Biometric image sensing
First Claim
Patent Images
1. A biometric sensor, comprising:
- a plurality of drive lines;
a plurality of pickup lines oriented transversely to the drive lines and separated from the drive lines by a substrate;
an integrated circuit comprising drive electronics and detection electronics, wherein the substrate is disposed between the pickup lines and the integrated circuit, wherein the drive electronics comprise switches configured to multiplex the drive lines to a signal source, and wherein the detection electronics comprise one or more differential amplifiers and switches configured to multiplex the pickup lines to the one or more differential amplifiers; and
vias extending through the substrate for providing an electrical connection between the pickup lines and the integrated circuit.
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Abstract
An novel sensor is provided having a plurality of substantially parallel drive lines configured to transmit a signal into a surface of a proximally located object, and also a plurality of substantially parallel pickup lines oriented proximate the drive lines and electrically separated from the pickup lines to form intrinsic electrode pairs that are impedance sensitive at each of the drive and pickup proximal locations.
713 Citations
33 Claims
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1. A biometric sensor, comprising:
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a plurality of drive lines; a plurality of pickup lines oriented transversely to the drive lines and separated from the drive lines by a substrate; an integrated circuit comprising drive electronics and detection electronics, wherein the substrate is disposed between the pickup lines and the integrated circuit, wherein the drive electronics comprise switches configured to multiplex the drive lines to a signal source, and wherein the detection electronics comprise one or more differential amplifiers and switches configured to multiplex the pickup lines to the one or more differential amplifiers; and vias extending through the substrate for providing an electrical connection between the pickup lines and the integrated circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A biometric sensor assembly, comprising:
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a sensing grid comprising a plurality of parallel drive lines; and a plurality of parallel pickup lines oriented transversely to the drive lines and separated from the drive lines by a substrate, so as to form a capacitive sensing element at each location at which a pickup line overlaps a drive line; an integrated circuit for controlling the sensing grid, wherein the substrate is disposed between the pickup lines and the integrated circuit; a plurality of conductive traces, each conductive trace including a first end connected to an end of an associated one of the pick-up lines and a second end; and a plurality of vias, each of the vias being connected to the second end of an associated one of the conductive traces and extending through the substrate for providing an electrical connection between the associated pickup line and the integrated circuit. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification