Fingerprint sensor array having duplex sensor cells
AssigneeSilead Inc.
InventorTaiyi Cheng
Life of this patent
Estimating the term…
Abstract
A fingerprint sensing device comprises a substrate and an array of sensor cells formed over the substrate. The sensor cells are divided into multiple groups. Each group is associated with a group-identifiable signal. The sensor cells in each group are configured to transmit the group-identifiable signal of the respective group and are further configured to simultaneously receive the group-identifiable signals transmitted by the sensor cells in other groups. The group-identifiable signals are orthogonal with respect to each other.
Claims20
A fingerprint sensing device, comprising:
- a substrate;
- and
- an array of sensor cells formed over the substrate, wherein the sensor cells are divided into multiple groups;
- each group is associated with a group-identifiable signal;
- the sensor cells in each group are configured to transmit the group-identifiable signal of the respective group and are further configured to simultaneously receive the group-identifiable signals transmitted by the sensor cells in other groups;
- and the group-identifiable signals are orthogonal with respect to each other.
A fingerprint sensing device, comprising:
- a substrate;
- an array of sensor cells formed over the substrate;
- and
- a controller integrated with the sensor cells, and designed to collect capacitances sensed by the sensor cells, wherein:
- the sensor cells are divided into multiple groups;
- the sensor cells in each group are configured to transmit a group-identifiable signal and to receive group-identifiable signals transmitted by the sensor cells of other groups;
- each sensor cell is configured to assign different weights to the group-identifiable signals that it receives from the sensor cells of the other groups based on a distance between this sensor cell and the sensor cells of the other groups;
- and
- the group-identifiable signals are orthogonal in frequency or in code.
A fingerprint sensing device, comprising:
- a substrate;
- an array of sensor cells formed over the substrate and configured into rows and columns, and
- a controller integrated with the sensor cells, and designed to collect capacitances detected by the sensor cells, wherein:
- the sensor cells are divided into multiple groups and each group is associated with a group-identifiable signal;
- each sensor cell comprises an antenna plate, a transmitter, and a receiver;
- the transmitter is configured to transmit the respective group-identifiable signal through the antenna plate;
- the receiver is configured to receive group-identifiable signals from other sensor cells through the antenna plate;
- the receiver is further configured to assign different weights to the group-identifiable signals that it receives based on a distance between this sensor cell and the transmitting sensor cells;
- and
- the group-identifiable signals are orthogonal.
Dependencies are inferred from the claim text.