 , H10K50/86 , H10K85/00 , G02F1/13363 , H01L25/075
CPC分类号： G02B5/3083 , C09K19/3477 , C09K19/3491 , C09K19/3857 , C09K19/3861 , C09K19/544 , C09K19/586 , G02B5/3016 , H10K50/11 , H10K50/84 , H10K50/858 , H10K50/86 , H10K85/731 , G02F1/133633 , G02F1/133638 , H01L25/075
摘要： The present invention provides a display panel in which deterioration of color tone may be suppressed regardless of the reflectance of the display element.
A display panel including a display element (A), a retardation layer (B) positioned upon the light emission surface side of the display element, and a polarizer (C) positioned upon the light emission surface side of the retardation layer, in which the retardation layer (B) has a λ/4 retardation layer (B1), and the in-plane retardation of the λ/4 retardation layer (B1) satisfies the following Condition 1:
The spectral reflectance of the display element is measured by an SCI method, the average reflectance at wavelengths over the range of 400 nm or more and less than 550 nm is obtained as R1, the average reflectance at wavelengths over the range of 550 nm or more and less than 700 nm is obtained as R2, and when the value of R1/R2 is calculated and obtained as x, the in-plane retardation of the λ/4 retardation layer falls within the range of −4.6002x+119.24 nm or more and −4.6002x+129.24 nm or less.-
公开(公告)号：US10890777B2
公开(公告)日：2021-01-12
申请号：US16108554
申请日：2018-08-22
发明人： Takashi Kuroda , Satoru Hamada , Keiji Kashima
摘要： Disclosed is a selectively reflective member which can uniformly reflect only a desired wavelength with high efficiency even in a large area and, at the same time, is highly cost effective. Specifically, there is provided an electromagnetic wave reflecting member that reflects electromagnetic waves with a specific wavelength, the electromagnetic wave reflecting member comprising a first selectively reflective layer that reflects only a clockwise or counterclockwise circularly polarized light component with wavelength λ in incident electromagnetic waves, a phase difference layer, and a second selectively reflective layer that reflects only a clockwise or counterclockwise circularly polarized light component with wavelength λ, provided in that order, the phase difference layer having a retardation satisfying the following equation: Re={(2n+1)/2±0.2}×λ wherein Re represents average retardation; λ represents wavelength; and n is an integer of 1 or more.
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公开(公告)号：US10761366B2
公开(公告)日：2020-09-01
申请号：US16518630
申请日：2019-07-22
发明人： Takashi Kuroda , Makoto Honda
IPC分类号： G02F1/1335 , G02B5/30 , G02F1/13363 , G02F1/1333
摘要： 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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公开(公告)号：US10668690B2
公开(公告)日：2020-06-02
申请号：US16312777
申请日：2017-06-30
发明人： Seiichi Isojima , Takashi Kuroda
IPC分类号： B32B7/023 , B32B27/34 , B32B27/36 , G02B5/30 , G09F9/30 , H01L27/32 , H01L51/50 , H05B33/02 , B32B7/02 , B32B27/28 , B32B27/30 , B32B27/32 , B32B27/08 , H01L51/52 , G02B1/04 , G02F1/13363 , G02F1/1333 , G02F1/1335
摘要： The present invention provides: an optical laminate comprising at least two films, the optical laminate comprising at least a film A satisfying a given condition (1) and a film C satisfying a given condition (2), wherein a retardation value Re(0) observed in a direction of an axis perpendicular to a plane of the optical laminate is 4,000 to 30,000 nm, and a retardation value Re(40) observed in a direction of an axis tilted from the axis perpendicular to the plane of the optical laminate toward a slow axis by 40 degrees in a plane lying perpendicular to the plane of the optical laminate and extending along the slow axis is 4,000 to 25,000 nm, the slow axis being an axis along which refractive index is highest in a plane of the film A; and a display device comprising the optical laminate.
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公开(公告)号：US09995953B2
公开(公告)日：2018-06-12
申请号：US14235288
申请日：2013-05-21
发明人： Takashi Kuroda , Makoto Honda
IPC分类号： G02F1/1335 , G02F1/13363 , G02B5/30 , G02F1/1333 , 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分类号： G02F1/1333 , B29C47/0021 , B29C47/0057 , B29C47/025 , B29C47/065 , B29C47/14 , B29C47/8805 , B29C47/8845 , B29C47/92 , B29C2947/92152 , B29C2947/92247 , B29C2947/92447 , B29C2947/92647 , B29C2947/92742 , B29C2947/92942 , B29K2067/003 , B29K2995/0026 , B29K2995/0034 , B29L2007/008 , B29L2009/005 , B29L2011/0066 , B32B7/02 , B32B27/36 , G02B1/11 , G02B5/3033 , G02B5/3083 , G02B5/32 , G02F1/133502 , G02F1/133528 , G02F1/13363 , G02F2001/133562 , G02F2201/38 , G02F2202/40 , G02F2413/08 , Y10T29/49778
摘要： 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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公开(公告)号：US20150260903A1
公开(公告)日：2015-09-17
申请号：US14643271
申请日：2015-03-10
IPC分类号： F21V8/00 , G02B5/04 , G02F1/1335 , G02B5/30 , G02F1/13363 , G02F1/1337
CPC分类号： G02B6/0056 , G02B6/0053 , G02B6/0055
摘要： 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).
摘要翻译： 可以以简单的结构确保足够尖锐的方向性，从而提高使用反射偏振片从初级光源出射的光的效率。 背光单元（2）在使用棱镜片校正出射光的方向性之后，经由反射偏振板（16）将从导光板（12）的出射表面射出的光提供给液晶显示面板（3） （14）具有向下凸的形状。 在棱镜片（14）和反射偏光板（16）之间，在棱镜片（14）和导光板之间，或者在导光板和设置的反射片之间设置有1/4波片（15） 在所述导光板的与所述棱镜片（14）相反的表面上。
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公开(公告)号：US11726247B2
公开(公告)日：2023-08-15
申请号：US17024146
申请日：2020-09-17
发明人： Takashi Kuroda , Yasuhiro Koike
IPC分类号： G02B5/30 , G09F9/00 , H05B33/02 , G02F1/13363 , H10K50/00 , G02F1/1335
CPC分类号： G02B5/3083 , G02B5/30 , G02F1/13363 , G02F1/133634 , G09F9/00 , H05B33/02 , H10K50/00 , G02F1/133562 , G02F1/133637 , G02F2202/40 , G02F2413/05
摘要： There is provided a display device exhibiting a good color reproducibility, even when observed through polarized sunglasses. A display device comprises a polarizer a and an optical film X on a surface on a light emitting surface side of a 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.
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公开(公告)号：US11204524B2
公开(公告)日：2021-12-21
申请号：US16068044
申请日：2017-01-05
发明人： Yasuhiro Koike , Takashi Kuroda , Kana Yamamoto
IPC分类号： G02F1/13363 , G02B5/30 , G02F1/1335
摘要： The present invention aims to provide an image display device including an optical film having a thickness suitable for practical use without including any special inorganic material, wherein the image display device has high color rendering properties and is capable of minimizing the occurrence of blackout and interference colors (rainbow unevenness) even when the image display device includes light sources that emit light having a narrow emission spectrum. The present invention provides an image display device including an optical film having an in-plane birefringence and a polarizer in this order, wherein the optical film and the polarizer are disposed to form an angle of about 45° between a slow axis of the optical film and an absorption axis of the polarizer, the optical film has a retardation of 3000 nm or more, and light incident on the optical film provides at least 50% coverage of ITU-R BT.2020.
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公开(公告)号：US10359666B2
公开(公告)日：2019-07-23
申请号：US16258241
申请日：2019-01-25
发明人： Takashi Kuroda , Makoto Honda
IPC分类号： G02B1/11 , G02B5/30 , G02B5/32 , B29K67/00 , B29L11/00 , B32B27/36 , G02F1/1333 , G02F1/1335 , G02F1/13363
摘要： 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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公开(公告)号：US10353246B2
公开(公告)日：2019-07-16
申请号：US14990106
申请日：2016-01-07
IPC分类号： G02F1/13363 , G02F1/1335 , G02B1/10 , G02B5/30
摘要： 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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