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公开(公告)号：EP3862798A1
公开(公告)日：2021-08-11
申请号：EP19869347.5
申请日：2019-10-01
Applicant: Toppan Printing Co., Ltd.
Inventor： KAWASHITA, Masashi
Abstract: A color production structure includes an uneven structure layer and a multilayer film layer. The uneven structure layer has an uneven structure on a surface thereof, the uneven structure including a plurality of uneven elements. The multilayer film layer is a laminated film on the uneven structure and has a surface shaped to conform to the uneven structure, the multilayer film layer configured such that reflected light enhanced by interference emerges from the multilayer film layer. Each of the uneven elements has a longitudinal width and a lateral width in plan view along a thickness direction of the uneven structure layer, each of the longitudinal width and lateral width of the respective uneven elements having a value within a range from 10 µm to 100 µm inclusive. Each of the uneven elements has a dimension in the thickness direction of the uneven structure layer, the dimension of each uneven element continuously increasing from the peripheral edge to the center thereof in the plan view. A ratio of a maximum value of the dimension of each of the uneven elements to the lateral width thereof is set to be within a range from 0.1 to 1.0 inclusive.
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公开(公告)号：EP3647835A1
公开(公告)日：2020-05-06
申请号：EP18823749.9
申请日：2018-06-26
Applicant: Toppan Printing Co., Ltd.
Inventor： FURUTA, Kaoru , MICHI, Hiroyuki , KAWASHITA, Masashi
Abstract: A color developing structure that exhibits good color development and ensures a desired transmittance while diffusing reflected light in multiple directions. A color developing structure (1) includes a concave-convex layer (10) in which a first surface (11) has a concave-convex structure, and a reflective layer (20) formed on the first surface (11) to extend along the concave-convex structure. A convex surface of the concave-convex structure has a first pattern composed of a plurality of strip portions in plan view. The strip portion has a width in a first direction and a length in a second direction perpendicular to the first direction. The width is smaller than the wavelength of the incident light, and a standard deviation of the lengths of the plurality of strip portions is larger than a standard deviation of the widths.
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Patent Agency Ranking3.发明公开
公开(公告)号：EP3570079A1
公开(公告)日：2019-11-20
申请号：EP18739439.0
申请日：2018-01-11
Applicant: Toppan Printing Co., Ltd.
Inventor： YOSHIMURA, Mai , SAKAI, Kyoko , ICHIHARA, Yoko , KAWASHITA, Masashi , MINAMIKAWA, Naoki
Abstract: A color developing structure comprises an uneven layer having an uneven structure on a surface thereof, a multilayer film layer positioned on the uneven structure and having a surface shape that follows the uneven structure, and a protective layer covering the surface of the multilayer film layer. Projections that constitute the uneven structure have a shape with one or more steps, a pattern constituted from projected images of the projections in a virtual plane on which the uneven structure is projected in the thickness direction of the uneven layer includes a pattern comprising a set of a plurality of rectangles in which a length along a second direction is equal to or greater than a length along a first direction, the length of the rectangles along the first direction is equal to or less than sub-wavelength, and in the plurality of rectangles, the standard deviation of the length along the second direction is greater than the standard deviation of the length along the first direction.
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公开(公告)号：EP3892458A1
公开(公告)日：2021-10-13
申请号：EP19893809.4
申请日：2019-11-08
Applicant: Toppan Printing Co., Ltd.
Inventor： YOSHIMURA, Mai , KAWASHITA, Masashi
Abstract: A display that can be produced by a simple process and has high designability is prepared. The display includes a plurality of display elements. The display elements are each composed of an uneven layer having an uneven structure and a multilayer film layer provided on the uneven structure. A pattern formed by convexities can be divided into shape elements each arranged in each of a plurality of virtual rectangles, when viewed from a direction facing the uneven layer, and each of the shape elements arranged in each of the virtual rectangles is inscribed in the rectangle in which the shape element is arranged. The plurality of virtual rectangles each have sides along a first direction and sides along a second direction orthogonal to the first direction, and a length of the side along the first direction is less than or equal to a sub wavelength. When an angle formed by an arrangement direction of the rectangles which specify a plurality of shape elements forming one convexity and sides along the first direction Dx of the plurality of rectangles is θ, the angle θ is constant within each of the display elements. In at least one display element, the angle θ is greater than 0° and less than 90°, or greater than 90° and less than 180°.
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公开(公告)号：EP3570078A1
公开(公告)日：2019-11-20
申请号：EP18738752.7
申请日：2018-01-11
Applicant: Toppan Printing Co., Ltd.
Inventor： KAWASHITA, Masashi
Abstract: A display includes a display element including a protrusion-recess layer having a surface provided with a protrusion-recess structure and a multilayer film layer disposed on the protrusion-recess structure and having a surface shape which follows the protrusion-recess structure. A pattern formed by the protrusion includes a pattern composed of a group of a plurality of shape elements when the protrusion-recess structure is viewed in a direction perpendicular to the surface of the protrusion-recess layer. Each of the shape elements has a length extending in one extending direction, which is larger than a length in a width direction perpendicular to the extending direction, and the length in the width direction is equal to or less than a sub-wavelength. The plurality of shape elements has a standard deviation of the length in the extending direction, which is larger than a standard deviation of the length in the width direction. Further, the plurality of display elements include a first display element and a second display element, and the extending direction of the first display element and the extending direction of the second display element are different from each other.
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6.发明公开
公开(公告)号：EP3477346A1
公开(公告)日：2019-05-01
申请号：EP17815529.7
申请日：2017-06-23
Applicant: Toppan Printing Co., Ltd.
Inventor： KAWASHITA, Masashi , HAKII, Hidemitsu
IPC: G02B5/18 , B32B3/30 , B32B15/08 , B42D25/328 , B42D25/373 , G02B5/20 , G02B5/28 , G09F19/12
Abstract: An optical device comprises a support having a reference plane, and a dielectric periodic structure including a plurality of periodic elements which are arranged, on the reference plane, in a two-dimensional lattice having a sub-wavelength spacing and are either projections projecting from the reference plane or recesses depressed from the reference plane. The optical device further includes a metal layer, which is positioned on a surface of the periodic structure including a region of the reference plane surrounding the individual periodic elements and the surfaces of the periodic elements and which has a shape that follows the surface profile of the periodic structure.
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公开(公告)号：EP3324222A1
公开(公告)日：2018-05-23
申请号：EP16824083.6
申请日：2016-07-13
Applicant: Toppan Printing Co., Ltd.
Inventor： KAWASHITA, Masashi , OOKI, Mai
CPC classification number: G02B5/1861 , B32B3/30 , B32B7/02 , B32B38/0012 , B32B2551/00 , G02B5/18 , G02B5/1852
Abstract: A color developing structure capable of achieving multi-hued color through a simple process, and a method of producing the same are provided. In the color developing structure formed on a surface of a base material: the color developing structure has a rectangular shape in plan view, and is formed of a concavo-convex structure having a plurality of convexities with different heights and a laminated film including a plurality of layers laminated on the concavo-convex structure; the plurality of layers adjoining in a lamination direction are made of materials that transmit light of the same wavelength band and have different refractive indices with respect to light of the wavelength band; and the plurality of layers have the same thickness.
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