Laser emission module and lidar having the same

Abstract

The present invention discloses a laser emission module and a lidar having the same. The laser emission module according to an embodiment of the present invention includes: a substrate; a support portion provided on the substrate and having a metal pattern formed on its surface; two light emitting portions provided on two opposite side surfaces of the support portion, each including a plurality of lasers capable of emitting laser light, and the light emitting portions are electrically connected to the substrate through the metal pattern.

Description

Technical Field

[0001] The present invention relates to the field of optics, and particularly to a lidar and a transmitting module of the lidar. Background Art

[0002] In the field of autonomous driving, autonomous vehicles can detect surrounding objects with the help of devices such as lidar (LIDAR). The lidar can emit laser beams into the surrounding three-dimensional space as detection signals, and after the laser beams irradiate objects in the surrounding space and are reflected to become echo signals and return, the lidar compares the received echo signals with the emitted detection signals to obtain relevant information about surrounding objects such as distance and speed.

[0003] As described above, the lidar includes a transmitting module and a receiving module. The transmitting module generates and emits laser beams, and the laser beams that are hit on surrounding objects and reflected back are received by the receiving module. Since the speed of light is known, the distance of surrounding objects relative to the lidar can be measured by the propagation time of the laser.

[0004] Regarding the emission of laser, existing lidars have achieved 32-line or 64-line laser output. In such multi-line lidars, a structure of arranging multiple edge-emitting lasers (EELs) in the transmitting module is adopted. The laser of the edge-emitting laser emits perpendicularly to the top surface, that is, the laser emits from the side surface of the edge-emitting laser. Therefore, in the prior art, multiple edge-emitting lasers are respectively arranged at the edges of multiple substrates, and then the multiple substrates are stacked to implement a multi-line lidar.

[0005] However, in the above structure, since a multi-line lidar is implemented by stacking multiple substrates, when the number of lines of the lidar reaches 64 or even 128, the size of the transmitting module will become larger, and because ray correction needs to be performed on each substrate provided with an edge-emitting laser respectively, it takes a long time to correct all the substrates, which will lead to a decrease in the production speed of the lidar and an increase in the manufacturing cost. Summary of the Invention

[0006] The present invention provides a laser transmitting module conducive to miniaturization and a lidar having the same.

[0007] The laser transmitting module according to an embodiment of the present invention includes: a substrate; a support portion provided on the substrate and having a metal pattern formed on its surface; two light-emitting portions provided on two opposite side surfaces of the support portion, each including a plurality of lasers capable of emitting laser, and the light-emitting portion is electrically connected to the substrate through the metal pattern.

[0008] Moreover, the laser can be an edge-emitting laser, and the light-emitting portion emits laser in a direction perpendicular to the substrate.

[0009] Moreover, the metal pattern may include a plurality of middle patterns equal in number to the number of the lasers and two end patterns. The two end patterns are formed on both sides in the longitudinal direction of the side surface, and the plurality of middle patterns are formed between the two end patterns.

[0010] Moreover, each of the end patterns may be disposed on the two side surfaces of the support portion and on the surface of the support portion that is in contact with the substrate, and a connection is formed between the two side surfaces of the support portion and the surface of the support portion that is in contact with the substrate.

[0011] Moreover, the end patterns may be formed in the same shape on the two side surfaces of the support portion and on the surface of the support portion that is in contact with the substrate.

[0012] Moreover, the plurality of middle patterns may be distributed on the two side surfaces of the support portion. The middle patterns on different side surfaces do not overlap with each other along the longitudinal direction of one side surface, and each middle pattern extends from one surface of the two side surfaces of the support portion to the surface of the support portion that is in contact with the substrate.

[0013] Moreover, on the surface of the support portion that is in contact with the substrate, a predetermined distance may be provided between the middle patterns formed on different side surfaces.

[0014] Moreover, each light-emitting portion may include a cathode equal in number to the number of the lasers included and an anode. The cathodes are respectively electrically connected to the middle patterns, the anode is electrically connected to the end pattern, and the width of the end pattern is greater than that of each middle pattern.

[0015] Moreover, each light-emitting portion may include an anode equal in number to the number of the lasers included and a cathode. The anodes are respectively electrically connected to the middle patterns, the cathode is electrically connected to the end pattern, and the width of the end pattern is greater than that of each middle pattern.

[0016] Moreover, a plurality of drive circuits capable of driving the light-emitting portion to emit laser light may be provided on the substrate. The light-emitting portion is electrically connected to the drive circuits through the metal pattern, and the plurality of drive circuits are distributed on both sides of the support portion on the substrate.

[0017] Moreover, the support portion may be formed of a ceramic material.

[0018] Moreover, the metal pattern may be disposed above the substrate perpendicular to the substrate, and the plurality of metal patterns are arranged parallel to each other.

[0019] The lidar according to another embodiment of the present invention includes the laser emission module as described above and a laser reception module having a sensor for sensing light.

[0020] Furthermore, it may further include: a rotating member that rotates the laser emission module and the laser reception module.

[0021] According to an embodiment of the present invention, the laser emission directions of the multiple lasers of the light emitting part can be adjusted to be perpendicular to the substrate, so the length of the laser emission module in the laser emission direction can be reduced. And by arranging the light emitting part on the support part made of ceramic material, compared with the case where the light emitting part is directly arranged on the printed circuit board, it helps the heat dissipation of the light emitting part and improves the reliability. And since the light emitting part including multiple lasers is arranged on one support part, there is no need to perform optical alignment on each edge-emitting laser arranged on different substrates when assembling the laser emission module. And it is beneficial to the miniaturization of the laser emission module and the lidar.

[0022] Furthermore, by making the metal pattern include an end pattern and a middle pattern, and connecting the cathode and anode of the light emitting part to the end pattern and the middle pattern respectively, it is beneficial to the miniaturization of the laser emission module.

[0023] The effects of the present invention are not limited to the above-mentioned effects, and those skilled in the art can obtain effects not recorded above from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a perspective view showing a laser emission module according to an embodiment of the present invention.

[0025] Figure 2 It is a plan view showing a laser emission module according to an embodiment of the present invention.

[0026] Figure 3 It is a side view showing a laser emission module according to an embodiment of the present invention.

[0027] Figure 4 It is a plan view showing a light emitting part according to an embodiment of the present invention.

[0028] Figure 5 It is a view showing one long side surface of a support part according to an embodiment of the present invention.

[0029] Figure 6 It is a view showing another long side surface of a support part according to an embodiment of the present invention.

[0030] Figure 7 It is a view showing the bottom surface of a support part according to an embodiment of the present invention.

[0031] Figure 8 It is a schematic diagram showing a lidar according to an embodiment of the present invention.

[0032] Symbol Explanation

[0033] 10: Laser emission module 20: Laser reception module

[0034] 100: Light emitting part 200: Support part

[0035] 210: Metal pattern 211: End pattern

[0036] 212: Middle pattern 300: Substrate

[0037] 400: Metal wire 600: Sensor

[0038] 30: Processor Detailed Embodiment

[0039] Next, the technical solutions of the embodiments of the present invention will be described in detail in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the embodiments disclosed below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the protection scope of the present invention.

[0040] Moreover, in the description of the present invention, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship of the accompanying drawings, and is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] Figure 1 It is a perspective view showing a laser emission module 10 according to an embodiment of the present invention. Figure 2 It is a plan view showing a laser emission module 10 according to an embodiment of the present invention. Figure 3 It is a side view showing a laser emission module 10 according to an embodiment of the present invention.

[0042] The laser emission module 10 can be disposed in the lidar and can emit laser light so that the laser light is reflected by an object outside the lidar and then returns to the lidar, thereby enabling the measurement of the distance between the surrounding objects and the lidar by the time-of-flight method (TOF).

[0043] As Figures 1 to 3 shown, the laser emission module 10 according to an embodiment of the present invention includes two light emitting parts 100, a support part 200, and a substrate 300.

[0044] The light-emitting part 100 may include a plurality of lasers. The lasers may be edge-emitting lasers (EELs) or vertical-cavity surface-emitting lasers (VCSELs). Moreover, the light-emitting part 100 may have a structure in which a plurality of edge-emitting lasers (EELs) or a plurality of vertical-cavity surface-emitting lasers (VCSELs) are integrally combined. Among them, the laser of the edge-emitting laser (EEL) emits parallel to the substrate, while the laser of the vertical-cavity surface-emitting laser (VCSEL) emits perpendicular to the substrate. Therefore, the vertical-cavity surface-emitting laser is more suitable for realizing a large-scale array. However, compared with the edge-emitting laser, the vertical-cavity surface-emitting laser has a low emission power, so there are limitations in the use of long-distance lidars at present. Therefore, the edge-emitting laser (EEL) is preferably used in long-distance lidars. In the following description, the case where the light-emitting part 100 is constituted by a plurality of edge-emitting lasers (EELs) will be described. Those skilled in the art can understand that although the present invention describes the case where the light-emitting part 100 includes a plurality of edge-emitting lasers (EELs), it can also be applied to the case where the light-emitting part 100 includes a plurality of vertical-cavity surface-emitting lasers (VCSELs).

[0045] Figure 4 is a plan view showing a light-emitting part 100 according to an embodiment of the present invention.

[0046] As Figure 4 shown, the plurality of edge-emitting lasers included in the light-emitting part 100 may have a structure in which cathodes or anodes are connected to each other while the other poles of the cathodes and anodes are isolated from each other. For example, the anodes of the plurality of edge-emitting lasers included in the light-emitting part 100 may be connected to each other to form one anode, while the cathodes are separately formed, or the cathodes of the plurality of edge-emitting lasers included in the light-emitting part 100 may be connected to each other to form one cathode, while the anodes are separately formed. In the following description, the case where the anodes of the plurality of edge-emitting lasers included in the light-emitting part 100 are connected to each other and the cathodes are separately formed will be described.

[0047] As Figure 4 shown, the plurality of protruding parts on the upper part of the light-emitting part 100 may be the cathodes of the respective edge-emitting lasers, and the lower part of the light-emitting part 100 may be the anodes of the plurality of edge-emitting lasers. Figure 4 shows a case where the light-emitting part 100 has 16 cathodes and 1 anode. Moreover, a laser capable of emitting laser light may be formed between one cathode and anode. The plurality of lasers may each have a separate cathode, and the anodes of the plurality of lasers may be connected to each other to form an integral anode. By providing drive signals to the cathode and anode, the Figure 4The light-emitting unit 100 shown emits laser light in the vertical direction, i.e., above the plane of the paper. The cathode and the anode can be respectively connected to a driving circuit provided on the substrate 300.

[0048] The number of the cathodes can be equal to the number of lasers included in the light-emitting unit 100. That is, one edge-emitting laser can be formed between one cathode and the anode. The number of edge-emitting lasers that the light-emitting unit 100 can include is not limited. For example, one light-emitting unit 100 can include 16, 32, or 64 edge-emitting lasers. The number of edge-emitting lasers included in the light-emitting unit 100 can be variously changed according to, for example, the requirements of the designer, the sizes of the support part 200 and the light-emitting unit 100, the number of driving circuits provided on the substrate 300, etc.

[0049] As Figures 1 to 3 shown, the support part 200 is provided on the substrate 300. For example, the support part 200 can be provided on one side of the substrate 300. The support part 200 can support the light-emitting unit 100 and can electrically connect the light-emitting unit 100 to the substrate 300.

[0050] The support part 200 can be in the shape of a hexahedron, and preferably in the shape of a cuboid, and more preferably in the shape of a cuboid with two square faces. In this embodiment, the face of the support part 200 that is in contact with the substrate 300 is called the bottom face; the face of the support part 200 that faces the bottom face is called the top face; the four faces of the support part 200 other than the bottom face and the top face are called the side faces; the two longer side faces among the four side faces of the support part 200 are called the long side faces; the two shorter side faces among the side faces of the support part 200 are called the short side faces. Among them, the two short side faces can be square.

[0051] In an embodiment of the present invention, the support part 200 can be formed of a ceramic material. Compared with a common printed circuit board, the ceramic material has a high thermal conductivity and a thermal expansion coefficient that is more matched with the light-emitting unit 100. Therefore, forming the support part 200 of the ceramic material can reduce the damage phenomenon caused by the heat generation of the light-emitting unit 100.

[0052] In an embodiment of the present invention, as Figures 1 to 3 shown, two light-emitting units 100 are respectively provided on the two long side faces of the support part 200. And, the surface of the light-emitting unit 100 facing above the substrate can be flush with the surface of the support part 200 facing above the substrate.

[0053] And, the light-emitting unit 100 is preferably provided on the support part 200 in such a way that the light-emitting region faces above the substrate 300. More preferably, the direction of the light emitted by the light-emitting unit 100 is perpendicular to the substrate 300. That is, Figure 4The upper part of the light-emitting unit 100 shown can face the support unit 200. Figure 4 The lower part of the light-emitting unit 100 shown can face the outside of the support unit 200. Further, the direction of the light emitted by the light-emitting unit 100 may not be perpendicular to the substrate 300, and the light-emitting unit 100 can emit laser light obliquely upward toward the substrate 300.

[0054] By arranging the light-emitting unit 100 on the support unit 200 to emit laser light upward toward the substrate 300, the emission direction of the laser beam can be changed from being parallel to the substrate in the prior art to being perpendicular to the substrate. Therefore, the length of the laser emission module 10 in the laser emission direction can be reduced, and thus the length of the lidar in the laser emission direction can be reduced.

[0055] The substrate 300 can be a printed circuit board (PCB). A circuit can be formed on the substrate 300. And a driving circuit can be provided on the substrate 300, and the driving circuit can drive the light-emitting unit 100 provided on the support unit 200 to cause the light-emitting unit 100 to emit laser light.

[0056] The number of the driving circuits can be the same as the number of the laser diodes included in the two light-emitting units 100. And the driving circuits can be distributed on both sides of the support unit 200 on the substrate 300. Therefore, compared with the case where the driving circuits are arranged on one side of the support unit 200, the length of the substrate 300 required for arranging the driving circuits can be reduced.

[0057] Figure 5 FIG. shows a metal pattern 210 formed on a support unit 200 according to an embodiment of the present invention. Figure 5 FIG. shows a long side surface of a support unit 200 according to an embodiment of the present invention.

[0058] A metal pattern 210 can be formed on the surface of the support unit 200. On a long side surface of the support unit 200, the metal pattern 210 can include two end patterns 211 located at the left and right ends and a middle pattern 212 formed between the two end patterns 211. The end pattern 211 can electrically connect the anode of the light-emitting unit 100 provided on the support unit 200 to the substrate 300; the middle pattern 212 can electrically connect the cathode of the light-emitting unit 100 provided on the support unit 200 to the substrate 300. Refer to Figure 5 , in an embodiment of the present invention, the case where the end patterns 211 are formed on both sides of the long side surface of the support unit 200 in the direction parallel to the substrate (i.e., the length direction) is described, but one of the two end patterns 211 can also be omitted and the end pattern 211 can be formed only at one end of the long side surface of the support unit 200.

[0059] The middle pattern 212 located on one long side of the support portion 200 may be formed in a number corresponding to the number of cathodes of the light emitting portion 100 provided on the long side. For example, when the light emitting portion 100 includes 16 edge-emitting lasers, the middle pattern 212 may be formed in 16. Therefore, the middle pattern 212 can electrically connect the cathodes of the light emitting portion 100 to the substrate 300 respectively, so that a plurality of lasers included in the light emitting portion 100 can be independently driven.

[0060] As Figure 5 shown, the metal pattern 210 may be formed in the shape of a metal strip on the support portion 200. And a plurality of metal patterns 210 may be spaced apart from each other respectively. More specifically, on the long side of the support portion 200, the metal pattern 210 may be formed to extend from the top to the bottom, so that the length of the metal pattern 210 on the long side of the support portion 200 may be equal to the width of the long side. Further, the width of the middle pattern 212 may be formed in a manner capable of forming an electrical connection with the cathode of the light emitting portion 100. The width of the end pattern 211 may be formed to be greater than the width of each of the middle patterns 211. By forming the width of the end pattern 211 to be larger, when the support portion 200 is fixed to the substrate 300, the contact area between the end pattern 211 and the substrate 300 can be increased, thereby increasing the welding area and improving the welding strength. For example, the width of each end pattern 211 may be formed to be more than 8% of the length of the long side of the entire support portion 200. When the width of the end pattern 211 is less than 8% of the length of the long side of the support portion 200, the strength of fixing the support portion 200 to the substrate 300 may not be ensured.

[0061] Further, a plurality of the metal patterns 210 may be parallel to prevent connection between each other. Further, the metal pattern 210 may be disposed perpendicular to the substrate 300 above the substrate 300. By forming the metal patterns 210 to be parallel to each other and perpendicular to the substrate, the formation process of the metal patterns 210 can be simplified, the material of the metal patterns 210 can be saved, and the isolation between the metal patterns can be effectively ensured.

[0062] The metal pattern 210 may be, for example, a metal plate or a metal thin layer (such as gold foil), and may be formed on the surface of the support portion 200 by electroplating.

[0063] Figure 6 is a view showing another long side of the support portion 200 according to an embodiment of the present invention.

[0064] Figure 6 The long side of the support portion shown in Figure 5The difference in the long sides shown in is that Figure 6 the middle pattern 212 in Figure 5 is formed by staggering the middle pattern 212 in along the length direction of the long side. Alternatively, the middle pattern 212 formed on one long side of the support portion 200 and the middle pattern 212 formed on the other long side of the support portion 200 may not overlap with each other in the Figure 1 shown y direction. Accordingly, the light emitted by the lasers included in the two light emitting portions 100 mounted on the two long sides of the support portion 200 may not overlap in the y direction. By making the laser light emitted by the lasers not overlap in the y direction, the number of effective laser emission lines of the lidar can be increased.

[0065] Figure 7 FIG. is a view showing the bottom surface of the support portion according to an embodiment of the present invention.

[0066] As Figure 7 shown, the end patterns 211 and the middle pattern 212 formed on the two long sides of the support portion 200 extend to the bottom surface of the support portion 200.

[0067] Among them, the end patterns 211 are connected to each other on the bottom surface of the support portion 200. Therefore, the two end patterns 211 on both sides of the two sides of the support portion 200 can be connected to each other respectively, so that two left and right end patterns 211 can be formed on the support portion 200. And the same electrical signal can be applied to the two end patterns 211 formed on the support portion 200 through the substrate 300.

[0068] And, the middle pattern 212 formed on the two long sides of the support portion 200 can extend to the bottom surface of the support portion 200, but does not form a connection with the middle pattern 212 formed on the other long side of the support portion 200. Therefore, electrical signals can be applied to each of the middle patterns 212 through the substrate 300. That is, as Figure 7 shown, different electrical signals can be applied to the 32 middle patterns 212 respectively, so that different signals can be applied to the cathodes of the plurality of light emitting portions 100 respectively, and thus the plurality of lasers included in the light emitting portions can be controlled individually.

[0069] As Figure 7 shown, the separation distance d1 between the middle patterns 212 formed on different long sides of the support portion 200 on the bottom surface of the support portion 200 can vary diversely. And the separation distance d1 can be appropriately set in consideration of the electrical isolation between the middle patterns 212 and the electrical connection between the middle patterns 212 and the substrate 300. In some cases, the separation distance d1 can even be negative, that is, the middle patterns 212 on different long sides may partially overlap in the y direction.

[0070] When the light-emitting unit 100 is provided on the support unit 200 and the support unit 200 is provided on the substrate 300, the cathode and anode of the light-emitting unit 100 can be electrically connected to the substrate 300 through the metal pattern 210 as described above. More specifically, they can be electrically connected to the driving circuit of the substrate 300.

[0071] The metal pattern 210 formed on the bottom surface of the support unit 200 can be used for soldering to the substrate 300. That is, after the substrate 300 forms solder having a shape corresponding to the metal pattern 210 on the bottom surface of the support unit 200 through a mask, the support unit 200 provided with the light-emitting unit 100 can be placed on the solder to fix the support unit 200 to the substrate 300, and the light-emitting unit 100 can be electrically connected to the substrate 300.

[0072] Referring to Figure 1 、 Figure 4 and Figure 5 , according to an embodiment of the present invention, when the light-emitting unit 100 is provided on the support unit 200, the cathode of the light-emitting unit 100 can be electrically connected to the middle pattern 212 through solder or a gold-tin alloy. And, the light-emitting unit 100 can be fixed to the support unit 200 through the above-mentioned solder or gold-tin alloy.

[0073] When the light-emitting unit 100 is provided on the support unit 200, the anode of the light-emitting unit 100 can be electrically connected to the end pattern 211 through the metal wire 400 (refer to Figure 3 ). That is, the surface of the light-emitting unit 100 can be connected to the end pattern 211 through the metal wire 400. Figure 3 shows a case where the light-emitting unit 100 is electrically connected to two end patterns 211 through four metal wires 400, but the present invention is not limited thereto, and the number of the metal wires 400 can be variously designed according to actual application situations. And, for ease of explanation, the metal wires 400 are omitted in Figure 1 、 Figure 2 , which does not mean that the embodiments of Figure 1 and Figure 2 do not include the metal wires 400. The metal wires 400 can be formed of a metal. For example, the metal wires 400 can be composed of a highly conductive metal such as gold, silver, copper, or aluminum.

[0074] Moreover, the short side surface of the support unit 200 is preferably square. Therefore, the shapes of the end patterns 211 formed on the two long side surfaces and the bottom surface of the support unit 200 where the light-emitting unit 100 is provided can be the same. The process of forming the metal pattern 210 on the support unit 200 can be simplified through the above structure.

[0075] As described above, the laser emission module 10 according to an embodiment of the present invention has been described. Through the laser emission module 10 as described above, the laser emission directions of a plurality of edge-emitting lasers can be adjusted to be perpendicular to the substrate, so that the length of the laser emission module 10 in the laser emission direction can be reduced. Further, by disposing the light emitting unit 100 on the support unit 200 made of ceramic material, compared with the case where the light emitting unit 100 is disposed on a printed circuit board, it helps the heat dissipation of the light emitting unit 100, and the thermal expansion coefficient of the ceramic material is more matched with that of the light emitting unit 100. Further, since a plurality of light emitting units 100 are disposed on the support unit 200 and the support unit 200 is disposed on the substrate 300, there is no need to perform optical alignment on each edge-emitting laser disposed on different substrates when assembling the laser emission module 10, and only the installation accuracy of the light emitting unit 100 needs to be ensured when the light emitting unit 100 is disposed on the support unit 200. Further, the laser emission module 10 as described above mounts a plurality of light emitting units 100 on one support unit 200, which is beneficial to the miniaturization of the laser emission module 10.

[0076] Figure 8 It is a schematic diagram showing a lidar according to an embodiment of the present invention.

[0077] Refer to Figure 8 According to an embodiment of the present invention, a lidar includes a laser emission module 10, a laser reception module 20, and a processor 30.

[0078] Refer to Figure 8 The laser emission module 10 described can be the same as the laser emission module 10 described with reference to Figures 1 to 7 the description.

[0079] In the laser emission module 10, a plurality of lasers included in the light emitting unit 100 can emit laser light in a set order based on the control of a control unit (not shown) and with the drive of the drive circuit.

[0080] Further, the laser light emitted by the light emitting unit 100 can have a predetermined emission angle after being diverged by a diverging lens (not shown) provided on the optical path of the lidar. Therefore, a predetermined angular range can be covered by one laser emission module according to the present invention. Among them, the horizontal angular range or the vertical angular range that the laser emission module 10 can cover can be variously changed according to the number of lasers included in the light emitting unit 100 and the diverging lens.

[0081] The laser light emitted from the laser emission module 10 and diverged by the diverging lens is reflected by an object outside the lidar and then returns to the lidar. The light returning to the lidar can be focused by a focusing lens (not shown) and then incident on the laser reception module 20.

[0082] The laser receiving module 20 may include a sensor for sensing light. At this time, the number of sensors 600 included in the laser receiving module 20 may be one or more. The sensor 600 may be a photoelectric sensor such as an APD or an SPAD. And, the output signal of the sensor 600 may be transmitted to the processor 30. The processor 30 may calculate the distance between an object outside the lidar and the lidar using the output signal of the sensor 600 based on the time-of-flight method (TOF).

[0083] Among them, according to an embodiment of the present invention, the length of the light emitting portion 100 of the laser emitting module 10 may be less than or equal to the maximum length of one of the sensors 600 or the overall maximum length of a plurality of the sensors 600. Thus, it is easy to make the laser emitted by the light emitting portion 100 irradiate the area where the sensor 600 is located.

[0084] According to an embodiment of the present invention, the size of the laser emitting module 10 can be reduced by the light emitting portion 100, the support portion 200, and the substrate 300 as described above. Since the size of the laser emitting module 10 is reduced, the size of the laser receiving module 20 can also be correspondingly reduced. Therefore, the size of the overall lidar can be reduced.

[0085] Moreover, the lidar according to an embodiment of the present invention may further include a rotating member (not shown). The rotating member may rotate the laser emitting module 10 and the laser receiving module 20. The rotation may be a 360° rotation.

[0086] The embodiments of the apparatus and method described above are merely illustrative. The separate units described therein may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one position or may be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to implement the technical solution of the present invention.

Claims

1. A laser emission module, characterized in that, Comprising: A substrate, which is a printed circuit board and is provided with a driving circuit; A support portion, which is disposed on the substrate, and a metal pattern is formed on a side surface of the light-emitting portion and a surface in contact with the substrate; the metal pattern is disposed perpendicular to the substrate on the side surface and extends to the surface in contact with the substrate, and a plurality of the metal patterns are arranged parallel to each other; the metal pattern includes a plurality of middle patterns having the same number as the number of lasers and two end patterns, the two end patterns are formed on both sides in the length direction of the side surface, and a plurality of the middle patterns are formed between the two end patterns; or the metal pattern includes a plurality of middle patterns having the same number as the number of lasers and one end pattern, the end pattern is formed on one side in the length direction of the side surface, and a plurality of the middle patterns are formed at positions adjacent to the end pattern; Two light-emitting portions, which are disposed on two opposite side surfaces of the support portion, and each includes a plurality of lasers capable of emitting laser light, and the plurality of lasers included in the light-emitting portion are structured such that cathodes or anodes are connected to each other while the other poles of the cathodes and anodes are isolated from each other; The light-emitting portion is electrically connected to the driving circuit of the substrate through the metal pattern, and the driving circuit drives the light-emitting portion to cause the light-emitting portion to emit laser light; specifically, the end pattern electrically connects the connected cathodes or anodes of the light-emitting portion to the driving circuit of the substrate, and the middle pattern electrically connects the other poles of the light-emitting portion that are isolated from each other to the driving circuit of the substrate.

2. The laser emission module according to claim 1, characterized in that, The laser is an edge-emitting laser, The light-emitting portion emits laser light in a direction perpendicular to the substrate.

3. The laser emission module according to claim 1, characterized in that, Each of the end patterns is disposed on the two side surfaces of the support portion and the surface of the support portion in contact with the substrate, and a connection is formed between the two side surfaces of the support portion and the surface of the support portion in contact with the substrate.

4. The laser emission module according to claim 1, characterized in that, The end patterns are formed in the same shape on the two side surfaces of the support portion and the surface of the support portion in contact with the substrate.

5. The laser emission module according to claim 1, characterized in that, A plurality of the middle patterns are distributed on the two side surfaces of the support portion, The middle patterns located on different side surfaces do not overlap each other along the length direction of one side surface, Each of the middle patterns extends from one of the two side surfaces of the support portion to the surface of the support portion in contact with the substrate.

6. The laser emission module according to claim 5, characterized in that, On the surface of the support portion in contact with the substrate, a predetermined distance is provided between the middle patterns formed on different side surfaces.

7. The laser emission module according to claim 1, characterized in that, Each of the light-emitting portions includes the same number of cathodes as the number of lasers included and one anode, The cathodes are respectively electrically connected to the middle patterns, The anode is electrically connected to the end pattern, The width of the end pattern is greater than that of each of the middle patterns.

8. The laser emission module according to claim 1, characterized in that, Each of the light-emitting portions includes the same number of anodes as the number of lasers included and one cathode, The anodes are respectively electrically connected to the middle patterns, The cathode is electrically connected to the end pattern, The width of the end pattern is greater than that of each of the middle patterns.

9. The laser emission module according to claim 1, characterized in that, A plurality of driving circuits capable of driving the light-emitting portion to cause the light-emitting portion to emit laser light are provided on the substrate, The light-emitting part is electrically connected to the driving circuit through the metal pattern. A plurality of the driving circuits are distributed on both sides of the supporting part on the substrate.

10. The laser emission module according to claim 1, characterized in that, The supporting part is formed of a ceramic material.

11. A lidar, characterized in that, Comprising the laser emission module according to any one of claims 1 to 10; A laser receiving module having a sensor for sensing light.

12. The lidar according to claim 11, characterized in that, Further comprising: A rotating member that rotates the laser emission module and the laser receiving module.

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