An apparatus for direct optical capture of security-relevant objects such as at least skin prints and documents produces a contrast between skin ridges and skin valleys in direct optical sensors for capturing skin prints in the range of contrast of conventional systems with frustrated total internal reflection. A contrast enhancing layer is provided with one contrast shield associated with each light-sensitive element of the sensor layer. The associated contrast shield is arranged at a distance above the light-sensitive element and has a surface area at least as large as an active region of the light-sensitive element). The contrast shield is arranged at a distance above the light-sensitive element such that at least 60% of the active region is covered. The illumination layer has a plurality of point light sources which emit in direction of the placement surface in an angular area limited for preventing total internal reflection.

Biometric markers are seen as a secure and convenient way to control an individual's access to systems. The data that comprise these access controls, however, can be spoofed by nefarious third parties. Therefore, systems and methods are provided that track metadata related to the usage of biometric markers as access control devices to improve the security of systems using biometric markers for access control and to improve the speed and efficiency for systems when re-granting access for an individual in the event that access was revoked or suspended. A bureau collects metadata related to the authentication of individuals via biometric markers and the activities of the individual and the systems accessed. These metadata are used by the bureau to alert affected parties of potential misuse of biometric data and to reduce the processing requirements, storage requirements, and number of communications to on-board or re-authenticate an individual.

A ridge flow based fingerprint image quality determination can be achieved independent of image resolution, can be processed in real-time and includes segmentation, such as fingertip segmentation, therefore providing image quality assessment for individual fingertips within a four finger flat, dual thumb, or whole hand image. A fingerprint quality module receives from one or more scan devices ridge-flow—containing imagery which can then be assessed for one or more of quality, handedness, historical information analysis and the assignment of bounding boxes.

An arrangement of individually addressable nanostructures (200) in an array format on a substrate (100) (non-conducting, flexible or rigid) with electrical portions (conducing) in the substrate where the electrical portions form electrical contacts with the nanostructures is utilized to form individually addressable nanostructures. The said nanostructures can be 1-1 000 000 nm in base size and range from 1-1000 000 nm in height. The distance between the said nanostructures in the array can also range from 10-1 000 000 nm. The said nanostructures are covered in a dielectric material (300) (air, polymer, ceramic) that is at least 5-5 00 000 nm thicker than the height of the said nanostructures. The dielectric properties of the dielectric material are an important component in determining the capacitance/supercapacitance properties of the fingerprint device. A top electrode (400) is placed on the face of dielectric film opposite to the face in contact with the substrate where nanostructures are arranged. A top layer (500) (glass or Other robust material) is placed on top of the top metal electrode. A voltage V (900) is applied between the nanostructures (200) and the top electrodes (400), an intense electric field (600) is generated between the nanostructures (200) and the top electrode (400). The direction of the said electrical field is dependent on the polarity of the voltage applied. The electric capacitance (700) between the nanostructures and the top electrode as formed. When a finger (1000) is placed on the device, the ridges (1001) of the fingerprints make contact with the top layer (500) of the device causing a signal, (a change in the capacitance of the device) that can be detected using external circuits. The valleys (1002) of the finger do not make contact with the top layer (500) device and hence do not produce a signal. If a pressure is applied on the top layer (500), the distance between the top electrode (400) and the nanostructures (200) is reduced, causing a change in the capacitance, allowing measurement of pressure. Since the nanostructures (200) are distributed on a surface (2000) in sections (2010) we can obtain special resolution of pressure on a surface or gather fingerprints using a cost effective, low power, robust and stand-alone portable, miniature system.

A charge transfer circuit for capacitive sensing according to an embodiment of the present disclosure includes a variable capacitor defined through a sensor plate connected to one end of a drive line and one end of an X-drive line, an X-drive part disposed between a voltage input terminal and another end of the X-drive line opposing the variable capacitor, a switched capacitor integrator disposed between a voltage output terminal and another end of the drive line of which the one end is connected to the variable capacitor, and a shielding plate connected to a first input terminal of the switched capacitor integrator, wherein the first input terminal is connected to the other end of the drive line.

The invention relates to the field of biometric identification. The technical result consists in decreasing the overall dimensions and increasing the reliability of a system for registering papillary ridge patterns, while providing for reduced cost, high image quality, rapid operating speed and reduced energy consumption. The present system comprises a light source, an element which defines the position of a reading surface, an optical system, and a multi-element image receiver, wherein the reading surface is optically linked to the image receiver by rays passing through a guiding optical element, comprising a refractive surface and a reflective surface, by means of consecutive refraction on the refractive surface, reflection on the reflective surface and total internal reflection on the refractive surface

An electronic device including an array of ultrasonic transducers for generating and receiving ultrasonic signals, and an acoustic coupling layer overlying the array of ultrasonic transducers, where the ultrasonic signals are propagated through the acoustic coupling layer.

An electronic device includes a plurality of CMOS control elements arranged in a two-dimensional array, where each CMOS control element of the plurality of CMOS control elements includes two semiconductor devices. The plurality of CMOS control elements include a first subset of CMOS control elements, each CMOS control element of the first subset of CMOS control elements including a semiconductor device of a first class and a semiconductor device of a second class, and a second subset of CMOS control elements, each CMOS control element of the second subset of CMOS control elements including a semiconductor device of the first class and a semiconductor device of a third class. The plurality of CMOS control elements are arranged in the two-dimensional array such that CMOS semiconductor devices of the first class are only adjacent to other CMOS semiconductor devices of the first class, CMOS semiconductor devices of the second class are only adjacent to other CMOS semiconductor devices of the second class, and CMOS semiconductor devices of the third class are only adjacent to other CMOS semiconductor devices of the third class.

An optical sensing module is configured to sense a fingerprint of a finger. The optical sensing module includes an image sensor, a light transmissive layer, and an image selecting layer. The light transmissive layer is disposed on the image sensor, and the image selecting layer is disposed on the light transmissive layer. When the finger touches a side of the optical sensing module adjacent to the image selecting layer, air in valleys of the fingerprint contacts the optical sensing module, so that the image selecting layer has a first transmittance for light from the valleys; ridge of the fingerprint contact the optical sensing module, so that the image selecting layer has a second transmittance for light from the ridges. The first transmittance is not equal to the second transmittance. A fingerprint sensing device is also provided.

An electronic device and method are disclosed. The electronic device includes a cover glass, a display panel, a fingerprint sensor, and a processor. The processor implements the method, including: obtaining, through a fingerprint sensor, a fingerprint image from an external object contacting a surface of the electronic device, detecting, using a processor, a feature point of the fingerprint image, comparing the detected feature point of the fingerprint image with a feature point of a pre-stored reference image, detecting a variation in a distance between the surface of the electronic device and the fingerprint sensor based on a result of the comparison, and recognizing the fingerprint based on the detected variation in the distance.