JP5845567B2 - Micro lens decoration - Google Patents

Description

  The present invention relates to a decorative body having a special visual effect using a microlens.

  Conventionally, patterns using moire have been used as building materials and decoration materials. The most rudimentary moire pattern is obtained by overlapping two identical screens and rotating one screen. By applying this principle, the shape and angle of the pattern as the unit of the pattern. By changing variously, it is possible to create an infinite variety of patterns.

  On the other hand, there is known a decorative material that exhibits a special visual effect by using a microlens sheet in which microlenses that are fine convex lenses are regularly arranged on the surface of a transparent synthetic resin plate. The microlens sheet is an expensive sheet because it is a sheet manufactured by forming fine irregularities on the surface of a thermoplastic resin sheet using a precise mold. The decorative sheet described in Patent Document 1 is provided with a plurality of convex lens-shaped protrusions in a continuous pattern on the surface of a transparent sheet and a pattern having the same continuous pattern as the surface on the back surface of the sheet. It is a decorative sheet printed by being displaced with respect to a pattern.

  The decorative sheet described in Patent Document 1 must be expensive because a lens sheet using a mold is used. Moreover, as long as a lens sheet using a mold is used, it is not impossible to realize a design in which the effects of the lens are partially arranged, but it is more difficult in terms of cost.

  Attempts have also been made to form microlenses by printing rather than molding. The dot-drawn pattern decorative body described in Patent Document 2 is a regular arrangement of a large number of independent convex condensing elements having transparency on a surface of a transparent substrate by a printing ink having transparency at a constant fine pitch. A large number of colored pixels are printed on the back surface of the transparent substrate in the same shape as the convex condensing elements on the front surface or in the same arrangement state or in different shapes and the same arrangement state. The positional relationship is shifted with respect to the convex condensing element on the surface so that the size changes greatly, and the colored pixels appear as an enlarged image with a stereoscopic effect when viewed from the surface, and the viewpoint is moved. And an enlarged image of a point drawing pattern characterized in that the enlarged image exhibits a sense of fluctuation.

  This decorative object is a three-dimensional dot drawing pattern that uses the phenomenon that the amplitude increases or decreases when the crossing angle is shifted by overlapping regular patterns like halftone dots, and the dots appear to fluctuate. It is a decorative body that has appeared.

  The three-dimensional pattern decorative body described in Patent Document 3 is provided with a plurality of layers or a single layer in a predetermined pattern continuously with a dot-like pattern colored in a desired color on the surface of a transparent or opaque decorative body, A transparent dot-shaped convex lens having a substantially hemispherical cross section is continuously attached to the surface of the decorative body and each pattern in the same pattern as the above pattern, and a moire pattern appears on each pattern and each convex lens pattern. The pattern and the convex lens are arranged so as to gradually become dense toward the dense area set on the surface of the decorative body, and are arranged in a rough area set in a portion far from the dense area. It is a three-dimensional pattern decorative body arranged in a gradation that gradually becomes rough toward. This decorative body can three-dimensionally display a gradation moire pattern having a dense area and a rough area.

Since the decorative body of the point drawing pattern described in Patent Document 2 and the three-dimensional pattern decorative body described in Patent Document 3 both form lenses by printing means, it is not possible to use expensive molds. However, since a screen printing method that relatively easily deposits ink is used as a means for forming lenses, there is a limit to accurately forming and arranging fine lenses over a large area. The screen printing method is slow in printing speed and is not suitable for mass production.

  In addition, since any of the above decorative bodies realizes the generation of a moire pattern by a method of changing the angle of one pattern, the generated moire pattern itself is accompanied by some angle and gives a controlled and neat impression. It cannot be said to be a thing.

  The decorative body described in Patent Document 4 includes, on a reflective layer, a pixel layer formed by aligning a plurality of pixels, and a plano-convex lens layer formed by aligning a plurality of plano-convex lenses laminated thereon. It is a decorative body. Patent Document 4 describes a configuration in which an enlarged image appears by changing the arrangement angle between the pixel layer and the plano-convex lens layer or changing the arrangement pitch. In addition, a configuration in which a transparent layer is positioned between the reflective layer and the pixel layer is described.

  In the decorative body described in Patent Document 4, according to the configuration in which the angle between the pixel layer and the plano-convex lens layer is not changed and the pitch of the array is changed, a controlled enlarged image without an angle can be obtained. However, also in the decorative body described in Patent Document 4, as a means for forming the plano-convex lens layer, the enlarging printing by the screen printing method is described, and a fine microlens cannot be formed.

Japanese Patent No.2761861 Japanese Patent No. 3338860 JP 2005-193501 A JP 2009-262374

  All of the above-mentioned conventional decorative bodies provide a visual image using moire due to interference. However, when trying to combine a pattern expression with a normal gradation and a gradation effect, it is necessary to print these images. As a result of performing the necessary shading operation, it has been found that there is a problem that these patterns interfere with the microlenses and an unintended interference pattern appears.

  The problem to be solved by the present invention is a visual effect having a structure of base material / reflective layer / visual expression pattern / microlens, in which fine microlenses are accurately formed and arranged, and directionality is accurately controlled. In a decorative body that displays an enlarged pattern of visual expression pattern by, even if another pattern layer or gradation pattern layer is provided between the reflective layer and the visual expression pattern, free expression without interference by these The present invention intends to provide a microlens decorative body that can be used.

As a means for solving the above-mentioned problems, the invention according to claim 1 is characterized in that a visual expression pattern provided in a pattern on a base material with a reflective layer, a pattern layer, and a pitch A, and repelling the visual expression pattern surface. A liquid repellent pattern provided in a pattern shape with a constant pitch B using a liquid varnish, and a microlens formed on the pattern portion by applying a transparent varnish on the liquid repellent pattern; In the microlens decorative body that makes the pitch A and the pitch B different from each other so that the interference pattern in which the visual expression pattern is enlarged appears at a uniform pitch and is stereoscopically viewed, the pattern layer has a dot area. microlens ornamental body rate is characterized in that it is a picture having a gradation by colored transparent varnish using a transparent pigment or dye that is shaded by the FM screen is 30% or more and less than 90% That.

The invention according to claim 2, the resolution of the pattern layer is a microlens decorative body of claim 1, wherein less than or 150 DPI 4000 dpi.

  In the decorative body according to the present invention, a microlens is formed by a liquid-repellent pattern provided in a pattern shape using a liquid-repellent varnish and a transparent varnish applied on the liquid-repellent pattern. A lens can be efficiently formed by a printing method. For this reason, the decorative body according to the present invention is a sophisticated decorative body with a fine visual effect.

  In addition, the decorative body according to the present invention has a pattern (hereinafter abbreviated as an enlarged pattern) in which the visual expression pattern is enlarged by interference by changing the pitch of the visual expression pattern provided in a pattern on the substrate and the pitch of the microlenses. Since it is generated, the enlarged pattern maintains the same directionality common to the visual expression pattern and the microlens pattern, and gives a tightly controlled impression. In addition, since the generated enlarged pattern appears to move as the viewpoint moves, a three-dimensional feeling is expressed.

  Moreover, since the decorative body which concerns on this invention provided the reflective layer between the base material and the visual expression pattern, an enlarged pattern is expressed strongly.

  Further, since the pattern layer provided between the reflective layer and the visual expression pattern is a shaded pattern by the FM screen, moire due to interference occurs between the visual expression pattern and the microlens arranged at a specific pitch. It became possible to print freely.

  When the halftone dot area ratio of the pattern layer is 30% or more and less than 90%, the appearance of the enlarged pattern caused by the interference between the visual expression pattern and the microlens is hardly hindered, and high designability can be maintained. is there.

  When the resolution of the pattern layer is 150 DPI or more and less than 4000 DPI, the feeling of roughness does not occur and the printing technique can be implemented without any problem.

FIG. 1 is a cross-sectional explanatory view showing an embodiment of a microlens decorative body according to the present invention. FIG. 2 is an enlarged plan view showing one embodiment of the microlens decorative body according to the present invention. FIG. 3 is an enlarged plan view illustrating a mechanism in which an enlarged pattern is generated in the microlens decorative body according to the present invention. FIG. 4 is an enlarged plan view illustrating a mechanism in which an enlarged pattern is generated in the microlens decorative body according to the present invention, in which the enlargement magnification is lower than that in FIG. FIG. 5 is a schematic diagram showing the concept of the FM screen.

Hereinafter, the microlens decorative body according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional explanatory view showing an embodiment of the microlens decorative body according to the present invention, and FIG. 2 is an enlarged plan explanatory view showing an embodiment of the microlens decorative body according to the present invention. . The microlens decorative body according to the present invention has a liquid repellent property on the visual expression pattern 4 provided on the substrate 1 in a pattern with the reflective layer 2, the pattern layer 3, and the pitch A (7). The lyophobic liquid repellent pattern 5 is formed in a pattern with pitch B (8) using a varnish, and the microlens 6 is formed on the liquid repellent pattern 5 by applying a transparent varnish on the patterned pattern. By making A and pitch B different from each other, the decorative pattern which makes the visual expression pattern 4 enlarged and the three-dimensional visual appearance of the interference pattern in which the visual expression pattern 4 is enlarged is displayed. The pattern layer 3 is shaded by an FM screen. It is characterized by.

  As the substrate 1, a substrate of any material such as paper, a synthetic resin film, a synthetic resin plate can be used, but a feature of the present invention is that a fine microlens can be accurately formed even with a large-area substrate. In order to make good use of paper, a paper or a synthetic resin film that can use the offset printing method or the gravure rotary printing method is desirable. Printing by a screen printing method may be applied using a plate material such as a synthetic resin plate as a base material.

  As the reflective layer 2, a metal foil, a metal vapor deposition layer, an ink layer containing a bright pigment such as a metal powder pigment or a pearl pigment, or the like is used. You may use the vapor deposition paper and vapor deposition film which vapor-deposited aluminum on paper and a film as a base material with a reflecting layer. Due to the presence of the reflective layer 2, the incident external light is reflected by the reflective layer 2 and exits, so that the amount of light reflected increases and the enlarged pattern appears strongly.

  The pattern layer 3 needs to be a pattern shaded by an FM screen. The FM screen is an abbreviation for Frequency Modulation Screen, which is obtained by changing the density of halftone dots of a certain size, compared to the conventional AM screen that expresses gradation by the size of halftone dots arranged at a constant pitch. It expresses the key. FIG. 5 is a schematic diagram showing the concept of the FM screen. The equally sized halftone dots 20 are irregularly arranged so that the density gradually increases from left to right.

  When a pattern using a conventional AM screen is used, the halftone dots are arranged according to a certain pitch, so that the pattern interferes with a visual expression pattern or microlens described later, resulting in an unintended interference pattern. However, since there is no specific pitch on the FM screen, no interference pattern is generated.

  As the pattern layer 3, a pattern using an opaque or translucent ordinary printing ink can be used. However, when an ink with low transparency is used, using a pattern with a large dot area ratio results in concealing the reflective layer 2, which hinders the expression of an enlarged pattern due to interference.

  Therefore, the pattern layer 3 preferably has a dot area ratio of 30% or more and less than 90%. This is because the reflective layer can be colored without concealing it. If it is less than 30%, the effect of providing the picture layer is not sufficiently obtained, and if it is 90% or more, the reflection layer 2 is concealed. As a result, the reflection of light becomes weak, and the effect of expressing an enlarged pattern due to interference is weakened.

As the resolution of the picture layer 3, 150 DPI (dot per inch) or more is necessary, and preferably about 300 DPI to 2500 DPI. Above 4000 DPI,
There may be a problem with reproducibility.

  If the pattern layer 3 is made of a transparent varnish colored with a transparent pigment or dye, various types of metallic luster can be expressed. For example, when the reflective layer 2 is made of an aluminum foil and the pattern layer 3 is made tan, gold can be expressed. Similarly, when the pattern layer 3 is gray, a stainless steel texture can be given.

  The pattern layer 3 can also be a solid pattern with gradation. Also in this case, the dot area ratio is desirably 30% or more and less than 90%.

  As the visual expression pattern 4, an arbitrary figure such as a circle, a rectangle, a triangle, a heart shape, or a character can be refined and used. The visual expression pattern 4 is printed using a transparent colored ink or an opaque colored ink which is arranged in a dot pattern and is usually used according to a printing method.

  The visual expression pattern 4 does not have to be arranged in an independent dot pattern, but may be a pattern having a constant pitch, for example, a pattern connected like a honeycomb shape.

  The liquid repellent pattern 5 is formed in a pattern shape using an ink having liquid repellency. As the liquid-repellent ink, inks obtained by adding a small amount of silicone oil or silicone resin to normally used inks or varnishes, or inks using silicone resins or fluorine-based resins as binders can be used. Usually, the liquid-repellent pattern is generally colorless and transparent, but may be appropriately colored in order to obtain a design effect. The shape of the liquid repellent pattern 5 is arbitrary, such as a polka dot negative arranged in a regular triangle shape as shown in FIG. 3, a polka dot negative arranged in a square shape, a grid pattern, or a honeycomb shape.

  When a transparent varnish is applied to the surface of the liquid-repellent pattern 5 and repelled along the liquid-repellent pattern, the transparent varnish gathers in the pattern portion of the liquid-repellent pattern and rises in a convex shape to form the microlens 6. The transparent varnish is preferably a resin composition with good transparency that does not contain a filler such as a matting agent and has a high solid content. An ultraviolet curable transparent gloss varnish having a solid content of 100% can be preferably used.

  Although not shown, a transparent layer may be provided between the reflective layer 2 and the pattern layer 3. The transparent layer functions to lengthen the optical path of incident light and reflected light and enhance the stereoscopic effect of the enlarged pattern. As the transparent layer, a transparent resin coating film or a transparent film can be used.

  FIG. 3 is an enlarged plan view illustrating a mechanism in which an enlarged pattern is generated in the decorative body according to the present invention. In this embodiment, the visual expression patterns 4 are circular dots, and are arranged in a regular triangle shape with a constant visual expression pattern pitch 7 (A). A liquid repellent pattern 5 formed from above using liquid repellent ink is provided. The liquid repellent pattern 5 is a negative pattern of circular dots arranged in a regular triangle shape with a constant microlens pitch 8 (B), that is, a patterned pattern, and a transparent varnish applied on the liquid repellent pattern 5 The microlenses 6 are formed by being gathered in a circular dot portion that is bounced and has a punched pattern. The size of the microlens 6 is suitably about 0.05 mm to 0.5 mm.

When the visual expression pattern pitch 7 (A) and the microlens pitch 8 (B) are set to different values, the positions of the dots of the visual expression pattern 4 and the microlens 6 gradually shift, and again at a position shifted by one pitch. Try to match. In the part where both coincide, the center part of the visual expression pattern 4 is enlarged by the micro lens 6, and in the part where both do not coincide, the intermediate part of the visual expression pattern 4 is enlarged by the micro lens 6. In this way, the portion of the visual expression pattern to be enlarged gradually shifts and moves back to the original position at a position shifted by one pitch. As a result of repeated matching and non-matching of the pitch, it is recognized as if the visual expression pattern 4 has been enlarged when viewed with the naked eye. The values of the visual expression pattern pitch 7 (A) and the microlens pitch 8 (B) are preferably about 0.05 mm to 1.0 mm.

  FIG. 4 is an enlarged plan view illustrating a mechanism in which an enlarged pattern is generated in the decorative body according to the present invention, in which the enlargement magnification is lower than that in FIG. As can be seen from the figure, a region 9 where the central portion of the visual expression pattern 4 is enlarged and a region 10 where the middle portion of the visual expression pattern 4 is enlarged appear at regular intervals. This appears as an enlarged pattern and is recognized by the naked eye.

  In the decorative body according to the present invention, only the visual expression pattern pitch 7 (A) and the microlens pitch 8 (B) are changed, and the angle is not changed. It is equal to the angle of the pattern 4, and in the case of FIG. 4, it is a direction inclined by 60 ° to the horizontal direction and to the left and right. In general, the moire pattern that appears when the angle of the pattern is changed appears at an angle different from the angle of the original pattern, so it gives the impression that it appears by chance, and gives a controlled impression. Although not given, the decorative body according to the present invention is characterized in that the enlarged pattern appears in a direction equal to the angle of the pattern, so that the enlarged pattern is precisely controlled.

When the visual expression pattern pitch 7 (A) is smaller than the microlens pitch 8 (B), the enlarged pattern becomes an upright enlarged image in the same direction as the original visual expression pattern 4, but the visual expression pattern pitch 7 When (A) is larger than the microlens pitch 8 (B), an inverted enlarged image in the opposite direction to the original visual expression pattern 4 is obtained.
Hereinafter, specific description will be given based on examples.

  A VM-PET bonded paper obtained by bonding 12 μm thick aluminum vapor-deposited PET to a coated cardboard having a basis weight of 310 g so that the PET surface is in contact with the paper was used as a substrate with a reflective layer. The pattern layer was printed on the surface of the reflective layer by an offset printer. The pattern layer is shaded with FM screen (trade name Staccato, manufactured by Kodak Co., Ltd.). A pattern with a resolution of 2400 DPI is used, with the dot area ratio less than 30% and more than 90% removed. Printing was performed using offset ink. Next, on this, a visual expression pattern of dots as shown in FIG. 3 was printed using red ink by the same offset printer. The dot diameter was 0.2 mm and the pitch was 0.31 mm. Next, a liquid repellent pattern, which is a polka dot pattern, was printed on the ink using a repelling ink in which silicone oil was added to the ink medium. The diameter of the polka dots to be the microlens was 0.3 mm, and the pitch was 0.33 mm. From this, a transparent gloss varnish was applied to the entire surface to form a microlens. The obtained microlens decorative body shows a pattern in which the dot pattern of the visual expression pattern of approximately 5.5 mm pitch arranged regularly is expanded, and the pattern moves by moving the viewpoint, so that a three-dimensional feeling can be expressed. done. Since this microlens decorative body has a pattern layer that does not interfere with the microlens formed by the FM screen, a variety of expressions can be made. In addition, since the surface has fine embossing based on the unevenness of the microlens, the decorative body has a good touch and a high-class feel.

  Using a base material provided with a reflective layer similar to that used in Example 1, a transparent yellow tan varnish was applied to the surface of the reflective layer as a pattern layer with a solid pattern with a dot area ratio of 80%. Produced a decorative body in the same manner as in Example 1. The obtained microlens decorative body was a golden-colored decorative body with no interference pattern between the microlens and the picture layer.

  A coated cardboard having a basis weight of 310 g was used as a base material, and an ink layer containing a silver aluminum powder pigment was provided on the surface by a gravure coating method to form a reflective layer. A PET film having a thickness of 300 μm was laminated thereon, and then a pattern layer was provided by an offset printing machine in the same manner as in Example 1. Further, a square dot visual expression pattern as shown in FIG. Printed. The length of one side of the dot was 0.2 mm, and the pitch was 0.31 mm. Next, a liquid repellent pattern 4 was printed thereon using a repelling ink in which silicone oil was added to the ink medium in the same manner as in Example 1. The diameter of the polka dots to be the microlens was 0.3 mm, and the pitch was 0.33 mm. From this, a transparent gloss varnish was applied to the entire surface to form a microlens. The resulting decorative body displayed a square pattern with an approximately 5.5 mm pitch visual expression pattern that was regularly arranged, and the pattern moved as the viewpoint moved. . Furthermore, since the surface has fine embossing based on the unevenness of the microlens, it is a microlens decorative body having a good touch and a high-class feeling.

In the decorative body having the same configuration as in Example 1, the visual expression pattern was printed so as to be in the range of 7 cm × 7 cm, and the liquid repellent pattern using the repellent ink added with silicone oil was added to the ink medium. A microlens was formed in the same manner as in Example 1 by printing in a 5 cm × 5 cm range smaller than the printing range. In the part where the microlens was formed, an enlarged pattern with movement appeared due to the movement of the viewpoint. By contrast with the part where the microlens did not exist, it became a decorative body with a more three-dimensional feeling and depth.
<Comparative Example 1>

  A microlens decorative body was prepared in the same manner as in Example 1 except that the screen of the pattern layer was a normal 175 line 45 ° AM screen. The resulting decorative body has an interference pattern due to interference with the pattern layer in addition to the visual expression pattern and the enlarged pattern due to interference between the microlenses, resulting in a reduction in the original visual effect and inferior decoration effect. It became.

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Reflective layer 3 ... Pattern layer 4 ... Visual expression pattern 5 ... Liquid repellent pattern 6 ... Micro lens 7 ... Visual expression pattern pitch 8 ... Microlens pitch 9: Area 10 where the central part of the visual expression pattern is enlarged 10: Area 20 where the middle part of the visual expression pattern is enlarged 20: Halftone dot

Claims (2)

A visual expression pattern provided in a pattern with a reflective layer, a pattern layer, and a pitch A on a substrate, and a repellency provided in a pattern at a constant pitch B using a varnish having liquid repellency on the surface of the visual expression pattern. The visual expression pattern is enlarged by having a liquid pattern and a microlens formed on the pattern portion by applying a transparent varnish on the liquid repellent pattern, and making the pitch A and pitch B different. In the microlens decorative body in which the interference pattern is displayed at an equal pitch so as to be viewed three-dimensionally, the picture layer is a transparent pigment shaded by an FM screen having a dot area ratio of 30% or more and less than 90%. A microlens decorative body characterized by a pattern having gradation by a colored transparent varnish using a dye . Resolution of the picture layer, a microlens decorative body of claim 1, wherein less than or 150 DPI 4000 dpi.