Representation

Abstract

To provide a display capable of displaying a special image. [Solution] A display according to the present invention has an image display layer disposed on a printing substrate, and a plurality of partition layers disposed in a regular pattern on the image display layer. In the areas where the partition layers are not disposed, the image display layer includes a first portion that displays a first color and a second portion that displays a second color different from the first color. As the observation angle at which the image display layer is observed changes, the ratio of the first portion to the second portion that is obstructed by the partition layers changes, causing the observed color to change continuously.

Description

[Technical Field]

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

[0002] In recent years, advances in the performance of digital devices such as scanners, printers, and color copiers have made 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] Japanese Patent Application Laid-Open No. 2014-83721 Summary of the Invention [Problem to be solved by the invention]

[0007] An object of the present invention is to provide a display device capable of displaying special images. [Means for solving the problem]

[0008] A first aspect of the present invention is a display device in which an image display layer is disposed on a printing substrate, and a plurality of partition layers are regularly arranged on parts of the image display layer, and the image display layer includes, in parts where the partition layers are not disposed, a first portion that displays a first color and a second portion that displays a second color different from the first color, and the observed color changes continuously as the ratio of the first portion to the second portion that is obstructed by the partition layers changes as the observation angle at which the image display layer is observed changes.

[0009] A second aspect of the present invention is the display of the first aspect, wherein the first and second portions are in contact with a partition layer, the partition layer has a height in a thickness direction of the display and a width in a width direction perpendicular to the thickness direction, and the sum of the width of the first portion between adjacent partition layers in the width direction and the width of the second portion in the width direction is greater than the width of the partition layer.

[0010] A third aspect of the present invention is the display of the second aspect, wherein a value obtained by dividing the height of the partition layer by the width of the first portion in the width direction and a value obtained by dividing the height of the partition layer by the width of the second portion in the width direction are both within a range of 0.1 to 10.

[0011] A fourth aspect of the present invention is the display of the first aspect, in which the image display layer and the partition wall layer have a multi-layer structure.

[0012] A fifth aspect of the present invention is the display of the first aspect, wherein the partition wall layer is light-blocking.

[0013] A sixth aspect of the present invention is the display of the first aspect, wherein the partition wall layer is not light-shielding.

[0014] A seventh aspect of the present invention is the display of the first aspect, in which the first shape observed through the partition layer and the first portion is equal to the second shape observed through the partition layer and the second portion.

[0015] An eighth aspect of the present invention is the display of the first aspect, in which there are a plurality of pairs each consisting of an equal first shape and an equal second shape.

[0016] A ninth aspect of the present invention is the display of the first aspect, wherein the first portion and the second portion are arranged so that the same shape is repeated in the arrangement direction in which the partition wall layers are regularly arranged.

[0017] A tenth aspect of the present invention is the display of the ninth aspect, wherein the uniform shapes are arranged in any one of stripes, half-moons, lattices, concentric circles, and waves. [Effects of the Invention]

[0018] According to the present invention, it is possible to provide a display capable of displaying special images. [Brief explanation of the drawings]

[0019] [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 an example of a cross-sectional view taken along line II-II of the display shown in FIG. [Figure 2A] FIG. 2A is a partial cross-sectional view showing an example of the cross-sectional shape of the partition wall layer. [Figure 2B] FIG. 2B is another example of a cross-sectional view taken along line II-II of the display shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view that schematically shows a state in which an observer is observing an image displayed on the display device shown in FIGS. 1 and 2 under certain observation conditions. [Figure 4] FIG. 4 is an enlarged top view showing an image displayed by the display device of FIGS. 1 and 2 under the observation conditions of FIG. [Figure 5] FIG. 5 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under another viewing condition. [Figure 6] FIG. 6 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG. [Figure 7] FIG. 7 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition. [Figure 8] FIG. 8 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG. [Figure 9] FIG. 9 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition. [Figure 10] 10 is an enlarged top view showing an image displayed by the display units of FIGS. 1 and 2 under the viewing conditions of FIG. [Figure 11]FIG. 11 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition. [Figure 12] FIG. 12 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG. [Figure 13] FIG. 13 is an enlarged top view showing an image displayed by a display according to a second embodiment of the present invention. [Figure 14] FIG. 14 is an enlarged top view showing another image displayed by the display according to the second embodiment of the present invention. [Figure 15] FIG. 15 is a top view showing an enlarged image displayed by a display according to a third embodiment of the present invention under certain viewing conditions. [Figure 16] FIG. 16 is a top view showing a structure obtained by omitting the partition wall layer from the display of FIG. [Figure 17] FIG. 17 is a top view showing an enlarged image displayed by a display according to a fourth embodiment of the present invention under certain viewing conditions. [Figure 18] FIG. 18 is a top view showing a structure obtained by omitting the partition wall 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 another display according to the fifth embodiment of the present invention. [Figure 21] FIG. 21 is a cross-sectional view of labels according to the sixth and seventh embodiments of the present invention. [Figure 22] FIG. 22 is a cross-sectional view of a gravure offset printing apparatus showing the first step in the printing method used in the example. [Figure 23] FIG. 23 is a cross-sectional view of a gravure offset printing apparatus showing the second step in the printing method used in the example. [Figure 24] FIG. 24 is a cross-sectional view of a gravure offset printing apparatus and a transparent material layer showing the third step in the printing method used in the example. DETAILED DESCRIPTION OF THE INVENTION

[0020] 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 alone or in combination.

[0021] 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.

[0022] In the drawings referred to below, 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 ones.

[0023] First Embodiment FIG. 1 is a top view of a display according to a first embodiment of the present invention.

[0024] FIG. 2 is a cross-sectional view taken along line II-II of the display shown in FIG.

[0025] 1 and 2 includes a transparent material layer 2, a partition wall layer 3, and an image display layer 4. The image display layer 4 is made up of an image display layer first portion (hereinafter abbreviated as "first portion") 4B and an image display layer second portion (hereinafter abbreviated as "second portion") 4R.

[0026] The transparent material layer 2 is a printing substrate that supports the partition wall layer 3 and the image display layer 4. As shown in Fig. 2, the transparent material layer 2 has a first main surface S1 and a second main surface S2 that is the back surface of the first main surface S1. The first main surface S1 and the second main surface S2 are planes parallel to each other.

[0027] In this specification, in each drawing showing the display 1, the direction parallel to the first main surface S1 of the transparent material layer 2, i.e., the direction parallel to the display surface of the display 1, is defined as the X direction. The direction parallel to the first main surface S1 and perpendicular to the X direction, i.e., the direction parallel to the display surface and perpendicular to the X direction, is defined as the Y direction. Furthermore, the direction perpendicular to the X and Y directions, i.e., the thickness T direction of the display 1, is defined as the Z direction.

[0028] The transparent material layer 2 can be a flexible substrate such as a sheet or film, or a rigid substrate such as a card. The transparent material layer 2 may have a single-layer structure or a multi-layer structure.

[0029] The transparent material layer 2 is transparent to light in the visible range, and is preferably colorless and transparent. Specific materials for the transparent material layer 2 include inorganic materials such as glass, and organic materials such as polymers.

[0030] 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.

[0031] The thickness T of the transparent material layer 2 is preferably 15 μm or more, and more preferably 50 μm or more. If the thickness T of the transparent material layer 2 is reduced, the rigidity decreases, and handling properties such as transportability decrease.

[0032] The thickness T of the transparent material layer 2 is preferably 200 μm or less, more preferably 150 μm or less, and even more preferably 100 μm or less. If the thickness T of the transparent material layer 2 is large, flexibility decreases when it is attached to an adhesive or the like, making it difficult to apply to labels or the like.

[0033] On the first main surface S1, a plurality of first portions 4B, second portions 4R, and partition wall layers 3 are provided, regularly arranged in the X direction.

[0034] The barrier rib layers 3 extend in the Y direction, have equal widths in the X direction, and are spaced apart at a constant pitch P T are arranged in the following order.

[0035] The first portions 4B also extend in the Y direction, have equal widths in the X direction, and are spaced apart at a constant pitch P T are arranged in the following order.

[0036] The second portions 4R also extend in the Y direction, have equal widths in the X direction, and are spaced apart at a constant pitch P T are arranged in the following order.

[0037] Each partition layer 3 makes it impossible or inhibits the visibility of a part of the first portion 4B and the second portion 4R. According to one example, the partition layer 3 is light-blocking. According to another example, the partition layer 3 is opaque. The partition layer 3 may have any of light-absorbing, light-scattering, and light-reflective properties for visible light.

[0038] The partition layer 3 preferably has a visible light transmittance of 70% or less, and more preferably 50% or less. Here, the "visible light transmittance" refers to the average transmittance in the light wavelength range of 400 nm to 700 nm. The visible light transmittance is measured using, for example, an LVmicro-Z manufactured by Lambda Vision.

[0039] The partition layer 3 does not necessarily have to be light-blocking, but only needs to have the function of making the first portion 4B and part of the second portion 4R invisible or hindering the visibility.

[0040] The partition wall layer 3 may be colored. It may also have a multi-layer structure. The colored partition wall layer 3 may be formed by laminating an arbitrary color that does not have light-blocking properties and that is different from the first color displayed by the first portion 4B and the second color displayed by the second portion 4R on a light-blocking layer that is made up of, for example, a black layer, a white layer, and a metal layer.

[0041] The partition layer 3 and the image display layer 4 are layers disposed on the same first main surface S1, which makes it easy for the first color displayed by the first portion 4B and the second color displayed by the second portion 4R to be mixed together.

[0042] The barrier layer 3 may be black, for example.

[0043] In each partition layer 3, the value (H / WB1) obtained by dividing the height H to the highest point in the Z direction by the length WB1 of the first portion 4B in the X direction that is not in contact with the partition layer 3 is in the range of 0.1 to 10.

[0044] Similarly, in each partition layer 3, the value (H / WR1) obtained by dividing the height H to the highest point in the Z direction by the length WR1 of the second portion 4R in the X direction that is not in contact with the partition layer 3 is also within the range of 0.1 to 10.

[0045] Preferably, the height H of the partition layer 3 in the Z direction is 5 μm or more. If the height H of the partition layer 3 is reduced, when the display 1 is observed in the Z direction in FIG. 2, the change in area of ​​the first portion 4B and the second portion 4R, which are obstructed by the partition layer 3, is small, and color change is unlikely to occur.

[0046] The partition wall layers 3 are adjacent to each other and regularly arranged with first portions 4B and second portions 4R. The first portions 4B and second portions 4R can be seen in the gaps 32 between two adjacent partition wall layers 3.

[0047] The gap 32 includes a first portion 4B and a second portion 4R, and there may be an air gap 33 between the first portion 4B and the second portion 4R. This air gap 33 is preferably colorless and transparent.

[0048] The gaps 32 and the voids 33 are also strip-shaped and extend in the Y direction, and are regularly arranged in the X direction. T are equal to each other and have a constant pitch P T In other words, the gaps 32 are arranged in a stripe pattern.

[0049] The width W of the barrier layer 3 is preferably 100 μm or less, and more preferably 30 μm or less. T As the gap 32 in the display 1 becomes smaller and the visible range of the first portion 4B and the second portion 4R becomes narrower, the influence on the color of the image displayed by the display 1 becomes smaller.

[0050] Width W of gap 32 T The width W is preferably 50 μm or more, and more preferably 150 μm or more. T Increasing the width WB1 of the first portion 4B and the width WR1 of the second portion 4R increases the saturation of the image displayed by the display 1 and makes the color deeper, that is, increases the width WB1 of the first portion 4B and the width WR1 of the second portion 4R, but increases the height of the partition wall layer 3 to cause a color change in response to a change in the viewing direction.

[0051] Pitch P of the arrangement of the gaps 32 TThe pitch P is preferably 60 μm or more, and more preferably 160 μm or more. T When the width WB1 of the first portion 4B and the width WR1 of the second portion 4R are reduced, it is necessary to provide more partition wall layers 3, and therefore it is also necessary to reduce the width WB1 of the first portion 4B and the width WR1 of the second portion 4R.

[0052] Pitch P of the partition wall layer 3 T The pitch P is preferably 400 μm or less, and more preferably 200 μm or less. T When the value is increased, it becomes discernible by visual observation.

[0053] Pitch P of the partition wall layer 3 T The opening ratio of the portion where the gap 32 is provided is the pitch P T and the width W of the gap 32 T Using W T / P T It is expressed as:

[0054] The aperture ratio is preferably in the range of 40% to 90%, and more preferably in the range of 60% to 80%.

[0055] When the aperture ratio is increased, for example, the width WB1 of the first portion 4B and the width WR1 of the second portion 4R can be increased, and the saturation of the image displayed by the display 1 can be increased.

[0056] However, as described above, the height of the partition layer 3 is necessary for the color change that accompanies the change in the viewing direction.

[0057] The first portion 4B displays a first color, which may be blue, for example.

[0058] Each first portion 4B includes one or more first regions (not shown) that can be observed through one of the gaps 32 when observed from a normal direction perpendicular to the first main surface S1 (hereinafter, the Z direction, also referred to as the first direction), and one or more second regions (not shown) that cannot be observed through any of the gaps 32 when observed from the first direction.

[0059] These first and second regions each have a shape extending in the length direction of gap 32, that is, in the Y direction in the drawing, and are arranged in the width direction of gap 32, that is, in the X direction in the drawing.

[0060] The second portion 4R displays a second color different from the first color, for example, red.

[0061] Each second portion 4R also includes one or more first regions (not shown) that are each observable through one of the gaps 32 when viewed from the first direction, and one or more second regions (not shown) that are not observable through any of the gaps 32 when viewed from the first direction.

[0062] These first and second regions also each have a shape extending in the length direction of the gap 32, that is, in the Y direction in the drawing, and are arranged in the width direction of the gap 32, that is, in the X direction in the drawing.

[0063] The second region is present for the purpose of adjusting precision in the process, and may not be present.

[0064] The first portion 4B and the second portion 4R are arranged so that the position of the boundary region therebetween coincides with the position of the center line of the partition wall layer 3 and the position of the center line of the gap 32.

[0065] The array of the first portion 4B and the array of the second portion 4R have the same shape and are also positioned at the same location. Here, each of these arrays is rectangular.

[0066] The first portion 4B and the second portion 4R are spaced apart from each other. If the first portion 4B and the second portion 4R partially overlap at the gap 32 due to variations in the shapes or dimensions of the first portion 4B and the second portion 4R, the areas of the first portion 4B and the second portion 4R that can be viewed through the gap 32 will deviate from the design values. This deviation results in a degradation of image quality. By adopting a structure in which the first portion 4B and the second portion 4R are spaced apart from each other, it is possible to reduce the degradation of image quality caused by the above-described overlap.

[0067] Furthermore, by adopting this configuration, light can be more easily incident on the second main surface S2 from the outside, and a brighter image can be displayed on the display 1. To achieve these effects, the width of the gap 33 between the first portion 4B and the adjacent second portion 4R is preferably 3 μm or more, and more preferably 5 μm or more.

[0068] However, increasing these widths reduces the area of ​​the first portion 4B and the second portion 4R that can be viewed through the gap 32. As a result, the saturation of the image displayed by the display 1 decreases. From this perspective, these gaps 33 are preferably 15 μm or less, and more preferably 10 μm or less.

[0069] The first portion 4B and the adjacent second portion 4R may be in contact with each other. If the first portion 4B and the second portion 4R can be formed with high shape and dimensional accuracy, adopting this configuration can achieve the highest image quality.

[0070] The width W of the barrier rib layer 3 is the pitch P T Ratio of W / P T is preferably 50% or less, more preferably 30% or less. T As the thickness decreases, the height H of the barrier rib layer 3 needs to be increased.

[0071] W / P T If the proportion of the width WB1 of the first portion 4B and the width WR1 of the second portion 4R that can be seen from the gap 32 is high, the proportion of the partition layer 3 that can be seen from the first direction is high, and the proportion of the width WB1 of the first portion 4B and the width WR1 of the second portion 4R that can be seen from the gap 32 is reduced, resulting in a decrease in color saturation.

[0072] The width WB1 of the first portion 4B, the width WR1 of the second portion 4R, and the width W of the gap 32, which is the sum of the gap 33 between the first portion and the second portion, are T To clearly distinguish the color transition, the pitch P T It is preferable that the pitch is 50% or more of the pitch P T It is more preferable that the ratio is 70% or more.

[0073] The ratio of the height H of the highest point of the nearest barrier rib layer 3 to the width WB1 of the first portion 4B is determined to be within a certain range (e.g., H / WB1=0.1 to 10). The ratio of the height H of the highest point of the nearest barrier rib layer 3 to the width WR1 of the second portion 4R is also determined to be within a certain range (e.g., H / WR1=0.1 to 10).

[0074] 2, the tangent (tan) of the angle θ from the end EB to the height H of the highest point of the nearest partition wall layer 3 satisfies the relationship tanθ=H / WB1=0.1 to 10. Similarly, the tangent (tan) of the angle θ from the end ER to the height H of the highest point of the nearest partition wall layer 3 satisfies the relationship tanθ=H / WR1=0.1 to 10.

[0075] FIG. 2A is a partial cross-sectional view showing an example of the cross-sectional shape of the partition wall layer.

[0076] 2A(a) illustrates a partition wall layer 3 having a rectangular cross-sectional shape, similar to FIG. 2. However, the cross-sectional shape of the partition wall layer 3 may not necessarily be rectangular, and may have a cross-section with a curved, angled structure, as shown in FIGS. 2A(b) to 2A(d). In such cases, the highest point in the Z direction is defined as the highest point of the partition wall layer 3.

[0077] When the width WB1 and the width WR1 deviate from a certain ratio, the visibility is not restricted by the barrier layer 3, and therefore color switching does not occur.

[0078] Furthermore, even if the width WB1 and the width WR1 satisfy a certain ratio, if the width WB1 and the width WR1 are thin, such as 10 μm or less, a color change occurs, but the overall color of the display body 1 is pale, making it difficult to see the color change.

[0079] When the image display layer 4 includes multiple layers, the thickness of each layer is, for example, in the range of 0.1 to 10 μm. Preferably, the thickness of these layers is 0.2 μm or more. If the thickness of the image display layer 4 is 0.1 μm or less, it is difficult to recognize color changes, and if it exceeds 10 μm, light is difficult to transmit, and even if light is reflected from the gaps 33, the brightness decreases.

[0080] When the barrier layer 3 includes a plurality of layers, the thickness of each layer is, for example, in the range of 5 to 200 μm, and preferably, the thickness of each layer is 10 μm or more.

[0081] If the thickness of the barrier layer 3 is 5 μm or less, the width WB1 of the first portion 4B and the width WR1 of the second portion 4R for causing the color change become small, making it difficult to recognize the color change.

[0082] Furthermore, if the thickness of the partition layer 3 is 200 μm or more, the abrasion resistance decreases, and the ink tends to peel off from the substrate.

[0083] The thickness of the partition wall layer 3 in this embodiment is constant in height for each image unit that causes a color change.

[0084] If the height of the partition layer 3 is non-uniform within the plane, a color change occurs only in a part of the image, and therefore, when the viewing direction of the display 1 is tilted within a plane perpendicular to the Y direction, it is difficult to clearly see the color change.

[0085] Furthermore, in order to adjust the in-plane thickness to an uneven height in accordance with a set rule, multiple printing plates are required, which not only requires high alignment precision but is also unsuitable for use with plateless printing methods only.

[0086] The partition wall layer 3, the first portion 4B, and the second portion 4R can be formed by, for example, printing, such as screen printing, screen offset printing, gravure printing, gravure offset printing, or flexographic printing.

[0087] The partition wall layer 3, the first portion 4B, and the second portion 4R may be a single layer, or may be formed by printing and laminating the same ink multiple times at the same location, or by laminating different types of ink.

[0088] By laminating different types of ink, it is possible to impart a color other than the mixed color of the image display layer 4 when the viewing direction of the display 1 is tilted within a plane perpendicular to the Y direction.

[0089] Furthermore, when a different color is layered on a reflective white instead of a single black color, the partition wall layer 3 can prevent the hue of the display 1 from becoming dark.

[0090] Furthermore, the partition wall layer 3 does not need to be of a single color, and may be a laminate of layers of two or more colors, and may be the same color as the image display layer 4.

[0091] 2B is also a cross-sectional view taken along line II-II of the display shown in Fig. 1. However, Fig. 2B shows an example in which the configuration of the partition wall layer 3 is different from that of Fig. 2.

[0092] As shown in FIG. 2B , when the partition layer 3 has two or more colors and is the same color as the image display layer 4, the colors of the image display layer 4 are mixed as in the conventional case when the display 1 is viewed from a direction perpendicular to the Y direction. However, when the observation direction is tilted within a plane perpendicular to the Y direction, the color change can be more clearly seen than in the case of a partition layer 3 of a single color.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] Light-scattering particles may be used as the pigment of the ink. The material of the light-scattering particles may be, for example, acrylic resin, polystyrene, styrene-acrylic copolymer or its crosslinked product, melamine-formalin condensate, urethane resin, polyester, silicone resin, fluororesin, epoxy resin, or copolymers thereof. Inorganic materials may also be used as the light-scattering particles.

[0097] Inorganic materials that can be used for light-scattering particles include, for example, 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.

[0098] 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.

[0099] The ink may further include additives such as vegetable oils, surfactants, wax swells, defoamers, leveling agents, slip agents, UV absorbers, plasticizers, cure accelerators, or mixtures thereof.

[0100] The display 1 may further include one or more protective layers (not shown). For example, the display 1 may further include a protective layer provided on the first main surface S1 with the partition layer 3 sandwiched therebetween. Alternatively, the display 1 may further include a protective layer provided on the second main surface S2. Alternatively, the display 1 may further include both of these protective layers.

[0101] The protective layer is transparent to light in the visible range, and is preferably colorless and transparent.

[0102] The protective layer may be a coating liquid, 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.

[0103] 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.

[0104] As will be explained below, the color of the image displayed by the display 1 changes depending on the viewing direction. Note that the surface of the display 1 facing the partition wall layer 3 is assumed to be observed here.

[0105] FIG. 3 is a cross-sectional view that schematically shows a state in which an observer is observing an image displayed on the display device shown in FIGS. 1 and 2 under certain observation conditions.

[0106] FIG. 4 is an enlarged top view showing an image displayed by the display device of FIGS. 1 and 2 under the observation conditions of FIG.

[0107] 3, the viewing direction D in which the viewer OB views the display 1 is the first direction, i.e., the Z direction. Under this viewing condition, the first portion 4B and the second portion 4R are visible without being hidden by the partition wall layer 3, as shown in FIG.

[0108] Therefore, what is observed is a mixture of the color of the partition wall layer 3, the color of the first portion 4B, and the color of the second portion 4R. In this example, the partition wall layer 3 is black, the first portion 4B is blue, and the second portion 4R is red, so that a dark purple image is observed.

[0109] FIG. 5 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under another viewing condition.

[0110] FIG. 6 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG.

[0111] 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. Under these observation conditions, as shown in Fig. 6, the area of ​​the first portion 4B that is hidden by the partition layer 3 is smaller, and the area of ​​the second portion 4R that is hidden by the partition layer 3 is larger, compared to the observation conditions described with reference to Figs. 3 and 4.

[0112] 3 and 4, under these viewing conditions, the first portions 4B have a greater effect, and the second portions 4R have a smaller effect, on the color of the image displayed by the display unit 1 at the position where the arrangement of the partition layer 3 overlaps with the image display layer 4. Here, the partition layer 3 is black, the first portions 4B are blue, and the second portions 4R are red, so that a dark purple image with a strong bluish tinge and a weak reddish tinge is observed.

[0113] FIG. 7 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition.

[0114] FIG. 8 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG.

[0115] Under the observation conditions shown in FIG. 7, the observation direction D is the second direction. The second direction is perpendicular to the Y direction and tilted toward the positive side with respect to the Z direction. The angle that the observation direction D or the second direction forms with the Z direction is larger than the angle that the observation direction D forms with the Z direction under the observation conditions described with reference to FIG. 5. Under these observation conditions, as shown in FIG. 8, the second portion 4R is hidden by the partition layer 3, and only the first portion 4B is visible.

[0116] Therefore, the color of the image displayed by the display unit 1 at the position where the arrangement of the partition layers 3 and the image display layer 4 overlap is a mixture of the color of the partition layers 3 and the color of the first portions 4B. Here, the partition layers 3 are black and the first portions 4B are blue, so a dark blue image is observed. Furthermore, when the display unit 1 is perpendicular to the Y direction and tilted toward the positive side with respect to the Z direction, the gaps 33 become visible, causing a color change. Therefore, the observation point shown in Figure 7 from a point perpendicular to the Y direction is the angle range in which the color change can be recognized.

[0117] FIG. 9 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition.

[0118] 10 is an enlarged top view showing an image displayed by the display units of FIGS. 1 and 2 under the viewing conditions of FIG.

[0119] 9, the observation direction D is perpendicular to the Y direction and tilted toward the negative side with respect to the Z direction. Under these observation conditions, the area of ​​the first portion 4B that is hidden by the partition layer 3 is larger, and the area of ​​the second portion 4R that is hidden by the partition layer 3 is smaller.

[0120] 3 and 4, under these viewing conditions, the first portions 4B have only a small effect, but the second portions 4R have a larger effect, on the color of the image displayed by the display unit 1 at the position where the arrangement of the partition layer 3 and the image display layer 4 overlap. Here, the partition layer 3 is black, the first portions 4B are blue, and the second portions 4R are red, so that a dark purple image with a weak blue tinge and a strong red tinge is observed.

[0121] FIG. 11 is a cross-sectional view that schematically shows a state in which a viewer is viewing an image displayed by the display unit shown in FIGS. 1 and 2 under still another viewing condition.

[0122] FIG. 12 is an enlarged top view showing an image displayed by the display unit of FIGS. 1 and 2 under the observation conditions of FIG.

[0123] Under the observation conditions shown in FIG. 11, the observation direction D is the third direction. The third direction is perpendicular to the Y direction and tilted toward the negative side with respect to the Z direction. The angle that the observation direction D or the third direction forms with the Z direction is larger than the angle that the observation direction D forms with the Z direction under the observation conditions described with reference to FIG. 9. Under these observation conditions, as shown in FIG. 12, the first portion 4B is hidden by the partition layer 3, and only the second portion 4R is visible.

[0124] Therefore, the color of the image displayed by the display unit 1 at the position where the arrangement of the partition layers 3 and the image display layer 4 overlap is a mixture of the color of the partition layers 3 and the color of the second portions 4R. Here, the partition layers 3 are black and the second portions 4R are red, so a dark red image is observed. Furthermore, when the display unit 1 is perpendicular to the Y direction and tilted toward the positive side with respect to the Z direction, the gaps 33 become visible, causing a color change. Therefore, the observation point shown in Figure 11 from a point perpendicular to the Y direction is the angle range in which the color change can be recognized.

[0125] The angle range in which the color change can be recognized is within ±80° when the vertical point to the Y direction is set at 0°, but is preferably within ±50°, and more preferably within ±45°.

[0126] When the angle range is wide, the color change is gradual, so depending on your sensitivity, you may get the impression that no color change is occurring.

[0127] Furthermore, depending on sensitivity, the shorter the time for which the observation angle is changed, the easier it is to notice the color change, so it is desirable for the angle to be within ±45°.

[0128] As described above, the display 1 can change the color of the image in response to changes in the viewing direction even if the partition wall layer 3 and the image display layer 4 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 1 makes it possible to display special images.

[0129] Furthermore, when the observer OB tries to check the color change of the image displayed by the display 1, the observation direction D is usually first set to a substantially normal direction, and then the observation direction D is tilted.

[0130] Since the first portion 4B, the second portion 4R, and the partition wall layer 3 are always visible, the color of the image changes simply by changing the observation direction D from a state in which it is approximately normal to a state in which it is slightly tilted. In such a display 1, the color change of the displayed image in response to the change in the observation direction D is continuous.

[0131] Second Embodiment 13 and 14 are enlarged top views showing an image displayed by a display according to a second embodiment of the present invention.

[0132] The display 1A that displays the image shown in FIG. 13 is similar to the display 1 described in the first embodiment, except that the partition layer 3 and the image display layer 4 (first portion 4B and second portion 4R) have the following structure.

[0133] The display 1B that displays the image shown in FIG. 14 has a configuration in which the partition wall layer 3 is omitted from the display 1A shown in FIG.

[0134] In the displays 1A and 1B, the partition layer 3 is not striped but dot-shaped, and has a structure in which the ratio of the first portion 4B to the second portion 4R varies depending on the viewing direction D.

[0135] The first portion 4B and the second portion 4R each have a shape extending in the Y direction, and no color change occurs even when the observation direction is changed in the X direction perpendicular to the Y direction.

[0136] Third Embodiment FIG. 15 is a top view showing an enlarged image displayed by a display according to a third embodiment of the present invention under certain viewing conditions.

[0137] FIG. 16 is a top view showing a structure obtained by omitting the partition wall layer from the display of FIG.

[0138] The display 1C shown in FIG. 15 is similar to the display 1 described above, except that the partition layer 3 and the image display layer 4 (first portion 4B and second portion 4R) have the following structure.

[0139] In the display 1C, the barrier rib layer 3 has a checkered pattern instead of a striped pattern.

[0140] In addition, in the display 1C, the image display layer 4 has a structure shown in the top view of FIG.

[0141] In the image display layer 4, the first portions 4B and the second portions 4R are each square or rectangular and are arranged alternately in the X and Y directions. The arrangement pitches of the first portions 4B in the X and Y directions are the same as the arrangement pitches of the partition wall layer 3 in the X and Y directions, respectively. A boundary region extending in the X direction and a boundary region extending in the Y direction are interposed between the first portions 4B and the second portions 4R.

[0142] The image displayed by display 1 changes color when the viewing direction is tilted within a plane perpendicular to the Y direction. In contrast, the image displayed by display 1C changes color when the viewing direction is tilted within a plane perpendicular to the Z direction and a direction that obliquely intersects with the Y direction, for example, within a plane perpendicular to directions that form angles of 90° with the Z direction and 45° with the Y direction, respectively.

[0143] Furthermore, display 1 displays images of different colors when the observation direction is tilted to the plus side within a plane perpendicular to the Y direction and when the observation direction is tilted to the plus or minus side within this plane. In contrast, display 1C displays images of the same color when the observation direction is tilted to the plus side within a plane perpendicular to the Z direction and a direction obliquely intersecting the Y direction and when the observation direction is tilted to the plus or minus side within this plane.

[0144] Display 1C displays images of different colors when the observation direction is tilted within a plane perpendicular to the Z direction and the Y direction at angles of 90° and 45°, respectively, and when the observation direction is tilted within a plane perpendicular to this plane and parallel to the Z direction.

[0145] In this way, the technology described above for display 1C enables even more unique image display. Furthermore, similar to display 1, the color of the image displayed by display 1C changes simply by tilting the viewing direction D slightly from the normal direction. Furthermore, the color of this image changes continuously as the viewing direction D changes.

[0146] <Fourth embodiment> FIG. 17 is a top view showing an enlarged image displayed by a display according to a fourth embodiment of the present invention under certain viewing conditions.

[0147] FIG. 18 is a top view showing a structure obtained by omitting the partition wall layer from the display of FIG.

[0148] A display 1D shown in FIG. 17 is similar to the display 1 described above, except that the partition layer 3 and the image display layer 4 (first portion 4B and second portion 4R) have the following structure.

[0149] That is, in the display 1D, the partition layers 3 are each strip-shaped and are arranged regularly and nested in the width direction. More specifically, the portions of the partition layers 3 where the gaps 32 are provided are not striped but concentric.

[0150] In addition, in the display 1D, the image display layer 4 has a structure shown in FIG.

[0151] That is, the first portions 4B are each strip-shaped and are arranged regularly and nested in the width direction. More specifically, the first portions 4B are concentric. The region along the outer periphery of each first portion 4B faces the partition wall layer 3, while the region along the inner periphery of each first portion 4B faces the partition wall layer 3.

[0152] The second portions 4R are each strip-shaped and are arranged regularly and nested in the width direction. More specifically, the second portions 4R are concentric. Each second portion 4R has an inner circumferential region facing the partition wall layer 3, and an outer circumferential region facing the partition wall layer 3.

[0153] The center of the arrangement of the second portions 4R coincides with the center of the arrangement of the first portions 4B. The first portions 4B and the second portions 4R are arranged concentrically. The first portions 4B and the second portions 4R are arranged alternately from the center of the circle outward. The first portions 4B and the second portions 4R are spaced apart from each other.

[0154] When the display 1D is observed from the first direction, which is the normal direction, each of the first portion 4B and the second portion 4R is partially hidden by the partition layer 3. Therefore, the color of the image displayed by the display 1D at the position where the arrangement of the partition layer 3 and the image display layer 4 overlap is a mixture of the color of the partition layer 3, the color of the first portion 4B, and the color of the second portion 4R. In this case, the partition layer 3 is black, the first portion 4B is blue, and the second portion 4R is red, so a dark purple image is observed.

[0155] When the display 1D is tilted from the observation direction to the first direction, for example, when the observation direction is tilted to the positive side in a plane perpendicular to the Y direction, for example, when the observation direction is set to a second direction tilted to the right in the figure with respect to the normal direction, in the region located to the right of the center of the circle in the figure, the first portion 4B is hidden by the partition layer 3, and only the second portion 4R is visible. Therefore, the color of the image displayed by the display 1D in this region is a mixture of the color of the partition layer 3 and the color of the second portion 4R. In this case, since the partition layer 3 is black and the second portion 4R is red, a dark red image is observed.

[0156] When the display unit 1D is observed from the second direction, in the region located to the left of the center of the circle in the figure, the second portion 4R is hidden by the partition layer 3, and only the first portion 4B is visible. Therefore, the color of the image displayed by the display unit 1D in this region is a mixture of the color of the partition layer 3 and the color of the first portion 4B. In this case, the partition layer 3 is black and the first portion 4B is blue, so a dark blue image is observed.

[0157] When the display 1D is viewed from the second direction, the color of the image displayed by the display 1D in the area above or below the center of the circle in the figure is the same as the color of the image displayed by the display 1D when viewed from the first direction. That is, the color of the image is dark purple.

[0158] As described above, when the image displayed by the display unit 1D at the position where the arrangement of the partition layer 3 and the image display layer 4 overlap is viewed from the first direction, it has the same color throughout. In contrast, when the viewing direction is changed to the second 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.

[0159] Furthermore, similar to the display 1, the color of the image displayed by the display 1D changes simply by tilting the viewing direction D slightly from the normal direction. The color of this image changes continuously in response to changes in the viewing direction D.

[0160] Fifth Embodiment FIG. 19 is a cross-sectional view of a display according to a fifth embodiment of the present invention.

[0161] FIG. 20 is a cross-sectional view of another display according to the fifth embodiment of the present invention.

[0162] A display 1E shown in FIGS. 19 and 20 is similar to the display 1 described above, except that the partition layer 3, the first portion 4B, and the second portion 4R are multiple layers.

[0163] The partition layer 3, the first portion 4B, and the second portion 4R each extend in the Y direction and include a reflective layer 5. The reflective layer 5 is, for example, a metal material layer. The reflective layer 5 can also be formed from an ink containing a light-reflecting or light-scattering pigment. The ink and pigment for such a reflective layer 5 can be the same as those described above, and include a light-reflecting or light-scattering pigment and a resin.

[0164] Light-reflecting or light-scattering pigments are, for example, made of inorganic substances. Examples of inorganic substances that can be used for light-reflecting pigments include metals or alloys such as aluminum, chromium, gold, silver, nickel, and copper. Examples of inorganic substances that can be used for light-scattering pigments include calcium carbonate, barium sulfate, aluminum hydroxide, zinc oxide, lithopone, and titanium oxide.

[0165] Inorganic substances 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.

[0166] The display 1E preferably satisfies the relationships shown in the following formulas (1) to (5).

[0167] Raf1≧20% …(1) Raf2≧20% …(2) (Rpf1-Raf1)-(Rpb-Rab)≧10% …(3) (Rpf2-Raf2)-(Rpb-Rab)≧10% …(4) Here, "Rpf1" is the maximum value of reflectance measured for the first portion 4B through the gap 32 in the wavelength range of 400 to 700 nm. "Raf1" is the average value of reflectance measured for the first portion 4B through the gap 32 in the wavelength range of 400 to 700 nm. "Rpf2" is the maximum value of reflectance measured for the second portion 4R through the gap 32 in the wavelength range of 400 to 700 nm. "Raf2" is the average value of reflectance measured for the second portion 4R through the gap 32 in the wavelength range of 400 to 700 nm.

[0168] "Rpb" is the maximum reflectance measured within the wavelength range of 400 to 700 nm. "Rab" is the average reflectance measured within the wavelength range of 400 to 700 nm.

[0169] These reflectances are measured using a microspectroscopic reflectance measuring device that can measure reflectance by irradiating a minute area with measuring light.

[0170] Specifically, when measuring the reflectance of the first portion 4B through the gap 32 within the wavelength range of 400 to 700 nm, the focus is set on the first portion 4B within the first region, and the diameter of the area irradiated with the measurement light is set smaller than the width of the entire first portion 4B within the first region. 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 Rpf1 and average reflectance Raf1 for the first portion 4B are obtained.

[0171] When measuring the reflectance of the second portion 4R through the gap 32 within the wavelength range of 400 to 700 nm, the focus is set on the second portion 4R within the first region, and the diameter of the area irradiated with the measurement light is set smaller than the entire width of the second portion 4R within the first region. 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 Rpf2 and average reflectance Raf2 for the second portion 4R are obtained.

[0172] The display 1E, which satisfies the relationships of formulas (1) and (2), exhibits high reflectance at the positions of the first regions of the first portion 4B and the second portion 4R when illuminated with white light from the front.

[0173] In the display 1E that satisfies the relationship between equations (3) and (4), the saturation of the color exhibited at the position of the first region of the first portion 4B and the second portion 4R when illuminated with white light from the front is sufficiently greater than the saturation of the color exhibited at the position of the back layer when illuminated with white light from the back.

[0174] When the image display layer 4 includes multiple layers, the thickness of each layer is, as described above, 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.

[0175] Therefore, when the back surface of the display unit 1 is illuminated with white light and the transmitted light is observed, or when the display unit 1 is placed on a white surface so that its back surface is in contact with this surface and the front surface of the display unit 1 is illuminated with white light and the reflected light is observed, the image display layer 4 in the gap 32 that is not shielded by the partition layer 3 displays a bright image. Bright images are easily visible. However, when the display unit 1 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 the display unit 1 is illuminated with white light and the reflected light is observed, the image displayed by the display unit 1 is dark and therefore difficult to view.

[0176] Display 1E includes a reflective layer as part of its multiple layers. When the front surface of display 1E is illuminated with white light, the reflective layer exhibits higher reflectance for light transmitted through layers included in image display layer 4 than a surface with low reflectance such as black.

[0177] Therefore, even when the display unit 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 the display unit 1E is illuminated with white light and the reflected light is observed, a bright image is displayed in the gaps 32 that are not shielded by the partition layer 3. In other words, the display unit 1E can display an easily visible image under a wider variety of conditions.

[0178] The reflective layer 5 can also be provided in the partition layer 3. Like the display 1E, such a display can display an image that is easily visible under a wider variety of conditions, and it is also possible to change the color of the partition layer 3 by sandwiching the reflective layer 5 therebetween.

[0179] Sixth Embodiment FIG. 21 is a cross-sectional view of a label according to a sixth embodiment of the present invention.

[0180] The article with a display 100 shown in FIG. 21 includes a label 10 and an article 110.

[0181] The label 10 shown in FIG. 21 includes the above-described 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. The adhesive layer 11 is made of, for example, a thermoplastic resin or a pressure-sensitive adhesive. The label 10 may further include a release sheet removably provided on the adhesive layer 11.

[0182] When the display body 1E is to be supported on another article, a label 10 including the display body 1E may be prepared and attached to the article. Note that the label 10 may be formed by supporting the adhesive layer 11 on any of the display bodies described in the first to fifth embodiments, or on any of the display bodies provided with a backing layer (not shown), instead of the display body 1E.

[0183] Seventh Embodiment Referring again to FIG. 21, an article with a display member according to a seventh embodiment of the present invention will be described.

[0184] As mentioned above, instead of the display body 1E, the label 0 may be made of any of the display bodies described in the first to fifth embodiments, or a display body having a backing layer (not shown) attached thereto, with the adhesive layer 11 supported thereon.

[0185] The adhesive layer 11 is supported by the display body 1E so as to face the second main surface S2 with the image display layer 4 sandwiched therebetween, or with the image display layer 4 and the back surface layer sandwiched therebetween. The display body 1E is attached to the article 110 via the adhesive layer 11.

[0186] The article 110 supports the display member 1. Here, as described above, the article 110 has a support surface (not shown), and supports the display member 1E at the position of this support surface via the adhesive layer 11. The article 110 may support the display member 1E by means other than an adhesive.

[0187] It is preferable that the color difference ΔE*ab between the partition layer 3 and the support surface is small, for example, not more than 5. In this case, the presence of the partition layer 3 becomes difficult to perceive, and it becomes difficult to perceive that the display unit 1E is attached to the article 110. In this case, it becomes easy to perceive changes in the image displayed by the display unit 1E at the position where the arrangement of the partition layer 3 and the image display layer 4 overlap, depending on the viewing direction.

[0188] The colors of the partition wall layer 3 and the support surface are measured using a micro-area spectrophotometer that can measure the color of a small measurement area by magnifying it with a microscope. Specifically, when measuring the color of the partition wall layer 3, the focus is set on an area having a diameter smaller than the width of the partition wall layer 3, and color measurement is performed on this area. This color measurement is performed on three arbitrary locations, and the obtained results are arithmetically averaged to obtain the color of the partition wall layer 3. The color of the support surface is also obtained using the same method as described above for the partition wall layer 3. The color difference ΔE*ab is then calculated from these results.

[0189] In the above embodiment, the shapes formed by the partition layer disposed on the display body are shown as stripes, checkerboards, and concentric circles, but the shapes formed by the partition layer disposed on the display body are not limited to these and may also be, for example, crescent, lattice, or wave shapes. [Example]

[0190] <Example 1> FIG. 22 is a cross-sectional view of a gravure offset printing apparatus showing the first step in the printing method used in the example.

[0191] FIG. 23 is a cross-sectional view of a gravure offset printing apparatus showing the second step in the printing method used in the example.

[0192] FIG. 24 is a cross-sectional view of a gravure offset printing apparatus and a transparent material layer showing the third step in the printing method used in the example.

[0193] In this example, the display member 1 shown in FIGS. 1 and 2 was manufactured by carrying out the first to third steps shown in FIGS. 22 to 24 using a gravure offset printing device.

[0194] This gravure offset printing apparatus includes an intaglio printing plate 210, a doctor 220 that fills ink 230 into grooves 211 that are recesses in the printing plate 210, a blanket cylinder 240, a blanket 250 for ink transfer fixed to its surface, and a printing platen 260.

[0195] The printing plate 210 used was a metal flat plate with grooves 211 formed on one surface by etching. In the printing plate 210 for forming the partition layer 3 (hereinafter also referred to as the "printing plate for forming the partition layer"), the width of the grooves 211 was 15 μm and the pitch of the grooves 211 was 40 μm. In the printing plate 210 for forming the first portion 4B and the second portion 4R (hereinafter also referred to as the "printing plate for forming the image display layer"), the width of the grooves 211 was 17 μm and the pitch was 40 μm.

[0196] 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.

[0197] In this example, the partition wall layer 3, the first portion 4B and the second portion 4R were formed on the transparent material layer 2 using this gravure offset printing apparatus.

[0198] A polyethylene terephthalate base material having a thickness of 0.05 mm was used as the transparent material layer 2. First, on one main surface of the transparent material layer 2, the first portion 4B and the second portion 4R were formed adjacent to each other.

[0199] Cyan gravure offset printing ink and magenta gravure offset printing ink were used as the inks to form the first part 4B and the second part 4R, and the inks filled in the printing plate 210 were transferred to the substrate via a blanket.

[0200] In this case, since each printed line was 18 μm thick, the alignment position was adjusted so that the magenta and cyan printed lines overlapped by 0.5 μm under the partition wall layer 3. In addition, only sample B was subjected to laminate printing in the same location to increase the layer thickness. The gap 33 between the first portion 4B and the second portion 4R was 5 μm.

[0201] Using a similar method, black ink for forming the partition wall layer 3 was transferred onto the first portion 4B and the second portion 4R so that the first portion 4B and the second portion 4R covered the same width to form a printed line. At this time, lamination printing was performed at the same location so that the height of the partition wall layer 3 was 10 μm (Sample A), 20 μm (Sample B), and 5 μm (Sample C).

[0202] In the display 1 thus obtained, the partition layers 3 had a width of 10 μm and were arranged at a pitch of 30 μm in the width direction.

[0203] The first portions 4B had a width WB protruding from the barrier layer 3 of 10 μm, a thickness of 1.2 μm (samples A and C) and 2.3 μm (sample B), and were arranged at the same pitch as the barrier layer 3 in the width direction.

[0204] The second portions 4R had a width WR protruding from the barrier layer 3 of 10 μm, a thickness of 1.1 μm (samples A and C) and 2.2 μm (sample B), and were arranged at the same pitch as the barrier layer 3 in the width direction.

[0205] The first main surface S1 of the partition layer 3 of this display 1 was illuminated with white light on the surface facing the image display layer 4, and the observation direction was changed in a plane perpendicular to the Y direction. As a result, for sample A, the image color changed significantly from purple at an angle of 0° straight on to deep blue-purple (cyan) to deep red-purple (magenta) as the observation direction changed from +45° to -45° (total 90°). However, the color change was faint.

[0206] With sample B, the image color changed significantly from a purple color at 0° straight ahead to a deep blue-purple color (cyan) or a deep red-purple color (magenta) within a viewing angle range of +27° to -27° (total 54°). The color changed suddenly because the angle range was narrow and the transition colors were deep.

[0207] For sample C, the image color changed from a purple color at 0° straight ahead to a deep blue-purple color (cyan) or a deep red-purple color (magenta) as the viewing angle changed from +64° to -64° (a total of 128°). However, because the colors were light and the change was gradual, it was difficult to visually discern the change.

[0208] Samples A, B, and C were produced within the scope of the claims and the description, but the range of color change differs depending on the height of the barrier rib layer 3, and they must be selected depending on the angle at which the product will be used.

[0209] Furthermore, since the visible width from the gap 32 between the first portion 4B and the second portion 4R is narrow, the color becomes easier to see as the number of times the first portion 4B and the second portion 4R are stacked increases.

[0210] <Example 2> In this example, the partition wall layer 3 and the image display layer 4 were produced using the same gravure offset printing apparatus as that used in Example 1.

[0211] The transparent material layer 2 used was a polyethylene terephthalate substrate similar to that used in Example 1. As in Example 1, an image display layer 4 was formed on the transparent material layer 2, and a partition wall layer 3 was formed thereon.

[0212] The printing plates 210 for forming the partition wall layer 3 are sample D, in which the width of the grooves 211 is 10 μm and the pitch of the grooves 211 is 400 μm, and sample E, in which the width of the grooves 211 is 100 μm and the pitch of the grooves 211 is 400 μm.

[0213] In addition, for the printing plate 210 for forming the first portion 4B and the second portion 4R, the width of the groove 211 was 190 μm and the pitch was 400 μm for sample D, and the width of the groove 211 was 195 μm and the pitch was 400 μm for sample E.

[0214] Cyan gravure offset printing ink and magenta gravure offset printing ink were used as the inks to form the first part 4B and the second part 4R, and the inks filled in the printing plate 210 were transferred to the substrate via a blanket.

[0215] In this case, the printed lines were 185 μm in the case of sample D and 190 μm in the case of sample E, so the height of the magenta and cyan partition wall layers 3 was set to 5 μm and the alignment position was adjusted to form the printed lines. The gap 33 between the first portion 4B and the second portion 4R was 20 μm in the case of sample D and 10 μm in the case of sample E.

[0216] In a similar manner, black ink for forming the partition wall layer 3 was transferred onto the first portion 4B and the second portion 4R so that the first portion 4B and the second portion 4R covered the same width to form a printed line. In this case, for both Samples D and E, lamination printing was performed at the same location so that the height of the partition wall layer 33 was 200 μm.

[0217] In the display 1 thus obtained, the partition layers 3 of sample D were 10 μm wide and 200 μm high, and were arranged at a pitch of 400 μm in the width direction. On the other hand, the partition layers 3 of sample E were 100 μm wide and 200 μm high, and were arranged at a pitch of 400 μm in the width direction.

[0218] The first portions 4B of sample D had a width WB1 protruding from the partition wall layer 3 of 185 μm and a height of 1.1 μm, and were arranged in the width direction at the same pitch as the partition wall layers 3. The first portions 4B of sample E had a width WB1 protruding from the partition wall layer 3 of 145 μm and a height of 1.1 μm, and were arranged in the width direction at the same pitch as the partition wall layers 3.

[0219] The second portions 4R of sample D had a width WR1 protruding from the partition wall layer 3 of 185 μm and a height of 1.2 μm, and were arranged in the width direction at the same pitch as the partition wall layers 3. The second portions 4R of sample E had a width WR1 protruding from the partition wall layer 3 of 145 μm and a height of 1.2 μm, and were arranged in the width direction at the same pitch as the partition wall layers 3.

[0220] The first main surface S1 of the partition layer 3 of this display 1 was illuminated with white light on the surface facing the image display layer 4, and the observation direction was changed in a plane perpendicular to the Y direction. As a result, for sample D, the image color changed significantly from purple at 0° straight ahead to deep blue-purple (cyan) to deep red-purple (magenta) as the observation direction changed within the range of +43° to -43° (86° in total).

[0221] On the other hand, with sample E, the image color changed from a purple color at 0° straight ahead to a deep blue-purple color (cyan) or a deep red-purple color (magenta) as the viewing angle changed within the range of +36° to -36° (total 72°).

[0222] Samples D and E were produced within the scope of the claims and the description. The color change angle was narrow, and the color changed dramatically in a short period of time, making it easy for users to recognize the color change. However, compared to Sample D, Sample E had lower saturation and was paler in color.

[0223] Although the best mode for carrying out the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such a configuration. Those skilled in the art may conceive of various modifications and alterations within the scope of the technical ideas of the invention as defined in the claims, and it is understood that such modifications and alterations also fall within the technical scope of the present invention. [Explanation of symbols]

[0224] 1, 1A, 1B, 1C, 1D, 1E...Display body 2…Transparent material layer 3…Partition layer 4...Image display layer 4B...Image display layer first part 4R…Image display layer second part 5...Reflection layer 10...Label 11...Adhesive layer 32...Gap 33...Void 100...Items with displays 110...Goods OB...observer D...Observation direction

Claims

1. an image display layer is disposed on a printing substrate, and a plurality of partition wall layers are regularly disposed on part of the image display layer; the image display layer includes, in a portion where the partition wall layer is not disposed, a first portion that displays a first color and a second portion that displays a second color different from the first color; and the observed color changes continuously as a ratio of the first portion to the second portion that is obstructed by the partition wall layer changes with a change in an observation angle at which the image display layer is observed; the first portion and the second portion are in contact with the partition layer, the partition layer has a height in a thickness direction of the display body and a width in a width direction perpendicular to the thickness direction, and a total width of the width of the first portion in the width direction between adjacent partition layers and the width of the second portion in the width direction is greater than a width of the partition layer.

2. 2. The display according to claim 1, wherein a value obtained by dividing the height of the partition layer by the width of the first portion in the width direction and a value obtained by dividing the height of the partition layer by the width of the second portion in the width direction are both within a range of 0.1 to 10.

3. 2. The display according to claim 1, wherein the image display layer and the partition wall layer have a multi-layer structure.

4. The display according to claim 1 , wherein the partition wall layer has a light-shielding property.

5. The display according to claim 1 , wherein the partition wall layer does not have a light-shielding property.

6. The display according to claim 1 , wherein a first shape observed through the partition layer and the first portion is equal to a second shape observed through the partition layer and the second portion.

7. The display according to claim 6 , wherein there are a plurality of pairs of the same first shape and second shape.

8. The display according to claim 1 , wherein the first portions and the second portions are arranged so that the same shapes are repeated in an arrangement direction in which the partition wall layers are regularly arranged.

9. 9. The display according to claim 8, wherein the uniform shapes are arranged in any one of a stripe pattern, a half-moon pattern, a lattice pattern, a concentric circle pattern, and a wave pattern.

10. The thickness of the printing substrate is 15 μm or more and 200 μm or less, 2. The display according to claim 1, wherein the height of the partition wall layer is 5 [mu]m or more.

11. The display according to claim 1 , wherein at least one of the plurality of partition walls is formed by laminating different types of ink.

12. An image display layer is arranged on a printing substrate, and a plurality of partition layers are arranged regularly on the image display layer, and the image display layer includes, in the areas where the partition layers are not arranged, a first portion that displays a first color and a second portion that displays a second color different from the first color, and the observed color changes continuously due to a change in the ratio between the first portion and the second portion, the observation of which is obstructed by the partition layers, as the observation angle at which the image display layer is observed changes, the first portion and the second portion are in contact with the partition wall layer, the partition layer has a plurality of color regions each having a different color, a first color region on the first portion side having the first color, and a second color region on the second portion side having the second color.

13. The display according to claim 1 , wherein the plurality of partition walls are arranged in a checkerboard pattern on the image display layer.

14. The display according to claim 1 , wherein the partition layer, the first portion, and the second portion each include a reflective layer.

15. The display according to claim 14 , wherein the partition layer, the first portion, and the second portion extend together with the reflective layer in a direction perpendicular to the width direction and the thickness direction.

Images