Ultrasonic sensing device for touch detection
AssigneeCypress Semiconductor Corporation
InventorsVasyl Mandziy, Andriy Maharyta, Oleksandr Karpin
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Abstract
A system and method of ultrasonic sensing of events through a coupling substrate. The method includes receiving a first echo signal from a first interface of a touch substrate and a second ultrasound signal from a second interface of the touch substrate. The method includes generating a response signal based on the second ultrasound signal and a baseline signal. The method includes detecting an event associated with the substrate based on the response signal. The method includes providing a notification indicating the event.
Claims18
A method comprising:
- receiving a first ultrasound signal from a first interface of a substrate and a second ultrasound signal from a second interface of the substrate;
- calculating a time interval based on at least one of a first amplitude of the first ultrasound signal or a second amplitude of the second ultrasound signal;
- and
- adjusting a starting time to sample the second ultrasound signal based on the time interval to increase an amplitude difference between the first ultrasound signal and the second ultrasound signal;
- generating a response signal based on the second ultrasound signal and a baseline signal;
- detecting an event associated with the substrate based on the response signal;
- and
- providing a notification indicating the event.
An integrated circuit, comprising:
- an ultrasound sensing device configured to receive a first ultrasound signal from a first interface of a substrate and a second ultrasound signal from a second interface of the substrate;
- and
- a processing device coupled to the ultrasound sensing device, wherein the processing device is configured to:
- calculate a time interval based on at least one of a first amplitude of the first ultrasound signal or a second amplitude of the second ultrasound signal;
- and
- adjust a starting time to sample the second ultrasound signal based on the time interval to increase an amplitude difference between the first ultrasound signal and the second ultrasound signal;
- generate a response signal based on the second ultrasound signal and a baseline signal;
- detect an event associated with the substrate based on the response signal;
- and
- provide a notification indicating the event.
A method comprising:
- receiving a first ultrasound signal from a first interface of a substrate and a second ultrasound signal from a second interface of the substrate, wherein the substrate comprises at least one of metal, wood, or plastic;
- calculating a time interval based on at least one of a first amplitude of the first ultrasound signal or a second amplitude of the second ultrasound signal;
- and
- adjusting a starting time to sample the second ultrasound signal based on the time interval to increase an amplitude difference between the first ultrasound signal and the second ultrasound signal;
- generating a response signal based on the second ultrasound signal and a baseline signal;
- and
- detecting an event associated with the substrate based on the response signal.
Dependencies are inferred from the claim text.