Cut-off shutter, vehicle light optical system, and vehicle

Abstract

The application provides a cut-off line baffle, a vehicle lamp optical system and a vehicle, and is applied to the field of vehicle lamps. The cut-off line baffle is arranged between a primary optical element and a light emitting element. The shape of the side of the cut-off line baffle close to the light emitting element is bathtub type. The cut-off line baffle controls the illumination range of the light emitted by the light module converged by the primary optical element. The light emitting light shape with the bathtub type cut-off line is formed through the light emitting element. Since the bathtub type is sequentially connected by a cylinder head segment, a front cylinder wall segment, a cylinder bottom segment, a rear cylinder wall segment and a cylinder tail segment, the cylinder head segment, the cylinder bottom segment and the cylinder tail segment are parallel to each other and the perpendicular distance between them is greater than a preset value. The perpendicular distance between the cylinder head segment and the cylinder bottom segment is greater than the perpendicular distance between the cylinder tail segment and the cylinder bottom segment. The cylinder tail segment and the cylinder head segment are higher than the cylinder bottom segment. In this way, the height of the cut-off line cylinder tail segment is increased, the illumination distance on the left side of the vehicle is increased, and the illumination effect on the left side of the vehicle is ensured.

Description

Technical Field

[0001] This application relates to the field of vehicle lighting control technology, specifically to a cut-off line baffle, a vehicle lighting optical system, and a vehicle. Background Technology

[0002] In existing technology, the cutoff lines for high and low beams of vehicles are typically designed as a straight line with the left side lower than the right, such as... Figure 1 As shown, taking the left headlight of a vehicle as an example, the illumination distance on the left side of the vehicle is shorter than that on the right side, resulting in poorer illumination on the left side. Summary of the Invention

[0003] Based on the defects and shortcomings of the prior art, this application proposes a cut-off line baffle, a vehicle lamp optical system, and a vehicle. By designing the shape of the side of the cut-off line baffle near the light-emitting element to be bathtub-shaped, a light-emitting light pattern with a bathtub-shaped cut-off line is formed through the light-emitting element, thus solving the problem of poor lighting effect on the left side of the vehicle.

[0004] According to a first aspect of the embodiments of this application, a cutoff line baffle is provided, the cutoff line baffle being disposed between a primary optical element and a light-emitting element; The primary optical element is used to converge the light emitted by the vehicle's headlight module; The cutoff line baffle is shaped like a bathtub on the side near the light-emitting element. The cutoff line baffle is used to control the illumination range of the light converged by the primary optical element, and the light-emitting element forms a light-emitting pattern with a bathtub-shaped cutoff line. The bathtub is composed of a tub head section, a front tub wall section, a tub bottom section, a rear tub wall section, and a tub tail section connected in sequence. The tub head section, the tub bottom section, and the tub tail section are parallel to each other and the vertical distance between them is greater than a preset value. The vertical distance between the tub head section and the tub bottom section is greater than the vertical distance between the tub tail section and the tub bottom section. The tub head section and the tub tail section are both higher than the tub bottom section.

[0005] In this way, the cylinder tail section and cylinder head section of the bathtub-shaped cutoff line are both higher than the cylinder bottom section, which can increase the height of the elbow shoulder / cylinder tail section on the left side of the cutoff line, increase the lighting distance on the left side of the vehicle, and ensure the lighting effect on the left side of the vehicle.

[0006] According to a second aspect of the embodiments of this application, a vehicle lighting optical system is provided, wherein the vehicle lighting optical system is provided with a cut-off line baffle as described in any embodiment of the first aspect.

[0007] According to a third aspect of the embodiments of this application, a vehicle is provided, wherein the vehicle is provided with a headlight optical system as described in the second aspect.

[0008] In the aforementioned cutoff line baffle, automotive lighting optical system, and vehicle, the cutoff line baffle is positioned between the primary optical element and the light-emitting element. The cutoff line baffle has a bathtub-shaped shape on the side closest to the light-emitting element, controlling the illumination range of the light emitted by the light module converged by the primary optical element. The light emitted by the light-emitting element forms a light pattern with a bathtub-shaped cutoff line. Since the bathtub shape is composed of a cylinder head section, a front cylinder wall section, a cylinder bottom section, a rear cylinder wall section, and a cylinder tail section connected sequentially, the cylinder head section, cylinder bottom section, and cylinder tail section are parallel to each other and their perpendicular distance is greater than a preset value. The perpendicular distance between the cylinder head section and the cylinder bottom section is greater than the perpendicular distance between the cylinder tail section and the cylinder bottom section. Both the cylinder head section and the cylinder tail section are higher than the cylinder bottom section. Thus, compared to the straight cutoff line design with a lower left and higher right in the prior art, the cylinder tail section and cylinder head section of the bathtub-shaped cutoff line formed by the bathtub-shaped cutoff line baffle are both higher than the cylinder bottom section, which can increase the height of the left elbow / cylinder tail section of the cutoff line, increase the illumination distance on the left side of the vehicle, and ensure the illumination effect on the left side of the vehicle. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application 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 embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0010] Figure 1 This is a schematic diagram illustrating the lighting effect of a cutoff line in the prior art, as provided in an embodiment of this application.

[0011] Figure 2 This is a schematic diagram of a bathtub-type cutoff line baffle provided in an embodiment of this application.

[0012] Figure 3 This is a schematic diagram of a vehicle lighting optical system provided in an embodiment of this application.

[0013] Figure 4 This is a schematic diagram illustrating the lighting effect of a bathtub-type cutoff line baffle according to an embodiment of this application.

[0014] Figure 5 A schematic diagram of a bathtub-type cutoff line provided in an embodiment of this application. Figure 1 .

[0015] Figure 6 A schematic diagram of a bathtub-type cutoff line provided in an embodiment of this application. Figure 2 .

[0016] Figure 7 A schematic diagram of a bathtub-type cutoff line provided in an embodiment of this application. Figure 3 .

[0017] Figure 8 A schematic diagram of a bathtub-type cutoff line provided in an embodiment of this application. Figure 4 .

[0018] The reference numerals in the attached figures are as follows: 10. Cut-off line baffle; 11. Cylinder head section; 12. Front cylinder wall section; 13. Cylinder bottom section; 14. Rear cylinder wall section; 15. Cylinder tail section; 20. Light source; 30. Primary optical element; 40. Light-emitting element; 50. Optical path. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Overview As described in the background section, the cutoff lines for high and low beams of vehicles are typically a straight design with the left side lower than the right. Figure 1 As shown, the lighting distance on the left side of the vehicle is shorter than that on the right side, indicating that the lighting effect on the left side of the vehicle is poor.

[0021] Based on this, the inventors further discovered that the cutoff line baffle 10 is disposed between the primary optical element 30 and the light-emitting element 40. The side of the cutoff line baffle 10 closest to the light-emitting element 40 has a bathtub-shaped shape, controlling the illumination range of the light emitted by the light module converged by the primary optical element 30. The light emitted by the light-emitting element 40 forms a light pattern with a bathtub-shaped cutoff line. Since the bathtub shape is composed of the head section 11, the front wall section 12, the bottom section 13, the rear wall section 14, and the tail section 15 connected in sequence, the head section 11, the bottom section 13, and the tail section 15 are parallel to each other and have a large vertical distance between them. At a preset value, the vertical distance between the cylinder head section 11 and the cylinder bottom section 13 is greater than the vertical distance between the cylinder head section 11 and the cylinder bottom section 13, which is also greater than the vertical distance between the cylinder tail section 15 and the cylinder bottom section 13. Both the cylinder head section 11 and the cylinder tail section 15 are higher than the cylinder bottom section 13. Thus, compared to the straight cut-off line with a left-low and right-high design in the prior art, the cylinder tail section and cylinder head section of the bathtub-shaped cut-off line formed by the bathtub-shaped edge of the cut-off line baffle 10 are both higher than the cylinder bottom section. This can increase the height of the elbow shoulder on the left side of the cut-off line, that is, increase the height of the cylinder tail section on the cut-off line, thereby increasing the lighting distance on the left side of the vehicle and ensuring the lighting effect on the left side of the vehicle.

[0022] Based on the above concept, this specification provides a cutoff line baffle 10, which will be described in illustrative terms below with reference to the accompanying drawings.

[0023] Please see Figure 2 In one exemplary embodiment, a cutoff line baffle 10 is provided, which is applied in a vehicle, specifically in the vehicle's headlight optical system.

[0024] For example, the structure of a vehicle lighting optical system can be as follows: Figure 3 As shown, the cutoff line baffle 10 is disposed between the primary optical element 30 and the light-emitting element 40.

[0025] The primary optical element 30 is used to converge the light emitted from the vehicle's headlight module (light source 20). Specifically, the primary optical element 30 can be a concentrator or other optical elements, such as a reflector.

[0026] Specifically, the lighting module includes the lighting module for ordinary low beam headlights. This ordinary low beam headlight lighting module can be referred to as the low beam module.

[0027] Alternatively, the lighting module may include a low beam module and a low beam illumination unit for adaptive high beams. The module corresponding to / constituting the low beam illumination unit of the adaptive high beams can be called a low beam supplement module.

[0028] In addition, the light-emitting element 40 can be a lens, but it is not limited to a lens and can also be other optical elements.

[0029] Specifically, the cutoff line baffle 10 has a bathtub-shaped shape on the side near the light-emitting element 40. The cutoff line baffle 10 is used to control the illumination range of the light converged by the primary optical element 30, forming a light emission pattern with a bathtub-shaped cutoff line through the light-emitting element 40. The shape of the side of the cutoff line baffle 10 near the light-emitting element 40 is the cross-sectional shape of that side.

[0030] like Figure 2 As shown, on the cutoff line baffle 10, the bathtub type is composed of a tub head section 11, a front tub wall section 12, a tub bottom section 13, a rear tub wall section 14, and a tub tail section 15 connected in sequence. The tub head section 11, the tub bottom section 13, and the tub tail section 15 are parallel to each other and the vertical distance between them is greater than a preset value. The vertical distance between the tub head section 11 and the tub bottom section 13 is greater than the vertical distance between the tub tail section 15 and the tub bottom section 13. The tub head section 11 and the tub tail section 15 are both higher than the tub bottom section 13.

[0031] For example, the default value is 0. Of course, depending on the actual needs, the default value can also be set to a value greater than 0.

[0032] For example, the light emission pattern / illumination effect formed by the bathtub-shaped cutoff line baffle 10 with a bathtub-shaped cutoff line can be as follows: Figure 4 As shown. It can be seen that the illumination distance on the left side of the vehicle is relative to... Figure 1The lighting distance in the system has been significantly improved, i.e. increased.

[0033] Therefore, in this embodiment, the cutoff line baffle 10 is disposed between the primary optical element 30 and the light-emitting element 40. The cutoff line baffle 10 is shaped like a bathtub on the side closest to the light-emitting element 40, controlling the illumination range of the light emitted by the light module gathered by the primary optical element 30. The light emitted by the light-emitting element 40 forms a light pattern with a bathtub-shaped cutoff line. Since the bathtub shape is composed of a head section 11, a front wall section 12, a bottom section 13, a rear wall section 14, and a tail section 15 connected in sequence, the head section 11, the bottom section 13, and the tail section 15... The parallel and perpendicular distances between each other are greater than a preset value. The vertical distance between the cylinder head section 11 and the cylinder bottom section 13 is greater than the vertical distance between the cylinder head section 11 and the cylinder bottom section 13, which is also greater than the vertical distance between the cylinder tail section 15 and the cylinder bottom section 13. In this way, compared with the straight cut-off line with a lower left and higher right design in the prior art, the cylinder tail section and cylinder head section of the bathtub-shaped cut-off line formed by the bathtub-shaped cut-off line baffle 10 are both higher than the cylinder bottom section. This can ensure the height of the elbow shoulder / cylinder tail section on the left side of the cut-off line, increase the lighting distance on the left side of the vehicle, and ensure the lighting effect on the left side of the vehicle.

[0034] Depending on the actual operating conditions, the headlight module in the vehicle may have a certain downward tilt angle. Under different downward tilt angles, the angle between the optical axis of the headlight module and the horizontal plane varies, and the projection range of the light emitted by the headlight module in the vertical direction expands. In this case, by switching the cross-sectional shape of different cutoff line baffles 10, i.e., the specific structural parameters of the bathtub-shaped cutoff line, the specific shape of the bathtub-shaped cutoff line can be changed to meet the evaluation standards of the relevant lighting area. Specifically, in adjusting the specific structural parameters of the bathtub-shaped cutoff line, parameters such as the focal length of the headlight module and the distance between the cross-section of the cutoff line baffle 10 and the headlight module need to be considered. The following describes the specific structure of the bathtub-shaped cutoff line under different downward tilt angles.

[0035] To ensure lighting performance, in some embodiments, the vertical angle of the cylinder bottom section is -0.57°±0.1°, i.e., -0.67° to -0.47°, the vertical angle of the cylinder tail section is -0.3° to 0.2°, and the vertical angle of the cylinder head section is -0.1° to 0.6°.

[0036] That is, in the bathtub-shaped cross-sectional shape on the side of the cutoff line baffle 10 near the light-emitting element 40, the vertical angle of the bottom section is -0.67° to -0.47°, the vertical angle of the tail section is -0.3° to 0.2°, and the vertical angle of the head section is -0.1° to 0.6°.

[0037] The vertical angle of a point refers to the angle of that point relative to the horizontal baseline in the target plane.

[0038] Understandably, the horizontal baseline (HH line) is a key reference line that intersects the vertical baseline perpendicularly; it is a virtual straight line parallel to the ground on the target plane. The vertical baseline (VV line), as a key reference line defining the cutoff position of the headlights, is a virtual straight line on the target plane that passes through the reference center of the headlights (in this application, "light module" mainly refers to the headlight module itself) and is perpendicular to the ground. The reference center is the projection point of the geometric center or optical axis center of the headlight onto the target plane. The target plane is a plane located at a certain distance (generally 25-50m) in the vehicle's direction of travel, perpendicular to both the vehicle's direction of travel and the horizontal plane.

[0039] The horizontal and vertical reference lines intersect perpendicularly to form the origin (0°, 0°) of the coordinate system, used to locate the horizontal and vertical angles of each point on the cutoff line baffle / bathtub-shaped cutoff line. The vertical angle of a point is its angle relative to the horizontal reference line (the vertical plane in which it lies), and the horizontal angle of a point is its angle relative to the vertical reference line (the horizontal plane in which it lies). Generally, the x-coordinate of a point is its angle relative to the vertical reference line, and the y-coordinate of a point is its angle relative to the horizontal reference line.

[0040] For example, for a point a on the bathtub-shaped cutoff line of the beam pattern produced by the headlight illumination, the distance between point a and the vehicle in the longitudinal axis direction is d1, and the headlight height is h. Then the vertical angle of point a, that is, the angle of point a relative to the horizontal reference line, is determined to be -arc tan(h / d1). If point a is located on the right side of the vehicle and the distance between point a and the vehicle in the transverse axis direction is d2, then the horizontal angle of point a, that is, the angle of point a relative to the vertical reference line, is determined to be arc tan(d2 / d1).

[0041] Specifically, the vertical angle of the cylinder bottom section is -0.57° ± 0.1°. Here, -0.57° is the reference angle, and 0.1° in ± 0.1° is the allowable error / tolerance.

[0042] Specifically, the vertical angles of the tub bottom section 13, tub tail section 15, and tub head section 11 in the bathtub type are determined through calculation based on different evaluation criteria, combined with data such as the height of the lighting module, the downward tilt angle of the lighting module, and the focal length of related components. Detailed calculation processes can be found in existing technologies. The evaluation criteria include limitations on the anti-glare area and the area requiring illumination, as well as specific brightness requirements for each test point.

[0043] In this embodiment, in the bathtub type, there are certain vertical angle differences / height differences between the bottom section 13 and the tail section 15, and between the bottom section 13 and the head section 11. This can ensure that the height of the tail section / head section of the cutoff line is relatively high while meeting the technical requirements of different evaluation standards to guarantee the score. This ensures the lighting distance on the left and right sides of the vehicle and improves the lighting effect on the left and right sides of the vehicle. In particular, compared with the prior art, it can effectively increase the lighting distance on the left side of the vehicle and improve the lighting effect on the left side of the vehicle.

[0044] The vertical angle of the cylinder bottom section 13 is -0.57°±0.1°. Correspondingly, the height of the cylinder bottom section cutoff line formed by the light-blocking plate is -0.57°±0.1°. Combined with the headlight height, the height of the cylinder bottom section cutoff line is limited to less than 1m. This ensures the vehicle's close-range lighting effect as much as possible while preventing the headlights from glaring on other road users in front of the vehicle and affecting driving safety. If the vertical height of the cylinder bottom section 13 exceeds -0.57°±0.1°, it may cause glare to road users in front of the vehicle. If the vertical height of the cylinder bottom section 13 is less than -0.57°±0.1°, the vehicle's close-range lighting effect will be significantly reduced.

[0045] The vertical height of the cylinder tail section 15 is -0.3° to 0.2°. Correspondingly, the height of the cylinder tail section cutoff line formed by the light deflector is -0.3° to 0.2°. Combined with the headlight height, this height of the cylinder tail section cutoff line can maximize the illumination distance and visibility of oncoming pedestrians or non-motorized vehicle lanes while keeping the illumination height corresponding to the left elbow and shoulder below the eyes of oncoming drivers, or even below the lower legs of pedestrians. This avoids glare for oncoming road users and increases the test scores in the China New Car Assessment Program (CNCAP) regarding left-side road user visibility and curve lighting width. If the vertical height of the cylinder tail section 15 exceeds -0.3° to 0.2°, it may glare other road users on the left side of the vehicle. If the vertical height of the cylinder tail section 15 is below -0.3° to 0.2°, the close-range lighting effect on the left side of the vehicle will be significantly reduced.

[0046] The vertical height of cylinder head section 11 is -0.1° to 0.6°. Correspondingly, the height of the cylinder head section cutoff line formed by the light-blocking plate is -0.1° to 0.6°. Combined with the headlight height, this height of the cylinder head section cutoff line can, while maximizing the illumination distance and visibility of pedestrians or non-motorized vehicle lanes in the same direction, control the illumination height corresponding to the right elbow-shoulder cutoff line below the rearview mirror of vehicles traveling in the same direction. This avoids glare for road users traveling in the same direction, thereby increasing the CNCAP test score for test points such as visibility of road users on the right. If the vertical height of cylinder head section 11 exceeds -0.1° to 0.6°, it may cause glare to other road users on the right side of the vehicle. If the vertical height of cylinder head section 11 is lower than -0.1° to 0.6°, the close-range illumination effect on the right side of the vehicle will be significantly reduced.

[0047] When the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, in order to ensure the lighting effect and avoid glare to other road users, in some embodiments, the cut-off line baffle 10 includes a first cut-off line baffle. In the first cut-off line baffle, the vertical angle of the cylinder tail section is -0.3°~0°, and the vertical angle of the cylinder head section is 0.2°±0.1°, i.e., 0.1°~0.3°. In the bathtub-type cut-off line, the vertical angle of the cylinder tail section cut-off line is -0.3°~0°, and the vertical angle of the cylinder head section cut-off line is 0.2°±0.1°, i.e., 0.1°~0.3°.

[0048] Specifically, in the first cutoff line baffle, in the bathtub-shaped cross-section, the vertical angle of the tub tail section is -0.25° to 0°. Correspondingly, in the bathtub cutoff line, the vertical angle of the cutoff line of the tub tail section is -0.25° to 0°.

[0049] Additionally, 0.1° in ±0.1° represents the allowable error / tolerance.

[0050] In this embodiment, when the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, the illumination distance in the driving direction on both sides of the vehicle can be guaranteed based on the first cutoff line baffle. Moreover, the vertical angle of the cylinder head section is higher than that of the cylinder tail section, so different illumination distances can be used for the left and right sides of the vehicle to avoid dazzling other road users on the left.

[0051] Furthermore, based on similar reasons, when the low beam (lamp / module) height is less than 1m and the tilt angle is 1%, the vertical angle of the cylinder tail section in the first cutoff baffle is -0.3° to 0°, and the vertical angle of the cylinder head section is 0.2° ± 0.1°, i.e., 0.1° to 0.3°. Correspondingly, the vertical angle of the cylinder tail section cutoff line formed by this first cutoff baffle is -0.3° to 0°, and the vertical angle of the cylinder head section cutoff line is 0.1° to 0.3°. To ensure adequate low beam illumination distance on both sides of the vehicle and avoid glare to other road users, if the vertical angle of the cylinder tail section is not within the range of -0.3° to 0° and the vertical angle of the cylinder head section is not within the range of 0.1° to 0.3°, the cylinder tail section and cylinder head section cutoff line formed by the first cutoff line baffle may be higher than the height that would cause glare to other road users, thus causing glare, or may reduce the low beam illumination effect on both sides of the vehicle.

[0052] In addition, to ensure the lighting effect, in some embodiments, in the first cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is 0°, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 10°±0.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 35°±0.5°.

[0053] The horizontal angle at a point refers to the angle of that point relative to the vertical baseline in the target plane. For an introduction to the vertical baseline, please refer to the above content; it will not be repeated here.

[0054] That is, in the first cutoff line baffle, within the horizontal angle range of the cylinder bottom section, the horizontal angle of the left inflection point of the cylinder bottom section, i.e., the connection point between the cylinder bottom section and the rear cylinder wall section, is -7° to -3.5°, and the horizontal angle of the right inflection point, i.e., the connection point between the cylinder bottom section and the front cylinder wall section, is 0°.

[0055] For example, in the first cutoff line baffle, the horizontal angle range of the cylinder bottom section is -4° to 0°.

[0056] The ±0.2° is the allowable error / tolerance for the left inflection point of the cylinder bottom section. That is, the horizontal angle of the left inflection point of the cylinder bottom section is -7.2° to -3.3°.

[0057] Correspondingly, based on the cutoff line formed by the first cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section cutoff line is -7.2° to -3.3°, and the horizontal angle of the right inflection point of the cylinder bottom section cutoff line is 0°.

[0058] Where ±0.5° is the allowable error / tolerance of the angle between the cylinder bottom section and the front / rear cylinder wall section.

[0059] That is, the angle between the extension of the cutoff line of the rear cylinder wall section and the cutoff line of the cylinder bottom section is 9.5°~10.5°, and the angle between the extension of the cutoff line of the front cylinder wall section and the cutoff line of the cylinder bottom section is 34.5°~35.5°.

[0060] For example, the angle between the extension of the cutoff line of the rear cylinder wall section and the cutoff line of the cylinder bottom section is 10°, and the angle between the extension of the cutoff line of the front cylinder wall section and the cutoff line of the cylinder bottom section is 35°.

[0061] Furthermore, in the first cutoff line baffle, the horizontal angle (absolute value) of the left inflection point of the rear cylinder wall section, i.e., the connection point between the rear cylinder wall section and the cylinder tail section, is greater than or equal to -6° to -8°. Correspondingly, the horizontal angle of the left inflection point of the cutoff line of the rear cylinder wall section formed based on this first cutoff line baffle is greater than or equal to -6° to -8°. Thus, the horizontal angle (absolute value) of the left inflection point of the rear cylinder wall section, i.e., the connection point between the rear cylinder wall section and the cylinder tail section, is greater than or equal to -6° to -8°. This ensures a smooth transition between the cutoff line of the rear cylinder wall section and the cylinder tail section, maximizing illumination on the left side of the vehicle even on wide roads, and avoiding glare for road users on the left side of the vehicle. If the horizontal angle (absolute value) of the connection point between the rear cylinder wall section and the cylinder tail section is less than -6° to -8°, it may cause glare for road users in front of the vehicle or reduce the illumination effect on the left side of the vehicle.

[0062] For example, the horizontal angle of the left inflection point of the rear cylinder wall section is -6.5°. Depending on the actual needs, the horizontal angle of this point can also be other angles closer to the vertical reference line, such as -6.3°, or other angles further away from the vertical reference line, such as -7°.

[0063] For example, the angle, shape, and position of the bathtub-shaped cutoff line on the target plane can be as follows: Figure 5 As shown.

[0064] In this embodiment, when the height of the low beam (lamp / module) is less than 1m and the downward tilt angle is 1%, based on the setting of the horizontal angle of each part in the first cutoff line baffle, the first cutoff line baffle can ensure the illumination distance and illumination width of the vehicle in its driving direction, and ensure the vehicle lights score under the corresponding evaluation criteria.

[0065] Understandably, under the current conditions, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is 0°, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 10°±0.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 35°±0.5°. In this way, it is possible to control the bright area corresponding to the cylinder bottom section cutoff line in the cutoff line formed by the first cutoff line baffle to better avoid road participants in front of the vehicle, such as the location of the vehicle's exterior rearview mirror, so as to avoid dazzling the driver. In addition, the transition between the cylinder bottom section cutoff line and the front and rear cylinder wall section cutoff lines located on its left and right sides is relatively smooth and natural. The angle between the front cylinder wall section cutoff line and the cylinder bottom section cutoff line is greater than the angle between the rear cylinder wall section cutoff line and the cylinder bottom section cutoff line, which can illuminate the right side of the vehicle further and more, ensuring the need for focused lighting on the right side of the vehicle, thereby ensuring driving safety. If the horizontal angle (absolute value) of the left inflection point of the cylinder head section is greater than -7° to -3.5°, and the horizontal angle of the right inflection point of the cylinder head section is greater than 0°, the illumination width on the left and right sides of the vehicle will be reduced, decreasing the lighting effect. If the horizontal angle (absolute value) of the left inflection point of the cylinder head section is not greater than -7° to -3.5°, and the horizontal angle (considering positive and negative values) of the right inflection point of the cylinder head section is less than 0°, for example, -2° to -1°, the headlight beam is likely to shine onto the side mirrors of the vehicle in front, causing glare. Furthermore, if the angle between the extended lines of the rear cylinder wall section and the cylinder head section is not within the range of 10° ± 0.5°, and the angle between the extended lines of the front cylinder wall section and the cylinder head section is not within the range of 35° ± 0.5°, it may also cause glare or affect the lighting effect.

[0066] When the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, the vehicle's adaptive high beam is activated. The low beam in the adaptive high beam will be partially or fully activated or completely deactivated based on the actual operating conditions. In order to ensure the lighting effect and avoid glare to other road users, in some embodiments, the cut-off line baffle 10 includes a second cut-off line baffle. In the second cut-off line baffle, the vertical angle of the cylinder tail section is -0.3°~0.3°, and the vertical angle of the cylinder head section is -0.3°~0.1°. In the bathtub-shaped cut-off line, the vertical angle of the cylinder tail section cut-off line is -0.3°~0°, and the vertical angle of the cylinder head section cut-off line is 0.2°±0.1°, i.e., 0.1°~0.3°. The bathtub-shaped cut-off line is formed by superimposing the bright and dark cut-off lines of the vehicle's low beam lamp and the high and low beam cut-off lines of the vehicle's adaptive high beam lamp.

[0067] Specifically, in the second cutoff line baffle, in the bathtub-shaped cross-section, the vertical angle of the tub tail section is -0.25° to 0°. Correspondingly, in the bathtub-shaped cutoff line, the vertical angle of the cutoff line of the tub tail section is -0.25° to 0°.

[0068] The cutoff line of the vehicle's low beam headlights is also bathtub-shaped, and the vertical angle of the cylinder head section of this cutoff line is -0.3° to 0.1°.

[0069] In addition, the cut-off line for both high and low beams of the adaptive high beam headlights is also bathtub-shaped, with the vertical angle of the cylinder head section of the cut-off line being 0.1°~0.3°.

[0070] When the light and dark cut-off lines are superimposed with the high and low beam cut-off lines, the vertical angle range of the cylinder head section in the resulting bathtub-shaped cut-off line will adaptively change with the vehicle's steering angle. Specifically, for the cylinder head section cut-off line, the vertical angle range of this cut-off line is the cylinder head section cut-off line of the higher position among the light and dark cut-off lines and the high and low beam cut-off lines.

[0071] Additionally, 0.1° in ±0.1° represents the allowable error / tolerance.

[0072] In this embodiment, when the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, the vehicle's adaptive high beam is turned on, and when the low beam portion of the adaptive high beam is turned on, the illumination distance in the driving direction on both sides of the vehicle can be guaranteed based on the second cutoff line baffle. In addition, the vertical angle of the cylinder head section is higher than that of the cylinder tail section, which can provide illumination at different distances for the left and right sides of the vehicle, avoiding glare to other road users on the left side, while ensuring the dynamic turning illumination effect of the vehicle's lighting module.

[0073] For similar reasons, when the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, the vertical angle of the cylinder tail section in the second cutoff baffle is -0.3°~0.3°, and the vertical angle of the cylinder head section is -0.3°~0.1°. Correspondingly, the vertical angle of the cylinder tail section cutoff line formed by the second cutoff baffle is -0.3°~0.3°, and the vertical angle of the cylinder head section cutoff line is 0.1°~-0.3°. This can effectively ensure the low beam illumination distance on both sides of the vehicle and avoid glare to other road users on both sides. At this time, if the vertical angle of the cylinder tail section is not in the range of -0.3°~0°, and the vertical angle of the cylinder head section is not in the range of 0.1°~0.3°, then the cylinder tail section and cylinder head section cutoff lines formed by the second cutoff baffle may be higher than the height that would cause glare to other road users, thus causing glare, or may reduce the low beam illumination effect on both sides of the vehicle.

[0074] In addition, since the bathtub-shaped cutoff line is formed by superimposing the bright and dark cutoff line of the vehicle's low beam headlights and the dynamic high and low beam cutoff line of the vehicle's adaptive high beam headlights, when there is a need to adjust the cutoff line, such as when the vehicle is turning, the high and low beam cutoff lines of the adaptive high beam headlights change dynamically, and the bright and dark cutoff line of the low beam headlights superimposes with the high and low beam cutoff lines, which can achieve better dynamic lighting and meet the needs of cornering lighting.

[0075] In addition, to ensure lighting effects, in some embodiments, in the second cutoff line baffle, the horizontal angle of the left inflection point of the bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the bottom section is 3.5° to 7°, the angle between the extension line of the rear cylinder wall section and the bottom section is 10°±0.5°, and the angle between the extension line of the front cylinder wall section and the bottom section is 35°±0.5°; in the bathtub-shaped cutoff line, the horizontal angle of the left inflection point of the bottom section cutoff line is -7° to -3.5°, the horizontal angle of the right inflection point of the bottom section cutoff line is 3.5° to 7°, and the angle between the cylinder head section cutoff line and the bottom section cutoff line is 90°.

[0076] For example, in the second cutoff line baffle, within the horizontal angle range of the cylinder bottom section, the angle of the left inflection point, i.e. the connection point between the cylinder bottom section and the rear cylinder wall section, is -4°, and the angle of the right inflection point, i.e. the connection point between the cylinder bottom section and the front cylinder wall section, is 1°.

[0077] Where ±0.2° is the allowable error / tolerance for the left inflection point of the cylinder bottom section. That is, the horizontal angle of the left inflection point of the cylinder bottom section is -7.2° to -3.3°, and the horizontal angle of the right inflection point of the cylinder bottom section is -3.3° to 7°. Correspondingly, the horizontal angle of the left inflection point of the cylinder bottom section cutoff line is -7.2° to -3.3°, and the horizontal angle of the right inflection point of the cylinder bottom section cutoff line is -3.3° to 7.2°.

[0078] Understandably, based on the dynamic cornering lighting function, the angle of the right corner may adaptively increase or decrease as the vehicle's turning angle changes.

[0079] The angle between the extension lines of the rear cylinder wall section and the cylinder bottom section is 9.5°~10.5°, and the angle between the extension lines of the front cylinder wall section and the cylinder bottom section is 34.5°~35.5°.

[0080] Where ±0.5° is the allowable error / tolerance of the angle between the cylinder bottom section and the front / rear cylinder wall section.

[0081] Furthermore, in the second cutoff line baffle, the horizontal angle of the left inflection point of the rear cylinder wall section, i.e., the connection point between the rear cylinder wall section and the cylinder tail section, is greater than or equal to -6° to -8°. Based on this second cutoff line baffle, the horizontal angle of the left inflection point of the cutoff line of the rear cylinder wall section is greater than or equal to -6° to -8°.

[0082] For example, the horizontal angle of the connection point is -6.5°, or, depending on the actual needs, the angle of the connection point is other angles closer to the vertical baseline, such as -6.3°, or other angles further away from the vertical baseline, such as -7°.

[0083] Thus, the horizontal angle (absolute value) at the left inflection point of the rear cylinder wall section, i.e., the connection point between the rear cylinder wall section and the cylinder tail section, is greater than or equal to -6° to -8°. This ensures a smooth transition between the cutoff line of the rear cylinder wall section and the cutoff line of the cylinder bottom section, maximizing illumination on the left side of the vehicle even on wide roads, and avoiding glare for road users on the left side of the vehicle. If the horizontal angle (absolute value) at the connection point between the rear cylinder wall section and the cylinder tail section is less than -6° to -8°, it may cause glare for road users in front of the vehicle or reduce the illumination effect on the left side of the vehicle.

[0084] For example, taking a 0.5° angle at the right inflection point of the bathtub-shaped cutoff line (ADB cutoff line) as an example, the ADB cutoff line is a complete bathtub-shaped cutoff line. The angle, shape, and position of this bathtub-shaped cutoff line on the target plane can be as follows: Figure 6 As shown.

[0085] In this embodiment, when the low beam (lamp / module) height is less than 1m and the downward tilt angle is 1%, based on the setting of the horizontal angle of each part in the second cutoff line baffle, the second cutoff line baffle can ensure the illumination distance and illumination width of the vehicle in its driving direction, and ensure the vehicle lights score under the corresponding evaluation criteria.

[0086] Understandably, under the current conditions, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is -3.5° to 7°, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 10°±0.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 35°±0.5°. In this way, it is possible to control the bright area corresponding to the cylinder bottom section cutoff line in the cutoff line formed by the second cutoff line baffle to better avoid road participants in front of the vehicle, such as the location of the vehicle's exterior rearview mirror, so as to avoid dazzling the driver. In addition, the transition between the cylinder bottom section cutoff line and the front and rear cylinder wall section cutoff lines located on its left and right sides is relatively smooth and natural. The angle between the front cylinder wall section cutoff line and the cylinder bottom section cutoff line is greater than the angle between the rear cylinder wall section cutoff line and the cylinder bottom section cutoff line, which can illuminate the right side of the vehicle further and more, ensuring the need for focused lighting on the right side of the vehicle, thereby ensuring driving safety. In addition, the horizontal angle range of the cylinder bottom section is symmetrically set. When there is a need to adjust the cutoff line, such as when the vehicle is turning, the dynamic change of the high and low beam cutoff lines of the vehicle's adaptive high beam headlights can ensure that it will not block the areas that need illumination, nor will it keep the area illuminated when it needs to be dark. This can achieve dynamic cornering lighting well.

[0087] If the horizontal angle of the left inflection point of the cylinder head section exceeds -7° to -3.5°, and / or the angle of the right inflection point exceeds 3.5° to 7°, the illumination width on the left and right sides of the vehicle will be reduced, decreasing the lighting effect. If the horizontal angle of the left inflection point of the cylinder head section is less than -7° to -3.5° (e.g., -2°), and the horizontal angle of the right inflection point is less than 3.5° to 7° (e.g., 2°), the headlight beam may shine onto the side mirrors of vehicles ahead, causing glare. Furthermore, if the angle between the extended lines of the rear cylinder wall section and the cylinder head section is not within 10° ± 0.5°, and the angle between the extended lines of the front cylinder wall section and the cylinder head section is not within 35° ± 0.5°, glare or impaired lighting performance may also occur.

[0088] When the low beam (lamp / module) height is greater than 1m and the downward tilt angle is 1.5%, in order to ensure the lighting effect and avoid glare to other road users, in some embodiments, the cut-off line baffle 10 includes a third cut-off line baffle. In the third cut-off line baffle, the vertical angle of the cylinder tail section is -0.1°~0.2° and the vertical angle of the cylinder head section is 0.5°~0.1°; in the bathtub-shaped cut-off line, the vertical angle of the cylinder tail section cut-off line is -0.1°~0.2° and the vertical angle of the cylinder head section cut-off line is 0.5°~0.1°.

[0089] Specifically, in the third cutoff line baffle, in the bathtub-shaped cross-section, the vertical angle of the tub tail section is -0.05° to 0.2°. Correspondingly, in the bathtub cutoff line, the vertical angle of the cutoff line of the tub tail section is -0.25° to 0.2°.

[0090] In this embodiment, when the low beam (lamp / module) height is greater than 1m and the downward tilt angle is 1.5%, the illumination distance in the driving direction on both sides of the vehicle can be guaranteed based on the third cut-off line baffle. In addition, the vertical angle of the cylinder head section is higher than that of the cylinder tail section, so different illumination distances can be provided for the left and right sides of the vehicle to avoid glare to other road users on the left.

[0091] Furthermore, for similar reasons, when the low beam (lamp / module) height is greater than 1m and the tilt angle is 1.5%, the vertical angle of the cylinder tail section in the third cutoff baffle is -0.1°~0.2°, and the vertical angle of the cylinder head section is 0.5°~0.1°. Correspondingly, the vertical angle of the cylinder tail section cutoff line formed by this third cutoff baffle is -0.1°~0.2°, and the vertical angle of the cylinder head section cutoff line is 0.5°~0.1°, which can effectively... To ensure the low beam illumination distance on both sides of the vehicle and avoid dazzling other road users on both sides, if the vertical angle of the cylinder tail section is not in the range of -0.1° to 0.2° and the vertical angle of the cylinder head section is not in the range of 0.5° to 0.1°, then the cylinder tail section and cylinder head section cutoff line formed by the third cutoff line baffle may be higher than the height that would cause dazzling other road users, thus causing dazzling, or may reduce the low beam illumination effect on both sides of the vehicle.

[0092] In addition, to ensure the lighting effect, in some embodiments, in the third cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is 0°, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 15°±0.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 40°±0.5°.

[0093] For example, in the third cutoff line baffle, within the horizontal angle range of the cylinder bottom section, the angle of the left inflection point, i.e. the connection point between the cylinder bottom section and the rear cylinder wall section, is -4°, and the angle of the right inflection point, i.e. the connection point between the cylinder bottom section and the front cylinder wall section, is 0°.

[0094] The allowable error / tolerance for the left inflection point of the cylinder bottom section is ±0.2°. That is, in the third cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section is -7.2° to -3.3°, and the horizontal angle of the right inflection point of the cylinder bottom section is 0°.

[0095] Where ±0.5° is the allowable error / tolerance for the angle between the cylinder bottom section and the front / rear cylinder wall sections. That is, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 14.5°~15.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 39.5°~40.5°.

[0096] Additionally, the horizontal angle of the left inflection point of the rear cylinder wall section, i.e., the connection point between the rear cylinder wall section and the cylinder tail section, is greater than or equal to -6° to -8°. Correspondingly, the horizontal angle of the left inflection point of the rear cylinder wall section cutoff line formed based on this third cutoff line baffle is greater than or equal to -6° to -8°. For example, the horizontal angle of this connection point is -6.5° or another angle closer to the vertical reference line, such as -6.3°, or another angle further away from the vertical reference line, such as -7°.

[0097] This ensures a smooth transition between the rear cylinder wall section cutoff line and the cylinder bottom section cutoff line, maximizing illumination on the left side of the vehicle even on wider roads and avoiding glare for road users on the left side. If the horizontal angle (absolute value) at the connection point between the rear cylinder wall section and the cylinder tail section is less than -6° to -8°, it may cause glare for road users in front of the vehicle or reduce the illumination effect on the left side of the vehicle.

[0098] For example, the angle, shape, and position of the bathtub-shaped cutoff line on the target plane can be as follows: Figure 7 As shown.

[0099] In this embodiment, when the low beam (lamp / module) height is greater than 1m and the downward tilt angle is 1.5%, based on the setting of the horizontal angle of each part in the third cutoff line baffle, the third cutoff line baffle can ensure the illumination distance and illumination width of the vehicle in its driving direction, and ensure the vehicle lights score under the corresponding evaluation criteria.

[0100] Understandably, under the current conditions, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, and the horizontal angle of the right inflection point of the cylinder bottom section is 0°. This allows the bright area corresponding to the cylinder bottom section cutoff line in the cutoff line formed by the third cutoff line baffle to better avoid road users in front of the vehicle, such as the location of the driver's side rearview mirror, thus avoiding glare for the driver. Furthermore, the angle between the extension line of the rear cylinder wall section and the cylinder bottom section is 10°±0.5°, and the angle between the extension line of the front cylinder wall section and the cylinder bottom section is 35°±0.5°. The transition between the cylinder bottom section cutoff line and the front and rear cylinder wall section cutoff lines located on its left and right sides is relatively smooth and natural. The angle between the front cylinder wall section cutoff line and the cylinder bottom section cutoff line is greater than the angle between the rear cylinder wall section cutoff line and the cylinder bottom section cutoff line, which can illuminate the right side of the vehicle further and more extensively, ensuring the need for focused lighting on the right side of the vehicle, thereby ensuring driving safety. In the third cutoff line baffle, if the horizontal angle of the left inflection point of the cylinder bottom section exceeds -7° to -3.5°, for example, -8°, the illumination width on the left side of the vehicle will be reduced, resulting in poor lighting performance. Conversely, if the horizontal angle of the right inflection point of the cylinder bottom section exceeds 0°, for example, 4°, the headlight beam may illuminate the side mirror of the vehicle in front, causing glare for other road users. Furthermore, if the angle between the extended lines of the rear cylinder wall section and the cylinder bottom section is not within 10° ± 0.5°, or the angle between the extended lines of the front cylinder wall section and the cylinder bottom section is not within 35° ± 0.5°, glare or impaired lighting performance may occur.

[0101] The specific dimensions of the first, second, and third cutoff line baffles in the above embodiments are designed based on a large number of calculations and experiments. Based on the first, second, and third cutoff lines, a cutoff line with a high score under the CNCAP standard can be obtained. Depending on the actual working conditions, the controller in the vehicle can select any one of the first, second, and third cutoff line baffles to control the light output pattern of the lighting module.

[0102] Thus, in the bathtub-shaped cutoff line formed by the first, second, and third cutoff line baffles, the cylinder head, cylinder tail, and cylinder bottom sections are parallel to each other, and the vertical distance between them is greater than a preset value. The cylinder head and cylinder tail sections are both higher than the cylinder bottom section, which improves the visibility illumination distance for pedestrians on the left. Furthermore, the central concave portion of the bathtub-shaped cutoff line, i.e., the cylinder bottom section, better balances the requirements of "illumination brightness" and "anti-glare," avoiding the risk of glare to oncoming drivers due to excessive scattering of a flat light beam. Additionally, while a flat low-beam cutoff line can clearly distinguish between illuminated and unilluminated areas, the illumination range is relatively fixed and may not provide sufficient illumination in some special road conditions. In this embodiment, the bathtub-shaped low-beam cutoff line is concave in the middle region, which increases the illumination width and brightness of the near-field area in front of the vehicle without affecting oncoming vehicles and pedestrians. For example, when driving on narrow streets or curves, the driver can see roadside obstacles, pedestrians, or traffic signs more clearly and react in advance. Additionally, a straight cutoff line can create blind spots at certain angles, while a bathtub-shaped design effectively reduces these blind spots by optimizing light distribution. When a vehicle is turning, a bathtub-shaped low beam cutoff line provides better side illumination, allowing the driver to have a clearer view of the curve and improving driving safety.

[0103] In addition to CNCAP, designing the cut-off line baffle 10 can also result in a cut-off line that scores higher under other standards, such as the Federal Motor Vehicle Safety Standards (FMVSS) and other similar standards.

[0104] To ensure lighting effect, in some embodiments, the cutoff line baffle 10 further includes a fourth cutoff line baffle. In the fourth cutoff line baffle, the cylinder bottom section further includes a concave portion and a non-concave portion. The two sides of the concave portion are respectively connected to the non-concave portion and the rear cylinder wall section. The vertical angle of the non-concave portion is -0.4°±0.1°, that is, -0.5°~-0.3°. The vertical angle of the concave point in the concave portion is -0.6°~-0.9°. The vertical angle of the cylinder head section is 0°±0.1°, that is, -0.1°~0.1°. The vertical angle of the cylinder tail section is -0.4°~0°.

[0105] The allowable error / tolerance for the vertical angle between the concave and non-concave portions is ±0.1°.

[0106] In addition, the permissible error / tolerance for the vertical angle of the cylinder head section is ±0.1°.

[0107] For example, the vertical angle of the recessed portion is -0.8°.

[0108] Thus, in this embodiment, based on the vertical angle settings of each part of the fourth cutoff line baffle, the fourth cutoff line baffle can ensure the illumination distance and illumination width of the vehicle in its driving direction, while ensuring the vehicle's headlights score under the corresponding evaluation standard, such as the FMVSS standard. Specifically, the vertical angle of the concave portion of the cylinder bottom section is -0.4°±0.1°, and the vertical angle of the cylinder head section is -0°±0.1°. Correspondingly, the vertical angle of the cutoff line of the concave portion of the cylinder bottom section is -0.4°±0.1°, and the vertical angle of the cutoff line of the cylinder head section is 0°±0.1°. This ensures a clear transition of the horizontal cutoff line on the left and the upward-sloping cutoff line on the right, avoiding glare for drivers of oncoming vehicles. The vertical angle range of the concave point in the concave portion is -0.6° to -0.9°, which is lower than the height of the non-concave portion, enhancing the sharpness of the cutoff line edge and reducing stray light scattering upwards, thereby effectively meeting the needs of close-range lighting. In addition, the vertical angle of the cylinder tail section is -0.4° to 0°, which can ensure that the lighting range corresponding to the cylinder tail section cutoff line is kept within a certain range of the reference center height, thereby better meeting the vehicle's close-range lighting needs.

[0109] In addition, to ensure lighting effect, in some embodiments, in the fourth cutoff line baffle, the horizontal angle of the left inflection point of the rear cylinder wall section is -4.5° to -7.5°, the horizontal angle of the right inflection point of the front cylinder wall section is -1° to 0.5°, the horizontal angle of the concave point in the concave portion is -3.7° to -3.3°, the angle between the extension line of the front cylinder wall section and the non-concave portion is 30° to 60°, the angle between the cylinder tail section and the horizontal extension line of the concave point is 15° to 60°, and the angle between the non-concave portion and the horizontal extension line of the concave point is 15° to 60°.

[0110] For example, the horizontal angle of the left inflection point of the concave portion is -5°, and the horizontal angle of the right inflection point of the front cylinder wall section is -0.6°.

[0111] The permissible error / tolerance for the horizontal angle of the left inflection point of the concave portion and the right inflection point of the front cylinder wall section is ±0.2°.

[0112] For example, the rear cylinder wall section is part of the concave portion, and the horizontal angle of the connection point between the concave portion / rear cylinder wall section and the cylinder tail section, i.e., the left inflection point of the rear cylinder wall section, is -5°±0.2°, i.e., -5.2°~ -4.8°.

[0113] For example, the angle, shape, and position of the bathtub-shaped cutoff line on the target plane can be as follows: Figure 8 As shown.

[0114] In this embodiment, based on the horizontal angle settings of each part of the fourth cutoff line baffle, the fourth cutoff line baffle ensures the illumination distance and illumination width of the vehicle in its driving direction, guaranteeing the vehicle's headlights score under the corresponding evaluation criteria. Specifically, the horizontal angle of the left inflection point of the rear cylinder wall section is 4.5° to -7.5°, and the horizontal angle of the right inflection point of the front cylinder wall section is -1° to 0.5°. This ensures that the illumination height of the cylinder wall sections before and after the cutoff line is within 60% to 80% of the headlight beam center height, guaranteeing close-range illumination of the road ahead of the vehicle and preventing light from spilling into the oncoming lane. The horizontal angle of the right inflection point of the front cylinder wall section is -1° to 0.5°, and the angle between the cylinder tail section and the horizontal extension line of the concave point is 15° to 60°, forming a steep cutoff edge, which effectively reduces upward light scattering and avoids glare. The horizontal angle of the concave point is -3.7° to -3.3°, which allows the cutoff line to form a steeper bend in a local area. Combined with the angle of 15° to 60° between the non-concave part and the horizontal extension line of the concave point, it ensures the illuminance of light in the area above the cutoff line, avoiding glare for oncoming drivers. The angle between the front cylinder wall section and the extension line of the non-concave part is 30° to 60°, and the angle between the cylinder tail section and the horizontal extension line of the concave point is 15° to 60°. This allows a "knife-cut" light-dark boundary line to be formed based on the fourth cutoff line baffle, resulting in a higher rate of change in brightness gradient.

[0115] In the above embodiments, the specific dimensions of the fourth cut-off line baffle are designed based on the FMVSS evaluation standard to obtain a cut-off line with a higher score under the FMVSS standard. Depending on the actual working conditions, the controller in the vehicle can select any one of the fourth or other cut-off line baffles to control the light output pattern of the lighting module.

[0116] This application also provides a vehicle equipped with the headlight optical system described above.

[0117] It should be noted that the above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize that certain variations, modifications, alterations, additions, and sub-combinations thereof should be within the scope of protection claimed in this application.

Claims

1. A cutoff line baffle, characterized in that, The cutoff line baffle is disposed between the primary optical element and the light-emitting element; The primary optical element is used to converge the light emitted by the vehicle's headlight module; The cutoff line baffle is shaped like a bathtub on the side near the light-emitting element. The cutoff line baffle is used to control the illumination range of the light converged by the primary optical element, and the light-emitting element forms a light-emitting pattern with a bathtub-shaped cutoff line. The bathtub is composed of a tub head section, a front tub wall section, a tub bottom section, a rear tub wall section, and a tub tail section connected in sequence. The tub head section, the tub bottom section, and the tub tail section are parallel to each other and the vertical distance between them is greater than a preset value. The vertical distance between the tub head section and the tub bottom section is greater than the vertical distance between the tub tail section and the tub bottom section. The tub head section and the tub tail section are both higher than the tub bottom section.

2. The cutoff line baffle according to claim 1, characterized in that, The vertical angle of the cylinder bottom section is -0.57°±0.1°, the vertical angle of the cylinder tail section is -0.3°~0.2°, and the vertical angle of the cylinder head section is -0.1°~0.6°.

3. The cutoff line baffle according to claim 2, characterized in that, The cutoff line baffle includes a first cutoff line baffle, wherein the vertical angle of the cylinder tail section is -0.3° to 0° and the vertical angle of the cylinder head section is 0.2° ± 0.1°; in the bathtub-shaped cutoff line, the vertical angle of the cutoff line of the cylinder tail section is -0.3° to 0° and the vertical angle of the cutoff line of the cylinder head section is 0.2° ± 0.1°.

4. The cutoff line baffle according to claim 3, characterized in that, In the first cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is 0°, the angle between the rear cylinder wall section and the extension line of the cylinder bottom section is 10°±0.5°, and the angle between the front cylinder wall section and the extension line of the cylinder bottom section is 35°±0.5°.

5. The cutoff line baffle according to claim 2, characterized in that, The cutoff line baffle includes a second cutoff line baffle, wherein the vertical angle of the cylinder tail section is -0.3° to 0.3° and the vertical angle of the cylinder head section is -0.3° to 0.1°; the bathtub-shaped cutoff line has a vertical angle of -0.3° to 0° for the cylinder tail section cutoff line and a vertical angle of 0.2° ± 0.1° for the cylinder head section cutoff line, and the bathtub-shaped cutoff line is formed by superimposing the light and dark cutoff lines of the vehicle's low beam headlights and the high and low beam cutoff lines of the vehicle's adaptive high beam headlights.

6. The cutoff line baffle according to claim 5, characterized in that, In the second cutoff line baffle, the horizontal angle of the left inflection point of the bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the bottom section is 3.5° to 7°, the angle between the extension line of the rear cylinder wall section and the bottom section is 10° ± 0.5°, and the angle between the extension line of the front cylinder wall section and the bottom section is 35° ± 0.5°; in the bathtub-shaped cutoff line, the horizontal angle of the left inflection point of the bottom section cutoff line is -7° to -3.5°, the horizontal angle of the right inflection point of the bottom section cutoff line is 3.5° to 7°, and the angle between the cylinder head section cutoff line and the front cylinder wall section cutoff line is 90°.

7. The cutoff line baffle according to claim 2, characterized in that, The cutoff line baffle includes a third cutoff line baffle, wherein the vertical angle of the cylinder tail section is -0.1° to 0.2° and the vertical angle of the cylinder head section is 0.5° to 0.1°; in the bathtub-type cutoff line, the vertical angle of the cutoff line of the cylinder tail section is -0.1° to 0.2° and the vertical angle of the cutoff line of the cylinder head section is 0.5° to 0.1°.

8. The cutoff line baffle according to claim 7, characterized in that, In the third cutoff line baffle, the horizontal angle of the left inflection point of the cylinder bottom section is -7° to -3.5°, the horizontal angle of the right inflection point of the cylinder bottom section is 0°, the angle between the rear cylinder wall section and the extension line of the cylinder bottom section is 15°±0.5°, and the angle between the front cylinder wall section and the extension line of the cylinder bottom section is 40°±0.5°.

9. The cutoff line baffle according to claim 1, characterized in that, The cutoff line baffle also includes a fourth cutoff line baffle. In the fourth cutoff line baffle, the cylinder bottom section further includes a concave portion and a non-concave portion. The two sides of the concave portion are respectively connected to the non-concave portion and the rear cylinder wall section. The vertical angle of the non-concave portion is -0.4°±0.1°. The vertical angle range of the concave point in the concave portion is -0.6° to -0.9°. The vertical angle of the cylinder head section is 0°±0.1°. The vertical angle of the cylinder tail section is -0.4° to 0°.

10. The cutoff line baffle according to claim 9, characterized in that, In the fourth cutoff line baffle, the horizontal angle of the left inflection point of the rear cylinder wall section is -4.5° to -7.5°, the horizontal angle of the right inflection point of the front cylinder wall section is -1° to 0.5°, the horizontal angle of the concave point in the concave portion is -3.7° to -3.3°, the angle between the extension line of the front cylinder wall section and the non-concave portion is 30° to 60°, the angle between the cylinder tail section and the horizontal extension line of the concave point is 15° to 60°, and the angle between the non-concave portion and the horizontal extension line of the concave point is 15° to 60°.

11. A vehicle lighting optical system, characterized in that, The system includes a light source, a primary optical element, a light-emitting element, and a cutoff line baffle as described in any one of claims 1 to 10.

12. A vehicle, characterized in that, The vehicle is equipped with the headlight optical system as described in claim 11.

Images