Lens, projection module and vehicle

Abstract

The utility model discloses a lens, a projection module and a vehicle. The lens comprises an incident plane and an emergent plane. The incident surface is disposed so as to make incident light parallel. The emergent surface is configured to shape the parallel light into emergent light, and the emergent light is used for being projected on the projection surface to form a preset pattern. In the application, when the lens is applied to the projection module, the projection module can project the preset pattern only by one lens, so that the manufacturing cost of the projection module is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection technology, and more particularly, to a lens, a projection module and a vehicle. BACKGROUND

[0002] In the related art, there is a projection method for projecting a graphic representing the driving intention of a driver to the outside of a vehicle to ensure that more traffic participants can see the signal. However, since the projection module for projecting the graphic usually uses a lens group composed of multiple lenses to shape the light of the light source of the projection module to project the graphic, the manufacturing cost of the projection module is relatively high, and it is difficult to popularize the projection module. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a lens, a projection module and a vehicle.

[0004] The lens of the present application is configured to make incident light into parallel light. The exit surface is configured to shape the parallel light into exit light for projecting a preset graphic on a projection surface.

[0005] In some embodiments, the refractive index of the lens is greater than or equal to 1.584 and less than or equal to 1.586.

[0006] In some embodiments, the thickness of the lens is greater than or equal to 5 mm and less than or equal to 15 mm.

[0007] In some embodiments, the maximum aperture of the lens is greater than or equal to 15 mm and less than or equal to 20 mm in a direction perpendicular to the propagation direction of the parallel light.

[0008] In some embodiments, the exit surface is configured to make the exit light have a preset angle with the projection surface, and the preset angle is less than 90°.

[0009] In some embodiments, the preset angle is greater than or equal to 45° and less than or equal to 60°.

[0010] In some embodiments, the preset graphic has an outer contour, and the length of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm.

[0011] In some embodiments, the width of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm.

[0012] In some embodiments, the exit surface is configured to shape the parallel light to make the illumination ratio between the illumination of the preset graphic and the illumination of the environment at the projection surface greater than or equal to 10:1 and less than or equal to 100:1.

[0013] In some embodiments, the preset pattern is a turn signal pattern.

[0014] The projection module of the embodiments of the present application comprises a light source and the lens described above. The incident surface is configured to receive light emitted by the light source as the incident light.

[0015] In some embodiments, the light source is a Lambertian light source.

[0016] In some embodiments, the central wavelength of the light source is greater than or equal to 580 nm and less than or equal to 595 nm.

[0017] In some embodiments, the projection module comprises at least two lenses, and the projection module is used to project a plurality of preset patterns.

[0018] In some embodiments, the projection module further comprises a controller, and the light source comprises at least two light sources; the controller is configured to control the light source, so that the at least two light sources can be independently turned on under the control of the controller.

[0019] In some embodiments, the projection module is applied to a vehicle, and a left domain controller of the vehicle comprises the controller.

[0020] In some embodiments, the projection module further comprises a heat sink, and the heat sink is in heat-conducting connection with the light source.

[0021] In some embodiments, the projection module further comprises a mounting frame, and a mounting space is formed in the mounting frame; the mounting frame is provided with a light outlet in communication with the mounting space; the light source and the lens are mounted in the mounting space; and the exit light is projected out of the mounting frame through the light outlet.

[0022] The vehicle of the embodiments of the present application comprises the lens described above or the projection module described above.

[0023] In some embodiments, the lens is configured such that the minimum distance between the center of the preset pattern and the orthographic projection of the body of the vehicle onto the projection surface is greater than or equal to 350 mm and less than or equal to 500 mm.

[0024] In some embodiments, the projection module is arranged on a lamp of the vehicle.

[0025] In some embodiments, the projection module is arranged on the front bumper of the vehicle.

[0026] In some embodiments, the projection module is arranged on the rear bumper of the vehicle.

[0027] In some embodiments, the projection module is disposed on a welcome step of the vehicle.

[0028] In some embodiments, the projection module is disposed on an outside rearview mirror of the vehicle.

[0029] The incident surface of the lens of the present application can shape the incident light into parallel light, which propagates inside the lens; the parallel light contacts the exit surface of the lens, which can shape the parallel light into exit light, and the exit light can form a preset pattern on the projection surface. Therefore, when the lens of the present application is applied to the projection module, only one piece of lens is needed, which can first collimate the light of the light source of the projection module into parallel light through the incident surface, then shape the parallel light into exit light through the exit surface, and form a preset pattern on the projection surface. This makes the projection module only need one piece of lens to project a preset pattern, without the need for a lens group composed of multiple pieces of lens to project a preset pattern, thereby reducing the manufacturing cost of the projection module and facilitating the popularization of the projection module.

[0030] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0032] Figure 1 is a schematic diagram of a shaped light path of a first embodiment of the lens of the present application;

[0033] Figure 2 is a schematic diagram of a projection light path of the first embodiment of the lens of the present application;

[0034] Figure 3 is a schematic diagram of a projection light path of a second embodiment of the lens of the present application;

[0035] Figure 4 is a schematic diagram of a projection light path of a third embodiment of the lens of the present application;

[0036] Figure 5 is a structural block diagram of a projection module of some embodiments of the present application;

[0037] Figure 6 is Figure 5 a projection effect diagram of one light source and one lens of the projection module shown;

[0038] Figure 7 is Figure 5 a planar assembly schematic diagram of the projection module and the vehicle shown;

[0039] Figure 8 isFigure 5 The preset pattern projected by the projection module.

[0040] Explanation of main element symbols:

[0041] The projection module 1000;

[0042] The light source 10;

[0043] The lens 20; the incident surface 21; the exit surface 22;

[0044] The heat sink 30;

[0045] The mounting frame 40; the mounting space 41; the light exit 42;

[0046] The circuit board 50;

[0047] The incident light 61; the parallel light 62; the exit light 63; the projection surface 64;

[0048] The preset pattern 65, the first pattern 651, the second pattern 652, the third pattern 653;

[0049] The ground 67;

[0050] The front bumper 70 of the vehicle. DETAILED DESCRIPTION

[0051] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0053] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] The embodiments of the present application provide a vehicle, a projection module and a lens.

[0057] Please refer to Figure 1 and Figure 2 The lens 20 of the embodiments of the present application includes an incident surface 21 and an exit surface 22. The incident surface 21 is configured to make the incident light 61 into parallel light 62. The exit surface 22 is configured to shape the parallel light 62 into exit light 63, which is used to project a preset pattern 65 on a projection surface 64.

[0058] The incident surface 21 of the lens 20 of the embodiment of the present application can shape the incident light into parallel light 62 which propagates inside the lens; the parallel light 62 contacts the exit surface 22 of the lens 20, and is shaped by the exit surface 22 into exit light 63 which can form a preset pattern 65 on a projection surface 64. Therefore, when the lens 20 of the present application is applied to the projection module 1000, only one piece of lens 20 is needed to collimate the light of the light source 10 of the projection module 1000 into parallel light 62 first, shape the parallel light 62 into exit light 63 by the exit surface 22, and form a preset pattern 65 on the projection surface 64. This makes the projection module 1000 only need one piece of lens 20 to project the preset pattern 65, and does not need a lens group composed of multiple pieces of lens to project the preset pattern 65, thus reducing the manufacturing cost of the projection module 1000 and facilitating the popularization of the projection module 1000.

[0059] The incident surface 21 and the exit surface 22 of the lens 20 are interfaces formed on the free lens surface. When the free lens is used, incident light 61 needs to be shot into the incident surface 21, and the incident light 61 enters the lens 20 after being collimated by the incident surface 21 to form parallel light 62; the parallel light 62 is shaped by the exit surface 22 into exit light 63 containing pattern information, and the exit light 63 can form a preset pattern 65 when it irradiates onto a projection surface 64. The shape of the incident surface 21 can be a free curved surface, a non-spherical curved surface or a spherical curved surface, which depends on the nature of the incident light 61. In one example, when the incident light 61 is a laser with Gaussian intensity distribution, the incident surface 21 can be a non-spherical curved surface; in another example, when the incident light 61 is an ideal point light source 10 with better monochromaticity (which can be obtained by laser shaping), the incident surface 21 can be a spherical curved surface.

[0060] The exit surface 22 is a free curved surface, so that the exit surface 22 can shape the parallel light 62 into exit light containing pattern information. The free curved surface can be designed by the following steps:

[0061] 1. Determine the style of the preset pattern 65 to be formed in the preset use scenario of the lens 20;

[0062] 2. Design the surface type of the exit surface 22 according to the non-optical imaging principle, Snell's law, the law of conservation of energy and the equal optical path principle, so that the exit surface 22 can basically load the information of the preset pattern 65 into the exit light;

[0063] 3. After modeling the lens 20, optimize the free curved surface surface type of the exit surface 22 in the ray tracing software Lighttools to improve its contrast and illumination uniformity, so that the exit surface 22 can better load the information of the preset pattern 65 into the exit light.

[0064] When the shape of the incident surface 21 is also a free-form surface, similar design steps can also be adopted:

[0065] 1. Determine the type of light source 10 to be processed in the preset use scenario of the lens 20;

[0066] 2. Design the surface shape of the incident surface 21 according to the non-optical imaging principle, Snell's law, the law of conservation of energy, and the equal optical path principle, so that the incident surface 21 can substantially collimate the incident light 61 into parallel light 62;

[0067] 3. After modeling the lens 20, optimize the free-form surface shape of the incident surface 21 in the light ray tracing software Lighttools, so that the collimation effect of the incident surface 21 is better.

[0068] Since the light source 10 to be processed by the incident surface 21 is sometimes relatively simple (for example, a point light source 10 or a laser light source 10, etc.), the third step can sometimes be ignored, that is, after the second step is completed, sufficient collimation effect can be achieved.

[0069] The lens 20 can be placed in a preset medium, such as air or nitrogen. This depends on the working conditions of the lens 20. In one example, the lens 20 is arranged in a vehicle, and the space around the lens 20 can be connected to the atmosphere, so that the lens 20 works in air; in another example, the lens 20 is arranged in a device that needs to be waterproof (such as a diving device), and the lens 20 and the electronic and electrical equipment such as the light source 10 used in cooperation with the lens 20 can be packaged together in a shell filled with nitrogen, so as to avoid damage to the electronic and electrical equipment due to water. However, it should be noted that the incident surface 21 and the exit surface 22 can shape the light by making the refractive index of the medium in the environment different from the refractive index of the material of the lens 20, so the refractive index of the medium in the working environment of the lens 20 will affect the working of the lens 20, and therefore, when designing the surface shape of the incident surface 21 and the exit surface 22 of the lens 20, the refractive index of the medium in the working environment of the lens 20 and the refractive index of the material of the lens 20 itself should be considered.

[0070] The exit light of the lens 20 loaded with the graphic information of the preset pattern 65 has a better imaging effect on one surface, which is the projection surface 64. In actual use, when the actual projection plane of the exit light of the lens 20 is different from the projection surface 64, the exit light imaging will deviate from the preset pattern 65, but when the actual projection plane is not much different from the projection surface 64, such deviation will not affect the function of the preset pattern 65. In one example, when the lens 20 is used in a vehicle, and the projected preset pattern 65 is an arrow shape as shown in the figure, with the arrow pointing to the direction in which the driver expects to drive, when the arrow distortion is not large, other drivers who see the arrow pattern can still judge the driving intention of the driver of the vehicle. Figure 8 ​

[0071] The preset graphic 65 can have various shapes, for example... Figure 2 The triangular shape shown, such as Figure 8 The shapes shown can be arrow-shaped, "X"-shaped, or "O"-shaped. Depending on the preset shape, there are various applications. In one example, when a driver needs to open a door, an "X" can be projected within the door's opening range to warn pedestrians not to stand there. In another example, when a driver is reversing in a garage, an "X" can be projected onto the wall behind the vehicle to warn pedestrians not to stand behind it. In yet another example, when a vehicle stops to wait for a pedestrian crossing the zebra crossing, an arrow can be projected onto the ground in front of the vehicle, pointing in the direction the pedestrian is walking, asking the pedestrian to cross first.

[0072] Please refer to Figure 1 In some embodiments, the refractive index of lens 20 is greater than or equal to 1.584 and less than or equal to 1.586.

[0073] According to Snell's Law, the smaller the refractive index of lens 20, the weaker the ability of the incident surface 21 or the exit surface 22 to refract light. That is, the angle of incidence (the angle between the incident ray 61 and the interface normal) and the angle of exit (the angle between the refracted ray and the interface normal) of the light rays on the incident surface 21 or the exit surface 22 are closer in magnitude. Therefore, when the resulting predetermined pattern 65 is the same, the exit surface 22 needs a larger maximum curvature to meet the requirements for the degree of light refraction. This necessitates a greater degree of curvature in the exit surface 22, which in turn requires a greater thickness of lens 20 along the propagation direction of the parallel light 62 to accommodate the curvature of the exit surface 22. However, a thicker lens 20 requires more material, increasing the production cost of lens 20.

[0074] According to Snell's Law, the higher the refractive index of lens 20, the stronger the ability of the incident surface 21 or the exit surface 22 to refract light. Therefore, when the resulting pre-defined pattern 65 is the same, the exit surface 22 needs a smaller maximum curvature; otherwise, the degree of light refraction would be too great, and the pre-defined pattern 65 could not be formed. This requires the exit surface 22 to have a smaller degree of curvature, and different parts of the exit surface 22 need to have similar degrees of undulation along the direction of parallel light 62 propagation. Under the same manufacturing tolerance, the distortion of the resulting pre-defined pattern 65 is greater, which makes the required manufacturing tolerance of lens 20 smaller and the manufacturing difficulty greater.

[0075] When the refractive index of the lens 20 is greater than or equal to 1.584 and less than or equal to 1.586, the thickness of the lens 20 is moderate, the lens 20 does not waste material, and the curvature of the exit surface 22 is moderate, and the manufacturing difficulty is relatively small, thus the above problems can be overcome. In one example, the refractive index of the lens 20 can be 1.5842, 1.5844, 1.5846, 1.5848, 1.585, 1.5852, 1.5854, 1.5856, 1.5858, or 1.586. In addition, the refractive index range also belongs to the refractive index range of the optical PC, and thus the lens 20 can be manufactured by using the optical PC to reduce the production cost.

[0076] Please refer to Figure 1 In some embodiments, the thickness of the lens 20 is greater than or equal to 5 mm and less than or equal to 15 mm.

[0077] The propagation direction of the parallel light 62 is also the arrangement direction of other devices used in cooperation with the lens 20. In one example, please refer to Figure 5 The heat sink 30, the circuit board 50, the light source 10, and the lens 20 are arranged along the propagation direction of the parallel light 62 and along the thickness direction of the lens 20. Thus, when the thickness of the lens 20 is greater than 15 mm, the installation space 41 of other devices arranged along the propagation direction of the parallel light 62 can be occupied, which is not conducive to the installation of the devices. When the thickness of the lens 20 is less than 5 mm, the distance between the exit surface 22 and the entrance surface 21 is too small, and when the fluctuation of the exit surface 22 along the propagation direction of the parallel light 62 is greater than 5 mm, the lens 20 cannot meet the requirements of the surface shape of the exit surface 22. When the maximum length is greater than or equal to 5 mm and less than or equal to 15 mm, the above problems can be overcome, and the other devices arranged along the propagation direction of the parallel light 62 have sufficient installation space 41, and the surface shape of the exit surface 22 is satisfied. In one example, the maximum length of the lens 20 along the propagation direction of the parallel light 62 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 14 mm, or 15 mm.

[0078] The thickness of the lens 20 can be understood as the maximum length of the lens 20 along the propagation direction of the parallel light 62. To measure the maximum length of the lens 20 along the propagation direction of the parallel light 62, a projection surface passing through any light ray of the parallel light 62 can be set, the lens 20 is projected onto the projection surface along the normal direction of the projection surface, and the size of each part of the projection is measured along the propagation direction of the parallel light 62, and the maximum value is the maximum length.

[0079] Please refer to Figure 1 In some embodiments, the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62 is greater than or equal to 15 mm and less than or equal to 20 mm.

[0080] When the lens 20 is applied to the projection module 1000, the lens 20 can need to be arranged side by side in the direction perpendicular to the propagation direction of the parallel light 62. When the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62 is greater than 20 mm, the size of the projection module 1000 in the direction perpendicular to the propagation direction of the parallel light 62 will be multiplied, which makes the size of the projection module 1000 too large, and is not conducive to the combination of the projection module 1000 with the vehicle or other devices. When the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62 is less than 15 mm, the light flux of the incident light 61 that the lens 20 can receive is small, and the brightness of the preset pattern 65 formed is low, which is not conducive to the observation of other drivers. When the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62 is greater than or equal to 15 mm and less than or equal to 20 mm, the size of the lens 20 will not be too large, which avoids the size of the projection module 1000 being too large, is conducive to the installation of the projection module 1000 on the vehicle or other devices, and can receive sufficient light flux of the incident light 61, which ensures the brightness of the preset pattern 65. In an example, if the projection module 1000 is provided with three lenses 20, the projection module 1000 will increase by 3*1 mm in size when one lens 20 increases by 1 mm in aperture. Therefore, increasing the aperture of the lens 20 will multiply the size of the projection module 1000. In an example, the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62 can be 15.5 mm, 16 mm, 16.5 mm, 17 mm, 17.5 mm, 18 mm, 18.5 mm, 19 mm, 19.5 mm, or 20 mm.

[0081] To measure the maximum aperture of the lens 20 in the direction perpendicular to the propagation direction of the parallel light 62, a projection plane perpendicular to the propagation direction of the parallel light 62 can be provided, the lens 20 is projected onto the projection plane along the propagation direction of the parallel light 62, and then the distance between any two points on the projection plane is measured. The maximum value of the distance between any two points on the projection plane is the maximum aperture mentioned above.

[0082] Please refer to Figure 2 , Figure 3 and Figure 4 In some embodiments, the exit surface 22 is configured to make the exit light 63 and the projection surface 64 have a preset angle, and the preset angle is less than 90°.

[0083] Since the preset pattern 65 can have a marking function, when the lens 20 is applied to a specific device, the setting position of the lens 20 often has some limitations. In an example, please refer to Figure 7 When the lens 20 is applied to the projection module 1000 and the projection module 1000 is installed on the vehicle, the preset pattern 65 can be as shown inFigure 8 As shown in the arrow shape, the projection module 1000 can be mounted on the front bumper 70 of the vehicle. The preset graphic 65 can be projected onto the bottom surface in front of the vehicle. The arrow indicates the direction the driver intends to drive, thus alerting other drivers to the vehicle's movement. At this time, the emitted light 63 needs to be projected onto the ground 67. If the projection surface 64 is not on the ground 67, the image of the emitted light 63 on the ground 67 will be distorted, meaning the preset graphic 65 will not form well. Therefore, the projection surface 64 needs to be on the ground 67. If the preset angle is equal to 90°, the projection module 1000 also needs to be positioned in front of the vehicle body, directly above the projection surface 64. This requires a bracket extending beyond the vehicle body to mount the projection module 1000 outside the vehicle body. When the preset angle is less than 90°, then... Figure 7 In the illustrated embodiment, the projection module 1000 is mounted on the front bumper 70 of the vehicle, allowing the projection surface 64 to be placed on the ground 67 in front of the vehicle. This facilitates the installation of the projection module 1000 and enables it to meet a wider range of application scenarios. In one example, when it is necessary to project an "X"-shaped preset graphic 65 within the movement range of the vehicle door to warn pedestrians not to stand there, the preset graphic 65 also needs to be projected outside the vehicle body. In another example, when it is necessary to project a preset graphic 65 behind the vehicle... Figure 8 When using the arrow-shaped preset graphic 65 as shown, it is also necessary to project the preset graphic 65 onto the outside of the vehicle body. In the examples above, the preset angle can be made less than 90° to facilitate projection.

[0084] The preset angle refers to the angle between the central ray of the emitted light 63 and the projection surface 64. The magnitude of this angle can be taken from the mathematical definition of the angle between a line and a plane, that is, the angle between the projection of the line onto the plane along the normal direction of the plane and the line itself. The central ray of the emitted light 63 can be identified by connecting the geometric center points of the two wavefronts of the emitted light 63; the ray coinciding with this line is the central ray. Alternatively, the propagation direction of the parallel light 62 can be directly taken as the propagation direction of the central ray of the emitted light 63; the ray in the emitted light 63 that has the same propagation direction as the parallel light 62 is the central ray. To facilitate the confirmation of the preset angle, in... Figure 7 In the diagram, angle α represents the preset angle.

[0085] Please refer to Figure 3 , Figure 4 and Figure 7 In some implementations, the preset angle is greater than or equal to 45° and less than or equal to 60°.

[0086] To better suit applications of lens 20 in vehicles, the preset angle is set to a range greater than or equal to 45° and less than or equal to 60°. Please refer to [reference needed]. Figure 7When the projection module 1000 with the lens 20 is set on the vehicle, if it is needed to project the preset pattern 65 on the ground 67, and the distance between the projection module 1000 and the ground 67 is unchanged, the greater the preset angle, the closer the preset pattern 65 is to the vehicle horizontally; the smaller the preset angle, the farther the preset pattern 65 is to the vehicle horizontally. If the preset pattern 65 is too close to the vehicle, the preset pattern 65 can be blocked by the vehicle body, and thus it is difficult to be observed by more drivers; if the preset pattern 65 is too far from the vehicle body, the outgoing light 63 can be attenuated too much in the propagation process, and thus the brightness of the preset pattern 65 is reduced, and it is difficult to be observed by other drivers. In addition, there are regulations that the projected pattern must be within a certain range outside the vehicle body, and thus if the preset pattern 65 is too far from the vehicle body, it can violate the relevant regulations. When the preset angle is greater than or equal to 45° and less than or equal to 60°, the preset pattern 65 can be at a suitable distance from the vehicle body, so that the preset pattern 65 can be observed by more drivers and has sufficient brightness to attract the attention of other drivers, thus overcoming the above problems. In one example, the preset angle can be 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°.

[0087] In order to make the preset angle less than 90°, or further within the above range, the light exit surface can be designed by the following steps:

[0088] 1. In the case of a preset angle of 90°, based on Lighttools optimization, the required preset pattern 65 is projected, as shown in Figure 2 .

[0089] 2. By rotating the projection surface 64 to achieve inclined illumination, the illumination light shape is optimized based on Lighttools, as shown in Figure 3 .

[0090] 3. Continue to rotate the projection surface 64 and optimize to achieve the effect of ground 67 illumination, as shown in Figure 4 .

[0091] Please refer to Figure 8 , in some embodiments, the preset pattern 65 has an outer contour, and the length of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm.

[0092] The outer contour defines the irradiation range of the preset pattern 65. When the lens 20 is applied to a vehicle, please refer to Figure 7The length of the outer contour defines the extension of the preset pattern 65 in the horizontal direction away from the vehicle body. When the length of the outer contour is too small, the preset pattern 65 cannot extend far enough away from the vehicle body to be observed by more drivers; when the length of the outer contour is too large, the preset pattern 65 can be projected onto other vehicles, resulting in the failure of projection. When the length of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm, the preset pattern can extend far enough away from the vehicle body to be observed by more drivers, and is less likely to be projected onto other vehicles, thereby reducing the risk of projection failure. Thus, the above problems can be overcome. In one example, the length of the outer contour can be 200 mm, 220 mm, 240 mm, 260 mm, 280 mm, 300 mm, 320 mm, 340 mm, 360 mm, 380 mm, or 400 mm.

[0093] The outer contour of the preset pattern 65 can be the smallest rectangle that can frame the preset pattern 65. If the preset pattern 65 is a rectangle, the outer contour is the preset pattern 65 itself. If the preset pattern 65 is an arrow shape as shown in FIG. 6A, the outer contour of the preset pattern 65 is the smallest rectangle that can frame the arrow. Figure 8 In particular, the projection module 1000 can have multiple light sources 10 and multiple lenses 20. In one example, the projection module 1000 has three light sources 10 and three lenses 20 corresponding to the three light sources 10, and thus three arrow-shaped preset patterns 65, i.e., a first pattern 651, a second pattern 652, and a third pattern 653 as shown in FIG. 6B, can be generated. Figure 5 In particular, the projection module 1000 can have multiple light sources 10 and multiple lenses 20. In one example, the projection module 1000 has three light sources 10 and three lenses 20 corresponding to the three light sources 10, and thus three arrow-shaped preset patterns 65, i.e., a first pattern 651, a second pattern 652, and a third pattern 653 as shown in FIG. 6B, can be generated. Figure 8 In particular, the projection module 1000 can have multiple light sources 10 and multiple lenses 20. In one example, the projection module 1000 has three light sources 10 and three lenses 20 corresponding to the three light sources 10, and thus three arrow-shaped preset patterns 65, i.e., a first pattern 651, a second pattern 652, and a third pattern 653 as shown in FIG. 6B, can be generated.

[0094] Please refer to FIG. 6A and FIG. 6B. Figure 8 In some embodiments, the width of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm.

[0095] When the lens 20 is applied to a vehicle, please refer to FIG. 7A and FIG. 7B. Figure 7The width of the outer contour is the extension length of the preset pattern 65 in the horizontal direction and in the direction around the vehicle body. One vehicle can be provided with multiple projection modules 1000, and thus can have multiple preset patterns 65, each of which is distributed in the surrounding direction of the vehicle, and each of which needs to be spaced apart from each other. However, the space around the vehicle body is limited, and thus the width of the outer contour is too large, which can easily cause each preset pattern 65 to overlap or be too close to each other, making it difficult to distinguish. If the width of the outer contour is too small, the preset pattern 65 can be too small in size and difficult to identify. When the width of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm, the preset patterns 65 can have sufficient spacing between each other, and the preset pattern can also have sufficient size, thereby facilitating identification and overcoming the above problems. In one example, the width of the outer contour can be 200 mm, 220 mm, 240 mm, 260 mm, 280 mm, 300 mm, 320 mm, 340 mm, 360 mm, 380 mm, or 400 mm.

[0096] In particular, the length of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm, and the width is greater than or equal to 200 mm and less than or equal to 400 mm. In this way, the projection surface 64 of the outgoing light 63 is moderate, and it is not easy to produce a large area of bright spots on the road surface, which can interfere with the observation of road conditions by other drivers.

[0097] Please refer to Figure 8 In some embodiments, the exit surface 22 is configured to shape the parallel light 62 such that the illumination ratio between the illumination of the preset pattern 65 and the illumination of the environment at the projection surface 64 is greater than or equal to 10:1 and less than or equal to 100:1.

[0098] The greater the illumination ratio of the preset pattern 65 relative to the illumination of the environment at the projection surface 64, the greater the brightness of the preset pattern 65 compared to the environment, and the easier it is for other drivers to see. However, if the illumination ratio is too large, it can be difficult for other drivers to see the road conditions around the preset pattern 65, causing light pollution. When the illumination ratio is within the above range, other drivers can observe the preset pattern 65, and other drivers can also see the road conditions around the preset pattern 65, ensuring driving safety and overcoming the above problems. In one example, the illumination ratio can be 10:1, 15:1, 20:1, 30:1, 40:1, 50:1, 55:1, 60:1, 65:1, 70:1, 75:1, 80:1, 85:1, 90:1, 95:1, or 100:1.

[0099] The illumination ratio is the ratio of the luminance of the preset pattern 65 to the ambient luminance at the projection surface. To ensure that the illumination ratio is within the above range, the illumination ratio can be set to the minimum value within the range when the ambient luminance is the maximum. For example, the ambient luminance is set to the average (or maximum) luminance at noon in summer, and the luminance of the preset pattern 65 is set to a value that can satisfy the above range in this case. The luminance of the preset pattern 65 can be set in two aspects, one is the luminance of the light source 10 cooperating with the lens 20, and the other is the irradiation range of the preset pattern 65 on the projection surface 64. The greater the luminance of the light source 10 or the smaller the irradiation range, the greater the luminance of the preset pattern 65. In some embodiments, the light intensity of the light source 10 can also be changed with the ambient luminance, so that the illumination ratio is within the above range.

[0100] Referring to Figure 8 In some embodiments, the exit surface 22 is configured to shape the parallel light 62 so that the illumination ratio of the preset pattern 65 to the environment is greater than or equal to 50:1 and less than or equal to 100:1.

[0101] This can further improve the visibility of the preset pattern 65, and make it easier for other traffic participants to identify the preset pattern 65.

[0102] Referring to Figure 5 and Figure 6 In some embodiments, the preset pattern 65 is a turn signal pattern. This can make it easier for other traffic participants to obtain the turning intention of the driver of the vehicle, and improve the driving safety of the vehicle. The turn signal pattern can be an arrow-shaped pattern as shown in Figure 6 , which can make the arrow point to the direction in which the driver is expected to turn, thereby indicating the turning intention of the driver. The turn signal pattern can also be other patterns with directional information, such as a gesture pointing pattern, etc.

[0103] Referring to Figure 1 and Figure 5 The projection module 1000 of the embodiments of the present application includes the light source 10 and the lens 20 described above. The entrance surface 21 is configured to receive the light emitted by the light source 10 as the incident light 61. Therefore, the projection module 1000 of the embodiments of the present application has all the beneficial effects of the embodiments of the lens 20 described above, which will not be repeated here.

[0104] Referring to Figure 5 In some embodiments, the light source 10 is a Lambertian light source.

[0105] The Lambertian light source is a relatively common type of light source 10, which can be obtained at low cost. In addition, the exit light of the Lambertian light source conforms to the Lambertian light intensity distribution, which is relatively regular, and facilitates the shaping of the exit light of the Lambertian light source by the lens 20.

[0106] A Lambertian light source refers to a light source 10 whose light intensity distribution conforms to a Lambertian light intensity distribution. The Lambertian light intensity distribution is I = I0cos(φ), where φ is the included angle between the observation angle and the optical axis of the light source 10, I0is the light intensity when φ is 0, and I is the observed light intensity at the observation angle. Some light-emitting diodes (LEDs) can serve as Lambertian light sources, or any light source 10 can be made to irradiate ground glass, and the reflected light of the ground glass can also serve as a Lambertian light source.

[0107] Please refer to Figure 5 In some embodiments, the center wavelength of the light source 10 is greater than or equal to 580 nm and less than or equal to 595 nm.

[0108] The center wavelength of the light source 10 determines the color of the light source 10, and thus determines the color of the preset pattern 65. When the center wavelength of the light source 10 is too long, it can be easily confused with a red traffic signal light, causing other drivers to misjudge. When the center wavelength of the light source 10 is too short, it can be easily confused with a green traffic signal light, causing other drivers to misjudge. When the center wavelength of the light source 10 is within the above range, the preset pattern 65 can be amber in color, making it easier for other drivers to recognize, thereby overcoming the above problems. In one example, the center wavelength of the light source 10 can be 580 nm, 583 nm, 585 nm, 588 nm, 590 nm, 591 nm, 592 nm, 593 nm, 594 nm, or 595 nm.

[0109] Please refer to Figure 5 , Figure 6 and Figure 8 In some embodiments, the projection module 1000 includes at least two lenses 20, and the projection module 1000 is used to project a plurality of preset patterns 65.

[0110] Such a projection module 1000 can have the ability to project a plurality of preset patterns 65. On the one hand, when one light source 10 fails, other light sources 10 can still work to project at least one preset pattern 65, ensuring the stability of the projection module 1000. On the other hand, when the projection module 1000 is used in a vehicle, the projection module 1000 can project a plurality of preset patterns 65, making it easier for drivers of other vehicles to see the preset patterns 65 and ensuring driving safety.

[0111] In one example, Figure 5 The embodiment shown has three light sources 10 and three lenses 20. The projection effect of one light source 10 and one lens 20 is shown in FIG. 4, and the projection effect of three light sources 10 and three lenses 20 is shown in FIG. 5. Figure 6 It can be seen that one light source 10 and one lens 20 can project an arrow, and the projection effect of three light sources 10 and three lenses 20 is shown in FIG. 5. Figure 8It can be seen that the three light sources 10 and the three lenses 20 can project three arrows, i.e., the first pattern 651, the second pattern 652 and the third pattern 653.

[0112] It can be understood that the projection module 1000 can also use one light source 10 to provide incident light 61 for at least two lenses 20 at the same time, so as to reduce the manufacturing cost of the projection module 1000.

[0113] It can be understood that the projection module 1000 can also use one light source 10 to provide incident light 61 for at least two lenses 20 at the same time, so as to reduce the manufacturing cost of the projection module 1000. Figure 5 In some embodiments, the projection module 1000 further comprises a controller, and the light source 10 is at least two, and the controller is used to control the light source 10, so that the at least two light sources 10 can be independently lighted under the control of the controller.

[0114] The controller allows the light source 10 to be independently lighted, so that different preset patterns 65 can be displayed according to a certain rule, thereby showing a unique display effect, which is helpful for other drivers to recognize.

[0115] In one example, referring to Figure 8 , Figure 8 The three preset patterns 65 can be displayed in the following way:

[0116] When the driver of the vehicle sends a signal to turn on the turn signal, the left field controller of the vehicle receives the signal, and the left field controller transmits a sequential projection signal to the controller of the projection module 1000 through a controller area network (CAN) bus. The controller can be a control circuit provided on the circuit board 50 as shown in Figure 5 The controller controls the light source 10 to be sequentially lighted, forming a flowing water effect. Specifically, the turn signal flashing period is 0.8s, and the projection module 1000 flashes synchronously; when the turn signal is on, the first pattern 651 is first lighted, then the second pattern 652 is lighted, and finally the third pattern 653 is lighted; when the second pattern 652 is lighted, the first pattern 651 remains constant, and when the third pattern 653 is lighted, the first pattern 651 and the second pattern 652 remain constant; the first pattern 651, the second pattern 652 and the third pattern 653 are extinguished synchronously when the turn signal is off; the time interval of the first pattern 651, the second pattern 652 and the third pattern 653 is the same, which is 60ms; after all the symbols are lighted, it is maintained for 220ms; then the projection module 1000 is maintained in a full-off state for 400ms, a total of 0.8s, which is consistent with the turn signal flashing period.

[0117] In the above control method, the preset pattern 65 is used to prompt the other driver that the vehicle needs to turn in the direction indicated by the arrow. In other embodiments, the preset pattern 65 can also prompt the other driver that the vehicle needs to reverse, and in this case, the controller can control the preset pattern 65 and the reversing light of the vehicle to be turned on at the same time upon receiving the reversing instruction from the driver.

[0118] Please refer to Figure 5 In some embodiments, the projection module 1000 is applied to a vehicle, and the left domain controller of the vehicle includes the controller.

[0119] The left domain controller of the vehicle can receive the signal from the driver, so as to facilitate the driver to control the projection module 1000.

[0120] The left domain controller can receive the speed information of the vehicle, and when the vehicle speed is higher than 30km / h, the left domain controller can forcibly turn off the projection module 1000, because the preset pattern 65 projected by the projection module 1000 is more suitable when the vehicle speed is low, and turning off the projection module 1000 when the vehicle speed is high can reduce the energy consumption.

[0121] The left domain controller of the vehicle includes the controller can include at least two embodiments: the first embodiment is that the storage medium of a controller in the left domain controller of the vehicle stores the control method of the light source, and the controller serves as the controller of the projection module 1000; the second embodiment is that the controller of the projection module 1000 is a separate controller, for example, the controller is integrated on the circuit board of the embodiment shown, and the controller serves as part of the left domain controller. Figure 5

[0122] Please refer to Figure 5 In some embodiments, the projection module 1000 further includes a heat sink 30, and the heat sink 30 is in heat conduction connection with the light source 10.

[0123] The heat sink 30 can dissipate heat for the light source 10, avoid overheating of the light source 10, and ensure the stable operation of the projection module 1000.

[0124] The heat sink 30 can be a heat conductor with a large surface area, which conducts the heat of the light source 10 to itself, and then dissipates heat through the surface, so as to dissipate the heat of the light source 10 to the environment. The heat sink 30 can also be a fan, which blows away the hot air around the light source 10 to dissipate heat for the light source 10. It can be understood that mass exchange is also a form of heat transfer, so the heat conduction connection can include the embodiment that the heat sink 30 is a fan, which dissipates heat by air exchange.

[0125] The heat sink 30 can be, for example, Figure 5 ​The lens 20 and the light source 10 are arranged on the side of the circuit board 50 away from the light source 10. In this embodiment, the light source 10 can be an LED, which is mounted on the circuit board 50 and controlled and powered by the circuit board 50. The heat sink 30 simultaneously dissipates heat for the LED and the circuit board 50. In other embodiments, the heat sink 30 can be in direct contact with the light source 10 to dissipate heat for the light source 10.

[0126] Reference should be made to Figure 5 In some embodiments, the projection module 1000 further comprises a mounting frame 40, the mounting frame 40 is provided with a mounting space 41, and the mounting frame 40 is provided with a light outlet 42 in communication with the mounting space 41; the light source 10 and the lens 20 are mounted in the mounting space 41; and the emitted light 63 is projected out of the mounting frame 40 through the light outlet 42.

[0127] The mounting space 41 in the mounting frame 40 can facilitate mounting of the light source 10 and the lens 20, and the mounting frame 40 can also facilitate mounting of the projection module 1000 on other devices, such as a vehicle body.

[0128] The inner side of the mounting frame 40 can be provided with a structure for fixing the heat sink 30, the circuit board 50, the light source 10 and the lens 20, and the outer side of the mounting frame 40 can be provided with a structure for fixing connection with the vehicle. The light outlet 42 can be covered with a transparent material to seal the mounting space 41. The light outlet 42 can also be open to ensure the light emission effect.

[0129] Reference should be made to Figure 1 and Figure 5 The vehicle of the embodiments of the present application comprises the lens 20 or the projection module 1000 described above, and thus has at least the beneficial effects of all the embodiments of the lens 20 or the projection module 1000 described above, which will not be described here.

[0130] The vehicle can be a new energy vehicle, a hybrid vehicle or a fuel vehicle, and the present application does not limit the specific form of the vehicle.

[0131] Reference should be made to Figure 7 In some embodiments, the lens 20 is configured such that the minimum distance between the center of the preset pattern 65 and the orthographic projection of the vehicle body to the projection surface 64 is greater than or equal to 350 mm and less than or equal to 500 mm.

[0132] In Figure 7In the embodiment shown, the projection surface 64 is on the ground 67, so the distance between the orthographic projection of the vehicle body on the projection surface 64 and the center of the preset pattern 65 can be the horizontal distance between the vehicle body and the center of the preset pattern 65. When the horizontal distance between the center of the preset pattern 65 and the vehicle body is less than or equal to 500 mm, the preset pattern 65 can be appropriately close to the vehicle body, avoiding distortion of the preset pattern 65 projected onto the vehicle body or the body of other road users, and facilitating the maintenance of the shape of the preset pattern 65 and the understanding of the meaning of the preset pattern 65 by other road users. When the horizontal distance between the center of the preset pattern 65 and the vehicle body is greater than or equal to 350 mm, the preset pattern 65 can be appropriately away from the vehicle body or just abut the vehicle body, which can facilitate the observation of the preset pattern 65 by other road users or avoid distortion of the preset pattern 65 projected onto the vehicle body. When the distance between the center of the preset pattern 65 is greater than or equal to 350 mm and less than or equal to 500 mm, all the above technical effects are achieved.

[0133] In one example, the distance between the orthographic projection of the vehicle body to the projection surface 64 and the center of the preset pattern 65 can be 350 mm, 360 mm, 370 mm, 380 mm, 390 mm, 400 mm, 410 mm, 420 mm, 430 mm, 440 mm, 450 mm, 460 mm, 470 mm, 480 mm, 490 mm, or 500 mm.

[0134] The center of the preset pattern 65 can be understood as the geometric center of the preset pattern, for example, when the preset pattern 65 is circular, the center is the center of the circle; when the preset pattern is rectangular, the center is the intersection of the diagonals; when the preset pattern is elliptical, the center is the midpoint of the foci of the ellipse. The center of the preset pattern 65 can also be found by optical methods, that is, the point of the preset pattern 65 corresponding to the center light mentioned above is the center of the preset pattern 65. However, when the preset pattern 65 does not have obvious geometric features, the preset pattern 65 can be divided into pixels, and the pixels can be placed in a coordinate system. For a coordinate axis of the coordinate system, the number of pixel points distributed on a coordinate of the coordinate axis is taken as the weight of the coordinate, and a weighted average of all coordinates on the coordinate axis is obtained to obtain the coordinate of the center of the preset pattern 65 on the coordinate axis. The coordinates of the center of the preset pattern 65 on all coordinate axes are obtained by performing the above operation on all coordinate axes, so as to obtain the coordinate information of the center of the preset pattern 65 and determine the position of the center of the preset pattern 65.

[0135] The minimum distance between the orthographic projection of the vehicle body to the projection surface 64 and the center of the preset pattern 65 can be determined by the following method:

[0136] The distance between all points on the projection of the vehicle body and the center point is measured, and the minimum value of all the distances is the minimum distance between the normal projection of the vehicle body to the projection surface 64 and the center of the preset pattern 65.

[0137] Please refer to Figure 5 In some embodiments, the projection module 1000 is arranged on a lamp of the vehicle.

[0138] In this way, the projection module 1000 can share a transparent shell with the lamp, which on the one hand can provide protection for the projection module 1000 and avoid damage to the projection module 1000 in rainy weather, and on the other hand, there is no need to provide an additional transparent shell for the projection module 1000, which can reduce the manufacturing cost of the projection module 1000. Figure 5 In the embodiment shown, the light exit port 42 can be arranged in an open manner, thereby reducing the manufacturing cost of the projection module 1000.

[0139] Please refer to Figure 5 In some embodiments, the projection module 1000 is arranged on the front bumper 70 of the vehicle.

[0140] In this way, the projection module 1000 can project the preset pattern 65 to the front of the vehicle. The projection module 1000 can project the preset pattern 65 shown in the front of the vehicle, thereby prompting other traffic participants of the driving direction of the vehicle. Figure 8 In some embodiments, the projection module 1000 projects the preset pattern 65 shown in the front of the vehicle, thereby prompting other traffic participants of the driving direction of the vehicle.

[0141] Please refer to Figure 5 In some embodiments, the projection module 1000 is arranged on the rear bumper of the vehicle.

[0142] In this way, the projection module 1000 can project the preset pattern 65 to the rear of the vehicle. The projection module 1000 can project the preset pattern 65 shown in the rear of the vehicle, thereby prompting other traffic participants of the driving direction of the vehicle. Figure 8 In some embodiments, the projection module 1000 projects the preset pattern 65 shown in the rear of the vehicle, thereby prompting other traffic participants of the driving direction of the vehicle.

[0143] Please refer to Figure 5 In some embodiments, the projection module 1000 is arranged on the welcome step of the vehicle.

[0144] In this way, the projection module 1000 can project the preset pattern 65 to the side of the vehicle. The projection module 1000 can project the preset pattern 65 in the shape of "X" to the side of the vehicle, prompting pedestrians not to stand in the door opening range of the vehicle.

[0145] Please refer to Figure 5 In some embodiments, the projection module 1000 is arranged on the outside rearview mirror of the vehicle.

[0146] In this way, when the vehicle door is opened, the projection module 1000 can rotate with the door mirror, and the preset pattern 65 can also rotate with the opening of the vehicle door, forming a dynamic effect and warning pedestrians and vehicles in the opening of the door to avoid pedestrians from accidentally touching the door.

[0147] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure includes all possible combinations. Other embodiments can be derived from the above-described embodiments by making logical and structural substitutions and changes without departing from the scope of the present disclosure.

[0148] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these are within the scope of the present application. Therefore, the scope of the patent protection of the present application should be subject to the appended claims.

Claims

1. A lens (20) characterized by, Comprising: an incident surface (21) configured to make incident light (61) into parallel light (62); and an exit surface (22) configured to shape the parallel light (62) into exit light (63) for projecting on a projection surface (64) to form a preset pattern (65). The refractive index of the lens (20) is greater than or equal to 1.584 and less than or equal to 1.

586.

2. The lens (20) according to claim 1, characterized in that The thickness of the lens (20) is greater than or equal to 5 mm and less than or equal to 15 mm; and / or 3. The lens (20) of claim 1, characterized in that, The maximum aperture of the lens (20) is greater than or equal to 15 mm and less than or equal to 20 mm in a direction perpendicular to the propagation direction of the parallel light (62). The exit surface (22) is configured to make the exit light (63) have a preset angle with the projection surface (64), and the preset angle is less than 90°.

4. The lens (20) of claim 1, characterized in that, The preset angle is greater than or equal to 45° and less than or equal to 60°.

5. The lens (20) according to claim 4, characterized in that The preset pattern (65) has an outer contour, and the length of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm; and / or 6. The lens (20) of claim 1, characterized in that, The width of the outer contour is greater than or equal to 200 mm and less than or equal to 400 mm. The exit surface (22) is configured to shape the parallel light (62) to make the illumination ratio between the illumination of the preset pattern (65) and the illumination of the environment at the projection surface (64) greater than or equal to 10:1 and less than or equal to 100:

1.

7. The lens (20) of claim 1, characterized in that, The preset pattern (65) is a turn signal pattern.

8. The lens (20) of claim 1, characterized in that, Comprising:

9. A projection module (1000), characterized in that, a light source (10); and The lens (20) of any one of claims 1-8, the incident surface (21) is configured to receive the light emitted by the light source (10) as the incident light (61). The light source (10) is a Lambertian light source. The central wavelength of the light source (10) is greater than or equal to 580 nm and less than or equal to 595 nm.

10. The projection module (1000) according to claim 9, characterized in that, The projection module (1000) comprises at least two lenses (20), and the projection module (1000) is used for projecting a plurality of preset patterns (65).

11. The projection module (1000) according to claim 9, characterized in that, The projection module (1000) further comprises a controller, and the light source (10) has at least two; the controller is used for controlling the light source (10), so that at least two light sources (10) can be independently lit under the control of the controller.

12. The projection module (1000) according to claim 9, characterized in that, The projection module (1000) is applied to a vehicle, and a left field controller of the vehicle comprises the controller.

13. The projection module (1000) according to claim 12, characterized in that, The projection module (1000) further comprises a heat sink (30) in thermal conductive connection with the light source (10).

14. The projection module (1000) according to claim 13, characterized in that, The projection module (1000) further comprises a mounting frame (40) with a mounting space (41) formed therein, and the mounting frame (40) is provided with a light outlet (42) in communication with the mounting space (41); the light source (10) and the lens (20) are mounted in the mounting space (41); and the exit light (63) is projected out of the mounting frame (40) through the light outlet (42).

15. The projection module (1000) according to claim 9, characterized in that, ​ 16. The projection module (1000) according to claim 9, characterized in that, ​ 17. A vehicle characterized by comprising: The lens (20) of any one of claims 1-8 or the projection module (1000) of any one of claims 9-16.

18. The vehicle of claim 17, wherein, The lens (20) is configured such that a minimum distance between a center of the preset pattern (65) and a normal projection of a vehicle body of the vehicle onto the projection surface (64) is greater than or equal to 350 mm and less than or equal to 500 mm.

19. The vehicle of claim 17, wherein, The projection module (1000) is disposed on a lamp of the vehicle; and / or The projection module (1000) is disposed on a front bumper (70) of the vehicle; and / or The projection module (1000) is disposed on a rear bumper of the vehicle; and / or The projection module (1000) is disposed on a welcome step of the vehicle; and / or The projection module (1000) is disposed on an outside rearview mirror of the vehicle.

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