Guided design method, device and equipment for automobile headlamp and medium

Abstract

The embodiment of the invention discloses a guidance design method, device and equipment for an automobile headlamp and a medium, and the guidance design method comprises the steps: firstly, obtaining the shape parameters and the relative position relation of a light guide structure, a lampshade structure, a grating flanging structure and a grating main body structure, so as to construct a three-dimensional virtual simulation model, and then obtaining a three-dimensional simulation model based on a total reflection theorem; simulating propagation path information of all the total reflection light rays in the three-dimensional virtual simulation model, and then determining the last total reflection light ray according to the propagation path information of all the total reflection light rays; and finally, when the value of the coordinate of at least one point in the first direction is smaller than or equal to the value of the coordinate of a target point on the grating main body structure in the first direction on the propagation path corresponding to the last total reflection light, the grating main body structure is formed. And adjusting the shape parameter of at least one of the light guide structure, the lampshade structure, the grating flanging structure and the grating main body structure and / or the relative position relation of at least two corresponding structures.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of vehicle design, and in particular, to a guiding design method, device, equipment and medium for an automotive headlamp. Background Art

[0002] For the daytime running function and position function of automotive headlamps, an illumination scheme of LED, a PCB substrate and a light guide structure is now commonly adopted. However, due to the light-emitting characteristics of the light guide structure, the light guide structure emits light by locally destroying total reflection. Therefore, the un-emitted light will accumulate at the end of the light guide structure and finally be emitted from the end of the light guide structure and scattered at the corresponding light guide bracket or lamp cover position. It is easy to have the situation that the brightness at the end of the light guide structure is too bright, which will cause bright spots in the user's vision, resulting in poor appearance and poor brightness uniformity of the automotive headlamp.

[0003] Therefore, it is urgent in this field to reasonably design the structure and parameters of automotive headlamps to avoid the situation of super bright spots at the end of the light guide structure and bring a bad visual experience to users. Summary of the Invention

[0004] The embodiments of the present invention provide a guiding design method, device, equipment and medium for an automotive headlamp, which can efficiently process the light at the end of the light guide structure, thereby reducing the brightness difference when observed from a certain direction, avoiding the situation of obvious super bright spots at the end of the light guide structure, improving the user's visual experience, being beneficial to improving the illumination effect of the automotive headlamp, and making the brightness of the automotive headlamp more uniform.

[0005] In a first aspect, the embodiments of the present invention provide a guiding design method for an automotive headlamp. The automotive headlamp includes a light guide structure and a lamp cover structure. The light guide structure includes a main body section and a tail section. The lamp cover structure includes a transparent part and a non-transparent part that are fixedly connected. The light-emitting surface of the main body section and the light-emitting surface of the tail section face different positions of the transparent part. The light emitted from the light-emitting surface of the tail section is incident on the grille flanging structure through the corresponding transparent part, and at least one total reflection occurs between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part for the light emitted from the light-emitting surface of the tail section;

[0006] The guiding design method includes:

[0007] Obtain the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure and the grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flanging structure and the grille main body structure are integrated;

[0008] Based on the total internal reflection theorem, simulate the propagation path information of all the total internal reflection light rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model;

[0009] Determine the last total internal reflection light ray according to the propagation path information of all the total internal reflection light rays;

[0010] When there is at least one point on the propagation path corresponding to the last total internal reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main structure in the first direction, adjust the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flanging structure and the grille main structure and / or the relative position relationship between at least two of them until the value of the coordinate of any point on the propagation path corresponding to the last total internal reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main structure in the first direction; wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle.

[0011] In a second aspect, an embodiment of the present invention further provides a guiding design device for an automotive headlamp. The automotive headlamp includes a light guide structure and a lamp cover structure. The light guide structure includes a main body section and a tail section. The lamp cover structure includes a transparent part and a non-transparent part that are fixedly connected. The light-emitting surfaces of the main body section and the tail section face different positions of the transparent part. The light rays emitted from the light-emitting surface of the tail section are incident on the grille flanging structure through the corresponding transparent part, and the light rays emitted from the light-emitting surface of the tail section undergo at least one total internal reflection between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part;

[0012] The guiding design device includes:

[0013] A model construction module, configured to obtain the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure and the grille main structure, so as to construct a three-dimensional virtual simulation model; wherein, the grille flanging structure and the grille main structure are integrated;

[0014] A path simulation module, configured to simulate the propagation path information of all the total internal reflection light rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model based on the total internal reflection theorem;

[0015] A last determination module, configured to determine the last total internal reflection light ray according to the propagation path information of all the total internal reflection light rays;

[0016] A data processing module, configured to adjust at least one of the shape parameters and / or the relative position relationship between at least two corresponding ones of the light guide structure, the lamp housing structure, the grille flange structure and the grille main body structure when there is at least one point on the propagation path corresponding to the last total reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, until the value of the coordinate of any point on the propagation path corresponding to the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure in the first direction; wherein, the first direction is parallel to the direction from the head of the vehicle to the tail of the vehicle.

[0017] In a third aspect, an embodiment of the present invention further provides a terminal device, including:

[0018] One or more processors;

[0019] A storage device, configured to store one or more programs;

[0020] When the one or more programs are executed by the one or more processors, the one or more processors implement the guiding design method of the automotive headlamp as described in any one of the first aspects.

[0021] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the guiding design method of the automotive headlamp as described in any one of the first aspects.

[0022] An embodiment of the present invention provides a guiding design method, device, equipment and medium for an automotive headlamp. The guiding design method first obtains the shape parameters and relative position relationships of a light guide structure, a lamp cover structure, a grille flange structure and a grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flange structure and the grille main body structure are integrated. Then, based on the total reflection theorem, the propagation path information of all total reflection light rays between the surface of the non-transparent part close to the grille flange structure and the surface of the grille flange structure close to the non-transparent part is simulated in the three-dimensional virtual simulation model. After that, according to the propagation path information of all total reflection light rays, the last total reflection light ray is determined. Finally, when there is at least one point on the propagation path corresponding to the last total reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main body structure and / or the relative position relationships of at least two corresponding thereto are adjusted until the value of the coordinate of any point on the propagation path corresponding to the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure in the first direction; wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle. By using the above method, the propagation path information of at least one total reflection light ray corresponding to the light rays emitted from the light-emitting surface at the end section is simulated in the three-dimensional virtual simulation model, and according to the comparison result of the coordinate information on the propagation path corresponding to the last total reflection light ray and the coordinate information of the target point on the grille main body structure, the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main body structure and / or the relative position relationships of at least two corresponding thereto are feedback-adjusted, realizing the efficient processing of the light rays at the end of the light guide structure, diverging the light rays at the end of the light guide structure, thereby reducing the brightness difference when observed from a certain direction, avoiding the situation of obvious super-bright spots at the end of the light guide structure, improving the user's visual experience, being beneficial to improving the lighting effect of the automotive headlamp, making the brightness of the automotive headlamp more uniform, providing guiding design significance for the structural design of the automotive headlamp, enabling the designed automotive headlamp structure to have the ability to solve the obvious super-bright spots at the end of the light guide structure, and thus being applicable to more vehicle models. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic plan view of an automotive headlamp provided by an embodiment of the present invention;

[0024] Figure 2 is Figure 1 a schematic cross-sectional view of the shown automotive headlamp along the AA' direction;

[0025] Figure 3 is Figure 1Schematic cross-sectional structure diagram of the front car headlight shown in the direction of BB';

[0026] Figure 4 is Figure 2 Schematic diagram of the labeling of the total reflection surface in the cross-sectional structure shown;

[0027] Figure 5 Schematic flow diagram of a guiding design method for a car headlight provided by an embodiment of the present invention;

[0028] Figure 6 is Figure 2 An optical path diagram of the propagation path of the total reflection light in the cross-sectional structure shown;

[0029] Figure 7 is Figure 2 Another optical path diagram of the propagation path of the total reflection light in the cross-sectional structure shown;

[0030] Figure 8 Schematic flow diagram of another guiding design method for a car headlight provided by an embodiment of the present invention;

[0031] Figure 9 Schematic flow diagram of yet another guiding design method for a car headlight provided by an embodiment of the present invention;

[0032] Figure 10 Schematic flow diagram of yet another guiding design method for a car headlight provided by an embodiment of the present invention;

[0033] Figure 11 Schematic structure diagram of a guiding design device for a car headlight provided by an embodiment of the present invention;

[0034] Figure 12 Schematic structure diagram of a terminal device provided by an embodiment of the present invention. Detailed implementation manners

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0036] Figure 1 Schematic plan structure diagram of a car headlight provided by an embodiment of the present invention, Figure 2 is Figure 1 Schematic cross-sectional structure diagram of the front car headlight shown in the direction of AA'; Figure 3 is Figure 1 Schematic cross-sectional structure diagram of the front car headlight shown in the direction of BB'; Figure 4 isFigure 2 Schematic diagram of the annotation of the total reflection surface in the cross-sectional structure shown, such as Figures 1-4 shown, the automotive headlamp includes a light guide structure 10 and a lamp housing structure 20. The light guide structure 10 includes a main body section and a tail section. The lamp housing structure 20 includes a transparent part 21 and a non-transparent part 22 that are fixedly connected. The light-emitting surface of the main body section and the light-emitting surface of the tail section face different positions of the transparent part 21. The light emitted from the light-emitting surface of the tail section is incident on the grille flange structure 31 through the corresponding transparent part 21, and at least one total reflection occurs between the surface of the light-emitting surface of the tail section close to the grille flange structure 31 and the surface of the grille flange structure 31 close to the non-transparent part 22; Figure 5 is a schematic flow diagram of a guiding design method for an automotive headlamp provided by an embodiment of the present invention. The guiding design method for the automotive headlamp is applicable to the production design stage of the automotive headlamp. The guiding design method for the automotive headlamp can be executed by a guiding design device for the automotive headlamp. The guiding design device can be implemented in the form of hardware and / or software. The measuring device of the guiding design device can be configured in a control board. Such as Figure 5 shown, the guiding design method includes:

[0037] S110. Obtain the shape parameters and relative position relationships of the light guide structure, the lamp housing structure, the grille flange structure, and the grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flange structure and the grille main body structure are integrated.

[0038] First, a detailed introduction is made to the Figures 1-4 automotive headlamp shown, Figure 1 The automotive headlamp shown includes a daytime running lamp / position lamp 01 and a turn signal lamp 02. Of course, the automotive headlamp may also include the structures and quantities of other lamps. This embodiment is only an example here and is not limited. Taking the Figure 1 cross-sectional structure of the daytime running lamp / position lamp 01 shown as an example for illustration, that is, Figure 2 and Figure 3 shown, the automotive headlamp includes a light guide structure 10 and a lamp housing structure 20. Among them, the light guide structure 10 includes a main body section and a tail section. The light emitted by the LED enters the main body section and propagates along the main body section towards the tail section. A part of the light is emitted from the light-emitting surface of the main body section to the outside of the lamp housing structure 20, and another part of the light is emitted from the light-emitting surface of the tail section to the surface of the lamp housing structure 20 and gathers. This part of the light will cause an obvious super bright spot at the end of the light guide structure 10. Therefore, this embodiment processes this part of the light to prevent the user from seeing an obvious super bright spot. Figure 2 The light guide structure 10 shown can be understood as a part of the overall light guide structure 10. Exemplarily, Figure 2The shown optical waveguide structure 10 can be understood as the tail section of the overall optical waveguide structure 10. Additionally, by way of example, the automotive headlamp further includes an optical waveguide bracket 40, which can function to fix the optical waveguide structure 10. The lamp cover structure 20 includes a transparent portion 21 and a non-transparent portion 22 that are fixedly connected. The light-emitting surface of the main body section and the light-emitting surface of the tail section face different positions of the transparent portion 21 respectively. The position of the transparent portion 21 corresponding to the light-emitting surface of the main body section can be conducive to the light exiting to the outside of the lamp cover structure 20, and the position of the transparent portion 21 corresponding to the light-emitting surface of the tail section can be conducive to processing the light at the end of the optical waveguide structure 10, avoiding the aggregation of this part of the light on the surface of the lamp cover structure 20. It can be understood that the lamp cover structure 20 here can also be understood as an outer lamp cover. The automotive headlamp further includes an inner lamp cover 23, and both can play a protective role for the optical waveguide structure 10 to ensure that the optical waveguide structure 10 can emit light normally for illumination and the like.

[0039] The focus of this embodiment lies in the processing of the light emitted from the light-emitting surface of the tail section. The light emitted from the light-emitting surface of the tail section is incident on the grille flange structure 31 through the corresponding transparent portion 21, and at least one total internal reflection occurs between the surface of the non-transparent portion 22 close to the grille flange structure 31 and the surface of the grille flange structure 31 close to the non-transparent portion 22. That is, in this embodiment, the existing grille flange structure 31 is used to scatter the light emitted from the light-emitting surface of the tail section, changing the propagation direction of this part of the light and avoiding the aggregation of this part of the light on the surface of the lamp cover structure 20, thereby avoiding the user from observing obvious super bright light spots. It can be understood that the grille flange structure 31 and the grille main body structure 32 are integrated here. The grille flange structure 31 and the grille main body structure 32 can be understood as the front grille or grille lamp, and they only differ in the position arrangement. And, Figure 4 In the sectional structure, the total internal reflection surfaces are marked in the form of a dotted line box. Among them, the surface of the non-transparent portion 22 close to the grille flange structure 31 is the total internal reflection surface, the surface of the grille flange structure 31 close to the non-transparent portion 22 is the total internal reflection surface, the surface of the grille main body structure 32 close to the optical waveguide structure 10 is the total internal reflection surface, and at least part of the area of the surface of the grille main body structure 32 close to the grille flange structure 31 is also the total internal reflection surface. In this way, when the light emitted from the light-emitting surface of the tail section is incident on these total internal reflection surfaces, total internal reflection can occur correspondingly, thereby changing the propagation path of the light.

[0040] Specifically, continue to refer to Figures 1-4, in essence, this embodiment utilizes surface replacement, point replacement, and line replacement methods to perform software simulation on the actually prepared light guide structure 10, lamp cover structure 20, grille flanging structure 31, and grille main body structure 32. In the software, a three-dimensional virtual simulation model is constructed according to a 1:1 ratio or other ratios to simulate the propagation path of the light rays at the end of the light guide structure 10; alternatively, in this embodiment, according to the data of the light guide structure 10, lamp cover structure 20, grille flanging structure 31, and grille main body structure 32 in the three-dimensional virtual simulation model, when it is determined that the propagation path of the light rays at the end of the light guide structure 10 is as required, the light guide structure 10, lamp cover structure 20, grille flanging structure 31, and grille main body structure 32 are prepared correspondingly. In this way, by obtaining the shape parameters and relative position relationships of the light guide structure 10, lamp cover structure 20, grille flanging structure 31, and grille main body structure 32, a corresponding three-dimensional virtual simulation model can be constructed. Exemplarily, the size of the light guide structure 10 in the three-dimensional virtual simulation model is the same as or in a certain proportion to the size of the actually prepared light guide structure 10. Exemplarily, the relative position relationship between the lamp cover structure 20 and the grille flanging structure 31 in the three-dimensional virtual simulation model is the same as or in a certain proportion to the relative position relationship between the actually prepared lamp cover structure 20 and the grille flanging structure 31. Subsequently, analysis can be performed based on the simulation data in the three-dimensional virtual simulation model, without the need to analyze the actually prepared automotive headlamp, which can reduce the preparation cost and avoid material waste.

[0041] S120. Based on the total internal reflection theorem, simulate the propagation path information of all the total internal reflection light rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model.

[0042] Specifically, the light rays emitted from the light-emitting surface at the tail section undergo at least one total internal reflection between the surface of the non-transparent part 22 close to the grille flanging structure 31 and the surface of the grille flanging structure 31 close to the non-transparent part 22. Figure 6 is Figure 2 a schematic diagram of an optical path of the propagation path of the total internal reflection light rays in the cross-sectional structure shown, as Figure 4 and Figure 6 shown, based on the total internal reflection theorem, in the three-dimensional virtual simulation model, it is possible to simulate the multiple total internal reflections that occur between the light rays emitted from the light-emitting surface at the tail section between the surface of the non-transparent part 22 close to the grille flanging structure 31 and the surface of the grille flanging structure 31 close to the non-transparent part 22, that is, the propagation path information of the multiple total internal reflection light rays formed. And, Figure 7 is Figure 2 another schematic diagram of an optical path of the propagation path of the total internal reflection light rays in the cross-sectional structure shown, as Figure 4 and Figure 7As shown, based on the total reflection theorem, the total reflection that occurs between the surface of the non-transparent part 22 near the grille flanging structure 31 and the surface of the grille flanging structure 31 near the non-transparent part 22 for the light rays emitted from the light-emitting surface of the tail section can be simulated in the three-dimensional virtual simulation model, that is, the propagation path information of a total reflection light ray is formed. Exemplarily, the propagation path information of the total reflection light ray may include the propagation direction of the total reflection light ray, the coordinates of the head end on the propagation path of the total reflection light ray, the coordinates of the tail end on the propagation path of the total reflection light ray, the length of the propagation path of the total reflection light ray, the sorting of any total reflection light ray among all the total reflection light rays, etc. Comparing Figure 6 and Figure 7 , it can be clearly seen that the light rays emitted from the light-emitting surface of the tail section need to undergo at least one total reflection between the non-transparent part 22 and the grille flanging structure 31. There are two possibilities for the final emission result of the total reflection light ray. As Figure 6 shown, it enters the interior of the vehicle body, and this part of the light rays cannot be seen by the user. Or, as Figure 7 shown, it exits the interior of the vehicle body, and this part of the light rays can be seen by the user. Therefore, the purpose of this embodiment is to reasonably adjust the shape parameters of at least one of the light guide structure 10, the lamp cover structure 20, the grille flanging structure 31, and the grille main body structure 32 and / or the relative position relationship between at least two of them, so that more of the light rays emitted from the light-emitting surface of the tail section enter the interior of the vehicle body, reducing or even avoiding this part of the light rays from exiting the interior of the vehicle body. In this way, the situation of forming an obvious super bright spot at the end of the light guide structure 10 is further avoided.

[0043] S130. Determine the last total reflection light ray according to the propagation path information of all the total reflection light rays.

[0044] Specifically, continuing to refer to Figure 6 and Figure 7 , in the propagation path information of all the total reflection light rays, it is possible to judge whether the light rays emitted from the light-emitting surface of the tail section finally enter the interior of the vehicle body or exit the interior of the vehicle body, and then judge whether an obvious super bright spot will be formed at the end of the light guide structure 10 according to the propagation path information corresponding to the last total reflection light ray. Among them, the last total reflection light ray can be understood as the last total reflection light ray along the propagation order of all the light rays.

[0045] When there is at least one point on the propagation path of the last total reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, adjust the shape parameters of at least one of the light guide structure, the lamp shade structure, the grille flange structure and the grille main body structure and / or the relative position relationship between at least two of them until the value of the coordinate of any point on the propagation path of the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure in the first direction; wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle.

[0046] Wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle. It can be understood that if the value of the coordinate of a point in the first direction is larger, the closer it is to the rear of the vehicle; if the value of the coordinate of a point in the first direction is smaller, the closer it is to the front of the vehicle. Also, the target point on the grille main body structure 32 can be selected according to actual needs. Exemplarily, the target point on the grille main body structure 32 can be a point on the grille main body structure 32 that is closest to the front of the vehicle. Thus, if the value of the coordinate of a point in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure 32 in the first direction, it means it is closer to the front of the vehicle; if the value of the coordinate of a point in the first direction is greater than the value of the coordinate of the target point on the grille main body structure 32 in the first direction, it means it is closer to the rear of the vehicle. Specifically, continue to refer to Figure 6 and Figure 7 , after determining the last total reflection light ray, the value of the coordinate of at least one point on the propagation path of the last total reflection light ray in the first direction can be compared with the value of the coordinate of the target point on the grille main body structure 32 in the first direction to determine whether the light emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body or exits the interior of the vehicle body, and then determine whether an obvious super bright spot will be formed at the end of the light guide structure 10.

[0047] In a specific embodiment, when there is at least one point on the propagation path of the last total reflection light ray whose value in the first direction is greater than the value of the coordinate of the target point on the grille main body structure 32 in the first direction, it is optional that the value of the coordinate of the tail end on the propagation path of the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure 32 in the first direction, that is, the coordinate of the tail end on the propagation path of the last total reflection light ray is closer to the rear of the vehicle than the coordinate of the target point on the grille main body structure 32. At this time, it means that the light emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body. For reference, see Figure 6As shown, a prompt of "OK" can be output accordingly to inform the relevant staff that the shape parameters and relative position relationships of the relevant light guide structure 10, lamp cover structure 20, grille flanging structure 31 and grille main body structure 32 are reasonable and can be applied to the actual preparation and production process. In another specific embodiment, when there is at least one point on the propagation path corresponding to the last total reflection ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure 32 in the first direction, and optionally when the value of the coordinate of the end of the propagation path corresponding to the last total reflection ray in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure 32 in the first direction, that is, the coordinate of the end of the propagation path corresponding to the last total reflection ray is closer to the front of the vehicle than the coordinate of the target point on the grille main body structure 32. At this time, it means that the light emitted from the light emitting surface at the tail section finally exits the interior of the vehicle body. For reference, see Figure 7 As shown, a prompt of "NG" can be output accordingly to inform the relevant staff that the shape parameters and relative position relationships of the relevant light guide structure 10, lamp cover structure 20, grille flanging structure 31 and grille main body structure 32 are unreasonable and need to be improved in design and cannot be directly applied to the actual preparation and production process. Otherwise, users may observe an obvious super bright spot at the end of the light guide structure 10. At this time, the shape parameters of at least one of the light guide structure 10, lamp cover structure 20, grille flanging structure 31 and grille main body structure 32 and / or the relative position relationships of at least two corresponding thereto can be adjusted until it is determined that the light emitted from the light emitting surface at the tail section finally enters the interior of the vehicle body, and then it can be applied to the actual preparation and production process. Thus, the key point of this embodiment lies in the method of structural ray calculation and the determination algorithm for the super bright problem at the end of the light guide structure 10. This guiding design method can quickly calculate the result of the finally emitted light, guide the design to improve the parameters, and achieve the effect that the emitted light enters the vehicle body.

[0048] In the technical solution of the embodiment of the present invention, by simulating the propagation path information of at least one total reflection ray corresponding to the light rays emitted from the light-emitting surface at the tail section in the three-dimensional virtual simulation model, and according to the comparison result of the coordinate information on the propagation path corresponding to the last total reflection ray and the coordinate information of the target point on the grille main body structure, the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main body structure and / or the relative position relationship of at least two corresponding ones are feedback-adjusted, so as to achieve efficient processing of the light rays at the end of the light guide structure, diverge the light rays at the end of the light guide structure, thereby reducing the brightness difference when observed from a certain direction, avoiding the situation of obvious super bright spots at the end of the light guide structure, improving the visual experience of users, being beneficial to improving the lighting effect of the automotive headlamp, making the brightness of the automotive headlamp more uniform, providing guiding design significance for the structural design of the automotive headlamp, enabling the designed automotive headlamp structure to have the ability to solve the obvious super bright spots at the end of the light guide structure, and thus being applicable to more vehicle models.

[0049] In a specific embodiment, optionally, when the value of the coordinate of at least one point on the propagation path corresponding to the last total reflection ray in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main body structure and / or the relative position relationship of at least two corresponding ones are adjusted until the value of the coordinate of any point on the propagation path corresponding to the last total reflection ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure in the first direction, including: when the value of the coordinate of the tail end on the propagation path corresponding to the last total reflection ray in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main body structure and / or the relative position relationship of at least two corresponding ones are adjusted until the values of the coordinates of the head end and the tail end on the propagation path corresponding to the last total reflection ray are both greater than the value of the coordinate of the target point on the grille main body structure in the first direction.

[0050] Specifically, continue to refer to Figure 6 and Figure 7, since there are many coordinate points on the propagation path corresponding to the last total reflection ray, in order to simplify the comparison content and reduce the comparison process, here we can only obtain the value of the coordinate of the head end of the propagation path corresponding to the last total reflection ray in the first direction and the value of the coordinate of the tail end of the propagation path corresponding to the last total reflection ray in the first direction, and compare them with the value of the coordinate of the target point on the grille main body structure 32 in the first direction respectively, so as to determine whether the ray emitted from the light-emitting surface at the tail section finally enters the interior of the vehicle body or exits the interior of the vehicle body, and then judge whether an obvious super bright spot will be formed at the end of the light guide structure 10. When the value of the coordinate of the tail end of the propagation path corresponding to the last total reflection ray in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure 32 in the first direction, that is, the coordinate of the tail end of the propagation path corresponding to the last total reflection ray is closer to the head direction of the vehicle than the coordinate of the target point on the grille main body structure 32. At this time, it means that the ray emitted from the light-emitting surface at the tail section finally exits the interior of the vehicle body. For reference, see Figure 7 as shown, a prompt of "NG" can be output accordingly to inform the relevant staff that the shape parameters and relative position relationships of the relevant light guide structure 10, lamp housing structure 20, grille flanging structure 31 and grille main body structure 32 are unreasonable and need to be improved in design and cannot be directly applied to the actual preparation and production process. Otherwise, the user may observe the obvious super bright spot at the end of the light guide structure 10. At this time, the shape parameters of at least one of the light guide structure 10, lamp housing structure 20, grille flanging structure 31 and grille main body structure 32 and / or the relative position relationships of at least two corresponding thereto can be adjusted until it is determined that the ray emitted from the light-emitting surface at the tail section finally enters the interior of the vehicle body, and then it can be applied to the actual preparation and production process. That is, during the process of adjusting the shape parameters of at least one of the light guide structure 10, lamp housing structure 20, grille flanging structure 31 and grille main body structure 32 and / or the relative position relationships of at least two corresponding thereto, the comparison result of the value of the coordinate of the tail end of the propagation path corresponding to the last total reflection ray in the first direction and the value of the coordinate of the target point on the grille main body structure 32 in the first direction can be obtained in real time until the coordinates of the head end and the tail end of the propagation path corresponding to the last total reflection ray are both greater than the value of the coordinate of the target point on the grille main body structure 32 in the first direction. At this time, it means that the ray emitted from the light-emitting surface at the tail section finally enters the interior of the vehicle body.

[0051] In another specific embodiment, since the propagation path corresponding to the last total reflection light ray may be infinitely long, the coordinates of the end point on the propagation path corresponding to the last total reflection light ray can also be understood as the coordinates of the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray. That is, it is also possible to obtain the value of the coordinate of the starting point on the propagation path corresponding to the last total reflection light ray in the first direction and the value of the coordinate of the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray in the first direction, and compare them with the value of the coordinate of the target point on the grille main body structure 32 in the first direction respectively, so as to determine whether the light ray emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body or exits the interior of the vehicle body, and then determine whether an obvious super bright spot will be formed at the end of the light guide structure 10. When the value of the coordinate of the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure 32 in the first direction, that is, the coordinate of the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray is closer to the front of the vehicle than the coordinate of the target point on the grille main body structure 32. At this time, it means that the light ray emitted from the light-emitting surface of the tail section finally exits the interior of the vehicle body. Refer to Figure 7 As shown, a prompt of "NG" can be output accordingly to inform the relevant staff that the shape parameters and relative position relationships of the relevant light guide structure 10, lamp cover structure 20, grille flange structure 31 and grille main body structure 32 are unreasonable and need to be improved in design, and cannot be directly applied to the actual preparation and production process. Otherwise, the user may observe an obvious super bright spot at the end of the light guide structure 10. At this time, the shape parameters of at least one of the light guide structure 10, lamp cover structure 20, grille flange structure 31 and grille main body structure 32 and / or the relative position relationships of at least two of them can be adjusted until it is determined that the light ray emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body, and then it can be applied to the actual preparation and production process. That is, during the process of adjusting the shape parameters of at least one of the light guide structure 10, lamp cover structure 20, grille flange structure 31 and grille main body structure 32 and / or the relative position relationships of at least two of them, the comparison result of the value of the coordinate of the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray in the first direction and the value of the coordinate of the target point on the grille main body structure 32 in the first direction can be obtained in real time until the coordinates of the starting point and the point corresponding to the preset length threshold on the propagation path corresponding to the last total reflection light ray are both greater than the value of the coordinate of the target point on the grille main body structure 32 in the first direction. At this time, it means that the light ray emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body.

[0052] In addition, optionally, based on the total internal reflection theorem, after simulating the propagation path information of all the total internal reflection rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model, it further includes: when the number of the propagation path information of the total internal reflection rays is greater than a preset number threshold, outputting a prompt that the number is too large to be calculated.

[0053] Specifically, in the process of actually simulating the propagation path information of all the total internal reflection rays in the three-dimensional virtual simulation model in this embodiment, the number of the propagation path information of the total internal reflection rays is also cumulatively counted in sequence. When the number of the propagation path information of the total internal reflection rays is less than or equal to the preset number threshold, it indicates that the software of the three-dimensional virtual simulation model can run normally and has a certain simulation accuracy. At this time, subsequent steps such as determining the last total internal reflection ray can be carried out. When the number of the propagation path information of the total internal reflection rays is greater than the preset number threshold, it indicates that the software operation of the three-dimensional virtual simulation model exceeds the load and the corresponding simulation accuracy decreases. At this time, a prompt that the number is too large to be calculated can be output to timely remind relevant staff. Exemplarily, the preset number threshold can be set according to actual needs. Exemplarily, the preset number threshold can be 100.

[0054] Figure 8 It is a schematic flowchart of another guiding design method for an automotive headlamp provided by an embodiment of the present invention. This embodiment is optimized on the basis of the above embodiment. Optionally, determining the last total internal reflection ray according to the propagation path information of all the total internal reflection rays includes:

[0055] According to the propagation path information of all the total internal reflection rays, sequentially determining the length of the propagation path corresponding to each total internal reflection ray;

[0056] Determining the total internal reflection ray corresponding to the propagation path with a length greater than the preset length threshold as the last total internal reflection ray.

[0057] For the content not detailed in this embodiment, please refer to the above embodiment. As Figure 8 shown, the guiding design method includes:

[0058] S210. Obtaining the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure and the grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flanging structure and the grille main body structure are integrated.

[0059] S220. Based on the total internal reflection theorem, simulating the propagation path information of all the total internal reflection rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model.

[0060] S230. Determine the lengths of the propagation paths corresponding to each total reflection ray in sequence according to the propagation path information of all the total reflection rays.

[0061] Optionally, determining the lengths of the propagation paths corresponding to each total reflection ray in sequence according to the propagation path information of all the total reflection rays includes: determining the coordinates of the head end and the tail end on the propagation path corresponding to the total reflection ray according to the propagation path information corresponding to the total reflection ray; according to the calculation formula determine the length L of the propagation path corresponding to the total reflection ray; wherein, the coordinates of the head end on the propagation path corresponding to the total reflection ray are (a1, b1, c1), and the coordinates of the tail end on the propagation path corresponding to the total reflection ray are (a2, b2, c2).

[0062] Specifically, for any total reflection ray, the intersection point of one end of the total reflection ray and the grid flanging structure, the intersection point of the other end of the total reflection ray and the non-transparent part, and the propagation direction of the total reflection ray between the grid flanging structure and the non-transparent part can be determined according to the propagation path information corresponding to it. Exemplarily, if the propagation direction of the total reflection ray between the grid flanging structure and the non-transparent part is from the grid flanging structure towards the non-transparent part, the intersection point of one end of the total reflection ray and the grid flanging structure can be determined as the coordinates of the head end on the propagation path corresponding to the total reflection ray, and the intersection point of one end of the total reflection ray and the non-transparent part can be determined as the coordinates of the tail end on the propagation path corresponding to the total reflection ray. Exemplarily, if the propagation direction of the total reflection ray between the grid flanging structure and the non-transparent part is from the non-transparent part towards the grid flanging structure, the intersection point of one end of the total reflection ray and the non-transparent part can be determined as the coordinates of the head end on the propagation path corresponding to the total reflection ray, and the intersection point of one end of the total reflection ray and the grid flanging structure can be determined as the coordinates of the tail end on the propagation path corresponding to the total reflection ray.

[0063] Furthermore, after determining the coordinates (a1, b1, c1) of the head end and the coordinates (a2, b2, c2) of the tail end on the propagation path corresponding to the total reflection ray, the length L of the propagation path corresponding to the total reflection ray can be determined according to the coordinates (a1, b1, c1) of the head end and the coordinates (a2, b2, c2) of the tail end on the propagation path corresponding to the total reflection ray. Optionally, the length L of the propagation path corresponding to the total reflection ray can be determined according to the following calculation formula Determine the length L of the propagation path corresponding to the total reflection ray. In addition, if the coordinates of the head end and the tail end on the propagation path corresponding to the total reflection ray cannot be accurately determined, the length L of the propagation path corresponding to the total reflection ray can also be roughly determined according to the coordinates of any two points on the propagation path corresponding to the total reflection ray.

[0064] S240. Determine the last total reflection ray corresponding to the propagation path with a length greater than the preset length threshold.

[0065] It can be understood that since the propagation path corresponding to the last total reflection ray may scatter to an area outside the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part, the propagation path corresponding to the last total reflection ray is relatively long. Generally speaking, the length of the propagation path corresponding to the last total reflection ray is the maximum among the lengths of the propagation paths corresponding to all total reflection rays. Specifically, the lengths of the propagation paths corresponding to all total reflection rays can be compared in size, and the total reflection ray corresponding to the propagation path with a length greater than the preset length threshold is determined as the last total reflection ray, so as to subsequently judge whether the light emitted from the light-emitting surface of the tail section finally enters or exits the vehicle body according to the propagation path information of the last total reflection ray. Exemplarily, the preset length threshold can be set according to actual needs. Exemplarily, the preset length threshold can be 10 m.

[0066] S250. When there is at least one point on the propagation path corresponding to the last total reflection ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main structure in the first direction, adjust at least one of the shape parameters of the light guide structure, the lamp cover structure, the grille flanging structure and the grille main structure and / or the relative position relationship between at least two of them until the value of the coordinate of any point on the propagation path corresponding to the last total reflection ray in the first direction is greater than the value of the coordinate of the target point on the grille main structure in the first direction; wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle.

[0067] Figure 9 It is a schematic flowchart of another guiding design method for an automotive headlamp provided by an embodiment of the present invention. This embodiment is optimized on the basis of the above embodiment. Optionally, based on the total reflection theorem, the propagation path information of all total reflection rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part is simulated in a three-dimensional virtual simulation model, including:

[0068] Obtain the coordinates of the light-emitting point corresponding to the light-emitting surface of the tail section and the light-emitting direction; wherein, the light-emitting direction corresponding to the light-emitting surface of the tail section is perpendicular to the light-emitting surface of the tail section;

[0069] According to the coordinates of the light-emitting point corresponding to the light-emitting surface of the tail section and the light-emitting direction, determine the intersection coordinates of the light emitted from the light-emitting surface of the tail section and the grille flanging structure, and the incident angle of the light emitted from the light-emitting surface of the tail section incident on the grille flanging structure;

[0070] Based on the total internal reflection theorem, in the three-dimensional virtual simulation model, the intersection coordinates of the light rays emitted from the light-emitting surface of the tail section and the grille flanging structure are used as the coordinates of the head end on the propagation path of the first total internal reflection light ray, and according to the incident angle of the light rays emitted from the light-emitting surface of the tail section onto the grille flanging structure, the reflection angle of the first total internal reflection light ray exiting the grille flanging structure is determined;

[0071] According to the intersection coordinates of the current total internal reflection light ray with the grille flanging structure and / or the non-transparent part, and the incident angle of the current total internal reflection light ray onto the grille flanging structure or the non-transparent part, the propagation path information corresponding to the next total internal reflection light ray is determined.

[0072] For the content not detailed in this embodiment, please refer to the above embodiments. As Figure 9 shown, the guiding design method includes:

[0073] S310. Obtain the shape parameters and relative position relationships of the light guide structure, the lamp shade structure, the grille flanging structure, and the grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flanging structure and the grille main body structure are integrated.

[0074] S320. Obtain the coordinates of the light ray exit point corresponding to the light-emitting surface of the tail section and the light ray exit direction; wherein, the light ray exit direction corresponding to the light-emitting surface of the tail section is perpendicular to the light-emitting surface of the tail section.

[0075] Specifically, after the three-dimensional virtual simulation model is constructed, it is also necessary to obtain the coordinates of the light ray exit point corresponding to the light-emitting surface of the tail section and the exit direction of the light rays corresponding to the light-emitting surface of the tail section, so as to subsequently determine the propagation path information of the subsequent total internal reflection light rays based on the total internal reflection theorem. Exemplarily, the propagation path information of the total internal reflection light rays may include the propagation direction of the total internal reflection light rays, the coordinates of the head end on the propagation path of the total internal reflection light rays, the coordinates of the tail end on the propagation path of the total internal reflection light rays, the length of the propagation path of the total internal reflection light rays, the sorting of any total internal reflection light ray among all the total internal reflection light rays, etc.

[0076] S330. According to the coordinates of the light ray exit point corresponding to the light-emitting surface of the tail section and the light ray exit direction, determine the intersection coordinates of the light rays emitted from the light-emitting surface of the tail section and the grille flanging structure, and the incident angle of the light rays emitted from the light-emitting surface of the tail section onto the grille flanging structure.

[0077] Specifically, in this embodiment, it is essentially to determine the propagation path information of the light rays corresponding to the light-emitting surface of the tail section. The intersection coordinates of the light rays emitted from the light-emitting surface of the tail section and the grid flanging structure can be determined based on the coordinates of the light-emitting point corresponding to the light-emitting surface of the tail section and the light-emitting direction. And the angle between the light-emitting direction of the light rays corresponding to the light-emitting surface of the tail section and the normal direction of the grid flanging structure is the incident angle of the light rays emitted from the light-emitting surface of the tail section incident on the grid flanging structure, so as to subsequently determine the propagation path information of the first total reflection light rays according to the propagation path information of the light rays corresponding to the light-emitting surface of the tail section.

[0078] S340. Based on the total reflection theorem, in the three-dimensional virtual simulation model, the intersection coordinates of the light rays emitted from the light-emitting surface of the tail section and the grid flanging structure are used as the coordinates of the first end of the propagation path of the first total reflection light rays, and according to the incident angle of the light rays emitted from the light-emitting surface of the tail section incident on the grid flanging structure, the reflection angle of the first total reflection light rays emitted from the grid flanging structure is determined.

[0079] Specifically, in this embodiment, it is essentially to determine the propagation path information of the first total reflection light rays according to the propagation path information of the light rays corresponding to the light-emitting surface of the tail section. Based on the total reflection theorem, between the surface of the non-transparent part close to the grid flanging structure and the surface of the grid flanging structure close to the non-transparent part, for any total reflection light ray, the reflection angle remains unchanged each time, and the incident angle is equal to the reflection angle. Since the light rays corresponding to the light-emitting surface of the tail section will be incident on the grid flanging structure, the intersection coordinates of the light rays emitted from the light-emitting surface of the tail section and the grid flanging structure can be used as the coordinates of the first end of the propagation path of the first total reflection light rays, and the incident angle of the light rays emitted from the light-emitting surface of the tail section incident on the grid flanging structure is equal to the reflection angle of the first total reflection light rays emitted from the grid flanging structure.

[0080] S350. According to the intersection coordinates of the current total reflection light rays and the grid flanging structure and / or the non-transparent part, and the incident angle of the current total reflection light rays incident on the grid flanging structure or the non-transparent part, determine the propagation path information corresponding to the next total reflection light rays.

[0081] Optionally, based on the intersection coordinates of the current total reflection ray with the grille flanging structure and / or the non-transparent part, and the incident angle of the current total reflection ray incident on the grille flanging structure or the non-transparent part, determine the propagation path information corresponding to the next total reflection ray, including: Based on the total reflection theorem, in the three-dimensional virtual simulation model, use the intersection coordinates of the current total reflection ray with the non-transparent part as the coordinates of the starting end on the propagation path of the next total reflection ray, and determine the reflection angle at which the next total reflection ray exits the non-transparent part according to the incident angle of the current total reflection ray incident on the non-transparent part; and / or, based on the total reflection theorem, in the three-dimensional virtual simulation model, use the intersection coordinates of the current total reflection ray with the grille flanging structure as the coordinates of the starting end on the propagation path of the next total reflection ray, and determine the reflection angle at which the next total reflection ray exits the grille flanging structure according to the incident angle of the current total reflection ray incident on the grille flanging structure.

[0082] Specifically, in essence, this embodiment determines the propagation path information of the next total reflection ray based on the propagation path information of the current total reflection ray. Based on the total reflection theorem, between the side surface of the non-transparent part close to the grille flanging structure and the side surface of the grille flanging structure close to the non-transparent part, for any total reflection ray, the reflection angle remains unchanged each time, and the incident angle is equal to the reflection angle. In a specific implementation manner, if the current total reflection ray is incident on the non-transparent part, the next total reflection ray may be incident on the grille flanging structure, then the intersection coordinates of the current total reflection ray with the non-transparent part can be used as the coordinates of the starting end on the propagation path of the next total reflection ray, and the incident angle of the current total reflection ray incident on the non-transparent part is equal to the reflection angle at which the next total reflection ray exits the non-transparent part. In another specific implementation manner, if the current total reflection ray is incident on the grille flanging structure, the next total reflection ray may be incident on the non-transparent part, then the intersection coordinates of the current total reflection ray with the grille flanging structure can be used as the coordinates of the starting end on the propagation path of the next total reflection ray, and the incident angle of the current total reflection ray incident on the grille flanging structure is equal to the reflection angle at which the next total reflection ray exits the grille flanging structure.

[0083] S360. Determine the last total reflection ray according to the propagation path information of all the total reflection rays.

[0084] S370. When there is at least one point on the propagation path corresponding to the last total reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main structure in the first direction, adjust the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flange structure and the grille main structure and / or the relative position relationship between at least two corresponding ones until the value of the coordinate of any point on the propagation path corresponding to the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main structure in the first direction; wherein, the first direction is parallel to the direction from the head of the vehicle to the tail of the vehicle.

[0085] Figure 10 is a schematic flow chart of another guiding design method for an automotive headlamp provided by an embodiment of the present invention, as Figure 10As shown, first, obtain the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure, and the grille main body structure, and obtain the coordinates of the light exit points corresponding to the light-emitting surface of the tail section and the light exit direction. In this way, by obtaining the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure, and the grille main body structure, a corresponding three-dimensional virtual simulation model can be constructed. Exemplarily, the size of the light guide structure in the three-dimensional virtual simulation model is the same as or in a certain proportion to the size of the actually prepared light guide structure. Exemplarily, the relative position relationship between the lamp cover structure and the grille flanging structure in the three-dimensional virtual simulation model is the same as or in a certain proportion to the relative position relationship between the actually prepared lamp cover structure and the grille flanging structure. After the three-dimensional virtual simulation model is constructed, it is also necessary to obtain the coordinates of the light exit points corresponding to the light-emitting surface of the tail section and the light exit direction of the light corresponding to the light-emitting surface of the tail section, so as to determine the propagation path information of the subsequent total reflection light based on the total reflection theorem. Exemplarily, the propagation path information of the total reflection light can include the propagation direction of the total reflection light, the coordinates of the head end on the propagation path of the total reflection light, the coordinates of the tail end on the propagation path of the total reflection light, the length of the propagation path of the total reflection light, the sorting of any total reflection light among all the total reflection lights, etc. Then, based on the total reflection theorem, simulate the propagation path information of all the total reflection lights between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model, and sequentially determine the lengths of the propagation paths corresponding to each total reflection light according to the propagation order of all the total reflection lights. During this process, it is necessary to accumulate the number of the propagation path information corresponding to the total reflection light and compare it with the preset number threshold. When the number of the propagation path information corresponding to the total reflection light is greater than the preset number threshold, it means that the software operation of the three-dimensional virtual simulation model exceeds the load and the corresponding simulation accuracy decreases. At this time, a prompt of "too many to calculate" can be output to timely remind the relevant staff. When the number of the propagation path information corresponding to the total reflection light is less than or equal to the preset number threshold, it means that the software of the three-dimensional virtual simulation model can run normally and has a certain simulation accuracy. At this time, the length of the propagation path corresponding to the total reflection light can be compared with the preset length threshold. When the length of the propagation path corresponding to the total reflection light is less than or equal to the preset length threshold, it means that this total reflection light is not the last total reflection light, and there may be other total reflection lights later, and then continue to accumulate and determine the length. When the length of the propagation path corresponding to the total reflection light is greater than the preset length threshold, then subsequently, it can be judged whether the light emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body or exits the interior of the vehicle body according to the propagation path information of this last total reflection light.Since the propagation path corresponding to the last total reflection ray may scatter to the area outside the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part, the length of the propagation path corresponding to the last total reflection ray is relatively long. The coordinates of the point corresponding to the preset length threshold on the propagation path corresponding to the total reflection ray can be determined as the coordinates of the end point on the propagation path corresponding to the total reflection ray. After that, the value of the coordinates of the end point on the propagation path corresponding to the last total reflection ray in the first direction can be compared with the value of the coordinates of the target point on the grille main body structure in the first direction to determine whether the light emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body or exits the interior of the vehicle body, thereby determining whether an obvious super bright spot will be formed at the end of the light guide structure. In a specific embodiment, when the value of the coordinates of the end point on the propagation path corresponding to the last total reflection ray in the first direction is greater than the value of the coordinates of the target point on the grille main body structure in the first direction, that is, the coordinates of the end point on the propagation path corresponding to the last total reflection ray are closer to the rear of the vehicle than the coordinates of the target point on the grille main body structure. At this time, it means that the light emitted from the light-emitting surface of the tail section finally enters the interior of the vehicle body for reference. Figure 6 As shown in the figure, a prompt of "OK" can be output accordingly. In another specific embodiment, when the value of the coordinates of the end point on the propagation path corresponding to the last total reflection ray in the first direction is less than or equal to the value of the coordinates of the target point on the grille main body structure in the first direction, that is, the coordinates of the end point on the propagation path corresponding to the last total reflection ray are closer to the front of the vehicle than the coordinates of the target point on the grille main body structure. At this time, it means that the light emitted from the light-emitting surface of the tail section finally exits the interior of the vehicle body for reference Figure 7 As shown in the figure, a prompt of "NG" can be output accordingly.

[0086] Figure 11 FIG. is a schematic structural diagram of a guiding design device for an automotive headlamp provided by an embodiment of the present invention. The guiding design device for the automotive headlamp is applicable to the production design stage of the automotive headlamp. Continuing to refer to Figures 1-4 , the automotive headlamp includes a light guide structure 10 and a lamp cover structure 20. The light guide structure 10 includes a main body section and a tail section. The lamp cover structure 20 includes a transparent part 21 and a non-transparent part 22 that are fixedly connected. The light-emitting surface of the main body section and the light-emitting surface of the tail section face different positions of the transparent part 21. The light emitted from the light-emitting surface of the tail section enters the grille flanging structure 31 through the corresponding transparent part 21, and the light emitted from the light-emitting surface of the tail section undergoes at least one total reflection between the surface of the non-transparent part 22 close to the grille flanging structure 31 and the surface of the grille flanging structure 31 close to the non-transparent part 22. The guiding design device can be implemented in the form of hardware and / or software and is generally configured in a control board. As Figure 11 shown, the guiding design device includes:

[0087] The model construction module 410 is configured to obtain the shape parameters and relative position relationships of the light guide structure, the lamp cover structure, the grille flanging structure, and the grille main body structure to construct a three-dimensional virtual simulation model; wherein, the grille flanging structure and the grille main body structure are integrated; the path simulation module 420 is configured to simulate the propagation path information of all total reflection light rays between the surface of the non-transparent part close to the grille flanging structure and the surface of the grille flanging structure close to the non-transparent part in the three-dimensional virtual simulation model based on the total reflection theorem; the last-bit determination module 430 is configured to determine the last total reflection light ray according to the propagation path information of all total reflection light rays; the data processing module 440 is configured to adjust the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flanging structure, and the grille main body structure and / or the relative position relationships of at least two corresponding thereto when there is at least one point on the propagation path corresponding to the last total reflection light ray whose value in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, until the value of the coordinate of any point on the propagation path corresponding to the last total reflection light ray in the first direction is greater than the value of the coordinate of the target point on the grille main body structure in the first direction; wherein, the first direction is parallel to the direction from the front of the vehicle to the rear of the vehicle.

[0088] In the technical solution of the embodiment of the present invention, by simulating the propagation path information of at least one total reflection light ray corresponding to the light rays emitted from the light-emitting surface at the tail section in the three-dimensional virtual simulation model, and according to the comparison result of the coordinate information on the propagation path corresponding to the last total reflection light ray and the coordinate information of the target point on the grille main body structure, feedback adjustment is made to the shape parameters of at least one of the light guide structure, the lamp cover structure, the grille flanging structure, and the grille main body structure and / or the relative position relationships of at least two corresponding thereto, so as to achieve efficient processing of the light rays at the end of the light guide structure, diverge the light rays at the end of the light guide structure, thereby reducing the brightness difference when observed from a certain direction, avoiding the situation of obvious super bright spots appearing at the end of the light guide structure, improving the user's visual experience, being beneficial to improving the lighting effect of the automotive headlamp, making the brightness of the automotive headlamp more uniform, providing guiding design significance for the structural design of the automotive headlamp, enabling the designed automotive headlamp structure to have the ability to solve the problem of obvious super bright spots at the end of the light guide structure, and thus being applicable to more vehicle models.

[0089] Based on the above technical solution, optionally, the last-bit determination module 430 may specifically include a length determination unit and a last-bit determination unit. The length determination unit is configured to sequentially determine the lengths of the propagation paths corresponding to each total reflection light ray according to the propagation path information of all total reflection light rays; the last-bit determination unit is configured to determine the total reflection light ray corresponding to the propagation path with a length greater than the preset length threshold as the last total reflection light ray.

[0090] Optionally, the length determination unit may specifically include a head and tail coordinate determination subunit and a length determination subunit; the head and tail coordinate determination subunit is configured to determine the coordinates of the head end and the tail end on the propagation path corresponding to the total reflection light according to the propagation path information corresponding to the total reflection light; the length determination subunit is configured to determine the length L of the propagation path corresponding to the total reflection light according to the calculation formula where the coordinates of the head end on the propagation path corresponding to the total reflection light are (a1, b1, c1), and the coordinates of the tail end on the propagation path corresponding to the total reflection light are (a2, b2, c2).

[0091] Optionally, the data processing module 440 may specifically include a data processing unit, and the data processing unit is configured to adjust the shape parameters of at least one of the light guide structure, the lamp shade structure, the grille flange structure and the grille main body structure and / or the relative position relationship between at least two of them when the value of the coordinate of the tail end on the propagation path corresponding to the last total reflection light in the first direction is less than or equal to the value of the coordinate of the target point on the grille main body structure in the first direction, until the coordinates of the head end and the tail end on the propagation path corresponding to the last total reflection light are both greater than the value of the coordinate of the target point on the grille main body structure in the first direction.

[0092] Optionally, the path simulation module 420 may specifically include a light emission information acquisition unit, a light emission information processing unit, a first position information determination unit and a subsequent information determination unit. The light emission information acquisition unit is configured to acquire the coordinates of the light emission point and the light emission direction corresponding to the light emitting surface of the tail section; wherein, the light emission direction corresponding to the light emitting surface of the tail section is perpendicular to the light emitting surface of the tail section; the light emission information processing unit is configured to determine the intersection coordinates of the light emitted from the light emitting surface of the tail section and the grille flange structure, and the incident angle of the light emitted from the light emitting surface of the tail section incident on the grille flange structure according to the coordinates of the light emission point and the light emission direction corresponding to the light emitting surface of the tail section; the first position information determination unit is configured to, based on the total reflection theorem, in the three-dimensional virtual simulation model, use the intersection coordinates of the light emitted from the light emitting surface of the tail section and the grille flange structure as the coordinates of the head end on the propagation path of the first total reflection light, and determine the reflection angle of the first total reflection light emitted from the grille flange structure according to the incident angle of the light emitted from the light emitting surface of the tail section incident on the grille flange structure; the subsequent information determination unit is configured to determine the propagation path information corresponding to the next total reflection light according to the intersection coordinates of the current total reflection light and the grille flange structure and / or the non-transparent part, and the incident angle of the current total reflection light incident on the grille flange structure or the non-transparent part.

[0093] Optionally, the subsequent information determination unit may specifically include a subsequent information determination subunit. The subsequent information determination subunit is configured to, based on the total reflection theorem, in the three-dimensional virtual simulation model, use the intersection coordinates of the current total reflection ray and the non-transparent part as the coordinates of the start end on the propagation path of the next total reflection ray, and determine the reflection angle at which the next total reflection ray exits the non-transparent part according to the incident angle of the current total reflection ray on the non-transparent part; and / or, based on the total reflection theorem, in the three-dimensional virtual simulation model, use the intersection coordinates of the current total reflection ray and the grille flanging structure as the coordinates of the start end on the propagation path of the next total reflection ray, and determine the reflection angle at which the next total reflection ray exits the grille flanging structure according to the incident angle of the current total reflection ray on the grille flanging structure.

[0094] Optionally, the guidance design module further includes a prompt output module. The prompt output module is configured to output a prompt that it is impossible to calculate due to excessive quantity when the quantity of the propagation path information of the total reflection ray is greater than a preset quantity threshold.

[0095] The guidance design device for the vehicle headlamp provided by the embodiment of the present invention can execute the guidance design method for the vehicle headlamp provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0096] Figure 12 It is a schematic structural diagram of a terminal device provided by an embodiment of the present invention. The terminal device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The terminal device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0097] Such as Figure 12As shown, the terminal device 100 includes one or more processors 110, and a storage device communicatively connected to the processors 110, such as a read-only memory (ROM) 120, a random access memory (RAM) 130, etc. Among them, the storage device stores computer programs executable by one or more processors. The processor 110 can execute various appropriate actions and processes according to the computer programs stored in the read-only memory (ROM) 120 or the computer programs loaded from the storage unit 180 into the random access memory (RAM) 130. In the RAM 130, various programs and data required for the operation of the terminal device 100 can also be stored. The processor 110, the ROM 120, and the RAM 130 are connected to each other via a bus 140. The input / output (I / O) interface 150 is also connected to the bus 140.

[0098] Multiple components in the terminal device 100 are connected to the I / O interface 150, including: an input unit 160, such as a keyboard, a mouse, etc.; an output unit 170, such as various types of displays, speakers, etc.; a storage unit 180, such as a disk, an optical disc, etc.; and a communication unit 190, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 190 allows the terminal device 100 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0099] The processor 110 can be various general and / or special processing components with processing and computing capabilities. Some examples of the processor 110 include but are not limited to a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 110 executes the various methods and processes described above, such as the guiding design method of automotive headlights.

[0100] In some embodiments, the guiding design method of automotive headlights can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as the storage unit 180. In some embodiments, part or all of the computer program can be loaded and / or installed onto the terminal device 100 via the ROM 120 and / or the communication unit 190. When the computer program is loaded into the RAM 130 and executed by the processor 110, one or more steps of the guiding design method of automotive headlights described above can be executed. Alternatively, in other embodiments, the processor 110 can be configured to execute the guiding design method of automotive headlights in any other appropriate way (e.g., by means of firmware).

[0101] The various embodiments of the systems and techniques described above in this specification can be implemented in digital electronic circuitry, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on a chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which may be a special-purpose or general-purpose programmable processor that receives data and instructions from, and transmits data and instructions to, a storage system, at least one input device, and at least one output device.

[0102] The computer program for implementing the methods of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions / operations specified in the flowchart and / or block diagram to be implemented. The computer program can be executed entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.

[0103] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0104] To provide interaction with a user, the systems and techniques described herein can be implemented on a terminal device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the terminal device. Other kinds of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, speech input, or tactile input).

[0105] The systems and techniques described herein can be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system can be interconnected to each other by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local area network (LAN), wide area network (WAN), blockchain network, and the Internet.

[0106] A computing system can include a client and a server. The client and the server are generally remote from each other and typically interact through a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, and solves the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0107] It should be understood that the various forms of processes shown above can be used, with steps reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein. Note that the above is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments, combinations with each other and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for guiding the design of automobile headlights, characterized in that: The automobile headlamp comprises a light guide structure and a lampshade structure, wherein the light guide structure comprises a main section and a tail section, and the lampshade structure comprises a transparent part and a non-transparent part that are fixedly connected, a light emitting surface of the main section and a light emitting surface of the tail section face different positions of the transparent part, light emitted from the light emitting surface of the tail section is incident toward a grille flange structure through the corresponding transparent part, and light emitted from the light emitting surface of the tail section is totally reflected at least once between a side surface of the non-transparent part close to the grille flange structure and a side surface of the grille flange structure close to the non-transparent part; The guided design approach includes: Obtaining shape parameters and relative positional relationships of the light guide structure, the lampshade structure, the grille flange structure and the grille main body structure to construct a three-dimensional virtual simulation model; wherein the grille flange structure and the grille main body structure are integrated; Based on the total reflection theorem, the propagation path information of all the totally reflected light rays between the side surface of the non-transparent part close to the grille flange structure and the side surface of the grille flange structure close to the non-transparent part is simulated in the three-dimensional virtual simulation model; Determining the last totally reflected light according to the propagation path information of all the totally reflected light; When there is at least one point on the propagation path corresponding to the last totally reflected light whose coordinates in the first direction have a value less than or equal to the value of the coordinates of the target point on the grille main body structure in the first direction, adjust the shape parameters of at least one of the light guide structure, the lampshade structure, the grille flange structure and the grille main body structure and / or the corresponding relative position relationship of at least two of them until the coordinates of any point on the propagation path corresponding to the last totally reflected light in the first direction have a value greater than the coordinates of the target point on the grille main body structure in the first direction; wherein the first direction is parallel to the direction from the front of the car to the rear of the car.

2. The guidance design method according to claim 1, characterized in that: Determining the last totally reflected light according to the propagation path information of all the totally reflected light comprises: According to the propagation path information of all the totally reflected light rays, determining in sequence the length of the propagation path corresponding to each of the totally reflected light rays; The totally reflected light corresponding to a propagation path whose length is greater than a preset length threshold is determined as the last totally reflected light.

3. The guidance design method according to claim 2, characterized in that: According to the propagation path information of all the totally reflected light rays, determining the length of the propagation path corresponding to each of the totally reflected light rays in sequence, including: Determine the coordinates of the head end and the tail end on the propagation path corresponding to the total reflection light according to the propagation path information corresponding to the total reflection light; According to the calculation formula Determine the length L of the propagation path corresponding to the total reflection light; wherein the coordinates of the beginning of the propagation path corresponding to the total reflection light are (a1, b1, c1), and the coordinates of the end of the propagation path corresponding to the total reflection light are (a2, b2, c2).

4. The guidance design method according to claim 1, characterized in that: When there is at least one point on the propagation path corresponding to the last totally reflected light whose coordinate value in the first direction is less than or equal to the coordinate value of the target point on the grille main body structure in the first direction, adjusting the shape parameters of at least one of the light guide structure, the lampshade structure, the grille flange structure and the grille main body structure and / or the relative position relationship of at least two of the corresponding ones, until the coordinate value of any point on the propagation path corresponding to the last totally reflected light in the first direction is greater than the coordinate value of the target point on the grille main body structure in the first direction, including: When the value of the coordinates of the tail end on the propagation path corresponding to the last totally reflected light in the first direction is less than or equal to the value of the coordinates of the target point on the grille main body structure in the first direction, adjust the shape parameters of at least one of the light guide structure, the lampshade structure, the grille flange structure and the grille main body structure and / or the corresponding relative position relationship of at least two of them until the coordinates of the head end and the coordinates of the tail end on the propagation path corresponding to the last totally reflected light are both greater than the value of the coordinates of the target point on the grille main body structure in the first direction.

5. The guidance design method according to claim 1, characterized in that: Based on the total reflection theorem, the propagation path information of all the total reflection light between the side surface of the non-transparent part close to the grille flange structure and the side surface of the grille flange structure close to the non-transparent part is simulated in the three-dimensional virtual simulation model, including: Obtaining the coordinates of the light emitting point and the light emitting direction corresponding to the light emitting surface of the tail segment; wherein the light emitting direction corresponding to the light emitting surface of the tail segment is perpendicular to the light emitting surface of the tail segment; According to the coordinates of the light emitting point corresponding to the light emitting surface of the tail section and the light emitting direction, determine the coordinates of the intersection of the light emitted from the light emitting surface of the tail section and the grille flange structure, and the incident angle of the light emitted from the light emitting surface of the tail section to the grille flange structure; Based on the total reflection theorem, in the three-dimensional virtual simulation model, the coordinates of the intersection of the light emitted from the light-emitting surface of the tail section and the grille flange structure are taken as the coordinates of the head end of the propagation path of the first total reflection light, and according to the incident angle of the light emitted from the light-emitting surface of the tail section incident on the grille flange structure, the reflection angle of the first total reflection light emitted from the grille flange structure is determined; According to the coordinates of the intersection of the current totally reflected light and the grille flange structure and / or the non-transparent part, and the incident angle of the current totally reflected light incident on the grille flange structure or the non-transparent part, the propagation path information corresponding to the next totally reflected light is determined.

6. The guidance design method according to claim 5, characterized in that: According to the coordinates of the intersection of the current total reflection light and the grille flange structure and / or the non-transparent portion, and the incident angle of the current total reflection light incident on the grille flange structure or the non-transparent portion, the propagation path information corresponding to the next total reflection light is determined, including: Based on the total reflection theorem, in the three-dimensional virtual simulation model, the coordinates of the intersection of the current total reflection light and the non-transparent part are used as the coordinates of the head end of the propagation path of the next total reflection light, and according to the incident angle of the current total reflection light incident on the non-transparent part, the reflection angle of the next total reflection light emitted from the non-transparent part is determined; And / or, based on the total reflection theorem, in the three-dimensional virtual simulation model, the coordinates of the intersection of the current total reflection light and the grille flange structure are used as the coordinates of the starting end of the propagation path of the next total reflection light, and according to the incident angle of the current total reflection light incident on the grille flange structure, the reflection angle of the next total reflection light emitted from the grille flange structure is determined.

7. The guidance design method according to claim 1, characterized in that: Based on the total reflection theorem, after simulating the propagation path information of all the total reflection light between the side surface of the non-transparent part close to the grille flange structure and the side surface of the grille flange structure close to the non-transparent part in the three-dimensional virtual simulation model, it also includes: When the amount of the propagation path information of the total reflected light is greater than a preset threshold, a prompt is outputted indicating that the amount is too large to be calculated.

8. A design guidance device for automobile headlights, characterized in that: The automobile headlamp comprises a light guide structure and a lampshade structure, wherein the light guide structure comprises a main section and a tail section, and the lampshade structure comprises a transparent part and a non-transparent part that are fixedly connected, a light emitting surface of the main section and a light emitting surface of the tail section face different positions of the transparent part, light emitted from the light emitting surface of the tail section is incident toward a grille flange structure through the corresponding transparent part, and light emitted from the light emitting surface of the tail section is totally reflected at least once between a side surface of the non-transparent part close to the grille flange structure and a side surface of the grille flange structure close to the non-transparent part; The guidance design device includes: A model building module, used to obtain shape parameters and relative positional relationships of the light guide structure, the lampshade structure, the grille flange structure and the grille main body structure, so as to build a three-dimensional virtual simulation model; wherein the grille flange structure and the grille main body structure are integrated; A path simulation module, for simulating, based on the total reflection theorem, in the three-dimensional virtual simulation model, the propagation path information of all the totally reflected light rays between a side surface of the non-transparent portion close to the grille flange structure and a side surface of the grille flange structure close to the non-transparent portion; A last position determination module, used to determine the last position of the totally reflected light according to the propagation path information of all the totally reflected light; A data processing module, used to adjust the shape parameters of at least one of the light guide structure, the lampshade structure, the grille flange structure and the grille main structure and / or the corresponding relative position relationship of at least two of them, when there is at least one point on the propagation path corresponding to the last totally reflected light whose coordinate value in the first direction is less than or equal to the coordinate value of the target point on the grille main structure in the first direction, until the coordinate value of any point on the propagation path corresponding to the last totally reflected light in the first direction is greater than the coordinate value of the target point on the grille main structure in the first direction; wherein the first direction is parallel to the direction from the front of the car to the rear of the car.

9. A terminal device, characterized in that: include: one or more processors; A storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the guiding design method for vehicle headlights as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for guiding the design of a vehicle headlight as described in any one of claims 1 to 7 is implemented.

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