KR101632231B1 - The inlay sheets for visual effects - Google Patents

Abstract

The present invention is an inlay sheet having a visual special effect, which solves the problems caused in the bonding process and the constituent method of causing the convex lens array to exhibit the focal length and visual effect together with the elements mounted on the smart card and the inlay coil, Can be combined with high-quality card production and advanced application technology only by the conventional post-processing, and can be applied to a thin film type stereoscopic image card and a mobile transmission / reception system because it is utilized as a module that is combined with mass production, Beyond the smart card, visual security identification can be completely confirmed, so that the application field can be widely applied.

Description

&Quot; THE INLAY SHEETS FOR VISUAL EFFECTS "

The present invention relates to a smart chip, an antenna coil, and an optical display method for non-contact type information input / output, and is constructed of an inlay sheet for visual special effects designed in conjunction with a mobile communication technology, 'Production.

Inlay sheets that are commonly used are mainly used for smart cards, but they are expected to be used for personal information sharing due to the development of mobile technology. In addition, it is expected that it will develop gradually in various sizes and uses beyond the standard of credit card. (Ex: financial card + mobile phone skin, accessory, text, business card, electronic product surface case, Verification device)

Therefore, 'inlay sheet', which is mainly used to make these products, has a structure in which a 'IC chip' and an 'Athena coil' each having a thickness of about 0.2 mm are connected to each other, Plastic sheet 'so as to be integrally formed in a state of a sheet having a thickness of about 0.3 to 0.5 mm.

The inlay process technology includes 'etching method' which melts and attaches an antenna copper wire, 'printing method' which attaches a copper wire to a coating type, and there is a method of cutting an PVC using ultrasound and attaching a copper wire thereon.

The 'smart card inlay sheet' is typically formed by laminating a sheet and a magnetic sheet printed on the top and bottom surfaces of the inlay sheet, respectively, and thermally bonding the 'RF card' and the 'combination card' And so on.

In recent years, however, various cards of various functions and various companies have been made in smart cards. There is no big difference in the visual value of the products compared to their functions and values. In accordance with the desire of differentiation and merchandise It can also be a factor that can not go.

Accordingly, the present invention relates to the development of a special 'inlay sheet' having security, functionality, and surface decorating effects in the production of a 'smart card' or a 'smart product'.

Generally, a credit card is a type of card in which a magnetic device is first adopted due to the development of technology. Recently, various chips and devices are mounted on a card, Credit card function is supported. Furthermore, there are credit cards in which display (LED, sound, etc.) devices are mounted so that various information embedded in the chip and a user can confirm differentiation.

Accordingly, the present invention relates to a related art such as the above-described prior arts of Patent No. 10-0544300 'stereoscopic plastic card and its manufacturing method' and patent No. 10-0841438 'plane lens sheet for printing using a light beam' To create more differentiated products in the environment, and to solve the problems in applying visual special effects in the production of smart cards or smart inlays.

That is, the sheet having the visual special effect of the present invention is a technique using a convex lens array, and a stereoscopic effect and a motion graphic effect can be used. The element mounted on the card and the convex lens array constituted together with the in- Distance, and visual effects, and to a configuration requirement for an international standard card thickness and a method of making an inlay sheet for mass production.

In the production of the inlay sheet according to the present invention, the characteristics of the characteristic visual special effects are applied to the product and the inner inlay sheet, and the credit card or product manufacturer adds the design in the post- And an inlay sheet which can be easily produced in mass production.

However, some problems arise in this process because of the following reasons.

Typically manufactured credit cards are made with a thickness of about 0.8 mm, and the inlay sheet applied inside the card is made by thermocompression with a plastic sheet of about 0.35 mm thickness. In order to apply the above visual special effect (three-dimensional sheet) to the upper part of the inlay sheet, a printing sheet (about 0.15 mm) and a magnetic sheet thickness (about 0.05 mm) It should be manufactured within the available range. Therefore, it is very easy to make a general three-dimensional lens sheet together with the design print sheet to have a thickness of about 0.25 mm and adhere to the top of the inlay sheet.

However, in this case, since the surface of the card is formed of a convex lens array, the surface of the card is made of an embossed surface, so that it looks like a matte surface with no gloss so that it interferes with a clear color, hinders a luxurious texture, Problem 1 ' that reduces the completeness.

Therefore, in order to solve such a problem, a special coating is required so that the surface of the lens sheet is made of a glossy surface. In this case, the thickness of the three-dimensional lens sheet, which is generally required, It is inevitable that there will be a 'problem 2' that is thicker than the international standard.

Of course, in this case, it is possible to make the radius of curvature of the convex lens three times smaller. However, in such a case, it is impossible to print for stereoscopic expression or be manufactured by a special technique (such as a photolithography technique) If it does, there will be a 'problem 3' to create a closed society without realism.

Therefore, it is desirable that the thickness of the three-dimensional inlay sheet suitable for mass production and having a glossy surface is about 0.35 mm to 0.5 mm, which is a necessary requirement for the next step of the product manufacturer, This is a previous step process requirement for 'additional process' to produce the right product.

Therefore, for example, if the thickness of the processable sheet (about 0.3 mm to 0.45 mm thick) required by the card maker is sufficient, the usable thickness of the three-dimensional sheet at the top of the inlay sheet is only about 0.25 mm at most. As a result, a convex lens array of a minimum size array applied to this thickness is required, that is, a lens array having a pattern pitch of a very sophisticated operation having a diameter of about 50 mu m or less and a convex lens size larger than about 500 lpi is required, The pattern design and printing suitable for this lens array should be capable of line printing of 1um or less. That is, it is a difficult method to apply to general printing techniques suitable for mass production.

In addition, due to the characteristics of the product manufactured by the hot press process as a three-dimensional smart product, if a component having a different physical property (metal) is partially inserted into the laminate structure and molded by heat pressing, another serious problem 4 .

In the conventional stereoscopic expression using a convex lens array (a flat lens sheet for printing using a beam speed of Patent No. 10-0841438), the material constituting the convex lens layer to the stereoscopic print layer (focal distance) is made of only a plastic material, There is no big problem in the process of integrating the same material or similar transparent sheet materials. However, due to the nature of the manufacturing process of the inlay sheet, a physical phenomenon occurs in which the plastic sheet is melted and re-formed by heat in the mold frame during the process of pressurization and integration, and a component having different physical properties (inlay coil, IC device, etc.) A difference in pressure is produced, and the arrangement of patterns by stereoscopic printing is finely collapsed around a component having a different physical property, so that a minute physical change is generated as a clogging which greatly hinders the visual effect.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an image forming apparatus capable of meeting the international standard of a credit card, capable of maintaining a luxurious glossy surface and capable of being manufactured without physical or visual deformation, Smart cards, and smart products. The inlay sheet can be manufactured to facilitate mass production of smart cards and smart products.

In the inlay sheet used in a smart card (credit card, ID card or the like) having a visual special effect of the present invention or a smart product, the inlay sheet is made of a transparent plastic material molded by a hot press, A 'lens layer' formed of convex lenses whose curvature radius is 1/6 or less of the thickness 't2' of the inlay sheet 1;

A 'coil layer' made of a transparent plastic material at the lower end thereof and configured to insert an antenna coil or (and) element between or between one or three layer sheets or on a surface thereof;

A concavo-convex pattern made of a transparent plastic material at its lower end and formed by a hot press on the lowermost side has the same pattern arrangement tendency corresponding to the above-mentioned 'lens layer', and the concavo- A concavo-convex pattern layer on which a printing film 32 is formed;

2.5t₁ 이고 약 0.25mm ∼ 0.65mm미만으로 일체화됨을 특징으로 하는 '인레이 시트'(1)에 의해 달성 될수 있는 것이다.The "lens layer" and the "coil layer" and "concave-convex pattern layer, are laminated, by a multilayer thickness (t2) is at least 2.5 times the focal length (t1) of the positive lens, t ₂

₁ &_lt; / RTI > of ₁ and less than about 0.25 mm to less than 0.65 mm.

The present invention is an inlay sheet including a visual special effect. It is designed to allow a card maker to combine high-quality card production and advanced application technology with a simple post-process, and is utilized as a module suitable for mass production. It is possible to apply the mobile transmission / reception system, and it is possible to check the visual security gap completely beyond the advanced smart card, so that its application field can be widely applied.

1 is an enlarged cross-sectional view illustrating an embodiment of the present invention;
2 is an enlarged cross-sectional view illustrating a hot press die and a laminated structure in a process according to an embodiment of the present invention.
3 is an enlarged cross-sectional view illustrating a structure in which lamination and bonding are completed in a process according to an embodiment of the present invention.
4-1 is an enlarged cross-sectional view illustrating a laminated structure of a coil layer according to an embodiment of the present invention.
4-2 is an enlarged cross-sectional view illustrating a laminated structure of a coil layer according to an embodiment of the present invention.
5 is an enlarged cross-sectional view illustrating a laminated structure of an inlay sheet according to an embodiment of the present invention and a structure to be further laminated in a subsequent subsequent process.
6 is an enlarged cross-sectional view illustrating a laminated structure of an inlay sheet according to an embodiment of the present invention and a structure to be further laminated in a subsequent subsequent process.
FIG. 7 is a plan view illustrating an embodiment of an inlay sheet according to an embodiment of the present invention, in which an antenna coil and an LED element are mounted. FIG.
FIG. 8 is an enlarged cross-sectional view illustrating a mount of an inlay sheet, an antenna coil, and an LED element according to an embodiment of the present invention and a stacked structure thereof.
FIG. 9 is an enlarged cross-sectional view illustrating a light path of an LED light source and a path of a totally reflected light in a laminate structure in which an inlay sheet, an antenna coil, and LED elements are mounted according to an embodiment of the present invention.
FIG. 10 is an enlarged view illustrating that an ultraviolet curing type lens layer and a concavo-convex pattern layer are formed on the upper and lower surfaces of the coil layer according to the instant embodiment of the present invention, respectively.
11 is an enlarged cross-sectional view illustrating a configuration of an inlay sheet having a partial special effect according to a temporary example of the present invention.

The present invention will now be described in more detail with reference to the drawings by taking the structural characteristics and the above problems caused by the hot pressing process.

With reference to the manufacturing method of the above-mentioned three-dimensional credit card of the prior art (Patent No. 10-0544300), in this case, the prepared inlay sheet is made of a colored plastic sheet having a certain thickness and in which an antenna coil or element is inserted And is a structure in which a three-dimensional printed sheet is laminated on an inlay sheet prepared as described above. The structure of the three-dimensional printed sheet to be laminated is a structure in which a convex lens and a three-dimensional pattern print are formed on the bottom surface of a transparent sheet having a thickness for maintaining a focal distance.

That is, since the inlay sheet that has already undergone the primary thermal bonding forming process is used in a flat sheet state of a constant thickness, the above-described molding process is a secondary molding process, so that the array of three- And the pattern arrangement was collapsed and the three-dimensional effect was not damaged.

Therefore, the structural features of the present invention which are compared with each other will be described with reference to the drawings illustrated in Figs. 1 to 4-2.

The inlay sheet 1 of the present invention is made of a transparent plastic material and has a thickness less than about 0.25 to 0.65 mm. At the top of the inlay sheet 1, a lens layer 10 formed of a convex lens array with a predetermined size and pattern arrangement is formed. The lens layer 10 is formed by a convex lens mold plate 500 according to the hot press working process of FIG. 2 . The radius of curvature of each formed convex lens 11 is less than 1/6 of the thickness t2 of the inlay sheet 1 and the focal distance t1 of the convex lens 11 is equal to the thickness of the inlay sheet 1, t2 < 2 >.

For example, if the thickness of the inlay sheet 1 required by the user is required to be about 0.3 mm, the radius of curvature r of the convex lenses 11 should be made about 0.05 mm or less, and the focal length 't1' mm or less. This is formed on the upper surface of the transparent layer sheet 100 constituting the lens layer 10 as illustrated in Fig. That is, the transparent layer sheet 100 is formed into the lens layer 10 through a manufacturing process.

A coil layer 20 is formed on the lower end of the lens layer 10. The configuration of the coil layer 20 may be slightly different depending on the kind of the card, the purpose and the purpose. That is, in the case of the credit card combination card illustrated in FIG. 4-1, the antenna coil 22 may be inserted into a single layer sheet 301, or the two layer sheets 201 And 301 are inserted into the antenna coil 22. In the case of the RF card, as shown in FIGS. 1 to 3, the RF chip 21 is inserted into the perforated space by perforating the RF chip 21 in accordance with the size and shape of the RF chip 21 on the two layer sheets 200 and 300 And the antenna coil 22 is inserted between the two layer sheets 200 and 300 to be connected to the RF chip 21. The coil layer 20 of the present invention does not limit the number of layers of the formed layer sheet but only one to three layers constituting the coil layer 20 The inlay coil 22 or the element 21 is inserted between the layer sheets or on the surface thereof so that it can be prepared differently depending on the characteristics of the element or the purpose and purpose of the inlay sheet.

As the type of the element 21 used in the coil layer 20 in the present invention, an IC element (COB, RF element, NFC element), an LED element, a display element, a flash memory element, 21 may be used for non-contact signal detection and wireless power supply.

The concavo-convex pattern layer 30 is formed on the lower end of the coil layer 20. The concavo-convex pattern layer 30 is formed on the lowermost side of the convexo-concave pattern layer 30 by a convex- And the concavo-convex pattern 31 has the same pattern arrangement tendency corresponding to the lens layer 10.

2, the lens layer 10, the coil layer 20, and the concavo-convex pattern layer 30 are formed between the convex lens mold plate 500 and the concavo-convex pattern mold 600, The layer sheet 100, the coil layer sheet 200, 300 or 201, 301, the antenna coil 22 or the element 21, and the concavo-convex pattern layer sheet 400 are laminated, And the cooling process, the pressurization is released as shown in the drawing of FIG. 3, and the molding operation of the inlay sheet made of one sheet is completed.

In this case, the arrangement of the concavo-convex pattern 31 is not limited to the above-mentioned problems, and in the case of the print pattern, there is no problem in that the pattern arrangement printed with the plastic resin finely flows along with the plastic resin during the pressure- Do. The reason for this is that even though the plastic resin melts and flows finely due to the pressure difference between the antenna coil 22 made of the other material and the element 21 in the hot press forming process, And the molding is completed by the mold frame in the concavity and convexity pattern mold 600. That is, even if the resin melts, there is no ink in the printed pattern array.

Therefore, the outline pattern 31 is difficult to express the contour of the three-dimensional pattern, so that the printing process for displaying the contour is preferably performed after the hot press forming process. As a printing method, it is preferable to express the print film 32 by forming the print film 32 on the surface of the uneven pattern 31 selectively. In accordance with the printing method, the thin film printing 33 is selectively performed by vapor deposition, , Refraction coating liquid application and the like, it is possible to express a clean and clear outline of the fine pattern.

FIG. 5 is a view illustrating an embodiment of the present invention. FIG. 5 illustrates a configuration and a post-process of completing a product using the inlay sheet 1 according to a user.

A front design sheet 700 having a front design print 701 is formed on an upper portion of the inlay sheet 1 of the present invention and a rear design sheet 800 having a back design print 801 formed below the inlay sheet 1 A thin overlay sheet 802 and a mark netted tape 900 are stacked. Design printing is mainly used in an offset printing method for mass production. The printing sheet is made of a sheet having a thickness of 0.1 mm or more.

Therefore, a result that a total of about 0.3 mm to 0.4 mm or more is laminated on the upper and lower portions of the inlay sheet 1. It is natural that the adhesive or the refractory resin 15 or the like optionally used for adhesion durability is further thickened as the need arises so as to additionally constitute the top and bottom surfaces of the inlay sheet 1, respectively. The laminated structures are integrally joined to each other by a hot press process, or they are completed by bonding with a roll press.

2.5t₁ 이고 약 0.25mm ∼ 0.65mm미만으로 일체화됨이 바람직하다.The adhesive or refractory resin 15 selectively used on the top of the inlay sheet 1 is made of a transparent material and is made of a synthetic resin having a necessary refractive index according to the correlation between the radius of curvature of the convex lens 11 and the thickness of the inlay sheet . For example, if it is assumed that the refractive index of the convex lens is n = 1.6, it is preferable that the refractive index of the adhesive agent and / or the refractive resin 15 is formed of a low refractive material of 1.5 or less. The refractive index of the refraction resin 15 is 1.25 or less in consideration of economical efficiency and productivity. The refractive index of the refraction resin 15 is preferably 1.25 To 1.49 and the refractive index of the convex lens 11 is 1.5 to 1.62 or less so that the thickness of the inlay sheet 1 is t ₂

2.5t &_lt; / RTI > and less than about 0.25mm to less than 0.65mm.

However, since a product having an international standard thickness of about 0.8 mm is required for a credit card, it is necessary that the thickness of the inlay sheet 1 of the present invention and the thickness of a component to be further laminated in a user's post-process are set to a minimum thickness. For example, assuming that the thickness of the provided inlay sheet 1 is 0.6 mm, the structure of the front design sheet 700 of the product, the structure of the rear design sheet 800, and the necessary constituent magnetic tape 900 together It can not be finished to a thickness of 0.8 mm.

As a result, as described above, sheets of 0.1 mm or more are mainly used because printing is difficult with a sheet having a thickness of 0.1 mm or less due to characteristics of a printing method. Even if thickness factors such as a magnetic tape 900 and printing and adhesive are excluded, Is at least 0.84 mm or more, so that it will be out of international standards.

Accordingly, this can be solved by the illustrated embodiment of FIG. The front design print 701 is formed on the lower surface of the lens layer 10 described above to replace the lamination of the additional front design sheet 700. [

Further, as the material for bonding durability (adhesive, printing film, refractory resin 15, etc.) is additionally formed, the thickening gradually becomes insensitive. Therefore, there is no problem when the inlay sheet 1 is about 0.4 mm, If the thickness of the element 21 to be inserted into the inlay sheet 1 is to be increased, a method of reducing the thickness even by 0.1 mm is desperately needed. This is because the front design print 701 It is possible to form the front design print 701 on the lower surface of the print layer 10 constituting the inlay sheet 1 in place of the method of constructing the printed front design sheet 700, Instead of using a thick printed sheet, a minimum thickness of about 0.025 mm thick sheet can be used, which can be reduced by at least about 0.1 mm.

However, in the above description, in the thermal press process in which the inks printed with the fine pattern are integrated with the inlay sheet, the fine flow is caused to flow around the components 21 and 22 made of the other materials. In this case, However, since the front design print 701 of the present invention is not a printing for a three-dimensional effect, the front design print 701 of the present invention is not a three-dimensional effect printing It does not appear to be enlarged by the convex lens 11 and is not a fine pattern print, so that it can not be observed with the naked eye, so there is no need to worry.

7 to 9 are views showing an inlay sheet 1 on which an LED element according to an embodiment of the present invention is mounted, FIG. 7 is a plan view illustrating an inlay sheet 1 on which an LED element is mounted, FIG. 8 is an enlarged cross-sectional view illustrating an inlay sheet 1 on which an LED element is mounted and a smart product in which a printing structure is laminated, and FIG. 9 is a cross- FIG.

As shown in FIG. 7, the inlay sheet 1 of the present invention has a planar area in which a LED is seen and a stereoscopic effect viewing area 40 is prepared with a predetermined area for viewing the stereoscopic effect, The LED 24 and the element substrate 23 are formed around the region 40 and the antenna coil 22 is wrapped around the region where the LED 24 and the element substrate 23 are formed and the light source of the LED 24 And is configured to emit light laterally toward the center of the stereoscopic effect viewing region (40).

In general, an illuminating card or an advertising lighting product using an LED element mainly comprises a sheet printed with a design on the uppermost side of the product, and a light guide plate or a diffusion plate formed on the lower side of the printing surface, So that the entire printed surface is illuminated brightly.

Therefore, this technique is a technique using total reflection of a side light source, so that it is common sense that the light guide plate or the diffuser plate and the printing sheet are not necessarily adhered to each other and the total reflection occurs only in a separated state. That is, since the sheet is not bonded between the sheets, it means that the product is weak in durability before it is caught by a frame or the like. If the light guide plate or the diffuser plate and the printing sheet are adhered to each other, the total reflection is not performed. Therefore, the light is not diffused evenly by the adhered printed matter, Do not.

Therefore, as shown in FIGS. 8 to 9, it is natural that the durability should be ensured due to the characteristics of the product, and therefore, even if the adhesives or (and) the refractory resin 15 and the hot press maintain the bonded state, So that the inserted LED element is configured to generate light metering and total reflection so as to be observed in the stereoscopic effect and illumination effect viewing area 40. [ That is, it is not intended to provide a front design print 701 formed on a general front design print sheet 700, but to allow the user to look through the printed outline of the pattern 31 in the perspective area 40, It is the main purpose.

Therefore, as shown in the total reflection path and side light path shown in Fig. 9, the design print sheet 700 in the stereoscopic effect and illumination effect viewing area 40 must not be printed, and this causes total reflection as a transparent material. This total reflected light illuminates the concave-convex pattern 31 of the concavo-convex pattern layer 30 again, so that the light source that is photographed and totally reflected from the LED can be efficiently observed. This is because the printed outline of the concave-convex pattern 31 in the viewing area 40 is expressed as a security identification pattern so that anyone can emphasize and view the security identification pattern that can be verified.

10 shows another example of the present invention in which a lens layer 10 and an irregular pattern layer 30 which are produced by a hot press are replaced with an ultraviolet curing type lens Layer 10 and the concave-convex pattern layer 30 are formed.

A coil layer 20 or a planar inlay sheet 60 made of a transparent plastic material and having flat upper and lower surfaces is prepared and upper and lower portions of the coil layer 20 or the planar inlay sheet 60 are provided with convex- When lens mold mold 500 and concave-convex pattern mold mold 600 are placed in alignment with each other and UV resin is filled between molds 500 and 600 and coil layer 20 and ultraviolet rays are passed through and cured, The lens layer 10 and the concavo-convex pattern layer 30 are fabricated.

1 to 3, the thickness of the inlay sheet is made to be less than about 0.25 to 0.65 mm. The size and pattern arrangement of the convex lenses are not limited to those of the ultraviolet curing type And is formed by the convex lens mold plate 500. The radius of curvature of each formed convex lens 11 is less than 1/6 of the thickness t2 of the inlay sheet 1 and the focal length t1 of the convex lens 11 is less than the thickness of the inlay sheet 1 is formed to be less than 1/2 of 't2'. It is a matter of course that the concavo-convex pattern layer 30 formed at the lower end of the coil layer 20 has the same pattern arrangement tendency corresponding to the lens layer 10.

11 shows another embodiment of the present invention in which the material constituting the inlay sheet 60 is made of a colored or transparent plastic material and the coil layer 20 is formed between the upper and lower flattened layer sheets 100, And the planar inlay sheet 60 integrated by the hot press work is first prepared. A predetermined portion of the planar inlay sheet 60, which is the three-dimensional effect viewing region 40, is previously cut in accordance with a predetermined area for viewing the three-dimensional effect on the prepared planar inlay sheet 60, that is, Or the CNC milling operation, and inserts the three-dimensional effect piece sheet 50 of the same size as the space, thereby completing the special effect inlay sheet 1.

2.5t₁ 이고 0.25 ∼ 0.65mm미만으로 이루어지며,In a three-dimensional effect piece sheet 50 having a special effect inserted into a predetermined area of a planar inlay sheet 60, the radius of curvature of the convex lenses 11 is set to 1/6 of the thickness 't2' , And the focal length 't1' of the convex lens 11 is formed to be less than 1/2 of the thickness 't2' of the engraved sheet 50. The thickness (t2) by more than 2.5 times the focal length (t1) of the positive lens is configured at the top, t ₂

2.5t &_lt; / _RTI > and less than 0.25 to 0.65mm,

The concavo-convex pattern 31 has the same pattern arrangement tendency corresponding to the pattern arrangement of the convex lenses 11, and the print films 32 and 33 are formed on the surface of the concavo-convex pattern 31.

1. Special effects inlay sheet
2. Smart card or smart product
10. Lens layer
11. Convex lens
15. Refractive resin or (and) adhesive
20. Coil layer
21. Device
22. Antenna coil
23. Substrate
24. LED
30. Uneven pattern layer
31. Uneven pattern
32. Print film
33. Thin film printing
40. stereoscopic effect viewing area
50. Special Effect Carving Sheet
60. Flat Inlay Sheet
100. Layer sheet for printing layer
200. Layer sheets for RF chips A.
201. Layer sheet for combination chip A.
300. Layer sheets for RF chips B.
301. Layer sheet for combination chip B.
400. Layer sheet for uneven pattern layer
500. Mold plate for molding a convex lens
600. Mold plate for molding uneven pattern
700. Front Design Printing Sheet
701. Front Design Printing
702. Front Design Overlay Sheets
800. Backside design print sheet
801. Back Design Printing
802. Rear design overlay sheet
900. Magnetic tape
t1. Focal length of convex lens
t2. Thickness of inlay sheet (three-dimensional sheet)

Claims (8)

In an inlay sheet for use in a smart card or smart product,
A lens layer formed of convex lenses having a radius of curvature equal to or smaller than 1/6 of the thickness 't2' of the inlay sheet 1 with a certain size and pattern arrangement on the uppermost side of the inlay sheet 1, and;
A 'coil layer' made of a transparent plastic material at the lower end thereof and configured to insert an antenna coil or (and) element between or between one or three layer sheets or on a surface thereof;
A concavo-convex pattern made of a transparent plastic material at its lower end and formed by a hot press on the lowermost side has the same pattern arrangement tendency corresponding to the above-mentioned 'lens layer', and the concavo- An uneven pattern layer on which a print film is formed;
Wherein a "lens layer" and "coil layer" and "concave-convex pattern layer, are laminated, the laminate thickness (t2) is by at least 2.5 times the focal length (t1) of the positive lens, t ₂

2.5t &_lt; / _RTI &_gt; and less than 0.25mm to less than 0.65mm. ≪ Desc / Clms Page number ₁₃ > The inlay sheet (1) according to claim 1, characterized in that a front design print (701) is formed on the underside of the lens layer. The antenna according to claim 1, wherein an LED element and a substrate are formed around a 'three-dimensional effect viewing region' on a plan view of the coil layer, an antenna coil is formed to surround the LED element and the substrate, The LED element light source emits light laterally toward the central portion of the 'stereoscopic effect viewing region', and the printed contour of the concave-convex pattern 31 is emphasized by the photometry and the totally reflected light of the LED And the concavo-convex pattern 31 is enlarged and recognized as a security identification pattern. The method of claim 1, wherein, in place of the convex lenses or the concavo-convex pattern formed by the heat press and made of a transparent plastic material, the ultraviolet curable UV resin is used as the convex lenses or the convex lenses ) Pattern is hardened and integrated. The inlay sheet (1) according to claim 1, wherein a three-dimensional pattern by a printing method is printed and integrated in place of a concavo-convex pattern formed by a heat press and made of a transparent plastic material. The inlay sheet (1) according to claim 1, characterized in that transparent refractory resin and / or adhesive having a refractive index of 1.49 or less is applied to the surface of the convex lenses constituting the lens layer. delete The inlay according to any one of claims 1 to 6, characterized in that the front design print sheet and the back design print sheet are integrally formed by an adhesive or hot press joining process on the top and bottom of the 'inlay sheet' Sheet (1).

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