JP2024080698A - Printed and Display Devices - Google Patents

Abstract

[Problem] To provide a printed matter having a pattern with excellent visibility and color development. [Solution] A printed matter 2 includes a first color pattern layer 10 composed of first color dots 11 and a second color pattern layer 20 composed of second color dots 21. The first color dots 11 include first color pigment chips 13. The second color dots 21 include second color pigment chips 23. The first color pigment chips 13 are first interference pigments 14a, 14b that generate first interference lights 17a, 17b, and the second color pigment chip 23 is a second interference pigment 24 that generates a second interference light 26 of a single color different from the mixed color exhibited by the first interference pigments 14a, 14b. The first interference pigments 14a, 14b and the second interference pigment 24 include a first titanium dioxide-coated mica having a particle size range of 5 μm to 25 μm and a second titanium dioxide-coated mica having a particle size range of 25 μm to 60 μm, and the first titanium dioxide-coated mica is disposed so as to fill the gaps between the second titanium dioxide-coated mica. [Selected Figure] Figure 2

Description

The present invention relates to printed matter and display devices.

Conventionally, as decorative sheets for walls, etc., printed matter has been known that includes a substrate and a printed layer provided on the substrate surface, the printed layer having a pattern such as a wood grain pattern or an abstract design. On the wall surface on which the printed matter is provided, the pattern is always visible. On the other hand, it is required that the visible pattern changes depending on whether or not a light source installed on the back side of the printed matter is used.

For example, Patent Document 1 discloses a printed matter having a light source below a print layer, in which when the light source is off, a pattern is visible due to reflected light from a print layer made of RGB interference pigments, and when the light source is on, a pattern is visible due to transmitted light from a CMY print layer (see Figure 11 of Patent Document 1). Patent Document 2 discloses a decorative sheet having two patterns using interference pigments, in which when the image on the back side is not displayed, the patterns are visible, and when the image on the back side is displayed, the images are visible (see Figures 1 and 2 of Patent Document 2).

Patent No. 5725581 Patent No. 6839319

In the printed matter described in Patent Document 1, the color development of the pattern (design) may deteriorate depending on the particle size of the interference pigment. A printed matter with excellent color development is desired so that the viewer can easily recognize the colors of the design. Meanwhile, the printed matter described in Patent Document 1 may be placed in front of a display device that has a display that turns black when the power is off. In this case, when the power is off, the design of the printed matter may appear dark, and the visibility of the design may be deteriorated.

The present invention is intended to solve the above-mentioned problems, and aims to provide a printed matter and a display device having a pattern with excellent visibility and color development.

[1] In one aspect, the present invention relates to a printed matter comprising a translucent substrate and a pattern printed layer. In this printed matter, the pattern printed layer is provided on one surface of the translucent substrate and has a first color pattern layer composed of a plurality of first color dots, and a second color pattern layer is provided on the first color pattern layer and composed of a plurality of second color dots. In this printed matter, each of the plurality of first color dots includes a first color binder and a plurality of first color pigment chips dispersed inside the first color binder, and each of the plurality of second color dots includes a second color binder and a plurality of second color pigment chips dispersed inside the second color binder. Either one of the plurality of first color pigment chips and the plurality of second color pigment chips is a first interference pigment of a plurality of colors that generates a first interference light different from each other, and the other of the plurality of first color pigment chips and the plurality of second color pigment chips is a second interference pigment that generates a monochromatic second interference light different from the mixed color indicated by the plurality of first interference pigments. In this printed matter, at least one of the first and second interference pigments contains a small particle grade interference pigment with a particle size range of 5 μm to 25 μm and a large particle grade interference pigment with a particle size range of 25 μm to 40 μm, and the small particle grade interference pigment is arranged to fill the gaps between the large particle grade interference pigments, and a plurality of first interference lights and second interference lights are additively mixed.

According to the study of the present inventors, it was found that when the particle size of the interference pigment contained in the pattern printing layer is small, the color development is weak, but the pattern does not look dark even when the printed matter is placed in front of a black screen. On the other hand, it was found that when the particle size of the interference pigment contained in the pattern printing layer is large, the transparency of the printed matter increases, but the color development of the pattern can be improved. Therefore, the present inventors have come up with a printed matter in which the pattern does not look dark and the color development of the pattern is excellent by configuring an interference pigment to include a small particle diameter grade interference pigment and a large particle diameter grade interference pigment, and arranging the small particle diameter grade interference pigment so as to fill the gaps between the large particle diameter grade interference pigments. Therefore, a printed matter having the above configuration can provide a pattern with excellent visibility and color development. Furthermore, in this printed matter, the decrease in the transparency of the pattern printing layer is suppressed by including a large particle diameter grade interference pigment. Therefore, with this printed matter, the decrease in the visibility of the image on the display device is effectively suppressed when the power is on.

[2] In the printed matter of [1] above, the large particle grade interference pigment may have a particle size range of 25 μm to 60 μm. In this case, the color development of the pattern can be improved. In addition, by suppressing unnecessary reduction in the transparency of the pattern printed layer, the visibility of the image on the display device can be improved when the display device is used.

[3] In the printed matter of [1] or [2] above, at least one of the small particle grade interference pigment and the large particle grade interference pigment may be an interference pigment containing titanium dioxide-coated mica. In this case, the wavelength of the interference light can be adjusted by adjusting the film thickness and transmittance of the titanium dioxide film. In addition, the sense of brilliance can be improved by increasing the smoothness of the mica surface.

[4] Any of the printed matter [1] to [3] above may further include a white pattern layer formed on the second color pattern layer and composed of a plurality of silver dots, and each of the plurality of silver dots may contain a silver binder and a plurality of silver pigment chips dispersed within the silver binder. In this case, the color development of the first color pattern layer and the second color pattern layer is superior, and the pattern printing layer can have a pattern that gives a whitish impression.

[5] Any of the printed matter [1] to [4] above may further include a transparent smoke print layer provided on the outermost surface of the picture print layer on the side opposite the light-transmitting substrate. In this case, the color development of the first color pattern layer and the second color pattern layer is more excellent. Furthermore, since the transparent smoke print layer has transparency, the decrease in visibility of the image on the display device is effectively suppressed.

[6] In another aspect, the present invention relates to a display device. This display device includes any one of the printed matter [1] to [5] above and a light source. With this display device, when the light source is not lit, the pattern on the pattern printing layer is visible, and when the light source is lit, the transmitted light from the light source (pattern display, video display, etc.) is visible.

[7] In the display device of [6] above, the light source may be a display device. With this display device, when the display is not lit, the pattern on the pattern printing layer is visible, and when the display is lit, the transmitted light from the display (pattern display, image display, etc.) is visible.

The present invention makes it possible to provide printed matter and display devices having patterns with excellent visibility and color development.

FIG. 1 is a cross-sectional view illustrating a display device according to a first embodiment. FIG. 2 is a cross-sectional view that typically shows a picture print layer provided in the display device shown in FIG. FIG. 3 is a cross-sectional view illustrating a printed matter according to the second embodiment. FIG. 4 is a cross-sectional view that illustrates a white pattern layer provided in the printed matter illustrated in FIG. FIG. 5 is a cross-sectional view illustrating a printed matter according to the third embodiment. FIG. 6 is a cross-sectional view illustrating a printed matter according to a fourth embodiment. FIG. 7 is a table showing the configurations of the printed matter according to the first to third experimental examples.

Specific examples of display devices according to embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to these examples, but is intended to include all modifications within the scope of the claims and meaning equivalent to the claims. In the following description, the same elements in the description of the drawings will be given the same reference numerals, and duplicate descriptions will be omitted.

[First embodiment]
FIG. 1 is a cross-sectional view showing a display device according to the first embodiment. FIG. 2 is a cross-sectional view showing a pattern printed layer included in the display device shown in FIG. 1. As shown in FIG. 1, the display device 1 includes a printed matter 2 and a light source 3. The printed matter 2 is a sheet for expressing a pattern, and includes a light-transmitting substrate 4, a pattern printed layer 5, and a transparent smoke printed layer 30. The printed matter 2 is provided in front of the light source 3 (between the viewer and the light source 3). The printed matter 2 has total light transmittance. Therefore, when the power source of the light source 3 is ON, the viewer can see the light from the light source 3 that has passed through the printed matter 2, and when the power source of the light source 3 is OFF, the viewer can see the pattern expressed by the printed matter 2. The light source 3 is, for example, a display device.

The light-transmitting substrate 4 is a substrate that is transparent to visible light. The light-transmitting substrate 4 is made of, for example, a transparent resin. Examples of transparent resins include PET, PMMA, polyethylene, polypropylene, and nylon. The thickness of the light-transmitting substrate 4 is, for example, 25 μm to 250 μm. If necessary, a surface protection layer may be provided on the surface side of the light-transmitting substrate 4 (the side opposite to the picture print layer 5).

The pattern printed layer 5 is a layer that expresses the pattern of the printed matter 2. The pattern printed layer 5 includes a first color pattern layer 10 provided on one surface 4a of the light-transmitting substrate 4, and a second color pattern layer 20 provided on the first color pattern layer 10.

The first color pattern layer 10 can be provided on the surface 4a by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 2, the first color pattern layer 10 is composed of a plurality of first color dots 11. Here, "dot" means a point that is an element that constitutes a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of first color dots 11 includes a first color binder 12 and a plurality of first color pigment chips 13 dispersed inside the first color binder 12. The content of the plurality of first color pigment chips 13 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, assuming that the first color binder 12 is 100 parts by weight.

Examples of the first color binder 12 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, etc. The thickness of the first color pattern layer 10 is, for example, 1 μm to 10 μm. The first color pattern layer 10 may contain a hardener. In this case, the heat resistance of the first color pattern layer 10 and the adhesion of the first color pattern layer 10 to the light-transmitting substrate 4 can be improved.

In the first embodiment, the multiple first color pigment chips 13 are multiple color first interference pigments 14a, 14b that generate different interference light from each other. Each of the first interference pigments 14a, 14b is composed of a flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the flake. Light that is reflected on the surface of the metal oxide film out of the light incident on the first color pattern layer 10 from the translucent substrate 4 side interferes with light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

In the first embodiment, each of the first interference pigments 14a and 14b is, for example, titanium dioxide-coated mica. The flakes constituting the first interference pigments 14a and 14b may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the first interference pigments 14a and 14b may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

The first interference pigment 14a includes a plurality of first titanium dioxide-coated micas 15a of a small particle size grade including a particle size range of 5 μm to 25 μm, and a second titanium dioxide-coated mica 15b of a large particle size grade including a particle size range of 25 μm to 40 μm. The first interference pigment 14b includes a plurality of first titanium dioxide-coated micas 16a of a small particle size grade including a particle size range of 5 μm to 25 μm, and a plurality of second titanium dioxide-coated micas 16b of a large particle size grade including a particle size range of 25 μm to 40 μm. The average particle size (D50) of the first titanium dioxide-coated micas 15a and 16a is, for example, about 15 μm, and the average particle size (D50) of the second titanium dioxide-coated micas 15b and 16b is, for example, about 25 μm. As a result, the average particle size of the first titanium dioxide coated mica 15a, 16a is smaller than the average particle size of the second titanium dioxide coated mica 15b, 16b. The second titanium dioxide coated mica 15b, 16b may have a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide coated mica 15b, 16b is, for example, about 35 μm. As shown in FIG. 2, each of the multiple first titanium dioxide coated mica 15a, 16a is arranged so as to fill the gaps between the multiple second titanium dioxide coated mica 15b, 16b. Here, "particle size" means the longest diameter of the particle cross section.

When the incident light L is incident on the first color pattern layer 10, the first interference pigments 14a and 14b generate first interference lights 17a and 17b that are different from each other. That is, the wavelengths of the first interference lights 17a and 17b are different from each other. As a result, the first interference pigments 14a and 14b exhibit a mixed color. The first interference pigments 14a and 14b may be, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment), respectively. In this case, the first interference lights 17a and 17b exhibit red and gold, respectively. The first interference pigments 14a and 14b may be interference pigments of other colors. The blending amounts of the first interference pigments 14a and 14b may be the same or different from each other.

The second color pattern layer 20 can be provided on the first color pattern layer 10 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 2, the second color pattern layer 20 is composed of a plurality of second color dots 21. Here, "dot" means a point that is an element that constitutes a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of second color dots 21 includes a second color binder 22 and a plurality of second color pigment chips 23 dispersed inside the second color binder 22. The content of the plurality of second color pigment chips 23 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, assuming that the second color binder 22 is 100 parts by weight.

Examples of the second color binder 22 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, polycarbonate resins, etc. The thickness of the second color pattern layer 20 is, for example, 1 μm to 10 μm. The second color pattern layer 20 may contain a hardener. In this case, the heat resistance of the second color pattern layer 20 and the adhesion of the second color pattern layer 20 to the first color pattern layer 10 can be improved.

In the first embodiment, the multiple second color pigment chips 23 are second interference pigments 24 that generate monochromatic interference light different from the mixed color represented by the first interference pigments 14a, 14b. The second interference pigment 24 is composed of a thin flake (not shown) that is transparent to visible light and a metal oxide film (not shown) that covers the thin flake. The light that is reflected on the surface of the metal oxide film out of the light incident on the second color pattern layer 20 from the translucent substrate 4 side interferes with the light that passes through the metal oxide film and is reflected on the surface of the flake, generating interference light. By adjusting the film thickness of the metal oxide film and the refractive index of the metal oxide film, interference light having a desired wavelength can be generated.

In the first embodiment, the second interference pigment 24 is, for example, titanium dioxide-coated mica. The flakes constituting the second interference pigment 24 may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the second interference pigment 24 may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

The second interference pigment 24 includes a plurality of first titanium dioxide-coated mica 25a of a small particle size grade including a particle size range of 5 μm to 25 μm, and a second titanium dioxide-coated mica 25b of a large particle size grade including a particle size range of 25 μm to 40 μm. The average particle size (D50) of the first titanium dioxide-coated mica 25a is, for example, about 15 μm, and the average particle size (D50) of the second titanium dioxide-coated mica 25b is, for example, about 25 μm. As a result, the average particle size of the first titanium dioxide-coated mica 25a is smaller than the average particle size of the second titanium dioxide-coated mica 25b. The second titanium dioxide-coated mica 25b may include a particle size range of 25 μm to 60 μm. In this case, the average particle size (D50) of the second titanium dioxide-coated mica 25b is, for example, about 35 μm. Each of the multiple first titanium dioxide-coated mica 25a is arranged to fill the gaps between the multiple second titanium dioxide-coated mica 25b. Here, "particle size" means the longest diameter of the particle cross section.

When the incident light L is incident on the second color pattern layer 20, the second interference pigment 24 generates a monochromatic second interference light 26. As a result, the second interference pigment 24 exhibits a monochromatic color. The second interference pigment 24 may be any interference pigment that generates a monochromatic second interference light 26 different from the mixed color exhibited by the first interference pigments 14a, 14b, and may be, for example, a green interference pigment (green pearl pigment). In this case, the second interference light 26 exhibits green. Note that the second interference pigment 24 may be an interference pigment of a color other than green.

The transparent smoke print layer 30 is a layer for attenuating light transmitted through the printed matter 2. The transparent smoke print layer 30 is provided on the outermost surface of the picture print layer 5 on the side opposite the light-transmitting substrate 4. In the first embodiment, the transparent smoke print layer 30 is provided on the second color pattern layer 20 as shown in FIG. 1. The transparent smoke print layer 30 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing using an ink in which a small amount of carbon black is dispersed in a resin binder such as a vinyl-based, acrylic-based, urethane-based, or polyester-based binder. The thickness of the transparent smoke print layer 30 is, for example, 1 μm to 10 μm.

In the printed matter 2, the pattern is expressed by additively mixing the first interference light 17a, 17b generated by the first interference pigments 14a, 14b and the second interference light 26 generated by the second interference pigment 24.

The total light transmittance of the printed matter 2 is, for example, 30% to 70%. The total light transmittance here refers to the value measured using a spectrophotometer (for example, the UV-2100 spectrophotometer manufactured by Shimadzu Corporation).

In the printed matter 2 according to the first embodiment described above, in the first color pattern layer 10, each of the plurality of first titanium dioxide-coated micas 15a, 16a of the small particle diameter grade including a particle diameter range of 5 μm to 25 μm is arranged so as to fill the gaps between the plurality of second titanium dioxide-coated micas 15b, 16b of the large particle diameter grade including a particle diameter range of 25 μm to 40 μm. In the printed matter 2, in the second color pattern layer 20, each of the plurality of first titanium dioxide-coated micas 25a of the small particle diameter grade including a particle diameter range of 5 μm to 25 μm is arranged so as to fill the gaps between the plurality of second titanium dioxide-coated micas 25b of the large particle diameter grade including a particle diameter range of 25 μm to 40 μm. Therefore, according to the printed matter 2, a pattern with excellent visibility and color development can be provided. Furthermore, in the printed matter 2, the first color pattern layer 10 contains second titanium dioxide-coated mica 15b, 16b of large particle size grade, and the second color pattern layer 20 contains second titanium dioxide-coated mica 25b of large particle size grade, thereby suppressing the decrease in transparency of the picture print layer 5. Therefore, according to the printed matter 2, when the power is on, the decrease in visibility of the image on the display device is effectively suppressed.

In the first embodiment, the second titanium dioxide coated mica 15b, 16b, 25b of the large particle size grade may be configured to include a particle size range of 25 μm to 60 μm. In this case, the color development of the pattern is more excellent. In addition, by suppressing unnecessary reduction in the transparency of the pattern printed layer 5, the visibility of the image on the display device 1 can be improved when the display device is used.

In the first embodiment, the first interference pigments 14a, 14b and the second interference pigment 24 are interference pigments containing titanium dioxide-coated mica. Therefore, by adjusting the film thickness and transmittance of the titanium dioxide film, it is possible to adjust the wavelength of the interference light. In addition, by increasing the smoothness of the mica surface, it is possible to improve the sense of luminance.

In the first embodiment, the printed matter 2 includes a transparent smoke print layer 30 provided on the second color pattern layer 20. This provides better color development between the first color pattern layer 10 and the second color pattern layer 20. Furthermore, because the transparent smoke print layer 30 is transparent, the decrease in visibility of the image on the display device 1 is effectively suppressed.

In the first embodiment, the display device 1 includes a printed matter 2 and a light source 3. According to the display device 1, when the light source 3 is not lit, the pattern on the pattern printing layer 5 is visible, and when the light source 3 is lit, the transmitted light from the light source 3 (pattern display, image display, etc.) is visible.

In the first embodiment, the light source 3 may be a display device. In this case, when the display is not turned on, the pattern on the pattern printing layer 5 is visible, and when the display is turned on, the transmitted light from the display (pattern display, image display, etc.) is visible.

[Second embodiment]
In the following, a printed matter 2A according to the second embodiment will be described with reference to Figures 3 and 4. In the description of the second embodiment, descriptions that overlap with the first embodiment will be omitted, and only differences from the first embodiment will be described. In other words, the descriptions of the first embodiment may be used as appropriate in the second embodiment to the extent technically possible.

Figure 3 is a cross-sectional view that shows a schematic representation of a printed matter according to the second embodiment. Figure 4 is a cross-sectional view that shows a schematic representation of a white pattern layer that the printed matter shown in Figure 3 has. The printed matter 2A has a light-transmitting substrate 4 and a picture print layer 5. The printed matter 2A further has a white pattern layer 40 that is provided on the second color pattern layer 20.

The white pattern layer 40 can be provided on the second color pattern layer 20 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. As shown in FIG. 4, the white pattern layer 40 is composed of a plurality of silver dots 41. Here, "dot" means a point that is an element that constitutes a printed image, and its shape is not limited to a circle, but may be a rectangle, a polygon, or other shape. Each of the plurality of silver dots 41 contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed inside the silver binder 42. The content of the plurality of silver pigment chips 43 is, for example, in the range of 0.5 parts by weight to 20 parts by weight, assuming that the silver binder 42 is 100 parts by weight.

Examples of the silver binder 42 include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the white pattern layer 40 is, for example, 1 μm to 10 μm. The white pattern layer 40 may contain a hardener. In this case, the heat resistance of the white pattern layer 40 and the adhesion of the white pattern layer 40 to the second color pattern layer 20 can be improved.

Even with the configuration of the printed matter 2A described above, the same effects as those of the first embodiment are achieved. Furthermore, in the second embodiment, a white pattern layer 40 is provided on the second color pattern layer 20 and is composed of a plurality of silver dots 41, and each of the plurality of silver dots 41 contains a silver binder 42 and a plurality of silver pigment chips 43 dispersed inside the silver binder 42. This allows the color development of the first color pattern layer 10 and the second color pattern layer 20 to be excellent, and the pattern printed layer 5 to have a pattern that gives a whitish impression.

[Third embodiment]
In the following, a printed matter 2B according to the third embodiment will be described with reference to Fig. 5. In the description of the third embodiment, descriptions that overlap with the first and second embodiments will be omitted, and only differences from the first and second embodiments will be described. In other words, the descriptions of the first and second embodiments may be used as appropriate in the third embodiment to the extent technically possible.

Figure 5 is a cross-sectional view showing a schematic of a printed matter according to the third embodiment. The printed matter 2B has a light-transmitting substrate 4 and a picture print layer 5. In other words, the printed matter 2B does not have a translucent smoke print layer 30 and a white pattern layer 40. Even with the configuration of the printed matter 2B described above, the same effects as those of the first embodiment can be achieved.

[Fourth embodiment]
In the following, a printed matter 2C according to the fourth embodiment will be described with reference to Fig. 6. In the description of the fourth embodiment, descriptions that overlap with the first, second, and third embodiments will be omitted, and only differences from the first, second, and third embodiments will be described. In other words, the descriptions of the first, second, and third embodiments may be used as appropriate in the fourth embodiment to the extent technically possible.

Figure 6 is a cross-sectional view showing a schematic of a printed matter according to the fourth embodiment. The printed matter 2C comprises a light-transmitting substrate 4, a picture print layer 5, a white pattern layer 40, and a transmissive smoke print layer 30. The white pattern layer 40 is provided on the second color pattern layer 20, and the transmissive smoke print layer 30 is provided on the white pattern layer 40. Even with the configuration of the printed matter 2C described above, the same effects as those of the first, second, and third embodiments can be achieved.

The display device and printed matter according to the present invention are not limited to the above-described embodiment, and various other modifications are possible. For example, the second color pattern layer may include a first interference pigment that generates first interference light that is different from each other, and the first color pattern layer may include a second interference pigment that generates a single-color second interference light that is different from the mixed color exhibited by the multiple first interference pigments in the second color pattern layer.

In each of the above embodiments, the first interference pigment and the second interference pigment each contain a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas, but it is sufficient that at least one of the first interference pigment and the second interference pigment contains a plurality of first titanium dioxide-coated micas and a plurality of second titanium dioxide-coated micas. In addition, in each of the above embodiments, the first color pigment chip is a first interference pigment of two colors, but the first color pigment chip may be a first interference pigment of three or more colors. Also, the first interference pigments of multiple colors may be mixed together.

[Experimental Example]
Here, the tendency of the image and the pattern on the LCD monitor depending on the particle size of the titanium dioxide-coated mica contained in the pattern printing layer will be described using an experimental example. As shown in FIG. 7 and experimental examples 1 to 3 described later, printed matter was produced in which the particle size of the titanium dioxide-coated mica was adjusted. FIG. 7 is a diagram showing the structure of the printed matter according to experimental examples 1 to 3. A LCD monitor was placed on the back side (transparent smoke printed layer side) of the printed matter according to experimental examples 1 to 3. The distance between the printed matter and the LCD monitor was 2 mm. The visibility (items 1 to 4 described later) of the LCD monitor when it was turned on and off was evaluated. Sensory evaluation was performed by four people for items 1 to 4, and the average score was calculated.

<Experimental Example 1>
A printed matter was produced by providing a first color pattern layer, a second color pattern layer, a white pattern layer, and a transparent smoke print layer in this order on a transparent substrate made of transparent PET. In Experimental Example 1, a first color pattern layer was formed by screen printing technology using an ink containing a first color binder (urethane resin) and a red interference pigment and a gold interference pigment dispersed inside the first color binder. The contents of the red interference pigment and the gold interference pigment were 8 parts by weight of a red interference pigment having a particle size of 10 to 40 μm, 2 parts by weight of a red interference pigment having a particle size of 5 to 25 μm, 5 parts by weight of a gold interference pigment having a particle size of 10 to 60 μm, and 2 parts by weight of a gold interference pigment having a particle size of 5 to 25 μm, when the first color binder was taken as 100 parts by weight.

In Experimental Example 1, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and a green interference pigment dispersed inside the second color binder. The green interference pigment content was 4 parts by weight of a green interference pigment with a particle size of 10 to 40 μm and 1 part by weight of a green interference pigment with a particle size of 5 to 25 μm, assuming that the second color binder was 100 parts by weight. The red interference pigment, gold interference pigment, and green interference pigment were all titanium dioxide-coated mica.

In Experimental Example 1, a white pattern layer was formed by screen printing using an ink containing a silver binder (urethane resin) and silver pigment chips dispersed inside the silver binder. The content of the silver pigment chips was 1 part by weight of silver pigment chips having a particle size of 5 to 25 μm for every 100 parts by weight of silver binder. Furthermore, a transparent smoke print layer was formed by screen printing using an ink in which medium ink and black ink were mixed in a ratio of 40:1.

<Experimental Example 2>
A printed matter was produced by providing a first color pattern layer, a second color pattern layer, a white pattern layer, and a transparent smoke print layer in this order on a transparent substrate made of transparent PET. In Experimental Example 2, a first color pattern layer was formed by screen printing technology using an ink containing a first color binder (urethane resin) and a red interference pigment and a gold interference pigment dispersed inside the first color binder. The contents of the red interference pigment and the gold interference pigment were 8 parts by weight of a red interference pigment having a particle size of 10 to 40 μm, 2 parts by weight of a red interference pigment having a particle size of 5 to 25 μm, 5 parts by weight of a gold interference pigment having a particle size of 10 to 60 μm, and 2 parts by weight of a gold interference pigment having a particle size of 5 to 25 μm, when the first color binder was taken as 100 parts by weight.

In Experimental Example 2, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and a green interference pigment dispersed inside the second color binder. The content of the green interference pigment was 4 parts by weight of the green interference pigment having a particle size of 10 to 40 μm for every 100 parts by weight of the second color binder. The red interference pigment, gold interference pigment, and green interference pigment were all titanium dioxide-coated mica.

In Experimental Example 2, a white pattern layer was formed by screen printing using an ink containing a silver binder (urethane resin) and silver pigment chips dispersed inside the silver binder. The content of the silver pigment chips was 1 part by weight of silver pigment chips having a particle size of 5 to 25 μm for every 100 parts by weight of silver binder. Furthermore, a transparent smoke print layer was formed by screen printing using an ink in which medium ink and black ink were mixed in a ratio of 40:1.

<Experimental Example 3>
A printed matter was produced by providing a first color pattern layer, a second color pattern layer, and a transparent smoke print layer in this order on a transparent substrate made of transparent PET. In Experimental Example 3, a first color pattern layer was formed by screen printing technology using an ink containing a first color binder (urethane resin) and a green interference pigment dispersed inside the first color binder. The content of the green interference pigment was 4 parts by weight of a green interference pigment having a particle size of 10 to 40 μm and 1 part by weight of a green interference pigment having a particle size of 5 to 25 μm, when the first color binder was taken as 100 parts by weight.

In Experimental Example 3, a second color pattern layer was formed by screen printing using an ink containing a second color binder (urethane resin) and red and gold interference pigments dispersed inside the second color binder. The red and gold interference pigment contents were 8 parts by weight of red interference pigment with a particle size of 10 to 40 μm and 5 parts by weight of gold interference pigment with a particle size of 10 to 60 μm, assuming that the second color binder was 100 parts by weight.

In Experimental Example 3, a transparent smoke print layer was formed using screen printing technology using a mixture of medium ink and black ink in a ratio of 40:1.

<Item 1: Clarity of displayed content>
When the power supply of the liquid crystal monitor was turned on, the clarity of the images and characters displayed on the liquid crystal monitor was evaluated.
<Score>
5 points: The pattern has a weak presence compared to the image and text displayed on the LCD monitor, and the image and text appear clear.
3 points: The pattern has a somewhat strong presence compared to the image and text displayed on the LCD monitor, and the pattern appears to overlap the image and text slightly.
1 point: The pattern has a strong presence compared to the image and text displayed on the LCD monitor, and the image and text appear to be covered by the pattern.

<Item 2: Brightness of displayed content>
When the power supply of the liquid crystal monitor was turned on, the brightness of the images and characters displayed on the liquid crystal monitor was evaluated.
<Score>
5 points: Images and characters displayed on the LCD monitor appear bright.
3 points: Images and characters displayed on the LCD monitor appear slightly dark.
1 point: Images and text displayed on the LCD monitor appear quite dark.

<Item 3: Influence of black LCD monitors>
The effect of the black LCD monitor on the image when the LCD monitor was turned off was evaluated.
<Score>
5 points: There is no effect from the black color of the LCD monitor, and the image is fully visible.
3 points: The influence of the black color of the LCD monitor is slightly noticeable, and the image appears to be somewhat dark and sunken (slightly high transparency).
1 point: The influence of the black color of the LCD monitor is evident, making the image appear quite dark (high transparency).

<Item 4: Color development of the picture>
The color development of the image was evaluated when the power of the liquid crystal monitor was turned off.
<Score>
5 points: The color of the pattern is good.
3 points: The color of the pattern is slightly weak and the color of the pattern appears pale (whitish).
1 point: The color of the pattern is weak and the color of the pattern appears white.

The results of the sensory evaluation of items 1 to 4 for Experimental Examples 1 to 3 are shown in Table 1 below. Anything that received a rating of 3 points or more was deemed to be at a level that is acceptable for practical use. Experimental Example 1 showed that the effect of the black LCD monitor on the image was fairly low, and the image's visibility tended to be expressed at a sufficiently high level. High evaluation results were also obtained for the color of the image and the clarity and brightness of the image and text display. Meanwhile, Experimental Examples 2 and 3 showed that the effect of the black LCD monitor on the image was kept low, while the color of the image and the clarity and brightness of the image and text display tended to be generally good.

1...display device, 2, 2A, 2B, 2C...printed matter, 3...light source, 4...translucent substrate, 5...picture print layer, 10...first color pattern layer, 11...first color dot, 12...first color binder, 13...first color pigment chip, 14a, 14b...first interference pigment, 15a, 16a, 25a...first titanium dioxide coated mica, 15b, 16b, 25b...second titanium dioxide coated mica, 17a, 17b...first interference light, 20...second color pattern layer, 21...second color dot, 22...second color binder, 23...second color pigment chip, 24...second interference pigment, 26...second interference light, 30...translucent smoke print layer, 40...white pattern layer, 41...silver dot, 42...silver binder, 43...silver pigment chip.

Claims (6)

A printed matter comprising a light-transmitting substrate and a picture-printed layer,
The pattern printed layer is
a first color pattern layer provided on one surface of the light-transmitting base material and configured with a plurality of first color dots;
a second color pattern layer provided on the first color pattern layer and configured by a plurality of second color dots;
Each of the first color dots includes a first color binder and a plurality of first color pigment chips dispersed within the first color binder;
Each of the plurality of second color dots includes a second color binder and a plurality of second color pigment chips dispersed within the second color binder;
one of the plurality of first color pigment chips and the plurality of second color pigment chips is a first interference pigment of a plurality of colors that generates first interference light different from each other;
the other of the plurality of first color pigment chips and the plurality of second color pigment chips is a second interference pigment that generates a second interference light of a single color different from the mixed color represented by the plurality of first interference pigments;
At least one of the first interference pigment and the second interference pigment includes a small particle size grade interference pigment having a particle size range of 5 μm to 25 μm and a large particle size grade interference pigment having a particle size range of 25 μm to 60 μm;
The small particle size grade interference pigments are arranged to fill gaps between the large particle size grade interference pigments,
A printed matter, wherein the plurality of first interference lights and the second interference light are additively mixed. At least one of the small particle size grade interference pigment and the large particle size grade interference pigment is an interference pigment containing titanium dioxide-coated mica;
The printed matter according to claim 1. A white pattern layer is provided on the second color pattern layer and is composed of a plurality of silver dots.
Each of the plurality of silver dots includes a silver binder and a plurality of silver pigment chips dispersed within the silver binder.
The printed matter according to claim 1. Further comprising a transparent smoke printed layer provided on the outermost surface of the picture printed layer on the opposite side to the light-transmitting substrate,
The printed matter according to claim 1. The printed matter according to any one of claims 1 to 4,
A display device comprising: a light source. The light source is a display device.
The display device according to claim 5 .

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