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Patent Searching and Data


Title:
COLOR DISPLAY BODY, AUTHENTICATION MEDIUM AND AUTHENTICITY DETERMINATION METHOD OF COLOR DISPLAY BODY
Document Type and Number:
WIPO Patent Application WO/2021/060543
Kind Code:
A1
Abstract:
A forming mold includes a first wavy surface on part or all of a surface contacting a deposited film. The period of waves on a wavy surface is within the range 250-500 nm. The deposited film follows the surface of the forming mold. The first wavy surface includes multiple rib surfaces, multiple grooves surfaces, and multiple taper surfaces that connect the rib surfaces and the groove surfaces. The deposited film includes a peak zone, a valley zone and a transition zone. The thickness and/or volume density of one of the peak zone, the valley zone and the transition zone is different from the thickness and/or the volume density of another of the peak zone, the valley zone and the transition zone, or, one of the peak zone, the valley zone and the transition zone contains portions having mutually different thicknesses and/or volume densities.

Inventors:
SUGIHARA KEITARO (JP)
KAGOTANI AKIHITO (JP)
Application Number:
PCT/JP2020/036474
Publication Date:
April 01, 2021
Filing Date:
September 25, 2020
Export Citation:
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Assignee:
TOPPAN PRINTING CO LTD (JP)
International Classes:
G02B5/18; B42D25/328
Domestic Patent References:
WO2008143087A12008-11-27
Foreign References:
US20150219807A12015-08-06
JP2018063305A2018-04-19
JPS58500916A1983-06-02
US20120162771A12012-06-28
JP2018013679A2018-01-25
Attorney, Agent or Firm:
ONDA Makoto et al. (JP)
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