Abstract: An optical biometric imaging device includes an image sensor having a plurality of photodetector pixels; a lens assembly having at least one lens configured to focus light reflected by a biometric object onto the image sensor; at least one light source arranged adjacent to the lens assembly and which emits light towards a sensing surface of the biometric imaging device. The at least one light source comprises a waveguide which vertical decouples light; a first linear polarizer arranged between the light source and the image sensor; and a ring-shaped second linear polarizer arranged over the light source to polarize light emitted by the light source in a direction away from the image sensor and having an opening which allows light reflected by a biometric object to reach the lens without being filtered by the second linear polarizer. At least one of the polarizers are rotatable.

Abstract: The present invention relates to a passive terahertz biometric imaging device configured to be arranged under an at least partially transparent display panel and configured to capture a terahertz image of an object located on an opposite side of the transparent display panel, the terahertz biometric imaging device comprising: an image sensor comprising an antenna pixel array arranged to detect terahertz radiation produced by the object, for capturing a terahertz image of the object.

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in he photodetector pixel array arranged directly under a light source unit being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the controllable light source during image acquisition, performing biometric authentication at leas

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a color controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in the photodetector pixel array arranged directly under a light source being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the color controllable light source during image acquisition, and performing biometric authentica

Abstract: An optical biometric imaging device includes an image sensor having a plurality of photodetector pixels; a lens assembly having at least one lens configured to focus light reflected by a biometric object onto the image sensor; at least one light source arranged adjacent to the lens assembly and which emits light towards a sensing surface of the biometric imaging device. The at least one light source comprises a waveguide which vertical decouples light; a first linear polarizer arranged between the light source and the image sensor; and a ring-shaped second linear polarizer arranged over the light source to polarize light emitted by the light source in a direction away from the image sensor and having an opening which allows light reflected by a biometric object to reach the lens without being filtered by the second linear polarizer. At least one of the polarizers are rotatable.

Abstract: The present invention relates to a biometric imaging arrangement configured to be arranged under an at least partly transparent display panel and to acquire an infrared image of an object located on the opposite side of the least partly transparent display panel, the biometric imaging arrangement comprising: an image sensor comprising a detector pixel array configured to detect infrared light transmitted from the object for capturing an image, an at least partly transparent substrate comprising an array of microlenses, wherein each microlens is configured to redirect light through the least partly transparent substrate and onto the detector pixel array, wherein the at least partly transparent substrate further comprises optical decoupling areas configured to orthogonally redirect infrared light received from a side of the at least partly transparent substrate towards the object when being placed for imaging.

Abstract: The present invention relates to a biometric imaging arrangement comprising: an image sensor comprising a detector pixel array configured to detect infrared radiation transmitted from an object for capturing an image, a waveguide structure arranged on the image sensor to cover the detector pixel array, the waveguide structure comprising optical decoupling areas configured to orthogonally redirect infrared light received from a side of the waveguide structure towards the object when being placed for imaging.

Abstract: The present invention relates to a terahertz biometric imaging arrangement configured to be arranged under an at least partially transparent display panel and configured to capture an image of an object located on an opposite side of the transparent display panel, the biometric imaging arrangement comprising: a transmitter element arranged to emit terahertz radiation for illuminating the object; and an image sensor comprising an antenna pixel array arranged to detect terahertz radiation transmitted from the illuminated object, for producing an image.

Abstract: The present invention relates to a method for biometric authentication of a user of an electronic device comprising an optical fingerprint sensor arranged under an at least partially transparent display panel and configured to capture an image of an object located on an opposite side of the transparent display panel, the method comprises the steps of: illuminating the object with light of at least one distinguishable color; capturing at least two images of the object with an image sensor comprising a photodetector pixel array while illuminating the object with the light of at least one distinguishable color, wherein the images are captured for different applied forces by the object on the transparent display panel; and performing biometric authentication at least partly based on at least one relationship between the at least two images, the at least one relationship being related to a difference in pixel intensity from pixels in the photodetector pixel array arranged to detect light of the distinguishable col

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a color controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in the photodetector pixel array arranged directly under a light source being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the color controllable light source during image acquisition, and performing biometric authentica

Abstract: The present invention relates to a terahertz biometric imaging package comprising: an image sensor comprising an antenna pixel array arranged to detect terahertz radiation transmitted from an object, for capturing an image, each antenna pixel comprises a power detector including an antenna structure for receiving terahertz radiation, wherein the power detector is configured to convert a detected terahertz radiation to a sensing signal at a lower frequency than the frequency of the terahertz radiation, a package top cover arranged to cover the antenna pixel array, wherein the image sensor is configured to capture a terahertz image of an object located on an opposite side of the package top cover, a package bottom part arranged on the other side of the antenna pixel array opposite from the package top cover, wherein the antenna pixel array is encapsulated between the package top cover and the package bottom part.

Abstract: The present invention relates biometric authentication using an optical biometric arrangement comprising an image sensor comprising a photodetector pixel array configured to capture an image of an object, the image sensor being arranged under a controllable light source comprising light source units, the method comprising: providing a light pattern comprising portions of different light intensity for illuminating the object; acquiring an image of the object, the image comprising image portions corresponding to the portions of different light intensity of the light pattern illuminating the object, at least one image portion being captured by pixels in he photodetector pixel array arranged directly under a light source unit being active during image acquisition, and at least one image portion being captured by pixels in the photodetector pixel array arranged under an at least partly in-active illumination area of the controllable light source during image acquisition, performing biometric authentication at leas

Abstract: The present invention relates to a terahertz biometric imaging arrangement configured to be arranged under an at least partially transparent display panel and configured to capture an image of an object located on an opposite side of the transparent display panel, the biometric imaging arrangement comprising: a transmitter element arranged to emit terahertz radiation for illuminating the object; and an image sensor comprising an antenna pixel array arranged to detect terahertz radiation transmitted from the illuminated object, for producing an image.

Abstract: The present invention relates to a passive terahertz biometric imaging device configured to be arranged under an at least partially transparent display panel and configured to capture a terahertz image of an object located on an opposite side of the transparent display panel, the terahertz biometric imaging device comprising: an image sensor comprising an antenna pixel array arranged to detect terahertz radiation produced by the object, for capturing a terahertz image of the object.

Abstract: The present invention relates to a method for biometric authentication of a user of an electronic device comprising an optical fingerprint sensor arranged under an at least partially transparent display panel and configured to capture an image of an object located on an opposite side of the transparent display panel, the method comprises the steps of: illuminating the object with light of at least one distinguishable color; capturing at least two images of the object with an image sensor comprising a photodetector pixel array while illuminating the object with the light of at least one distinguishable color, wherein the images are captured for different applied forces by the object on the transparent display panel; and performing biometric authentication at least partly based on at least one relationship between the at least two images, the at least one relationship being related to a difference in pixel intensity from pixels in the photodetector pixel array arranged to detect light of the distinguishable col

Abstract: The present invention relates to a fingerprint sensor element, comprising a sensor electrode formed in an upper conducting layer, a lower electrode formed in a lower conducting layer and at least one insulating layer between the upper conducting layer and the lower conducting layer. It further comprises a charge amplifier having a negative and a positive input terminal and an output terminal. An upper side of the fingerprint sensor electrode is arranged for facing a finger and a lower side is arranged for facing the lower electrode, and the fingerprint sensor electrode and the lower electrode are arranged in such a way that a capacitance is formed between them. The sensor electrode is arranged for being connected to the negative input terminal of the charge amplifier, and the lower electrode is arranged for being connected to the output terminal of the charge amplifier.

Abstract: The present invention relates to a fingerprint sensor element, comprising a sensor electrode (11) formed in an upper conducting layer (M3), a lower electrode (17, 32) formed in a lower conducting layer (M2, P2) and at least one insulating layer (8, 9, 10, 22) between the upper conducting layer (M3) and the lower conducting layer (M2, P2). It further comprises a charge amplifier (13) having a negative (12) and a positive (14) input terminal and an output terminal (18). An upper side (11a) of the fingerprint sensor electrode (11) is arranged for facing a finger (5) and a lower side (11b) is arranged for facing the lower electrode (17), and the fingerprint sensor electrode (11) and the lower electrode (17) are arranged in such a way that a capacitance (Cref) is formed between them.