Document with an Integrated Display Device

• US 20100295878A1
• Filed: 11/04/2008
• Published: 11/25/2010
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: Bundesdruckerei GmbH (Government of Germany)
• Original Assignee: Bundesdruckerei GmbH (Government of Germany)
• Inventors: Pflughoefft, Malte, Paeschke, Manfred, Muth, Oliver, Mathea, Arthur, Fischer, Jörg
• Granted Patent: US 8,384,628 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: B42D 2033/44 combined with other objects
• CPC Class Codes: B42D 25/00 Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof printing processes to produce identification or security features B41M3/14
• CPC Class Codes: B42D 25/305 Associated digital information record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: G06K 19/07703 the interface being visual
• CPC Class Codes: G07D 7/12 Visible light, infrared or ultraviolet radiation
• CPC Class Codes: G09G 2300/06 Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 3/04 for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Abstract

A document including an integrated display device that has several triggerable display elements, each of which is designed to emit an optical signal for representing first data stored in the document whereby the display device is designed for cyclical activation of the display elements for rendering the first data in sequential image regeneration periods, and whereby the display device is designed in such a way that the emission of the optical signals of at least a subset of the display element takes place with a chronological delay, whereby it is not possible to visually perceive the chronological delay.

Claims

1. A document comprising an integrated display device, that comprises several display elements that can be activated, whereby each of the display elements is designed to emit an optical signal for a rendering of the first data that are stored in the document, whereby the display device is designed for cyclical activation of the display elements for rendering the first data in sequential image regeneration periods, and whereby the display device is designed in such a way that the emission of the optical signals of at least a subset of the display element takes place with a chronological delay, whereby it is not possible to visually perceive the chronological delay and whereby information is coded into the length of the chronological delay and whereby information is coded into the configuration of the display elements of the subset.

6. A document according to claim 1 comprising means for delaying the activation of the display elements that belong to the subset.

8. A document according to claim 1, whereby the display elements are located in an active matrix, whereby each of the display elements has an associated activation circuit, and whereby the activation circuits of the display elements that belong to the subset include means for delaying the activation.

10. A document according to claim 1, whereby the display elements of the subset have a response characteristic that leads to the delay and whereby the display elements are provided with a luminescent substance for generating the optical signal, and whereby the display elements of the subset have a first host crystal for the luminescent substance and whereby the remaining display elements that do not belong to the subset have a second host crystal for receiving the luminescent substance, whereby the first and second host crystals are different.

12. A document according to claim 1, whereby the display device is provided with a section in which no display elements of the subset are located.

16. A document according to claim 1, whereby as a result of the chronological delay, information is displayed, whereby the information is changeable chronologically and with means to vary the chronological delay for displaying the chronologically changeable information.

17. A document according to claim 1, whereby the document comprises an integrated electronic circuit and a memory for storing data in need of protection and means for executing a cryptographic protocol, and with an interface to a reader, whereby access of the reader to the data in need of protection via the interface requires the execution of the cryptographic protocol with the help of the information.

18. A document according to claim 1, whereby it is an electronic identification of a motor vehicle.

19. A document according to claim 1, whereby the first data are an identification of a vehicle and whereby as a result of the chronological delay, information is displayed, whereby this information is a vehicle parameter and/or a fee status.

20. A reader for a document according to claim 1 comprising an optical sensor for capturing the chronological delay of the emission of the optical signals by the subset of the display elements.

21. A reader according to claim 20, whereby the capturing of the chronological delay takes place by capturing a time-resolved intensity profile of the radiation emitted by the display elements.

24. A reader according to claim 20, comprising means for verification of the document with the help of the chronological delays captured by the display device.

25. A reader according to claim 20 comprising means for executing a cryptographic protocol and an interface for communication with the document, whereby access to the data that is in need of protection of the document requires that the cryptographic protocol has been executed successfully with the help of information captured by the chronological delay.

27. A method for the verification of a document according to claim 1 including the following steps:

capturing the chronological delays of the emission of the optical signals by the display elements of the subset in an image regeneration period,

reviewing reference information with the help of the chronological delay.

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