Multiple scan element array ultrasonic biometric scanner
First Claim
1. An ultrasonic biometric scanner, comprising:
- an ultrasonic multiple scan element array including multiple scan elements, comprising;
piezoelectric material having a first surface and a second surface opposing the first surface;
a first electrode positioned on the first surface; and
a second electrode positioned on the second surface;
a substrate electrically coupled to the second electrode; and
a cover positioned over the first electrode;
wherein;
at least one of the first electrode or the second electrode include multiple electrodes wherein the number of the multiple electrodes corresponds to a number of the multiple scan elements;
the substrate is acoustically coupled to the piezoelectric material and configured to absorb the ultrasonic signal; and
the ultrasonic biometric scanner is operable to obtain a biometric scan of a body part via the cover by causing the piezoelectric material to emit an ultrasonic signal.
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Accused Products
Abstract
An ultrasonic biometric scanner includes an ultrasonic multiple scan element array with multiple scan elements. The array includes piezoelectric material such as lead zirconate titanate or polyvinylidene difluoride with a first electrode on a first surface and a second electrode on a second, opposite surface. At least one of the first electrode or the second electrode include multiple electrodes wherein the number of the multiple electrodes corresponds to a number of the multiple scan elements. A substrate is electrically coupled to the second electrode and/or the first electrode. A cover may be positioned over the first electrode. The cover has an acoustic impedance matching ultrasonic signals emitted by the piezoelectric material.
121 Citations
20 Claims
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1. An ultrasonic biometric scanner, comprising:
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an ultrasonic multiple scan element array including multiple scan elements, comprising; piezoelectric material having a first surface and a second surface opposing the first surface; a first electrode positioned on the first surface; and a second electrode positioned on the second surface; a substrate electrically coupled to the second electrode; and a cover positioned over the first electrode; wherein; at least one of the first electrode or the second electrode include multiple electrodes wherein the number of the multiple electrodes corresponds to a number of the multiple scan elements; the substrate is acoustically coupled to the piezoelectric material and configured to absorb the ultrasonic signal; and the ultrasonic biometric scanner is operable to obtain a biometric scan of a body part via the cover by causing the piezoelectric material to emit an ultrasonic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An electronic device, comprising:
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an exterior surface having an interior portion and an exterior portion; and an ultrasonic biometric scanner, comprising; an ultrasonic multiple scan element array including multiple scan elements, comprising; piezoelectric material having a first surface and a second surface opposing the first surface; a first electrode positioned on the first surface; and a second electrode positioned on the second surface; a substrate electrically coupled to the second electrode, the substrate acoustically coupled to the piezoelectric material; a stiffener acoustically coupled to the substrate; and a cover positioned over the first electrode, the cover coupled to the interior portion of the exterior surface; wherein; at least one of the first electrode or the second electrode include multiple electrodes wherein the number of the multiple electrodes corresponds to a number of the multiple scan elements; the ultrasonic biometric scanner is operable to obtain a biometric scan of a body part via the exterior surface by causing the piezoelectric material to emit an ultrasonic signal; and the stiffener is configured to absorb the ultrasonic signal. - View Dependent Claims (18)
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19. An ultrasonic biometric scanner, comprising:
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an ultrasonic multiple scan element array including multiple scan elements, comprising;
piezoelectric material having a first surface and a second surface opposing the first surface;a first electrode positioned on the first surface; and
a second electrode positioned on the second surface;
a substrate electrically coupled to the second electrode; anda cover positioned over the first electrode; wherein; the second electrode includes multiple electrodes wherein the number of the multiple electrodes corresponds to a number of the multiple scan elements; the piezoelectric material includes notches defined in the second surface positioned between the multiple electrodes; the ultrasonic biometric scanner is operable to obtain a biometric scan of a body part via the cover by causing the piezoelectric material to emit an ultrasonic signal; and the substrate is acoustically coupled to the piezoelectric material and configured to absorb the ultrasonic signal. - View Dependent Claims (20)
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Specification