Roll-to-roll compatible pressure sensitive event sensing label
First Claim
1. A layer structure comprising:
- a stack of a first, a second and a third layer;
each of said first and third layers comprising;
a flexible material that is made of a material selected from a group consisting of;
an electrically conductive material, and a semiconductive material;
wherein the second layer comprises a flexible, deformable and compressible material,wherein said second layer is electrically less conductive than said first and third layers;
wherein said second layer is arranged between said first and said third layer; and
a first electrode arranged on said first layer and a second electrode arranged on said third layer wherein said second layer is a non-conductive spacer grid having air voids.
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Accused Products
Abstract
The present invention discloses a smart label to be affixed on or integrated in an object and able to provide an electrical signal indicative of the applied pressure or force and/or the position of the applied pressure or force at a touch point on the object to which the label is affixed. The smart label comprises a layer structure and a detector system, the layer structure comprising of at least a stack of a first, a second and a third layer. The first and third layers comprise a flexible, electrically conductive or semiconductive material and at least two electrodes for connecting the layers to the detector system. The second layer comprises a flexible, deformable and compressible material. The second layer is electrically nonconductive or electrically conductive but less conductive than the first and third layers, wherein the second layer separates the first and third layers.
77 Citations
16 Claims
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1. A layer structure comprising:
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a stack of a first, a second and a third layer; each of said first and third layers comprising; a flexible material that is made of a material selected from a group consisting of; an electrically conductive material, and a semiconductive material; wherein the second layer comprises a flexible, deformable and compressible material, wherein said second layer is electrically less conductive than said first and third layers; wherein said second layer is arranged between said first and said third layer; and a first electrode arranged on said first layer and a second electrode arranged on said third layer wherein said second layer is a non-conductive spacer grid having air voids. - View Dependent Claims (2, 3, 4, 5, 16)
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6. A layer structure comprising:
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a stack of a first, a second and a third layer; each of said first and third layers comprising; a flexible material that is selected from a group consisting of;
an electrically conductive, and a semiconductive material;wherein the second layer comprises a flexible, deformable and compressible material, wherein said second layer is electrically less conductive than said first and third layers; wherein said second layer is arranged between said first and said third layer; and a first electrode arranged on said first layer and a second electrode arranged on said third layer; wherein said first and said third layers have anisotropic conductivity such that said first and said third layers have a gradient of increased conductivity in at least one of a vertical and horizontal direction. - View Dependent Claims (14, 15)
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7. A smart label, comprising:
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a layer structure; and a detector system said layer structure comprising; a stack of a first, a second and a third layer; each of said first and third layers comprising; a flexible material that is made of only one of a electrically conductive, and semiconductive material; wherein the second layer comprises a flexible, deformable and compressible material, wherein said second layer is electrically less conductive than said first and third layers; wherein said second layer is arranged between said first and said third layer; a first electrode arranged on said first layer and a second electrode arranged on said third layer; said detector system comprising; detecting electronics; and an electrical power supply coupled with said detecting electronics for powering said detecting electronics, wherein at least one of said detecting electronics and said power supply is operatively coupleable with said layer structure; wherein the application of force on the planar surface of said smart label results in a change in the distance between said first and said third layer and therefore in a corresponding change in the electrical resistance value measurable between said first and second electrodes; and wherein said change in the electrical resistance value is detectable by said detector system. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for determining either one or both the position and the pressure applied on layer structure that comprises:
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a stack of a first, a second and a third layer; each of said first and third layers comprising; a flexible material that is selected from a group consisting of;
an electrically conductive material, and a semiconductive material;wherein the second layer comprises a flexible, deformable and compressible material, wherein said second layer is electrically less conductive than said first and third layers; wherein said second layer is arranged between said first and said third layer; said layer structure further comprising; a first electrode arranged on said first layer and a second electrode arranged on said third layer; and wherein said method comprises applying a force on the planar surface of said smart label; determining the change of the electrical resistance value measurable between said first and second electrode, wherein said change corresponds in a change of the distance between said first and said third layer; and determining, based on the change in the analog resistance signal measured between said first and said second electrode, either one or both of the following;
the position, and the pressure applied on said layer structure.
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Specification