Display and labeled article

Patent metadata

Field	Value
Publication number	US-9292988-B2
Application number	US-201213477739-A
Country	US
Kind code	B2
Filing date	May 22, 2012
Priority date	Nov 27, 2009
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A display includes a first optical effect layer including a first interface part, the first interface part being provided with recesses or protrusions arranged two-dimensionally at the minimum center-to-center distance of 200 nm to 500 nm, each of the recesses or protrusions having a forward-tapered shape, a reflective material layer covering at least a part of the first interface part, and a second optical effect layer including, at a position of a first portion of the first interface part that is covered with the reflective material layer, a portion that faces the reflective material layer with the first optical effect layer interposed therebetween or faces the first optical effect layer with the reflective material layer interposed therebetween, the second optical effect layer containing at least one of a cholesteric liquid crystal, a pearl pigment and a multilayer interference film.

First claim

What is claimed is:

1. A display comprising:
a first optical effect layer including a first interface part, the first interface part being provided with recesses or protrusions arranged two-dimensionally at the minimum center-to-center distance in a range of 200 nm to 500 nm, each of the recesses or protrusions having a forward-tapered shape;
a reflective material layer covering at least a part of the first interface part; and
a second optical effect layer including, at a position of a first portion of the first interface part that is covered with the reflective material layer, a portion that faces the reflective material layer with the first optical effect layer interposed therebetween or faces the first optical effect layer with the reflective material layer interposed therebetween, the second optical effect layer containing at least one of a cholesteric liquid crystal, a pearl pigment and a multilayer interference film,
wherein the first optical effect layer further includes a second interface part that is adjacent to the first interface part and provided with grooves disposed one-dimensionally at the minimum center-to-center distance larger than the minimum center-to-center distance of the recesses or protrusions, and a third interface part as a flat surface that is adjacent to the first interface part, wherein the reflective material layer further covers a part of the third interface part,
wherein a first display part of the display that corresponds to the first interface part allows the observer to recognize a second optical effect offered by the second optical effect layer when observed at an angle capable of observing regularly reflected light,
wherein when illumination light is incident at an angle within a negative angular range and the display is observed at an angle within the negative angular range, the first display part allows the observer to recognize the diffracted light from the first interface part, and wherein the display further comprises a dark light-absorbing layer facing the second optical effect layer with the first optical effect layer interposed therebetween at a portion of the third interface part that is not covered with the reflective material layer.

2. The display according to claim 1 , wherein the reflective material layer covers only a part of the first interface part, and the second optical effect layer further includes, at a position of a second portion of the first interface part that is not covered with the reflective material layer, a portion that faces the first optical effect layer.

3. The display according to claim 2 , wherein the first optical effect layer has light-transmitting properties, and the light-absorbing layer is also present at a position of the second portion of the first interface part.

4. The display according to claim 3 , wherein the light-absorbing layer contains a magnetic substance.

5. The display according to claim 1 , wherein the first interface part, the second interface part, and the third interface part are adjacent to each other, the reflective material layer overlies a first boundary between the first interface part and the second interface part and a second boundary between the first interface part and the third interface part, and the second optical material layer is provided such that an orthogonal projection of the second optical material layer on a main surface of the first optical effect layer that includes the first interface portion, the second interface portion, and the third interface portion overlies the first and second boundaries.

6. A labeled article comprising:
a substrate; and
the display according to claim 1 supported by the substrate.

7. The labeled article according to claim 6 , wherein the substrate is a paper and the display is buried in the paper.

8. The labeled article according to claim 7 , wherein the display is in a form of a thread.

Assignees

• Watanabe Manabu
• Nagayoshi Mihoko
• Uehara Takashi
• Ochiai Hideki
• Toppan Printing Co Ltd

Inventors

• Watanabe Manabu
• Nagayoshi Mihoko
• Uehara Takashi
• Ochiai Hideki

Classifications

• D21H21/40

  Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper (watermarking B41M3/10, D21F1/44; security printing B41M3/14; securities or banknotes characterised by colour effects B42D25/29, B42D25/30; testing paper currency or valuable papers for genuineness G07D7/00) · CPC title

• B42D25/355

  Security threads · CPC title

• B42D25/00

  Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14) · CPC title

• B42D2035/20

  Operations & Transport · mapped topic

• B42D2033/16

  Operations & Transport · mapped topic