Single transducer fingerprint system
AssigneeQUALCOMM Incorporated
InventorAshish Hinger
Life of this patent
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Abstract
Disclosed herein are techniques for generating an image of a target object using a sensor. The sensor includes a substrate and a single transceiver. The transceiver includes a first electrode, a second electrode, and a layer of electrical material positioned between the two electrodes. The transceiver also includes a control unit configured to switch the transceiver into a transmit mode or a receive mode. The transceiver further includes a receiving circuit configured to receive, store, and output a detection signal caused by an interaction between the sensor and the target object. The second electrode, the control unit, and the receiving circuit can be formed on the substrate.
Claims30
A sensor comprising:
- a substrate;
- and
- a transceiver coupled to a first side of the substrate,
- wherein the transceiver comprises:
- a single pair of electrodes including a first electrode and a second electrode, and
- a layer of electrical material positioned between the first electrode and the second electrode;
- wherein the transceiver is configured to, in response to receiving a plurality of excitation signal pulses on the first electrode, generate a plurality of transmission signal pulses for transmitting towards the substrate in a transmit mode, the plurality of transmission signal pulses, when reflected, causing a formation of a standing wave signal inside the substrate and the transceiver;
- and
- wherein the transceiver is further configured to generate a detection signal in a receive mode, the detection signal generated by the layer of electrical material in response to a change in the standing wave signal caused by an interaction between the plurality of transmission signal pulses and a target object.
A method for generating an image of a target object, the method comprising:
- applying a plurality of excitation signal pulses to a first electrode of a transceiver in a transmit mode, wherein the transceiver comprises:
- a single pair of electrodes including the first electrode and a second electrode;
- and
- an electrical material layer positioned between the first electrode and the second electrode;
- generating and transmitting, by the transceiver in response to receiving the plurality of excitation signal pulses, a plurality of transmission signal pulses towards a substrate, wherein the plurality of transmission signal pulses, when reflected, causes a formation of a standing wave signal inside the substrate and the transceiver;
- and
- generating, by the transceiver, a detection signal in a receive mode, the detection signal generated by the electrical material layer of the transceiver in response to a change in the standing wave signal caused by an interaction between the plurality of transmission signal pulses and the target object.
An apparatus comprising:
- means for applying a plurality of excitation signal pulses to a first electrode of a transceiver in a transmit mode, wherein the transceiver comprises:
- a single pair of electrodes including the first electrode and a second electrode;
- and
- an electrical material layer positioned between the first electrode and the second electrode;
- means for generating and transmitting a plurality of transmission signal pulses towards a substrate in response to receiving the plurality of excitation signal pulses, wherein the plurality of transmission signal pulses, when reflected, causes a formation of a standing wave signal inside the substrate and the transceiver;
- and
- means for generating a detection signal in a receive mode, in response to a change in the standing wave signal caused by an interaction between the plurality of transmission signal pulses and a target object.
A non-transitory computer-readable storage medium comprising machine-readable instructions stored thereon, the instructions, when executed by one or more processing units, causing the one or more processing units to:
- connect, via a switch, a first electrode of a transceiver to a bias voltage in a transmit mode, wherein the transceiver comprises:
- a single pair of electrodes including the first electrode and a second electrode;
- and
- an electrical material layer positioned between the first electrode and the second electrode;
- apply a plurality of excitation signal pulses to the second electrode of the transceiver in the transmit mode, wherein the transceiver is configured to generate and transmit a plurality of transmission signal pulses towards a substrate in response to receiving the plurality of excitation signal pulses, the plurality of transmission signal pulses, when reflected, causing a formation of a standing wave signal inside the substrate and the transceiver;
- connect, via the switch, the first electrode of the transceiver to a receiving circuit in a receive mode;
- and
- control, in the receive mode, the transceiver and the receiving circuit to generate and store a detection signal associated with a change in the standing wave signal caused by an interaction between the plurality of transmission signal pulses and a target object.
Dependencies are inferred from the claim text.