Display

Abstract

A display technology capable of displaying a special image is provided. A display body (1) includes an image display layer (22) and a mask layer (10). The image display layer (22) includes one or more colored portions (22P), and displays a transmitted light image corresponding to one or more colored portions (22P) when illuminated by white light. The mask layer (10) includes a transparent material layer (11) having a first and a second main surface, and the first main surface includes one or more regions each consisting of a first and a second band-shaped portion (BP1, BP2) alternately arranged in a width direction. The second band-shaped portion (BP2) is provided with a relief structure. A portion of the mask layer (10) corresponding to at least one (SR1) of the one or more regions conceals a portion of the transmitted light image corresponding to the second band-shaped portion (BP2).

Description

Technical Field

[0001] Embodiments of the present invention relate to display technology. Background Art

[0002] On identification (ID) cards such as employee ID cards, driver's licenses, and student ID cards, fixed information such as background patterns and individual information such as name, card number, and expiration date are recorded. Such ID cards can be used to identify individuals, for example, within a facility or when entering or exiting a facility. In order to prevent counterfeiting or alteration, special printing using special inks and affixing facial photos or holograms are used on ID cards.

[0003] However, with the recent popularization of color copiers and the emergence of highly functional photoengraving devices, the technology of counterfeiting or falsification is becoming more sophisticated, and therefore, the danger of crimes caused by counterfeiting or falsification is increasing.

[0004] In addition, there is also a method of recording invisible information that cannot be identified under normal conditions on the ID card, and using a reader or identification tool to identify the invisible information when determining the authenticity of the ID card. Since the invisible information cannot be identified under normal conditions, this technology can become a more effective countermeasure to prevent counterfeiting.

[0005] As a method of visualizing invisible information, for example, a fine line or dot pattern is printed on the ID card in advance, and a discrimination film or lens film that interferes with the pattern is superimposed to produce moiré. The authenticity of the ID card can be determined based on the presence or shape of the moiré.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Laid-Open No. 6-40190

[0009] Patent Document 2: Japanese Patent Application Publication No. 2002-279480

[0010] Patent Document 3: International Publication No. 2009 / 139396 Summary of the invention

[0011] An object of the embodiments of the present invention is to provide a display technology capable of performing special image display.

[0012] According to one aspect of the present invention, there is provided a display body comprising: an image display layer, which includes one or more colored portions and displays a transmitted light image corresponding to the one or more colored portions when illuminated by white light; and a mask layer, which is a mask layer comprising a transparent material layer having a first and a second main surface, and the first main surface includes one or more areas consisting of a first and a second strip-shaped portion each alternately arranged in a free width direction, the second strip-shaped portion being provided with a relief structure, and a portion corresponding to at least one of the one or more areas conceals a portion of the transmitted light image corresponding to the second strip-shaped portion.

[0013] When the second strip-shaped portion is irradiated with light, the relief structure causes the reflection angle of at least a portion of the reflected light to deviate from the regular reflection angle. The relief structure is, for example, a scattering structure that exhibits isotropic light scattering, an anisotropic scattering structure that exhibits anisotropic light scattering, or a light deflecting structure such as a blazed diffraction grating that emits strong reflected light at an angle different from the regular reflection angle. The relief structure imparts to the second strip-shaped portion different reflection characteristics and transmission characteristics from the flat first strip-shaped portion.

[0014] Therefore, for example, when the display is placed on a black surface so that the image display layer is located between the black surface and the mask layer, and the display is illuminated with white light from the mask layer side, and observation is performed under a condition where regular reflected light is not recognized (hereinafter, this observation condition is referred to as the first observation condition), the observer can recognize the light (e.g., scattered light) emitted from the relief structure as reflected light. That is, in this case, the display displays images corresponding to the above-mentioned one or more regions.

[0015] In addition, when the display is illuminated with white light from the mask layer side or the image display layer side to observe the transmitted light (hereinafter, this observation condition is referred to as the second observation condition), the display shows a partially concealed image in which the transmitted light image is partially concealed by the mask layer.

[0016] Then, for example, when the display is placed on a white surface so that the mask layer is located between the white surface and the image display layer, and the display is illuminated with white light from the image display layer side (hereinafter, this observation condition is referred to as the third observation condition), the observer can visually recognize the reflected light image corresponding to the above-mentioned transmitted light image. That is, in this case, the display shows images corresponding to the above-mentioned one or more colored portions.

[0017] Thus, the display can display various images according to observation conditions. In other words, the display can display special images.

[0018] According to another aspect of the present invention, there is provided the display according to the above aspect, wherein the first main surface is separated from the image display layer.

[0019] When the first main surface is separated from the image display layer, the position of the portion of the transmitted light image hidden by the mask layer changes when the observation angle is changed under the second observation condition. Therefore, for example, the image displayed by the display under the second observation condition can change according to the observation angle.

[0020] According to another aspect of the present invention, there is provided a display body according to the above aspect, wherein the distance from the first main surface to the image display layer is in the range of 50 μm to 2 mm. When the distance is shortened, the display body is easily broken. When the distance is lengthened, the display body becomes thicker. On the basis of achieving high printing accuracy using a general device, the distance is preferably in the range of 100 μm to 2 mm, more preferably in the range of 150 μm to 1 mm.

[0021] In addition, when the above distance is long, when the observation angle is changed under the second observation condition, the position of the portion hidden by the mask layer in the transmitted light image changes significantly. Therefore, for example, the image displayed by the display under the second observation condition can change significantly according to the observation angle. However, when the above distance is too long, the observer will feel the flicker of the image. On the basis of increasing the change of the image according to the observation angle without causing the observer to feel the flicker of the image, the distance is preferably in the range of 100 μm to 800 μm.

[0022] According to another aspect of the present invention, there is provided a display body according to any one of the above aspects, wherein the pitch P of the first band-shaped portion is B 1 is in the range of 50 to 500 μm. Considering the size of the colored portion formed by printing or the like and the distance from the first main surface to the image display layer, the pitch P is set to B The structure provided within the above range is suitable for changing the image under the second observation condition as described above, for example.

[0023] Pitch B 1 is preferably in the range of 100 to 350 μm. This configuration is advantageous for stable printing and is less likely to cause jaggies in the image displayed on the display. B 1 is more preferably in the range of 150 to 300 μm. According to this configuration, a particularly excellent appearance can be achieved.

[0024] According to another aspect of the present invention, there is provided a display according to any one of the above aspects, wherein the width W of the first strip-shaped portion is B 1 and the width W of the second strip portion B 2 ratio W B 1 / W B 2 is in the range of 1 / 4 to 2 / 1. B 1 / W B2 is preferably in the range of 1 / 4 to 1 / 1, more preferably in the range of 1 / 2 to 3 / 4.

[0025] When W B 1 / W B 2 increases, under the first observation condition, not only the image from the relief structure can be observed, but also the reflected light image corresponding to the transmitted light image can be observed. B 1 / W B 2 is reduced, under the first observation condition, it is possible to make the reflected light image corresponding to the transmitted light image difficult to observe.

[0026] According to other aspects of the present invention, there is provided a display according to any one of the above aspects, wherein, in a partially concealed image in which the transmitted light image is partially concealed by the mask layer, at least one of the color and shape changes by tilting the display about an axis parallel to the length directions of the first and second strip-shaped portions.

[0027] When the tilt angle of the display body is changed under the second observation condition, the position of the portion of the transmitted light image concealed by the mask layer changes. Therefore, for example, the image display layer can be configured in the following manner: when the tilt angle under the second observation condition is set to the first angle, the display body displays the first partially concealed image as the partially concealed image, and when the tilt angle under the second observation condition is set to the second angle different from the first angle, the display body displays the second partially concealed image different from the first partially concealed image as the partially concealed image. Therefore, a more special image display can be performed.

[0028] According to other aspects of the present invention, there is provided a display according to any one of the above aspects, wherein the transmitted light image generates moiré by being partially concealed by the mask layer.

[0029] One or more colored portions included in the image display layer may include periodically arranged patterns. For example, these patterns are strip patterns arranged in the width direction, and their length direction and width direction are respectively equal to the length direction and width direction of the first or second strip portion. In the case where the arrangement period of these strip patterns deviates from the arrangement period of the first or second strip portion, the transmitted light image can generate moire by being partially concealed by the mask layer. Alternatively, in the case where the arrangement direction of the above-mentioned strip patterns is inclined relative to the arrangement direction of the first or second strip portion, the transmitted light image can also generate moire by being partially concealed by the mask layer.

[0030] According to another aspect of the present invention, there is provided the display according to any one of the above aspects, further comprising a reflective layer covering the first main surface.

[0031] When the reflective layer is provided, the efficiency of the optical effect produced by the relief structure, such as light scattering or light deflection, is improved. Therefore, for example, under the first observation condition, the visibility of the image from the relief structure is improved. In addition, when the reflective layer is provided, under the second observation condition, the effect of the mask layer hiding the portion of the transmitted light image corresponding to the second band-shaped portion is improved.

[0032] According to another aspect of the present invention, there is provided a display according to the above aspect, wherein the reflective layer includes a metal layer, and a portion of the metal layer corresponding to the at least one of the one or more regions is provided with a plurality of slits each opening along a length direction of the first strip-shaped portion at the position of the first strip-shaped portion.

[0033] In the case where a reflective layer including a metal layer is provided, the efficiency of the optical effect generated by the relief structure, such as light scattering or light deflection, can be further improved compared to the case where a reflective layer not including a metal layer is provided. Therefore, for example, under the first observation condition, the visibility of the image from the relief structure is further improved. In addition, under the second observation condition, the effect of the mask layer concealing the portion corresponding to the second band-shaped portion in the transmitted light image is further improved.

[0034] According to another aspect of the present invention, there is provided a display according to any one of the above aspects, wherein in at least one of the one or more regions, the relief structure is a scattering structure.

[0035] When the relief structure is a scattering structure, the image from the relief structure tends to be brightly displayed in a wide angle range under the first observation condition. Under the first observation condition, when the image from the relief structure becomes bright, it is difficult to observe the reflected light image corresponding to the transmitted light image.

[0036] According to another aspect of the present invention, there is provided a display according to any one of the above aspects, wherein in at least one of the one or more regions, the relief structure is an anisotropic scattering structure composed of a plurality of grooves arranged in the width direction.

[0037] As described above, the anisotropic scattering structure is composed of a plurality of grooves arranged in the width direction. For example, at least one of the centerline distance and the width of these grooves is random. Therefore, the anisotropic scattering structure exhibits higher light scattering in the direction perpendicular to the length direction of the grooves and lower light scattering in the direction perpendicular to the arrangement direction of the grooves. Therefore, for example, under the first observation condition, by rotating the display body around an axis parallel to its thickness direction, the brightness of the region where the anisotropic scattering structure as a relief structure is provided changes.

[0038] According to other aspects of the present invention, a display body involved in the above-mentioned aspect is provided, wherein the one or more regions include two or more regions in which the relief structure is the anisotropic scattering structure, the length directions of the plurality of grooves are different from each other, and the arrangement directions of the first and second band-shaped portions are equal to each other.

[0039] Since the arrangement directions of the first and second band-shaped portions are equal to each other, the two or more regions are difficult to distinguish from each other under the second observation condition. In addition, since the length directions of the grooves constituting the anisotropic scattering structure in the two or more regions are different from each other, when the display body is rotated around an axis parallel to its thickness direction under the first observation condition, the rotation angles at which it appears bright are different. Therefore, for example, under the first observation condition, by rotating the display body around an axis parallel to its thickness direction, the shape of the image from the relief structure changes.

[0040] According to another aspect of the present invention, there is provided a display according to any one of the above aspects, further comprising a reflective layer covering the first main surface, the one or more regions including first and second scattering regions in which the scattering structures as the relief structures are provided in the second band-shaped portions, the first main surface further including first and second flat regions which are each flat, the reflective layer including a metal layer, a first portion of the metal layer corresponding to the first scattering region being provided with a plurality of first slits each opening along the length direction of the first band-shaped portion at a position of the first band-shaped portion, A second portion of the metal layer corresponding to the second scattering region is provided with no openings or with a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits, a third portion of the metal layer corresponding to the first flat region is provided with a plurality of second slits arranged in a width direction and having a length direction equal to that of the plurality of first slits, and a fourth portion of the metal layer corresponding to the second flat region is provided with no openings or with a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits.

[0041] Under the first observation condition, the portion of the display body corresponding to the combination of the first and second scattering regions appears bright because scattered light is emitted. On the other hand, the portion corresponding to the combination of the first and second flat regions does not emit scattered light and appears dark under the condition that regular reflected light is not recognized.

[0042] Under the second observation condition, the portion of the display body corresponding to the combination of the first scattering region and the first flat region and the portion corresponding to the combination of the second scattering region and the second flat region appear to have different colors. For example, under the second observation condition, the portion of the display body corresponding to the combination of the first scattering region and the first flat region appears to be bright, and the portion corresponding to the combination of the second scattering region and the second flat region appears to be dark.

[0043] As a result, the display can display more complex images.

[0044] Alternatively, according to another aspect of the present invention, there is provided a display body according to any one of the above aspects, further comprising a reflecting layer covering the first main surface, the one or more regions including first to fourth scattering regions in which an anisotropic scattering structure composed of a plurality of grooves arranged in a width direction as the relief structure is provided in each of the second band-shaped portions, the first main surface further comprising first and second flat regions which are each flat, the reflecting layer comprising a metal layer, a first portion of the metal layer corresponding to the first scattering region is provided with a plurality of first slits each opening in the length direction of the first band-shaped portion at a position of the first band-shaped portion, a second portion of the metal layer corresponding to the second scattering region is not provided with an opening, or is provided with a plurality of slits arranged in the width direction and having a length direction different from that of the plurality of first slits, and a third portion of the metal layer corresponding to the first flat region is provided with a plurality of first slits each opening in the length direction of the first band-shaped portion. a plurality of second slits arranged upward and having a length direction equal to that of the plurality of first slits; a fourth portion of the metal layer corresponding to the second flat region is provided with no opening or with a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits; a fifth portion of the metal layer corresponding to the third scattering region is provided with a plurality of third slits each opening along the length direction of the first strip-shaped portion at a position of the first strip-shaped portion; a sixth portion of the metal layer corresponding to the fourth scattering region is provided with no opening or with a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits; the width directions of the plurality of grooves of the first and second scattering regions are equal to each other, and the width directions of the plurality of grooves of the third and fourth scattering regions are equal to each other and have a length direction different from that of the plurality of grooves of the first and second scattering regions.

[0045] Under the first observation condition, for example, when a direction perpendicular to the width direction of the grooves of the third and fourth scattering regions and inclined to the length direction of the grooves of the third and fourth scattering regions is set as the observation direction, the portion of the display corresponding to the combination of the first and second scattering regions appears bright because it emits strong scattered light. On the other hand, the portion of the display corresponding to the combination of the third and fourth scattering regions appears dark because it does not emit scattered light or emits weak scattered light. Furthermore, the portion corresponding to the combination of the first and second flat regions appears dark under the condition that the regular reflected light is not recognized because it does not emit scattered light.

[0046] In addition, under the first observation condition, for example, when the direction perpendicular to the width direction of the grooves of the first and second scattering regions and inclined to the length direction of the grooves of the first and second scattering regions is set as the observation direction, the portion corresponding to the combination of the third and fourth scattering regions in the display body appears bright because it emits strong scattered light. On the other hand, the portion corresponding to the combination of the first and second scattering regions in the display body appears dark because it does not emit scattered light or emits weak scattered light. Furthermore, the portion corresponding to the combination of the first and second flat regions appears dark under the condition that the regular reflected light is not recognized because it does not emit scattered light.

[0047] Under the second observation condition, the portion of the display body corresponding to the combination of the first and third scattering regions and the first flat region and the portion corresponding to the combination of the second and fourth scattering regions and the second flat region appear to have different colors. For example, under the second observation condition, the portion of the display body corresponding to the combination of the first and third scattering regions and the first flat region appears to be bright, and the portion corresponding to the combination of the second and fourth scattering regions and the second flat region appears to be dark.

[0048] Therefore, the display can also display more complex images. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] [ Figure 1 ] Figure 1 It is a plan view schematically showing a mask layer included in the display according to the first embodiment of the present invention.

[0050] [ Figure 2 ] Figure 2 It is along Figure 1 A cross-sectional view of the mask layer taken along line II-II is shown.

[0051] [ Figure 3 ] Figure 3 It is along Figure 1 A cross-sectional view of the mask layer taken along line III-III is shown.

[0052] [ Figure 4 ] Figure 4 It is along Figure 1 A cross-sectional view of the mask layer taken along line IV-IV is shown.

[0053] [ Figure 5 ] Figure 5 It is along Figure 1 A cross-sectional view of the mask layer taken along line VV is shown.

[0054] [ Figure 6 ] Figure 6 The display body according to the first embodiment of the present invention is schematically shown. Figure 2 The corresponding cross-section diagram.

[0055] [ Figure 7 ] Figure 7 The display body according to the first embodiment of the present invention is schematically shown. Figure 3 The corresponding cross-section diagram.

[0056] [ Figure 8 ] Figure 8 The display body according to the first embodiment of the present invention is schematically shown. Figure 4 The corresponding cross-section diagram.

[0057] [ Fig. 9 ] Fig. 9 The display body according to the first embodiment of the present invention is schematically shown. Figure 5 The corresponding cross-section diagram.

[0058] [ Fig.10 ] Fig.10 It is a diagram schematically showing the first observation condition.

[0059] [ Fig.11 ] Fig.11 It is shown Figures 6 to 9 The shown figure is a diagram of an example of an image displayed by the display under the first observation condition.

[0060] [ Fig.12 ] Fig.12 It is a diagram schematically showing the second observation condition.

[0061] [ Fig.13 ] Fig.13 It is shown Figures 6 to 9 The diagram shows an example of an image displayed by the display under the second observation condition.

[0062] [ Fig.14 ] Fig.14 This is a diagram schematically showing a state where the display body is tilted under the second observation condition.

[0063] [ Fig.15 ] Fig.15 It is a plan view schematically showing a mask layer included in a display according to a second embodiment of the present invention.

[0064] [ Fig.16 ] Fig.16 is schematically shown in Fig.15 FIG. 1 is a plan view showing an example of a structure that can be adopted as an anisotropic scattering structure in the first and second scattering regions of the mask layer.

[0065] [ Fig.17 ] Fig.17 is schematically shown in Fig.15 A plan view showing an example of a structure that can be adopted as an anisotropic scattering structure in the third and fourth scattering regions of the mask layer is shown.

[0066] [ Fig.18 ] Fig.18 It is schematically shown from Fig.12 The state shown is a diagram in which the display body is rotated 90 degrees.

[0067] [ Fig.19 ] Fig.19 The display body according to the second embodiment of the present invention is shown in Fig.18 An example of an image displayed under the viewing conditions shown in the figure.

[0068] [ Fig. 20 ] Fig. 20 FIG. 1 is a plan view schematically showing an example of a structure that a mask layer can adopt.

[0069] [ Fig.21 ] Fig.21 FIG. 1 is a plan view schematically showing an example of a structure that can be adopted by the image holding member.

[0070] [ Fig. 22 ] Fig. 22 It is a schematic diagram showing Fig. 20 The mask layer and Fig.21 A plan view of an example of a situation in which a display body of an image display layer displays an image under a second observation condition.

[0071] [ Fig.23 ] Fig.23 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0072] [ Fig.24 ] Fig.24 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0073] [ Fig.25 ] Fig.25 It is a schematic diagram showing Fig.23 The mask layer and Fig.24 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0074] [ Fig.26 ] Fig.26 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0075] [ Fig. 27 ] Fig. 27 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0076] [ Fig.28 ] Fig.28 It is a schematic diagram showing Fig.26 The mask layer and Fig. 27 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0077] [ Fig.29 ] Fig.29 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0078] [ Fig.30 ] Fig.30 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0079] [ Fig.31 ] Fig.31 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0080] [ Fig.32 ] Fig.32 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition.

[0081] [ Fig.33 ] Fig.33 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition.

[0082] [ Fig.34 ] Fig.34 It is a schematic diagram showing Fig.29 The mask layer and Fig.30A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition. DETAILED DESCRIPTION

[0083] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments described below are ways of making any of the above aspects more specific. It should be noted that the same reference numerals are used for elements having the same or similar functions, and repeated descriptions are omitted.

[0084] <First Embodiment>

[0085] Figure 1 It is a plan view schematically showing a mask layer included in the display according to the first embodiment of the present invention. Figure 2 It is along Figure 1 A cross-sectional view of the mask layer taken along line II-II is shown. Figure 3 It is along Figure 1 A cross-sectional view of the mask layer taken along line III-III is shown. Figure 4 It is along Figure 1 A cross-sectional view of the mask layer taken along line IV-IV is shown. Figure 5 It is along Figure 1 A cross-sectional view of the mask layer taken along line VV is shown.

[0086] in addition, Figure 6 The display body according to the first embodiment of the present invention is schematically shown. Figure 2 The corresponding cross-section diagram. Figure 7 The display body according to the first embodiment of the present invention is schematically shown. Figure 3 The corresponding cross-section diagram. Figure 8 The display body according to the first embodiment of the present invention is schematically shown. Figure 4 The corresponding cross-section diagram. Fig. 9 The display body according to the first embodiment of the present invention is schematically shown. Figure 5 The corresponding cross-section diagram.

[0087] It should be noted that in each figure, the X direction is a direction parallel to the first main surface described later, that is, a direction parallel to the display surface of the display body. In addition, the Y direction is a direction parallel to the first main surface and perpendicular to the X direction, that is, a direction parallel to the display surface and perpendicular to the X direction. Furthermore, the Z direction is a direction perpendicular to the X direction and the Y direction, that is, a thickness direction of the display body or the mask layer.

[0088] Figures 6 to 9 The display body 1 shown includes a mask layer 10 , an image holding body 20 , and an adhesive layer 30 .

[0089] like Figures 2 to 9As shown, the mask layer 10 includes a transparent material layer 11 and a reflective layer 12 .

[0090] The transparent material layer 11 is transparent to light in the visible light region and is preferably colorless and transparent.

[0091] The transparent material layer 11 may be a sheet or a film. The transparent material layer 11 may be a polymer sheet or a polymer film. The transparent material layer 11 may have a single-layer structure or a multi-layer structure.

[0092] As materials for the transparent material layer 11, for example, there can be listed: photocurable resins such as polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methyl styrene resin, fluorene resin, polyethylene terephthalate (PET) and polypropylene; thermosetting resins such as acrylonitrile styrene copolymer resin, phenolic resin, melamine resin, urea resin and alkyd resin; and thermoplastic resins such as polypropylene resin, polyethylene terephthalate resin and polyacetal resin.

[0093] like Figures 2 to 5 As shown, the transparent material layer 11 has a first main surface S1 and a second main surface S2. As described later, a relief structure RS is provided on the first main surface S1. The second main surface S2 is, for example, a flat surface.

[0094] The first main surface S1 and Figures 6 to 9 The image holding body 20 shown is separated. Figures 1 to 5 As shown, the first main surface S1 includes a first scattering region SR1 , a second scattering region SR2 , a first flat region FR1 , and a second flat region FR2 .

[0095] like Figure 2 and Figure 3 As shown in FIG. 1 , the first scattering region SR1 and the second scattering region SR2 are each composed of the first strip-shaped portion BP1 and the second strip-shaped portion BP2 alternately arranged in the width direction. Here, the length direction of the first strip-shaped portion BP1 and the second strip-shaped portion BP2 is the X direction. Also, here, the width direction of the first strip-shaped portion BP1 and the second strip-shaped portion BP2 is the Y direction.

[0096] In each of the first scattering region SR1 and the second scattering region SR2, the width of each first band-shaped portion BP1 along the length direction thereof is constant. In addition, in each of the first scattering region SR1 and the second scattering region SR2, the widths of the first band-shaped portions BP1 are equal to each other, and the first band-shaped portions BP1 are arranged at a certain pitch in the width direction so as to sandwich the second band-shaped portion BP2 therebetween. In the first scattering region SR1 and the second scattering region SR2, the widths of the first band-shaped portions BP1 are equal, and the arrangement pitches of the first band-shaped portions BP1 are also equal. In each of the first scattering region SR1 and the second scattering region SR2, the first band-shaped portion BP1 is a flat surface.

[0097] In each of the first scattering region SR1 and the second scattering region SR2, the width of each second band-shaped portion BP2 along the length direction thereof is constant. In addition, in each of the first scattering region SR1 and the second scattering region SR2, the widths of the second band-shaped portions BP2 are equal to each other, and the second band-shaped portions BP2 are arranged at a constant pitch in the width direction so as to sandwich the first band-shaped portion BP1 therebetween. In the first scattering region SR1 and the second scattering region SR2, the widths of the second band-shaped portions BP2 are equal, and the arrangement pitches of the second band-shaped portions BP2 are also equal.

[0098] In each of the first scattering region SR1 and the second scattering region SR2, a relief structure RS is provided on the second band-shaped portion BP2. Here, the relief structure RS is a scattering structure that generates isotropic light scattering. According to one example, such a scattering structure is composed of a plurality of randomly arranged convex portions and / or concave portions.

[0099] like Figure 1 As shown, the first scattering region SR1 and the second scattering region SR2 may be adjacent to each other. In addition, here, the combination of the first scattering region SR1 and the second scattering region SR2 has a shape of three heart shapes connected laterally. The combination of the first scattering region SR1 and the second scattering region SR2 may have a continuous shape.

[0100] like Figure 4 and Figure 5 As shown in FIG. 1 , the first flat region FR1 and the second flat region FR2 are flat surfaces. Figure 1 In this way, the combination of the first flat region FR1 and the second flat region FR2 may be adjacent to the combination of the first scattering region SR1 and the second scattering region SR2. Specifically, the combination of the first flat region FR1 and the second flat region FR2 may surround the combination of the first scattering region SR1 and the second scattering region SR2.

[0101] The combination of the first scattering region SR1 and the first flat region FR1 has a square shape. That is, the outer shapes of the first scattering region SR1 and the first flat region FR1 are square. The outer shapes of the first scattering region SR1 and the first flat region FR1 are not limited to squares, and can be geometric shapes or symbols. The combination of the second scattering region SR2 and the second flat region FR2 has a square opening. The combination of the second scattering region SR2 and the second flat region FR2 is not limited to a square, and can be geometric shapes or symbols.

[0102] like Figures 2 to 5 As shown, the reflective layer 12 covers the first main surface S1.

[0103] The reflective layer 12 is, for example, an inorganic dielectric layer, a metal layer, or a combination thereof.

[0104] The reflective layer 12 preferably includes a metal layer. The reflective layer 12 may be a light-shielding metal layer. The thickness of the metal layer may be set to be greater than 20 nm and less than 70 nm. If it is this thickness, it can be a light-shielding metal layer.

[0105] As a material of the metal layer, chromium, nickel, aluminum, iron, titanium, silver, gold or copper can be used. The metal layer can be formed by a vacuum film forming method such as vacuum evaporation or sputtering. In other words, the metal layer can be formed by physical deposition. In addition, the first slit SL1 and the second slit SL2 described later can be formed by etching.

[0106] like Figures 1 to 9 As shown, the reflective layer 12 includes a first portion P1, a second portion P2, a third portion P3, and a fourth portion P4. The first portion P1, the second portion P2, the third portion P3, and the fourth portion P4 are portions of the reflective layer 12 corresponding to the first scattering region SR1, the second scattering region SR2, the first flat region FR1, and the second flat region FR2, respectively.

[0107] like Figure 2 and Figure 6 As shown, the first portion P1 covers the first scattering region SR1. The first portion P1 is provided with a plurality of first slits SL1. Each of the first slits SL1 opens at the position of the first strip-shaped portion BP1 along the length direction of the first strip-shaped portion BP1.

[0108] like Figure 3 and Figure 7 As shown in FIG. 1 , the second portion P2 covers the second scattering region SR2. The second portion P2 has no openings. That is, the second portion P2 covers the entire second scattering region SR2.

[0109] like Figure 4 and Figure 8As shown, the third portion P3 covers the first flat region FR1. The third portion P3 is provided with a plurality of second slits SL2. The length direction and the width direction of the second slits SL2 are respectively equal to the length direction and the width direction of the first slits SL1.

[0110] Here, the width of the second slit SL2 is equal to that of the first slit SL1. The arrangement pitch of the second slit SL2 is equal to that of the first slit SL1. Furthermore, the position of the second slit SL2 in the arrangement direction is equal to that of the first slit SL1 in the arrangement direction.

[0111] like Figure 5 and Fig. 9 As shown, the fourth portion P4 covers the second flat region FR2. The fourth portion P4 has no opening. That is, the fourth portion P4 covers the entire second flat region FR2.

[0112] The portions of the mask layer 10 corresponding to the first scattering regions SR1 and the second scattering regions SR2 have light scattering properties, whereas the portions of the mask layer 10 corresponding to the first flat regions FR1 and the second flat regions FR2 do not have light scattering properties.

[0113] In addition, the portions of the mask layer 10 corresponding to the first scattering region SR1 and the first flat region FR1 are light-transmissive at the positions of the first slit SL1 and the second slit SL2, respectively, and are light-shielding at other positions. On the other hand, the portions of the mask layer 10 corresponding to the second scattering region SR2 and the second flat region FR2 are light-shielding in their entirety.

[0114] like Figures 6 to 9 As shown, the image retainer 20 is opposite to the reflective layer 12. The image retainer 20 and the mask layer 10 may be arranged in such a manner that the image retainer 20 is opposite to the second main surface. However, when the image retainer 20 and the mask layer 10 are arranged in such a manner that the image retainer 20 is opposite to the reflective layer 12, the transparent material layer 11 can play the role of a protective layer that protects the relief structure RS and the reflective layer 12 from being damaged.

[0115] The image holding body 20 includes a transparent base material 21 , an image display layer 22 , and a protective layer 23 .

[0116] The transparent substrate 21 is transparent to light in the visible light region. The transparent substrate 21 is preferably colorless and transparent.

[0117] The transparent substrate 21 may be a soft substrate such as a sheet or a film, or a hard substrate such as a card. The transparent substrate 21 may have a single-layer structure or a multi-layer structure.

[0118] The material of the transparent base material 21 may be an inorganic material such as glass, or an organic material such as a polymer. As the organic material such as a polymer, the materials exemplified in relation to the transparent material layer 11 may be used.

[0119] The image display layer 22 is provided on one main surface of the transparent substrate 21. The image display layer 22 faces the reflective layer 12 with the transparent substrate 21 interposed therebetween. Such an arrangement is suitable for increasing the distance from the first main surface S1 to the image display layer 22.

[0120] The image display layer 22 includes one or more colored portions 22P. Here, the image display layer 22 is composed of a plurality of colored portions 22P. Each of these colored portions 22P is located at a lattice point of a virtual two-dimensional lattice.

[0121] According to one example, one or more coloring parts 22P are light-shielding. According to another example, each of the one or more coloring parts 22P exhibits a higher transmittance in a certain wavelength region in the visible light region, and exhibits a lower transmittance in other wavelength regions in the visible light region. In this case, the one or more coloring parts 22P may be two or more coloring parts with different transmission spectra. Here, as an example, the coloring part 22P is black.

[0122] When illuminated with white light, the image display layer 22 displays a transmitted light image corresponding to one or more colored portions 22P. The transmitted light image is an image that is darker at the location of the colored portion 22P and brighter at other locations. The arrangement of the lattice points in the above-mentioned imaginary two-dimensional lattice, the arrangement of the first slit SL1, and the arrangement of the second slit SL2 are designed in such a way that the transmitted light image is partially concealed by the mask layer 10 to generate moire.

[0123] The image display layer 22 including the coloring portion 22P is formed, for example, by a thermal transfer recording method using a thermal head, an inkjet recording method, an electrophotographic method, or a combination of two or more thereof. The image display layer 22 including the coloring portion 22P can also be formed by micro-offset printing. According to an example, the coloring portion 22P of the image display layer 22 thus obtained includes at least one of a dye and a pigment. These coloring portions 22P may further include other components such as an adhesive resin.

[0124] The image display layer 22 may be formed on the transparent substrate 21. Alternatively, the image display layer 22 may be disposed on the transparent substrate 21 by preparing a transfer foil in which the protective layer 23 and the image display layer 22 are sequentially disposed on a support, and transferring the laminate including the protective layer 23 and the image display layer 22 from the support to the transparent substrate 21.

[0125] An additional image display layer may also be provided on the above-mentioned main surface of the transparent substrate 21. According to one example, the additional image display layer contains at least one of a dye and a pigment. The image display layer may further contain other components such as a binder resin. Such an image display layer may be formed, for example, by a thermal transfer recording method using a thermal head, an inkjet recording method, an electrophotographic method, or a combination of two or more thereof. Alternatively, the additional image display layer may be formed by forming a layer containing a thermosensitive color developer and using a laser beam to draw on the layer. Alternatively, the additional image display layer may be formed by using a combination of these methods.

[0126] The protective layer 23 covers the above-mentioned main surface of the transparent substrate 21 and the image display layer 22. The protective layer 23 protects the image display layer 22 from being damaged.

[0127] The protective layer 23 is transparent to light in the visible light region. The protective layer 23 is preferably colorless and transparent. The material of the protective layer 23 may be a polymer. The protective layer 23 may be provided by forming a polymer coating on the transparent substrate 21 and the image display layer 22, or by pasting a polymer film or a polymer sheet on the transparent substrate 21 and the image display layer 22.

[0128] The adhesive layer 30 is sandwiched between the mask layer 10 and the image holding body 20. The adhesive layer 30 adheres the mask layer 10 and the image holding body 20 in such a manner that the reflective layer 12 faces the transparent substrate 21. The adhesive layer 30 is transparent to light in the visible light region. The adhesive layer 30 is preferably colorless and transparent. The adhesive layer 30 may have a single-layer structure composed of an adhesive, or may have a multi-layer structure including a layer composed of an adhesive and a layer composed of an anchor coating agent.

[0129] As described below, the display 1 displays different images under the first to third observation conditions.

[0130] Fig.10 It is a diagram schematically showing the first observation condition. Fig.11 It is shown Figures 6 to 9 The shown figure is a diagram of an example of an image displayed by the display under the first observation condition.

[0131] Under the first observation condition, the display body 1 is placed on a black surface (not shown) so that the image display layer 22 is located between the black surface and the mask layer 10. That is, the display body 1 is placed on the black surface so that the image holding body 20 is located between the black surface and the mask layer 10. In this state, Fig.10 As shown, white light emitted by light source LS is used as illumination light IL to illuminate display 1 from mask layer 10 side. Observer OB sees scattered light emitted by relief structure RS as reflected light RL. It should be noted that here, illumination direction and observation direction are adjusted so that observer OB does not see regular reflected light.

[0132] Under the above conditions, the portions of the display body 1 corresponding to the first scattering region SR1 and the second scattering region SR2 emit scattered light, so these portions appear bright, for example, white.

[0133] It should be noted that the first slit SL1 is provided relative to the first part P1, and the second part P2 has no opening. However, here, the illumination light IL passing through the first slit SL1 is absorbed by the black surface or the colored part 22P. Therefore, the illumination light IL incident on the first slit SL1 does not contribute to the display. On the other hand, in the portion of the display body 1 corresponding to the second scattering region SR2, the portion of the reflective layer 12 corresponding to the first band-shaped portion BP1 specularly reflects the illumination light IL. As described above, here, the illumination direction and the observation direction are adjusted so that the observer OB does not recognize the specularly reflected light, and therefore the specularly reflected light also does not contribute to the display. Therefore, as Fig.11 As shown, the portion of the display body 1 corresponding to the first scattering region SR1 and the portion of the display body 1 corresponding to the second scattering region SR2 appear to be almost equally bright.

[0134] In addition, under the above conditions, the portions of the display body 1 corresponding to the first flat region FR1 and the second flat region FR2 emit regular reflection light. As described above, here, the illumination direction and the observation direction are adjusted so that the observer OB does not recognize the regular reflection light. Therefore, these portions appear dark. For example, these portions appear black.

[0135] It should be noted that the fourth portion P4 has no opening, whereas the third portion P3 is provided with the second slit SL2. However, here, the illumination light IL passing through the second slit SL2 is absorbed by the black surface or the colored portion 22P. In the case where the illumination light IL is not sufficiently absorbed by the black surface and the colored portion 22P, as shown in FIG. Fig.11 As shown, the portion of the display body 1 corresponding to the first flat region FR1 appears brighter than the portion of the display body 1 corresponding to the second flat region FR2. On the other hand, when the illumination light IL is sufficiently absorbed by the black surface and the colored portion 22P, the portion of the display body 1 corresponding to the first flat region FR1 and the portion of the display body 1 corresponding to the second flat region FR2 appear to be almost equally bright.

[0136] Fig.12 It is a diagram schematically showing the second observation condition. Fig.13 It is shown Figures 6 to 9 The diagram shows an example of an image displayed by the display under the second observation condition. Fig.14 This is a diagram schematically showing a state where the display body is tilted under the second observation condition.

[0137] Under the second observation condition, the display body 1 is illuminated with white light from the mask layer 10 side or the image display layer 22 side. Fig.12 As shown, white light emitted from a light source LS is used as illumination light IL, and the display body 1 is illuminated from the image holding body 20 side. The observer OB observes the transmitted light TL.

[0138] The first portion P1 and the third portion P3 are provided with the first slit SL1 and the second slit SL2 , respectively. Therefore, the portion of the display 1 corresponding to the first portion P1 and the third portion P3 displays an image in which the transmitted light image is partially concealed by the mask layer 10 .

[0139] In addition, the portions of the display body 1 corresponding to the second portion P2 and the fourth portion P4 are light-shielding. Therefore, under the above conditions, these portions are Fig.13 For example, these parts appear black.

[0140] Thus, under the second observation condition, the display 1 shows a partially concealed image in which the transmitted light image is partially concealed by the mask layer 10. This partially concealed image can produce, for example, moire. Fig.13 In the figure, the part of the hidden image that produces the moiré pattern is represented by a figure containing a star pattern.

[0141] As described above, the partially concealed image displayed by the display 1 under the second observation condition is different from the image displayed by the display 1 under the first observation condition. Furthermore, in the partially concealed image displayed by the display 1 under the second observation condition, the shape and position of the moiré pattern can be changed by tilting the display 1. Fig.14 As shown, under the second observation condition, when the display body 1 is slightly rotated about an axis parallel to the X direction, the position of the portion of the transmitted light image that is concealed by the mask layer 10 changes. As a result, the shape and position of the moiré pattern change.

[0142] Under the third observation condition, the display body 1 is placed on a white surface so that the mask layer 10 is located between the white surface and the image display layer 22. In this state, the display body 1 is illuminated from the image display layer 22 side. Here, white diffuse light is used as the illumination light. Then, the observer recognizes the reflected light image. Here, the illumination direction and the observation direction are adjusted so that the observer recognizes the positive reflected light.

[0143] Under this observation condition, the illumination light is absorbed by the colored portion 22P at the portion corresponding to the colored portion 22P, and is reflected by the white surface at other portions or reflected or scattered by the reflective layer 12. Therefore, the portion corresponding to the colored portion 22P in the display body 1 appears dark, and the other portions appear bright. Therefore, the observer can visually recognize the reflected light image corresponding to the above-mentioned transmitted light image.

[0144] As described above, the partially concealed image displayed by the display body 1 under the third observation condition is different from the image displayed by the display body 1 under the first or second observation condition.

[0145] Thus, the display 1 described above displays different images under the first to third observation conditions. That is, the display 1 can perform special image display.

[0146] In addition, the partially hidden image displayed by the display body 1 under the second observation condition is different from the image displayed by the display body 1 under the first and third observation conditions. Furthermore, the first and third observation conditions are conditions for observing reflected light, while the second observation condition is a condition for observing transmitted light. That is, the second observation condition is a special observation condition. Therefore, the partially hidden image can play a role as a latent image.

[0147] Furthermore, in the image displayed by the display 1 under the second observation condition, the shape and position of the moiré pattern can be changed by tilting the display 1 .

[0148] <Second Embodiment>

[0149] Fig.15 It is a plan view schematically showing a mask layer included in a display according to a second embodiment of the present invention. Fig.16 is schematically shown in Fig.15 FIG. 1 is a plan view showing an example of a structure that can be adopted as an anisotropic scattering structure in the first and second scattering regions of the mask layer. Fig.17 is schematically shown in Fig.15 A plan view showing an example of a structure that can be adopted as an anisotropic scattering structure in the third and fourth scattering regions of the mask layer is shown.

[0150] The display body according to the second embodiment is the same as the display body 1 according to the first embodiment except that the following configuration is adopted.

[0151] That is, the first main surface S1 of the transparent material layer 11 further includes third scattering regions SR3 and fourth scattering regions SR4. The third scattering regions SR3 and fourth scattering regions SR4 are provided with relief structures.

[0152] The relief structure provided in the first scattering region SR1 , the second scattering region SR2 , the third scattering region SR3 , and the fourth scattering region SR4 is not a scattering structure that generates isotropic light scattering but an anisotropic scattering structure that exhibits anisotropy of light scattering.

[0153] The first scattering region SR1 and the second scattering region SR2 are provided Fig.16 The first anisotropic scattering structure RS1 shown is a relief structure. The first anisotropic scattering structure RS1 is composed of a plurality of first grooves G1 arranged in the width direction. Here, the length direction of the first groove G1 is equal to the X direction, and the width direction is equal to the Y direction. At least one of the center line distance and the width of these first grooves G1 is random. The first anisotropic scattering structure RS1 emits strong scattered light in a direction perpendicular to the length direction of the first groove G1, and does not emit scattered light or emits weak scattered light in a direction parallel to the length direction of the first groove G1 and inclined relative to the first main surface S1.

[0154] The third scattering region SR3 and the fourth scattering region SR4 are provided Fig.17 The second anisotropic scattering structure RS2 shown is a relief structure. The second anisotropic scattering structure RS2 is composed of a plurality of second grooves G2 arranged in the width direction. Here, the length direction of the second grooves G2 is equal to the Y direction, and the width direction is equal to the X direction. At least one of the center line distance and the width of these second grooves G2 is random. The second anisotropic scattering structure RS2 emits strong scattered light in a direction perpendicular to the length direction of the second grooves G2, and does not emit scattered light or emits weak scattered light in a direction parallel to the length direction of the second grooves G2 and inclined relative to the first main surface S1.

[0155] In addition to the first portion P1, the second portion P2, the third portion P3, and the fourth portion P4, the reflective layer 12 further includes a fifth portion P5 and a sixth portion P6. The fifth portion P5 and the sixth portion P6 are portions of the reflective layer 12 corresponding to the third scattering region SR3 and the fourth scattering region SR4, respectively.

[0156] The fifth portion P5 covers the third scattering region SR3. The fifth portion P5 is provided with a plurality of third slits (not shown). The third slits are equal in length direction, arrangement direction, width, and pitch to the first slits SL1 and the second slits SL2.

[0157] The sixth portion P6 covers the fourth scattering region SR4. The sixth portion P6 has no opening.

[0158] This display shows the images described below.

[0159] Fig.18 It is schematically shown from Fig.12The state shown is a diagram in which the display body is rotated 90 degrees. Fig.19 The display body according to the second embodiment of the present invention is shown in Fig.18 An example of an image displayed under the viewing conditions shown in the figure.

[0160] exist Fig.10 When the display body involved in the second embodiment is observed under the first observation condition shown, that is, when the direction perpendicular to the X direction and inclined with respect to the display surface is set as the observation direction, the portion of the display body 1 corresponding to the first scattering region SR1 and the second scattering region SR2 appears bright because they emit strong scattered light. On the other hand, the portion of the display body 1 corresponding to the third scattering region SR3 and the fourth scattering region SR4 appears dark because they do not emit scattered light or emit weak scattered light. Furthermore, since the portion of the display body 1 corresponding to the first flat region FR1 and the second flat region FR2 does not emit scattered light, it appears dark under the condition that the regular reflected light is not visible. Therefore, under this observation condition, the display body 1 displays the reference Fig.11 Illustrated image.

[0161] like Fig.18 As shown, when Fig.10 When the display 1 is rotated 90° around an axis parallel to the Z direction under the observation conditions shown, the portion of the display 1 corresponding to the first scattering region SR1 and the second scattering region SR2 appears dark because they do not emit scattered light or emit weak scattered light. On the other hand, the portion of the display 1 corresponding to the third scattering region SR3 and the fourth scattering region SR4 appears bright because they emit strong scattered light. Furthermore, since the portion of the display 1 corresponding to the first flat region FR1 and the second flat region FR2 does not emit scattered light, it appears dark under the condition that the regular reflected light is not visible. Therefore, under this observation condition, the display 1, for example, appears Fig.19 Image shown.

[0162] When the display 1 according to the second embodiment is observed under the second observation condition, the display 1 displays the same image as the image displayed when the display 1 according to the first embodiment is observed under the second observation condition.

[0163] Furthermore, when the display 1 according to the second embodiment is observed under the third observation condition, the display 1 displays the same image as the image displayed when the display 1 according to the first embodiment is observed under the third observation condition.

[0164] In this way, the display 1 according to the second embodiment also displays different images under the first to third observation conditions. That is, the display 1 can also display special images. In addition, the partially hidden image displayed by the display 1 according to the second embodiment under the second observation condition can also function as a latent image. Furthermore, in the image displayed by the display 1 according to the second embodiment under the second observation condition, the shape and position of the moiré pattern can also be changed by tilting the display 1.

[0165] Furthermore, the image displayed by the display body 1 according to the second embodiment under the first observation condition changes when the display body 1 is rotated around an axis parallel to the thickness direction thereof.

[0166] That is, the display 1 is capable of displaying special and complex images.

[0167] <First Modification>

[0168] Reference Figure 20 to Figure 22 A first modification example will be described.

[0169] Fig. 20 FIG. 1 is a plan view schematically showing an example of a structure that a mask layer can adopt.

[0170] Fig.21 FIG. 1 is a plan view schematically showing an example of a structure that can be adopted by the image holding member.

[0171] Fig. 22 It is a schematic diagram showing Fig. 20 The mask layer and Fig.21 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0172] In addition to the mask layer 10 and the image holding body 20 respectively using Fig. 20 and Fig.21 The display body 1 according to the first modification example is the same as the display body 1 according to the first embodiment except for the structure shown.

[0173] The first main surface S1 does not include the second scattering region SR2, the first flat region FR1, and the second flat region FR2, and the reflective layer 12 does not include the second portion P2, the third portion P3, and the fourth portion P4. Fig. 20 The mask layer 10 is the same as the mask layer 10 of the display body 1 according to the first embodiment.

[0174] That is, in Fig. 20In the mask layer 10, the first strip-shaped portions BP1 and the second strip-shaped portions BP2 extending in the X direction are alternately arranged in the Y direction over the entire first main surface S1. The second strip-shaped portions BP2 are provided with a scattering structure that generates isotropic light scattering as a relief structure RS.

[0175] The first main surface S1 is covered with the reflective layer 12 which is a metal layer. The reflective layer 12 is opened at the position of the first strip-shaped portion BP1. That is, the reflective layer 12 is provided with the first slits SL1 extending along the X direction at the position of the first strip-shaped portion BP1.

[0176] The image display layer 22 includes a first image display layer 22A, a second image display layer 22B, and a third image display layer 22C. Fig.21 The image holding body 20 is the same as the image holding body 20 of the display body 1 according to the first embodiment.

[0177] The first image display layer 22A is composed of a plurality of coloring portions 22P. Each coloring portion 22P is in a curved linear shape. The widths of these coloring portions 22P are substantially equal. The coloring portions 22P are arranged in the width direction at approximately a certain distance. Here, the coloring portions 22P are black.

[0178] The second image display layer 22B and the third image display layer 22C are both solid print layers. Here, the second image display layer 22B and the third image display layer 22C have visible light transmittance and are layers having different transmission spectra in the visible light region.

[0179] Under the first observation condition, the display 1 according to the first modification example appears bright as a whole, for example, appears white as a whole.

[0180] Under the second observation condition, the display 1 shows Fig. 22 In the partially hidden image, moire is generated at the position corresponding to the first image display layer 22A. Fig.14 As described above, when the display body 1 is tilted under the second observation condition, the shape and position of the moiré pattern can be changed.

[0181] Under the third observation condition, the display 1 shows Fig.21 The images corresponding to the first image display layer 22A, the second image display layer 22B, and the third image display layer 22C are shown.

[0182] Thus, the display 1 according to the first modification also displays different images under the first to third observation conditions. That is, the display 1 can display a special image. The partially hidden image displayed by the display 1 under the second observation condition can also function as a latent image. Furthermore, in the image displayed by the display 1 under the second observation condition, the shape and position of the moiré pattern can also be changed by tilting the display 1.

[0183] In addition, as described above, the image displayed by the display body 1 at the position of the first image display layer 22A includes moire under the second observation condition, but does not include moire under the third observation condition. In contrast, the image displayed by the display body 1 at the positions of the second image display layer 22B and the third image display layer 22C is substantially equal under the second observation condition and the third observation condition. That is, the second image display layer 22B and the third image display layer 22C highlight the changes in the above-mentioned image generated at the position of the first image display layer 22A.

[0184] <Second Modification>

[0185] Reference Figure 23 to Figure 25 A second modification example will be described.

[0186] Fig.23 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0187] Fig.24 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0188] Fig.25 It is a schematic diagram showing Fig.23 The mask layer and Fig.24 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0189] In addition to the mask layer 10 and the image holding body 20 respectively using Fig.23 and Fig.24 The display body 1 according to the second modification example is the same as the display body 1 according to the first embodiment except for the structure shown.

[0190] The first main surface S1 does not include the second scattering region SR2, the first flat region FR1, and the second flat region FR2, and the reflective layer 12 does not include the second portion P2, the third portion P3, and the fourth portion P4. Fig.23 The mask layer 10 is the same as the mask layer 10 of the display body 1 according to the first embodiment.

[0191] That is, in Fig.23In the mask layer 10, the first strip-shaped portions BP1 and the second strip-shaped portions BP2 extending in the X direction are alternately arranged in the Y direction over the entire first main surface S1. The second strip-shaped portions BP2 are provided with a scattering structure that generates isotropic light scattering as a relief structure RS.

[0192] The first main surface S1 is covered with a reflective layer 12 as a metal layer. The reflective layer 12 is opened at the position of the first strip-shaped portion BP1. That is, the reflective layer 12 is provided with slits SL extending along the X direction at the position of the first strip-shaped portion BP1. The width and pitch of the slits SL are equal to each other.

[0193] Fig.24 The image holder 20 includes a first display area PR1 and a second display area PR2. The first display area PR1 and the second display area PR2 each include a plurality of cells C. These cells C are arranged in the length direction and the width direction of the slit SL. That is, the cells C constitute an imaginary two-dimensional grid (here, a square grid or a rectangular grid). The arrangement pitch of the cells C in the width direction of the slit SL is equal to the arrangement pitch of the slit SL.

[0194] The colored portion 22P is arranged in the cell C. That is, each colored portion 22P is located on a lattice point of a virtual two-dimensional lattice.

[0195] More specifically, in the first display region PR1, the colored portion 22P is not arranged in the cell C of the 2n-1th row (n is a natural number) among the rows composed of the cells C arranged in the X direction. In the first display region PR1, each colored portion 22P is located in the cell C of the 2nth row among the rows composed of the cells C arranged in the X direction.

[0196] On the other hand, in the second display region PR2, the colored portions 22P are not arranged in the cells C of the 2nth row among the rows composed of the cells C arranged in the X direction. In the second display region PR2, each colored portion 22P is located in the cells C of the 2n-1th row among the rows composed of the cells C arranged in the X direction.

[0197] In addition to the above aspects, Fig.21 The image holding body 20 is the same as the image holding body 20 of the display body 1 according to the first embodiment.

[0198] The colors of the colored portions 22P in the first display area PR1 may be the same or different. Similarly, the colors of the colored portions 22P in the second display area PR2 may be the same or different. In addition, the colors of the colored portions 22P in the first display area PR1 and the colored portions 22P in the second display area PR2 may be the same or different. Here, as an example, the colored portions 22P in the first display area PR1 and the second display area PR2 are black.

[0199] In addition, in the first display region PR1, the coloring section 22P may be arranged in all cells C in the 2nth row or in only a part of the cells C in the 2nth row. On the other hand, in the second display region PR2, the coloring section 22P may be arranged in all cells C in the 2n-1th row or in only a part of the cells C in the 2n-1th row. Here, as an example, the coloring section 22P is arranged in all cells C in the 2nth row in the first display region PR1, and is arranged in all cells C in the 2n-1th row in the second display region PR2.

[0200] Under the first observation condition, the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 of the display body 1 according to the second modification example both appear bright. For example, the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 both appear white.

[0201] Under the second observation condition, for example, Fig.25 As shown, the mask layer 10 conceals the colored portion 22P in the second display region PR2 without concealing the colored portion 22P in the first display region PR1. As a result, a partially concealed image is displayed in which the portion corresponding to the first display region PR1 becomes darker and the portion corresponding to the second display region PR2 becomes brighter. For example, the portion corresponding to the first display region PR1 in the display body 1 appears black, and the portion corresponding to the second display region PR2 appears white.

[0202] And, as referenced Fig.14 As described above, when the display body 1 is tilted under the second observation condition, the area of ​​the portion hidden by the mask layer 10 among the colored portion 22P in the first display region PR1 increases, and the area of ​​the portion hidden by the mask layer 10 among the colored portion 22P in the second display region PR2 decreases. As a result, for example, a partially hidden image is displayed in which the portion corresponding to the first display region PR1 becomes brighter and the portion corresponding to the second display region PR2 becomes darker. For example, the portion corresponding to the first display region PR1 of the display body 1 appears white, and the portion corresponding to the second display region PR2 appears black.

[0203] Under the third observation condition, both the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2 of the display body 1 appear dark. For example, both the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2 appear black.

[0204] Thus, the display 1 according to the second modification also displays different images under the first to third observation conditions. That is, the display 1 can display a special image. In addition, the partially concealed image displayed by the display 1 under the second observation condition can also function as a latent image.

[0205] Furthermore, as described above, in the partially concealed image displayed by the display body 1 under the second observation condition, by tilting the display body 1, a unique color change occurs in each of the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2.

[0206] <Third Modification>

[0207] Reference Figure 26 to Figure 28 A third modification example will be described.

[0208] Fig.26 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0209] Fig. 27 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0210] Fig.28 It is a schematic diagram showing Fig.26 The mask layer and Fig. 27 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition.

[0211] In addition to the mask layer 10 and the image holding body 20 respectively using Fig.26 and Fig. 27 The display body 1 according to the third modification example is the same as the display body 1 according to the first embodiment except for the structure shown.

[0212] The first main surface S1 does not include the second scattering region SR2, the first flat region FR1, and the second flat region FR2, and the reflective layer 12 does not include the second portion P2, the third portion P3, and the fourth portion P4. Fig.26 The mask layer 10 of the display body 1 according to the first embodiment is almost the same as the mask layer 10 of the display body 1 according to the first embodiment.

[0213] That is, in Fig.26In the mask layer 10, the first strip-shaped portion BP1 and the second strip-shaped portion BP2 extending in the X direction are alternately arranged in the Y direction on the entire first main surface S1. The width of the second strip-shaped portion BP2 is twice that of the first strip-shaped portion BP1. The second strip-shaped portion BP2 is provided with a scattering structure that generates isotropic light scattering as a relief structure RS.

[0214] The first main surface S1 is covered with a reflective layer 12 as a metal layer. The reflective layer 12 is opened at the position of the first strip-shaped portion BP1. That is, the reflective layer 12 is provided with slits SL extending along the X direction at the position of the first strip-shaped portion BP1. The pitch of the slits SL is three times the width of the slits SL.

[0215] Fig. 27 The image holder 20 includes a first display area PR1 and a second display area PR2. The first display area PR1 and the second display area PR2 each include a plurality of cells C. These cells C are arranged in the length direction and the width direction of the slit SL. That is, the cells C constitute an imaginary two-dimensional grid (here, a square grid or a rectangular grid). The arrangement pitch of the cells C in the width direction of the slit SL is 1 / 3 of the arrangement pitch of the slit SL.

[0216] The image display layer 22 includes a first coloring portion 22P1, a second coloring portion 22P2, and a third coloring portion 22P3 as coloring portions 22P. The first coloring portion 22P1, the second coloring portion 22P2, and the third coloring portion 22P3 have visible light transmittance, and have different transmission spectra in the visible light region. Here, as an example, when illuminated with white light, the first coloring portion 22P1 transmits cyan light, the second coloring portion 22P2 transmits yellow light, and the third coloring portion 22P3 transmits magenta light.

[0217] The first colored portion 22P1 , the second colored portion 22P2 , and the third colored portion 22P3 are arranged in the cell C. That is, the first colored portion 22P1 , the second colored portion 22P2 , and the third colored portion 22P3 are all located on lattice points of a virtual two-dimensional lattice.

[0218] More specifically, in the first display region PR1, the cells C in the 3n-1th row (n is a natural number) among the rows composed of the cells C arranged in the X direction are cells for the first coloring section 22P1, the cells C in the 3nth row are cells for the second coloring section 22P2, and the cells C in the 3n+1th row are cells for the third coloring section 22P3. That is, in the first display region PR1, each of the first coloring sections 22P1 is not located in the cells C in the 3nth row and the 3n+1th row among the rows composed of the cells C arranged in the X direction, but is located in the cells C in the 3n-1th row. In addition, in the first display region PR1, each of the second coloring sections 22P2 is not located in the cells C in the 3n-1th row and the 3n+1th row among the rows composed of the cells C arranged in the X direction, but is located in the cells C in the 3nth row. Furthermore, in the first display region PR1, each third colored portion 22P3 is located in the cell C of the 3n+1th row, not in the cell C of the 3n-1th row and the 3nth row, among the rows each consisting of the cells C arranged in the X direction.

[0219] On the other hand, in the second display region PR2, among the rows composed of the cells C arranged in the X direction, the cells C in the 3n-2th row are cells for the first coloring section 22P1, the cells C in the 3n-1th row are cells for the second coloring section 22P2, and the cells C in the 3nth row are cells for the third coloring section 22P3. That is, in the second display region PR2, each of the first coloring sections 22P1 is not located in the cells C in the 3n-1th row and the 3nth row among the rows composed of the cells C arranged in the X direction, but is located in the cells C in the 3n-2th row. In addition, in the second display region PR2, each of the second coloring sections 22P2 is not located in the cells C in the 3n-2th row and the 3nth row among the rows composed of the cells C arranged in the X direction, but is located in the cells C in the 3n-1th row. Furthermore, in the second display region PR2, each third colored portion 22P3 is located in the cell C of the 3n row, not in the cell C of the 3n-2nd and 3n-1th rows, among the rows each consisting of the cells C arranged in the X direction.

[0220] In addition to the above aspects, Fig.21 The image holding body 20 is the same as the image holding body 20 of the display body 1 according to the first embodiment.

[0221] In the first display region PR1, the first coloring portion 22P1 may be arranged in all cells C in the 3n-1 row or only in a part of the cells C in the 3n-1 row. In the first display region PR1, the second coloring portion 22P2 may be arranged in all cells C in the 3n row or only in a part of the cells C in the 3n row. Furthermore, in the first display region PR1, the third coloring portion 22P3 may be arranged in all cells C in the 3n+1 row or only in a part of the cells C in the 3n+1 row.

[0222] Similarly, in the second display region PR2, the first coloring portion 22P1 may be arranged in all cells C in the 3n-2 row, or may be arranged in only a part of the cells C in the 3n-2 row. In the second display region PR2, the second coloring portion 22P2 may be arranged in all cells C in the 3n-1 row, or may be arranged in only a part of the cells C in the 3n-1 row. Furthermore, in the second display region PR2, the third coloring portion 22P3 may be arranged in all cells C in the 3n row, or may be arranged in only a part of the cells C in the 3n row.

[0223] Here, as an example, the first coloring section 22P1, the second coloring section 22P2, and the third coloring section 22P3 may be arranged as follows. That is, the first coloring section 22P1 is arranged in all cells C of the 3n-1 row in the first display region PR1, and in all cells C of the 3n-2 row in the second display region PR2. The second coloring section 22P2 is arranged in all cells C of the 3n row in the first display region PR1, and in all cells C of the 3n-1 row in the second display region PR2. The third coloring section 22P3 is arranged in all cells C of the 3n+1 row in the first display region PR1, and in all cells C of the 3n row in the second display region PR2.

[0224] Under the first observation condition, the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 of the display body 1 according to the third modification example both appear bright. For example, the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 both appear white.

[0225] It should be noted that, as described above, the spacing of the slits SL is three times the width of the slits SL. That is, the width of the portion sandwiched by the adjacent slits SL in the reflective layer 12 is greater than the width of the slits SL. Therefore, the area of ​​the relief structure RS can be increased. The portion corresponding to the relief structure RS in the image displayed under the first observation condition can be brighter.

[0226] Under the second observation condition, for example, Fig.25 As shown, the mask layer 10 conceals the second coloring portion 22P2 and the third coloring portion 22P3 in the first display area PR1 and the first coloring portion 22P1 and the third coloring portion 22P3 in the second display area PR2 without concealing the first coloring portion 22P1 in the first display area PR1 and the second coloring portion 22P2 in the second display area PR2. As a result, a partially concealed image is displayed in which the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 have different colors. For example, the portion corresponding to the first display area PR1 in the display body 1 appears cyan, and the portion corresponding to the second display area PR2 appears yellow.

[0227] As reference Fig.14 As described above, when the display body 1 is tilted under the second observation condition, for example, the area of ​​the portion hidden by the mask layer 10 in the second colored portion 22P2 in the first display region PR1 and the area of ​​the portion hidden by the mask layer 10 in the third colored portion 22P3 in the second display region PR2 increase, and the area of ​​the portion hidden by the mask layer 10 in the first colored portion 22P1 in the first display region PR1 and the area of ​​the portion hidden by the mask layer 10 in the second colored portion 22P2 in the second display region PR2 decrease. As a result, for example, the portion corresponding to the first display region PR1 appears yellow, and the portion corresponding to the second display region PR2 appears magenta.

[0228] When the display body 1 is further tilted under the second observation condition, for example, the area of ​​the portion hidden by the mask layer 10 among the third colored portion 22P3 in the first display region PR1 and the area of ​​the portion hidden by the mask layer 10 among the first colored portion 22P1 in the second display region PR2 increase, and the area of ​​the portion hidden by the mask layer 10 among the second colored portion 22P2 in the first display region PR1 and the area of ​​the portion hidden by the mask layer 10 among the first colored portion 22P1 in the second display region PR2 decrease. As a result, for example, the portion corresponding to the first display region PR1 appears to be magenta, and the portion corresponding to the second display region PR2 appears to be cyan.

[0229] Under the third observation condition, the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2 of the display body 1 appear to be the same color. For example, subtractive color mixing of cyan, yellow, and magenta occurs, so that the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2 both appear to be black.

[0230] Thus, the display 1 according to the third modification also displays different images under the first to third observation conditions. That is, the display 1 can display a special image. In addition, the partially concealed image displayed by the display 1 under the second observation condition can also function as a latent image.

[0231] Furthermore, as described above, in the partially concealed image displayed by the display body 1 under the second observation condition, by tilting the display body 1, the portion corresponding to the first display area PR1 and the portion corresponding to the second display area PR2 each undergo a unique color change.

[0232] <Fourth Modification>

[0233] In the third modification, the arrangement pitch of the cells C in the width direction of the slits SL is set to 1 / 3 of the arrangement pitch of the slits SL. That is, in the third modification, the arrangement pitch of the slits SL is set to 3 times the arrangement pitch of the cells C in the width direction of the slits SL. The fourth modification is the same as the third modification except that the arrangement pitch of the slits SL is offset from 3 times the arrangement pitch of the cells C in the width direction of the slits SL.

[0234] For example, when the arrangement pitch of the slits SL is shifted from 3m times (m is a natural number) the arrangement pitch of the cells C in the width direction of the slits SL, in each of the first display region PR1 and the second display region PR2, the relative positions of the first coloring portion 22P1, the second coloring portion 22P2, and the third coloring portion 22P3 with respect to the slits SL change in the arrangement direction of the slits SL. Therefore, when this structure is adopted, the color of the partially concealed image displayed under the second observation condition changes in the arrangement direction of the slits SL in each of the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2. That is, when the above structure is adopted, the partially concealed image displayed under the second observation condition has rainbow stripes in each of the portion corresponding to the first display region PR1 and the portion corresponding to the second display region PR2.

[0235] The arrangement pitch PP1 of the slits SL and the arrangement pitch PP2 of the cells C in the width direction of the slits SL preferably satisfy the relationship represented by the following inequality (1) or (2).

[0236] 0%<(PP1-3×PP2) / (3×PP2)<25%···(1)

[0237] 0%<(3×PP2-PP1) / (3×PP2)<25%···(2)

[0238] When the pitch PP1 increases by an offset amount from 3 times the pitch PP2, the stripe pitch in the rainbow stripes decreases. Therefore, when observing the partially hidden image displayed under the second observation condition, it is difficult to distinguish the portion corresponding to the first display area PR1 from the portion corresponding to the second display area PR2.

[0239] <Fifth Modification>

[0240] Reference Figures 29 to 34 The fifth modification example will be described.

[0241] Fig.29 FIG. 1 is a plan view schematically showing another example of a structure that the mask layer can adopt.

[0242] Fig.30 It is a plan view schematically showing another example of a structure that can be adopted by the image holding member.

[0243] Fig.31 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of an example of a situation in which a display body of an image holding body displays an image under a second observation condition. Fig.32 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition. Fig.33 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition. Fig.34 It is a schematic diagram showing Fig.29 The mask layer and Fig.30 A plan view of another example of a situation in which a display body of an image holding body displays an image under the second observation condition.

[0244] In addition to the mask layer 10 and the image holding body 20 respectively using Fig.29 and Fig.30 The display body 1 according to the fifth modification example is the same as the display body 1 according to the first embodiment except for the structure shown.

[0245] The first main surface S1 does not include the second scattering region SR2, the first flat region FR1, and the second flat region FR2, and the reflective layer 12 does not include the second portion P2, the third portion P3, and the fourth portion P4. Fig.29 The mask layer 10 of the display body 1 according to the first embodiment is almost the same as the mask layer 10 of the display body 1 according to the first embodiment.

[0246] That is, in Fig.29In the mask layer 10, the first strip-shaped portion BP1 and the second strip-shaped portion BP2 extending in the X direction are alternately arranged in the Y direction on the entire first main surface S1. The width of the second strip-shaped portion BP2 is three times that of the first strip-shaped portion BP1. The second strip-shaped portion BP2 is provided with a scattering structure that generates isotropic light scattering as a relief structure RS.

[0247] The first main surface S1 is covered with a reflective layer 12 as a metal layer. The reflective layer 12 is opened at the position of the first strip-shaped portion BP1. That is, the reflective layer 12 is provided with slits SL extending along the X direction at the position of the first strip-shaped portion BP1. The pitch of the slits SL is four times the width of the slits SL.

[0248] Fig.30 The image holder 20 includes a first display area PR1 and a second display area PR2. The first display area PR1 and the second display area PR2 each include a plurality of cells C. These cells C are arranged in the length direction and the width direction of the slit SL. That is, the cells C constitute an imaginary two-dimensional grid (here, a square grid or a rectangular grid). The arrangement pitch of the cells C in the width direction of the slit SL is 1 / 4 of the arrangement pitch of the slit SL.

[0249] The cell C comprises a plurality of strip regions BR each consisting of a first sub-region SBR1, a second sub-region SBR2, a third sub-region SBR3, and a fourth sub-region SBR4. The strip regions BR have a shape extending in the longitudinal direction of the slit SL and are arranged in the width direction of the slit SL.

[0250] In each strip-shaped region BR, the first sub-region SBR1, the second sub-region SBR2, the third sub-region SBR3, and the fourth sub-region SBR4 have shapes extending in the length direction of the slit SL. In each strip-shaped region BR, the first sub-region SBR1, the second sub-region SBR2, the third sub-region SBR3, and the fourth sub-region SBR4 are arranged in sequence in the width direction of the slit SL. The first sub-region SBR1, the second sub-region SBR2, the third sub-region SBR3, and the fourth sub-region SBR4 are each composed of cells C arranged in a row in the length direction of the slit SL.

[0251] The colored portion 22P is arranged in the cell C. That is, each colored portion 22P is located at a lattice point of a virtual two-dimensional lattice. Here, as an example, the colored portion 22P is black.

[0252] In each band-shaped region BR, the coloring portion 22P is arranged in a part of the plurality of cells C constituting the first sub-region SBR1, and the coloring portion 22P is not arranged in the remaining cells C. One or more band-shaped regions BR may include the first sub-region SBR1 in which the coloring portion 22P is not arranged in any of the plurality of cells C, or may include the first sub-region SBR1 in which the coloring portion 22P is arranged in all of the plurality of cells C.

[0253] In each strip region BR, the configuration of the coloring portion 22P in the second sub-region SBR2 is slightly different from the configuration of the coloring portion 22P in the first sub-region SBR1 included in the strip region BR. In one or more strip regions BR, the configuration of the coloring portion 22P in the second sub-region SBR2 may be equal to the configuration of the coloring portion 22P in the first sub-region SBR1 included in the strip region BR.

[0254] In each strip region BR, the configuration of the coloring portion 22P in the third sub-region SBR3 is slightly different from the configuration of the coloring portion 22P in the second sub-region SBR2 included in the strip region BR. In one or more strip regions BR, the configuration of the coloring portion 22P in the third sub-region SBR3 may be equal to the configuration of the coloring portion 22P in the second sub-region SBR2 included in the strip region BR.

[0255] In each strip region BR, the configuration of the coloring portion 22P in the fourth sub-region SBR4 is slightly different from the configuration of the coloring portion 22P in the third sub-region SBR3 included in the strip region BR. In one or more strip regions BR, the configuration of the coloring portion 22P in the fourth sub-region SBR4 may be equal to the configuration of the coloring portion 22P in the third sub-region SBR3 included in the strip region BR.

[0256] In addition to the above aspects, Fig.21 The image holding body 20 is the same as the image holding body 20 of the display body 1 according to the first embodiment.

[0257] Under the first observation condition, the display 1 according to the fifth modification example appears bright as a whole. For example, the display 1 appears white as a whole.

[0258] Under the second observation condition, for example, Fig.31 As shown, the mask layer 10 conceals the second sub-region SBR2, the third sub-region SBR3 and the fourth sub-region SBR4 of each strip-shaped region BR without concealing the first sub-region SBR1 of each strip-shaped region BR. As a result, a first partially concealed image including a black pattern corresponding to the arrangement of the coloring portions 22P arbitrarily arranged in the first sub-region SBR1 is displayed.

[0259] As reference Fig.14 As described above, when the display body 1 is tilted under the second observation condition, the area of ​​the portion hidden by the mask layer 10 in the first sub-region SBR1 in each strip-shaped region BR increases, and the area of ​​the portion hidden by the mask layer 10 in the second sub-region SBR2 in each strip-shaped region BR decreases. Fig.32 As shown, the mask layer 10 conceals the first sub-region SBR1, the third sub-region SBR3 and the fourth sub-region SBR4 of each strip-shaped region BR without concealing the second sub-region SBR2 of each strip-shaped region BR. As a result, a second partially concealed image including a black pattern corresponding to the arrangement of the coloring portions 22P arbitrarily arranged in the second sub-region SBR2 is displayed.

[0260] When the display body 1 is further tilted under the second observation condition, the area of ​​the portion hidden by the mask layer 10 in the second sub-region SBR2 in each strip-shaped region BR increases, and the area of ​​the portion hidden by the mask layer 10 in the third sub-region SBR3 in each strip-shaped region BR decreases. Fig.33 As shown, the mask layer 10 conceals the first sub-region SBR1, the second sub-region SBR2 and the fourth sub-region SBR4 of each strip-shaped region BR without concealing the third sub-region SBR3 of each strip-shaped region BR. As a result, a third partially concealed image including a black pattern corresponding to the arrangement of the coloring portions 22P arbitrarily arranged in the third sub-region SBR3 is displayed.

[0261] When the display body 1 is further tilted under the second observation condition, the area of ​​the portion hidden by the mask layer 10 in the third sub-region SBR3 in each strip-shaped region BR increases, and the area of ​​the portion hidden by the mask layer 10 in the fourth sub-region SBR4 in each strip-shaped region BR decreases. Fig.34 As shown, the mask layer 10 conceals the first sub-region SBR1, the second sub-region SBR2 and the third sub-region SBR3 of each strip-shaped region BR without concealing the fourth sub-region SBR4 of each strip-shaped region BR. As a result, a fourth partially concealed image including a black pattern corresponding to the arrangement of the coloring portions 22P arbitrarily arranged in the fourth sub-region SBR4 is displayed.

[0262] As described above, the configuration of the coloring portion 22P in the second sub-region SBR2 of each strip region BR is slightly different from the configuration of the coloring portion 22P in the first sub-region SBR1 included in the strip region BR, or is equal to the configuration according to the circumstances. In addition, the configuration of the coloring portion 22P in the third sub-region SBR3 of each strip region BR is slightly different from the configuration of the coloring portion 22P in the second sub-region SBR2 included in the strip region BR, or is equal to the configuration according to the circumstances. Furthermore, the configuration of the coloring portion 22P in the fourth sub-region SBR4 of each strip region BR is slightly different from the configuration of the coloring portion 22P in the third sub-region SBR3 included in the strip region BR, or is equal to the configuration according to the circumstances. Therefore, for an observer who observes the first to fourth partially concealed images displayed in sequence by changing the inclination angle of the display body 1 under the second observation condition, the position and / or shape of the black pattern in the partially concealed image appears to change continuously.

[0263] Under the third observation condition, the portion of the display 1 corresponding to the image display layer 22 appears dark, and the other portions appear bright. For example, the portion corresponding to the image display layer 22 appears black, and the other portions appear white.

[0264] Thus, the display 1 according to the fifth modification also displays different images under the first to third observation conditions. That is, the display 1 can display a special image. In addition, the partially concealed image displayed by the display 1 under the second observation condition can also function as a latent image.

[0265] Furthermore, as described above, in the partially concealed image displayed under the second observation condition by the display 1, the pattern position and / or shape changes by tilting the display 1. That is, the display 1 can display a moving image under the second observation condition, for example.

[0266] <Other Modifications>

[0267] Two or more of the techniques described in the above-mentioned embodiments and modifications may be combined with each other.

[0268] For example, in the third to fifth modified examples, the width of the portion sandwiched by the adjacent slits SL in the reflective layer 12 is greater than the width of the slits SL. That is, in the third to fifth modified examples, the width of the second strip-shaped portion BP2 is greater than the width of the first strip-shaped portion BP1. This structure can also be adopted in the first and second embodiments and the first and second modified examples.

[0269] As described above, when the width of the portion sandwiched between adjacent slits SL in the reflective layer 12 is made larger than the width of the slit SL, the area of ​​the relief structure can be increased. Therefore, the portion corresponding to the relief structure in the image displayed under the first observation condition can be brighter.

[0270] The ratio of the width of the portion sandwiched between adjacent slits SL in the reflective layer 12 to the width of the slit SL, that is, the ratio of the width of the second strip-shaped portion BP2 to the width of the first strip-shaped portion BP1, is preferably not more than 6. When this ratio increases, the visibility of the partially hidden image under the second observation condition decreases.

[0271] In addition, various modifications may be made to the configurations and the like described in the above-mentioned embodiment and modified examples.

[0272] For example, in the display body 1 according to the first embodiment, the second part P2 and the fourth part P4 of the reflective layer 12 may be provided with slits having different length directions from the first slit SL1 and the second slit SL2 and having the same width and pitch as the first slit SL1 and the second slit SL2. When such slits are provided in the second part P2 and the fourth part P4, and the relief structure RS is provided on the entire portion of the second part P2 sandwiched by the slits, the second part P2 and the fourth part P4 have substantially the same reflection characteristics as the first part P1 and the third part P3, respectively. Therefore, even when the display body 1 is tilted under the first observation condition to visually recognize the regular reflected light, the portion corresponding to the second part P2 and the portion corresponding to the fourth part P4 appear to be almost as bright as the portion corresponding to the first part P1 and the portion corresponding to the third part P3, respectively. In addition, since the slits arranged in the second part P2 and the fourth part P4 have a different length direction from the first slit SL1 and the second slit SL2, the portions corresponding to the second part P2 and the fourth part P4 in the partially hidden image displayed under the second observation condition can be distinguished from the portions corresponding to the first part P1 and the third part P3.

[0273] Similarly, in the display body 1 according to the second embodiment, the second portion P2, the fourth portion P4, and the sixth portion P6 of the reflective layer 12 may be provided with slits having different length directions from the first slit SL1 and the second slit SL2 and having the same width and pitch as the first slit SL1 and the second slit SL2. When such slits are provided in the second portion P2, the fourth portion P4, and the sixth portion P6, and the first anisotropic scattering structure RS1 is provided on the entire portion of the second portion P2 sandwiched by the slits, and the second anisotropic scattering structure RS2 is provided on the entire portion of the sixth portion P6 sandwiched by the slits, the second portion P2, the fourth portion P4, and the sixth portion P6 have substantially the same reflection characteristics as the first portion P1, the third portion P3, and the fifth portion P5, respectively. Therefore, even when the display body 1 is tilted to visually recognize the regular reflected light under the first observation condition, the portion corresponding to the second portion P2, the portion corresponding to the fourth portion P4, and the portion corresponding to the sixth portion P6 appear to be almost as bright as the portion corresponding to the first portion P1, the portion corresponding to the third portion P3, and the portion corresponding to the fifth portion P5, respectively. In addition, since the slits provided in the second portion P2, the fourth portion P4, and the sixth portion P6 have different length directions from the first slit SL1 and the second slit SL2, the portions corresponding to the second portion P2, the fourth portion P4, and the sixth portion P6 of the partially concealed image displayed under the second observation condition can be distinguished from the portions corresponding to the first portion P1, the third portion P3, and the fifth portion P5.

[0274] As a relief structure, a light deflecting structure such as a blazed diffraction grating that emits strong reflected light at an angle different from the regular reflection angle may be provided instead of providing a scattering structure that produces isotropic light scattering or an anisotropic scattering structure that exhibits anisotropic light scattering.

[0275] In the above-mentioned modification, the shape of the colored portion 22P arranged in the cell C is a rectangle or a square. The shape of these colored portions 22P may be another shape such as a circle.

[0276] In the display 1 according to the above-mentioned embodiment and modification, the image display layer 22 is a printed layer containing at least one of a dye and a pigment. The image display layer 22 may be a layer that displays a transmitted light image by a transmission type hologram and / or a diffraction grating.

[0277] In the display body 1 involved in the above-mentioned embodiment and modification, under the second observation condition, the image display layer 22 is designed to display a two-dimensional image as a partially concealed image. Under the second observation condition, the image display layer 22 may also be designed to display a three-dimensional image as a partially concealed image. Such a three-dimensional image may be displayed using a transmission-type hologram and / or a diffraction grating.

[0278] The display body 1 involved in the above-mentioned embodiment and modification example has a structure in which the mask layer 10 and the image holding body 20 are adhered together in such a manner that the adhesive layer 30 is sandwiched therebetween. The adhesive layer 30 and the transparent material layer 11 may be omitted from the display body 1, and a relief structure RS or a first anisotropic scattering structure RS1 and a second anisotropic scattering structure RS2 may be provided on the surface of the transparent substrate 21 (specifically, the back surface of the surface on which the image display layer 22 is provided), and a reflective layer 12 may be provided thereon.

[0279] As the reflective layer 12, an inorganic dielectric layer such as a transparent oxide layer may be provided instead of the metal layer. Alternatively, the reflective layer 12 may be omitted. If the combination of the transparent material layer 11 and the layer covering the surface provided with the relief structure has a reflection characteristic with a brightness exceeding 1 in the entire region of the reflection angle range of 10° or more and less than 90°, for example, the relief structure can exert a sufficiently high optical effect. That is, under the first observation condition, the image from the relief structure is displayed with high visibility, and under the second observation condition, the portion of the transmitted light image corresponding to the second band-shaped portion is sufficiently concealed by the mask layer.

[0280] The display body 1 can be used as an identification (ID) card such as an employee ID card, a driver's license, and a student ID card, or can be used as a valuable security such as a bank note, a stock certificate, a gift certificate, a ticket, and an admission ticket.

[0281] Example

[0282] A transfer foil including a mask layer 10 having the same structure as that of reference 1 is manufactured by the method described below. Figures 15 to 17 A structure similar to the one described above.

[0283] First, an acrylic release material was applied on a 16 μm thick substrate made of polyethylene terephthalate by gravure coating to form a release layer. The release layer had a thickness of 1 μm after drying.

[0284] Next, a two-component curable urethane resin was coated on the peeling layer using a gravure coating method, and the coating was dried. The thickness of the dried coating was 1 μm. By pressing an embossed plate heated to 2000° C. on the dried film, the first anisotropic scattering structure RS1 and the second anisotropic scattering structure RS2 were formed. In the above manner, a transparent material layer 11 having the first anisotropic scattering structure RS1 and the second anisotropic scattering structure RS2 on the surface was obtained.

[0285] Next, aluminum was deposited to a thickness of 50 nm on the transparent material layer 11 to form a metal layer. The metal layer was processed into a stripe pattern using a laser marker (manufactured by Keyence Corp.) to obtain a reflective layer 12.

[0286] Here, not only the first part P1, the third part P3, and the fifth part P5, but also the second part P2, the fourth part P4, and the sixth part are processed into a stripe pattern. In the first part P1, the third part P3, and the fourth part P4, the length direction of the line constituting the stripe pattern is set to be parallel to the X direction. On the other hand, in the second part P2, the fourth part P4, and the sixth part P6, the length direction of the line constituting the stripe pattern is set to be parallel to the Y direction. In any stripe pattern, the line width is set to 125 μm and the line spacing is set to 250 μm.

[0287] In the above manner, a transfer foil in which the mask layer 10 is provided on the substrate is obtained.

[0288] On the one hand, a transfer foil was obtained in the above manner, and on the other hand, a card having a thickness of 1 mm made of a cured product of a polycarbonate resin was prepared as a transparent substrate 21. Then, by roller transfer using a rubber roller whose surface temperature was set to 200° C., the mask layer 10 was transferred from the substrate of the transfer foil to one main surface of the transparent substrate 21. It should be noted that an adhesive layer 30 was previously provided on the main surface of the transparent substrate 21.

[0289] Next, using a card printer, a reference Fig. 27 The image display layer 22 is illustrated.

[0290] Specifically, first, prepare an intermediate transfer medium. The intermediate transfer medium includes a base film and a protective layer 23 and an image receiving layer and adhesive layer sequentially arranged thereon. Then, the first coloring portion 22P1, the second coloring portion 22P2 and the third coloring portion 22P3 are configured on the image receiving layer and adhesive layer by transfer using a thermal head. The diameter of each of the first coloring portion 22P1, the second coloring portion 22P2 and the third coloring portion 22P3 is set to 40 μm. The spacing in the Y direction of unit C is set to 125 / 3 μm.

[0291] The intermediate transfer medium having the image recorded thereon is overlapped with the laminate including the mask layer 10 and the transparent substrate 21 so that the image receiving layer / adhesive layer contacts the transparent substrate 21. Then, the laminate including the protective layer 23, the image receiving layer / adhesive layer, the first coloring portion 22P1, the second coloring portion 22P2, and the third coloring portion 22P3 is thermally transferred onto the transparent substrate 21 using a heat roller.

[0292] The display 1 was obtained in the above manner.

[0293] exist Fig.10 The display 1 is observed under the first observation condition shown in FIG. As a result, the portion of the display 1 corresponding to the first scattering region SR1 and the second scattering region SR2 emits strong scattered light and appears bright. On the other hand, the portion of the display 1 corresponding to the third scattering region SR3 and the fourth scattering region SR4 emits almost no scattered light and appears dark. Furthermore, the portion of the display 1 corresponding to the first flat region FR1 and the second flat region FR2 does not emit scattered light and appears as bright as the portion corresponding to the third scattering region SR3 and the fourth scattering region SR4.

[0294] Then, if Fig.18 As shown in FIG. 1 , the display 1 is observed under the same conditions except that the display 1 is rotated 90° around an axis parallel to the Z direction. As a result, the portion of the display 1 corresponding to the first scattering region SR1 and the second scattering region SR2 emits almost no scattered light and appears dark. On the other hand, the portion of the display 1 corresponding to the third scattering region SR3 and the fourth scattering region SR4 emits strong scattered light and appears bright. Furthermore, the portion of the display 1 corresponding to the first flat region FR1 and the second flat region FR2 does not emit scattered light and appears as bright as the portion corresponding to the first scattering region SR1 and the second scattering region SR2.

[0295] In addition, Fig.14 The display 1 is observed under the second observation condition shown.

[0296] As a result, the portion where the first display region PR1 overlaps with the first part P1 , the portion where the first display region PR1 overlaps with the third part P3 , and the portion where the first display region PR1 overlaps with the fifth part P5 appear to have the same color.

[0297] In addition, the portion where the second display area PR2 overlaps with the first portion P1, the portion where the second display area PR2 overlaps with the third portion P3, and the portion where the second display area PR2 overlaps with the fifth portion P5 appear to have the same color. The colors of these portions are different from the colors of the portion where the first display area PR1 overlaps with the first portion P1, the portion where the first display area PR1 overlaps with the third portion P3, and the portion where the first display area PR1 overlaps with the fifth portion P5.

[0298] Furthermore, the portion where the first display area PR1 overlaps with the second portion P2, the portion where the first display area PR1 overlaps with the fourth portion P4, the portion where the first display area PR1 overlaps with the sixth portion P6, the portion where the second display area PR2 overlaps with the second portion P2, the portion where the second display area PR2 overlaps with the fourth portion P4, and the portion where the second display area PR2 overlaps with the sixth portion P6 appear to have the same color. The colors of these portions are different from the colors of the portion where the first display area PR1 overlaps with the first portion P1, the portion where the first display area PR1 overlaps with the third portion P3, and the portion where the first display area PR1 overlaps with the fifth portion P5; and any color of the portion where the second display area PR2 overlaps with the first portion P1, the portion where the second display area PR2 overlaps with the third portion P3, and the portion where the second display area PR2 overlaps with the fifth portion P5.

[0299] Finally, the display 1 was observed under the third observation condition. As a result, the entire display 1 appeared to have the same color.

[0300] Explanation of symbols

[0301] 1···display body, 10···mask layer, 11···transparent material layer, 12···reflective layer, 20···image holding body, 21···transparent substrate, 22···image display layer, 22A···first image display layer, 22B···second image display layer, 22C···third image display layer, 22P···coloring part, 22P1···first coloring part, 22P2···second coloring part, 22P3···third colored portion, 23···protective layer, 30···adhesive layer, BP1···first strip portion, BP2···second strip portion, BR···strip region, C···unit, FR1···first flat region, FR2···second flat region, G1···first groove, G2···second groove, IL···illumination light, LS···light source, OB···observer, P1···first 1st part, P2···2nd part, P3···3rd part, P4···4th part, P5···5th part, P6···6th part, PR1···1st display area, PR2···2nd display area, RL···reflected light, RS···relief structure, RS1···1st anisotropic scattering structure, RS2···2nd anisotropic scattering structure, S1···1st main surface, S2··· 2nd main surface, SBR1···1st sub-region, SBR2···2nd sub-region, SBR3···3rd sub-region, SBR4···4th sub-region, SL···slit, SL1···1st slit, SL2···2nd slit, SR1···1st scattering region, SR2···2nd scattering region, SR3···3rd scattering region, SR4···4th scattering region, TL···transmitted light.

Claims

1. A display body, comprising: an image display layer including one or more colored portions and displaying a transmitted light image corresponding to the one or more colored portions when illuminated with white light; and A mask layer comprises a transparent material layer having a first main surface and a second main surface, wherein the first main surface comprises one or more regions consisting of a first and a second strip-shaped portion each alternately arranged in a width direction, the second strip-shaped portion being provided with a relief structure, and a portion corresponding to at least one of the one or more regions concealing a portion of the transmitted light image corresponding to the second strip-shaped portion.

2. The display according to claim 1, wherein: The first main surface is separated from the image display layer.

3. The display according to claim 2, wherein: The distance from the first main surface to the image display layer is in the range of 50 μm to 2 mm.

4. The display according to any one of claims 1 to 3, wherein: The pitch P of the first strip-shaped portion B 1In the range of 50 to 500 μm.

5. The display according to any one of claims 1 to 3, wherein: The width W of the first strip-shaped portion B 1 and the width W of the second strip portion B 2 ratio W B 1 / W B 2 is in the range of 1 / 4 to 2.

6. The display according to any one of claims 1 to 3, wherein: In the partially concealed image in which the transmitted light image is partially concealed by the mask layer, at least one of the color and the shape changes by tilting the display body about an axis parallel to the lengthwise directions of the first and second strip-shaped portions.

7. The display according to any one of claims 1 to 3, wherein: The transmitted light image generates moiré by being partially concealed by the mask layer.

8. The display according to any one of claims 1 to 3, The invention further comprises a reflective layer covering the first main surface.

9. The display according to claim 8, wherein: The reflective layer includes a metal layer, and a portion of the metal layer corresponding to the at least one of the one or more regions is provided with a plurality of slits each opening along a longitudinal direction of the first strip-shaped portion at a position of the first strip-shaped portion.

10. The display according to any one of claims 1 to 3, wherein: In at least one of the one or more regions, the relief structure is a scattering structure.

11. The display according to any one of claims 1 to 3, wherein: In at least one of the one or more regions, the relief structure is an anisotropic scattering structure composed of a plurality of grooves arranged in the width direction.

12. The display according to claim 11, wherein: The one or more regions include two or more regions in which the relief structure is the anisotropic scattering structure, the longitudinal directions of the plurality of grooves are different from each other, and the arrangement directions of the first and second band-shaped portions are equal to each other.

13. The display according to any one of claims 1 to 3, further comprising a reflective layer covering the first main surface, The one or more regions include first and second scattering regions in which the scattering structures as the relief structures are provided in the second band-shaped portions, respectively. The first main surface further includes first and second flat regions, each of which is flat. The reflective layer comprises a metal layer, A first portion of the metal layer corresponding to the first scattering region is provided with a plurality of first slits each opening along the length direction of the first strip-shaped portion at the position of the first strip-shaped portion. A second portion of the metal layer corresponding to the second scattering region has no opening or has a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits. A third portion of the metal layer corresponding to the first flat region is provided with a plurality of second slits arranged in a width direction and having a length direction equal to that of the plurality of first slits. A fourth portion of the metal layer corresponding to the second flat region has no opening or has a plurality of slits arranged in a width direction and having a different length direction from that of the plurality of first slits.

14. The display according to any one of claims 1 to 3, further comprising a reflective layer covering the first main surface, The one or more regions include first to fourth scattering regions in which an anisotropic scattering structure composed of a plurality of grooves arranged in the width direction as the relief structure is provided in each of the second band-shaped portions. The first main surface further includes first and second flat regions, each of which is flat. The reflective layer comprises a metal layer, A first portion of the metal layer corresponding to the first scattering region is provided with a plurality of first slits each opening along the length direction of the first strip-shaped portion at the position of the first strip-shaped portion. A second portion of the metal layer corresponding to the second scattering region has no opening or has a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits. A third portion of the metal layer corresponding to the first flat region is provided with a plurality of second slits arranged in a width direction and having a length direction equal to that of the plurality of first slits. A fourth portion of the metal layer corresponding to the second flat region has no opening or has a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits. A fifth portion of the metal layer corresponding to the third scattering region is provided with a plurality of third slits each opening along the length direction of the first strip-shaped portion at the position of the first strip-shaped portion. A sixth portion of the metal layer corresponding to the fourth scattering region has no opening or has a plurality of slits arranged in a width direction and having a length direction different from that of the plurality of first slits. The width directions of the plurality of grooves of the first and second scattering regions are equal to each other, The width directions of the plurality of grooves in the third and fourth scattering regions are equal to each other and are different from the width directions of the plurality of grooves in the first and second scattering regions.

Images