Emission system and related apparatus

Abstract

An emission system and a related apparatus. The emission system (40) comprises at least two first laser emission channels (401), a first driving unit (400) and a first power supply (V1), wherein the at least two first laser emission channels (401) are connected in parallel, with one side of the at least two first laser emission channels (401) being connected to the first power supply (V1), and the other side thereof being connected to the first driving unit (400). Each first laser emission channel (401) comprises a first laser unit (401a), a second laser unit (401b), a first energy storage unit (C1) and a first switch (K1), wherein the first energy storage unit (C1) and the second laser unit (401b) are connected in parallel; the first energy storage unit (C1) and one side of the second laser unit (401b) are connected to the first power supply (V1) by means of the first switch (K1), and the other side of the second laser unit (401b) is connected to the first laser unit (401a); the first laser unit (401a) is connected to the first driving unit (400); and the first driving unit (400) is used for driving the first laser unit (401a) and the second laser unit (401b) to emit light beams.

Description

Launch system and related devices Technical Field

[0001] This application relates to the field of lidar technology, and in particular to a transmitting system and related devices. Background Technology

[0002] With the development of information technology and computer vision, detection technology has made rapid progress, and various detection devices have brought great convenience to people's lives and travel. Detection devices can be regarded as the "eyes" of the environment, including visual sensors such as cameras and radar sensors such as millimeter-wave radar, lidar, and ultrasonic radar.

[0003] Among them, LiDAR (light detection and ranging) has the advantages of high resolution, good detection performance and strong concealment. It plays an important role in the process of equipment sensing the environment. In particular, it has been widely used in the field of intelligent driving, which helps the further development of intelligent driving technology.

[0004] The emission power and driving efficiency of a laser are crucial to the detection performance of lidar. Therefore, improving the emission power and driving efficiency of lasers to enhance the detection performance of lidar is a hot research topic among those skilled in the art.

[0005] Summary of the Invention

[0006] This application provides a transmitting system and related apparatus that can improve the transmitting power and driving efficiency of a laser.

[0007] In a first aspect, embodiments of this application provide a transmitting system, which includes at least two first laser emitting channels, a first driving unit, and a first power supply. The at least two first laser emitting channels are connected in parallel, with one side of each channel connected to the first power supply and the other side connected to the first driving unit. Each first laser emitting channel includes:

[0008] First laser unit, second laser unit, first energy storage unit, first switch;

[0009] The first energy storage unit and the second laser unit are connected in parallel. One side of the first energy storage unit and the second laser unit are connected to the first power supply through the first switch. The other side of the second laser unit is connected to the first laser unit. The first laser unit is connected to the first driving unit.

[0010] The first driving unit is used to drive the first laser unit and the second laser unit to emit beams.

[0011] This application provides a transmitting system comprising at least two first laser emitting channels, a first driving unit, and a first power supply. Each first laser emitting channel includes a first laser unit, a second laser unit, a first energy storage unit, and a first switch. Since a typical laser emitting channel includes only one laser unit, increasing the laser's emitting power usually requires increasing the current in the laser driving circuit. However, as the driving current increases, the capacitance and the loop impedance from the capacitor to the laser also increase losses, leading to a decrease in driving efficiency. To simultaneously improve both the laser's emitting power and driving efficiency, the transmitting system in this application equips the first laser emitting channel with two laser units (i.e., a first laser unit and a second laser unit), and the first driving unit drives the first and second laser units to emit beams. It is understood that, compared to a typical laser emitting channel including only one laser unit, the first laser emitting channel in this application includes two laser units, which is equivalent to adding an extra laser unit.

[0012] In one possible driving method, the first power supply can increase the output voltage so that the driving current remains unchanged even when a new laser unit is added. In this case, the first driving unit drives the two laser units in the first laser emission channel to emit beams, which can theoretically increase the emission power. Since the driving current remains unchanged, the capacitor and the loop impedance caused by the trace from the capacitor to the laser also remain unchanged, which can ensure that the driving efficiency remains unchanged.

[0013] In another possible driving method, the first power supply keeps the output voltage constant, so that the driving current is reduced when a new laser unit is added. In this case, the loop impedance caused by the capacitor and the trace from the capacitor to the laser will theoretically also reduce the loss, thereby improving the driving efficiency. Furthermore, since the output voltage of the first power supply is constant, the first driving unit drives the two laser units in the first laser emission channel to emit beams, and the overall emission power of the two laser units will theoretically remain unchanged, which can ensure that the emission power remains constant.

[0014] In another possible driving method, which can be considered as a situation between the two driving methods mentioned above, the first power supply can increase the output voltage by a certain amount, so that when a laser unit is added, the driving current is reduced by a certain amount. At this time, the loop impedance caused by the capacitor and the trace from the capacitor to the laser will theoretically also reduce the loss, thereby improving the driving efficiency to a certain extent. Furthermore, since the output voltage of the first power supply is increased, the first driving unit drives the two laser units in the first laser emission channel to emit beams, which can theoretically increase the emission power to a certain extent, thereby achieving a simultaneous increase in the emission power and driving efficiency of the laser.

[0015] The above analysis shows that, compared with a typical laser emission channel that includes only one laser unit, the emission system in this embodiment is equipped with two laser units for the first laser emission channel, which can simultaneously improve the emission power and driving efficiency of the laser.

[0016] Optionally, the transmitting system in this embodiment may further equip the first laser transmitting channel with two or more arbitrary numbers of laser units. These arbitrary numbers of laser units are connected in series, with one side connected to the first driving unit and the other side connected in parallel to the first energy storage unit, and connected to the first power supply via a first switch. It is understood that, compared to a typical laser transmitting channel that includes only one laser unit, the transmitting system in this embodiment equips the first laser transmitting channel with two or more arbitrary numbers of laser units, which can simultaneously improve the laser's transmitting power and driving efficiency. The specific principle can be found in the above description and will not be repeated here.

[0017] In one possible implementation, the first laser unit includes a laser, the anode of which is connected to the second laser unit, and the cathode of which is connected to the first driving unit;

[0018] Alternatively, the first laser unit may include multiple lasers connected in parallel, with the anodes of the multiple lasers connected to the second laser unit and the cathodes of the multiple lasers connected to the first driving unit.

[0019] In this embodiment, the first laser unit may include one or more lasers. When it includes one laser, the anode of the laser is connected to the second laser unit, and the cathode of the laser is connected to the first driving unit. When it includes multiple lasers, the multiple lasers are connected in parallel, the anodes of the multiple lasers are connected to the second laser unit, and the cathodes of the multiple lasers are connected to the first driving unit.

[0020] Alternatively, the emission power of the laser can be increased by increasing the number of current-limiting optical apertures (OAs) in the first laser unit. Increasing the number of OAs can be regarded as setting multiple lasers in parallel in the first laser unit, and the technical effect achieved is the same as that achieved by setting multiple lasers in parallel in the first laser unit.

[0021] In one possible implementation, the second laser unit includes a laser, the anode of which is connected to the first switch, and the cathode of which is connected to the first laser unit;

[0022] Alternatively, the second laser unit may include multiple lasers connected in parallel, with the anodes of the multiple lasers connected to the first switch and the cathodes of the multiple lasers connected to the first laser unit.

[0023] In one possible implementation, each of the at least two first laser emission channels includes the same first laser unit and the same second laser unit.

[0024] In this embodiment, each first laser emission channel in the emission system includes the same first laser unit and second laser unit. Compared with a general laser emission channel that includes only one laser unit, the emission system in this embodiment equips each first laser emission channel with two laser units, which can simultaneously improve the emission power and driving efficiency of the laser.

[0025] In one possible implementation, the first laser unit is disposed on a first chip, and the second laser unit is disposed on a second chip, with the first chip and the second chip connected by a metal wire; or...

[0026] The first laser unit and the second laser unit are disposed on the third chip, and the first laser unit and the second laser unit are connected through interconnect vias.

[0027] In this embodiment, when the two laser units in the first laser emission channel are respectively disposed on two different chips, the two chips can be connected by metal wires, for example, by bonding wires. When the two laser units in the first laser emission channel are disposed on the same chip, the two laser units can be connected by interconnect vias, for example, by on-chip interconnect technologies such as vias.

[0028] In one possible implementation, a plurality of first laser units in the emission system are disposed on a chip, the anodes of the plurality of first laser units are isolated from each other, and the cathodes of the plurality of first laser units are interconnected within the chip; or,

[0029] The multiple first laser units in the emission system are disposed on the chip. The anodes of the multiple first laser units are isolated from each other, the cathodes of the multiple first laser units are isolated from each other within the chip, and the cathodes of the multiple first laser units are interconnected through an external printed circuit board (PCB).

[0030] In this embodiment, the anodes of the multiple first laser units in the transmitting system are isolated from each other, while the cathodes are interconnected within the chip. In this case, the multiple first laser units can form an anode-isolated, common-cathode multi-channel vertical-cavity surface-emitting laser (VCSEL) array. Alternatively, the anodes of the multiple first laser units in the transmitting system are isolated from each other, while the cathodes are isolated within the chip. In this case, the multiple first laser units can form an anode-isolated, cathode-isolated multi-channel VCSEL array, and the cathodes are interconnected through an external printed circuit board (PCB).

[0031] In one possible implementation, the emission system further includes at least one second laser emission channel; the second laser emission channel includes:

[0032] Third laser unit, second energy storage unit, second switch;

[0033] The first power supply is connected to the third laser unit and the second energy storage unit via the second switch. The third laser unit and the second energy storage unit are connected in parallel. The first driving unit is connected to the third laser unit.

[0034] The first driving unit is also used to drive the third laser unit to emit a beam.

[0035] In this embodiment, the transmitting system further includes at least one second laser transmitting channel, which includes a third laser unit, a second energy storage unit, and a second switch. It is understood that the transmitting system in this embodiment equips the laser transmitting channel with one or more laser units. By equipping any one or more laser transmitting channels with two or more laser units, compared to a typical laser transmitting channel including only one laser unit, it is possible to simultaneously improve the laser's transmitting power and driving efficiency.

[0036] In one possible implementation, the first driving unit includes a driver, which is disposed at the beginning, end, or middle of the laser emission channel in the emission system along a first direction, wherein the first direction is the arrangement direction of the laser emission channel in the emission system.

[0037] In this embodiment, a possible specific implementation of the driver arrangement is provided. Specifically, when the driving unit includes a driver, the driver can be disposed along the first direction at the beginning or end of the laser emission channel in the emission system, which is beneficial for the driver's heat dissipation. Alternatively, the driver can also be disposed along the first direction in the middle of the laser emission channel in the emission system. In this case, the overall difference in emission power among the multiple lasers in the laser emission channel is small. Therefore, this arrangement can improve the consistency of emission power among the multiple lasers in the laser emission channel from the perspective of positional layout.

[0038] Optionally, the driver may also be disposed at other locations in the laser emission channel of the emission system along the first direction, and the embodiments of this application do not limit this.

[0039] In one possible implementation, the driver is located on the reverse side of the circuit board carrying the laser emission channel in the emission system.

[0040] In this embodiment, the driver in the above-mentioned transmission system is located on the reverse side of the circuit board (e.g., PCB) that carries the laser emission channel in the transmission system. This is beneficial for optimizing the wiring design between various modules in the transmission system and improving space utilization.

[0041] In one possible implementation, the driving unit includes at least two drivers, which are respectively disposed at both ends of the laser emission channel in the emission system along a first direction, wherein the first direction is the arrangement direction of the laser emission channel in the emission system.

[0042] In this embodiment, a possible specific implementation of the driver arrangement is provided. Specifically, when the driving unit includes at least two drivers, the at least two drivers can be respectively arranged at both ends of the laser emission channel in the emission system along a first direction, which is beneficial for the heat dissipation of the drivers. At this time, the overall difference in emission power of the multiple lasers in the laser emission channel is small. Therefore, this arrangement can improve the consistency of emission power of the multiple lasers in the laser emission channel from the perspective of position layout.

[0043] Optionally, the at least two drivers may also be disposed in the middle or other positions of the laser emission channel in the emission system along the first direction, and the embodiments of this application do not limit this.

[0044] In one possible implementation, the at least two drives are arranged in a mirror image.

[0045] In this embodiment, a possible specific implementation of the driver arrangement is provided, specifically, at least two drivers in the launch system are arranged in a mirror image, which is beneficial to optimize the wiring design between various modules in the launch system and improve space utilization.

[0046] In one possible implementation, the laser emission channel in the emission system is disposed on a printed circuit board (PCB).

[0047] In this embodiment, the laser emission channel in the above-described emission system is disposed on the PCB. Furthermore, the laser emission channel in the above-described emission system can be disposed on the front side or the back side of the PCB; this application does not impose any limitation on this.

[0048] Secondly, embodiments of this application provide a chip that includes the transmission system described in the first aspect or any possible implementation of the first aspect.

[0049] Thirdly, embodiments of this application provide a radar or radar system that includes the transmitting system described in the first aspect or any possible implementation of the first aspect, or includes the chip described in the second aspect.

[0050] In one possible implementation, the radar includes, but is not limited to, lidar.

[0051] In one possible implementation, there may be a smart sensor that integrates multiple sensors. In the case where the smart sensor includes, but is not limited to, laser detection functions, the smart sensor may also be called a radar or radar system.

[0052] Fourthly, embodiments of this application provide a terminal device, which includes the transmitting system described in the first aspect or any possible implementation of the first aspect, or includes the chip described in the second aspect, or includes the radar or radar system described in the third aspect.

[0053] Fifthly, embodiments of this application provide a vehicle terminal, which includes the transmitting system described in the first aspect or any possible implementation of the first aspect, or includes the chip described in the second aspect, or includes the radar or radar system described in the third aspect, or includes the terminal device described in the fourth aspect.

[0054] Optionally, the vehicle end can be a means of transportation, such as a car, truck, aircraft, drone, slow transport vehicle, spacecraft, or ship, or any other possible means of transportation used in any scenario. This application embodiment does not limit this. Attached Figure Description

[0055] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1A is a schematic diagram of an application scenario of radar provided in an embodiment of this application;

[0057] Figure 1B is a schematic diagram of an application scenario of radar provided in an embodiment of this application;

[0058] Figure 2A is a schematic diagram of the architecture of a radar provided in an embodiment of this application;

[0059] Figure 2B is a schematic diagram of the architecture of a radar provided in an embodiment of this application;

[0060] Figure 3 is a schematic diagram of a radar driving circuit provided in an embodiment of this application;

[0061] Figure 4 is a schematic diagram of a launching system provided in an embodiment of this application;

[0062] Figure 5 is a schematic diagram of another launching system provided in an embodiment of this application;

[0063] Figure 6A is a schematic diagram of a laser unit configuration provided in an embodiment of this application;

[0064] Figure 6B is a schematic diagram of another laser unit configuration provided in an embodiment of this application;

[0065] Figure 7A is a schematic diagram of a laser unit configuration provided in an embodiment of this application;

[0066] Figure 7B is a schematic diagram of another laser unit configuration provided in an embodiment of this application;

[0067] Figure 8 is a schematic diagram of another launching system provided in an embodiment of this application;

[0068] Figure 9 is a schematic diagram of a laser unit configuration provided in an embodiment of this application;

[0069] Figure 10 is a schematic diagram of another laser unit configuration provided in an embodiment of this application. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described below with reference to the accompanying drawings.

[0071] The terms "first" and "second," etc., used in the specification, claims, and drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0072] The term "embodiment" as used herein means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that, unless otherwise specified or logically conflicting, the terminology and / or descriptions between the various embodiments of this application are consistent and can be mutually referenced, and technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0073] It should be understood that in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the relationship between related objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0074] As described in the background section, the emission power and driving efficiency of a laser are crucial to the detection performance of a lidar system. To improve the detection performance of a lidar system, it is necessary to increase the emission power and driving efficiency of the laser. This application provides a emission system and related apparatus, relating to the field of lidar technology, which can improve the emission power and driving efficiency of the laser, thereby enhancing the detection performance of the lidar system.

[0075] To more clearly describe the solution in this application, some possible application scenarios for lidar will be introduced below.

[0076] Please refer to Figures 1A and 1B, which are schematic diagrams of radar application scenarios provided in the embodiments of this application.

[0077] As shown in Figures 1A and 1B, this exemplary application scenario takes the installation of a lidar on a vehicle as an example.

[0078] The vehicle can be, for example, an autonomous vehicle, an intelligent vehicle, an electric vehicle, or a digital car. LiDAR can be deployed at various locations on the vehicle (see Figure 1B). For example, LiDAR can be deployed in any one or more of the four directions (front, rear, left, and right) to capture information about the vehicle's surrounding environment. Figure 1A shows an example of LiDAR deployed at the front of the vehicle. The LiDAR can sense the fan-shaped area indicated by the dashed box in Figure 1A; this fan-shaped area can be called the LiDAR's detection area (or field of view).

[0079] In one possible implementation, LiDAR can acquire the vehicle's latitude, longitude, speed, and orientation in real time or periodically, or the associated information (e.g., target distance, target speed, target attitude, or target grayscale image) of targets within a certain range (e.g., other surrounding vehicles). The LiDAR or vehicle can then determine its position and / or plan its path based on this associated information. For example, latitude and longitude can be used to determine the vehicle's position, speed and orientation can be used to determine the vehicle's future direction and destination, or the distance to surrounding objects can be used to determine the number and density of obstacles around the vehicle. Further, optionally, it can be combined with the functions of an advanced driving assistance system (ADAS) to achieve assisted driving or autonomous driving. It should be understood that the principle of LiDAR detecting target association information is as follows: the LiDAR emits detection light in a certain direction; if a target exists within the LiDAR's detection area, the target can reflect the received detection light back to the LiDAR (the reflected detection light can be called an echo signal), and the LiDAR then determines the target's association information based on the echo signal.

[0080] It should be noted that the above application scenarios are merely examples. The lidar provided in this application (including the optical waveguide component provided in this application) can also be applied to a variety of other possible scenarios, and is not limited to the scenarios exemplified above. For example, the lidar can also be installed on a drone as an airborne radar. Another example is that the lidar can be installed on a roadside unit (RSU) as a roadside traffic lidar, enabling intelligent vehicle-road cooperative communication. Yet another example is that the lidar can be installed on an automated guided vehicle (AGV), where AGV refers to a transport vehicle equipped with electromagnetic or optical automatic navigation devices, capable of traveling along a prescribed navigation path, and possessing safety protection and various transfer functions. These are just a few examples. It should be understood that the application scenarios described in this application are for the purpose of more clearly illustrating the technical solutions of this application and do not constitute a limitation on the technical solutions provided in this application. Those skilled in the art will understand that with the emergence of new application scenarios, the technical solutions provided in this application are equally applicable to similar technical problems.

[0081] Based on the above, the above application scenarios can be applied to fields such as unmanned driving, autonomous driving, assisted driving, intelligent driving, connected vehicles, security monitoring, remote interaction, surveying and mapping, or artificial intelligence.

[0082] The following section, using Figures 2A and 2B as examples, introduces some relevant concepts of lidar.

[0083] LiDAR, also known as optical radar, is short for light detection and ranging system. It can also be called Laser Radar or LADAR (laser detection and ranging).

[0084] LiDAR (Light Detection and Ranging) uses light as its detection medium. It utilizes the emission and reception of laser light to detect targets, such as for ranging, velocity measurement, or azimuth measurement. LiDAR can measure target distance based on the laser's time-of-flight (TOF), which is the time difference between transmission and reception. Alternatively, it can measure target distance based on the phase difference between the emitted and received echo signals of the same laser. The greatest advantage of LiDAR lies in its ability to create clear three-dimensional (3D) images of targets using Doppler imaging technology. LiDAR collects information such as the 3D coordinates, reflectivity, and texture of numerous dense points on the target surface through laser emission and reception. Based on this information, it obtains a 3D model of the target, builds a 3D point cloud map, and creates an environmental map to achieve environmental perception. Compared to traditional passive imaging technologies such as visible light and infrared, lidar imaging technology overturns the traditional two-dimensional projection imaging mode. It can collect the depth information of the target surface, obtain relatively complete spatial information of the target, and reconstruct the three-dimensional surface of the target through data processing to obtain a three-dimensional graphic that better reflects the geometric shape of the target. At the same time, it can also obtain rich feature information such as the reflectivity of the target surface and the speed of movement, providing sufficient information support for data processing such as target detection, identification, and tracking, and reducing the difficulty of algorithms.

[0085] Please refer to Figure 2A, which is a schematic diagram of the architecture of a radar provided in an embodiment of this application.

[0086] As shown in Figure 2A, the lidar mainly includes a laser emitting part (or system) 100, a laser receiving part (or system) 200, and a signal processing part (or system) 300.

[0087] The laser emitting section 100 includes an excitation source (or laser driver), a laser, and an emitting optical system. The excitation source drives the laser to emit a laser beam (or laser pulse), which is then emitted outward through the emitting optical system. The laser receiving section 200 includes a receiving optical system and a detector. When the laser beam emitted from the lidar encounters a target object, it interacts with the object to form a reflected / scattered echo beam. This echo beam is collected by the receiving optical system and received by the detector, which converts the optical signal into an electrical signal. The electrical signal is then processed by an analog front-end and transmitted to the signal processing section 300. The signal processing section 300 processes the received signal to obtain information such as the target object's distance, velocity, and azimuth. Furthermore, it can acquire information such as the target's surface morphology and physical properties to build an object model. The detector is typically a photodetector, which converts the received light signal into an electrical signal. This electrical signal is usually an analog signal, while the signal processing unit 300 is typically used to process digital signals, such as a digital signal processor (DSP). Therefore, the analog electrical signal is converted into a digital signal by an analog-to-digital converter (ADC) and provided to the signal processing unit 300. Furthermore, the electrical signal can be amplified, and the amplified electrical signal is converted back to a digital signal by the ADC before being provided to the signal processing unit 300. The signal processing unit 300 includes signal processing circuitry for processing the digital signal to obtain information such as the target object's distance, velocity, and azimuth angle, and further constructs an object model. The lidar also includes control circuitry, such as a control unit for controlling the excitation source and a control unit for controlling the scanning drive circuit. These two control units can be integrated together or set up independently. Furthermore, the signal processing circuitry and the control circuitry can also be integrated together or set up independently.

[0088] In another implementation, the laser emitting section 100 may also include a laser modulator and a beam controller. The laser beam emitted by the laser passes through the beam controller, which, under the control of the laser modulator, controls the direction and number of lines of the emitted laser beam. The laser beam emitted from the beam controller is emitted outward through the emitting optical system.

[0089] In addition, the lidar may also include a scanning section (or system) 400. The laser beam emitted by the laser is scanned across a plane by the scanning section 400 to generate real-time planar image information. The scanning section 400 mainly includes a scanning mechanism and a scanning drive circuit. The scanning drive circuit drives the scanning mechanism to operate, and the laser beam, under the action of the scanning mechanism, transforms from a "line" to a "plane".

[0090] Taking the electronic scanning method as an example, please refer to Figure 2B. Figure 2B is a schematic diagram of the architecture of a radar provided in an embodiment of this application.

[0091] As shown in Figure 2B, this is a scanning method using an electrical scanning 1D laser array. This 1D laser array can also be called a 1D solid-state lidar. The laser structures in this 1D laser array include, but are not limited to, vertical cavity surface emitting lasers (VCSELs) and photonic crystal surface emitting lasers (PCSELs).

[0092] In 1D or 2D solid-state LiDAR, the common driving method is to select the laser emission path on the high-level side and drive the laser emission on the low-level side. This driving method has a low cost.

[0093] For details, please refer to Figure 3, which is a schematic diagram of a radar driving circuit provided in an embodiment of this application.

[0094] As shown in Figure 3, the driving circuit includes, but is not limited to: N lasers, N capacitors, N switches, two drivers, and a power supply. Here, N is an integer greater than or equal to 2. The power supply is connected to the N lasers and N capacitors respectively through the N switches. The N capacitors are connected in parallel with the N lasers in a one-to-one correspondence. The two drivers are respectively located at the beginning and end of the laser array composed of N lasers, and are connected to the lasers at the beginning and end, respectively. When the switches are closed, the power supply charges the N capacitors, and the N capacitors store a certain amount of charge. After the switches are opened, even without power supply charging, the N capacitors can still power the N lasers, which then emit laser light under the drive of the two drivers.

[0095] As shown in Figure 3, each of the N laser emission channels contains only one laser. To increase the emission power of the N laser emission channels, it is usually necessary to increase the current of the drive circuit. However, as the drive current increases, the capacitance and the loop impedance from the capacitor to the laser also increase, leading to losses and a decrease in drive efficiency. Therefore, how to simultaneously improve the laser emission power and drive efficiency to enhance the detection performance of the lidar has become a pressing technical problem.

[0096] In view of this, this application provides a transmitting system and related devices, relating to the field of lidar technology, which can improve the transmitting power and driving efficiency of the laser and improve the detection performance of lidar.

[0097] The launch system and related devices provided in this application will now be described in conjunction with the accompanying drawings.

[0098] Please refer to Figure 4, which is a schematic diagram of the structure of a launching system provided in an embodiment of this application.

[0099] As shown in Figure 4, the launch system 40 includes, but is not limited to:

[0100] A first power supply V1, a first driving unit 400, and at least two first laser emission channels 401.

[0101] Among them, at least two first laser emission channels 401 are connected in parallel, and one side of the at least two first laser emission channels 401 is connected to the first power supply V1, and the other side is connected to the first driving unit 400.

[0102] The aforementioned first laser emission channel 401 includes, but is not limited to:

[0103] First laser unit 401a, second laser unit 401b, first energy storage unit C1, first switch K1.

[0104] The first energy storage unit C1 and the second laser unit 401b are connected in parallel. One side of the first energy storage unit C1 and the second laser unit 401b are connected to the first power supply V1 through the first switch K1. The other side of the second laser unit 401b is connected to the first laser unit 401a. The first laser unit 401a is connected to the first driving unit 400.

[0105] The first driving unit 400 is used to drive the first laser unit 401a and the second laser unit 401b to emit light beams.

[0106] As shown in Figure 4, when the first switch K1 is closed, the first power supply V1 charges the first energy storage unit C1, and the first energy storage unit C1 stores a certain amount of electricity. After the first switch K1 is opened, even without charging by the first power supply V1, the first energy storage unit C1 can still supply power to the first laser unit 401a and the second laser unit 401b, and the first laser unit 401a and the second laser unit 401b emit lasers under the drive of the first driving unit 400.

[0107] It is understood that Figure 4 shows two first laser emission channels 401. In fact, the emission system 40 may include two or more of any number of first laser emission channels 401. This application embodiment does not limit this, nor should Figure 4 constitute a limitation on the embodiments of this application.

[0108] Since a typical laser emission channel includes only one laser unit, increasing the current in the laser drive circuit is usually necessary to improve the laser's emission power. However, as the drive current increases, the capacitance and the loop impedance from the capacitor to the laser also increase, leading to losses and a decrease in drive efficiency. To simultaneously improve both the laser's emission power and drive efficiency, the emission system 40 in this embodiment equips the first laser emission channel 401 with two laser units (i.e., the first laser unit 401a and the second laser unit 401b), and the first drive unit 400 drives the first laser unit 401a and the second laser unit 401b to emit beams.

[0109] It is understood that, compared to a typical laser emission channel that includes only one laser unit, the first laser emission channel 401 in the emission system 40 of this application embodiment includes two laser units, which is equivalent to adding a new laser unit. In this case, the first laser unit 401a and the second laser unit 401b can emit beams through the following driving method:

[0110] Driver Method 1:

[0111] The first power supply V1 can increase the output voltage, so that even when a new laser unit is added (compared to the first laser emission channel 401 having only one first laser unit 401a or one second laser unit 401b), the driving current remains unchanged. At this time, the first driving unit 400 drives the two laser units (401a and 401b) in the first laser emission channel 401 to emit beams, which theoretically can increase the emission power. Furthermore, since the driving current remains unchanged, the capacitor C1 and the loop impedance caused by the trace from capacitor C1 to the laser also remain unchanged, which can ensure that the driving efficiency remains unchanged.

[0112] Drive method two:

[0113] The first power supply V1 maintains a constant output voltage, which reduces the driving current when an additional laser unit is added (compared to the first laser emission channel 401 which only includes one first laser unit 401a or one second laser unit 401b). In this case, the loop impedance of capacitor C1 and the trace from capacitor C1 to the laser will theoretically also reduce losses, thereby improving driving efficiency. Furthermore, since the output voltage of the first power supply V1 remains unchanged, the first driving unit 400 drives the two laser units (401a and 401b) in the first laser emission channel 401 to emit beams, and the overall emission power of the two laser units will theoretically remain unchanged, ensuring that the emission power remains constant.

[0114] Driving method three:

[0115] This third driving method can be considered as a situation between the first and second driving methods. The first power supply V1 can increase the output voltage to a certain extent, so that when a new laser unit is added (compared to the first laser emission channel 401 which only includes one first laser unit 401a or one second laser unit 401b), the driving current is reduced to a certain extent. At this time, the loop impedance of capacitor C1 and the trace from capacitor C1 to the laser will theoretically also reduce the loss, thereby improving the driving efficiency to a certain extent. Furthermore, due to the increase in the output voltage of the first power supply V1, the first driving unit 400 drives the two laser units (401a and 401b) in the first laser emission channel 401 to emit beams, which can theoretically increase the emission power to a certain extent, thereby achieving a simultaneous increase in the emission power and driving efficiency of the laser.

[0116] Based on the above analysis, it can be concluded that, compared with a general laser emission channel that only includes one laser unit, the emission system 40 in this embodiment of the application is equipped with two laser units (401a and 401b) for the first laser emission channel 401, which can simultaneously improve the emission power and driving efficiency of the laser, thereby improving the detection performance of the lidar.

[0117] It should be understood that the above-described driving methods one to three are merely examples of several possible embodiments for driving the first laser unit 401a and the second laser unit 401b to emit beams, and should not be construed as limiting the embodiments of this application.

[0118] It should be understood that any new embodiments obtained by reasonable modifications or additions to the above-described driving methods one to three are all within the protection scope of the embodiments of this application.

[0119] Optionally, the emitting system 40 in this embodiment may also be equipped with two or more laser units for the first laser emitting channel 401. The laser units are connected in series, one side of which is connected to the first driving unit 400, and the other side is connected in parallel with the first energy storage unit C1, and connected to the first power supply V1 through the first switch K1.

[0120] For example, the first laser emission channel 401 in the emission system 40 includes, but is not limited to:

[0121] First laser unit 401a, second laser unit 401b, third laser unit 401c, first energy storage unit C1, and first switch K1.

[0122] The first energy storage unit C1 and the third laser unit 401c are connected in parallel. One side of the first energy storage unit C1 and the third laser unit 401c is connected to the first power supply V1 through the first switch K1. The other side of the third laser unit 401c is connected to the second laser unit 401b. The second laser unit 401b is connected to the first laser unit 401a. The first laser unit 401a is connected to the first driving unit 400.

[0123] It is understood that, compared with a general laser emission channel that includes only one laser unit, the emission system 40 in this embodiment of the application is equipped with two or more laser units for the first laser emission channel 401, which can simultaneously improve the emission power and driving efficiency of the laser. The specific principle can be found in the above description, and will not be repeated here.

[0124] In one possible embodiment, the first laser unit 401a described above may include one or more lasers.

[0125] Scenario 1:

[0126] When the first laser unit 401a includes a laser, as shown in Figure 4, the anode of the laser is connected to the second laser unit 401b, and the cathode of the laser is connected to the first driving unit 400.

[0127] Scenario 2:

[0128] When the first laser unit 401a includes multiple lasers, please refer to FIG5, which is a schematic diagram of another emission system provided in the embodiment of this application.

[0129] As shown in Figure 5, multiple lasers in the first laser unit 401a are connected in parallel. The anodes of these multiple lasers are connected to the second laser unit 401b, and the cathodes of these multiple lasers are connected to the first driving unit 400.

[0130] Alternatively, the emission power of the laser can be increased by increasing the number of current-limiting optical apertures (OA) in the first laser unit 401a. Increasing the number of OAs can be regarded as setting multiple lasers in parallel in the first laser unit 401a, and the technical effect achieved is the same as that achieved by setting multiple lasers in parallel in the first laser unit 401a.

[0131] In one possible embodiment, the second laser unit 401b described above may also include one or more lasers.

[0132] When the second laser unit 401b includes a laser, as shown in Figure 4, the anode of the laser is connected to the first switch K1, and the cathode of the laser is connected to the first laser unit 401a.

[0133] When the second laser unit 401b includes multiple lasers, as shown in Figure 5, the multiple lasers are connected in parallel, the anodes of the multiple lasers are connected to the first switch K1, and the cathodes of the multiple lasers are connected to the first laser unit 401a.

[0134] In one possible embodiment, each of the at least two first laser emission channels 401 included in the above-described emission system 40 includes the same first laser unit 401a and the same second laser unit 401b.

[0135] It is understood that, compared with a typical laser emission channel that includes only one laser unit, the emission system 40 in this embodiment is equipped with two laser units (or more than two laser units) for each of the first laser emission channels 401, which can simultaneously improve the emission power and driving efficiency of the laser.

[0136] In one possible embodiment, the two laser units (401a and 401b) in the first laser emission channel 401 described above can be configured in ways including but not limited to the following:

[0137] Setup Method 1:

[0138] The first laser unit 401a is disposed on the first chip, and the second laser unit 401b is disposed on the second chip.

[0139] The first chip and the second chip are connected by a metal wire.

[0140] Optionally, refer to Figure 6A, which is a schematic diagram of a laser unit configuration provided in an embodiment of this application.

[0141] As shown in Figure 6A, the first laser unit 401a is disposed on chip A, and the second laser unit 401b is disposed on chip B.

[0142] Chip A and chip B can be connected by bonding wires, but this application does not limit this.

[0143] It is understood that Figure 6A shows 6 first laser units 401a and 6 second laser units 401b, and each connected first laser unit 401a and second laser unit 401b constitutes a first laser emission channel 401.

[0144] It should be understood that the number of the first laser unit 401a and the second laser unit 401b shown in FIG6A above is only for illustrative purposes and should not be construed as limiting the embodiments of this application.

[0145] Setting method two:

[0146] The first laser unit 401a and the second laser unit 401b are disposed on the same chip (the third chip).

[0147] The first laser unit 401a and the second laser unit 401b are connected by interconnecting vias.

[0148] Alternatively, refer to Figure 6B, which is a schematic diagram of another laser unit configuration provided in an embodiment of this application.

[0149] As shown in Figure 6B, the first laser unit 401a and the second laser unit 401b are disposed on the chip C.

[0150] The first laser unit 401a and the second laser unit 401b can be connected by on-chip interconnection technology such as interconnect vias, and this application embodiment does not limit this.

[0151] It is understood that Figure 6B shows 6 first laser units 401a and 6 second laser units 401b, and each connected first laser unit 401a and second laser unit 401b constitutes a first laser emission channel 401.

[0152] It should be understood that the number of the first laser unit 401a and the second laser unit 401b shown in FIG6B above is only for illustrative purposes and should not be construed as limiting the embodiments of this application.

[0153] It should be understood that the circles in Figures 6A and 6B above represent optical apertures (OA). Increasing the number of OAs can also be regarded as setting multiple lasers in parallel in a laser unit. By increasing the number of OAs, the emission power of the laser can be increased.

[0154] In one possible embodiment, the plurality of first laser units 401a in the above-described emission system 40 can be configured in ways including but not limited to the following:

[0155] Setup Method 1:

[0156] Multiple first laser units 401a in the emission system 40 are disposed on the chip.

[0157] The anodes of the plurality of first laser units 401a are isolated from each other, while the cathodes of the plurality of first laser units 401a are interconnected within the chip.

[0158] Optionally, refer to Figure 7A, which is a schematic diagram of a laser unit configuration provided in an embodiment of this application.

[0159] As shown in Figure 7A, multiple first laser units 401a in the emission system 40 are disposed on the chip D.

[0160] The anodes of the plurality of first laser units 401a are isolated from each other, and the cathodes of the plurality of first laser units 401a are interconnected within the chip D.

[0161] Understandably, at this time, multiple first laser units 401a can form an anode-isolated, common-cathode multichannel vertical-cavity surface-emitting laser (VCSEL) array.

[0162] It should be understood that the number of the first laser unit 401a and the second laser unit 401b shown in FIG7A above is only for illustrative purposes and should not be construed as limiting the embodiments of this application.

[0163] Setting method two:

[0164] Multiple first laser units 401a in the emission system 40 are disposed on the chip.

[0165] The anodes of the plurality of first laser units 401a are isolated from each other, the cathodes of the plurality of first laser units 401a are isolated from each other within the chip, and the cathodes of the plurality of first laser units 401a are interconnected through an external printed circuit board (PCB).

[0166] Alternatively, refer to Figure 7B, which is a schematic diagram of another laser unit configuration provided in an embodiment of this application.

[0167] As shown in Figure 7B, multiple first laser units 401a in the emission system 40 are disposed on the chip E.

[0168] The anodes of the plurality of first laser units 401a are isolated from each other, the cathodes of the plurality of first laser units 401a are isolated from each other within the chip E, and the cathodes of the plurality of first laser units 401a are interconnected through the PCB.

[0169] Understandably, at this time, multiple first laser units 401a can form a multi-channel VCSEL array with anode isolation and cathode isolation, and the cathodes can be interconnected through an external PCB.

[0170] It should be understood that the number of the first laser unit 401a and the second laser unit 401b shown in FIG7B above is only for illustrative purposes and should not be construed as limiting the embodiments of this application.

[0171] It should be understood that the circles in Figures 7A and 7B above represent optical apertures (OA). Increasing the number of OAs can also be regarded as setting multiple lasers in parallel in a laser unit. By increasing the number of OAs, the emission power of the laser can be increased.

[0172] In one possible embodiment, the above-described launching system 40 further includes, but is not limited to:

[0173] At least one second laser emission channel 402.

[0174] The second laser emission channel 402 includes, but is not limited to:

[0175] The third laser unit 402a, the second energy storage unit C2, and the second switch K2.

[0176] The first power supply V1 is connected to the third laser unit 402a and the second energy storage unit C2 through the second switch K2. The third laser unit 402a and the second energy storage unit C2 are connected in parallel. The first driving unit 400 is connected to the third laser unit 402a.

[0177] The first driving unit 400 is also used to drive the third laser unit 402a to emit a beam.

[0178] Optionally, please refer to Figure 8, which is a schematic diagram of another launching system provided in an embodiment of this application.

[0179] As shown in Figure 8, when the second switch K2 is closed, the first power supply V1 charges the second energy storage unit C2, and the second energy storage unit C2 stores a certain amount of electricity. After the second switch K2 is opened, even without charging by the first power supply V1, the second energy storage unit C2 can still supply power to the third laser unit 402a, and the third laser unit 402a emits laser light under the drive of the first driving unit 400.

[0180] It is understood that Figure 8 shows two second laser emission channels 402. In fact, the emission system 40 may include two or more of any number of second laser emission channels 402. This application embodiment does not limit this, nor should Figure 8 constitute a limitation on the embodiments of this application.

[0181] It is understood that the emission system 40 in this application embodiment is equipped with one or more laser units for the laser emission channel. As long as two or more laser units are provided for any one or more laser emission channels, compared with a general laser emission channel that only includes one laser unit, the emission power and driving efficiency of the laser can be improved simultaneously.

[0182] Optionally, the laser unit in the transmitting system 40 shown in FIG8 can be configured as shown in FIG9, which is a schematic diagram of a laser unit configuration provided in an embodiment of this application.

[0183] As shown in Figure 9, the four second laser units 401b in the transmitting system 40 are disposed on the same chip. The anodes of the four second laser units 401b are isolated from each other, and the cathodes are isolated from each other. In this case, the four second laser units 401b can form a multi-channel VCSEL array with anode isolation and cathode isolation. The four first laser units 401a and two third laser units 402a in the transmitting system 40 are disposed on another chip. The anodes of the four first laser units 401a and two third laser units 402a are isolated from each other, and the cathodes are interconnected within the chip. In this case, the four first laser units 401a and two third laser units 402a can form a multi-channel VCSEL array with anode isolation and common cathode.

[0184] Furthermore, the four second laser units 401b and the four first laser units 401a can be connected one-to-one by bonding lines.

[0185] It is understood that Figure 9 shows two third laser units 402a, each of which constitutes a second laser emission channel 402. Figure 9 also shows four first laser units 401a and four second laser units 401b, each of which, when connected, constitutes a first laser emission channel 401.

[0186] It should be understood that the number of the first laser unit 401a, the second laser unit 401b, and the third laser unit 402a shown in FIG9 above is only for illustrative purposes and should not be construed as limiting the embodiments of this application.

[0187] Alternatively, the laser unit in the transmitting system 40 shown in FIG8 can also be configured as shown in FIG10, which is a schematic diagram of another configuration of the laser unit provided in the embodiment of this application.

[0188] As shown in Figure 10, the anode of the middle region of the laser unit located in the second row from top to bottom (i.e., the laser unit connected to the driver) is connected to two rows of laser units (i.e., the laser units located in the middle regions of the first and third rows from top to bottom respectively). The anode of the two end regions of the laser unit located in the second row from top to bottom (i.e., the laser unit connected to the driver) is connected to a row of laser units (i.e., the laser units located in the two end regions of the third row from top to bottom).

[0189] It is understandable that the laser unit arrangement shown in Figure 10 can improve the emission power of the middle region of the laser emission channel.

[0190] In one possible embodiment, the drive unit 400 in the above-described transmission system 40 may include one or more drivers, and the arrangement of the drivers may vary depending on the number of drivers included, as shown below:

[0191] Scenario 1:

[0192] The driving unit 400 includes a driver, which is disposed along a first direction at the beginning, end, or middle of the laser emission channel in the emission system 40.

[0193] The first direction refers to the arrangement direction of the laser emission channels in the emission system 40.

[0194] It is understandable that when the drive unit 400 includes a driver, the driver can be disposed at the beginning or end of the laser emission channel in the emission system 40 along the first direction, which is beneficial for the heat dissipation of the driver.

[0195] It is understandable that the driver can also be positioned in the middle of the laser emission channel in the emission system 40 along the first direction. In this case, the overall emission power of the multiple lasers in the laser emission channel has a small difference. Therefore, this arrangement can improve the consistency of the emission power of the multiple lasers in the laser emission channel in terms of position layout.

[0196] Optionally, the driver may also be disposed at other locations in the laser emission channel of the emission system 40 along the first direction, and this embodiment of the application does not limit this.

[0197] Scenario 2:

[0198] The driving unit 400 includes at least two drivers, and the at least two drivers are respectively disposed at both ends or in the middle of the laser emission channel in the emission system 40 along the first direction.

[0199] The first direction refers to the arrangement direction of the laser emission channels in the emission system 40.

[0200] It is understandable that when the driving unit 400 includes at least two drivers, these at least two drivers can be respectively disposed at both ends of the laser emission channel in the emission system along the first direction, which is beneficial for the heat dissipation of the drivers. At this time, the overall difference in emission power of the multiple lasers in the laser emission channel is small. Therefore, this arrangement can also improve the consistency of emission power of the multiple lasers in the laser emission channel from the perspective of position layout.

[0201] It is understood that the at least two drivers can also be arranged in the middle of the laser emission channel in the emission system 40 along the first direction. In this case, the overall difference in emission power of the multiple lasers in the laser emission channel is small. Therefore, this arrangement can improve the consistency of emission power of the multiple lasers in the laser emission channel in terms of position layout.

[0202] Optionally, the at least two drivers may also be disposed at other locations in the laser emission channel of the emission system along the first direction, and this application embodiment does not limit this.

[0203] Optionally, the mirrored arrangement of at least two drivers can help optimize the wiring design between various modules within the launch system and improve space utilization.

[0204] It should be understood that the above scenarios one and two are merely illustrative examples of the arrangement of one or more drivers included in the drive unit 400, and should not be construed as limiting the embodiments of this application.

[0205] It should be understood that any new embodiments obtained by reasonable modifications, additions, or combinations of the above-described situations one to two are all within the protection scope of the embodiments of this application.

[0206] In one possible embodiment, the laser emission channel in the above-described emission system 40 is disposed on a printed circuit board (PCB).

[0207] Optionally, the laser emission channel in the above-mentioned emission system 40 can be disposed on the front side of the PCB or on the back side of the PCB. This application embodiment does not limit this.

[0208] Optionally, the drive unit 400 in the above-mentioned transmission system 40 can be located on the reverse side of the PCB, which is beneficial to optimize the routing design between various modules in the transmission system 40 and improve space utilization.

[0209] This application provides a chip that includes the transmission system provided in this application.

[0210] This application provides a radar or radar system, which includes the transmitting system provided in this application or the chip described above.

[0211] In one possible implementation, the radar includes, but is not limited to, lidar.

[0212] In one possible implementation, there may be a smart sensor that integrates multiple sensors. In the case where the smart sensor includes, but is not limited to, laser detection functions, the smart sensor may also be called a radar or radar system.

[0213] This application also provides a terminal device, which includes the transmitting system, chip, radar, or radar system provided in this application. For example, the terminal device can be a means of transportation, such as a car, truck, aircraft, drone, slow-moving vehicle, spacecraft, or ship, or any other possible vehicle used in any scenario. It can also be any device capable of carrying a detection device, such as surveying equipment. One or more transmitting systems, chips, radars, or radar systems provided in this application are deployed on the terminal device.

[0214] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A launching system, characterized in that, The emission system includes at least two first laser emission channels, a first driving unit, and a first power supply. The at least two first laser emission channels are connected in parallel, with one side of each first laser emission channel connected to the first power supply and the other side connected to the first driving unit. The first laser emission channel includes: First laser unit, second laser unit, first energy storage unit, first switch; The first energy storage unit and the second laser unit are connected in parallel. One side of the first energy storage unit and the second laser unit are connected to the first power supply through the first switch. The other side of the second laser unit is connected to the first laser unit. The first laser unit is connected to the first driving unit. The first driving unit is used to drive the first laser unit and the second laser unit to emit beams.

2. The launching system according to claim 1, characterized in that, The first laser unit includes a laser, the anode of which is connected to the second laser unit, and the cathode of which is connected to the first driving unit; Alternatively, the first laser unit may include multiple lasers connected in parallel, with the anodes of the multiple lasers connected to the second laser unit and the cathodes of the multiple lasers connected to the first driving unit.

3. The launching system according to claim 1 or 2, characterized in that, Each of the at least two first laser emission channels includes the same first laser unit and the same second laser unit.

4. The launching system according to any one of claims 1 to 3, characterized in that, The first laser unit is disposed on a first chip, and the second laser unit is disposed on a second chip, with the first chip and the second chip connected by a metal wire; or... The first laser unit and the second laser unit are disposed on the third chip, and the first laser unit and the second laser unit are connected through interconnect vias.

5. The launching system according to any one of claims 1 to 4, characterized in that, In the emission system, multiple first laser units are disposed on a chip, with the anodes of the multiple first laser units isolated from each other, and the cathodes of the multiple first laser units interconnected within the chip; or, The multiple first laser units in the emission system are disposed on the chip. The anodes of the multiple first laser units are isolated from each other, the cathodes of the multiple first laser units are isolated from each other within the chip, and the cathodes of the multiple first laser units are interconnected through an external printed circuit board (PCB).

6. The launching system according to any one of claims 1 to 5, characterized in that, The emission system also includes at least one second laser emission channel; The second laser emission channel includes: Third laser unit, second energy storage unit, second switch; The first power supply is connected to the third laser unit and the second energy storage unit via the second switch. The third laser unit and the second energy storage unit are connected in parallel. The first driving unit is connected to the third laser unit. The first driving unit is also used to drive the third laser unit to emit a beam.

7. The launching system according to any one of claims 1 to 6, characterized in that, The first driving unit includes a driver, which is disposed at the beginning, end or middle of the laser emission channel in the emission system along a first direction, wherein the first direction is the arrangement direction of the laser emission channel in the emission system.

8. The launching system according to claim 7, characterized in that, The driver is located on the reverse side of the circuit board that carries the laser emission channel in the emission system.

9. The launching system according to any one of claims 1 to 6, characterized in that, The driving unit includes at least two drivers, which are respectively disposed at both ends of the laser emission channel in the emission system along a first direction, the first direction being the arrangement direction of the laser emission channel in the emission system.

10. The launching system according to claim 9, characterized in that, The at least two drivers are arranged in a mirror image.

11. The launching system according to any one of claims 1 to 10, characterized in that, The laser emission channel in the emission system is located on a printed circuit board (PCB).

12. A chip, characterized in that, The chip includes the transmission system according to any one of claims 1 to 11.

13. A radar, characterized in that, The radar includes the transmitting system according to any one of claims 1 to 11, or the chip according to claim 12.

14. A terminal device, characterized in that, The terminal device includes the transmitting system according to any one of claims 1 to 11, or the chip according to claim 12, or the radar according to claim 13.

15. A vehicle end, characterized in that, The vehicle end includes the transmitting system according to any one of claims 1 to 11, or the chip according to claim 12, or the radar according to claim 13, or the terminal device according to claim 14.

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