Egis Technology Inc.

The disclosure provides an optical system, an optical sensing unit and an optical sensing module. The optical system is used for forming a plurality of light spots on a plurality of photosensitive regions separated from each other. The optical system includes: a lens for receiving a first light beam and converging the first light beam; a first light-transmitting layer located under the lens, for refracting the converged first light beam into a plurality of second light beams, the plurality of second light beams being used for forming the plurality of light spots on the photosensitive regions, wherein each light spot in the plurality of light spots covers a part of the plurality of photosensitive regions; and a second light-transmitting layer located under the first light-transmitting layer, wherein the plurality of second light beams are respectively incident on the plurality of photosensitive regions through the second light-transmitting layer.

Embodiments of the present disclosure provide an optical ranging device capable of reducing or eliminating pile up effect in DToF ranging method. The optical ranging device comprises a light source; a sensor module comprising a SPAD array, wherein the SPAD array comprises a first SPAD group without aperture and a second SPAD group with a first aperture, and the sensor module separately outputs a photon detection value corresponding to a number of photons received by each SPAD group; and a processing module for calculating a distance between the object to be measured and the ranging device using the photon detection value based on DToF. In response to light intensity received by the SPAD array in a first pulse window being greater than a first threshold, the distance is calculated using the photon detection value of the second SPAD group in the first pulse window.

A heterogeneously substrate-bonded optical assembly includes a processor chip, an optical chip and a molding compound layer. The processor chip includes: a processor circuit; reader circuits electrically connected to the processor circuit; a first protection layer disposed on the processor circuit and the reader circuits; and first vias penetrating through first protection layer and being electrically connected to the reader circuit. The optical chip includes: a second protection layer bonded to the first protection layer; second vias penetrating through the second protection layer and being bonded to the first vias; and optical pixels electrically connected to the reader circuit respectively through the second vias and the first vias. The molding compound layer surrounds the optical chip and is disposed on the first protection layer. A method of manufacturing the optical assembly applicable to high-resolution applications is also disclosed.

A light sensing module including a photodiode array substrate, a distance increasing layer, and a light converging element array is provided. The photodiode array substrate includes a plurality of light sensing units arranged in an array and a circuit region. The circuit region is disposed on the periphery of the light sensing units. Each of the light sensing units includes a plurality of adjacent photodiodes arranged in an array. The distance increasing layer is disposed on the photodiode array substrate. The light converging element array is disposed on the distance increasing layer, and includes a plurality of light converging units arranged in an array. Reflected light from an outside is converged by the light converging elements on the light sensing units, respectively.

An optical sensing circuit and an optical sensing method are provided. The optical sensing circuit includes a first photosensitive unit, a second photosensitive unit, an arithmetic unit, and a control unit. The first photosensitive unit and the second photosensitive unit provide a sensing current during a light sensing period. The arithmetic unit generates a combined current according to the sensing current during the light sensing period. The control unit generates a first sensed value and a second sensed value according to the combined current.

The disclosure provides an optical system, an optical sensing unit and an optical sensing module. The optical system is used for forming a plurality of light spots on a plurality of photosensitive regions separated from each other. The optical system includes: a lens for receiving a first light beam and converging the first light beam; a first light-transmitting layer located under the lens, for refracting the converged first light beam into a plurality of second light beams, the plurality of second light beams being used for forming the plurality of light spots on the photosensitive regions, wherein each light spot in the plurality of light spots covers a part of the plurality of photosensitive regions; and a second light-transmitting layer located under the first light-transmitting layer, wherein the plurality of second light beams are respectively incident on the plurality of photosensitive regions through the second light-transmitting layer.

A light-receiving cell and an optical biometrics sensor using the same are provided. The light-receiving cell for converting optical energy into electrical energy includes: one or multiple main light-receiving regions; and a connection region directly connected to the one or multiple main light-receiving regions to form an area-reduced light-receiving region, wherein the light-receiving region has one or multiple area reduced parts to decrease junction capacitance and increase a sensing voltage signal.

A light sensing device including a first conductivity type buried layer, a second conductivity type well, and a first conductivity type well is provided. The second conductivity type well is on the first conductivity type buried layer. The first conductivity type well is on the second conductivity type well and surrounded by the second conductivity type well.

An optical sensing apparatus is provided. A bias-voltage generating circuit provides a first bias voltage and a second bias voltage to a photo-sensing diode when the optical sensing apparatus is respectively in a first mode and a second mode, such that the photo-sensing diode provides a time-of-flight ranging signal in the first mode and an ambient-light sensing signal in the second mode. A quenching circuit provides the time-of-flight ranging signal to a ranging signal processing circuit in the first mode, quenches the photo-sensing diode, and provides the ambient-light sensing signal to a light-sensing signal processing circuit in the second mode.

A light sensing module including a photodiode array substrate, a distance increasing layer, and a light converging element array is provided. The photodiode array substrate includes a plurality of light sensing units arranged in an array and a circuit region. The circuit region is disposed on the periphery of the light sensing units. Each of the light sensing units includes a plurality of adjacent photodiodes arranged in an array. The distance increasing layer is disposed on the photodiode array substrate. The light converging element array is disposed on the distance increasing layer, and includes a plurality of light converging units arranged in an array. Reflected light from an outside is converged by the light converging elements on the light sensing units, respectively.