Multi-sided card having a resistive fingerprint imaging array
First Claim
1. A multi-sided card having a resistive fingerprint array, comprising:
- a first side having a first fingerprint scanning device;
a second side having a second fingerprint scanning device, the first fingerprint scanning device and the second fingerprint scanning device each comprising;
a set of imaging pixel electrodes for creating a fingerprint scanning surface;
a voltage source coupled to the set of imaging pixel electrodes for supplying an initial voltage;
a meter coupled to the set of imaging pixel electrodes for taking an electrical measurement across a first group of imaging pixel electrodes and a second group of imaging pixel electrodes of the set of imaging pixel electrodes; and
a scanning area;
wherein each of the first scanning device and the second scanning device is configured to;
detect a location of the scanning area unsearched for a finger positioned thereon;
detect the finger positioned on the scanning area, the detecting comprising;
applying an initial voltage by the voltage source to the first group of imaging pixel electrodes of the set of imaging pixel electrodes, the first group of imaging pixel electrodes being in contact with a first portion of the finger,determine an electrical measurement across the first group of imaging pixel electrodes and the second croup of imaging pixel electrodes of the set of imaging pixel electrodes in response to the applying of the initial voltage, the second group of imaging pixel electrodes being in contact with a second portion of the finger,determine, based on the electrical measurement, a region on the scanning area where the finger is placed, andscan a fingerprint from the finger only at the determined region;
wherein the first croup of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix, andwherein the second group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix.
0 Assignments
0 Petitions
Accused Products
Abstract
Embodiments of the present invention provide an adaptive and intelligent fingerprint scanning device and approach for a multi-sided card. Specifically, embodiments of the present invention utilize DC resistive image scanning to reduce overall scanning time and energy consumption (e.g., by identifying a targeted scanning area). In a typical embodiment, a scanning device will be provided that includes a scanning area comprised of a set (e.g., at least one) of imaging pixel electrodes (e.g., arranged adjacent to one another in a grid-like or other fashion). As a user presses his/her finger against the scanning area, a first portion of the finger will contact a first electrode while a second portion of the finger will contact a second electrode. When this occurs, a voltage source of the device will apply an initial voltage across the first and second finger portions. A meter of the device will take an electrical measurement (e.g., resistance and/or charged skin voltage) across the two finger portions. Based on the electrical measurement, a location of the finger on the device will be identified, and the fingerprint will be scanned accordingly. Thus, the entire scanning surface need not be scanned, only the portions thereof where the finger was detected.
-
Citations
20 Claims
-
1. A multi-sided card having a resistive fingerprint array, comprising:
-
a first side having a first fingerprint scanning device; a second side having a second fingerprint scanning device, the first fingerprint scanning device and the second fingerprint scanning device each comprising; a set of imaging pixel electrodes for creating a fingerprint scanning surface; a voltage source coupled to the set of imaging pixel electrodes for supplying an initial voltage; a meter coupled to the set of imaging pixel electrodes for taking an electrical measurement across a first group of imaging pixel electrodes and a second group of imaging pixel electrodes of the set of imaging pixel electrodes; and a scanning area; wherein each of the first scanning device and the second scanning device is configured to; detect a location of the scanning area unsearched for a finger positioned thereon; detect the finger positioned on the scanning area, the detecting comprising; applying an initial voltage by the voltage source to the first group of imaging pixel electrodes of the set of imaging pixel electrodes, the first group of imaging pixel electrodes being in contact with a first portion of the finger, determine an electrical measurement across the first group of imaging pixel electrodes and the second croup of imaging pixel electrodes of the set of imaging pixel electrodes in response to the applying of the initial voltage, the second group of imaging pixel electrodes being in contact with a second portion of the finger, determine, based on the electrical measurement, a region on the scanning area where the finger is placed, and scan a fingerprint from the finger only at the determined region; wherein the first croup of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix, and wherein the second group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A method of scanning fingerprints on a multi-sided card, comprising:
-
applying an initial voltage to a first group of imaging pixel electrodes of a scanning device of the multi-sided card, the first group of imaging pixel electrodes being in contact with a first portion of a finger; determining an electrical measurement across the first group of imaging pixel electrodes and the second group of imaging pixel electrodes of the scanning device in response to the applying of the initial voltage, the second group of imaging pixel electrodes being in contact with a second portion of the finger; determine, based on the electrical measurement, a set of locations of a scanning surface on which a finger is placed; and scanning only the set of locations for a fingerprint from the finger; wherein the first group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix, and wherein the second group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix. - View Dependent Claims (8, 9, 10, 11, 12, 13)
-
-
14. A method of scanning fingerprints on a multi-sided card, comprising:
-
searching an unsearched area of a scanning device of a multi-sided card for a finger; detecting the finger based on the searching, the detecting comprising; applying an initial voltage to a first croup of imaging pixel electrodes of a scanning device positioned on the multi-sided card, the first group of imaging pixel electrodes being in contact with a first portion of the finger; determining an electrical measurement across the first group of imaging pixel electrodes and the second croup of imaging pixel electrodes of the scanning device in response to the applying of the initial voltage, the second group of imaging pixel electrodes being in contact with a second portion of the finger positioned on the multi-sided card, and the second croup of imaging pixel electrodes being non-adjacent to the first group of imaging pixel electrodes; determining a location of the finger on the scanning device positioned on the multi-sided card based on the electrical measurement; determining a second location on the scanning device where the finger is not positioned; and scanning a fingerprint from the finger at the first location without scanning the second location; wherein the first group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix, and wherein the second group of imaging pixel electrodes is a matrix having an equal number of pixel electrodes on an x-axis and a y-axis of the matrix. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification