JP2005011190A - Information medium with display function and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a warp of an information medium with a display function such as an IC card. <P>SOLUTION: This information medium 10 with the display function has a display module 30 displayed with an image, and an IC module 40 incorporating an IC chip 46. The IC chip 40 is previously processed such that the IC module 40 has the same thickness as the display module 30. A center sheet 20 of a thermoplastic resin is formed with openings 22, 24, and the display module 30 and the IC module 40 are fitted in the openings 22, 24. By sandwiching them between two clad sheets 12, 14 each made of a thermoplastic resin, having the same thickness, and performing hot pressing, the information medium 10 with the display function is manufactured. By providing the center sheet 20, the whole becomes uniform in the thickness direction to prevent generation of the warp of the information medium, unevenness of a surface, or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information medium with a display function such as an IC card used in a distribution business, a retail business, a manufacturing industry, an office and the like, and a method of manufacturing the information medium with a display function, and more particularly, a pass ticket, a prepaid card, a ticket, Information medium with a display function used as an admission ticket, ID card, game card, point card, bank card, credit card, telephone card, boarding pass, distribution / distribution tag, and the like, and a method of manufacturing the information medium with a display function .
[0002]
[Prior art]
The IC card has a built-in contact-type IC card that transmits and receives data by connecting the external terminal of the card and an external processing device, an antenna coil that transmits and receives data using electromagnetic waves, and a semiconductor element for data processing. However, a non-contact type IC card (non-contact type IC card) that can realize reading and writing with an external processing device by a so-called wireless method has been developed. As this non-contact type IC card, a type in which driving power of an IC circuit is supplied by electromagnetic induction and no battery is built in has been proposed.
[0003]
Among the above, the non-contact type IC card generally includes a resin substrate, a metal antenna coil provided on the resin substrate, and an IC chip connected to the antenna coil. When electromagnetic waves are emitted from the reading device side to the non-contact type IC card, an induced voltage is generated in the antenna coil to operate the IC chip.
[0004]
A non-contact type IC card is convenient because it can be read without passing the card through a reader, but there is an inconvenience that content information such as a balance cannot be seen. Therefore, a non-contact type IC card with a display function in which a display module is integrated has been proposed.
[0005]
In such a non-contact type IC card manufacturing method, for example, as shown in FIG. 10, first, the display module 106 including the magnetophoretic capsule 106 a is applied and formed on the transparent protective body 100. The thermoplastic resin sheet 108 and the IC module 110 are sandwiched between the transparent protective body 100 and the other transparent protective body 102, and the IC card 112 with a display function is pressed by heating and pressing. Manufactured (see, for example, Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-348468
[Problems to be solved by the invention]
However, in the IC card 112 with a display function as shown in FIG. 10, since the display module 106 and the IC module 110 have different thicknesses, the heating coefficient is also increased due to the difference in the thermal expansion coefficients of the members constituting them. Warping occurs during pressure pressing.
[0008]
Such an IC card with a display function causes a conveyance trouble in the reading / writing device due to warping, and has an aesthetic problem. In addition, there is a problem that it becomes difficult to accommodate the IC cards with display functions when they are stacked due to warping.
[0009]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an information medium with a display function without warping and a method for manufacturing the information medium with a display function.
[0010]
[Means for Solving the Problems]
In order to solve the above problems, an information medium with a display function according to the invention described in claim 1 includes a display module and two IC modules processed in advance so as to have the same thickness as the display module. It is characterized in that it is sandwiched between clad sheets made of a thermoplastic resin having the same thickness and subjected to hot-press press forming.
[0011]
According to the information medium with a display function according to claim 1, since the display module and the IC module are sandwiched between the clad sheets made of the thermoplastic resin having the same thickness, the display module and the IC module are substantially symmetrical in the thickness direction, and warpage can be prevented. . Further, by processing the IC module so as to have the same thickness as that of the display module in advance, the unevenness of the surface can be reduced and the entire thickness can be made uniform. Accordingly, it is possible to prevent the occurrence of a conveyance trouble in the reading / writing device or the like when the information medium with a display function is stacked, or when the information medium has a display function.
[0012]
According to a second aspect of the present invention, there is provided an information medium with a display function according to the first aspect of the present invention, wherein the center sheet is made of a thermoplastic resin in which openings are formed in advance according to the dimensions of the display module and the IC module. The display module and the IC module are fitted and sandwiched between the clad sheets to be molded.
[0013]
According to the information medium with a display function according to claim 2, the opening is formed in the center sheet made of the thermoplastic resin in accordance with the dimensions of the display module and the IC module, and the display module and the IC module are fitted into the opening. For this reason, the center sheet is entirely symmetrical in the thickness direction, and warpage can be prevented by sandwiching and molding between the clad sheets. Furthermore, the unevenness of the surface can be reduced, and the overall thickness can be made more uniform.
[0014]
An information medium with a display function according to a third aspect of the present invention is the configuration according to the first or second aspect, wherein an opening is provided in the display module, and the IC module is fitted into the opening. It is characterized by being heated and pressed.
[0015]
According to the information medium with a display function according to the third aspect, the opening is provided in the display module, and the IC module is fitted into the opening, so that it is symmetric in the thickness direction and warpage can be prevented. Further, since the display module and the IC module have the same thickness, the surface unevenness can be reduced and the entire thickness can be made uniform.
[0016]
According to a fourth aspect of the present invention, there is provided a method of manufacturing an information medium with a display function, wherein an IC module is processed so as to have the same thickness as the display module, and the display module and the IC module are formed on a center sheet made of a thermoplastic resin. The display module and the IC module are fitted into the opening, and the center sheet fitted into the opening is formed between two clad sheets made of thermoplastic resin having the same thickness. It is characterized in that it is manufactured by press-molding by heating and pressing.
[0017]
According to the method for manufacturing an information medium with a display function according to claim 4, an opening is formed in the center sheet made of a thermoplastic resin in accordance with the dimensions of the display module and the IC module, and the display module and the IC module are formed in the opening. Therefore, the center sheet is symmetrical in the thickness direction, and warpage can be prevented. Furthermore, the unevenness of the surface can be reduced, and the overall thickness can be made more uniform.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of an information medium with a display function according to the present invention will be described with reference to FIGS.
[0019]
As shown in FIGS. 1, 2, and 5, the information medium with a display function 10 includes a display module 30 on which an image is displayed, an IC module 40 in which an IC chip 46 and an antenna coil 44 are mounted on a substrate 42. It has. The IC module 40 is formed to have the same thickness as the display module 30 by adjusting the thickness of the covering member 48 for molding the IC chip 46 on the substrate 42.
[0020]
As shown in FIGS. 1 and 3, openings 22 and 24 are formed in the center sheet 20 made of thermoplastic resin in accordance with the external dimensions of the display module 30 and the IC module 40. The display module 30 and the IC module 40 are fitted. Then, as shown in FIG. 4, a plurality of center sheets 20 into which the display module 30 and the IC module 40 are fitted are arranged on the clad sheet 14 made of thermoplastic resin, and the clad sheet 12 having the same thickness is formed thereon. A plurality of information media with a display function 10 are produced at a time by being heated and pressed by press plates 50 and 52, and then cut into a card size.
[0021]
As shown in FIG. 2, the display function-equipped information medium 10 includes a display module 30 and an IC module 40 arranged in parallel, and two electrodes 38 for applying a voltage to the display module 30 are provided.
[0022]
Since the information medium 10 with a display function needs to maintain display even when it is carried, the display module 30 needs to use a memory display method. Examples of such memory-based display methods include a method in which leuco dyes are decolored by heating and cooling, a method in which organic low molecules such as behenic acid are heated and cooled to crystallize / non-crystallize and become cloudy / transparent. , Method using magnetophoresis of magnetic particles dispersed in liquid, method using movement of charged colored fine particles in water or gas by electric field, cholesteric liquid crystal, ferroelectric liquid crystal, bistable nematic liquid crystal, smectic liquid crystal, etc. A method using alignment change due to heat or electric field of a memory liquid crystal, a method using an electrochromic effect such as a conductive polymer or an oxide, a method using precipitation / dissolution by a metal redox reaction, etc. can be used.
[0023]
The rewriting method of the memory-type display module depends on the display method. For example, the thermal recording method uses a scanning method such as a thermal head and a laser scanning head, the magnetic recording method uses a magnetic head, the optical recording method uses a laser scanning head, Rewriting can be performed using an electrostatic head, an ion flow head or the like in the electric recording system using an LED head, an EL head, a liquid crystal shutter head, or the like.
[0024]
In the case of the electric recording method, it is also possible to perform rewriting by applying a voltage with a display material sandwiched between a pair of electrodes, instead of scanning by the writing head as described above. For example, a simple matrix panel having a pixel at the intersection of two orthogonal strip electrode groups is used, or the display surface is divided into independent small pixels, and thin film transistors, thin film diodes, MIM (Metal- An active matrix panel to which active elements such as an insulator-metal element are connected can also be used.
[0025]
Alternatively, an optical writing method in which a display material and a photoconductive material stack are sandwiched between a pair of electrodes and a display is rewritten by applying a voltage between the electrodes while projecting an image to be displayed can be used. In the case of using a matrix panel, if the number of scanning lines and the number of signal lines are provided, the number of terminals is too large, and there are problems in terms of area and contact reliability. For this reason, a driving IC may be incorporated to reduce the number of terminals.
[0026]
As shown in FIG. 6, the display module 30 of the present embodiment has a transparent electrode 34 formed in a transparent substrate 32, and a charge generating material that generates charges by light irradiation on the transparent electrode 34. And a photoconductive layer 33b made of a composite of a charge transport material that generates charge transfer by an electric field. A display layer 33a made of capsulated cholesteric liquid crystal is formed on the photoconductive layer 33b, and a transparent electrode 35 and a transparent substrate 31 are further provided thereon. A voltage is applied to the transparent electrode 34 and the transparent electrode 35 by a terminal 36, respectively.
[0027]
The display module 30 applies a voltage from the terminal 36 to the transparent electrodes 34 and 35 while irradiating a light image through the transparent substrate 31 and the transparent electrode 35. As a result, the resistance of the photoconductive layer 33b is changed, and the orientation of the cholesteric liquid crystal forming the display layer 33a is changed, whereby the color light according to the spiral pitch of the liquid crystal can be selectively reflected, and the irradiated light image is imaged. It is supposed to be recorded as.
[0028]
The photoconductive layer 33b includes: (a) inorganic semiconductor material: amorphous silicon, compound semiconductor such as ZnSe, CdS, (b) organic semiconductor material; anthracene, polyvinylcarbazole, etc. (c) charge by light irradiation A composite of a charge generation material that generates a charge and a charge transport material that generates a charge transfer by an electric field; Examples of charge transport materials such as thiapyrylium / polycarbonate compounds include trinitrofluorene, polyvinylcarbazole, oxadiazole, pyralizone, hydrazone, stilbene, triphenylamine, triphenylmethane, and diamine. Compounds, IClO ₄ Polyvinyl alcohol was added - ion conducting material such as Le and polyethylene oxide, the laminate as a composite form, the mixture may be utilized, such as microcapsules.
[0029]
As shown in FIG. 5, the IC module 40 is a module in which an antenna coil 44 for data transmission / reception and driving power supply and an IC chip 46 are mounted on a substrate 42 made of a resin such as polyimide, polyester resin, or olefin. .
[0030]
The antenna coil 44 is made of a metal such as copper or aluminum. The antenna coil 44 is formed by a method of etching a metal foil, a method of electroplating or electrodepositing a metal, a method of printing a conductive paste containing metal powder, or the like.
[0031]
The IC chip 46 includes a memory, a CPU, a power supply circuit, a communication circuit, and the like, and is connected to the antenna circuit by an anisotropic conductive film or bump connection.
[0032]
The IC module 40 is molded with a covering member 48 in order to reduce the surface unevenness and to make the thickness equal to that of the display module 30 because the portion of the IC chip 46 rises from the portion of the antenna coil 44. As the covering member 48, a thermosetting resin such as an epoxy resin, an acrylic resin, or a urethane resin may be used in addition to the same thermoplastic resin as the clad sheets 12 and 14 described below.
[0033]
The difference in thickness between the display module 30 and the IC module 40 is preferably within ± 20%, more preferably ± 10%.
[0034]
As the clad sheets 12 and 14, modified polyester resins such as PETG, olefin resins, ionomers, polyvinyl chloride, ABS (acrylonitrile-butadiene-styrene) resins, AS (acrylonitrile-styrene) resins, polystyrene, acrylic resins, methacrylic resins , Polyvinyl acetate, vinyl butyral resin, EVAC (ethylene-vinyl acetate resin), cellulose derivative resin, urethane resin, polyester resin, polyamide resin, nylon, polyacetal, polycarbonate, fluororesin, polyester resin, polyetherimide, A thermoplastic resin such as a single polyimide, a mixture, or a copolymer is used.
[0035]
The thickness of the clad sheets 12 and 14 is usually used in the range of 20 to 500 μm, and the difference in thickness between the two is preferably within ± 20%, more preferably ± 10%. In order to give designability, the surface of the clad sheets 12 and 14 may be printed, or another preprinted sheet may be stacked and pressed. However, when pressing another sheet, it is desirable to paste sheets of the same material and thickness on the back and front so as not to be asymmetric in the thickness direction.
[0036]
The center sheet 20 is not always necessary, but is useful for positioning the display module 30 and the IC module 40 by the openings 22 and 24 and reducing irregularities between them and at the edge of the information medium. The material used is the same thermoplastic resin as the clad sheets 12 and 14. In order to reduce warpage, the center sheet 20 and the clad sheets 12 and 14 are preferably made of the same material.
[0037]
Next, a second embodiment of the information medium with a display function according to the present invention will be described with reference to FIGS.
[0038]
In addition, the same code | symbol is attached | subjected to the member demonstrated in 1st Embodiment, and the overlapping description is abbreviate | omitted.
[0039]
As shown in FIG. 7, the information medium 60 with a display function is provided with an opening 81 at substantially the center of the display module 70, and an IC module 80 is fitted in the opening 81. The display module 70 in which the IC module 80 is fitted is fitted in a center sheet (not shown) provided with an opening in advance according to the dimensions of the IC module 80 as in the first embodiment, and these are placed between the clad sheets. The information medium 60 with a display function is manufactured by sandwiching and pressing with heat.
[0040]
Such an information medium 60 with a display function can be applied to a case where a post-type wireless reading / writing device is used as shown in FIG. That is, a post 92 into which the information medium 60 with a display function is placed is disposed on the wall 90, and an antenna 94 is provided at a position facing the post 92.
[0041]
In such a post-type wireless reading / writing device, the antenna 94 is installed so as to read / write at the central portion of the information medium 60 with a display function (position where the IC module 80 is provided). Even if the information medium 60 with a display function is thrown into the post 92 in any direction on the top, bottom, left, and right sides, it can be read and written correctly.
[0042]
In the present embodiment, the IC module 80 is arranged at the center of the display module 70, but the arrangement of the display module and the IC module is arbitrary, and is not necessarily limited to the arrangement shown in FIGS.
[0043]
【Example】
Hereinafter, examples of the information medium with a display function 10 according to the present invention will be described.
(Example 1)
The display module 30 was produced as follows.
[0044]
As shown in FIG. 6, a commercially available PET substrate with an ITO electrode was prepared, and the electrode pattern was etched to prepare a transparent electrode 35 and a transparent substrate 31, and a transparent electrode 34 and a transparent substrate 32. Next, a microcapsule having polyurea as a shell and cholesteric liquid crystal having selective reflection in the visible wavelength region as a core was prepared, and this was dispersed in an aqueous polyvinyl alcohol solution to prepare a capsule coating solution. This capsule coating solution was applied onto the transparent electrode 35 to produce a display layer 33a.
[0045]
Next, a resin solution in which a phthalocyanine-based charge generating material is dispersed, a resin solution containing a benzidine-based charge transporting material, and a resin solution in which a phthalocyanine-based charge generating material is dispersed again are sequentially applied onto the transparent electrode 34 to form a photoelectric conducting layer 33b. Formed. And the transparent substrate 31 and the transparent substrate 32 were adhere | attached with the adhesive so that the display layer 33a and the photoelectric conduction layer 33b might oppose. Finally, electrode openings were formed and terminals 36 were attached to complete the display module 30. Thus, the thickness of the produced display module 30 was 300 micrometers.
[0046]
The display module 30 was able to record the irradiated light image as an image by applying a voltage to the terminal 36 while irradiating the light image through the transparent substrate 31 and the transparent electrode 35.
[0047]
The IC module 40 was produced as follows.
[0048]
A commercially available RF-ID tag inlet (V720-D52P04, OMRON) was used. As shown in FIG. 9, the tag inlet 200 has an IC chip 46 portion with a thickness of 270 μm and an antenna coil 44 portion with a thickness of 50 μm. A thermoplastic resin PETG sheet 204 with a thickness of 250 μm was stacked on the tag inlet 200. Then, the thickness of the IC module 40 was processed to 300 μm by heating and pressing at 120 ° C. for 10 minutes at a pressure of 5 kgf / cm ² .
[0049]
The center sheet 20 used the following.
[0050]
As shown in FIG. 3, a sheet made of a thermoplastic resin PETG having a thickness of 300 μm was punched out to form openings 22 and 24, thereby producing a center sheet 20. The display module 30 and the IC module 40 are fitted into the openings 22 and 24.
[0051]
The following were used for the clad sheets 12 and 14.
[0052]
Clad sheets 12 and 14 made of a thermoplastic resin PETG having a thickness of 250 μm were used. As shown in FIG. 4, a plurality of center sheets 20 into which the display module 30 and the IC module 40 are fitted are prepared, and these are sandwiched between the clad sheets 12 and 14, and further, two press plates 50 and 52 are provided. And set in a vacuum press machine at 120 ° C. for 10 minutes under a pressure of 5 kgf / cm ² under vacuum heating and pressing. Finally, the outer shape of the card was punched out with a punching machine to complete the information medium 10 with a display function as shown in FIG.
[0053]
The information function-added information medium 10 has no warp and has a small surface irregularity, so that it is confirmed that even if a plurality of information media 10 are stacked, the information medium 10 is not inclined, and it is possible to reduce conveyance troubles caused by the reading / writing device.
[0054]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an information medium with a display function having no warp and a uniform thickness.
[Brief description of the drawings]
FIG. 1 is an exploded sectional view showing an information medium with a display function according to a first embodiment of the present invention.
FIG. 2 is a plan view showing an information medium with a display function according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a method for manufacturing an information medium with a display function according to the first embodiment of the present invention.
FIG. 4 is a diagram illustrating a method for manufacturing an information medium with a display function according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view showing an IC module of an information medium with a display function according to the first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing the display module of the information medium with a display function according to the first embodiment of the present invention.
FIG. 7 is a plan view showing an information medium with a display function according to a second embodiment of the present invention.
FIG. 8 is a cross-sectional view showing a reading / writing apparatus for an information medium with a display function according to a second embodiment of the present invention.
FIG. 9 is a diagram illustrating a method for manufacturing an IC module used for the information medium with a display function according to the first embodiment.
FIG. 10 is a cross-sectional view showing a conventional method of manufacturing an information medium with a display function.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Information medium with display function 12, 14 Clad sheet 20 Center sheet 22, 24 Opening 30 Display module 31 Transparent substrate 32 Transparent substrate 33a Display layer 33b Photoconductive layer 34 Transparent electrode 35 Transparent electrode 36 Terminal 40 IC module 46 IC chip 48 Coating Member 60 Information medium 70 with display function Display module 80 IC module 81 Opening

Claims (4)

A display module and an IC module processed in advance so as to have the same thickness as the display module are sandwiched between two clad sheets made of a thermoplastic resin having the same thickness, and press-molded by heating and pressing. An information medium with a display function. The display module and the IC module are fitted into a center sheet made of a thermoplastic resin in which openings are formed in advance according to the dimensions of the display module and the IC module, and are formed by being sandwiched between the clad sheets. The information medium with a display function according to claim 1. The information medium with a display function according to claim 1 or 2, wherein an opening is provided in the display module, and the IC module is fitted into the opening to be heated and pressed. Process the IC module so that the thickness is equal to the display module,
In the center sheet made of thermoplastic resin, an opening is formed according to the dimensions of the display module and the IC module,
The display module and the IC module are fitted into the opening,
An information medium with a display function, wherein the center sheet fitted into the opening is sandwiched between two clad sheets made of thermoplastic resin having the same thickness, and heated and pressed to produce. Production method.

Images