An under-screen fingerprint module for an electronic device is provided. The electronic device includes a screen defining a preset area and arranged with a first polarizer to filter first optical noise, and a back cover; the fingerprint module being arranged between the two. At least part of a vertical projection of the preset area on the back cover and that of the fingerprint module are overlapped. The fingerprint module includes a second polarizer to filter the first optical noise as reflected light of first light being part of emitted light of the screen and irradiated along a direction perpendicular to the screen and away from the back cover. A polarization direction of the second polarize and the first polarizer are same. The second polarizer is further configured to filter second optical noise as second light being part of the emitted light and irradiated along a direction towards the back cover.

A detection apparatus is provided and includes detection electrodes; detection circuit configured to be coupled to detection electrodes to detect detection signals corresponding to changes in capacitance of detection electrodes; coupling circuit configured to cause detection electrodes to be a coupled state in which detection electrodes are coupled to detection circuit and non-coupled state in which detection electrodes are uncoupled from detection circuit; drive electrode arranged at a position adjacent to detection electrodes; conductor arranged between detection electrodes and drive electrode; and drive signal generation circuit configured to be coupled to drive electrode to supply drive signal to drive electrode; wherein detection electrodes are provided to one face of insulating substrate, and wherein height of drive electrode from the one face is greater than height of the detection electrodes from the one face.

The invention relates to a fingerprint recognition system. The fingerprint recognition system includes a light emitter, an optical receiver, and a comparison module. First, the light emitter emits at least one patterned emitted light to an object to be measured, and the patterned reflected light reflected by the object is received by the light receiver. Then, the patterned emitted light and the patterned reflected light are compared with each other and the comparison information is generated by the comparison module. Finally, when the comparison information is in the three-dimensional comparison interval, the surface of the object to be measured is determined to be three-dimensional; otherwise, the surface of the object to be measured is determined to be flat. Therefore, the fingerprint recognition system of the present invention can achieve the purposes of real-time differentiation and wide applicability.

In some examples, a method includes determining, by a computing device, a plurality of regions of interest of an image for independently processing relative to a plane of interest; determining, by the computing device and for respective regions of interest of the plurality of regions of interest, a distance from objects within the respective regions of interest to the plane of interest; and processing, by the computing device and independently for the respective regions of interest, the respective regions of interest of the image based on the determined distance from the objects to the plane of interest.

An electronic device includes a housing including a first plate facing a first direction, a second plate facing a second direction opposite to the first direction, and a side member disposed in at least part of a peripheral region between the first plate and the second plate, a touch screen display having at least a portion exposed through the first plate of the housing, a fingerprint sensor disposed in a lower portion of the touch screen display, and a cover case that is coupled or integrated with at least part of the housing and that opens or closes the first plate of the housing. An air gap is formed between a first region of the touch screen display that corresponds to the fingerprint sensor and a second region of the cover case that faces at least the first region, with the cover case closing the first plate of the housing.

A contactless biometric authentication device including an insertion chamber with an opening in one side and a space into which an authenticator's finger is inserted; a shooting device positioned to capture the ventral side of the finger inserted into the insertion chamber; a first light source installed in the insertion chamber at a position on the far side of the shooting device and emits light toward the shooting device, the light being blocked by the inserted finger; a second light source provided at a position higher than a height at which the finger is inserted and emits light within a predetermined range including the shooting device when the light from the first light source is blocked by the finger, the light being absorbed by a blood vessel of the finger; and a reflection surface provided in the insertion chamber and receives and reflects the light from the second light source.

Disclosed is a cost-effective method to fabricate a multifunctional collimator structure for contact image sensors to filter ambient infrared light to reduce noises. In one embodiment, an optical collimator, includes: a dielectric layer; a substrate; a plurality of via holes; and a conductive layer, wherein the dielectric layer is formed over the substrate, wherein the plurality of via holes are configured as an array along a lateral direction of a first surface of the dielectric layer, wherein each of the plurality of via holes extends through the dielectric layer and the substrate from the first surface of the dielectric layer to a second surface of the substrate in a vertical direction, and wherein the conductive layer is formed over at least one of the following: the first surface of the first dielectric layer and a portion of sidewalls of each of the plurality of via holes, and wherein the conductive layer is configured so as to allow the optical collimator to filter light in a range of wavelengths.

Systems and methods for detecting a user's finger are provided. In some embodiments, a method may include applying a first electrical signal, applying a second signal, receiving a third electrical signal using a first electrode, receiving a fourth electrical signal using the first electrode, extracting the third and fourth electrical signals using a quadrature demodulator, and compensating for a phase delay between at least the first electrical signal and the third electrical signal.

The disclosure provides a fingerprint sensor and a fingerprint sensing method thereof. The fingerprint sensor includes an optical sensing array, an analog front end circuit and an image processing circuit. The optical sensing array is configured for sequentially outputting a plurality of analog fingerprint images corresponding to a finger. The analog front end circuit is coupled to the optical sensing array. The analog front end circuit is configured for sequentially receiving and converting the plurality of analog fingerprint images into a plurality of first digital fingerprint images. The image processing circuit is coupled to the analog front end circuit. The image processing circuit is configured for sequentially superimposing the plurality of first digital fingerprint images to generate an enhanced fingerprint image.

Provided are a fingerprint identification device, a fingerprint identification method and an electronic device, which could improve security of fingerprint identification. The fingerprint identification device includes an optical fingerprint sensor including a plurality of pixel units; at least two filter units disposed above at least two pixel units of the plurality of pixel units, where each filter unit corresponds to one pixel unit, and the at least two filter units comprise filter units in at least two colors.