JP2013178364A - Image recording medium, and manufacturing method of medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent optical characteristics from changing at a portion impregnated with a material liquid.SOLUTION: An image recording medium 1 comprises lens formation areas 28 that are each specified by a pair of protrusions 26 extending linearly on the surface of a substrate layer 20, and protrusions 27 formed on a wall on the opposite side of at least one of the lens formation areas 28 specified by the protrusions 26 on the substrate layer 20.

Description

  The present invention relates to an image recording medium and a method for manufacturing the medium.

  An imaging unit that forms an image on the print medium PA, and a lens formation unit that forms a lenticular lens LS on the print medium PA on which the image is formed. The lens formation unit preferably prints the lenticular lens LS A technique of forming in a partial region RG of the medium PA is disclosed in Patent Document 1.

JP 2009-116139 A

  As a method of forming a lenticular lens, a plurality of straight grooves are cut in parallel on the base, and partition walls are formed on both sides of each groove (double partition walls). There is a method in which a liquid lenticular lens material is poured and solidified. If there is too much liquid material in this method, the following situation occurs. That is, the material liquid flows over the top of the formed double partition wall, and the material liquid penetrates into the groove between the two partition walls of one double partition wall. When such a situation occurs, the optical characteristics change at the portion where the material liquid has permeated.

  The invention according to claim 1 is an image recording medium, which is a plurality of lens forming regions defined on the surface of the substrate layer, and each lens forming region includes a pair of convex portions extending linearly. A substrate layer having a lens forming region to be defined; and a convex portion is formed on a wall opposite to the lens forming region of at least one of the convex portions of the substrate layer. .

  A second aspect of the present invention is the image recording medium according to the first aspect, wherein the convex portion formed on the wall of the convex portion is higher than half of the height from the top portion to the bottom portion of the convex portion. It is supposed to be formed at a position.

  The invention according to claim 3 is a method of manufacturing an image recording medium, comprising a blade that cuts a groove extending in a predetermined cutting direction on the surface of the substrate layer and forms convex portions on both sides of the groove. The blade is provided with a surface having an angle with respect to the cutting direction, and a cutting unit having a second blade protruding on the surface is used, and the surface of the substrate layer is fixed by the cutting unit. By cutting in the direction, the surface of the substrate layer is a convex portion that extends linearly, and a convex portion is formed on the wall on one side thereof.

According to the first aspect of the present invention, it is possible to suppress the change in optical characteristics caused by the intrusion of the liquid material between the partition walls at the time of manufacture, compared to the case where there is no convex portion formed on the wall of the convex portion. .
According to the invention described in claim 2, it is possible to further suppress the change in the optical characteristics caused by the intrusion of the liquid material between the partition walls at the time of manufacture, as compared with the case where this configuration is not provided.

  According to invention of Claim 3, the shape of the convex part which prevents that a liquid material permeates between partition walls can be obtained by one-time cutting.

It is a perspective view showing the example of the image recording medium based on this Embodiment. It is sectional drawing showing the example of the image recording medium which concerns on this Embodiment. 1 is a block diagram illustrating a schematic example of a medium forming apparatus that manufactures an image recording medium according to an embodiment. 4 is a flowchart showing an example of a manufacturing process of the image recording medium according to the present embodiment. It is explanatory drawing showing the example of the cutting process part used with the example of the manufacturing method of the image recording medium which concerns on this Embodiment. It is explanatory drawing showing the cross section in the manufacture process of the image recording medium which concerns on this Embodiment. It is explanatory drawing showing the effect | action of the convex part formed in the image recording medium based on this Embodiment. It is explanatory drawing showing the other example of the cutting part used in the example of the manufacturing method of the image recording medium which concerns on this Embodiment.

  Embodiments of the present invention will be described with reference to the drawings. As illustrated in FIG. 1, the image recording medium 1 according to the present embodiment includes a first medium 11 and a second medium 12 that are stacked on each other. Here, an image including a lenticular image is formed on at least the surface of the first medium 11 on the side where the second medium 12 is disposed.

  Here, since the lenticular image is widely known, a simple explanation will be given. A plurality of n types of images V1, V2,... , V i, 1, V i, 1,..., And a set of strip-shaped image portions cut out from the images V 1 to Vn. (Direction perpendicular to each other). That is, they are sequentially arranged as V1,1, V2,1,... Vn, 1, V1,2, V2,2,.

  The second medium 12 has a three-dimensional region 21 formed on the substrate layer 20. Here, the substrate layer 20 is formed by forming a light-transmitting resin such as amorphous polyethylene terephthalate (A-PET) or other transparent material into a flat plate shape. The surface of the substrate layer 20 is a substantially smooth surface. Further, the substrate layer 20 transmits the image of the corresponding portion (the portion immediately below) on the first medium 11 as it is.

  The three-dimensional region 21 is a region in which a lens that refracts and transmits an image of a corresponding portion on the first medium 11 using the same material as the substrate layer 20 is formed. Specifically, this lens is an array of lenticular lenses, and as shown in FIG. 2, a plurality of lenticular lenses 25, which are semicylindrical (cylindrical) convex portions, are arranged in parallel to each other. .

  Next, a method for manufacturing the image recording medium 1 will be described. Specifically, the image recording medium 1 may be formed as follows using the medium forming apparatus 30 illustrated in FIG. As illustrated in FIG. 3, the medium forming apparatus 30 includes a stage 31, a cutting unit 32, a resin discharge unit 33, a light irradiation unit 34, and a control unit 35.

  Here, the stage 31 includes a plane that supports the workpiece W to be processed. The cutting unit 32 forms a groove on the surface of the second medium 12 placed on the stage 31 in accordance with an instruction input from the control unit 35. The operation of the cutting unit 32 will be described later.

  In accordance with an instruction input from the control unit 35, the resin discharge unit 33 discharges a liquid photo-curing resin (transparent resin material) to an instructed position on the medium surface placed on the stage 31. Since such a resin discharge part 33 can employ | adopt a widely known thing, the detailed description is abbreviate | omitted. The light irradiation unit 34 emits light (for example, ultraviolet light) having a wavelength that cures the resin discharged by the resin discharge unit 33.

  The control unit 35 includes a microcomputer and operates according to a program stored in the storage unit. The program may be provided by being stored in a computer-readable recording medium such as a CD-ROM (Compact Disc Read Only Memory) and stored in a storage unit in the microcomputer. In the present embodiment, the control unit 35 controls the cutting unit 32 and the resin discharge unit 33. Details of the control by the control unit 35 will be described below with reference to FIG.

  In the present embodiment, it is assumed that the second medium 12 is formed on the sheet-like first medium 11 on which a lenticular image is formed in advance. That is, the first medium 11 is first guided and arranged on the stage 31. The control unit 35 controls the resin discharge unit 33 to discharge the resin substantially uniformly onto the first medium 11. Further, the control unit 35 controls the light irradiation unit 34 to irradiate the applied resin with light to solidify the discharged resin.

  Thereby, the substrate layer 20 which is a resin layer having a substantially uniform thickness is formed on the first medium 11 (S1). In the present embodiment, the substrate layer 20 is subjected to a well-known surface processing treatment, and irregularities such that the N-point average height Rz is 1 μm ≦ Rz are formed on the surface. Also good.

  Next, the control unit 35 controls the cutting unit 32 so that the surface of the substrate layer 20 corresponding to the lenticular image of the first medium 11 (the portion where the lenticular image is located immediately below) is included in the lenticular image. A groove extending in the longitudinal direction (Y-axis direction) of the image portion is formed. In an example of the present embodiment, the cutting unit 32 includes a cutting head H having a blade in the Y-axis direction.

  In the present embodiment, the cutting head H includes a base portion 41 and a blade portion 42 as illustrated in FIG. A second blade portion 43 is provided on each side surface of the blade portion 42. Specifically, the second blade portion 43 is provided at a position at least higher than D from the blade edge with respect to the cutting depth D into the base portion 41 of the blade portion 42. Desirably, the 2nd blade part 43 is provided in the position of 1.2D to 1.4D from a blade edge. When the cutting depth D is made equal to the blade span height h, the position of the second blade portion 43 is provided at a position higher than h from the blade edge, preferably 1.2 h to 1.4 h. Further, it is desirable that the second blade portion 43 is disposed in the vicinity of the end opposite to the cutting direction so that the partition wall is easily raised.

  The control unit 35 moves the cutting head H of the cutting unit 32 to a position on one end side in the X-axis direction of the lenticular image formed on the first medium 11. Then, the cutting head H is lowered toward the substrate layer 20, and the blade layer 42 of the cutting head H is lowered to a predetermined depth (a depth at which the second blade portion 43 does not reach the surface of the substrate layer 20). Prick into 20 surfaces.

  Next, the control unit 35 cuts the surface of the substrate layer 20 while moving the cutting unit 32 in the Y-axis direction to form grooves on the surface of the substrate layer 20 over the length of the lenticular image in the Y-axis direction. To do.

  At this time, the blade portion 42 of the cutting head H advances in the cutting direction while cleaving the surface of the substrate layer 20 to the left and right with respect to the cutting direction at the end in the cutting direction. At this time, a groove is formed by cleaving the surface, and convex portions 26 are formed on both sides of the groove. Further, the second blade portion 43 comes into contact with the groove side wall surface of the formed convex portion 26 as the blade portion 42 advances, and further grooves are formed on the groove side wall surface of the convex portion 26. It becomes. Also at this time, the second blade portion 43 advances while cleaving the groove side wall surface of the convex portion 26 to the left and right with respect to the cutting direction, and forms the convex portions 27 on both sides of the groove.

  In addition, since the 2nd blade part 43 is provided in the position at least higher than D from the blade edge | tip with respect to the cutting depth D to the base 41 of the blade part 42 here, from the top part of the convex-shaped part 26 to the bottom part ( The convex portion 27 is formed at a position higher than half of the height to the tip of the groove.

  The cross section of the groove on the surface of the substrate layer 20 formed in this way is basically M-shaped by two convex portions 26 and a groove sandwiched between them as shown in FIG. Further, an M-shaped portion including another pair of convex portions 27 and a groove sandwiched between them is formed on the side surface of the convex portion 26 on the groove side by cutting with the second blade portion 43. Is formed.

  Next, the control unit 35 moves the cutting head H in the X-axis direction by the width of the n strip-shaped image portions included in the lenticular image (by the predetermined lens pitch), and again the cutting head. H is cut while moving in the Y-axis direction to form grooves on the surface of the substrate layer 20 over the length of the lenticular image in the Y-axis direction. This lens pitch is set in advance as about 250 μm, for example. Hereinafter, the control unit 35 controls the cutting unit 32 to move in the X-axis direction by the lens pitch width and cut in the Y-axis direction until a groove is formed on the other end side of the lenticular image. .

  In this way, a plurality of convex portions 26 having the convex portions 27 as shown in FIG. 6A are formed on the surface of the substrate layer 20. Further, a lens forming region 28 having a lens pitch width is formed on the side of the convex portion 26 other than the groove side.

  That is, the surface of the substrate layer 20 is defined by a pair of convex portions 26 that extend in a straight line as shown in FIG. A lens forming region 28 is provided, and a convex portion 27 is formed on the wall of the convex portion 26 opposite to the lens forming region 28. (S2 in FIG. 4).

  The control unit 35 controls the resin discharge unit 33 to position the discharge port in the formed lens formation region 28 and discharge the resin while moving in the Y-axis direction over the longitudinal direction (S3 in FIG. 4). . The contact angle at the top of the convex portion 26 of the discharged resin is increased by the angle between the angle parallel to the surface and the groove formed by cutting, so that the cross-section is formed in a semicircular shape. Go up and form a semi-cylindrical shape having a longitudinal direction in the Y-axis direction.

  If unevenness is formed on the surface of the substrate layer 20 at this time, the wettability on the surface is improved as compared with the case where there is no unevenness, so that the flow in the Y-axis direction is further suppressed. At this time, the resin of the same material as that of the substrate layer 20 also enters the concave portion on the surface of the substrate layer 20.

  When a semi-cylindrical resin having a desired length is discharged in the length direction of the groove, the control unit 35 causes the resin discharge unit 33 to stop discharging the resin. At this time, when the resin discharge amount is larger than the planned amount and exceeds the top of the convex portion 26, as shown in FIG. 7, the convex portion 26 is opposite to the lens forming region 28. Since the contact angle θ of the resin is further increased at the top of the convex portion 27 provided on the wall surface, the resin is prevented from entering the groove formed by cutting.

  Thereafter, the control unit 35 moves the resin discharge unit 33 by the width between the boundary partition walls in the X-axis direction, and again in the region surrounded by the boundary partition wall and the convex portion 26 at the position after the movement, The process of discharging the resin while moving the resin discharge portion 33 in the longitudinal direction in the longitudinal direction is repeated to form a three-dimensional region (lenticular lens) 21 at a position corresponding to the lenticular image on the substrate layer 20 (FIG. 4 S4).

  The control unit 35 turns on the light irradiation unit 34 and applies light emitted from the light irradiation unit 34 to the resin discharged by the resin discharge unit 33. This accelerates the curing of the resin and completes the formation of the lenticular lens.

  In the case where irregularities are formed on the surface of the substrate layer 20, the method is, for example, a depth shallower than the depth of the groove of the boundary partition wall to be formed later in the direction intersecting the Y-axis direction that is the longitudinal direction of the boundary partition wall. The groove may be formed by cutting before the boundary partition wall is formed.

  Moreover, in this embodiment, the 2nd blade part 43 provided in the blade part 42 is not restricted to the shape illustrated in FIG. The second blade portion 43 illustrated in FIG. 5 has a cone shape. However, the present invention is not limited thereto, and a plurality of second blade portions 43 are provided on the side surface of the blade portion 42 as illustrated in FIG. It may be arranged (a plurality of cone shapes) (FIG. 8A), or may be a triangular prism having a longitudinal direction in the cutting direction (FIG. 8B). Further, in any case, it is arranged in the vicinity of the rear end portion with respect to the cutting direction of the blade portion 42, so that the second blade portion 43 hits the portion where the cut portion is sufficiently formed and the convex portion 26 is formed. It may be.

  Furthermore, in another example of the present embodiment, at least a part of the side surface of the blade portion 42 may be a random unevenness (file shape). Also in this case, the file-like portion may be disposed in the vicinity of the rear end portion with respect to the cutting direction of the blade portion 42.

  In the case of a file shape, a plurality of convex portions 27 are formed on the groove-side wall surface of the convex portion 26. Furthermore, in the above description, the convex portion 27 is formed by cutting once by adjusting the shape of the blade portion 42. However, the image recording medium 1 of the present embodiment is based on this method. First, for example, the convex portion 26 that does not particularly process the wall surface on the groove side is formed, and then the groove side (the lens forming region 28 and the lens portion 28) of the convex portion 26 is separately obtained by surface treatment such as cutting, laser processing, or sandblasting. May be uneven on the wall on the opposite side.

  Further, in the above description, the cutting unit 32 includes the single blade part 42, but the cutting unit 32 may include a plurality of blade parts 42 arranged in the X-axis direction. Thus, a plurality of convex portions 26 and convex portions 27 may be formed at a time.

  In the image recording medium 1 of the present embodiment, since the resin does not penetrate into unintended grooves at the time of manufacture, the optical characteristics can be stabilized.

  DESCRIPTION OF SYMBOLS 1 Image recording medium, 11 1st medium, 12 2nd medium, 20 Substrate layer, 25 Lenticular lens, 26 Convex part, 27 Convex part, 28 Lens formation area, 30 Medium formation apparatus, 31 Stage, 32 Cutting part, 33 resin discharge part, 34 light irradiation part, 35 control part, 41 base part, 42 blade part, 43 2nd blade part.

Claims (3)

A plurality of lens forming regions defined on the surface of the substrate layer, each lens forming region comprising a substrate layer having a lens forming region defined by a pair of convex portions extending linearly;
An image recording medium, wherein a convex portion is formed on a wall of the substrate layer opposite to at least one lens forming region of the convex portion.   The image recording medium according to claim 1, wherein the convex portion formed on the wall of the convex portion is formed at a position higher than half of the height from the top to the bottom of the convex portion. Cutting a groove extending in a constant cutting direction on the surface of the substrate layer, and a blade that forms convex portions on both sides of the groove, the blade includes a surface having an angle with respect to the cutting direction, Using a cutting means having a second blade protruding on the surface,
By cutting the surface of the substrate layer in the predetermined direction by the cutting means, a convex portion that extends linearly is formed on the surface of the substrate layer, and a convex portion is formed on the wall on one side thereof. A method for manufacturing an image recording medium.

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