MUT fingerprint ID system
First Claim
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1. A MEMS ultrasound fingerprint ID system configured to detect both epidermis and dermis fingerprint patterns in three dimensions, the system comprising:
- a) a micromachined ultrasonic transducer (MUT) transmitter-receiver array comprising MUTs that apply an acoustic signal to a finger;
b) a coupling material disposed on the MUT transmitter-receiver array;
c) a voltage driver that applies a voltage to the array;
d) circuitry connected to the array; and
e) a data processor that receives and processes a signal from the array to produce an image of a fingerprint,wherein the system is configured to drive MUTs in the MUT transmitter-receiver array in groups and scan the acoustic signal by switching excitation of the MUTs from group to group in sequence, andwherein a focus diameter of the acoustic signal is determined by a pitch between the MUTs in the group and a frequency of the MUTs in the group.
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Abstract
MEMS ultrasound fingerprint ID systems are provided. Aspects of the systems include the capability of detecting both epidermis and dermis fingerprint patterns in three dimensions. Also provided are methods of making and using the systems, as well as devices that include the systems.
17 Citations
20 Claims
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1. A MEMS ultrasound fingerprint ID system configured to detect both epidermis and dermis fingerprint patterns in three dimensions, the system comprising:
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a) a micromachined ultrasonic transducer (MUT) transmitter-receiver array comprising MUTs that apply an acoustic signal to a finger; b) a coupling material disposed on the MUT transmitter-receiver array; c) a voltage driver that applies a voltage to the array; d) circuitry connected to the array; and e) a data processor that receives and processes a signal from the array to produce an image of a fingerprint, wherein the system is configured to drive MUTs in the MUT transmitter-receiver array in groups and scan the acoustic signal by switching excitation of the MUTs from group to group in sequence, and wherein a focus diameter of the acoustic signal is determined by a pitch between the MUTs in the group and a frequency of the MUTs in the group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification
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Current AssigneeRegents of the University of California (University of California)
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Original AssigneeRegents of the University of California (University of California)
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InventorsLu, Yipeng, Horsley, David, Tang, Hao-Yen, Boser, Bernhard
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Primary Examiner(s)Dougherty, Thomas M
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Application NumberUS14/896,150Publication NumberTime in Patent Office1,905 DaysField of Search310334, 310338US Class CurrentCPC Class CodesG06V 40/1306 non-optical, e.g. ultrasoni...
