Display member, transfer foil, and article with display member

Patent metadata

Field	Value
Publication number	US-9720146-B2
Application number	US-201414287807-A
Country	US
Kind code	B2
Filing date	May 27, 2014
Priority date	Dec 7, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A display member according to this invention includes a plurality of pixels. At least one of the plurality of pixels includes a relief structure formation layer including a first region configured to display a predetermined color on a condition, and a second region different from the first region, a first layer made of a first material, and covering at least the first region, and a second layer made of a second material different from the first material, and covering the first layer. The display member displays an image based on a distribution of the first region on the condition that the display member is observed in the oblique direction, and displays an image based on a distribution of the second region on a condition that the display member is observed with transmitted light.

First claim

What is claimed is:

1. A display member comprising:
a plurality of pixels, each of the plurality of pixels comprising:
a relief structure formation layer including a first region formed by a plurality of recesses or projections and including at least one sub region configured to display a predetermined color on a condition that the sub region is observed in an oblique direction intersecting a normal of a major surface of the display member, and a second region different from the first region;
a first layer which is made of a first material having a refractive index different from that of a material of the relief structure formation layer, and covers at least the first region, and in which a portion corresponding to the first region has a surface shape corresponding to a surface shape of the first region, and a ratio of an amount of the first material in a position of the second region to an apparent area of the second region is zero or lower than a ratio of an amount of the first material in a position of the first region to an apparent area of the first region; and
a second layer which is made of a second material different from the first material, and covers the first layer, and in which a ratio of an amount of the second material in the position of the second region to the apparent area of the second region is zero or lower than a ratio of an amount of the second material in the position of the first region to the apparent area of the first region,

wherein each of the plurality of pixels displays an arbitrary color in accordance with the respective at least one sub region, and
for each of the plurality of pixels, the display member displays a positive image based on a distribution of the first region on the condition that the display member is observed in the oblique direction, and displays a negative image based on a distribution of the second region on a condition that the display member is observed with transmitted light.

2. The display member according to claim 1 , characterized in that the second region is formed by a plurality of recesses or projections having a higher ratio of a surface area to the apparent area of the second region.

3. The display member according to claim 2 , characterized in that the second region is formed by a plurality of recesses or projections two-dimensionally arranged at a center-to-center distance of not more than 500 nm, and each having a forward tapered shape.

4. A transfer foil comprising the display member according to claim 3 , and a support layer supporting the display member such that the display member is peelable.

5. An article with a display member, comprising the display member according to claim 3 , and an article supporting the display member.

6. A transfer foil comprising the display member according to claim 2 , and a support layer supporting the display member such that the display member is peelable.

7. An article with a display member, comprising the display member according to claim 2 , and an article supporting the display member.

8. The display member according to claim 1 , characterized in that the first region includes a first sub region configured to display red on a condition that the first sub region is observed in an oblique direction intersecting a normal of a major surface of the display member, a second sub region configured to display green under the condition, and a third sub region configured to display blue under the condition.

9. A transfer foil comprising the display member according to claim 1 , and a support layer supporting the display member such that the display member is peelable.

10. An article with a display member, comprising the display member according to claim 1 , and an article supporting the display member.

11. A display member including comprising:
a plurality of pixels, each of the plurality of pixels comprising:
a relief structure formation layer including a first region formed by a plurality of recesses or projections and including at least one sub region configured to display a predetermined color on a condition that the sub region is observed in an oblique direction intersecting a normal of a major surface of the display member, a flat second region, and a third region different from the first region and the second region;
a first layer which is made of a first material having a refractive index different from that of a material of the relief structure formation layer, and covers at least the first region and the second region, and in which portions corresponding to the first region and the second region have surface shapes corresponding to surface shapes of the first region and the second region, and a ratio of an amount of the first material in a position of the third region to an apparent area of the third region is zero or lower than a ratio of an amount of the first material in positions of the first region and the second region to an apparent area of the first region and the second region; and
a second layer which is made of a second material different from the first material, and covers the first layer, and in which a ratio of an amount of the second material in the position of the third region to the apparent area of the third region is zero or lower than a ratio of an amount of the second material in the position of the first region to the apparent area of the first region,

wherein each of the plurality of pixels displays an arbitrary color in accordance with the respective at least one sub region, and
for each of the plurality of pixels, the display member displays a positive image based on a distribution of the first region on the condition that the display member is observed in the oblique direction, and displays a watermark picture based on a distribution of the third region on a condition that the display member is observed with transmitted light.

12. The display member according to claim 11 , characterized in that the third region is formed by a plurality of recesses or projections having a higher ratio of a surface area to the apparent area of the third region.

13. The display member according to claim 12 , characterized in that the third region is formed by a plurality of recesses or projections two-dimensionally arranged at a center-to-center distance of not more than 500 nm, and each having a forward tapered shape.

14. A transfer foil comprising the display member according to claim 12 , and a support layer supporting the display member such that the display member is peelable.

15. An article with a display member, comprising the display member according to claim 12 , and an article supporting the display member.

16. The display member according to claim 11 , characterized in that a center-to-center distance of the plurality of recesses or projections in the first region is 500 to 1,000 nm.

17. The display member according to claim 16 , characterized in that the first region includes a first sub region configured to display red on a condition that the first sub region is observed in an oblique direction intersecting a normal of a major surface of the display member, a second sub region configured to display green under the condition, and a third sub region configured to display blue under the condition.

18. A transfer foil comprising the display member according to claim 11 , and a support layer supporting the display member such that the display member is peelable.

19. An article with a display member, comprising the display member according to claim 11 , and an article supporting the display member.

Assignees

• Toppan Printing Co Ltd

Inventors

• Kubo Akira
• Sawamura Chikara
• Yashiki Kazuhiro

Classifications

• B42D25/351

  Translucent or partly translucent parts, e.g. windows · CPC title

• B42D25/445

  using chemical means, e.g. etching · CPC title

• B42D25/324

  Reliefs · CPC title

• B42D25/30

  Identification or security features, e.g. for preventing forgery · 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