JPH05113763A - Bright stereo graphic display sheet - Google Patents

Abstract

PURPOSE:To provide a bright stereographic display sheet at a reduced cost by gravure technology in which, only when it is viewed from a specified visual angle, a hidden shadow for estimated stereographic display looks darker than a background around it and, as result, the estimated stereographic display looks as if it is embossed. CONSTITUTION:A bright stereographic display sheet comprises a base layer, a light reflection layer, a transparent uneven print layer with uneven print surface, and a transparent protective layer laminated in that order from the bottom side. The uneven lower surface of the uneven print layer comprises a background part 1 and a hidden shadow part 2. The hidden shadow part 2 is formed with uneven patterns of parallel straight lines faced in a fixed direction. On the other hand, the background part 1 around the hidden shadow part 2 is formed with even surfaces. When the sheet is viewed from a specified visual angle, the background part 1 looks darker than the hidden shadow part 2 and the estimated stereographic display bodies A, B, and C looks like as if they are embossed, because the light reflection conditions of them are different from each other. At the other visual angles, however, the background part 1 and the hidden shadow part 2 are mixed with each other, and they cannot be recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glittering three-dimensional display sheet, and more particularly, to a shadow formed when a supposed three-dimensional display body such as a character or a pattern is illuminated with light from a certain direction. The hidden shadow part is formed on a predetermined part of the sheet, and the hidden shadow part can be clearly seen only when viewed from a specific direction, that is, the assumed stereoscopic display body looks three-dimensionally raised, while the other The glittering three-dimensional display sheet is configured so that the hidden shadow portion is integrated with the background when viewed from the direction and the hidden shadow portion is difficult to identify, that is, the assumed stereoscopic display body is invisible.

[0002]

2. Description of the Related Art The purpose of this type of glitter display sheet is to aim at a design effect as a kind of decorative sheet. In addition, there is no one that can stand out in three dimensions.

[0003]

Therefore, the technical problem to be solved by the present invention is that the shadow of the assumed stereoscopic display body is made to appear only when viewed from a certain viewing angle, and as a result, the assumed stereoscopic display body is displayed. It is intended to provide a glittering three-dimensional display sheet which is three-dimensionally floated.

[0004]

Means, Actions and Effects for Solving the Problems In order to solve the above technical problems, the present invention provides a glittering stereoscopic display sheet having the following constitution.

This glittering three-dimensional display sheet comprises a base layer, a light reflecting layer, a transparent uneven layer having an uneven lower surface, and a transparent surface protective layer, which are laminated in this order from the bottom. The uneven lower surface of the transparent uneven layer is composed of a background portion and a hidden shadow portion.
The hidden shadow portion is formed by a parallel straight line concave-convex pattern aligned in a certain direction. On the other hand, the background portion around the hidden shadow portion is formed of a flat surface or an uneven pattern having a directionality different from the direction of the linear uneven pattern of the hidden shadow portion. In the above structure, external light incident on this sheet is reflected by the light reflecting layer, and the reflected light forms a light pattern corresponding to the uneven pattern on the uneven lower surface of the transparent uneven layer. However, in the above configuration, there is a difference between the linear unevenness pattern and the flat surface or the directionality of the linear unevenness pattern between the uneven lower surface of the hidden shaded portion and the uneven lower surface of the surrounding background portion. Depending on the angle, the hidden shadow part is dark while the background part looks bright, and as a result, the assumed three-dimensional display body appears to be three-dimensionally raised, and the hidden shadow part and the background part appear as a mixture, and as a result. The assumed stereoscopic display body may not be visually recognized in some cases. That is, according to this configuration, it is possible to obtain a design effect in which the unexpected stereoscopic display body appears three-dimensionally only when viewed from a certain viewing angle.

The transparent concavo-convex layer having the above structure is most preferably formed by conventional gravure printing. By this gravure printing method, it is possible to form an elaborate concavo-convex pattern, and by adjusting the plate depth, it is possible to easily adjust the concavo-convex depth. Further, the light reflecting layer can be easily formed by vapor deposition of a metal such as aluminum, and the base layer can be easily laminated integrally with the transparent surface protective layer by a conventional laminating process or a printing method. .. Thus, according to the present invention, the glittering stereoscopic display sheet can be provided at an extremely low cost.

In the above structure, in order to color the display sheet, for example, a transparent colored layer may be provided between the transparent surface protective layer and the transparent uneven layer.

[0008]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 2, this glittering stereoscopic display sheet has a laminated structure. That is, from the bottom,
The base layer 8, the anchor coat layer 7, the light reflection layer 6, the transparent uneven printed layer 5, the transparent colored layer 4, and the transparent display protective layer 3 are sequentially laminated and integrated. In the above structure, the transparent colored layer 4 is optional and is formed as needed. The light reflecting layer 6 is usually formed on the lower surface of the uneven printed layer 5 by a metal vapor deposition technique of aluminum. The base layer 8 is usually formed by a heat seal layer. As an example of a suitable material used for each of the above layers, the surface protection layer 3 is made of polyester, the anchor coat layer 7 is made of ethylene-acrylic acid copolymer, and the base layer 8 is made of polyethylene. It

As the concavo-convex printing layer 5, a solid content of 50% by weight of acrylic urethane resin and 10% by weight of cellulose resin, and a solvent (for example, a mixed solution of ethyl acetate and toluene) 4
An ink material in which an isocyanate as a curing agent, specifically, toluidine diisocyanate is added to a main material composed of 0% by weight is preferably used.

As shown in FIG. 2, an uneven pattern is formed on the lower surface of the uneven printed layer 5. The concavo-convex printed layer 5 having this concavo-convex pattern is formed by printing on the lower surface of the surface protective layer 3 on which the colored layer 4 is printed by gravure printing.

The state of the lower surface of the uneven printed layer 5 is shown in FIG.
Is shown in. In FIG. 1, the display in a form similar to “ABC” is the hidden shadow portion 2, and the surrounding area is the background portion 1. As is apparent from FIG. 1, the hidden shadow portion 2 is formed in a parallel linear concave-convex pattern having a directionality from the upper left to the lower right. On the other hand, the background portion 1 around the hidden shadow portion 2 is formed by a flat surface. The hidden shadow portion 2 corresponds to the shadow formed when the stereoscopic character "ABC" as the assumed stereoscopic display body 1a is illuminated with light from the upper left side in FIG.

The asperity depth of the asperity pattern of the asperity printing layer 5 is preferably 3 to 20 .mu., And most preferably about 5 .mu.m. Also,
The width between each linear convex portion or linear concave portion is 20 to 3
00μ is preferable.

According to the glittering stereoscopic display sheet having the above-described structure, the hidden shadow portion 2 may appear darker depending on, for example, the direction of light irradiation on the sheet and the viewing angle of the viewer. Is incomplete as "ABC"
Is displayed. On the other hand, in the case of the other viewing angle, the hidden shadow portion 2 and the background portion 1 are mixed together and are not clearly identified. As a modified example, the assumed stereoscopic display 1a around the hidden shadow portion, that is, "ABC", has a different directionality from the parallel linear uneven pattern of the hidden shadow portion 2 as shown by a virtual line in a part of FIG. You may form the parallel line uneven | corrugated pattern 1b. Also in this case, it is possible to obtain the same effect as that of the above-mentioned embodiment.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a concavo-convex pattern formed on a lower surface of a concavo-convex printed layer of a glittering stereoscopic display sheet according to an example of the present invention.

FIG. 2 is a sectional view of the glittering stereoscopic display sheet of FIG.

[Explanation of symbols]

1 Background part 1a Assumed stereoscopic display body 1b Parallel line uneven pattern 2 Hidden shadow part 3 Surface protection layer 4 Transparent coloring layer 5 Transparent uneven printing layer 6 Light reflection layer 7 Anchor coat layer 8 Base layer

Claims (1)

[Claims] 1. A base layer (8), a light reflection layer (6), a transparent uneven layer (5) having an uneven lower surface, and a transparent surface protective layer (3) are laminated in this order from the bottom, The uneven lower surface of the transparent uneven layer (5) is composed of a background portion (1) and a hidden shadow portion (2), and the hidden shadow portion (2) is a supposed stereoscopic display body (1) such as characters and patterns.
It is a part corresponding to the shadow formed when light is irradiated from a certain direction with respect to a) and is formed by parallel straight line uneven patterns aligned in a certain direction, while the surrounding of the hidden shadow part (2) The glittering stereoscopic display sheet, wherein the background portion (1) is formed on a flat surface or has an uneven pattern having a directionality different from the direction of the linear uneven pattern of the hidden shadow portion (2). ..