A laser engine-based intelligent automotive lighting system and its control method

Abstract

This application relates to the field of automotive lighting technology, and more particularly to an intelligent automotive lighting system and its control method based on a laser engine. The system includes: a laser engine, an optical fiber bundle, a laser headlight optical module, an intelligent lighting feedback and adjustment module, and an integrated control module. The laser engine is connected to the laser headlight optical module via the optical fiber bundle to transmit the laser beam emitted by the laser engine to the laser headlight optical module. The intelligent lighting feedback and adjustment module is connected to the integrated control module to transmit decision commands generated by the intelligent lighting feedback and adjustment module based on perceived driving data to the integrated control module. The integrated control module is connected to both the laser engine and the laser headlight optical module to control them according to the decision commands. This application can improve the freedom of vehicle styling design, reduce the energy consumption of the lighting system, and also enable adaptive switching of lighting modes.

Description

Technical Field

[0001] This application relates to the field of automotive lighting technology, and in particular to an intelligent automotive lighting system based on a laser engine and its control method. Background Technology

[0002] As the automotive industry moves towards intelligence, energy efficiency, and personalization, the performance of automotive lighting systems has become a crucial indicator of a car's competitiveness. Currently, halogen lamps and LED lamps are widely used in automotive lighting systems. While halogen lamps are inexpensive and have strong penetration in rain and fog, they rely on tungsten filaments for heating and light emission, resulting in high energy consumption. Their typical lifespan is only 500-700 hours, requiring frequent replacements, which increases user costs and affects driving safety. Furthermore, halogen lamps have poor brightness and color stability, making them unsuitable for the lighting needs of mid-to-high-end intelligent vehicles.

[0003] Although LED lights have lower energy consumption and faster response, they have gradually replaced halogen lamps and become the mainstream choice for automotive lighting systems. However, LED lights generate a lot of heat when they are working. If heat dissipation is not timely, it will lead to luminous efficacy decay and damage to the LED lights, affecting their lifespan and stability. Furthermore, the heat dissipation structure of LED lights is limited by the space in the vehicle headlights and the heat source of the engine, making it impossible to fundamentally solve the heat dissipation problem of LED lights.

[0004] Furthermore, both halogen lamps and LED lamps rely on reflectors for light distribution, making it difficult to reduce the size of the lamps. This limits the design freedom of the lamp shape and the overall vehicle appearance, making it impossible to meet the personalized and fashionable design needs of automobiles. At the same time, halogen lamps have high energy consumption and LED lamps have energy efficiency losses, neither of which are in line with the trend of energy-saving development in automobiles and are difficult to adapt to the high requirements of intelligent vehicles for lighting systems.

[0005] Therefore, developing a higher-performance automotive lighting system has become an urgent technical problem to be solved in the field of intelligent automotive lighting systems. Summary of the Invention

[0006] This application provides a laser engine-based intelligent automotive lighting system and its control method to improve the freedom of vehicle styling design, reduce the energy consumption of the lighting system, and enable adaptive switching of lighting modes.

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution: A laser engine-based intelligent automotive lighting system includes: a laser engine, an optical fiber bundle, a laser headlight optical module, an intelligent lighting feedback and adjustment module, and an integrated control module. The laser engine is connected to the laser headlight optical module via the optical fiber bundle to transmit the laser beam emitted by the laser engine to the laser headlight optical module. The intelligent lighting feedback and adjustment module is connected to the integrated control module to transmit decision commands generated by the intelligent lighting feedback and adjustment module based on perceived driving data to the integrated control module. The integrated control module is connected to both the laser engine and the laser headlight optical module to control the laser engine and the laser headlight optical module according to the decision commands.

[0008] In the laser engine-based intelligent automotive lighting system described above, preferably, the laser headlight optical module includes: a rear optical component and a component drive control module, wherein the component drive control module is used to drive the position of the rear optical component.

[0009] As described above, in the laser engine-based intelligent automotive lighting system, preferably, the rear optical components include: a collimating microlens, a fluorescent ceramic sheet, a compound eye homogenizing lens array, a cutoff light shield, a freeform main lens, and an automotive exterior protective glass; the light beam emitted from the fiber bundle passes sequentially through the collimating microlens, the fluorescent ceramic sheet, the compound eye homogenizing lens array, the freeform main lens, and the automotive exterior protective glass before being emitted outward; and the cutoff light shield physically cuts the homogenized light spot of the compound eye homogenizing lens array to create a compliant cutoff line, thereby obtaining the desired light pattern of the vehicle headlight.

[0010] In the laser engine-based intelligent automotive lighting system described above, preferably, the integrated control module is connected to the LD array of the laser engine to control the drive current of the LD array; the integrated control module is also connected to the component drive control module of the laser vehicle light optical module to change the position of the rear optical component 1 by controlling the control component drive control module.

[0011] In the laser engine-based intelligent automotive lighting system described above, preferably, the intelligent lighting feedback and adjustment module includes: an environmental perception unit and a signal processing execution unit; the environmental perception unit senses multi-source driving data and transmits the multi-source driving data to the signal processing execution unit; the signal processing execution unit processes the multi-source driving data to generate various decision commands and sends the decision commands to the integrated control module.

[0012] A control method for an intelligent automotive lighting system based on a laser engine, executed by an intelligent lighting feedback and adjustment module, includes the following steps: Step T410: Real-time acquisition of raw driving data and normalization processing of the raw driving data; Step T420: Determination of engine control parameters for controlling the laser engine and optical control parameters for controlling the laser vehicle headlight optical module based on the normalized driving data; Step T430: Encapsulation of the engine control parameters and optical control parameters into decision commands for driving the laser engine and the laser vehicle headlight optical module, respectively; Step T440: Real-time acquisition of lighting control target feedback parameters, and correction of the engine control parameters and optical control parameters using the lighting control target feedback parameters to perform closed-loop control.

[0013] The control method for the laser engine-based intelligent vehicle lighting system described above preferably involves determining the engine control parameters for the laser engine based on normalized driving data, including the following sub-steps: Step T421: Determine the main laser output power based on normalized road illuminance, rainfall intensity, vehicle speed, and oncoming vehicle distance; determine the supplementary laser output power based on the main laser output power and steering wheel angle; Step T422: Determine the target correlated color temperature based on normalized rainfall intensity; calculate the weighting of each laser color based on the target correlated color temperature; Step T423: Under this weighting, match the total mixed power of each laser color to the sum of the main laser output power and the supplementary laser output power; and obtain the output power of each laser color from the total mixed power of each laser color and the weighting of each laser color; Step T424: Calculate the driving current of each laser color based on the output power of each laser color; and use the driving current of each laser color as the engine control parameter.

[0014] In the control method of the laser engine-based intelligent automotive lighting system described above, preferably, the main laser output power is... The calculation formula is as follows: ; in, This refers to the low beam output power; Reference power; For vehicle speed coefficient, ; Illuminance coefficient, , For the target road surface illuminance, The collected road surface illuminance; The rain / fog penetration coefficient is determined based on rainfall intensity. Dynamic value retrieval; This refers to the output power of the high beam. The glare suppression coefficient is determined based on the distance to oncoming vehicles. Dynamic value retrieval; Main laser output power; This represents the maximum total laser output power.

[0015] In the control method of the laser engine-based intelligent automotive lighting system described above, preferably, the supplementary laser output power is... The calculation formula is as follows: ; in, To compensate for laser output power; For the directional fill light coefficient, , when At that time, supplementary laser output power The calculation takes effect.

[0016] The control method for the laser engine-based intelligent automotive lighting system described above preferably involves determining the optical control parameters for the laser headlight optical module based on normalized driving data, including the following sub-steps: Step T425: Determine the horizontal deflection angle of the headlight based on the normalized steering wheel angle; Step T426: Determine the driving displacement parameters for the laser headlight optical module based on the horizontal deflection angle of the headlight; Step T427: Determine the high / low beam coupling optical path switching parameters based on the normalized vehicle speed and the distance to oncoming vehicles; Step T428: Use the driving displacement of the freeform surface main lens and the high / low beam coupling optical path switching parameters as the optical control parameters.

[0017] Compared to the prior art, the laser engine-based intelligent automotive lighting system and its control method of this application adopt a separate layout for the laser engine and the headlight, fundamentally solving the problem of limited heat dissipation in traditional headlights. Combined with independent heat dissipation components, the lifespan can be increased by 3-5 times. Furthermore, by using reflectorless micro-optical elements for light distribution, the headlight volume can be reduced by more than 60%, significantly increasing the freedom of overall vehicle styling design. In addition, it uses four-color lasers to synthesize white light, with a color temperature continuously adjustable between 3000-6500K, resulting in excellent light quality, strong rain and fog penetration, and higher lighting comfort and safety. It also achieves approximately 80% energy savings compared to halogen lamps and approximately 30%-40% energy savings compared to LED lamps, demonstrating outstanding energy-saving performance. Moreover, it incorporates intelligent closed-loop control, which can automatically achieve adaptive lighting such as anti-glare for oncoming traffic, cornering follow-up, and enhanced lighting in rain and fog. Simultaneously, the fiber optic bundle serves both light transmission and data transmission functions, simplifying the wiring harness, reducing weight and electromagnetic interference, and making the system more stable and reliable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the intelligent automotive lighting system based on a laser engine provided in this application; Figure 2 This is a schematic diagram of the laser engine provided in this application; Figure 3 This is a schematic diagram of the laser vehicle light optical module provided in this application; Figure 4 This is a flowchart of the control method for the laser engine-based intelligent automotive lighting system provided in this application; Figure 5 This is a flowchart provided in this application for determining engine control parameters based on driving data; Figure 6 This is a flowchart provided in this application for determining optical control parameters based on driving data. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] Example 1 like Figure 1 As shown, this application provides an intelligent automotive lighting system based on a laser engine, including: a laser engine 110, an optical fiber bundle 120, a laser vehicle light optical module 130, an intelligent lighting feedback and adjustment module 140, and an integrated control module (not shown in the figure).

[0022] The laser engine 110 is connected to the laser vehicle lighting optical module 130 via an optical fiber bundle 120 to transmit the beam emitted by the laser engine 110 to the laser vehicle lighting optical module 130. The intelligent lighting feedback and adjustment module 140 is connected to the integrated control module to transmit decision commands generated by the intelligent lighting feedback and adjustment module 140 based on the driving data it senses to the integrated control module. For example, based on the driving data that there is a vehicle ahead, a decision command to turn off the high beams is generated; based on the driving data that the vehicle speed exceeds 80 km / h, a decision command to turn on the high beams is generated; based on the driving data that there is a curve ahead, a decision command to turn on the curve auxiliary lights is generated. The integrated control module is connected to the laser engine 110 and the laser vehicle headlight optical module 130 respectively, so as to control the laser engine 110 and the laser vehicle headlight optical module 130 according to the decision command, so that the beam emitted by the laser engine 110 is finally emitted by the laser vehicle headlight optical module 130 to produce vehicle headlights that meet the regulatory requirements for light pattern, angle and illuminance and can be used directly on the road.

[0023] Since the laser engine 110 and the laser headlight optical module 130 are connected by an optical fiber bundle 120, the laser engine 110 and the laser headlight optical module 130 are designed separately. This allows the laser engine 110 to be flexibly installed in any suitable location away from the engine heat source (e.g., the trunk, the side of the chassis). This structurally solves the heat dissipation problem caused by space and heat source limitations in existing headlights, thereby increasing the lifespan and reliability of the automotive lighting system. Furthermore, since the laser headlight optical module 130 does not require an integrated light source, the size of the headlight can be significantly reduced. The optical fiber bundle 120 can also replace the existing vehicle data cable to transmit various information during vehicle operation (e.g., data between the integrated control module and the laser engine 110 or the laser headlight optical module 130). This not only provides a massive information transmission channel for the vehicle but also reduces the arrangement of high-voltage wiring harnesses, thereby reducing the amount of non-ferrous metals used, reducing the weight of the vehicle, and saving up to 80% of electricity compared to halogen lamps.

[0024] Optionally, the laser engine 110 includes an LD array 111 and a laser coupling component 112; the beam emitted by the LD array 111, after being coupled and shaped by the laser coupling component 112, can accurately, efficiently, and stably enter the fiber bundle 120, thereby avoiding optical loss. Alternatively, such as... Figure 2As shown, the laser coupling assembly 112 includes: a fast-axis collimating microlens 1121, a slow-axis collimating microlens array 1122, a beam shaper 1123, and a focusing lens 1124. The beam emitted by the LD array 111 passes sequentially through the fast-axis collimating microlens 1121, the slow-axis collimating microlens array 1122, the beam shaper 1123, and the focusing lens 1124 before entering the fiber bundle 120.

[0025] In addition, the laser engine 110 integrates an independent heat dissipation component (not shown in the figure), and the laser engine 110 can be flexibly installed in any suitable position on the vehicle. The laser headlight optical module 130, on the other hand, does not require a matching heat dissipation component, thus further reducing the size of the headlight and leaving more space for the vehicle's front-end design. The heat dissipation component can employ a combination of heat pipes and cooling fins, along with an air-cooled fan. Copper heat pipes can be used, and aluminum alloy cooling fins can be used. Through a combination of natural heat dissipation and forced air cooling, the operating temperature of the laser engine 110 can be controlled within the 25-60℃ operating range.

[0026] Optional, such as Figure 3 As shown, the laser vehicle headlight optical module 130 includes: a rear optical component 131 and an element drive control module (not shown in the figure); the element drive control module is used to drive the position of the rear optical component 131 so that the beam emitted from the fiber bundle 120 is emitted outward after passing through the rear optical component 131 to produce vehicle headlights that meet the regulatory requirements for light pattern, angle and illuminance and can be directly used on the road. The rear optical assembly 131 includes: a collimating microlens 1311, a fluorescent ceramic sheet 1312, a compound eye homogenizing lens array 1313, a cutoff light shield 1314, a freeform main lens 1315, and an automotive exterior protective glass 1316. The light beam emitted from the fiber bundle 120 passes sequentially through the collimating microlens 1311, the fluorescent ceramic sheet 1312, the compound eye homogenizing lens array 1313, the freeform main lens 1315, and the automotive exterior protective glass 1316, and then emits a vehicle headlight that meets the regulatory requirements for light pattern, angle, and illuminance and can be directly used on the road. Furthermore, the cutoff light shield 1314 physically cuts the homogenized light spot of the compound eye homogenizing lens array 1313 to cut out a compliant cutoff line, thereby obtaining the desired light pattern of the vehicle headlight (e.g., low beam, urban lighting, adaptive anti-glare low beam).

[0027] Among them, the collimating microlens 1311 collimates and contracts the diverging light emitted from the fiber bundle 120 into a parallel beam; the fluorescent ceramic sheet 1312 mixes and converts the collimated and contracted parallel beam from the collimating microlens 1311 into a white light spot with high color rendering and standard color temperature; the compound eye uniform light lens array 1313 divides, superimposes, and homogenizes the white light spot converted by the fluorescent ceramic sheet 1312 to make the brightness of the emitted light spot uniform and consistent, meeting the regulatory requirements for the uniformity of road lighting of vehicle headlights; the freeform surface main lens 1315 performs angle convergence, optical path deflection, and light pattern shaping on the light spot after homogenization by the compound eye uniform light lens array 1313 to accurately match the high and low beam illumination distance, illumination width, and road illuminance distribution, shaping the regular light spot into the light pattern specified by regulations; the vehicle exterior protective glass 1316 provides protection against dust, water, fog, sand and gravel impacts, and ultraviolet aging.

[0028] Precise light distribution can be achieved through the collimating microlens 1311, fluorescent ceramic sheet 1312, compound eye uniform light lens array 1313, cutoff light shield 1314, and freeform surface main lens 1315. Since these optical elements can all be miniaturized and their size can be in the millimeter range, the axial stacking thickness of the entire rear optical assembly 131 can be controlled to be very thin. As a result, the headlight formed does not need a traditional reflector, which can effectively reduce the size of the headlight and leave more space for front-end styling design. This allows for more flexible and personalized headlight design and provides ample space for the overall vehicle design, enhancing the vehicle's style and aesthetics. It also allows for the addition of components such as batteries, providing conditions for improving the vehicle's functionality.

[0029] Based on the above, the LD array 111 can be composed of semiconductor lasers with four wavelengths: red, yellow, blue, and green. The wavelength of the red semiconductor laser can be selected from 620-650nm, the wavelength of the yellow semiconductor laser can be selected from 570-590nm, the wavelength of the blue semiconductor laser can be selected from 450-470nm, and the wavelength of the green semiconductor laser can be selected from 520-540nm. The integrated control module adjusts the driving current of each semiconductor laser according to the decision command, so that the four-color lasers are mixed in the corresponding ratio and transmitted to the laser vehicle headlight optical module 130 through the fiber bundle 120. After passing through the laser vehicle headlight optical module 130, the final output is a vehicle headlight that meets the regulatory requirements for light pattern, angle, and illuminance and can be directly used on the road. Moreover, the color temperature of the light can be adjusted within the range of 3000K-6500K to adapt to different basic lighting needs, and can ensure good light quality and strong penetration in rain and fog.

[0030] Optionally, the integrated control module is connected to the LD array 111 of the laser engine 110 to control the drive current of the LD array 111, thereby changing the final illumination brightness of the vehicle headlight by adjusting the laser output power of the LD array 111. Alternatively, the integrated control module is connected to the component drive control module (e.g., a micromotor) of the laser headlight optical module 130 to change the position of the rear optical component 131 by controlling the control module, thereby adjusting the illumination angle (e.g., adaptive steering, horizontal / vertical adjustment), and thus switching between different operating modes (on / off or combination of low beam / high beam).

[0031] Optionally, the intelligent lighting feedback and adjustment module 140 includes an environmental sensing unit 141 and a signal processing execution unit 142. The environmental sensing unit 141 senses multi-source driving data and transmits the multi-source driving data to the signal processing execution unit 142. The signal processing execution unit 142 processes the multi-source driving data to generate various decision commands and sends the decision commands to the integrated control module, so that the integrated control module controls the LD array 111 of the laser engine 110 and the component drive control module of the laser vehicle lighting optical module 130 according to the decision commands. For example, by adjusting the magnitude of the drive current of the LD array 111 and the unit switching of the LD array 111, precise adjustment of the lighting luminous flux and color temperature can be achieved. As an example, under normal environmental conditions, the color temperature is adjusted to a soft pure white, increasing comfort and color rendering; when driving in rainy or foggy weather, the color temperature is adjusted to a yellowish tone, increasing penetration; and it can even display colorful lights as needed, providing the driver with a perfect driving visual effect; at the same time, the light spatial distribution can be dynamically adjusted according to vehicle speed and steering wheel angle to identify drivers of oncoming vehicles, avoid traffic accidents caused by glare, and further improve driving safety.

[0032] The environmental perception unit 141 comprises various miniature sensors, such as photoelectric sensors, rain sensors, vehicle speed sensors, steering wheel angle sensors, and thermal infrared sensors. For example, the photoelectric sensor detects road surface illuminance in real time and feeds it back to the signal processing and execution unit 142 to determine road conditions; the rain sensor, installed on the vehicle's windshield, detects rainfall intensity in real time and feeds it back to the signal processing and execution unit 142 to determine rain or fog weather; the vehicle speed sensor and steering wheel angle sensor collect vehicle speed and steering wheel angle data in real time and feed them back to the signal processing and execution unit 142 to provide data support for dynamic light distribution; the thermal infrared sensor senses the distance to oncoming vehicles in real time and feeds it back to the signal processing and execution unit 142 to provide data support for driving safety.

[0033] Example 2 like Figure 4As shown, this application provides a control method for an intelligent automotive lighting system based on a laser engine, executed by an intelligent lighting feedback and adjustment module 140, including the following steps: Step T410: Collect raw driving data in real time and normalize the raw driving data; The environmental sensing unit 141 collects raw driving data in real time at a predetermined frequency, such as: the photoelectric sensor collects road surface illuminance. (lx), Rainfall intensity collected by a rain sensor (mm / h), vehicle speed sensor collects vehicle speed (km / h), the steering wheel angle sensor collects the steering wheel angle. (°), Thermal infrared sensor collects distance to oncoming vehicle (m), and the environmental perception unit 141 sends the collected raw travel data to the signal processing execution unit 142. The signal processing execution unit 142 normalizes the raw travel data to eliminate the dimensional differences in the raw travel data.

[0034] Furthermore, the normalization formula is as follows: ; in, The driving data is normalized; This is the original driving data; This is the minimum range value in the original driving data; This is the maximum range value in the original driving data.

[0035] Step T420: Determine the engine control parameters for controlling the laser engine and the optical control parameters for controlling the laser vehicle headlight optical module based on the normalized driving data. like Figure 5 As shown, the engine control parameters for controlling the laser engine are determined based on the normalized driving data, including the following sub-steps: Step T421: Determine the main laser output power based on the normalized road surface illuminance, rainfall intensity, vehicle speed, and distance to oncoming vehicles; determine the supplementary laser output power based on the main laser output power and steering wheel angle. Signal processing execution unit 142 calculates the normalized road surface illuminance. Rainfall intensity Speed Distance to oncoming vehicles Determine the main laser output power of laser engine 110 The signal processing execution unit 142 determines the main laser output power based on the signal processing execution unit 142. and steering wheel angle Determine the supplementary laser output power of laser engine 110 .

[0036] Since the LD array 111 of the laser engine 110 is composed of semiconductor lasers with four wavelengths: red, yellow, blue, and green, the main laser output power is... The total main laser output power and supplementary laser output power of semiconductor lasers with four wavelengths: red, yellow, blue, and green. This refers to the total supplementary laser output power of semiconductor lasers with four wavelengths: red, yellow, blue, and green.

[0037] Furthermore, the main laser output power The calculation formula is as follows: ; in, This refers to the low beam output power; The reference power is 30% of the rated power. For vehicle speed coefficient, ; Illuminance coefficient, , For the target road surface illuminance, The collected road surface illuminance; The rain / fog penetration coefficient is determined based on rainfall intensity. The value is dynamically adjusted, and the low beam output power is gradually increased as the rainfall increases to compensate for the illuminance attenuation caused by rain and fog scattering and ensure the illumination penetration. This refers to the output power of the high beam. The glare suppression coefficient is determined based on the distance to oncoming vehicles. Dynamically determined, depending on the distance of oncoming vehicles. As the laser output power increases, the laser output power is gradually improved. Main laser output power; This represents the maximum total laser output power, which is the maximum power that the intelligent automotive lighting system can output, ensuring that the light source operates within a safe range when multiple operating conditions are superimposed.

[0038] when At that time, oncoming vehicles were relatively close. Turn off all high beam output power and maintain full low beam output power; when At that time, the oncoming vehicle was quite far away. Turn on some of the high beam output power; when At that time, there were no oncoming vehicles. Turn on all high beam output power.

[0039] when At that time, there was no rain or light rain. ;when At that time, there was a light drizzle and fog. Laser output power increased by 10%; when At that time, there was heavy rain and fog. Laser output power increased by 20%.

[0040] Furthermore, supplement the laser output power The calculation formula is as follows: ; in, To compensate for the laser output power, that is: to compensate for the laser output power when supplementing light on the inside of the curve; The steering beam compensation coefficient is determined based on the steering wheel angle. The size of the laser beam determines the output power of the supplementary laser. , when At that time, supplementary laser output power The calculation takes effect without interfering with the main laser output power.

[0041] Step T422: Determine the target correlated color temperature based on the normalized rainfall intensity, and calculate the weighting of each color laser based on the target correlated color temperature;

[0042] Signal processing execution unit 142 based on rainfall intensity Determine the target correlated color temperature Then, based on the target related color temperature The system automatically calculates the weighting ratio of red, yellow, blue, and green lasers within the specified color temperature range. .

[0043] Furthermore, target correlated color temperature The adaptive adjustment formula is as follows: ; in, For the target correlated color temperature, The lower the color temperature, the more yellow and warm it appears. The higher the value, the whiter and cooler the color temperature; Kelvin is a unit of color temperature.

[0044] As an example, target-related color temperature The color temperature range is as follows: 1. When hour , , , ; 2. When hour , , , ; 3. When hour , , , , Step T423: Under this ratio and weight, the total power of the mixed laser of each color is adapted to the sum of the output power of the main laser and the output power of the supplementary laser, and the output power of each laser is obtained from the total power of the mixed laser of each color and the ratio and weight of each laser.

[0045] The signal processing execution unit 142 must ensure that the red, yellow, blue, and green lasers are weighted proportionally. Total power of four-color laser mixing With the main laser output power Complementary laser output power The sum is equal, and the total power is obtained by mixing the various colors of lasers. Weighting ratio of each color laser The output power of each color laser was calculated. .

[0046] Furthermore, the total power of the four-color laser mixture and the output power of various laser colors The expression is as follows: ; in, This represents the total power of the four-color laser mixture. The weighting ratios of red, yellow, blue, and green lasers are respectively, and ; This refers to the output power of the red laser. The output power of the yellow laser. This refers to the output power of the blue laser. This is the output power of a green laser.

[0047] Step T424: Calculate the driving current of each color laser based on the output power of each color laser, and use the driving current of each color laser as the engine control parameter. The signal processing execution unit 142 determines the output power of each color laser based on... (Red laser output power) Yellow laser output power Blue laser output power Green laser output power The laser driving currents of each color emitted by the semiconductor laser were calculated. (Red laser driving current) Yellow laser driving current Red laser driving current Red laser driving current Then, drive the different colored laser currents. As engine control parameters.

[0048] Furthermore, the driving current for each color of a semiconductor laser that emits different colors of laser light... The calculation formula is as follows: ; in, For driving current of various colors of laser; This refers to the driving voltage of the semiconductor laser. The electro-optical conversion efficiency is 0.4 to 0.6.

[0049] In addition, such as Figure 6 As shown, the optical control parameters for controlling the laser vehicle headlight optical module are determined based on the normalized driving data, including the following sub-steps: Step T425: Determine the horizontal deflection angle of the headlights based on the normalized steering wheel angle; The signal processing execution unit 142 determines the steering wheel angle based on the steering wheel angle. Determine the horizontal deflection angle of the headlights And the headlights' horizontal deflection angle With the steering wheel angle Dynamic deflection is used to support the subsequent elimination of blind spots in curves where there is no lighting.

[0050] Furthermore, the formula for calculating the horizontal deflection angle of the headlights is as follows: ; in, The horizontal deflection angle of the headlights (°); This is the transmission proportional coefficient, with a value ranging from 0.3 to 0.5.

[0051] Step T426: Determine the driving displacement parameters of the control laser headlight optical module based on the horizontal deflection angle of the headlight; The signal processing execution unit 142 determines the horizontal deflection angle of the headlights based on the headlights. Determine the driving displacement parameters of the freeform primary lens 1315 in the rear optical assembly 131 used to control the laser vehicle light optical module 130. .

[0052] Furthermore, the driving displacement of the freeform surface primary lens The calculation formula is as follows: ; in, The driving displacement (mm) of the primary lens on the freeform surface; This is the angle-to-displacement conversion coefficient.

[0053] Step T427: Determine the high / low beam coupling optical path switching parameters based on the normalized vehicle speed and the distance to the oncoming vehicle; Signal processing execution unit 142 calculates the normalized vehicle speed. Distance to oncoming vehicles The switching parameters of the far / near optical coupling optical path are obtained by performing a switching determination. The cutoff shield 1314 and freeform main lens 1315 in the rear optical component 131 of the laser vehicle light optical module 130 are used to switch the far / near light coupling optical path.

[0054] Furthermore, the switching parameters for far / near optical coupling. The expression is as follows: ; in, These are the parameters for switching between far and near optical coupling paths. For vehicle speed; This refers to the distance to oncoming vehicles.

[0055] Step T428: Use the driving displacement of the freeform surface master lens and the switching parameters of the far / near light coupling optical path as optical control parameters; The signal processing execution unit 142 drives the displacement of the freeform surface primary lens obtained in steps T425 to T427. And far / near optical coupling optical path switching parameters These are the optical control parameters used to control the laser vehicle light optical module 130.

[0056] Step T430: Encapsulate the engine control parameters and optical control parameters into decision instructions for driving the laser engine and the laser vehicle headlight optical module, respectively. The signal processing execution unit 142 drives the current of each color laser. The signal processing execution unit 142 encapsulates the decision instructions for controlling the semiconductor lasers emitting various colors of laser light in the LD array 111 of the laser engine 110, and drives the displacement parameters. and far / near optical coupling optical path switching parameters The decision command is encapsulated in the freeform main lens 1315 and the cutoff light shield 1314 and the freeform main lens 1315 in the rear optical component 131 of the laser vehicle light optical module 130, so as to send the decision command to the integrated control module, thereby controlling the laser engine 110 and the laser vehicle light optical module 130, and thus realizing the switching of different working modes (on, off or combined of low beam / high beam).

[0057] Step T440: Real-time acquisition of lighting control target feedback parameters, and correction of engine control parameters and optical control parameters based on lighting control target feedback parameters to perform closed-loop control; The environmental sensing unit 141 also collects lighting control target feedback parameters in real time at a predetermined frequency, such as: the photoelectric sensor (ordinary) collects road illuminance. (lx) and actual light color temperature (K), photoelectric edge sensor collects actual illumination angle (°), the optical position sensor collects the actual optical pattern boundary. (m), and the environmental perception unit 141 sends the collected lighting control target feedback parameters to the signal processing execution unit 142, which calculates the error between the lighting control target feedback parameters and the corresponding target values. Then through error The target correction amount for lighting control was calculated. .

[0058] Furthermore, the target correction amount for lighting control The calculation formula is as follows: ; in, Correction amount for lighting control target; This is a proportionality coefficient, its function is to amplify the error proportionally in order to quickly respond to deviations and eliminate the current error; The integral coefficient is used to integrate the error over time, eliminate the steady-state error of the system, and ensure that the final output is stable near the target value. These are differential coefficients, whose function is to correct for errors in advance based on the rate of change of the error, suppress rapid changes in the error, and improve system stability. This refers to the error between the feedback parameters of the lighting control target and the corresponding target value.

[0059] In addition, regarding road surface illuminance Actual light color temperature Actual illumination angle and actual light pattern boundary The error was calculated independently for each case. It will be through road surface illuminance and actual light color temperature Corresponding error The obtained lighting control target correction amount Used for driving current of various colors of lasers The correction will be made based on the actual angle of illumination. and actual light pattern boundary Corresponding error The obtained lighting control target correction amount Used for driving displacement parameters Make corrections.

[0060] Correction amount by controlling the target through lighting For driving current of various colors of laser and driving displacement parameters The correction is performed by relating the target correction amount for illumination control to the driving current of each color laser. and driving displacement parameters Multiplying these together yields the corrected laser driving currents for each color. and the corrected driving displacement parameters The corrected driving currents for each color laser and the corrected driving displacement parameters Encapsulating it into decision instructions can improve accuracy.

[0061] The above-mentioned intelligent closed-loop control of the intelligent vehicle lighting system can realize functions such as automatic anti-glare when meeting oncoming traffic, high-speed high beam, curve following, rain and fog enhancement, and tunnel adaptation. It can quickly correct illuminance, color temperature, illumination angle and light pattern boundary, thereby completely eliminating blind spots and glare risks.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser engine-based intelligent automotive lighting system, characterized in that, Includes: laser engine, fiber bundle, laser vehicle light optical module, intelligent lighting feedback and adjustment module, and integrated control module; The laser engine is connected to the laser vehicle headlight optical module via an optical fiber bundle to transmit the beam emitted by the laser engine to the laser vehicle headlight optical module. The intelligent lighting feedback and adjustment module is connected to the integrated control module to transmit the decision commands generated by the intelligent lighting feedback and adjustment module based on the driving data it senses to the integrated control module. The integrated control module is connected to both the laser engine and the laser vehicle headlight optical module to control the laser engine and the laser vehicle headlight optical module according to the decision commands.

2. The intelligent automotive lighting system based on a laser engine according to claim 1, characterized in that, The laser vehicle headlight optical module includes a rear optical component and a component drive control module, which is used to drive the position of the rear optical component.

3. The intelligent automotive lighting system based on a laser engine according to claim 2, characterized in that, The rear optical components include: collimating microlenses, fluorescent ceramic sheets, compound eye homogenizing lens arrays, cutoff light shields, freeform main and secondary lenses, and automotive exterior protective glass; The light beam emitted from the fiber bundle passes sequentially through a collimating microlens, a fluorescent ceramic sheet, a compound eye homogenizing lens array, a freeform main lens, and an automotive outer protective glass before being emitted outward; Furthermore, the light spot after homogenization of the compound eye uniform light lens array is physically cut off by a cut-off light shield to cut out a compliant cut-off line and obtain the desired light pattern of the vehicle headlight.

4. The intelligent automotive lighting system based on a laser engine according to claim 2, characterized in that, The integrated control module is connected to the LD array of the laser engine to control the drive current of the LD array; The integrated control module is connected to the component drive control module of the laser vehicle light optical module to change the position of the rear optical component 1 by controlling the control module through the control components.

5. The intelligent automotive lighting system based on a laser engine according to any one of claims 1 to 4, characterized in that, The intelligent lighting feedback and adjustment module includes an environmental sensing unit and a signal processing execution unit. The environmental sensing unit senses multi-source driving data and transmits the multi-source driving data to the signal processing execution unit. The signal processing execution unit processes the multi-source driving data to generate various decision commands and sends the decision commands to the integrated control module.

6. A control method for an intelligent automotive lighting system based on a laser engine, characterized in that, Performed by the intelligent lighting feedback and adjustment module, the process includes the following steps: Step T410: Collect raw driving data in real time and normalize the raw driving data; Step T420: Determine the engine control parameters for controlling the laser engine and the optical control parameters for controlling the laser vehicle headlight optical module based on the normalized driving data. Step T430: Encapsulate the engine control parameters and optical control parameters into decision instructions for driving the laser engine and the laser vehicle headlight optical module, respectively. Step T440: Real-time acquisition of lighting control target feedback parameters, and correction of engine control parameters and optical control parameters based on lighting control target feedback parameters to perform closed-loop control.

7. The control method for an intelligent automotive lighting system based on a laser engine according to claim 6, characterized in that, The engine control parameters for controlling the laser engine are determined based on the normalized driving data, including the following sub-steps: Step T421: Determine the main laser output power based on the normalized road surface illuminance, rainfall intensity, vehicle speed, and distance to oncoming vehicles; determine the supplementary laser output power based on the main laser output power and steering wheel angle. Step T422: Determine the target correlated color temperature based on the normalized rainfall intensity, and calculate the weighting of each color laser based on the target correlated color temperature; Step T423: Under this ratio and weight, the total power of the mixed laser of each color is adapted to the sum of the output power of the main laser and the output power of the supplementary laser, and the output power of each laser is obtained from the total power of the mixed laser of each color and the ratio and weight of each laser. Step T424: Calculate the driving current of each color laser based on the output power of each color laser, and use the driving current of each color laser as the engine control parameter.

8. The control method for an intelligent automotive lighting system based on a laser engine according to claim 7, characterized in that, Main laser output power The calculation formula is as follows: ； in, This refers to the low beam output power; Reference power; For vehicle speed coefficient, ; Illuminance coefficient, , For the target road surface illuminance, The collected road surface illuminance; The rain / fog penetration coefficient is determined based on rainfall intensity. Dynamic value retrieval; This refers to the output power of the high beam. The glare suppression coefficient is determined based on the distance to oncoming vehicles. Dynamic value retrieval; Main laser output power; This represents the maximum total laser output power.

9. The control method for an intelligent automotive lighting system based on a laser engine according to claim 8, characterized in that, Compensating for laser output power The calculation formula is as follows: ； in, To compensate for laser output power; For the directional fill light coefficient, ,when At that time, supplementary laser output power The calculation takes effect.

10. The control method for an intelligent automotive lighting system based on a laser engine according to claim 6, characterized in that, The optical control parameters for controlling the laser vehicle headlight optical module are determined based on the normalized driving data, including the following sub-steps: Step T425: Determine the horizontal deflection angle of the headlights based on the normalized steering wheel angle; Step T426: Determine the driving displacement parameters of the control laser headlight optical module based on the horizontal deflection angle of the headlight; Step T427: Determine the high / low beam coupling optical path switching parameters based on the normalized vehicle speed and the distance to the oncoming vehicle; Step T428: Use the driving displacement of the freeform surface master lens and the switching parameters of the far / near light coupling optical path as optical control parameters.

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