Fingerprint sensor and method thereof
AssigneeEgis Technology Inc.
InventorTodd Lin
Life of this patent
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Abstract
Disclosed are a fingerprint sensor and a fingerprint sensing method thereof. The fingerprint sensor comprises a substrate, a plurality of sensing electrodes, an integrated circuit and a protection layer. The substrate has a first surface and a second surface. The sensing electrodes are configured on the first surface of the substrate, and electrically connected to the integrated circuit. The integrated circuit comprises a plurality of phase shifters, and each phase shifter is electrically connected to its corresponding sensing electrode to control the phase of electric signal transmitted by the sensing electrode. The first surface of the substrate is covered by the protection layer.
Claims12
A fingerprint sensor, comprising:
- a substrate, having a first surface and a second surface;
- a plurality of sensing electrodes, disposed on the first surface of the substrate and configured to transmit and receive electric signals;
- an integrated circuit disposed on the first surface of the substrate, the sensing electrodes being electrically connected to the integrated circuit;
- and
- a protection layer, covering upon the first surface of the substrate;
- wherein the integrated circuit comprises a plurality of phase shifters and each of the phase shifters is electrically connected to one of the sensing electrodes correspondingly, and when a part of the sensing electrodes are turned on, the phase shifters respectively control the corresponding turned-on sensing electrodes to adjust the phases of the electrical signals generated by the turned-on sensing electrodes, such that the wave fronts of the electric signals transmitted by the turned-on sensing electrodes are converged.
A fingerprint sensing method, applied in a fingerprint sensor, comprising:
- turning on a first part of sensing electrodes on a substrate;
- controlling, via a plurality of phase shifters, the first part of sensing electrodes to adjust the phases of the electrical signals generated by the first part of sensing electrodes, wherein each of the phase shifters is respectively corresponding to one of the first part of the sensing electrodes;
- transmitting the electrical signals to travel through a protection layer covering upon the substrate to the user's finger surface;
- and
- receiving the electric signals reflected from the user's finger surface by a second part of the sensing electrodes on the substrate;
- wherein each of the phase shifters is electrically connected to one of the sensing electrodes correspondingly, to control the phase of the electric signal transmitted by the corresponding turned-on sensing electrode, such that the wave fronts of the electric signals transmitted by the turned-on sensing electrodes are converged.
Dependencies are inferred from the claim text.