Biometric sensing device with isolated piezo ceramic elements
First Claim
1. An apparatus for sensing biometric information in a finger, comprising:
- an array of discrete piezo ceramic elements responsive to acoustic characteristics of parts of the finger; and
filler distributed between said discrete piezo ceramic elements, said filler providing acoustic attenuation and electric isolation between said discrete piezo ceramic elements.
2 Assignments
0 Petitions
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 pattern of the finger acts as an acoustic barrier. A backing layer (air or foam) can also be provided.
-
Citations
23 Claims
-
1. An apparatus for sensing biometric information in a finger, comprising:
-
an array of discrete piezo ceramic elements responsive to acoustic characteristics of parts of the finger; and
filler distributed between said discrete piezo ceramic elements, said filler providing acoustic attenuation and electric isolation between said discrete piezo ceramic elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A biometric sensing apparatus, comprising:
-
a piezoelectric ceramic sensor; and
a processor, coupled said sensor, that receives an input from said sensor and produces an output, wherein said sensor comprises an array of piezoelectric ceramic elements and includes a sonic barrier between each of said elements. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
-
-
23. An apparatus for sensing biometric information in a finger, comprising:
-
an array of discrete piezo ceramic elements responsive to acoustic characteristics of parts of the finger; and
material distributed between said discrete piezo ceramic elements, said material providing acoustic attenuation and electric isolation between said discrete piezo ceramic elements.
-
Specification