Abstract:
A finger biometric sensor may include a dielectric layer having a front surface capable of receiving a user's finger thereon and at least one light source capable of injecting light into the user's finger. The finger biometric sensor may also include image sensors adjacent a back surface of the dielectric layer defining overlapping target areas directed toward the user's finger, and a controller capable of collecting image data from the image sensors based upon diffuse scattering and specular reflections from the user's finger, and generating fingerprint ridge three-dimensional (3D) data.
Abstract:
An electronic device may include a contactless palm biometric sensor that includes at least one light source and at least one light sensor cooperating therewith. The electronic device may also include a controller configured to capture image data from a user's palm positioned in spaced relation adjacent the contactless palm biometric sensor and determine an orientation offset of the user's palm based upon the image data. The controller may also be configured to determine a surface distortion of the user's palm based upon the image data, and perform a biometric authentication of the user's palm based upon the image data, the orientation offset, and the surface distortion.
Abstract:
A finger sensor may include pixels, pixel sensing traces each associated with a respective pixel, and electrodes overlying the pixel sensing traces. The finger sensor may also include pixel sensing circuitry coupled to the pixel sensing traces and the electrodes. The pixel sensing circuitry may be capable of operating in a measurement mode by operating the pixels so that at least some of the pixels are active, and at least some other of the pixels are inactive and coupling pixel sensing traces associated with the inactive pixels to a voltage reference. The pixel sensing circuitry may also be capable of operating in the measurement mode by coupling electrodes associated with the active pixels to the voltage reference and coupling electrodes associated with the inactive pixels to a drive signal.
Abstract:
A finger sensing device may include an array of finger sensing pixels to receive a user's finger adjacent thereto. Each finger sensing pixel may include a finger sensing electrode. The finger sensing device may include a finger drive electrode configured to couple a drive signal through the user's finger to the array of finger sensing pixels. The finger sensing device may also include differential pixel measurement circuitry coupled to the array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of the finger sensing pixels.