WO2002025578A1

WO2002025578A1 - Transparent data carrier in card form

Info

Publication number: WO2002025578A1
Application number: PCT/EP2001/011068
Authority: WO
Inventors: Dieter Ebert
Original assignee: Xetos Ag
Priority date: 2000-09-25
Filing date: 2001-09-25
Publication date: 2002-03-28
Also published as: AU2002215899A1; DE10047359A1; EP1323124A1

Abstract

The invention relates to a data carrier in card form, carrying a piece of information which is visible and/or invisible from the outside. In order to increase the copy protection in a cost-effective manner, the data carrier is largely transparent.

Description

Data carriers in card form

The invention relates to a data carrier in the form of a card, for example an identity card, a check or credit card, a security card, a health card, a club card, a computer card, a ticket, an insurance card, a card with a value unit memory, a key card, one Customer card, etc. Information is visible and / or invisible on the data carrier. For example, image and / or text data can be encoded and / or uncoded, printed, embossed, punched, or otherwise applied on such data carriers.

Such data carriers are often to be protected against subsequent manipulation or copying. Various measures are already known as copy protection, for example to permanently attach holograms in the form of small seals on the outside of a card, which cannot be copied with commercially available copying machines.

The invention has for its object to protect the data carrier in card form inexpensively against simple copying.

The invention solves this problem with the subject matter of claim 1. Further preferred embodiments of the invention are described in the subclaims. According to this, the data carrier in card form, which carries information which is visible and / or invisible from the outside, is designed to be transparent overall. This advantageously makes it difficult to copy the card, since, if at all, copying onto transparent materials as copying media with commercially available copiers is only possible with a significant loss in quality. The information is visually applied, and can be read from both outside due to the transparency. In addition, information can, for example, still be stored invisibly on a magnetic strip, which can be read from the outside by means of a suitable reading device. Then the card in the area of the magnetic strip can also be non-transparent when using a non-transparent magnetic strip. However, the visible information occupies a small area compared to the entire card body, so that the transparent property of the entire card predominates. The entire card can also be completely transparent, the card then containing invisible information which can only be read out, for example, using a special reading device, a laser with a specific narrow frequency range (infrared, ultraviolet, etc.), etc.

The data carrier is preferably designed as a laminate of a plurality of transparent layers, the information visible from the outside being applied to one of the inner layers of the laminate. This advantageously increases the copy security, since it is therefore not easy to copy onto a transparent plastic film, in which the toner or ink would then be applied to an outside of the film after copying and not inside the card, which is due to the appearance the card can be easily checked.

For the purpose of increased copy protection, the data carrier preferably has a structure which diffracts, refracts, absorbs, scatters and / or reflects. These can be, for example, metal foils and / or a transparent area with an embossed diffraction grating that, depending on the viewing angle, reflects and / or transmits the light in different colors. The light diffractive structure can be, for example

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1

(Volume hologram formed by the Bragg plane). Due to its unique appearance (shimmering transmission hologram in rainbow colors and a usually single-color reflection hologram), this combination represents a particularly well recognizable security feature that is difficult to copy on the one hand and easy to identify on the other. For further details regarding the combination of these two types of hologram, reference is made to German patent application 199 24 385.9 by the same applicant.

For the purpose of lower production costs of the card, it is preferably designed as a mono card. The information can be visibly impressed into the transparent, single-layer card body, punched out or the like. his. The light diffractive and / or refractive structure is particularly preferably contained in the individual layer of the monocard.

The data carrier preferably has an actively illuminated area as a further security feature against unwanted copying. The actively illuminating area can be a luminous polymer or an organic light-emitting diode (OLED), the OLED preferably being supplied with electricity via an induction field embedded in the card.

The invention and further features and advantages of the invention will now be explained in more detail on the basis of preferred exemplary embodiments.

According to this embodiment, the starting material for the production of the card is a transparent plastic film with a certain thickness, which can be, for example, 0.25 mm. Card-sized sections are punched out of this transparent plastic film. These can then be printed on one side with a lettering and / or an image using a suitable printer. A laser diffraction pattern in the form of a transmission hologram can then be written into further punched sections. The diffraction strips arise, for example, from local changes in the refractive index of the plastic film.

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Claims

Expectations :

1. Data carrier in card form, which carries information that is visible and / or invisible from the outside, characterized in that the entire data carrier is transparent.

2. Data carrier in card form according to claim 1, which is designed as a laminate from a plurality of transparent layers, the information visible from the outside being applied to one of the inner layers of the laminate. |

3. Data carrier in card form according to claim 1 or 2, which further has a light diffractive, refractive, absorbing, scattering and / or reflecting structure.

4. Data carrier in card form according to claim 3, in which the light diffractive or refractive structure is a hologram.

5. Data carrier in card form according to claim 4, in which the hologram is designed as a hologram that can be read out in transmission.

6. Data carrier in card form according to claim 3, in which the light diffractive or refractive structure is designed as a combination of a transmission and reflection hologram.

7. Data carrier in card form according to one of the preceding claims, which is designed as a single card.

8. Data carrier in card form according to claim 7, in which the light diffractive or refractive structure is contained in the single layer of the monocard.

9. Data carrier in card form according to one of the preceding claims, which further comprises an actively illuminated area.

10. Data carrier in card form according to claim 9, in which the actively illuminating area is a luminous polymer.

11. Data carrier in card form according to claim 10, in which the actively illuminating area is an organic light-emitting diode (OLED).

12. Data carrier in card form according to claim 10, in which the OLED is electrically supplied via an induction field embedded in the card.