Automobile headlamp using liquid crystal display and having infrared function

Abstract

The utility model belongs to the field of automobile light accessories, and particularly relates to an automobile headlamp with an infrared function using liquid crystal display, which comprises an LED light source, a filter lens, an integral rod component, a liquid crystal component, a lens and a radar system. A white-light LED of the LED light source is horizontally arranged, an infrared LED is perpendicular to the white-light LED, and a filter lens is arranged at the intersection of light rays of the white-light LED and the infrared LED; the integral rod assembly and the white light LED are coaxially arranged, and the integral rod assembly receives light from the white light LED or the infrared LED; the liquid crystal assembly and the lens are both arranged behind the integral rod assembly, and light of the white light LED passing through the integral rod assembly enters the liquid crystal assembly; the liquid crystal assembly is connected with the radar system so as to display a specific shape according to a signal sent by the radar system, and the lens transmits a liquid crystal image to the front of a vehicle so as to realize the functions of high and low beams, meeting and AFS; the infrared light of the infrared LED is reflected by the filter lens, is reflected to the liquid crystal full screen through the integral rod assembly, and is emitted to the distance through the lens so as to provide an infrared light source.

Description

Technical Field

[0001] This utility model belongs to the field of automotive lighting accessories, specifically a car headlight with infrared function using an LCD display. Background Technology

[0002] Currently, automotive headlights offer functions such as high beam, low beam, AFS (Adaptive Front-lighting), and other custom graphics. Each of these functions requires a separate lamp or module. In fact, headlights often consist of multiple lamps or modules. Furthermore, traditional automotive headlights require multiple independent modules (such as high beam, low beam, and AFS systems) to achieve different functions, resulting in complex structures, large sizes, and high costs. In addition, existing technologies typically require a separate infrared light source, increasing system redundancy and energy consumption. With the development of intelligent driving technology, headlights need to work in conjunction with sensors such as radar and cameras to achieve dynamic lighting. However, traditional multi-module systems struggle to respond quickly to complex signals and lack integrated infrared detection capabilities. Therefore, there is an urgent need for a highly integrated headlight solution that supports multi-mode dynamic switching and also incorporates an infrared light source to meet the demands for intelligentization, lightweight design, and cost optimization. Utility Model Content

[0003] The purpose of this invention is to provide an automotive headlight with infrared function using a liquid crystal display. It uses LED as the light source and liquid crystal as the light pattern control device. The image displayed on the liquid crystal is determined by a signal algorithm given by radar. It integrates low beam, high beam, oncoming traffic, AFS and infrared light source functions.

[0004] The technical solution adopted by this utility model to achieve the above objectives is: a car headlight with infrared function using liquid crystal display, comprising: an LED light source, a filter, an integrating bar assembly, a liquid crystal assembly, a lens, and a radar system;

[0005] The LED light source includes: white LEDs and infrared LEDs;

[0006] The white LED is placed horizontally, and the infrared LED is set perpendicular to the white LED. A filter is placed at the intersection of the two lights.

[0007] The integrating rod assembly is coaxially arranged with the white LED, and the integrating rod assembly receives light from the white LED or the infrared LED;

[0008] The liquid crystal component and the lens are both located behind the integrating bar component. The light from the white LED of the integrating bar component is incident on the liquid crystal component. The liquid crystal component is connected to the radar system to display a specific shape according to the signal sent by the radar system. The lens transmits the liquid crystal image to the front of the vehicle to realize the functions required for high beam, low beam, oncoming traffic, and AFS.

[0009] The infrared light from the infrared LED is reflected by a filter, passes through an integrating bar assembly, and is reflected onto the liquid crystal assembly, illuminating the entire LCD screen. The light is then projected through a lens to provide an infrared light source for distant objects.

[0010] The filter is a bi-color filter that reflects infrared light and transmits visible light; the filter is positioned at a 45° angle to the white LED and the infrared LED.

[0011] The light from the white LED is horizontally incident on the integrating rod assembly through a filter, while the light from the infrared LED is refracted by the filter onto the integrating rod assembly.

[0012] The integrating bar assembly includes: a front lens group, an integrating bar, and a rear lens group arranged sequentially along the optical axis;

[0013] The front lens group collimates and couples the incident light to the incident end face of the integrating bar;

[0014] The front lens group includes: at least one plano-convex lens or aspherical lens with its convex surface facing the incident direction, the focal length of which is adapted to the length of the integrating rod to achieve parallelization of the incident beam.

[0015] The integrating rod is a regular column made of light-transmitting material, and its sidewalls are provided with a total reflection layer; the light emitted from the integrating rod is focused by the rear lens group and then incident on the lens or liquid crystal assembly.

[0016] Adjustable mechanical supports are provided between the front lens group and the incident end face of the integrating rod, and between the exit end face of the integrating rod and the rear lens group; the mechanical supports are a locking ring and fine-tuning threaded structure.

[0017] The rear lens group is a biconvex lens or an achromatic lens group, and its radius of curvature corresponds to the size of the target focused spot.

[0018] The integrating rod has antireflection coatings on both ends and its operating wavelength covers the visible to near-infrared range; the cross-section of the integrating rod is rectangular, hexagonal or circular.

[0019] The integrating rod is a fused silica rod structure, an optical glass rod structure, or a transparent ceramic rod structure.

[0020] The lens includes: a reflector and a cylindrical lens;

[0021] The cylindrical lens and the liquid crystal assembly are coaxially and symmetrically arranged on both sides of the rear lens group of the integrating rod assembly, and the light emitted from the integrating rod assembly is perpendicular to the axis of the cylindrical lens or the liquid crystal assembly.

[0022] The reflector and the integrating bar assembly are coaxially arranged, and the reflector is placed at an angle of 45° to 60°. The light emitted from the integrating bar assembly is refracted by the reflector and enters the liquid crystal assembly. The liquid crystal assembly transmits the liquid crystal image through a cylindrical lens to the front of the vehicle.

[0023] The lens is a cylindrical lens; the integrating bar assembly, the liquid crystal assembly, and the cylindrical lens are arranged coaxially in sequence.

[0024] The liquid crystal assembly includes: a front polarizer, a liquid crystal layer, a rear polarizer, a control circuit board, and a thermally conductive substrate.

[0025] The front polarizer is a high-transmittance resin lens with a nano-scale polarizing coating on its surface.

[0026] The liquid crystal layer is disposed behind the front polarizer; the liquid crystal layer contains multiple liquid crystal cells arranged in an array, and each liquid crystal cell independently controls the light flux.

[0027] The rear polarizer is arranged in a polarization direction orthogonal to the front polarizer;

[0028] The thermally conductive substrate is attached to the back side of the rear polarizer and has a built-in micro heat pipe heat dissipation structure.

[0029] The control circuit board is connected to the radar system.

[0030] The control circuit board includes: a driving module, a signal processing module, and a light pattern generation algorithm module;

[0031] The driving module is electrically connected to the liquid crystal unit via a matrix of electrodes;

[0032] The signal processing module is connected to the optical pattern generation algorithm module and the radar system respectively to analyze the vehicle image parameters input by the radar system and to calculate the required optical distribution pattern in real time through the optical pattern generation algorithm module.

[0033] This utility model has the following beneficial effects and advantages:

[0034] 1. This utility model achieves a high degree of integration: through the linkage control of the liquid crystal component and the radar system, the functions of high beam, low beam, oncoming vehicle shielding, AFS and infrared light source are integrated into a single module, which significantly reduces the size and manufacturing cost.

[0035] 2. This utility model has dynamic response capability: based on real-time data input by radar, the liquid crystal light pattern generation algorithm can quickly adjust the lighting mode (such as automatic avoidance of oncoming vehicles and pedestrian recognition enhancement) to improve driving safety.

[0036] 3. The infrared function of this utility model is reusable: by utilizing a dual-color filter and a coaxial optical path design, the infrared light source and visible light share the integrating bar and liquid crystal component, reducing additional hardware requirements and enhancing the compatibility of night vision and ADAS sensors.

[0037] 4. The heat dissipation and reliability of this utility model are optimized: the liquid crystal module has a built-in micro heat pipe heat dissipation structure to ensure that the high-power LED and liquid crystal unit work stably for a long time and extend their service life.

[0038] 5. The present invention features a time-division multiplexing design for white light and infrared LEDs, combined with the precise light control characteristics of liquid crystal, to reduce ineffective light output and improve overall energy utilization. Attached Figure Description

[0039] Figure 1 A schematic diagram of the structure of one embodiment of the automotive headlight of this utility model;

[0040] Figure 2 A schematic diagram of another embodiment of the automotive headlight of this utility model;

[0041] Among them, 1 is a white LED, 2 is an infrared LED, 3 is a filter, 4 is an integrating bar assembly, 5 is a liquid crystal assembly, 6 is a reflector, 7 is a cylindrical lens, and 8 is a radar system. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0043] An infrared-enabled automotive headlight using a liquid crystal display is characterized by comprising: an LED light source, a filter 3, an integrating bar assembly 4, a liquid crystal assembly 5, a lens, and a radar system 8.

[0044] The LED light source includes: white LED1 and infrared LED2; the white LED1 in this utility model is a commercially available product, such as Cree XLamp XHP70.2, which has high brightness and a wide color temperature range and is suitable for automotive-grade lighting requirements.

[0045] The infrared LED2 is a commercially available product. It can be an Osram SFH 4735 with a wavelength of 850nm and an output power of 1.5W, suitable for night vision supplementary lighting.

[0046] White LED1 is placed horizontally, infrared LED2 is set perpendicular to white LED2, and filter 3 is placed at the intersection of their light rays;

[0047] The integrating bar assembly 4 is coaxially arranged with the white LED 1, and the integrating bar assembly 4 receives light from the white LED 1 or the infrared LED 2;

[0048] The liquid crystal component 5 and the lens are both located behind the integrating bar component 4. The light from the white LED 1 of the integrating bar component 4 is incident on the liquid crystal component 5. The liquid crystal component 5 is connected to the radar system 8 to display a specific shape according to the signal sent by the radar system 8. The lens transmits the liquid crystal image to the front of the vehicle to realize the functions required for high beam, low beam, oncoming traffic and AFS.

[0049] Among them, radar system 8 uses Bosch LRR4, which has a long-range radar with a detection range of 250m, supports CAN bus communication, and has the function of seamless integration with optical algorithms.

[0050] The infrared light from the infrared LED2 is reflected by the filter 3, passes through the integrating bar assembly 4, and is reflected onto the liquid crystal assembly 5, illuminating the entire liquid crystal screen. The light is then projected into the distance through the lens to provide an infrared light source.

[0051] Filter 3 is a dichroic filter, and it reflects infrared light while transmitting visible light.

[0052] Among them, the dual-color filter is Thorlabs FBH800-40, which has a visible light transmittance of >90%, an infrared reflectance of >95%, and is installed at a 45° angle to adapt to the optical path design.

[0053] Filter 3 is positioned at a 45° angle to the light from white LED 1 and infrared LED 2.

[0054] The light from the white LED1 passes horizontally through the filter 3 and is incident on the integrating rod assembly 4, while the light from the infrared LED2 is refracted through the filter 3 and is incident on the integrating rod assembly 4.

[0055] The integrating bar assembly 4 includes: a front lens group, an integrating bar, and a rear lens group arranged sequentially along the optical axis;

[0056] The front lens group collimates and couples the incident light rays to the incident end face of the integrating bar;

[0057] The front lens group includes: at least one plano-convex lens or aspherical lens with its convex surface facing the incident direction, the focal length of which is adapted to the length of the integrating rod to achieve parallelization of the incident beam.

[0058] The integrating rod is a regular column made of light-transmitting material, and its sidewalls are provided with a total reflection layer; the light emitted from the integrating rod is focused by the rear lens group and then enters the lens or liquid crystal component 5;

[0059] Adjustable mechanical supports are provided between the front lens group and the incident end face of the integrating bar, and between the exit end face of the integrating bar and the rear lens group; the mechanical supports are a locking ring and fine-tuning thread fit structure.

[0060] The rear lens group is a biconvex lens or an achromatic lens group, and its radius of curvature corresponds to the size of the focused spot of the target.

[0061] The integrating rod has antireflection coatings on both ends and operates in the visible to near-infrared range; the cross-section of the integrating rod is rectangular, hexagonal or circular.

[0062] The integrating rod can be a fused silica rod, an optical glass rod, or a transparent ceramic rod.

[0063] The liquid crystal assembly 5 includes: a front polarizer, a liquid crystal layer, a rear polarizer, a control circuit board, and a thermally conductive substrate;

[0064] The front polarizer is a high-transmittance resin lens with a nano-scale polarizing coating on its surface.

[0065] A liquid crystal layer is disposed behind the front polarizer; the liquid crystal layer contains multiple liquid crystal cells arranged in an array, and each liquid crystal cell independently controls the light flux.

[0066] The rear polarizer is arranged in a polarization direction orthogonal to the front polarizer;

[0067] A thermally conductive substrate is attached to the back side of the rear polarizer and has a built-in micro heat pipe heat dissipation structure.

[0068] The control circuit board is connected to the radar system 8.

[0069] The control circuit board includes: a drive module, a signal processing module, and a light pattern generation algorithm module;

[0070] The driving module is electrically connected to the liquid crystal cell via a matrix of electrodes;

[0071] The signal processing module is connected to the optical pattern generation algorithm module and the radar system 8 respectively to analyze the vehicle image parameters input by the radar system and to calculate the required optical distribution pattern in real time through the optical pattern generation algorithm module.

[0072] Example 1:

[0073] like Figure 1 The diagram shown is a structural schematic of one embodiment of the present invention. This embodiment includes: an LED light source, a filter 3, an integrating bar assembly 4, a liquid crystal assembly 5, a lens, and a radar system 8; the lens in this embodiment includes: a reflector 6 and a cylindrical lens 7.

[0074] The cylindrical lens 7 and the liquid crystal component 5 are coaxially and symmetrically arranged on both sides of the rear lens group of the integrating rod assembly 4, and the light emitted from the integrating rod assembly 4 is perpendicular to the axis of the cylindrical lens 7 or the liquid crystal component 5.

[0075] White LED1 is placed horizontally, and infrared LED2 is placed perpendicular to white LED1. A bi-color filter is placed at the intersection of their light rays, at a 45° angle to the light rays. An integrating bar assembly 4 is placed in front of the light path, and a reflector 6 is placed behind the integrating bar. The reflector 6 is coaxial with the integrating bar assembly 4, and the reflector 6 is placed at an angle of 45° to 60°. By adjusting the angle of the reflector 6, the light emitted from the integrating bar assembly 4 is refracted by the reflector and enters the liquid crystal assembly 5. The liquid crystal assembly 5 transmits the liquid crystal image through a cylindrical lens 7 to the front of the vehicle.

[0076] The working principle of this embodiment is as follows:

[0077] like Figure 1 As shown, the white LED 1 is placed horizontally, with its own lens positioned in front of it. The light emitted by the LED is converged into near-parallel light after passing through the lens. When the light shines on the bi-color filter, because the bi-color filter transmits visible light but reflects infrared light, the light emitted by the white LED 1 is directly transmitted through the filter and shines on the integrating rod assembly 4. The integrating rod assembly 4 has a light-averaging function; the white light passes through the integrating rod, is reflected by a reflector, and then shines onto the liquid crystal assembly 5. Based on the logic programming of the signals received by the radar system 8, the liquid crystal screen, through the control circuit board, forms images of the low beam and high beam of the headlights, as well as the light patterns required by the vehicle's adaptive headlight system. The white light shining onto the liquid crystal is then passed through the lens to project the required light pattern into the distance, achieving the light distribution requirements of the vehicle lights. It can also achieve a light-diffusing function when meeting oncoming traffic. When an infrared light source is needed, the infrared LED2 is lit. The infrared LED2 is placed perpendicular to the white LED1. The infrared light passes through the lens that works with it and outputs near-parallel light. It is reflected by the filter lens 3, passes through the integrating rod assembly 4, and is reflected by the reflector 6. It then shines onto the liquid crystal assembly 5, and the liquid crystal screen displays the full screen. The light is then transmitted to a distance through the cylindrical lens 7, thus realizing the function of an infrared light source.

[0078] Example 2:

[0079] like Figure 2 The diagram shown is a structural schematic of another embodiment of the present invention. This embodiment includes: an LED light source, a filter 3, an integrating bar assembly 4, a liquid crystal assembly 5, a lens, and a radar system 8.

[0080] In this embodiment, the lens is a cylindrical lens 7; the integrating bar assembly 4, the liquid crystal assembly 5, and the cylindrical lens 7 are arranged coaxially in sequence.

[0081] White LED 1 is placed horizontally, and infrared LED 2 is placed perpendicular to white LED 1. A bichromatic filter is placed at the intersection of their light rays, at a 45° angle to the light rays. An integrating rod assembly 4 is placed in front of the light path, and the light emitted from the integrating rod assembly 4 is incident on the liquid crystal assembly 5 according to the usage conditions. A cylindrical lens 7 is placed directly opposite the liquid crystal assembly.

[0082] The working principle of Example 2 is as follows:

[0083] The light emitted by the white LED1 passes through the bi-color filter, through the integrating bar assembly 4, and shines onto the liquid crystal assembly 5. The liquid crystal assembly 5 displays a specific image of the feedback logic of the radar system 8. The cylindrical lens 7 transmits the liquid crystal image to the front of the vehicle, forming the required high and low beam, oncoming traffic, and AFS functions.

[0084] When an infrared light source is needed, the infrared LED2 is lit, and the infrared light is reflected by the dual-color filter and enters the integrating bar assembly 4. After passing through the integrating bar, it is projected onto the liquid crystal assembly 5, and the entire liquid crystal screen is lit. The light is then projected into the distance through the lens 7 to provide an infrared light source.

[0085] As can be seen from the above embodiments, this utility model provides a highly integrated and intelligent automotive headlight solution. Through innovative optical path design and liquid crystal control technology, it successfully solves the problems of volume redundancy, response lag, and high cost caused by the multi-module separation of traditional automotive lights. The core design includes a coaxial multiplexed optical path for white light and infrared LEDs, a dual-color filter beam splitting mechanism, an integrating bar light equalization system, and a radar-linked liquid crystal dynamic light control module, realizing the integrated function of high beam, low beam, oncoming traffic shielding, AFS, and infrared light source.

[0086] This invention relies on real-time feedback from a radar system, and the liquid crystal algorithm can accurately generate light patterns adapted to road conditions (such as automatic avoidance of oncoming vehicles and enhanced lighting in pedestrian areas), significantly improving nighttime driving safety and ADAS coordination capabilities. Furthermore, through optical path multiplexing and module integration, it greatly reduces the space occupied by traditional vehicle lights, meeting the stringent requirements of new energy vehicles for lightweighting and low energy consumption. In addition, through the infrared light source multiplexing design, it not only supports night vision supplementary lighting, but also provides auxiliary lighting for vehicle sensors (such as lidar and infrared cameras), enhancing the ability to perceive complex environments.

[0087] Those skilled in the art will understand that the above description is merely a preferred embodiment of the present invention, and the various embodiments and / or features described in the claims can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this disclosure. This is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0088] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if these modifications and modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and modifications.

Claims

1. A car headlight with infrared function using a liquid crystal display, characterized in that, include: LED light source, filter (3), integrating bar assembly (4), liquid crystal assembly (5), lens and radar system (8); The LED light source includes: a white LED (1) and an infrared LED (2); The white LED (1) is placed horizontally, and the infrared LED (2) is set perpendicular to the white LED (2). A filter (3) is placed at the intersection of the two lights. The integrating rod assembly (4) is coaxially arranged with the white LED (1), and the integrating rod assembly (4) receives light from the white LED (1) or the infrared LED (2); The liquid crystal component (5) and the lens are both located behind the integrating bar component (4). The light from the white LED (1) of the integrating bar component (4) is incident on the liquid crystal component (5). The liquid crystal component (5) is connected to the radar system (8) to display a specific shape according to the signal sent by the radar system (8). The lens transmits the liquid crystal image to the front of the vehicle to realize the functions of high beam, low beam, oncoming traffic and AFS. The infrared light from the infrared LED (2) is reflected by the filter (3), passes through the integrating bar assembly (4), and is reflected onto the liquid crystal assembly (5), illuminating the entire liquid crystal screen and projecting it into the distance through the lens to provide an infrared light source.

2. A car headlight with infrared function using a liquid crystal display according to claim 1, characterized in that, The filter (3) is a dichroic filter, and the filter (3) reflects infrared light and transmits visible light; The filter (3) is set at a 45° angle to the light from the white LED (1) and the infrared LED (2); The light from the white LED (1) passes horizontally through the filter (3) and is incident on the integrating rod assembly (4), while the light from the infrared LED (2) is refracted through the filter (3) and is incident on the integrating rod assembly (4).

3. A car headlight with infrared function using a liquid crystal display according to claim 1, characterized in that, The integrating bar assembly (4) includes: a front lens group, an integrating bar, and a rear lens group arranged sequentially along the optical axis; The front lens group collimates and couples the incident light to the incident end face of the integrating bar; The front lens group includes: at least one plano-convex lens or aspherical lens with its convex surface facing the incident direction, the focal length of which is adapted to the length of the integrating rod to achieve parallelization of the incident beam. The integrating rod is a regular column made of light-transmitting material, and its sidewall is provided with a total reflection layer; the light emitted from the integrating rod is focused by the rear lens group and then incident on the lens or liquid crystal assembly (5); Adjustable mechanical supports are provided between the front lens group and the incident end face of the integrating rod, and between the exit end face of the integrating rod and the rear lens group; the mechanical supports are a locking ring and fine-tuning threaded structure. The rear lens group is a biconvex lens or an achromatic lens group, and its radius of curvature corresponds to the size of the target focused spot.

4. A car headlight with infrared function using a liquid crystal display according to claim 3, characterized in that, The integrating rod has antireflection coatings on both ends and its operating wavelength covers the visible to near-infrared range; the cross-section of the integrating rod is rectangular, hexagonal or circular.

5. A car headlight with infrared function using a liquid crystal display according to claim 3, characterized in that, The integrating rod is a fused silica rod structure, an optical glass rod structure, or a transparent ceramic rod structure.

6. A car headlight with infrared function using a liquid crystal display according to claim 1, characterized in that, The lens includes: a reflector (6) and a cylindrical lens (7); The cylindrical lens (7) and the liquid crystal assembly (5) are coaxially and symmetrically arranged on both sides of the rear lens group of the integrating rod assembly (4), and the light emitted from the integrating rod assembly (4) is perpendicular to the axis of the cylindrical lens (7) or the liquid crystal assembly (5). The reflector (6) is coaxially arranged with the integrating bar assembly (4), and the reflector (6) is placed at an angle of 45° to 60°. The light emitted from the integrating bar assembly (4) is refracted by the reflector and enters the liquid crystal assembly (5). The liquid crystal assembly (5) transmits the liquid crystal image to the front of the vehicle through the cylindrical lens (7).

7. A car headlight with infrared function using a liquid crystal display according to claim 1, characterized in that, The lens is a cylindrical lens (7); the integrating bar assembly (4), the liquid crystal assembly (5) and the cylindrical lens (7) are arranged coaxially in sequence.

8. A car headlight with infrared function using a liquid crystal display according to claim 1, characterized in that, The liquid crystal assembly (5) includes: a front polarizer, a liquid crystal layer, a rear polarizer, a control circuit board, and a thermally conductive substrate. The front polarizer is a high-transmittance resin lens with a nano-scale polarizing coating on its surface. The liquid crystal layer is disposed behind the front polarizer; the liquid crystal layer contains multiple liquid crystal cells arranged in an array, and each liquid crystal cell independently controls the light flux. The rear polarizer is arranged in a polarization direction orthogonal to the front polarizer; The thermally conductive substrate is attached to the back side of the rear polarizer and has a built-in micro heat pipe heat dissipation structure. The control circuit board is connected to the radar system (8).

9. A car headlight with infrared function using a liquid crystal display according to claim 8, characterized in that, The control circuit board includes: a driving module, a signal processing module, and a light pattern generation algorithm module; The driving module is electrically connected to the liquid crystal unit via a matrix of electrodes; The signal processing module is connected to the optical pattern generation algorithm module and the radar system (8) respectively, so as to analyze the vehicle image parameters input by the radar system (8) and calculate the required optical distribution pattern in real time through the optical pattern generation algorithm module.

Images