JPH03281395A - Card - Google Patents

Abstract

PURPOSE:To obtain a card having high alteration preventing effect by incorporating an encoded uneven pattern aiming at optical and mechanical reading at a plurality of arbitrary positions of a numerous-line like uneven pattern constituting a design. CONSTITUTION:When the uneven pattern of the reading part present on a card 1 is irradiated with the incident light 5 from the laser oscillator 8 provided just above the card 1, the reflected light 6 is reflected in the direction vertical to the numerous-line direction of a numerous-like like uneven pattern to return and detected by a photodiode 7. In the case of a reading method, data is displayed by changing the numerous-line direction of a numerous-line like uneven pattern. For example, the uneven pattern consists of a 135 deg.-direction uneven pattern group 92 and a 45 deg.-direction uneven pattern group 94 and the reflected light 62 from the 135 deg.-direction uneven pattern group 92 and the reflected light 64 from the 45 deg.-direction uneven pattern group 94 are respectively detected by photodiodes 72, 74 to confirm a numeral '8'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card having a concavo-convex pattern formed by arranging a plurality of groups of fine linear concavo-convex patterns with the line directions gradually changing.

[Conventional technology]

Conventionally, as a card having a pattern with a finely uneven surface, a group of fine line-like uneven patterns is formed on the surface of a sheet-like substrate with metallic luster by changing the line direction slightly for each pixel. There is a card that has an opal effect (a card that has an opal effect).

Since the line directions of the line-like uneven patterns on the surface of such cards are different, the direction of reflection of light on the surface changes in various ways, and when the viewing angle and direction are changed. The shading and shine of each linear uneven pattern group changes dynamically, creating an extremely brilliant effect (opal effect)
bring out.

The embossed pattern used in the production of cards with this opal effect is extremely difficult to manufacture, making it difficult for a third party to easily counterfeit them.
Used in cards, prepaid cards, etc.

Regarding optical mechanical reading, as a result of research by the inventors, it has been found that reading is possible by using a concavo-convex pattern with a specific shape.

[Problem B to be solved by the invention] When using a card with an opal effect as described in the prior art to prevent counterfeiting, it is easy to distinguish authenticity with the naked eye, but unless the human eye is used, It was difficult to distinguish between authenticity and falsity.The present invention is a highly decorative card with an opal effect, and has a concave-convex pattern that allows for easy mechanical determination of authenticity not only with the naked eye but also with a simple device. Our goal is to provide cards that are more tamper-proof.

[Means to solve the problem]

As a result of intensive research to solve the above problems, the present inventors found that
By specifying the shape of the concavo-convex pattern that produces the conventionally known decorative opal effect, we discovered that it is possible to mechanically distinguish authenticity using a simple device, and the above-mentioned drawbacks of the conventional technology can be easily solved. The present invention was completed by discovering that That is, the present invention provides a card having a concavo-convex pattern formed by arranging a plurality of groups of fine line-like concavo-convex patterns with the line directions gradually changing. A card is provided that incorporates a coded pattern of protrusions and recesses in multiple locations for optical mechanical reading purposes.

(Function) By using the above-mentioned means, cards having the opal effect with a high decorative effect and having a concave-convex pattern that allows the authenticity of these cards to be determined even with a relatively simple device, can be made to look like a card. The position of the concavo-convex pattern for the purpose of optical machine reading cannot be recognized.Thereby, a card is provided which has an enhanced anti-tampering effect in addition to the conventional anti-counterfeiting effect.

[Example] A preferred embodiment of Keyaki will be described in more detail below. FIG. 1 is a diagram showing a card having a concavo-convex pattern according to an example of the present invention, in which coded concavo-convex patterns for the purpose of optical machine reading are placed at appropriate positions of the concavo-convex pattern forming a decorative image area. It is characterized by the fact that it has been incorporated.

For example, pattern 2 in Figure 1 is an alpha bent T.
In the camphor tree shown in FIG. 2, a reading section unevenness pattern 3 is embedded in a pattern 2. Reading pattern A in Figure 2,
D corresponds to the concavo-convex patterns A and D shown in FIG.

To mechanically read the encoded relief pattern of the card of the present invention shown in FIG. 1, an optical mechanical readout as described below is used.

Optical machine reading was performed by the method shown in FIGS. 4 and 5. 4A and 5A are side views, and FIGS. 4B and 5B are top views.

The beam diameter of the incident light 5 emitted by the laser oscillator 8 is 1 mm. When the laser oscillator 8 irradiates the incident light 5 with the laser oscillator 8 from directly above the reading section uneven pattern 3 existing on the card 1, the reflected light 6 is reflected back in a direction perpendicular to the parallel line direction of the rectangular uneven pattern. come. The reflected light 6 is detected by a photodiode 7. In the case of this reading method,
Information is displayed by changing the line direction of the line-shaped uneven pattern group. Eight output detection units using photodiodes 7 are arranged in a circle at equal intervals, making it possible to detect reflected light in four directions.

The reading section unevenness pattern is, for example, a pattern in which two types of uneven pattern groups in parallel directions are arranged alternately, and in this case, ten types of unevenness patterns as shown in FIG. 6 are possible. When a photodiode detects reflected light in one direction or two directions from each uneven pattern, a corresponding number can be recognized. The correspondence among the uneven pattern of the reading section, the photodiodes to be detected, and the numbers to be recognized is as shown in FIG. 6, for example. In the case of this reading method, for example, by incorporating four uneven patterns on the reading part and determining the reading order, one
0000 types of codes can be recorded.

The uneven patterns of the reading section suitable for the reading method shown in this embodiment are those shown in FIGS. 3A and 3D, for example. It is desirable that the width 10 of the line-shaped uneven pattern group is 0.25 mm, and the width 11 of the uneven pattern is about 40 μm.

FIG. 4 is a schematic diagram showing reading of the uneven pattern A of the reading section. The uneven pattern consists of a 135 degree direction uneven pattern group 92 and a 45 degree direction uneven pattern group 94, and the reflected light 62 reflected from the 135 degree direction uneven pattern group 92 and the reflection reflected from the 45 degree direction uneven pattern group 94. Each light 64 is detected by a photodiode 7274 to recognize the number "8". Similarly, FIG. 5 is a schematic diagram showing reading of the uneven pattern D of the reading section. The uneven pattern is a 90 degree direction uneven pattern group 91
and a 135 degree direction uneven pattern group 92,
Reflected light 61 reflected from the 0 degree direction uneven pattern group 91
The reflected light 62 reflected from the 135-degree concavo-convex pattern group 92 is detected by photodiodes 71 and 72, respectively, and the number "6" is recognized.

The greatest feature of the present invention is that the reading section is integrated with the image. Since the reading unit is integrated with the image, the reading position cannot be recognized from the outside, and only the manufacturer of the reading machine can know the reading position. Furthermore, if the reading method involves scanning a reading sensor, it is difficult to determine the reading position even if the machine is disassembled and examined.

Therefore, even if an attempt is made to tamper with the device, it is extremely difficult to tamper with it because the reading portion cannot be detected.

As a method for producing the card of the present invention, a conventionally known embossing method is sufficient. That is, for example, a pattern is applied to the surface of a card with a metallic luster made by wax-laminating aluminum foil paper or metallized paper, and then a group of fine line-like uneven patterns are combined in various ways by changing the line direction little by little. The card of the present invention is produced by pressing a press plate provided with a pattern.

The card of the present invention produced as described above was fully usable for the optical mechanical reading described above, and the reading position could not be recognized from the outside.

〔Effect of the invention〕

As explained above, according to the present invention, in a card having the opal effect with a high decorative effect, and having a concave-convex pattern, the authenticity of the card can be determined even with a relatively simple device. It is possible to provide a card with a higher tamper-proofing effect.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing an example of the card of the present invention, Figure 2 is an explanatory diagram showing the positions of the reading part and non-reading part of the card in Figure 1, and Figure 3 is an explanatory diagram showing the positions of the reading part and non-reading part of the card in Figure 1. An explanatory diagram showing a concavo-convex pattern, FIG. 4 is a schematic diagram illustrating a reading method for reading the concave-convex pattern A of the reading section in FIG. 2, and FIG. 5 is a schematic diagram explaining a reading method for reading the concave-convex pattern D of the reading section in FIG. FIG. 6 is an explanatory diagram showing an example of the relationship between the uneven pattern of the reading section, the detection of the photodiode, and the corresponding numbers. 1...Card 2...Picture 3...
... Reading section uneven pattern 4 ... Non-reading section uneven pattern 5 ... Incident light 8 ... Laser oscillator 10 ... Width of uneven pattern group 11 ... Width of uneven pattern 60 61.62.64 ... Reflected light 70.7
1,72,73.74... Photodiode 91... 90 degree direction uneven pattern group 92...
... 135 degree direction uneven pattern group 94 ... 4
Patent application for 5 degree direction uneven pattern group Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 1 Figure 2 Figure 3 A Figure 3 B Figure 10 3 Figure 4 A 3 Figure 4 B Figure 5 A

Claims (1)

[Claims] 1) In a card having a concavo-convex pattern formed by arranging a plurality of groups of fine line-like concavo-convex patterns with their line directions changing little by little, any plurality of positions of the line-like concave-convex patterns constituting the picture. A card characterized in that it incorporates a coded pattern of protrusions and recesses for the purpose of optical mechanical reading.