An integrated photo-sensing detection display substrate. The integrated photo-sensing detection display substrate includes a base substrate; a plurality of light emitting elements on the base substrate and configured to emit light, a portion of the light being totally reflected by a surface thereby forming totally reflected light; an addressable diffraction grating layer on a side of the base substrate away from the plurality of light emitting elements, and including a plurality of individually addressable diffraction regions, light diffraction respectively in the plurality of individually addressable diffraction regions being independently controllable; and a photosensor on a side of the addressable diffraction grating layer away from the base substrate and configured to detect light transmitted from one or more of the plurality of individually addressable diffraction regions, thereby detecting fingerprint information.

The present disclosure relates to a method for fabrication of an optical sensor for use in an image recognition device, e.g. a biometric imaging device, such as a fingerprint detector, for use in under-display applications. The presently disclosed method provides a cost-efficient fabrication process, preferably employing nanoimprint lithography, for realizing an optical sensor with improved light transmittance in a compact and cost-efficient structure. In particular the presently disclosed image recognition device can be placed under a display panel of an electronic device, such as a smartphone. One embodiment relates to a method for manufacturing a biometric imaging device, the method comprising the steps of: providing an image sensor comprising a photodetector pixel array; forming an opaque layer on the first transparent substrate layer or on the photodetector pixel array, the opaque layer having a transparent pinhole array therein; arranging a second transparent substrate layer on top of the opaque layer, and forming a microlens array in the top of the second transparent substrate layer, such that each microlens in the array corresponds to a pinhole in the pinhole array and at least one pixel in the photodetector array, wherein the opaque layer with the transparent pinhole array and the microlens array is formed by means of nanoimprint lithography, such as UV based nanoimprint lithography.

A biometric capture device having an optical block integrating an acquisition surface, an optical acquisition system arranged so that a first light ray propagating, outside the optical block, along an optical axis of the said optical acquisition system forms at the level of the acquisition surface, an angle with respect to a normal to the acquisition surface of a value greater than a critical angle depending on the refractive indices of the optical block and of the air, the optical system also being arranged so that the optical axis forms an angle with respect to a normal to the exit face less than said critical angle, an illumination system configured to provide illumination of the acquisition surface, the illumination system generating a light beam defined by an illumination axis, a second light ray propagating along the illumination axis out of the optical block.

A fingerprint detection apparatus and an electronic device are provided. The fingerprint detection apparatus is applied under a display screen, the fingerprint detection apparatus includes a plurality of fingerprint detecting units distributed in an array or arranged in a staggered manner, and the fingerprint detecting unit includes: a plurality of optical sensing pixels; at least one micro lens disposed above the plurality of optical sensing pixels; and at least one light shielding layer disposed between the at least one micro lens and the plurality of optical sensing pixels, each of the at least one light shielding layer being provided with an opening corresponding to the plurality of optical sensing pixels; where oblique light signals in multiple directions are respectively transmitted to the plurality of optical sensing pixels through an opening provided in the at least one light shielding layer after being converged by the at least one micro lens.

According to one embodiment, an electronic device comprises a plurality of microlenses arranged in a hexagonal periodic structure, and provided in the plurality of sensor regions, and a plurality of spacers between the plurality of sensor regions, wherein the plurality of sensor regions include a first sensor region adjacent to the plurality of spacers, a second sensor region adjacent to the first sensor region in the first direction, and a third sensor region adjacent to the first sensor region in the second direction, and include at least one microlens overlapped with the first sensor region and the second sensor region, and at least one microlens overlapped with the first sensor region and the third sensor region.

An illumination optical system includes a plurality of light sources arranged in an annular shape, and a prism plate that is formed in an annular shape about an optical axis of illumination light from the light sources. The prism plate includes a prism surface, upon which the illumination light falls incident and on which prism a plurality of prisms arranged in an annular shape along a circumferential direction of the prism plate, are formed, a flat section upon which the illumination light falls incident and which is formed in an annular shape along the circumferential direction of the prism plate, and an emission plane that emits the illumination light. The prism surface is formed on an outer peripheral side outward from a radius of the prism plate that is centered on the optical axis, and the flat section is formed on an inner peripheral side inward from the radius.

An electronic apparatus, includes: a display screen, a reflector and a sensor, wherein a region of the display screen located on a front surface of the electronic apparatus is a first display region, a region of the display screen located on a back surface of the electronic apparatus is a second display region, and the display screen is configured to transmit light; the reflector and the sensor are arranged inside the electronic apparatus, and light transmitted from the first display region or the second display region is reflected by the reflector and then irradiated on the sensor; and the sensor generates an electric signal for fingerprint identification based on the light received. Sharing the sensor under the display screen can therefore be realized, with a single sensor to implement fingerprint collection and identification of a multi-surface display device.

A fingerprint recognition device including a light emitting layer, an image sensing layer and a micro-lens layer is provided. The image sensing layer has a plurality of pixels. The micro-lens layer is disposed between the light emitting layer and the image sensing layer and has a plurality of micro lenses respectively corresponding to the pixels. A distance between the micro-lens layer and the light emitting layer is less than or equal to 800 um and greater than or equal to h1, where h1=x/(2×tan θ), x is the minimum distance between two micro lenses respectively corresponding to different pixels on a plane where the micro-lens layer is disposed, and θ is an FWHM light receiving angle of each of the micro lenses.

A fingerprint sensing device includes a first substrate, a sensing element layer, a second substrate, a micro-structure layer, and a spacer layer. The sensing element layer is located on the first substrate and includes multiple sensing elements. The second substrate is located on the sensing element layer. The micro-structure layer is located between the second substrate and the sensing element layer, and includes multiple micro-lens structures and multiple dummy structures. Orthogonal projections of the micro-lens structures on the first substrate overlap orthogonal projections of the sensing elements on the first substrate. The spacer layer is located between the second substrate and the sensing element layer, and includes multiple main spacers. Each of the main spacers covers at least one of the dummy structures.

Provided is an electronic device. The electronic device includes a screen provided with a first polarizer, a second polarizer arranged below the screen, and an optical fingerprint identification module arranged below the second polarizer. The polarization direction of the first polarizer is the same with the polarization direction of the second polarizer. The first polarizer and the second polarizer are configured to filter a first optical noise. The second polarizer is configured to filter a second optical noise. The first optical noise is light from screen light of the screen and directing to the optical fingerprint recognition module. The second optical noise is light from the screen light, directing away from the optical fingerprint recognition module and reflected by a glass cover on an outer side of the screen.