Security document with electrically-controlled display element
First Claim
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1. A security document, comprising:
- a carrier; and
a multi-layer flexible film body applied to the carrier, the multi-layer flexible film body including, apart from the carrier, an electrically controlled display element for generating an optical security feature, an electrical current source for operation of the display element and an optically active diffractive structure, wherein the display element has a plurality of differently coloured and differently charged particles which are arranged between two electrode layers, wherein at least one of the optically active diffractive structure and a microstructure is arranged in overlapping relationship with the electrically controlled display element, wherein an optical appearance of an optical effect produced by at least one of the optically active diffractive structure and the microstructure is controlled by the electrically controlled display element, the multi-layer flexible film body having a replication lacquer layer with the optically active diffractive structure shaped therein for producing an optical-diffraction feature, wherein the security document has an adhesive layer securing the multi-layer flexible film body to the carrier, the optically active diffractive structure being arranged at least region-wise substantially overlapping the entire electrical current source, andwherein the electrical current source is a solar cell, andwherein at least one of the two electrode layers affords the function of an electrode to the display element, an electronic circuit and the solar cell.
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Abstract
The invention concerns a security document comprising a flexible carrier and a multi-layer flexible film body which is applied to the flexible carrier and which provides one or more optical security features. The flexible multi-layer film body has an electrically controller display element for generating an optical security feature with associated electrical current source for operation of the display element in combination with an optically active diffractive structure.
35 Citations
20 Claims
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1. A security document, comprising:
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a carrier; and a multi-layer flexible film body applied to the carrier, the multi-layer flexible film body including, apart from the carrier, an electrically controlled display element for generating an optical security feature, an electrical current source for operation of the display element and an optically active diffractive structure, wherein the display element has a plurality of differently coloured and differently charged particles which are arranged between two electrode layers, wherein at least one of the optically active diffractive structure and a microstructure is arranged in overlapping relationship with the electrically controlled display element, wherein an optical appearance of an optical effect produced by at least one of the optically active diffractive structure and the microstructure is controlled by the electrically controlled display element, the multi-layer flexible film body having a replication lacquer layer with the optically active diffractive structure shaped therein for producing an optical-diffraction feature, wherein the security document has an adhesive layer securing the multi-layer flexible film body to the carrier, the optically active diffractive structure being arranged at least region-wise substantially overlapping the entire electrical current source, and wherein the electrical current source is a solar cell, and wherein at least one of the two electrode layers affords the function of an electrode to the display element, an electronic circuit and the solar cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification