Headlight assembly and vehicle

Abstract

The headlight assembly includes a lens, an optical switch, and a detector. The lens is configured to focus reflected light of the target object to obtain a first light beam. The optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam. The detector is configured to detect the second light beam. The optical switch is further configured to turn off an area of ​​the optical switch corresponding to the target object and turn on another area of ​​the optical switch other than the target object based on the first image, and the first image is generated based on the second light beam.

Description

[Technical Field]

[0001] This application relates to the field of communications, and more particularly to headlight assemblies and vehicles. [Background technology]

[0002] As the most important lighting component of a vehicle, headlights play a crucial role when a vehicle travels at night. Especially on poorly lit roads, drivers need to turn on their high-beam headlights to drive safely. In this case, if there is an oncoming vehicle or a preceding vehicle, the vehicle's high-beam headlights may dazzle the driver of the oncoming or preceding vehicle, potentially endangering driving safety. Therefore, high-beam headlights with automatic anti-glare function have been developed. The anti-glare principle of high-beam headlights with automatic anti-glare function, or adaptive driving beam (ADB), is as follows: when the vehicle's sensor detects an oncoming or preceding vehicle, the headlight controller automatically turns off the high-beam headlights or the vehicle's light-emitting area corresponding to the peer vehicle, as shown in Figure 1.

[0003] To implement the ADB function, the vehicle's sensors need to detect the orientation of the object. Currently, the mainstream sensor is a common camera. The main component of a common camera is a complementary metal-oxide-semiconductor (CMOS) chip. Generally, the higher the resolution, the higher the price. Furthermore, the camera is usually located at the rearview mirror position and behind the windshield. When the ADB function is implemented, coordinate transformation needs to be performed based on the position of the camera and the position of the headlight. Therefore, the relative positions of the headlight and camera need to be calibrated before delivery. Summary of the Invention

[0004] Embodiments of the present application provide a headlight assembly that efficiently implements anti-glare functionality at low cost.

[0005] According to a first aspect, a headlight assembly is provided, including a lens, an optical switch, and a detector. The lens is configured to focus reflected light from a target object to obtain a first light beam. The optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam. The detector is configured to detect the second light beam. The optical switch is further configured to turn off an area of ​​the optical switch corresponding to the target object and turn on other areas of the optical switch other than the target object based on the first image, and the first image is generated based on the second light beam.

[0006] The optical switch is used in the headlight to perform imaging of an external object, and the area on the optical switch corresponding to the object is turned off, thereby realizing the effect of turning off part of the headlight's illumination area to achieve the purpose of anti-glare. Furthermore, the common camera is no longer used for imaging, and the process in the prior art where coordinate transformation is required between the camera position and the headlight position is also avoided, thereby improving efficiency and reducing costs.

[0007] With reference to implementations of the first aspect, in a first possible implementation of the first aspect, configuring the optical switch to reflect the first light beam based on the modulation mode to obtain the second light beam includes configuring the optical switch to turn on a first area on the optical switch and turn off a second area on the optical switch based on the modulation mode, and the second light beam includes light reflected by the first area.

[0008] With reference to the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the headlight assembly further includes an optical switch controller, wherein the optical switch controller is configured to control the optical switch to reflect the first light beam based on the modulation mode.

[0009] With reference to the first aspect or any one of the first and second possible implementations of the first aspect, in a third possible implementation, the optical switch has a plurality of optical devices, and the optical switch being configured to reflect the first light beam based on the modulation mode includes the plurality of optical devices being configured to reflect the first light beam based on the modulation mode.

[0010] With reference to the first aspect or any one of the first to third possible implementations of the first aspect, in a fourth possible implementation, the optical switch controller is configured to control the optical devices in the first area to be turned on and control the optical devices in the second area to be turned off.

[0011] With reference to the first aspect or the first to fourth possible implementations of the first aspect, in a fifth possible implementation, the optical switch controller is configured to control optical devices in an area corresponding to the target object to be turned off, and control optical devices in other areas other than the target object to be turned on.

[0012] The optical devices in the area corresponding to the target object are turned off to implement an anti-glare effect for the target object, and the optical devices in other areas other than the target object are turned on to implement a lighting effect.

[0013] With reference to the first aspect or the first to fifth possible implementations of the first aspect, in a sixth possible implementation there are a plurality of modulation modes, each modulation mode corresponding to one second light beam.

[0014] With reference to the first aspect or the first to sixth possible implementations of the first aspect, in a seventh possible implementation, the greater the number of pixels corresponding to the optical device, the greater the number of modulation modes.

[0015] With reference to the first aspect or the first to seventh possible implementations of the first aspect, in an eighth possible implementation, the headlight assembly further includes a processing module, the processing module being configured to generate a second image based on a detection result obtained by the detector by detecting the second light beam, the second image including the target object, and the processing module being further configured to detect a corresponding area of ​​the target object on the second image and generate a first image based on the corresponding area.

[0016] A portion of the area on the optical switch is turned on or off based on a plurality of modulation modes, and a second image is generated by a processing module based on the detection result of the detector to achieve the effect of reconstructing an external environment image.

[0017] With reference to the first aspect or the first to eighth possible implementations of the first aspect, in a ninth possible implementation, the optical switch is a Digital Micromirror Device (DMD).

[0018] With reference to the first aspect or the first to ninth possible implementations of the first aspect, in a tenth possible implementation the optical switch is a Liquid Crystal on Silicon (LCOS).

[0019] With reference to the first aspect or the first to tenth possible implementations of the first aspect, in an eleventh possible implementation, the headlight assembly includes a polarization conversion system. (polarization conversion system, PCS ) the PCS further includes a target for obtaining the first light beam. Object The polarizer is configured to polarize the collected reflected light.

[0020] With reference to the first aspect or the first to eleventh possible implementations of the first aspect, in a twelfth possible implementation, the headlight assembly further includes a headlight light source, and the optical switch is further configured to reflect light emitted by the headlight light source.

[0021] With reference to the first aspect or the first to twelfth possible implementations of the first aspect, in a thirteenth possible implementation, the headlight assembly further includes a synchronization module, and the synchronization module is configured to control the headlight light source, the detector, and the processing module, and when the detector and the processing module operate, the headlight light source does not emit light, or when the headlight light source emits light, the detector and the processing module do not operate.

[0022] According to a second aspect, there is provided a vehicle including a headlight assembly according to the first aspect or any one of the implementations of the first aspect.

[0023] According to a third aspect, a headlight anti-glare method is provided, which is applied to a headlight assembly according to the first aspect or any one of the implementations of the first aspect. When an area corresponding to a target object is turned off, light emitted by the headlight light source and reflected by that area of ​​the target object does not illuminate the target object, thereby achieving an anti-glare effect.

[0024] According to a fourth aspect, there is provided an imaging assembly including a lens, an optical switch, a detector, a color wheel, and a light source. The light source, the color wheel, and the optical switch are configured to present a first picture. The lens is configured to focus reflected light from a target object to obtain a first light beam. The optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam. The detector is configured to detect the second light beam. The light source, the color wheel, and the optical switch are further configured to present a second picture based on the first image, the first image being generated based on the second light beam.

[0025] The optical switch is used in the projection device to perform imaging of an external object, and the user's next operation is determined based on the imaging result to achieve the effect of presenting the user with the picture acquired after the operation. Furthermore, the common camera is no longer used for imaging, and the cost is reduced.

[0026] With reference to implementations of the fourth aspect, in a first possible implementation of the fourth aspect, configuring the optical switch to reflect the first light beam based on the modulation mode includes configuring the optical switch to turn on a first area on the optical switch and turn off a second area on the optical switch based on the modulation mode, and the second light beam includes light reflected by the first area.

[0027] With reference to the fourth aspect or the first possible implementation of the fourth aspect, in a second possible implementation, the imaging assembly further includes a processing module, and the processing module is configured to generate a first image based on a detection result obtained by the detector by detecting the second light beam, and the first image instructs the optical switch to turn on or off a portion of an area on the optical switch.

[0028] With reference to the fourth aspect or any one of the first and second possible implementations of the fourth aspect, in a third possible implementation, before generating the first image, the processing module is configured to generate a second image based on the detection result, the second image including the target object, and the processing module is further configured to detect a corresponding area of ​​the target object on the second image and generate the first image based on the corresponding area.

[0029] With reference to the fourth aspect or any one of the first to third possible implementations of the fourth aspect, in the fourth possible implementation, the optical switch is a digital micromirror device. ( DMD ) is.

[0030] With reference to the fourth aspect or any one of the first to fourth possible implementations of the fourth aspect, in a fifth possible implementation, the optical switch is a liquid crystal on silicon. ( LCOS ) is.

[0031] With reference to the fourth aspect or any one of the first to fifth possible implementations of the fourth aspect, in a sixth possible implementation, the imaging assembly includes a polarization conversion system. ( PCS ) the PCS further includes a target for obtaining the first light beam. Object The polarizer is configured to polarize the collected reflected light.

[0032] According to a fifth aspect, there is provided a projection device including an imaging assembly according to the fourth aspect or any one of the implementations of the fourth aspect.

[0033] In order to describe the embodiments of the present application or the technical solutions in the prior art more clearly, the following will briefly describe the accompanying drawings in the description of the embodiments and the prior art. [Brief explanation of the drawings]

[0034] [Figure 1] FIG. 1 is a schematic diagram of an anti-glare headlight. [Figure 2] 1 is a schematic diagram of a structure of a headlight assembly according to an embodiment of the present application; [Figure 3] FIG. 1 is a schematic diagram of a structure of a headlight assembly implemented by using a DMD according to an embodiment of the present application. [Figure 4] 1 is a schematic diagram of a structure of a headlight assembly implemented by using LCOS according to an embodiment of the present application; [Figure 5] FIG. 2 is a schematic diagram of the structure of an imaging assembly implemented by using a DMD, according to an embodiment of the present application. [Figure 6]1 is a schematic diagram of a structure of an imaging assembly implemented by using LCOS according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0035] Digital Micromirror Device ( DMD ) The DMD is a pixel matrix containing multiple micromirrors, and the direction of the incident light can be adjusted by rotating the reflector. The size of the matrix corresponds to the resolution of the DMD, for example, 800x600, 1024x768, 1280x720, and 1920x1080. Each micromirror in the DMD is It can be turned on or off separately.

[0036] Liquid Crystal on Silicone ( LCOS ) is a very small size liquid crystal display device based on the reflective mode. Each pixel is turned on and off by using a separate circuit. The LCOS controls the projected display image by modulating the phase and intensity of the incident light. The size of the pixel matrix corresponds to the resolution of the LCOS. The incident light is converted into polarized light by a Polarization Conversion System (PCS). When the liquid crystal is modulated by an external signal and is at a bright display level, after the polarized light is modulated by the LCOS, the polarization direction is rotated by 90 degrees and the light is displayed in a bright state. When the liquid crystal is at a dark display level, after the polarized light is modulated, the polarization direction remains unchanged and the light is displayed in a dark state.

[0037] FIG. 2 is a schematic diagram of the structure of a headlight assembly according to an embodiment of the present application.

[0038] The headlight assembly includes a lens, an optical switch, and a detector. The lens is configured to focus reflected light from a target object outside the headlight to obtain a first light beam. The target object may be a vehicle, a pedestrian, a road sign, a traffic light, etc. One or more lenses may be present. The first light beam is incident on the optical switch. The optical switch may be a DMD or an LCOS. The optical switch has multiple optical devices. When the optical switch is implemented using a DMD, the multiple optical devices include a pixel matrix including multiple micromirrors. When the optical switch is implemented using an LCOS, the multiple optical devices include a pixel matrix including liquid crystal on silicon. The optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam.

[0039] The headlight assembly may further include an optical switch controller. The optical switch controller is configured to control the optical switch to reflect the first light beam based on the modulation mode. Specifically, when the optical switch is implemented using a DMD, the optical switch controller is a DMD driver. When the optical switch is implemented using an LCOS, the optical switch controller is an LCOS driver. Specifically, the optical switch controller is configured to control the optical devices of the optical switch to reflect the first light beam based on the modulation mode.

[0040] One modulation mode may be referred to as one mask. The modulation modes may be preset or randomly generated. There may be multiple modulation modes. The optical switch obtains a corresponding second light beam in each modulation mode through reflection. Thus, one modulation mode corresponds to one second light beam. When reflecting the first light beam based on the multiple modulation modes, the optical switch obtains multiple second light beams. The higher the resolution of the optical switch, the greater the number of modulation modes. In other words, the greater the number of pixels corresponding to the optical device, the greater the number of modulation modes.

[0041] Each modulation mode corresponds to turning on some areas on the optical switch and turning off some areas. A detector can detect light reflected by the turned-on areas on the optical switch. Based on each modulation mode, the optical switch turns on a first area of ​​the optical switch and turns off a second area of ​​the optical switch. A second light beam includes light reflected by the first area. A detector is configured to detect the second light beam.

[0042] Specifically, the optical switch controller controls the optical devices in the first area to be turned on and the optical devices in the second area to be turned off. When the optical switch is implemented by using a DMD, the DMD driver controls the micromirrors in the first area of ​​the DMD to be turned on and the micromirrors in the second area to be turned off. Light reflected by the micromirrors in the first area can be detected by a detector, and light reflected by the micromirrors in the second area cannot be detected by the detector. When the optical switch is implemented by using an LCOS, the LCOS driver controls the liquid crystals in the first area of ​​the LCOS to be turned on and the liquid crystals in the second area to be turned off. The liquid crystals that are turned on are in a bright display level state, and the liquid crystals that are turned off are in a dark display level state. The light reflected by the liquid crystals in the first area can be detected by a detector, and the light reflected by the liquid crystals in the second area cannot be detected by the detector. Reflected The light cannot be detected by the detector, which may be a photodetector.

[0043] For light reflected by the turned-off area on the optical switch, an absorber may be added to shield the light so that the detector does not detect it. Alternatively, the direction of reflection of the turned-off area may be adjusted so that the detector does not detect the light.

[0044] After detecting the second light beam, the detector sends the detection result to a processing module. The processing module generates a second image based on the detection result, where the second image is a reconstructed image including the external target object. In an implementation, the detection result includes light intensity values. When the light intensity values ​​sent by the detector to the processing module accumulate to a certain amount, the processing module reconstructs the image including the external target object by using a compression-based reconstruction algorithm. The purpose of the algorithm is to restore the external image by using the light intensity data detected by the detector.

[0045] For example, the optical switch is implemented by using a DMD. The reconstruction algorithm is as follows:

[0046] It is assumed that the original image of the captured external image is I, and I is the image that needs to be reconstructed by using a reconstruction algorithm. It is assumed that the mask of the DMD is P, and the signal detected by the detector is S. In this case, S=P×I, where S and I are vectors, and P is a matrix. The intermediate result can be u=WI, and the following minimization problem is solved to find u:

number

[0047] Therefore, u=WW T u.

[0048] where W is the wavelet transform matrix or compact frame transform matrix. The reconstructed image I is then calculated using the formula I=W T This model can be found by using the alternating direction multiplier method. (alternating direction method of multipliers, ADMM ) It can be solved by using

[0049] After acquiring the second image, the processing module detects an area on the second image corresponding to an external target object and generates a first image based on the area corresponding to the target object. The target object can be detected by headlight detection or deep learning-based target detection, such as Faster-RCNN and Yolo. The target object can be a person, a vehicle, the taillights of a preceding vehicle, or the headlights or driver of an oncoming vehicle. In implementation, the first image is a black-and-white image, where the area on the first image corresponding to the target object is black and the other areas are white. Based on the first image, the optical switch turns off the area of ​​the optical switch corresponding to the target object and turns on the other areas on the optical switch other than the target object.

[0050] Specifically, the optical switch controller controls the optical devices in the area of ​​the optical switch corresponding to the target object. off and controls the optical device in other areas other than the target object on the optical switch. on When the optical switch is implemented by using a DMD, the processing module sends the first image to a DMD driver, and the DMD driver controls micromirrors in an area of ​​the DMD corresponding to the target object to be turned off and controls micromirrors in other areas to be turned on based on the first image. When the optical switch is implemented by using an LCOS, the processing module sends the first image to an LCOS driver, and the LCOS driver controls liquid crystals in an area of ​​the LCOS corresponding to the target object to be turned off and controls liquid crystals in other areas to be turned on based on the first image.

[0051] Then, the light emitted by the headlight light source is incident on the optical switch, and due to reflection by the optical switch, the light reflected by areas other than the target object is emitted from the headlight and illuminates the external environment, while the light reflected by the area corresponding to the target object is not emitted from the headlight and does not illuminate the target object, thus achieving an anti-glare effect.

[0052] The processing module may be part of the headlight assembly or part of the headlight, or may be located on the vehicle but outside the headlight.

[0053] The headlight assembly further includes a synchronization module configured to control the headlight light source, the detector, and the processing module so that the headlight light source, the detector, and the processing module operate at different times, specifically, when the detector and processing module operate, the headlight light source does not emit light, or when the headlight light source emits light, the detector and processing module does not operate.

[0054] The headlight source may be part of the headlight assembly or may be external to the headlight assembly.

[0055] FIG. 3 is a schematic diagram of a headlight assembly structure implemented by using a DMD according to an embodiment of the present application. In FIG. 3, the optical switch is implemented by using a DMD. The optical switch controller is a DMD driver, and the processing module is implemented by using a CPU. The headlight light source, processing module, and detector are controlled by using a synchronization module so that the headlight light source is turned off when the DMD, detector, processing module, and DMD driver perform imaging of an external object. In this way, the headlight light source does not affect imaging of the external object. The headlight assembly may further include a reflector configured to reflect light emitted by the headlight light source to the DMD.

[0056] See the step numbers in Figure 3. Light from an object outside the headlight enters the DMD through the lens (1). The DMD turns on or off part of the area based on the modulation mode, and the light reflected by the DMD is detected by the detector (2). The detector outputs light intensity values ​​to the processing module (3). When the light intensity values ​​output by the detector to the processing module accumulate to a certain amount, the processing module reconstructs an image including the external object by using a compression-based reconstruction algorithm. After the reconstructed image is obtained, the processing module detects an object (e.g., a person or a vehicle) in the reconstructed image and sends an image to the DMD driver (4), in which the area corresponding to the object is black and the other area is white. The DMD driver turns on or off the corresponding area of ​​the DMD based on this image. Then, light emitted by the headlight light source enters the DMD through the reflector (6), and no light is emitted from the turned-off area of ​​the DMD (7), thereby achieving an anti-glare effect.

[0057] FIG. 4 is a schematic diagram of a headlight assembly structure implemented using LCOS according to an embodiment of the present application. In FIG. 4, the optical switch is implemented using LCOS. The optical switch controller is an LCOS driver, and the processing module is implemented using a CPU. The headlight light source, processing module, and detector are controlled using a synchronization module so that the headlight light source is turned off when the LCOS, detector, processing module, and LCOS driver perform imaging of an external object. In this way, the headlight light source does not affect the imaging of the external object. Based on a different liquid crystal imaging principle, the headlight assembly may include a PCS configured to convert incident light into polarized light. The PCS may convert the incident light into S-polarized light or P-polarized light. The headlight assembly may further include a polarization beam splitter (PBS) configured to reflect or transmit polarized light. The PBS can reflect different polarized light based on different types of reflective film applied to the PBS. For example, if a reflective film that reflects only S-polarized light is applied to the PBS, the PBS will only reflect S-polarized light and not P-polarized light. P-polarized light passes through the PBS. Below, we will use an example where the polarized light converted by PCS1 is P-polarized, the polarized light converted by PCS2 is S-polarized, and a reflective film that reflects only S-polarized light is coated on the PBS for explanation (if the polarized light converted by PCS1 is S-polarized and the polarized light converted by PCS2 is P-polarized, a reflective film that reflects only P-polarized light must be coated on the PBS).

[0058] See the step numbers in Figure 4. Light from an object outside the headlight passes through the lens and is converted to P-polarized light by PCS1. The P-polarized light enters the LCOS (1). The LCOS turns on or off a portion of the area based on the modulation mode. After being reflected by the LCOS, the P-polarized light becomes S-polarized light and is detected by the detector (2). The detector outputs light intensity values ​​to the processing module (3). When the light intensity values ​​output by the detector to the processing module accumulate to a certain amount, the processing module reconstructs an image including the external object by using a compression-based reconstruction algorithm. After the reconstructed image is obtained, the processing module detects an object (e.g., a person or vehicle) in the reconstructed image and sends an image to the LCOS driver (4), in which the area corresponding to the object is black and the other area is white. The LCOS driver turns on or off the corresponding area of ​​the LCOS based on this image. Then, the light emitted by the headlight light source is converted to S-polarized light by PCS2 (6 and 7). After being reflected by the PBS, the S-polarized light enters the LCOS (8). No light is emitted from the turned-off areas of the LCOS. The light reflected by the turned-on areas of the LCOS changes from S-polarized light to P-polarized light. The P-polarized light passes through the PBS and is emitted through the lens (9). In this way, the anti-glare effect is achieved.

[0059] For the process of reconstructing an image and performing object detection by the processing module in Figures 3 and 4, please refer to the relevant description of the embodiment in Figure 2. The details will not be described again.

[0060] From the above, it can be seen that an optical switch is used in a headlight to perform imaging of an external object, and the area on the optical switch corresponding to the object is turned off, thereby realizing the effect of turning off part of the illumination area of ​​the headlight to achieve the purpose of anti-glare.Furthermore, the process in the prior art that needs to perform coordinate transformation between the position of the camera and the position of the headlight is also avoided.

[0061] 5 and 6 are schematic diagrams of the structure of an imaging assembly according to an embodiment of the present application, respectively. In FIG. 5, the optical switch is implemented by using a DMD. In FIG. 5, the optical switch is implemented by using an LCOS. The specific imaging process is similar to that in the embodiments of FIGS. 2, 3, and 4, and the details will not be described again here.

[0062] An imaging assembly may be applied to a projection device. The imaging assembly may be configured to detect a position and a movement of a user's hand, determine a current user operation based on the position and a movement of the user's hand, update a projected picture based on the user operation, and wait for a next user operation. For example, if the projection device is currently projecting an application picture, the application picture may include an icon button, and the imaging assembly detects a user tap on the icon button, the next picture presented by the imaging assembly is a picture obtained after the application is entered. Alternatively, for example, if the projection device is currently projecting a photo, and the imaging assembly detects a user double-tap on the photo, the next picture presented by the imaging assembly is an enlarged version of the photo.

[0063] The above is merely a specific implementation of the present application and is not intended to limit the scope of protection of the present application. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should fall within the scope of protection of the present application. Therefore, the scope of protection of the present application should be governed by the scope of protection of the claims.

Claims

1. A headlight assembly having a lens, an optical switch, and a detector, the lens is configured to focus reflected light from the target object to obtain a first light beam; the optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam; the detector is configured to detect the second light beam; the optical switch is further configured to turn off a first area of ​​the optical switch corresponding to the target object and turn on a second area of ​​the optical switch other than the target object based on a first image, the first image being generated based on the second light beam; the headlight assembly further comprises a processing module; the processing module is configured to generate a second image based on detection results obtained by the detector by detecting the second light beam, the detection results including light intensity values, and when the light intensity values ​​sent by the detector to the processing module accumulate to a certain amount, the processing module reconstructs the second image, which is a reconstructed image including the target object, by using a compressive perceptual based reconstruction algorithm; the processing module is further configured to detect an area on the second image corresponding to the target object, and generate the first image in which the corresponding area is distinguished from a remaining area on the second image other than the corresponding area. Headlight assembly.

2. The optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam. the optical switch is configured to turn on a third area on the optical switch and turn off a fourth area on the optical switch based on the modulation mode; the second light beam includes light reflected by the third area; 10. The headlight assembly of claim 1.

3. the headlight assembly further comprising an optical switch controller; the optical switch controller is configured to control the optical switch to reflect the first light beam based on the modulation mode.

10. The headlight assembly of claim 1.

4. the optical switch includes a plurality of optical devices; The optical switch is configured to reflect the first light beam based on a modulation mode. the plurality of optical devices are configured to reflect the first light beam based on the modulation mode; the optical switch controller is configured to control optical devices in a third area on the optical switch to be turned on and to control optical devices in a fourth area on the optical switch to be turned off.

4. The headlight assembly of claim 3.

5. the optical switch controller is configured to control optical devices in the first area corresponding to the target object to be turned off, and control optical devices in the second area other than the target object to be turned on; 5. The headlight assembly of claim 4.

6. There are a plurality of modulation modes, each modulation mode corresponding to one second light beam.

10. The headlight assembly of claim 1.

7. The greater the number of pixels corresponding to the optical devices included in the optical switch, the greater the number of modulation modes.

7. The headlight assembly of claim 6.

8. The optical switch is a digital micromirror device (DMD).

10. The headlight assembly of claim 1.

9. the optical switch is liquid crystal on silicon (LCOS); 10. The headlight assembly of claim 1.

10. the headlight assembly further comprising a polarization conversion system (PCS); the PCS is configured to polarize the collected reflected light of the target object to obtain the first light beam.

10. The headlight assembly of claim 9.

11. The headlight assembly further includes a headlight light source; the optical switch is further configured to reflect light emitted by the headlight light source.

10. The headlight assembly of claim 1.

12. the headlight assembly further comprising a processing module and a synchronization module; the processing module is configured to generate a second image based on a detection result obtained by the detector by detecting the second light beam, and the synchronization module is configured to control the headlight light source, the detector, and the processing module; When the detector and the processing module are operating, the headlight light source does not emit light, or when the headlight light source emits light, the detector and the processing module are not operating.

12. The headlight assembly of claim 11.

13. A vehicle comprising a headlight assembly according to any one of claims 1 to 12.

14. An imaging assembly having a lens, an optical switch, a detector, a color wheel, and a light source, the optical switch is configured to reflect light emitted by the light source, and the color wheel is configured to add color to the light reflected by the optical switch so as to present a first picture; the lens is configured to focus reflected light from the target object to obtain a first light beam; the optical switch is configured to reflect the first light beam based on a modulation mode to obtain a second light beam; the detector is configured to detect the second light beam; the optical switch is further configured to reflect the light emitted by the light source based on a first image, and the color wheel is further configured to add color to the light reflected by the optical switch based on the first image to present a second picture, the content of the second picture being different from the content of the first picture, and the first image being generated based on the second light beam; the imaging assembly further comprising a processing module; the processing module is configured to generate a second image based on detection results obtained by the detector by detecting the second light beam, the detection results including light intensity values, and when the light intensity values ​​sent by the detector to the processing module accumulate to a certain amount, the processing module reconstructs the second image, which is a reconstructed image including the target object, by using a compressive perceptual based reconstruction algorithm; the processing module is further configured to detect an area on the second image corresponding to the target object, and generate the first image in which the corresponding area is distinguished from a remaining area on the second image other than the corresponding area; the first image instructs the optical switch to turn on or off a portion of an area on the optical switch; Imaging assembly.

15. The optical switch is configured to reflect the first light beam based on a modulation mode. the optical switch is configured to turn on a first area on the optical switch and turn off a second area on the optical switch based on the modulation mode; the second light beam includes light reflected by the first area; 15. The imaging assembly of claim 14.

16. The optical switch is a digital micromirror device (DMD).

15. The imaging assembly of claim 14.

17. the optical switch is liquid crystal on silicon (LCOS); 15. The imaging assembly of claim 14.

18. the imaging assembly further comprising a polarization conversion system (PCS); the PCS is configured to polarize the collected reflected light of the target object to obtain the first light beam.

18. The imaging assembly of claim 17.

19. A projection device comprising an imaging assembly according to any one of claims 14 to 18.

Images