Multilayer body with electrically controllable optically active systems of layers
First Claim
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1. A multilayer body comprising:
- an optically variable device (OVD) active first layer system having at least a diffractive optical effect; and
an electrically controllable second layer system for influencing the optical effect of the first layer system and arranged above the first layer system, the first layer system including a metallic reflective layer forming a lower electrode layer of the second layer system and exhibiting said at least diffractive optical effect;
wherein the first layer system comprises a relief structure and a metallic reflective lower electrode layer on the relief structure, which relief structure and lower electrode layer extend generally in a given direction, the relief structure comprising projections extending normal to the given direction and which projections alternate with diffraction gratings forming the diffractive optical effect in the given direction.
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Abstract
A multilayer body (1) having an optically active first layer system (10) is described, in which case the first layer system (10) is an optically variable device (OVD), and the optical effect of the first layer system (10) can be influenced by an electrically controllable second layer system (20).
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Citations
21 Claims
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1. A multilayer body comprising:
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an optically variable device (OVD) active first layer system having at least a diffractive optical effect; and an electrically controllable second layer system for influencing the optical effect of the first layer system and arranged above the first layer system, the first layer system including a metallic reflective layer forming a lower electrode layer of the second layer system and exhibiting said at least diffractive optical effect; wherein the first layer system comprises a relief structure and a metallic reflective lower electrode layer on the relief structure, which relief structure and lower electrode layer extend generally in a given direction, the relief structure comprising projections extending normal to the given direction and which projections alternate with diffraction gratings forming the diffractive optical effect in the given direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A multilayer body comprising:
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an optically variable device (OVD) active first layer system having at least a diffractive optical effect; and an electrically controllable second layer system for influencing the optical effect of the first layer system and arranged above the first layer system, the first layer system including a metallic reflective layer forming a lower electrode layer of the second layer system and exhibiting said at least diffractive optical effect; wherein the metallic reflective lower electrode layer comprises alternating projections and diffraction gratings extending in a given direction, the gratings forming said diffractive optical effect, the metallic reflective lower electrode layer on the projections being coplanar in a first plane and the diffraction gratings being coplanar in a second plane spaced from the first plane.
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21. A multilayer body comprising:
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an optically variable device (OVD) active first layer system having at least a diffractive optical effect; and an electrically controllable second layer system for influencing the optical effect of the first layer system and arranged above the first layer system, the first layer system including a metallic reflective layer forming a lower electrode layer of the second layer system and exhibiting said at least diffractive optical effect; wherein the lower electrode layer of the second layer system extends in a given direction and is divided into different areas along that direction, the different areas being electrically coupled to a voltage source for creating a field that runs with and extends in the given direction; wherein the different areas of the metallic reflective lower electrode layer comprise alternating diffractive grating electrode portions, the diffractive grating areas of the metallic reflective lower layer being formed as strips wherein alternate strips in the given direction are simultaneously connected to a voltage of opposite polarities.
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Specification