Display body and display method

Abstract

The present invention provides a feature with which it is possible to brightly display an image. A display body (10) includes first and second portions (A1, A2) and can deform between a first state in which the first and second portions (A1, A2) are apart from each other and a second state in which the first and second portions (A1, A2) overlap. The first portion (A1) includes first and second regions (R1, R2), each having a shape extending in a first direction and each being alternatingly and regularly arranged in a second direction intersecting the first direction. Each of the first regions (R1) is a light-transmissive region provided with a light-deflecting structure having light deflecting properties, each of the second regions (R2) is a transparent region having a flat front surface and a flat back surface, the second portion (A2) is impossible or difficult to identify when observed in the first state without the first portion (A1) being interposed, and a latent image is recorded for which identification is possible or easy when observed in the second state with the first portion (A1) interposed.

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present invention relates to display technology. [Background technology]

[0002] 2. Description of the Related Art Conventionally, measures against counterfeiting have been taken for valuable securities, such as banknotes, stock certificates, gift certificates, and tickets, which are formed by providing a printing layer on a carrier made of polymer or paper.

[0003] For example, for the purpose of preventing counterfeiting, optical elements that are difficult to counterfeit or copy may be formed on or attached to a polymer carrier, such optical elements including, for example, a hologram or a phosphor.

[0004] In addition, there is also an optical element having a metal thin film with a line-like uneven structure (see Patent Document 1). Such an optical element has a so-called opal effect, in which the shading and brightness formed by the uneven structure changes when the observation angle is changed.

[0005] Printing is sometimes used to prevent counterfeiting of securities. For example, when the carrier is made of paper, watermark printing may be used (see Patent Document 2). Watermark printing involves printing on paper using transparent ink, creating a difference in transmittance between the printed and non-printed areas. When watermark-printed paper is held up to the light, shades of light and dark corresponding to the printed letters, pictures, etc. are displayed.

[0006] Before the development of watermark printing, watermarks had to be formed during the papermaking process, and they were highly effective in preventing counterfeiting. However, the development of watermark printing using transparent ink has progressed, and it has become easier to form watermarks. Therefore, it has become difficult to obtain a high level of counterfeit prevention effect using watermarks alone.

[0007] A latent image may also be recorded using lines. Lines can be formed by printing. That is, lines are printed on a carrier, with the phase of the linear portion of one portion shifted by 1 / 2 pitch from that of the other portion. The two portions are difficult or impossible to distinguish from each other when the print is observed with the naked eye. If a filter made of a transparent film is placed over the lines, which have the same width of linear portions and the same pitch of their arrangement, the moiré effect makes it possible to distinguish the two portions from each other.

[0008] In order to enhance the effect of preventing counterfeiting, it has also been proposed to use modified lines in which the pitch, width and shape of the linear portions are non-uniform (see Patent Document 1).

[0009] However, in the counterfeit prevention technology using parallel lines, authenticity cannot be determined without a verification tool, that is, the above-mentioned filter in which parallel lines are provided on a transparent film.

[0010] As an anti-counterfeiting technology using lines, it has been proposed to make it possible to determine the authenticity of a security using only the lines, that is, to make it possible to determine the authenticity without having to prepare a verification tool in advance (see Patent Document 3). This proposal involves recording a latent image using lines on one part of the security, and giving the other part the function of the filter described above. The latent image becomes visible by folding the security so that these parts overlap. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Publication No. 2004-174880 [Patent Document 2] Japanese Patent Publication No. 2000-290571 [Patent Document 3] Japanese Patent Application Publication No. 2014-223731 Summary of the Invention

[0012] In the above-mentioned filter, the lines act as a light-shielding filter, so it is difficult to brightly display the visible image obtained by visualizing the latent image with the above-mentioned technology. Therefore, an object of the present invention is to provide a technique capable of displaying a bright visible image.

[0013] According to one aspect of the present invention, there is provided a display device comprising first and second portions, and capable of deforming between a first state in which the first and second portions are spaced apart from each other and a second state in which the first and second portions overlap, the first portion being a light-transmitting region comprising first and second regions each having a shape extending in a first direction and arranged alternately and regularly in a second direction intersecting the first direction, and provided with a light deflection structure having light deflection properties, each of the second regions being a transparent region having a flat front surface and a flat back surface, and the second portion having recorded thereon a latent image which is impossible or difficult to distinguish when observed without the first portion in the first state, and which is possible or easy to distinguish when observed through the first portion in the second state.

[0014] Each of the first regions is provided with a light deflection structure having light deflection properties. For example, each of the first regions has light scattering properties or functions as a lenticular. Each of such first regions has light scattering properties or light diffusion properties. On the other hand, each of the second regions is a part of a transparent layer and is a region having a flat front surface and a flat back surface. That is, each of the second regions is a transparent region that does not have light scattering properties or light diffusion properties. Therefore, for example, when a specular reflector is installed on the back surface side of the first portion and illuminated from the oblique front, the second region emits light of higher intensity than the first region at an angle at which regular reflection light can be observed.

[0015] Therefore, when the display body is in the second state, for example, moire occurs due to interference between the periodic structure formed by the second region and the periodic structure provided in the second portion, or the second portion is partially hidden by the first region. As a result, an image different from the image recognized by the observer when observing in the first state without using the first portion is displayed. That is, it becomes possible or easy to distinguish a latent image that was impossible or difficult to distinguish when observing in the first state without using the first portion. In other words, the latent image is made visible.

[0016] In addition, in this display, the first regions correspond to a concealment filter. Each of the first regions has light transmissivity. Therefore, this display can display a bright visible image in the second state. In other words, the first regions conceal the image on the back side thereof while allowing illumination light to pass through.

[0017] According to another aspect of the present invention, there is provided a display according to the above aspect, in which the light deflection structure includes a lenticular. Alternatively, according to yet another aspect of the present invention, there is provided a display according to the above aspect, in which the light deflection structure includes a plurality of concave or convex portions arranged randomly or pseudo-randomly. The light deflection structure may be of any type as long as it has the above-mentioned functions. Since the above structure is a relief structure, it is suitable for manufacturing using transfer printing.

[0018] According to yet another aspect of the present invention, there is provided a display according to any one of the above aspects, in which the front surface and the rear surface are parallel to each other. As will be understood from the following description, the front surface and the rear surface may be parallel to each other or may have different orientations. Note that the different orientations of one surface and the other surface mean that the normal directions of those surfaces are different.

[0019] Alternatively, according to yet another aspect of the present invention, there is provided a display device relating to the above aspect, wherein the first portion has a flat first main surface and a second main surface which is the back surface of the flat first main surface, the second main surface is provided with a plurality of protrusions, each having a shape extending in the first direction and arranged regularly in the second direction, the surface of each of the plurality of protrusions includes a first light-scattering surface and a first flat surface, each having a shape extending in the first direction and arranged in the second direction, the first flat surface and the first light-scattering surface have orientations different from each other, the region of the first portion corresponding to the first light-scattering surface is at least a part of the first region, and the region of the first portion corresponding to the first flat surface is at least a part of the second region.

[0020] Alternatively, according to yet another aspect of the present invention, there is provided a display device comprising first and second portions, and deformable between a first state in which the first and second portions are spaced apart from each other and a second state in which the first and second portions overlap, the first portion being made of a transparent material and having a flat first main surface and a second main surface which is the back side of the first main surface, the second main surface being provided with a plurality of protrusions each having a shape extending in a first direction parallel to the main surface and regularly arranged in a second direction which is parallel to the second main surface and intersects the first direction, the surface of each of the plurality of protrusions each having a shape extending in the first direction and including a first light-scattering surface and a first flat surface arranged in the second direction, the first flat surface and the first light-scattering surface having mutually different orientations, and the second portion having recorded thereon a latent image which is impossible or difficult to distinguish when observed without the first portion in the first state, and which is possible or easy to distinguish when observed through the first portion in the second state.

[0021] In a display body employing the above configuration, when the display body is tilted, for example, around an axis parallel to the first direction while observing the latent image through the first portion in the second state, the ease of identifying the latent image changes. For example, when the tilt angle is a first angle, it is possible to make it impossible or difficult to identify the latent image, and when the tilt angle is a second angle different from the first angle, it is possible to make it possible or easy to identify the latent image. In other words, by employing the above configuration, more complex displays are possible.

[0022] According to yet another aspect of the present invention, there is provided a display according to any of the above aspects, in which the angle that the first flat surface makes with respect to a plane parallel to the first direction and the second direction is equal to the angle that the first light scattering surface makes with respect to the plane. Alternatively, according to yet another aspect of the present invention, there is provided a display according to any of the above aspects, in which the angle that the first flat surface makes with respect to a plane parallel to the first direction and the second direction is different from the angle that the first light scattering surface makes with respect to the plane. By adjusting these angles, it is possible to change the range of tilt angles at which it is impossible or difficult to identify a latent image and the range of tilt angles at which it is possible or easy to identify a latent image when the latent image is observed through the first portion in the second state.

[0023] According to yet another aspect of the present invention, there is provided a display device relating to any of the above aspects, in which each of the plurality of protrusions is a triangular prism having one side parallel to the first direction and the second direction and a height direction parallel to the first direction, the first flat surface being the other side of the triangular prism, and the first light scattering surface being the remaining side of the triangular prism.Alternatively, according to yet another aspect of the present invention, there is provided a display device relating to any of the above aspects, in which each of the plurality of protrusions is a quadrangular prism having one side parallel to the first direction and the second direction and a height direction parallel to the first direction, the first flat surface being the other side of the quadrangular prism, and the first light scattering surface being yet another side of the quadrangular prism.

[0024] As described above, each of the multiple protrusions is, for example, a polygonal prism having one side parallel to the first direction and the second direction and a height direction parallel to the first direction. In this case, the first flat surface is the other side of the polygonal prism, and the first light-scattering surface is the still other side of the polygonal prism.

[0025] According to yet another aspect of the present invention, there is provided a display according to any of the above aspects, in which each two of the plurality of adjacent protrusions are spaced apart from each other, and the second main surface has a second flat surface between each two of the plurality of adjacent protrusions.Alternatively, according to yet another aspect of the present invention, there is provided a display according to any of the above aspects, in which each two of the plurality of adjacent protrusions are spaced apart from each other, and the second main surface has a second light-scattering surface between each two of the plurality of adjacent protrusions.

[0026] Any two adjacent ones of the plurality of protrusions may be in contact with each other. When any two adjacent ones of the plurality of protrusions are spaced apart from each other, the second main surface may have a second flat surface or a second light-scattering surface between any two adjacent ones of the plurality of protrusions, as described above.

[0027] According to yet another aspect of the present invention there is provided a display according to any of the above aspects which includes a polymeric carrier. A carrier made of a polymer can be easily molded and can also be easily made flexible.

[0028] According to yet another aspect of the present invention, there is provided a display according to any one of the above aspects, wherein the first or second regions or the protrusions are arranged at a period within a range of 40 to 1000 μm. This period may be within a range of 50 to 1000 μm.

[0029] According to yet another aspect of the present invention, there is provided a display device relating to any of the above aspects, wherein the second portion is composed of a plurality of band-shaped regions regularly arranged in the width direction, and the latent image is recorded in the plurality of band-shaped regions.

[0030] According to yet another aspect of the present invention, there is provided a display device relating to the above aspect, wherein the second portion includes first and second display portions adjacent to each other, one or more of the plurality of strip-shaped regions each include first to fourth sub-regions, in each of the one or more of the plurality of strip-shaped regions, each of the first and second sub-regions displays a first color and each of the third and fourth sub-regions displays a second color different from the first color, the first and third sub-regions are arranged in the width direction in the first display portion, the second and fourth sub-regions are arranged in the width direction in the second display portion, and the first and second sub-regions are at different positions in the width direction.

[0031] Alternatively, according to yet another aspect of the present invention, there is provided a display device relating to the above aspect, wherein the second portion includes first and second display portions adjacent to each other, and one or more of the plurality of strip-shaped regions each include first to sixth sub-regions, and in each of the one or more of the plurality of strip-shaped regions, each of the first and second sub-regions displays a first color, each of the third and fourth sub-regions displays a second color different from the first color, and each of the fifth and sixth sub-regions displays a third color different from the first and second colors, the first, third and fifth sub-regions are arranged in the width direction in the first display portion, and the second, fourth and sixth sub-regions are arranged in the width direction in the second display portion, and the first and second sub-regions are positioned differently in the width direction, the third and fourth sub-regions are positioned differently in the width direction, and the fifth and sixth sub-regions are positioned differently in the width direction.

[0032] According to these configurations, for example, the first and second display portions can be indistinguishable from each other when observed with the naked eye in the first state, and can be distinguished from each other when observed with the naked eye in the second state. That is, a latent image corresponding to one of the first and second display portions can be recorded.

[0033] According to yet another aspect of the present invention, there is provided a display device relating to the above aspect, in each of one or more of the plurality of strip-shaped regions, the first, third and fifth sub-regions each have a different position in the width direction from each of the second, fourth and sixth sub-regions.

[0034] Alternatively, according to yet another aspect of the present invention, there is provided a display relating to the above aspect, wherein, in each of one or more of the plurality of strip-shaped regions, the first and fourth sub-regions are equally positioned in the width direction, the second and fifth sub-regions are equally positioned in the width direction, and the third and sixth sub-regions are equally positioned in the width direction. Thus, various arrangements of the sub-regions are possible.

[0035] According to yet another aspect of the present invention, there is provided a display device according to any one of the above aspects, wherein the first or second regions are arranged at a first period P1, the plurality of strip-shaped regions are arranged at a second period P2, and a ratio P1 / P2 of the first period P1 to the second period P2 is an integer. This configuration is suitable for visualizing the above-mentioned latent image.

[0036] Alternatively, according to yet another aspect of the present invention, there is provided a display according to any of the above aspects, in which the first or second region is arranged in a first period P1, the plurality of strip regions are arranged in a second period, and the ratio P1 / P2 of the first period P1 to the second period P2 is not an integer. This configuration is suitable for displaying an image in the second state in which the combination of the strip regions and the first and second regions has the same shape as an image obtained by stretching an image recorded in each strip region in the width direction. This configuration is also suitable for visualizing the above-mentioned latent image. When this configuration is employed, the ratio (P1-P2) / P2 of the difference between the first period P1 and the second period P2 to the second period P2 can be within a range of -0.25 to -0.10. It may also be within a range of 0.10 to 0.25.

[0037] According to yet another aspect of the present invention, there is provided a display body according to any of the above aspects, in which the display body has a rectangular shape, and the second direction and the width direction are both parallel to or both perpendicular to a long side of the display body. Alternatively, according to yet another aspect of the present invention, there is provided a display body according to any of the above aspects, in which the display body has a rectangular shape, and the second direction and the width direction are both inclined to a long side of the display body. When the display body has a rectangular shape, any of these configurations may be adopted.

[0038] According to yet another aspect of the present invention, there is provided a display body according to any of the above aspects, wherein the display body is in the form of a sheet or film, the first state is a state in which the display body is unfolded, and the second state is a state in which the display body is folded or bent. There is no limitation on the shape of the display body, but when it is in the form of a sheet or film, the range of applications is wide. For example, a sheet or film-shaped display body can be used as a security such as a bank note, a stock certificate, a gift certificate, or a ticket. When the display body is in the form of a sheet or film, the latent image can be visualized by a simple action such as folding or bending the sheet or film.

[0039] According to yet another aspect of the present invention, there is provided a display relating to the above aspect, wherein the display has a rectangular shape, and the first and second portions are arranged to be in the second state when the display is folded or bent so that an edge along one short side overlaps an edge along the other short side. With this arrangement, when the display body is transformed from the first portion to the second portion, the first and second portions can be easily aligned with respect to each other with high accuracy.

[0040] Alternatively, according to yet another aspect of the present invention, there is provided a display according to any one of the above aspects, in which the display is in the form of a booklet. The range of application is also wide when the display body is a booklet. The display body as a booklet can be used as, for example, a passport or a bankbook such as a bankbook. When the display body is a booklet, for example, the first part is one or a part of two page parts that overlap when the booklet is closed, and the second part is the page parts or a part of the page parts. Here, the "page part" is a part of the sheet constituting the booklet that corresponds to one page on the front side and one page on the back side. That is, the "page part" is a part of the sheet constituting the booklet where one page is assigned to one side and another page is assigned to the other side. For example, when the booklet includes a sheet folded in half, each of the two parts of the sheet divided by the fold is a "page part". The first state is, for example, a state in which the booklet is opened so that the page part including the first part and the page part including the second part are separated from each other. The second state is, for example, a state in which the booklet is opened so that the page part including the first part is exposed and located above the page including the second part. With this configuration, the latent image can be made visible by a simple action such as turning a page.

[0041] According to yet another aspect of the present invention, there is provided the display device according to any one of the above aspects, wherein the latent image is recorded in the second portion as a print. Although the latent image may be recorded by a method other than printing, it is easy to form the latent image by printing.

[0042] According to yet another aspect of the present invention, there is provided a display method including setting the display according to any one of the above aspects to the second state. With this method, it is not necessary to separately prepare a verification tool. Also, in the second state, it is possible to display a bright image. [Brief description of the drawings]

[0043] [Figure 1] FIG. 1 is a plan view illustrating a schematic structure of a display according to a first embodiment of the present invention when the display is in a first state. [Diagram 2] 3 is a cross-sectional view showing an example of a structure that can be adopted in a first portion included in the display body of FIG. 1. [Diagram 3]3 is a cross-sectional view showing an example of an embossing cylinder that can be used to manufacture a display having a first portion having the structure shown in FIG. 2. [Figure 4] 4 is a cross-sectional view showing a manufacturing process of a mother plate used for manufacturing the embossed cylinder shown in FIG. 3. [Diagram 5] 5A to 5C are cross-sectional views each showing a schematic diagram of another manufacturing process of the mother plate used for manufacturing the embossed cylinder shown in FIG. [Figure 6] 1. FIG. 4 is a cross-sectional view that shows another example of a structure that can be adopted in the first portion included in the display body shown in FIG. [Figure 7] 7 is a cross-sectional view showing an example of an embossing cylinder that can be used to manufacture a display having the structure shown in FIG. 6 in its first portion. [Figure 8] 8 is a cross-sectional view showing a manufacturing process of a mother plate used to manufacture the embossed cylinder shown in FIG. 7. [Figure 9] 2 is a cross-sectional view showing an example of a structure that can be adopted in a second portion of the display shown in FIG. 1. [Figure 10] 4 is a plan view illustrating a structure of the display unit of FIG. 1 when the display unit is in a second state. [Figure 11] 11 is an enlarged cross-sectional view of a portion of the structure shown in FIG. 10. [Figure 12] 11 is an enlarged cross-sectional view showing another part of the structure shown in FIG. 10. [Figure 13] FIG. 4 is a plan view illustrating an example of a structure that can be adopted for the first portion. [Figure 14] FIG. 4 is a plan view illustrating an example of a structure that can be adopted for the second portion. [Figure 15] 15 is a plan view showing a schematic state in which the first portion of FIG. 13 and the second portion of FIG. 14 are superimposed on each other. [Figure 16] 15 is a plan view showing an example of an image displayed in a first state by a display unit having the structures shown in FIGS. 13 and 14 in its first and second portions, respectively; FIG. [Figure 17] 15 is a plan view showing an example of an image displayed by a display unit having the structures shown in FIGS. 13 and 14 in the first and second portions, respectively, in a second state. FIG. [Figure 18]FIG. 11 is a plan view illustrating an example of a structure that can be adopted in the first portion in a display according to a second embodiment of the present invention. [Figure 19] FIG. 11 is a plan view illustrating an example of a structure that can be adopted in the second portion in a display according to a second embodiment of the present invention. [Figure 20] 20 is a plan view illustrating a state in which the first portion of FIG. 18 and the second portion of FIG. 19 are superimposed on each other. [Figure 21] FIG. 11 is a plan view illustrating an example of a structure that can be adopted in the second portion in a display according to a third embodiment of the present invention. [Figure 22] 22 is a plan view that shows a schematic diagram of the first portion of FIG. 18 and the second portion of FIG. 21 superimposed on each other. [Figure 23] FIG. 13 is a plan view illustrating an example of a structure that can be adopted in the first portion in a display according to a fourth embodiment of the present invention. [Figure 24] FIG. 13 is a plan view illustrating an example of a structure that can be adopted in the second portion in a display according to a fourth embodiment of the present invention. [Diagram 25] 25 is a plan view showing a schematic state in which the first portion of FIG. 23 and the second portion of FIG. 24 are superimposed on each other. [Figure 26] FIG. 13 is a partially cutaway perspective view illustrating a display according to a fifth embodiment of the present invention. [Figure 27] 27 is another partially cutaway perspective view of the display unit shown in FIG. 26. [Figure 28] FIG. 28 is a diagram illustrating a state in which an observer observes the display of FIGS. 26 and 27. [Figure 29] FIG. 28 is a diagram showing an example of an image displayed by the display unit of FIGS. 26 and 27 in a second state. [Diagram 30] 28 is a diagram showing another example of an image displayed by the display unit of FIGS. 26 and 27 in the second state. FIG. [Diagram 31] FIG. 13 is a partially cutaway perspective view illustrating an example of a structure that can be adopted in the first portion of a display according to a sixth embodiment of the present invention. [Diagram 32] FIG. 32 is another partially cut away perspective view of the structure shown in FIG. 31 . [Diagram 33]FIG. 13 is a cross-sectional view illustrating an example of a structure that can be adopted in the first portion in a display according to a seventh embodiment of the present invention. [Diagram 34] FIG. 23 is a cross-sectional view illustrating an example of a structure that can be adopted in the first portion in a display according to an eighth embodiment of the present invention. [Diagram 35] FIG. 13 is a cross-sectional view illustrating an example of a structure that can be adopted in the first portion in a display according to a ninth embodiment of the present invention. [Diagram 36] FIG. 23 is a plan view illustrating a display according to a tenth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0044] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiment described below is a more specific embodiment of any of the above aspects. Elements having the same or similar functions are given the same reference numerals, and duplicated descriptions will be omitted.

[0045] First Embodiment FIG. 1 is a plan view that illustrates a schematic structure of a display according to a first embodiment of the present invention when the display is in a first state.

[0046] The display 10 shown in Fig. 1 is a rectangular sheet or film. In the figure, the X direction is a direction parallel to the long side of the display 10, the Y direction is a direction parallel to the short side of the display 10, and the Z direction is a thickness direction of the display 10, i.e., a direction perpendicular to the X and Y directions.

[0047] The display 10 includes a carrier 11. The carrier 11 may be a sheet or a film. The carrier 11 may be a plastic sheet or a plastic film. The outer shape of the carrier 11 may be rectangular.

[0048] The thickness of the carrier 11 is preferably within the range of 0.05 mm to 0.3 mm. If it is thinner than this, it is prone to wrinkles, and if it is thicker than this, it is difficult to bend.

[0049] The short side of the carrier 11 is preferably in the range of 50 mm to 100 mm. If the short side is too short, it is difficult to form a pattern. If the short side is too long, it is difficult to carry the display unit 10. The long side of the carrier 11 is preferably within a range of 125 mm to 200 mm, inclusive, since it is easy to bend the carrier 11 within this range.

[0050] The aspect ratio of the carrier 11 is preferably within a range of 1:1.5 to 1:3. If the aspect ratio is within this range, the display 10 is easy to fold.

[0051] The material of the carrier 11 may be a thermoplastic resin. Thermoplastic resins are less likely to cause crack defects when folded. Examples of thermoplastic resins include photocurable resins such as biaxially oriented polypropylene (BOPP), 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, phenol resin, melamine resin, urea resin, and alkyd resin; or thermoplastic resins such as polypropylene resin, polyethylene terephthalate resin, and polyacetal resin.

[0052] Alternatively, the carrier 11 may be made of a thermosetting resin, such as a urethane resin, a melamine-based resin, an epoxy resin, a phenol-based resin, a mixture thereof, or a copolymer thereof.

[0053] Alternatively, the carrier 11 may be made of UV-curable resins such as urethane acrylate, acrylic resin acrylate, and epoxy acrylate.

[0054] The carrier 11 is provided with a first portion A1 and a second portion A2. The first portion A1 and the second portion A2 are parallel to the short side of the carrier 11 and are symmetrical with respect to a straight line L that bisects the carrier 11. It is preferable that the first portion A1 and the second portion A2 overlap at a position that is within ⅓ of the distance from the end of the short side to the straight line L when the display body 10 is bisected along one side of the straight line L and folded.

[0055] FIG. 2 is a cross-sectional view that illustrates an example of a structure that can be adopted for the first portion included in the display body of FIG.

[0056] 2 includes a first region R1 and a second region R2. The first region R1 and the second region R2 each have a shape extending in a first direction, here the X direction. The first region R1 and the second region R2 are alternately and regularly arranged in a second direction intersecting the first direction, here the Y direction.

[0057] Each of the first regions R1 has light scattering properties. Here, each of the first regions R1 has randomly arranged concave or convex portions on one surface. Each of the first regions R1 has a width W1. The first regions R1 are arranged with a first period P1 in the Y direction.

[0058] Each of the second regions R2 is a transparent region having a flat front surface and a flat back surface. The front surface and the back surface are parallel to each other. Each of the second regions R2 has a width W2. The second regions R2 are arranged with a first period P1 in the Y direction.

[0059] Fig. 3 is a cross-sectional view showing an example of an embossing cylinder that can be used to manufacture a display having a first portion that employs the structure shown in Fig. 2. Note that Fig. 3 shows only a portion of the embossing cylinder.

[0060] The embossing cylinder 20 shown in Fig. 3 has a cylindrical metal base material 21. The cylindrical surface of the metal base material 21 is provided with convex or concave portions corresponding to the concave or convex portions of the first region R1. The carrier 11 in Fig. 2 can be manufactured by, for example, transfer using this embossing cylinder 20.

[0061] Fig. 4 is a cross-sectional view showing a schematic diagram of one manufacturing process of a mother plate used to manufacture the embossed cylinder shown in Fig. 3. Fig. 5 is a cross-sectional view showing a schematic diagram of another manufacturing process of a mother plate used to manufacture the embossed cylinder shown in Fig. 3.

[0062] The mother plate used to manufacture the embossed cylinder 20 shown in FIG. 3 is manufactured, for example, by the following method. 4, a mask layer 32 is formed on the main surface of a mold base material 31. The mask layer 32 has a pattern formed thereon that corresponds to the second region R2 and a portion other than the first portion A1.

[0063] The mask layer 32 can be obtained, for example, by applying a photoresist to the main surface of the mold substrate 31, partially exposing the photoresist layer to light, and then developing the photoresist layer. Alternatively, the mask layer 32 can be formed, for example, by printing ink on the main surface of the mold substrate 31.

[0064] This high-definition printing is, for example, silk screen printing or gravure offset printing. Gravure offset printing makes it easier to achieve high definition compared to other printing methods. Gravure printing and offset printing can also be used as high-definition printing.

[0065] Examples of the varnish (vehicle) constituting the ink include polyolefin resins such as polyethylene resins and chlorinated polypropylene resins, poly(meth)acrylic resins, polyvinyl chloride resins, polyvinyl acetate resins, vinyl chloride-vinyl acetate copolymers, polystyrene resins, styrene-butadiene copolymers, vinylidene fluoride resins, polyvinyl alcohol resins, polyvinyl acetal resins, polyvinyl butyral resins, polybutadiene resins, polyester resins, polyamide resins, alkyd resins, epoxy resins, unsaturated polyester resins, thermosetting poly(meth)acrylic resins, melamine resins, urea resins, polyurethane resins, phenolic resins, xylene resins, maleic acid resins, cellulose resins such as nitrocellulose, ethyl cellulose, acetylbutyl cellulose, and ethyloxyethyl cellulose, rubber resins such as chlorinated rubber and cyclized rubber, petroleum resins, natural resins such as rosin and casein, oils and fats such as linseed oil and soybean oil, and other resins. One or a mixture of two or more of these resins can be used. The varnish may contain one or more additives selected from colorants such as dyes and pigments, fillers, stabilizers, plasticizers, antioxidants, light stabilizers such as ultraviolet absorbers, dispersants, thickeners, drying agents, lubricants, antistatic agents, crosslinking agents, and other additives. The ink is obtained by thoroughly kneading these with a solvent or diluent.

[0066] Next, the main surface of the mold substrate 31 is chemically or physically etched. For example, the main surface is chemically etched, electrolytically etched, scraped, wire brushed, sandblasted, or liquid honed. Alternatively, for example, the main surface is electroplated. This electroplating can be a dispersion plating method.

[0067] Thereafter, the mask layer 32 is removed from the main surface. In this manner, the mother plate is obtained. The embossed cylinder 20 shown in Fig. 3 is obtained, for example, by fixing the mother plate to a cylinder.

[0068] FIG. 6 is a cross-sectional view that illustrates a schematic example of another structure that can be adopted for the first portion included in the display body illustrated in FIG.

[0069] In the first portion A1 shown in Fig. 6, the first region R1 functions as a lenticular extending in the length direction of the first region R1. Other than this, the first portion A1 shown in Fig. 6 is similar to the first portion A1 described with reference to Fig. 2 etc.

[0070] FIG. 7 is a cross-sectional view that shows an outline of an example of an embossing cylinder that can be used to manufacture a display having the structure shown in FIG. 6 in its first portion.

[0071] The embossing cylinder 20 shown in Fig. 7 is similar to the embossing cylinder 20 described with reference to Fig. 3 etc., except that a convex portion corresponding to a lenticular is provided at a position corresponding to the first region R1 on the cylindrical surface of the metal base material 21. A carrier 11 having the structure of Fig. 6 in the first portion A1 can be manufactured by, for example, transfer using this embossing cylinder 20.

[0072] 8A to 8C are cross-sectional views each showing a schematic process for producing a mother plate used in producing the embossed cylinder shown in FIG.

[0073] In manufacturing this mother plate, for example, first, as described with reference to FIG. 4, a mask layer 32 is formed on the main surface of a mold substrate 31. Next, this main surface is subjected to chemical or physical etching. Thereafter, the mask layer 32 is removed from the mold substrate 31. In this manner, the mother plate is obtained.

[0074] FIG. 9 is a cross-sectional view that illustrates an example of a structure that can be adopted for the second portion of the display shown in FIG.

[0075] 9, a printed layer 12 is provided on a carrier 11. The printed layer 12 is formed by, for example, inkjet printing or laser printing.

[0076] The printing layer 12 forms a plurality of parallel lines. The lines constituting each line are parallel to the X direction and are arranged in the Y direction. The lines have the same width of the linear portion and the same arrangement pitch. Adjacent lines have linear portions that are out of phase with each other. The lines form a latent image that is impossible or difficult to distinguish when observed with the naked eye without passing through the first portion.

[0077] Here, as an example, the printed layer 12 forms two parallel lines. In the second portion A2, a portion corresponding to one of the parallel lines and a portion corresponding to the other of the lines respectively correspond to a first display portion DP1 and a second display portion DP2, which will be described later. Also, here, as an example, the printed layer 12 is made of black ink.

[0078] The lines may be formed by laser engraving instead of by the printing layer 12. In this case, the carrier 11 may contain, for example, a heat-sensitive coloring agent. When the carrier 11 is a plastic film, the plastic of the carrier 11 can be partially carbonized to form the lines.

[0079] FIG. 10 is a plan view that illustrates a schematic structure of the display of FIG. 1 when it is in a second state.

[0080] The display 10 shown in FIG. 10 is the display 10 shown in FIG. 1 folded in half along the straight line L. When the display 10 is folded in this manner, the first portion A1 and the second portion A2 overlap, and the second portion A2 can be observed through the first portion A1. In this state, the latent image can or becomes easily identifiable. In other words, the latent image becomes visible. In FIG. 10, the character string "SECURE" is drawn as the visible image.

[0081] The mechanism by which a latent image is visualized will be described with reference to Fig. 11 and Fig. 12. Fig. 11 is a cross-sectional view showing an enlarged view of a part of the structure shown in Fig. 10. Fig. 12 is a cross-sectional view showing an enlarged view of another part of the structure shown in Fig. 10.

[0082] Fig. 11 illustrates a portion of the structure shown in Fig. 10 that corresponds to one of the two lines described above. Fig. 12 illustrates a portion of the structure shown in Fig. 10 that corresponds to the other of the two lines described above.

[0083] 11, the first region R1 faces the opening of the printed layer 12, and the second region R2 faces the lines formed by the printed layer 12. On the other hand, in FIG. 12, the first region R1 faces the lines formed by the printed layer 12, and the second region R2 faces the opening of the printed layer 12.

[0084] As described above, the first region R1 has light scattering properties, and the second region R2 is a transparent region. Therefore, for example, when the structure shown in Figures 10 to 12 is placed on a white stand such that the second portion A2 is located between the stand and the first portion A1, and the first portion A1 is illuminated from above at an angle at which the regular reflected light can be observed, the portion shown in Figure 12 appears to have a different color from the portion shown in Figure 11. For example, the portion shown in Figure 12 appears brighter than the portion shown in Figure 11. In this way, the latent image is visualized.

[0085] In addition, the first region R1 is optically transparent, and therefore the image can be displayed brighter than in the case where the first region R1 includes, for example, a black printed layer.

[0086] This visualization will be further explained with reference to FIGS. Fig. 13 is a plan view that shows a schematic example of a structure that can be adopted for the first portion. Fig. 14 is a plan view that shows a schematic example of a structure that can be adopted for the second portion. Fig. 15 is a plan view that shows a state in which the first portion of Fig. 13 and the second portion of Fig. 14 are superimposed. Fig. 16 is a plan view that shows a schematic example of an image displayed in a first state by a display device that adopts the structures of Figs. 13 and 14 for the first and second portions, respectively. Fig. 17 is a plan view that shows a schematic example of an image displayed in a second state by a display device that adopts the structures of Figs. 13 and 14 for the first and second portions, respectively.

[0087] 13, the first regions R1 each extend in the Y direction and are arranged in the X direction. The first regions R1 or the second regions R2 are arranged with a first period P1. The ratio W1 / W2 of the width W1 of the first region R1 to the width W2 of the second region R2 is 1 / 3.

[0088] 14 is composed of a plurality of strip regions BR each extending in the Y direction and arranged in the X direction. The strip regions BR are arranged at a second period P2. The ratio P1 / P2 of the first period P1 to the second period P2 is 1.

[0089] The second portion A2 includes a first display portion DP1 and a second display portion DP2 adjacent to each other. One of the first display portion DP1 and the second display portion DP2 forms a latent image.

[0090] Each band-shaped region BR includes a plurality of cells C arranged in the X and Y directions. Some of the cells C display a first color, and the remaining cells C display a second color different from the first color. The portion displaying the first color corresponds to the portion where the above-mentioned printed layer 12 is provided. In one example, the first color is black, and the second color is white. The first and second colors can be chromatic or achromatic.

[0091] Each part of the printed layer 12 corresponding to the cells C displaying the first color is, for example, circular or rectangular. Each part of the printed layer 12 corresponding to the cells C displaying the first color may be elliptical or rectangular. All or some of the parts corresponding to the cells C displaying the first color may be the same shape and size, or all or some of them may be different in shape, size, or both. In addition, the dimensions of these parts or the pitch of the array of the cells C are, for example, in the range of 5 μm to 500 μm. If this pitch is too small, that is, if it is smaller than 5 μm, it becomes difficult to align the first part A1 and the second part A2. If this pitch is 5 μm or more, it becomes easy to distinguish the first display part DP1 and the second display part DP2 from each other in the first state. If it is 500 μm or less, it is difficult to recognize the deterioration of the image displayed by the cells C.

[0092] One or more of the strip regions BR includes sub-regions SR1 to SR4. The sub-regions SR1 and SR2 are first and second sub-regions, respectively, each of which displays a first color. The sub-regions SR3 and SR4 are third and fourth sub-regions, respectively, each of which displays a second color. The widths of the sub-regions SR1 and SR2 are equal to the width W1 of the first region R1.

[0093] In each strip region BR including the sub-regions SR1 to SR4, the sub-regions SR1 and SR3 are arranged in the width direction in the first display portion DP1, and the sub-regions SR2 and SR4 are arranged in the width direction in the second display portion DP2, with the sub-regions SR1 and SR2 being positioned differently in the width direction. Here, the positions of the sub-regions SR1 and SR2 in the width direction are shifted by half the second period P2. This shift is so small that it is impossible or difficult to distinguish the first display portion DP1 and the second display portion DP2 from each other when observing the second portion A2 with the naked eye without passing through the first portion A1.

[0094] One or more of the strip regions BR may include only the sub-regions SR1 and SR3. That is, one or more of the strip regions BR may be entirely located in the first display section DP1. Similarly, one or more of the strip regions BR may include only the sub-regions SR2 and SR4. That is, one or more of the strip regions BR may be entirely located in the second display section DP2.

[0095] 15, when the first portion A1 and the second portion A2 are overlapped so that the first region R1 faces the sub-region SR2, the influence of the sub-regions SR1 and SR3 on the display at the position of the first display portion DP1 differs from the influence of the sub-regions SR2 and SR4 on the display at the position of the second display portion DP2, causing the latent image to become visible.

[0096] For example, when the second portion A2 is observed with the naked eye without passing through the first portion A1, the first display portion DP1 and the second display portion DP2 appear to have the same color, and it is impossible or difficult to distinguish them from each other, as shown in Fig. 16. In contrast, when the second portion A2 is observed with the naked eye through the first portion A1, the first display portion DP1 and the second display portion DP2 appear to have different colors, as shown in Fig. 17. Therefore, it is possible to easily distinguish them from each other.

[0097] The color of the colored sub-regions of the band-shaped region BR does not have to be black or white, and may be, for example, one or more of cyan, yellow, and magenta.

[0098] <Second embodiment> Fig. 18 is a plan view showing an example of a structure that can be adopted for a first portion in a display according to a second embodiment of the present invention. Fig. 19 is a plan view showing an example of a structure that can be adopted for a second portion in a display according to a second embodiment of the present invention. Fig. 20 is a plan view showing a state in which the first portion in Fig. 18 and the second portion in Fig. 19 are superimposed.

[0099] The display 10 shown in FIGS. 18 to 20 is similar to the display 10 described in the first embodiment, except for the following points.

[0100] That is, in the first portion A1 of FIG. 18, the ratio W1 / W2 of the width W1 of the first region R1 to the width W2 of the second region R2 is 1.

[0101] 19, the second period P2 of the arrangement of the band-shaped regions BR is different from the first period P1 of the arrangement of the first region R1 or the second region R2. Here, the ratio P1 / P2 of the first period P1 to the second period P2 is 1 / 3. Note that the second period P2 is small enough that the sub-regions SR1a to SR1c and SR3 perform color display by subtractive color mixing, and the sub-regions SR2a to SR2c and SR4 perform color display by subtractive color mixing.

[0102] One or more of the band-shaped regions BR include sub-regions SR1a to SR1c, SR2a to SR2c, SR3 and SR4. Each of the sub-regions SR1a and SR2a displays a first color, each of the sub-regions SR1b and SR2b displays a second color different from the first color, each of the sub-regions SR1c and SR2c displays a third color different from the first and second colors, and each of the sub-regions SR3 and SR4 displays a fourth color different from the first to third colors.

[0103] In the first display section DP1, the sub-regions SR1a to SR1c are arranged in the width direction with the sub-region SR3 sandwiched therebetween. In the second display section DP2, the sub-regions SR2a to SR2c are arranged in the width direction with the sub-region SR4 sandwiched therebetween. The sub-regions SR1a to SR1c and SR2a to SR2c have the same width dimension. Here, the widths of the sub-regions SR1a to SR1c and SR2a to SR2c are 2 / 3 of the width W1 of the first region R1. The arrangement of the sub-regions SR1a to SR1c and the arrangement of the sub-regions SR2a to SR2c are out of phase with each other by 4 / 9 of the second period P2.

[0104] One or more of the strip regions BR may include only the sub-regions SR1a to SR1c and SR3. That is, one or more of the strip regions BR may be entirely located in the first display section DP1. Similarly, one or more of the strip regions BR may include only the sub-regions SR2a to SR2c and SR4. That is, one or more of the strip regions BR may be entirely located in the second display section DP2.

[0105] 20, when the first portion A1 and the second portion A2 are overlapped so that the first region R1 faces the sub-regions SR2a to SR2c, the influence of the sub-regions SR1a to SR1c and SR3 on the display at the position of the first display section DP1 differs from the influence of the sub-regions SR2a to SR2c and SR4 on the display at the position of the second display section DP2, causing the latent image to become visible.

[0106] <Third embodiment> Fig. 21 is a plan view showing an example of a structure that can be adopted for the second part in the display according to the third embodiment of the present invention, and Fig. 22 is a plan view showing a state in which the first part in Fig. 18 and the second part in Fig. 21 are superimposed.

[0107] The display 10 shown in FIGS. 21 and 22 is similar to the display 10 described in the second embodiment, except for the following points.

[0108] That is, in the second portion A2 in Fig. 21, the ratio P1 / P2 of the first period P1 to the second period P2 is 1 / 2. The arrangement of the sub-regions SR1a to SR1c and the arrangement of the sub-regions SR1a and SR2b are out of phase with each other by 1 / 3 of the second period P2. That is, in the strip region BR including the sub-regions SR1a to SR1c, SR2a to SR2c, SR3 and SR4, the sub-regions SR1a and SR2b are adjacent to each other in the length direction, the sub-regions SR1b and SR2c are adjacent to each other in the length direction, and the sub-regions SR1c and SR2a are adjacent to each other in the length direction.

[0109] When the first portion A1 and the second portion A2 are overlapped as shown in Fig. 22, the influence of the sub-regions SR1a to SR1c and SR3 on the display at the position of the first display section DP1 differs from the influence of the sub-regions SR2a to SR2c and SR4 on the display at the position of the second display section DP2. Specifically, the influence of the sub-region SR1c on the display at the position of the first display section DP1 is the smallest, and the influence of the sub-region SR2a on the display at the position of the second display section DP2 is the smallest. As a result, the latent image is visualized.

[0110] <Fourth embodiment> Fig. 23 is a plan view showing an example of a structure that can be adopted for the first part in a display according to a fourth embodiment of the present invention. Fig. 24 is a plan view showing an example of a structure that can be adopted for the second part in a display according to a fourth embodiment of the present invention. Fig. 25 is a plan view showing a state in which the first part in Fig. 23 and the second part in Fig. 24 are superimposed.

[0111] The display 10 shown in FIGS. 23 to 25 is similar to the display 10 described in the second embodiment, except for the following points.

[0112] 23, the first region R1 and the second region R2 extend in a direction inclined with respect to the X direction and are alternately arranged in the width direction. Here, as an example, the length directions of the first region R1 and the second region R2 form an angle of 45° with respect to the X direction.

[0113] 24, the length direction of the strip region BR is inclined with respect to the X direction. Here, as an example, the length direction of the strip region BR forms an angle of 45° with respect to the X direction.

[0114] The arrangement of the sub-regions SR1a to SR1c and the arrangement of the sub-regions SR2a to SR2c are out of phase with each other by 2 / 9 of the second period P2.

[0115] When the first portion A1 and the second portion A2 are superimposed as shown in FIG. 25, the influence of the sub-regions SR1a to SR1c and SR3 on the display at the position of the first display portion DP1 differs from the influence of the sub-regions SR2a to SR2c and SR4 on the display at the position of the second display portion DP2. Specifically, in each of the first display portion DP1 and the second display portion DP2, a color change occurs in the arrangement direction of the sub-regions at a period longer than the second period P2. If this period is sufficiently long, the color change in each of the first display portion DP1 and the second display portion DP2 can be confirmed with the naked eye. Also, if the period is sufficiently long, the difference in color between the first display portion DP1 and the second display portion DP2 at the boundary position between them can be confirmed. Therefore, the first display portion DP1 and the second display portion DP2 become distinguishable from each other. That is, the latent image is visualized.

[0116] <Fifth embodiment> Fig. 26 is a partially cutaway perspective view showing a display according to a fifth embodiment of the present invention, Fig. 27 is another partially cutaway perspective view showing the display shown in Fig. 26.

[0117] The display 10 shown in FIGS. 26 and 27 is similar to the display 10 described in the first embodiment, except for the following points.

[0118] 26 and 27 has a flat first main surface and a second main surface which is the reverse side of the flat first main surface. The second main surface has a plurality of protrusions PR each having a shape extending in a first direction, here the Y direction, and regularly arranged in a second direction, here the X direction.

[0119] The height of these protrusions PR is preferably 10 μm or more and 500 μm or less. The width of these protrusions PR is preferably 10 μm or more and 500 μm or less. The aspect ratio obtained by dividing the height by the width can be 0.05 or more and 1 or less.

[0120] The shape of these protrusions when observed from a direction perpendicular to the first main surface, i.e., when viewed in a plan view, can be straight or curved. The curved shape can be a sine wave shape. Furthermore, these protrusions PR can be parallel or non-parallel.

[0121] Each protrusion PR is a triangular prism with one side parallel to the first direction and the second direction and a height direction parallel to the first direction. A second partial region S2 and a third partial region S3 described later are the other side and the remaining side of this triangular prism, respectively.

[0122] Each pair of adjacent protrusions PR are spaced apart from each other. In the second main surface of the first portion A1, a region located between each pair of adjacent protrusions PR is a first partial region S1 having a shape extending in the first direction.

[0123] Each surface of the protrusion PR includes a second partial region S2 and a third partial region S3 that are arranged in the second direction and each have a shape extending in the first direction. The second partial region S2 and the third partial region S3 have different orientations. The angle that the second partial region S2 makes with respect to a plane parallel to the first and second directions is equal to the angle that the third partial region S3 makes with the plane.

[0124] Here, the second partial region S2 and the first partial region S1 are the first light scattering surface and the second light scattering surface, respectively. Specifically, each of the first partial region S1 and the second partial region S2 has randomly arranged concave or convex portions. The first partial region S1 and the second partial region S2 constitute the first region R1. Here, the third partial region S3 is the first flat surface. The third partial region S3 constitutes the second region R2. The angle that the first flat surface makes with respect to a plane parallel to the first direction and the second direction is equal to the angle that the first light scattering surface makes with the previous plane.

[0125] In the second portion A2 in Figures 26 and 27, the printed layer 12 is made up of a plurality of linear portions. These linear portions are arranged in the width direction. The printed layer 12 includes a plurality of regions in which the linear portions differ from one another in one or more of the length direction, length, width, and arrangement pitch. These regions form a latent image that is impossible or difficult to distinguish when observed with the naked eye without passing through the first portion A1 in the first state in which the first portion A1 and the second portion A2 are separated from each other.

[0126] This latent image becomes distinguishable or easily identifiable by observing under the conditions described below, that is, the latent image becomes visible.

[0127] Fig. 28 is a diagram that shows a schematic view of an observer observing the display body of Figs. 26 and 27. Fig. 29 is a diagram that shows an example of an image displayed by the display body of Figs. 26 and 27 in the second state. Fig. 30 is a diagram that shows another example of an image displayed by the display body of Figs. 26 and 27 in the second state. Here, in the second state in which the first portion A1 and the second portion A2 overlap each other, the length direction of the protrusion PR intersects with the length direction of the linear portion that constitutes the printing layer 12, as shown in Figs. 26 and 27.

[0128] In Fig. 28, the display 10 is in the second state. Also, in Fig. 28, viewers OP1 to OP3 view the second portion A2 through the first portion A1 from the length direction of the protrusion PR, which is a direction perpendicular to the Y direction here.

[0129] The observation direction of the observer OP1 is within an angle range in which the third partial region S3 is hidden by the second partial region S2 and cannot be seen. As described above, the first partial region S1 and the second partial region S2 are light scattering surfaces. Therefore, under this observation condition, the third partial region S3 does not contribute to the display, and the second main surface of the first portion A1 behaves as a whole as a light scattering surface. Therefore, to the observer OP1, the display 10 appears to be displaying an entirely white image, as shown in FIG.

[0130] The observation direction of the observer OP2 is approximately perpendicular to the second main surface of the first portion A1. In this case, all of the first partial region S1, the second partial region S2, and the third partial region S3 can contribute to the display. As described above, the first partial region S1 and the second partial region S2 are light scattering surfaces, and the third partial region S3 is a flat surface. Therefore, under this observation condition, the first portion A1 serves as a filter in which the second region R2 corresponding to the third partial region S3 has a higher transmittance than the first partial region S1 and the first region R1 corresponding to the second partial region S2. As a result, the moiré effect makes it possible or easy for the observer OP2 to identify the latent image. That is, as shown in FIG. 30, the latent image is visualized.

[0131] The angle that the observation direction of the observer OP3 makes with respect to the third partial region S3 is larger than the angle that the observation direction of the observer OP2 makes with respect to the third partial region S3. When this angle is increased, the contribution of the second partial region S2 to the display decreases and the contribution of the third partial region S3 to the display increases. Therefore, the visible image is displayed more clearly.

[0132] Sixth Embodiment Fig. 31 is a partially cutaway perspective view showing an example of a structure that can be adopted in the first portion in a display according to a sixth embodiment of the present invention, and Fig. 32 is another partially cutaway perspective view of the structure shown in Fig. 31.

[0133] The display 10 shown in FIGS. 31 and 32 is similar to the display 10 described in the fifth embodiment, except for the following points.

[0134] That is, in the first portion A1 in Figs. 31 and 32, the second partial region S2 is the first light scattering surface. Specifically, the second partial region S2 has randomly arranged concave or convex portions. The second partial region S2 constitutes the first region R1. The third partial region S3 and the first partial region S1 are the first flat surface and the second flat surface, respectively. The first partial region S1 and the third partial region S3 constitute the second region R2. The angle that the first flat surface makes with respect to a plane parallel to the first direction and the second direction is equal to the angle that the first light scattering surface makes with the previous plane.

[0135] Except for using this display 10, when observed under similar conditions as those shown in FIG. 28, the display 10 displays an image as described below.

[0136] The observation direction of the observer OP3 is approximately parallel to the second partial region S2. Here, the third partial region S3 and the first partial region S1 are the first flat surface and the second flat surface, respectively. Therefore, under this observation condition, the second partial region S2 hardly contributes to the display, and the first portion A1 behaves as if it were entirely transparent. Therefore, the observer OP3 sees the image displayed by the printing layer 12 as it is.

[0137] The observation direction of the observer OP2 is approximately perpendicular to the second main surface of the first portion A1. In this case, all of the first partial region S1, the second partial region S2, and the third partial region S3 can contribute to the display. As described above, the first partial region S1 and the third partial region S3 are flat surfaces, and the second partial region S2 is a light scattering surface. Therefore, under this observation condition, the first portion A1 serves as a filter in which the second region R2 corresponding to the first partial region S1 and the third partial region S3 has a higher transmittance than the first region R1 corresponding to the second partial region S2. As a result, the moiré effect makes it possible or easy for the observer OP2 to distinguish the latent image.

[0138] The angle that the observation direction of the observer OP1 makes with respect to the second partial region S2 is larger than the angle that the observation direction of the observer OP2 makes with respect to the second partial region S2. When this angle is increased, the contribution of the third partial region S3 to the display decreases and the contribution of the second partial region S2 to the display increases. Therefore, the visible image is displayed more clearly.

[0139] Seventh embodiment FIG. 33 is a cross-sectional view that illustrates an example of a structure that can be adopted for the first portion in the display according to the eighth embodiment of the present invention.

[0140] The display 10 shown in FIG. 33 is similar to the display 10 described in the fifth embodiment, except for the following points.

[0141] That is, in the first portion A1 of Fig. 33, the angle that the second partial region S2 makes with respect to a plane parallel to the first and second directions is different from the angle that the third partial region S3 makes with respect to the previous plane. Specifically, the angle that the second partial region S2 makes with respect to the previous plane is smaller than the angle that the third partial region S3 makes with respect to the previous plane. Note that the second partial region S2 is the first flat surface, the third partial region S3 is the first light scattering region, and the first partial region S1 is the second light scattering surface.

[0142] When this structure is adopted, the angle range in which the white image described with reference to Fig. 29 is observed becomes larger than when the structure described with reference to Fig. 26 and Fig. 27 is adopted. Also, when this structure is adopted, the angle range in which the visible image described with reference to Fig. 30 is observed becomes smaller than when the structure described with reference to Fig. 26 and Fig. 27 is adopted.

[0143] When a structure is adopted in which the angle that the second partial region S2 makes with respect to a plane parallel to the first and second directions is larger than the angle that the third partial region S3 makes with respect to the plane, the angle range in which the white image described with reference to Fig. 29 is observed becomes smaller than when the structure described with reference to Fig. 26 and Fig. 27 is adopted. Also, when this structure is adopted, the angle range in which the visible image described with reference to Fig. 30 is observed becomes larger than when the structure described with reference to Fig. 26 and Fig. 27 is adopted.

[0144] Eighth embodiment FIG. 34 is a cross-sectional view that illustrates an example of a structure that can be adopted for the first portion in the display according to the eighth embodiment of the present invention.

[0145] The display 10 shown in FIG. 34 is similar to the display 10 described in the fifth embodiment, except for the following points.

[0146] That is, in the first portion A1 of Fig. 34, each of the protrusions PR is a rectangular prism with one side parallel to the first direction and the second direction and a height direction parallel to the first direction. Here, the cross section perpendicular to the height direction of each rectangular prism is a right-angled rectangle. The two side surfaces perpendicular to the second direction of each rectangular prism, i.e., the two side surfaces of the protrusion PR, are the second partial region S2 and the third partial region S3. Also, one of the side surfaces parallel to the second direction of each rectangular prism, i.e., the top surface of the protrusion PR, is the fourth partial region S4.

[0147] The fourth partial region S4 and the first partial region S1 are the first light scattering surface and the second light scattering surface, respectively. Specifically, the first partial region S1 and the fourth partial region S4 have randomly arranged concave or convex portions. The first partial region S1 and the fourth partial region S4 constitute the first region R1. The second partial region S2 and the third partial region S3 are the first flat surface and the second flat surface, respectively. The second partial region S2 and the third partial region S3 constitute the second region R2.

[0148] Except for using this display 10, when observed under similar conditions as those shown in FIG. 28, the display 10 displays an image as described below.

[0149] The observation direction of the observer OP2 is approximately parallel to the second partial region S2 and the third partial region S3. Here, the fourth partial region S4 and the first partial region S1 are the first light scattering surface and the second light scattering surface, respectively. Therefore, under this observation condition, the second partial region S2 and the third partial region S3 hardly contribute to the display, and the first portion A1 behaves as if the entire portion were a light scattering layer. Therefore, the observer OP2 sees a white image as described with reference to FIG. 29.

[0150] The observation direction of the observer OP1 is oblique to the second partial region S2. In this case, the first portion A1 functions as a filter in which the region corresponding to the second partial region S2 has a higher transmittance than the other regions. As a result, the moiré effect makes it possible or easy for the observer OP1 to distinguish the latent image.

[0151] The observation direction of the observer OP3 is oblique to the third partial region S3. In this case, the first portion A1 functions as a filter in which the region corresponding to the third partial region S3 has a higher transmittance than the other regions. As a result, the moiré effect makes it possible or easy for the observer OP3 to distinguish the latent image.

[0152] <Ninth embodiment> FIG. 35 is a cross-sectional view that illustrates an example of a structure that can be adopted for the first portion in a display according to a ninth embodiment of the present invention.

[0153] The display 10 shown in FIG. 35 is similar to the display 10 described in the fifth embodiment, except for the following points.

[0154] That is, in the first portion A1 of Fig. 35, each of the protrusions PR is a rectangular prism with one side parallel to the first direction and the second direction and a height direction parallel to the first direction. Here, the cross section perpendicular to the height direction of each rectangular prism is a trapezoid whose upper base corresponds to the top surface of the protrusion PR and whose lower base corresponds to the bottom surface of the protrusion PR. The two side surfaces of each rectangular prism corresponding to the legs of the trapezoid, i.e., the two side surfaces of the protrusion PR, are the second partial region S2 and the third partial region S3. Moreover, the side surface of each rectangular prism corresponding to the upper base of the trapezoid, i.e., the top surface of the protrusion PR, is the fourth partial region S4.

[0155] The combination of the second partial region S2 and the fourth partial region S4 is a first light scattering surface, and the first partial region S1 is a second light scattering surface. Specifically, the first partial region S1, the second partial region S2, and the fourth partial region S4 have randomly arranged concave or convex portions. The first partial region S1, the second partial region S2, and the fourth partial region S4 constitute a first region R1. The third partial region S3 is a first flat surface. The third partial region S3 constitutes a second region R2.

[0156] Except for using this display 10, when observed under similar conditions as those shown in FIG. 28, the display 10 displays an image as described below.

[0157] In the viewing direction of the viewer OP1, the third partial region S3 hardly contributes to the display, and the first portion A1 behaves as if the entire portion were a light scattering layer, so that the viewer OP3 sees a white image as described with reference to FIG.

[0158] In the viewing direction of the observer OP2, the third partial region S3 may only slightly contribute to the display. In this viewing condition, the first part A1 therefore acts as a filter in which the second region R2 corresponding to the third partial region S3 has a higher transmittance than the first region R1 corresponding to the first partial region S1, the second partial region S2 and the fourth partial region S4. As a result, a moiré effect makes it possible or easier for the observer OP2 to distinguish the latent image.

[0159] The angle that the viewing direction of the viewer OP3 makes with respect to the third partial region S3 is larger than the angle that the viewing direction of the viewer OP2 makes with respect to the third partial region S3. Increasing this angle increases the contribution of the third partial region S3 to the display, and therefore the visible image is displayed more clearly.

[0160] Tenth embodiment Fig. 36 is a plan view that shows a schematic diagram of a display according to a tenth embodiment of the present invention. Note that Fig. 36 shows a booklet in an open state.

[0161] The display medium 10 shown in Fig. 36 is a booklet. Here, the display medium 10 is a passport. The display medium 10 may be another article, for example, a bankbook such as a deposit passbook.

[0162] The display body 10 includes one or more sheets 10A and a cover 10B. Here, as an example, it is assumed that the number of sheets 10A included in the display body 10 is two or more.

[0163] The sheets 10A are stacked on top of each other. Each of the sheets 10A has a generally rectangular shape. More specifically, the shape of each of the sheets 10A is a rectangle with rounded corners. The stack of sheets 10A is folded in half at the midpoint between a pair of short sides. Each of the two portions of the sheet 10A separated by the fold line is a page portion in which one page is assigned to one side and another page is assigned to the other side.

[0164] Cover 10B is folded in half. Cover 10B and the stack of sheets 10A are overlapped such that their folds match and the stack of sheets 10A is sandwiched between cover 10B when display body 10 is closed. Cover 10B and the stack of sheets 10A are integrated by binding or the like at the folds.

[0165] One of the sheets 10A includes the first portion A1 in one of the page portions. Among the sheets 10A, the sheet 10A including a page portion that contacts the page portion including the first portion A1 when the display body 10 is closed includes the second portion A2 in that page portion. That is, the first portion A1 is included in one of a pair of adjacent page portions when the display body 10 is closed, and the second portion A2 is included in the other of the page portions. The first portion A1 and the second portion A2 are arranged so as to overlap with each other when the display body 10 is closed. The first portion A1 and the second portion A2 have the same structures as the first portion A1 and the second portion A2 of the display body 10 according to the first to ninth embodiments, respectively.

[0166] The first portion A1 and the second portion A2 may be provided on one and the other of a pair of adjacent sheets 10A, respectively. Alternatively, the first portion A1 and the second portion A2 may be provided on the same sheet 10A. Alternatively, the second portion A2 may be provided on the back surface of the cover 10B, and the first portion A1 may be provided on the sheet 10A adjacent to the second portion A2 when the display body 10 is closed. Here, as an example, it is assumed that the first portion A1 and the second portion A2 are provided on one and the other of a pair of adjacent sheets 10A, respectively.

[0167] The page portion on which the second portion A2 is provided further includes a third portion A3 and a fourth portion A4. The third portion A3 is a portion on which a face photograph is recorded. The fourth portion A4 is a portion on which information that can be optically recognized is recorded, for example, by printing. The page on which the third portion A3 and the fourth portion A4 are provided is a so-called data page.

[0168] The third portion A3 and the fourth portion A4 may be provided in another page portion. For example, the third portion A3 and the fourth portion A4 may be provided in the page portion where the first portion A1 is provided. The third portion A3 and the fourth portion A4 are preferably provided in a page portion adjacent to the cover 10B when the display body 10 is closed.

[0169] When the sheet 10A on which the first portion A1 is provided includes a polymer sheet as a substrate, the polymer sheet can be used as the carrier 11. Alternatively, when the sheet 10A on which the first portion A1 is provided includes a piece of paper as a substrate, a window can be provided in the piece of paper, and the first portion A1 can be placed at the position of the window.

[0170] Similarly, when the sheet 10A on which the second portion A2 is provided includes a polymer sheet as a substrate, the polymer sheet can be used as the carrier 11. Alternatively, when the sheet 10A on which the second portion A2 is provided includes a piece of paper as a substrate, a window can be provided in the piece of paper, and the second portion A2 can be placed at the position of the window.

[0171] In the sheet 10A that does not have either the first portion A1 or the second portion A2, either a polymer sheet or a piece of paper may be used as the substrate. However, in the sheet 10A that includes a data page, it is preferable to use a polymer sheet as the substrate.

[0172] Any of the sheets 10A may incorporate an IC (integrated circuit) chip on which personal information is recorded, an antenna that enables contactless communication between the IC chip and an external device, etc. When an IC chip or an antenna is provided on the page portion on which the first portion A1 is provided, they are provided on a portion other than the first portion A1. When an IC chip or an antenna is provided on the page portion on which the second portion A2 is provided, they are provided on a portion other than the second portion A2.

[0173] This display body 10 can be transformed between a first state in which the first portion A1 and the second portion A2 are separated from each other and a second state in which the first portion A1 and the second portion A2 are overlapped by turning a page. In addition, in this display body 10, the second portion A2 can be observed without passing through the first portion A1 in the first state, and the second portion A2 can be observed through the first portion A1 in the second state. Therefore, this display body 10 can make a latent image visible by a simple action such as turning a page.

[0174] In this display 10, it is preferable that the latent image is visualized to display the individual information. The individual information is information that enables the display 10 to be distinguished from one or more other display bodies. In one example, the individual information is personal information such as date of birth and name. In another example, the individual information is issuing information such as date of issue, issue number, and expiration date. In yet another example, the individual information is a combination of personal information and issuing information. By visualizing the latent image to display the individual information, counterfeiting and alteration are more deterrent.

[0175] <Modification> The above-described embodiment can be modified in various ways. For example, in the third and fourth embodiments, the first period P1 is twice the dimension of the cell C in the arrangement direction of the sub-regions. The first period P1 may deviate from twice the dimension of the cell C in the arrangement direction of the sub-regions. In this case, the difference between twice the dimension of the cell C in the X direction and the first period P1 is, for example, within a range of ±25% of twice the dimension of the cell C in the X direction.

[0176] When the first period P1 is shifted from twice the dimension of the cell C in the X direction, the color of the visible image changes in the arrangement direction of the sub-regions or in the X direction at each position of the first display portion DP1 and the second display portion DP2. For example, the color of the visible image appears rainbow-colored at each position of the first display portion DP1 and the second display portion DP2.

[0177] In this case, the arrangement order of the sub-regions SR1a to SR1c and the arrangement order of the sub-regions SR2a to SR2c may be reversed. In this way, the order of color change of the visible image at the position of the first display portion DP1 is reversed from the order of color change of the visible image at the position of the second display portion DP2. Therefore, the visible image becomes easier to distinguish.

[0178] The structures described for the first portion A1 of the display body 10 in the fifth to ninth embodiments may be used for the first portion A1 of the display body 10 in the first to fourth embodiments. Moreover, the structures described for the second portion A2 of the display body 10 in the fifth to ninth embodiments may be used for the second portion A2 of the display body 10 in the first to fourth embodiments. Such combinations may be used for the first portion A1 and the second portion A2 of the display body 10 in the tenth embodiment.

[0179] The embodiments of the present invention are a group of embodiments based on a single unique invention. Also, the aspects of the present invention are a group of aspects based on a single invention. Therefore, the features of the present invention can be combined, not limited to the above combinations. Therefore, the features, configurations, aspects, and embodiments of the present invention can be combined, and such combinations can exhibit cooperative functions and produce synergistic effects.

[0180] Although the best mode for carrying out the present invention has been described above with reference to the attached drawings, the scope of the disclosure of the present invention is not limited to the illustrated or described embodiments, but may include all embodiments that have equivalent effects to those intended by the present invention. Furthermore, the scope of the disclosure is not limited to the features of the invention defined by the claims, but may include all of the disclosed individual features and any combination of those features. EXAMPLES

[0181] <Manufacture of display bodies> The display 10 described in the third embodiment was manufactured as follows. First, a transparent film (product name: OHP film (for color LBP & color PPC), sold by: KOKUYO Co., Ltd., material: R-PET film, thickness: 0.10 mm) was prepared as the carrier 11. A printed layer 12 was formed on this carrier 11 using a laser printer (OKI Data Corporation MICROLINE (registered trademark) VINCH C931dn). In this manner, the second portion A2 was formed.

[0182] The following structure was adopted for the printed layer 12. That is, the parts of the printed layer 12 corresponding to the sub-regions SR1a and SR2a were cyan, the parts corresponding to the sub-regions SR1b and SR2b were magenta, and the parts corresponding to the sub-regions SR1c and SR2c were yellow. Each of the parts of the printed layer 12 arranged corresponding to the cells C was formed so that the dimension in the X direction was 85 μm. The arrangement pitch of these parts in the X direction was 130 μm. The arrangement pitch of the sub-regions SR1a to SR1c and the arrangement pitch of the sub-regions SR2a to SR2c were 380 μm.

[0183] Next, a mother plate was produced by the method described with reference to Figs. 4 and 5. Here, the mask layer 32 was formed by gravure offset printing. The mask layer 32 was formed in a line-like pattern in which parallel linear parts were arranged in the width direction. The pitch of the linear parts was 400 µm, and the width was 200 µm. The mold base material 31 provided with the mask layer 32 was subjected to a sandblasting treatment to form an uneven structure in the part of the mold base material 31 that was not covered by the mask layer 32. The mask layer 32 was removed by wiping it off with a rag soaked in a solvent.

[0184] The mother plate thus produced was fitted into a cylinder to obtain the embossed cylinder 20 shown in Fig. 3. Using this embossed cylinder 20, the carrier 11 was thermally embossed to form the first portion A1.

[0185] In this manner, the display 10 was manufactured. Here, the shape of the display 10 was a rectangle as shown in Fig. 1. The first portion A1 and the second portion A2 were formed so as to be symmetrical with respect to the straight line L.

[0186] When the second portion A2 was observed with the naked eye in the unfolded state of the display 10, that is, without the first portion A1, the first display portion DP1 and the second display portion DP2 could not be distinguished from each other. Next, the display 10 was folded in half along the straight line L, and the second portion A2 was observed with the naked eye through the first portion A1. As a result, the first display portion DP1 and the second display portion DP2 appeared to be different colors, and the latent image was visualized.

[0187] The objects identified by the terms "part", "display section", "element", "region", "layer", "substrate", "pixel", "surface", "display body", "carrier", "article", and "printing layer" used in this disclosure are physical entities. A physical entity can refer to a material form or a spatial form surrounded by a material. A physical entity can be characterized by its material, physical properties, physical quantity, psychophysical quantity, arrangement, shape, outline, size, width, arrangement period, statistics, recorded information, recorded data, recorded code, readable information, readable data, readable code, ability, performance, appearance, color, spectrum, image formed / displayed, processing method, detection method, verification method, and judgment method. In addition, a physical entity can have a specific function due to the characteristics of the physical entity. A set of physical entities having a specific function can exhibit a synergistic effect due to the functions of the physical entities.

[0188] When interpreting terms, configurations, features, aspects, and embodiments, reference should be made to the drawings as necessary. Matters that can be directly and unambiguously derived from the drawings should be the basis for amendment in the same manner as the text.

[0189] The terms used in this disclosure, and particularly in the claims, are generally intended as "open" terms (e.g., the term "having" should be interpreted as "having at least," the term "including" should be interpreted as "including but not limited to," etc.). Furthermore, if a specific number is not explicitly recited in a claim, no specific number is intended. For example, to aid in understanding, the claims may include the use of the introductory phrases "at least one" and "one or more" to introduce the enumeration of claims. However, the use of such phrases should not be construed to mean that a particular claim, including a claim introducing a recitation with the indefinite article "a" or "an," is limited solely to embodiments including only one of such recitations. The phrases "one or more" or "at least one" should be construed to mean "one or more." [Explanation of symbols]

[0190] 10...display body, 11...carrier, 12...printing layer, 20...embossed cylinder, 21...metal substrate, 31...mold substrate, 32...mask layer, A1...first portion, A2...second portion, A3...third portion, A4...fourth portion, BR...band-shaped region, C...cell, DP1...first display portion, DP2...second display portion, OP1...observer, OP2...observer, OP3...observer, P1...first period, P2...second period , R1...first region, R2...second region, S1...first subregion, S2...second subregion, S3...third subregion, S4...fourth subregion, SR1...subregion, SR1a...subregion, SR1b...subregion, SR1c...subregion, SR2...subregion, SR2a...subregion, SR2b...subregion, SR2c...subregion, SR3...subregion, SR4...subregion, W1...width, W2...width.

Claims

1. A device comprising first and second parts, the device being deformable between a first state in which the first and second parts are spaced apart from each other and a second state in which the first and second parts overlap; the first portion includes first and second regions each having a shape extending in a first direction and alternately and regularly arranged in a second direction intersecting the first direction, each of the first regions being a light-transmitting region provided with a light deflection structure having light deflection properties, and each of the second regions being a transparent region having a flat front surface and a flat back surface; a latent image is recorded in the second portion, the latent image being impossible or difficult to distinguish when observed without passing through the first portion in the first state, and being possible or easy to distinguish when observed through the first portion in the second state; The light deflection structure is a display including a lenticular.

2. A device comprising first and second portions, the device being deformable between a first state in which the first and second portions are spaced apart from each other and a second state in which the first and second portions overlap; the first portion includes first and second regions each having a shape extending in a first direction and alternately and regularly arranged in a second direction intersecting the first direction, each of the first regions being a light-transmitting region provided with a light deflection structure having light deflection properties, and each of the second regions being a transparent region having a flat front surface and a flat back surface; a latent image is recorded in the second portion, the latent image being impossible or difficult to distinguish when observed without passing through the first portion in the first state, and being possible or easy to distinguish when observed through the first portion in the second state; The light deflection structure is a display including a plurality of randomly arranged concave or convex portions.

3. 3. The display according to claim 1, wherein the front surface and the rear surface are parallel to each other.

4. A device comprising first and second portions, the device being deformable between a first state in which the first and second portions are spaced apart from each other and a second state in which the first and second portions overlap; the first portion includes first and second regions each having a shape extending in a first direction and alternately and regularly arranged in a second direction intersecting the first direction, each of the first regions being a light-transmitting region provided with a light deflection structure having light deflection properties, and each of the second regions being a transparent region having a flat front surface and a flat back surface; a latent image is recorded in the second portion, the latent image being impossible or difficult to distinguish when observed without passing through the first portion in the first state, and being possible or easy to distinguish when observed through the first portion in the second state; the first portion has a flat first main surface and a second main surface that is the back surface of the flat first main surface, and the second main surface is provided with a plurality of protrusions that each have a shape extending in the first direction and are regularly arranged in the second direction; a surface of each of the plurality of protrusions has a shape extending in the first direction and includes a first light scattering surface and a first flat surface arranged in the second direction, the first flat surface and the first light scattering surface having different orientations from each other; A display device, wherein a region of the first portion corresponding to the first light scattering surface is at least a part of the first region, and a region of the first portion corresponding to the first flat surface is at least a part of the second region.

5. the first and second portions being deformable between a first state in which the first and second portions are spaced apart from one another and a second state in which the first and second portions overlap; the first portion is made of a transparent material and has a flat first main surface and a second main surface which is the back surface of the first main surface, the second main surface is provided with a plurality of protrusions each having a shape extending in a first direction parallel to the second main surface and regularly arranged in a second direction which is parallel to the second main surface and intersects with the first direction, a surface of each of the plurality of protrusions each having a shape extending in the first direction includes a first light scattering surface and a first flat surface which are arranged in the second direction, the first flat surface and the first light scattering surface have mutually different orientations, A display body having a latent image recorded in the second portion that is impossible or difficult to identify when observed without using the first portion in the first state, and that is easily or possible to identify when observed through the first portion in the second state.

6. 6. The display according to claim 4, wherein an angle that the first flat surface makes with respect to a plane parallel to the first direction and the second direction is equal to an angle that the first light-scattering surface makes with the plane.

7. 6. The display according to claim 4, wherein an angle that the first flat surface makes with a plane parallel to the first direction and the second direction is different from an angle that the first light scattering surface makes with the plane.

8. A display device as described in any one of claims 4 to 7, wherein each of the multiple protrusions is a triangular prism having one side parallel to the first direction and the second direction and a height direction parallel to the first direction, the first flat surface being the other side of the triangular prism, and the first light-scattering surface being the remaining side of the triangular prism.

9. A display as described in any one of claims 4 to 7, wherein each of the multiple protrusions is a rectangular prism having one side parallel to the first direction and the second direction and a height direction parallel to the first direction, the first flat surface being the other side of the rectangular prism, and the first light scattering surface being yet another side of the rectangular prism.

10. The display body according to any one of claims 4 to 9, wherein each two of the plurality of adjacent protrusions are spaced apart from each other, and the second main surface has a second flat surface between each two of the plurality of adjacent protrusions.

11. The display according to any one of claims 4 to 9, wherein each two of the plurality of adjacent protrusions are spaced apart from each other, and the second main surface has a second light scattering surface between each two of the plurality of adjacent protrusions.

12. 12. The display of claim 1, further comprising a polymeric carrier.

13. A device comprising first and second portions, the device being deformable between a first state in which the first and second portions are spaced apart from each other and a second state in which the first and second portions overlap; the first portion includes first and second regions each having a shape extending in a first direction and alternately and regularly arranged in a second direction intersecting the first direction, each of the first regions being a light-transmitting region provided with a light deflection structure having light deflection properties, and each of the second regions being a transparent region having a flat front surface and a flat back surface; a latent image is recorded in the second portion, the latent image being impossible or difficult to distinguish when observed without passing through the first portion in the first state, and being possible or easy to distinguish when observed through the first portion in the second state; The second portion is composed of a plurality of strip-shaped regions regularly arranged in the width direction, and the latent image is recorded in the plurality of strip-shaped regions.

14. 14. The display of claim 13, wherein the second portion includes first and second display sections adjacent to each other, one or more of the plurality of strip-shaped regions each includes first to fourth sub-regions, in each of the one or more of the plurality of strip-shaped regions, each of the first and second sub-regions displays a first color, and each of the third and fourth sub-regions displays a second color different from the first color, the first and third sub-regions are arranged in the width direction in the first display section, the second and fourth sub-regions are arranged in the width direction in the second display section, and the first and second sub-regions are positioned differently in the width direction.

15. 14. The display of claim 13, wherein the second portion includes first and second display portions adjacent to each other, one or more of the plurality of strip-shaped regions each include first to sixth sub-regions, and in each of the one or more of the plurality of strip-shaped regions, each of the first and second sub-regions displays a first color, each of the third and fourth sub-regions displays a second color different from the first color, and each of the fifth and sixth sub-regions displays a third color different from the first and second colors, the first, third and fifth sub-regions are arranged in the width direction in the first display portion, and the second, fourth and sixth sub-regions are arranged in the width direction in the second display portion, the first and second sub-regions have different positions in the width direction, the third and fourth sub-regions have different positions in the width direction, and the fifth and sixth sub-regions have different positions in the width direction.

16. The display device according to claim 15 , wherein in each of the one or more of the plurality of strip-shaped regions, the first, third and fifth sub-regions are positioned differently in the width direction than the second, fourth and sixth sub-regions.

17. The display device described in claim 15, wherein in each of the one or more of the plurality of strip-shaped regions, the first and fourth sub-regions are positioned equally in the width direction, the second and fifth sub-regions are positioned equally in the width direction, and the third and sixth sub-regions are positioned equally in the width direction.

18. The display body according to claim 14 , wherein the display body has a rectangular shape, and the second direction and the width direction are both parallel to or perpendicular to a long side of the display body.

19. The display body according to claim 14 , wherein the display body has a rectangular shape, and the second direction and the width direction are both inclined with respect to a long side of the display body.

20. The display body according to any one of claims 1 to 19, wherein the display body is in the form of a sheet or film, the first state being a state in which the display body is unfolded, and the second state being a state in which the display body is folded or bent.

21. The display body according to claim 20, wherein the display body has a rectangular shape, and the first and second portions are arranged so as to be in the second state when the display body is folded or bent so that an edge along one short side overlaps an edge along the other short side.

22. The display body according to any one of claims 1 to 19, wherein the display body is in the form of a booklet.

23. 23. The display according to claim 1, wherein the latent image is recorded as a print in the second portion.

24. A display method comprising: setting the display according to claim 1 in the second state.

Images