WO2011122123A1

WO2011122123A1 - Inkjet printer and printed matter

Info

Publication number: WO2011122123A1
Application number: PCT/JP2011/052732
Authority: WO
Inventors: 山本　隆治; 和司貴船; 政之笹原
Original assignee: 大日本スクリーン製造株式会社
Priority date: 2010-03-31
Filing date: 2011-02-09
Publication date: 2011-10-06

Abstract

Disclosed is an inkjet printer, wherein an image layer (93) that is a multiple view image is formed by applying ultraviolet light to colored ink discharged onto a base material (9) from a colored ink discharge part, and a lens layer (95) that is a lenticular lens is formed on the image layer (93) by applying ultraviolet light to transparent ink discharged onto the image layer (93) from a transparent ink discharge part. The lens layer (95) is provided with a spacer layer (96) with a predetermined thickness, and a microlens layer (97) having a plurality of cylindrical lenses (971). In the formation of printed matter (90) by the inkjet printer, the plurality of cylindrical lenses (971) can be easily focused on the image layer (93) by providing the spacer layer (96) between the microlens layer (97) and the image layer (93). As a result, a visual effect can be easily imparted to an image on the base material (9).

Description

Inkjet printer and printed matter

The present invention relates to an inkjet printer and printed matter.

Conventionally, there is known a printed matter that uses a lenticular lens to give a three-dimensional feeling to an image or that changes an image depending on a viewing angle. Such a printed matter usually has a multi-viewpoint image called a lenticular image printed on the back surface of a hard plate-like lenticular lens, or a plate-like lenticular lens pasted on a multi-viewpoint image printed on a substrate. It is formed by.

International Publication No. 2008/111579 discloses a technique for forming a plate-like lenticular lens by injecting an ultraviolet curable resin between a transparent plate and a mold and curing the resin. Japanese Patent Application Laid-Open No. 2004-317801 discloses a technique for forming a translucent substrate having a lenticular lens on one main surface by injection molding.

In JP-A-11-188866 and JP-A-2007-144635, colored ink is ejected toward a substrate by an ink jet method to form a color image, and then a photocurable transparent ink is ink jetted by an ink jet method. Is disclosed in which a lenticular lens is formed on a colored image by ejecting the liquid. In Japanese Patent Laid-Open No. 11-188866, when forming a plurality of cylindrical lenses of a lenticular lens, based on design information such as the surface shape of each cylindrical lens, transparent ink at each position in the width direction of each cylindrical lens is disclosed. Techniques for changing the number of discharges and the discharge amount have been proposed. In JP 2007-144635 A, when ejecting a transparent ink dot corresponding to each dot of colored ink on a substrate along a plurality of dot rows of colored ink, first, a plurality of colored inks are ejected. Cylindrical adjacent to the lenticular lens by ejecting and curing transparent ink only on dot rows selected every other row of dots, and then curing by ejecting transparent ink on the remaining dot rows A technique for separately forming lenses has been proposed.

On the other hand, Japanese Patent Application Laid-Open No. 2008-44341 relates to a technique for improving the security of printed matter. In Japanese Patent Application Laid-Open No. 2008-44341, an opaque screen pattern is printed with an opaque ink on the main surface of a transparent substrate, a first image is printed on the opaque screen pattern with a transparent ink, and a transparent region other than the opaque screen pattern is printed. A technique for forming a security document by printing a second image with transparent ink is disclosed. When the security document is transparently scanned, the first image on the opaque screen pattern cannot be acquired. When the security document is reflectively scanned, an image in which the first image and the second image overlap is acquired. Thereby, it is difficult to acquire the first image and the second image independently.

By the way, when forming a lenticular lens by an ink jet method using transparent ink as in JP-A-11-188866 and JP-A-2007-144635, fine droplets of transparent ink ejected on an image. Since it spreads to the surroundings before being cured, it is difficult to increase the curvature of the surface of each cylindrical lens, and the focal length is increased, compared to the case where a lenticular lens is formed by injection molding or the like.

In the lenticular lens formed by the apparatus disclosed in JP-A-11-188866, the height of each cylindrical lens is highest at the center in the width direction and zero at both ends in the width direction. The distance up to becomes smaller than the focal length, and the image cannot be seen clearly. Japanese Patent Application Laid-Open No. 11-188866 describes an example in which an image is formed on one main surface of a transparent substrate and a lenticular lens is formed on the other main surface. When sticking on a wall surface or the like, an adhesive or the like is applied on the image, and the image may be stained.

In the lenticular lens formed by the apparatus disclosed in Japanese Patent Application Laid-Open No. 2007-144635, since the transparent ink dot is arranged on each colored ink dot, the surface shape of the lens affects the surface shape of the colored ink dot. Therefore, it is difficult to form a lenticular lens having a desired surface shape. Further, the distance from the lens surface to the image becomes smaller than the focal length, and the image cannot be seen clearly. Furthermore, since it is necessary to accurately eject fine droplets of transparent ink onto the dots of colored ink, highly accurate ejection control is essential, and the manufacturing cost of the apparatus increases.

In recent years, printed materials using lenticular lenses and the like are increasing, and it is also required to prevent unauthorized duplication of such printed materials.

The present invention is directed to an ink jet printer and printed matter, and has an object of easily imparting a visual effect to an image. Another object of the present invention is to improve the reliability of a printed material by preventing copying of a security image in a printed material having a lenticular lens.

In one aspect of the present invention, an inkjet printer includes: a discharge unit that discharges fine droplets of transparent ink toward a substrate; a moving mechanism that relatively moves the discharge unit and the substrate; and the discharge By controlling the curing unit that irradiates the transparent ink applied on the substrate from the unit with radiation to cure the transparent ink, and the discharge unit, the moving mechanism, and the curing unit. A printing control unit that forms a lens layer of the transparent ink on the image layer. The lens layer includes a spacer layer formed with a predetermined film thickness on the image layer, and a plurality of cylindrical lenses arranged in a predetermined arrangement direction and each extending in a direction perpendicular to the arrangement direction. And a microlens layer disposed on the spacer layer. Thereby, a visual effect can be easily given to an image.

In one preferred embodiment of the present invention, the intensity of radiation irradiated from the cured portion when forming the microlens layer is greater than the intensity of radiation irradiated from the cured portion when forming the spacer layer. small.

In another preferred embodiment of the present invention, the spacer layer includes a main body formed on the image layer and a surface layer formed on the main body, and the main body is formed when the surface layer is formed. Radiation is not applied to the transparent ink immediately after being ejected on the top, or radiation is applied from the cured portion with an intensity smaller than the intensity of the radiation applied when forming the main body. Is done.

In still another preferred embodiment of the present invention, the size of the fine droplets of the transparent ink ejected from the ejection unit is changed based on the size and surface shape of the plurality of cylindrical lenses.

In still another preferred embodiment of the present invention, each of the plurality of cylindrical lenses is formed of a plurality of types of micro droplets of the transparent ink.

The transparent ink is preferably a flexible ink. The base material is preferably a flexible plate-like or sheet-like member.

In still another preferred embodiment of the present invention, the image forming apparatus further includes another discharge unit that discharges fine droplets of colored ink toward the substrate to form the image layer.

In another aspect of the present invention, the ink jet printer includes a first discharge unit that discharges fine droplets of colored ink toward the substrate, and a second discharge that discharges fine droplets of transparent ink toward the substrate. Irradiating the transparent ink applied to the substrate from the second ejection unit, a moving mechanism for relatively moving the first ejection unit and the second ejection unit, and the substrate Then, an image layer made of the colored ink is formed on the substrate by controlling the curing unit that cures the transparent ink, the first ejection unit, the second ejection unit, the moving mechanism, and the curing unit. And a print control unit that forms a lens layer of the transparent ink on the image layer. The lens layer is a lenticular lens, and includes a microlens layer having a plurality of cylindrical lenses arranged in a predetermined arrangement direction and extending in a direction perpendicular to the arrangement direction, and at least a part of the plurality of cylindrical lenses Is a security lens used to prevent the image layer from being copied. A security area corresponding to the security lens of the image layer includes a copyable image drawn in a first area visible through the lens layer from a first direction perpendicular to the image layer, and the first area. And a security image drawn in a second region that is visible through the lens layer from a second direction different from the direction.

The present invention is also directed to printed matter.

The above object and other objects, features, aspects, and advantages will become apparent from the following detailed description of the present invention with reference to the accompanying drawings.

1 is a front view of an ink jet printer according to a first embodiment. It is a figure which shows the internal structure of a head unit. It is sectional drawing of printed matter. It is a figure which shows the flow of formation of a lens layer. It is sectional drawing which shows the lens layer in the middle of formation. It is sectional drawing which shows the lens layer in the middle of formation. It is sectional drawing which shows the lens layer in the middle of formation. It is sectional drawing which shows the lens layer in the middle of formation. It is sectional drawing of printed matter. It is sectional drawing of printed matter. It is sectional drawing of printed matter. It is a figure which shows the micro droplet of the transparent ink discharged on the image layer. It is a top view of a multi-viewpoint image. It is a top view of an image. It is a figure which shows the correspondence of a multiview image and a lens layer. It is sectional drawing of printed matter. It is a front view of the inkjet printer which concerns on 2nd Embodiment. It is a front view of the inkjet printer which concerns on 3rd Embodiment. It is a figure which shows the internal structure of a head unit.

FIG. 1 is a front view showing an inkjet printer 1 according to a first embodiment of the present invention. The ink jet printer 1 performs color printing by an ink jet method on a (+ Z) main surface 91 (hereinafter referred to as “upper surface 91”) of a base material 9 which is a flexible plate-like or sheet-like member. It is a device to perform. The base material 9 on which the image is printed is used, for example, for an exhibition for advertising purposes or for wrapping a car body such as an automobile or a train.

As shown in FIG. 1, an inkjet printer 1 includes a holding unit 2 that holds a base material 9, a head unit 3 that discharges micro droplets of ink toward the base material 9, and a head moving mechanism 4 that moves the head unit 3. And a printing control unit 5 for controlling these mechanisms. The head moving mechanism 4 includes a main scanning mechanism 41 that moves the head unit 3 in the X direction, which is the main scanning direction, and a Y direction that is perpendicular to the X direction and horizontal (hereinafter referred to as “sub-scanning direction”). ) Is provided.

FIG. 2 is a diagram showing an internal configuration of the head unit 3. In FIG. 2, the cover 30 of the head unit 3 is drawn with a broken line. The head unit 3 has a discharge unit 31 (hereinafter referred to as “transparent ink discharge unit 31”) that discharges transparent ink microdroplets toward the substrate 9, and colored ink microdroplets toward the substrate 9. Another discharge section 32 (hereinafter referred to as “colored ink discharge section 32”) for discharging, and two curing sections 33 disposed on both sides in the X direction of the transparent ink discharge section 31 and the colored ink discharge section 32 are provided. Prepare. The transparent ink discharge unit 31 is arranged on the (−X) side of the colored ink discharge unit 32 and has a plurality of discharge ports from which transparent ink is discharged.

The colored ink discharge unit 32 includes four discharge mechanisms 32 a to 32 d arranged in the X direction, and each of the discharge mechanisms 32 a to 32 d has a plurality of discharge ports, like the colored ink discharge unit 32. In the colored ink discharge section 32, the discharge mechanism 32a located closest to the (+ X) side in FIG. 2 discharges K (black) colored ink, and the discharge mechanism 32b on the (−X) side of the discharge mechanism 32a uses C ( (Cyan) colored ink is discharged, the (−X) side discharge mechanism 32c of the discharge mechanism 32b discharges M (magenta) color ink, and the (−X) side discharge mechanism 32d of the discharge mechanism 32c is Y ( Yellow) colored ink is ejected.

Transparent ink is radiation curable flexible ink, and colored ink is also radiation curable ink. The curing unit 33 cures the transparent ink and the colored ink by irradiating the transparent ink and the colored ink applied on the substrate 9 from the transparent ink ejection unit 31 and the colored ink ejection unit 32 with radiation. In the present embodiment, ultraviolet curable ink is used as the transparent ink and the colored ink, and ultraviolet rays are emitted from the curing unit 33 as radiation.

When printing is performed on the substrate 9, the colored ink ejection unit 32, the curing unit 33, and the head moving mechanism 4 are controlled by the print control unit 5, and the colored ink ejection unit 32 ejects colored ink (+ X). The colored ink is cured by irradiating the colored ink discharged onto the substrate 9 from the (−X) side curing section 33 that moves continuously in the direction and moves with the colored ink ejection section 32. The colored ink discharge unit 32 moves by a predetermined distance in the (+ Y) direction after reaching the (+ X) side of the base material 9. Subsequently, the colored ink discharge unit 32 continuously moves in the (−X) direction, and the colored ink discharged onto the base material 9 is cured by the ultraviolet rays from the (+ X) side curing unit 33. The colored ink discharge section 32 moves by a predetermined distance in the (+ Y) direction after reaching the (−X) side of the substrate 9. In the ink jet printer 1, the main scanning in the X direction and the sub scanning in the Y direction of the colored ink discharging unit 32 and the curing unit 33 are repeated, and as shown in FIG. Then, an image layer 93 made of colored ink is formed. The image of the image layer 93 is a multi-viewpoint image corresponding to the lens layer 95 that is a lenticular lens. Details of the image on the image layer 93 will be described later.

When the formation of the image layer 93 is completed, the discharge of the colored ink from the colored ink discharge unit 32 shown in FIG. 2 is stopped. Next, the transparent ink discharge unit 31, the curing unit 33, and the head moving mechanism 4 are controlled by the print control unit 5, and the discharge of the transparent ink from the transparent ink discharge unit 31 is started. Then, similarly to the formation of the image layer 93 by the colored ink discharge unit 32, the main scanning in the X direction and the sub scanning in the Y direction of the transparent ink discharging unit 31 and the curing unit 33 are repeated, so that FIG. As shown in FIG. 5, a lens layer 95 made of transparent ink is formed on the image layer 93 on the substrate 9. Thereby, the formation of the printed material 90 including the substrate 9, the image layer 93, and the lens layer 95 is completed.

The lens layer 95 is a lenticular lens having a thickness of about 300 μm, and includes a spacer layer 96 formed on the image layer 93 with a predetermined thickness, and a microlens layer 97 disposed on the spacer layer 96. . The thickness of the spacer layer 96 is approximately uniform over the entire area of the lens layer 95, and is about 150 μm in the present embodiment. The microlens layer 97 includes a plurality of cylindrical lenses 971 arranged in a predetermined arrangement direction (Y direction), and each of the plurality of cylindrical lenses 971 is a convex lens extending in a direction perpendicular to the arrangement direction (X direction). is there. In the printed matter 90, by forming the spacer layer 96, the creation parameters of the microlens layer 97 and the characteristics of the substrate 9 can be handled separately.

Next, a specific example of the process of forming the lens layer 95 will be described with reference to FIG. FIG. A thru | or FIG. D is a cross-sectional view showing the lens layer 95 being formed. In the formation of the lens layer 95, first, fine droplets of transparent ink are applied onto the image layer 93 formed on the substrate 9, and ultraviolet rays are irradiated by the curing unit 33 (see FIG. 2). 5). As shown to A, the main-body part 960 of the spacer layer 96 is formed (step S11). The surface of the main body 960 has irregularities because the center of the position where the fine droplets of the transparent ink have landed rises more than the surroundings. In step S11, in order to make the spacer layer 96 have a predetermined thickness, the transparent ink may be discharged and cured a plurality of times at each position of the image layer 93 as necessary.

Subsequently, the irradiation of ultraviolet rays from the curing unit 33 is stopped, and fine droplets of transparent ink are applied on the main body 960 over almost the entire surface. The fine droplets of transparent ink applied on the main body 960 spread around, and FIG. As shown to B, it flows into the recessed part of the surface of the main-body part 960, and becomes the surface layer 961 of the spacer layer 96 (step S12). The surface of the surface layer 961 is a smooth surface located at the same height from the upper surface 91 of the substrate 9 over the entire surface. Then, the discharge of the transparent ink is stopped, and the surface layer 961 on the main body 960 is cured by irradiating ultraviolet rays from the curing unit 33, so that the spacer layer 96 having a smooth surface and a substantially uniform film thickness is formed on the image layer 93. (Step S13). In step S12, the transparent ink applied on the main body 960 is not irradiated with ultraviolet rays from the curing unit 33, but the strength is small enough that the fluidity of the transparent ink is not lost (that is, the main body 960). The ultraviolet ray may be irradiated at an intensity smaller than the intensity of the ultraviolet ray irradiated when the is formed.

Next, in the transparent ink discharge section 31 (see FIG. 2), one or a plurality of discharge openings corresponding to one cylindrical lens 971 (see FIG. 3) is set as a discharge opening group, and the (−Y The head unit 3 is main-scanned in a state where the discharge of the transparent ink from the even-numbered discharge port group is stopped while discharging the transparent ink from the odd-numbered discharge port group from the side. Then, the transparent ink applied on the spacer layer 96 from the odd-numbered ejection port group is irradiated with ultraviolet rays from the curing unit 33, and thus FIG. As shown in C, a plurality of cylindrical lenses 971 extending in the main scanning direction (X direction) are formed (step S14). The plurality of cylindrical lenses 971 are arranged in the Y direction while being separated from each other, and the distance in the Y direction between two adjacent cylindrical lenses 971 (that is, the distance in the Y direction of the region where the spacer layer 96 is exposed) is: It is approximately equal to the width of the cylindrical lens 971 in the Y direction.

In step S14, since the intensity of the ultraviolet rays irradiated from the curing unit 33 is smaller than the intensity of the ultraviolet rays irradiated from the curing unit 33 when the main body 960 of the spacer layer 96 is formed, the ultraviolet rays are discharged onto the spacer layer 96. The resulting transparent ink is cured to some extent but has fluidity (hereinafter referred to as “semi-cured state”). For this reason, a plurality of dots of transparent ink arranged in the X direction in an area corresponding to one cylindrical lens 971 are combined (that is, they become familiar with adjacent dots). Thereby, the surface of the cylindrical lens 971 is prevented from being uneven in the X direction, which is the longitudinal direction of the cylindrical lens 971, and becomes a smooth curved surface. Further, since the dots of the semi-cured transparent ink spread in the Y direction, the width in the Y direction of the fine droplets of the transparent ink ejected from the transparent ink ejection unit 31 is made smaller than the design width of the cylindrical lens 971. The In the present embodiment, the intensity of the ultraviolet light irradiated from the curing part 33 in step S14 is about 5% to 20% (more preferably) of the intensity of the ultraviolet light irradiated from the curing part 33 when the spacer layer 96 is formed. Is about 5% to 10%).

When the surface shape of the cylindrical lens 971 becomes a desired shape, the head unit 3 is scanned in a state where the discharge of the transparent ink from the transparent ink discharge unit 31 is stopped, and the cylindrical lens 971 in a semi-cured state is scanned from the curing unit 33. Ultraviolet rays are irradiated and the cylindrical lens 971 is cured (step S15). In step S15, the intensity of the ultraviolet ray irradiated from the curing unit 33 is larger than the intensity of the ultraviolet ray in step S14, and is equal to the intensity of the ultraviolet ray when the spacer layer 96 is formed. In the inkjet printer 1, steps S14 and S15 may be repeated a plurality of times as necessary in order to make the cylindrical lens 971 have a predetermined thickness.

Subsequently, the transparent ink discharge unit 31 switches the discharge port group for discharging the transparent ink (steps S16 and S17). That is, the discharge of the transparent ink from the odd-numbered discharge port group from the (−Y) side is stopped, and the discharge of the transparent ink is started from the even-numbered discharge port group. Then, returning to step S14, the second steps S14 and S15 are performed, so that FIG. As shown in D, a plurality of cylindrical lenses 971 are formed on the spacer layer 96 between the plurality of cylindrical lenses 971 formed in the first steps S14 and S15, and the formation of the microlens layer 97 is completed ( That is, the formation of the lens layer 95 is completed.) (Steps S14 to S16). The cylindrical lens 971 formed at the second time is in contact with the adjacent cylindrical lens 971 formed at the first time in the Y direction.

As described above, in the formation of the printed matter 90 by the inkjet printer 1, the spacer layer 96 is provided between the microlens layer 97 and the image layer 93, whereby the surface of the plurality of cylindrical lenses 971 and the image layer 93 are formed. By increasing the distance in the thickness direction therebetween, the plurality of cylindrical lenses 971 of the microlens layer 97 can be easily focused on the image layer 93. Thereby, the image of the image layer 93 can be clearly seen through the lens layer 95. Further, by forming the microlens layer 97 on the surface of the smooth spacer layer 96, a lenticular lens having a plurality of cylindrical lenses 971 having a desired surface shape without being affected by the surface shape of the image layer 93 (that is, The lens layer 95) can be easily formed. As a result, it is possible to easily impart to the image on the substrate 9 a visual effect such as imparting a stereoscopic effect to the image or changing the image depending on the viewing angle.

In the formation of the printed matter 90 by the ink jet printer 1, the intensity of ultraviolet rays irradiated from the curing portion 33 when forming the microlens layer 97 is irradiated from the curing portion 33 when forming the main body portion 960 of the spacer layer 96. Less than the intensity of ultraviolet light. Thereby, the surface of the cylindrical lens 971 is prevented from being uneven in the longitudinal direction, and the uniformity of the height of the cylindrical lens 971 in the longitudinal direction is improved. Further, when the surface layer 961 of the spacer layer 96 is formed, the transparent ink immediately after being discharged onto the main body 960 of the spacer layer 96 is not irradiated with ultraviolet rays (or the main body 960 is formed). In this case, the thickness of the spacer layer 96 can be made constant with high accuracy. As a result, the cylindrical lens 971 can be easily formed. Furthermore, the visual effect imparted to the image on the substrate 9 can be improved.

In the formation of the spacer layer 96 of the lens layer 95, the surface layer 961 may be omitted as long as the surface can be made approximately smooth when forming the main body 960. In this case, the intensity of the ultraviolet ray irradiated from the curing unit 33 when forming the microlens layer 97 is set smaller than the intensity of the ultraviolet ray irradiated from the curing unit 33 when forming the spacer layer 96.

As described above, in the inkjet printer 1, the microlens layer 97 and the spacer layer 96 of the lens layer 95 can be easily formed using transparent ink. For this reason, the ink jet printer 1 is used for forming the lens layer 95 on various base materials 9. In particular, it is relatively difficult to form a lenticular lens by other methods, and has a flexible plate shape. Or, it is particularly suitable for forming the lens layer 95 on the sheet-like substrate 9. Further, since the transparent ink used for forming the lens layer 95 is a flexible ink, it is possible to suppress the deformation of the base material 9 from being inhibited by the lens layer 95. Therefore, the ink jet printer 1 is particularly suitable for forming the lens layer 95 on the thin sheet-like (that is, film-like) base material 9 that is easily deformed as used for wrapping a car body such as an automobile or a train.

In the inkjet printer 1, colored ink is ejected from the head unit 3 to form the image layer 93 on the substrate 9, and transparent ink is ejected from the head unit 3 to form the lens layer 95. For this reason, when the lens layer 95 is formed, the image layer 93 on the substrate 9 and the transparent ink ejection part 31 of the head unit 3 can be easily aligned with high accuracy. As a result, the positioning of the lens layer 95 with respect to the image layer 93 is realized easily and with high accuracy.

By the way, when the microlens layer 97 is formed in the inkjet printer 1, the transparent ink discharge unit 31 is moved by the print control unit 5 based on the size (width and height) and the surface shape of the plurality of cylindrical lenses 971. The size of the fine droplets of transparent ink ejected from the transparent ink ejection unit 31 is controlled and changed. FIG. A thru | or FIG. C is a cross-sectional view showing the size and surface shape of the cylindrical lens 971 when the size of the fine droplets of transparent ink is changed. FIG. A thru | or FIG. In C, the parallel droplets are not attached to the fine droplet 99 (the same applies to FIG. 7). FIG. A thru | or FIG. C shows that the discharge port group corresponding to one cylindrical lens 971 includes three discharge ports, and one cylindrical lens indicated by a broken line is represented by three minute droplets 99 indicated by a solid line in the drawing. 971 is formed.

Figure 6. A thru | or FIG. In each example shown in C, FIG. A micro droplet 99 is the smallest, FIG. The C micro-droplet 99 is the largest. For this reason, FIG. The cylindrical lens 971 of A is the smallest (that is, the height from the image layer 93 is low), and the curvature at the center in the Y direction that is the width direction is also the smallest. On the other hand, FIG. The C cylindrical lens 971 is the largest, and the curvature at the center in the Y direction is the largest. In this way, by changing the size of the microdroplet of the transparent ink based on the size and surface shape of the plurality of cylindrical lenses 971, various characteristics (for example, different widths and curvatures, different focal lengths) are obtained. The cylindrical lens 971 can be easily formed.

Figure 6. A thru | or FIG. In the example shown in FIG. 7C, each cylindrical lens 971 is formed by a minute droplet 99 of transparent ink having the same size. However, each cylindrical lens 971 has a plurality of types of transparent ink as shown in FIG. It may be formed by a micro droplet. In FIG. 7, micro droplets 99a to 99c of transparent inks having different sizes ejected at respective positions on the image layer 93 are drawn in a circle. Actually, these micro droplets 99a to 99c are combined to form a cylindrical lens 971 having a surface shape indicated by a broken line. In the inkjet printer 1, when forming the cylindrical lens 971, the

small droplets

99 a and 99 b of the transparent ink ejected to a position close to the planned position to be the surface of the cylindrical lens 971 are reduced so that the surface of the cylindrical lens 971 By enlarging the small droplets 99c of the transparent ink ejected to a position far from the planned position, the number of transparent ink microdroplets necessary for forming each cylindrical lens 971 can be increased without significantly increasing the number of the transparent ink. The lens 971 can be formed with high shape accuracy.

Figure 8. A and FIG. B is a diagram for explaining a multi-viewpoint image 94 of the image layer 93 (see FIG. 3). FIG. A is a plan view showing a multi-viewpoint image 94. FIG. The multi-viewpoint image 94 is shown in FIG. Each of the three types of

images

94a, 94b, and 94c shown in FIG. B is divided into a plurality of strip-shaped

partial images

941a, 941b, and 941c arranged in the Y direction, and a portion between each two adjacent partial images 941a is divided. The

images

941b and 941c are formed one by one. In other words, the multi-viewpoint image 94 includes a plurality of

partial images

941a, 941b, and 941c arranged in order in the Y direction.

FIG. 9 is a diagram showing a correspondence relationship between the multi-viewpoint image 94 of the image layer 93 and the cylindrical lens 971 of the lens layer 95. In the printed material 90, each one of the regions 930 (regions corresponding to the respective cylindrical lenses 971, hereinafter referred to as “microlens corresponding regions 930”) of the image layer 93 that are visible through the respective cylindrical lenses 971. Two

partial images

941a, 941b, and 941c are sequentially arranged from the (+ Y) side.

In the printed matter 90, when the microlens corresponding region 930 is viewed through the cylindrical lens 971 from a direction perpendicular to the image layer 93 (a direction denoted by reference numeral D1 in FIG. 9 and hereinafter referred to as “direction D1”), Of the

partial images

941a, 941b, and 941c drawn in the lens corresponding region 930, the central partial image 941b can be seen. That is, among the

regions

931a, 931b, and 931c obtained by dividing the microlens corresponding region 930 into three in the Y direction, the central region 931b on which the partial image 941b is drawn is a region that can be viewed through the lens layer 95 from the direction D1. is there.

In addition, the direction D2 is different from the direction D1 (in this embodiment, the (−Y) direction and the (−Z) direction) and the direction parallel to the YZ plane, and the angle between the direction D1 is 30 degrees. .) From the microlens corresponding region 930 through the cylindrical lens 971, a partial image 941c on the most (−Y) side can be seen. The most (−Y) side region 931c of the microlens corresponding region 930 is a region that can be visually recognized through the lens layer 95 from the direction D2.

Further, the direction D3 is different from the directions D1 and D2 (in this embodiment, the direction is parallel to the YZ plane facing the (+ Y) direction and the (−Z) direction), and the angle between the direction D1 is 30 degrees. From the above, when viewing the microlens corresponding region 930 through the cylindrical lens 971, the partial image 941a on the most (+ Y) side can be seen. The most (+ Y) side region 931a of the microlens corresponding region 930 is a region that is visible through the lens layer 95 from the direction D3.

Therefore, when the printed matter 90 is viewed from the direction D1, only the image 94b (see FIG. 8B) drawn in the region 931b of the plurality of microlens corresponding regions 930 is seen through the lens layer 95, and the

other images

94a and 94c are displayed. (See Figure 8.B) is not visible. Further, when the printed material 90 is viewed from the direction D2, only the image 94c drawn in the region 931c of the plurality of microlens corresponding regions 930 is seen through the lens layer 95, and when the printed material 90 is viewed from the direction D3, the plurality of microlenses is viewed. Only the image 94 a drawn in the area 931 a of the corresponding area 930 is visible through the lens layer 95.

In the printed matter 90, the image 94c is a security image for preventing copying, and the image 94b is a copyable image that causes no problem even if copied. When the printed material 90 is copied by a copying machine or the like, the light from the light source in the copying machine is only incident on the lens layer 95 of the printed material 90 from the direction D1 and emitted in the direction opposite to the direction D1 by the scanner unit. Received light. Therefore, the image that can be received by the scanner unit is only the copyable image 94b that is visible when the printed matter 90 is viewed from the direction D1. Accordingly, only the copyable image 94b is copied on the copy sheet or the like, and the security image 94c is not copied.

As described above, in the inkjet printer 1, by providing the lens layer 95 on the image layer 93 on which the multi-viewpoint image 94 including the security image 94 c is drawn in the printed material 90, the security image 94 c is prevented from being copied and the printed material 90. Can be prevented and the reliability of the printed matter 90 can be improved. In the inkjet printer 1, all the cylindrical lenses 971 in the lens layer 95 are security lenses that are used for preventing copying of the image layer 93. In the image layer 93, all the microlens corresponding regions 930 corresponding to these cylindrical lenses 971 are used. Is a security area.

In the printed matter 90, as shown in FIG. 3, by providing a spacer layer 96 between the microlens layer 97 and the image layer 93, the thickness direction between the surface of the plurality of cylindrical lenses 971 and the image layer 93 is increased. The distance can be increased, and the plurality of cylindrical lenses 971 of the microlens layer 97 can be easily focused on the image layer 93. Thereby, the multi-viewpoint image 94 (see FIG. 8.A) of the image layer 93 can be clearly seen through the lens layer 95. Further, by forming the microlens layer 97 on the surface of the smooth spacer layer 96, the lens layer 95 having a plurality of cylindrical lenses 971 having a desired surface shape can be obtained without being affected by the surface shape of the image layer 93. It can be formed easily. As a result, a visual effect can be easily imparted to the image on the substrate 9. Furthermore, since the lens layer 95 is a lenticular lens, various visual effects such as giving a stereoscopic effect to the image or making the image different depending on the viewing angle can be given to the image on the substrate 9.

In the inkjet printer 1, all the cylindrical lenses 971 in the microlens layer 97 do not necessarily need to be security lenses, and at least some of the plurality of cylindrical lenses 971 may be security lenses. For example, in the printed matter 90a shown in FIG. 10, three cylindrical lenses (reference numeral 971a) which are a part of the plurality of cylindrical lenses 971 are security lenses, and the widths of the three cylindrical lenses 971a are cylindrical lenses. It is larger than the width of each of the other cylindrical lenses 971 excluding 971a. Actually, there are more cylindrical lenses 971a used as security lenses.

In the printed material 90a, the microlens corresponding region 930 corresponding to each cylindrical lens 971 in the image layer 93 is divided into three

regions

931d, 931e, and 931f as in the printed material 90 (see FIG. 9), and partial images of three types of images. 941d, 941e, and 941f are drawn in

areas

931d, 931e, and 931f, respectively. These three types of images do not include security information. On the other hand, the microlens corresponding region 930a (that is, the security region) corresponding to each cylindrical lens 971a of the image layer 93 includes

regions

931d, 931e, and 931f, and (+ Y) side and (−Y) side of these three regions. Are divided into five

areas

931g and 931h.

Partial images

941d, 941e, and 941f are drawn in the

regions

931d, 931e, and 931f, respectively, and

partial images

941g and 941h of two types of images including security information are drawn in the

regions

931g and 931h, respectively.

The

regions

931d, 931e, and 931f are regions that are visible through the lens layer 95 from the directions D3, D1, and D2, respectively. The region 931h is a direction D4 different from the directions D1 to D3 (in this embodiment, the (−Y) direction and the (−Z) direction parallel to the YZ plane), and the angle with the direction D1 is The region 931g is visible through the lens layer 95. The region 931g is a direction D5 (in the present embodiment, the (+ Y) direction and the (−Z) direction) different from the directions D1 to D4. Is an area that is parallel to the YZ plane that faces the direction D1, and an angle between the direction D1 and the direction D1 is 60 degrees.

For this reason, when the printed matter 90 is viewed from the direction D1 perpendicular to the image layer 93, only the image that is a set of the partial images 941e drawn in the region 931e can be seen through the lens layer 95. The image is a copyable image that can be copied without any problem. When the printed matter 90 is viewed from the directions D2 and D3, only images that are sets of

partial images

941f and 941d can be seen through the lens layer 95, respectively. Further, when the printed material 90 is viewed from the directions D4 and D5, only the security images that are a set of the

partial images

941h and 941g can be seen through the lens layer 95, respectively. Therefore, when the printed matter 90 is copied by a copying machine or the like, only a copyable image that is a set of partial images 941e is copied on a copy sheet or the like, and a security image is not copied.

In the printed matter 90a, similarly to the printed matter 90, the lens layer 95 is provided on the image layer 93 on which the multi-viewpoint image 94 including the security information is drawn, thereby preventing the copy of the security image and improving the security of the printed matter 90a. be able to. Further, by making the width of the cylindrical lens 971a, which is a security lens, larger than the width of other cylindrical lenses 971, the number of partial images drawn in the security area is increased, and the entire printed matter 90a is visible. A security image can be embedded in the multi-viewpoint image 94 without reducing the number of images (three images corresponding to the

partial images

941d, 941e, and 941f).

In the inkjet printer 1, the width of the cylindrical lens 971 a that is a security lens is made equal to that of the other cylindrical lens 971, and the curvature of the cylindrical lens 971 a (that is, the curvature at the center in the width direction) is made different from the curvature of the other cylindrical lens 971. May be. In addition, it is not necessary to use the entire plurality of selected cylindrical lenses as security lenses. For example, in the circular region at the center of the lens layer 95 in a plan view, the curvature of the cylindrical lens 971 is changed to that of the cylindrical lens 971 outside the circular region. By making it different from the curvature, the circular area may be a security lens.

In this way, by making the width or curvature of the security lens that is a part of the plurality of cylindrical lenses 971 different from the width or curvature of the other cylindrical lenses 971, the image drawn in the security area corresponding to the security lens is changed. The appearance and the appearance of the image drawn in the microlens corresponding area 930 corresponding to the other cylindrical lens 971 can be easily made different. As a result, when viewing the printed matter 90a, the security image drawn in the security area can be easily identified.

Next, an ink jet printer according to a second embodiment of the present invention will be described. FIG. 11 is a front view showing an inkjet printer 1a according to the second embodiment. In the ink jet printer 1a, the sub scanning mechanism for moving the head unit 3 in the Y direction, which is the sub scanning direction, from the ink jet printer 1 shown in FIG. ) Side) is provided with a holding unit moving mechanism 45 that moves the holding unit 2 in the sub-scanning direction. The other configuration of the inkjet printer 1a is the same as that of the inkjet printer 1 shown in FIGS. 1 and 2, and the same reference numerals are given to the corresponding configurations in the following description.

In the formation of the image layer 93 and the lens layer 95 (see FIG. 3) by the ink jet printer 1a, the base material 9 is replaced by the holding unit 2 in place of the sub-scan of the head unit 3 performed for each main scan of the head unit 3. At the same time, it is moved in the sub-scanning direction by a predetermined distance. Other operations are the same as those in the first embodiment. In the inkjet printer 1a, as in the first embodiment, the lens layer 95 including the spacer layer 96 and the microlens layer 97 (see FIG. 3) is formed on the image layer 93 on the substrate 9, thereby A visual effect can be easily imparted to the image on the substrate 9. Further, by providing the lens layer 95 on the image layer 93 on which the multi-viewpoint image 94 (see FIG. 8.A) including security information is drawn on the printed matter 90, the security of the printed matter 90 is prevented by preventing the copying of the security image. Can be improved.

Next, an ink jet printer according to a third embodiment of the present invention will be described. FIG. 12 is a front view showing an inkjet printer 1b according to the third embodiment. The ink jet printer 1b includes a head unit 3a, a feed mechanism 4a that moves the base material 9 in the (−X) direction below the head unit 3a (on the (−Z) side), and a print control unit 5.

The feeding mechanism 4 a has two belt rollers 47 connected to a motor (not shown) and a belt 48 hung between the two belt rollers 47. Further, on the (+ X) side and the (−Z) side of the feed mechanism 4a, a supply unit 61 that holds the roll-shaped base material 9 (supply roll) is provided, and the (−X) side and (( On the −Z) side, a winding unit 62 for holding the roll-shaped substrate 9 (winding roll) is provided. The base material 9 drawn out from the supply unit 61 is held on the belt 48 which is a holding unit, passes along with the belt 48 below the head unit 3a, moves to the (−X) side, and takes up the winding unit 62. It is wound up by. In the following description, the term “base material 9” refers to a part in the middle of conveyance (that is, a part of the base material 9 on the belt 48).

FIG. 13 is a diagram showing an internal configuration of the head unit 3a. In FIG. 13, the cover 30 of the head unit 3a is drawn with a broken line. A colored ink discharge section 32 having four discharge mechanisms 32a to 32d is arranged on the most (+ X) side of the head unit 3a, and on the (−X) side of the colored ink discharge section 32, a curing section that emits ultraviolet rays. 33a is arranged. Four transparent ink ejection portions 31a to 31d are arranged on the (−X) side of the curing portion 33a, and on each (−X) side of the transparent ink ejection portions 31a to 31d, the curing portions 33b to 33b that emit ultraviolet rays. 33g is arranged. The four ejection mechanisms 32a to 32d, the transparent ink ejection units 31a to 31d, and the curing units 33a to 33g of the colored ink ejection unit 32 extend over the entire width of the substrate 9 (that is, over the entire length in the Y direction). The colored ink and the transparent ink are ejected and irradiated with ultraviolet rays over the entire width of the base material 9 that passes below the head unit 3a.

Since the formation process of the printed matter 90 (see FIG. 3) by the inkjet printer 1b is substantially the same as that of the first embodiment, hereinafter, FIG. A thru | or FIG. The formation process will be described with reference to D. In the following description, attention will be paid to a part of the base material 9, and processing for the part will be described in order. In the ink jet printer 1b, first, colored ink is ejected from the colored ink ejection unit 32 onto the substrate 9 moving in the (−X) direction, and the colored ink is cured by irradiating the colored ink with ultraviolet rays from the curing unit 33a. Thus, the image layer 93 (see FIG. 5.A) is formed. Subsequently, the transparent ink is ejected from the transparent ink ejecting portion 31a onto the image layer 93, and the transparent ink is cured by the ultraviolet rays irradiated from the curing portion 33b to form the main body portion 960 of the spacer layer 96 (FIG. 5). A).

Next, transparent ink is ejected from the transparent ink ejection part 31b onto the main body part 960. In the head unit 3, since the distance in the X direction between the transparent ink discharge portion 31b and the curing portion 33c is relatively large, the transparent ink applied on the main body portion 960 is exposed to the surroundings before being cured by being irradiated with ultraviolet rays. And flows into the recesses on the surface of the main body 960 to form the surface layer 961. Thereafter, the surface layer 961 is cured by irradiation with ultraviolet rays from the cured portion 33c, and a spacer layer 96 (see FIG. 5.B) having a smooth surface and a substantially uniform film thickness is formed.

When the spacer layer 96 is formed, transparent ink is ejected from the transparent ink ejection part 31c, and relatively weak intensity (5% to 10% of the intensity of ultraviolet rays from the curing

parts

33b, 33c, 33e, 33g). In this case, a plurality of semi-cured cylindrical lenses 971 (see FIG. 5.C) arranged in every other line are formed. Then, the semi-cured cylindrical lens 971 is cured by irradiating the semi-cured cylindrical lens 971 with ultraviolet light at a normal intensity from the cured portion 33e.

Subsequently, the transparent ink is ejected from the transparent ink ejection part 31d between the already formed cylindrical lenses 971, and has a relatively weak intensity from the curing part 33f (intensity equal to the intensity of ultraviolet rays from the curing part 33). A plurality of cylindrical lenses 971 (see FIG. 5.D) in a semi-cured state are formed by ultraviolet rays. Then, these cylindrical lenses 971 are cured by the normal intensity ultraviolet rays from the curing portion 33g, and the formation of the microlens layer 97 is completed (that is, the formation of the lens layer 95 is completed).

As described above, in the inkjet printer 1b, the colored ink ejection unit 32 and the transparent ink ejection units 31a to 31d move to positions on the substrate 9 by one movement of the substrate 9 in the (−X) direction. Passing only once completes printing on the substrate 9. That is, printing (so-called one-pass printing) that does not involve movement of the head unit 3a and the base material 9 in the Y direction is performed. In the inkjet printer 1b, as in the first embodiment, the lens layer 95 including the spacer layer 96 and the microlens layer 97 is formed on the image layer 93 on the substrate 9 to thereby form the substrate 9 on the substrate 9. A visual effect can be easily given to an image. Further, by providing the lens layer 95 on the image layer 93 on which the multi-viewpoint image 94 including security information is drawn on the printed matter 90, the security image can be prevented from being copied and the security of the printed matter 90 can be improved.

As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

For example, in the formation of the spacer layer 96 of the lens layer 95, the surface layer 961 may be omitted if the surface can be made substantially smooth when the main body 960 is formed. In this case, the intensity of the ultraviolet ray irradiated from the curing unit 33 when forming the microlens layer 97 is set smaller than the intensity of the ultraviolet ray irradiated from the curing unit 33 when forming the spacer layer 96.

The transparent ink and the colored ink may be, for example, ink that is cured by irradiation with visible light (photons) or ink that is cured by irradiation with electron beams (electrons). That is, various inks may be used as long as they can be quickly cured by irradiation with radiation such as electromagnetic waves or particle beams. Further, the colored ink ejection unit 32 may eject ink of a color other than black, cyan, magenta, and yellow (for example, light cyan, light magenta, white).

In the ink jet printer, the head unit and the base material 9 may be relatively moved by various types of moving mechanisms. In other words, at least one of the head unit and the substrate 9 may be moved relative to the other. In the inkjet printer 1 described above, the head moving mechanism 4 that moves the head unit 3 in the X direction and the Y direction corresponds to the moving mechanism. In the inkjet printer 1a, the head moving mechanism 4 that moves the head unit 3 in the X direction and the holding unit moving mechanism 45 that moves the base material 9 in the Y direction together with the holding unit 2 correspond to the moving mechanism described above. In the printer 1b, the feeding mechanism 4a that moves the base material 9 in the X direction corresponds to the moving mechanism.

Inkjet printers are particularly suitable for printing on sheet-like or plate-like flexible substrates made of paper, cloth, plastics, etc., but other substrates (for example, glass or metal) It may be used for forming the image layer 93 and the lens layer 95 on the plate material to be formed. In the ink jet printer, the colored ink ejection unit may be omitted from the head unit, and only the lens layer 95 may be formed. In this case, the image layer 93 is formed on the substrate 9 by another printing apparatus, and the lens layer 95 is formed after the image layer 93 and the head unit are aligned by the ink jet printer.

Although the present invention has been described in detail, the above description is illustrative and not restrictive. Therefore, it will be understood that many variations and embodiments are possible without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1, 1a, 1b Inkjet printer 4 Head moving mechanism 4a Feed mechanism 5 Print control part 9

Base material

31,31a-31d Transparent ink discharge part 32 Colored

ink discharge part

33, 33a-33g Curing part 41 Main scanning mechanism 42 Sub scanning mechanism 45 Holding

part moving mechanism

90, 90a Printed material 93 Image layer 94a Image

94b Copyable image

94c Security image 95 Lens layer 96 Spacer layer 97

Micro lens layer

99, 99a to

99c Micro droplet

930, 930a Micro lens corresponding region 931a to 931h region 941a to 941h

Partial images

971 and 971a Cylindrical lenses D1 to D5 directions S11 to S17 Steps

Claims

An inkjet printer (1, 1a, 1b),
Discharge portions (31, 31a to 31d) for discharging fine droplets (99, 99a to 99c) of transparent ink toward the base material (9);
A moving mechanism (4, 4a, 45) for relatively moving the discharge section (31, 31a to 31d) and the base material (9);
A curing unit (33, 33a to 33g) for irradiating the transparent ink applied on the substrate (9) from the discharge unit (31, 31a to 31d) to cure the transparent ink;
By controlling the discharge part (31, 31a to 31d), the moving mechanism (4, 4a, 45) and the curing part (33, 33a to 33g), the image layer (93 on the substrate (9) is controlled. ) A print control unit (5) for forming a lens layer (95) with the transparent ink thereon,
With
The lens layer (95)
A spacer layer (96) formed with a predetermined film thickness on the image layer (93);
A microlens layer (97) having a plurality of cylindrical lenses (971, 971a) arranged in a predetermined arrangement direction and extending in a direction perpendicular to the arrangement direction, and arranged on the spacer layer (96) When,
Is a lenticular lens.
An inkjet printer (1, 1a, 1b) according to claim 1,
When the microlens layer (97) is formed, the intensity of the radiation irradiated from the cured portions (33, 33a to 33g) is such that the cured portions (33, 33a to 33g) are formed when the spacer layer (96) is formed. 33g) is less than the intensity of radiation irradiated.
An inkjet printer (1, 1a, 1b) according to claim 1,
The spacer layer (96),
A main body formed on the image layer (93);
A surface layer formed on the main body,
With
When forming the surface layer, the transparent ink immediately after being discharged onto the main body is not irradiated with radiation, or more than the intensity of the radiation irradiated when forming the main body. Radiation is irradiated from the cured portion (33, 33a to 33g) with a small intensity.
An inkjet printer (1, 1a, 1b) according to claim 1,
Based on the size and surface shape of the plurality of cylindrical lenses (971, 971a), the size of the fine droplets (99, 99a-99c) of the transparent ink ejected from the ejection sections (31, 31a-31d). Is changed.
An inkjet printer (1, 1a, 1b) according to claim 1,
Each of the plurality of cylindrical lenses (971, 971a) is formed of a plurality of types of micro droplets (99, 99a to 99c) of the transparent ink.
An inkjet printer (1, 1a, 1b) according to claim 1,
The transparent ink is a flexible ink.
An inkjet printer (1, 1a, 1b) according to claim 1,
The base material (9) is a flexible plate-like or sheet-like member.
An inkjet printer (1, 1a, 1b) according to claim 1,
It further includes another discharge part (32) for discharging fine droplets of colored ink toward the substrate (9) to form the image layer (93).
An inkjet printer (1, 1a, 1b),
A first discharge section (32) for discharging fine droplets of colored ink toward the substrate (9);
A second ejection section (31, 31a to 31d) for ejecting transparent ink micro droplets (99, 99a to 99c) toward the substrate (9);
A moving mechanism (4, 4a, 45) for relatively moving the first discharge part (32) and the second discharge part (31, 31a to 31d) and the base material (9);
A curing unit (33, 33a to 33g) for irradiating the transparent ink applied on the substrate (9) from the second ejection unit (31, 31a to 31d) to cure the transparent ink;
By controlling the first discharge part (32), the second discharge part (31, 31a to 31d), the moving mechanism (4, 4a, 45) and the curing part (33, 33a to 33g), A printing control unit (5) that forms an image layer (93) made of the colored ink on the substrate (9) and forms a lens layer (95) made of the transparent ink on the image layer (93);
With
The lens layer (95) is a lenticular lens, and includes a microlens layer (97) having a plurality of cylindrical lenses (971, 971a) arranged in a predetermined arrangement direction and extending in a direction perpendicular to the arrangement direction. Prepared,
At least a part of the plurality of cylindrical lenses (971, 971a) is a security lens used for preventing copy of the image layer (93),
A security area corresponding to the security lens of the image layer (93) is
A copyable image (94b) drawn in a first region visible through the lens layer (95) from a first direction perpendicular to the image layer (93);
A security image (94c) drawn in a second region visible through the lens layer (95) from a second direction different from the first direction;
Is provided.
An ink jet printer (1, 1a, 1b) according to claim 9,
The lens layer (95) further includes a spacer layer (96) formed with a predetermined film thickness between the image layer (93) and the microlens layer (97).
Printed matter (90, 90a),
A substrate (9);
An image layer (93) formed on the substrate (9);
A lens layer (95) formed on the image layer (93) by curing the fine droplets (99, 99a to 99c) of the radiation curable transparent ink discharged on the substrate (9); ,
With
The lens layer (95)
A spacer layer (96) formed with a predetermined film thickness on the image layer (93);
A microlens layer (97) having a plurality of cylindrical lenses (971, 971a) arranged in a predetermined arrangement direction and extending in a direction perpendicular to the arrangement direction, and arranged on the spacer layer (96) When,
Is a lenticular lens.
The printed matter (90, 90a) according to claim 11,
The transparent ink is a flexible ink.
The printed matter (90, 90a) according to claim 11,
The base material (9) is a flexible plate-like or sheet-like member.
Printed matter (90, 90a),
A substrate (9);
An image layer (93) formed by discharging fine droplets of the colored ink on the substrate (9);
A lens layer (95) formed on the image layer (93) by curing the fine droplets (99, 99a to 99c) of the radiation curable transparent ink discharged on the substrate (9); ,
With
The lens layer (95) is a lenticular lens, and includes a microlens layer (97) having a plurality of cylindrical lenses (971, 971a) arranged in a predetermined arrangement direction and extending in a direction perpendicular to the arrangement direction. Prepared,
At least a part of the plurality of cylindrical lenses (971, 971a) is a security lens used for preventing copy of the image layer (93),
A security area corresponding to the security lens of the image layer (93) is
A copyable image (94b) drawn in a first region (931b) visible from the first direction perpendicular to the image layer (93) through the lens layer (95);
A security image (94c) drawn in a second region (931c) visible through the lens layer (95) from a second direction different from the first direction;
Is provided.
The printed matter (90, 90a) according to claim 14,
The lens layer (95) further includes a spacer layer (96) formed with a predetermined film thickness between the image layer (93) and the microlens layer (97).
The printed matter (90, 90a) according to claim 14,
The security lens is a part of the plurality of cylindrical lenses (971, 971a);
The width or curvature radius of the security lens is different from the width or curvature radius of other cylindrical lenses excluding the security lens.
The printed matter (90, 90a) according to claim 16,
The width of the security lens is larger than the width of other cylindrical lenses excluding the security lens,
The area of the image layer (93) corresponding to the security lens is
A first image drawn in a region visible from the first direction through the lens layer (95) and including the copyable image (94b);
A second image which is the security image (94c);
A third image (94a) drawn in a region (931a) visible through the lens layer (95) from a third direction different from the first direction and the second direction;
Is provided.