Vehicle-mounted projection lamp optical system and vehicle lamp

Abstract

The optical system at least comprises a light source, a first lens, a switchable projection lens group and a second lens, the light source is used for emitting light rays, the switchable projection lens group comprises a plurality of projection lenses which are arranged at intervals in a tiled mode, and the second lens is used for emitting light rays. Each projection lens is perpendicular to the optical axis of the light source and comprises a projection pattern. The switchable projection lens group can perform lens switching relative to the light source, when the switchable projection lens group is static relative to the light source, the geometric center of one of the projection lenses coincides with the optical axis of the light source, and when the light source emits light, the geometric center of the other projection lens coincides with the optical axis of the light source. The optical axis of light sequentially penetrates through the geometric center of the first lens, the geometric center of one projection lens, the geometric center of the second lens and the geometric center of the combined lens. The system has the advantage of good imaging effect, an excellent dynamic projection scheme is realized at low cost, and the user experience and the interaction effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to an automotive projection light optical system and an automotive light including the system. Background Technology

[0002] With the development of the national economy, cars have become commonplace in households, and people's demands for automobiles are increasing. The automotive market is experiencing rapid growth, and automotive lighting is becoming increasingly sophisticated, user-friendly, and dynamic. Dynamic and high-quality interactive experiences have become a crucial component in showcasing brand image. Currently, most in-vehicle projection lights use a single projection pattern and color. Even achieving multiple projection patterns requires multiple lens groups, negatively impacting structural space and cost. Furthermore, the predominantly white color of the projection patterns is relatively monotonous and fails to meet the market's growing demand for high-quality products.

[0003] For example, the application document with application number 202080023800.9 discloses a miniature light-emitting diode, a miniature light-emitting diode device, a display and a method thereof, which mainly achieves light by a simple combination of a light source and a lens. Therefore, the existing vehicle lights have the problem that the vehicle light projection is a single projection pattern and the projection pattern cannot be changed, which does not meet the growing market demand for high quality. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the existing technology of vehicle headlight projection is a single projection pattern and the projection pattern is unchangeable, which does not meet the growing market demand for high quality.

[0005] To solve the above-mentioned technical problems, this utility model discloses an optical system for vehicle-mounted projection light. The optical system includes at least a light source, a first lens, a switchable projection lens group, and a second lens. The light source is used to emit light including at least one color. The first lens, the switchable projection lens group, and the second lens are arranged sequentially at intervals along the direction of light emission.

[0006] The switchable projection lens assembly includes multiple projection lenses arranged in a tiled manner at intervals. Each projection lens is perpendicular to the optical axis of the light source and includes a projected pattern. The incident surface of each projection lens faces the light source and the first lens, while the exit surface faces the second lens and the combined lens. The switchable projection lens assembly can switch lenses relative to the light source. When the switchable projection lens assembly is stationary relative to the light source, the geometric center of one of the projection lenses coincides with the optical axis of the light source. When the light source emits light, the optical axis of the light rays sequentially passes through the geometric center of the first lens, the geometric center of one of the projection lenses, the geometric center of the second lens, and the geometric center of the combined lens.

[0007] By adopting the above technical solution, this application arranges multiple projection lenses at intervals on a switchable projection lens group and sets a projection pattern on each projection lens, ensuring that each projection lens can work independently and will not interfere with each other. Furthermore, the switchable projection lens group can be switched conveniently and quickly, thereby achieving the effect of switching different projection patterns, thus realizing an excellent dynamic projection solution at low cost.

[0008] Furthermore, the optical axis of the light rays passes sequentially through the geometric center of the first lens, the geometric center of one of the projection lenses, the geometric center of the second lens, and the geometric center of the combined lens. This design ensures that the light rays maintain a stable path during propagation, accurately pass through the lenses, and reduce light scattering and loss, ultimately producing the best projection effect. In other words, this application achieves high-quality, low-cost RGB dynamic projection through a novel optical system design, resulting in a better user experience and interactive effects, and possessing versatility. This utility model combines the advantages of multiple projection lenses and enables flexible switching between different projection patterns. It has the advantages of multi-scenario application, good flexibility and convenience, and high projection quality.

[0009] More preferably, in this invention, the switchable projection lens group is configured as a movable turntable, the projection lens is configured as a film, the first lens is configured as a convex lens, and the second lens is configured as a plano-concave lens. The advantages of this configuration are high flexibility and clarity, better adaptability, and greater scalability.

[0010] More preferably, the second lens and the combined lens together form the Galilean telescope assembly. The combined lens includes a first cemented lens and a second cemented lens bonded together, and the combined cemented lens can correct chromatic aberration and improve image quality. Attached Figure Description

[0011] Figure 1 A schematic diagram of the composition structure of the vehicle-mounted projection lamp optical system provided in this embodiment of the utility model;

[0012] Figure 2 A schematic diagram of the optical principle of the vehicle-mounted projection lamp optical system provided in this embodiment of the utility model;

[0013] Figure 3 Experimental diagram of the spatial frequency of light propagation of the vehicle-mounted projection lamp optical system provided in this embodiment of the utility model;

[0014] Figure 4 A light distortion diagram of the vehicle-mounted projection lamp optical system provided in an embodiment of this utility model;

[0015] Figure 5 A schematic diagram of the projection of the first film of the vehicle-mounted projection lamp optical system provided in an embodiment of the present utility model;

[0016] Figure 6 A projection diagram of the second film of the vehicle-mounted projection lamp optical system provided in an embodiment of this utility model;

[0017] Figure 7 A schematic diagram of the projection of the third film of the vehicle-mounted projection lamp optical system provided in an embodiment of this utility model;

[0018] Figure 8 This is a schematic diagram of the projection of the fourth film of the vehicle-mounted projection lamp optical system provided in an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 100. Light source;

[0021] 110. Light ray; 120. Optical axis;

[0022] 200. Concentrator;

[0023] 300. First lens;

[0024] 400. Switchable projection lens group;

[0025] 410. Circular turntable; 420. Film;

[0026] 500. Second lens;

[0027] 600. Combined lens;

[0028] 610. First cemented lens; 620. Second cemented lens;

[0029] 700. Projection plane. Detailed Implementation

[0030] As mentioned in the background technology, with the development of the national economy, cars have entered thousands of households. In particular, with the rapid development of the demand in the car market, domestic cars have also begun to rise. Car lights are becoming more and more refined, humanized and dynamic. Dynamic and high-quality interactive experience has also become one of the most important components to showcase brand effect.

[0031] However, most car lights are still conventional LED lights, which do not have multi-pattern projection, or can only perform simple projection. Car lights with projection effects and dynamic projection patterns still have problems such as high manufacturing costs, poor projection quality, and poor adaptability. Therefore, due to factors such as cost and quality, conventional headlights are still more common in the market.

[0032] To address the problem that existing automotive headlight projection systems offer a single, unchanging pattern, failing to meet the growing market demand for high-quality lighting, this application provides a novel automotive projection lighting system. By incorporating a switchable projection lens group (a circular movable turntable) and specific lens combinations, this system offers a low-cost, high-quality automotive projection lighting system with diverse and dynamically switchable projection patterns. A detailed explanation follows:

[0033] This embodiment discloses an optical system for vehicle-mounted projection lighting. The optical system includes at least a light source 100, a first lens 300, a switchable projection lens group 400, and a second lens 500. The light source 100 emits light 110 including at least one color. The first lens 300, the switchable projection lens group 400, and the second lens 500 are sequentially spaced along the emission direction of the light 110. Specifically, the light source 100, the first lens 300, the switchable projection lens group 400, and the second lens 500 together form a lens projection system. That is, the vehicle-mounted projection lighting system disclosed in this embodiment illuminates or projects light using lens imaging, without involving reflection or other projection methods. Therefore, the imaging is more stable and the image quality is higher. The light source 100 can be a common light-emitting chip, LED, or other light-emitting element. When set as a light-emitting chip, it can emit light 110 of one or more colors.

[0034] In one preferred embodiment, the optical system further includes a condenser 200, which is located between the light source 100 and the first lens 300 in the direction of light 110 emission. The incident surface of the condenser 200 faces the light source 100, and the exit surface faces the incident surface of the first lens 300. Furthermore, the condenser 200 acts as a first-stage collimating lens, serving to focus and collimate the light.

[0035] Those skilled in the art should understand that the light source 100 can emit monochromatic light, such as only white, red, blue, or yellow light, and can also switch between different colors according to actual needs. For example, it can emit white light when there is a need for illumination during normal driving at night, emit red or yellow light in an emergency, and emit other colors of light in other situations. Furthermore, the spacing between the light source 100, the first lens 300, the switchable projection lens group 400, and the second lens 500 is generally a fixed size. However, when defining, designing, or developing according to different needs, the spacing between the lenses can be adjusted according to requirements, as can the lens ratio, lens thickness, etc. This embodiment does not specifically limit this. The following will explain the important improvements and inventive points of this application:

[0036] In the vehicle-mounted projection lamp optical system disclosed in this embodiment, the emission path of the light 110 is from the light source 100 to the first lens 300, and after passing through the first lens 300, it illuminates the vehicle-mounted projection lamp optical system, then projects onto the second lens 500 and finally emits outward. The important structure for realizing dynamic projection switching is the switchable projection lens group 400. The switchable projection lens group 400 includes at least a plurality of projection lenses arranged at intervals in a tiled manner. When multiple projection lenses are set, the number of projection lenses is equal to the number of projection pattern switching or represents the number of switching times. For example, when there are 4 projection lenses, it means there are 4 projection patterns and can be switched 4 times; when there are 5 projection lenses, it means there are 5 projection patterns and can be switched 5 times. Those skilled in the art can adjust the settings according to actual needs, and this embodiment does not make specific limitations in this regard.

[0037] Specifically, in this embodiment, each projection lens is arranged perpendicular to the optical axis 120 of the light source 100 and includes a projection pattern. Specifically, the projection pattern on the projection lens is the final projected pattern. In one preferred implementation, the projection lens is a single layer. However, when there is a need for a cutout or special pattern design, the projection lens can also be multi-layered, such as two or three layers. This embodiment does not specifically limit this. However, it is necessary to set the incident surface of each projection lens to face the light source 100 and the first lens 300, and the exit surface to face the second lens 500 and the combined lens 600.

[0038] In this embodiment, the switchable projection lens group 400 can switch lenses relative to the light source 100. The switching method of the switchable projection lens group 400 relative to the light source 100 can be common rotation switching, movement switching, flip switching, etc. For example, in a preferred implementation disclosed in this embodiment, the lenses are adjusted and switched by rotation switching. In another implementation, the lens switching method can be to set a transmission belt for sequential transmission switching. This embodiment does not specifically limit this. When the switchable projection lens group 400 is stationary relative to the light source 100, the geometric center of one of the projection lenses coincides with the optical axis 120 of the light source 100. When the light source 100 emits light 110, the optical axis 120 of the light 110 passes through the geometric center of the first lens 300, the geometric center of one of the projection lenses, the geometric center of the second lens 500, and the geometric center of the combined lens 600 in sequence.

[0039] More specifically, in this embodiment, the first lens 300 and the second lens 500 may be configured as either a convex lens or a concave lens, or both may be configured as convex lenses or both may be configured as concave lenses. The art can make adjustments and designs according to actual needs, and this embodiment does not make specific limitations in this regard.

[0040] This embodiment employs the aforementioned structural design, tiling multiple projection lenses at intervals on a switchable projection lens group 400, with a projection pattern set on each lens. This ensures that each lens operates independently without interference, and the switchable projection lens group 400 can be easily and quickly switched to achieve different projection patterns, resulting in an excellent dynamic projection solution at low cost. Furthermore, the optical axis 120 of the light ray 110 sequentially passes through the geometric center of the first lens 300, the geometric center of one of the projection lenses, the geometric center of the second lens 500, and the geometric center of the combined lens 600. This design ensures that the light ray 110 maintains a stable path during propagation, accurately passes through the lenses, and reduces scattering and loss, ultimately producing the best projection effect. In other words, this application achieves high-quality, low-cost RGB dynamic projection through a novel optical system design, resulting in a better user experience and interactive effects, and versatility. It combines the advantages of multiple projection lenses and enables flexible switching of different projection patterns. It offers advantages such as multi-scenario application, high flexibility and convenience, and high projection quality.

[0041] It should be noted that, in a preferred embodiment disclosed in this example, a single switchable projection lens group is provided, and it is configured as a circular movable turntable. Each turntable is provided with multiple single-layer lenses. In another embodiment, multiple layers, such as two or three layers, can be stacked within each lens frame to achieve special visual effects such as hollow patterns or superimposed patterns. In yet another embodiment, two, three, or more circular movable turntables can be arranged sequentially at intervals. For example, when two circular movable turntables are arranged at intervals, and each turntable is provided with four lenses, 16 combination modes can be achieved by rotating and adjusting the two turntables. Those skilled in the art can design and adjust according to actual needs, and this embodiment does not impose specific limitations on this.

[0042] Further preferred, please refer to Figure 1In this embodiment, the switchable projection lens group 400 includes a movable turntable. Setting the switchable projection lens group 400 as a movable turntable allows for convenient and rapid switching between different projection lenses. This design enables the projection system to quickly adjust the projection content according to needs, improving the system's flexibility and convenience. Furthermore, the movable turntable can be controlled to rotate using simple structures such as shafts, bearings, and gears. For example, by setting a micro motor and a shaft or gears, the rotation of the movable turntable can be controlled. It has the advantages of simple structure, compact structure, and low cost. Along the emission direction of the light 110, the movable turntable is rotatably positioned between the first lens 300 and the second lens 500. The movable turntable can rotate along an axis parallel to the optical axis 120 of the light source 100. Multiple projection lenses are evenly and spaced along its own rotation direction on the movable turntable. When the movable turntable is stationary relative to the axis, one projection lens on the movable turntable is opposite to the first lens 300, and the geometric center of one projection lens coincides with the optical axis 120 of the light source 100. For example, three, four, five or even more projection lenses can be set on the movable turntable. Furthermore, the projection lenses can be fixed on the movable turntable by snap-fitting, integral molding, bonding or other methods. Preferably, in this embodiment, a slot is set on the movable turntable, and then the projection lenses are snapped into the slot. They can also be adjusted and replaced as needed.

[0043] More preferably, in this embodiment, the movable turntable is a circular turntable 410 that rotates around an axis. Multiple projection lenses on the circular turntable 410 are evenly and spaced apart around the axis of rotation, and the central angles subtended by the geometric centers of adjacent projection lenses are the same. Furthermore, multiple circular slots are evenly and spaced apart on the circular turntable 410 around the axis of rotation, and each circular slot contains a projection lens, including a film 420. Film 420 is a commonly used projection material, characterized by high resolution, vibrant colors, and strong lightfastness. Using film 420 as a projection lens ensures that the projected image is clear, detailed, and has high color fidelity.

[0044] For example, when there are 4 film plates 420, the included angle between the central angles of two adjacent film plates 420 is 90°. When there are 6 film plates 420, the included angle between the central angles of two adjacent film plates 420 is 60°. That is to say, when there are 4 film plates 420, rotating 90° will change the lens pattern. When there are 6 film plates 420, rotating 60° will change the lens pattern. Those skilled in the art can adjust and select according to actual needs. This embodiment does not make specific limitations in this regard.

[0045] This embodiment also discloses an optical system for vehicle-mounted projection light. The first lens 300 is configured as a convex lens, comprising a first incident surface and a first exit surface. At least one of the first incident surface and the first exit surface is convex. The light source 100 is directly opposite the first incident surface and is located at the focal point of the convex lens. The first lens 300 is a convex lens, characterized by its converging effect on light rays 110. In the projection system, the convex lens can focus the light rays 110 emitted by the light source 100, allowing the light rays 110 to be projected more accurately onto the projection lens, thereby improving the projection effect.

[0046] More preferably, the second lens 500 includes a plano-concave lens, which comprises a second incident surface and a second exit surface; wherein the second incident surface is planar and the second exit surface is concave. The second lens 500 is a plano-concave lens, characterized by its ability to diverge light rays 110. In the projection system, the plano-concave lens can further adjust the direction and diffusion angle of the light rays 110, ensuring that the projected image covers a wider area while maintaining image clarity and contrast.

[0047] Specifically, the light 110 emitted by the light source 100 is first focused by a convex lens and then projected onto a film 420 on a movable turntable. The pattern on the film 420, after being illuminated by the light 110, forms patterned light rays 110. These light rays 110 are then further adjusted by a plano-concave lens and finally projected onto the projection screen. Due to the synergistic effect of the convex and plano lenses, the projection system can produce a clear and bright image. Furthermore, the film 420 on the movable turntable can be replaced as needed to project different patterns. This design gives the projection system high flexibility and scalability.

[0048] Furthermore, this utility model also discloses an optical system for vehicle-mounted projection light, which further includes a combined lens 600. The combined lens 600 is located downstream of the second lens 500 in the emission direction of the light 110, and the second lens 500 and the combined lens 600 together form the Galilean telescope group. The combined lens 600 includes a first cemented lens 610 and a second cemented lens 620 bonded together. It should be noted that in this embodiment, the combined lens 600 includes two cemented lenses. In actual production and design, this can be adjusted according to actual needs, for example, by setting one, three, or different numbers of film plates 420. This embodiment does not specifically limit this.

[0049] The combined effect of the first lens 300, the second lens 500, and the combined lens 600 (cemented lens) in this embodiment is as follows:

[0050] Chromatic aberration correction: Chromatic aberration occurs because different wavelengths of light have different refractive indices in lenses. The different lenses in the composite lens 600 can be precisely designed and manufactured to correct this chromatic aberration. Magnification provision: The focal length and magnification of the composite lens 600 depend on the focal lengths and relative positions of its individual lenses. By adjusting these parameters, the desired magnification can be obtained. Improved image quality: In addition to correcting chromatic aberration, the composite lens 600 can also improve other aberrations, such as spherical aberration and coma, thereby improving image quality. Concave or convex lenses can be used with the composite lens 600 as eyepieces to provide appropriate magnification and image quality. The negative focal length of a concave lens can be combined with the positive focal length of the composite lens 600 to produce the desired magnification effect.

[0051] Furthermore, see Figure 2 The first cemented lens 610 is located on the side closer to the light source 100 and has a convex surface facing the light source 100. The refractive index of the first cemented lens 610 is 1.5168, and the Abbe number is 64.20. Specifically, the first cemented lens 610 has a high Abbe number (64.20), which helps to reduce dispersion and improve image quality. The convex surface of the first cemented lens 610 facing the light source 100 helps to collect more light 110 and guide it into the optical system. The first cemented lens 610 is made of crown glass (K9).

[0052] The second cemented lens 620 is located on the side away from the light source 100, and its side facing away from the light source 100 is convex. The refractive index of the second cemented lens 620 is greater than 1.6, and its Abbe number is less than 50. Although the second cemented lens 620 has a low Abbe number, by combining it with the first cemented lens 610, chromatic aberration can be balanced to some extent through design optimization. In particular, within certain specific spectral ranges, the high refractive index (greater than 1.6) of the second cemented lens 620 can more effectively refract light 110, making it easier to focus on the imaging plane, thereby improving the system's resolution and sharpness. The second cemented lens 620 is made of flint glass (F).

[0053] The cemented lens employs a combination of positive and negative lenses. Utilizing the optical properties of both lenses, spherical aberration caused by off-axis rays is eliminated by optimizing their curvature. By leveraging the difference in refractive index between the two cemented lenses, simulation calculations of the optical system are performed to obtain the refractive index capable of eliminating chromatic aberration caused by different wavelengths of light, and material properties meeting the system requirements are selected from a material library. Finally, secondary optimization of the optical system is performed to eliminate field curvature and distortion in the projection.

[0054] Those skilled in the art should understand that, in different design schemes, the refractive index and Abbe number of the first cemented lens 610 and the second cemented lens 620 can be experimentally adjusted according to actual needs. For example, their thickness can also be adjusted, and this embodiment does not specifically limit this. Preferably, the first cemented lens 610 and the second cemented lens 620 are bonded together, resulting in a more compact system. This also eliminates reflection losses on both surfaces of the lens, prevents total internal reflection from occurring through air gaps, and further improves the optical performance of the system. Furthermore, it enhances durability and stability.

[0055] Furthermore, participate Figure 2 For example, when a projection plane 700 is set, the distance and angle of the projection plane can be adjusted.

[0056] This embodiment also discloses an optical system for vehicle-mounted projection light. Viewed from the optical axis 120 side of the light source 100, the first lens 300, the switchable projection lens group 400, the second lens 500, and the combined lens 600 are all arranged perpendicular to the optical axis 120. When the lenses and lens groups are arranged perpendicular to the optical axis 120, the light 110 is refracted and focused more regularly when passing through these elements, thereby reducing aberrations (such as spherical aberration, coma, etc.) and contributing to a clearer, sharper image. The perpendicular arrangement ensures that the optical axis 120 of all lenses and lens groups remains consistent, preventing the light 110 from being deflected or shifted during propagation. Furthermore, the lenses and lens groups arranged perpendicular to the optical axis 120 can better capture and transmit the light 110, reducing light loss and waste, and helping to improve the overall brightness and contrast of the optical system.

[0057] The embodiments of this invention also disclose a vehicle lamp, including a housing and a vehicle-mounted projection lamp optical system including any of the foregoing, wherein the vehicle-mounted projection lamp optical system is disposed within the housing.

[0058] See last. Figure 1 and Figure 2The specific structure of the vehicle-mounted projection light optical system disclosed in this embodiment will be explained in detail in sequence. From the light source 100 side along the direction of the light 110, the following components are arranged in sequence: light source 100, condenser 200, first lens 300 (convex lens), circular turntable 410 (film 420), second lens 500 (plano-concave lens), and combined lens 600 (first cemented lens 610 and second cemented lens 620). Along the direction of light 110 propagation, the condenser 200 acts as a first collimating lens, focusing the light 110 and illuminating the first lens 300. The optical center of the light source 100 is placed at the convex lens. The light 110 passes through the condenser 200 and then illuminates the incident surface of the first lens 300, and then refracts from the incident surface to the exit surface. The incident surface of the second lens 500 (plano-concave lens) is a plane, and the exit surface is a concave surface. Furthermore, a Galilean telescope system is constructed using the first lens 300, the second lens 500, and the combined lens 600 to further compress the divergence angle, reduce the light diffusion arc, obtain a more collimated beam, reduce off-axis rays, and improve image quality. In this embodiment, the focal length ratio of the plano-concave lens and the cemented lens is equal to the aperture ratio, which in turn equals the diffusion angle compression ratio. Those skilled in the art can adjust the ratio according to the performance and size requirements of the luminaire; this embodiment does not impose specific limitations on this.

[0059] The advantages of this invention are that it also solves the image quality defects of imaging different wavelength light sources with the same optical module, compresses the beam divergence angle by using the Galilean beam expander system (Galilean telescope group), eliminates chromatic aberration and spherical aberration by using cemented lenses, optimizes field curvature and distortion, and achieves low-cost, high-perception dynamic projection effect through turntable adjustment. Different projection patterns and projection colors can be switched at will, thereby improving brand benefits, enhancing user experience, and strengthening human-vehicle interaction.

[0060] Finally, the effects of the vehicle-mounted projection light optical system of this application are explained based on experimental data and tables. Please refer to [link / reference]. Figure 3 , Figure 3 The example shown is an optical quality assessment, illustrating the relative transmission capability of ray 110 across various spatial frequency components. Figure 4 The distortion diagram of the ray 110 in this application is shown, and the distortion of the ray 110 is relatively small. Further, taking an example with four film plates 420, Figure 5 This is the first projection image of film 420 and related performance analysis. Figure 6 This is a projection image of the second film, 420, along with related performance analysis. Figure 7 This is the projection diagram of the third film, 420, and related performance analysis. Figure 8The projection diagram of the fourth film 420 and related performance analysis show that all four films 420 have efficient and clear projection imaging, and the chromatic aberration and spherical aberration of each projection diagram are small, resulting in high image quality. It should be noted that this embodiment simply sets four English letters. In actual projection use, other patterns can also be used. This embodiment does not make specific limitations on this.

[0061] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived from the claims of this utility model. To provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0062] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0063] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0064] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0065] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0066] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An optical system for vehicle-mounted projection lighting, characterized in that, include: A light source, said light source for emitting light including at least one color; further comprising a first lens, a switchable projection lens group, and a second lens arranged sequentially at intervals along the emission direction of said light; wherein The switchable projection lens group includes a plurality of projection lenses arranged at intervals in a tiled manner. Each projection lens is arranged perpendicular to the optical axis of the light source and includes a projection pattern. The incident surface of each projection lens faces the light source and the first lens, and the exit surface faces the second lens. Furthermore, the switchable projection lens group can switch lenses relative to the light source. When the switchable projection lens group is stationary relative to the light source, the geometric center of one of the projection lenses coincides with the optical axis of the light source. and When the light source emits light, the optical axis of the light rays passes sequentially through the geometric center of the first lens, the geometric center of one of the projection lenses, and the geometric center of the second lens.

2. The vehicle-mounted projection lamp optical system as described in claim 1, characterized in that, The switchable projection lens assembly includes a movable turntable, which is rotatably disposed between the first lens and the second lens along the direction of light emission; wherein The movable turntable can rotate along an axis parallel to the optical axis of the light source, and a plurality of projection lenses are evenly and spaced along its own rotation direction on the movable turntable; and When the movable turntable is stationary relative to the rotating axis, one projection lens on the movable turntable is opposite to the first lens, and the geometric center of the projection lens coincides with the optical axis of the light source.

3. The vehicle-mounted projection lamp optical system as described in claim 2, characterized in that, The movable turntable is a circular turntable that rotates around the rotating axis; wherein The plurality of projection lenses on the circular turntable are evenly and spaced apart around the axis of rotation of the circular turntable, and the central angles subtended by the geometric centers of any two adjacent projection lenses are the same; and The circular turntable has a plurality of circular slots evenly spaced around the rotating axis, and each circular slot contains a projection lens, the projection lens including a film.

4. The vehicle-mounted projection lamp optical system as described in claim 1, characterized in that, The first lens is configured as a convex lens, the convex lens including a first incident surface and a first exit surface; wherein At least one of the first incident surface and the first exit surface is a convex surface, and the light source is directly opposite the first incident surface; and The light source is located at the focal point of the convex lens.

5. The vehicle-mounted projection lamp optical system as described in claim 1, characterized in that, The second lens includes a plano-concave lens, which includes a second incident surface and a second exit surface; wherein The second incident surface is a plane, and the second exit surface is a concave surface.

6. The vehicle-mounted projection lamp optical system as described in claim 1, characterized in that, It also includes a combination lens, which is located downstream of the second lens in the direction of light emission, and the second lens and the combination lens together form the Galilean telescope group.

7. The vehicle-mounted projection lamp optical system as described in claim 6, characterized in that, The combined lens includes a first cemented lens and a second cemented lens bonded together. The first cemented lens is located on the side closer to the light source and is convex on the side facing the light source. The refractive index of the first cemented lens is 1.5168 and the Abbe number is 64.

20. The second cemented lens is located on the side away from the light source and is convex on the side facing away from the light source. The refractive index of the second cemented lens is greater than 1.6 and the Abbe number is less than 50.

8. The vehicle-mounted projection lamp optical system as described in any one of claims 1 to 7, characterized in that, Viewed from one side of the optical axis of the light source, the first lens, the switchable projection lens group, the second lens, and the combined lens are all arranged perpendicular to the optical axis.

9. The vehicle-mounted projection lamp optical system as described in claim 8, characterized in that, It also includes a condenser, which is located between the light source and the first lens in the direction of light emission, with the incident surface of the condenser facing the light source and the exit surface facing the incident surface of the first lens.

10. A vehicle light, comprising a housing, characterized in that, It also includes the vehicle-mounted projection light optical system according to any one of claims 1 to 9, wherein the vehicle-mounted projection light optical system is disposed within the housing.

Images