Ultrasonic fingerprint sensor and operation method thereof
AssigneeEgis Technology Inc.
InventorDi Bao Wang
Life of this patent
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Abstract
An ultrasonic fingerprint sensor and an operation method thereof are provided. The ultrasonic fingerprint sensor is adapted to be disposed under a panel of a terminal device. The ultrasonic fingerprint sensor includes an ultrasonic fingerprint sensing array and a controller. The ultrasonic fingerprint sensing array transmits a test ultrasonic signal toward the panel. The controller is coupled to the ultrasonic fingerprint sensing array. The controller determines whether a protective layer is attached to a top of the panel based on a number of echo signals corresponding to the test ultrasonic signal.
Claims34
An ultrasonic fingerprint sensor adapted to be disposed under a panel of a terminal device, wherein the ultrasonic fingerprint sensor comprises:
- an ultrasonic fingerprint sensing array transmitting a test ultrasonic signal toward the panel;
- and
- a controller circuit coupled to the ultrasonic fingerprint sensing array,
- wherein the controller circuit determines whether a protective layer is attached to a top of the panel based on a number of echo signals corresponding to the test ultrasonic signal.
An operation method of an ultrasonic fingerprint sensor, wherein the ultrasonic fingerprint sensor is adapted to be disposed under a panel of a terminal device, and the operation method comprises:
- transmitting a test ultrasonic signal toward the panel through an ultrasonic fingerprint sensing array;
- and
- determining whether a protective layer is attached to a top of the panel based on a number of echo signals corresponding to the test ultrasonic signal.
Dependencies are inferred from the claim text.