JPH0615685Y2 - Card-shaped information recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a card-shaped information recording medium represented by a prepaid card.

[Conventional technology]

In recent years, card-shaped information recording media typified by prepaid cards (hereinafter simply referred to as information recording media) have come into widespread use because of the convenience of not requiring change. These information recording media are usually magnetic recording media having a magnetic portion for magnetically recording information.

When the information recording medium is inserted into a reader / writer built in or close to a machine body such as a telephone or a game machine, the magnetic reading head of the reader / writer records the effective amount or the effective number of times recorded on the magnetic portion. The information can be read, the information can be displayed on the display unit of the machine body or the reader / writer, and the machine body can be used.

Further, when the use of the machine body such as the telephone or the game machine is finished, the use amount or the number of uses is subtracted, the information is recorded in the magnetic part, and the information recording medium is ejected from the reader / writer.

[Problems to be solved by the device]

By the way, since the information recording medium is basically a magnetic recording medium, rewriting of information is possible (reversible reaction). This is not preferable in applications such as prepaid cards that replace cash vouchers. There are endless cases of forgery of information recording media and falsification of information by malicious persons who actually have knowledge of magnetic recording. Furthermore, the magnetically recorded information is
It may disappear if you touch a clasp such as a magnetic necklace or a handbag that uses a magnet that is present around you.

On the other hand, the information recording medium needs to be easily manufactured because it is consumed in large quantities.

[Problems to be solved by the device]

The present invention has been made in order to solve such problems, and forgery of an information recording medium as compared with a magnetic recording medium,
(EN) Provided is an information recording medium which is difficult to tamper with, does not lose information due to existing magnetism and magnets, and is easy to manufacture.

[Means for Solving the Problems]

The present invention has been made in view of the above problems, and is a card-shaped information recording medium on the surface of which information to be read by the optical information reading means is displayed, and a card on which the information is displayed. A base material, and a phosphor portion that emits fluorescence when a light beam in a specific wavelength region is irradiated on the card base material,
A card provided with a thermosensitive coloring part which is provided on the card base material so as to cover the phosphor part and which blocks the optical reading path of the information by the optical information reading means by coloring. The present invention provides an information recording medium in the form of a sheet.

The phosphor portion also includes a phosphor that emits fluorescence when irradiated with ultraviolet rays in the ultraviolet wavelength range, or a phosphor that emits fluorescence when irradiated with infrared rays in the infrared wavelength range.

[Action]

When the information recording medium of the present invention is irradiated with a light beam from a light source, the thermosensitive coloring part does not block the light in the state where the thermosensitive coloring part does not develop color (initial state), and thus reaches the phosphor part below the thermosensitive coloring part. Then, the phosphor emits fluorescence. The fluorescent light passes through the thermosensitive coloring portion again and is detected by the light receiving element.

Then, in the state where the thermosensitive coloring portion is coloring (after heating), since the thermosensitive coloring portion blocks the light rays, it does not reach the phosphor portion of the lower layer of the thermosensitive coloring portion and may emit fluorescence. Absent.

Since the coloring of the thermosensitive coloring part is an irreversible reaction by a heating means such as a heating element, the thermosensitive coloring is recorded by recording the information of the issued amount or the number of times of issuance by the area of the phosphor part or the number of isolated patterns. Even if tampering (coloring) is added to the copy, the issue amount or the number of times of issue is subtracted.

Furthermore, when several kinds of the issued phosphors are mixed at an appropriate ratio, the generated fluorescence has a special wavelength, so that the effect of preventing forgery can be imparted.

〔Example〕

Hereinafter, an information recording medium according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of an information recording medium 1 according to the present invention, and FIG. 2 is an information recording medium 1 according to the present invention.
It is sectional drawing which shows one Example.

The card base material 2 serves as a support for the phosphor portion and the heat-sensitive color forming portion formed on the card base material 2, and is made of paper, synthetic, PET.
Etc. can be used. The character 5 may be formed in the area other than the heat-sensitive color developing portion of the card base material.

The phosphor part 3 receives a light beam in a specific wavelength range emitted from a light source and generates fluorescence. Examples of the phosphor used in the phosphor part include an ultraviolet light emitting phosphor and an infrared light emitting phosphor.

The UV emitting phosphor is further divided into two.

The first one is one in which the peaks of the fluorescence spectrum emitted when returning to an energy level lower than this by being excited by ultraviolet rays have in the blue, green and red wavelength ranges.

Specifically, Ca ₂ B ₅ O ₉ Cl: Eu ²⁺ , CaW
o ₄ , ZnO: ZN, ZnSiO ₄ : Mn, Y ₂ O
₂ S: En, ZnS: Ag, YVo ₄ : Ev, Y ₂ O ₂
S: Eu, Gd ₂ O ₂ S: Tb, La ₂ O ₂ S: Tb,
Y ₃ Al ₅ O _12: Ce and the like.

The second one is a mixture of the first phosphors described above at a proper ratio, and the fluorescence spectrum thereof has a blue peak.
It has wavelengths other than the green and red wavelength ranges.

The infrared emitting phosphor is further divided into two.

The first one receives the excitation light of wavelength λ ₁ and emits fluorescence in the visible region of wavelength λ ₂ .

Specifically, YF ₃ : Yb, Er, ZnS: Cu,
Co etc. are mentioned.

The second one has the characteristic of receiving the excitation light of the wavelength λ ₁ and emitting the infrared light of the wavelength λ ₂ , where λ ₁ ≠ λ ₂ and λ ₁ <λ ₂
It has the following properties.

Specifically, NiNd _0.9 Y as described in JP-A-54-100991 and JP-B-53-40594 is used.
b _0.1 P ₄ O ₁₂ , LiBi _0.2 Nd _0.7 Yb _0.1 P ₄ O ₁₂ ,
NaNd _0.9 Yb _0.1 P ₄ O ₁₂ , Nd _0.8 Yb _0.2 Na (W
o ₄ ) ₄ , Nd _0.9 Yb _0.1 Na ₅ (MoO ₄ ) ₄ , Nd _0.8
Yb _0.2 Na (Mo _0.5 Wo _0.5 O ₄ ) ₄ , Ce _0.05 Gd
_0.05 Nd _0.75 Yb _0.15 Na ₅ (W _0.7 Wo _0.3 O ₄ ) ₄ ,
Nd _0.6 Yb _0.4 P ₅ O ₁₄ , Nd _0.8 Yb _0.2 K ₃ (P
O ₄ ) _{2 and the} like, each of which emits an infrared ray (λ ₂ ) having a remarkable peak in the emission spectrum at 980 to 1020 nm upon receiving an infrared ray of excitation light (λ ₁ ) of 800 nm.

The phosphor portion 3 in the present invention is formed by printing the above-described color-forming phosphor on the card substrate 2 by converting it into a screen ink or an offset ink. Further, if the light emitting phosphor in the ink has a weight content of 5% or more, the light receiving portion can detect fluorescence and emitted infrared light. The shape of the phosphor portion 3 is not particularly limited, but a plurality of isolated patterns that mean the amount of money to be issued and the number of times of issuance are preferable.

Furthermore, when several kinds of light-emitting phosphors are mixed at an appropriate ratio, the generated fluorescence has a special wavelength, so that the effect of preventing forgery can be imparted.

The heat-sensitive coloring portion 4 is provided on the card base material by printing the heat-sensitive ink by means of screen printing, gravure printing, roll coating or the like to cover the phosphor portion.

The heat-sensitive ink will be described in detail. It is an ink prepared by mixing a colorless dye, a color developer, an additive and the like in a binder.

As the colorless dye in the thermal ink, crystal violet lactone, 3-diethylamino 6-methyl 7-anilinofluorane, triphenylmethanephthalide, phenothiazine and the like are used.

Examples of color developers include bisphenol A, P-phenylphenol, and 2,2-bis (4-hydroxyphenyl) -n.
-Heptane, 4,4'-cyclohexylidenephenol, t-butylphenol, 4-phenylphenol and the like are used.

As additives, lubricants such as wax and higher fatty acids, dispersants, and defoaming agents are appropriately used.

This heat-sensitive ink is transparent or semi-transparent in a non-colored state, so that it transmits ultraviolet rays, infrared rays and fluorescence, but absorbs them when it develops black or blue by heating. That is, the optical reading path described later is blocked.

Furthermore, on this heat-sensitive coloring part, plasticizer resistance and water resistance,
A protective layer for imparting chemical resistance may be provided, polyvinyl alcohol, carbomethyl cellulose,
Resins such as methyl cellulose and hydroxy cellulose can be used.

Hereinafter, an example of using the information recording medium according to the present invention will be described together with a reader / writer that handles it.

FIG. 3 is an explanatory diagram showing the game machine main body 11 and the reader / writer 12 incorporated therein. FIG. 4 is an illustration showing the positional relationship between the optical information reading means 6 which is the main part of the reader / writer and the information recording medium 1.

The optical information reading means 6 is basically a light source 7 for irradiating a light beam (wavelength λ ₁ ) in a specific wavelength region on a card substrate and a light receiving portion for detecting fluorescence (wavelength λ ₂ ) emitted from an information recording medium. It consists of 8. The optical reading path in this specification means
A path connecting a light source, a card, and a light receiving part. In order to reduce the size of the reader / writer, the heat-generating portion for heating and coloring the heat-sensitive coloring portion is joined to the same supporting member as the optical information reading means.

When the information recording medium 1 is inserted into the reader / writer 12,
Among the fluorescent substance parts 3 which are the isolated patterns in which a plurality of optical information reading means 6 are formed, come to the upper part of the first one,
The information recording medium is irradiated with a light source (wavelength λ ₁ ) in a specific wavelength region from the light source 7. Since this is the first use, this time the light ray passes through the heat-sensitive recording portion, hits the first fluorescent material portion, excites it, and emits fluorescence (wavelength λ ₂ ). The fluorescent light passes through the thermal recording unit and is detected by the light receiving unit 8. As a result, it is determined that the information recording medium has an effective amount of money, and that fact is displayed on the display (not shown), and the machine body is made available.

After the end of the game, the heat-sensitive recording portion (the portion including one light-emitting body portion this time) corresponding to the usage amount was heated and colored, and discharged to the outside of the reader / writer.

Next, the same information recording medium was inserted into the reader / writer 12 again. Also this time, the light beam in the specific wavelength region (wavelength λ ₁ ) from the light source 7 comes to the upper part of the first phosphor part 3 which is an isolated pattern in which a plurality of optical information reading means 6 are formed, and is an information recording medium. However, since it could not detect the fluorescence, it moved to the second phosphor part,
When light (wavelength λ ₁ ) was irradiated again, fluorescence was detected this time, so it was judged that there was an effective amount of money on the information recording medium, and that fact was displayed on the display (not shown), and the machine body was used. It was made possible.

After the end of the game, the heat-sensitive recording portion (the portion including one light-emitting body portion this time) corresponding to the amount of money used was further heated and developed, and discharged outside the reader / writer.

[Effect of device]

An information recording medium according to the present invention covers a card substrate on which information is displayed, a phosphor portion that emits fluorescence when a light beam in a specific wavelength region is irradiated on the card substrate, and the phosphor portion. An irreversible information is recorded without using magnetism by being provided on the card substrate and provided with a thermosensitive coloring portion that blocks the optical reading path of the information by the optical information reading means by coloring. can do. Further, if the phosphor portion is formed by inserting a plurality of phosphors, it is difficult to obtain equivalent optical characteristics.

Therefore, it is possible to provide an information recording medium in which it is difficult to forge the information recording medium and falsify the information, the recorded information hardly disappears, and the manufacturing is easy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an information recording medium according to the present invention, FIG.
FIG. 3 is a sectional view of an information recording medium according to the present invention, FIG. 3 is an explanatory view showing a state in which the information recording medium is inserted into a reader / writer built in a game machine main body, and FIG. 4 is an optical information reading. It is explanatory drawing which shows the state in which a means reads the information recorded on the information recording medium. 1 ... Information recording medium 2 ... Card base material 3 ... Phosphor portion 4 ... Thermosensitive coloring portion 5 ... Characters 6 ... Optical information reading means 7 ... Light source portion 8 ... Light receiving portion 9 ... Heat generation Part 11 ... Machine body 12 ... Reader / writer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G07F 7/08

Claims (3)

[Scope of utility model registration request] 1. A card-shaped information recording medium on the surface of which information to be read by an optical information reading means is displayed, and a card base material on which the information is displayed and a specific wavelength on the card base material. An optical reading path of the information by the optical information reading means, which is provided on the card base material to cover the fluorescent material part and which emits fluorescence when the light rays of the area are irradiated and which is colored. A card-shaped information recording medium, comprising: 2. The card-shaped information recording medium according to claim 1, wherein the phosphor portion is made of a phosphor that emits fluorescence when irradiated with ultraviolet rays in the ultraviolet wavelength range. 3. The card-shaped information recording medium according to claim 1, wherein the phosphor portion is made of a phosphor that emits fluorescence when irradiated with infrared rays in the infrared wavelength region.