A communication system, method and vehicle based on taillight projection

Abstract

The present application provides a communication system, method and vehicle based on taillight projection, which relates to the field of vehicle light technology. The communication system based on taillight projection includes: a first projection taillight; an interaction module for receiving projection input instructions; an instruction conversion module for generating a projection output signal according to the projection input instructions; a parameter generation module for generating adjustment parameters of the first projection taillight; and a control module for controlling the first projection vehicle light to perform projection according to the projection information and the adjustment parameters. The communication system based on taillight projection realizes the projection of the corresponding picture by receiving projection input instructions from the user, the vehicle main control system and / or the external device, thereby enriching the projection content and improving the interactivity with the user.

Description

Technical Field

[0001] The present application relates to the field of vehicle lamp technology, and in particular to a communication system, method and vehicle based on taillight projection. Background Art

[0002] In traditional technology, car lights are mainly used for lighting, etc. With the continuous development of science and technology, car lights that can realize projection are gradually used in cars. Projection car lights can project images or texts on the ground. For example, when a vehicle is driving, the projection car lights project the vehicle's driving speed and steering information on the ground at the rear of the vehicle, thereby alerting the vehicles behind, thereby ensuring the driving safety of the vehicle to a certain extent and reducing the probability of traffic accidents.

[0003] Existing projection lights can usually only project the content pre-stored in the vehicle system, and have the problems of single projection content and poor interactivity. Summary of the invention

[0004] The purpose of the present application is to overcome the defects of the prior art and to provide a communication system, method and vehicle based on taillight projection to solve the problems in the prior art.

[0005] In order to solve the above problems, in a first aspect of an embodiment of the present application, a communication system based on taillight projection is provided, comprising:

[0006] first projection taillights;

[0007] An interactive module, used to receive projection input instructions from a user, a vehicle main control system or / and an external device; wherein the projection input instructions from the user include one or more of action instructions, voice instructions or text instructions;

[0008] An instruction conversion module, configured to generate a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction;

[0009] A parameter generating module, used for generating adjustment parameters of the first projection taillight;

[0010] A control module is used to control the first projection lamp to perform projection according to the projection information and the adjustment parameters.

[0011] In an optional implementation, the system further includes a picture pre-generation module; the picture pre-generation module is used to obtain a three-dimensional virtual model of the vehicle, and perform simulated projection based on the three-dimensional virtual model and the projection information; the three-dimensional virtual model is obtained based on scaling the actual size of the vehicle;

[0012] Wherein, the parameter generating module is used to generate the adjustment parameters when the projection picture in the simulated projection meets the preset requirements.

[0013] In an optional implementation, the system further includes an image detection module and an image judgment module;

[0014] The image detection module is used to detect the virtual image generated by the simulated projection to obtain the relative relationship between the projection picture and the three-dimensional virtual model in the virtual image; the relative relationship includes: the proportional relationship and the positional relationship between the projection picture and the three-dimensional virtual model;

[0015] The image judgment module is used to judge whether the relative relationship judgment meets the preset requirements;

[0016] Wherein, the parameter generating module is used to generate the adjustment parameter according to the relative relationship when the relative relationship meets the preset requirements.

[0017] In an optional implementation, the system further includes an environment detection module; wherein the environment detection module is used to detect the real-time environment behind and to the side of the vehicle;

[0018] The picture pre-generation module is further used to generate a virtual environment corresponding to the real-time environment in the simulated projection;

[0019] The image detection module is further used to obtain the relative relationship between the projection picture and the virtual environment in the virtual image; the relative relationship also includes: the positional relationship between the projection picture and the virtual environment.

[0020] In an optional implementation, the system further includes a second projection taillight, wherein the second projection taillight is used to project a preset picture; the first projection taillight and the second projection taillight are both in even number, and the first projection taillight and the second projection taillight are both symmetrically arranged on both sides of the rear of the vehicle;

[0021] The second projection taillight comprises a light source, a turntable and a projection lens; there are a plurality of projection lenses, and the patterns and / or words arranged on each projection lens are different;

[0022] The light source is arranged at one end of a light-proof light transmission tube, and the end of the light transmission tube away from the light source is a light-emitting end, and the light-emitting end is used for emitting the light generated by the light source; wherein a light-transmitting column is arranged inside the light transmission tube, and the column is used for totally reflecting the light generated by the light source;

[0023] The turntable is provided with a plurality of mounting tubes, and the mounting tubes correspond to the projection lenses; the projection lenses are slidably arranged in the corresponding mounting tubes;

[0024] The turntable is configured to be rotatable relative to the light source so that any one of the projection lenses can be directly opposite to the light output end;

[0025] The installation tube comprises a first component section and a second component section respectively disposed at two ends, wherein the first component section is closer to the light-emitting end than the second component section; the projection lens is disposed in the first component section, and the projection lens is slidably connected to the inner wall of the first component section; the second component section is provided with a lens, and the lens is located in the second component section;

[0026] The turntable is provided with a driving device, and the driving device is configured to drive the projection lens to move in the mounting tube so as to make the projection lens approach or move away from the lens.

[0027] In an optional implementation, the lens is sealed and connected to the inner wall of the second group segment; inside the mounting tube, a closed space is formed between the lens and the projection lens;

[0028] The driving device comprises an air blowing device and an air suction device, the air blowing device is provided with a first pipeline, and the air suction device is provided with a second pipeline;

[0029] The blowing device is configured to blow air into the enclosed space through the first pipe, so that the projection lens moves in a direction away from the lens under the action of air pressure; the suction device is configured to suck air into the enclosed space through the second pipe, so that the projection lens moves in a direction close to the lens under the action of air pressure;

[0030] The inner wall of the first group of segments is provided with a sliding groove;

[0031] The projection lens comprises a lens body and a protrusion, wherein the protrusion is arranged on the side of the lens body, and the protrusion is slidably arranged in the sliding groove; the sliding direction of the lens relative to the sliding groove is parallel to the length direction of the sliding groove, wherein the length direction of the sliding groove is parallel to the length direction of the mounting tube;

[0032] Both ends of the sliding groove in the length direction are provided with limiting structures, and the limiting structures are used to limit the activity space of the protrusion.

[0033] In an optional implementation, the turntable includes a first end surface and a second end surface, and the first end surface and the second end surface are respectively disposed on both sides of the turntable in a thickness direction; the mounting tube passes through the first end surface and the second end surface;

[0034] The air blowing device is fixedly arranged on the first end surface, and the air suction device is fixedly arranged on the second end surface.

[0035] In an optional implementation, a rotating shaft is fixedly provided on the turntable, and the rotating shaft is in transmission connection with a power device, wherein the power device is used to drive the turntable to rotate; the mounting cylinders are distributed in a ring array about the rotating shaft;

[0036] The second projection lamp further includes an angle detection module, a rotation limiting module and a processing module, and the power device, the angle detection module and the rotation limiting module are all electrically connected to the processing module;

[0037] The angle detection module is configured to detect the rotation angle of the turntable, and the rotation limiting module is configured to limit the maximum rotation angle of the turntable; the processing module is configured to send a control signal to the power device when the rotation limiting module is triggered to stop the turntable from rotating.

[0038] In a second aspect of an embodiment of the present application, a communication method based on taillight projection is provided, and the method is applied to the communication system based on taillight projection as described above, wherein the method comprises:

[0039] Used to receive projection input instructions from a user, a vehicle main control system or / and an external device; wherein the projection input instructions from the user include one or more of action instructions, voice instructions or text instructions;

[0040] Generate a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction;

[0041] generating adjustment parameters of the first projection taillight;

[0042] The first projection vehicle lamp is controlled to perform projection according to the projection information and the adjustment parameters.

[0043] According to a third aspect of an embodiment of the present application, a vehicle is provided, comprising a vehicle body and the communication system based on taillight projection as described above, wherein the communication system based on taillight projection is installed on the vehicle body.

[0044] The beneficial effects of this application include:

[0045] The communication system based on taillight projection proposed in the present application includes a first projection taillight, an interaction module, an instruction conversion module, a parameter generation module and a control module. After the interaction module receives the projection input instruction, the instruction conversion module generates a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction; the parameter generation module generates adjustment parameters of the first projection taillight according to the projection information; and then, the control module controls the first projection car light to perform projection according to the projection information and the adjustment parameters, thereby realizing the projection of the corresponding picture.

[0046] The communication system based on taillight projection realizes the projection of corresponding pictures by receiving projection input commands from users, vehicle main control systems and / or external devices, thereby enriching the projection content and improving the interactivity with users. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A structural block diagram of a communication system based on taillight projection is shown;

[0049] Figure 2 A first schematic diagram of a second projection taillight is shown;

[0050] Figure 3 Shows Figure 2 a second schematic diagram of a second projection taillight;

[0051] Figure 4 A schematic diagram showing the connection between a light source and a driving circuit board is shown;

[0052] Figure 5 A schematic diagram of a light transmission tube is shown;

[0053] Figure 6 A schematic diagram of the connection between a turntable and a mounting cylinder is shown;

[0054] Figure 7 A schematic diagram of a projection lens is shown;

[0055] Figure 8 Shows Figure 6 A partial enlarged view of the middle a direction;

[0056] Fig. 9 A schematic diagram of a first pipeline is shown;

[0057] Fig.10 A connection block diagram of an electrical module on a second projection tail lamp is shown;

[0058] Fig.11 A schematic diagram showing the positional relationship between a turntable and an electromagnet is shown;

[0059] Fig.12 A schematic diagram of a vehicle is shown;

[0060] Fig.13 Shows Fig.12 A schematic diagram of the rear of the vehicle;

[0061] Fig.14 A flow chart of a communication method based on taillight projection is shown.

[0062] Description of main component symbols:

[0063] 10-first projection taillight; 11-interaction module; 12-command conversion module; 13-image pre-generation module; 14-parameter generation module; 15-control module; 16-image detection module; 17-image judgment module; 18-environment detection module; 20-second projection taillight; 100-light source; 110-driving circuit board; 120-light transmission tube; 121-light output end; 130-column; 200-turntable; 201-first end face; 202-second end face; 210-installation tube; 2 11-first component section; 212-second component section; 220-lens; 230-sliding groove; 231-step; 240-rotation axis; 300-projection lens; 310-main body; 320-protrusion; 410-blowing device; 411-first main pipe; 412-first branch pipe; 420-suction device; 430-power device; 440-angle detection module; 450-rotation limiting module; 460-processing module; 510-electromagnet; 520-movable shaft; 530-spring. DETAILED DESCRIPTION

[0064] The embodiments of the present application are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present application.

[0065] In the application, the first projection taillight includes a car taillight based on DLP technology, where DLP stands for Digital Light Processing.

[0066] Example

[0067] See also Figure 1 In this embodiment, a communication system based on taillight projection is proposed, including:

[0068] A first projection tail lamp 10;

[0069] Interaction module 11, used to receive projection input instructions from a user, a vehicle main control system or / and an external device;

[0070] The instruction conversion module 12 is used to generate a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction;

[0071] The image pre-generation module 13 is used to obtain a three-dimensional virtual model of the vehicle and perform simulated projection based on the three-dimensional virtual model and projection information; wherein the three-dimensional virtual model is obtained based on scaling the actual size of the vehicle;

[0072] The parameter generating module 14 is used to generate the adjustment parameters of the first projection taillight 10 when the projection picture in the simulated projection meets the preset requirements;

[0073] The control module 15 is used to control the first projection lamp to perform projection according to the projection information and the adjustment parameters.

[0074] The user's projection input command includes one or more of an action command, a voice command or a text command. Through the projection input command, the first projection taillight 10 can project a corresponding picture (the projected picture includes a pattern, animation, and text, etc.), thereby realizing interaction with the rear vehicles or pedestrians. For example, when the system is in working state, the user swings his head or hand to the left several times, thereby realizing the input of the projection input command. At this time, the projection information corresponding to the command is a left turn, wherein the projected picture is a text or pattern of the vehicle turning left, etc.; for another example, when the user inputs a voice command of "projecting an animation of turning left", the projected picture is an animation indicating that the vehicle is turning left.

[0075] The interactive module includes a display screen, a touch module, a sound collection module, and a motion capture module. The display screen can be a touch screen. The touch module includes buttons and keys. The sound collection module includes a pickup. The motion capture module includes a camera. The interactive module can be installed on the steering wheel, center console, and other locations of the vehicle. The vehicle main control system and external devices can establish a communication connection with the interactive module through wireless or wired connections.

[0076] In some embodiments, the display screen, touch control module, sound collection module, motion capture module, etc. can be integrated into one housing. In other embodiments, the display screen, touch control module, sound collection module, and motion capture module can be installed at different locations in the car, so as to facilitate interaction with the user, for example, the display screen is installed on the left or right side of the driver's seat; the touch control module is installed on the steering wheel; the sound collection module and the motion capture module are installed on the center console and located directly in front of the driver's seat.

[0077] The external device includes electronic devices such as mobile phones and smart watches. In one embodiment, before the user gets on the vehicle, the user can send a projection input instruction to the interactive module through the external device, wherein after the first projection headlight projects, the user can quickly find the location of the vehicle, thereby facilitating finding the vehicle in a large parking lot.

[0078] When the interactive module receives the projection input command input by the user, the command conversion module generates a projection output signal according to the projection input command. The projection output signal can be directly transmitted to the first projection taillight, but because the projection input commands input by the user in different scenes are different, the size and position of the actual projected image will also be different. For example, when the projection information contains a large number of text or patterns, if it is projected according to a fixed projection size, it will inevitably cause the displayed content to be too small to be seen clearly.

[0079] In this embodiment, the projection information is transmitted to the image pre-generation module in advance. After receiving the projection information, the image pre-generation module obtains the three-dimensional virtual model of the vehicle, wherein simulated projection is performed based on the three-dimensional virtual model and the projection information. At this time, the relative relationship between the projection image in the simulated projection and the three-dimensional virtual model can be quickly, accurately and intuitively determined through simulated projection, thereby facilitating active adjustment by the user or automatic adjustment by the system.

[0080] When the projection image in the simulated projection meets the preset requirements, the parameter generation module generates the adjustment parameters of the first projection taillight. Subsequently, the control module controls the first projection headlight to project according to the projection information and the adjustment parameters, so that a projection image of appropriate size and projected at the expected position can be obtained. The adjustment parameters can adjust the projection direction, angle, and projection size of the first projection taillight.

[0081] In this embodiment, the communication system based on taillight projection further includes an image detection module 16 and an image judgment module 17 .

[0082] The image detection module 16 is used to detect the virtual image generated by the simulated projection to obtain the relative relationship between the projection image and the three-dimensional virtual model in the virtual image. The relative relationship includes: the proportional relationship and the positional relationship between the projection image and the three-dimensional virtual model.

[0083] The image determination module 17 is used to determine whether the relative relationship determination meets the preset requirements. When the relative relationship is determined to meet the preset requirements, the parameter generation module generates adjustment parameters according to the relative relationship.

[0084] For easier understanding, the following example is used to illustrate:

[0085] Taking the proportional relationship as an example, in some embodiments, the width of the three-dimensional virtual model is used as a reference, wherein the ratio of the length of the projection screen to the width of the model is 1:0.8-1.5, and the ratio of the width of the projection screen to the width of the model is 1:0.3-0.7; when it is detected that the projection screen in the virtual image meets the above conditions, it indicates that the proportional relationship in the relative relationship meets the preset requirements;

[0086] Taking the positional relationship as an example, in some embodiments, the distance between the geometric center of the projection screen and the reference position on the model is 0.5 to 1 m; when it is detected that the projection screen in the virtual image meets the above conditions, it indicates that the positional relationship in the relative relationship meets the preset requirements.

[0087] The above descriptions are only examples. Under different requirements and scenarios, the preset requirements can be set and adjusted as needed.

[0088] Since the 3D virtual model is obtained by scaling the actual size of the vehicle, the overall size of the 3D virtual model is known. The size and position of the projected image in the virtual image are measured, wherein the proportional relationship and positional relationship between the actual projected image and the vehicle can be obtained after the numerical conversion based on the size and scaling ratio of the 3D virtual model. To this end, by limiting the proportional relationship, the size of the actual projected image can be ensured, thereby making it easier for pedestrians and drivers behind to see clearly; by limiting the positional relationship, the actual projected image can be placed in a prominent area and be more eye-catching, thereby making it easier for pedestrians and drivers behind to see it.

[0089] In the communication system based on taillight projection proposed in the present application, the relative relationship between the projection image in the simulated projection and the three-dimensional virtual model can be judged quickly, accurately and intuitively through simulated projection, thereby facilitating the user to make active adjustments or the system to make automatic adjustments, so that the actual projected image can be presented clearly and eye-catchingly.

[0090] In this embodiment, the communication system based on taillight projection further includes an environment detection module 18, which is used to detect the real-time environment behind and to the side of the vehicle. The environment detection module includes a vehicle-mounted camera, a car radar, etc., wherein the environment detection module can detect whether there are objects behind and to the side of the vehicle that affect the projection.

[0091] The picture pre-generation module 13 is also used to generate a virtual environment corresponding to the real-time environment in the simulated projection;

[0092] The image detection module 16 is also used to obtain the relative relationship between the projection picture in the virtual image and the virtual environment. The relative relationship also includes: the positional relationship between the projection picture and the virtual environment. By determining the positional relationship between the projection picture in the virtual image and the virtual environment, it is possible to avoid projecting the projected picture to a position where it cannot be clearly displayed. For example, when the environment detection module detects that the distance of the rear vehicle is too close, the image detection module will automatically detect other blank areas where projection can be performed, thereby realizing dynamic adjustment of the adjustment parameters, so that the first projection taillight projects the projection information in the blank area.

[0093] In this embodiment, the communication system based on taillight projection further includes a second projection taillight, wherein the second projection taillight is used to project a preset picture.

[0094] like Figure 2-Figure 7 As shown, the second projection taillight includes a light source 100, a turntable 200 and a projection lens 300. The light source 100 is mounted on a driving circuit board 110. The light source 100 may be a laser light source, wherein the laser has the advantages of high brightness, good directivity and good monochromaticity; the light source 100 may also be a high-power LED lamp bead.

[0095] There are multiple projection lenses 300, and the patterns and / or texts arranged on each projection lens 300 are different. The text includes a single character, a single word or a sentence.

[0096] In this embodiment, there are four projection lenses 300, which are respectively provided with: "turn left" words and a left turn arrow; "turn right" words and a right turn arrow; "brake" words; "parking" words. In different embodiments, the number of projection lenses 300 may be different, and the patterns or / and sentences set on the projection lenses 300 may also be different, wherein the patterns or / and sentences on the projection lenses 300 only need to comply with the specifications and be easy to identify. In this article, for the convenience of description, the projected patterns or / and sentences are collectively referred to as pictures.

[0097] The light source 100 is disposed at one end of a light-proof light transmission tube 120 . The end of the light transmission tube 120 away from the light source 100 is a light emitting end 121 . The light emitting end 121 is used for emitting the light generated by the light source 100 .

[0098] A light-transmitting column 130 is disposed inside the light transmission tube 120, and the column 130 is used to fully reflect the light generated by the light source 100, so that the light can be accurately irradiated to the corresponding projection lens 300. The column 130 can be made of glass or resin material with high light transmittance. Furthermore, the inner wall of the light transmission tube 120 can be coated with a reflective film.

[0099] In the drawings, the light transmitting tube 120 is in a straight tube shape, wherein when the light emitting end 121 is directly opposite to the projection lens 300 , the light source 100 , the light emitting end 121 and the projection lens 300 can be considered to be located on the same straight line.

[0100] In some other embodiments, due to the limitation of installation space and other conditions, the light source 100 may be installed in other positions, for example, the light source 100 is located below the light emitting end 121, and the light transmission tube 120 and the column 130 both have a certain curvature. When the light emitting end 121 is directly opposite to the projection lens 300, the light source 100, the light emitting end 121 and the projection lens 300 are not located on the same straight line, but due to the existence of the light transmission tube 120 and the column 130, the light emitted by the light source 100 can still be irradiated onto the projection lens 300.

[0101] The second projection taillight may include a housing, wherein the light source 100, the turntable 200 and the projection lens 300 are all installed inside the housing. It should be noted that the housing is not shown in the drawings. A structure such as a bracket may be provided inside the housing, so that the light transmission tube 120, the turntable 200, etc. can be installed on the corresponding bracket.

[0102] In this embodiment, a plurality of mounting tubes 210 are disposed on the turntable 200, and the mounting tubes 210 correspond to the projection lenses 300. The projection lenses 300 are slidably disposed in the corresponding mounting tubes 210. Specifically, the mounting tubes 210 correspond to the projection lenses 300 one by one.

[0103] The turntable 200 is configured to be rotatable relative to the light source 100 so that any projection lens 300 can be directly opposite to the light emitting end 121. In this way, by rotating the turntable 200, the projection lens 300 provided with the corresponding pattern or / and text can be directly opposite to the light emitting end 121, thereby projecting the corresponding pattern or / and text on the road surface, thereby alerting the vehicles or pedestrians behind.

[0104] like Figure 2 and Figure 3As shown, the mounting tube 210 includes a first component section 211 and a second component section 212 disposed at both ends. The first component section 211 is closer to the light output end 121 than the second component section 212. The projection lens 300 is disposed in the first component section 211, and the projection lens 300 is slidably connected to the inner wall of the first component section 211. The second component section 212 is provided with a lens 220, and the lens 220 is located in the second component section 212.

[0105] The turntable 200 is provided with a driving device, which is configured to drive the projection lens 300 to move in the mounting tube 210 so as to move the projection lens 300 closer to or farther from the lens 220 .

[0106] When the projected image is not clear, the driving device can be used to drive the projection lens 300 to move in the mounting tube 210, so that the projection lens 300 will be close to or away from the lens 220, so that the focal length can be adjusted so that a clear image can be projected on the ground. In some special cases, such as when a vehicle breaks down in the dark, the position of the projection lens 300 can be adjusted to enlarge the projected image, thereby facilitating the attention of the vehicle behind to avoid traffic accidents such as rear-end collisions.

[0107] In this embodiment, the lens 220 is sealed and connected to the inner wall of the second assembly section 212. In the installation tube 210, a closed space is formed between the lens 220 and the projection lens 300.

[0108] Reference Figure 2 and Figure 3 The driving device includes a blowing device 410 and an air suction device 420. Further, the blowing device 410 is provided with a first pipeline, and the air suction device 420 is provided with a second pipeline. The blowing device 410 may include a micro air pump, and the air suction device 420 may include a micro vacuum pump. For the convenience of observation, Figure 2 and Figure 3 The first and second conduits are not shown.

[0109] The blowing device 410 is configured to blow air into the enclosed space through a first pipe so that the projection lens 300 moves in a direction away from the lens 220 under the action of air pressure; the suction device 420 is configured to suck air into the enclosed space through a second pipe so that the projection lens 300 moves in a direction close to the lens 220 under the action of air pressure.

[0110] like Figure 6 and Figure 8 As shown, a sliding groove 230 is provided on the inner wall of the first group segment 211 .

[0111] like Figure 7As shown, the projection lens 300 includes a lens body 310 and a protrusion 320. The protrusion 320 is disposed on the side of the lens body 310, and the protrusion 320 is slidably disposed in the sliding groove 230. The sliding direction of the lens relative to the sliding groove 230 is parallel to the length direction of the sliding groove 230, wherein the length direction of the sliding groove 230 is parallel to the length direction of the mounting barrel 210. Figure 6 The direction indicated by the middle arrow is parallel to the length direction of the installation tube 210 .

[0112] There are multiple sliding grooves 230 , which can be distributed in a circular array about the central axis of the mounting tube 210 . The protrusions 320 of the projection lens 300 correspond to the sliding grooves 230 one by one.

[0113] Both ends of the sliding groove 230 in the length direction are provided with limiting structures, which are used to limit the activity space of the protrusion 320. That is, when the protrusion 320 moves to the end of the sliding groove 230, the limiting structure will limit the protrusion 320 from continuing to move.

[0114] Reference Figure 8 , the end of the sliding groove 230 close to the lens 220 will naturally form a step 231 (i.e., a limiting structure) due to the existence of the sliding groove 230, thereby playing a limiting role; the end of the sliding groove 230 away from the lens 220 is on the end surface of the mounting tube 210 ( Figure 8 A notch is formed on the surface (the surface indicated by the arrow in the middle), so that the protrusion 320 can be installed in the sliding groove 230. After the installation of the protrusion 320 is completed, a baffle plate or other structure (i.e., a limiting structure) can be set at the notch position to play a limiting role.

[0115] For the assembled finished product, there may be a gap within the allowable error range between the protrusion 320 of the projection lens 300 and the sliding groove 230, and between the projection lens 300 and the inner wall of the first assembly section 211. Since the end surface area of ​​the projection lens 300 is much larger than the cross-sectional area of ​​the above gap, when the blowing device 410 or the suction device 420 is working, the projection lens 300 will slide in the installation cylinder 210 under the action of air pressure. In addition, a small amount of lubricant can be filled between the gaps, which can reduce friction to facilitate the sliding of the projection lens 300 on the one hand, and also play a sealing role on the other hand.

[0116] like Fig. 9 As shown, the first pipeline includes a first main pipe 411 and a first branch pipe 412. There are multiple first branch pipes 412 and they correspond one to one with the installation tubes 210. One end of the first branch pipe 412 is connected to the first main pipe 411, and the other end is connected to the closed space.

[0117] The structure of the second pipeline can refer to the first pipeline. Specifically, the second pipeline includes a second main pipe and a second branch pipe, and there are multiple second branch pipes corresponding to the installation tubes 210. One end of the second branch pipe is connected to the second main pipe, and the other end is connected to the enclosed space.

[0118] In this embodiment, the connection positions of the first branch pipe and the second branch pipe with the mounting tube 210 are both located between the step 231 of the sliding groove 230 and the lens 220. In this way, whether blowing or sucking air into the enclosed space, the projection lens 300 can be ensured to move normally.

[0119] Each first branch pipe and each second branch pipe is provided with a control valve, wherein the control valve may be a micro electromagnetic valve. When it is necessary to control the movement of the projection lens 300, the control valve on the first branch pipe or the second branch pipe connected to the target mounting tube 210 (the target mounting tube 210 is the mounting tube 210 on which the projection lens 300 is mounted) is controlled to be opened, while the control valves on all other first branch pipes and all second branch pipes are kept closed.

[0120] In some other embodiments, control valves may also be provided on the first main pipe 411 and the second main pipe. When the blowing device 410 is working, the control valve of the first main pipe 411 is in an open state, and the control valve on the second pipe is in a closed state; when the suction device 420 is working, the control valve of the first main pipe 411 is in a closed state, and the control valve on the second pipe is in an open state.

[0121] In this embodiment, the turntable 200 includes a first end surface 201 and a second end surface 202, and the first end surface 201 and the second end surface 202 are respectively disposed on both sides of the thickness direction of the turntable 200. The mounting tube 210 passes through the first end surface 201 and the second end surface 202, wherein the first group segment 211 and the second group segment 212 are respectively disposed on both sides of the turntable 200.

[0122] The blowing device 410 is fixedly disposed on the first end surface 201, and the suction device 420 is fixedly disposed on the second end surface 202. Further, the first pipe is fixed on the first end surface 201, and the second pipe is fixed on the second pipe.

[0123] In order to install the first pipeline and the second pipeline, components such as pipe clamps are provided on the first end surface 201 and the second end surface 202, thereby achieving fixation of the first pipeline and the second pipeline.

[0124] Through the above-mentioned structural arrangement, the space on the first end surface 201 and the second end surface 202 can be reasonably utilized, thereby realizing the installation of the air blowing device 410, the air suction device 420, and the first pipeline and the second pipeline on the turntable 200. In addition, since the air blowing device 410, the air suction device 420, the first pipeline and the second pipeline are all installed on the turntable 200, when the turntable 200 rotates, the driving device can work normally without being affected by the rotation of the turntable 200.

[0125] In this embodiment, a locking device is provided on the installation tube 210, and the locking device locks the position of the projection lens 300. When the projection lens 300 moves to a corresponding position under the action of the driving device, the position of the projection lens 300 is locked by the locking device, thereby preventing the position of the projection lens 300 in the installation tube 210 from changing due to vehicle vibration or the like.

[0126] Further, the locking device includes an electromagnet, and a magnetic conductive member is provided on the side of the projection lens 300. The electromagnet is provided on the outer side of the mounting tube 210. The magnetic conductive member can be embedded in the protrusion 320 or wrapped on the outside of the protrusion 320: for example, the magnetic conductive member is an iron block, the projection lens 300 is made of resin material, and an embedding hole is provided on the protrusion 320, wherein the magnetic conductive member is embedded in the embedding hole; for example, the magnetic conductive member is an iron sheet, and the iron sheet is wrapped on the protrusion 320 by riveting or the like.

[0127] Since a plurality of projection lenses 300 are disposed on the turntable 200 , in order to project different images, the turntable 200 needs to be driven to rotate, so that the corresponding projection lenses 300 are directly opposite to the light emitting end 121 .

[0128] like Figure 3 As shown, in this embodiment, a rotating shaft 240 is fixedly arranged on the rotating disk 200. The rotating shaft 240 is transmission-connected with a power device 430, wherein the power device 430 is used to drive the rotating disk 200 to rotate. Figure 3 The power plant 430 is not shown.

[0129] The power device 430 may include a motor. The output shaft of the motor may be fixedly connected to the rotating shaft 240 via a coupling or the like; or the output shaft of the motor may be connected to the rotating shaft 240 via a transmission mechanism such as a gear set.

[0130] The mounting tubes 210 are distributed in a circular array about the rotation axis 240 , thereby controlling the rotation angle of the turntable 200 so that the corresponding projection lens 300 is directly opposite to the light output end 121 .

[0131] like Fig.10As shown, in this embodiment, the second projection taillight further includes an angle detection module 440, a rotation limiting module 450 and a processing module 460. Among them, the blowing device 410, the suction device 420, the power device 430, the angle detection module 440 and the rotation limiting module 450 are all electrically connected to the processing module 460.

[0132] The angle detection module 440 is configured to detect the rotation angle of the turntable 200, and the rotation limiting module 450 is configured to limit the maximum rotatable angle of the turntable 200; the processing module 460 is configured to send a control signal to the power device 430 when the rotation limiting module 450 is triggered to stop the turntable 200 from rotating.

[0133] The angle detection module 440 may include an angle sensor, an angle encoder, etc. The angle detection module 440 can accurately detect the rotation angle of the turntable 200 , thereby making any projection lens 300 directly opposite to the light output end 121 .

[0134] The rotation limiting module 450 may include a protrusion disposed on the side of the turntable 200, and a travel switch disposed on the housing. When the turntable 200 rotates a certain angle (less than 360°), the protrusion will definitely trigger the travel switch, thereby limiting the maximum rotatable angle of the turntable 200. In this embodiment, the maximum rotatable angle of the turntable 200 is less than 360°, that is, the turntable 200 cannot rotate one circle regardless of whether it rotates counterclockwise or clockwise. Since the blowing device 410 and the suction device 420 need to be powered on to work, for this reason, the blowing device 410 and the suction device 420 are both connected to wires. By limiting the maximum rotatable angle of the turntable 200, the wires can be protected to avoid the wires from being entangled and broken due to the turntable 200 rotating too many times.

[0135] The processing module 460 may include a microprocessor, a single chip microcomputer, etc.

[0136] In this embodiment, the second projection taillight further includes a fixing device configured to apply a force to the turntable 200 after the turntable 200 rotates to a desired angle, so that the turntable 200 remains fixed, that is, the turntable 200 and the housing remain relatively fixed.

[0137] like Fig.11 As shown, the fixing device includes an electromagnet 510, and the electromagnet 510 is installed at one end of a movable shaft 520. The movable shaft 520 is slidably arranged on a bracket inside the housing. The sliding direction of the movable shaft 520 is parallel to Fig.11 In the direction indicated by the arrow.

[0138] The turntable 200 may be made entirely of a magnetically conductive material such as iron; or, a ring-shaped magnetically conductive structure such as an iron ring may be fixedly disposed on the turntable 200 .

[0139] A spring 530 is provided on the movable shaft 520. When the electromagnet is not energized, the elastic force provided by the spring 530 prevents the electromagnet from contacting the turntable 200. When the turntable 200 rotates to the expected angle, the electromagnet 510 is energized. At this time, under the action of the magnetic field force, the electromagnet 510 and the turntable 200 attract each other, thereby making the electromagnet 510 and the turntable 200 contact and magnetically connected. When the turntable 200 needs to rotate again, the electromagnet 510 is de-energized. At this time, under the action of the elastic force of the spring 530, the electromagnet 510 moves in a direction away from the turntable 200, thereby separating the electromagnet 510 from the turntable 200.

[0140] Since the fixing device is provided, the turntable 200 can be fixed, ensuring that the corresponding projection lens 300 and the light output end 121 can maintain a directly opposite state, and at the same time, it can also play a role in protecting the power device 430.

[0141] The processing module 460 can be connected to the interactive module for communication. When the interactive module issues a corresponding instruction, the processing module 460 can control the power device 430 and the like to perform corresponding actions, thereby causing the second projection taillight to project a corresponding image on the ground.

[0142] Reference Fig.12 and Fig.13 In the present embodiment, there are an even number of the first projection taillights 10 and the second projection taillights 20, and the first projection taillights 10 and the second projection taillights 20 are symmetrically arranged on both sides of the rear of the vehicle.

[0143] Specifically, the number of the first projection taillights 10 and the number of the second projection taillights 20 are both two. The distance between the two first projection taillights 10 is L1, and the distance between the two second projection taillights 20 is L2, where L1>L2. Fig.13 , x represents the image projected by the first projection taillight 10 on the left, and y represents the image projected by the second projection taillight 20 on the right.

[0144] The first projection taillight 10 can project richer content, for example, dynamic patterns, texts and even videos, but the first projection taillight 10 has the problem of higher energy consumption. When more complex content needs to be projected, the user can use the first projection taillight 10 for projection.

[0145] The second projection taillight 20 mainly adopts a mechanical structure with better stability, but the content of the projection is relatively simple, projecting preset patterns or sentences, etc. When the vehicle is driving or parking on a relatively open road with less traffic, the user can choose to use the second projection taillight for projection, thereby reducing energy consumption. In addition, since the second projection taillight 20 uses a lens for projection, the projected picture will be clearer and can be used in an environment with higher brightness.

[0146] See also Fig.14 In this embodiment, a communication method based on taillight projection is also proposed. The method is applied to the communication system based on taillight projection mentioned above, wherein the method includes:

[0147] S1, receiving projection input instructions;

[0148] S2, generating a projection output signal according to the projection input instruction; wherein the projection output signal includes projection information corresponding to the projection input instruction;

[0149] S3, obtaining a three-dimensional virtual model of the vehicle, and performing simulated projection based on the three-dimensional virtual model and the projection information; wherein the three-dimensional virtual model is obtained based on scaling the actual size of the vehicle;

[0150] S4, for generating adjustment parameters of the first projection taillight when the projection picture in the simulated projection meets the preset requirements;

[0151] S5, controlling the first projection vehicle lamp to perform projection according to the projection information and the adjustment parameters.

[0152] In this embodiment, a vehicle is further proposed, comprising a vehicle body and the above-mentioned communication system based on taillight projection, wherein the communication system based on taillight projection is installed on the vehicle body.

[0153] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that the present application can be implemented with the help of software plus necessary general-purpose hardware. Of course, it can also be implemented through dedicated hardware including dedicated integrated circuits, dedicated CPUs, dedicated memories, dedicated components, etc.

[0154] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0155] The terms "first", "second", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

Claims

1. A communication system based on taillight projection, characterized in that: include: first projection taillights; An interactive module, used to receive projection input instructions from a user, a vehicle main control system or / and an external device; wherein the projection input instructions from the user include one or more of action instructions, voice instructions or text instructions; An instruction conversion module, configured to generate a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction; A parameter generating module, used for generating adjustment parameters of the first projection taillight; A control module, configured to control the first projection taillight to perform projection according to the projection information and the adjustment parameters; The system further includes a picture pre-generation module; the picture pre-generation module is used to obtain a three-dimensional virtual model of the vehicle, and perform simulated projection based on the three-dimensional virtual model and the projection information; the three-dimensional virtual model is obtained based on scaling the actual size of the vehicle; Wherein, the parameter generation module is used to generate the adjustment parameters when the projection picture in the simulated projection meets the preset requirements; The system also includes an image detection module and an image judgment module; The image detection module is used to detect the virtual image generated by the simulated projection to obtain the relative relationship between the projection picture and the three-dimensional virtual model in the virtual image; the relative relationship includes: the proportional relationship and the positional relationship between the projection picture and the three-dimensional virtual model; The image determination module is used to determine whether the relative relationship meets the preset requirements; Wherein, the parameter generation module is used to generate the adjustment parameter according to the relative relationship when the relative relationship meets the preset requirements; The system further comprises an environment detection module; wherein the environment detection module is used to detect the real-time environment behind and to the side of the vehicle; The picture pre-generation module is further used to generate a virtual environment corresponding to the real-time environment in the simulated projection; The image detection module is further used to obtain the relative relationship between the projection picture and the virtual environment in the virtual image; the relative relationship also includes: the positional relationship between the projection picture and the virtual environment.

2. The communication system based on taillight projection according to claim 1, characterized in that: The system further includes a second projection taillight, wherein the second projection taillight is used to project a preset picture; the first projection taillight and the second projection taillight are both in even number, and the first projection taillight and the second projection taillight are both symmetrically arranged on both sides of the rear of the vehicle; The second projection taillight comprises a light source, a turntable and a projection lens; there are a plurality of projection lenses, and the patterns and / or texts arranged on each projection lens are different; wherein the texts comprise a single word, a single word or a sentence; The light source is arranged at one end of a light-proof light transmission tube, and the end of the light transmission tube away from the light source is a light-emitting end, and the light-emitting end is used for emitting the light generated by the light source; wherein a light-transmitting column is arranged inside the light transmission tube, and the column is used for totally reflecting the light generated by the light source; The turntable is provided with a plurality of mounting tubes, and the mounting tubes correspond to the projection lenses; the projection lenses are slidably arranged in the corresponding mounting tubes; The turntable is configured to be rotatable relative to the light source so that any one of the projection lenses can be directly opposite to the light output end; The installation tube comprises a first component section and a second component section respectively disposed at two ends, wherein the first component section is closer to the light-emitting end than the second component section; the projection lens is disposed in the first component section, and the projection lens is slidably connected to the inner wall of the first component section; the second component section is provided with a lens, and the lens is located in the second component section; The turntable is provided with a driving device, and the driving device is configured to drive the projection lens to move in the mounting tube so that the projection lens is close to or away from the lens; The lens is sealed and connected to the inner wall of the second group segment; inside the mounting tube, a closed space is formed between the lens and the projection lens; The driving device comprises an air blowing device and an air suction device, the air blowing device is provided with a first pipeline, and the air suction device is provided with a second pipeline; The blowing device is configured to blow air into the enclosed space through the first pipe, so that the projection lens moves in a direction away from the lens under the action of air pressure; the suction device is configured to suck air into the enclosed space through the second pipe, so that the projection lens moves in a direction close to the lens under the action of air pressure; The inner wall of the first group of segments is provided with a sliding groove; The projection lens comprises a lens body and a protrusion, wherein the protrusion is arranged on a side of the lens body, and the protrusion is slidably arranged in the sliding groove; the sliding direction of the projection lens relative to the sliding groove is parallel to the length direction of the sliding groove, wherein the length direction of the sliding groove is parallel to the length direction of the mounting tube; Both ends of the sliding groove in the length direction are provided with limiting structures, and the limiting structures are used to limit the activity space of the protrusion.

3. The communication system based on taillight projection according to claim 2, characterized in that: The turntable comprises a first end surface and a second end surface, wherein the first end surface and the second end surface are respectively disposed on both sides of the turntable in a thickness direction; the mounting tube passes through the first end surface and the second end surface; The air blowing device is fixedly arranged on the first end surface, and the air suction device is fixedly arranged on the second end surface.

4. The communication system based on taillight projection according to claim 2, characterized in that: The turntable is fixedly provided with a rotating shaft, and the rotating shaft is in transmission connection with a power device, wherein the power device is used to drive the turntable to rotate; the mounting cylinders are distributed in a circular array about the rotating shaft; The second projection taillight further includes an angle detection module, a rotation limiting module and a processing module, and the power device, the angle detection module and the rotation limiting module are all electrically connected to the processing module; The angle detection module is configured to detect the rotation angle of the turntable, and the rotation limiting module is configured to limit the maximum rotation angle of the turntable; the processing module is configured to send a control signal to the power device when the rotation limiting module is triggered to stop the turntable from rotating.

5. A communication method based on taillight projection, characterized in that: The method is applied to the communication system based on taillight projection according to any one of claims 1 to 4, wherein the method comprises: Used to receive projection input instructions from a user, a vehicle main control system or / and an external device; wherein the projection input instructions from the user include one or more of action instructions, voice instructions or text instructions; Generate a projection output signal according to the projection input instruction, wherein the projection output signal includes projection information corresponding to the projection input instruction; generating adjustment parameters of the first projection taillight; The first projection taillight is controlled to perform projection according to the projection information and the adjustment parameters.

6. A vehicle, characterized in that: It comprises a vehicle body and the communication system based on taillight projection according to any one of claims 1 to 4, wherein the communication system based on taillight projection is installed on the vehicle body.

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