JP2024095559A - Color image display laminate body and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color image display laminate body which displays a sophisticated color image.

SOLUTION: The color image display laminate body according to the present invention includes a laminate structure of a plurality of fine irregular layers provided with fine irregularities which contribute to presenting different colors and a plurality of reflection layers arranged to cover the small irregularities of the fine irregular layers. A first one of the plurality of reflection layers which is the nearest to an observation side where the color display body is observed is partially removed so that a first opening segment is formed.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a color image display laminate that uses on-demand display technology and a method for producing the same.

Display devices used for personal authentication, such as passports and ID cards, typically contain information linked to the owner of the display device, such as a facial image, which is provided on demand.

There is a medium described in Patent Document 1 that features on-demand color images. Patent Document 1 relates to a structure that displays color images using a diffraction grating. A cell corresponding to one pixel consists of red, blue, and green subcells, and any on-demand color image is realized by selectively removing the light-reflecting layer that covers the diffraction grating of each subcell and blackening the marking layer.

Patent document 2 describes a diffractive structure supported on a polycarbonate substrate and an overlay including a reflection-enhancing coating. The device describes a device in which a portion of a metal layer on a hologram is removed by a laser to form a transparent portion, allowing the information underneath to be seen.

JP 2018-120010 A JP 2009-248571 A JP 2007-225639 A

However, the medium described in Patent Document 1 requires technology to print within the subcells with high precision. If each subcell is printed with low-precision alignment, the mixing ratio of each color will change if the printing area is misaligned. This makes it difficult to create a color image with the desired color scheme.

In addition, in the medium described in Patent Document 2, the hologram and the information beneath the hologram are combined through different optical phenomena to form the design of the medium. Therefore, the designs that can be produced are limited.

The problem that the present invention aims to solve is to provide a color image display laminate that displays sophisticated color images, and a method for producing the same.

To achieve the above-mentioned objectives, the present invention takes the following measures:

The first aspect is a color display laminate comprising at least a plurality of fine uneven layers provided with fine unevenness that contributes to the presentation of different colors, and a plurality of reflective layers arranged to cover the fine unevenness of the plurality of fine uneven layers, characterized in that a first aperture segment is formed by removing a portion of a first reflective layer, among the plurality of reflective layers, that is closest to the observation side on which the color display laminate is observed.

The second aspect is the color image display laminate of the first aspect, characterized in that a second aperture segment is formed by removing a portion of a second reflective layer, which is the next closest to the observation side after the first reflective layer, among the plurality of reflective layers, and at least a portion of the first aperture segment and at least a portion of the second aperture segment face each other across a second fine concave-convex layer, which is one of the plurality of fine concave-convex layers and has fine concaves and convexes covered by the second reflective layer.

The third aspect is a color image display laminate of the second aspect, characterized in that the plurality of fine uneven layers and the plurality of reflective layers each have at least three layers, a third aperture segment is formed by removing a portion of a third reflective layer, which is the next closest to the observation side after the second reflective layer, among the plurality of reflective layers, and at least a portion of the second aperture segment and at least a portion of the third aperture segment face each other across a third fine uneven layer, which has fine unevenness covered by the third reflective layer, among the plurality of fine uneven layers.

The fourth aspect is a color image display laminate according to any one of the first to third aspects, further comprising a printed layer as the layer furthest from the observation side, and characterized in that a fourth opening segment from which the reflective layer has been removed is continuous along the stacking direction from the observation side to the printed layer.

The fifth aspect is a color image display laminate according to any one of the first to third aspects, further comprising a laser coloring layer as the layer furthest from the observation side, and characterized in that a fifth opening segment from which the reflective layer has been removed is continuous along the stacking direction from the observation side to the laser coloring layer.

The sixth aspect is a color image display laminate according to any one of the first to third aspects, characterized in that the plurality of fine uneven layers and the plurality of reflective layers each have at least three layers, and the at least three fine uneven layers include a fine uneven layer provided with fine unevenness that contributes to presenting a red color, a fine uneven layer provided with fine unevenness that contributes to presenting a blue color, and a fine uneven layer provided with fine unevenness that contributes to presenting a green color.

The seventh aspect is a color image display laminate according to any one of the first to third aspects, characterized in that the plurality of fine uneven layers and the plurality of reflective layers each have at least three layers, and the at least three fine uneven layers include a fine uneven layer provided with fine unevenness that contributes to presenting cyan, a fine uneven layer provided with fine unevenness that contributes to presenting magenta, and a fine uneven layer provided with fine unevenness that contributes to presenting yellow.

The eighth aspect is a color image display laminate according to any one of the first to third aspects, characterized in that the fine irregularities provided in each of the plurality of fine irregularity layers are made of a diffraction grating.

The ninth aspect is a color image display laminate according to any one of the first to third aspects, characterized in that the fine irregularities provided in each of the plurality of fine irregularity layers are phase modulation elements of a computer-generated hologram that forms a three-dimensional reconstructed image.

The tenth aspect is a color image display laminate according to any one of the first to third aspects, characterized in that at least one of the plurality of reflective layers is in contact with an opposing fine concave-convex layer of the plurality of fine concave-convex layers.

The eleventh aspect is a color image display laminate according to any one of the first to third aspects, characterized in that at least one of a release layer and an adhesive layer is disposed between any of the layers.

The twelfth aspect is the color image display laminate of the eleventh aspect, characterized in that the layer disposed between any of the layers has a lower infrared transmittance than the plurality of fine concave-convex layers.

The thirteenth aspect is a color image display laminate according to any one of the first to third aspects, characterized in that at least one of the plurality of fine concave-convex layers has a lower infrared transmittance than the other fine concave-convex layers.

The fourteenth aspect is the color image display laminate of the fourth aspect, characterized in that the printing layer is black and absorbs visible light.

The fifteenth aspect is a method for producing a color image display laminate, characterized in that it includes a step of removing a portion of the first reflective layer in the color image display laminate of the first aspect by irradiating it with a laser beam.

The sixteenth aspect is a method for producing a color image display laminate, characterized in that it includes a step of removing a portion of the second reflective layer in the color image display laminate of the second aspect by irradiating it with a laser beam.

The seventeenth aspect is a method for producing a color image display laminate, characterized in that the step of removing a portion of the first reflective layer and the step of removing a portion of the second reflective layer in the color image display laminate of the second aspect are simultaneously carried out by irradiating with a laser beam.

The eighteenth aspect is a method for producing a color image display laminate, characterized in that it includes a step of removing a portion of the third reflective layer in the color image display laminate of the third aspect by irradiating it with a laser beam.

The nineteenth aspect is a method for producing a color image display laminate, characterized in that the step of removing a portion of the second reflective layer and the step of removing a portion of the third reflective layer in the color image display laminate of the third aspect are simultaneously carried out by irradiating with a laser beam.

The twentieth aspect is a method for producing a color image display laminate, characterized by including a step of removing a portion of all of the reflective layers in the color image display laminate of the fifth aspect by irradiating with a laser beam, and a step of modifying, by irradiating with a laser beam, an area of the laser coloring layer corresponding to a portion where the reflective layers have been continuously removed along the lamination direction from the observation side to the laser coloring layer.

The 21st aspect is a method for producing a color image display laminate of the 20th aspect, characterized in that the step of removing a part of the first reflective layer in the color image display laminate of the 5th aspect and the step of modifying the first reflective layer are carried out simultaneously by irradiating the first reflective layer with a laser beam.

According to the first aspect, the observer can observe a sophisticated color image formed due to the fine irregularities of the multiple fine irregularity layers.

According to the second aspect, the observer can observe both the refined color image formed due to the fine unevenness of the multiple fine unevenness layers and the information of the layers below the multiple fine unevenness layers, or both the refined color image formed due to the fine unevenness of the first fine unevenness layer and the information of the layers below the first fine unevenness layer.

According to the third aspect, a color image is formed due to at least three fine concave-convex layers, so that the observer can observe both a sophisticated color image with a color gamut determined by the colors exhibited by each of the at least three fine concave-convex layers, and information on the layer below the fine concave-convex layers.

According to the fourth aspect, the observer can observe a sophisticated color image that is formed due to the fine irregularities of the multiple fine irregularity layers in combination with the printed layer.

According to the fifth aspect, the viewer can observe a sophisticated color image that is caused by the fine irregularities of the multiple fine irregularity layers, and is further formed in combination with the color of the laser coloring layer.

According to the sixth aspect, the viewer can see a sophisticated color image formed by mixing red, blue, and green colors.

According to the seventh aspect, the viewer can view a sophisticated color image formed by mixing the colors cyan, magenta, and yellow.

According to the eighth aspect, only an observer who knows the observation angle of the color image display laminate can observe any color image, thus achieving a high degree of counterfeit prevention.

According to the ninth aspect, when a viewer shines a light source onto the color image laminate, the viewer can view a color image different from the color image in three dimensions, thereby achieving a unique optical effect.

According to the tenth aspect, it is possible to obtain beautiful color images with little noise.

According to the eleventh aspect, a color image display laminate that is easy to handle during manufacturing can be realized.

According to the twelfth and thirteenth aspects, it is possible to realize a sophisticated color image with excellent gradation depending on whether the reflective layer is present or not.

According to the fourteenth aspect, the observer can observe a sophisticated color image with excellent contrast.

According to the fifteenth and sixteenth aspects, it is possible to realize excellent on-demand processability of the color image display laminate.

According to the seventeenth aspect, the reflective layer in the same area can be removed with a single laser light scan, making it possible to reduce the processing takt time.

According to the 18th aspect, processing for removing the third reflective layer can be performed without significantly changing the laser processing conditions for removing the first and second reflective layers.

According to the 19th aspect, the second reflective layer and the third reflective layer can be removed simultaneously, which makes it possible to reduce the processing takt time.

According to the twentieth aspect, the laser processing conditions for removing the reflective layer and the laser processing conditions for modifying the laser coloring layer can be set separately, and a sophisticated color image can be obtained.

According to the 21st aspect, it is possible to reduce the processing takt time.

FIG. 1 is a plan view showing a medium including a color image display laminate according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view showing one configuration example of the color image display laminate according to the first embodiment of the present invention. FIG. 3 is a side cross-sectional view showing another example of the configuration of the color image display laminate according to the first embodiment of the present invention. FIG. 4 is a side cross-sectional view showing still another configuration example of the color image display laminate according to the first embodiment of the present invention. FIG. 5 is a side cross-sectional view showing still another configuration example of the color image display laminate according to the first embodiment of the present invention. FIG. 6 is a side cross-sectional view showing one configuration example of a color image display laminate according to the second embodiment of the present invention. FIG. 7 is a side cross-sectional view showing another example of the configuration of the color image display laminate according to the second embodiment of the present invention. FIG. 8 is a side cross-sectional view showing still another configuration example of the color image display laminate according to the second embodiment of the present invention. FIG. 9 is a side cross-sectional view showing still another configuration example of the color image display laminate according to the second embodiment of the present invention. FIG. 10A is a side cross-sectional view showing one configuration example of a color image display laminate according to the third embodiment of the present invention. FIG. 10B is a side cross-sectional view showing another configuration example of the color image display laminate according to the third embodiment of the present invention. FIG. 11A is a side cross-sectional view showing yet another configuration example of the color image display laminate according to the third embodiment of the present invention. FIG. 11B is a side cross-sectional view showing yet another configuration example of the color image display laminate according to the third embodiment of the present invention. FIG. 12A is a side cross-sectional view showing a modification of the color image display laminate illustrated in FIG. 11A. FIG. 12B is a side cross-sectional view showing a modification of the color image display laminate illustrated in FIG. 11B. FIG. 13A is a side cross-sectional view showing one configuration example of a color image display laminate according to the fourth embodiment. FIG. 13B is a side cross-sectional view showing one configuration example of the color image display laminate according to the fourth embodiment. FIG. 14A is a side cross-sectional view showing a modified example of a color image display laminate according to the fourth embodiment of the present invention. FIG. 14B is a side cross-sectional view showing a modified example of the color image display laminate according to the fourth embodiment of the present invention. FIG. 15A is a side cross-sectional view showing an example of a configuration of a color image display laminate according to a fifth embodiment of the present invention. FIG. 15B is a side cross-sectional view showing an example of the configuration of the color image display laminate according to the fifth embodiment of the present invention. FIG. 16 is a side cross-sectional view showing examples of the configuration of a color image display laminate according to the fifth embodiment of the present invention. FIG. 17A is a side cross-sectional view showing an example of a configuration of a color image display laminate according to a fifth embodiment of the present invention. FIG. 17B is a side cross-sectional view showing an example of the configuration of the color image display laminate according to the fifth embodiment of the present invention. FIG. 18 is a diagram showing how a color image appears differently depending on the observation location when the fine concaves and convexes provided on the fine concaves and convexes layer are a diffraction grating. FIG. 19 is a side cross-sectional view showing one example of the configuration of a color image display laminate which is a phase modulation element of a computer-generated hologram in which minute projections and recesses form a three-dimensional reconstructed image. FIG. 20 is a perspective view showing an ID card on which a color image display laminate according to each embodiment of the present invention is arranged. FIG. 21 is a plan view showing a schematic view of a part of the color image display laminate as seen from the observer side. FIG. 22 is a plan view showing an ID card medium including a conventional color image display laminate. FIG. 23 is a plan view showing an ID card medium including an improved conventional color image display laminate. FIG. 24 is a conceptual diagram for explaining a facial image formed by two-dimensionally arranging minute monochromatic bodies of red, green and blue. FIG. 25 is a diagram illustrating an example of a method for producing a color image display laminate according to the sixth embodiment. FIG. 26 shows an example of a color image rendered by Dimeta, an enlarged view of a portion of the color image, and a photograph of a layer cross section of a portion of the color image. FIG. 27 is a diagram showing the correlation between the thickness of the reflective layer and the intensity of the laser light. FIG. 28 is a diagram showing the layer structure of a color image display laminate having adhesive layers provided between the layers. FIG. 29 is a diagram showing the layer structure of a color image display laminate in which no adhesive layer is provided between the layers. FIG. 30 is a diagram showing another example of the layer structure of a color image display laminate having an adhesive layer provided between each layer. FIG. 31 is a diagram showing a method for producing the color image display laminate shown in FIG.

Each embodiment of the present invention will be described below with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as in reality. Furthermore, even when the same part is shown, the dimensions and ratios may be shown differently depending on the drawing. In this specification and each drawing, elements similar to those described above with reference to the previous drawings are given the same reference numerals, and detailed explanations will be omitted as appropriate.

Figure 1 is a plan view showing a medium including a color image display laminate according to an embodiment of the present invention.

Figure 1 shows an example in which the color image display laminate 10 is included in an ID card 11, and a facial image of the ID card owner is displayed as a color image.

Below, several configuration examples of the color image display laminate 10 included in the ID card 11 shown in Figure 1 are described.

[First embodiment: Color image display laminate having two fine concave-convex layers]
FIG. 2 is a side cross-sectional view showing one configuration example of the color image display laminate according to the first embodiment of the present invention.

In any embodiment of the color image display laminate of the present invention, at least a plurality of fine unevenness layers c having fine unevenness d that contribute to the presentation of different colors from each other are laminated together, and a plurality of reflective layers r arranged so as to cover the fine unevenness d of each fine unevenness layer c. The fine unevenness d can be a diffraction grating. The fine unevenness d can also be a phase modulation element of a computer-generated hologram that forms a three-dimensional reconstructed image. The fine unevenness d is not limited to a diffraction grating or a phase modulation element, and can be a structure that displays colors by fine unevenness due to phenomena such as diffraction, interference, resonance, refraction, reflection, absorption, and scattering.

In this embodiment, as one embodiment of such a color image display laminate, a color image display laminate 10Z having two fine uneven layers c1 and c2 as exemplified in FIG. 2 will be described. In this specification, the numbers following the letters are used to distinguish the layers.

The color image display laminate 10Z illustrated in FIG. 2 is made up of four layers stacked in order from the viewer k side, which is the upper side in the figure, including a fine concave-convex layer c1, a reflective layer r1, a fine concave-convex layer c2, and a reflective layer r2. In this way, the color image display laminate 10Z includes two fine concave-convex layers c1 and c2.

The fine irregularities d1 provided in the fine irregularity layer c1 and the fine irregularities d2 provided in the fine irregularity layer c2 exhibit optical effects that contribute to the appearance of different colors.

The reflective layers r1 and r2 are arranged so as to cover the fine irregularities d1 and d2, respectively. However, of the reflective layers r1 and r2, a part of the reflective layer r1, which is the reflective layer closer to the observer k, is removed to form the aperture segment j1. Furthermore, although the reflective layer r1 and the aperture segment j1 face the fine irregularity layer c2, they are not in direct contact with each other. In other words, they are not in contact with each other.

When light is incident on the color image display laminate 10Z having such a configuration from the top side in the figure and an observer k observes the reflected light resulting from the reflection of the incident light, the emitted light that has acted at the interface between the fine uneven layer c2 and the reflective layer r2 from the aperture segment j1 reaches the observer k, and the emitted light that has acted at the interface between the fine uneven layer c1 and the reflective layer r1 reaches the observer k from the reflective layer r1.

Figure 3 is a side cross-sectional view showing another example of the configuration of a color image display laminate according to the first embodiment of the present invention.

The color image display laminate 10A shown in FIG. 3 is a modified example of the color image display laminate 10Z and has the same laminate structure as the color image display laminate 10Z. However, the difference is that in the color image display laminate 10Z, the reflective layer r1 and the opening segment j1 are not in direct contact with the fine uneven layer c2, whereas in the color image display laminate 10A, the reflective layer r1 and the opening segment j1 are in direct contact with the fine uneven layer c2. In other words, the reflective layer r1 and the opening segment j1 are in contact with the opposing surfaces of the fine uneven layer c2.

Even in the color image display laminate 10A configured in this way, when light is incident from the top side in the figure, the reflected light observed by the observer k is the emitted light that arrives through the aperture segment j1 and acts at the interface between the fine concave-convex layer c2 and the reflective layer r2, and the emitted light that arrives from the reflective layer r1 and acts at the interface between the fine concave-convex layer c1 and the reflective layer r1.

Figure 4 is a side cross-sectional view showing yet another example of the configuration of a color image display laminate according to the first embodiment of the present invention.

The color image display laminate 10B shown in FIG. 4 is also a modified version of the color image display laminate 10Z, and includes a laminate structure similar to that of the color image display laminate 10Z. Also, similar to the color image display laminate 10Z, the reflective layer r1 and the aperture segment j1 are not in contact with the fine concave-convex layer c2.

However, unlike color image display laminate 10Z, color image display laminate 10B has a printed layer p as the layer furthest from the observer k side. Printed layer p is not in direct contact with the opposing reflective layer r2 and aperture segment j2. In other words, there is no contact.

Furthermore, a portion of the reflective layer r2 is removed to form the aperture segment j2. The aperture segment j2 is positioned so that at least a portion of it faces the aperture segment j1 across the fine concave-convex layer c2. This makes the aperture segments j1 and j2 continuous along the stacking direction (z direction in the figure) from the viewer k side to the printing layer p.

This allows observer k to perceive the color of the printed layer p or observe the information provided (printed) on the printed layer p from above the fine concave-convex layer c1 (the upper side in the figure) through the opening segments j1 and j2.

For example, if the printing layer p is black, the contrast with the color produced by the fine irregularities d1 and d2 increases, which has the effect of improving the visibility of the color image formed by the fine irregularities c1 and c2.

Furthermore, it is sufficient that at least a portion of the opening segment j2 and the opening segment j1 face each other across the fine uneven layer c2. Therefore, the y-direction lengths of the opening segment j2 and the opening segment j1 do not necessarily have to be the same. Similarly, the x-direction lengths of the opening segment j2 and the opening segment j1 do not necessarily have to be the same.

Figure 5 is a side cross-sectional view showing yet another example of the configuration of a color image display laminate according to the first embodiment of the present invention.

The color image display laminate 10C shown in FIG. 5 is a modified version of the color image display laminate 10B, and includes a laminate structure similar to that of the color image display laminate 10B. However, in the color image display laminate 10B, the reflective layer r1 and the aperture segment j1 are not in direct contact with the fine uneven layer c2, whereas in the color image display laminate 10C, the reflective layer r1 and the aperture segment j1 are in direct contact with the fine uneven layer c2. The color image display laminate 10C further includes a laser coloring layer a as the layer furthest from the viewer k. The laser coloring layer a is in direct contact with the opposing reflective layer r2 and aperture segment j2. In other words, they are in contact.

In the color image display laminate 10C, the aperture segments j1 and j2 are continuous along the stacking direction (z direction in the figure) from the observer k side to the laser coloring layer a, so that the observer k can perceive the color of the laser coloring layer a from the upper side of the fine uneven layer c1 (upper side in the figure) through the aperture segments j1 and j2, or can observe the information provided (printed) on the laser coloring layer a.

The laser coloring layer a is modified by irradiating it with laser light. For example, when the laser coloring layer a is modified by irradiating it with laser light to exhibit a black color BK, the density can be varied by changing conditions such as the power, frequency, and scanning speed of the laser light. Also, a portion of the aperture segment j2 can be made dark black and another portion can be made light black, i.e., gray.

[Second embodiment: Color image display laminate having three fine concave-convex layers]
FIG. 6 is a side cross-sectional view showing one configuration example of a color image display laminate according to the second embodiment of the present invention.

In this embodiment, a color image display laminate having three fine concave-convex layers c1, c2, and c3 will be described as one embodiment of a color image display laminate.

The color image display laminate 10D illustrated in FIG. 6 is made up of six layers stacked in order from the viewer k side, which is the upper side in the figure: a fine concave-convex layer c1, a reflective layer r1, a fine concave-convex layer c2, a reflective layer r2, a fine concave-convex layer c3, and a reflective layer r3. In this way, the color image display laminate 10D includes three fine concave-convex layers c1, c2, and c3.

The color image display laminate 10D is a variation of the color image display laminate 10Z, in which a fine concave-convex layer c3 and a reflective layer r3 are further added. The reflective layer r2 and the aperture segment j2 face each other, but are not in direct contact with the fine concave-convex layer c3. In other words, they are not in contact.

Furthermore, the color image display laminate 10D presents blue B to the observer k through the fine irregularities d1, green G to the observer k through the fine irregularities d2, and red R to the observer k through the fine irregularities d3. This allows the three primary colors of RGB to be realized. Similarly, it is also possible to present cyan through the fine irregularities d3, magenta through the fine irregularities d2, and yellow through the fine irregularities d1. This allows the three primary colors of CMYK to be realized.

Of the reflective layers r1, r2, and r3, a part of the reflective layer r1 covering the fine irregularities d1 of the fine irregularity layer c1 closest to the observer k has been removed to form an opening segment j1. Also, of the reflective layers r1, r2, and r3, a part of the reflective layer r2 covering the fine irregularities d2 of the fine irregularity layer c2 next to the fine irregularity layer c1 on the observer k side has also been removed to form an opening segment j2. At least a part of the opening segment j2 and the opening segment j1 face each other across the fine irregularity layer c2. Of the reflective layers r1, r2, and r3, the reflective layer r3 farthest from the observer k side has not been removed at all. Also, although the reflective layer r1 and the fine irregularity layer c2, and the reflective layer r2 and the fine irregularity layer c3 face each other, they are not in direct contact. In other words, they are not in contact.

Figure 7 is a side cross-sectional view showing another example of the configuration of a color image display laminate according to the second embodiment of the present invention.

The color image display laminate 10E shown in FIG. 7 is a modified example of the color image display laminate 10D and has the same laminate structure as the color image display laminate 10D. However, in the color image display laminate 10D, the reflective layer r1 and the opening segment j1 are not in direct contact with the fine uneven layer c2, and the reflective layer r2 and the opening segment j2 are not in direct contact with the fine uneven layer c3, whereas in the color image display laminate 10E, the reflective layer r1 and the opening segment j1 are in direct contact with the fine uneven layer c2, and the reflective layer r2 and the opening segment j2 are in direct contact with the fine uneven layer c3.

Similarly to color image display laminate 10D, color image display laminate 10E can also realize the three primary colors of RGB by presenting blue B to observer k through fine irregularities d1, green G to observer k through fine irregularities d2, and red R to observer k through fine irregularities d3, or the three primary colors of CMYK can also be realized by presenting cyan through fine irregularities d3, magenta through fine irregularities d2, and yellow through fine irregularities d1.

Figure 8 is a side cross-sectional view showing yet another example of the configuration of a color image display laminate according to the second embodiment of the present invention.

The color image display laminate 10F shown in FIG. 8 is a modified version of the color image display laminate 10D and the color image display laminate 10B, and is configured with a printed layer p in the layer furthest from the observer k side of the color image display laminate 10D, as in the color image display laminate 10B. Furthermore, a part of the reflective layer r3 is removed to form an aperture segment j3. The aperture segment j3 is positioned so as to face the aperture segment j2 with the fine concave-convex layer c3 in between. The printed layer p is not in direct contact with the opposing reflective layer r3 and aperture segment j3.

Opening segments j1, j2, and j3 are continuous along the stacking direction (z direction in the figure) from the observer k side to the printed layer p. This allows observer k to perceive the color of the printed layer p from the upper side (upper side in the figure) of the fine uneven layer c1 through the opening segments j1, j2, and j3, or to observe the information provided (printed) on the printed layer p.

The color image display laminate 10F can also realize the three primary colors RGB and CMYK, just like the color image display laminates 10D and 10E.

Figure 9 is a side cross-sectional view showing yet another example of the configuration of a color image display laminate according to the second embodiment of the present invention.

The color image display laminate 10G shown in FIG. 9 is a modified version of the color image display laminate 10E and the color image display laminate 10C, and is configured to include a laser coloring layer a in the layer furthest from the observer k side of the color image display laminate 10E, as in the color image display laminate 10C. Furthermore, as in the color image display laminate 10F, a portion of the reflective layer r3 is removed to form an aperture segment j3. The aperture segment j3 is positioned so as to face the aperture segment j2 with the fine concave-convex layer c3 in between. The laser coloring layer a is in direct contact with the opposing reflective layer r3 and aperture segment j3.

Opening segments j1, j2, and j3 are continuous along the stacking direction (z direction in the figure) from the observer k side to the printed layer p. Therefore, observer k can perceive the color of the laser coloring layer a from the upper side (upper side in the figure) of the fine uneven layer c1 through the opening segments j1, j2, and j3, or can observe the information provided (printed) on the laser coloring layer a.

In the color image display laminate 10G, as in the color image display laminate 10C, the light incident on the opening segment j3 can be mainly contributed by the laser coloring layer a, and if the laser coloring layer a is black BK, for example, the reflectance in this area is reduced.

The color image display laminate 10G can also realize the three primary colors RGB and CMYK, just like the color image display laminates 10D, 10E, and 10F.

[Third embodiment: Color image display laminate (1) having a peeling layer, an adhesive layer, etc.]
FIG. 10A is a side cross-sectional view showing one configuration example of a color image display laminate according to the third embodiment of the present invention.

In this embodiment, a color image display laminate is described that further includes other layers such as a protective layer h, a peeling layer i, an adhesive layer s, and a base layer b in addition to the configuration described in the first and second embodiments.

The color image display laminate 10H illustrated in FIG. 10A is a side cross-sectional view showing the configuration of one example thereof, and from the viewer k side, which is the upper side in the figure, a protective layer h, a peeling layer i1, a fine uneven layer c1, a reflective layer r1, an adhesive layer s1, a peeling layer i2, a fine uneven layer c2, a reflective layer r2, an adhesive layer s2, a printed layer p, and a base layer b are laminated in this order. Although not shown, another layer may be provided between the adhesive layer s2 and the printed layer p.

Both the peeling layer i1 and the adhesive layer s1 may have a lower infrared transmittance than the fine concave-convex layer c1. Similarly, both the peeling layer i2 and the adhesive layer s2 may have a lower infrared transmittance than the fine concave-convex layer c2.

Figure 10B is a side cross-sectional view showing another example of the configuration of a color image display laminate according to the third embodiment of the present invention.

The color image display laminate 10I illustrated in FIG. 10B is laminated in the following order from the viewer k side, which is the upper side in the figure: protective layer h, adhesive layer s1, reflective layer r1, fine uneven layer c1, peeling layer i1, adhesive layer s2, reflective layer r2, fine uneven layer c2, peeling layer i2, printed layer p, and base layer b. Although not shown, another layer may be provided between the peeling layer i2 and printed layer p.

The color image display laminate 10H and the color image display laminate 10I have different effective optical path lengths until the light incident from the observer k side, which is the upper side in the figure, acts on the fine uneven layers c1 and c2. The manufacturing procedures are also different.

Figures 11A and 11B are side cross-sectional views showing yet another example of the configuration of a color image display laminate according to the third embodiment of the present invention.

The color image display laminate 10J shown in FIG. 11A is a modified version of the color image display laminate 10H, in which the two layers of the base layer b at the bottom of the color image display laminate 10H in the figure and the adjacent print layer p are replaced with a single laser coloring layer a.

The color image display laminate 10K shown in FIG. 11B is a modified version of the color image display laminate 10I, in which the two layers of the color image display laminate 10I, the base layer b at the bottom in the figure and the adjacent printed layer p, are replaced with a single laser coloring layer a.

In both color image display laminates 10J and 10K, aperture segment j1 and aperture segment j2 face each other with a layer in between, so that aperture segments j1 and j2 are continuous along the stacking direction (z direction in the figure) from the observer k side to the laser coloring layer a. As a result, when laser light is irradiated from the upper side (upper side in the figure) of color image display laminates 10J and 10K toward the laser coloring layer a, the laser light reaches the laser coloring layer a via aperture segments j1 and j2, and the portion of the laser coloring layer a irradiated by the laser light changes color to black BK.

Figures 12A and 12B are cross-sectional side views showing modified examples of the color image display laminates 10J and 10K illustrated in Figures 11A and 11B.

The color image display laminate 10R illustrated in FIG. 12A includes, from the top in the figure, a peeling layer i3, a fine uneven layer c3, a reflective layer r3, and an adhesive layer s3 between the adhesive layer s2 and the laser coloring layer a of the color image display laminate 10J. The fine uneven layer c3 is provided with fine unevenness d3. Furthermore, a portion of the reflective layer r3 is removed to form an opening segment j3. The opening segment j3 is positioned opposite the opening segment j2, with a layer in between.

The color image display laminate 10S illustrated in FIG. 12B includes, from the top in the figure, an adhesive layer s2, a fine uneven layer c3, a reflective layer r3, and a peeling layer i3 between the peeling layer i2 and the laser coloring layer a of the color image display laminate 10K. The fine uneven layer c3 is provided with fine unevenness d3. Furthermore, a portion of the reflective layer r3 is removed to form an opening segment j3. The opening segment j3 is positioned opposite the opening segment j2, with a layer in between.

In both color image display laminates 10R and 10S, the fine irregularities d1 can present blue B to observer k, the fine irregularities d2 can present green G to observer k, and the fine irregularities d3 can present red R to observer k. This allows the three primary colors of RGB to be realized. Also, for example, it is possible to present cyan with the fine irregularities d3, magenta with the fine irregularities d2, and yellow with the fine irregularities d1. This allows the three primary colors of CMYK to be realized.

In both color image display laminates 10R and 10S, aperture segment j2 and aperture segment j3 face each other, so that aperture segments j1, j2, and j3 are continuous along the stacking direction (z direction in the figure) from the observer k side to the laser coloring layer a. As a result, when laser light is irradiated toward the laser coloring layer a from the upper side (upper side in the figure) of color image display laminates 10R and 10S, the laser light reaches the laser coloring layer a via aperture segments j1, j2, and j3, and the laser coloring layer a in that portion changes color to black BK.

[Fourth embodiment: Color image display laminate (2) having a release layer and an adhesive layer]
The fourth embodiment is also a color image display laminate that further comprises other layers in addition to the configuration described in the first and second embodiments, but unlike the third embodiment, no peeling layer or adhesive layer is provided between the two fine uneven layers c. Figures 13A and 13B are side cross-sectional views showing one configuration example of a color image display laminate according to the fourth embodiment.

The color image display laminate 10L illustrated in FIG. 13A has a configuration in which the adhesive layer s1 and the peeling layer i2 between the fine uneven layer c1 and the fine uneven layer c2 are omitted from the color image display laminate 10J illustrated in FIG. 11A. The fine uneven layer c2, which is in contact with the fine unevenness d2 and the opening segment j2 in the color image display laminate 10J, is also in contact with the fine unevenness d1 and the opening segment j1 in the color image display laminate 10L. For convenience of notation, FIG. 13A shows the portion corresponding to the adhesive layer s2 in FIG. 11A as adhesive layer s1.

The color image display laminate 10M illustrated in FIG. 13B has a configuration in which the peeling layer i1 and adhesive layer s2 between the fine unevenness layer c1 and the fine unevenness layer c2 are omitted from the color image display laminate 10K illustrated in FIG. 11B. The fine unevenness layer c1, which is in contact with the fine unevenness d1 and the opening segment j1 in the color image display laminate 10K, is also in contact with the fine unevenness d2 and the opening segment j2 in the color image display laminate 10M. For convenience of notation, FIG. 13B shows the portion corresponding to the peeling layer i2 in FIG. 11B as peeling layer i1.

Figures 14A and 14B are cross-sectional side views showing a modified example of a color image display laminate according to the fourth embodiment of the present invention.

While the above-mentioned Figs. 13A and 13B show color image display laminates 10L and 10M having two fine concave-convex layers c1 and c2, Figs. 14A and 14B show color image display laminates 10T and 10U having three fine concave-convex layers c1, c2, and c3. In the color image display laminates 10T and 10U, there is no peeling layer i or adhesive layer s between the fine concave-convex layer c2 and the fine concave-convex layer c3.

In the color image display laminate 10T shown in FIG. 14A, the fine concave-convex layer c3 is not only in contact with the fine concave-convex d3 and the opening segment j3, but also in contact with the fine concave-convex d2 and the opening segment j2. Similarly, in the color image display laminate 10U shown in FIG. 14B, the fine concave-convex layer c3 is not only in contact with the fine concave-convex d3 and the opening segment j3, but also in contact with the fine concave-convex d2 and the opening segment j2.

In both color image display laminates 10T and 10U, the fine irregularities d1 can present blue B to observer k, the fine irregularities d2 can present green G to observer k, and the fine irregularities d3 can present red R to observer k. This allows the three primary colors of RGB to be realized. Also, for example, it is possible to present cyan with the fine irregularities d3, magenta with the fine irregularities d2, and yellow with the fine irregularities d1. This allows the three primary colors of CMYK to be realized.

[Fifth embodiment: Color image display laminate (3) having a peeling layer and an adhesive layer]
The fifth embodiment is also a color image display laminate having other layers in addition to the configurations described in the first and second embodiments, but the lamination rules are different from those of the third and fourth embodiments.

Figures 15A, 15B, 16, 17A, and 17B are side cross-sectional views showing examples of the configuration of a color image display laminate according to a fifth embodiment of the present invention.

The color image display laminate 10N illustrated in FIG. 15A has a structure in which the adhesive layer s1 and the fine concave-convex layer c2 in the color image display laminate 10L illustrated in FIG. 13A are swapped in location, and a new peeling layer i2 and adhesive layer s2 are provided below the fine concave-convex layer c2 in the figure. Note that in FIG. 15A, for convenience of notation, the adhesive layer s2 swapped in location with the fine concave-convex layer c2 is shown as adhesive layer s1.

The color image display laminate 10P illustrated in FIG. 15B has a structure in which the adhesive layer s1 and the fine concave-convex layer c1 in the color image display laminate 10M illustrated in FIG. 13B are swapped in location, and a new adhesive layer s1 and peeling layer i1 are provided below the protective layer h in the figure. Note that, for convenience of notation, in FIG. 15B, the adhesive layer s1 that has been swapped in location with the fine concave-convex layer c1 in the color image display laminate 10M is shown as adhesive layer s2.

The color image display laminate 10Q illustrated in FIG. 16 has a structure in which the order of the layers below the peeling layer i1 in the color image display laminate 10K illustrated in FIG. 11B is partially changed. That is, the color image display laminate 10K has the adhesive layer s2, the reflective layer r2, the fine uneven layer c2, and the peeling layer i2 stacked in this order from the top, whereas the color image display laminate 10Q has the peeling layer i2, the fine uneven layer c2, the reflective layer r2, and the adhesive layer s2 stacked from the top.

The color image display laminate 10V illustrated in FIG. 17A is obtained by adding a new peeling layer i, fine uneven layer c, reflective layer r, and adhesive layer s to the color image display laminate 10N illustrated in FIG. 15A. In FIG. 17A, the newly added peeling layer i, fine uneven layer c, reflective layer r, and adhesive layer s are shown as peeling layer i1, fine uneven layer c1, reflective layer r1, and adhesive layer s1.

The layer structure below the peeling layer i2 in the color image display laminate 10V shown in FIG. 17A, i.e., the fine uneven layer c2, the reflective layer r2, the adhesive layer s2, the reflective layer r3, the fine uneven layer c3, the peeling layer i3, and the adhesive layer s3, correspond to the layer structure below the peeling layer i1 in the color image display laminate 10N shown in FIG. 15A, i.e., the fine uneven layer c1, the reflective layer r1, the adhesive layer s1, the reflective layer r2, the fine uneven layer c2, the peeling layer i2, and the adhesive layer s2. Please note that in FIG. 17A, for convenience of notation, the numbers following the letters of the same parts as in FIG. 15A are written as 1 larger than those in FIG. 15A.

The color image display laminate 10W illustrated in FIG. 17B is obtained by adding a new adhesive layer s, reflective layer r, fine concave-convex layer c, and peeling layer i to the color image display laminate 10P illustrated in FIG. 15B. In FIG. 17B, the newly added adhesive layer s, reflective layer r, fine concave-convex layer c, and peeling layer i are shown as adhesive layer s3, reflective layer r3, fine concave-convex layer c3, and peeling layer i3.

The configuration above peel-off layer i2 in color image display laminate 10W corresponds to the configuration above peel-off layer i2 in color image display laminate 10P.

(Materials of each layer described in each embodiment above)
Next, the materials constituting each layer described in each of the above embodiments will be described.

A plastic sheet can be used for the protective layer h. The plastic sheet can be a polyethylene terephthalate (PET) sheet, a polyethylene naphthalate (PEN) sheet, a polypropylene (PP) sheet, a polyvinyl chloride (PVC) sheet, an amorphous polyester (PET-G) sheet, or a polycarbonate (PC) sheet.

When the ID card 11 is used as a personal authentication card or passport, if a PCV sheet, PET-G sheet, PC sheet, or the like is used as the base material, it can be easily integrated by processing with heat or pressure.

The thickness of the protective layer h can be 50 μm or more and 400 μm or less. By making the thickness 50 μm or more, it is easy to handle, and the physical strength is ensured, and it is also easy to suppress wrinkles that occur during stacking. On the other hand, by making the thickness 400 μm or less, the flexibility of the stacked card can be ensured.

The fine uneven layer c can be made of a light-transmitting resin such as a thermoplastic resin, a thermosetting resin, or a photosetting resin. Since the fine uneven layer c is made of a light-transmitting resin, the light incident on the color image display laminate 10 (all the color image display laminates of the above-mentioned embodiments are collectively referred to as the color image display laminate 10) from the protective layer h side can reach the printing layer p and the laser coloring layer a in the area that does not have the reflective layer r, that is, in the path in the z direction where the opening segments j are continuous as described above, by passing through the fine uneven layer c.

The thickness of the fine irregularity layer c can be 0.6 μm or more and 20 μm or less. A thickness of 0.6 μm or more makes it easy to form the fine irregularities d, including holograms, using the roll-to-roll method. Furthermore, by making the thickness 10 μm or less, it is possible to suppress, within an acceptable range, any gaps that may occur at the boundary between areas with and without the fine irregularities d in the protective layer h or the laser coloring layer a when the layers are laminated together.

It is also desirable for the fine concave-convex layer c to have high heat resistance. High heat resistance of the resin material prevents deformation due to heat and pressure when installing the color image display laminate 10 inside. This heat resistance can be obtained by making the fine concave-convex layer d out of a cross-linked polymer.

The reflective layer r is arranged so as to cover at least a portion of the surface of the fine irregularities d of the fine irregularities layer c and to follow the fine irregularities d.

The reflective layer r is made of a light-reflecting metal such as aluminum, copper, silver, gold, or an alloy of these. Among these, aluminum is the most suitable. It may also be made of a multilayer of inorganic vapor deposition layers and metal vapor deposition layers.

The thickness of the reflective layer r is 10 nm or more and 200 nm or less. By making the thickness 10 nm or more, the reflective effect of the reflective layer r can be realized to a degree that is acceptable to the naked eye. On the other hand, by making the thickness 200 nm or less, handling during processing can be made easy. The multiple reflective layers r of the color image display laminate 10 may each be of the same thickness or of different thicknesses. If they are of the same thickness, the reflectance and film quality can be made uniform, so that the optical effect of the fine irregularities d can be made to the same degree. On the other hand, if the thicknesses are different, it functions advantageously in terms of adjusting the degree of removal when removing the reflective layer r.

The adhesive layer s can be mainly made of an adhesive. The adhesive can be a polyester resin, a urethane resin, an acrylic resin, or a polyvinyl chloride resin. The adhesive can contain modifiers such as adhesion promoters, fillers, softeners, heat stabilizers, antioxidants, and mixtures of these.

The thickness of the adhesive layer s can be 0.1 μm or more and 10 μm or less. By making the thickness 0.1 μm or more, the adhesive effect of the adhesive can be fully exerted. On the other hand, by making the thickness 10 μm or less, the gap that may occur at the boundary between the area with the adhesive layer s and the area without the adhesive layer s can be kept within an acceptable range.

If the thickness of the adhesive layer s were to exceed 10 μm, this gap would become larger, not only causing peeling between the protective layer h and the adhesive layer s, but also making the boundary area unnaturally noticeable and impairing the appearance of the color image display laminate 10.

For the printing layer p, inorganic pigments, organic pigments, or dye inks can be used. When dye inks are used, the printing layer p soaks into the support and becomes one with the support. Infrared emitting inks can also be used. The image can be confirmed by irradiating it with infrared light.

The printing layer p can be made of a fluorescent pigment that develops color through photoluminescence. In addition to fluorescent pigments that emit light in the visible range, fluorescent pigments that are colorless under normal light and emit strong light under ultraviolet light such as black light can also be used. A phosphorescent material that emits a residual light even after the light irradiation is stopped can also be used.

The printing layer p may be formed using a predetermined printing method. Examples of printing methods include offset printing, gravure printing, screen printing, flexographic printing, inkjet printing, and thermal transfer printing.

As with the protective layer h, various plastic sheets can be used for the laser coloring layer a. For the purpose of lamination integration processing, it is preferable to use a sheet whose main component is the same material as the protective layer h.

The thickness of the laser coloring layer a can be approximately the same as that of the protective layer h, and for the same reasons as the protective layer h, it can be 50 μm or more and 400 μm or less.

The laser coloring layer a can also be a plastic sheet that has the property of being carbonized when irradiated with a laser beam having a specified wavelength. Alternatively, the laser coloring layer a can be made of polycarbonate as the main raw material, with an energy absorber that absorbs the laser beam as an additive.

As with the protective layer h and the laser coloring layer a, various plastic sheets can be applied to the base layer b. By applying a sheet whose main component is the same material as the protective layer h and the laser coloring layer a to the base layer b, wrinkles that may occur when laminating and integrating the layers by applying heat and pressure can be suppressed, and processing is also easy because the resin flows when thermoplasticized at the same temperature and pressure.

Next, we will explain the fine irregularities d.

The fine irregularities d can be realized by a diffraction grating or a phase modulation element.

When the fine irregularities d are diffraction gratings, the fine irregularities d may be diffraction gratings. By providing diffraction gratings with different spatial frequencies in each fine irregularity layer c and combining them, it is possible to adjust the intensity of each wavelength of light that reaches the observer k. The diffraction grating may be of either a binary type or a blazed type.

The following describes the spatial frequency and intensity distribution of the emitted light when white light is incident on a diffraction grating with a certain spatial frequency. First, the diffraction grating is described for cases where the incident light is incident on the color image display laminate 10 from the observer k side at an angle of 45 degrees, and the observation angle is 90 degrees from the observer k side to the color image display laminate 10 (directly above), and the spatial frequency is, for example, 1100 lines/mm, 1300 lines/mm, and 1500 lines/mm.

In this case, observer k receives a distribution of emitted light centered on the diffracted wavelength corresponding to each spatial frequency. If the area ratio of the diffraction grating is arbitrary, observer k can observe a full-color image.

Figure 18 shows how a color image appears differently depending on the observation location when the fine irregularities provided in the fine irregularity layer are diffraction gratings.

As shown in FIG. 18, the intensity of light arriving from the diffraction grating of each fine irregularity d varies depending on the observation location, so that observer k can perceive any color image by changing the observation location. At an observation angle where diffracted light does not reach observer k, it is difficult to perceive a color image.

When the fine irregularities d are phase modulation elements, the fine irregularities d may be phase modulation elements. The phase modulation elements may be computer-generated holograms that form a reconstructed image and function as spatial phase modulators. The phase modulation elements may also be Fourier transform holograms or Fresnel transform holograms.

Figure 19 is a side cross-sectional view showing an example of the configuration of a color image display laminate, which is a phase modulation element of a computer-generated hologram in which fine irregularities form a three-dimensional reconstructed image.

In the color image display laminate 10X shown in FIG. 19, the height of the fine projections and recesses d of the phase modulation element is constant in each of the fine projections and recesses layers c1, c2, and c3.

In other words, in the fine unevenness layer c1, the depth of the concaves or convexities in the fine unevenness d1 (which is also the height from the bottom surface to the top surface) is unified to a constant value β. This allows the fine unevenness layer c1 to express a unique color.

In addition, in the fine unevenness layer c2, the depth of the concaves or convexities in the fine unevenness d2 (which is also the height from the bottom surface to the top surface) is unified to a constant value α. Unlike β, α has the relationship α>β. This allows the fine unevenness layer c2 to express a unique color that is different from the fine unevenness layer c1.

Furthermore, in the fine unevenness layer c3, the depth γ of the concave or convex portions in the fine unevenness d3 (which is also the height from the bottom surface to the top surface) is unified to a constant value γ. Unlike α and β, γ has the relationship α>β>γ. This allows the fine unevenness layer c3 to express a unique coloration that is different from the fine unevenness layers c1 and c2.

For example, typical depth values are α = 250 nm, β = 200 nm, and γ = 150 nm, so that the depth α corresponds to the color of green G, the depth β corresponds to the color of blue B, and the depth γ corresponds to the color of red R. However, these values differ depending on the refractive index of the fine concave-convex layer c.

Figure 20 is a perspective view showing an ID card on which a color image display laminate according to each embodiment of the present invention is arranged.

In the color image display laminate 10 arranged on the ID card 11, a computer-generated hologram phase modulation element that forms a three-dimensional reproduced image is applied as the fine irregularities d. In this case, as shown in FIG. 20, when light is irradiated onto the color image display laminate 10 from a point light source 30 on the front side of the ID card 11, an observer k can visually recognize a reproduced image 31 reproduced by the phase modulation element.

The reconstructed image 31 is realized mainly by a phase modulation element having a reflective layer r. On the other hand, on the surface of the color image display laminate 10, a color facial image can be confirmed by the areas having the reflective layer r of each layer. The principle by which a color facial image can be confirmed is explained using Figure 21.

Figure 21 is a plan view showing a schematic representation of a portion of the color image display laminate as seen from the observer's side.

The color image display laminate 10 shown in FIG. 21 is a plan view showing an example of a pixel arrangement. Reflective layers rB, rG, and rR are seen in each pixel 40. Reflective layers rB, rG, and rR correspond to the previously described reflective layers r1, r2, and r3. The black color BK of the laser coloring layer a is also seen in each pixel 40.

By adjusting the area size of these reflective layers rB, rG, and rR in the pixel 40 and the black BK of the laser coloring layer a, any color can be expressed for each pixel 40. The color image display laminate 10 can display any color image by combining these pixels 40.

(First method for producing a color image display laminate)
Next, a first method for producing a color image display laminate will be described.

The first manufacturing method is carried out by multiple transfer and is suitable for manufacturing a color image display laminate having a configuration such as that shown in Figures 10A, 10B, 11A, 11B, 12A, and 12B. Below, the first manufacturing method will be described with reference to Figure 11B as a representative example.

The color image display laminate 10K shown in FIG. 11B has, as precursors, a laminate T1 consisting of a protective layer h, a laser coloring layer a, an adhesive layer s1, a reflective layer r1, a fine concave-convex layer c1, and a peeling layer i1, and a laminate T2 consisting of an adhesive layer s2, a reflective layer r2, a fine concave-convex layer c2, and a peeling layer i2.

When producing the color image display laminate 10K, first, the laminate T2 is transferred to the laser coloring layer a. Then, the laminate T1 is transferred to the laminate T2. Then, the protective layer h and the transferred laser coloring layer a are heat-pressure laminated to produce the color image display laminate 10K.

By performing such copying multiple times, Figures 10A, 10B, 12A, and 12B can be similarly produced.

(Second method for producing a color image display laminate)
Next, a second method for producing a color image display laminate will be described.

The second manufacturing method is carried out by embossing with a transfer foil, and is suitable for manufacturing color image display laminates such as those shown in Figures 13A, 13B, 14A, and 14B. The second manufacturing method will be described below with reference to Figure 13A as a representative example.

The color image display laminate 10L shown in FIG. 13A has, as a precursor, a protective layer h, a laser coloring layer a, and a laminate T3 consisting of a peeling layer i1, a fine uneven layer c1, a reflective layer r1, a fine uneven layer c2, a reflective layer r2, and an adhesive layer s1.

When producing the color image display laminate 10L, first, a peeling layer i1 and a molding layer are applied to a substrate to produce the laminate T3. Furthermore, a stamper having fine irregularities d1 is used to transfer the fine irregularities d1 to the molding layer, thereby obtaining a fine irregularity layer c1 having the fine irregularities d1. A reflective layer r1 is then provided on the fine irregularity layer c1. After that, a molding layer is further provided on the reflective layer r1. Furthermore, a stamper having fine irregularities d2 is used to transfer the fine irregularities d2 to the molding layer, thereby obtaining a fine irregularity layer c2. Finally, the reflective layer r2 and the adhesive layer s1 are laminated on the fine irregularity layer c2 to produce the laminate T3.

Next, the laminate T3 is transferred to the laser coloring layer a. The protective layer h and the transferred laser coloring layer a are then heat-pressurized laminated to produce the color image display laminate 10L.

(Third method for producing a color image display laminate)
Next, a third method for producing a color image display laminate will be described.

The third manufacturing method is carried out by alignment dry lamination with transfer foil integration, and is suitable for manufacturing color image display laminates such as those shown in Figures 15A, 15B, 17A, and 17B. The third manufacturing method will be described below with reference to Figure 15A as a representative example.

The color image display laminate 10N shown in FIG. 15A has, as precursors, a protective layer h, a laser coloring layer a, a laminate T4 consisting of a peeling layer i1, a fine uneven layer c1, a reflective layer r1, and an adhesive layer s1, and a laminate T5 consisting of a reflective layer r2, a fine uneven layer c2, a peeling layer i2, and an adhesive layer s2.

When producing the color image display laminate 10N, first, a release layer i1 and a molding layer are applied to a substrate to produce the laminate T4. A stamper having a fine irregularity d1 is used to transfer the fine irregularity d1 to the molding layer, thereby obtaining a fine irregularity layer c1 having the fine irregularity d1. A reflective layer r1 is then provided on the fine irregularity layer c1 to produce the laminate T4.

To produce laminate T5, a release layer i2 and a molding layer are applied to another substrate. A stamper with fine irregularities d2 is used to transfer the fine irregularities d2 to the molding layer, obtaining a fine irregularity layer c2 with fine irregularities d2. A reflective layer r2 is then provided on the fine irregularity layer c2 to produce laminate T5.

Next, laminate T4 and laminate T5 are integrated with adhesive layer s1. This can be done, for example, by the dry lamination method.

Then, the laminates T4 and T5 are transferred to the laser coloring layer a. Then, the protective layer h and the transferred laser coloring layer a are heat-pressure laminated. Finally, the base material on the side of the fine uneven layer c2 is peeled off, and an adhesive layer s2 is applied from above the release layer i2 to produce the color image display laminate 10N.

(Fourth method for producing a color image display laminate)
Next, a fourth method for producing a color image display laminate will be described.

The fourth manufacturing method is carried out by aligning and thermally laminating the transfer foil, and is suitable for manufacturing a color image display laminate 10Q as shown in FIG. 16. Therefore, the fourth manufacturing method will be described below with reference to FIG. 16.

The color image display laminate 10Q shown in FIG. 16 has, as precursors, a laminate T6 consisting of a protective layer h, a laser coloring layer a, an adhesive layer s1, a reflective layer r1, a fine uneven layer c1, and a peeling layer i1, and a laminate T7 consisting of a peeling layer i2, a fine uneven layer c2, a reflective layer r2, and an adhesive layer s2.

When producing the color image display laminate 10Q, first, the laminate T6 is transferred to and integrated with the protective layer h. The laminate T7 is then transferred to and integrated with the laser coloring layer a. After that, the two are further integrated by heat and pressure lamination to produce the color image display laminate 10Q.

(Dimeta processing)
In any of the above-mentioned manufacturing methods 1 to 4, the color image display laminate 10 having the aperture segment j with a part of the reflective layer r removed is provided with the aperture segment j by removing the part of the reflective layer r by dimetrization. The dimetrization may be performed after the layers are integrated or before the layers are integrated.

The dimension can be adjusted by irradiation with a laser beam. A fixed laser such as a _YVO4 laser or a YAG laser having a wavelength of 1064 nm can be used as the laser beam. Not limited to an infrared laser, a visible light laser or an ultraviolet light laser can also be used.

Such a laser beam can be applied from the protective layer h side to remove the reflective layer r.

By adjusting the laser scanning speed, step width, and output repetition frequency, it is possible to adjust the individual pulse marks in the laser scanning direction in the aperture segment j of the reflective layer r, as well as the degree of overlap between the pulse marks.

By adjusting the pulse energy and peak power of the laser irradiated to each reflective layer r in the color image display laminate 10, it is possible to simultaneously remove parts of the multiple reflective layers r. It is also possible to selectively remove only the reflective layer r on the laser irradiated side, leaving the reflective layer r on the back side.

For example, in the color image display laminate 10R shown in FIG. 12A, it is possible to simultaneously remove parts of the multiple reflective layers r1, r2, and r3, or selectively remove only the reflective layer r1 on the laser irradiation side and leave the reflective layer r2 on the back side without removing it. Also, by irradiating the reflective layer r3 with a laser through the opening segment j2 from which the reflective layer r2 has been removed, it is possible to simultaneously remove parts of the multiple reflective layers r2 and r3, or selectively remove only the reflective layer r2 on the laser irradiation side and leave the reflective layer r3 on the back side without removing it. It is also possible to perform the laser irradiation multiple times, such as removing the opening segment j1 by the first laser irradiation, removing the opening segment j2 by the second laser irradiation, and removing the opening segment j3 by the third laser irradiation.

The transmittance of the laser light may be controlled within the color image display laminate 10 in order to adjust the pulse energy and peak power of the laser irradiated to each reflective layer r for each of the multiple reflective layers r (e.g., reflective layers r1, r2, and r3).

In addition, in order to control the transmittance of laser light within the color image display laminate 10, a material that attenuates light in the wavelength range of the laser may be used. In order to absorb heat, an infrared absorbing dye or a heat insulating material such as hollow silica may be used.

By adjusting the aperture segment j of each reflective layer r in the color image display laminate 10, the intensity of the light reflected by each reflective layer r that reaches the observer k can be changed, so that the observer k can perceive each color realized by reflection at each reflective layer r as a mixed color depending on the two-dimensional amount of the reflective layer r.

When the aperture segments j from which the reflective layer r has been removed are continuous in the z direction, and if the printed layer p is the layer furthest from the observer k in the z direction, the observer k can observe the color due to the printed layer p. In addition, in this case, if there is a laser coloring layer a instead of a printed layer p, the area of the laser coloring layer a that is sufficiently irradiated with the laser beam is modified by the irradiation of the laser beam, and the observer k can observe the color that is developed by the modification from that area. This color is typically black BK.

The process of removing a portion of the reflective layer r and the process of modifying it can also be carried out simultaneously by irradiating it with a laser beam.

For example, in the color image display laminate 10R shown in FIG. 12A, the process of removing a portion of the reflective layer r3 and the process of modifying a portion of the laser coloring layer a can be carried out simultaneously.

In addition, if the fine irregularities d provided on the fine irregularity layer c are phase modulation elements, the originally designed reconstructed image 31 can be obtained with a higher expected value, regardless of the aperture segment j of the reflective layer r. This is because the reconstructed image 31 is formed from a phase modulation element provided on the entire surface of the fine irregularity layer c.

(Example)
Next, an embodiment of a method for producing a color image display laminate will be described.

First, a computer was used to calculate a phase modulation element for forming the desired reconstructed image 31 by irradiating a point light source 30. Next, drawing pattern data obtained using the calculation results was electron-beam drawn on two resist substrates with two different drawing energy amounts. After that, a development process was performed to produce identical phase modulation elements with different heights of the fine irregularities d. Next, nickel was evaporated onto the resist substrate, a seed layer was applied, and a nickel electroforming plate was produced by nickel electroforming.

Next, a film made of a PET substrate coated with a release layer i and a layer that will become the precursor of the fine uneven layer c was pressed against the prepared nickel electroforming plate under heat, and the phase modulation element of the nickel electroforming plate was transferred to the precursor layer. Furthermore, an aluminum reflective layer r was provided on the fine uneven layer c by vacuum deposition. In this way, two types of film, A and film B, were prepared. An adhesive layer s was applied to the aluminum surface of each.

Next, of the films prepared on the polycarbonate substrate that would become the laser coloring layer a, film A was grounded from the adhesive layer s side, and transferred by applying heat and pressure. The PET substrate was then peeled off. Furthermore, another type of film B was prepared and grounded from the adhesive layer s side to the exposed peeling layer i, and transferred by applying heat and pressure. The PET substrate was then peeled off.

The polycarbonate substrate with the transferred laser coloring layer a was laminated with a polycarbonate substrate with protective layer h. Furthermore, a colored base layer, laser coloring layer a, and protective layer h were laminated in that order on the side of the laser coloring layer a, and then heat and pressure were applied to fuse them together to form a card shape.

The above card was irradiated with 1064 nm infrared pulsed laser light. During irradiation, the laser output, Q-switch frequency, and scanning speed were adjusted.

Under the adjusted irradiation conditions, the reflective layer r of film B was removed, but the reflective layer r of film A was not removed.

When observing the ID card 11 produced as described above, an image was observed that was a mixture of the colors exhibited by film A and film B.

Sixth embodiment
A method for producing a color image display laminate according to the sixth embodiment of the present invention will be described.

First, the necessity of the method for producing a color image display laminate according to the sixth embodiment will be explained using Figures 22 to 24.

Figure 22 is a plan view showing an ID card medium including a conventional color image display laminate.

Figure 23 is a plan view showing an ID card medium including an improved conventional color image display laminate.

As shown in FIG. 22, a conventional ID card medium 11A displays two pieces of personal information, consisting of a large amount of text information M and a facial image X. This personal information is sometimes printed using a special method to prevent tampering. However, despite this countermeasure, tampering cannot be completely prevented, and further countermeasures are needed.

As shown in FIG. 23, the ID card medium 11B, which is equipped with further tamper-proofing measures, has a facial image Y printed in a special way in addition to the normal facial image X, and is drawn using a transfer inkjet method or other method using materials such as a hologram or special ink.

Figure 24 is a conceptual diagram to explain a facial image created by arranging tiny monochromatic bodies of red, green, and blue in a two-dimensional manner.

As shown in Figure 24, facial image X is formed by arranging tiny monochromatic bodies of red, green, and blue R, G, and B two-dimensionally. These tiny monochromatic bodies R, G, and B satisfy this condition because a group of red, green, and blue constitutes one pixel. Facial image X is made up of hundreds to thousands of such pixels vertically and horizontally. One tiny monochromatic body is about several tens to several hundreds of μm in size.

In this way, in many cases, facial image X is microscopically composed of red, green, and blue monochromatic bodies R, G, and B arranged two-dimensionally. Until now, the mainstream transfer method was an image formation method in which a separate monochromatic body was formed for each color. However, in recent years, drawing techniques using lasers have become mainstream, and this method involves irradiating the red, green, and blue monochromatic bodies R, G, and B with a laser to erase the color, or providing a cover layer on the red, green, and blue monochromatic bodies R, G, and B, and then using a laser to remove the cover layer on the monochromatic bodies required for forming the face.

However, with this method, the R, G, and B monochromatic particles must be accurately removed, so the irradiation position precision must be significantly smaller than that of the R, G, and B monochromatic particles.

Normally, printers make the transport path for the print medium about 1 mm larger than the size of the print medium to prevent jams when the print medium is transported. This means that the transport position accuracy of the print medium will include an error of about 1 mm. Transporting the medium with this accuracy falls far short of the required position accuracy. For this reason, it is necessary to place a mark on the print medium to check the print position, and always check the media position by reading the mark before printing.

In light of this background, in the method for producing a color image display laminate according to this embodiment, instead of the planar arrangement of R, G, and B micro-monochrome elements, red, green, and blue panels are laminated, and the necessary micro-monochrome elements are generated sequentially by irradiating them with laser light.

Figure 25 is a diagram illustrating an example of a method for producing a color image display laminate according to the sixth embodiment.

As shown in FIG. 25(a), the color image display laminate 400 is formed by laminating a diffraction grating (blue) 421, a diffraction grating (green) 422, and a diffraction grating (red) 423.

In such a color image display laminate 400, when a red monochromatic micro-body is required, the outermost red layer is used as is, as shown in FIG. 25(a).

On the other hand, if a green monochromatic micro-body is required, the red reflective layer 423a is removed using a focused laser 424 in which laser light 425 is focused by a lens 426, as shown in FIG. 25(b).

If a blue monochromatic micro-particle is required, the condensed laser 424 is used to remove the red reflective layer 423a as well as the green reflective layer 422a, as shown in FIG. 25(c).

This subtraction process creates the required red, green and blue colors to combine the required colors within a pixel.

For example, if white is required, the three elemental lights of red, green, and blue are required within pixel 42, as shown in FIG. 25(d), so tiny monochromatic bodies 42r, 42g, and 42b of red, green, and blue are created and then white is synthesized.

In this way, when the three reflective layers 423a, 422a, and 421a are removed (demetalized) by the focused laser 424 in order from the first reflective layer 423a, the damage caused by demetalization to the upper reflective layers accumulates as the reflective layers move to the lower layers, such as the second reflective layer 422a and the third reflective layer 421a. Therefore, the thickness of the lower reflective layer is set to be thicker than the thickness of the upper reflective layer. For example, in FIG. 25, the thickness of the reflective layer 423a of the first layer 423 (red) is 50 nm, the thickness of the reflective layer 422a of the second layer 422 (green) is 50 nm, and the thickness of the reflective layer 421a of the third layer (blue) is 100 nm. That is, the third reflective layer is thicker than the first and second layers. In this case, the first and second layers may be the same thickness.

The second layer may be thicker than the first layer. The first layer may be thicker than the second layer. The difference in thickness between the first and second layers may be 20 nm or less. With this difference, the first and second layers can be selectively removed with a laser. The third layer may be, for example, 30 nm or more thicker than the second layer, but not more than five times as thick as the second layer. If it is 30 nm or more thick, damage to the printing layer can be prevented. By making it more than five times thicker, the third layer can be formed at a practical cost.

Figure 26(a) shows an example of a color image drawn by removing (demetrizing) the reflective layers 423a, 422a, and 421a in the order of the reflective layers 423a, 422a, and 421a with a focused laser 424, as shown in Figure 25. Figure 26(b) is an enlarged view of a portion of the color image in Figure 26(a). Figure 26(c) is a photograph of a cross section of a portion of the color image in Figure 26(a). In the conventional technology, as shown in Figure 24, it is necessary to remove the monochromatic bodies as designed from the minute monochromatic bodies R, G, and B arranged two-dimensionally, so the alignment accuracy of the laser light irradiation needs to be significantly smaller than the size of the minute monochromatic bodies R, G, and B.

In contrast, the manufacturing method according to this embodiment does not require the preparation of a monochromatic body on the medium in advance, and therefore can be achieved without requiring high accuracy in aligning the irradiation position.

Example 1 of the sixth embodiment
Example 1 of the sixth embodiment will be described.

Here, we explain the relationship between the thickness of the reflective layer and the laser light intensity.

As shown in FIG. 25(a), in the case of a color image display laminate 400 in which a diffraction grating (blue) 421, a diffraction grating (green) 422, and a diffraction grating (red) 423 are laminated, as described above, it is necessary to remove only the reflective layer 423a of the first layer 423 and only the reflective layer 422a of the second layer 422.

Figure 27 shows the correlation between the thickness of the reflective layer and the laser light intensity that was verified in this regard.

The horizontal axis of Figure 27 shows the laser light intensity, and the vertical axis shows the average radius of the reflective layer removal area at the irradiation position.

Also, 431 shows a sample with a reflective layer thickness of 50 nm, 432 shows a sample with a reflective layer thickness of 100 nm, and 433 shows a sample with a reflective layer thickness of 150 nm, and the relationship between the laser light intensity and the average radius of the reflective layer removal area when the laser light is irradiated.

For example, if the target radius of the removal area is 50 μm, then if the reflective layer is 50 nm, a laser light intensity of approximately 22 μJ is required, if it is 100 nm, a laser light intensity of 30 μJ is required, and if it is 150 nm, a laser light intensity of 34 μJ is required. The reflective layer cannot be removed below these irradiation conditions.

As mentioned above, the lower the reflective layer, the more damage caused by dimension to the reflective layer on the higher layer side accumulates, so the thickness of the lower reflective layer is set to be thicker than that of the higher reflective layer. Here, the thickness of the reflective layer 423a of the first layer 423 is 50 nm, the thickness of the reflective layer 422a of the second layer 422 is 100 nm, and the thickness of the reflective layer 421a of the third layer 421 is 150 nm. In this case, from the results shown in FIG. 27, first, 22 μJ of laser light is irradiated to the places where the reflective layer of the first layer 423, the second layer 422, and the third layer 421 is to be removed, then 30 μJ of laser light is irradiated to the places where the reflective layer of the second layer 422 and the third layer 421 is to be removed, and finally, 32 μJ of laser light is irradiated to the places where the reflective layer of the third layer 421 is to be removed, thereby realizing the arrangement of red, green, and blue as designed.

Example 2 of the sixth embodiment
Example 2 of the sixth embodiment will be described.

Here, we will explain the case where an adhesive layer is provided between each layer 421, 422, and 423 in order to verify the effect of increasing the adhesion between each layer 421, 422, and 423 of the color image display laminate 400.

Figure 28 shows the layer structure of a color image display laminate with an adhesive layer between each layer.

Figure 29 shows the layer structure of a color image display laminate prepared for comparison, in which no adhesive layer is provided between each layer.

In the color image display laminate 400A shown in FIG. 28, an adhesive layer 434a is provided between the diffraction gratings 423 and 422, and an adhesive layer 434b is provided between the diffraction gratings 422 and 421. Both adhesive layers 434a and 434b are made of JER1004 and JER1004+Vylon270, and have a layer thickness of 2 μm.

When laser light was irradiated onto the color image display laminate 400A having such a configuration in order to remove the reflective layer 423a, it was possible to selectively remove only the reflective layer 423a without removing the lattice layer 423b, as shown in region W in Figure 28.

On the other hand, when the color image display laminate 400 shown in FIG. 29 was irradiated with laser light to remove the reflective layer 423a, not only the reflective layer 423a but also the lattice layer 423b was removed, as shown in region W in FIG. 29.

In this way, it was confirmed that when adhesive layers 434a and 434b are provided, the adhesion between the layers 421, 422, and 423 is increased, and the reflective layer alone can be selectively removed by irradiating the laser light without removing the lattice layer.

In addition, the layer structure of the color image display laminate with an adhesive layer between each layer can be configured as shown in FIG. 30 in addition to the example shown in FIG. 28.

The color image display laminate 400B having the layer structure shown in FIG. 30 is composed of a first layer 423, a second layer 422, a third layer 421, and a transparent protective layer 450 laminated in this order from the bottom in the figure.

The first layer 423 is made up of a transparent polycarbonate base material 423d, an adhesive layer 423b, a reflective layer 423a made of aluminum or the like, and a holographic layer (red) 423c, laminated in this order from the bottom in the figure.

The second layer 422 is made up of a transparent polycarbonate base material 422d, an adhesive layer 422b, a reflective layer 422a made of aluminum or the like, and a holographic layer (green) 422c, laminated in this order from the bottom in the figure.

With this layer structure, the holographic layer (red) 423c of the first layer 423 is protected by the transparent polycarbonate substrate 422d of the second layer 422.

The third layer 421 is made up of a transparent polycarbonate base material 421d, an adhesive layer 421b, a reflective layer 421a made of aluminum or the like, and a holographic layer (blue) 421c, laminated in this order from the bottom in the figure.

With this layer structure, the holographic layer (green) 422c of the second layer 422 is protected by the transparent polycarbonate substrate 421d of the third layer 421.

Furthermore, a transparent protective layer 450 is laminated on the third layer 421, so that the holo layer (blue) 421c is protected by the transparent protective layer 450 made of, for example, a polycarbonate base material. The stacking order of the holo layer (blue), holo layer (green), and holo layer (red), i.e., the top-bottom order, is not particularly limited. However, if the holo layer (blue), which is difficult to see, is placed at the bottom in this stacking order, i.e., the side farthest from the observer, on the laser coloring layer side, visibility is easily improved.

As shown in FIG. 31(a), such a color image display laminate 400B is prepared by preparing a three-color transfer film 500 in which an adhesive layer 501, a reflective layer 502 made of aluminum or the like, a holo layer 503, a peeling layer 504, and a PET substrate 505 are laminated in this order from the bottom side in the figure, and transferring the three colors separately to polycarbonate substrates 421d, 422d, and 423d as shown in FIG. 31(b), thereby forming an adhesive layer 423b, a reflective layer 502, and a PET substrate 505 laminated in this order on the polycarbonate substrate 423d. The color-developing layer is made of three colors: a color-developing layer (red) made of 423a and holo layer 423c; a color-developing layer (green) made of adhesive layer 422b, reflective layer 422a, and holo layer 422c laminated in order on polycarbonate substrate 422d; and a color-developing layer (blue) made of adhesive layer 421b, reflective layer 421a, and holo layer 421c laminated in order on polycarbonate substrate 421d. As shown in FIG. 31(c), these three color-developing layers are integrated to produce the color-developing layer. Note that the protective layer is omitted in FIG. 31, but a protective layer may be provided as in FIG. 1.

(Conditions for carrying out Examples 1 and 2 of the sixth embodiment)
The implementation conditions for Examples 1 and 2 of the sixth embodiment are as follows.

The diffraction gratings 421, 422, and 423 were constructed by providing a peel layer (MCS5041, 1 μm thick), a hologram layer (VH311A main material, VH311B hardener, 0.7 μm), and a reflective layer (aluminum, 50, 100, and 150 nm thick) on a base material (PET, 12 μm thick). These were stacked as shown in FIG. 25(a) to form a color image display laminate 400, which was then irradiated with laser light 425 while fixed to a polyvinyl chloride card.

The best mode for carrying out the present invention has been described above with reference to the attached drawings, but the present invention is not limited to such a configuration. Within the scope of the technical ideas of the invention in the claims, a person skilled in the art may conceive of various modifications and amendments, and it is understood that such modifications and amendments also fall within the technical scope of the present invention.

The color image display laminate of the present invention can provide on-demand information such as images by selectively removing the reflective layer. In addition, it is possible to reproduce color images of the desired hue, making it possible to realize sophisticated color images.

In particular, it can be used to protect the value of personal authentication media such as passports, driver's licenses, and ID cards that contain individual information.

10, 10A to 10N, 10P to X, 10Z... Color image display laminate,
11. ID card,
11A, 11B... ID card medium,
30. Point light source,
31. Reconstructed image,
40, 42...pixels,
42b: Micro-monochrome (blue), 42g: Micro-monochrome (green),
42r: Small monochromatic body (red),
400, 400A, 400B... Color image display laminate,
421: Diffraction grating (blue),
421a...Reflective layer (blue),
422: Diffraction grating (green),
422a: Reflective layer (green),
423: Diffraction grating (red),
423a: Reflective layer (red),
424: Focused laser,
425: Laser light,
426: Lens,
431: Sample (reflective layer thickness 50 nm),
432: Sample (reflective layer thickness 100 nm),
433: Sample (reflective layer thickness 150 nm),
434a, 434b...adhesive layer,
450: Transparent protective layer,
500: Transfer film,
501: adhesive layer,
502: Reflective layer;
503: Holo layer,
504: Release layer,
505: PET base material,
a. Laser coloring layer,
B: Micromonochrome (blue),
BK: Black,
b. Base layer,
c, c1 to c3 . . . fine uneven layer,
d, d1 to d3: fine irregularities,
G: Small monochromatic body (green),
h. Protective layer,
i, i1 to i3 . . . peeling layer,
j, j1 to j3 . . . aperture segments,
k. Observer,
M: Text information,
p: Printing layer,
R: Small monochromatic body (red),
r, r1 to r3, rB, rG, rR...reflective layers,
s, s1 to s3 . . . adhesive layer,
T1 to T7: Laminated bodies,
W: area,
X, Y... face image,
α, β, γ...depth

Claims (21)

at least,
A plurality of fine concave-convex layers provided with fine concave-convex portions that contribute to the appearance of different colors from each other;
a plurality of reflective layers arranged so as to cover the fine projections and recesses of the plurality of fine projections and recesses of the plurality of fine projections and recesses;
A color image display laminate, characterized in that a first aperture segment is formed by removing a portion of a first reflective layer among the plurality of reflective layers that is closest to an observation side on which the color display laminate is observed. forming a second aperture segment by removing a portion of a second reflective layer, which is next closest to the observation side after the first reflective layer, among the plurality of reflective layers;
2. The color image display laminate of claim 1, characterized in that at least a portion of the first opening segment and at least a portion of the second opening segment are opposed to each other across a second fine concavo-convex layer among the plurality of fine concavo-convex layers, the second fine concavo-convex layer having fine concavo-convex portions covered by the second reflective layer. The plurality of micro-relief layers and the plurality of reflective layers each include at least three layers,
forming a third aperture segment by removing a portion of a third reflective layer, which is next closest to the observation side after the second reflective layer, among the plurality of reflective layers;
3. The color image display laminate of claim 2, wherein at least a portion of the second opening segment and at least a portion of the third opening segment are opposed to each other across a third fine concavo-convex layer among the plurality of fine concavo-convex layers, the third fine concavo-convex layer having fine concavo-convex portions covered by the third reflective layer. Further comprising a printed layer as the layer furthest from the observation side,
4. The color image display laminate according to claim 1, wherein a fourth opening segment in which the reflective layer has been removed is continuous along the lamination direction from the observation side to the printed layer. The layer furthest from the observation side further includes a laser coloring layer,
4. The color image display laminate according to claim 1, wherein a fifth opening segment in which the reflective layer has been removed is continuous along the lamination direction from the observation side to the laser coloring layer. The plurality of micro-relief layers and the plurality of reflective layers each include at least three layers,
4. The color image display laminate according to claim 1, wherein the at least three fine uneven layers include a fine uneven layer having fine unevenness that contributes to presenting a red color, a fine uneven layer having fine unevenness that contributes to presenting a blue color, and a fine uneven layer having fine unevenness that contributes to presenting a green color. The plurality of micro-relief layers and the plurality of reflective layers each include at least three layers,
The color image display laminate according to any one of claims 1 to 3, characterized in that the at least three fine uneven layers include a fine uneven layer provided with fine unevenness that contributes to the presentation of cyan, a fine uneven layer provided with fine unevenness that contributes to the presentation of magenta, and a fine uneven layer provided with fine unevenness that contributes to the presentation of yellow. The color image display laminate according to any one of claims 1 to 3, characterized in that the fine irregularities provided in each of the plurality of fine irregularity layers are made of a diffraction grating. The color image display laminate according to any one of claims 1 to 3, characterized in that the fine irregularities provided in each of the plurality of fine irregularity layers are phase modulation elements of a computer-generated hologram that forms a three-dimensional reconstructed image. The color image display laminate according to any one of claims 1 to 3, characterized in that at least one of the plurality of reflective layers is in contact with the opposing fine concave-convex layer of the plurality of fine concave-convex layers. The color image display laminate according to any one of claims 1 to 3, characterized in that at least one of a release layer and an adhesive layer is disposed between any of the layers. The color image display laminate according to claim 11, characterized in that the layer disposed between any of the layers has a lower infrared transmittance than the plurality of fine concave-convex layers. The color image display laminate according to any one of claims 1 to 3, characterized in that at least one of the plurality of fine concave-convex layers has a lower infrared transmittance than the other fine concave-convex layers. The color image display laminate of claim 4, characterized in that the printed layer is black and absorbs visible light. 2. A method for producing a color image display laminate, comprising the step of removing a portion of the first reflective layer in the color image display laminate according to claim 1 by irradiating with a laser beam. 3. A method for producing a color image display laminate, comprising the step of removing a portion of the second reflective layer in the color image display laminate according to claim 2 by irradiating with a laser beam. A method for producing a color image display laminate, comprising simultaneously performing a step of removing a portion of the first reflective layer and a step of removing a portion of the second reflective layer in the color image display laminate described in claim 2 by irradiating with a laser beam. 4. A method for producing a color image display laminate, comprising the step of removing a portion of the third reflective layer in the color image display laminate according to claim 3 by irradiating with a laser beam. A method for producing a color image display laminate, comprising simultaneously performing a step of removing a portion of the second reflective layer and a step of removing a portion of the third reflective layer in the color image display laminate described in claim 3 by irradiating with a laser beam. A step of removing a part of all of the reflective layers in the color image display laminate according to claim 5 by irradiating with a laser beam;
and modifying, by irradiating with a laser beam, an area of the laser coloring layer corresponding to a portion from which the reflective layer has been continuously removed along a stacking direction from the observation side to the laser coloring layer. The method for producing the color image display laminate described in claim 20, characterized in that the step of removing a part of the first reflective layer in the color image display laminate described in claim 5 and the step of modifying are carried out simultaneously by irradiating with a laser beam.