JP3013335U - prepaid card - Google Patents

Abstract

(57) [Summary] [Purpose] A prepaid card provided with a forgery prevention means. [Constitution] In a prepaid card in which an identification mark is formed by using a fluorescent ink containing a phosphor whose excitation light wavelength and fluorescence wavelength are both in the infrared region, the identification mark has two types of density. The area filled with any one of the above fluorescent inks is combined to represent binary data.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a prepaid card provided with anti-counterfeiting means.

[0002]

[Prior art]

 It has been proposed to provide anti-counterfeiting means on a card such as a prepaid card, which is often used as a payment method instead of cash, and to identify whether or not these cards are forged.

For example, a means has been proposed in which a card such as a magnetic card is provided with an identification mark that makes it optically readable in the visible light region, and this is optically read to identify the presence or absence of forgery.

[0004]

[Problems to be solved by the device]

 According to the conventional example, even if it is not visible, the identification mark can be easily found by scanning on the card using the existing infrared reflective photocoupler, and the identification mark can be found on these cards. The infrared-absorbing material that makes up the above is not only easily reproducible with carbon-based materials, but there is also the problem that infrared-reflective photocouplers and carbon-based materials are easily forged and cheap.

The present invention has been made in view of the above problems, and an object thereof is to provide a prepaid card that makes it extremely difficult to forge an identification mark of the prepaid card.

[0006]

[Means for Solving the Problems]

 The present invention is a prepaid card in which an identification mark is formed by using a fluorescent ink containing a phosphor whose excitation wavelength and fluorescence wavelength are both in the infrared region. The area filled with one of the fluorescent inks having the density of 4 is combined to represent binary data.

[0007]

[Action]

 Since the identification mark of the prepaid card of the present invention represents the binary data by combining the areas filled with one of the two types of fluorescent ink, the excitation ink is used to express the fluorescent ink of the two types of density. The identification mark can be decoded by binarizing the level of reflected light in the area filled with any of the above.

[0008]

【Example】

 An embodiment of the prepaid card of the present invention will be described with reference to the drawings. 1 and 2 show an embodiment of the card of the present invention. In the mark installation portion 3 on the surface of the card substrate 2, both the excitation wavelength and the fluorescence wavelength are in the infrared region, and the fluorescent material is used. A fluorescent ink layer 7, which is an identification mark formed by combining areas 5 and 6 filled with the contained fluorescent ink in a matrix, is formed by printing.

In order to increase the amount of fluorescence generated in the area 5 more than that in the area 6, the amount of fluorescent ink applied is increased or double coating is applied to adjust the concentration of the fluorescent ink in the area 5. It is printed so that it is darker than that of area 6. In this way, both the excitation wavelength and the fluorescence wavelength can be transmitted in order to conceal the fluorescence ink from the card substrate 2 provided with the areas 5 and 6 which are filled with the fluorescence ink having different densities. The hiding layer 4 may be coated with a hiding ink that has the property of partially absorbing visible light and has opacity so that the fluorescent ink layer 7 cannot be visually confirmed.

When the prepaid card 1 is irradiated with excitation light emitted from a light emitting element (not shown), the card identifying means emits a wave proportional to the concentration of the fluorescent ink from the areas 5 and 6 made of the fluorescent ink. Fluorescence having a high value is generated one after another, and a voltage signal corresponding to the reflected light from the prepaid card 1 and a high-amplitude pulse-shaped signal from the area 5 of the high-density ink layer (binary " 1 ") and a low-amplitude pulse-like signal (binary" 0 ") from area 6 of the low-density ink layer are detected. As a result, the data recorded on the identification mark can be decrypted.

[0011]

[Effect of device]

 According to the present invention, it is possible to record complicated information on a prepaid card, and it is difficult to visually detect that the identification marks of the prepaid card are provided with phosphors having different densities. It is difficult to forge.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a prepaid card of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

1 Prepaid Card 2 Card Base Material 4 Concealment Layer 5 Area Formed with High Concentration Fluorescent Ink 6 Area Formed with Lower Concentration Fluorescent Ink than Area 5

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06K 19/10 G06K 19/00 R

Claims (1)

[Scope of utility model registration request] 1. A fluorescent ink containing a phosphor having both the wavelength of excitation light and the wavelength of fluorescence in the infrared region,
A prepaid card in which an identification mark is formed, wherein the identification mark represents binary data by combining areas filled with one of the two types of the fluorescent inks.