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Patent Searching and Data


Title:
COLORING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2021/145340
Kind Code:
A1
Abstract:
A coloring structure according to the present invention is provided with: an irregular layer having an irregular structure on a surface thereof, the irregular structure being provided with a plurality of irregular elements comprising a plurality of convex portions or a plurality of concave portions; and a dielectric layer which has a surface of a shape corresponding to the irregular structure and is composed of a single-layered thin film that emits reflected light enhanced through interference. In a planar view of the irregular structure taken in a direction along the thickness direction of the irregular layer, each of the width in the shorter-side direction and the width in the longer-side direction of the irregular elements is 10-100 µm. The dimension of each of the irregular elements along the thickness direction gradually increases from an end portion toward a central portion of the irregular element in the planar view. The ratio of a maximum value of the dimension of each of the irregular elements along the thickness direction to the width in the shorter-side direction is 0.1-1.0.

Inventors:
YOSHIMURA MAI (JP)
KAWASHITA MASASHI (JP)
TANI TAKAYUKI (JP)
FUJIWARA MITSUO (JP)
SUZUKI NAOYA (JP)
YASU YUKI (JP)
Application Number:
PCT/JP2021/000845
Publication Date:
July 22, 2021
Filing Date:
January 13, 2021
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD (JP)
International Classes:
B32B9/00; B32B3/30; B32B7/023; B32B15/04; G02B3/00; G02B5/02; G02B5/18
Domestic Patent References:
WO2016117452A12016-07-28
WO2019004229A12019-01-03
WO2015037577A12015-03-19
Foreign References:
JPH0763915A1995-03-10
JP2003500665A2003-01-07
US20190099978A12019-04-04
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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