Display body

Abstract

To provide a display technique capable of displaying a special image.SOLUTION: A display body 1A includes a transparent material layer 2 having a first main surface S1 and a second main surface S2, a light-shielding mask layer 3 provided on the first main surface S1 and having a plurality of light-transmitting portions 32 arranged regularly, and an image display layer provided on the second main surface S2. The image display layer includes a first layer 4G that displays a first color and a second layer 4B that displays a second color. The first layer 4G includes a plurality of first parts 41G that are observable through at least a portion of the light-transmitting portions 32 when viewed from a first direction. The second layer 4B includes a plurality of second parts 41B that are not observable through at least the portion of the light-transmitting portions 32 when viewed from the first direction, but are observable through at least the portion of the light-transmitting portions 32 when viewed from a second direction. The arrangement of the first parts 41G and the arrangement of the second parts 41B have the same shape, and the portions of the mask layer where light-transmitting portions are provided are in a lattice or checkered pattern.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to display technology. [Background technology]

[0002] In recent years, the performance of digital devices such as scanners, printers, and color copiers has improved, making it easy to create elaborate copies of valuable printed materials. To prevent such copying and counterfeiting, anti-counterfeiting technologies are needed. Among the aforementioned anti-counterfeiting technologies, there is a particular need for anti-counterfeiting technologies, such as watermarks and holograms, that do not require tools and allow anyone who holds a printed material to distinguish its authenticity.

[0003] One of the anti-counterfeiting technologies that allows for tool-free authentication is the use of optically variable inks containing functional pigments (also known as optical interference pigments) that change color in response to changes in light interference conditions. Images displayed on printed layers formed using these inks change color in response to changes in the lighting direction or observation direction, allowing discriminators to determine the authenticity of printed materials by checking the color change.

[0004] Typical examples of optically variable inks include pearl ink and OVI (Optical Variable Ink), which are used on banknotes. Images printed using the former change from colorless to pink, for example, as the lighting direction or viewing direction changes. Images printed using the latter change from blue-green to purple, for example, as the lighting direction or viewing direction changes.

[0005] By utilizing the color changes of these optically variable inks, even more complex color changes can be produced. For example, Patent Document 1 describes a method in which a plurality of first image lines containing an optical interference pigment are arranged regularly in the width direction, each of which has a substantially semicircular cross section perpendicular to the length direction, and a plurality of second image lines, each of which exhibits a different color from the first image lines under conditions of observation with specularly reflected light, are arranged on the first image lines so that a portion of the surface of the first image line is exposed. When the viewing direction of the printed matter obtained in this manner is changed in a plane perpendicular to the length direction of the first image lines, the ratio between the intensity of specularly reflected light from the first image lines and the intensity of specularly reflected light from the second image lines changes, resulting in a change in the color of the image displayed by those image lines. This image can then undergo further color changes due to the optical interference pigment. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5967651 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a display technology that enables special image display. [Means for solving the problem]

[0008] According to one aspect of the present invention, there is provided a display device comprising: a transparent material layer having a first main surface and a second main surface opposite to the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; and an image display layer provided on the second main surface, wherein the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color, wherein the first layer includes a plurality of first portions that are observable through at least some of the plurality of light-transmitting portions when observed from a first direction, and the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light-transmitting portions when observed from the first direction and are observable through at least some of the plurality of light-transmitting portions when observed from a second direction different from the first direction, wherein the arrangement of the plurality of first portions and the arrangement of the plurality of second portions have the same shape.

[0009] According to another aspect of the present invention, there is provided a display device according to the above aspect, wherein the portion of the mask layer where the plurality of light transmitting portions are provided is striped.

[0010] According to yet another aspect of the present invention, there is provided the display element according to any one of the above aspects, wherein the portion of the mask layer where the plurality of light transmitting portions are provided has a grid or checkerboard pattern.

[0011] According to yet another aspect of the present invention, there is provided a display device according to any of the above aspects, wherein the image display layer further includes a third layer that displays a third color different from the first color and the second color, the third layer including a plurality of third portions that are not observable through at least some of the plurality of light-transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light-transmitting portions when observed from a third direction different from the first direction and the second direction, and the arrangement of the plurality of third portions is such that the arrangement of the first portions and the arrangement of the plurality of second portions have the same shape.

[0012] According to yet another aspect of the present invention, there is provided a display device comprising: a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface, the mask layer having a plurality of light-transmitting portions, each of which is linear and arranged regularly in a width direction; and an image display layer provided on the second main surface, wherein the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color, the first layer including a plurality of first portions, each of which is linear and observable through at least a portion of the plurality of light-transmitting portions when observed from a first direction, the second layer including a plurality of second portions, each of which is linear, the plurality of second portions being unobservable through at least a portion of the plurality of light-transmitting portions when observed from the first direction, and being at least partially observable through at least a portion of the plurality of light-transmitting portions when observed from a second direction different from the first direction, and the plurality of first portions and the plurality of second portions being arranged alternately in the width direction.

[0013] According to yet another aspect of the present invention, there is provided a display according to the above aspect, in which the plurality of light transmitting portions are arranged in a nested manner.

[0014] According to yet another aspect of the present invention, there is provided a display device relating to any of the above aspects, wherein the image display layer further includes a third layer that displays a third color different from the first color and the second color, the third layer including a plurality of third portions that are each linear, the plurality of third portions being unobservable through at least some of the plurality of light-transmitting portions when observed from the first direction, and being at least partially observable through at least some of the plurality of light-transmitting portions when observed from a third direction different from the first direction and the second direction, and the plurality of first portions, the plurality of second portions, and the plurality of third portions being repeatedly arranged in this order in the width direction.

[0015] According to yet another aspect of the present invention, there is provided the display according to any one of the above aspects, wherein the plurality of first portions and the plurality of second portions are spaced apart from each other.

[0016] According to yet another aspect of the present invention, there is provided a display device according to any of the above aspects, in which, while the observation direction is being changed from the first direction to the second direction, a portion of each of the plurality of first portions and a portion of each of the plurality of second portions can be simultaneously observed through at least a portion of the plurality of light-transmitting portions.

[0017] According to yet another aspect of the present invention, there is provided a display device according to any of the above aspects, further comprising a back surface layer facing the second main surface with the image display layer sandwiched therebetween, wherein the maximum value Rpf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, the average value Raf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, the maximum value Rpb of reflectance measured within a wavelength range of 400 to 700 nm for the surface of the back surface layer opposite to the surface facing the second main surface, and the average value Rab of reflectance measured within a wavelength range of 400 to 700 nm for the surface of the back surface layer opposite to the surface facing the second main surface satisfy the relationships shown in the following formulas (1) to (3).

[0018] Raf≧20% …(1) Rab≧30% …(2) (Rpf-Raf)-(Rpb-Rab)≧10% …(3) According to yet another aspect of the present invention, there is provided the display according to any one of the above aspects, further comprising a reflective layer as a back surface layer facing the second main surface with the image display layer sandwiched therebetween.

[0019] According to yet another aspect of the present invention, there is provided a display device according to any of the above aspects, further comprising a reflective layer as a back surface layer facing the second main surface with the image display layer sandwiched therebetween, the back surface layer being made of ink containing a light-reflective or light-scattering pigment.

[0020] According to yet another aspect of the present invention, there is provided a display device according to any of the above aspects, wherein the transparent material layer has a thickness of 150 μm or less, the plurality of light-transmitting portions have a width of 100 μm or less and are arranged at a pitch of 200 μm or less, and the plurality of first portions have a width of 90 μm or less.

[0021] According to yet another aspect of the present invention, there is provided a display according to any one of the above aspects, wherein the thickness of the mask layer and the thickness of each of the layers included in the image display layer are 0.2 μm or more.

[0022] According to yet another aspect of the present invention, there is provided a label including a display according to any one of the above aspects and an adhesive layer facing the second main surface with the image display layer sandwiched therebetween.

[0023] According to yet another aspect of the present invention, there is provided an article with a display member, comprising the display member according to any one of the above aspects and an article supporting the display member.

[0024] According to yet another aspect of the present invention, the article has a support surface, and the display body is supported by the article such that the second main surface faces the support surface with the image display layer sandwiched therebetween, and the display body further includes a back surface layer facing the second main surface with the image display layer sandwiched therebetween, and the back surface layer is a reflective layer, or is made of ink containing a light-reflecting or light-scattering pigment, or is a layer having a maximum reflectance Rpf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the plurality of first portions, and a maximum reflectance Rpf of the plurality of first portions measured within a wavelength range of 400 to 700 nm through the light-transmitting portion. The average reflectance Raf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the first portions of the number, the maximum reflectance Rpb measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite the surface facing the second main surface, and the average reflectance Rab measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite the surface facing the second main surface, satisfy the relationships shown in the following formulas (1) to (3).

[0025] Raf≧20% …(1) Rab≧30% …(2) (Rpf-Raf)-(Rpb-Rab)≧10% …(3) According to yet another aspect of the present invention, the color difference ΔE between the mask layer and the support surface * ab There is provided an article with a display according to any one of the above aspects, wherein the number of the display members is 5 or less.

[0026] According to yet another aspect of the present invention, there is provided an article with a display according to any one of the above aspects, wherein the mask layer is black. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a top view of a display according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II of the display shown in FIG. [Figure 3] FIG. 3 is a diagram schematically showing how an observer views an image displayed by the display shown in FIGS. 1 and 2 under certain viewing conditions. [Figure 4] FIG. 4 is an enlarged view of the image displayed by the display device of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 5] FIG. 5 is a diagram schematically showing how an observer views an image displayed by the display unit shown in FIGS. 1 and 2 under another viewing condition. [Figure 6] FIG. 6 is an enlarged view of an image displayed by the display device of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 7] FIG. 7 is a diagram schematically showing how an observer views an image displayed by the display shown in FIGS. 1 and 2 under still another viewing condition. [Figure 8] FIG. 8 is an enlarged view of the image displayed by the display device of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 9] FIG. 9 is a diagram schematically showing a state in which a viewer is viewing an image displayed by the display device shown in FIGS. 1 and 2 under still another viewing condition. [Figure 10] FIG. 10 is an enlarged view of an image displayed by the display devices of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 11] FIG. 11 is a diagram schematically showing a state in which a viewer is viewing an image displayed by the display device shown in FIGS. 1 and 2 under still another viewing condition. [Figure 12] FIG. 12 is an enlarged view of the image displayed by the display devices of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 13] FIG. 13 is an enlarged view showing an image displayed by a display according to a second embodiment of the present invention under certain viewing conditions. [Figure 14] FIG. 14 is a diagram showing a structure obtained by omitting the mask layer from the display of FIG. [Figure 15] FIG. 15 is an enlarged view showing an image displayed by a display according to a third embodiment of the present invention under certain viewing conditions. [Figure 16] FIG. 16 is a diagram showing a structure obtained by omitting the mask layer from the display of FIG. [Figure 17] FIG. 17 is an enlarged view showing an image displayed by a display according to a fourth embodiment of the present invention under certain viewing conditions. [Figure 18] FIG. 18 is a diagram showing a structure obtained by omitting the mask layer from the display of FIG. [Figure 19] FIG. 19 is a cross-sectional view of a display according to a fifth embodiment of the present invention. [Figure 20] FIG. 20 is a cross-sectional view of a label according to a sixth embodiment of the present invention. [Figure 21] FIG. 21 is a cross-sectional view of an article with a display according to a seventh embodiment of the present invention. [Figure 22] FIG. 22 is a cross-sectional view showing the first step in the printing method used in the example. [Figure 23] FIG. 23 is a cross-sectional view showing the second step in the printing method used in the example. [Figure 24] FIG. 24 is a cross-sectional view showing the third step in the printing method used in the example. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are more specific embodiments of any of the above aspects. The following items can be incorporated into each of the above aspects, either singly or in combination.

[0029] Furthermore, the embodiments shown below are merely examples of configurations for embodying the technical idea of ​​the present invention, and the technical idea of ​​the present invention is not limited by the materials, shapes, structures, etc. of the components described below. Various modifications can be made to the technical idea of ​​the present invention within the technical scope defined by the claims.

[0030] In the drawings, elements having the same or similar functions are denoted by the same reference numerals, and redundant explanations will be omitted. Furthermore, the drawings are schematic, and the relationship between dimensions in one direction and dimensions in another direction, and the relationship between the dimensions of one member and the dimensions of another member, etc. may differ from the actual relationship.

[0031] First Embodiment Fig. 1 is a top view of a display according to a first embodiment of the present invention, Fig. 2 is a cross-sectional view of the display taken along line II-II of Fig. 1.

[0032] In each figure, the X direction is parallel to the first main surface of a transparent material layer (described later), i.e., parallel to the display surface of the display body. The Y direction is parallel to the first main surface and perpendicular to the X direction, i.e., parallel to the display surface and perpendicular to the X direction. The Z direction is perpendicular to the X and Y directions, i.e., the thickness direction of the display body.

[0033] A display 1A shown in FIGS. 1 and 2 includes a transparent material layer 2, a mask layer 3, and an image display layer.

[0034] The transparent material layer 2 is a layer made of a material that is transparent to light in the visible range, and is preferably colorless and transparent.

[0035] The transparent material layer 2 is a substrate that supports the mask layer 3 and the image display layer. The transparent material layer 2 can be a soft substrate such as a sheet or film, or a hard substrate such as a card. The transparent material layer 2 may have a single-layer structure or a multi-layer structure.

[0036] The transparent material layer 2 may be made of an inorganic material such as glass, or an organic material such as a polymer. Examples of organic materials such as polymers include photocurable resins such as polycarbonate resin, acrylic resin, fluorine-based acrylic resin, silicone-based acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene 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.

[0037] The thickness of the transparent material layer 2 is preferably 30 μm or more, and more preferably 50 μm or more. If the thickness of the transparent material layer 2 is reduced, the strength of the display 1A decreases. Furthermore, if the thickness of the transparent material layer 2 is reduced, the amount of change in the viewing direction required to cause a color change in the image displayed by the display 1A increases.

[0038] The thickness of the transparent material layer 2 is preferably 150 μm or less, and more preferably 100 μm or less. If the thickness of the transparent material layer 2 is large, even a slight change in the viewing direction may cause a color change in the image displayed by the display 1A.

[0039] 2, the transparent material layer 2 has a first main surface S1 and a second main surface S2 that is the rear surface of the first main surface S1. Here, the first main surface S1 and the second main surface S2 are planes parallel to each other.

[0040] The mask layer 3 is provided on the first main surface S1. The mask layer 3 is made up of a plurality of light-shielding portions 31, each extending in the Y direction and arranged in the X direction. The light-shielding portions 31 have the same width, are spaced apart from one another, and are arranged at a constant pitch in the X direction.

[0041] The mask layer 3 is light-shielding. That is, the light-shielding portions 31 of the mask layer 3 are opaque or translucent. The light-shielding portions 31 make it impossible or difficult to see the color of the portions of the image display layer that are concealed by them. The light-shielding portions 31 may be light-absorbing, light-scattering, or light-reflective with respect to light in the visible range.

[0042] The light-shielding portion 31 may be colored or colorless. Here, as an example, the light-shielding portion 31 is black. That is, the mask layer 3 is black.

[0043] The height of the light-shielding portion 31, i.e., the thickness of the mask layer 3, is, for example, in the range of 0.1 to 10 μm. Preferably, the thickness of the mask layer 3 is 0.2 μm or more. If the height of the light-shielding portion 31 is reduced, the hiding power of the mask layer 3 may be reduced. It is difficult to form a light-shielding portion 31 with a large height at a small width W.

[0044] The mask layer 3 has a plurality of regularly arranged light-transmitting portions 32. The light-transmitting portions 32 have a higher transmittance in the visible range than the light-shielding portions 31. Here, the mask layer 3 has gaps between the light-shielding portions 31 as linear light-transmitting portions 32. That is, the portions of the mask layer 3 where the light-transmitting portions 32 are provided are striped. The light-transmitting portions 32 each extend in the Y direction and are arranged in the X direction. The light-transmitting portions 32 have the same width and are arranged in the X direction at a constant pitch. The light-transmitting portions 32 may be transparent portions made of a transparent material that fill the gaps between the light-shielding portions 31. The transparent portions are preferably colorless and transparent.

[0045] Width W of the light transmitting portion 32 T The width W is preferably 20 μm or more, and more preferably 25 μm or more. T When is made smaller, the influence of the image display layer on the color of the image displayed by the display 1A is reduced.

[0046] Width W of the light transmitting portion 32 T The width W is preferably 100 μm or less, and more preferably 50 μm or less. T When the value is increased, the amount of change in the viewing direction required to cause a color change in the image displayed by the display 1A increases.

[0047] The pitch P of the arrangement of the light transmitting portions 32 T The pitch P is preferably 50 μm or more, and more preferably 80 μm or more. T When the width of the first portion 41G, the second portion 41B, and the third portion 41R is reduced, the widths of the first portion 41G, the second portion 41B, and the third portion 41R, which will be described later, also need to be reduced.

[0048] Pitch P T The pitch P is preferably 200 μm or less, and more preferably 100 μm or less. T When the width of the light-shielding portion 31 is large, the light-shielding portions 31 can be distinguished by visual observation, particularly when the width of the light-shielding portion 31 is large.

[0049] The image display layer is provided on the second main surface S2 and includes a first layer 4G, a second layer 4B, and a third layer 4R.

[0050] The first layer 4G displays a first color. Here, as an example, the first layer 4G displays green.

[0051] The first layer 4G includes a plurality of first portions 41G. When observed from a first direction, these first portions 41G are observable through at least a portion of the light transmitting portion 32. When observed from a second direction and a third direction different from the first direction, the first portions 41G are not observable through the at least a portion of the light transmitting portion 32.

[0052] Here, the first portions 41G each extend in the Y direction and are arranged in the X direction. The first portions 41G face the light-transmitting portions 32 with the transparent material layer 2 sandwiched therebetween. The first direction is the Z direction, the second direction is a direction perpendicular to the Y direction and tilted toward the positive side with respect to the Z direction, and the third direction is a direction perpendicular to the Y direction and tilted toward the negative side with respect to the Z direction.

[0053] The second layer 4B displays a second color different from the first color. Here, as an example, the second layer 4B displays blue.

[0054] The second layer 4B includes a plurality of second portions 41B. When observed from a first direction, the second portions 41B are not observable through at least the portion of the light transmitting portion 32, and when observed from a second direction, the second portions 41B are observable through at least the portion of the light transmitting portion 32. When observed from a third direction, the second portions 41B are not observable through at least the portion of the light transmitting portion 32.

[0055] Here, the second portions 41B each extend in the Y direction and are arranged in the X direction. The second portions 41B face the light-shielding portion 31 with the transparent material layer 2 sandwiched therebetween.

[0056] The third layer 4R displays a third color that is different from the first color and the second color. Here, as an example, the third layer 4R displays red.

[0057] The third layer 4R includes a plurality of third portions 41R. These third portions 41R are not observable through at least the portion of the light transmitting portion 32 when observed from the first direction and the second direction, but are observable through at least the portion of the light transmitting portion 32 when observed from the third direction.

[0058] Here, the third portions 41R each extend in the Y direction and are arranged in the X direction. The third portions 41R face the light-shielding portion 31 with the transparent material layer 2 sandwiched therebetween.

[0059] The first portion 41G, the second portion 41B, and the third portion 41R are repeatedly arranged in this order in the width direction. Specifically, the first portion 41G, the second portion 41B, and the third portion 41R form a structure in which repeating units, each consisting of one first portion 41G, one second portion 41B, and one third portion 41R, are arranged in the X direction. In each repeating unit, the second portion 41B, the first portion 41G, and the third portion 41R are arranged in this order in the X direction. The arrangement pitch of these repeating units is the pitch P of the arrangement of the light transmitting portions 32. T is equal to.

[0060] The array of first portions 41G, the array of second portions 41B, and the array of third portions 41R have the same shape and are positioned at the same location. Here, each of these arrays is rectangular.

[0061] The first portion 41G, the second portion 41B, and the third portion 41R are spaced apart from one another. This configuration makes it easier to see the color change as the viewing direction changes. In other words, the viewer is given a strong impression that the color has changed. This configuration also makes it easier for light to enter the second main surface S2 from the outside, allowing the display body 1A to display a brighter image. To achieve these effects, the distance between the first portion 41G and the adjacent second portion 41B, and the distance between the first portion 41G and the adjacent third portion 41R, are preferably 3 μm or more, and more preferably 5 μm or more.

[0062] However, increasing these distances increases the angle between the first direction and the second direction and the angle between the first direction and the third direction. That is, the amount of change in the viewing direction required to change the color of the image displayed by the display 1A from the first color to the second color or the third color increases. From this perspective, these distances are preferably 15 μm or less, and more preferably 10 μm or less.

[0063] The first portion 41G and the adjacent second portion 41B may be in contact with each other. Similarly, the first portion 41G and the adjacent third portion 41R may be in contact with each other. By adopting this configuration, the color changes continuously in response to changes in the viewing direction.

[0064] The width W1 of the first portion 41G is equal to the width W of the light transmitting portion 32. T It is preferable that the width W1 is smaller than the width W T , the second portion 41B and the third portion 41R will be spaced apart from the first portion 41G. Therefore, light can be more easily incident on the second main surface S2 from the outside, and the display 1A can display a brighter image. In this case, if the distance from the first portion 41G to the second portion 41B and the distance from the first portion 41G to the third portion 41R are sufficiently large, a slight change in the viewing direction from the first direction will not cause a change in the color of the image displayed by the display 1A. In order to obtain these effects, the width W T The difference between the width W1 and the width W2 is preferably 3 μm or more, and more preferably 5 μm or more.

[0065] The width W1 is preferably 90 μm or less, and more preferably 80 μm or less, and is preferably 50 μm or more, and more preferably 70 μm or more.

[0066] The thickness of each layer included in the image display layer is, for example, in the range of 0.1 to 10 μm, and preferably, the thickness of these layers is 0.2 μm or more.

[0067] The light-shielding portion 31, the first portion 41G, the second portion 41B, and the third portion 41R can be formed by, for example, printing, which can be performed using, for example, screen printing, screen offset printing, gravure printing, gravure offset printing, or flexographic printing.

[0068] For example, general-purpose color ink can be used for this printing. The ink used for this printing contains, for example, a resin and a pigment.

[0069] Examples of resins that can be used for the ink include general-purpose resins such as vinyl chloride resins, acrylic resins, polyurethane resins, polyester resins, epoxy resins, nitrocellulose resins, ethyl cellulose resins, polyamide resins, phenol resins, ketone resins, maleic acid resins, and photocurable resins.

[0070] Ink pigments include metals, oxides such as titanium dioxide, zinc oxide, and iron oxide, hydroxides, sulfides, selenides, cobalt aluminate, ferrocyanides, chromates, sulfates, carbonates, silicates, phosphates, and carbon. Organic pigments include carbon compounds, nitroso compounds, nitro compounds, azo compounds, lake pigments, phthalocyanine compounds, and condensed polycyclic materials.

[0071] Light-scattering particles may be used as the pigment of the ink. Examples of the material of the light-scattering particles include acrylic resin, polystyrene, styrene-acrylic copolymer or its crosslinked product, melamine-formaldehyde condensate, urethane resin, polyester, silicone resin, fluororesin, epoxy resin, and copolymers thereof. Inorganic materials may also be used for the light-scattering particles. Examples of inorganic materials that can be used for the light-scattering particles include clay compounds such as smectite, kaolinite, and talc; inorganic oxides such as silica, titania, alumina, silica-alumina, zirconia, zinc oxide, barium oxide, and strontium oxide; inorganic carbonates such as calcium carbonate, barium carbonate, magnesium carbonate, and strontium carbonate; inorganic chlorides such as barium chloride and strontium chloride; inorganic sulfates such as barium sulfate and strontium sulfate; inorganic nitrates such as barium nitrate and strontium nitrate; inorganic hydroxides such as barium hydroxide, aluminum hydroxide, and strontium hydroxide; and glass.

[0072] The ink may further contain a solvent, such as a hydrocarbon solvent such as petroleum naphtha, toluene, xylene, tetralin, or turpentine oil; an ester solvent such as n-butyl acetate or methoxybutyl acetate; a ketone solvent such as MIBK, diacetone alcohol, cyclohexanone, or isophorone; or a polyhydric alcohol derivative such as methyl cellosolve, ethyl cellosolve, butyl cellosolve, cellosolve acetate, butyl cellosolve acetate, or butyl carbitol; or a mixture thereof.

[0073] The ink may further comprise additives such as vegetable oils, surfactants, wax swells, defoamers, leveling agents, slip agents, UV absorbers, plasticizers, curing accelerators, or mixtures thereof.

[0074] The display 1A can further include one or more protective layers. For example, the display 1A can further include a protective layer provided on the first main surface S1 with the mask layer 3 sandwiched therebetween. Alternatively, the display 1A can further include a protective layer provided on the second main surface S2 with the image display layer sandwiched therebetween. Alternatively, the display 1A can further include both of these protective layers.

[0075] The protective layer is transparent to light in the visible range. The protective layer is preferably colorless and transparent. The protective layer may be a sheet or a film. For example, the protective layer may be a polymer sheet or a polymer film. The protective layer may have a single-layer structure or a multi-layer structure.

[0076] Examples of materials for the protective layer include photocurable resins such as polycarbonate resin, acrylic resin, fluorine-based acrylic resin, silicone-based acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin polymer, methylstyrene 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.

[0077] The color of the image displayed by this display 1A can change depending on the viewing direction, as explained below. Here, the surface of display 1A facing the image display layer is illuminated with white light, and the surface of display 1A facing the mask layer 3 is observed.

[0078] Fig. 3 is a diagram schematically illustrating a state in which an observer observes an image displayed by the display device shown in Fig. 1 and Fig. 2 under certain observation conditions. Fig. 4 is an enlarged diagram illustrating an image displayed by the display device shown in Fig. 1 and Fig. 2 under the observation conditions of Fig. 3.

[0079] 3, the observation direction D, in which the observer OB observes the display body 1A, is the first direction, i.e., the Z direction. Under these observation conditions, as shown in FIG. 4, the second portion 41B and the third portion 41R are hidden by the light-shielding portion 31, and only the first portion 41G is visible at the position of the light-transmitting portion 32. Therefore, the color of the image displayed by the display body 1A at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portion 31 and the color of the first portion 41G. In this case, the light-shielding portion 31 is black and the first portion 41G is green, so the color of the image is dark green.

[0080] Fig. 5 is a diagram schematically illustrating a state in which an observer observes an image displayed by the display device shown in Fig. 1 and Fig. 2 under another observation condition. Fig. 6 is an enlarged diagram illustrating an image displayed by the display device shown in Fig. 1 and Fig. 2 under the observation condition of Fig. 5.

[0081] Under the observation conditions shown in FIG. 5, the observation direction D is perpendicular to the Y direction and tilted toward the positive side with respect to the Z direction. The angle between the observation direction D and the Z direction is smaller than the angle between the second direction and the Z direction. Under these observation conditions, as shown in FIG. 6, the third portion 41R is hidden by the light-shielding portion 31, and each of the first portion 41G and the second portion 41B is partially hidden by the light-shielding portion 31, with the remaining portions visible through the light-transmitting portion 32. As such, while the observation direction D is changing from the first direction to the second direction, a portion of each of the first portion 41G and a portion of each of the second portion 41B can be simultaneously observed through at least a portion of the light-transmitting portion 32. Therefore, the color of the image displayed by the display unit 1A at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portion 31, the color of the first portion 41G, and the color of the second portion 41B. In this case, the light-shielding portion 31 is black, the first portion 41G is green, and the second portion 41B is blue, so the color of the image is dark cyan.

[0082] Fig. 7 is a diagram schematically illustrating a state in which a viewer views an image displayed by the display device shown in Fig. 1 and Fig. 2 under still another viewing condition. Fig. 8 is an enlarged view of an image displayed by the display device shown in Fig. 1 and Fig. 2 under the viewing condition of Fig. 7.

[0083] Under the viewing conditions shown in Fig. 7, the viewing direction D is the second direction. Under these viewing conditions, as shown in Fig. 7, the first portion 41G and the third portion 41R are hidden by the light-shielding portion 31, and only the second portion 41B is visible at the position of the light-transmitting portion 32. Therefore, the color of the image displayed by the display body 1A at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portion 31 and the color of the second portion 41B. In this case, the light-shielding portion 31 is black and the second portion 41B is blue, so the color of the image is dark blue.

[0084] Fig. 9 is a diagram schematically illustrating a state in which a viewer views an image displayed by the display device shown in Fig. 1 and Fig. 2 under still another viewing condition. Fig. 10 is an enlarged view illustrating an image displayed by the display device shown in Fig. 1 and Fig. 2 under the viewing condition of Fig. 9.

[0085] Under the observation conditions shown in FIG. 9 , the observation direction D is perpendicular to the Y direction and tilted negatively with respect to the Z direction. The angle between the observation direction D and the Z direction is smaller than the angle between the third direction and the Z direction. Under these observation conditions, as shown in FIG. 10 , the second portion 41B is hidden by the light-shielding portion 31, and each of the first portion 41G and the third portion 41R is partially hidden by the light-shielding portion 31, with the remaining portions visible through the light-transmitting portion 32. As such, while the observation direction D is changing from the first direction to the third direction, a portion of each of the first portion 41G and a portion of each of the third portion 41R can be simultaneously observed through at least a portion of the light-transmitting portion 32. Therefore, the color of the image displayed by the display unit 1A at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portion 31, the color of the first portion 41G, and the color of the third portion 41R. In this case, the light-shielding portion 31 is black, the first portion 41G is green, and the third portion 41R is blue, so the color of the image is dark yellow.

[0086] Fig. 11 is a diagram schematically illustrating a state in which a viewer views an image displayed by the display device shown in Fig. 1 and Fig. 2 under still another viewing condition. Fig. 12 is an enlarged view illustrating an image displayed by the display device shown in Fig. 1 and Fig. 2 under the viewing condition of Fig. 11.

[0087] 11, the observation direction D is the third direction. Under this observation condition, as shown in FIG. 12, the first portion 41G and the second portion 41B are hidden by the light-shielding portion 31, and only the third portion 41R is visible at the position of the light-transmitting portion 32. Therefore, the color of the image displayed by the display body 1A at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portion 31 and the color of the third portion 41R. In this case, the light-shielding portion 31 is black and the third portion 41R is red, so the color of the image is dark red.

[0088] As described above, the display 1A can change the color of the image in response to changes in the viewing direction, even if the mask layer 3 and the layers contained in the image display layer do not use optically variable ink. Therefore, there are no restrictions on the pigments that can be used, and it is possible to produce color changes that cannot be achieved with optically variable ink, for example. In this way, the technology described above for the display 1A makes it possible to display special images.

[0089] Second Embodiment Fig. 13 is an enlarged view showing an image displayed by a display according to a second embodiment of the present invention under certain viewing conditions, and Fig. 14 is a view showing a structure obtained by omitting the mask layer from the display shown in Fig. 13.

[0090] The display 1B shown in FIG. 13 is similar to the display 1A described above, except that the mask layer 3 and the image display layer have the following structures.

[0091] That is, in the display 1B, the portions of the mask layer 3 where the light-transmitting portions are provided (here, the light-shielding portions) are not striped but lattice-shaped. The light-transmitting portions of the mask layer 3 are square or rectangular.

[0092] In addition, in the display 1B, the image display layer has a structure shown in FIG. That is, the first portion 41G includes a plurality of first main patterns and a plurality of first sub-patterns. Each of the first main patterns has a shape in which first cross portions and first connecting portions are alternately connected in the X direction. The first cross portions face the light-transmitting portions of the mask layer 3 so that the positions of their intersections (hereinafter referred to as first intersections) coincide with the centers of the light-transmitting portions of the mask layer 3. Each of the first sub-patterns has a shape extending in the X direction and is made up of a plurality of first island-shaped portions arranged in the X direction. The first main patterns and first sub-patterns are alternately arranged in the Y direction so that each first island-shaped portion is located midway between adjacent first cross portions in the Y direction.

[0093] The second portion 41B includes a plurality of second main patterns and a plurality of second sub-patterns. Each of the second main patterns has a shape in which second cross portions and second connecting portions are alternately connected in the X direction. Each of the second sub-patterns has a shape extending in the X direction and is composed of a plurality of second island portions arranged in the X direction. The second main patterns and second sub-patterns are alternately arranged in the Y direction so that each second island portion is located midway between adjacent second cross portions in the Y direction. The positions of the second cross portions and second island portions are shifted by 1 / 3 of a period in both the X and Y directions relative to the positions of the first cross portions and first island portions, respectively.

[0094] The third portion 41R includes a plurality of third main patterns and a plurality of third sub-patterns. Each of the third main patterns has a shape in which third cross portions and third connecting portions are alternately connected in the X direction. Each of the third sub-patterns has a shape extending in the X direction and is composed of a plurality of third island portions arranged in the X direction. The third main patterns and the third sub-patterns are alternately arranged in the Y direction so that each third island portion is located midway between adjacent third cross portions in the Y direction. The positions of the third cross portions and the third island portions are shifted by 2 / 3 of a period in both the X and Y directions relative to the positions of the first cross portions and the first island portions, respectively.

[0095] In this display body 1B, the first direction is the Z direction, the second direction is perpendicular to the line segment connecting the centers of the adjacent first and second cross portions and is tilted toward the positive side with respect to the Z direction, and the third direction is perpendicular to the line segment connecting the centers of the adjacent first and third cross portions and is tilted toward the negative side with respect to the Z direction.

[0096] As described above, the image displayed by display unit 1A at the position where the array of light-shielding parts and the image display layer overlap changes color when the observation direction is changed in a plane perpendicular to the Y direction. However, the image displayed by display unit 1A does not change color even when the observation direction is changed in a plane perpendicular to the X direction.

[0097] In contrast, the image displayed by display 1B at the position where the light-shielding array and the image display layer overlap each other exhibits color changes regardless of the viewing direction. Thus, the technology described above for display 1B enables even more unique image displays.

[0098] <Third embodiment> Fig. 15 is an enlarged view showing an image displayed by a display according to a third embodiment of the present invention under certain viewing conditions, and Fig. 16 is a view showing a structure obtained by omitting the mask layer from the display shown in Fig. 15.

[0099] A display 1C shown in FIG. 15 is similar to the above-described display 1A except that the mask layer 3 and the image display layer have the following structures.

[0100] That is, in the display body 1C, the portions of the mask layer 3 where the light-transmitting portions are provided, i.e., the light-shielding portions 31 here, are checkered rather than striped. The light-transmitting portions of the mask layer 3 are square or rectangular.

[0101] In addition, in the display 1C, the image display layer has the structure shown in FIG. That is, the first portions 41G each have a shape extending in the Y direction, and are arranged in the X direction and in a direction tilted relative to the Y direction. The first portions 41G each face the light transmitting portion of the mask layer 3.

[0102] The second portions 41B each have a shape extending in the Y direction, and are arranged at the same pitch as the first portions 41G in the X direction and in the direction tilted relative to the Y direction. The second portions 41B each face the light-shielding portion 31 of the mask layer 3. The position of the second portions 41B in the Y direction coincides with the position of the first portions 41G in the Y direction, and the position of the second portions 41B in the X direction is shifted from the position of the first portions 41G in the X direction.

[0103] The third portions 41R each have a shape extending in the Y direction, and are arranged in the X direction and in the direction tilted relative to the Y direction at the same pitch as the first portions 41G. The third portions 41R each face the light-shielding portion 31 of the mask layer 3. The position of the third portion 41R in the Y direction coincides with the position of the first portion 41G in the Y direction, and the position of the third portion 41R in the X direction is shifted from the position of the first portion 41G in the X direction and the position of the second portion 41B in the X direction.

[0104] In this display body 1C, the first direction is the Z direction, the second direction is perpendicular to the Y direction and tilted toward the positive side of the Z direction, and the third direction is perpendicular to the Y direction and tilted toward the negative side of the Z direction.

[0105] The image displayed by display 1C at the position where the light-shielding array and the image display layer overlap changes color regardless of the viewing direction, just like the image displayed by display 1B. In this way, the technology described above for display 1C also enables more unique image displays.

[0106] <Fourth embodiment> Fig. 17 is an enlarged view showing an image displayed by a display according to a fourth embodiment of the present invention under certain viewing conditions, and Fig. 18 is a view showing a structure obtained by omitting the mask layer from the display shown in Fig. 17.

[0107] A display 1D shown in FIG. 17 is similar to the above-described display 1A except that the mask layer 3 and the image display layer have the following structures.

[0108] That is, in the display 1D, the light-transmitting portions of the mask layer 3 are each linear and are arranged regularly and nested in the width direction. More specifically, the portions of the mask layer 3 where the light-transmitting portions are provided, here the light-shielding portions 31, are not striped but concentric.

[0109] In addition, in the display 1D, the image display layer has a structure shown in FIG. That is, the first portions 41G are each linear and are arranged regularly and nested in the width direction. More specifically, the first portions 41G are concentric and face the light transmitting portions of the mask layer 3, respectively.

[0110] The second portions 41B are each linear and are arranged regularly and nested in the width direction. More specifically, the second portions 41B are concentric and face the light-shielding portions 31 of the mask layer 3. The center of the arrangement of the second portions 41B coincides with the center of the arrangement of the first portions 41G.

[0111] The third portions 41R are each linear and are arranged regularly and nested in the width direction. More specifically, the third portions 41R are concentric and face the light-shielding portions 31 of the mask layer 3. The center of the arrangement of the third portions 41R coincides with the center of the arrangement of the first portions 41G.

[0112] The first portion 41G, the second portion 41B, and the third portion 41R are arranged concentrically such that the second portion 41B is adjacent to the inside of each first portion 41G, and the third portion 41R is adjacent to the outside of each first portion 41G.

[0113] In this display body 1D, the first direction is the Z direction. The second direction is, for example, a direction that is perpendicular to the Y direction and tilted toward the positive side of the Z direction. And the third direction is, for example, a direction that is perpendicular to the Y direction and tilted toward the negative side of the Z direction.

[0114] When the display body 1D is observed from the first direction, the second portion 41B and the third portion 41R are hidden by the light-shielding portion 31, and only the first portion 41G is visible at the position of the light-transmitting portion. Therefore, the color of the image displayed by the display body 1D at the position where the array of the light-shielding portions 31 and the image display layer overlap is a mixture of the color of the light-shielding portions 31 and the color of the first portion 41G. In this case, the light-shielding portions 31 are black and the first portion 41G is green, so the color of the image is dark green.

[0115] When the display 1D is observed from the second direction, in the region located to the right of the center of the circle in the figure, the first portion 41G and the third portion 41R are hidden by the light-shielding portion 31, and only the second portion 41B is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display 1D in this region is a mixture of the color of the light-shielding portion 31 and the color of the second portion 41B. In this case, the light-shielding portion 31 is black and the second portion 41B is blue, so the color of the image is dark blue.

[0116] When the display body 1D is observed from the second direction, in the region located to the left of the center of the circle in the figure, the first portion 41G and the second portion 41B are hidden by the light-shielding portion 31, and only the third portion 41R is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display body 1D in this region is a mixture of the color of the light-shielding portion 31 and the color of the third portion 41R. In this case, the light-shielding portion 31 is black and the third portion 41R is red, so the color of the image is dark red.

[0117] When the display body 1D is observed from the second direction, in the regions located above or below the center of the circle in the figure, the second portion 41B and the third portion 41R are hidden by the light-shielding portion 31, and only the first portion 41G is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display body 1D in these regions is a mixture of the color of the light-shielding portion 31 and the color of the first portion 41G. In this case, the light-shielding portion 31 is black and the first portion 41G is blue, so the color of the image is dark green.

[0118] When the display 1D is observed from the third direction, in the region located to the left of the center of the circle in the figure, the first portion 41G and the third portion 41R are hidden by the light-shielding portion 31, and only the second portion 41B is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display 1D in this region is a mixture of the color of the light-shielding portion 31 and the color of the second portion 41B. In this case, the light-shielding portion 31 is black and the second portion 41B is blue, so the color of the image is dark blue.

[0119] When the display body 1D is observed from the third direction, in the region located to the right of the center of the circle in the figure, the first portion 41G and the second portion 41B are hidden by the light-shielding portion 31, and only the third portion 41R is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display body 1D in this region is a mixture of the color of the light-shielding portion 31 and the color of the third portion 41R. In this case, the light-shielding portion 31 is black and the third portion 41R is red, so the color of the image is dark red.

[0120] When the display 1D is observed from the third direction, in the regions located above or below the center of the circle in the figure, the second portion 41B and the third portion 41R are hidden by the light-shielding portion 31, and only the first portion 41G is visible through the light-transmitting portion. Therefore, the color of the image displayed by the display 1D in these regions is a mixture of the color of the light-shielding portion 31 and the color of the first portion 41G. In this case, the light-shielding portion 31 is black and the first portion 41G is blue, so the color of the image is dark green.

[0121] As described above, when the image displayed by the display unit 1D at the position where the light-shielding array and the image display layer overlap is viewed from the first direction, it has the same color throughout. In contrast, when the viewing direction is changed to the second or third direction, the image displayed by the display unit 1D includes areas of different colors. In this way, the technology described above for the display unit 1D also enables special image display.

[0122] <Fourth embodiment> FIG. 19 is a cross-sectional view of a display according to a fifth embodiment of the present invention.

[0123] A display 1E shown in FIG. 19 is similar to the display 1A described above, except that it further includes a back surface layer 5.

[0124] The back surface layer 5 faces the second main surface S2 with the image display layer sandwiched therebetween. Here, the back surface layer 5 is provided on the image display layer. Specifically, the back surface layer 5 includes a plurality of back surface portions 51 each extending in the Y direction and arranged in the X direction. These back surface portions 51 are provided on the first portion 41G, the second portion 41B, and the third portion 41R of the image display layer.

[0125] The back surface layer 5 is, for example, a reflective layer. The reflective layer is, for example, a metal material layer. The reflective layer can also be formed from ink containing a light-reflecting or light-scattering pigment. Such a reflective layer contains a light-reflecting or light-scattering pigment and a resin.

[0126] The ink for forming the back surface layer 5 can be the same as that described above for the ink for forming the light-shielding portion 31, the first portion 41G, the second portion 41B and the third portion 41R, except that the pigment is a light-reflecting or light-scattering pigment.

[0127] Light-reflecting or light-scattering pigments are typically made of inorganic materials. Examples of inorganic materials that can be used for light-reflecting pigments include metals or alloys such as aluminum, chromium, gold, silver, nickel, and copper. Examples of inorganic materials that can be used for light-scattering pigments include calcium carbonate, barium sulfate, aluminum hydroxide, zinc oxide, lithopone, and titanium oxide. Examples of inorganic materials that can be used for light-scattering pigments include clay compounds such as smectite, kaolinite, and talc; inorganic oxides such as silica, titania, alumina, silica-alumina, zirconia, zinc oxide, barium oxide, and strontium oxide; inorganic carbonates such as calcium carbonate, barium carbonate, magnesium carbonate, and strontium carbonate; inorganic chlorides such as barium chloride and strontium chloride; inorganic sulfates such as barium sulfate and strontium sulfate; inorganic nitrates such as barium nitrate and strontium nitrate; inorganic hydroxides such as barium hydroxide, aluminum hydroxide, and strontium hydroxide; and glass.

[0128] The display 1E preferably satisfies the relationships shown in the following formulas (1) to (3).

[0129] Raf≧20% …(1) Rab≧30% …(2) (Rpf-Raf)-(Rpb-Rab)≧10% …(3) Here, "Rpf" is the maximum reflectance value measured for the first portion 41G via the light transmitting portion 32 within a wavelength range of 400 to 700 nm. "Raf" is the average reflectance value measured for the first portion 41G via the light transmitting portion 32 within a wavelength range of 400 to 700 nm. "Rpb" is the maximum reflectance value measured for the surface of the back surface layer 5 opposite to the surface facing the second main surface S2 within a wavelength range of 400 to 700 nm. "Rab" is the average reflectance value measured for the surface of the back surface layer 5 opposite to the surface facing the second main surface S2 within a wavelength range of 400 to 700 nm.

[0130] These reflectances are measured using a microspectroscopic reflectance measuring device that can measure reflectance by irradiating a minute area with measuring light.

[0131] Specifically, when measuring the reflectance of the first portion 41G in the wavelength range of 400 to 700 nm through the light transmitting portion 32, the focus is set on the first portion 41G, and the diameter of the area irradiated with the measurement light is set smaller than the width of the first portion 41G. Measurements are performed at five arbitrary locations, and the measurement results with the highest and lowest average reflectances are excluded, and the remaining three measurement results are arithmetically averaged. From the results obtained by this arithmetic average, the maximum reflectance Rpf and average reflectance Raf for the first portion 41G are obtained.

[0132] Furthermore, when measuring the reflectance of the back surface layer 5 within the wavelength range of 400 to 700 nm, the focus is set on the back surface portion 51, and the diameter of the area irradiated with the measurement light is set smaller than the width of the back surface portion 51. Measurements are performed at five arbitrary locations, and the measurement results that yielded the highest and lowest average reflectances are excluded, and the remaining three measurement results are arithmetically averaged. From the results obtained by this arithmetic average, the maximum reflectance Rpb and average reflectance Rab for the back surface layer 5 are obtained.

[0133] A display 1E that satisfies the relationship of formula (1) exhibits high reflectance at the position of the first portion 41G when illuminated with white light from the front. In a display 1E that satisfies the relationship of formula (2), the back surface layer 5 exhibits high reflectance to white light compared to a surface with low reflectance, such as a black surface. In a display 1E that satisfies the relationship of formula (3), the saturation of the color exhibited at the position of the first portion 41G when illuminated with white light from the front is sufficiently greater than the saturation of the color exhibited at the position of the back surface layer 5 when illuminated with white light from the back.

[0134] As described above, the thickness of each layer included in the image display layer is, for example, 10 μm or less. When such a layer is irradiated with visible light in the wavelength range of 400 to 700 nm, the layer transmits a large amount of light while reflecting only a small amount of light.

[0135] Therefore, when the back surface of the display unit 1A is illuminated with white light and the transmitted light is observed, or when the back surface of the display unit 1A is placed on a white surface and the front surface of the display unit 1A is illuminated with white light and the reflected light is observed, the display unit 1A displays a bright image where the array of light-shielding portions 31 and the image display layer overlap. Bright images are easily visible. However, when the back surface of the display unit 1A is placed on a low-reflectivity surface, such as a black surface, and the front surface of the display unit 1A is illuminated with white light and the reflected light is observed, the image displayed by the display unit 1A is dark and therefore difficult to view.

[0136] Display 1E includes a back surface layer 5. When the front surface of display 1E is illuminated with white light, back surface layer 5 exhibits higher reflectivity for light transmitted through the layers included in the image display layer compared to a low-reflectivity surface such as a black surface. Therefore, even when display 1E is placed on a low-reflectivity surface, such as a black surface, so that its back surface is in contact with this surface, and the front surface of display 1E is illuminated with white light and the reflected light is observed, a bright image is displayed at the position where the array of light-shielding portions 31 and the image display layer overlap. In other words, display 1E can display easily visible images under a wider variety of conditions.

[0137] The back surface layer 5 can also be provided on the displays 1B to 1D. Similar to the display 1E, such a display can also display an image that is easily visible under a wider variety of conditions.

[0138] Sixth Embodiment FIG. 20 is a cross-sectional view of a label according to a sixth embodiment of the present invention.

[0139] The label 10E shown in FIG. 20 includes the display body 1E and an adhesive layer 11. The adhesive layer 11 is supported by the display body 1E. The adhesive layer 11 faces the second main surface S2 with the image display layer and the back surface layer 5 sandwiched therebetween. The adhesive layer 11 is made of, for example, a thermoplastic resin or a pressure-sensitive adhesive. The label 10E may further include a release sheet removably provided on the adhesive layer 11.

[0140] When the display body 1E is to be supported on another article, a label 10E including the display body 1E may be prepared and attached to the article. The label may be formed by supporting an adhesive layer 11 on any one of the display bodies 1A to 1D or on a display body 1A to 1D provided with a back surface layer 5.

[0141] Seventh Embodiment FIG. 21 is a cross-sectional view of an article with a display according to a seventh embodiment of the present invention. The article with a display 100 shown in FIG. 21 includes a label 10 and an article 110.

[0142] The label 10 includes a display body 1 and an adhesive layer 11. The display body 1 is any one of the display bodies 1A to 1D, or a display body 1E, which is provided with a back layer 5. The adhesive layer 11 is supported by the display body 1 so as to face the second main surface S2 with an image display layer sandwiched therebetween, or with the image display layer and the back layer 5 sandwiched therebetween. The display body 1 is attached to an article 110 via the adhesive layer 11. Here, as an example, the display body 1 is assumed to be the display body 1E.

[0143] The article 110 supports the display member 1. Here, as described above, the article 110 has a support surface, and supports the display member 1 at the position of this support surface via the adhesive layer 11. The article 110 may support the display member 1 by means other than an adhesive.

[0144] Color difference ΔE between the mask layer 3 and the support surface * ab is preferably small, for example, 5 or less. In this case, it becomes difficult to notice the presence of the mask layer 3, and it becomes difficult to notice that the display 1 is attached to the article 110. In this case, it becomes easy to notice the change in the image displayed by the display 1 according to the viewing direction at the position where the array of the light-shielding portions 31 and the image display layer overlap.

[0145] The colors of the mask layer 3 and the support surface are measured using a micro-area spectrocolorimeter, which is capable of measuring the color of a small measurement area by magnifying it with a microscope. Specifically, when measuring the color of the mask layer 3, the focus is set on an area of ​​the light-shielding portion 31 that has a diameter smaller than its width, and color measurement is performed on this area. This color measurement is performed on any three locations, and the obtained results are arithmetically averaged to obtain the color of the mask layer 3. The color of the support surface is also obtained using the same method as described above for the mask layer 3. From these results, the color difference ΔE * ab Calculate.

[0146] <Modification> The above-described display members, labels, and labeled articles can be modified in various ways.

[0147] For example, the image display layer may include four or more layers of different colors. Alternatively, the third layer 4R may be omitted. In this case, the second portion 41B of the second layer 4B may be further disposed at the position of the third portion 41R of the third layer 4R instead of the third portion 41R. [Example]

[0148] <Example 1> Figure 22 is a cross-sectional view showing a first step in the printing method used in the examples. Figure 23 is a cross-sectional view showing a second step in the printing method used in the examples. Figure 24 is a cross-sectional view showing a third step in the printing method used in the examples.

[0149] In this example, the display member 1A described with reference to Figures 1 and 2 was manufactured using the gravure offset printing apparatus shown in Figures 22 to 24. This gravure offset printing apparatus includes a printing plate 210 which is an intaglio plate, a blanket 250 for ink transfer, a doctor 220 which fills ink 230 into grooves 211 which are recesses in the printing plate 210, a blanket cylinder 240, the blanket 250 fixed to the surface of the blanket cylinder 240, and a printing platen 260.

[0150] The printing plate 210 used was a metal flat plate 100 mm wide and 100 mm long, with grooves 211 formed on one surface by etching. In the printing plate 210 for forming the mask layer 3 (hereinafter also referred to as the printing plate for forming the mask layer), the grooves 211 had a width of 60 μm and a pitch of 85 μm. In the printing plate 210 for forming the first layer 4G, the second layer 4B, and the third layer 4R (hereinafter also referred to as the printing plate for forming the image display layer), the grooves 211 had a width of 20 μm and a pitch of 85 μm.

[0151] The blanket cylinder 240 was made of SUS304, had a cylinder width of 220 mm, and a diameter of 300 mm.

[0152] The blanket 250 used was made mainly of silicone rubber, had a thickness of 0.9 mm, a hardness of 20°, a width of 200 mm, and a length of 250 mm.

[0153] The blanket cylinder 240 is rotatably supported by a movable carriage (not shown). The carriage is supported on a stand. A blanket 250 fixed to the surface of the blanket cylinder 240 receives an ink pattern 231, which is formed by filling ink 230 into grooves 211 with a doctor 220 as shown in FIG. 22 , from the printing plate 210 by the blanket cylinder 240 rolling while pressing the blanket 250 against the printing plate 210 as shown in FIG. 23 . Thereafter, as shown in FIG. 24 , the blanket cylinder 240 rolls while pressing the blanket 250 against the transparent material layer 2 placed on a printing platen 260, thereby transferring the ink pattern 231 from the blanket 250 to the transparent material layer 2.

[0154] In this example, the mask layer 3, the first layer 4G, the second layer 4B, and the third layer 4R were formed on the transparent material layer 2 using this gravure offset printing apparatus.

[0155] A polyethylene terephthalate base material having a width of 150 mm, a length of 150 mm and a thickness of 0.05 mm was used as the transparent material layer 2. First, a mask layer 3 was formed on one main surface of the transparent material layer 2.

[0156] Black offset printing ink was used as the ink for forming the mask layer 3. The printing plate 210 used was the printing plate for forming the mask layer described above.

[0157] In the first step of filling the grooves 211 of the printing plate 210 with black ink, the amount of ink 230 supplied to the printing plate 210 was 0.5 g / cm 2The position where the doctor 220 contacts the printing plate 210 is set as the zero point of the doctor 220, and the position of the doctor 220 is set at a position 0.5 mm closer to the printing plate 210 from the zero point, and the ink 230 is filled into the grooves 211 while being scraped off by the doctor 220.

[0158] In the second step of transferring the black ink from the printing plate 210 onto the blanket 250, the position where the blanket 250 contacts the printing plate 210 was set as the zero point of the blanket cylinder 240, and the position of the blanket cylinder 240 was set 0.5 mm closer to the zero point in the direction of the printing plate 210. From this position, the blanket cylinder 240 was rolled at 50 mm / sec, and the ink pattern 231 formed by filling the grooves 211 with blank ink was transferred from the printing plate 210 onto the blanket 250.

[0159] In the third step of transferring the ink pattern 231 made of black ink from the blanket 250 onto the transparent material layer 2, the position where the transparent material layer 2 contacts the blanket 250 is set as the zero point of the blanket cylinder 240, and the position of the blanket cylinder 240 is set 0.5 mm closer to the zero point in the direction of the transparent material layer 2. From this position, the blanket cylinder 240 is rolled at 100 mm / sec, and the ink pattern 231 made of black ink is transferred from the blanket 250 onto the transparent material layer 2.

[0160] Thereafter, the transparent material layer 2 was removed from the printing device and heated at approximately 100°C for 30 minutes to dry the ink pattern 231. In this way, a mask layer 3 including a light-shielding portion 31 made of the dried ink pattern 231 was obtained.

[0161] Next, a third layer 4R was formed on the surface of the transparent material layer 2 opposite to the surface on which the mask layer 3 was formed. A magenta offset printing ink was used as the ink for forming the third layer 4R. The printing plate 210 used was the printing plate for forming the image display layer described above. Except for these, the third layer 4R was formed in the same manner as described above for the mask layer 3. Each of the third portions 41R was formed so that its entirety faced each other with the light-shielding portion 31 and the transparent material layer 2 sandwiched therebetween, and so that the orthogonal projection of the third portion 41R onto a plane perpendicular to the Z direction was spaced 0.1 mm in the X direction from the outline of the orthogonal projection of the light-shielding portion 31 onto this plane.

[0162] Next, the second layer 4B was formed on the surface of the transparent material layer 2 on which the third layer 4R was formed. Cyan offset printing ink was used as the ink for forming the second layer 4B. The printing plate 210 used was the printing plate for forming the image display layer described above. Except for these factors, the second layer 4B was formed in the same manner as described above for the mask layer 3. Prior to supplying the cyan ink to the printing plate 210, any magenta ink remaining on the printing plate 210 was removed using a cleaning solution and a rag. Each of the second portions 41B was formed so that its entirety faced each other with the light-shielding portion 31 and the transparent material layer 2 sandwiched therebetween, and so that the orthogonal projection of the second portion 41B onto a plane perpendicular to the Z direction was spaced 0.1 mm in the X direction from the outline of the orthogonal projection of the light-shielding portion 31 onto this plane.

[0163] Thereafter, the first layer 4G was formed on the surface of the transparent material layer 2 on which the second layer 4B and the third layer 4R were formed. A green offset printing ink was used to form the first layer 4G. The printing plate 210 used was the same printing plate used to form the image display layer described above. Except for these factors, the first layer 4G was formed in the same manner as described above for the mask layer 3. Prior to supplying the green ink to the printing plate 210, any cyan ink remaining on the printing plate 210 was removed using a cleaning solution and a rag. Each first portion 41G was formed so that the position of its centerline in the X direction coincided with the position of the centerline of the light-transmitting portion 32 facing the first portion 41G in the Z direction.

[0164] In the display element 1A thus obtained, the light-shielding portions 31 of the mask layer 3 were 58 μm wide and 1.2 μm thick, and were arranged in the width direction at a pitch of 85 μm. The first portions 41G of the first layer 4G were 18 μm wide and 0.9 μm thick, and were arranged in the width direction at a pitch of 85 μm. The second portions 41B of the second layer 4B were 20 μm wide and 1.1 μm thick, and were arranged in the width direction at a pitch of 85 μm. The third portions 41R of the third layer 4R were 19 μm wide and 1.0 μm thick, and were arranged in the width direction at a pitch of 85 μm.

[0165] The reflectance of this display 1A was measured using an LVmicro-Z manufactured by Lambda Vision. The diameter of the measurement area was 15 μm. The results showed that the maximum reflectance Rpf was 25%, the average reflectance Raf was 8%, the maximum reflectance Rpb was 30%, and the average reflectance Rab was 10%. Substituting these values ​​into the left side of equation (3) yielded a value of −3%. In other words, this display 1A did not satisfy any of the relationships shown in equations (1) to (3). Because the display 1A does not include a back layer 5, the maximum reflectance Rpb and the average reflectance Rab are values ​​obtained for the surface of the first portion 41G opposite the surface facing the second main surface S2.

[0166] The surface of this display element 1A facing the mask layer 3 was illuminated with white light, and the surface facing the image display layer was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display element 1A was bright and easy to view.

[0167] This display 1A was attached to a black substrate with the image display layer facing the black substrate. The surface of the display 1A facing the mask layer 3 was illuminated with white light, and the display 1A was observed while changing the observation direction within a plane perpendicular to the Y direction. As a result, the image displayed by the display 1A was dark and difficult to see.

[0168] <Example 2> In this example, the display element 1E described with reference to Fig. 19 was manufactured. The mask layer 3, the image display layer, and the back surface layer 5 were formed using the same gravure offset printing apparatus as used in Example 1.

[0169] The transparent material layer 2 used was a polyethylene terephthalate base material similar to that used in Example 1. First, a mask layer 3 was formed on one main surface of the transparent material layer 2. The mask layer 3 was formed by the same method as that used in Example 1.

[0170] Next, a third layer 4R was formed on the surface of the transparent material layer 2 opposite to the surface on which the mask layer 3 was formed. The third layer 4R was formed by the same method as in Example 1.

[0171] Next, a portion of the back surface portion 51 included in the back surface layer 5 was formed on the third portion 41R included in the third layer 4R. White offset printing ink was used as the ink for forming these. The printing plate 210 used was the printing plate for forming the image display layer described above. Except for these, the portion of the back surface portion 51 covering the third portion 41R was formed using the same method as described above for the mask layer 3.

[0172] Next, the second layer 4B was formed on the surface of the transparent material layer 2 on which the third layer 4R and the like had been formed. The second layer 4B was formed by the same method as in Example 1.

[0173] Next, another part of the back surface portion 51 included in the back surface layer 5 was formed on the second portion 41B included in the second layer 4B. The same white ink as above was used as the ink for forming these. The printing plate 210 used was the printing plate for forming the image display layer described above. Except for these, the part of the back surface portion 51 covering the second portion 41B was formed by the same method as described above for the mask layer 3.

[0174] Next, the first layer 4G was formed on the surface of the transparent material layer 2 on which the second layer 4B and the third layer 4R etc. were formed. The first layer 4G was formed in the same manner as in Example 1.

[0175] Thereafter, the remainder of the back surface portion 51 included in the back surface layer 5 was formed on the first portion 41G included in the first layer 4G. The ink used to form these was the same white ink as above. The printing plate 210 used was the printing plate for forming the image display layer described above. Except for these, the portion of the back surface portion 51 covering the first portion 41G was formed in the same manner as described above for the mask layer 3. In this way, a back surface layer 5 consisting of the back surface portion 51 covering the first portion 41G, the second portion 41B, and the third portion 41R was obtained.

[0176] In the display element 1E thus obtained, the light-shielding portions 31 of the mask layer 3 had a width of 58 μm, a thickness of 1.1 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the first portion 41G of the first layer 4G and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the second portion 41B of the second layer 4B and the back surface portion 51 of the back surface layer 5 had a width of 24 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the third portion 41R of the third layer 4R and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm.

[0177] The reflectance of this display 1E was measured using an LVmicro-Z manufactured by Lambda Vision. Here, the diameter of the measurement area was 15 μm. As a result, the maximum reflectance Rpf was 60%, the average reflectance Raf was 30%, the maximum reflectance Rpb was 93%, and the average reflectance Rab was 91%. The value calculated by substituting these values ​​into the left side of equation (3) was 28%. In other words, this display 1E satisfied the relationships shown in equations (1) to (3).

[0178] The surface of this display 1E facing the mask layer 3 was illuminated with white light, and the surface facing the back layer 5 was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0179] Furthermore, this display 1E was attached to a black substrate with the back layer 5 facing the black substrate. The surface of the display 1E facing the mask layer 3 was illuminated with white light, and the display 1E was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0180] Next, the above-described color measurement was carried out on this display element 1E. For this color measurement, a color meter SC-50μ manufactured by Suga Test Instruments Co., Ltd. was used. Here, the diameter of the measurement range was set to 50μm. As a result, the color difference ΔE between the mask layer 3 and the support surface, which is the surface of the black substrate, was * ab The value was 0.9. When the display 1E and the black substrate to which it was attached were observed with the naked eye under white light illumination, they appeared to be a single unit.

[0181] <Example 3> In this example, the display member 1E described with reference to Fig. 19 was manufactured by the same method as in Example 2, except for the following: In this example, the first layer 4G was formed using cyan ink instead of green ink, the second layer 4B was formed using magenta ink instead of cyan ink, the third layer 4R was formed using green ink instead of magenta ink, and the back layer 5 was formed using silver ink containing silver nanoparticles and resin instead of white ink.

[0182] In the display element 1E thus obtained, the light-shielding portions 31 of the mask layer 3 had a width of 60 μm, a thickness of 1.0 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the first portion 41G of the first layer 4G and the back surface portion 51 of the back surface layer 5 had a width of 22 μm, a thickness of 2.0 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the second portion 41B of the second layer 4B and the back surface portion 51 of the back surface layer 5 had a width of 21 μm, a thickness of 2.1 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the third portion 41R of the third layer 4R and the back surface portion 51 of the back surface layer 5 had a width of 21 μm, a thickness of 2.0 μm, and were arranged in the width direction at a pitch of 85 μm.

[0183] The reflectance of this display 1E was measured using an LVmicro-Z manufactured by Lambda Vision. Here, the diameter of the measurement area was 15 μm. As a result, the maximum reflectance Rpf was 65%, the average reflectance Raf was 25%, the maximum reflectance Rpb was 45%, and the average reflectance Rab was 35%. The value calculated by substituting these values ​​into the left side of equation (3) was 30%. In other words, this display 1E satisfied the relationships shown in equations (1) to (3).

[0184] The surface of this display 1E facing the mask layer 3 was illuminated with white light, and the surface facing the back layer 5 was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0185] Furthermore, this display 1E was attached to a black substrate with the back layer 5 facing the black substrate. The surface of the display 1E facing the mask layer 3 was illuminated with white light, and the display 1E was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0186] Next, the above-described color measurement was carried out on this display element 1E. For this color measurement, a color meter SC-50μ manufactured by Suga Test Instruments Co., Ltd. was used. Here, the diameter of the measurement range was set to 50μm. As a result, the color difference ΔE between the mask layer 3 and the support surface, which is the surface of the black substrate, was * ab The value was 0.9. When the display 1E and the black substrate to which it was attached were observed with the naked eye under white light illumination, they appeared to be a single unit.

[0187] <Example 4> In this example, the display element 1E described with reference to Fig. 19 was manufactured by the same method as in Example 2, except for the following: In this example, the mask layer 3 was formed using silver ink containing silver nanoparticles and resin instead of black ink, the first layer 4G was formed using magenta ink instead of green ink, the second layer 4B was formed using green ink instead of cyan ink, and the third layer 4R was formed using cyan ink instead of magenta ink.

[0188] In the display element 1E thus obtained, the light-shielding portions 31 of the mask layer 3 had a width of 58 μm, a thickness of 1.2 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the first portion 41G of the first layer 4G and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the second portion 41B of the second layer 4B and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the third portion 41R of the third layer 4R and the back surface portion 51 of the back surface layer 5 had a width of 24 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm.

[0189] The reflectance of this display 1E was measured using an LVmicro-Z manufactured by Lambda Vision. Here, the diameter of the measurement area was 15 μm. As a result, the maximum reflectance Rpf was 70%, the average reflectance Raf was 35%, the maximum reflectance Rpb was 93%, and the average reflectance Rab was 91%. The value calculated by substituting these values ​​into the left side of equation (3) was 33%. In other words, this display 1E satisfied the relationships shown in equations (1) to (3).

[0190] The surface of this display 1E facing the mask layer 3 was illuminated with white light, and the surface facing the back layer 5 was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0191] Furthermore, this display 1E was attached to a silver metal color substrate so that the back layer 5 faced the silver metal color substrate. The surface of the display 1E facing the mask layer 3 was illuminated with white light, and the display 1E was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0192] Next, the above-mentioned color measurement was carried out on this display element 1E. For this color measurement, a color meter SC-50μ manufactured by Suga Test Instruments Co., Ltd. was used. Here, the diameter of the measurement range was set to 50μm. As a result, the color difference ΔE between the mask layer 3 and the support surface, which is the surface of the silver metal color substrate, was * ab The value was 4.5. When the display 1E and the silver metal color substrate to which it was attached were observed with the naked eye under white light illumination, they appeared to be a single unit.

[0193] <Example 5> In this example, the display 1E described with reference to FIG.

[0194] In the display element 1E thus obtained, the light-shielding portions 31 of the mask layer 3 had a width of 58 μm, a thickness of 1.2 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the first portion 41G of the first layer 4G and the back surface portion 51 of the back surface layer 5 had a width of 24 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the second portion 41B of the second layer 4B and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the third portion 41R of the third layer 4R and the back surface portion 51 of the back surface layer 5 had a width of 24 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm.

[0195] The reflectance of this display 1E was measured using an LVmicro-Z manufactured by Lambda Vision. Here, the diameter of the measurement area was 15 μm. As a result, the maximum reflectance Rpf was 70%, the average reflectance Raf was 35%, the maximum reflectance Rpb was 93%, and the average reflectance Rab was 91%. The value calculated by substituting these values ​​into the left side of equation (3) was 33%. In other words, this display 1E satisfied the relationships shown in equations (1) to (3).

[0196] The surface of this display 1E facing the mask layer 3 was illuminated with white light, and the surface facing the back layer 5 was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0197] Furthermore, this display 1E was attached to a substrate of a metal color different from the silver metal color, with the back layer 5 facing the metal-color substrate. The surface of the display 1E facing the mask layer 3 was illuminated with white light, and the display 1E was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0198] Next, the above-mentioned color measurement was carried out on this display element 1E. For this color measurement, a color meter SC-50μ manufactured by Suga Test Instruments Co., Ltd. was used. Here, the diameter of the measurement range was set to 50μm. As a result, the color difference ΔE between the mask layer 3 and the support surface, which is the surface of the metal-colored substrate, was * ab The value was 6.5. When the display body 1E and the metallic color substrate to which it was attached were observed with the naked eye under white light illumination conditions, there was a large difference in color between them, and it was easy to see that the display body 1E was attached to the metallic color substrate.

[0199] <Example 6> In this example, the display member 1E described with reference to Fig. 19 was produced in the same manner as in Example 2, except for the following: In this example, the back surface layer 5 was formed using black ink instead of white ink.

[0200] In the display element 1E thus obtained, the light-shielding portions 31 of the mask layer 3 had a width of 58 μm, a thickness of 1.2 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the first portion 41G of the first layer 4G and the back surface portion 51 of the back surface layer 5 had a width of 21 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the second portion 41B of the second layer 4B and the back surface portion 51 of the back surface layer 5 had a width of 23 μm, a thickness of 1.8 μm, and were arranged in the width direction at a pitch of 85 μm. The laminate of the third portion 41R of the third layer 4R and the back surface portion 51 of the back surface layer 5 had a width of 22 μm, a thickness of 1.7 μm, and were arranged in the width direction at a pitch of 85 μm.

[0201] The reflectance of this display 1E was measured using an LVmicro-Z manufactured by Lambda Vision. Here, the diameter of the measurement area was 15 μm. As a result, the maximum reflectance Rpf was 15%, the average reflectance Raf was 6%, the maximum reflectance Rpb was 4%, and the average reflectance Rab was 3%. The value calculated by substituting these values ​​into the left side of equation (3) was 8%. In other words, this display 1E did not satisfy any of the relationships shown in equations (1) to (3).

[0202] The surface of this display 1E facing the mask layer 3 was illuminated with white light, and the surface facing the back layer 5 was observed while changing the observation direction in a plane perpendicular to the Y direction. As a result, the color of the image changed significantly depending on the observation direction. Furthermore, the image displayed by the display 1E was bright and easy to view.

[0203] Furthermore, this display member 1E was attached to a black substrate with the back surface layer 5 facing the black substrate. The surface of the display member 1E facing the mask layer 3 was illuminated with white light, and the display member 1E was observed while changing the observation direction within a plane perpendicular to the Y direction. As a result, the image displayed by the display member 1E was dark and difficult to view.

[0204] Next, the above-described color measurement was carried out on this display element 1E. For this color measurement, a color meter SC-50μ manufactured by Suga Test Instruments Co., Ltd. was used. Here, the diameter of the measurement range was set to 50μm. As a result, the color difference ΔE between the mask layer 3 and the support surface, which is the surface of the black substrate, was * ab The value was 4.5. When the display 1E and the black substrate to which it was attached were observed with the naked eye under white light illumination, they appeared to be a single unit. [Explanation of symbols]

[0205] 1...display body, 1A...display body, 1B...display body, 1C...display body, 1D...display body, 1E...display body, 2...transparent material layer, 3...mask layer, 4B...second layer, 4G...first layer, 4R...third layer, 5...back layer, 10E...label , 11...adhesive layer, 31...light shielding part, 32...light transmitting part, 41B...second part, 41G...first part, 41R...third part, 51...rear surface part, 100...article with display body, 110...article, OB...observer, D...observation direction.

Claims

1. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; The display element has a lattice or checkerboard pattern in the portion of the mask layer where the plurality of light-transmitting portions are provided.

2. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; the image display layer further includes a third layer that displays a third color different from the first color and the second color; the third layer includes a plurality of third portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a third direction different from the first direction and the second direction, The array of the plurality of third portions is a display body having the same shape as the array of the first portions and the array of the plurality of second portions.

3. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; The display further includes a back surface layer facing the second principal surface with the image display layer sandwiched therebetween, wherein a maximum value Rpf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, an average value Raf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, a maximum value Rpb of reflectance measured for a surface of the back surface layer opposite to the surface facing the second principal surface within a wavelength range of 400 to 700 nm, and an average value Rab of reflectance measured for the surface of the back surface layer opposite to the surface facing the second principal surface satisfy the relationships shown in the following formulas (1) to (3). Raf≧20% ... (1) Rab≧30% ... (2) (Rpf-Raf)-(Rpb-Rab)≧10%...(3)

4. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface, the mask layer having a plurality of light-transmitting portions, each of which is linear and regularly arranged in a width direction; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions, each of which is linear and observable through at least some of the plurality of light transmitting portions when observed from a first direction; the second layer includes a plurality of linear second portions, the plurality of second portions being unobservable through the at least some of the plurality of light transmitting portions when observed from the first direction, and being at least partially observable through the at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction; the plurality of first portions and the plurality of second portions are arranged alternately in the width direction thereof, The display further includes a back surface layer facing the second principal surface with the image display layer sandwiched therebetween, wherein a maximum value Rpf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, an average value Raf of reflectance measured for the plurality of first portions through the light-transmitting portion within a wavelength range of 400 to 700 nm, a maximum value Rpb of reflectance measured for a surface of the back surface layer opposite to the surface facing the second principal surface within a wavelength range of 400 to 700 nm, and an average value Rab of reflectance measured for the surface of the back surface layer opposite to the surface facing the second principal surface satisfy the relationships shown in the following formulas (1) to (3). Raf≧20% ... (1) Rab≧30% ... (2) (Rpf-Raf)-(Rpb-Rab)≧10%...(3)

5. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; The display further comprises a reflective layer as a back surface layer facing the second main surface with the image display layer sandwiched therebetween.

6. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; The display further comprises a reflective layer as a back surface layer facing the second main surface with the image display layer sandwiched therebetween, the back surface layer being made of ink containing a light-reflecting or light-scattering pigment.

7. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; The transparent material layer has a thickness of 150 μm or less, the plurality of light-transmitting portions have a width of 100 μm or less and are arranged at a pitch of 200 μm or less, and the plurality of first portions have a width of 90 μm or less.

8. a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, the array of the plurality of first portions and the array of the plurality of second portions have the same shape; A display element in which the thickness of the mask layer and the thickness of each of the layers included in the image display layer are 0.2 μm or more.

9. A display according to any one of claims 1 to 8; an adhesive layer facing the second main surface with the image display layer sandwiched therebetween; Label with.

10. A display body and an article supporting the display body are provided, The display body is a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, an arrangement of the plurality of first portions and an arrangement of the plurality of second portions having the same shape, the article has a support surface, and the display body is supported by the article such that the second main surface faces the support surface with the image display layer interposed therebetween; the display body further includes a back surface layer facing the second main surface with the image display layer interposed therebetween, The backing layer is a reflective layer or is made of an ink containing a light-reflecting or light-scattering pigment, or The maximum reflectance Rpf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the plurality of first portions, the average reflectance Raf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the plurality of first portions, the maximum reflectance Rpb measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite to the surface facing the second main surface, and the average reflectance Rab measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite to the surface facing the second main surface, satisfy the relationships shown in the following formulas (1) to (3). Raf≧20% ... (1) Rab≧30% ... (2) (Rpf-Raf)-(Rpb-Rab)≧10%...(3)

11. A display body and an article supporting the display body are provided, The display body is a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface, the mask layer having a plurality of light-transmitting portions, each of which is linear and regularly arranged in a width direction; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions, each of which is linear and observable through at least some of the plurality of light transmitting portions when observed from a first direction; the second layer includes a plurality of linear second portions, the plurality of second portions being unobservable through the at least some of the plurality of light transmitting portions when observed from the first direction, and being at least partially observable through the at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction; the plurality of first portions and the plurality of second portions are arranged alternately in the width direction thereof, the article has a support surface, and the display body is supported by the article such that the second main surface faces the support surface with the image display layer interposed therebetween; the display body further includes a back surface layer facing the second main surface with the image display layer interposed therebetween, The backing layer is a reflective layer or is made of an ink containing a light-reflecting or light-scattering pigment, or The maximum reflectance Rpf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the plurality of first portions, the average reflectance Raf measured within a wavelength range of 400 to 700 nm through the light-transmitting portion for one or more of the plurality of first portions, the maximum reflectance Rpb measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite to the surface facing the second main surface, and the average reflectance Rab measured within a wavelength range of 400 to 700 nm for the surface of the back layer opposite to the surface facing the second main surface, satisfy the relationships shown in the following formulas (1) to (3). Raf≧20% ... (1) Rab≧30% ... (2) (Rpf-Raf)-(Rpb-Rab)≧10%...(3)

12. A display body and an article supporting the display body are provided, The display body is a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface and having a plurality of regularly arranged light-transmitting portions; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions that can be observed through at least some of the plurality of light-transmitting portions when observed from a first direction; the second layer includes a plurality of second portions that are not observable through at least some of the plurality of light transmitting portions when observed from the first direction, and are observable through at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction, an arrangement of the plurality of first portions and an arrangement of the plurality of second portions having the same shape, The article has a support surface, and the display body is supported by the article such that the second main surface faces the support surface with the image display layer sandwiched therebetween, and a color difference ΔE ＊ ａｂ An item with a display that is 5 or less.

13. A display body and an article supporting the display body are provided, The display body is a transparent material layer having a first main surface and a second main surface opposite the first main surface; a light-shielding mask layer provided on the first main surface, the mask layer having a plurality of light-transmitting portions, each of which is linear and regularly arranged in a width direction; an image display layer provided on the second principal surface; Equipped with the image display layer includes a first layer that displays a first color and a second layer that displays a second color different from the first color; the first layer includes a plurality of first portions, each of which is linear and observable through at least some of the plurality of light transmitting portions when observed from a first direction; the second layer includes a plurality of linear second portions, the plurality of second portions being unobservable through the at least some of the plurality of light transmitting portions when observed from the first direction, and being at least partially observable through the at least some of the plurality of light transmitting portions when observed from a second direction different from the first direction; the plurality of first portions and the plurality of second portions are arranged alternately in the width direction thereof, The article has a support surface, and the display body is supported by the article such that the second main surface faces the support surface with the image display layer sandwiched therebetween, and a color difference ΔE ＊ ａｂ An item with a display that is 5 or less.

14. The product with a display member according to any one of claims 10 to 13, wherein the mask layer is black.

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