User interface unit, smart card and manufacturing method
First Claim
1. A user interface unit for a smart card, said user interface unit comprising a two-dimensional capacitive sensor array, wherein the capacitive sensor array comprises an array of corner sensor elements each comprising a capacitor over an area associated with each corner sensor element, wherein the respective capacitors of neighbouring corner sensor elements in each dimension extend towards each other thereby defining at least one intermediate region therebetween, the area of the or each intermediate region covered by the respective capacitors being in a respective fixed ratio.
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Abstract
There is disclosed a user interface unit for a smart card, said user interface unit comprising a two-dimensional capacitive sensor array, wherein the capacitive sensor array comprises an array of corner sensor elements each comprising a capacitor over its area, wherein the respective capacitors of neighboring corner sensor elements in each dimension extend towards each other thereby defining at least one intermediate region therebetween, the area of the or each intermediate region covered by the respective capacitors being in a respective fixed ratio. Furthermore, there is disclosed a corresponding smart card and a method of manufacturing a user interface unit for a smart card.
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Citations
15 Claims
- 1. A user interface unit for a smart card, said user interface unit comprising a two-dimensional capacitive sensor array, wherein the capacitive sensor array comprises an array of corner sensor elements each comprising a capacitor over an area associated with each corner sensor element, wherein the respective capacitors of neighbouring corner sensor elements in each dimension extend towards each other thereby defining at least one intermediate region therebetween, the area of the or each intermediate region covered by the respective capacitors being in a respective fixed ratio.
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15. A method of manufacturing a user interface unit for a smart card, the method comprising providing the user interface unit with a two-dimensional capacitive sensor array and providing the capacitive sensor array with an array of corner sensor elements each comprising a capacitor over an area associated with each corner sensor element, wherein the respective capacitors of neighbouring corner sensor elements in each dimension extend towards each other thereby defining at least one intermediate region therebetween, the area of the or each intermediate region covered by the respective capacitors being in a respective fixed ratio.
Specification