Biometric sensing device with isolated piezo ceramic elements
First Claim
1. A method for sensing biometric information in a digit, comprising:
- piezo electrically sensing acoustic characteristics of the digit via an array of discrete piezo ceramic elements; and
facilitating (i) acoustic attenuation and (ii) electrical isolation between the discrete piezo ceramic elements by distributing a filler therebetween.
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Accused Products
Abstract
The present invention provides an apparatus for sensing biometric information in a finger with piezo ceramic elements. In one embodiment, the apparatus includes an array of discrete piezo ceramic elements and filler. The array of discrete piezo ceramic elements is responsive to acoustic characteristics of parts of the finger. The filler is distributed between the discrete piezo ceramic elements and provides acoustic attenuation and electric isolation between the discrete piezo ceramic elements. A protective layer can receive a ridge pattern of the finger positioned proximate to the array. Air in valleys between ridges of the ridge patten of the finger acts as an acoustic barrier. A backing layer (air or foam) can also be provided.
101 Citations
23 Claims
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1. A method for sensing biometric information in a digit, comprising:
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piezo electrically sensing acoustic characteristics of the digit via an array of discrete piezo ceramic elements; and
facilitating (i) acoustic attenuation and (ii) electrical isolation between the discrete piezo ceramic elements by distributing a filler therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 22)
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15. A method for performing biometric sensing, comprising:
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piezo electrically sensing via a ceramic sensor; and
performing processing via a processor, coupled the sensor, configured to receive an input from the sensor and produce an output;
wherein the sensor comprises an array of piezoelectric ceramic elements and includes a sonic barrier between each of the elements. - View Dependent Claims (16, 17, 18, 19, 20)
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23. A method for sensing biometric information in a digit, comprising:
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piezo electrically sensing via an array of discrete piezo ceramic elements responsive to acoustic characteristics of parts of the digit; and
distributing a material between the discrete piezo ceramic elements to provide acoustic attenuation and electric isolation therebetween.
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Specification