Multifunction fingerprint sensor having optical sensing against fingerprint spoofing
First Claim
1. A fingerprint sensor device, comprising:
- a touch panel with an integrated touch sensor module, the integrated touch sensor module including;
sensing circuitry to generate a sensor signal responsive to detecting a contact input associated with a fingerprint, the sensing circuitry including;
a capacitive fingerprint sensor to detect the contact input and generate a signal indicative of an image of the fingerprint as part of the sensor signal, andan optical biometric sensor to generate a signal indicative of a biometric marker different from the fingerprint as part of the sensor signal; and
processing circuitry communicatively coupled to the sensing circuitry to process the generated sensor signal to determine whether the contact input associated with the fingerprint belongs to a finger of a live person,wherein;
the optical biometric sensor includes a light source configured to emit probe light toward a location of the contact input and to generate signal light carrying information associated with the contact input including ridges and valleys of a finger when the finger is the contact input;
the capacitive fingerprint sensor includes an array of capacitive sensing pixels for sensing different parts of the contact input to generate pixel signals that are collectively indicative of an image of the fingerprint;
the optical biometric sensor includes an array of optical sensors that are distributed in the array of capacitive sensing pixels of the capacitive fingerprint sensor, one optical sensor per capacitive sensing pixel, each optical sensor operable to capture scattered light from a respective part of the contact input to produce an optical sensor output, wherein optical sensor outputs from the optical sensors collectively form a second image of the fingerprint and are further indicative of the biometric marker different from the fingerprint; and
the optical biometric sensor includes optical collimators distributed over the array of optical sensors, wherein each optical collimator is located to collect scattered light from a respective part of the contact input to a corresponding optical sensor.
2 Assignments
0 Petitions
Accused Products
Abstract
The disclosed technology provides optical anti-proofing techniques in fingerprints sensing in devices or systems that use fingerprint identification for controlling access. The disclosed technology uses a fingerprint sensor to detect a contact input associated with a source of a fingerprint; generates an image signal from the fingerprint sensor responsive to the detected contact input that is indicative of one or more images of the fingerprint; uses an optical biometric sensor that is separate from the fingerprint sensor to generate a biometric marker detection signal indicative of a biometric marker different from the fingerprint; and processes, by processing circuitry, the generated image signal and the biometric marker detection signal to determine whether the detected contact and the associated one or more fingerprint images are from a finger of a live person who makes the contact input.
80 Citations
22 Claims
-
1. A fingerprint sensor device, comprising:
-
a touch panel with an integrated touch sensor module, the integrated touch sensor module including; sensing circuitry to generate a sensor signal responsive to detecting a contact input associated with a fingerprint, the sensing circuitry including; a capacitive fingerprint sensor to detect the contact input and generate a signal indicative of an image of the fingerprint as part of the sensor signal, and an optical biometric sensor to generate a signal indicative of a biometric marker different from the fingerprint as part of the sensor signal; and processing circuitry communicatively coupled to the sensing circuitry to process the generated sensor signal to determine whether the contact input associated with the fingerprint belongs to a finger of a live person, wherein; the optical biometric sensor includes a light source configured to emit probe light toward a location of the contact input and to generate signal light carrying information associated with the contact input including ridges and valleys of a finger when the finger is the contact input; the capacitive fingerprint sensor includes an array of capacitive sensing pixels for sensing different parts of the contact input to generate pixel signals that are collectively indicative of an image of the fingerprint; the optical biometric sensor includes an array of optical sensors that are distributed in the array of capacitive sensing pixels of the capacitive fingerprint sensor, one optical sensor per capacitive sensing pixel, each optical sensor operable to capture scattered light from a respective part of the contact input to produce an optical sensor output, wherein optical sensor outputs from the optical sensors collectively form a second image of the fingerprint and are further indicative of the biometric marker different from the fingerprint; and the optical biometric sensor includes optical collimators distributed over the array of optical sensors, wherein each optical collimator is located to collect scattered light from a respective part of the contact input to a corresponding optical sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A fingerprint sensor device, comprising:
-
a touch panel with an integrated touch sensor module, the integrated touch sensor module including; sensing circuitry to generate a sensor signal responsive to detecting a contact input associated with a fingerprint, the sensing circuitry including; a capacitive fingerprint sensor to detect the contact input and generate a signal indicative of an image of the fingerprint as part of the sensor signal, and an optical biometric sensor to generate a signal indicative of a biometric marker different from the fingerprint as part of the sensor signal; and processing circuitry communicatively coupled to the sensing circuitry to process the generated sensor signal to determine whether the contact input associated with the fingerprint belongs to a finger of a live person, wherein the optical biometric sensor includes optical collimators distributed over an array of optical sensors, wherein each optical collimator is located to collect scattered light from a respective part of the contact input to a corresponding optical sensor, wherein the optical biometric sensor includes a light source configured to emit probe light toward a location of the contact input and to generate signal light carrying information associated with the contact input including ridges and valleys of a finger when the finger is the contact input, wherein the capacitive fingerprint sensor includes an array of capacitive sensing pixels for sensing different parts of the contact input to generate pixel signals that are collectively indicative of an image of the fingerprint, and wherein the array of optical sensors is distributed in the array of capacitive sensing pixels of the capacitive fingerprint sensor, one optical sensor per capacitive sensing pixel, each optical sensor operable to capture scattered light from a respective part of the contact input to produce an optical sensor output, wherein optical sensor outputs from the optical sensors collectively form a second image of the fingerprint. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
Specification