Laser emitting device and control method and device for light emitting of light source

Abstract

The embodiment of the invention provides a laser emitting device and a light source light emitting control method and device. The laser emitting device comprises a first light source and a driving circuit. The first light source comprises a first light-emitting area group, and the first light-emitting area group comprises at least two first light-emitting areas. The driving circuit drives the first light source. The driving circuit drives at least two first light-emitting areas in the first light-emitting area group to emit laser in a first time window. According to the scheme, the detection performance and the safety performance of the optical detection device can be improved.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of optical detection technology, and in particular to a laser emitting device, and a method and device for controlling light emission of a light source. Background Art

[0002] An optical detection device uses light as a medium to detect objects. Compared to ordinary light sources, lasers have properties such as monochromaticity and good directionality. Object detection using lasers as a medium is finding applications in a growing number of fields, such as intelligent driving (or autonomous driving), drones, geographic surveying and mapping, and environmental monitoring. With the increasing use of optical detection devices using lasers as a detection medium (e.g., lidar), improving their detection performance remains a persistent concern in this field. Summary of the Invention

[0003] The embodiments of the present disclosure provide a laser emitting device, and a method and device for controlling the light emission of a light source, so as to improve the detection performance of an optical detection device.

[0004] In a first aspect, a laser emitting device is provided, comprising: a first light source and a driving circuit; the first light source comprises a first light-emitting area group, the first light-emitting area group comprises at least two first light-emitting areas; the driving circuit is used to drive the first light source, wherein the driving circuit drives at least two first light-emitting areas in the first light-emitting area group to emit laser within a first time window.

[0005] The aforementioned laser emitting device can perform detection using a parallel scanning method. In this parallel scanning method, the light-emitting areas of the light source are scanned in groups, and the driver circuit drives at least two light-emitting areas in the same light-emitting area group to emit laser light within the same time window. This parallel scanning method can generally extend the time interval between adjacent laser pulses in the same light-emitting area, reducing the number of laser emissions per light-emitting area per unit time, thereby improving safety. This parallel scanning method also reduces the limit on the emission energy of the laser pulses, which is beneficial for improving detection performance.

[0006] In one implementation, the driving circuit is configured to drive at least two first light-emitting regions to emit laser light in the same or different timings within a first time window. The timing may represent the timing at which the light-emitting regions sequentially emit one or more laser pulses, and may also be referred to as an emission timing (or light-emitting timing).

[0007] When emitting lasers in the same sequence, the design complexity of the sequence is low and easy to implement. When emitting lasers in different sequences, the number of laser pulses emitted by the first light source at the same time can be further reduced on the basis of extending the time interval between adjacent laser pulses in the same light-emitting area, thereby reducing the laser energy emitted by the optical detection device at the same time and enhancing safety. In addition, since multiple light-emitting areas scanned in parallel within the same time window can emit lasers at different times, the energy of each laser pulse can be increased while ensuring safety, thereby enhancing the ranging capability of the laser radar. Multiple light-emitting areas scanned in parallel can emit laser pulses at different times, and the corresponding echoes can return to the detection area at different times, which can also reduce the mutual interference between different detection areas and improve the accuracy of detection.

[0008] In one implementation, the first light source includes a first light array. In the first light array, at least two first light-emitting areas of the first light-emitting area group are non-adjacent. The non-adjacent light-emitting areas scanned in parallel are separated by a certain distance, and their emitted light beams are also spatially spaced apart. This can reduce the increase in beam intensity caused by beam overlap, further improving safety.

[0009] Optionally, the first light source includes a first light-emitting array, and at least two first light-emitting areas of the first light-emitting area group are located in the same row or column of the first light-emitting array. The light-emitting areas within the light-emitting area group are arranged in the same row or column, which simplifies parallel scanning driving, reduces implementation costs, and also helps extend the service life of the driving circuit and reduce maintenance costs.

[0010] In one implementation, the first light source further includes a second light-emitting area group, the second light-emitting area group including at least two second light-emitting areas; and the driving circuit is further configured to drive the at least two second light-emitting areas in the second light-emitting area group to emit laser light within a second time window. The first light source may include multiple light-emitting area groups, and either the synchronous scanning or asynchronous scanning method described above may be applied to all or some of the light-emitting area groups of the first light source.

[0011] Optionally, the driving circuit is used to drive at least two second light-emitting areas to emit laser light in the same or different timings within the second time window.

[0012] Optionally, the time difference between the first time window and the second time window is less than or equal to a first time threshold, and the distance between at least one first light-emitting area in the first light-emitting area group and at least one second light-emitting area in the second light-emitting area group is less than or equal to the first distance threshold. By setting the time difference between the first time window of the first light-emitting area group and the second time window of the second light-emitting area group to be less than or equal to the first time threshold, the time interval between inter-group scanning can be reduced. This inter-group scanning approach can reduce or resolve motion blur and further improve detection performance.

[0013] In one implementation, the laser emitting device further includes a second light source, wherein the maximum detection range of the second light source is greater than the maximum detection range of the first light source. The laser emitting device may include multiple light sources, each having a different maximum detection range, to achieve a non-uniform detection effect across the entire field of view.

[0014] Optionally, the second light source includes a third light-emitting area group, which includes at least two third light-emitting areas; the driving circuit is further used to drive the second light source, wherein the driving circuit drives at least two third light-emitting areas in the third light-emitting area group to emit laser within a third time window.

[0015] Optionally, the driving circuit is used to drive at least two third light-emitting areas to emit laser light in the same or different time sequences within the third time window.

[0016] Optionally, the number of third light-emitting areas in the third light-emitting area group is greater than the number of first light-emitting areas in the first light-emitting area group.

[0017] Optionally, the time difference between the first time window and the third time window is less than or equal to a second time threshold, and the interval distance between at least one first light-emitting area in the first light-emitting area group and at least one third light-emitting area in the third light-emitting area group is less than or equal to a second distance threshold.

[0018] In one implementation, the driving circuit drives at least two first light-emitting areas to emit lasers alternately within the first time window; or, the driving circuit drives at least two first light-emitting areas to emit lasers randomly within the first time window.

[0019] In a second aspect, a method for controlling the emission of a light source is provided, comprising: generating a first control instruction; sending the first control instruction to any one of the laser emitting devices provided in the first aspect above, wherein the first control instruction is used to control the driving circuit of the laser emitting device to drive at least one light source of the laser emitting device.

[0020] Optionally, the control method further includes: generating a second control instruction; and sending the second control instruction to the laser receiving device. The second control instruction is used to control the detection circuit of the laser receiving device to drive at least one detection zone of the laser receiving device. When the first control instruction controls the first light-emitting zone group of the laser receiving device to emit laser light within a first time window, the second control instruction controls the at least one first detection zone of the laser receiving device to activate within the first time window, and the at least one first detection zone corresponds to the first light-emitting zone group.

[0021] In a third aspect, a device for controlling light source emission is provided, comprising: a processor and a first interface, wherein the processor is configured to generate a first control instruction and send the first control instruction to any laser emitting device provided in the first aspect via the first interface. The first control instruction is configured to control a driving circuit of the laser emitting device to drive at least one light source of the laser emitting device.

[0022] Optionally, the control device further includes: a second interface; the processor is further configured to generate a second control instruction and transmit the second control instruction to the laser receiving device via the second interface. The second control instruction is configured to control the detection circuit of the laser receiving device to drive at least one detection zone of the laser receiving device. When the first control instruction controls the first light-emitting zone group of the laser receiving device to emit laser light within a first time window, the second control instruction controls the at least one first detection zone of the laser receiving device to activate within the first time window, where the at least one first detection zone corresponds to the first light-emitting zone group.

[0023] In a fourth aspect, an optical detection device is provided, comprising: a laser emitting system, a laser receiving system, and a control and processing system. The laser emitting system includes any of the laser emitting devices provided in the first aspect, configured to emit laser light; the laser receiving system is configured to receive an echo of the laser light reflected from an object and convert the echo into an echo signal; and the control and processing system is configured to determine information about the object based on the echo signal.

[0024] Optionally, the above control and processing system is also used to: generate a first control instruction; send the first control instruction to any one of the laser emitting devices provided in the first aspect above, wherein the first control instruction is used to control the driving circuit of the laser emitting device to drive at least one light source of the laser emitting device.

[0025] Optionally, the control and processing system is further configured to: generate a second control instruction; and transmit the second control instruction to a laser receiving device of the laser receiving system. The second control instruction is configured to control a detection circuit of the laser receiving device to drive at least one detection zone of the laser receiving device. When the first control instruction controls the first light-emitting zone group of the laser receiving device to emit laser light within a first time window, the second control instruction controls the at least one first detection zone of the laser receiving device to activate within the first time window, where the at least one first detection zone corresponds to the first light-emitting zone group.

[0026] In a fifth aspect, a terminal device is provided, comprising the optical detection device provided in the fourth aspect.

[0027] In a sixth aspect, a computer-readable storage medium is provided, comprising instructions stored thereon, wherein when the instructions are called by a processor, any one of the control methods provided in the second aspect above is executed.

[0028] In a seventh aspect, a computer program (or computer program product) is provided, comprising instructions, which, when called by a processor, execute any one of the control methods provided in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following provides an illustrative introduction to the drawings required for describing the embodiments. The drawings described below are merely examples of the present disclosure. A person skilled in the art can, without inventive effort, derive other drawings from the provided drawings. The drawings are intended to provide a further understanding of the present disclosure and constitute part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not limit the present disclosure.

[0030] Figure 1 A schematic structural diagram of a laser radar provided in some embodiments of the present disclosure is shown.

[0031] Figure 2 A schematic structural diagram of a solid-state laser radar provided in some embodiments of the present disclosure is shown.

[0032] Figure 3 A schematic diagram of the arrangement structure of a light emitting array provided in some embodiments of the present disclosure is shown.

[0033] Figure 4 A schematic diagram of the arrangement structure of another light-emitting array provided in some embodiments of the present disclosure is shown.

[0034] Figure 5 A schematic diagram showing the scanning and echo signal accumulation during a detection process of a laser radar provided in some embodiments of the present disclosure is shown.

[0035] Figure 6 A schematic structural diagram of a laser emitting device provided in some embodiments of the present disclosure is shown.

[0036] Figure 7 A schematic diagram of a laser emission timing provided in some embodiments of the present disclosure is shown.

[0037] Figure 8 Another laser emission timing diagram provided in some embodiments of the present disclosure is shown.

[0038] Figure 9 Another laser emission timing diagram provided in some embodiments of the present disclosure is shown.

[0039] Figure 10 Another laser emission timing diagram provided in some embodiments of the present disclosure is shown.

[0040] Figure 11 Another laser emission timing diagram provided in some embodiments of the present disclosure is shown.

[0041] Figure 12 A schematic structural diagram of another laser emitting device provided in some embodiments of the present disclosure is shown.

[0042] Figure 13 A schematic structural diagram of another laser emitting device provided in some embodiments of the present disclosure is shown.

[0043] Figure 14 A schematic diagram of a scanning method of a light source provided in some embodiments of the present disclosure is shown.

[0044] Figure 15 A structural schematic diagram of a light source provided in some embodiments of the present disclosure is shown.

[0045] Figure 16 A schematic structural diagram of another light source provided in some embodiments of the present disclosure is shown.

[0046] Figure 17 A schematic diagram of another scanning method of a light source provided in some embodiments of the present disclosure is shown.

[0047] Figure 18 A schematic diagram of a scanning method of another light source provided in some embodiments of the present disclosure is shown.

[0048] Figure 19 A flow chart of a method for controlling light emission of a light source provided in some embodiments of the present disclosure is shown.

[0049] Figure 20A schematic structural diagram of a light source control device provided in some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the specific embodiments of the present disclosure will be described below with reference to the accompanying drawings. The drawings described below are only some embodiments of the present disclosure. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive efforts. Adjustments and improvements made without departing from the concept of the present disclosure are all within the scope of protection of the present disclosure.

[0051] To simplify the drawings, each figure schematically illustrates only the portions relevant to the corresponding embodiment and does not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, components with identical structures or functions are only partially schematically depicted; in practice, more or fewer components with identical structures or functions may exist.

[0052] In the present disclosure, unless otherwise expressly specified and limited, ordinal numbers such as "first", "second", etc. are only used to distinguish and describe related objects, and cannot be understood as indicating or implying the relative importance or order between related objects; in addition, they do not represent the number of related objects. "Multiple" includes two or more, and other quantifiers are similar. "And / or" is used to describe the relationship between related objects, which includes any combination relationship between related objects, for example, "a and / or b" includes: "a alone", "b alone", or "a and b". "At least one" or "one or more" of multiple objects refers to any object or any combination of multiple objects, for example, "at least one of a1, a2, a3" includes: "a1 alone", "a2 alone", "a3 alone", "a1 and a2", "a1 and a3", "a2 and a3", or "a1, a2 and a3".

[0053] In the embodiments of the present disclosure, "connection" includes direct connection or indirect connection, or includes electrical connection or signal connection. The connected objects can be directly connected through a medium (for example, a wire, a trace, etc.), or can be indirectly connected through other elements, or can be internally connected.

[0054] An optical detection device is a device that uses light as a medium to detect objects. Compared to ordinary light sources, lasers have properties such as monochromaticity and good directionality. Object detection using lasers as a medium has been applied in more and more fields, such as intelligent driving (or autonomous driving), drones, geographic surveying and mapping, environmental monitoring, etc. The optical detection device can be installed on a terminal device to provide perception information to the terminal device so that the terminal device can obtain information about its environment based on the perception information; the optical detection device is, for example, a laser radar (light detection and ranging, LiDAR). The terminal device is, for example, a vehicle, a drone, an industrial robot, a surveying and mapping terminal, or a monitoring terminal.

[0055] The optical detection device emits a laser. After reflecting off an object, a portion of the laser is reflected back to the optical detection device, forming an echo. The optical detection device receives the echo and, based on the received echo, obtains information about the object, such as its distance, position, or velocity, as well as its three-dimensional structure.

[0056] Taking the optical detection device as a laser radar as an example, the structure of a laser radar is described. Figure 1 , which shows a schematic structural diagram of a laser radar provided in some embodiments of the present disclosure. Figure 1 As shown, the laser radar 100 includes a laser emission system 110, a laser receiving system 120, and a control and processing system 130. Optionally, the laser radar 100 also includes a scanning system 140. For example, a mechanical laser radar or a semi-solid laser radar may also include a scanning system 140. The scanning system 140 may include a rotating optical machine, a rotating mirror, an oscillating mirror, a galvanometer, or other equipment that can direct the laser to different directions in the environment.

[0057] The laser emission system 110 can be used to emit laser. After the laser encounters the object 10, it is reflected by the surface of the object 10 to the laser radar 100. The laser receiving system 120 receives the reflected echo and converts it into an electrical signal, providing it to the control and processing system 130. The control and processing system 130 receives the electrical signal and processes the electrical signal to obtain information about the object, such as the distance, position, or speed of the object, and the three-dimensional structure of the object. The laser emission system 110 mainly includes a driving circuit (also called an excitation source), a laser, and an emitting optical element. The laser emits laser light under the drive of the driving circuit, and the laser light is emitted through the emitting optical element.

[0058] The laser receiving system 120 primarily includes a receiving optical element and a detector. The receiving optical element collects the echo after reflection from an object and focuses it on the detector's photosensitive surface. The detector converts the optical signal into an electrical signal using the photoelectric effect. The laser radar 100 may also include a preprocessing circuit. This preprocessing circuit may include a digitizing circuit, such as an analog-to-digital converter (ADC), which converts analog signals into digital signals and provides them to the control and processing system 130. For example, the preprocessing circuit may include a time-to-digital converter (TDC). When the control and processing system 130 controls the laser to emit laser light through the driver circuit, it can synchronize a signal to the TDC to start timing. The echo is then converted to an electrical signal by the detector. This electrical signal can be converted (for example, converted and amplified into a voltage and compared with a reference voltage to determine whether light has entered) and provided to the TDC. Based on the received electrical signal, the TDC can time the echo arrival time and provide this time information to the control and processing system 130. The preprocessing circuit may also include an analog front-end circuit for channel selection and analog signal amplification. The transmitting optical element and the receiving optical element include, for example, one or more optical elements such as lenses, mirrors, filters, beam splitters, etc. The transmitting optical element and the receiving optical element may be independently provided optical elements, or may be fully or partially multiplexed.

[0059] The control and processing system 130 may include an information processing circuit and a light source control circuit. The information processing circuit is used to process electrical signals to obtain information about the object. The information processing circuit may be implemented in the form of an application-specific integrated circuit (ASIC), a hardware circuit implemented by a programmable logic device (PLD), such as a field-programmable gate array (FPGA), a microcontroller unit (MCU), or a digital signal processor (DSP). This implementation method is conducive to improving the efficiency of information processing. In other implementations, the information processing circuit may also be implemented as a central processing unit (CPU). The light source control circuit is used to send control instructions (or signals) to the driver circuit to control the driver circuit to drive the laser to emit light and achieve pulsed laser emission. For example, a timing signal may be sent to control the emission timing of the laser. For example, by configuring the pulse interval, pulse intensity, and pulse width, encoding functions can be added to enhance anti-interference capabilities. The light source control circuit and the information processing circuit can be integrated together, for example, integrated into a main control chip, or they can be independent or partially independent chips. When the laser radar 100 includes a scanning system 140, the control and processing system 130 may also include a scanning control circuit for controlling the scanning system. The scanning control circuit can be integrated with one or all of the light source control circuit and the information processing circuit, for example, the scanning control circuit, the light source control circuit and the information processing circuit are integrated into the main control chip; or they can be independent chips; the embodiments of the present disclosure are not limited. In one implementation, the control and processing system 130 can be implemented in the form of a system on chip (SOC) or an application specific integrated circuit (ASIC).

[0060] LiDARs can be categorized by their beam manipulation (or scanning) method into mechanical, semi-solid-state, and solid-state types. Semi-solid-state LiDARs include, for example, microelectromechanical system (MEMS) LiDARs, rotating mirror LiDARs, or prism LiDARs. Solid-state LiDARs include, for example, optical phase array (OPA) LiDARs and flash (FLASH) LiDARs. Solid-state LiDARs lack a physical (or mechanical) scanning system. For example, OPA LiDARs use electrical signals to control the phase of the light waves emitted by phased array elements, causing interference between the light waves emitted by the elements, thereby achieving a high-intensity beam in the scanning direction, eliminating the need for a physical scanning system. FLASH LiDARs can quickly emit a large laser beam covering the detection area, and then use highly sensitive detectors to create an image of the surrounding environment. FLASH LiDARs are also non-physical scanning radars and lack a scanning system.

[0061] A solid-state laser radar is described below with reference to the accompanying drawings.

[0062] Please refer to Figure 2 , which shows a schematic structural diagram of a solid-state laser radar provided in some embodiments of the present disclosure. Figure 2 As shown, the solid-state laser radar 200 includes a laser emitting device 210 , a laser receiving device 220 and a control circuit 230 .

[0063] Laser emitting device 210 includes a light source assembly 211 and a driving circuit 212 for driving light source assembly 211. In one implementation, light source assembly 211 includes a light array comprising multiple light-emitting zones. The light array can be a two-dimensional array or a one-dimensional array, and can have different arrangements. Figure 3 A schematic diagram of the arrangement structure of a light emitting array provided in some embodiments of the present disclosure is shown. Figure 4 FIG. 1 shows a schematic diagram of another arrangement structure of a light emitting array provided in some embodiments of the present disclosure. Figure 3 、 Figure 4 As shown, each square is used to indicate a light-emitting area 310 or 410 , and does not limit the structure, shape or size of the light-emitting area 310 or 410 . Figure 3 This illustrates a one-dimensional arrangement of a light array. In this light array 300, multiple light-emitting zones 310 are arranged horizontally to form the light array 300. In other implementations, the multiple light-emitting zones can also be arranged vertically or in other directions. The embodiments of the present disclosure do not limit the arrangement direction. This one-dimensional arrangement of the light array can also be referred to as a linear array light source. Figure 4A two-dimensional arrangement of a light-emitting array is shown, which can be expanded on the basis of a one-dimensional arrangement. A plurality of light-emitting areas arranged in multiple rows (e.g., horizontally) and multiple columns (e.g., vertically) constitute a light-emitting array 400. Different rows (or columns) in the two-dimensional array can be aligned or staggered at a certain distance from each other. The row direction and the column direction can be perpendicular to each other or have an angle of other angles. This two-dimensionally arranged light-emitting array can also be called a planar array light source. The driving circuit 212 is used to drive the light source assembly 211 so that the light source assembly 211 emits laser (or laser pulses) under the drive of the driving circuit 212.

[0064] The laser receiving device 220 includes a detection assembly 221. In one implementation, the detection assembly 221 includes a detection array comprising multiple detection zones that can convert optical signals into electrical signals. Similar to the light-emitting array described above, the detection array can be a two-dimensional array or a linear array. This will not be described in detail here; reference will be made to the light-emitting array for further details. The laser receiving device 220 may also include a detection circuit 222 for controlling the detection assembly 221, for example, turning all or some of the detection zones of the detection assembly 221 on or off. Turning on a detection zone may include causing the voltage across the detection zone to reach a bias voltage, or enabling the electrical signal generated by the detection zone to be output via a readout circuit. Turning off a detection zone may include causing the voltage across the detection zone to fall below the bias voltage, or preventing the electrical signal generated by the detection zone from being output via the readout circuit. The light-emitting zones and detection zones may have a corresponding relationship. For example, when a light-emitting zone emits laser light, the corresponding detection zone turns on to detect the echo and output an electrical signal. This correspondence can be one-to-one, one-to-many, many-to-one, or many-to-many, and is not limited in the present embodiment.

[0065] The control circuit 230 is connected to the driver circuit 212 and provides a control instruction C1 to the driver circuit 212. The driver circuit 212 can drive the light source assembly 211 according to the control instruction C1. The control circuit 230 can also be connected to the detection circuit 222 and provide a control instruction C2 to the detection circuit 222. The detection circuit 222 controls the detection assembly 221 according to the control instruction C2. The control circuit 230 can send the control instructions C1 and C2 based on the correspondence between the light-emitting area and the detection area, so that when the light-emitting area emits laser light, the corresponding detection area is activated. The control circuit 230 can be the control and processing system 130 or a part of the control and processing system 130.

[0066] The solid-state laser radar 200 may further include a transmitting optical element 241 and a receiving optical element 242. The laser light emitted by the light source assembly 211 is shaped by the transmitting optical element 241 and then emitted. The echo is converged to the detection assembly 221 through the receiving optical element 242. Figure 2The figure is only for illustration. In actual implementation, the types and quantities of the transmitting optical element 241 and the receiving optical element 242 may include one or more types, and all or part of them may be reused.

[0067] When detecting objects within the same field of view, a lidar can perform multiple repeated measurements, each of which is called a sweep. For example, a single luminous area in the solid-state lidar described above can emit light multiple times within its luminous time (also known as the detection time or time window) for detection, with each luminous area corresponding to a sweep. During a sweep, the luminous area can emit a single laser pulse. Reflected by an object, the laser pulse produces an echo. Multiple laser pulses reflected by an object can produce multiple echoes. These echoes are converted into multiple echo signals by the corresponding detection area. The multiple echo signals corresponding to the laser pulses emitted by the luminous area during a single detection are accumulated. The resulting signal amplitude of the echo signals corresponding to the object is increased, while noise such as ambient light is averaged out. This approach improves echo signal quality, reduces noise interference, and enhances the signal-to-noise ratio. Furthermore, multiple sweeps can enhance the signal strength of weak echoes, improving detection performance for long-range signals or objects with low reflectivity.

[0068] For example, please refer to Figure 5 , which shows a schematic diagram of the scanning and echo signal accumulation during a detection process of a laser radar provided in some embodiments of the present disclosure. For example, a total of S scans are performed in one detection, such as Figure 5 As shown on the left side of the figure. One laser pulse is emitted per scan. Figure 5 As shown in the middle right side, the echo signals of these S scans are accumulated in sequence, and the amplitude of the echo signals is increased after the accumulation. The embodiment of the present disclosure does not limit the number of scans (or the number of repeated measurements) S, and can be, for example, 400-500 times, or even thousands of times, or more or less.

[0069] When the laser radar is detecting, the light-emitting area emits laser pulses in sequence to scan multiple times. Figure 4Taking the two-dimensional array shown as an example, the two-dimensional array includes m*n light-emitting areas, where m and n are both positive integers greater than or equal to 2, and m and n can be equal or unequal. Rx represents the row coordinate, and Cy represents the column coordinate. RxCy can be used to represent the light-emitting area at the corresponding coordinate position, where x∈[1,m] and y∈[1,n]. Assume that the light-emitting areas are scanned multiple times in order from left to right and from top to bottom, starting with light-emitting area R1C1. When light-emitting area RmCn completes multiple scans, the lidar completes a detection. For lidars that perform multiple scans for detection, the light-emitting area will continuously emit multiple laser pulses within its relatively short light-emitting time (or time window). The emission energy of multiple laser pulses accumulates in a short period of time, which may pose a safety hazard, such as a potential safety hazard. Safety hazards can be reduced by limiting the emission energy of each laser pulse or by limiting the number of laser pulses emitted, but these methods may affect the detection performance of the lidar.

[0070] The disclosed embodiments provide a laser emitting device capable of detecting objects using a parallel scanning method. In this parallel scanning method, the light-emitting areas of a light source are scanned in groups. Within a time window, multiple light-emitting areas within a group are controlled to emit laser light, for example, in different time sequences or synchronously. This can improve the detection performance and safety of optical detection devices.

[0071] In the embodiment of the present disclosure, each light-emitting area may correspond to a laser, and the driving circuit controls the light-emitting area corresponding to the laser by driving the laser. Alternatively, each light-emitting area may correspond to multiple lasers (referred to as a laser group), and the driving circuit controls the light-emitting area corresponding to the laser group by driving the laser group. Alternatively, one laser may correspond to multiple light-emitting areas. For example, a laser is provided with multiple light-emitting points (also known as light-emitting holes), and the light-emitting points of different light-emitting areas may use different solder pads. The driving circuit may drive the light-emitting points through the solder pads to control the light-emitting area corresponding to the light-emitting points.

[0072] In some embodiments, the light-emitting zones of the light-emitting assembly 211 can be individually addressed (or individually controlled) by the driver circuit 212. For example, the driver circuit 212 can independently control whether a light-emitting zone emits light, the number of laser pulses emitted, the intensity of the emitted laser pulses, and the like. In some embodiments, the light-emitting assembly 211 can include multiple light-emitting zone subsets. Each light-emitting zone subset can be individually addressed (or individually controlled) by the driver circuit 212. Different light-emitting zone subsets can include the same or different numbers of light-emitting zones.

[0073] The laser may be, for example, a semiconductor laser, a fiber laser, or another type of laser. The semiconductor laser may include, for example, a laser emitting circuit, a vertical cavity surface emitting laser (VCSEL), an edge emitting laser (EEL), a distributed feedback laser (DFB), or a similar device. The above is merely an example, and the embodiments of the present disclosure do not limit the type of laser.

[0074] Similar to the description of the light-emitting area and the laser above, a detection area can correspond to a photodetector or multiple photodetectors. The detection circuit can control the corresponding detection area by controlling the photodetector. The detection area of the detection component 221 can be individually addressed (or individually controlled) by the detection circuit 222. For example, the detection circuit 222 can independently control whether a detection area is turned on. Alternatively, the detection component 221 includes multiple detection area subsets, and a detection area subset can be individually addressed (or individually controlled) by the detection circuit 222. The number of detection areas included in different detection area subsets can be the same or different.

[0075] The photodetector includes, for example, a photodetection circuit, a PIN photodiode (PINPD), an avalanche photodiode (APD), a single photon avalanche diode (SPAD), a silicon photomultiplier (SiPM), or similar devices.

[0076] The following description uses the light-emitting area as an example. In other embodiments, when the light-emitting area corresponds to a laser, it can be replaced by the laser; when the light-emitting area corresponds to a laser group, it can be replaced by a laser group, and a laser group includes multiple lasers; when the light-emitting area corresponds to the light-emitting point of a laser, it can be replaced by the light-emitting point of the laser.

[0077] In one implementation, a laser emitting device is provided, such as Figure 6 As shown, the laser emitting device 600 includes a driving circuit 610 and a first light source 620. Figure 3 and Figure 4, the first light source 620 may include, for example, at least one of the light-emitting array 300 and the light-emitting array 400. The first light source 620 includes multiple light-emitting areas 310 and 410. The driving circuit 610 is used to drive the first light source 620. The light-emitting area of the first light source 620 can be divided into multiple light-emitting area groups, and the number of light-emitting areas in different light-emitting area groups can be the same or different. Taking into account the difference in the number and arrangement of light-emitting areas, it is allowed that some light-emitting area groups include one light-emitting area, and other light-emitting area groups include at least two (i.e., multiple) light-emitting areas. The driving circuit 610 can drive the first light source 620 in the form of light-emitting area groups. For example, the driving circuit 610 drives the light-emitting areas in the light-emitting area group to emit lasers within the same time window. For example, the first light source 620 includes a first light-emitting area group, the first light-emitting area group includes at least two first light-emitting areas, and the driving circuit 610 drives at least two first light-emitting areas in the first light-emitting area group to emit lasers within the first time window. Please refer to Figure 2 When the laser emitting device 600 is applied to a solid-state laser radar, it can be a laser emitting device 210, and the light source component 211 includes a first light source 620; the driving circuit 212 is similar to the driving circuit 610, and is used to drive the first light source 620.

[0078] In some embodiments, a parallel scanning method is adopted to regard at least two light-emitting areas of the first light source as a light-emitting area group, which can also be called a parallel light-emitting group or a parallel scanning group. The number of light-emitting areas included in different light-emitting area groups can be the same or different. For example, the first light-emitting area group includes two light-emitting areas, and the second light-emitting area group includes four light-emitting areas. At least two light-emitting areas of a light-emitting area group can emit lasers in the same time window. The detection area corresponding to the light-emitting area group can be turned on in the time window to receive echoes and output electrical signals. The light-emitting areas of different light-emitting area groups can emit lasers in different time windows. For example, the first light-emitting area group emits lasers in the first time window, and the second light-emitting area group emits lasers in the second time window. The first time window and the second time window can have no overlapping time, or they can have a certain overlapping time. The duration of the time windows of different light-emitting area groups can be the same or different. The number of laser pulses emitted by different light-emitting areas of a light-emitting area group in a time window can be the same or different. Figure 4 Taking the first light source as an example, a light-emitting area group includes a light-emitting area R1C1 and a light-emitting area R1C2. Within a time window, both the light-emitting area R1C1 and the light-emitting area R1C2 can emit laser light.

[0079] In one implementation, within a time window, different light-emitting areas within a light-emitting area group can emit laser pulses in the same timing. The timing can indicate the timing at which the light-emitting areas emit one or more laser pulses in sequence, and can also be referred to as the emission timing (or light-emitting timing). Illuminating with the same timing means that at least two first light-emitting areas in the first light-emitting area group have the same emission timing and can synchronously emit lasers within the same time window under the drive of the driving circuit. This method of emitting lasers can also be referred to as synchronous scanning. For example, the first light-emitting area in the light-emitting area group emits a laser pulse at times T1, T2, and T3, respectively, and the second light-emitting area in the light-emitting area group also emits a laser pulse at times T1, T2, and T3, respectively. In synchronous scanning, the design complexity of the timing is low and easy to implement.

[0080] In another implementation, within a time window, different light-emitting areas within a light-emitting area group emit laser pulses at different timings. Lighting with different timings means that at least two first light-emitting areas within a first light-emitting area group have different emission timings. Driven by a driving circuit, these areas can each emit multiple laser pulses within the same time window, with at least some of their pulses staggered. This laser emission method can also be referred to as asynchronous scanning. For example, a first light-emitting area within a light-emitting area group emits one or more laser pulses at a first timing, while a second light-emitting area within the same light-emitting area group emits one or more laser pulses at a second timing. The laser pulse emission times in the first and second timings are not completely aligned. Within the same time window, different light-emitting areas within a light-emitting area group can complete their own multiple scans in parallel. Using different timings during parallel scanning of multiple light-emitting areas can result in interleaving (or interleaving) of laser emission times between different light-emitting areas. This interleaving (or interleaving) can be uniform or non-uniform. This approach can extend the time interval between adjacent laser pulses within the same light-emitting area while further reducing the number of laser pulses emitted simultaneously by the first light source, thereby reducing the laser energy emitted by the lidar at the same time and enhancing safety. Furthermore, because multiple luminous zones scanned in parallel within the same time window can emit lasers at different times, the energy of each laser pulse can be increased while ensuring eye safety, enhancing the LiDAR's ranging capability. Multiple luminous zones scanned in parallel can emit laser pulses at different times, and the corresponding echoes can return to the detection zone at different times, reducing mutual interference between different detection zones and improving detection accuracy.

[0081] Please refer to Figure 7-11, which shows several exemplary laser emission timing diagrams provided in some embodiments of the present disclosure. Taking a light-emitting area group including light-emitting area A and light-emitting area B as an example, more light-emitting areas may be optionally included. When a light-emitting area group includes more light-emitting areas, the emission timing of the light-emitting areas may be set in the same or similar manner as when it includes two light-emitting areas. Light-emitting area A emits laser according to a first timing, and light-emitting area B emits laser according to a second timing. The first timing and the second timing may be the same. Alternatively, the first timing and the second timing may be different, for example, the light-emitting timings in the first timing and the second timing are at least partially different. For example, there are interspersed (or interlaced) light-emitting timings between the first timing and the second timing: there is at least one laser emission from light-emitting area B between two laser emissions from light-emitting area A; and / or, there is at least one laser emission from light-emitting area A between two laser emissions from light-emitting area B.

[0082] like Figure 7-11 As shown, [0-T] is a time window. In a time window T, the first timing of the light-emitting area A emitting laser is shown in the timing diagram on the upper side of the figure, and the second timing of the light-emitting area B emitting laser is shown in the timing diagram on the lower side of the figure. A square wave in the figure is used to indicate a laser pulse. The shape and amplitude of the square wave are only for illustration and do not represent the shape, pulse width, emission intensity, energy or power of the pulse. The present disclosure does not limit this. Assume that in a time window T, the light-emitting area A emits laser M times and the light-emitting area B emits laser N times. M and N are the number of laser emissions of the light-emitting area A and the light-emitting area B in a time window T, respectively. M and N can be equal or different.

[0083] The first timing and the second timing may be the same. Figure 7 As shown, the light-emitting area A and the light-emitting area B emit lasers synchronously. The first timing of the light-emitting area A and the second timing of the light-emitting area B can be achieved through a periodic timing.

[0084] The first timing and the second timing may be different. In one example, Figure 8 As shown, the light-emitting area A and the light-emitting area B emit lasers alternately. The first timing of the light-emitting area A and the second timing of the light-emitting area B can be achieved through a periodic timing. The periodic emission timing is simple to design and the echo processing algorithm is simple to implement. For example, each laser emission opportunity can be delayed for a certain time on the basis of the first timing to obtain the second timing. It is understandable that the first timing of the light-emitting area A and the second timing of the light-emitting area B can also be achieved through a non-periodic timing. This method of alternating laser emission of different light-emitting areas within the light-emitting area group is also called alternating scanning. In one example, as Figure 9 As shown, the light emitting area A emits the i-th laser at time t1, and then the light emitting area B emits the j-th laser at time t2, and then the light emitting area A emits the i+1-th laser at time t3. In another example, as Figure 10 As shown, the light-emitting region A emits the i-th laser at time t1, and then from t2 to t 2+b time, the light-emitting region B emits the j-th to the (j + b)-th lasers, and at t 2+b time, after t3, the light-emitting region A emits the (i + 1)-th laser.

[0085] In another example, as Figure 11 shown, the light-emitting region A emits the i-th to the (i + a)-th lasers from t1 to t 1+a time, and then from t2 to t 2+b time, the light-emitting region B emits the j-th to the (j + b)-th lasers, and at t 2+b time, after t3, the light-emitting region A emits the (i + a + 1)-th laser. Here, i ∈ [1, M], j ∈ [1, N], 1 ≤ a < M, 1 ≤ b < N. The situations in the above examples can all or partially occur within a time window. One or more light-emitting opportunities of the light-emitting region B can be inserted between two light-emitting opportunities of the light-emitting region A. Similarly, one or more light-emitting opportunities of the light-emitting region A can be inserted between two light-emitting opportunities of the light-emitting region B.

[0086] In some embodiments, within a time window, different light-emitting regions in the light-emitting region group can emit lasers (or laser pulses) in parallel. When the total detection time of the entire field of view of the lidar is determined, by adopting the method of parallel scanning with multiple light-emitting regions, the time window allocated to a light-emitting region can be extended. The light-emitting time window allocated to each light-emitting region is determined by the total detection time and the number of light-emitting regions that perform parallel scanning. For example, assuming that the total light-emitting time of the entire light-emitting array is t0, and the light-emitting array includes 12 * 10 light-emitting regions, when adopting the method of sequential scanning (or sequential light emission) of multiple light-emitting regions, the light-emitting time allocated to a light-emitting region can be estimated as t0 / 120; when adopting the method of parallel scanning (or parallel light emission) with, for example, 2 light-emitting regions, the light-emitting time window allocated to a light-emitting region can be estimated as t0 / 60. Compared with the sequential scanning method, the light-emitting time window of a light-emitting region can be extended. The light-emitting region emits multiple laser pulses sequentially within a longer time window, and the emission time interval between adjacent two laser pulses can be extended. For example, multiple laser pulses (such as 400, or less or more) emitted by a light-emitting region can be emitted within a longer time window, and the time interval between two adjacent laser pulses of the same light-emitting region can become larger. This can reduce the cumulative energy of the laser beams in the same detection area per unit time and improve the safety performance of the optical detection device; at the same time, it can ensure the number of laser pulses emitted by a light-emitting region and take into account the detection performance.

[0087] In the above description, the number of light-emitting areas in the light-emitting area group is 2 as an example. In other implementations, there may be more light-emitting areas in the light-emitting area group. Different light-emitting areas in the light-emitting area group may emit lasers in the same timing; or different light-emitting areas in the light-emitting area group may emit lasers in different timings. Different timings may include all or part of the light-emitting timings being different (completely different or not completely the same). For example, Figure 8 In the alternate emission mode shown in FIG, the light emission timings of different light emitting areas are all different; for example, in Figures 9-11 In the emission mode shown, the emission timings of different light-emitting areas are partially different, for example, the emission timings of the laser are not completely consistent (including partially consistent emission timings of the laser, for example Figures 9-11 In addition, in the light-emitting area group, the number of laser beams emitted by each light-emitting area can also be different, for example, Figures 9-11 In the emission mode shown, the values of M and N can be different. The number of laser emissions (or scan times or number of laser pulses) of a light emitting area can be preset or dynamically adjusted based on the feedback of the detection results of the corresponding detection area.

[0088] In an implementation where different light-emitting zones within a light-emitting zone group emit laser light at different time sequences, the time sequence for each light-emitting zone or a portion of the light-emitting zones to emit laser light can be a random sequence. Random sequences include pseudo-random sequences. For example, a random time sequence can be generated by a control and processing system, or a random time sequence can be pre-stored in the control and processing system. The driving circuit can sequentially drive the light-emitting zones to emit multiple laser pulses according to the random time sequence. Different light-emitting zones scanned in parallel can use different random sequences. Different light-emitting zones scanned non-parallel can use the same random sequence. This can reduce the complexity of the emission timing design and also reduce interference between detection zones scanned in parallel.

[0089] In some embodiments of the present disclosure, the light-emitting areas within a light-emitting area group may be adjacent light-emitting areas, for example Figure 4 The light-emitting areas R1C1 and R1C2, or the light-emitting areas R1C1 and R2C1, etc. are shown. In some embodiments, the light-emitting areas of a light-emitting area group may be non-adjacent light-emitting areas. For example, the first light source is a first light-emitting array, and at least two first light-emitting areas in the first light-emitting area group in the first light-emitting array are not adjacent to each other. The positions of the multiple light-emitting areas that emit laser light in the same time window in the first light-emitting array are not adjacent, for example, there are other light-emitting areas in the middle, and the other light-emitting areas do not emit laser light in the time window. For example Figure 4The light-emitting areas R1C1 and R1C3, or R1C1 and R3C1, or R1C1 and R2C2, etc. are shown. The light-emitting areas scanned in parallel are not adjacent, so that there is a certain distance between the light-emitting areas scanned in parallel, and the light beams emitted by them are also spaced a certain distance apart in space, which can reduce the increase in the degree of beam intensity superposition caused by beam overlap and further improve safety performance. In one implementation, the light-emitting areas in the light-emitting area group are located in the same row and are not adjacent in the row, for example Figure 4 In another implementation, the light-emitting areas in the light-emitting area group are located in the same column and are not adjacent in the column, for example Figure 4 In another implementation, the light-emitting areas within a light-emitting area group are located in different rows and columns, such as light-emitting area R1C1 and light-emitting area R2C2, or light-emitting area R1C1 and light-emitting area R3C2. The above are merely examples, and the non-adjacent light-emitting areas within a light-emitting area group can also be arranged in other ways. The embodiments of the present disclosure do not limit the non-adjacent light-emitting areas within a light-emitting area group.

[0090] In some embodiments of the present disclosure, the light-emitting areas within a light-emitting area group may be located in the same row or column of the light-emitting array. Alternatively, the light-emitting array may implement independent control (or addressing) of a light-emitting area through a row driver circuit and a column driver circuit. For example, please refer to Figure 12 , which shows a schematic structural diagram of another laser emitting device in some embodiments of the present disclosure. Figure 12 As shown, the laser emitting device 1200 includes a driving circuit and a first light source 1230. The driving circuit may include a row driving circuit 1210 and a column driving circuit 1220. For example, the light-emitting areas of the same row can be connected to a driving channel of the row driving circuit after being interconnected by anodes (or cathodes), and the light-emitting areas of the same column can be connected to a driving channel of the column driving circuit after being interconnected by cathodes (or anodes). When the light-emitting areas within a light-emitting area group are located in the same row of the light-emitting array, within the time window corresponding to the light-emitting area group, the driving channel connected to the row in the row driving circuit 1210 is in the on state, and the multiple driving channels of the column driving circuit 1220 corresponding to the multiple light-emitting areas of the light-emitting area group can be turned on in sequence, so that the multiple light-emitting areas emit lasers in sequence. Thereby, the control (or addressing) of the light-emitting areas within the light-emitting area group can be achieved. Refer to Figure 12Assuming that the anodes of the light-emitting areas in the same row are interconnected, and the cathodes of the light-emitting areas in the same column are interconnected, taking a light-emitting area group including light-emitting areas R1C1 and R1C4 as an example, within the time window corresponding to this light-emitting area group, the row driver circuit 1210 controls the anode drive channel of row R1 to be in the conductive state, and the column driver circuit 1220 controls the cathode drive channels of columns C1 and C4 to be conductive and to control light-emitting areas R1C1 and R1C4 to emit lasers in sequence according to the corresponding light-emitting timing. This enables parallel scanning of light-emitting areas R1C1 and R1C4 within the corresponding time window. Similarly, when the light-emitting areas within a light-emitting area group are located in the same column of the light-emitting array, within the time window corresponding to the light-emitting area group, the driving channel connected to the column in the column driving circuit 1220 is in the on state, and the multiple driving channels of the row driving circuit 1210 corresponding to the multiple light-emitting areas of the light-emitting area group can be turned on in time sequence, so that the multiple light-emitting areas of the light-emitting area group emit lasers in time sequence, and the driving channels connected to the rows of other light-emitting areas in the column are in the off state, thereby realizing the control (or addressing) of the light-emitting areas in the light-emitting group. Figure 12 Taking a light-emitting area group including light-emitting areas R2C2 and R4C2 as an example, assuming that the anodes of the light-emitting areas in the same column are interconnected, and the cathodes of the light-emitting areas in the same row are interconnected, within the time window corresponding to the light-emitting area group, column driver circuit 1220 controls the anode drive channel of column C2 to be in an on state. Row driver circuit 1210 controls the emission timing of light-emitting areas R2C2 and R4C2 by turning on and off the cathode drive channels of rows R2 and R4, thereby achieving parallel scanning of R2C2 and R4C2 within the corresponding time window. Configuring the light-emitting areas within a light-emitting area group in the same row or column simplifies parallel scanning drive, reduces implementation costs, and helps extend the service life of the driver circuit and reduce maintenance costs.

[0091] Please refer to Figure 13 , which shows a schematic structural diagram of another laser emitting device provided in some embodiments of the present disclosure. The laser emitting device 1310 includes a row driving circuit 1311 and a column driving circuit 1312, and a first light source 1313. The row driving circuit 1311 and the column driving circuit 1312 drive the first light source 1313 to emit laser light under the control of the control circuit 1320. Figure 13 As shown, the row driving circuit 1311 and the column driving circuit 1312 may include transistors. For example, the row driving circuit includes a plurality of driving transistors E1, which are respectively interconnected with a plurality of row anodes of the light emitting array, and the column driving circuit includes a plurality of driving transistors E2, which are respectively interconnected with a plurality of column cathodes of the light emitting array. Figure 13As shown, the light-emitting areas in the same row can be interconnected by anodes, and the light-emitting areas in the same column can be interconnected by cathodes. Alternatively, the light-emitting areas in the same row can be interconnected by cathodes, and the light-emitting areas in the same column can be interconnected by anodes. In this way, the light-emitting areas can be addressed by turning on the combination of rows and columns through the transistors in the row drive circuit 1311 and the column drive circuit 1312, so that each light-emitting area can be independently addressed or controlled. In one implementation, the light-emitting area can be turned on or off by applying different trigger signals to the anode drive channel and the cathode drive channel of the light-emitting area. For example, the trigger signal can be a high level (H), a low level (L), or a high impedance (Z). The trigger signal applied to the anode drive channel of the light-emitting area can be a high level (H) or a low level (L). The trigger signal applied to the cathode drive channel of the light-emitting area can be a low level (L). In one implementation, the trigger signal of the cathode drive channel can also be a high impedance (Z). High impedance triggering is beneficial for protecting the light-emitting area and improving the reliability of the laser emitting device. When the anode drive channel of the light-emitting area is connected to a high level (H) and the cathode drive channel is connected to a low level (L), the light-emitting area is turned on (for example Figure 13 The light-emitting areas V1-V4 in the light-emitting area group). When the cathode drive channel of the light-emitting area is connected to a high impedance (Z), or when the anode drive channel of the light-emitting area is connected to a low level (L), the light-emitting area is not turned on. By changing the trigger signal of the anode drive channel or the cathode drive channel separately, the rapid on or off of the light-emitting area can be controlled. For example, in the first time window, by applying a high level (H) to the anode 1 and applying a low level (L) trigger signal to the drive channel of the cathode 1 and the drive channel of the cathode 3 in sequence, the light-emitting areas V1 and V2 in the first light-emitting area group can be emitted in sequence; in the second time window, by applying a high level (H) to the drive channel of the anode 5 and applying a low level (L) trigger signal to the drive channel of the cathode 1 and the drive channel of the cathode 3 in sequence, the light-emitting areas V3 and V4 in the second light-emitting area group can be emitted in sequence.

[0092] The first light source 620 may include multiple light-emitting area groups. The light-emitting area groups within the multiple light-emitting area groups can be parallel scanned in a manner similar to or similar to the parallel scanning of light-emitting areas within the light-emitting area groups in any of the above embodiments. The disclosed embodiments provide an inter-group scanning method that can achieve overall scanning of the light-emitting array. Considering that the object detected by the optical detection device may be a moving object, or the optical detection device may be in motion (for example, when installed on a vehicle, moving with the vehicle), when detecting relatively moving objects, the laser radar minimizes motion blur in the detection results to improve detection performance. This inter-group scanning method can be combined with the parallel scanning method in any of the embodiments, or implemented independently. This inter-group scanning method can reduce or resolve motion blur and improve detection performance. This inter-group scanning method includes: when the distance between the light-emitting area groups is less than a first distance threshold (to distinguish it from the distance threshold in other embodiments, this distance threshold is referred to as the first distance threshold here), the time difference between the time windows of the light-emitting area groups is less than or equal to the first time threshold (to distinguish it from the distance threshold in other embodiments, this time threshold is referred to as the first time threshold here). The spacing distance between luminous area groups includes the distance between a luminous area in one luminous area group and a luminous area in another luminous area group. This distance can be expressed as spatial dimensions, the number of luminous areas, or the spatial coordinates of the luminous areas, though this disclosure is not limited thereto. This distance can be determined by the distance between reference points in the luminous areas. The reference point can be any point in the luminous area, such as any point on the edge, the center, or any other point within the luminous area. The first distance threshold is not limited and can be determined based on the design parameters of the LiDAR. Design parameters may include, for example, the actual arrangement of light sources, the size of the luminous areas, the time window of the luminous areas, and the ranging range of the LiDAR. The first distance threshold can be, for example, 1-8 luminous areas, such as 2, 3, or 4 luminous areas. The first time threshold is not limited and can be determined based on the design parameters of the LiDAR. Design parameters may include, for example, the number of laser pulses emitted by the luminous areas, the time window of the luminous areas, and the ranging range of the LiDAR. The first time threshold can be, for example, 1-3 time windows. For critical states, for example, when the interval distance between the luminous area groups is equal to the distance threshold, the time difference between the time windows of the luminous area groups may not be limited; alternatively, the time difference between the time windows of the luminous area groups may be limited in the same manner as when the interval distance is less than the distance threshold.

[0093] In some embodiments, the first light source includes a first light-emitting area group and a second light-emitting area group. The first light-emitting area group emits laser light within a first time window, and the second light-emitting area group emits laser light within a second time window. The first light-emitting area group includes at least two first light-emitting areas. The second light-emitting area group includes at least two second light-emitting areas. If the distance between at least one first light-emitting area in the first light-emitting area group and at least one second light-emitting area in the second light-emitting area group is less than or equal to a first distance threshold, then the time difference between the first time window of the first light-emitting area group and the second time window of the second light-emitting area group is less than or equal to the first time threshold. In one implementation, the distance between at least one first light-emitting area in the first light-emitting area group and at least one second light-emitting area in the second light-emitting area group in any direction is no more than a threshold number of light-emitting areas, for example, no more than two light-emitting areas. For example, at least one first light-emitting area in the first light-emitting area group is adjacent to at least one second light-emitting area in the second light-emitting area group. Adjacent light-emitting areas can detect adjacent fields of view in space. By limiting the time difference between the time windows of adjacent light-emitting areas (or adjacent fields of view), motion blur can be reduced. For example, when adjacent luminous zones are detecting the same object, the LiDAR may experience relative motion with the object. However, due to the time difference between the time windows defining the adjacent luminous zones, the two luminous zones complete their scans within a similar timeframe, resulting in a shorter time interval between detection results and a lower amplitude of object motion, thus reducing motion blur. The above distance thresholds or time thresholds can be preset values or adjustable parameters.

[0094] Please refer to Figure 14 , which illustrates an exemplary scanning method of a light source provided in some embodiments of the present disclosure. The first light source 620 includes multiple light-emitting area groups, each light-emitting area group including two light-emitting areas. For ease of understanding, each light-emitting area group is used as an example to include two light-emitting areas. In other embodiments, a light-emitting area group may also include more light-emitting areas.

[0095] like Figure 14As shown, blank squares represent unscanned light-emitting areas; cross-filled squares represent light-emitting areas currently being scanned, and the light-emitting areas currently being scanned constitute a light-emitting area group (i.e., a parallel light-emitting group); and squares filled with diagonal lines represent light-emitting areas that have completed scanning. In the first time window, light-emitting areas R1C1 and R1C3 of the first light-emitting area group are scanned in parallel. In the second time window, light-emitting areas R1C2 and R1C4 of the second light-emitting area group are scanned in parallel. This continues in this way until, in the p-th time window, light-emitting areas R7C6 and R7C8 of the p-th light-emitting area group are scanned in parallel, completing the scanning of all light-emitting areas in the first light source. Wherein p is the number of light-emitting area groups in the first light source. The embodiment of the present disclosure does not limit its value. The value of p can be determined based on the size of the light-emitting array of the first light source and the division method of the light-emitting area groups. The above first light-emitting area group and second light-emitting area group can be the light-emitting area groups corresponding to any two adjacent time windows from the first light-emitting area group to the p-th light-emitting area group. Figure 14 By controlling the time difference between the time windows of adjacent light-emitting areas, two adjacent light-emitting areas are scanned within adjacent time windows, reducing motion blur and simplifying inter-group scanning. For example, this can be accomplished through periodic control. In other implementations, the time difference between the time windows of the first and second light-emitting area groups can be longer or shorter, and the distance between the first and second light-emitting area groups can be larger or smaller.

[0096] Figure 14 A row scanning method between groups is shown, i.e., the light-emitting areas within the first and second light-emitting area groups are located in the same row, and the light-emitting area groups are scanned in row order. In other implementations, a column scanning method can be used between groups, i.e., the light-emitting areas within the first and second light-emitting area groups are located in the same column, and the light-emitting area groups are scanned in column order. This implementation is similar to the row scanning method between groups.

[0097] When the number of light-emitting areas within a row (or column) of a light-emitting array supports even distribution of light-emitting area groups within that row (or column), each light-emitting area group can include the same number of light-emitting areas. When the number of light-emitting areas within a row (or column) of a light-emitting array does not support even distribution of light-emitting area groups within that row (or column), light-emitting areas from other rows (or columns) can be allocated to some light-emitting area groups, so that each light-emitting area group includes the same number of light-emitting areas. Alternatively, a majority of light-emitting area groups include the same number of light-emitting areas, with the remaining light-emitting areas less than the specified number forming a light-emitting area group. For example, if two light-emitting areas form a light-emitting area group, and there is one remaining light-emitting area, that light-emitting area can be independently designated as a light-emitting area group. For another example, if three light-emitting areas form a light-emitting area group, and there are two or one remaining light-emitting areas, those remaining two or one remaining light-emitting areas can be independently designated as a light-emitting area group. This allows for simpler scanning control based on the actual situation of the light-emitting array.

[0098] The 7*8 light-emitting array here, and each light-emitting area group includes two light-emitting areas, and the two light-emitting areas are located in the same row and are separated by one light-emitting area, are only examples. In other embodiments, the light-emitting array may include more or fewer light-emitting areas. The light-emitting array may be a one-dimensional array. The number of light-emitting areas included in different light-emitting area groups may be the same or different, and the distribution method may be the same or different. The light-emitting areas in a light-emitting area group may be adjacent or non-adjacent. The light-emitting areas in a light-emitting area group may be located in the same row or the same column, or in different rows or different columns. When controlling the scanning between groups, if the light-emitting areas in the first light-emitting area group and the second light-emitting area group have adjacent fields of view, the driving circuit may control the time difference between the time windows of the first light-emitting area group and the second light-emitting area group to be less than or equal to the time threshold, thereby reducing the possibility of motion blur and improving the detection performance of the optical detection device.

[0099] The above embodiment shows a uniform detection effect in the entire field of view. In other embodiments, a non-uniform detection effect can also be achieved in the entire field of view. For example, please refer to Figure 15 , which shows a structural schematic diagram of a light source provided in some embodiments of the present disclosure. The light source 1500 includes a first light source 1510 (blank square area) and a second light source 1520 (point-filled square area). The second light source 1520 corresponds to, for example, a range enhanced area (REA), and the first light source 1510 corresponds to, for example, a non-REA area (blank square area). Compared with the non-REA area, the REA area can achieve higher detection performance, such as a longer detection distance, higher spatial resolution, etc. For example, the maximum detection distance of the second light source 1520 is greater than the maximum detection distance of the first light source 1510. Figure 15The second light source 1520 is located in the center of the first light source 1510, which is merely an example. In other implementations, the second light source 1520 may be located elsewhere relative to the first light source 1510, for example, moved left or right to the left or right edge of the first light source 1510, or moved upward or downward to the upper or lower edge of the first light source 1510, or moved in any other direction. Furthermore, the size, number, or arrangement of the first and second light sources 1510, 1520 are merely examples. In other embodiments, more or fewer light-emitting areas may be included, or the areas may be arranged in other ways, such as having a greater number of light-emitting areas in the columns than in the rows, or having an equal number of light-emitting areas in the rows and columns. Furthermore, as with the light-emitting areas in the above embodiments, the structure, shape, or size of the light-emitting areas is not limited here. Although the light-emitting area of the second light source 1520 appears smaller than that of the first light source 1520 in the figure, this is merely illustrative; the light-emitting area of the second light source 1520 may also be larger than that of the first light source 1520. The luminous area can correspond to a certain field of view. The field of view corresponding to the luminous area of the second light source 1520 can be smaller than or equal to the field of view of the luminous area of the first light source 1520. In some embodiments, the luminous area of the second light source 1520 can have a smaller laser divergence angle. This more concentrated beam can facilitate detection at longer distances.

[0100] The second light source may also adopt the above parallel scanning method and / or the above inter-group scanning method. For example, the second light source includes a third light-emitting area group, and the third light-emitting area group includes at least two third light-emitting areas. The driving circuit is also used to drive the second light source, and the driving circuit drives at least two third light-emitting areas in the third light-emitting area group to emit laser light within a third time window. For example, the driving circuit is used to drive at least two third light-emitting areas in the third light-emitting area group to emit laser light at different time sequences or at the same time sequence within the third time window. The parallel scanning of the second light source can be implemented in the same or similar manner as the embodiment of the parallel scanning of the first light source. The inter-group scanning of the second light source can be implemented in the same or similar manner as the embodiment of the inter-group scanning of the first light source.

[0101] In some embodiments of the present disclosure, the light source can also realize other non-uniform detection methods. For example, please refer to Figure 16, which shows a schematic structural diagram of another light source provided in some embodiments of the present disclosure. The light source 1600 includes a first light source 1610 (blank square area), a second light source 1620 (dot-filled square area), and a third light source 1630 (slash-filled square area). The second light source 1620 and the third light source 1630 can, for example, correspond to REA areas. The maximum detection distance of the second light source 1620 is greater than the maximum detection distance of the third light source 1630, and the maximum detection distance of the third light source 1630 is greater than the maximum detection distance of the first light source 1610. Figure 16 The second light source 1620 is located in the central area of the first light source 1610, and the third light source 1630 is arranged around the second light source 1620. This is only an example. In other implementations, the second light source 1620 can also be located at other positions of the first light source 1610, for example, moving left or right to the left or right edge of the first light source 1610, or moving up or down to the upper or lower edge of the first light source 1610, or moving any displacement in any other direction, etc. The position of the third light source 1630 is similar. The present disclosure does not limit the size of the second light source 1620 and the third light source 1630, including the number of light-emitting areas, or the arrangement method, etc. Figure 15 similar, Figure 16 The structure, shape or size of the light emitting areas in different light sources is not limited. The third light source can also adopt the above parallel scanning method and / or the above inter-group scanning method.

[0102] exist Figure 15 and Figure 16 In the light source arrangement shown, the first light sources 1510 and 1610 can correspond to the edge field of view, such as the sky, where there are fewer objects, so the detection distance can be relatively smaller; for example, the ground, where the distance to objects is closer, so the detection distance can be relatively smaller. The closer the detection distance of the edge area, the more detection time can be reserved for the central field of view, thereby achieving longer-distance detection of the area of interest. In other implementations, if the area of interest is not in the center, the position of the second light sources 1520 and 1620, or the third light source 1630 can be adjusted so that the area of interest has a longer-distance detection capability. Therefore, the position of the second light source or the third light source can be adjusted according to the area of interest, and the embodiments of the present disclosure are not limited thereto.

[0103] Below Figure 15 Taking the light source shown in the figure as an example, several scanning methods are described in combination with the accompanying drawings. Figure 16The light sources shown can be similarly expanded. The first light source is scanned in the same or similar manner as the parallel scanning and / or inter-group scanning in the aforementioned embodiment. The second light source is scanned in the same or similar manner as the parallel scanning and / or inter-group scanning in the aforementioned embodiment. The number of luminous areas in the luminous area group of the first light source can be the same as or different from the number of luminous areas in the luminous area group of the second light source. Similarly, Figure 16 In the embodiment, some or all of the first, second, and third light sources are scanned using the same or similar method as the parallel scanning and / or inter-group scanning in the aforementioned embodiment. The number of light-emitting areas in the light-emitting area group of the first light source, the number of light-emitting areas in the light-emitting area group of the second light source, and the number of light-emitting areas in the light-emitting area group of the third light source can be all or some of the same, or all different.

[0104] Please refer to Figure 17 , which shows a schematic diagram of another light source scanning method provided in some embodiments of the present disclosure. Figure 17 As shown, the light source includes a first light source and a second light source. The light emitting area group of the second light source includes more light emitting areas than the light emitting area group of the first light source. Figure 17 In the example, five light-emitting areas are used. In other embodiments, there may be more or fewer light-emitting areas. In addition, the light-emitting areas in the light-emitting area groups of the first light source on the left and right sides of the row where the second light source is located are adjacent, while the light-emitting areas included in the other light-emitting area groups of the first light source are not adjacent.

[0105] Please refer to Figure 18 , which shows a schematic diagram of another light source scanning method provided in some embodiments of the present disclosure. Figure 18 As shown, the light source can have Figure 15 The structure shown. Figure 18 In the example shown, the light-emitting area group of the first light source includes two light-emitting areas, which are adjacent and scanned in a column-by-column order from top to bottom; the light-emitting areas in the light-emitting area group of the second light source are not adjacent, and the light-emitting area group includes eight light-emitting areas. Figure 14 In the description of the illustrated embodiment, the light-emitting area group of the first light source and the light-emitting area group of the second light source may also include more or fewer light-emitting areas, and the arrangement manner is not limited.

[0106] In the above embodiment of non-uniform detection, motion blur may also occur when inter-group scanning is performed on adjacent areas of different light sources. The inter-group scanning method of the above embodiment can be used to reduce the probability of motion blur. For example, the scanning times of adjacent areas (luminous area groups) of the REA area and the non-REA area (e.g., the first light source and the second light source) are similar, that is, the time difference between the time windows is less than or equal to the second time threshold (referred to herein as the second time threshold to distinguish it from other time thresholds). For another example, the scanning times of adjacent areas (luminous area groups) of different REA areas (e.g., the second light source and the third light source) are similar, that is, the time difference between the time windows is less than or equal to the third time threshold (referred to herein as the third time threshold to distinguish it from other time thresholds). For example, the distance between at least one first luminous area in the first luminous area group and at least one third luminous area in the third luminous area group is less than or equal to the second distance threshold, and the time difference between the first time window of the first luminous area group and the third time window of the third luminous area group is less than or equal to the second time threshold. For another example, the distance between at least one third light-emitting area in the third light-emitting area group and at least one fourth light-emitting area in the fourth light-emitting area group is less than or equal to a third distance threshold, and the time difference between the third time window of the third light-emitting area group and the fourth time window of the fourth light-emitting area group is less than or equal to the third time threshold. The first distance threshold, the second distance threshold, and the third distance threshold can be all equal, partially equal, or all different; the first time threshold, the second time threshold, and the third time threshold can be all equal, partially equal, or all different. The first light-emitting area group, the third light-emitting area group, and the fourth light-emitting area group belong to different light sources. For example, the first light-emitting area group can belong to the first light source, the third light-emitting area group can belong to the second light source, and the fourth light-emitting area group can belong to the third light source.

[0107] A laser emitting device may include one or more light sources. When a laser emitting device includes multiple light sources, the ranging capabilities of different light sources may differ, or in other words, the maximum detection ranges of the different light sources may differ. The maximum detection range of the first light source is a first value, the maximum detection range of the second light source is a second value, and the maximum detection range of the third light source is a third value. The first, second, and third values may be at least partially different. For example, the first value may be smaller than the second value. Another example is that the first value may be smaller than the second value, and the second value may be smaller than the third value. The fields of view of different light sources may be the same or different. For example, the fields of view of different light sources may at least not completely overlap, such as not overlapping at all or partially overlapping. In another example, the field of view of one light source may be a subset of the field of view of another light source. For example, if the first light source 1510 has a larger field of view than the second light source 1520, the field of view of the second light source 1520 is a subset of the field of view of the first light source 1510. For another example, the first light source 1610 has a larger field of view than the second light source 1620 and the third light source 1630. The fields of view of the second light source 1620 and the third light source 1630 are subsets of the field of view of the first light source. The fields of view of the second light source 1620 and the third light source 1630 can be the same or different. For example, the field of view of the second light source 1620 is a subset of the field of view of the third light source 1630.

[0108] The light sources included in the laser emitting device can all adopt the above-mentioned parallel scanning method and / or inter-group scanning method. The specific implementation can refer to the description of any of the above embodiments. The time window size of the light-emitting area groups of different light sources can be the same or different. The number of light-emitting areas included in the light-emitting area groups of different light sources can be the same or different. The number of light-emitting areas scanned in the light-emitting area groups of different light sources can be the same or different, and the laser pulse intensity can be the same or different. In one implementation, to achieve a longer detection range for the REA area (e.g., the detection area corresponding to the second light source or the third light source described above), higher-intensity laser pulses and longer laser pulse intervals can be used. For example, the number of light-emitting areas in the light-emitting area group of the second light source 1520 or 1620 is greater than the number of light-emitting areas in the light-emitting area group of the first light source 1510 or 1610. In one implementation, the number of third light-emitting areas in the third light-emitting area group is greater than the number of first light-emitting areas in the first light-emitting area group. For another example, the number of light-emitting areas in the light-emitting area group of the second light source 1620 is greater than the number of light-emitting areas in the light-emitting area group of the third light source 1630. The number of light-emitting areas in the light-emitting area group of the third light source 1630 is greater than the number of light-emitting areas in the light-emitting area group of the first light source 1610. In one implementation, the third light source includes a fourth light-emitting area group, and the number of fourth light-emitting areas in the fourth light-emitting area group is greater than the number of first light-emitting areas in the first light-emitting area group and less than the number of third light-emitting areas in the third light-emitting area group.

[0109] Based on the same or similar technical concept, the embodiment of the present disclosure also provides a method for controlling light source emission, which can be executed by the above control circuit or control and processing system. Figure 19 As shown, the method includes:

[0110] S191: Generate a first control instruction;

[0111] S192: Send a first control instruction to the laser emitting device. The first control instruction can be used to control the laser emitting device's driving circuit to drive at least one light source of the laser emitting device, thereby implementing the aforementioned parallel scanning and / or inter-group scanning methods. For example, at least two light-emitting areas in a light-emitting area group of at least one light source emit laser light within a single time window. The implementation of scanning can be found in the relevant description of the aforementioned embodiment and will not be repeated here.

[0112] In some embodiments of the present disclosure, please refer to Figure 13 The first control instruction can be used to control the driving transistor E1 of the row driving circuit and the driving transistor E2 of the column driving circuit, thereby controlling the state of the corresponding trigger signal by controlling the conduction and cutoff of the driving transistors.

[0113] In some embodiments of the present disclosure, Figure 19 As shown, the above method also includes:

[0114] S193: Generate a second control instruction;

[0115] S194: Send a second control instruction to the laser receiving device. The second control instruction can be used to control the detection circuit of the laser receiving device to drive at least one detection zone of the laser receiving device. When the first control instruction controls the first light-emitting zone group of the laser emitting device to emit laser light within the first time window, the second control instruction controls the activation of at least one first detection zone of the laser receiving device within the first time window. The at least one first detection zone corresponds to the first light-emitting zone group.

[0116] Similarly, when the first control instruction controls the second light-emitting area group of the laser emitting device to emit laser light within the second time window, the second control instruction controls at least one second detection area of the laser receiving device to activate within the second time window, and the at least one second detection area corresponds to the second light-emitting area group. When the first control instruction controls the third light-emitting area group of the laser emitting device to emit laser light within the third time window, the second control instruction controls at least one third detection area of the laser receiving device to activate within the third time window, and the at least one third detection area corresponds to the third light-emitting area group. More corresponding light-emitting area groups and detection areas are similarly configured.

[0117] An embodiment of the present disclosure further provides a device for controlling light emission of a light source, comprising a unit or means for executing the steps of any of the above methods for controlling light emission of a light source.

[0118] The division of the control device's units can be a division of logical functions. In actual implementation, they can be fully or partially integrated into a single physical entity, or physically separated. The control device's functions can be implemented by a processor invoking software. For example, a system includes a processor connected to a memory storing instructions. The memory invokes the instructions stored in the memory to implement any of the above methods for controlling light source illumination. The processor can be, for example, a general-purpose processor, such as a central processing unit (CPU), and the memory can be memory within the control device or external to the control device. Alternatively, the control device's functions can be implemented in the form of hardware circuits, which can be implemented through the design of the hardware circuits. The hardware circuit can be understood as one or more processors. For example, the hardware circuit can be an application-specific integrated circuit (ASIC), which implements the functions of some or all of the above units by designing the logical relationships between the components within the circuit. For another example, the hardware circuit can be implemented using a programmable logic device (PLD), which can include a large number of logic gates. The logical relationships between the logic gates are configured using a configuration file to implement the above control device's functions. Alternatively, the above implementations can be combined, with some functions of the control device being implemented by the processor calling programs and some functions being implemented by hardware circuits. The components of the control device can be integrated together and implemented in the form of a system on chip (SOC).

[0119] For example, see Figure 20 , which is a structural diagram of a light source lighting control device provided by an embodiment of the present disclosure. The control device can be the above control circuit or control and processing system. Figure 20As shown, the light source control device 2000 includes a processor 2010 and a first interface 2020. The processor 2010 can be used to generate a first control instruction and send the first control instruction to the laser emitting device through the first interface 2020. The first control instruction can be used to control the driving circuit of the laser emitting device to drive at least one light source of the laser emitting device. The control device 2000 includes a second interface 2030. The processor 2010 can be used to generate a second control instruction and send the second control instruction to the laser receiving device through the second interface 2030. The second control instruction can be used to control the detection circuit of the laser receiving device to drive at least one detection zone of the laser receiving device. For example, when the first control instruction controls the first light-emitting zone group of the laser receiving device to emit laser light within a first time window, the second control instruction controls at least one first detection zone of the laser receiving device to be activated within the first time window, and the at least one first detection zone corresponds to the first light-emitting zone group. The laser emitting device and the laser receiving device can refer to the description in the above embodiments and will not be repeated here.

[0120] In the embodiments of the present disclosure, the processor may be a circuit having a signal processing capability. For example, the processor may be a circuit having the capability to read and execute instructions, such as a CPU, a microprocessor, a graphics processing unit (GPU), or a digital signal processor (DSP). For another example, the processor may implement its functions through the logical relationship of a hardware circuit, and the logical relationship of the hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an ASIC or PLD, such as a field programmable gate array (FPGA). In a reconfigurable hardware circuit, the processor loads a configuration document to implement the process of configuring the hardware circuit, which may be understood as the process of the processor loading instructions to implement its functions.

[0121] In addition, an embodiment of the present disclosure further provides a computer-readable storage medium, including instructions stored thereon, wherein when the instructions are called by a processor, any one of the control methods in the above embodiments is executed. For example, the computer-readable storage medium can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, an optical disc storage (including a compact disc, a laser disc, an optical disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0122] The embodiments of the present disclosure further provide a computer program (or computer program product), comprising instructions, which, when called by a processor, execute any one of the control methods in the above embodiments.

[0123] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments. In addition, the above embodiments can be freely combined as needed.

Claims

1. A laser emitting device, characterized in that: include: a first light source and a driving circuit; The first light source includes a first light emitting area group, and the first light emitting area group includes at least two first light emitting areas; The driving circuit is used to drive the first light source, wherein the driving circuit drives at least two first light-emitting areas of the first light-emitting area group to emit laser light within a first time window.

2. The laser emitting device according to claim 1, characterized in that: The driving circuit is used to drive the at least two first light-emitting areas to emit lasers in different time sequences within the first time window.

3. The laser emitting device according to claim 1 or 2, characterized in that: The first light source includes a first light emitting array, in which the at least two first light emitting areas are not adjacent to each other.

4. The laser emitting device according to any one of claims 1 to 3, characterized in that: The first light source includes a first light emitting array, and the at least two first light emitting areas are located in the same row or column of the first light emitting array.

5. The laser emitting device according to any one of claims 1 to 4, characterized in that: The first light source further includes a second light emitting area group, and the second light emitting area group includes at least two second light emitting areas; The driving circuit is further configured to drive at least two second light-emitting areas in the second light-emitting area group to emit laser light within a second time window.

6. The laser emitting device according to claim 5, characterized in that: The driving circuit is used to drive the at least two second light-emitting areas to emit laser light in different time sequences within the second time window.

7. The laser emitting device according to claim 5 or 6, characterized in that: A time difference between the first time window and the second time window is less than or equal to a first time threshold, and a spacing distance between at least one first light-emitting area in the first light-emitting area group and at least one second light-emitting area in the second light-emitting area group is less than or equal to a first distance threshold.

8. The laser emitting device according to any one of claims 1 to 7, characterized in that: The laser emitting device further includes a second light source, and the maximum detection distance of the second light source is greater than the maximum detection distance of the first light source.

9. The laser emitting device according to claim 8, characterized in that: The second light source includes a third light emitting area group, and the third light emitting area group includes at least two third light emitting areas; The driving circuit is further configured to drive the second light source, wherein the driving circuit drives at least two third light-emitting areas in the third light-emitting area group to emit laser light within a third time window.

10. The laser emitting device according to claim 9, characterized in that: The driving circuit is used to drive the at least two third light-emitting areas to emit lasers in different time sequences within the third time window.

11. The laser emitting device according to claim 9 or 10, characterized in that: The number of the third light-emitting areas in the third light-emitting area group is greater than the number of the first light-emitting areas in the first light-emitting area group.

12. The laser emitting device according to any one of claims 9 to 11, characterized in that: A time difference between the first time window and the third time window is less than or equal to a second time threshold, and a spacing distance between at least one first light-emitting area in the first light-emitting area group and at least one third light-emitting area in the third light-emitting area group is less than or equal to a second distance threshold.

13. The laser emitting device according to any one of claims 1 to 12, characterized in that: The driving circuit drives the at least two first light-emitting areas to alternately emit laser light within the first time window; or, The driving circuit drives the at least two first light-emitting areas to randomly emit laser light within the first time window.

14. A method for controlling light emission of a light source, characterized in that: include: generating a first control instruction; The first control instruction is sent to the laser emitting device according to any one of claims 1 to 13, wherein the first control instruction is used to control the driving circuit of the laser emitting device to drive at least one light source of the laser emitting device.

15. The control method according to claim 14, characterized in that: Also includes: generating a second control instruction; The second control instruction is sent to the laser receiving device, wherein the second control instruction is used to control the detection circuit of the laser receiving device to drive at least one detection area of the laser receiving device, wherein when the first control instruction controls the first light-emitting area group of the laser receiving device to emit laser within a first time window, the second control instruction controls at least one first detection area of the laser receiving device to start within the first time window, and the at least one first detection area corresponds to the first light-emitting area group.

16. A light source control device, characterized in that: include: A processor and a first interface, the processor is used to generate a first control instruction, and send the first control instruction to the laser emitting device according to any one of claims 1 to 13 through the first interface, wherein the first control instruction is used to control the driving circuit of the laser emitting device to drive at least one light source of the laser emitting device.

17. The control device according to claim 16, characterized in that Also includes: Second interface; The processor is also used to generate a second control instruction and send the second control instruction to the laser receiving device through the second interface, wherein the second control instruction is used to control the detection circuit of the laser receiving device to drive at least one detection area of the laser receiving device, wherein when the first control instruction controls the first light-emitting area group of the laser receiving device to emit laser within the first time window, the second control instruction controls at least one first detection area of the laser receiving device to start within the first time window, and the at least one first detection area corresponds to the first light-emitting area group.

18. An optical detection device, characterized in that: include: A laser emitting system, comprising a laser emitting device according to any one of claims 1 to 13, for emitting laser light; A laser receiving system, configured to receive an echo of the laser reflected by an object and convert the echo into an echo signal; A control and processing system is used to determine information about the object based on the echo signal.

19. A terminal device, characterized in that: Comprising the optical detection device as claimed in claim 16.

20. A computer program product comprising instructions, wherein when the instructions are executed by a processor, the control method according to claim 14 is performed.

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