Projection module, projection vehicle lamp and vehicle
By using three different colors of light sources and optical components in the DLP projection lights, the three-color beams are synthesized and deflected to achieve color projection, which solves the problem that the projection pattern can only be black, white and gray in the prior art, and improves the driver's experience and visual expression of assisted driving functions.
Patent Information
- Application Number
- CN202422112723.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-29
AI Technical Summary
Since the light source of existing DLP projection lights is white, the projected pattern can only be black, white and gray, the information expression dimension is limited, and the driver has a poor experience of assisted driving functions.
Using three different colors of light sources, the three-color beam is synthesized and deflected through the combined prism and mirror assembly, and the color image is enlarged onto the base surface through the projection lens to achieve color projection.
It enriches the image content display effect of projected car lights, improves the driver's experience, and enhances the visual expression of assisted driving functions.
Smart Images
Figure CN222925356U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vehicle projection lamps, and more specifically, to a projection module, a projection vehicle lamp and a vehicle. Background Art
[0002] DLP projection lights are mainly used to provide assisted driving functions for drivers. They can be used to assist the ADB system to improve its safety factor. They can also be used for lane projection, provide road information or warnings to drivers, and assist drivers in understanding the current driving situation and communicating with other drivers. However, since the light source is usually white light, the projected pattern can only be black and white grayscale, which limits the dimension of information expression, resulting in poor driver experience of assisted driving functions such as warnings or early warnings.
[0003] Therefore, how to improve the image display effect of projection lamps has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0004] In view of this, the purpose of the present application is to provide a projection module to improve the image display effect of the projection car lamp.
[0005] Another object of the present application is to provide a projection vehicle lamp having the above-mentioned projection module.
[0006] Another object of the present application is to provide a vehicle having the above-mentioned projection lamp.
[0007] To achieve the above objectives, this application provides the following technical solutions:
[0008] A projection module includes a light source assembly, a reflector assembly, an imaging module and a projection lens, wherein:
[0009] The light source assembly includes a light-combining prism and three light sources respectively arranged in different directions of the light-combining prism, and the light beams emitted by the light sources are different in color. A condenser is arranged between the light source and the light-combining prism, so that the light beams emitted by the light sources are emitted toward the light-combining prism through the condenser;
[0010] The reflector assembly is used to reflect the three-color light beams emitted by the light-combining prism to the imaging module, and the imaging module is used to deflect the three-color light beams to the projection lens so that the projection lens can magnify the image formed by the imaging module onto the base surface.
[0011] Optionally, the above-mentioned projection module also includes a shell, the shell having a front shell and a rear shell relatively arranged, the projection lens can be movably arranged on the front shell, the light source assembly, the reflector assembly and the imaging module are located inside the shell, and a cooling fan is arranged on the rear shell.
[0012] Optionally, in the above projection module, the projection lens includes a lens barrel, a first lens group, and a second lens group. The first lens group and the second lens group are sequentially arranged in the lens barrel along the optical axis from the imaging side to the image source side, and there is a preset gap between the first lens group and the second lens group on the optical axis.
[0013] The first lens group includes a first lens and a second lens, and a first spacer is arranged between the first lens and the second lens.
[0014] The second lens group includes a third lens, a fourth lens, and a fifth lens, and a second spacer is arranged between two adjacent lenses in the second lens group.
[0015] Optionally, in the above projection module, the lens barrel is connected to the front housing through a thread adjustment mechanism, and the thread adjustment mechanism is used to adjust the distance between the projection lens and the imaging module.
[0016] Optionally, in the above projection module, the mirror assembly includes a fixed bracket arranged on the front housing and a free-form surface mirror arranged on the fixed bracket.
[0017] The fixed bracket includes a base and a connecting member arranged on the base, and the connecting member is movably connected to the free-form surface mirror.
[0018] Optionally, in the above projection module, an installation groove for installing the connecting member is formed on the base.
[0019] The connecting member includes a ball head and a reset elastic member abutted against the ball head. The ball head is rotationally matched with the free-form surface mirror to adjust the angle of the free-form surface mirror.
[0020] Optionally, in the above projection module, the condenser includes a first condenser collimating lens and a second condenser collimating lens arranged along the optical axis direction, and the first condenser collimating lens is located on the side close to the light source.
[0021] Optionally, in the above projection module, the light source includes a lamp board and heat dissipation fins arranged on the lamp board.
[0022] A projection headlight includes the projection module as described in any one of the above.
[0023] A vehicle includes the projection headlight as described above.
[0024] The projection module provided by this application projects light beams of different colors emitted by different light sources of the light source assembly onto a beam combining prism from different directions through a condenser respectively, and then the three-color light beams are incident on a mirror assembly through the beam combining prism, reflected by the mirror assembly onto an imaging module, and then the imaging module deflects the three-color light beams to a projection lens according to the image content, and magnifies the image onto a base surface through the projection lens. As can be seen from the above example, the projection module provided by this application can achieve color projection on the basis of black and white gray levels by using three different color light sources, enriching the image content display effect of the projection headlight and improving the driver's experience.
[0025] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily as long as the combined technical features are not contradictory. All feasible feature combinations are the technical contents clearly recorded in this article. Any one of the sub-features included in the same sentence can be applied independently without necessarily being applied together with other sub-features. Brief Description of the Drawings
[0026] In order to more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.
[0027] Figure 1 It is a schematic optical path diagram of the projection module provided by the embodiment of this application;
[0028] Figure 2 It is a schematic structural diagram of the light source assembly provided by the embodiment of this application;
[0029] Figure 3 It is a schematic structural diagram of the projection lens provided by the embodiment of this application;
[0030] Figure 4 It is a schematic structural diagram of the mirror assembly provided by the embodiment of this application;
[0031] Figure 5 It is a schematic assembly diagram of the light source assembly provided by the embodiment of this application;
[0032] Figure 6 It is a schematic structural diagram of the projection module provided by the embodiment of this application.
[0033] Among them, 100 is the light source assembly, 101 is the beam combining prism, 102 is the condenser, 1021 is the first condenser collimating lens, and 1022 is the second condenser collimating lens;
[0034] Reference numeral 200 denotes a mirror assembly, 201 denotes a fixing bracket, 2011 denotes a base, 2012 denotes a connecting member, 2013 denotes a mounting groove, 2014 denotes a ball head, 2015 denotes a reset elastic member, and 202 denotes a free-form surface mirror;
[0035] Reference numeral 300 denotes an imaging module;
[0036] Reference numeral 400 denotes a projection lens, 401 denotes a lens barrel, 402 denotes a first lens group, 4021 denotes a first lens, 4022 denotes a second lens, 4023 denotes a first spacer, 403 denotes a second lens group, 4031 denotes a third lens, 4032 denotes a fourth lens, 4033 denotes a fifth lens, and 4034 denotes a second spacer;
[0037] Reference numeral 500 denotes a housing. Detailed implementation manners
[0038] The core of the present application lies in providing a projection module to improve the image display effect of a projection vehicle lamp.
[0039] Another core of the present application lies in providing a projection vehicle lamp having the above-mentioned projection module.
[0040] Another core of the present application lies in providing a vehicle having the above-mentioned projection vehicle lamp.
[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0042] With the rise of vehicle interconnection and autonomous driving, vehicle lighting is also moving towards intelligence. The DLP projection system is a projection display technology that uses a digital micromirror device (DMD) for optical processing. The DLP projection system can project light in the form of symbols onto the road surface through millions of micromirrors, which helps to provide pioneering driving assistance and driver communication, and can create ideal lighting conditions in various driving situations, thereby minimizing the driving risks of road users at night.
[0043] Traditional DLP projection vehicle headlights mainly provide functions for driver assistance. They can be used to assist the ADB system in improving its safety factor, and can also be used for lane projection to provide road information or warnings to the driver, assisting the driver in understanding the current driving situation and communicating with other drivers. Moreover, the light source usually adopts an automotive-grade white light LED illumination source, and the functions are mainly for auxiliary projection and high-definition illumination during vehicle driving, such as the adaptive anti-glare high beam function. However, since the light source is a white light LED illumination source, the projected pattern can only be black and white grayscale, resulting in limited dimensions for information expression, and thus the driver has a poor experience of the driver assistance functions, such as warnings or alerts.
[0044] For this reason, as Figure 1 shown, an embodiment of the present application discloses a projection module, which includes a light source assembly 100, a mirror assembly 200, an imaging module 300, and a projection lens 400. By using three different color light sources, on the basis of black and white grayscale, color projection can be realized, enriching the image content display effect of the projection vehicle headlights and improving the driver's experience.
[0045] Next, the projection module disclosed in the embodiment of the present application will be specifically explained and described in conjunction with Figures 1 to 6 this.
[0046] Among them, the light source assembly 100 includes a light combining prism 101 and light sources respectively arranged in three different directions of the light combining prism 101, and the light beams emitted by each light source have different colors. A condenser 102 is arranged between the light source and the light combining prism 101 to make the light beam emitted by the light source pass through the condenser 102 and shoot towards the light combining prism 101. When the different color light beams emitted by the different light sources of the light source assembly 100 are respectively shot towards the light combining prism 101 from different directions through the condenser 102, the light combining prism 101 can combine the different color light beams into a single light beam (hereinafter referred to as a three-color light beam), and then the three-color light beam emitted by the light combining prism 101 is reflected to the imaging module 300 through the mirror assembly 200. The imaging module 300 deflects the three-color light beam to the projection lens 400 according to the image content, and the image is enlarged to the base surface through the projection lens 400. It should be noted that the base surface in the above embodiment can be an external plane such as the ground or the wall of the vehicle, or an internal plane such as the roof or the bottom of the vehicle to present the image formed by the imaging module 300.
[0047] In some embodiments, as Figure 2As shown, the light source can adopt an automotive RGB three-color light source, that is, various colors can be displayed through the mixture of three primary colors, red, green, and blue, to adapt to different application scenarios and user needs. Specifically, the red-light path LED light source, green-light path LED light source, and blue-light path LED light source can respectively pass through the condenser 102 and irradiate the light-combining prism 101 from three directions. Then, the three-color light beams are incident on the mirror assembly 200 through the light-combining prism 101, and then accurately reflected onto the imaging module 300 through the mirror assembly 200. The imaging module 300 can adopt a DMD chip micromirror. Then, the imaging module 300 can deflect the three-color light beams onto the projection lens 400 according to the image content, and the image is projected and magnified onto the road surface through the projection lens 400.
[0048] In the above embodiment, in order to improve the collimation of the light beam and reduce the divergence of the light beam, the condenser 102 can adopt a double-lens design, that is, the condenser 102 can include a first condenser collimating lens 1021 and a second condenser collimating lens 1022 arranged along the optical axis direction, and the first condenser collimating lens 1021 is located on the side close to the light source. When the monochromatic light beam is collimated by the first condenser collimating lens 1021, there is still a certain divergence angle for the monochromatic light beam. At this time, the second condenser collimating lens 1022 can further shape and collimate the monochromatic light beam to make it more parallel, so that the divergence angle can be significantly reduced. At the same time, the wavefront error generated by the first condenser collimating lens 1021 can be further corrected by the second condenser collimating lens 1022, making the wavefront of the outgoing light beam flatter and improving the parallelism of the light. In addition, by setting two condenser collimating lenses, spherical aberration and chromatic aberration can be effectively reduced, and the imaging clarity and quality can be improved.
[0049] As Figure 5 and Figure 6 shown, the projection module further includes a housing 500, and the housing 500 has a front shell and a rear shell arranged oppositely. Among them, the projection lens 400 can be movably arranged on the front shell so that the projection lens 400 can be adjusted to achieve projection imaging at different projection distances on the road. At the same time, the light source assembly 100, the mirror assembly 200, and the imaging module 300 are located inside the housing 500.
[0050] In some embodiments, as Figure 5 shown, the light-combining prism 101 can be first glued to the central bracket inside the housing 500. Then, after the condenser 102 and the light source are installed from three directions, the imaging module 300 is fixed from the rear of the housing 500 to form a closely connected whole. Finally, the above parts, the front shell, and the rear shell are combined together to form the projection module of the projection headlight, as Figure 6 shown.
[0051] In some embodiments, the light source includes a lamp board and heat dissipation fins disposed on the lamp board. By providing the heat dissipation fins, the heat dissipation area of the lamp board can be effectively increased, and the heat dissipation efficiency of the lamp board can be improved. Moreover, a heat dissipation fan is provided on the rear case to form a heat dissipation air duct. Thus, through the cooperation of the heat dissipation fins and the heat dissipation air duct, the projection module can be cooled in multiple directions, and the volume of the entire projection module can be reduced.
[0052] In some embodiments, as Figure 3 shown, the projection lens 400 includes a lens barrel 401, a first lens group 402, and a second lens group 403. The first lens group 402 and the second lens group 403 are sequentially disposed in the lens barrel 401 along the optical axis from the imaging side to the image source side. Moreover, a preset gap is provided between the first lens group 402 and the second lens group 403 on the optical axis, which can effectively eliminate aberration and improve the imaging quality. At the same time, the zooming and focusing functions of the projection lens 400 can be realized by adjusting the distance between the first lens group 402 and the second lens group 403. Specifically, the first lens group 402 includes a first lens 4021 and a second lens 4022, and a first spacer 4023 is provided between the first lens 4021 and the second lens 4022 to form a gap between the first lens 4021 and the second lens 4022, which can effectively eliminate the aberration of the first lens group 402 and improve the imaging quality. The second lens group 403 includes a third lens 4031, a fourth lens 4032, and a fifth lens 4033, and a second spacer 4034 is provided between adjacent two lenses in the second lens group 403 to form a gap between the third lens 4031, the fourth lens 4032, and the fifth lens 4033, which can effectively eliminate the aberration of the second lens group 403 and improve the imaging quality.
[0053] In the above embodiment, the lens barrel 401 can also be connected to the front case through a threaded adjustment mechanism. Thus, the distance between the projection lens 400 and the imaging module 300 can be adjusted through the threaded adjustment mechanism to realize the zooming and focusing functions of the projection lens 400 and ensure the clarity of imaging. The threaded adjustment mechanism may include a flange fixedly connected to the front case. The flange is provided with an internal thread, and a focusing section is provided on the lens barrel 401. The focusing section of the lens barrel 401 is provided with an external thread. By mating the external thread of the lens barrel 401 with the internal thread of the flange, the axial movement of the projection lens 400 can be realized, and further the zooming and focusing functions of the projection lens 400 can be realized.
[0054] As Figure 4As shown in the figure, the mirror assembly 200 includes a fixed bracket 201 disposed on the front housing and a free-form surface mirror 202 disposed on the fixed bracket 201. Specifically, the fixed bracket 201 includes a base 2011 and a connecting member 2012 disposed on the base 2011. The connecting member 2012 is movably connected to the free-form surface mirror 202, so as to realize the angle adjustment of the free-form surface mirror 202 to meet the optical requirements. At the same time, by using the free-form surface mirror 202, the optical path can be simplified and the volume of the projection module can be reduced.
[0055] In some embodiments, as Figure 4 shown in the figure, an installation groove 2013 for installing the connecting member 2012 is formed on the base 2011. The connecting member 2012 includes a ball head 2014 and a reset elastic member 2015 that abuts against the ball head 2014. The ball head 2014 is rotatably engaged with the free-form surface mirror 202 to adjust the angle of the free-form surface mirror 202. The reset elastic member 2015 can be a compression spring, so that under the elastic force of the compression spring, the ball head 2014 is pressed against the free-form surface mirror 202 to ensure the stability of the free-form surface mirror 202 when adjusting the angle.
[0056] In the projection module provided by the present application, the light beams of different colors emitted by different light sources of the light source assembly 100 are respectively projected onto the light combining prism 101 from different directions through the condenser 102, and then the three-color light beams are incident on the mirror assembly 200 through the light combining prism 101, reflected by the mirror assembly 200 onto the imaging module 300, and then the imaging module 300 deflects the three-color light beams to the projection lens 400 according to the image content, and magnifies the image onto the base surface through the projection lens 400. From the above example, it can be seen that in the projection module provided by the present application, by using three different color light sources, on the basis of black and white gray levels, color projection can be realized, enriching the image content display effect of the projection vehicle lamp and improving the driver's experience.
[0057] The embodiment of the present application also discloses a projection vehicle lamp, including a projection module, and the projection module is the projection module disclosed in the above embodiment, so it has all the technical effects of the above projection module, which will not be elaborated herein.
[0058] The embodiment of the present application also discloses a vehicle, including the projection vehicle lamp disclosed in the above embodiment, so it has all the technical effects of the above projection vehicle lamp, which will not be elaborated herein.
[0059] In the description and claims of this application and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.
[0060] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A projection module, characterized in that: It comprises a light source assembly (100), a reflector assembly (200), an imaging module (300) and a projection lens (400), wherein: The light source assembly (100) comprises a light combining prism (101) and three light sources arranged in different directions on the light combining prism (101), wherein light beams emitted by the light sources have different colors, and a condenser (102) is arranged between the light sources and the light combining prism (101), so that the light beams emitted by the light sources are emitted toward the light combining prism (101) through the condenser (102); The reflector assembly (200) is used to reflect the three-color light beam emitted by the light-combining prism (101) to the imaging module (300), and the imaging module (300) is used to deflect the three-color light beam to the projection lens (400), so that the projection lens (400) magnifies the image formed by the imaging module (300) onto the base surface.
2. The projection module according to claim 1, characterized in that: The invention also comprises a housing (500), the housing (500) comprising a front housing and a rear housing which are arranged opposite to each other, the projection lens (400) being movably arranged on the front housing, the light source assembly (100), the reflector assembly (200) and the imaging module (300) being located inside the housing (500), and a heat dissipation fan being arranged on the rear housing.
3. The projection module according to claim 2, characterized in that: The projection lens (400) comprises a lens barrel (401), a first lens group (402) and a second lens group (403); the first lens group (402) and the second lens group (403) are sequentially arranged in the lens barrel (401) from the imaging side to the image source side along the optical axis, and the first lens group (402) and the second lens group (403) have a preset gap on the optical axis; The first lens group (402) comprises a first lens (4021) and a second lens (4022), and a first isolation member (4023) is provided between the first lens (4021) and the second lens (4022); The second lens group (403) comprises a third lens (4031), a fourth lens (4032) and a fifth lens (4033), and a second isolation member (4034) is provided between two adjacent lenses in the second lens group (403).
4. The projection module according to claim 3, characterized in that: The lens barrel (401) is connected to the front shell via a threaded adjustment mechanism, and the threaded adjustment mechanism is used to adjust the distance between the projection lens (400) and the imaging module (300).
5. The projection module according to claim 2, characterized in that: The reflector assembly (200) comprises a fixing bracket (201) arranged on the front shell and a free-form surface reflector (202) arranged on the fixing bracket (201); The fixed support (201) comprises a base (2011) and a connecting piece (2012) arranged on the base (2011), and the connecting piece (2012) and the free-form surface reflector (202) are movably connected.
6. The projection module according to claim 5, characterized in that: The base (2011) is provided with a mounting groove (2013) for mounting the connecting member (2012); The connecting member (2012) comprises a ball head (2014) and a resetting elastic member (2015) abutting against the ball head (2014); the ball head (2014) and the free-form surface reflector (202) are rotationally matched to adjust the angle of the free-form surface reflector (202).
7. The projection module according to claim 1, characterized in that: The condenser (102) comprises a first condensing collimating lens (1021) and a second condensing collimating lens (1022) arranged along the optical axis direction, and the first condensing collimating lens (1021) is located on a side close to the light source.
8. The projection module according to any one of claims 1 to 7, characterized in that: The light source includes a lamp board and heat dissipation fins arranged on the lamp board.
9. A projection vehicle lamp, characterized in that: It comprises the projection module as described in any one of claims 1 to 8.
10. A vehicle, characterized in that: Comprising the projection vehicle lamp as claimed in claim 9.