Vehicle-mounted projection lamp and vehicle device

Abstract

The invention discloses a vehicle-mounted projection lamp and a vehicle device, and relates to the technical field of vehicle lamps, the vehicle-mounted projection lamp comprises a light source, a condensing lens, an object space pattern light blocking piece and a projection lens, and a hollowed-out area or a non-hollowed-out area in the object space pattern light blocking piece forms an object space pattern; a beam of parallel light is converged by the light emitting surface of the projection lens and then is transmitted by the light incident surface of the projection lens to be focused on a first focus, and the first focus is located on the surface, facing the projection lens, of the object space pattern light barrier; therefore, light emitted by the light source is converged by the condensing lens, then penetrates through the object space pattern light barrier, then penetrates through the light incident surface of the projection lens, is converged to the central area of the light emergent surface of the projection lens, and is finally projected out from the light emergent surface of the projection lens, so that an image space projection pattern is formed, and the projection pattern is high in illumination and high in definition; the projection part is only provided with a layer of projection lens, so that the number of parts is small, the size chain is small, the manufacturing difficulty is low, the cost is low, the loss is small, the efficiency is high and the error controllability is high.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle lamps, and in particular to a vehicle-mounted projection lamp and a vehicle device. Background Art

[0002] With the development of the automobile industry, users' demand for personalized vehicle configuration and human-vehicle interaction experience has shown a significant growth trend. Among them, automobile ground symbol projection technology, as an innovative application example, is becoming more and more popular. Automobile ground symbol projection technology was originally introduced to the market as a decorative element to highlight the owner's personality and enhance vehicle recognition. However, with the continuous iteration and optimization of technology, this technology has gradually been integrated into multiple functional areas such as vehicle active safety systems, driving assistance information and entertainment interaction, achieving a leapfrog development from personalized accessories to functional components. In current automobile manufacturing and design practices, ground symbol projection technology is widely used to provide intuitive driving path guidance, emergency braking warning, lane departure warning and other key safety information, effectively enhancing the driver's perception of the vehicle's surrounding environment and potential risks, thereby significantly improving the level of driving safety. At the same time, this technology can also customize the display of personalized welcome information, vehicle status prompts and other interactive content according to the driver's preferences and needs, further enriching the dimension and depth of human-vehicle interaction and optimizing the driving experience.

[0003] In order to better promote the popularization of automobile ground symbol projection function, this application has developed a low-cost and high-performance vehicle-mounted projection lamp design. Summary of the invention

[0004] In order to better promote the popularization of the vehicle ground symbol projection function, the embodiment of the present application provides a low-cost and high-performance vehicle-mounted projection lamp and a vehicle device including the vehicle-mounted projection lamp.

[0005] To achieve the above objectives, the present application provides the following technical solutions:

[0006] A vehicle-mounted projection lamp comprises a light source, a condenser lens, an object-side pattern light shielding sheet and a projection lens which are sequentially arranged along a light path transmission direction;

[0007] The object-side pattern light-blocking sheet includes a hollow area and a non-hollow area, and the hollow area or the non-hollow area constitutes an object-side pattern;

[0008] The projection lens comprises a light incident surface and a light exit surface which are arranged opposite to each other along the transmission direction of the light path, and the light exit surface of the projection lens is a convex surface; a beam of parallel light is incident on the light exit surface of the projection lens, converged by the light exit surface of the projection lens, and then focused on a first focal point after being transmitted through the light incident surface of the projection lens, and the first focal point is located on the surface of the object side pattern light shielding sheet facing the projection lens;

[0009] The light emitted by the light source is converged by the condensing lens, passes through the hollow area of ​​the object-side pattern light blocking film, and then transmits through the light incident surface of the projection lens, converges to the central area of ​​the light exit surface of the projection lens, and is finally projected out from the light exit surface of the projection lens to form an image-side projection pattern of the object-side pattern.

[0010] Optionally, a thickness d of the projection lens along the light path transmission direction satisfies: 20 mm ≤ d ≤ 60 mm.

[0011] Optionally, a side surface of the projection lens is provided with a plurality of annular sawtooth structures arranged along the light path transmission direction, and the annular sawtooth structure includes a first annular tooth surface and a second annular tooth surface that are intersected and connected.

[0012] Optionally, the annular serration structure is a convex structure, the second annular tooth surface is located on the side of the first annular tooth surface close to the light emitting surface of the projection lens, the length of the second annular tooth surface in the first section is smaller than the length of the first annular tooth surface in the first section, and the first section is a plane passing through the optical axis of the projection lens.

[0013] Optionally, the light incident surface of the projection lens is a spherical surface or an ellipsoidal surface, and the center of curvature of the light incident surface of the projection lens is located at the geometric center of the light exit surface of the projection lens.

[0014] Optionally, the surface of the object-side patterned light shield facing the condensing lens is a high-brightness reflective surface, and the surface of the object-side patterned light shield facing the projection lens is a black frosted surface.

[0015] Optionally, there are at least two light sources and at least two focusing lenses, and the light sources and the focusing lenses correspond one to one.

[0016] Optionally, the light source is a light emitting diode.

[0017] Optionally, the focusing lens is made of polymethyl methacrylate or polycarbonate, and the projection lens is made of polymethyl methacrylate or polycarbonate.

[0018] A vehicle device comprises any one of the above-mentioned vehicle-mounted projection lamps.

[0019] Compared with the prior art, the above technical solution has the following advantages:

[0020] The vehicle-mounted projection lamp provided in the embodiment of the present application includes a light source, a focusing lens, an object-side pattern light blocking sheet and a projection lens which are sequentially arranged along the transmission direction of the light path; wherein the object-side pattern light blocking sheet includes a hollow area and a non-hollow area, and the hollow area or the non-hollow area constitutes an object-side pattern; the projection lens includes a light incident surface and a light exit surface which are relatively arranged along the transmission direction of the light path, and the light exit surface of the projection lens is a convex surface, so that a beam of parallel light is incident on the light exit surface of the projection lens, converged by the light exit surface of the projection lens, and then transmitted through the light incident surface of the projection lens, and then focused on a first focal point, that is, the convergence effect of the projection lens on the parallel light incident on the light exit surface is mainly realized by the light exit surface of the projection lens, and the convergence focus of the projection lens and the convergence focus of the light exit surface of the projection lens are almost coincident; in this way, the light emitted by the light source is converged by the focusing lens, and then passes through the hollow area of ​​the object-side pattern light blocking sheet, and then transmits through the light incident surface of the projection lens, and can be converged to the projection lens. The central area of ​​the light-emitting surface of the shadow lens is finally projected from the light-emitting surface of the projection lens; and the first focus is located on the surface of the object-side pattern light-blocking sheet facing the projection lens, or in other words, the focal plane of the projection lens, that is, the surface of the object-side pattern light-blocking sheet facing the projection lens; in this way, the projection lens can project the object-side pattern formed by the hollow area or non-hollow area in the object-side pattern light-blocking sheet to form an image-side projection pattern; in summary, the light emitted by the light source is converged by the focusing lens, and then passes through the hollow area of ​​the object-side pattern light-blocking sheet, and then transmits through the light-incident surface of the projection lens, converges to the central area of ​​the light-emitting surface of the projection lens, and is finally projected from the light-emitting surface of the projection lens to form an image-side projection pattern of the object-side pattern, so that the image-side projection pattern has high illumination and high clarity, and the projection part has only one layer of lens, the projection lens, which not only has fewer parts and fewer size chains, low manufacturing difficulty and low cost, but also has less loss, high optical efficiency and high error controllability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the side structure of a vehicle-mounted projection lamp provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the oblique structure of a vehicle-mounted projection lamp provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the side cross-sectional structure of a vehicle-mounted projection lamp provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of light transmission after a beam of parallel light is incident on the light-emitting surface of a projection lens is shown;

[0026] Figure 5 A schematic side cross-sectional diagram of a ray tracing of a vehicle-mounted projection lamp provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a pattern projected by a vehicle-mounted projection lamp provided in an embodiment of the present application.

[0028] Reference numerals:

[0029] 400-light source; 300-condensing lens; 200-object side pattern light shield; 100-projection lens; 210-hollow area; 220-non-hollow area; 101-light exit surface; 102-light entrance surface; X-light path transmission direction; 103-annular sawtooth structure; S1-first annular tooth surface; S2-second annular tooth surface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The present application is described in detail with reference to the schematic diagrams. When describing the embodiments of the present application in detail, for the sake of convenience, the drawings showing the optical structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] The projection part of the common vehicle-mounted projection lamps on the market is generally realized by a reflector or a lens group. The inventor has found that for the vehicle-mounted projection lamp using a reflector for the projection part, the clarity of the pattern projected onto the ground is not enough; for the vehicle-mounted projection lamp using a lens group for the projection part, although the clarity of the projection pattern is good, since the lens group is composed of a plurality of lenses, the manufacturing cycle is long, the price is relatively high, and the illumination of the pattern projected onto the ground is insufficient and the brightness is low.

[0033] In view of this, in order to better promote the popularization of the automobile ground symbol projection function, the embodiment of the present application provides a low-cost and high-performance vehicle-mounted projection lamp design.

[0034] Figure 1 FIG. 1 shows a schematic diagram of a side view structure of a vehicle-mounted projection lamp provided in an embodiment of the present application. Figure 2 The figure shows a schematic diagram of the oblique structure of a vehicle-mounted projection lamp provided in an embodiment of the present application. Figure 3 FIG. 4 shows a schematic diagram of a side cross-sectional structure of a vehicle-mounted projection lamp provided in an embodiment of the present application. Figure 1-Figure 3 As shown, the vehicle-mounted projection lamp provided in the embodiment of the present application includes a light source 400, a condenser lens 300, an object-side patterned light shielding sheet 200 and a projection lens 100 which are sequentially arranged along the light path transmission direction X.

[0035] like Figure 1-Figure 3 As shown, the object-side pattern light blocking sheet 200 includes a hollow area 210 and a non-hollow area 220 , and the hollow area 210 constitutes an object-side pattern, or the non-hollow area 220 constitutes an object-side pattern.

[0036] like Figure 1-Figure 3 As shown, the projection lens 100 includes a light incident surface 102 and a light emitting surface 101 which are arranged opposite to each other along the light transmission direction X, and the light emitting surface 101 of the projection lens 100 is a convex surface. Figure 4 FIG. 1 shows a schematic diagram of light transmission after a beam of parallel light is incident on the light exiting surface 101 of the projection lens 100. Figure 1-Figure 4 As shown, a beam of parallel light is incident on the light emitting surface 101 of the projection lens 100, converged by the light emitting surface 101 of the projection lens 100, and then focused on the first focus F after being transmitted through the light incident surface 102 of the projection lens 100. The first focus F is located on the surface 201 of the object side pattern light blocking film 200 facing the projection lens 100.

[0037] It can be understood that the light-emitting surface 101 of the projection lens 100 is a convex surface, and therefore, the light-emitting surface 101 of the projection lens 100 will converge the parallel light rays that are incident from the light-emitting surface 101 of the projection lens 100. In the embodiment of the present application, the light-entering surface 102 of the projection lens 100 mainly plays a matching role, and hardly changes the transmission direction of the light, or changes the transmission direction of the light very little. It can be seen that the light-emitting surface 101 of the projection lens 100 is the core focusing surface of the projection lens 100, and the convergence effect of the projection lens 100 on the parallel light rays that are incident from its light-emitting surface 101 is mainly achieved by the light-emitting surface 101 of the projection lens 100, that is, the convergence focus of the projection lens 100 and the convergence focus of the light-emitting surface 101 of the projection lens 100 are almost coincident.

[0038] So set up, such as Figure 5 As shown, Figure 5A schematic side cross-sectional diagram of the ray tracing of a vehicle-mounted projection lamp provided in an embodiment of the present application is shown, and it can be seen that the light emitted by the light source 400 is converged by the focusing lens 300, passes through the hollow area 210 of the object-side patterned light blocking film 200, and then passes through the light incident surface 102 of the projection lens 100, and can be converged to the central area of ​​the light exit surface 101 of the projection lens 100, and finally projected from the light exit surface 101 of the projection lens 100.

[0039] Furthermore, since the first focus F is located on the surface 201 of the object side pattern light blocking film 200 facing the projection lens 100, that is, the focal plane of the projection lens 100, i.e., the surface 201 of the object side pattern light blocking film 200 facing the projection lens 300, the projection lens 100 can project the object side pattern formed by the hollow area 210 or the non-hollow area 220 in the object side pattern light blocking film 200 to form an image side projection pattern.

[0040] It can be understood that the focusing lens 300 is a focusing convex lens, which has a function of focusing the light emitted by the light source 400 .

[0041] It can also be understood that if the hollow area 210 in the object-side pattern light blocking film 200 constitutes an object-side pattern, the bright area in the projection formed is the image-side projection pattern; if the non-hollow area 220 in the object-side pattern light blocking film 200 constitutes an object-side pattern, the dark area in the projection formed is the image-side projection pattern.

[0042] To summarize, the light emitted by the light source 400 is converged by the focusing lens 300, passes through the hollow area 210 of the object-side pattern light blocking film 200, and then passes through the light incident surface 102 of the projection lens 100, converges to the central area of ​​the light exit surface 101 of the projection lens 100, and is finally projected out from the light exit surface 101 of the projection lens 100 to form an image-side projection pattern of the object-side pattern.

[0043] It should be noted that if the light source 400 is an ideal point light source, the light emitted by the light source 400 is converged by the condenser lens 300, and then passes through the hollow area 210 of the object-side pattern light shielding sheet 200, and then passes through the light incident surface 102 of the projection lens 100, and will be converged to the geometric center of the light exit surface 101 of the projection lens 100. In actual applications, since the light source 400 has a certain volume, the light emitted by the light source 400 is converged by the condenser lens 300, and then passes through the hollow area 210 of the object-side pattern light shielding sheet 200, and then passes through the light incident surface 102 of the projection lens 100, and converges to the central area of ​​the light exit surface 101 of the projection lens 100.

[0044] The vehicle-mounted projection lamp provided in the embodiment of the present application can improve the illumination of the image-side projection pattern because the light emitted by the light source 400 is converged by the condensing lens 300, then passes through the hollow area 210 of the object-side pattern light blocking film 200, and then transmits through the light incident surface 102 of the projection lens 100, and converges to the central area of ​​the light exit surface 101 of the projection lens 100; and because the surface 201 of the object-side pattern light blocking film 200 facing the projection lens 300 is the focal plane of the projection lens 100, the clarity of the image-side projection pattern can be improved; thus, the image-side projection pattern has high illumination and clarity, and the road surface illumination can reach 1000 lx~2000 lx.

[0045] Compared with the vehicle-mounted projection lamp in the prior art whose projection part adopts a lens group, since each lens of the lens group has two optical surfaces, namely the incident surface and the exit surface, each optical surface is a medium interface. According to the Fresnel formula, each time the light passes through a medium interface, there will be interface reflection loss, and stray light will be generated, and the optical loss is serious. Although coating each medium interface can reduce the loss, it will greatly increase the cost. In the vehicle-mounted projection lamp provided in the embodiment of the present application, the projection part only adopts the projection lens 100, which not only has fewer parts and less dimensional chains, but also has low manufacturing difficulty and low cost, and also has less loss, high optical efficiency and high error controllability.

[0046] Optionally, in some embodiments of the present application, such as Figure 1 and Figure 3 As shown, the thickness d of the projection lens 100 along the optical transmission direction X satisfies: 20mm≤d≤60mm, optionally, d=40mm, that is, the projection lens 100 is a thick lens, so that it is easy to realize that the parallel light rays incident from the light output surface 101 of the projection lens 100 are converged through the light output surface 101 of the projection lens 100, and then transmitted through the light incident surface 102 of the projection lens 100, and the focused first focal point F is located on the surface 201 of the object side pattern light blocking film 200 facing the projection lens 300.

[0047] It should be noted that since the light emitting surface 101 of the projection lens 100 is a convex surface and the light incident surface 102 of the projection lens 100 is also a curved surface, in the embodiment of the present application, the thickness d of the projection lens 100 along the light path transmission direction X is the maximum distance between the light emitting surface 101 of the projection lens 100 and the light incident surface 102 of the projection lens 100 along the light path transmission direction X, that is, the maximum thickness of the projection lens 100 along the light path transmission direction X.

[0048] Further optionally, in some embodiments of the present application, such as Figure 1-Figure 3As shown, the side of the projection lens 100 is provided with a plurality of annular sawtooth structures 103 arranged along the light path transmission direction X, and the annular sawtooth structure 103 includes a first annular tooth surface S1 and a second annular tooth surface S2 that are intersected and connected; this is because the light emitted by the light source 400 is incident on the projection lens 100 after passing through the condenser lens 300 and the object-side pattern light blocking film 200, and part of the light (i.e., stray light) incident on the projection lens 100 may be projected onto the side of the projection lens 100. In this embodiment, a plurality of annular sawtooth structures 103 arranged along the light path transmission direction X are provided on the side of the projection lens 100, so as to utilize the first annular tooth surface S1 and / or the second annular tooth surface S2 of the annular sawtooth structure 103 to reflect and refract the stray light projected onto the side of the projection lens 100, so that the stray light is emitted to the outside of the projection lens 100 instead of being emitted from the light emitting surface 101, so as to avoid affecting the image-side projection pattern.

[0049] Further optionally, in some embodiments of the present application, such as Figure 1-Figure 3 As shown, the annular sawtooth structure 103 is a convex structure, that is, it convexes in the direction away from the projection lens 100, that is, the connection angle between the first annular tooth surface S1 and the second annular tooth surface S2 of the annular sawtooth structure 103 convexes in the direction away from the projection lens 100. In this way, while the annular sawtooth structure 103 is used to dissipate stray light, the annular sawtooth structure 103 can be prevented from affecting the main light passing through the projection lens 100.

[0050] Alternatively, in some embodiments of the present application, the annular sawtooth structure 103 may also be a concave structure, that is, the connection angle of the first annular tooth surface S1 and the second annular tooth surface S2 of the annular sawtooth structure 103 faces the inside of the projection lens 100. In this way, while the stray light is dissipated by the annular sawtooth structure 103, the volume of the projection lens 100 is reduced, thereby saving materials and costs. However, it should be noted that the height of the annular sawtooth structure 103 needs to be controlled to avoid affecting the main light passing through the inside of the projection lens 100.

[0051] On the basis that the annular sawtooth structure 103 is a convex structure, optionally, in some embodiments of the present application, such as Figure 1-Figure 3 As shown, the second annular tooth surface S2 is located on the side of the first annular tooth surface S1 close to the light exit surface 101 of the projection lens 100, the length of the second annular tooth surface S2 in the first section is smaller than the length of the first annular tooth surface S1 in the first section, and the first section is a plane passing through the optical axis OO of the projection lens 100; with such an arrangement, along the optical path transmission direction X, the stray light in the projection lens 100 is mainly incident on the second annular tooth surface S2, and the second annular tooth surface S2 receives the stray light and refracts the received stray light to the outside of the projection lens 100, thereby preventing the stray light from being emitted from the light exit surface 101, that is, eliminating the stray light.

[0052] As is known above, the light incident surface 102 of the projection lens 100 mainly plays a matching role, and hardly changes the transmission direction of the light, and will have a small change in the transmission direction of the light. Based on this, optionally, in some embodiments of the present application, such as Figure 1-Figure 3 As shown, the light incident surface 102 of the projection lens 100 is a spherical surface or an ellipsoidal surface, and the center of curvature of the light incident surface 102 of the projection lens 100 is located at the geometric center of the light exit surface 101 of the projection lens 100; with such an arrangement, when the parallel light rays incident normally on the light exit surface 101 of the projection lens 100 are converged by the light exit surface 101 of the projection lens 100 and then pass through the light incident surface 102 of the projection lens 100, the transmission direction of the light rays is hardly changed by the light incident surface 102 of the projection lens 100; when the light rays emitted from the light source 400 are converged by the condensing lens 300 and then pass through the hollow area 210 of the object-side patterned light blocking film 200 and then pass through the light incident surface 102 of the projection lens 100, the transmission direction of the light rays is hardly changed by the light incident surface 102 of the projection lens 100.

[0053] Based on any of the above embodiments, optionally, in some embodiments of the present application, reference Figure 1-Figure 3 As shown, the surface 202 of the object-side patterned light shielding sheet 200 facing the condenser lens 300 is a high-brightness reflective surface, and the surface 201 of the object-side patterned light shielding sheet 200 facing the projection lens 300 is a black frosted surface.

[0054] Optionally, the object side pattern light blocking film 200 can be a metal sheet, and one side surface of the object side pattern light blocking film 200 can be polished or aluminum-coated to make the surface of this side a high-brightness reflective surface, and the other side surface of the object side pattern light blocking film 200 can be coated to make the other side surface a black matte surface.

[0055] It can be understood that the surface 201 of the object-side pattern light blocking film 200 facing the projection lens 300 is a black frosted surface, that is, the surface 201 of the non-hollow area 220 in the object-side pattern light blocking film 200 facing the projection lens 300 is a black frosted surface. In this way, the black frosted surface can be used to diffusely reflect light and dissipate stray light, which is beneficial to improving the clarity of the image-side projection pattern.

[0056] It can also be understood that the surface 202 of the object side pattern light blocking film 200 facing the focusing lens 300 is a high-brightness reflective surface, that is, the surface 202 of the non-hollow area 220 of the object side pattern light blocking film 200 facing the focusing lens 300 is a high-brightness reflective surface, so that the high-brightness reflective surface can be used to reflect the light emitted by the light source 400 through the focusing lens 300 to illuminate the non-hollow area 220 of the object side pattern light blocking film 200, thereby avoiding the object side pattern light blocking film 200 from absorbing more light and causing the temperature to rise significantly, especially when the object side pattern light blocking film 200 is a metal sheet, it can avoid the metal sheet from absorbing more light and causing the temperature to rise significantly, thereby reducing the temperature of the metal sheet.

[0057] Based on any of the above embodiments, optionally, in some embodiments of the present application, in the vehicle-mounted projection lamp, Figure 1-Figure 3 As shown, there are at least two light sources 400 and at least two condenser lenses 300, and the light sources 400 correspond to the condenser lenses 300 one by one. It can be understood that the number and power of the light sources 400 can be set according to the shape and illumination requirements of the target pattern to be projected, and the light sources 400 correspond to the condenser lenses 300 one by one, so that the light sources 400 and the condenser lenses 300 can be flexibly arranged.

[0058] Optionally, the light source 400 is a light emitting diode (LED). As we know, LEDs as light sources 400 have a very fast response speed and can reach maximum brightness in a short time; they have relatively low energy consumption, usually around 20W; and they have a longer lifespan, usually up to 50,000 hours or even more, which means that they hardly need to be replaced throughout the service life of the vehicle, thereby reducing maintenance costs.

[0059] Optionally, the material of the condenser lens 300 is polymethyl methacrylate (PMMA) or polycarbonate (PC), and the material of the projection lens 100 is polymethyl methacrylate (PMMA) or polycarbonate (PC). As we know, polymethyl methacrylate (PMMA) and polycarbonate (PC) are widely used transparent plastic materials, so the preparation process of the condenser lens 300 and the projection lens 100 is mature and the cost is low.

[0060] Figure 6 The schematic diagram of the pattern projected by a vehicle-mounted projection lamp provided in the embodiment of the present application is shown. It can be seen that the projection pattern has high illumination and high definition. It should be noted that: Figure 6 The projection pattern is a rectangle for demonstration only as an example, and the present application does not limit the shape of the projection pattern.

[0061] Based on the same inventive concept, an embodiment of the present application further provides a vehicle device, which includes the vehicle-mounted projection lamp provided by any of the above embodiments, for example, as a reversing projection lamp.

[0062] Since the vehicle-mounted projection lamp has been described in detail in the above embodiments, it will not be described again here.

[0063] The various parts in this manual are described in a combination of parallel and progressive ways. Each part focuses on the differences from other parts, and the same or similar parts between the various parts can be referenced to each other.

[0064] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle-mounted projection lamp, characterized in that: It includes a light source, a condenser lens, an object side pattern light shielding sheet and a projection lens which are sequentially arranged along the light path transmission direction; The object-side pattern light-blocking sheet includes a hollow area and a non-hollow area, and the hollow area or the non-hollow area constitutes an object-side pattern; The projection lens comprises a light incident surface and a light exit surface which are arranged opposite to each other along the transmission direction of the light path, and the light exit surface of the projection lens is a convex surface; a beam of parallel light is incident on the light exit surface of the projection lens, converged by the light exit surface of the projection lens, and then focused on a first focal point after being transmitted through the light incident surface of the projection lens, and the first focal point is located on the surface of the object side pattern light shielding sheet facing the projection lens; The light emitted by the light source is converged by the condensing lens, passes through the hollow area of ​​the object-side pattern light blocking film, and then transmits through the light incident surface of the projection lens, converges to the central area of ​​the light exit surface of the projection lens, and is finally projected out from the light exit surface of the projection lens to form an image-side projection pattern of the object-side pattern.

2. The vehicle-mounted projection lamp according to claim 1, characterized in that: The thickness d of the projection lens along the light path transmission direction satisfies: 20 mm≤d≤60 mm.

3. The vehicle-mounted projection lamp according to claim 2, characterized in that: A plurality of annular sawtooth structures are arranged along the light path transmission direction on the side surface of the projection lens, and the annular sawtooth structure includes a first annular tooth surface and a second annular tooth surface that are intersected and connected.

4. The vehicle-mounted projection lamp according to claim 3, characterized in that: The annular serration structure is a convex structure, the second annular tooth surface is located on the side of the first annular tooth surface close to the light emitting surface of the projection lens, the length of the second annular tooth surface in the first section is smaller than the length of the first annular tooth surface in the first section, and the first section is a plane passing through the optical axis of the projection lens.

5. The vehicle-mounted projection lamp according to claim 1, characterized in that: The light incident surface of the projection lens is a spherical surface or an ellipsoidal surface, and the center of curvature of the light incident surface of the projection lens is located at the geometric center of the light exit surface of the projection lens.

6. The vehicle-mounted projection lamp according to claim 1, characterized in that: The surface of the object-side patterned light shielding sheet facing the condenser lens is a high-brightness reflective surface, and the surface of the object-side patterned light shielding sheet facing the projection lens is a black frosted surface.

7. The vehicle-mounted projection lamp according to claim 1, characterized in that: There are at least two light sources and at least two condensing lenses, and the light sources and the condensing lenses correspond to each other one by one.

8. The vehicle-mounted projection lamp according to any one of claims 1 to 7, characterized in that: The light source is a light emitting diode.

9. The vehicle-mounted projection lamp according to any one of claims 1 to 7, characterized in that: The material of the condensing lens is polymethyl methacrylate or polycarbonate, and the material of the projection lens is polymethyl methacrylate or polycarbonate.

10. A vehicle device, characterized in that: The vehicle-mounted projection lamp comprises the vehicle-mounted projection lamp as described in any one of claims 1 to 9.

Images