LiDAR and touch system

Abstract

This application provides a lidar and a touch control system. The lidar includes: an outer casing assembly, a laser emitting assembly, a rotor assembly, a stator assembly, and a bottom cover assembly. The outer casing assembly includes: a housing. The laser emitting assembly includes: a laser emitting circuit board, a laser, and a laser emitting circuit board support frame; the laser and the laser emitting circuit board are electrically connected. The rotor assembly includes: a rotor, a emitting reflector bracket, a emitting reflector, a receiving reflector bracket, a receiving reflector, a laser emitting lens, a laser receiving lens, a rotating shaft, a light guide column, and a motor rotor. The stator assembly includes: a motor stator assembly and a receiving main control circuit board; the motor stator assembly and the receiving main control circuit board, and the laser emitting circuit board are electrically connected. The bottom cover assembly includes: a USB circuit board, a first ribbon cable interface soldered to the USB circuit board, a power interface, a USB connector, and a bottom cover fixedly connected to the USB circuit board; the receiving main control circuit board and the first ribbon cable interface on the USB circuit board are electrically connected.

Description

Technical Field

[0001] This application relates to the fields of lidar and touch control, and particularly to lidar and touch control systems. Background Technology

[0002] Traditional touchscreen technologies include resistive, capacitive, surface acoustic wave (SAW) screens, and infrared touchscreens. These technologies all face challenges in producing large-size touchscreens. For example, resistive and capacitive screens are limited by the size of the conductive film, SAW screens are limited by the attenuation of ultrasonic waves propagating on the glass surface, and large-size infrared touchscreens suffer from low resolution, slow response time, and poor stability. Furthermore, SAW and infrared touchscreens require bezels to house the transmitter and receiver, contradicting the current trend towards narrow bezels in televisions. Additionally, converting a non-touchscreen to a touchscreen requires depositing electrodes into the non-touchscreen, which affects the display quality and is costly and difficult to implement. Utility Model Content

[0003] This application provides a lidar and touch system.

[0004] In a first aspect, embodiments of this application provide a lidar, including: an outer casing assembly 100, a laser emitting assembly 200, a rotor assembly 300, a stator assembly 400, and a bottom cover assembly 500.

[0005] The outer casing assembly 100 includes a housing 102, which has a power interface through hole 103 and a USB interface through hole 104.

[0006] The laser emitting assembly 200 includes: a laser emitting circuit board 201, a laser 202 mounted on the laser emitting circuit board 201, and a laser emitting circuit board support frame 205. The laser 202 and the laser emitting circuit board 201 are electrically connected. The laser emitting circuit board 201 and the laser emitting circuit board support frame 205 are fixedly connected. The laser emitting circuit board support frame 205 is fixedly connected to the motor stator 402 in the stator assembly 400.

[0007] The rotor assembly 300 includes: a rotor 301, a emitting reflector bracket 302 fixedly connected to the rotor 301, a emitting reflector 303 mounted on the emitting reflector bracket 302, a receiving reflector bracket 304 mounted in a reflector bracket mounting hole 314 on the rotor 301, a receiving reflector 305 mounted on the receiving reflector bracket 304, a laser emitting lens 306 mounted in a laser emitting lens mounting hole 315 on the rotor 301, a laser receiving lens 307 mounted in a laser receiving lens mounting hole 316 on the rotor 301, a rotating shaft 308 mounted at the center of the rotor 301, a light guide column 309 mounted in the rotating shaft 308, and a motor rotor 310 mounted in the rotor 301.

[0008] The stator assembly 400 includes: a motor stator assembly and a receiving main control circuit board 405 fixedly connected to the motor stator assembly; the motor stator assembly and the receiving main control circuit board 405 are electrically connected, and the motor stator assembly and the laser emitting circuit board 201 are electrically connected.

[0009] The bottom cover assembly 500 includes: a USB circuit board 501, a first ribbon cable interface 503, a power interface 504, and a USB connector 505 soldered on the USB circuit board 501, and a bottom cover 502 fixedly connected to the USB circuit board 501; the receiving main control circuit board 405 is electrically connected to the first ribbon cable interface 503 on the USB circuit board 501.

[0010] In some exemplary embodiments, the outer cover assembly 100 further includes a transmission shield 101, which is fixedly connected to the outer shell 102.

[0011] In some exemplary embodiments, the laser emitting circuit board support frame 205 has an inner optical path reflector mounting hole 209, and the laser emitting assembly 200 further includes: a first inner optical path reflector 203 and a second inner optical path reflector 204, the first inner optical path reflector 203 and the second inner optical path reflector 204 being fixedly mounted on the inner optical path reflector mounting hole 209; the absolute value of the difference between the included angle and 90° between the reflecting surface of the first inner optical path reflector 203 and the reflecting surface of the second inner optical path reflector 204 is less than or equal to a preset threshold.

[0012] In some exemplary embodiments, the stator assembly 400 further includes: a shield 404 soldered to the receiving main control circuit board 405, and a filter 408 mounted in a filter mounting hole on the shield 404.

[0013] In some exemplary embodiments, the light-emitting surface of the light guide post 309 is a spherical or ellipsoidal surface.

[0014] Secondly, embodiments of this application provide a touch system including any of the aforementioned lidar.

[0015] The lidar is used to: scan the area above the display plane of the display device at a preset scanning frame rate to obtain measurement data; after obtaining one frame of measurement data, determine the position information of the touch point on the display device based on the one frame of measurement data, and send the position information of the touch point to the display device or a host connected to the display device; or, after obtaining one frame of measurement data, send one frame of measurement data to the display device or a host connected to the display device; wherein, the measurement data includes light intensity information and distance information of the reflected light returned by the lidar; the measurement data is used to determine the position information of the touch point on the display device.

[0016] The touch system further includes: the display device, configured to receive the position information of the touch point sent by the lidar; or, receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data; or, the touch system further includes: the display device and a host connected to the display device; the host is configured to: receive the position information of the touch point sent by the lidar; or, receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data.

[0017] In some exemplary embodiments, the lidar is further configured to: when scanning the area above the display plane of the display device at a first preset scanning frame rate and detecting the touch point within a first preset time period, switch to scanning the area above the display plane of the display device at a second preset scanning frame rate; wherein the first preset scanning frame rate is less than the second preset scanning frame rate.

[0018] In some exemplary embodiments, the lidar is further configured to: when scanning the area above the display plane of the display device at a second preset scanning frame rate and no touch point is detected within a second preset time period, switch to scanning the area above the display plane of the display device at a first preset scanning frame rate; wherein the first preset scanning frame rate is less than the second preset scanning frame rate.

[0019] In some exemplary embodiments, the second preset scan frame rate is matched with the refresh rate of the display device.

[0020] In some exemplary embodiments, a stylus is also included; the stylus includes: a pen body and a pen tip, and a connecting portion for connecting the pen body and the pen tip; at least a portion of the outer surface of the pen body and the connecting portion has a reflective layer, and the difference between the reflectivity of the reflective layer and n times a first preset threshold is greater than the preset threshold; wherein n is an integer greater than or equal to 0.

[0021] In some exemplary embodiments, the stylus further includes: a pressure sensor built into the pen tip for detecting pressure applied to the pen tip to obtain pressure data, the pressure data being used to determine the touch type on the display device; and a communication module built into the pen barrel for sending the pressure data to the display device or a host connected to the display device; the display device or the host is further configured to: receive the pressure data sent by the stylus, determine the touch type of the stylus on the display device based on the pressure data, and perform touch operations based on the touch type of the stylus on the display device.

[0022] In some exemplary embodiments, the stylus further includes: a pressure sensor embedded in the pen tip for detecting pressure applied to the pen tip to obtain pressure data, the pressure data being used to determine the touch type on the display device; a gravity sensor embedded in the pen barrel for detecting gravity applied to the stylus to obtain gravity data, the pressure data and the gravity data being combined to determine the movement direction of the stylus on the display device; and a communication module embedded in the pen barrel for sending the pressure data and the gravity data to the display device or a host connected to the display device; the display device or the host is further configured to: receive the pressure data and gravity data sent by the stylus, determine the touch type of the stylus on the display device based on the pressure data, determine the movement direction of the stylus on the display device based on the pressure data and the gravity data, and perform a touch operation based on the touch type and the movement direction.

[0023] In some exemplary embodiments, the lidar is disposed at any position around the display device, and the angle between the scanning plane of the lidar and the display plane of the display device is less than or equal to a preset angle, and the radial distance between the scanning plane of the lidar and the display plane of the display device is less than or equal to a second preset threshold; or, the lidar is disposed at any position on a desktop, and the angle between the scanning plane of the lidar and the desktop is less than or equal to a preset angle, and the radial distance between the scanning plane of the lidar and the desktop is less than or equal to a second preset threshold; or, the lidar is disposed on a first wall, the first wall being perpendicular to a second wall, the second wall being the wall on which the display device is disposed.

[0024] The lidar provided in this application uses an optical system where the emitting optical path is achieved using only an emitting reflector and a laser emitting lens, and the receiving optical path is achieved using only a laser receiving lens, a receiving reflector, and a light guide column. The implementation of both the emitting and receiving optical paths is relatively simple. Furthermore, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has a light-focusing effect, improving the light receiving efficiency of the receiving main control circuit, thereby improving the signal-to-noise ratio of the signal received by the receiving main control circuit, simplifying the implementation of the receiving main control circuit, and thus enabling the lidar to achieve touch control functionality.

[0025] The touch control system provided in this application embodiment uses a laser radar with touch control function. The optical system of the laser radar is implemented by only using a transmitting reflector and a laser transmitting lens in the emitting optical path, and only using a laser receiving lens, a receiving reflector and a light guide column in the receiving optical path. The implementation of the emitting optical path and the receiving optical path are relatively simple. In addition, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has the function of focusing light and improving the light receiving efficiency of the receiving main control circuit. This improves the signal-to-noise ratio of the signal received by the receiving main control circuit and simplifies the implementation of the receiving main control circuit, thereby enabling the laser radar to realize the touch control function. Attached Figure Description

[0026] Figure 1 This is a block diagram of an optical system provided in one embodiment of the present application;

[0027] Figure 2 A schematic diagram of the overall assembly of a lidar provided for another embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the component assembly of the lidar according to an embodiment of this application;

[0029] Figure 4 This is an exploded view of the outer casing assembly of the lidar according to an embodiment of this application;

[0030] Figure 5 This is an exploded view of the transmitting component of the lidar according to an embodiment of this application;

[0031] Figure 6 This is an assembly diagram of the transmitting component of the lidar according to an embodiment of this application;

[0032] Figure 7 This is an exploded view of the rotor assembly of the lidar according to an embodiment of this application;

[0033] Figure 8 This is an exploded view of the stator assembly of the lidar according to an embodiment of this application;

[0034] Figure 9 This is an exploded view of the bottom cover assembly of the lidar according to an embodiment of this application;

[0035] Figure 10 This is a schematic diagram of the composition of a touch system provided in another embodiment of this application;

[0036] Figure 11 A schematic diagram illustrating a possible positional relationship between a lidar and a display device provided in an embodiment of this application;

[0037] Figure 12 A schematic diagram illustrating another possible positional relationship between the lidar and the display device provided in an embodiment of this application;

[0038] Figure 13 This is a schematic diagram illustrating another possible positional relationship between the lidar and the display device provided in an embodiment of this application. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions of this application, the lidar and touch system provided in this application will be described in detail below with reference to the accompanying drawings.

[0040] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this application.

[0041] Where there is no conflict, the various embodiments of this application and the features thereof may be combined with each other.

[0042] As used herein, the term “and / or” includes any and all combinations of at least one related enumerated entry.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of at least one other feature, integral, step, operation, element, component, and / or group thereof is not excluded.

[0044] The embodiments described herein can be described with reference to plan views and / or cross-sectional views, using the ideal schematic diagrams of this application. Therefore, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to those shown in the drawings, but include modifications to configurations formed based on manufacturing processes. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown in the figures illustrate specific shapes of areas of an element, but are not intended to be limiting.

[0045] In the description of the embodiments, unless otherwise expressly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above within the scope of this application based on the specific circumstances.

[0046] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this application, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0047] To assist display devices in implementing touch functionality, this application proposes a lidar. Specifically, the lidar proposed in this application is used in conjunction with a display device, or with a host computer connected to the display device, to achieve touch control of the display device.

[0048] The display device in this application embodiment can be any device used for display, including touch display devices and non-touch display devices. For example, monitors, televisions, displays, etc.

[0049] In the case where the display device in the embodiments of this application is a touch display device, the lidar proposed in the embodiments of this application can realize touch control of the touch display device when the touch function of the touch display device fails, or when the touch function of the touch display device is inconvenient to use, or when other needs are required.

[0050] Conventional LiDAR systems have relatively low scanning frame rates, generally lower than the refresh rate of display devices. This makes it difficult to achieve fast response times when directly used to assist display devices in implementing touch functionality, thus reducing the touch experience. This application proposes an optical system that, when applied to LiDAR, can help increase the LiDAR's scanning frame rate, enabling it to match the refresh rate of the display device and thereby improving the touch experience.

[0051] Figure 1 This is a block diagram of an optical system provided in one embodiment of this application.

[0052] Firstly, referring to Figure 1One embodiment of this application provides an optical system, including: a laser for emitting laser light; an emitting reflector for reflecting the laser light; a laser emitting lens for collimating the laser light reflected from the emitting reflector; a laser receiving lens for receiving and converging the laser light collimated by the laser emitting lens and reflected from the surface of an object to be tested; a receiving reflector for reflecting the laser light converged by the laser receiving lens; and a light guide post, the light-emitting surface of which is spherical or ellipsoidal, for transmitting the laser light reflected by the receiving reflector to the light-emitting surface and converging it onto a receiving main control circuit board.

[0053] In some exemplary embodiments, the optical system further includes a filter for filtering the laser output from the light guide post and outputting the filtered laser to the receiving main control circuit board.

[0054] In some exemplary embodiments, the optical system further includes: a first internal optical path reflector for reflecting the laser collimated by the laser emitting lens onto a second internal optical path reflector in a non-measuring state; and a second internal optical path reflector for reflecting the laser reflected by the first internal optical path reflector onto the laser receiving lens.

[0055] In some exemplary embodiments, the angle between the reflecting surface of the first internal optical path reflector and the transmission direction of the laser after collimation by the laser emitting lens is 45°.

[0056] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the reflective surface of the first inner optical path reflector and the transmission direction of the laser after collimation by the laser emitting lens. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflective surface of the first inner optical path reflector and the transmission direction of the laser after collimation by the laser emitting lens and 45° can be less than or equal to a preset threshold.

[0057] In some exemplary embodiments, the angle between the reflecting surface of the first internal optical path mirror and the reflecting surface of the second internal optical path mirror is 90°.

[0058] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 90° angle between the reflective surfaces of the first inner optical path reflector and the second inner optical path reflector. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflective surfaces of the first inner optical path reflector and the second inner optical path reflector and 90° can be less than or equal to a preset threshold.

[0059] In some exemplary embodiments, the angle between the reflecting surface of the second inner optical path reflector and the transmission direction of the laser incident on the laser receiving lens is 45°.

[0060] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the reflecting surface of the second inner optical path reflector and the transmission direction of the laser incident on the laser receiving lens. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflecting surface of the second inner optical path reflector and the transmission direction of the laser incident on the laser receiving lens and 45° can be less than or equal to a preset threshold.

[0061] In some exemplary embodiments, the angle between the emission direction of the laser emitted and the reflecting surface of the emitting mirror is 45°.

[0062] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the laser emission direction and the reflecting surface of the laser reflector. In order to allow for the existence of errors, the absolute value of the difference between the laser emission direction and the reflecting surface of the laser reflector and 45° can be less than or equal to a preset threshold.

[0063] In some exemplary embodiments, the angle between the reflecting surface of the transmitting reflector and the reflecting surface of the receiving reflector is 90°.

[0064] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 90° angle between the reflective surface of the transmitting reflector and the reflective surface of the receiving reflector. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflective surface of the transmitting reflector and the reflective surface of the receiving reflector and 90° can be less than or equal to a preset threshold.

[0065] In some exemplary embodiments, the angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving reflector is 45°.

[0066] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving mirror. In order to allow for the existence of errors, the absolute value of the difference between the angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving mirror and 45° can be less than or equal to a preset threshold.

[0067] In some exemplary embodiments, the radius of the light-emitting surface of the light guide post is equal to the radius of the cross-section of the light guide post.

[0068] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve that the radius of the light-emitting surface of the light guide column is equal to the radius of the cross-section of the light guide column. In order to allow for the existence of errors, the absolute value of the difference between the radius of the light-emitting surface of the light guide column and the radius of the cross-section of the light guide column can be less than or equal to a preset threshold.

[0069] The optical system provided in this application embodiment uses only a transmitting reflector and a laser emitting lens for the emitting optical path, and only a laser receiving lens, a receiving reflector, and a light guide column for the receiving optical path. The implementation of both the emitting and receiving optical paths is relatively simple. Furthermore, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has a light-focusing effect, improving the light receiving efficiency of the receiving main control circuit, thereby improving the signal-to-noise ratio of the signal received by the receiving main control circuit, simplifying the implementation of the receiving main control circuit, and thus laying the foundation for the implementation of touch control in a lidar system incorporating this optical system.

[0070] Secondly, referring to Figure 1 Another embodiment of this application provides a lidar, including any of the optical systems described above; the lidar further includes: a laser emitting circuit for controlling the laser to emit laser light; a motor for controlling the rotation of a rotor; wherein the rotor is provided with an emitting reflector, a laser emitting lens, a laser receiving lens, a receiving reflector, and a light guide column; a receiving main control circuit for receiving the laser light converged by the light guide column or filtered laser light, converting the laser light converged by the light guide column or filtered laser light into measurement data, and after obtaining a frame of the measurement data, determining the position information of a touch point on a display device based on the frame of measurement data, and sending the position information of the touch point to the display device or a host connected to the display device; or, after obtaining a frame of the measurement data, sending a frame of measurement data to the display device or a host connected to the display device; and a USB circuit for supplying power to the receiving main control circuit, the motor, and the laser emitting circuit.

[0071] In some exemplary embodiments, the laser emitting circuit controls the laser to emit laser light at the same frequency as the motor controls the rotor to rotate. That is, for every one rotation of the rotor controlled by the motor, the laser emitting circuit controls the laser to emit laser light once, in order to complete the measurement of a point and obtain the measurement data of that point.

[0072] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the life of the motor bearing. Therefore, in order to extend the life of the motor bearing, the receiving main control circuit is also used to: when the motor controls the rotor to rotate at a first preset scanning frame rate and detects the touch point within a first preset time period, notify or instruct the motor to switch to controlling the rotor to rotate at a second preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0073] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the life of the motor bearing. Therefore, in order to extend the life of the motor bearing, the receiving main control circuit is also used to: when the motor controls the rotor to rotate at a second preset scanning frame rate and no touch point is detected within a second preset time period, notify or instruct the motor to switch to controlling the rotor to rotate at a first preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0074] In some exemplary embodiments, the preset scan frame rate refers to the number of times the LiDAR completes a scan of the entire display device per unit time, or it can refer to the number of frames of measurement data obtained. One frame of measurement data is the measurement data obtained by the LiDAR measuring all points above the display plane of the display device. One measurement data point refers to the measurement data obtained by measuring one point above the display plane of the display device.

[0075] In some exemplary embodiments, the second preset scan frame rate is matched with the refresh rate of the display device.

[0076] In some exemplary embodiments, the second preset scan frame rate is greater than or equal to the refresh rate of the display device.

[0077] In some exemplary embodiments, although the motor and the laser emitting circuit board are not directly electrically connected to the USB circuit board, the motor is indirectly electrically connected to the USB circuit board through the receiving main control circuit board, so that the USB circuit board indirectly supplies power to the motor through the receiving main control circuit board. Similarly, the laser emitting circuit board is indirectly electrically connected to the USB circuit board through the motor and the receiving main control circuit board, so that the USB circuit board indirectly supplies power to the laser emitting circuit board through the receiving main control circuit board and the motor.

[0078] The lidar provided in this application uses an optical system where the emitting optical path is achieved using only an emitting reflector and a laser emitting lens, and the receiving optical path is achieved using only a laser receiving lens, a receiving reflector, and a light guide column. The implementation of both the emitting and receiving optical paths is relatively simple. Furthermore, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has a light-focusing effect, improving the light receiving efficiency of the receiving main control circuit, thereby improving the signal-to-noise ratio of the signal received by the receiving main control circuit, simplifying the implementation of the receiving main control circuit, and thus enabling the lidar to achieve touch control functionality.

[0079] Figure 2 A schematic diagram of the overall assembly of a lidar provided for another embodiment of this application; Figure 3 This is a schematic diagram of the assembly of the lidar components according to an embodiment of this application.

[0080] Thirdly, referring to Figure 2 and Figure 3 Another embodiment of this application provides a lidar, including: an outer casing assembly 100, a laser emitting assembly 200, a rotor assembly 300, a stator assembly 400, and a bottom cover assembly 500.

[0081] In some exemplary embodiments, such as Figure 4 As shown, the outer casing assembly 100 includes: a housing 102, which has a power interface through hole 103 and a USB interface through hole 104.

[0082] In some exemplary embodiments, the outer casing assembly 100 also includes a transmission shield 101, which is fixedly connected to the outer casing 102.

[0083] In some exemplary embodiments, such as Figure 3 and Figure 4 As shown, the transmission cover 101 may have a transmission window for transmitting laser light collimated from the laser emitting lens 306.

[0084] In some exemplary embodiments, the fixed connection between the transmission shield 101 and the housing 102 can be a conventional fixed connection method used by those skilled in the art. For example, as Figure 4 As shown, the transmission cover 101 has a first screw through hole 105, and the outer shell 102 has a first mounting screw hole (not shown in the figure). The transmission cover 101 and the outer shell 102 can be fixedly connected by the first mounting screw 107 through the first screw through hole 105 and the first mounting screw hole.

[0085] In some exemplary embodiments, the housing 102 has a first mounting nut 106 built in for securing the stator assembly 400.

[0086] In some exemplary embodiments, such as Figure 5 and Figure 6 As shown, the laser emitting assembly 200 includes: a laser emitting circuit board 201, a laser 202 mounted on the laser emitting circuit board 201, and a laser emitting circuit board support frame 205. The laser 202 and the laser emitting circuit board 201 are electrically connected, the laser emitting circuit board 201 and the laser emitting circuit board support frame 205 are fixedly connected, and the laser emitting circuit board support frame 205 is fixedly connected to the motor stator 402 in the stator assembly 400.

[0087] In some exemplary embodiments, the laser emitting circuit board 201 has a laser emitting circuit for controlling the laser 202 to emit laser light.

[0088] In some exemplary embodiments, the frequency at which the laser emitting circuit controls the laser 202 to emit laser light can be the same as the frequency at which the motor controls the rotor 301 to rotate. That is, when the motor controls the rotor 301 to rotate once, the laser emitting circuit must control the laser 202 to emit laser light once in order to complete the measurement of a point and obtain the measurement data of that point.

[0089] In some exemplary embodiments, the laser emitting circuit board support 205 has a laser emitting circuit board mounting hole, and the laser emitting circuit board 201 is fixedly mounted in the laser emitting circuit board mounting hole.

[0090] In some exemplary embodiments, the fixed connection between the laser emitting circuit board support 205 and the motor stator 402 in the stator assembly 400 can be a fixed connection method commonly used by those skilled in the art. For example, as Figure 5 As shown, the laser emitting circuit board support frame 205 has a second screw through hole 206, and the motor stator 402 has a second mounting screw hole (not shown in the figure). The laser emitting circuit board support frame 205 and the motor stator 402 can be fixedly connected by a second mounting screw 207 through the second screw through hole 206 and the second mounting screw hole.

[0091] In some exemplary embodiments, the laser emitting circuit on the laser emitting circuit board support 205 has a first ribbon cable 208 for realizing the electrical connection between the laser emitting circuit and the second ribbon cable interface 409 of the motor reader board 403.

[0092] In some exemplary embodiments, such as Figure 6As shown, the laser emitting circuit board support frame 205 has an inner optical path reflector mounting hole 209. The laser emitting assembly 200 also includes a first inner optical path reflector 203 and a second inner optical path reflector 204. The first inner optical path reflector 203 and the second inner optical path reflector 204 are fixedly mounted on the inner optical path reflector mounting hole 209. The absolute value of the difference between the angle between the reflecting surface of the first inner optical path reflector 203 and the reflecting surface of the second inner optical path reflector 204 and 90° is less than or equal to a preset threshold.

[0093] In some exemplary embodiments, the first internal optical path reflector 203 is used to reflect the laser collimated by the laser emitting lens 306 onto the second internal optical path reflector 204 in a non-measurement state; the second internal optical path reflector 204 is used to reflect the laser reflected by the first internal optical path reflector 203 onto the laser receiving lens 307.

[0094] In some exemplary embodiments, the angle between the reflecting surface of the first internal optical path reflector 203 and the transmission direction of the laser after collimation by the laser emitting lens 306 is 45°.

[0095] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the reflecting surface of the first inner optical path reflector 203 and the transmission direction of the laser after collimation by the laser emitting lens 306. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflecting surface of the first inner optical path reflector 203 and the transmission direction of the laser after collimation by the laser emitting lens 306 and 45° can be less than or equal to a preset threshold.

[0096] In some exemplary embodiments, the angle between the reflecting surface of the first inner optical path reflector 203 and the reflecting surface of the second inner optical path reflector 204 is 90°.

[0097] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 90° angle between the reflective surface of the first inner optical path reflector 203 and the reflective surface of the second inner optical path reflector 204. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflective surface of the first inner optical path reflector 203 and the reflective surface of the second inner optical path reflector 204 and 90° can be less than or equal to a preset threshold.

[0098] In some exemplary embodiments, the angle between the reflecting surface of the second internal optical path reflector 204 and the transmission direction of the laser incident on the laser receiving lens 307 is 45°.

[0099] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the reflecting surface of the second inner optical path reflector 204 and the transmission direction of the laser incident on the laser receiving lens 307. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflecting surface of the second inner optical path reflector 204 and the transmission direction of the laser incident on the laser receiving lens 307 and 45° can be less than or equal to a preset threshold.

[0100] In some exemplary embodiments, the first inner optical path reflector 203 and the second inner optical path reflector 204 can be fixedly mounted on the inner optical path reflector mounting hole 209 by means of adhesive bonding.

[0101] In some exemplary embodiments, during the measurement state, the transmission window of the transmission cover 101 faces the laser emitting lens 306 and the laser receiving lens 307, so that the laser collimated by the laser emitting lens 306 can be transmitted through the transmission window, and the laser reflected from the surface of the object to be measured can also be incident on the laser receiving lens 307 through the transmission window.

[0102] In some exemplary embodiments, such as Figure 7 As shown, the rotor assembly 300 includes: a rotor 301, a emitting reflector bracket 302 fixedly connected to the rotor 301, a emitting reflector 303 mounted on the emitting reflector bracket 302, a receiving reflector bracket 304 mounted in a reflector bracket mounting hole 314 on the rotor 301, a receiving reflector 305 mounted on the receiving reflector bracket 304, a laser emitting lens 306 mounted in a laser emitting lens mounting hole 315 on the rotor 301, a laser receiving lens 307 mounted in a laser receiving lens mounting hole 316 on the rotor 301, a rotating shaft 308 mounted at the center of the rotor 301, a light guide column 309 mounted in the rotating shaft 308, and a motor rotor 310 mounted in the rotor 301.

[0103] In some exemplary embodiments, the fixed connection between the rotor 301 and the emitting reflector bracket 302 can be a fixed connection method well known to those skilled in the art. For example, as Figure 7 As shown, the rotor 301 has a third mounting screw hole 318, and the emitting reflector 302 has a third screw through hole 312. The third mounting screw 319 can fix the rotor 301 and the emitting reflector bracket 302 through the third screw through hole 312 and the third mounting screw hole 318.

[0104] In some exemplary embodiments, in order to adjust the tilt angle of the emitting reflector bracket 302, a shim 320 can be added under the third mounting screw 319. In this way, the tilt angle of the emitting reflector bracket 302 can be adjusted by the four third mounting screws 319, thereby achieving accurate installation of the emitting reflector bracket 302.

[0105] In some exemplary embodiments, the emitting reflector bracket 302 has an emitting reflector mounting hole 311, and the emitting reflector 303 can be installed in the emitting reflector mounting hole 311 of the emitting reflector bracket 302.

[0106] In some exemplary embodiments, the emitting reflector 303 may be installed in the emitting reflector mounting hole 311 of the emitting reflector bracket 302 by means of adhesive bonding.

[0107] In some exemplary embodiments, the rotor 301 has a mirror bracket mounting hole 314, the shape of which matches the shape of the receiving mirror bracket 304, which is mounted in the mirror bracket mounting hole 314.

[0108] In some exemplary embodiments, the fixed connection between the receiving reflector bracket 304 and the rotor 301 can be a fixed connection method well known to those skilled in the art. For example, such as Figure 7 As shown, the rotor 301 has a fourth mounting screw hole 317, the transmitting reflector bracket 302 has a fourth screw through hole 313, and the receiving reflector bracket 304 has a fifth screw through hole (not marked in the figure). The receiving reflector bracket 304 and the rotor 301 can be fixedly connected by the fourth mounting screw 321 through the fourth screw through hole 313, the fifth screw through hole and the fourth mounting screw hole 317.

[0109] In some exemplary embodiments, the receiver mirror bracket 304 has a receiver mirror mounting hole (not shown in the figure), and the receiver mirror 305 can be installed in the receiver mirror mounting hole of the receiver mirror bracket 304.

[0110] In some exemplary embodiments, the receiving reflector 305 may be installed in the receiving reflector mounting hole of the receiving reflector bracket 304 by means of adhesive bonding.

[0111] In some exemplary embodiments, the rotor 301 has a laser emitting lens mounting hole 315, and the laser emitting lens 306 can be mounted in the laser emitting lens mounting hole 315 on the rotor 301.

[0112] In some exemplary embodiments, the laser emitting lens 306 may be mounted in the laser emitting lens mounting hole 315 on the rotor 301 by means of adhesive bonding.

[0113] In some exemplary embodiments, the rotor 301 has a laser receiving lens mounting hole 316, and the laser receiving lens 307 can be mounted in the laser receiving lens mounting hole 316 on the rotor 301.

[0114] In some exemplary embodiments, the laser receiving lens 307 may be mounted in the laser receiving lens mounting hole 316 on the rotor 301 by means of adhesive bonding.

[0115] In some exemplary embodiments, the motor rotor 310 includes a multipole magnetic ring and a sheet metal part, with the multipole magnetic ring fitted inside the sheet metal part.

[0116] In some exemplary embodiments, the light-emitting surface of the light guide post 309 is a spherical or ellipsoidal surface.

[0117] In some exemplary embodiments, the radius of the light-emitting surface of the light guide post is equal to the radius of the cross-section of the light guide post.

[0118] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve that the radius of the light-emitting surface of the light guide column is equal to the radius of the cross-section of the light guide column. In order to allow for the existence of errors, the absolute value of the difference between the radius of the light-emitting surface of the light guide column and the radius of the cross-section of the light guide column can be less than or equal to a preset threshold.

[0119] In this embodiment, the laser emitted by the laser 202 is reflected by the emitting reflector 303 and then collimated by the laser emitting lens 306. The collimated laser then irradiates the surface of the object to be tested. The laser reflected from the surface of the object to be tested is focused by the laser receiving lens 307 and then reflected by the receiving reflector 305. The reflected laser is incident on the light guide column 309 and transmitted in the light guide column 309. After being focused by the light emitting surface of the light guide column 309, it is incident on the receiving main control circuit board 405.

[0120] In some exemplary embodiments, the angle between the emission direction of the laser emitted and the reflecting surface of the emitting mirror is 45°.

[0121] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the laser emission direction and the reflecting surface of the laser reflector. In order to allow for the existence of errors, the absolute value of the difference between the laser emission direction and the reflecting surface of the laser reflector and 45° can be less than or equal to a preset threshold.

[0122] In some exemplary embodiments, the angle between the reflecting surface of the transmitting reflector and the reflecting surface of the receiving reflector is 90°.

[0123] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 90° angle between the reflective surface of the transmitting reflector and the reflective surface of the receiving reflector. In order to allow for the existence of errors, the absolute value of the difference between the angle between the reflective surface of the transmitting reflector and the reflective surface of the receiving reflector and 90° can be less than or equal to a preset threshold.

[0124] In some exemplary embodiments, the angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving reflector is 45°.

[0125] In some exemplary embodiments, due to actual assembly errors, processing errors, etc., it is difficult to achieve a 45° angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving mirror. In order to allow for the existence of errors, the absolute value of the difference between the angle between the transmission direction of the laser focused by the laser receiving lens and the reflecting surface of the receiving mirror and 45° can be less than or equal to a preset threshold.

[0126] In some exemplary embodiments, such as Figure 8 As shown, the stator assembly 400 includes: a motor stator assembly and a receiving main control circuit board 405 fixedly connected to the motor stator assembly; the motor stator assembly and the receiving main control circuit board 405 are electrically connected, and the motor stator assembly and the laser emitting circuit board 201 are electrically connected.

[0127] In some exemplary embodiments, such as Figure 8 As shown, the motor stator assembly includes: a motor core and a motor core coil 401, a motor stator 402, a motor head plate 403, a gap shim 406, and a retaining ring 407. The connection methods between the various components of the motor stator assembly are the connection methods between the various components of a motor that are well known to those skilled in the art, and will not be described in detail here.

[0128] In some exemplary embodiments, the motor reader plate 403 and the motor stator 402 may be fixedly connected by a fifth mounting screw 415.

[0129] In some exemplary embodiments, such as Figure 8 As shown, the motor reader board 403 has a second ribbon cable interface 409, which is electrically connected to the first ribbon cable 208 on the laser emitting circuit.

[0130] In some exemplary embodiments, such as Figure 8 As shown, the motor reader board 403 has a third ribbon cable interface 410 and a second ribbon cable 411 electrically connected to the third ribbon cable interface 410. The second ribbon cable 411 is electrically connected to the fourth ribbon cable interface 412 on the receiving main control circuit board 405.

[0131] In some exemplary embodiments, such as Figure 8 As shown, the receiving main control circuit board 405 has a fourth ribbon cable interface 412.

[0132] In some exemplary embodiments, such as Figure 8 As shown, the receiving main control circuit board 405 has a fifth ribbon cable interface 413 and a fourth ribbon cable 414 electrically connected to the fifth ribbon cable interface 413. The fourth ribbon cable 414 is electrically connected to the first ribbon cable interface 502 on the USB circuit board 501.

[0133] In some exemplary embodiments, such as Figure 8 As shown, the motor reader board 403 and the receiving main control circuit board 405 are fixedly connected.

[0134] In some exemplary embodiments, the fixed connection between the motor reader board 403 and the receiving main control circuit board 405 can be a fixed connection method well known to those skilled in the art. For example, the motor reader board 403 and the receiving main control circuit board 405 can be fixedly connected using a sixth mounting screw 416.

[0135] In some exemplary embodiments, such as Figure 8 As shown, the stator assembly 400 also includes: a shield 404 soldered on the receiving main control circuit board 405, and a filter 408 installed in the filter mounting hole on the shield 404.

[0136] In some exemplary embodiments, the filter 408 is used to filter the laser output from the light guide column and output the filtered laser to the receiving main control circuit board 405.

[0137] In some exemplary embodiments, the shielding lens 404 has a filter mounting hole (not shown in the figure), and the filter 408 can be mounted in the filter mounting hole by means of adhesive bonding.

[0138] In some exemplary embodiments, the receiving master control circuit board 405 has a receiving master control circuit.

[0139] In some exemplary embodiments, such as Figure 9 As shown, the bottom cover assembly 500 includes: a USB circuit board 501, a first ribbon cable interface 503 soldered on the USB circuit board 501, a power interface 504, a USB connector 505, and a bottom cover 502 fixedly connected to the USB circuit board 501; receiving the main control circuit board 405 and the first ribbon cable interface 503 on the USB circuit board 501 are electrically connected.

[0140] In some exemplary embodiments, the position of the USB connector 505 on the USB circuit board 501 matches the position of the USB interface through-hole 104 on the housing 102, so that the USB connector 505 can be electrically connected to an external USB cable through the USB interface through-hole 104.

[0141] In some exemplary embodiments, the position of the power interface 504 on the USB circuit board 501 matches the position of the power interface through hole 103 on the housing, so that the power interface 504 can be electrically connected to the power source through the power interface through hole 103.

[0142] In some exemplary embodiments, the fixing connection between the USB circuit board 501 and the bottom cover 502 can be a fixing connection method well known to those skilled in the art. For example, the USB circuit board 501 has a sixth screw through hole 507, and the bottom cover 502 has a fifth mounting screw hole 509. The USB circuit board 501 and the bottom cover 502 can be fixedly connected by a seventh mounting screw 511 through the sixth screw through hole 507 and the fifth mounting screw hole 509.

[0143] In some exemplary embodiments, the USB circuit board 501 has a positioning post through hole 508, and the bottom cover 502 has a positioning post 510. The positioning installation between the USB circuit board 501 and the bottom cover 502 can be achieved through the positioning post through hole 508 on the USB circuit board 501 and the positioning post 510 on the bottom cover 502.

[0144] In some exemplary embodiments, the bottom cover 502 and the outer casing 102 are fixedly connected.

[0145] In some exemplary embodiments, the fixing connection between the bottom cover 502 and the outer casing 102 can be a fixing connection method well known to those skilled in the art. For example, such as Figure 9 As shown, the outer casing 102 has a seventh screw through hole (not marked in the figure), and the bottom cover 502 has a sixth mounting screw hole (not marked in the figure). The bottom cover 502 and the outer casing 102 can be fixedly connected by an eighth mounting screw 512 through the seventh screw through hole and the sixth mounting screw hole.

[0146] In some exemplary embodiments, the bottom cover 502 has a built-in second mounting nut 513 for fixing the lidar.

[0147] In some exemplary embodiments, the USB circuit board 501 has USB circuitry.

[0148] In this embodiment, the motor is used to control the rotation of the rotor 301; the receiving main control circuit is used to receive the laser or filtered laser converged by the light guide column 309, convert the laser or filtered laser converged by the light guide column 309 into measurement data, and after obtaining a frame of the measurement data, determine the position information of the touch point on the display device based on the frame of measurement data, and send the position information of the touch point to the display device or a host connected to the display device; or, after obtaining a frame of the measurement data, send a frame of measurement data to the display device or a host connected to the display device; the USB circuit is used to power the receiving main control circuit, the motor and the laser emitting circuit.

[0149] In some exemplary embodiments, the laser emitting circuit controls the laser to emit laser light at the same frequency as the motor controls the rotor to rotate. That is, for every one rotation of the rotor controlled by the motor, the laser emitting circuit controls the laser to emit laser light once, in order to complete the measurement of a point and obtain the measurement data of that point.

[0150] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the life of the motor bearing. Therefore, in order to extend the life of the motor bearing, the receiving main control circuit is also used to: when the motor controls the rotor to rotate at a first preset scanning frame rate and detects the touch point within a first preset time period, notify or instruct the motor to switch to controlling the rotor to rotate at a second preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0151] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the life of the motor bearing. Therefore, in order to extend the life of the motor bearing, the receiving main control circuit is also used to: when the motor controls the rotor to rotate at a second preset scanning frame rate and no touch point is detected within a second preset time period, notify or instruct the motor to switch to controlling the rotor to rotate at a first preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0152] In some exemplary embodiments, the preset scan frame rate refers to the number of times the LiDAR completes a scan of the entire display device per unit time, or it can refer to the number of frames of measurement data obtained. One frame of measurement data is the measurement data corresponding to all points above the display plane of the display device obtained by the LiDAR in one scan. One measurement data refers to the measurement data obtained by measuring one point above the display plane of the display device.

[0153] In some exemplary embodiments, the second preset scan frame rate is matched with the refresh rate of the display device.

[0154] In some exemplary embodiments, the second preset scan frame rate is greater than or equal to the refresh rate of the display device.

[0155] In some exemplary embodiments, although the motor and the laser emitting circuit board are not directly electrically connected to the USB circuit board, the motor is indirectly electrically connected to the USB circuit board through the receiving main control circuit board, so that the USB circuit board indirectly supplies power to the motor through the receiving main control circuit board. Similarly, the laser emitting circuit board is indirectly electrically connected to the USB circuit board through the motor and the receiving main control circuit board, so that the USB circuit board indirectly supplies power to the laser emitting circuit board through the receiving main control circuit board and the motor.

[0156] The lidar provided in this application uses an optical system where the emitting optical path is achieved using only an emitting reflector and a laser emitting lens, and the receiving optical path is achieved using only a laser receiving lens, a receiving reflector, and a light guide column. The implementation of both the emitting and receiving optical paths is relatively simple. Furthermore, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has a light-focusing effect, improving the light receiving efficiency of the receiving main control circuit, thereby improving the signal-to-noise ratio of the signal received by the receiving main control circuit, simplifying the implementation of the receiving main control circuit, and thus enabling the lidar to achieve touch control functionality.

[0157] Figure 10 This is a schematic diagram of the composition of a touch system provided in another embodiment of this application.

[0158] Fourthly, refer to Figure 10 Another embodiment of this application provides a touch control system including any of the aforementioned lidar; the lidar is used to: scan above the display plane of a display device at a preset scanning frame rate to obtain measurement data; after obtaining a frame of the measurement data, determine the position information of a touch point on the display device based on the frame of measurement data, and send the position information of the touch point to the display device or a host connected to the display device; or, after obtaining a frame of measurement data, send a frame of measurement data to the display device or a host connected to the display device; wherein, the measurement data includes light intensity information and distance information of the reflected light returned by the lidar; the measurement data is used to determine the position information of the touch point on the display device.

[0159] The touch system further includes: the display device, configured to receive the position information of the touch point sent by the lidar; or, receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data; or, the touch system further includes: the display device and a host connected to the display device; the host is configured to: receive the position information of the touch point sent by the lidar; or, receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data.

[0160] In some exemplary embodiments, the measurement data includes light intensity information and distance information of the reflected light returned by the lidar.

[0161] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the lifespan of the motor bearing. Therefore, in order to extend the lifespan of the motor bearing, the lidar is further configured to: when scanning the area above the display plane of the display device at a first preset scanning frame rate and detecting the touch point within a first preset time period, switch to scanning the area above the display plane of the display device at a second preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0162] In some exemplary embodiments, for a lidar to be able to perform touch control on a display device, it needs a scanning frame rate that matches the refresh rate of the display device. However, since the refresh rate of the display device is high, if the lidar maintains a high scanning frame rate for a long time, it will shorten the lifespan of the motor bearing. Therefore, in order to extend the lifespan of the motor bearing, the lidar is further configured to: when scanning the area above the display plane of the display device at a second preset scanning frame rate and no touch point is detected within a second preset time period, switch to scanning the area above the display plane of the display device at a first preset scanning frame rate; wherein, the first preset scanning frame rate is less than the second preset scanning frame rate.

[0163] In some exemplary embodiments, the preset scan frame rate refers to the number of times the LiDAR completes a scan of the entire display device per unit time, or it can refer to the number of frames of measurement data obtained. One frame of measurement data is the measurement data corresponding to all points above the display plane of the display device obtained by the LiDAR in one scan. One measurement data refers to the measurement data obtained by measuring one point above the display plane of the display device.

[0164] In some exemplary embodiments, the second preset scan frame rate is matched with the refresh rate of the display device.

[0165] In some exemplary embodiments, the second preset scan frame rate is greater than or equal to the refresh rate of the display device.

[0166] In some exemplary embodiments, a stylus is also included; the stylus includes: a pen body and a pen tip, and a connecting portion for connecting the pen body and the pen tip; at least a portion of the outer surface of the pen body and the connecting portion has a reflective layer, and the difference between the reflectivity of the reflective layer and n times a first preset threshold is greater than the preset threshold; wherein n is an integer greater than or equal to 0.

[0167] In some exemplary embodiments, the first preset threshold is determined based on the ambient light intensity of the application scenario. For example, in a meeting scenario, the first preset threshold when the lights are off can be set lower than the first preset threshold when the lights are on.

[0168] In some exemplary embodiments, the first preset threshold is determined based on the reflectivity of objects in the application scenario. For example, in a meeting scenario, the first preset threshold can be determined based on the reflectivity of objects such as tables, chairs, computers, and walls in the meeting room, such as the average reflectivity of all objects in the meeting room.

[0169] In some exemplary embodiments, the first preset threshold is determined based on the reflectance of common objects in daily life. For example, the first preset threshold can be determined based on the reflectance of objects such as tables, chairs, walls, and notebooks in daily life, such as the average reflectance of all common objects in daily life.

[0170] In some exemplary embodiments, the first preset threshold is determined based on the reflectivity of the finger. For example, the first preset threshold may be the reflectivity of the finger.

[0171] In some exemplary embodiments, the reflective layer includes at least one of glass microspheres, microprisms, reflective stickers, and anti-reflective coatings. For example, to improve reflectivity, the principle of retroreflection can be employed, such as using at least one of glass microspheres or microprisms to achieve retroreflection, thereby improving reflectivity. As another example, to improve reflectivity, at least one of reflective stickers and anti-reflective coatings can be used.

[0172] In some exemplary embodiments, the entire outer surface of the connector has a reflective layer, and a portion of the outer surface of the pen barrel near the connector has a reflective layer.

[0173] In some exemplary embodiments, the pen tip is made of a soft material. For example, materials such as foam or cotton may be used.

[0174] In some exemplary embodiments, the stylus further includes: a pressure sensor built into the pen tip for detecting pressure applied to the pen tip to obtain pressure data, the pressure data being used to determine the touch type on the display device; and a communication module built into the pen barrel for sending the pressure data to the display device or a host connected to the display device; the display device or the host is further configured to: receive the pressure data sent by the stylus, determine the touch type of the stylus on the display device based on the pressure data, and perform touch operations based on the touch type of the stylus on the display device.

[0175] In some exemplary embodiments, the stylus further includes: a pressure sensor embedded in the pen tip for detecting pressure applied to the pen tip to obtain pressure data, the pressure data being used to determine the touch type on the display device; a gravity sensor embedded in the pen barrel for detecting gravity applied to the stylus to obtain gravity data, the pressure data and the gravity data being combined to determine the movement direction of the stylus on the display device; and a communication module embedded in the pen barrel for sending the pressure data and the gravity data to the display device or a host connected to the display device; the display device or the host is further configured to: receive the pressure data and gravity data sent by the stylus, determine the touch type of the stylus on the display device based on the pressure data, determine the movement direction of the stylus on the display device based on the pressure data and the gravity data, and perform a touch operation based on the touch type and the movement direction.

[0176] In some exemplary embodiments, the touch type can be any one of handwriting operation, drawing graphics operation, or touch operation.

[0177] In some exemplary embodiments, the touch operation can be any one of a click, a double click, or a gesture operation.

[0178] In some exemplary embodiments, determining the touch type of the stylus on the display device based on pressure data includes: determining the touch type as a handwriting operation when the pressure on the stylus tip 1 is determined to be within a first pressure range based on pressure data; determining the touch type as a drawing operation when the pressure on the stylus tip 1 is determined to be within a second pressure range based on pressure data; and determining the touch type as a touch operation when the pressure on the stylus tip 1 is determined to be within a third pressure range based on pressure data.

[0179] In some exemplary embodiments, any pressure value in the first pressure range may be less than any pressure value in the second pressure range and any pressure value in the third pressure range.

[0180] In some exemplary embodiments, any pressure value within the second pressure range may be less than any pressure value within the third pressure range.

[0181] In some exemplary embodiments, if it is determined from pressure data that the pressure on the tip 1 of the stylus is within a third pressure range, and only one pressure data is detected within a preset time, the touch type is determined to be a click operation.

[0182] In some exemplary embodiments, if it is determined from pressure data that the pressure on the tip 1 of the stylus is within a third pressure range, and only two pressure data points are detected within a preset time, the touch type is determined to be a double-click operation.

[0183] In some exemplary embodiments, if it is determined from pressure data that the pressure on the tip 1 of the stylus is within a third pressure range, and at least three pressure data points are detected within a preset time, the touch type is determined to be a gesture operation.

[0184] In some exemplary embodiments, the display device or host is also used to: adjust the thickness of the lines slid by the stylus on the display device according to the touch type.

[0185] In some exemplary embodiments, adjusting the thickness of the lines slid by the stylus on the display device according to the touch type includes: determining the line thickness as a first thickness level when the touch type is a handwriting operation; and determining the line thickness as a second thickness level when the touch type is a drawing operation.

[0186] In some exemplary embodiments, the lines in the first thickness level are thinner than the lines in the second thickness level.

[0187] In some exemplary embodiments, the gravity data includes three-axis acceleration information of the stylus.

[0188] In some exemplary embodiments, determining the movement direction of the stylus on the display device based on pressure data and gravity data includes: determining acceleration information corresponding to the pressure received by the stylus based on the pressure data; determining the attitude information of the stylus relative to the ground based on the acceleration information corresponding to the pressure received by the stylus and the three-axis acceleration information, wherein the attitude information includes pitch angle information, yaw angle information and roll angle information; and determining the movement direction of the stylus on the display device based on the attitude information of the stylus relative to the ground.

[0189] In some exemplary embodiments, the direction of the acceleration corresponding to the pressure applied to the stylus can be parallel to the pen barrel and point from the pen tip 1 to the pen barrel 2.

[0190] In some exemplary embodiments, the magnitude of the acceleration corresponding to the pressure applied to the stylus can be the ratio of the pressure applied to the stylus to the mass of the stylus.

[0191] In some exemplary embodiments, the display device can be any device used for display. The display device can refer to a touch display device or a non-touch display device. Examples include monitors, televisions, and displays.

[0192] In the case where the display device in the embodiments of this application is a touch display device, the lidar proposed in the embodiments of this application can realize touch control of the touch display device when the touch function of the touch display device fails, or when the touch function of the touch display device is inconvenient to use, or when other needs are required.

[0193] In some exemplary embodiments, such as Figure 11 As shown, the lidar is positioned arbitrarily around the display device, with its scanning plane parallel to the display plane of the device, and the radial distance between the lidar's scanning plane and the display plane being less than or equal to a second preset threshold. Figure 11 The gray area shown is the area where the lidar can be placed.

[0194] In some exemplary embodiments, due to the presence of errors, it is difficult to achieve perfect parallelism between the scanning plane of the lidar and the display plane of the display device. To allow for the presence of errors, such as... Figure 11 As shown, the lidar is positioned at any location around the display device, and the angle between the lidar's scanning plane and the display device's display plane is less than or equal to a preset angle, and the radial distance between the lidar's scanning plane and the display device's display plane is less than or equal to a second preset threshold. Figure 11 The gray area shown is the area where the lidar can be placed.

[0195] In some exemplary embodiments, such as Figure 12 As shown, the lidar is set at any position on the desktop, and the scanning plane of the lidar is parallel to the desktop, and the radial distance between the scanning plane of the lidar and the desktop is less than or equal to a second preset threshold.

[0196] In some exemplary embodiments, due to the presence of errors, it is difficult to achieve perfect parallelism between the scanning plane of the lidar and the desktop. To allow for the presence of errors, such as... Figure 12As shown, the lidar is set at any position on the desktop, and the angle between the scanning plane of the lidar and the desktop is less than or equal to a preset angle, and the radial distance between the scanning plane of the lidar and the desktop is less than or equal to a second preset threshold.

[0197] In some exemplary embodiments, the lidar is disposed on a first wall, the first wall being perpendicular to a second wall, the second wall being the wall on which the display device is mounted. Figure 13 As shown, the lidar can be mounted on the ceiling, and the display device can be mounted on a wall perpendicular to the ceiling. Alternatively, the lidar and the display device can both be mounted on a wall perpendicular to the ceiling, with the wall containing the lidar and the wall containing the display device being perpendicular to each other.

[0198] The touch control system provided in this application embodiment uses a laser radar with touch control function. The optical system of the laser radar is implemented by only using a transmitting reflector and a laser transmitting lens in the emitting optical path, and only using a laser receiving lens, a receiving reflector and a light guide column in the receiving optical path. The implementation of the emitting optical path and the receiving optical path are relatively simple. In addition, the light-emitting surface of the light guide column is a spherical or ellipsoidal surface, which has the function of focusing light and improving the light receiving efficiency of the receiving main control circuit. This improves the signal-to-noise ratio of the signal received by the receiving main control circuit and simplifies the implementation of the receiving main control circuit, thereby enabling the laser radar to realize the touch control function.

[0199] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0200] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for illustrative purposes only and should be construed as such, and is not intended to be limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in connection with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in connection with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this application as set forth by the appended claims.

Claims

1. A lidar, comprising: include: The outer casing assembly (100), the laser emitting assembly (200), the rotor assembly (300), the stator assembly (400), and the bottom cover assembly (500). The outer casing assembly (100) includes: a housing (102) having a power interface through hole (103) and a USB interface through hole (104). The laser emitting assembly (200) includes: a laser emitting circuit board (201), a laser (202) mounted on the laser emitting circuit board (201), and a laser emitting circuit board support frame (205). The laser (202) and the laser emitting circuit board (201) are electrically connected. The laser emitting circuit board (201) and the laser emitting circuit board support frame (205) are fixedly connected. The laser emitting circuit board support frame (205) and the motor stator (402) in the stator assembly (400) are fixedly connected. The rotor assembly (300) includes: a rotor (301), a emitting reflector bracket (302) fixedly connected to the rotor (301), a emitting reflector (303) mounted on the emitting reflector bracket (302), a receiving reflector bracket (304) mounted in a reflector bracket mounting hole (314) on the rotor (301), a receiving reflector (305) mounted on the receiving reflector bracket (304), a laser emitting lens (306) mounted in a laser emitting lens mounting hole (315) on the rotor (301), a laser receiving lens (307) mounted in a laser receiving lens mounting hole (316) on the rotor (301), a rotating shaft (308) mounted at the center of the rotor (301), a light guide column (309) mounted in the rotating shaft (308), and a motor rotor (310) mounted in the rotor (301). The stator assembly (400) includes: a motor stator assembly and a receiving main control circuit board (405) fixedly connected to the motor stator assembly; the motor stator assembly and the receiving main control circuit board (405) are electrically connected, and the motor stator assembly and the laser emitting circuit board (201) are electrically connected. The bottom cover assembly (500) includes: a USB circuit board (501), a first ribbon cable interface (503), a power interface (504), and a USB connector (505) soldered on the USB circuit board (501), and a bottom cover (502) fixedly connected to the USB circuit board (501); the receiving main control circuit board (405) and the first ribbon cable interface (503) on the USB circuit board (501) are electrically connected.

2. The lidar of claim 1, wherein, The outer cover assembly (100) also includes a transmission cover (101), which is fixedly connected to the outer shell (102).

3. The lidar of claim 1, wherein, The laser emitting circuit board support frame (205) has an inner optical path reflector mounting hole (209), and the laser emitting assembly (200) further includes: a first inner optical path reflector (203) and a second inner optical path reflector (204), the first inner optical path reflector (203) and the second inner optical path reflector (204) being fixedly mounted on the inner optical path reflector mounting hole (209); The absolute value of the difference between the angle between the reflecting surface of the first internal optical path reflector (203) and the reflecting surface of the second internal optical path reflector (204) and 90° is less than or equal to a preset threshold.

4. The lidar of any one of claims 1-3, wherein, The stator assembly (400) further includes: a shield (404) soldered to the receiving main control circuit board (405), and a filter (408) installed in a filter mounting hole on the shield (404).

5. The lidar of any of claims 1-3, wherein, The light-emitting surface of the light guide column (309) is a spherical or ellipsoidal surface.

6. A touch system, comprising: Including the lidar as described in any one of claims 1-5; The lidar is used to: scan the area above the display plane of the display device at a preset scanning frame rate to obtain measurement data; after obtaining one frame of measurement data, determine the position information of a touch point on the display device based on the one frame of measurement data, and send the position information of the touch point to the display device or a host connected to the display device; or, after obtaining one frame of measurement data, send one frame of measurement data to the display device or a host connected to the display device; wherein, the measurement data includes light intensity information and distance information of the reflected light returned by the lidar; the measurement data is used to determine the position information of the touch point on the display device; The touch system further includes: the display device, configured to receive the position information of the touch point sent by the lidar; or, to receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data; Alternatively, the touch system may further include: the display device and a host connected to the display device; the host is configured to: receive the position information of the touch point sent by the lidar; or, receive a frame of measurement data sent by the lidar, and determine the position information of the touch point on the display device based on the frame of measurement data. 7.The touch system according to claim 6, characterized in that, The lidar is also used for: When scanning the display plane of the display device at a first preset scanning frame rate and detecting the touch point within a first preset time period, the system switches to scanning the display plane of the display device at a second preset scanning frame rate; wherein the first preset scanning frame rate is less than the second preset scanning frame rate. 8.The touch system according to claim 6, characterized in that, The lidar is also used for: When scanning the display plane of the display device at the second preset scanning frame rate and no touch point is detected within the second preset time period, the system switches to scanning the display plane of the display device at the first preset scanning frame rate; wherein the first preset scanning frame rate is less than the second preset scanning frame rate. 9.The touch system of claim 8, wherein, The second preset scan frame rate is matched with the refresh rate of the display device. 10.The touch system according to claim 6, characterized in that, It also includes a stylus; The stylus includes: a pen barrel and a pen tip, and a connecting portion for connecting the pen barrel and the pen tip; at least a portion of the outer surface of the pen barrel and the connecting portion has a reflective layer, and the difference between the reflectivity of the reflective layer and n times a first preset threshold is greater than the preset threshold; where n is an integer greater than or equal to 0.

11. The touch system of claim 10, wherein, The stylus also includes: A pressure sensor built into the pen tip is used to detect the pressure applied to the pen tip and obtain pressure data, which is used to determine the touch type of the display device. The communication module built into the pen barrel is used to send the pressure data to a display device or a host connected to the display device; The display device or the host is further configured to: receive pressure data sent by the stylus, determine the touch type of the stylus on the display device based on the pressure data, and perform touch operation based on the touch type of the stylus on the display device. 12.The touch system according to claim 10, characterized in that, The stylus also includes: a pressure sensor built into the pen tip, used to detect the pressure on the pen tip to obtain pressure data, and the pressure data is used to determine the touch type of the display device; A gravity sensor built into the pen barrel is used to detect the gravity acting on the stylus and obtain gravity data. The pressure data and the gravity data are combined to determine the direction of movement of the stylus on the display device. The communication module built into the pen barrel is used to send the pressure data and the gravity data to the display device or a host connected to the display device; The display device or the host is further configured to: receive pressure data and gravity data sent by the stylus; determine the touch type of the stylus on the display device based on the pressure data; determine the movement direction of the stylus on the display device based on the pressure data and the gravity data; and perform touch operations based on the touch type and the movement direction.

13. The touch system according to any one of claims 6-12, wherein, The laser radar is positioned at any location around the display device, and the angle between the scanning plane of the laser radar and the display plane of the display device is less than or equal to a preset angle, and the radial distance between the scanning plane of the laser radar and the display plane of the display device is less than or equal to a second preset threshold. Alternatively, the lidar can be placed at any position on the desktop, and the angle between the scanning plane of the lidar and the desktop is less than or equal to a preset angle, and the radial distance between the scanning plane of the lidar and the desktop is less than or equal to a second preset threshold. Alternatively, the lidar may be mounted on a first wall, which is perpendicular to a second wall, and the second wall is the wall on which the display device is mounted.

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