JP7581914B2 - Display body - Google Patents

Description

The present invention relates to a display.

With the recent improvements in the performance of color copiers, it has become easier to counterfeit securities such as stocks and bonds, as well as various certificates. For this reason, copy-protection media that make it possible to distinguish originals from copies are sometimes used for these items.

Anti-copy media is a recording medium to which anti-counterfeiting technology is applied to prevent or deter counterfeiting using color copiers and the like. An example of an anti-copy media is one in which copies made using a color copier display certain patterns, such as letters or pictures, that are not found on the original.

One of the anti-counterfeiting technologies is the so-called "watermark technology," which creates a distribution of fiber density and thickness on paper, and when transmitted light is observed, a pattern corresponding to this distribution is visible. This watermark technology is capable of determining authenticity in any environment as long as there is a certain amount of light. In addition, it is extremely well-known, and so, despite being an ancient technology, it is still used on banknotes and other items around the world.

However, the structure described above for this watermark technology needs to be formed during the paper manufacturing stage. Therefore, the above watermark technology cannot be easily used by anyone other than paper manufacturers. In addition, paper that employs the above watermark technology has high manufacturing costs.

In light of these problems, technology is sometimes used that allows for the visual effects achieved by the above watermarking techniques to be reproduced in a simulated manner.

For example, there is a counterfeit prevention technology that prints a penetrating transparent ink onto paper, making the transmittance of the area where the transparent ink is printed higher than the transmittance of the area where the transparent ink is not printed, thereby making it possible to see a pattern corresponding to the area where the transparent ink is printed when the transmitted light is observed with the naked eye (see Patent Document 1).

Another technique that can simulate the visual effect achieved by the above watermarking technique is a counterfeiting prevention technique that prints light-blocking ink of the same color as the paper on the paper, making the transmittance of the areas where the light-blocking ink is printed lower than the transmittance of areas where the light-blocking ink is not printed, thereby making it possible to see a pattern corresponding to the areas where the light-blocking ink is printed when the transmitted light is observed with the naked eye (see Patent Document 2).

The above-mentioned anti-counterfeiting technologies make the pattern corresponding to the area printed with transparent ink or light-blocking ink invisible or difficult to see when observed with the naked eye in reflected light, and visible or easily visible when observed with the naked eye in transmitted light. In contrast to this, there is also an anti-counterfeiting technology in which a printed pattern of a different color from the paper is formed to include first and second areas, with the first area having the same hue as the second area and higher brightness and lower transmittance than the second area, making the first and second areas distinguishable or easily from each other when observed with the naked eye in reflected light, and making the first and second areas difficult or impossible to distinguish from each other when observed with the naked eye in transmitted light (see Patent Document 3).

Japanese Patent Application Publication No. 6-228900 JP 2001-26177 A JP 2015-96308 A

The present invention aims to provide a technology that makes it possible to distinguish between an original and a copy by observing with the naked eye or under low magnification.

According to one aspect of the present invention, there is provided a display comprising: a light-transmitting substrate having a first main surface and a second main surface which is the back surface of the first main surface; a first colored layer including first colored portions and first uncolored portions arranged alternately on the first main surface, wherein the first colored portions transmit first colored light when illuminated with white light and the first uncolored portions transmit the white light without coloring it when illuminated with white light, and a distance between adjacent first uncolored portions in an arrangement direction of the first colored portions and the first uncolored portions is within a range of 5 μm to 20 μm; and a second colored layer including second colored portions and second uncolored portions arranged alternately on the second main surface corresponding to the first colored portions and the first uncolored portions, wherein the second colored portions transmit second colored light having a color different from the first colored light when illuminated with white light and the second uncolored portions transmit the white light without coloring it when illuminated with white light, and a distance between adjacent second uncolored portions in the arrangement direction is within a range of 5 μm to 20 μm.

When copying with a color copier, first the scanner unit reads the image displayed on the original. Specifically, the scanner unit reads the image by placing a diffuse reflector on the back of the original, illuminating the front of the original with white light, and receiving the reflected light. The scanner unit outputs scan data equivalent to the data of the read image to the processing unit. The processing unit generates print data from this scan data and outputs it to the printer unit. The printer unit prints on the substrate based on the print data.

In the above display, the second colored portions and the second non-colored portions are arranged alternately in correspondence with the first colored portions and the first non-colored portions. That is, the arrangement direction of the second colored portions and the second non-colored portions is the same as the arrangement direction of the first colored portions and the first non-colored portions. The second colored portions and the second non-colored portions are arranged, for example, so as to face the first non-colored portions and the first colored portions, respectively. In addition, the distance between the first non-colored portions and the distance between the second non-colored portions are short.

Therefore, in the above-mentioned transmission image, if the distance between the first and second colored portions that appear to be adjacent is sufficiently short, the scanner unit may read the combination of the first and second colored portions as a single colored portion having a color resulting from subtractive mixing of the color of the first colored light and the color of the second colored light. In this case, the image reproduced from the scan data output by the scanner unit does not match the transmission image displayed by the original. Therefore, the transmission image displayed by the copy obtained by printing based on the print data generated from this scan data also does not match the transmission image displayed by the original.

In addition, in many color copiers, the printer unit does not have a printing resolution sufficient to reproduce the first and second colored portions as separate objects when the distance between them is sufficiently short. Therefore, even if the scanner unit has a high optical resolution or reading resolution and can read the first and second colored portions as separate objects, the processing unit generates print data with a lower resolution than the scan data, and the transmission image displayed by the copy obtained by printing based on this print data does not match the transmission image displayed by the original.

Even if the image displayed by the display is captured with a digital camera or microscope and the captured image data obtained is used for printing, for the same reasons as above, the transmitted image displayed by the copy will not match the transmitted image displayed by the original.

As described above, the transmitted image displayed by the above display does not match the transmitted image displayed by its copy. The difference between these images can be confirmed by observing them with the naked eye or by observing them enlarged at a low magnification. In other words, if the above display is the original, this original and its copy can be distinguished by observing them with the naked eye or by observing them enlarged at a low magnification.

Note that, here, "observation at low magnification" means observation at a magnification of 5 to 30 times. In other words, being able to distinguish between the original and the copy by observation at low magnification means that they can be distinguished by observation with a simple magnifying glass such as a loupe.

It is preferable that the distance between the first non-colored portions is in the range of 5 μm to 20 μm. It is also preferable that the distance between the second non-colored portions is in the range of 5 μm to 20 μm.

The distance between the first non-colored portions and the distance between the second non-colored portions may be equal or different. The first non-colored portions may be arranged regularly or irregularly. Similarly, the second non-colored portions may be arranged regularly or irregularly.

According to another aspect of the present invention, there is provided a display according to the above aspect, in which the distance between adjacent first colored portions in the arrangement direction is within a range of 5 μm to 50 μm, and the distance between adjacent second colored portions in the arrangement direction is within a range of 5 μm to 50 μm.

It is preferable that the distance between the first colored portions is in the range of 5 μm to 20 μm. It is also preferable that the distance between the second colored portions is in the range of 5 μm to 20 μm.

It is easy to confirm with the naked eye that the transmitted image displayed by a display using this configuration is different from the transmitted image displayed by its copy.

According to yet another aspect of the present invention, a display device is provided in which the second colored portion and the second non-colored portion are related to any of the above-mentioned sides facing the first non-colored portion and the first colored portion, respectively.

When this configuration is adopted, in a transmitted image obtained when the surface on the first main surface side of the display body, i.e., the front surface, is imaged from a vertical direction, at least a part of the second colored portion is visible at the position of the first non-colored portion. Also, in a transmitted image obtained when the surface on the second main surface side of the display body, i.e., the back surface, is imaged from a vertical direction, at least a part of the first colored portion is visible at the position of the second non-colored portion. Therefore, when the front or back surface of the display body is imaged from a vertical direction, the above-mentioned effect can be obtained more reliably.

According to yet another aspect of the present invention, there is provided a display according to the above aspect, in which the distance between a pair of the first colored portions adjacent to each other in the arrangement direction with one of the first non-colored portions sandwiched therebetween is smaller than the distance between a pair of the second non-colored portions adjacent to each other in the arrangement direction with the second colored portion facing the first non-colored portion sandwiched therebetween, and the distance between a pair of the second colored portions adjacent to each other in the arrangement direction with one of the second non-colored portions sandwiched therebetween is smaller than the distance between a pair of the first non-colored portions adjacent to each other in the arrangement direction with the first colored portion facing the second non-colored portion sandwiched therebetween.

When this configuration is adopted, the above-mentioned effect can be obtained more reliably when the front or back of the display is imaged from a vertical direction. Also, when this configuration is adopted, the above-mentioned effect can be easily obtained even when the front or back of the display is imaged from an oblique direction.

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 colored portions and the first non-colored portions each have a linear shape and are arranged alternately in the width direction, and the second colored portions and the second non-colored portions each have a linear shape and are arranged alternately in the width direction.

In this display, the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion may each have a linear shape. Alternatively, the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion may each include a portion having a curved shape. Alternatively, the first colored portion may form a nested arrangement pattern, and the second colored portion may form a nested arrangement pattern corresponding to the first colored portion.

In these cases, the line width of each of the first and second colored portions, i.e., the distance between adjacent first non-colored portions and the distance between adjacent second non-colored portions, may be constant or may vary along the length of the line. Also, adjacent first colored portions may have the same line width or may have different line widths.

The distance between the first colored portions, i.e., the width of the first non-colored portion, may be constant or may vary along the length of the line. The distance between the first colored portions may be equal or different in the arrangement direction of the first and second colored portions.

Similarly, the distance between the second colored portions, i.e., the width of the second non-colored portions, may be constant or may vary along the length of the line. The distance between the second colored portions may be equal or different in the arrangement direction of the first and second colored portions.

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 colored portions and the first non-colored portions are arranged in a checkerboard pattern, and the second colored portions and the second non-colored portions are arranged in a checkerboard pattern.

The light-transmitting substrate is transparent to visible light. The light-transmitting substrate is preferably a colorless, transparent or colorless, semi-transparent thin layer. For example, when illuminated with white light, the light-transmitting substrate transmits the incident light without coloring it.

The light-transmitting substrate can be a polymer film or sheet, paper, or a combination thereof.

As the polymer film or polymer sheet, a film or sheet made of a resin with high light transmittance, such as polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene (PE), or triacetyl cellulose (TAC), is suitable. An appropriate light-transmitting substrate is selected depending on the application of the display.

When the light-transmitting substrate is a polymer film, the total light transmittance is preferably 87% or more and 93% or less. There is no upper limit to the total light transmittance, but considering the refractive index of the polymer film, it is difficult to produce a polymer film with a total light transmittance higher than 93%. Here, "total light transmittance" is a value obtained by the method specified in JIS K7375:2008 "Plastics - Determination of total light transmittance and total light reflectance".

When the light-transmitting substrate is a polymer film, the haze is preferably 4% or less. There is no lower limit for the haze, but it is usually 0.1% or more. Here, "haze" is a value obtained by the method specified in JIS K7136:2000 "Determination of haze for plastics - transparent materials."

The paper is preferably watermarked paper. However, in Japan, watermarked paper manufactured by private companies is limited to only that which displays a two-tone transparent image, known as the white watermark method. In Japan, watermarked paper using the black watermark method, which displays a three-tone or higher transparent image, is used only for banknotes. When using watermarked paper manufactured by private companies as the light-transmitting substrate, it is desirable for this paper to be thin. When using thin paper as the light-transmitting substrate, it is preferable to select this paper so that it does not become insufficient in strength or become insufficient in printability due to unevenness. Alternatively, a composite material of paper and a polymer film or sheet may be used as the light-transmitting substrate.

When the light-transmitting substrate contains paper, the opacity of the light-transmitting substrate is preferably 60% or less. Here, "opacity" is a value obtained by the method specified in JIS P8149:2000 "Paper and paperboard -- Opacity test method (paper backing) -- Diffuse illumination method."

The first colored layer is provided on the first main surface of the light-transmitting substrate. As described above, the first colored layer includes first colored portions and first non-colored portions arranged alternately on the first main surface. The first colored portions transmit the first colored light when illuminated with white light. The first non-colored portions transmit the white light without coloring it when illuminated with white light. According to one example, the first non-colored portions are spaces sandwiched between the first colored portions. According to another example, the first non-colored portions are made of a colorless transparent material that fills the gaps between the first colored portions.

The second colored layer is provided on the second main surface of the light-transmitting substrate. As described above, the second colored layer includes first colored portions and first non-colored portions arranged alternately on the second main surface. The first colored portions transmit the first colored light when illuminated with white light. The first non-colored portions transmit the white light without coloring it when illuminated with white light. According to one example, the first non-colored portions are spaces sandwiched between the first colored portions. According to another example, the first non-colored portions are made of a colorless transparent material that fills the gaps between the first colored portions.

The thickness of the first and second colored parts is preferably 0.3 μm or more. If the first and second colored parts are made thin, their adhesion to the light-transmitting substrate may be insufficient.

The first and second colored portions can be formed by printing. For example, first, one of the first and second colored portions is formed by printing on one main surface of the light-transmitting substrate. Next, proper alignment is performed, and the other of the first and second colored portions is formed by printing on the other main surface of the light-transmitting substrate. The printing method is appropriately selected from known printing methods such as screen printing, screen offset printing, gravure printing, gravure offset printing, flexographic printing, and reverse printing, depending on the dimensions and gaps of the first and second colored portions to be formed.

Each of the first and second colored portions may include a color pigment and a polymer.
As color pigments, organic pigments, inorganic pigments, or combinations thereof known in the art can be used.

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

The polymer is made of a colorless transparent resin or a colored resin. Examples of resins that can be used include thermoplastic resins or thermosetting resins such as polycarbonate resin, acrylic resin, fluorine-based acrylic resin, silicon-based acrylic resin, epoxy acrylate resin, polystyrene resin, acrylonitrile-styrene resin, cycloolefin polymer, methylstyrene resin, fluorene resin, polyethylene terephthalate (PET), polypropylene, phenolic resin, melamine resin, polyethylene naphthalate (PEN), and polyimide (PI).

As the thermoplastic resin, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS), cyclic olefin copolymer (COC), acrylic resin such as polymethyl methacrylate (PMMA), cycloolefin polymer (COP), methacrylic acid-styrene copolymer (MS), acrylonitrile-styrene copolymer (AS), polyethylene naphthalate (PEN), and polyimide (PI) can be used. As the thermosetting resin, it is possible to use thermosetting resins well known in the field, such as phenolic resin, melamine resin, epoxy resin, and alkyd.

In addition to these, engineering plastics and super engineering plastics such as polybutylene terephthalate (PBT), polyoxymethyl (POM), polyamide (PA), and polyphenylsulfide (PPS) can also be used as resins. In addition, resins that harden with ionizing radiation, such as acrylic resins, urethane resins, epoxy resins, polyester resins, and thiol resins, can also be used.

Each of the first and second colored portions may further include light scattering particles. The light scattering particles may be spherical particles or irregularly shaped particles. The material of the light scattering particles may be either organic or inorganic.

Examples of organic substances that can be used for light scattering particles include acrylic resins, polystyrene, styrene-acrylic copolymers or crosslinked products thereof, melamine-formaldehyde condensates, urethane resins, polyesters, silicone resins, fluorine particles, epoxy resins, and copolymers thereof. Examples of inorganic substances that can be used for light scattering particles include clay compounds such as smectite, kaolinite, and talc; inorganic oxides such as silica, titania, alumina, silica alumina, zirconia, zinc oxide, barium oxide, and strontium oxide; inorganic carbonates such as calcium carbonate, barium carbonate, magnesium carbonate, and strontium carbonate; inorganic chlorides such as barium chloride and strontium chloride; inorganic sulfates such as barium sulfate and strontium sulfate; inorganic nitrates such as barium nitrate and strontium nitrate; inorganic hydroxides such as barium hydroxide, aluminum hydroxide, and strontium hydroxide; and glass.

The ink used to form the first and second colored portions may further contain a solvent in addition to the above components. The solvent may be, for example, dodecane or tetradecane. Other compounds or compositions may be used as the solvent. For example, for fast-drying inks, solvents that have a low boiling point and volatilize at room temperature, such as methyl ethyl ketone (MEK), ethanol, and acetone, may be used. For water-based inks, water (purified water) may be used as the solvent. For oil-based inks, oils that do not volatilize easily at room temperature, such as aliphatic hydrocarbons, glycol ethers, and higher alcohols, may be used as the solvent.

FIG. 1 is a plan view illustrating a display according to an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view showing a part of the display unit shown in FIG. 1 . 2 is an enlarged plan view showing a part of the front surface of the display unit shown in FIG. 1 . FIG. 4 is an enlarged plan view of a portion of the front surface shown in FIG. 3 . 2 is an enlarged plan view showing a part of the rear surface of the display unit shown in FIG. 1 . FIG. 6 is an enlarged plan view showing a portion of the back surface shown in FIG. 5 . 2 is a diagram showing a schematic view of a state in which an image displayed by the display unit shown in FIG. 1 is captured; 8 is a diagram showing an image displayed on the display device shown in FIG. 1 under the conditions shown in FIG. 7 . FIG. 2 is a diagram showing an example of a state in which a reflected image displayed by the display shown in FIG. 1 is observed; FIG. 11 is a diagram showing an image displayed on the display device shown in FIG. 1 under the conditions shown in FIG. 10 . 1. FIG. 4 is a diagram illustrating another example of a state in which a reflected image displayed by the display shown in FIG. 1 is observed. 13 is a diagram showing an image displayed on the display device shown in FIG. 1 under the conditions shown in FIG. 12 . 1. FIG. 4 is a diagram showing another example of a state in which a reflected image displayed by the display shown in FIG. 1 is observed. 2 is a diagram illustrating an example of a state in which a transmission image displayed on the display unit illustrated in FIG. 1 is observed; FIG. 16 is a diagram showing an image displayed on the display device shown in FIG. 1 under the conditions shown in FIG. 15 . FIG. 11 is a plan view illustrating an example of a structure that can be adopted for a first colored layer of a display according to a first modified example. FIG. 11 is a plan view illustrating an example of a structure that can be adopted for a second colored layer of a display according to a first modified example. FIG. 11 is a plan view illustrating an example of a structure that can be adopted for a first colored layer of a display according to a second modified example. FIG. 11 is a plan view illustrating an example of a structure that can be adopted for a second colored layer of a display according to a second modified example.

The following describes an embodiment of the present invention with reference to the drawings. The embodiment described below is a more specific embodiment of one of the above aspects. Elements having the same or similar functions are given the same reference numerals, and duplicate descriptions are omitted.

Figure 1 is a plan view that shows a schematic diagram of a display according to one embodiment of the present invention. Figure 2 is a cross-sectional view showing an enlarged portion of the display shown in Figure 1. Figure 3 is a plan view showing an enlarged portion of the front surface of the display shown in Figure 1. Figure 4 is a plan view showing an enlarged portion of the front surface shown in Figure 3. Figure 5 is a plan view showing an enlarged portion of the rear surface of the display shown in Figure 1. Figure 6 is a plan view showing an enlarged portion of the rear surface shown in Figure 5. In each figure, the X direction and the Y direction are parallel to the display surface of the display 1 and are mutually orthogonal, and the Z direction is perpendicular to the X direction and the Y direction, i.e., the thickness direction of the display 1.

The display 1 shown in Figures 1 to 5 is a gift certificate. The display 1 may be a security other than a gift certificate. Alternatively, the display 1 may be a certificate such as an identity card or an identification card.

The display body 1 includes a light-transmitting substrate 11, a first colored layer 12, and a second colored layer 13 shown in FIG. 2, and a printed layer 14 shown in FIG. 1.

The light-transmitting substrate 11 is a colorless, transparent or colorless, semi-transparent thin layer that transmits visible light. Here, as an example, the light-transmitting substrate 11 is a colorless, transparent polymer film.

The light-transmitting substrate 11 has a rectangular shape with its long sides parallel to the X-direction. The light-transmitting substrate 11 may have other shapes.

The light-transmitting substrate 11 has a first main surface and a second main surface which is the back surface of the first main surface. The first main surface and the second main surface are the top and bottom surfaces of the light-transmitting substrate 11 in FIG. 2, respectively. Hereinafter, the surface on the first main surface side and the surface on the second main surface side of the display body 1 will be referred to as the front surface and the back surface, respectively.

The printing layer 14 is provided on the first main surface of the light-transmitting substrate 11. The printing layer 14 displays, for example, characters, patterns, figures, photographs, or a combination thereof.

The printed layer 14 can be further provided on the second main surface of the light-transmitting substrate 11. Alternatively, the printed layer 14 can be provided on the second main surface instead of on the first main surface of the light-transmitting substrate 11. Alternatively, the printed layer 14 can be omitted.

As shown in FIG. 1, the printing layer 14 has a window W, which is an opening. The part of the display body 1 that corresponds to the window W is an authenticity determination part that is used to determine the authenticity of the display body 1.

The first main surface has a first printed area R1A and a first non-printed area R1B shown in Figures 2 and 3 at the position of the window W. On the other hand, the second main surface has a second printed area R2A and a second non-printed area R2B shown in Figures 2 and 5 at the position of the window W.

Here, the first print area R1A is a pattern that corresponds to the character string "COPY", and the first non-print area R1B is its inverted pattern. Also, here, the second print area R2A is a pattern that corresponds to the mirror image of the character string "COPY", and the second non-print area R2B is its inverted pattern.

The first colored layer 12 is provided on the first main surface of the light-transmitting substrate 11 at the position of the window W. The first colored layer 12 is not provided on the first non-printing region R1B shown in Figures 2 and 3, but is provided on the first printing region R1A.

As shown in Figs. 2 and 4, the first colored layer 12 includes first colored portions 121 and first non-colored portions 122 arranged alternately on the first main surface. The first colored portions 121 and first non-colored portions 122 each have a linear shape and are arranged alternately in the width direction. Here, the first colored portions 121 and first non-colored portions 122 each have a shape extending in the X direction and are arranged alternately in the Y direction.

The first colored portion 121 transmits the first colored light when illuminated with white light. The first colored portion 121 is made of ink containing a color pigment and a polymer.

The dimension of the first colored portion 121 in the arrangement direction of the first colored portion 121 and the first non-colored portion 122, i.e., the width W1a of the first colored portion 121, is constant along the length direction of the first colored portion 121. In addition, adjacent first colored portions 121 have the same width W1a.

The width W1a corresponds to the distance between adjacent first non-colored portions 122 in the arrangement direction of the first colored portions 121 and the first non-colored portions 122. The width W1a is in the range of 5 μm to 20 μm.

When illuminated with white light, the first non-colored portion 122 transmits the white light without coloring it. Here, the first non-colored portion 122 is the space between adjacent first colored portions 121.

The dimension of the first non-colored portion 122 in the arrangement direction of the first colored portion 121 and the first non-colored portion 122, i.e., the width W1b of the first non-colored portion 122, is constant along the length direction of the first non-colored portion 122. In addition, adjacent first non-colored portions 122 have the same width W1b.

The width W1b corresponds to the distance between adjacent first colored portions 121 in the arrangement direction of the first colored portions 121 and the first non-colored portions 122. The width W1b is in the range of 5 μm to 50 μm. Here, the width W1b is smaller than the width W1a. The sum of the width W1a and the width W1b is the pitch P1 of the arrangement of the first colored portions 121 or the first non-colored portions 122.

The second colored layer 13 is provided on the second main surface of the light-transmitting substrate 11 at the position of the window W. The second colored layer 13 is not provided on the second non-printing region R2B shown in Figures 2 and 5, but is provided on the second printing region R2A.

As shown in Figures 2 and 6, the second colored layer 13 includes second colored portions 131 and second non-colored portions 132 arranged alternately on the second main surface. The second colored portions 131 and second non-colored portions 132 are arranged alternately on the second main surface in correspondence with the first colored portions and first non-colored portions. The second colored portions 131 and second non-colored portions 132 each have a linear shape and are arranged alternately in the width direction. Here, the second colored portions 131 and second non-colored portions 132 each have a shape extending in the X direction and are arranged alternately in the Y direction.

When illuminated with white light, the second colored portion 131 transmits second colored light that is different in color from the first colored light. The second colored portion 131 is made of ink that contains a color pigment and a polymer.

The dimension of the second colored portion 131 in the arrangement direction of the second colored portion 131 and the second non-colored portion 132, i.e., the width W2a of the second colored portion 131, is constant along the length direction of the second colored portion 131. In addition, the widths W2a of adjacent second colored portions 131 are equal to each other.

The width W2a corresponds to the distance between adjacent second non-colored portions 132 in the arrangement direction of the second colored portions 131 and the second non-colored portions 132. The width W2a is in the range of 5 μm to 20 μm. Here, the width W2a is equal to the width W1a.

When illuminated with white light, the second non-colored portion 132 transmits the white light without coloring it. Here, the second non-colored portion 132 is the space between adjacent second colored portions 131.

The dimension of the second non-colored portion 132 in the arrangement direction of the second colored portion 131 and the second non-colored portion 132, i.e., the width W2b of the second non-colored portion 132, is constant along the length direction of the second non-colored portion 132. In addition, adjacent second non-colored portions 132 have the same width W2b.

The width W2b corresponds to the distance between adjacent second colored portions 131 in the arrangement direction of the second colored portions 131 and the second non-colored portions 132. The width W2b is in the range of 5 μm to 50 μm. Here, the width W2b is smaller than the width W2a. Here, the width W2b is equal to the width W1b. The sum of the width W2a and the width W2b is the pitch P2 of the arrangement of the second colored portions 131 or the second non-colored portions 132.

As shown in FIG. 2, the second colored portion 131 faces the first non-colored portion 122. The first colored portion 121 also faces the second non-colored portion 132. In an orthogonal projection onto a plane parallel to the first principal surface, the center line of each of the second colored portions 131 coincides with the center line of the first non-colored portion 122 facing the second colored portion 131. In this orthogonal projection, the center line of each of the first colored portions 121 coincides with the center line of the second non-colored portion 132 facing the first colored portion 121.

This display 1 can be distinguished from its copy when observed at low magnification. This is explained below.

Figure 7 is a schematic diagram showing how the image displayed by the display shown in Figure 1 is captured. Figure 8 is a diagram showing the image displayed by the display shown in Figure 1 under the conditions shown in Figure 7. Figure 9 is a plan view showing an enlarged portion of the copy.

In FIG. 7, the display body 1 is placed so that its back surface faces the diffuse reflector REF, a light source LS is placed so that its front surface is illuminated from an oblique direction with illumination light IL, and an imaging device CM is placed so that it captures the reflected light RL emitted vertically by the display body 1. The illumination light IL is white light.

Under these conditions, both the first colored layer 12 and the second colored layer 13 contribute to the display. Furthermore, the width W1a of the first colored portion 121, the width W1b of the first non-colored portion 122, the width W2a of the second colored portion 131, and the width W2b of the second non-colored portion 132 are narrow. Therefore, when the resolution of the imaging device CM is low, the imaging device CM reads an image I1 that corresponds to the character string "COPY" and includes a pattern whose entire color is produced by subtractive color mixing of the color of the first colored light and the color of the second colored light, as shown in FIG. 8.

On the other hand, when the resolution of the imaging device CM is high, the imaging device CM reads an image in which a first linear portion in which the first colored portion and the second non-colored portion overlap, a second linear portion in which the first colored portion and the second colored portion overlap, a third linear portion in which the first non-colored portion and the second colored portion overlap, and a fourth linear portion in which the first colored portion and the second colored portion overlap are repeatedly arranged in this order in the width direction.

By generating print data from the image data thus read and printing based on this print data, a copy 2 shown in FIG. 9 is obtained. This copy 2 includes a light-transmitting substrate 21 and colored layers 22 and 23 formed thereon. Each of the colored layers 22 and 23 forms a pattern corresponding to the character string "COPY." The colored layers 22 and 23 are each made up of dot-shaped portions 221 and 231 that are different in color.

When the resolution of the imaging device CM is low, the resolution of the print data is also low. Therefore, the printer uniformly arranges the dot-shaped portions 221 and uniformly arranges the dot-shaped portions 231 within the area corresponding to the character string "COPY" on one main surface of the light-transmitting substrate 21.

Even if the resolution of the imaging device CM is high, the width of the first to fourth linear portions is equal to or less than the resolution of a typical printer, so the printer uniformly arranges the dot portions 221 and uniformly arranges the dot portions 231 within the area corresponding to the character string "COPY" on one main surface of the light-transmitting substrate 21 based on print data that has a lower resolution than the imaging data output by the imaging device CM.

Therefore, when the copy 2 is observed at a low magnification using a magnifying glass such as a loupe, a structure in which the dot-shaped portions 221 and 231 are uniformly arranged can be confirmed in the above-mentioned region, as shown in Figure 9.

When the display body 1 is observed at a low magnification using a magnifying glass such as a loupe, a striped pattern corresponding to the arrangement of the first colored portions 121 and the second colored portions 131 can be seen in the area where the first colored layer 12 and the second colored layer 13 are provided. In contrast, the arrangement of the dot-shaped portions 221 does not form a striped pattern, and the arrangement of the dot-shaped portions 231 does not form a striped pattern either. Therefore, due to these differences, it can be confirmed that the copy 2 is different from the display body 1 as the original.

This display 1 can be distinguished from its copy even when observed with the naked eye. This is explained below.

Figure 10 is a schematic diagram showing an example of a state in which a reflected image displayed by the display shown in Figure 1 is observed. Figure 11 is a diagram showing an image displayed by the display shown in Figure 1 under the conditions shown in Figure 10.

In FIG. 10, the light source LS and the display body 1 are positioned so that illumination light IL from the light source LS illuminates the front surface of the display body 1 from an oblique direction, and the observer OB observes the reflected light RL emitted by the display body 1. Note that the illumination light IL is white light. Also, no reflective layer is provided on the back side of the display body 1.

Under these conditions, the contribution of the second colored layer 13 to the display is smaller than the contribution of the first colored layer 12 to the display. In other words, the contribution of the first colored light to the display is larger than the contribution of the second colored light to the display. Therefore, under these conditions, the color of the area corresponding to the character string "COPY" in image I2 viewed by observer OB is closer to the color of the first colored light than to the color of the second colored light.

In contrast, when copy 2 is observed with the naked eye under the conditions of Figure 10, it displays a color in the above-mentioned region that is the result of subtractive color mixing of the color of dot-shaped portion 221 and the color of dot-shaped portion 231. The contribution of dot-shaped portion 221 to this displayed color is approximately equal to the contribution of dot-shaped portion 231. Therefore, the image displayed by copy 2 under the conditions of Figure 10 differs from image I2 displayed by display 1 under the conditions of Figure 10 in the color of the region corresponding to the character string "COPY."

Therefore, by checking these color differences, it is possible to distinguish the display body 1 and the copy 2 from each other.

Figure 12 is a schematic diagram showing another example of how the reflected image displayed by the display shown in Figure 1 is observed. Figure 13 is a diagram showing an image displayed by the display shown in Figure 1 under the conditions shown in Figure 12.

In FIG. 12, the light source LS and the display body 1 are positioned so that illumination light IL from the light source LS illuminates the back surface of the display body 1 from an oblique direction, and the observer OB observes the reflected light RL emitted by the display body 1. Note that the illumination light IL is white light. Also, no reflective layer is provided on the front side of the display body 1.

Under these conditions, the contribution of the first colored layer 12 to the display is smaller than the contribution of the second colored layer 13 to the display. In other words, the contribution of the second colored light to the display is larger than the contribution of the first colored light to the display. Therefore, under these conditions, the color of the area corresponding to the mirror image of the character string "COPY" in image I3 viewed by observer OB is closer to the color of the second colored light than to the color of the first colored light.

In contrast, when copy 2 is observed with the naked eye under the conditions of Figure 12, it displays a color in the above-mentioned region that is the result of subtractive color mixing of the color of dot-shaped portion 221 and the color of dot-shaped portion 231. The contribution of dot-shaped portion 221 to this displayed color is approximately equal to the contribution of dot-shaped portion 231. Therefore, the image displayed by copy 2 under the conditions of Figure 12 differs from image I2 displayed by display 1 under the conditions of Figure 10 in the color of the region corresponding to the mirror image of the character string "COPY."

Therefore, by checking these color differences, it is possible to distinguish the display body 1 and the copy 2 from each other.

The color displayed by display body 1 in the area corresponding to the character string "COPY" under the conditions of FIG. 10 differs from the color displayed by display body 1 in the area corresponding to the mirror image of the character string "COPY" under the conditions of FIG. 12. Such changes in display color due to changes in the observation conditions cannot be reproduced in copy 2. Therefore, display body 1 and copy 2 can be distinguished from each other by checking whether or not there is a change in display color due to changes in the observation conditions.

Figure 14 is a schematic diagram showing yet another example of how the reflected image displayed by the display shown in Figure 1 is observed.

In FIG. 14, the light source LS and the display body 1 are positioned so that illumination light IL from the light source LS illuminates the front surface of the display body 1 from an oblique direction, and the observer OB observes the reflected light RL emitted by the display body 1. Note that the illumination light IL is white light. In addition, a diffuse reflector REF is installed on the rear side of the display body 1.

When the illumination direction or observation direction is changed under these observation conditions, the balance between the magnitude of the contribution of the first colored layer 12 to the display and the magnitude of the contribution of the second colored layer 13 to the display changes. As a result, a change occurs in the color displayed by the display body 1 in the area corresponding to the character string "COPY." The copy 2 does not experience such a color change. Therefore, the display body 1 and the copy 2 can be distinguished from each other by checking whether or not there is a change in the display color associated with a change in the illumination direction or observation direction.

Figure 15 is a schematic diagram showing an example of a state in which a transmitted image displayed by the display shown in Figure 1 is observed. Figure 16 is a diagram showing an image displayed by the display shown in Figure 1 under the conditions shown in Figure 15.

In FIG. 15, the light source LS and the display body 1 are arranged so that the illumination light IL from the light source LS illuminates the back surface of the display body 1, and the observer OB observes the transmitted light TL emitted by the display body 1. Note that the illumination light IL is white light.

In image I4 displayed by display unit 1 under these viewing conditions, the color of the area corresponding to the character string "COPY" is a color resulting from subtractive color mixing of the color of first colored portion 121 and the color of second colored portion 131. Note that under these viewing conditions, the magnitude of the contribution of first colored layer 12 to the display and the magnitude of the contribution of second colored layer 13 to the display are approximately equal.

In the image displayed by the copy 2 under these observation conditions, the color of the area corresponding to the character string "COPY" is a color resulting from subtractive color mixing of the color of the dot-shaped portion 221 and the color of the dot-shaped portion 231. Furthermore, under these observation conditions, the magnitude of the contribution of the colored layer 22 to the display and the magnitude of the contribution of the colored layer 23 to the display are approximately equal.

However, as is clear from the explanation given with reference to FIG. 14, in the image read by the imaging device CM under the conditions of FIG. 7, the color of the area corresponding to the character string "COPY" is affected by the lighting direction. In the image read by the imaging device CM, the color of the area corresponding to the character string "COPY" does not necessarily match the color of the area corresponding to the character string "COPY" in the image I4 displayed by the display unit 1 under the conditions of FIG. 15.

Therefore, it is possible to distinguish display body 1 and copy 2 from each other by checking the color of the area in the transmitted image that corresponds to the character string "COPY."

In addition, the brightness of the area corresponding to the character string "COPY" in the image displayed by display 1 under the conditions of Figure 15 can change when display 1 is tilted around an axis parallel to the X direction. In contrast, the brightness of the area corresponding to the character string "COPY" in the image displayed by copy 2 under the conditions of Figure 15 does not change as much as that of display 1, even if display 1 is tilted around an axis parallel to the X direction. Therefore, by checking this change in brightness, display 1 and copy 2 can be distinguished from each other.

The display 1 can be modified in various ways.
For example, in the above-described display body 1, each of the first colored portion 121, the first non-colored portion 122, the second colored portion 131, and the second non-colored portion 132 has a linear shape, but they may include a portion having a curved shape. For example, each of the first colored portion 121, the first non-colored portion 122, the second colored portion 131, and the second non-colored portion 132 may have a waveform such as a sine wave shape. Alternatively, the first colored portion 121, the first non-colored portion 122, the second colored portion 131, and the second non-colored portion 132 may have the following shapes.

Figure 17 is a plan view that shows a schematic example of a structure that can be used for the first colored layer of the display body according to the first modified example. Figure 18 is a plan view that shows a schematic example of a structure that can be used for the second colored layer of the display body according to the first modified example.

In FIG. 17, the first colored portions 121 form a nested arrangement pattern. Specifically, the first colored portions 121 form a concentric pattern.

In FIG. 18, the second colored portion 131 forms a nested arrangement pattern corresponding to the first colored portion 121. Specifically, the second colored portion 131 forms a concentric pattern such that the second colored portion 131 and the second non-colored portion 132 face the first non-colored portion 122 and the first colored portion 121, respectively.

Any display that is similar to display 1 above, except for adopting this configuration, will also achieve the above-mentioned effects.

In the display 1 described above, the first colored portions 121 and the first non-colored portions 122 each have a linear shape and are arranged alternately in the width direction, and the second colored portions 131 and the second non-colored portions 132 each have a linear shape and are arranged alternately in the width direction. The first colored portions 121, the first non-colored portions 122, the second colored portions 131, and the second non-colored portions 132 do not have to have a linear shape.

Figure 19 is a plan view that shows a schematic example of a structure that can be used for the first colored layer of the display body according to the second modified example. Figure 20 is a plan view that shows a schematic example of a structure that can be used for the second colored layer of the display body according to the second modified example.

In FIG. 19, the first colored portion 121 and the first non-colored portion 122 are arranged in a checkered pattern. In FIG. 20, the second colored portion 131 and the second non-colored portion 132 are arranged in a checkered pattern. The second colored portion 131 and the second non-colored portion 132 face the first non-colored portion 122 and the first colored portion 121, respectively.

Any display that is similar to display 1 above, except for adopting this configuration, will also achieve the above-mentioned effects.

Specific examples of the present invention are described below.

<Manufacture of display body>
(Example 1)
The display member 1 described with reference to Figures 1 to 6 was manufactured by the following method. Note that the print layer 14 was omitted.

First, a polyethylene terephthalate film was prepared as the light-transmitting substrate 11 .
Next, the first colored layer 12 was formed on one main surface of the light-transmitting substrate 11 by gravure offset printing using a cyan process ink. In this gravure offset printing, a commercially available cyan process ink was used, a metal doctor blade was used, and a silicone rubber-based blanket was used. The intaglio plate used had a copper layer with a chrome-plated surface. The width W1a of the first colored portion 121 and the width W1b of the first non-colored portion 122 were each 10 μm.

Then, the second colored layer 13 was formed on the other main surface of the light-transmitting substrate 11 by gravure offset printing using magenta process ink. In this gravure offset printing, a commercially available magenta process ink was used, a metal doctor blade was used, and a blanket mainly made of silicone rubber was used. The intaglio plate used had a copper layer with chrome plating on the surface. The width W2a of the second colored portion 131 and the width W2b of the second non-colored portion 132 were each 10 μm. The second colored layer 13 was formed so that the center line of the second colored portion 131 and the center line of the second non-colored portion 132 coincided with the center line of the first non-colored portion 122 and the center line of the first colored portion 121, respectively, in orthogonal projection onto a plane parallel to the main surface.

(Example 2)
The display body 1 was manufactured in the same manner as in Example 1, except for the following points. That is, in this example, the width W1a of the first colored portion 121 and the width W1b of the first non-colored portion 122 were set to 10 μm and 50 μm, respectively. The width W2a of the second colored portion 131 and the width W2b of the second non-colored portion 132 were set to 10 μm and 50 μm, respectively.

(Comparative Example 1)
The display body 1 was manufactured in the same manner as in Example 1, except for the following points. That is, in this example, the width W1a of the first colored portion 121 and the width W1b of the first non-colored portion 122 were set to 100 μm and 10 μm, respectively. The width W2a of the second colored portion 131 and the width W2b of the second non-colored portion 132 were set to 100 μm and 10 μm, respectively.

(Comparative Example 2)
Except for the following points, the display body 1 was manufactured in the same manner as in Example 1. That is, in this example, the width W1a of the first colored portion 121 and the width W1b of the first non-colored portion 122 were each set to 100 μm. The width W2a of the second colored portion 131 and the width W2b of the second non-colored portion 132 were each set to 100 μm.

The dimensions used in display body 1 for Examples 1 and 2 and Comparative Examples 1 and 2 are shown in the table below.

<Production of copies>
Each of the display bodies 1 according to Examples 1 and 2 and Comparative Examples 1 and 2 was illuminated with white light, and the images displayed by the display bodies 1 were captured using a microscope. Using the data of the images thus read, copies were produced by printing on a polyethylene terephthalate film. An inkjet color printer was used for the printing.

<Evaluation 1>
For each of the display bodies 1 according to Examples 1 and 2 and Comparative Examples 1 and 2 and their copies, the transmitted images displayed when illuminated with white light were observed using a magnifying glass. The magnifying glass had a magnification of 10 times. The results are shown in the above table.

Here, a rating of "A" was given to cases where the transmitted image displayed by the original and the transmitted image displayed by the copy could be distinguished from each other when observed with a magnifying glass. A rating of "B" was given to cases where the transmitted image displayed by the original and the transmitted image displayed by the copy could not be distinguished from each other when observed with a magnifying glass.

For the display bodies 1 of Examples 1 and 2 and Comparative Examples 1 and 2, a stripe-like arrangement resulting from the arrangement of the first colored portion 121 and the second colored portion 131 could be confirmed in the transmitted images.

In contrast, the copy of display 1 in Example 1 had a structure in which dot-shaped portions 221 and 231 were uniformly arranged as described with reference to FIG. 9, and therefore the stripe-shaped arrangement could not be confirmed in the transmitted image. Due to these differences, display 1 in Example 1 and its copy could be distinguished from each other.

In the copy of display 1 of Example 2, dot-shaped portions 221 and 231 described with reference to FIG. 9 formed a striped arrangement, but there were dot-shaped portions that protruded from the linear portions that made up the stripes. In the transmitted image of this copy, dot-shaped portions that protruded from the linear portions that made up the stripes could also be confirmed. This made it possible to distinguish display 1 of Example 2 and its copy from each other.

In the copy of the display body 1 according to Comparative Example 1, the dot-shaped portions 221 and 231 described with reference to FIG. 9 form a striped arrangement, and there are no dot-shaped portions that extend beyond the linear portions that make up the stripes. Therefore, it was not possible to distinguish the display body 1 according to Comparative Example 1 and its copy from each other by checking the presence or absence of dot-shaped portions that extend beyond the linear portions that make up the stripes in the transmitted image of the copy. In order to distinguish between them, it was necessary to conduct a detailed analysis of the line widths and line spacing of the linear portions that make up the stripes in the transmitted image.

In the copy of the display body 1 according to Comparative Example 2, the dot-shaped portions 221 and 231 described with reference to FIG. 9 also form a striped arrangement, and there are no dot-shaped portions that extend beyond the linear portions that make up the stripes. Therefore, by checking the presence or absence of dot-shaped portions that extend beyond the linear portions that make up the stripes in the transmitted image of the copy, it was not possible to distinguish the display body 1 according to Comparative Example 2 from its copy. In order to distinguish between them, it was necessary to conduct a detailed analysis of the line widths and line spacing of the linear portions that make up the stripes in the transmitted image.

<Evaluation 2>
The transmitted images displayed on the display bodies 1 according to Examples 1 and 2 and Comparative Examples 1 and 2 and their copies were observed with the naked eye when illuminated with white light. The results are shown in the above table.

In addition, when the transmitted image displayed by the original and the transmitted image displayed by the copy were observed with the naked eye and could be distinguished from each other, an "A" was given as the evaluation.In addition, here, when the transmitted image displayed by the original and the transmitted image displayed by the copy were observed with the naked eye and could not be distinguished from each other, an "B" was given as the evaluation.

The transmitted image displayed by display 1 of Example 1 and the transmitted image displayed by its copy were different in color. Due to this difference in color, display 1 of Example 1 and its copy could be distinguished from each other.

In addition, the color of the transmitted image displayed by the display 1 of Example 2 and the transmitted image displayed by its copy were different. Due to this difference in color, the display 1 of Example 2 and its copy could be distinguished from each other.

In contrast, no difference in color could be perceived between the transmitted image displayed by the display 1 of Comparative Example 1 and the transmitted image displayed by its copy. Therefore, it was not possible to distinguish the display 1 of Comparative Example 1 and its copy from each other by utilizing the difference in color.

Furthermore, no difference in color could be perceived between the transmitted image displayed by the display body 1 according to Comparative Example 2 and the transmitted image displayed by its copy. Therefore, the display body 1 according to Comparative Example 2 and its copy could not be distinguished from each other by utilizing the difference in color.
The invention as originally claimed is set forth below.
[1]
a light-transmitting substrate having a first main surface and a second main surface that is an opposite surface of the first main surface;
a first colored layer including first colored portions and first uncolored portions alternately arranged on the first main surface, the first colored portions transmitting first colored light when illuminated with white light, and the first uncolored portions transmitting the white light without coloring it when illuminated with white light, and a distance between adjacent first uncolored portions in an arrangement direction of the first colored portions and the first uncolored portions is within a range of 5 μm to 20 μm;
a second colored layer including second colored portions and second uncolored portions alternately arranged on the second main surface corresponding to the first colored portions and the first uncolored portions, the second colored portions transmit second colored light having a color different from the first colored light when illuminated with white light, and the second uncolored portions transmit the white light without coloring it when illuminated with white light, and a distance between adjacent second uncolored portions in the arrangement direction is within a range of 5 μm to 20 μm;
A display body comprising:
[2]
2. The display according to item 1, wherein the distance between adjacent first colored portions in the arrangement direction is within a range of 5 μm to 50 μm, and the distance between adjacent second colored portions in the arrangement direction is within a range of 5 μm to 50 μm.
[3]
3. The display according to item 1 or 2, wherein the second colored portion and the second non-colored portion face the first non-colored portion and the first colored portion, respectively.
[4]
4. The display device according to item 3, wherein a distance between a pair of the first colored portions adjacent to each other in the arrangement direction with one of the first non-colored portions sandwiched therebetween is smaller than a distance between a pair of the second non-colored portions adjacent to each other in the arrangement direction with the second colored portion facing the first non-colored portion sandwiched therebetween, and a distance between a pair of the second colored portions adjacent to each other in the arrangement direction with one of the second non-colored portions sandwiched therebetween is smaller than a distance between a pair of the first non-colored portions adjacent to each other in the arrangement direction with the first colored portion facing the second non-colored portion sandwiched therebetween.
[5]
5. The display device according to any one of claims 1 to 4, wherein the first colored portions and the first non-colored portions each have a linear shape and are arranged alternately in the width direction, and the second colored portions and the second non-colored portions each have a linear shape and are arranged alternately in the width direction.
[6]
6. The display according to item 5, wherein each of the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion has a linear shape.
[7]
6. The display according to item 5, wherein each of the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion includes a portion having a curved shape.
[8]
6. The display according to item 5, wherein the first colored portions form a nested arrangement pattern, and the second colored portions form a nested arrangement pattern corresponding to the first colored portions.
[9]
5. The display according to any one of items 1 to 4, wherein the first colored portions and the first non-colored portions are arranged in a checkered pattern, and the second colored portions and the second non-colored portions are arranged in a checkered pattern.

REFERENCE SIGNS LIST 1... display body, 2... copy, 11... light-transmitting substrate, 12... first colored layer, 13... second colored layer, 14... print layer, 21... light-transmitting substrate, 22... colored layer, 23... colored layer, 121... first colored portion, 122... first non-colored portion, 131... second colored portion, 132... second non-colored portion, 221... dot-shaped portion, 231... dot-shaped portion, CM... imaging device, I1... image, I 2...image, I3...image, I4...image, IL...illumination light, LS...light source, OB...observer, P1...pitch, P2...pitch, R1A...first printed area, R1B...first non-printed area, R2A...second printed area, R2B...second non-printed area, REF...diffuse reflector, RL...reflected light, TL...transmitted light, W...window, W1a...width, W1b...width, W2a...width, W2b...width.

Claims (9)

a light-transmitting substrate having a first main surface and a second main surface that is an opposite surface of the first main surface;
a first colored layer including first colored portions and first uncolored portions alternately arranged on the first main surface, the first colored portions transmitting first colored light when illuminated with white light, and the first uncolored portions transmitting the white light without coloring it when illuminated with white light, and a distance between adjacent first uncolored portions in an arrangement direction of the first colored portions and the first uncolored portions is within a range of 5 μm to 20 μm;
a second colored layer including second colored portions and second uncolored portions arranged alternately on the second main surface corresponding to the first colored portions and the first uncolored portions, the second colored portions transmitting second colored light having a color different from the first colored light when illuminated with white light, and the second uncolored portions transmitting the white light without coloring it when illuminated with white light, and a distance between adjacent second uncolored portions in the arrangement direction being within a range of 5 μm to 20 μm ,
The light-transmitting substrate has the first main surface as a surface on which the first colored portion is formed, and the second main surface as a surface on which the second colored portion is formed . The display according to claim 1, wherein the distance between adjacent first colored sections in the arrangement direction is within a range of 5 μm to 50 μm, and the distance between adjacent second colored sections in the arrangement direction is within a range of 5 μm to 50 μm. The display according to claim 1 or 2, wherein the second colored portion and the second non-colored portion face the first non-colored portion and the first colored portion, respectively. a light-transmitting substrate having a first main surface and a second main surface that is an opposite surface of the first main surface;
a first colored layer including first colored portions and first uncolored portions alternately arranged on the first main surface, the first colored portions transmitting first colored light when illuminated with white light, and the first uncolored portions transmitting the white light without coloring it when illuminated with white light, and a distance between adjacent first uncolored portions in an arrangement direction of the first colored portions and the first uncolored portions is within a range of 5 μm to 20 μm;
a second colored layer including second colored portions and second uncolored portions alternately arranged on the second main surface corresponding to the first colored portions and the first uncolored portions, the second colored portions transmit second colored light having a color different from the first colored light when illuminated with white light, and the second uncolored portions transmit the white light without coloring it when illuminated with white light, and a distance between adjacent second uncolored portions in the arrangement direction is within a range of 5 μm to 20 μm;
Equipped with
the second colored portion and the second non-colored portion face the first non-colored portion and the first colored portion,
A display device in which the distance between a pair of the first colored portions adjacent to each other in the arrangement direction with one of the first non-colored portions sandwiched therebetween is smaller than the distance between a pair of the second non-colored portions adjacent to each other in the arrangement direction with the second colored portion facing the first non-colored portion sandwiched therebetween, and the distance between a pair of the second colored portions adjacent to each other in the arrangement direction with one of the second non-colored portions sandwiched therebetween is smaller than the distance between a pair of the first non-colored portions adjacent to each other in the arrangement direction with the first colored portion facing the second non- colored portion sandwiched therebetween. The display according to any one of claims 1 to 4, wherein the first colored portions and the first non-colored portions each have a linear shape and are arranged alternately in the width direction, and the second colored portions and the second non-colored portions each have a linear shape and are arranged alternately in the width direction. The display according to claim 5, wherein each of the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion has a linear shape. The display according to claim 5, wherein each of the first colored portion, the first non-colored portion, the second colored portion, and the second non-colored portion includes a portion having a curved shape. The display according to claim 5, wherein the first colored sections form a nested arrangement pattern, and the second colored sections form a nested arrangement pattern corresponding to the first colored sections. The display according to any one of claims 1 to 4, wherein the first colored portions and the first non-colored portions are arranged in a checkered pattern, and the second colored portions and the second non-colored portions are arranged in a checkered pattern.