JP2021182072A - Display body - Google Patents

Abstract

[Problem] To provide a display capable of displaying a three-dimensional image that gives a strong three-dimensional impression to an observer. [Solution] The display 10 of the present invention is a display that displays a three-dimensional image including an image of a first object and an image of a second object as a diffraction image, and when a three-dimensional object is three-dimensionally restored from the three-dimensional image, a first three-dimensional object TOD1 corresponding to the first object is restored to a position in front of the display surface of the display 10 as viewed by an observer OB1 observing the display 10, and is restored to be separated from the display surface, and a second three-dimensional object TOD2 corresponding to the second object is restored to a position behind the display surface as viewed by the observer OB1, and is restored to be separated from the display surface, and no other three-dimensional object is restored between the first three-dimensional object TOD1 and the second three-dimensional object TOD2. [Selected Figure] Figure 3

Description

The present invention relates to a display body.

Conventionally, for the purpose of proving that an article such as a product is a genuine article, a display body capable of displaying a three-dimensional image by a hologram may be used in the above article (see Patent Documents 1 and 2). ). Further, instead of the hologram, a diffraction grating may be used to display a three-dimensional image (see Patent Documents 3 and 4). A display body that displays a three-dimensional image by a hologram or a diffraction grating is difficult to forge or reproduce.

Japanese Unexamined Patent Publication No. 2001-109362 Japanese Unexamined Patent Publication No. 2010-139673 Japanese Unexamined Patent Publication No. 6-281804 Japanese Unexamined Patent Publication No. 7-1042111

The three-dimensional image displayed by the hologram or diffraction grating may not give the observer a strong stereoscopic effect.
An object of the present invention is to provide a display body capable of displaying a three-dimensional image that gives an observer a strong stereoscopic effect.

According to one aspect of the present invention, it is a display body that displays a three-dimensional image including an image of a first object and an image of a second object as a diffraction image, and three-dimensionally restores a three-dimensional object from the three-dimensional image. If so, the first three-dimensional object corresponding to the first object is restored to a position in front of the display surface of the display body as seen from the observer observing the display body so as to be separated from the display surface. The second three-dimensional object corresponding to the second object is restored to a position at the back of the display surface as seen from the observer so as to be separated from the display surface, and the first three-dimensional object and the first three-dimensional object are restored. A display body is provided in which the other three-dimensional object is not restored between the two three-dimensional objects.

Here, the term "three-dimensional image" means an image that makes the observer feel a three-dimensional effect by binocular parallax or motion parallax. Further, the term "diffraction image" means an image displayed by a hologram or a diffraction grating.

As described above, according to this display body, the first three-dimensional object is restored to a position in front of the display surface of the display body, and the second three-dimensional object is restored to a position behind the display surface. Therefore, for example, if the display body is slightly rotated clockwise or counterclockwise around a predetermined axis while the lighting conditions are constant, the image of the first object moves to the right or left, and the first object is moved to the right or left. 2 The image of the object moves in the opposite direction to the image of the first object. Therefore, one of the image of the first object and the image of the second object emphasizes the movement of the other.

Further, as described above, the first three-dimensional object is restored to a position in front of the display surface so as to be separated from the display surface. On the other hand, the second three-dimensional object is restored to a position deeper than the display surface so as to be separated from the display surface. Then, another three-dimensional object (third three-dimensional object) is not restored between the first three-dimensional object and the second three-dimensional object. That is, the first three-dimensional object and the second three-dimensional object are discontinuous. With such a configuration, the above effects are not impaired, as described below.

When the third three-dimensional object is restored between the first three-dimensional object and the second three-dimensional object, the observer observes the relative image of the first object or the second object accompanying the rotation of the display body. The movement may be perceived with reference to the position of the image of the third object corresponding to the third three-dimensional object. Since the third three-dimensional object is located between the first three-dimensional object and the second three-dimensional object, the third object is also located between the first object and the second object. Therefore, when another three-dimensional object is restored between the first three-dimensional object and the second three-dimensional object, compared with the case where the other three-dimensional object is not restored between the first three-dimensional object and the second three-dimensional object. Therefore, the observer may feel that the amount of relative movement of the image of the first object or the second object due to the rotation of the display body is small.

In the above display body, the third three-dimensional object is not restored between the first three-dimensional object and the second three-dimensional object. Therefore, the effect that one of the image of the first object and the image of the second object emphasizes the movement of the other is not impaired by the image of the third object corresponding to the third three-dimensional object. Therefore, this display body can display a three-dimensional image that gives the observer a strong stereoscopic effect.

It should be noted that the same effect as described by taking stereoscopic vision by motion parallax as an example can be obtained also in the case of stereoscopic vision by binocular parallax.

According to another aspect of the present invention, when the display body is observed from the front, the display body according to the side surface in which the image of the first object and the image of the second object overlap at least partially. Is provided.
According to this configuration, the observer is particularly likely to perceive the relative movement of the image of the first object or the second object due to the rotation of the display body.

According to still another aspect of the present invention, the distance from the display surface to the first three-dimensional object and the distance from the display surface to the second three-dimensional object are each of 0.5 mm or more. Such an indicator is provided.
Increasing these distances makes it easier for the observer to perceive the relative movement of the image of the first object or the second object as the display body is rotated. These distances are preferably 1 mm or more.

According to still another aspect of the present invention, each of the first three-dimensional object and the second three-dimensional object is any of the above-mentioned aspects in which the entire object is located within a range of 4 mm or less from the display surface. A display body relating to the above is provided.

Generally, when this distance is increased, the image of the first object or the second object becomes dark. This distance is preferably 3 mm or less.

According to still another aspect of the present invention, the distance from the display surface of the surface of the first three-dimensional object at a position away from the display surface is separated from the display surface of the surface of the second three-dimensional object. A display body for any of the above aspects equal to the distance of the position from the display surface is provided.
This configuration is suitable when the brightness of the image of the first object and the brightness of the image of the second object are substantially equal to each other.

Alternatively, according to still another aspect of the present invention, the distance from the display surface of the surface of the first three-dimensional object at a position away from the display surface is from the display surface of the surface of the second three-dimensional object. A display body according to any of the above-mentioned surfaces, which is shorter than the distance from the display surface at a distant position, is provided.
This configuration is suitable when the image of the first object is displayed brighter than the image of the second object.

According to still another aspect of the present invention, a relief layer having a relief structure for displaying the three-dimensional image on one main surface and a region of the main surface having the relief structure provided at least partially. The display surface includes a coated reflective layer, and the display surface is provided with a display body according to any one of the surface of the reflective layer or the side surface which is an interface between the relief structure and the reflective layer.
A display body that adopts a structure that displays a three-dimensional structure by a relief structure can be manufactured with high productivity.

According to still another aspect of the present invention, the relief structure is provided with a display body according to the aspect in which the three-dimensional image is recorded as interference fringes.
According to still another aspect of the present invention, the printing layer further comprises a print layer facing the display surface, and the print layer is a display according to any one of the above surfaces which causes a plurality of protrusions on the surface of the display body. The body is provided.
In addition to being able to display a three-dimensional image, the display body adopting this configuration can make the observer feel a special tactile sensation due to the convex portion generated on the surface of the display body by the print layer.

According to still another aspect of the present invention, there is provided a display body according to the aspect, wherein the height of the plurality of protrusions is in the range of 5 to 40 μm.
If the height of the protrusions is small, it becomes difficult for the observer to tactilely perceive the presence of these protrusions when the observer touches the surface of the display body. If the height of the convex portion is excessively large, blocking is likely to occur.

According to still another aspect of the present invention, the plurality of protrusions are provided with a display body according to any one of the above aspects including a plurality of line patterns arranged in the width direction apart from each other.
When the observer touches the surface of the display body adopting this configuration, it is easy to perceive the presence of the convex portion by tactile sensation. In addition, this configuration makes the part of the three-dimensional image that was hidden behind the line pattern visible by slightly rotating the display body around an axis that is substantially parallel to the length direction of the line pattern. Suitable for. For example, when the display body in which the distance from the display surface to the first three-dimensional object is 1 mm is observed from the front (when observed at an observation angle of 0 °) and when observed at an observation angle of 10 °, the first 1 The position of the image of the object changes by about 0.17 mm. Therefore, if the width of the line pattern is sufficiently small, the part of the three-dimensional image that is hidden by the line pattern and cannot be seen can be seen.

According to still another aspect of the invention, the width of each of the plurality of line patterns is in the range of 0.02 to 0.1 mm, and the plurality of line patterns are in the range of 0.2 to 0.5 mm. A display body according to the above-mentioned side surface arranged by a pitch is provided.
According to this configuration, it is difficult to connect adjacent line patterns. Further, the display body adopting this configuration can easily perceive the existence of the convex portion by tactile sensation when the observer touches the surface thereof. Furthermore, this configuration makes the part of the three-dimensional image that was hidden behind the line pattern visible by slightly rotating the display around an axis that is approximately parallel to the length of the line pattern. Suitable for.

According to still another aspect of the present invention, there is provided a transfer foil including a transfer material layer including a display body according to any one of the above aspects, and a support that supports the transfer material layer so as to be peelable.

According to still another aspect of the present invention, there is provided an adhesive label provided with a display body according to any one of the above-mentioned side surfaces and an adhesive layer provided on the display body.

According to still another aspect of the present invention, there is provided an article with a display body including a display body according to any one of the above-mentioned side surfaces and an article supporting the display body.

The plan view which shows the display body which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II of the display shown in FIG. The figure which shows an example of the positional relationship in the virtual space between the display body of FIGS. 1 and 2, the first and second three-dimensional objects obtained by three-dimensionally restoring from the three-dimensional image displayed by the display body, and the observer. .. 1 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from substantially the front. 1 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from an oblique right side. 1 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from an oblique left side. A diagram showing an example of a positional relationship between an observer and a display body according to a first comparative example, a first and second three-dimensional object obtained by three-dimensionally restoring from a three-dimensional image displayed by the display body, and an observer. .. FIG. 7 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from substantially the front. FIG. 7 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from an oblique right side. FIG. 7 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from an oblique left side. A diagram showing an example of a positional relationship between an observer and a display body according to a second comparative example, a first and second three-dimensional object obtained by three-dimensionally restoring from a three-dimensional image displayed by the display body, and an observer. .. FIG. 11 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from substantially the front. FIG. 11 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from an oblique right side. FIG. 11 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from an oblique left side. The figure which shows an example of the positional relationship in virtual space between the display body of FIGS. 1 and 2 and the 1st and 2nd solid objects obtained by 3D reconstruction from the 3D image displayed by the display body. Sectional drawing of the display body which concerns on a modification. The figure which shows the image which the display body of FIG. 16 displays under a certain condition. The figure which shows the image which the display body of FIG. 16 displays under other conditions. Sectional drawing which shows an example of the transfer foil. Sectional drawing which shows an example of an adhesive label. A plan view showing an example of an article with a display body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are more specific of any of the above aspects. Elements having similar or similar functions are designated by the same reference numerals, and duplicate description will be omitted.

<Display body>
FIG. 1 is a plan view showing a display body according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II-II of the display shown in FIG.

In the figure, the X direction and the Y direction are directions parallel to the main surface of the display body 10 and orthogonal to each other. Further, the Z direction is a direction perpendicular to the X direction and the Y direction. That is, the Z direction is the thickness direction of the display body 10.

The display body 10 shown in FIGS. 1 and 2 includes a relief layer 11, a reflective layer 12, and a protective layer 13.
The relief layer 11 is made of a light-transmitting material, for example, a colorless and transparent material. A relief structure RS that displays a three-dimensional image as a diffracted image is provided on the main surface of the relief layer 11 on the reflective layer 12 side. Here, the relief structure RS is provided only in a part of the main surface. Of the main surfaces of the relief layer 11, the region provided with the relief structure RS is the first region R1, a part of the region not provided with the relief structure RS is the second region R2, and the remaining region is This is the third area.

Here, the first region R1 has an oval shape extending in the X direction. The second region R2 surrounds the first region R1. The third region extends along an edge parallel to the Y direction of the relief layer 11. The main surface of the relief layer 11 does not have to include at least one of the second region R2 and the third region.

The relief structure RS may constitute a surface relief type hologram, or may be a diffraction grating. In the former case, for the relief structure RS, for example, the configuration described in International Publication No. 2017/209113 can be adopted. In the latter case, for the relief structure RS, for example, the configurations described in JP-A-6-281804 and JP-A-7-104211 can be adopted.

As described above, the relief structure RS displays a three-dimensional image as a diffraction image. The relief structure RS may be designed to display a monochromatic image or may be designed to display a multicolor image. The three-dimensional image displayed by the relief structure RS will be described in detail later.

The reflective layer 12 covers the first region R1 and the second region R2. The reflective layer 12 is a patterned metal layer. The portion of the reflective layer 12 that covers the relief structure RS has a conformal shape with respect to the relief structure.

The protective layer 13 covers the reflective layer 12 and has the same shape as the reflective layer 12. The protective layer 13 is a layer used as an etching mask when the metal layer is patterned into the reflective layer 12. The protective layer 13 can be omitted.

As described below, the display body 10 can display a three-dimensional image that gives the observer a strong stereoscopic effect.

FIG. 3 shows the positional relationship between the display body of FIGS. 1 and 2, the first and second three-dimensional objects obtained by three-dimensional restoration from the three-dimensional image displayed by the display body, and the observer in a virtual space. It is a figure which shows an example. FIG. 4 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from substantially the front. FIG. 5 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from an oblique right side. FIG. 6 is a diagram showing an image displayed when the display body shown in FIGS. 1 to 3 is observed from an oblique left side.

As shown in FIG. 3, the relief structure RS of the display body 10 shown in FIGS. 1 and 2 is a first three-dimensional object TOD1 and a second three-dimensional object when a three-dimensional object is three-dimensionally restored from the three-dimensional image displayed by the relief structure RS. It is designed to restore the thing TOD2. Further, as shown in FIG. 3, this relief structure RS has another structure between the first three-dimensional object TOD1 and the second three-dimensional object TOD2 when the three-dimensional object is three-dimensionally restored from the three-dimensional image displayed by the relief structure RS. It is designed so that three-dimensional objects are not restored.

Here, the first three-dimensional object TOD1 has a star shape in which the central portion is thicker than the peripheral portion, and the thickness direction thereof is parallel to the Z direction. Further, here, the second three-dimensional object TOD2 has a disk shape, and its thickness direction is parallel to the Z direction.

The first three-dimensional object TOD1 is restored to a position in front of the display surface of the display body 10 when viewed from the observers OB1 to OB3 observing the display body 10 so as to be separated from the display surface. The second three-dimensional object TOD2 is restored to a position at the back of the display body 10 when viewed from the observers OB1 to OB3 so as to be separated from the display surface. Here, the display surface of the display body 10 is a plane that is perpendicular to the thickness direction of the display body 10 and in which the interface between the relief layer 11 and the reflection layer 12 is located.

Here, the positions of the first three-dimensional object TOD1 and the second three-dimensional object TOD2 are the same when viewed from the Z direction. In reality, the portion of the first three-dimensional object TOD1 that does not face any of the observers OB1 to OB3 is not three-dimensionally restored. Further, the portion of the second three-dimensional object TOD2 that is blocked by the first three-dimensional object TOD1 and cannot be seen by any of the observers OB1 to OB3 is not three-dimensionally restored. In FIG. 3, in order to facilitate understanding, these three-dimensional objects are drawn as if such a part was also three-dimensionally restored.

The three-dimensional restoration of a three-dimensional object from a three-dimensional image is performed by the following method.
That is, first, a plurality of images displayed by the display body 10 are imaged at different observation angles, and feature points are matched between the images. ORB, SIFT or FLAN can be used to match feature points between images.

The position of each feature point in the virtual space can be obtained by using the principle of triangulation. Therefore, using this, a three-dimensional object is restored in the virtual space.

When restoring a three-dimensional object from three or more images using the principle of triangulation, the same feature points may appear at multiple positions in the virtual space. In this case, the center of gravity of these positions is set as the position of the feature point in the virtual space. In this case, when the same feature point appears at a plurality of positions in the virtual space and one position is largely deviated from the other two or more positions, the former can be excluded and the center of gravity can be calculated.

Next, the display body 10 is reproduced in the virtual space in which the three-dimensional object is restored. Specifically, the display body 10 is displayed in the virtual space so that the image perceived by the observer reproduced in the virtual space when the three-dimensional object is viewed and the image displayed by the display body 10 toward the observer overlap. To reproduce.
When the first three-dimensional object TOD1 and the second three-dimensional object TOD2 are restored in the virtual space as described above and the display body 10 and the observer OB1 are reproduced, the display body 10 is displayed using them as follows. Can explain the image to be used.

When the surface of the display body 10 on the relief layer 11 side is illuminated with white light from a direction perpendicular to the X direction and inclined with respect to the Y direction and observed from substantially the front, that is, the observer OB1 When observed from the position of, the display body 10 displays the image I1 of the first object and the image I2 of the second object as shown in FIG. Here, the first object and the second object correspond to the above-mentioned first three-dimensional object TOD1 and second three-dimensional object TOD2, respectively. That is, here, the first object has a star shape whose central portion is thicker than that of the peripheral portion, and the second object has a disk shape. Under the above observation conditions, the display body 10 faces the image I1 and the image I2 substantially in front of each other, the first object is located in front of the second object, and the position of the center thereof is located. Display to match.

When the surface of the display body 10 on the relief layer 11 side is observed diagonally from the right under the same lighting conditions, that is, when the display body 10 is observed from the position of the observer OB2, the display body 10 is the image I1 of the first object. The image I2 of the second object is displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the left when viewed from the observer and slightly moved to the left from the state of FIG. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the left and slightly moved to the right from the state of FIG. 4 when viewed from the observer.

Further, under the same lighting conditions, when the surface of the display body 10 on the relief layer 11 side is observed diagonally from the left, that is, when the display body 10 is observed from the position of the observer OB3, the display body 10 is an image of the first object. I1 and the image I2 of the second object are displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the right when viewed from the observer and slightly moved to the right from the state of FIG. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the right when viewed from the observer and slightly moved to the left from the state of FIG.

As described above, the display body 10 is configured so that the orientation and position of the first and second objects in the image displayed by the display body 10 continuously change according to the change in the observation angle. Therefore, the image displayed by the display body 10 looks three-dimensional due to binocular parallax and / or motion parallax.

FIG. 7 shows the positional relationship between the observer and the display body according to the first comparative example, the first and second three-dimensional objects obtained by three-dimensionally restoring from the three-dimensional image displayed by the display body, and the observer. It is a figure which shows an example. FIG. 8 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from substantially the front. FIG. 9 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from an oblique right side. FIG. 10 is a diagram showing an image displayed when the display body shown in FIG. 7 is observed from an oblique left side.

The display body 10 of FIG. 7 is the same as the display body 10 described with reference to FIGS. 1 to 6 except that the following design is adopted. That is, in the display body 10 of FIG. 7, the first three-dimensional object TOD1 is located in front of the display surface of the display body 10 when viewed from the observers OB1 to OB3 observing the display body 10, but is in contact with the display surface. Will be restored. Further, the second three-dimensional object TOD2 is located at the back of the display body 10 when viewed from the observers OB1 to OB3, but is restored so as to be in contact with the display surface.

When the surface of the display body 10 in FIG. 7 on the relief layer 11 side is illuminated with white light from a direction perpendicular to the X direction and tilted with respect to the Y direction, and this is observed from substantially the front, that is, When observed from the position of the observer OB1, the display body 10 displays the image I1 of the first object and the image I2 of the second object as shown in FIG. That is, the image displayed by the display body 10 of FIG. 7 under this condition is almost the same as the image described with reference to FIG.

Under the same lighting conditions, when the surface of the display body 10 shown in FIG. 7 on the relief layer 11 side is observed diagonally from the right, that is, when the display body 10 is observed from the position of the observer OB2, the display body 10 is the first object. The image I1 of the object and the image I2 of the second object are displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the left when viewed from the observer without changing the position. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the left when viewed from the observer without changing the position.

Further, under the same lighting conditions, when the surface of the display body 10 shown in FIG. 7 on the relief layer 11 side is observed diagonally from the left, that is, when the display body 10 is observed from the position of the observer OB3, the display body 10 is the first. The image I1 of the first object and the image I2 of the second object are displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the right when viewed from the observer without changing the position. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the right when viewed from the observer without changing the position.

As described above, the display body 10 shown in FIG. 7 is also configured so that the orientations of the first and second objects in the image displayed by the display body 10 continuously change according to the change in the observation angle. Therefore, the image displayed by the display body 10 looks three-dimensional due to binocular parallax and / or motion parallax. However, the display body 10 shown in FIG. 7 hardly moves in the opposite direction of the first and second objects in the image displayed by the display body 10 even if the observation angle is changed. Therefore, the three-dimensional image displayed by the display body 10 shown in FIG. 7 does not give the observer a strong stereoscopic effect as much as the three-dimensional image displayed by the display body 10 described with reference to FIGS. 1 to 6.

FIG. 11 shows the positional relationship between the observer and the display body according to the second comparative example, the first and second three-dimensional objects obtained by three-dimensionally restoring from the three-dimensional image displayed by the display body, and the observer. It is a figure which shows an example. FIG. 12 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from substantially the front. FIG. 13 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from an oblique right side. FIG. 14 is a diagram showing an image displayed when the display body shown in FIG. 11 is observed from an oblique left side.

The display body 10 of FIG. 11 is the same as the display body 10 described with reference to FIGS. 1 to 6 except that the following design is adopted. That is, in the display body 10 of FIG. 11, the second three-dimensional object TOD2 is restored to have a larger dimension in the Z direction as compared with the display body 10 described with reference to FIGS. 1 to 6. Specifically, in the display body 10 of FIG. 11, a part of the second three-dimensional object TOD2 is located in the back of the display body 10 as viewed from the observers OB1 to OB3, but the remaining part is. It is restored so as to be in contact with the first three-dimensional object TOD1 at a position in front of the display body 10 when viewed from the observers OB1 to OB3.

When the surface of the display body 10 of FIG. 11 on the relief layer 11 side is illuminated with white light from a direction perpendicular to the X direction and inclined with respect to the Y direction, and this is observed from substantially the front, that is, When observed from the position of the observer OB1, the display body 10 displays the image I1 of the first object and the image I2 of the second object as shown in FIG. That is, the image displayed by the display body 10 of FIG. 11 under this condition is almost the same as the image described with reference to FIG.

Under the same lighting conditions, when the surface of the display body 10 shown in FIG. 11 on the relief layer 11 side is observed diagonally from the right, that is, when the display body 10 is observed from the position of the observer OB2, the display body 10 is the first object. The image I1 of the object and the image I2 of the second object are displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the left when viewed from the observer and slightly moved to the left from the state of FIG. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the left when viewed from the observer without changing the position.

Further, under the same lighting conditions, when the surface of the display body 10 shown in FIG. 11 on the relief layer 11 side is observed diagonally from the left, that is, when the display body 10 is observed from the position of the observer OB3, the display body 10 is the first. The image I1 of the first object and the image I2 of the second object are displayed as shown in FIG. That is, the display body 10 displays the image I1 as if the first object turned diagonally to the right when viewed from the observer and slightly moved to the right from the state of FIG. Further, the display body 10 displays the image I2 as if the second object turned diagonally to the right when viewed from the observer without changing the position.

As described above, the display body 10 shown in FIG. 11 is also configured so that the orientations of the first and second objects in the image displayed by the display body 10 continuously change according to the change in the observation angle. Further, in the display body 10, when the observation angle is changed, the relative movement of the first and second objects in the image displayed by the display body 10 in the opposite direction occurs. Therefore, the image displayed by the display body 10 looks three-dimensional due to binocular parallax and / or motion parallax. However, in this display body 10, when the observation angle is changed, the image I1 is displayed as if the first object has moved slightly, but the image I2 is displayed without changing the position of the second object. indicate. Therefore, the amount of relative movement of the first and second objects in the opposite direction in the image displayed by the display body 10 is small. Therefore, the three-dimensional image displayed by the display body 10 shown in FIG. 11 does not give the observer a strong stereoscopic effect as much as the three-dimensional image displayed by the display body 10 described with reference to FIGS. 1 to 6.

As described above, the display body 10 described with reference to FIGS. 1 to 6 can display a three-dimensional image that gives the observer a strong stereoscopic effect.

It is preferable to adopt the following design for the display body 10.
FIG. 15 is a diagram showing an example of the positional relationship between the display bodies of FIGS. 1 and 2 and the first and second three-dimensional objects obtained by three-dimensionally restoring from the three-dimensional image displayed by the display body in a virtual space. Is.

_{As described above, each of the distance D1 min} from the display surface to the first three- _{dimensional object TOD1 and the distance D2 min} from the display surface to the second three-dimensional object TOD2 is preferably 0.5 mm or more. _Increasing each of these distances D1 _min and D2 min makes it easier for the observer to perceive the relative movement of the images of the first object and the second object due to the rotation of the display body 10.

As described above, it is preferable that the entire first three-dimensional object TOD1 is located within a range in which _{the distance D1 max from the display surface is 4 mm or less.} Similarly, as described above, it is preferable that the entire second three-dimensional object TOD2 is located within a range in which _{the distance D2 max from the display surface is 4 mm or less.} When the first three-dimensional object TOD1 includes a portion having a long distance from the display surface, the image of the first object becomes dark at the position corresponding to this portion. Similarly, when the second three-dimensional object TOD2 includes a portion having a long distance from the display surface, the image of the second object becomes dark at the position corresponding to this portion.

<Transformation example of display body>
The display body 10 described with reference to FIGS. 1 to 6 can be variously modified.
FIG. 16 is a cross-sectional view of a display body according to a modified example.
The display body 10 shown in FIG. 16 is the same as the display body 10 described with reference to FIGS. 1 to 6 except that the print layer 14 is further included.

The print layer 14 is provided on the relief layer 11. The print layer 14 includes a plurality of line patterns 141 arranged in the width direction apart from each other. Here, each of the line patterns 141 extends in the Y direction and is arranged in the X direction.

The print layer 14 has a plurality of convex portions on the surface of the display body 10. Therefore, in addition to being able to display a three-dimensional image that gives the observer a strong stereoscopic effect, the display body 10 can display a three-dimensional image similar to the display body 10 described with reference to FIGS. 1 to 6. It can make the observer feel a special touch.

The pattern constituting the print layer 14, here the line pattern 141, may be light-transmitting or light-shielding. Even in the latter case, the display body 10 can display a three-dimensional image that gives the observer a strong stereoscopic effect.

FIG. 17 is a diagram showing an image displayed by the display body of FIG. 16 under certain conditions. FIG. 18 is a diagram showing an image displayed by the display body of FIG. 16 under other conditions.

When the line pattern 141 is light-shielding, as shown in FIGS. 17 and 18, of the images I1 and I2 displayed by the relief structure RS, the portion located directly below the line pattern 141 is hidden by the line pattern 141. can not see. However, as shown in FIGS. 17 and 18, when the observation angle is changed, the portion hidden by the line pattern 141 and not visible becomes visible.

The height of the convex portion formed on the surface of the display body 10 by the print layer 14 is preferably in the range of 5 to 40 μm. If the height of the protrusions is small, it becomes difficult for the observer to perceive the presence of these protrusions by touch when the observer touches the surface of the display body 10. If the height of the convex portion is excessively large, blocking is likely to occur. The print layer 14 having a large convex portion can be formed by, for example, intaglio printing.

The width of each of the line patterns 141 is preferably in the range of 0.02 to 0.1 mm. Further, it is preferable that the line patterns 141 are arranged at a pitch within the range of 0.2 to 0.5 mm.

According to this configuration, it is difficult to connect adjacent line patterns 141. Further, the display body 10 adopting this configuration can easily perceive the presence of the convex portion by tactile sensation when the observer touches the surface thereof. Furthermore, this arrangement of the three-dimensional image, the portion that has not hidden the line pattern 141, thereby slightly rotating the display body 10 about the axis A _R substantially parallel to the length direction of the line pattern 141 Suitable for making visible by.

<Transfer foil>
FIG. 19 is a cross-sectional view showing an example of a transfer foil.

The transfer foil 2 shown in FIG. 19 includes a support 21, a transfer material layer 22, and an adhesive layer 23.
The support 21 supports the transfer material layer 22 so as to be peelable. The support 21 has, for example, a band shape.

The transfer material layer 22 includes a relief layer 221, a reflective layer 222, a protective layer 223, and a peeling protective layer 224. The peel-off protective layer 224, the relief layer 221, the reflective layer 222, and the protective layer 223 are laminated on the support 21 in this order. The stacking order of the relief layer 221, the reflective layer 222, and the protective layer 223 may be reversed.

The transfer material layer 22 includes a transfer portion that is transferred to the article by applying heat pressure and a non-transfer portion that is not transferred to the article. The transfer unit is a portion used as the display body 10 described above. Therefore, the portion of the relief layer 221 located at the transfer portion, the portion of the reflective layer 222 located at the transfer portion, and the portion of the protective layer 223 located at the transfer portion are the relief layer 11 and the reflective layer, respectively. It corresponds to 12 and the protective layer 13.

The peel protection layer 224 is provided so as to be adjacent to the support 21. The peel protection layer 224 is made of a light-transmitting material, for example, a colorless and transparent material. The peel protection layer 224 can be omitted.

The adhesive layer 23 faces the support 21 with the transfer material layer 22 interposed therebetween. The base material of the adhesive layer can be a thermoplastic resin. The resin component can be an acrylic resin. The acrylic resin can be polymethylmethacrylate or the like. The transfer foil 2 may or may not include the adhesive layer 23.

<Adhesive label>
FIG. 20 is a cross-sectional view showing an example of an adhesive label.

The adhesive label 3 shown in FIG. 20 includes a display body 31 and an adhesive layer 32. In FIG. 20, reference numeral 33 represents a release sheet.

The display body 31 includes a base material 311, a reflective layer 312, and a protective layer 313. The display body 31 corresponds to the display body 10 described above. Therefore, the base material 311, the reflective layer 312, and the protective layer 313 correspond to the relief layer 11, the reflective layer 12, and the protective layer 13, respectively.

The adhesive layer 32 is provided on one main surface of the display body 31. The adhesive layer 32 is protected by the release sheet 33 until immediately before the use of the adhesive label 3.

The adhesive layer 32 is made of an adhesive such as a pressure-sensitive adhesive. As the pressure-sensitive adhesive, for example, a vinyl chloride-vinyl acetate copolymer, a polyester-based polyamide, or an acrylic-based, butyl rubber-based, natural rubber-based, silicone-based or polyisobutyl-based pressure-sensitive adhesive is used.

The pressure-sensitive adhesive may further contain an additive. Additives include, for example, agglomerating components such as alkyl methacrylates, vinyl esters, acrylic nitriles, styrene and vinyl monomers; modifying components such as unsaturated carboxylic acids, hydroxy group-containing monomers and acrylic nitriles; polymerization initiators; plasticizers; Use a curing agent; a curing accelerator; an antioxidant; or a mixture containing two or more of them.

<Items with display>
FIG. 21 is a plan view showing an example of an article with a display body.

The article 4 with a display shown in FIG. 21 is a printed matter. The article 4 with a display is, for example, a personal authentication medium such as a banknote, securities, certificates, a credit card, a passport, and an ID (identification) card, or a package for packaging the contents.

The article 4 with a display body includes a display body 41 and an article 42 that supports the display body 41.

The display body 41 is the display body 10 described above. The display body 41 is supported by the article 42, for example, by being attached to the surface of the article 42 or embedded in the article 42.

The article 42 includes an article body 421 such as a printing substrate and a printing layer 422 provided on the article body 421. The material of the article body 421 is, for example, plastic, metal, paper, or a composite thereof.

An example of the present invention will be described below.
(Example 1)
The transfer foil 2 described with reference to FIG. 19 was manufactured. The protective layer 223 is omitted. Further, for the transfer material layer 22, the structure described for the display body 10 was adopted with reference to FIGS. 1 to 6 and 15.

Here, the first three-dimensional object TOD1 has a star shape having no thickness, and the distances D1 _min and D1 _max are each 2 mm. Further, the second three-dimensional object TOD2 has a lunar shape having no thickness, and each of the distances D2 _min and D2 _max is 2 mm.

For the relief structure RS, the structure described in International Publication No. 2017/209113 was adopted. Specifically, each of the first three-dimensional object TOD1 and the second three-dimensional object TOD2 was divided into a square region having a side length of 100 μm, and the viewing angles in the X and Y directions were set to 20 °. The minimum size of the pattern included in the relief structure RS was 400 nm, and the depth was set to 4 levels.

In the production of the transfer foil 2, first, a nickel plate was produced. Specifically, a pattern corresponding to the relief structure RS was drawn on the surface of the resist layer using an electron beam writing apparatus. Next, nickel was sputtered on this surface, and nickel was further plated. Then, the resist layer was removed from the nickel layer. As described above, a nickel plate was obtained.

Next, a film made of polyethylene terephthalate was prepared as the support 21, and a liquid containing polymethylmethacrylic acid and polyethylene wax was applied onto the film to form a peeling protective layer 224. Next, a layer containing an acrylic polyol, an isocyanate, and a fluororesin was formed on the peel protection layer 224. The nickel plate was attached to this layer, and a heating roll having a temperature set to 150 ° C. was pressed against the layer, and the plate pattern was transferred by irradiating with ultraviolet rays. As a result, a relief layer 221 was obtained.

After peeling the laminate including the relief layer 221, the peeling protection layer 224, and the support 21 from the plate, aluminum was vapor-deposited on the relief layer 221 to form the reflective layer 222. Further, an ethylene-vinyl acetate copolymer was applied onto the reflective layer 222 to form an adhesive layer 23.
As described above, the transfer foil 2 shown in FIG. 19 was obtained.

Next, using this transfer foil 2, an article with a display body was manufactured. Here, high-quality paper was used as an article to support the display body. In manufacturing the article with a display body, the transfer foil 2 was placed on high-quality paper, and in this state, heat pressure was applied to a part of the laminated body. Next, the support 21 was peeled off from the woodfree paper together with the portion of the transfer material layer 22 to which no thermal pressure was applied. In this way, the portion of the transfer material layer 22 to which the heat pressure was applied was transferred from the support 21 to the wood-free paper as the display body 10. As described above, an article with a display body was obtained.

The article with the display body was illuminated with white light, and the three-dimensional image displayed by the display body 10 was observed with the naked eye. As a result, it was confirmed that the display body 10 displays a three-dimensional image that gives the observer a strong stereoscopic effect.

(Comparative example)
An article with a display body was manufactured by the same method as in Example 1 except that the relief structure RS was designed so that the second three-dimensional object TOD2 would not be restored when the three-dimensional image was three-dimensionally restored.

The article with the display body was illuminated with white light, and the three-dimensional image displayed by the display body was observed with the naked eye. As a result, it was confirmed that this display body does not give the observer a strong three-dimensional effect as the display body 10 of Example 1.

(Example 2)
After transferring a part of the transfer material layer 22 from the support 21 to the wood-free paper, the display body is formed by the same method as in Example 1 except that the print layer 14 described with reference to FIGS. 16 to 18 is formed. Manufactured an attached article. Here, the print layer 14 is formed by intaglio printing. The thickness of the print layer 14 was 15 μm, the width of the line pattern 141 was 0.05 mm, and the pitch of the line pattern 141 was 0.3 mm.

The article with the display body was illuminated with white light, and the three-dimensional image displayed by the display body 10 was observed with the naked eye. As a result, under certain conditions, the portion of the images I1 and I2 located directly below the line pattern 141 was hidden behind the line pattern 141 and could not be seen, but by changing the observation angle, the line pattern 141 was formed. The parts that were hidden and could not be seen can now be seen. Further, it was confirmed that the display body 10 gives the observer a stronger three-dimensional effect as compared with the display body of the comparative example. Further, the display body 10 was able to recognize the unevenness caused by the line pattern 141 as a difference in tactile sensation from other parts by touching the print layer 14.

2 ... Transfer foil, 3 ... Adhesive label, 4 ... Article with display body, 10 ... Display body, 11 ... Relief layer, 12 ... Reflective layer, 13 ... Protective layer, 14 ... Printing layer, 21 ... Support, 22 ... Transfer Material layer, 23 ... adhesive layer, 31 ... display body, 32 ... adhesive layer, 33 ... peeling sheet, 41 ... display body, 42 ... article, 141 ... line pattern, 221 ... relief layer, 222 ... reflective layer, 223 ... protection layers, 224 ... peeling protective layer, 421 ... article body, 422 ... printing layer, A R _... shaft, I1 ... image, I2 ... image, OB1 ... observer, OB2 ... observer, OB3 ... observer, R1 ... first Region, R2 ... second region, RS ... relief structure, TOD1 ... first three-dimensional object, TOD2 ... second three-dimensional object.

Claims (15)

A display body that displays a three-dimensional image including an image of a first object and an image of a second object as a diffraction image.
When a three-dimensional object is three-dimensionally restored from the three-dimensional image,
The first three-dimensional object corresponding to the first object is restored to a position in front of the display surface of the display body when viewed from the observer observing the display body so as to be separated from the display surface.
The second three-dimensional object corresponding to the second object is restored to a position at the back of the display surface as seen from the observer so as to be separated from the display surface.
A display body in which no other three-dimensional object is restored between the first three-dimensional object and the second three-dimensional object. The display body according to claim 1, wherein the image of the first object and the image of the second object overlap at least partially when the display body is observed from the front. The display body according to claim 1 or 2, wherein the distance from the display surface to the first three-dimensional object and the distance from the display surface to the second three-dimensional object are each 0.5 mm or more. The display according to any one of claims 1 to 3, wherein each of the first three-dimensional object and the second three-dimensional object is located within a range of 4 mm or less from the display surface as a whole. body. The distance from the display surface at the position farthest from the display surface on the surface of the first three-dimensional object is the distance from the display surface at the position farthest from the display surface on the surface of the second three-dimensional object. The display body according to any one of claims 1 to 4, which is equal to. The distance from the display surface at the position farthest from the display surface on the surface of the first three-dimensional object is the distance from the display surface at the position farthest from the display surface on the surface of the second three-dimensional object. The display body according to any one of claims 1 to 4, which is shorter than that of the above. A relief layer having a relief structure for displaying the three-dimensional image on one main surface, and a relief layer.
It comprises a reflective layer that at least partially covers the region of the main surface where the relief structure is provided, and the display surface is at the surface of the reflective layer or at the interface between the relief structure and the reflective layer. The display body according to any one of claims 1 to 6. The display body according to claim 7, wherein the three-dimensional image is recorded as interference fringes in the relief structure. The display body according to claim 7 or 8, further comprising a print layer facing the display surface, wherein the print layer has a plurality of convex portions on the surface of the display body. The display body according to claim 9, wherein the height of the plurality of convex portions is in the range of 5 to 40 μm. The display body according to claim 9 or 10, wherein the plurality of convex portions include a plurality of line patterns arranged apart from each other in the width direction. 11. The width of each of the plurality of line patterns is in the range of 0.02 to 0.1 mm, and the plurality of line patterns are arranged at a pitch in the range of 0.2 to 0.5 mm. The display body described. A transfer material layer containing the display body according to any one of claims 1 to 12.
A transfer foil provided with a support that supports the transfer material layer so that it can be peeled off. The display body according to any one of claims 1 to 12, and the display body.
An adhesive label provided with an adhesive layer provided on the display body. The display body according to any one of claims 1 to 12, and the display body.
An article with a display body including an article supporting the display body.

Images