JP2000285219A - Rewrite type IC information carrier - Google Patents

Abstract

(57) Abstract: In an IC information carrying medium having a rewrite display section, a rewrite display section can be easily formed, and information is provided by applying a charge to the rewrite display section without performing a heating process. To provide a rewritable IC information-carrying medium which can fix the information display without having a charge supply means by itself. SOLUTION: In an IC information carrying medium having a rewrite display section, the rewrite display section includes a dispersion liquid in which at least one kind of electrophoretic fine particles having a different hue from the dispersion medium is dispersed in a dispersion medium. The microcapsules and a paint containing a binder component as main components were formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable IC information carrying medium having a rewrite display section and holding an IC module, such as cards, tags, labels, and forms.
More specifically, the present invention relates to a rewritable IC information-carrying medium on which information can be written and erased by applying a charge to a rewritable display section.

[0002]

2. Description of the Related Art Recently, an I / O for recording digital information has been developed.
Numerous IC information carrying media such as IC cards, IC tags, IC labels, IC forms, etc. holding C modules have been developed. For example, ID cards, membership cards, prepaid cards or commuter passes, pass tickets, event numbered tickets, etc. The development of IC is progressing in various fields. Furthermore, recently, a rewrite display unit is attached to the IC information carrying medium,
All or part of the information recorded on the IC module can be directly viewed by the user without passing through the display of the reading device, thereby improving the functionality and convenience.

[0003] The conventional rewrite display section comprises the following. First, a reversible thermosensitive recording material composed mainly of a synthetic resin and an organic low-molecular substance dispersed therein, and to which an infrared absorber is added, has a cloudy state due to a change in the crystal state of the organic low-molecular substance. And the transparent state is reversibly changed to display information. In the rewrite display section having this configuration, information is usually written by scanning at a high temperature by a thermal head or laser irradiation, while information is erased by pressing a heated plate.

Next, a leuco-based color former of lactone, fluoran, or spiropyran type, and a developer / decompressor of a compound having both a functional group of an acidic group such as a phenol group and a carboxyl group and a basic group of an amino group are provided. In the case of a composition mainly composed of a binder component composed of a thermosetting resin, waxes, rubbers, etc., a leuco-based color former is developed by a change in acidity or basicity due to a thermal change in the developer.
Display and delete information by reducing the color. In the display unit of this configuration, heat treatment is performed by a thermal head or laser irradiation, and hydrogen ions of the color-reducing agent react with the leuco-based coloring agent, and information is written or erased by the structural change of the leuco-based coloring agent. Or

[0005] Further, in the case where microcapsules containing a flake-like magnetic powder and a dispersion medium in a solid phase at room temperature are dispersed in a binder component, the flake-like magnetic powder is oriented by applying a magnetic field after heat treatment. Information is displayed. In the display unit of this configuration, a heat treatment is performed by a thermal head or laser irradiation to change the phase of the dispersion medium in a solid state into a liquid state, and a magnetic field is applied in this state to change the orientation state of the flake-shaped magnetic powder to a magnetic state. Information is written or erased by changing the direction of the magnetic field by changing the presence or absence of the magnetic field.

[0006]

As described above, the conventional rewritable display section usually requires heat treatment of the display section by means of a thermal head or laser irradiation. Or the protective layer of the rewrite display portion may be adversely affected, so that the material of the base or the protective layer is limited, or the durability of the substrate or the protective layer is reduced. In addition, the thermal printing apparatus and the laser irradiation apparatus are complicated and expensive in terms of cost. further,
As a rewrite display method without heat treatment, there is a method of displaying information by using a liquid crystal and applying an electric charge, but in this method, the electric charge must be constantly applied to fix the information display. In addition, it is necessary to hold the power supply means such as a power supply and electrodes in the information carrying medium itself.

Accordingly, the present invention provides an IC information carrying medium having a rewrite display section, in which a rewrite display section can be easily formed, and information can be provided by applying electric charges to the rewrite display section without performing a heat treatment. Is displayed, and
It is an object of the present invention to provide a rewritable IC information carrying medium that can fix an information display without having a charge supply unit.

[0008]

Means for Solving the Problems To solve the above problem, the present inventor has proposed, in an IC information carrying medium having a rewrite display section, to dispose the rewrite display section in a dispersion medium having a hue different from that of the dispersion medium. The present inventors have found that a microcapsule containing a dispersion liquid in which at least one or more kinds of electrophoretic fine particles are dispersed and a paint containing a binder component as a main component are formed, and the present invention has been conceived.

That is, the rewritable type IC information carrying medium of the present invention has a rewritable type information holding medium which holds an IC module on a base and displays at least a part of information recorded on the IC module on the surface. An IC information carrying medium, wherein the rewrite display unit includes a microcapsule and a binder component, each of which includes a dispersion in which at least one or more kinds of electrophoretic fine particles having a different hue from the dispersion medium are dispersed in a dispersion medium. It is characterized by being formed by a paint as a main component.

[0010]

Next, an embodiment in which the rewritable IC information-bearing medium of the present invention is constituted as an entrance ticket having a rewrite display section holding an IC module (hereinafter referred to as a "rewrite-type IC entrance ticket"). It will be described based on. Here, FIG. 1 is an explanatory cross-sectional view of a rewrite-type IC admission ticket, FIG. 2 is a plan view showing an information display state of a rewrite display section of FIG. 1, and FIG. 3 is a method of writing information on the rewrite display section of FIG. It is a schematic explanatory view of.

First, as shown in FIG. 1, a rewrite type IC admission ticket 1 of this embodiment is used for writing / erasing information by a contact method, and includes a concert title, a date, a name of a visitor, a seat number, and a fee. An IC module 3 for recording entry-related information such as a start time is included in the base 2, and a rewrite display unit 4 for allowing the recorded information to be visually recognized is provided on the surface of the base 2. Become.

[0012] The rewrite-type IC admission ticket 1 configured as described above is used, for example, at a concert hall when a visitor having the rewrite-type IC admission ticket 1 passes through a gate, enters a predetermined processing device. By inserting 1, the entry procedure can be easily performed without the work of cutting the stub manually. If you try to enter illegally without having an admission ticket, the gate will close and you will not be able to enter. In addition, the visitor information of the gate is stored and managed in a database through a network. Then, when the visitor who has entered the concert venue passes the gate and inserts the admission ticket 1 into the processing device, the rewrite display section 4 displays the admission-related information recorded in the IC module 3 as shown in FIG. By displaying the name, seat number, and seat drawing of the visitor from the information, the visitor can confirm his or her own seat with this.

Hereinafter, the rewrite display section in the present invention will be described in detail. The rewrite display portion of the present invention is a microcapsule containing a dispersion in which at least one or more electrophoretic fine particles having a different hue from the dispersion medium are dispersed in a dispersion medium, and a coating mainly containing a binder component. Is formed. First, as the electrophoretic fine particles, various organic and inorganic pigments, dyes, fine powders such as metal powder or resin,
It is charged positively or negatively, and, for example, titanium oxide, carbon black, anthraquinone dyes and the like can be suitably used. Further, as a dispersion medium for dispersing the electrophoretic fine particles, a dielectric material, various alcohols, various esters, various hydrocarbons, halogenated hydrocarbons and various oils alone or as a mixture of surfactants,
What added a dispersing agent, a stabilizer, a lubricant, etc. suitably can be utilized conveniently.

The electrophoretic fine particles are dispersed in a dispersion medium at an appropriate concentration, preferably 5 to 50% by weight, more preferably 10 to 30% by weight. The dispersion prepared in this manner is encapsulated by a known microcapsule method, for example, a coacervation method of gum arabic gelatin, an interfacial polymerization method for forming polyamide and polyurea, and a microparticle having a particle diameter of about 5 to 50 μm. Encapsulated in a capsule. The microcapsules containing the dispersion liquid thus formed are mixed with a binder component at an appropriate ratio to prepare a coating material. A preferable mixing ratio of the microcapsules and the binder component is 1: 1 by weight.
It is about 1: 1 to 5: 1, and more preferably about 3: 1 to 2: 1.

The binder component may be an adhesive composition such as an acrylic, urethane, ester, or silicone adhesive. Preferably, the binder component has good adhesiveness to the substrate of the information carrying medium. In this case, it is preferable to use a known vehicle component used in an oxidation polymerization type or ultraviolet curable printing ink. By “inking” in this way, the rewrite display portion can be easily printed and applied to the surface of the base using a normal printing machine or applicator.

Further, the electrophoretic fine particles and the dispersion medium need to have different hues. For example, as shown in FIG. 3, the method of writing information to the rewrite display unit 4 in the present embodiment uses a negatively charged white pigment P (titanium oxide) as electrophoretic fine particles and a black dispersion having a different hue from the pigment. A microcapsule C containing a medium M (colorant can be added) is used, and a pair of electrodes a,
First, a positive charge is applied to the upper electrode a and a negative charge is applied to the lower electrode b.
(A) The negatively charged white pigment P migrates toward the anode electrode a by Coulomb force and adheres to the electrode a side, so that the adhered portion can be visually recognized as white. On the other hand, when the polarity is reversed, (b) the white pigment P adheres to the anode electrode b side,
This time, the rewrite display section 4 is visually recognized as black by the black dispersion medium M. In a state where no electric charge is applied, the white pigment P maintains the attached state, so that the information display can be fixed without having the electric charge supply means by itself. The present invention is not limited to this, two or more types of electrophoretic fine particles having different positive and negative charges, different hues, and further, if the presence or absence of electrophoresis is adjusted by the strength of the charge, a plurality of Information can be displayed on the rewrite display unit in hue.

[0017]

As described above, the rewritable IC information storage medium of the present invention displays all or a part of the information recorded in the IC module, and allows the user to directly display the information without using the display of the reading device. Is an information-bearing medium having improved functionality and convenience by allowing recorded information to be visually recognized, in which a rewritable display section can be easily formed, and the rewritable display section includes a base for the information-bearing medium. Without performing a heat treatment that adversely affects the protective layer of the display unit or the like, information can be displayed by applying charges, and the information display can be fixed without having a charge supply unit by itself. Play.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a rewrite-type IC admission ticket.

FIG. 2 is an exemplary plan view showing an information display state of a rewrite display unit in FIG. 1;

FIG. 3 is a schematic explanatory diagram of a method of writing information to a rewrite display unit in FIG. 1;

[Description of Signs] 1 Rewrite-type IC admission ticket 2 Base 3 IC module 4 Rewrite display

Claims (1)

[Claims] 1. A rewritable IC information-bearing medium having an IC module held on a base and having a rewritable display portion on its surface capable of displaying at least a part of information recorded in the IC module, wherein the rewritable display is provided. Part is formed of a microcapsule containing a dispersion in which at least one type of electrophoretic fine particles having a different hue from the dispersion medium and having a different hue from the dispersion medium is dispersed, and a rewrite formed by a paint containing a binder component as a main component. Type IC information carrying medium.