Abstract: The present invention includes: a first current source, through which a first current is made to flow; a second current source, through which a second current set at a certain ratio to the first current is made to flow; a first current path, which includes a second resistor, a first resistor, and a first bipolar transistor that are connected to the first current source in a sequential manner, and through which the first current is made to flow; a second current path, which includes a third resistor and a 0th bipolar transistor that are connected to the second current source in a sequential manner, and through which the second current is made to flow; an operational amplifier, which controls current amounts of the first current and the second current by an output from an output end, and of which a positive input end is connected to a connection point between the second resistor and the first resistor, and of which a negative input end is connected to a connection point between the third resistor and the 0th bi

Abstract: The clock generation circuit outputs a clock signal with a constant cycle by repeating the following operations: when an enable signal becomes a H level, the clock signal immediately rises, and a sense end is changed to a L level via a first capacitor, then a voltage of the sense end is gradually increased via a resistor, and when the sense end reaches a predetermined potential, an output of a second inverter becomes the L level, the clock signal becomes the L level, an inverted clock signal becomes the H level, and accordingly the sense end becomes the H level; and thereafter, a current flows via the resistor so that the voltage of the sense end decreases gradually, when the sense end reaches a predetermined potential, the output of the second inverter becomes a H level, the clock signal becomes the H level, the sense end is changed to a L level via the first capacitor, then the voltage of the sense end is gradually increased via the resistor, and when the sense end reaches a predetermined potential, the out

Abstract: Fingerprint sensors include a plurality of optical sensor elements, a collimator filter disposed above the plurality of optical sensor elements, and a display disposed above the collimator filter, wherein the display is a fingerprint imaging light source. The collimator filter has a plurality of apertures, and the plurality of optical sensor elements is configured to receive light transmitted through one aperture of the plurality of apertures.

Abstract: Systems and methods for optical imaging are disclosed. An optical sensor includes: an image sensor array comprising a plurality of pixels; and a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels in the plurality of pixels, and wherein the multiple light collimating apertures are disposed over different portions of the photosensitive area of the one of the pixels.

Abstract: Disclosed is a device for optical sensing, comprising: a display comprising a transparent substrate and a plurality of light emitters disposed above the transparent substrate; a transparent cover layer disposed above the display, wherein a top surface of the transparent cover layer provides an input surface for sensing an input object; and, an angled filter disposed below the transparent substrate of the display, wherein the angled filter is configured to allow light within a tolerance angle of an acceptance angle to pass through the angled filter, wherein the acceptance angle is centered around a non-zero angle relative to a normal of the input surface.

Abstract: Systems and methods for optical imaging are disclosed. An optical sensor includes: an image sensor array comprising a plurality of pixels; and a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels in the plurality of pixels, and wherein the multiple light collimating apertures are disposed over different portions of the photosensitive area of the one of the pixels.

Abstract: Systems and methods for optical imaging are disclosed. An optical sensor includes: an image sensor array comprising a plurality of pixels; and a collimator filter disposed above the image sensor array, the collimator filter comprising a plurality of light collimating apertures and light blocking material, wherein multiple light collimating apertures of the plurality of light collimating apertures are disposed within a photosensitive area of one of the pixels in the plurality of pixels, and wherein the multiple light collimating apertures are disposed over different portions of the photosensitive area of the one of the pixels.

Abstract: Optical sensing systems and methods for imaging objects include under-display optical sensors with one or multiple discrete light sources positioned on, in or under the display. The optical sensors may include an array of optical sensing elements, e.g., photodetectors, arranged in or under the display. The displays include OLED or LCD displays.

Abstract: Fingerprint sensors include a plurality of optical sensor elements, a collimator filter disposed above the plurality of optical sensor elements, and a display disposed above the collimator filter, wherein the display is a fingerprint imaging light source. The collimator filter has a plurality of apertures, and the plurality of optical sensor elements is configured to receive light transmitted through one aperture of the plurality of apertures.

Abstract: Systems and methods for optical imaging are disclosed. The optical fingerprint sensor includes an image sensor array; a collimator filter layer disposed above the image sensor array, the collimator filter layer having an array of apertures; and an illumination layer disposed above the collimator filter layer. The collimator filter layer filters reflected light such that only certain of the reflected light beams reach optical sensing elements in the image sensor array. Employing the collimator filter layer prevents blurring while allowing for a lower-profile image sensor.

Abstract: An optical sensor system includes a display substrate, display pixel circuitry including a plurality of light emitting display elements or pixels disposed over the display substrate, a first circular polarizer disposed over the display substrate and the display pixel circuitry, and a transparent cover sheet disposed over the first circular polarizer. A top surface of the transparent cover sheet provides a sensing surface for an object such as a finger. The optical sensor system also includes a sensor layer disposed below the display substrate, the sensor layer having a plurality of photosensors, and a second circular polarizer disposed between the sensor layer and the display substrate.