Projection vehicle lamp and vehicle projection system

Abstract

The present invention relates to the field of optical technology and provides a projection headlight and a vehicle projection system. The projection headlight comprises: a light source; a light transmission module, which is used to transmit a light beam generated by the light source to a DMD; when the projection headlight is in a projection mode and a low-beam lighting mode, the DMD is used to reflect the light beam emitted by the light transmission module to a light output module via a plane reflector; when the projection headlight is in a high-beam lighting mode, a first rotating mirror module is used to reflect the light beam emitted by the light transmission module to the light output module via a convex reflector, wherein the light output module is used to project or illuminate the received light beam, thereby realizing mutual switching between the projection mode and the lighting mode of the projection headlight.

Description

Technical Field

[0001] The present invention relates to the field of optical technology, and in particular to a projection vehicle lamp and a vehicle projection system. Background Art

[0002] As people's demand for car configuration continues to increase, cars are no longer just a means of transportation, but also one of the entertainment devices that users can use to entertain themselves during travel and rest. For example, when driving out for fun, users can use the projection function of the car headlights to watch movies or entertainment videos. The above-mentioned car headlights with projection function are called projection headlights. At present, the car headlight projection system realizes the projection function of the car headlights by installing a projector unit inside the car headlights and using the car headlights as the light source of the projector. If the user wants to use the car headlights for lighting, he needs to turn off the projection mode of the car headlights and then turn on the lighting mode of the car headlights, and it is not easy to switch between the projection mode and the lighting mode of the car headlights. Therefore, how to realize the switching between the projection mode and the lighting mode of the projection headlights is an urgent problem that needs to be solved. Summary of the Invention

[0003] The present invention provides a projection vehicle lamp and a vehicle projection system. The projection vehicle lamp can facilitate users to switch between projection modes and lighting modes according to their own needs.

[0004] In a first aspect, a projection headlight is provided, comprising: a light source; a light transmission module for transmitting a light beam generated by the light source to a digital micromirror device (DMD); when the projection headlight is in projection mode and low-beam lighting mode, the DMD is used to reflect the light beam emitted by the light transmission module to a light output module via a plane reflector; when the projection headlight is in high-beam lighting mode, the DMD is used to reflect the light beam emitted by the light transmission module to the light output module via a convex reflector; and the light output module is used to project or illuminate the received light beam.

[0005] A digital micromirror device (DMD) is added to the interior of the above-mentioned projection lamp, and the DMD includes a plurality of rotating mirror modules. Any one of the plurality of rotating mirror modules (i.e., the first rotating mirror module) includes a convex reflector and a plane reflector. When the user needs the projection lamp to project, the first rotating mirror module rotates to the plane reflector, and the plane reflector reflects the light beam emitted by the light transmission module to the light output module; when the user needs the projection lamp to perform high beam lighting, the first rotating mirror module rotates to the convex reflector, and the convex reflector reflects the light beam emitted by the light transmission module to the light output module. It can be seen that the projection lamp can switch between projection mode and lighting mode based on user needs.

[0006] Optionally, the light transmission module includes a collimating and shaping module, a light rod and a first convex lens, wherein the collimating and shaping module is used to collimate and shape the light beam generated by the light source, and transmit the collimated and shaped light beam to the light rod; the light rod is used to mix the light beam emitted by the collimating and shaping module; and the first convex lens is used to focus the light beam emitted by the light rod.

[0007] Optionally, the collimating and shaping module includes a collimating lens, a second convex lens and a concave lens, the collimating lens is used to collimate the light beam generated by the light source; the second convex lens is used to focus the light beam emitted by the collimating lens; the concave lens is used to parallelize the light beam emitted by the second convex lens.

[0008] Optionally, the projection vehicle lamp further includes: a TIR prism group, configured to transmit the light beam emitted by the light transmission module to the DMD, and further configured to transmit the light beam emitted by the DMD to the light output module.

[0009] Optionally, the light source includes an RGB laser tube.

[0010] Optionally, the light source further includes an infrared laser tube.

[0011] Optionally, the DMD includes multiple rotating mirror modules, the first rotating mirror module among the multiple rotating mirror modules includes a convex reflector and a plane reflector, the convex reflector and the plane reflector are arranged on two parallel surfaces of the first rotating mirror module, and the first rotating mirror module is any one of the multiple rotating mirror modules.

[0012] In a second aspect, a vehicle projection system is provided, comprising: a central processing module, an image acquisition module, an image processing module, a communication module, a projection server, a DMD module, an optical module and a sensor module; the central processing module is connected to the output end of the image acquisition module, the output end of the optical module and the transmission end of the image processing module, respectively, for receiving external operation instructions, and for processing the image data sent by the image acquisition module, and also for processing the ambient light intensity data sent by the optical module; the image acquisition module is used to acquire road condition images and recognize the road condition images; the image processing module is connected to the first communication end of the communication module, and is used to The projection headlight is configured to control the working mode of the projection headlight according to the control instruction sent by the central processing module; the projection server is connected to the second communication end of the communication module and is used to store projection resources; the communication module is connected to the input end of the DMD module and is used to process the communication information between the image processing module, the projection server and the DMD module; the DMD module is connected to the input end of the DMD and is used to control the projection headlight to switch to different working modes; the optical module is connected to the output end of the sensor module and is used to process the ambient light intensity data sent by the sensor module; the sensor module is used to collect the ambient light intensity data.

[0013] In a third aspect, a method for controlling a projection headlight is provided, comprising: receiving a first control instruction, the first control instruction being used to switch the projection headlight from a high-beam lighting mode to a projection mode; prompting a user to confirm the first control instruction when the car is in motion; receiving a second control instruction, the second control instruction being used to confirm or revoke the first control instruction; and controlling the operating mode of the projection headlight according to the second control instruction.

[0014] For example, when a projection headlight is currently in high-beam mode, after the central processing module receives an operation instruction (e.g., a projection operation instruction) from a user, it generates a first control instruction (e.g., a projection control instruction) based on the user's operation instruction and sends this first control instruction to the image processing module. The image processing module then determines the current operating state of the vehicle based on the first control instruction. If the vehicle is currently in motion, it prompts the user (e.g., via voice) to confirm whether to execute the first control instruction. At this point, the user sends a second control instruction (e.g., confirming execution) to the central processing module in response to the voice prompt. The projection headlight then switches from the current high-beam mode to projection mode based on this second control instruction. If the second control instruction is an undo operation (i.e., revoking the first control instruction), it indicates that the user's previous operation of the first control instruction to the central processing module was an error, and the projection headlight remains in high-beam mode. Thus, by configuring the first and second control instructions to work together to determine whether to switch the current operating mode of the projection headlight while the vehicle is in motion, the situation in which a single user error causes the projection headlight mode to switch, potentially leading to a traffic accident, is avoided.

[0015] Optionally, the projection headlight is the projection headlight described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a projection vehicle lamp provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of a DMD mirror structure provided by an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of a DMD mirror structure provided in an embodiment of the present invention is a planar reflector;

[0020] Figure 4 A schematic diagram of a DMD mirror structure provided in an embodiment of the present invention is a convex reflector;

[0021] Figure 5 A schematic structural diagram of a control system for a projection vehicle lamp provided by an embodiment of the present invention;

[0022] Figure 6A schematic flow chart of a method for controlling a projection vehicle lamp provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the present invention. Furthermore, the accompanying drawings only illustrate portions relevant to the present invention, not all structures. It is hereby noted that in all drawings of the present invention, a solid black dot on two intersecting lines indicates a cross connection, while an absence of a solid black dot on two intersecting lines indicates a non-connected cross connection.

[0024] With the increasing demand for car features, cars are no longer just a means of transportation; they have also become entertainment devices that users can use to relax while traveling. For example, while driving, users can use the projection function of their car headlights to watch movies or entertainment videos. Currently, the projection function of car headlights is achieved by installing a projector unit inside the car headlights and using the car headlights as the projector's light source. If a user wants to use such a projection-enabled headlight for lighting, they must first turn off the projection function before turning on the lighting function, and cannot easily switch from projection to lighting. Therefore, how to switch between projection mode and lighting mode in a projection headlight is an urgent problem that needs to be solved.

[0025] Figure 1 1 is a schematic structural diagram of a projection lamp provided by an embodiment of the present invention, the projection lamp comprising:

[0026] Light source 101; light transmission module 102, used to transmit the light beam generated by light source 101 to digital micromirror device DMD103; DMD103 includes multiple rotating mirror modules, the first rotating mirror module among the multiple rotating mirror modules includes a convex reflector and a plane reflector, the convex reflector and the plane reflector are arranged on two parallel surfaces of the first rotating mirror module, and the first rotating mirror module is any one of the multiple rotating mirror modules; when the projection lamp is in projection mode and low beam lighting mode, the first rotating mirror module is used to reflect the light beam emitted by light transmission module 102 to light output module 105 through the plane reflector; when the projection lamp is in high beam lighting mode, the first rotating mirror module is used to reflect the light beam emitted by light transmission module 102 to light output module 105 through the convex reflector.

[0027] Exemplarily, light source 101 is a beam emitted by a laser tube. Light source 101 includes an RGB laser tube (i.e., an RGB three-color laser tube). The RGB three-color laser tube can emit a three-color laser beam consisting of red, green, and blue light. This three-color laser beam can be used not only as a light source for vehicle lighting but also for vehicle projection. Furthermore, light source 101 also includes an infrared laser tube that can emit infrared laser light. This infrared laser light is not used for lighting, but rather for detecting road conditions. For example, a projection headlight can identify the surrounding environment during driving, such as the specific conditions of surrounding vehicles and obstacles, by receiving the returned infrared beam.

[0028] Exemplarily, the light transmission module 102 is configured to transmit the light beam generated by the light source 101 to the digital micromirror device (DMD) 103. For example, the three-color laser beams emitted by the RGB laser tube are mixed by the light transmission module 102 and output as white light. The white light is then transmitted (e.g., refracted) to the DMD, which then transmits (e.g., refracts and reflects) the white light to the light output module 105.

[0029] Exemplarily, the optical transmission module 102 includes a collimating and shaping module, a light rod 1024, and a first convex lens 1025. The collimating and shaping module is used to collimate and shape the light beam generated by the light source 101 and transmit the collimated and shaped light beam to the light rod 1024. The light rod 1024 is used to mix the light beam emitted by the collimating and shaping module. The first convex lens 1025 is used to focus the light beam emitted by the light rod 1024. For example, after the three-color laser beam emitted by the RGB three-color laser tube undergoes beam collimation, beam shaping, and homogenization processing by the collimating and shaping module, it outputs a collimated and shaped three-color laser beam. The collimated and shaped three-color laser beam is then mixed by the light rod 1024 and outputs a white light beam. The cross-section of the light rod 1024 is rectangular, and the length and width of the rectangle are consistent with the length and width of the digital micromirror array. The white light beam output by the light rod 1024 is a rectangular white light beam. This rectangular white light beam is transmitted to the first convex lens 1025 for focusing and generating a focused light beam. This focused light beam is reflected by the DMD 103 to generate a reflected light beam. This reflected light beam is then transmitted through the light transmission module 105 for illumination or projection. The light output module 105 is a convex lens, and the reflected light beam is then focused by the convex lens for illumination or projection.

[0030] Exemplarily, the collimating and shaping module includes a collimating lens 1021, a second convex lens 1022, and a concave lens 1023. The collimating lens 1021 is used to collimate the light beam generated by the light source 101; the second convex lens 1022 is used to focus the light beam emitted by the collimating lens 1021; and the concave lens 1023 is used to parallelize the light beam emitted by the second convex lens 1022. The collimating lens 1021 is an instrument that can convert light from each point in the aperture column into a parallel, collimated beam of light. The collimating lens 1021 is used to convert the light beam (e.g., a laser beam) generated by the light source 101 into a parallel, collimated beam of light to reduce beam divergence, thereby improving the efficiency of beam utilization. For example, the three-color laser beam emitted by the RGB three-color laser tube is collimated by the collimating lens 1021 to output a three-color parallel laser beam. The three-color parallel laser beam is focused by the second convex lens 1022 to output a focused three-color laser beam. The focusing process can reduce the divergence of the three-color parallel laser beam. The focused three-color laser beam is parallelized by the concave lens 1023 to output a group of three-color parallel laser beams. The three-color parallel laser beam is used to enter the light rod 1024 for light mixing processing to obtain white light.

[0031] Exemplarily, the projection lamp further includes a total internal reflection (TIR) ​​prism assembly 104 for transmitting the light beam emitted by the light transmission module to the DMD 103 and for transmitting the light beam emitted by the DMD 103 to the light output module 105. The TIR prism assembly 104 includes a lower TIR prism 1041 and an upper TIR prism 1042, with a gap between the lower TIR prism 1041 and the upper TIR prism 1042. For example, the light beam emitted by the optical transmission module 102 is reflected by the lower TIR prism 1041 for the first time to the DMD 103. After the light beam is reflected by the DMD 103 for the first time, a first reflected light beam is generated. The first reflected light beam is reflected for the second time on the mirror surface of the DMD 103 and a second reflected light beam is generated. The second reflected light beam first passes through the lower TIR prism 1041 to generate a third total reflection and generate a third total reflection light beam. The third total reflection light beam then passes through the upper TIR prism 1042 to generate a fourth total reflection and generate a fourth total reflection light beam. Figure 1 The fourth total reflection light beam is illuminated or projected through the light output module 103. The TIR prism group 104 reflects as much of the light beam passing through it as possible to reduce light loss.

[0032] The DMD103 includes a plurality of rotating mirror modules, wherein the first rotating mirror module among the plurality of rotating mirror modules includes a convex reflector and a plane reflector, and the convex reflector and the plane reflector are arranged on two parallel surfaces of the first rotating mirror module. The first rotating mirror module is any one of the plurality of rotating mirror modules. For example, the DMD103 includes 36 rotating mirror modules, each of which has two parallel surfaces (i.e., a plane reflector and a convex reflector). Figure 2 As shown, the first rotating mirror module is any one of the 36 rotating mirror modules, and one of the parallel surfaces of the first rotating mirror module is a plane reflector (such as Figure 3 As shown) and the other parallel surface is a convex reflector (as Figure 4 As shown), wherein the plane reflector and the convex reflector are rotated by a rotating device ( Figure 2 The rotating device may be a rotating shaft or other components with a rotating function, which is not limited in this application. When the projection lamp is in different operating modes, the mirror position of the first rotating mirror is different.

[0033] For example, when the projection lamp is in projection mode and low beam lighting mode, the 36 rotating mirror modules in the DMD103 are all flipped to the flat reflector, such as Figure 3 As shown, at this time, the DMD103 is used to use the 36 plane reflectors to reflect the light beam emitted by the light transmission module 102 through the TIR prism group and then output a total reflection light beam, which is then passed through the light output module 103 for low beam lighting or projection. When the projection lamp is in high beam lighting mode, the 36 rotating mirror modules in the DMD103 are all flipped to the convex reflector, as shown in FIG. Figure 3 As shown, the DMD 103 is used to use the 36 convex reflectors to reflect the light beam emitted by the light transmission module 102 through the TIR prism group, and then output a total reflection light beam. The total reflection light beam passes through the light output module 103 for high beam illumination. As can be seen, the projection lamp can switch between projection mode and illumination mode based on user needs.

[0034] The above describes the specific structure of the projection lamp. The following will introduce a vehicle projection system, such as Figure 5As shown, the projection system includes: a central processing module, an image acquisition module, an image processing module, a communication module, a projection server, a DMD module, an optical module and a sensor module; the central processing module is connected to the output end of the image acquisition module, the output end of the optical module and the transmission end of the image processing module, and is used to receive external operation instructions, and is used to process image data sent by the image acquisition module, and is also used to process ambient light intensity data sent by the optical module; the image acquisition module is used to acquire road condition images and recognize road condition images; the image processing module is connected to the first communication end of the communication module and is used to control the working mode of the projection lamp according to the control instruction sent by the central processing module; the projection server is connected to the second communication end of the communication module and is used to store projection resources; the communication module is connected to the input end of the DMD module and is used to process communication information between the image processing module, the projection server and the DMD module; the DMD module is connected to the input end of the DMD and is used to control the projection lamp to switch to different working modes; the optical module is connected to the output end of the sensor module and is used to process the ambient light intensity data sent by the sensor module; the sensor module is used to acquire ambient light intensity data.

[0035] Exemplarily, an external operation instruction refers to an operation instruction input by a user through an external input module. For example, when a user encounters a road section with poor lighting conditions during night driving, it is necessary to switch the projection headlights from the current low beam mode to the high beam mode. At this time, the user can input the operation instruction of the high beam mode through the external input module; when encountering a road section with good lighting conditions, it is necessary to switch the projection headlights from the current high beam mode to the low beam mode. At this time, the user can input the operation instruction of the low beam mode through the external input module.

[0036] Exemplarily, after receiving an operation instruction input by a user from an external input module, the central processing module generates a corresponding control instruction, which is used to control the switching of the operating mode of the projection headlight. The central processing module sends the control instruction to the transmission end of the image processing module. The transmission end of the image processing module can serve as both an input end and an output end, and is used to receive the control instruction sent by the central processing module. When the transmission end of the image processing module receives the operation instruction, it serves as an input end; when the transmission end of the image processing module sends the operation instruction, it serves as an output end. After receiving the control instruction, the image processing module sends the control instruction to the communication module. After receiving the control instruction, the communication module sends the control instruction to the DMD module. The DMD module switches the mirror structure of the DMD 103 of the projection headlight to the target reflector (e.g., a convex reflector) according to the control instruction. At this time, the projection headlight switches from the current operating mode to the target operating mode (e.g., high beam operating mode).

[0037] For example, if the current projection headlight is in projection mode, if the central processing module receives an operation instruction input by the user to switch to high beam lighting mode, the central processing module generates a control instruction to switch to high beam lighting mode according to the operation instruction, and sends the control instruction to the image processing module. At this time, the image processing module sends the control instruction to the communication module, and the communication module sends the received control instruction to the DMD control module. The DMD module switches the mirror structure of DMD103 of the above-mentioned projection headlight to a convex reflector according to the control instruction. At this time, the projection headlight switches from the current projection mode to the high beam lighting mode.

[0038] Exemplarily, the image acquisition module is used to acquire road condition images and recognize the road condition images. The image acquisition module can be a camera outside the vehicle or an infrared imaging device, and this application does not impose any restrictions on this. Taking the image acquisition module as an example, the camera is used to capture the road conditions during the vehicle's driving process in real time and recognize the road condition images, so that the central processing module can determine whether to switch the current working mode of the projection lights based on the recognition results of the road condition images sent by the image acquisition module. For example, at night, vehicle A and vehicle B are driving towards each other, and the projection lights of the two vehicles are currently in high beam mode. As vehicle A and vehicle B get closer, the camera captures the road conditions at this time and recognizes the brightness of the road condition image. The camera recognizes the road condition image and finds that the brightness of the road condition image is getting higher and higher. At this time, the camera sends the recognition result of the increasingly higher brightness of the road condition image to the central processing module. When the central processing module receives the recognition result, the central processing module automatically generates a control instruction to switch to the low beam mode and sends the control instruction to the image processing module. The image processing module is connected to the first communication end of the communication module. The image processing module sends the control instruction to the communication module through the first communication end of the communication module. The communication module then sends the control instruction to the DMD module. The DMD module switches the mirror structure of the DMD103 of the above-mentioned projection lamp to a flat reflector according to the control instruction. At this time, the projection lamp switches from the current high beam working mode to the low beam working mode.

[0039] For example, when vehicle A is driving in a dark environment, its projection headlights are in high-beam mode. When vehicle A moves from the dark environment to an open environment, the camera captures the current road conditions and identifies the current road condition image as good. The camera then sends the good road condition identification result to the central processing module. Based on this identification result, the central processing module automatically generates a control instruction for switching to low-beam mode and sends this control instruction to the image processing module. The image processing module transmits this control instruction to the communication module via the first communication terminal of the communication module. The communication module then transmits this control instruction to the DMD module. Based on this control instruction, the DMD module switches the mirror structure of the DMD 103 of the projection headlight to a flat reflector. At this point, the projection headlight switches from the current high-beam mode to the low-beam mode. When vehicle A moves from an open environment to a dark environment, the central processing module controls the projection headlights to switch from the current low-beam mode to the high-beam mode in the same manner as the projection headlights switch from the current high-beam mode to the low-beam mode, and will not be further described here.

[0040] Exemplarily, the sensor module is used to collect ambient light intensity data. The sensor module includes multiple sensors, such as one or more light intensity sensors or color sensors. The sensor module is arranged in the lamp or attached to the outside of the vehicle body, wherein the light intensity sensor is used to collect the brightness intensity data of the surrounding environment, and the color sensor is used to collect the color intensity data of the surrounding environment. The above-mentioned ambient light intensity data can be brightness intensity data or color intensity data, which is not limited in this application. The optical module is connected to the output end of the above-mentioned sensor module and is used to process the ambient light intensity data sent by the sensor module. For example, the sensor module is a light intensity sensor. When vehicle A is driving at night, the brightness of the road condition image collected by the image acquisition module (such as a camera) is very low, and the camera cannot accurately identify the driving conditions of other vehicles around vehicle A in the road condition image. At this time, the light intensity sensor can collect the ambient brightness intensity data around vehicle A. The light intensity sensor sends the collected ambient brightness intensity data to the optical module, and the optical module sends the ambient brightness intensity data to the central processing module. The central processing module corrects the brightness of the road condition image collected by the image acquisition module according to the ambient brightness intensity data.

[0041] For example, the sensor module is a color sensor, which is used to collect color and light intensity data of the surrounding environment. The color sensor sends the collected color and light intensity data of the surrounding environment to the optical module, and the optical module then sends the color and light intensity data to the central processing module. The central processing module corrects the color of the road condition image collected by the image acquisition module based on the color and light intensity data to improve the image acquisition module's recognition accuracy of the road condition image. For example, when the sunlight intensity is high during the day, the brightness of the road condition image collected by the image acquisition module (e.g., a camera) will be higher. In this case, the color and light intensity data collected by the color sensor can be used to correct the color and brightness of the road condition image, or the average light intensity within 24 hours can be used to correct the color and brightness of the road condition image.

[0042] For another example, at night, when a vehicle is driving, when the image acquisition module collects night road condition images, due to insufficient light at night, the brightness of the road condition images collected by the image acquisition module will be low, so that the image acquisition module cannot accurately identify the driving road conditions in the road condition images. At this time, the central processing module can use the color intensity data collected by the color sensor as a supplement to enhance the color brightness of the collected road condition images to improve the recognition accuracy of the road condition images.

[0043] For example, at night, when a vehicle is driving, if the street lights around the road section are yellow light, the yellow light source will make the road condition image collected by the image acquisition module yellowish. At this time, the central processing module can use the difference between the yellow light intensity collected by the color sensor and the yellow light intensity in the reference light intensity to correct the color cast of the road condition image.

[0044] For another example, when the projection car light is in projection mode, the color sensor can also collect the color light intensity data of the surrounding environment of the projection position in real time, and send the color light intensity data to the optical module. The optical module sends the received color light intensity data to the central processing module. The central processing module corrects the color brightness of the projected video in real time according to the color light intensity data.

[0045] Exemplarily, the optical module can also be used to process the operating status of the sensor module. For example, when a user turns the vehicle on or off, the central processing module sends a control instruction to the optical module to turn the sensor module on or off. The optical module then sends this control instruction to the sensor module, causing the sensor module to start or stop operating. For example, if the central processing module sends a control instruction to the optical module to turn on the color sensor module, the optical module controls the color sensor to start operating according to this control instruction. If the central processing module sends a control instruction to the optical module to turn off the color sensor module, the optical module controls the color sensor to stop operating according to this control instruction.

[0046] Exemplarily, the central processing module can determine whether to control the projector headlight to switch its operating mode based on ambient light intensity data collected by the sensor module. For example, when the projector headlight is in illumination mode, if the ambient light intensity collected by the sensor module (e.g., a light intensity sensor) gradually increases, the central processing module generates a control instruction based on the ambient light intensity data collected by the sensor module and sent by the optical module. The control instruction is sequentially sent to the image processing module and the communication module. The communication module sends the control instruction to the DMD module. The DMD module controls the DMD mirror structure of the projector headlight to switch to a flat reflector based on the control instruction. In this case, the projector headlight is in low beam mode. If the ambient light intensity collected by the sensor module (e.g., a light intensity sensor) remains at a low level, the central processing module generates a control instruction based on the ambient light intensity data collected by the sensor module and sent by the optical module. The control instruction is sequentially sent to the image processing module and the communication module. The communication module sends the control instruction to the DMD module. The DMD module controls the DMD mirror structure of the projector headlight to switch to a convex reflector based on the control instruction. In this case, the projector headlight is in high beam mode.

[0047] Exemplarily, the central processing module combines light intensity data collected by the light intensity sensor with road image data collected by the image acquisition module to improve the image acquisition module's recognition accuracy of the road image data. For example, the central processing module compares the brightness of the road image with the ambient brightness structure collected by the light intensity sensor, or compares the color ratio of the road image with the color ratio identified by the color sensor to correct the brightness and color of the road image.

[0048] Exemplarily, the image processing module is used for image processing and data transmission. The communication module is used for communication scheduling and is responsible for communication scheduling between the image processing module, the projection server and the DMD module to avoid communication conflicts between different modules. The projection server is connected to the second communication end of the communication module and is used to store projection resources. The projection resources include traffic sign images, entertainment videos, and camera recordings. This application does not impose any restrictions on the specific content of the projection resources. The communication module is connected to the input end of the DMD module and is used to schedule communications between different modules and the DMD module to avoid conflicts between different communication instructions, thereby affecting the normal operation of the DMD module.

[0049] For example, when a user wants to use the projection function of a projection headlight, they can input a projection operation instruction through the external input module. The projection operation instruction is sent by the external input module to the central processing module. The central processing module generates a projection control instruction based on the projection operation instruction and sends it to the image processing module. The image processing module generates a projection resource acquisition instruction (e.g., an entertainment video acquisition instruction) and a projection display instruction based on the projection control instruction, and sends the projection resource acquisition instruction and projection display instruction to the communication module. The communication module sends the projection resource acquisition instruction to the projection server via the second communication terminal. The projection server obtains the corresponding projection resource (e.g., an entertainment video) based on the projection resource acquisition instruction and sends the projection resource to the communication module via the second communication terminal. The communication module sends both the received projection resource and projection display instruction to the input terminal of the DMD module. The DMD module controls the mirror structure of DMD103 to switch to a plane reflector structure based on the received projection display instruction. At this time, the DMD module projects the projection resource to the target location through the plane reflector of DMD103. The target location can be a wall or a screen. This application does not impose any restrictions on the specific content of the target location.

[0050] For example, if two operation instructions are sent to the communication module within the same unit time period, the communication module will only send one operation instruction to the DMD module at a time after receiving these two operation instructions, rather than sending both operation instructions to the DMD module at once. For example, within the same unit time period, there are two operation instructions, one for switching high beams and the other for projecting. If these two operation instructions are sent to the communication module at the same time, the communication module will not send both operation instructions to the DMD module at the same time. Instead, it will send only one operation instruction at a time, and will wait until the DMD module completes the execution of the first operation instruction before sending the other instruction. This prevents sending both operation instructions to the DMD module at the same time and affecting the normal operation of the DMD.

[0051] In order to control the projection lamp to switch to different working modes, the present application proposes a method for controlling the projection lamp, such as Figure 6 As shown, the method includes:

[0052] S601: Receive a first control instruction, where the first control instruction is used to switch a projection vehicle lamp from a high-beam lighting mode to a projection mode.

[0053] S602: When the car is in driving state, prompt the user to confirm the first control instruction.

[0054] S603: Receive a second control instruction, where the second control instruction is used to confirm or cancel the first control instruction.

[0055] S604: Control the working mode of the projection lamp according to the second control instruction.

[0056] For example, if the projection headlight is currently in high-beam mode, the central processing module receives a switching instruction, which is a projection display instruction (i.e., a first control instruction). The central processing module sends the projection display instruction to the image processing module, which then determines the vehicle's current driving state. If the vehicle is currently stationary, the image processing module sends the projection display instruction to the communication module. The communication module sends the projection display instruction to the projection server to obtain projection resources. The projection server returns the projection resources to the communication module, which then sends the projection display instruction and the projection resources together to the DMD module. The DMD module, based on the projection display instruction, controls the mirror structure of the DMD 103 of the projection headlight to switch to a flat reflector. The flat reflector reflects the projection resources to the light output module, thereby switching the projection headlight from high-beam mode to projection mode.

[0057] If the vehicle is currently in motion, the image processing module does not send the projection instruction to the communication module. Instead, it sends a verification request for the projection instruction to the central processing module. Based on the verification request, the central processing module generates a prompt message, prompting the user to confirm whether the projection instruction is indeed to be executed. If the user enters a confirmation instruction (i.e., a second control instruction) through the external input module within a preset time period (e.g., within 10 seconds), the central processing module retransmits the projection instruction to the image processing module. The image processing module transmits the projection instruction to the DMD module. Based on the projection instruction, the DMD module controls the mirror structure of the DMD 103 of the projection headlight to switch to a flat reflector. The flat reflector reflects the projection light to the light output module, thereby switching the projection headlight from high-beam lighting mode to projection mode. If the user inputs a command to cancel the execution (i.e., the second control command) through the external input module within a preset time period (e.g., within 10 seconds), or if the user does not input any command through the external input module within the preset time period (e.g., within 10 seconds), it is determined that the projection display command input by the user may have been input by mistake. In this case, the central processing module will not resend the projection display command to the image processing module, and the projection headlight will not switch from the high-beam lighting mode to the projection mode. Thus, by setting the first control command and the second control command to work together to determine whether to switch the current operating mode of the projection headlight while the vehicle is driving, the situation in which the projection headlight mode switches due to a single user error and thus causes a traffic accident is avoided.

[0058] For example, if the current projection headlight is in low-beam lighting mode, the current image processing module is processing the lighting shape of the projection headlight. For example, the low-beam lighting shape is a traffic sign (e.g., a left-turn sign). At this time, if the central processing module sends a projection projection instruction to the image processing module, the image processing module will not send the projection projection instruction to the communication module. Instead, it will send a verification request for the projection projection instruction to the central processing module. The central processing module generates a prompt message based on the verification request, prompting the user to confirm whether the projection projection instruction is indeed to be executed. If the user inputs a confirmation execution instruction (i.e., a second control instruction) through the external input module within a preset time period (e.g., within 10 seconds), the central processing module will send the projection projection instruction again to the image processing module. The image processing module will transmit the projection projection instruction to the DMD module. The DMD module will control the projection headlight to switch from low-beam lighting mode to projection mode based on the projection projection instruction. If the user inputs a command to cancel execution (i.e., the second control command) through the external input module within a preset time period (e.g., within 10 seconds), or if the user does not input any command through the external input module within a preset time period (e.g., within 10 seconds), it means that the projection display command input by the user may be input by mistake. At this time, the central processing module will not send the projection display command to the image processing module again, and at the same time, the projection headlights will not switch from the low beam lighting mode to the projection mode.

[0059] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may be modified or some of the technical features thereof may be replaced with equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention and are therefore intended to be included within the scope of protection of the present invention.

Claims

1. A projection lamp, characterized in that: include: light source; An optical transmission module, configured to transmit the light beam generated by the light source to a digital micromirror device (DMD); When the projection lamp is in projection mode and low-beam lighting mode, the DMD is used to reflect the light beam emitted by the light transmission module to the light output module through a plane reflector; When the projection lamp is in a high-beam lighting mode, the DMD is used to reflect the light beam emitted by the light transmission module to the light output module through a convex reflector. The DMD includes a plurality of rotating mirror modules. A first rotating mirror module among the plurality of rotating mirror modules includes a convex reflector and a plane reflector. The convex reflector and the plane reflector are arranged on two parallel surfaces of the first rotating mirror module. The first rotating mirror module is any one of the plurality of rotating mirror modules. The light output module is used to project or illuminate the received light beam.

2. The projection lamp according to claim 1, wherein: The light transmission module includes a collimating and shaping module, a light rod and a first convex lens. The collimation and shaping module is used to collimate and shape the light beam generated by the light source, and transmit the collimated and shaped light beam to the light rod; The light rod is used to perform light mixing processing on the light beam emitted by the collimation and shaping module; The first convex lens is used to focus the light beam emitted by the light rod.

3. The projection lamp for vehicles according to claim 2, wherein: The collimating and shaping module includes a collimating lens, a second convex lens and a concave lens. The collimating lens is used to collimate the light beam generated by the light source; The second convex lens is used to focus the light beam emitted by the collimating lens; The concave lens is used to perform parallel light processing on the light beam emitted by the second convex lens.

4. The projection lamp for vehicles according to any one of claims 1 to 3, characterized in that: Also includes: The TIR prism group is used to transmit the light beam emitted by the light transmission module to the DMD, and is also used to transmit the light beam emitted by the DMD to the light output module.

5. The projection lamp for vehicles according to any one of claims 1 to 3, characterized in that: The light source includes an RGB laser tube.

6. The projection lamp for vehicles according to claim 5, characterized in that: The light source also includes an infrared laser tube.

7. A vehicle projection system, characterized in that: include: Central processing module, image acquisition module, image processing module, communication module, projection server, DMD module, optical module and sensor module; The central processing module is connected to the output end of the image acquisition module, the output end of the optical module and the transmission end of the image processing module, respectively, and is used to receive external operation instructions, and is used to process the image data sent by the image acquisition module, and is also used to process the ambient light intensity data sent by the optical module; The image acquisition module is used to acquire road condition images and identify the road condition images; The image processing module is connected to the first communication terminal of the communication module and is used to control the working mode of the projection lamp according to the control instruction sent by the central processing module; The projection server is connected to the second communication terminal of the communication module and is used to store projection resources; The communication module is connected to the input end of the DMD module and is used to process communication information between the image processing module, the projection server and the DMD module; The DMD module is connected to the input end of the DMD and is used to control the projection lamp to switch to different working modes, wherein the DMD module includes a plurality of rotating mirror modules, and the first rotating mirror module among the plurality of rotating mirror modules includes a convex reflector and a plane reflector, and the convex reflector and the plane reflector are arranged on two parallel surfaces of the first rotating mirror module, and the first rotating mirror module is any one of the plurality of rotating mirror modules; when the projection lamp is in the projection mode and the low beam lighting mode, the first rotating mirror module is used to reflect the light beam emitted by the light transmission module to the light output module through the plane reflector; when the projection lamp is in the high beam lighting mode, the first rotating mirror module is used to reflect the light beam emitted by the light transmission module to the light output module through the convex reflector, and the projection lamp includes the DMD module, the light transmission module and the light output module; The optical module is connected to the output end of the sensor module and is used to process the ambient light intensity data sent by the sensor module; The sensor module is used to collect the ambient light intensity data.

8. A method for controlling a projection lamp, characterized in that: The method applied to the projection vehicle lamp according to any one of claims 1 to 6 comprises: receiving a first control instruction for switching the projection vehicle lamp from a high-beam lighting mode to a projection mode; When the car is in a driving state, prompting the user to confirm the first control instruction; receiving a second control instruction, where the second control instruction is used to confirm or cancel the first control instruction; The operating mode of the projection vehicle lamp is controlled according to the second control instruction.

9. A method for controlling a projection lamp, characterized in that: The projection lamp for vehicles is the projection lamp for vehicles according to any one of claims 1 to 6.

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