WO2022088492A1

WO2022088492A1 - Collector, distance measurement system, and electronic device

Info

Publication number: WO2022088492A1
Application number: PCT/CN2020/141721
Authority: WO
Inventors: 苏健; 何燃; 李国花; 朱亮; 闫敏
Original assignee: 深圳奥锐达科技有限公司
Priority date: 2020-10-28
Filing date: 2020-12-30
Publication date: 2022-05-05
Also published as: CN112596068A

Abstract

A collector (12), a distance measurement system (10), and an electronic device. The collector (12) comprises a pixel unit (200) consisting of at least one macro-pixel (201). Each macro-pixel (201) comprises a plurality of pixels (202) having different aperture factors for collecting light spots reflected back by targets at different distances in the field of view. A pixel having a large aperture factor is configured to collect a long-distance light spot, and a pixel having a small aperture factor is configured to collect a short-distance light spot. By arranging the pixels (202) having different aperture factors, the situation that the signal light received by the pixels of the short-distance light spots is strong, and the pixels are prone to saturation or accumulation is avoided, the strength of the reflected signals, which are received by the collector (12), of tested objects at different distances is balanced, the change range of the signal light strength is narrowed, and the distance measurement accuracy is improved.

Description

A collector, distance measurement system and electronic equipment

This application claims the priority of the Chinese patent application filed on October 28, 2020 with the application number 202011174215.7 and the title of the invention is "A collector, distance measuring system and electronic device", the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of optical ranging, and in particular, to a collector, a distance measurement system and an electronic device.

Background technique

Using the principle of time of flight (ToF), the distance of the target can be measured to obtain a depth image containing the depth value of the target, and further functions such as 3D reconstruction, face recognition, and human-computer interaction can be realized based on the depth image. Related distance measurement systems have been widely used in consumer electronics, unmanned aerial vehicles, AR/VR and other fields. Distance measurement systems based on the time-of-flight principle often include a beam transmitter and a collector. The light source in the transmitter emits a beam to the target space to provide illumination, and the collector receives the beam reflected back by the target. Among them, the collector includes a pixel array, which is generally a pixel array based on a single photon avalanche diode (SPAD). When a photon in the reflected light beam is incident on the SPAD, the avalanche event output signal can be triggered to record the time when the photon reaches the pixel. , based on which the time required for the beam to go from emission to reception is calculated.

According to the optical path configuration between the transmitter and the collector, the ToF measurement system can be divided into two forms: coaxial and off-axis; among them, the coaxial system often allows the transmitter and the collector to share a scanning device, such as a MEMS galvanometer, so as to Realize the scanning of large field of view; off-axis systems often do not need scanning devices, but set up more receiving components (such as pixel arrays) at the collector end, so as to measure the distance of multiple points in the large field of view at one time.

For the off-axis ToF measurement system, in order to receive the reflection signals of the measured objects at different distances, the pixels are generally arranged in a two-dimensional array, and the superpixels are turned on within the moving range of the light spot to receive the signal light. However, since the reflected signal intensity of the measured object at different distances is roughly inversely proportional to the square of the distance, this will result in very strong signal light received on the pixels of the close-range light spot, making these pixels prone to saturation or serious stacking effects. , resulting in inaccurate ranging.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a collector, a distance measurement system and an electronic device to solve at least one of the above-mentioned background technical problems.

An embodiment of the present application provides a collector, which includes a pixel unit composed of at least one macro pixel, and each of the macro pixels includes a plurality of pixels with different aperture factors, so as to collect reflections from objects at different distances in the field of view. The aperture factor is any value between 0 and 1; wherein, the pixels with a large aperture factor are configured to collect long-range light spots, and the pixels with a small aperture factor are configured to collect short-range light spots.

In some embodiments, the pixel is configured with a blocking sheet, so as to limit the light entering area of the pixel through the blocking sheet, and reduce the photosensitive area of the pixel.

In some embodiments, the shielding sheet is a metallic or non-metallic light shielding medium or coating disposed on the pixel.

In some embodiments, each pixel corresponds to one of the blocking sheets, and a plurality of the blocking sheets are configured to have different aperture factors.

In some embodiments, the shielding sheet is provided with an opening, and the signal light reflected by the measured target object is incident on the corresponding pixel through the opening.

In some embodiments, the shape of the opening of the shielding sheet may be a square, a rectangle, a circle, a polygon or other irregular shapes.

In some embodiments, the number of openings of the shielding sheet may be one or more.

In some embodiments, the pixels are set to have an adjustable size of the photosensitive area. By adjusting the size of the photosensitive area of each pixel, the size of the photosensitive area of each pixel is different, so that the pixels have different sizes. opening factor.

The embodiments of the present application further provide a distance measurement system, including a collector, a transmitter, and a processing circuit respectively connected to the transmitter and the collector; wherein,

The transmitter is used for emitting a pulsed beam to the target area, and at least part of the pulsed beam is reflected by the target area to form a reflected pulsed beam;

a collector for receiving photons in the reflected pulse beam to form a photon signal; the collector includes a pixel unit composed of at least one macro pixel, each of the macro pixels includes a plurality of pixels with different aperture factors, so as to be used for Collect the light spots reflected back by targets at different distances in the field of view; the aperture factor is any value between 0 and 1; wherein, the pixel with a large aperture factor is configured to collect long-distance light spots, and the pixel with a small aperture factor is configured In order to collect close-up spots;

The processing circuit synchronizes the trigger signals of the transmitter and the collector, processes the photon signal, and calculates the distance information of the target to be measured based on the flight time of the reflected pulse beam.

The embodiment of the present application further provides an electronic device, including: a casing, a screen, and a distance measurement system; wherein, the transmitter and the collector of the distance measurement system are arranged on the same side of the electronic device, so as to be used to transmit to the electronic device. The target object emits a light beam and receives the light beam reflected by the target object and forms an electrical signal; the distance measurement system includes a transmitter, a collector, and a processing circuit respectively connected to the transmitter and the collector; wherein, the transmitter a collector for emitting a pulsed beam to a target area, and at least part of the pulsed beam is reflected by the target area to form a reflected pulsed beam; a collector for receiving photons in the reflected pulsed beam to form a photon signal; the collector includes a A pixel unit composed of at least one macro pixel, each of which includes a plurality of pixels with different aperture factors, so as to collect the light spots reflected from objects at different distances in the field of view; the aperture factor is between 0 and 1. Any value between; wherein, the pixel with a large aperture factor is configured to collect long-distance light spots, and the pixel with a small aperture factor is configured to collect short-range light spots; the processing circuit synchronizes the trigger signals of the transmitter and the collector, The photon signal is processed, and the distance information of the target to be measured is calculated based on the flight time of the reflected pulse beam.

An embodiment of the present application provides a collector, which includes a pixel unit composed of at least one macro pixel, and each of the macro pixels includes a plurality of pixels with different aperture factors, so as to collect reflections from objects at different distances in the field of view. The aperture factor is any value between 0 and 1; wherein, the pixels with a large aperture factor are configured to collect long-range light spots, and the pixels with a small aperture factor are configured to collect short-range light spots. In the present application, by setting pixels with different aperture factors, the aperture factor of the pixels irradiated by the long-distance light spot is large, and the aperture factor of the pixels irradiated by the short-distance light spot is small, which avoids the signal light received on the pixels of the short-distance light spot being strong, and the pixels are easy to In the case of saturation or accumulation effect, the reflected signal intensity of the measured objects at different distances received by the collector is balanced, the variation range of the signal light intensity is reduced, and the ranging accuracy is improved.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of a distance measurement system according to an embodiment of the present application.

FIG. 2 is a schematic diagram of a collector according to an embodiment of the present application.

FIG. 3 is a schematic diagram illustrating the arrangement of a light shield and a pixel array of a collector according to an embodiment of the present application.

FIG. 4 is a schematic diagram of another arrangement of a pixel array of a collector according to an embodiment of the present application.

FIG. 5 is a schematic diagram of another arrangement of a pixel array of a collector according to an embodiment of the present application.

FIG. 6 is a schematic diagram of an electronic device according to another embodiment of the present application.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the embodiments of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be used for either a fixing function or a circuit connecting function.

It is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that The device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "plurality" means two or more, unless otherwise expressly and specifically defined.

FIG. 1 is a schematic diagram of a distance measurement system according to an embodiment of the present application. The distance measurement system 10 includes a transmitter 11 , a collector 12 , and a processing circuit 13 connected to the transmitter 11 and the collector 12 respectively. Wherein, the transmitter 11 is used to emit a light beam 30 to the target area 20, and the light beam 30 is emitted into the space of the target area to illuminate the target object in the space; at least part of the emitted light beam 30 is reflected by the target area 20 to form a reflected beam 40, and the reflected beam At least part of the light beams in 40 are received by the collector 12; the processing circuit 13 is connected to the transmitter 11 and the collector 12 respectively, and synchronizes the trigger signals of the transmitter 11 and the collector 12 to calculate the required light beams from emission to reflection back to being received. time, that is, the flight time t between the emitted light beam 30 and the reflected light beam 40, and further, the distance D of the corresponding point on the target object can be calculated by the following formula:

D=c t/2 (1)

where c is the speed of light.

The transmitter 11 includes a light source 111, an emission optical element 112, a driver 113, and the like. The light source 111 may be a light emitting diode (LED), a laser diode (LD), an edge emitting laser (EEL), a vertical cavity surface emitting laser (VCSEL), etc., or a one-dimensional or two-dimensional light source composed of multiple light sources array. Preferably, the light source array is a VCSEL array light source chip formed by generating multiple VCSEL light sources on a single semiconductor substrate, and the arrangement of the light sources in the light source array may be regular or irregular. The light beam emitted by the light source 111 may be visible light, infrared light, ultraviolet light, or the like. The light source 111 emits light beams outward under the control of the driver 113 .

In some embodiments, the light source 111 emits a pulse beam at a certain frequency (pulse period) under the control of the driver 113, which can be used in direct time-of-flight (Direct TOF) measurement. The frequency is set according to the measurement distance, for example, it can be Set to 1MHz-100MHz, and the measurement distance is several meters to several hundred meters. It can be understood that, a part of the processing circuit 13 or a sub-circuit existing independently of the processing circuit 13 can also be used to control the light source 111 to emit light beams. In some embodiments, the light source 111 emits an amplitude-modulated continuous wave beam, such as a sinusoidal or square wave continuous wave beam, under the control of the processing circuit, which can be used in indirect time-of-flight (Indirect TOF) measurements.

The emission optical element 112 receives the light beam emitted from the light source 111 and shapes it to project it onto the target area. In some embodiments, the transmitting optical element 112 receives the pulsed light beam from the light source 111, performs optical modulation on the pulsed light beam, such as modulation of diffraction, refraction, reflection, etc., and then emits the modulated light beam into space, such as a focused beam, Flood beams, structured light beams, etc. The emission optical element 112 may be one or a combination of a lens, a liquid crystal element, a diffractive optical element, a microlens array, a metasurface optical element, a mask, a mirror, a MEMS galvanometer, and the like.

The collector 12 includes a pixel unit 121, a filter unit 122 and a receiving optical element 123; wherein, the receiving optical element 123 is used to receive at least part of the light beam reflected back by the target and guide it to the pixel unit 121, and the filter unit 122 is used to filter out the background light or stray light. The pixel unit 121 includes a two-dimensional pixel array composed of a plurality of pixels; in some embodiments, the pixel unit 121 is a pixel array composed of a single-photon avalanche photodiode (SPAD), and the SPAD can respond to an incident single photon and output A signal indicating the time of arrival of the received photon response at each SPAD enables the acquisition of weak optical signals and the calculation of time of flight using methods such as time-correlated single photon counting (TCSPC).

Generally, it also includes a readout circuit composed of one or more of a signal amplifier, a time-to-digital converter (TDC), a digital-to-analog converter (ADC) and other devices connected to the pixel unit 121 . These circuits can be integrated with the pixels, as a part of the collector, or as a part of the processing circuit 13, hereinafter collectively set as a part of the processing circuit 13.

The processing circuit 13 synchronizes the trigger signals of the transmitter 11 and the collector 12, processes the photon signal of the pixel collected beam, and calculates the distance information of the target to be measured based on the flight time of the reflected beam. In some embodiments, the SPAD outputs a photon signal in response to an incident single photon, and the processing circuit 13 receives the photon signal and performs signal processing to obtain the time-of-flight of the light beam. Specifically, the processing circuit 13 calculates the number of collected photons to form continuous time bins, and these time bins are connected together to form a statistical histogram to reproduce the time series of the reflected beams, and identify the reflected beams from emission to reflection by peak matching and filter detection. Returns the received flight time. It can be understood that the processing circuit 13 may be an independent dedicated circuit, such as a dedicated SOC chip, an FPGA chip, an ASIC chip, etc., or may include a general-purpose processing circuit.

In some embodiments, the distance measurement system 10 further includes a memory for storing a pulse encoding program, and the encoding program is used to control the excitation time, emission frequency, etc. of the light beam emitted by the light source 111 .

In some embodiments, the distance measurement system 10 may further include devices such as a color camera, an infrared camera, and an IMU, and the combination with these devices can realize more abundant functions, such as 3D texture modeling, infrared face recognition, SLAM and other functions.

Referring to FIG. 2 , FIG. 2 is a schematic structural diagram of a collector 12 according to an embodiment of the present application. The collector 12 includes a pixel unit 200; the pixel unit 200 includes at least one macro pixel 201, and each macro pixel 201 includes a plurality of pixels 202 with different aperture factors, so as to collect light spots reflected from objects at different distances in the field of view; Among them, the long-distance light spot (the light spot reflected by the long-distance target) is incident on the pixel with a large aperture factor, and the short-distance light spot (the light spot reflected by the short-distance target) is incident on the pixel with a small aperture factor. Specifically, the pixels 202 with different aperture factors may be arranged regularly or irregularly, which is not particularly limited in this embodiment of the present application. In some embodiments, as shown in FIG. 4 , the reflected light spot is incident on the combined pixel 204 (for example, four pixels form one combined pixel), and the aperture factor of each pixel in the combined pixel can be configured to be the same or different. .

In some embodiments, the collector further includes a readout circuit 300 including a TDC circuit and a histogram processing circuit for processing the photon signal and outputting a histogram including photon time-of-flight information.

Referring to FIG. 3 , in some embodiments, the pixels having different aperture factors are realized by setting the shielding sheet 203 . Specifically, the collector 12 includes a pixel array and a plurality of shielding sheets 203; wherein, the pixel array is a two-dimensional pixel array composed of a plurality of pixels for sensing the signal light reflected by the measured target object; the plurality of shielding The sheet 203 is configured to have different aperture factors, so as to limit the light-entering area of the pixel by blocking the pixel, reduce the photosensitive area of the pixel, and limit the light-entering amount. As shown in FIG. 3, the shielding sheet 203 is provided with an opening 2031, and the signal light reflected by the target object to be measured can be incident on the pixel 202 through the opening 2031; the white color in the figure represents the opening of the shielding sheet, and one shielding sheet corresponds to one pixel. In the embodiment of the present application, the opening of the shielding sheet is not adjustable; of course, in other embodiments, the opening of the shielding sheet can also be set to be adjustable, and the number of the shielding sheet is less than or equal to the number of pixels.

In some implementations, the number of blocking sheets and the number of pixels may be the same or different; for example, during long-distance measurement, most pixels do not need to be blocked, so the number of blocking sheets and the number of pixels may be different. The number is less than the number of pixels. It can be understood that, in some embodiments, one occlusion sheet may also correspond to multiple pixels.

In some embodiments, the shielding sheet is a metal or non-metallic light shielding medium or coating of various types disposed on the pixels. The shape of the opening of the shielding sheet can be square, rectangle, circle, polygon or other irregular shapes. The number of openings of the shielding sheet may be one or more, the position of the opening is not limited to the central position, and correspondingly, the unshielded part of the pixel is not limited to the central position of the pixel.

In some embodiments, the pixel is designed to have an adjustable size of the photosensitive area, and each pixel has a different aperture factor by adjusting the size of the photosensitive area of each pixel so that the size of the photosensitive area of each pixel is different. Among them, the aperture factor of the pixel can be any value between 0 and 1. When the aperture factor is 0, the area of the photosensitive area of the pixel is zero, the amount of incoming light is zero, and the pixel cannot collect light spots; when the aperture factor is 1, the pixel The area of the photosensitive area has not been reduced, which is the area of the photosensitive area of the pixel in the initial normal condition. This time, the area of the photosensitive area of the pixel is the largest, and the amount of light entering is the largest, allowing the pixel to collect more light signals. Pixels with different aperture factors can form a pixel array in any combination, as long as the pixel array can adapt to changes in signal light intensity with position.

It should be noted that, in the embodiments of the present application, shielding sheets are used or pixels are designed to achieve different aperture factors. In other embodiments, pixels can also have different aperture factors by other means. The application examples are not illustrated one by one, and no matter what method is adopted, as long as it does not deviate from the purpose of the creation of the application, it should all belong to the protection scope of the application.

Referring to Figures 4-5, the pixels with different aperture factors can be a combination of any position, as long as they can adapt to the change of the signal light intensity with the position, and the arrangement of the pixels can be regular or irregular. . Among them, Figure 4 is a regular arrangement, and the pixel aperture factor in the combined pixel is the same, the aperture factor of the pixel gradually decreases from left to right, and the pixels with different aperture factors sequentially collect long-distance, medium-distance, and short-distance light spots . While FIG. 5 is an irregular form, the aperture factor of the pixels in the combined pixel is different, and the aperture factor is any value between 0-1.

In some embodiments, when the transmitter 11 emits a spot beam to the object to be measured, the spot beam is reflected by the object to be measured, and the pixel unit in the collector 12 will guide the spot beam to the corresponding pixel, wherein the configuration of a single spot beam The imaging light spot is incident on the "combined pixel" composed of the corresponding multiple pixels. As shown in FIG. 4, a single spot corresponds to a composite pixel 204 composed of 4 pixels. The size of the combined pixel 204 can be specifically set according to the actual situation, and includes at least one pixel. For off-axis scanning, due to the existence of parallax, there will be displacement of the light spot incident on the pixel at different distances from the measured object. Generally, the light spot will shift along the baseline direction. Therefore, the light spot is subject to parallax by the pre-calibration method. All the combined pixels included in the offset caused by the influence form a macro pixel. During ranging, the pixels in the macro pixel are all turned on, so that the combined pixels corresponding to the spots reflected by objects at different distances within the measurement range fall into the macro pixel. within the pixel area. Moreover, the number of macro pixels determines the number of sampling points that the collector completes one frame of measurement.

Referring to Figure 2, the readout circuit includes a TDC circuit and a histogram processing circuit for processing the photon signal to draw a histogram reflecting the pulse waveform emitted by the light source in the transmitter; Calculate the flight time, and finally output the result. The readout circuit may be composed of a single TDC circuit and a histogram processing circuit, or may be an array readout circuit composed of multiple TDC circuits and histogram processing circuits.

Referring to FIG. 6, FIG. 6 shows an electronic device according to another embodiment of the present application. The electronic device may be a desktop, a desktop-mounted device, a portable device, a wearable device or a vehicle-mounted device, a robot, and the like. Specifically, the device may be a laptop or electronic device to allow gesture recognition or biometrics. In other examples, the device may be a head-mounted device used to identify objects or hazards in the user's surroundings for safety purposes, for example, a virtual reality system that obstructs the user's vision of the environment, may detect objects or hazards in the surrounding environment , to warn the user about nearby objects or obstacles. In other examples, it may be a mixed reality system that mixes virtual information and images with the user's surroundings, and objects or people in the user's environment may be detected to integrate virtual information with the physical environment and objects. In other examples, it may also be a device applied in fields such as unmanned driving. Referring to FIG. 10 , taking a mobile phone 400 as an example, the electronic device includes a casing 41 , a screen 42 , and the distance measurement system described in the foregoing embodiment; wherein, the transmitter and the collector of the distance measurement system It is arranged on the same side of the electronic device and is used to emit light beams to the target object and receive the light beams reflected by the target object to form electrical signals.

It can be understood that the above content is a further detailed description of the present application in conjunction with specific/preferred embodiments, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field of the present application, without departing from the concept of the present application, they can also make several substitutions or modifications to the described embodiments, and these substitutions or modifications should be regarded as It belongs to the protection scope of this application. In the description of this specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples" or the like is meant to be used in conjunction with the description. A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application.

In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without contradicting each other. Although the embodiments of the present application and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.

Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Those of ordinary skill in the art will readily appreciate that the above disclosures, processes, machines, now existing or later developed, that perform substantially the same functions or achieve substantially the same results as the corresponding embodiments described herein can be utilized. Manufacture, composition of matter, means, method or step. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.

Claims

A collector, characterized in that it includes a pixel unit composed of at least one macro pixel, and each of the macro pixels includes a plurality of pixels with different aperture factors, so as to be used to collect the reflections reflected from objects at different distances in the field of view. Light spot; the aperture factor is any value between 0 and 1; wherein, a pixel with a large aperture factor is configured to collect a long-range light spot, and a pixel with a small aperture factor is configured to collect a short-range light spot.
The collector of claim 1, wherein the pixel is provided with a shielding sheet, so as to limit the light-entering area of the pixel through the shielding sheet, and reduce the photosensitive area of the pixel.
The collector of claim 2, wherein the shielding sheet is a metal or non-metal light shielding medium or coating disposed on the pixels.
The collector of claim 2, wherein each pixel corresponds to one of the shielding pieces, and a plurality of the shielding pieces are configured to have different aperture factors.
The collector according to claim 4, wherein the shielding sheet is provided with an opening, and the signal light reflected by the target object to be measured is incident on the corresponding pixel through the opening.
The collector according to claim 5, wherein the shape of the opening of the shielding sheet can be a square, a rectangle, a circle, a polygon or other irregular shapes.
The collector according to claim 5, wherein the number of openings of the shielding sheet can be one or more.
The collector according to claim 1, wherein the pixel is set to have an adjustable size of the photosensitive area, and by adjusting the size of the photosensitive area of each pixel, the size of the photosensitive area of each pixel is different, Thus, the pixels have different aperture factors.
A distance measurement system, characterized in that it includes a transmitter, a collector, and a processing circuit respectively connected to the transmitter and the collector; wherein,

The transmitter is used for emitting a pulsed beam to the target area, and at least part of the pulsed beam is reflected by the target area to form a reflected pulsed beam;

a collector for receiving photons in the reflected pulse beam to form a photon signal; the collector includes a pixel unit composed of at least one macro pixel, each of the macro pixels includes a plurality of pixels with different aperture factors, so as to be used for Collect the light spots reflected back by targets at different distances in the field of view; the aperture factor is any value between 0 and 1; wherein, the pixel with a large aperture factor is configured to collect long-distance light spots, and the pixel with a small aperture factor is configured In order to collect close-up spots;

The processing circuit synchronizes the trigger signals of the transmitter and the collector, processes the photon signal, and calculates the distance information of the target to be measured based on the flight time of the reflected pulse beam.
An electronic device, characterized in that it includes: a casing, a screen, and a distance measurement system; wherein, the transmitter and the collector of the distance measurement system are arranged on the same side of the electronic device, so as to be used for pointing a target object to a target object. emit light beams and receive light beams reflected by the target object and form electrical signals; the distance measurement system includes a transmitter, a collector, and a processing circuit respectively connected to the transmitter and the collector; wherein, the transmitter, It is used for emitting a pulse beam to the target area, and at least part of the pulse beam is reflected by the target area to form a reflected pulse beam; a collector receives photons in the reflected pulse beam to form a photon signal; the collector includes at least one A pixel unit composed of macro pixels, each of which includes a plurality of pixels with different aperture factors for collecting the light spots reflected back by targets at different distances in the field of view; the aperture factor is between 0 and 1. Arbitrary value; wherein, the pixel with a large aperture factor is configured to collect a long-distance light spot, and the pixel with a small aperture factor is configured to collect a short-range light spot; the processing circuit synchronizes the trigger signals of the transmitter and the collector, and analyzes the The photon signal is processed, and the distance information of the target to be measured is calculated based on the flight time of the reflected pulse beam.