Multi-angle projection type vehicle-mounted DLP projection lamp and automobile

Abstract

The utility model provides a multi-angle projection type vehicle-mounted DLP projection lamp and an automobile, and relates to the technical field of vehicle-mounted projection lamps. Optical axes output by a first light source and a second light source are parallel, and an optical axis output by a third light source is perpendicular to an optical axis output by the first light source; output light of the first light source, the second light source and the third light source passes through the collimating lens group and then enters the lens array through the beam splitter group, and light passing through the lens array enters the relay lens group; and light rays penetrating out of the relay lens group enter the prism, are subjected to light ray turning, enter the DMD element, are reflected by the DMD element, enter the prism and then enter the projection lens group through the prism. And finally, the image is projected to a projection surface, the color projection pattern is formed by using the persistence of vision of human eyes through RGB time sequence lightening, the light path is stable, and the diversity of the projection lamp and the adaptability to the scene can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted projection lamps, and specifically, to a multi-angle projection vehicle-mounted DLP projection lamp and an automobile. Background Art

[0002] Current requirements for vehicle headlights are becoming more and more diverse, gradually evolving from traditional lighting to intelligent vehicle lights, and also need to be able to provide more functions such as interaction and entertainment. Projection areas required for different functions are different.

[0003] DLP is the abbreviation of "Digital Light Processing", that is, digital light processing. That is to say, this technology needs to first digitally process the image signal and then project the light.

[0004] Current requirements for the shape of automobiles make vehicle headlights more and more compact. In order to save space, vehicle headlights must integrate different functions into the same optical device. The common multiplexing method for current vehicle headlights is to combine daytime running lights with position lights or brake lights with position lights. They use the same optical structure and light source and realize different functions by controlling the current; another form is to use the same structure but different light sources, such as the multiplexing of daytime running lights and turn signals.

[0005] The Chinese patent application document with the publication number of CN220551818U discloses a DLP signal projection lamp that realizes function multiplexing, which relates to the technical field of signal projection lamps and is applicable to the lighting of vehicle carriers, including a DLP signal projection lamp main body; the DLP signal projection lamp main body has a projection function and a signal lamp function. The DLP signal projection lamp main body includes a housing, an RGB collimating lens group, an LED light source, a TIR direct lens, a relay lens, a DMD component, a reflector, a projection lens, a DLP projection module and a signal lamp module. The outer surface of the housing is fixedly connected to the outer surface of the RGB collimating lens group, and the inner surface of the housing is detachably connected to the outer surface of the LED light source.

[0006] The projection lamps in the prior art have poor diversity and poor adaptability to scenarios, and there are areas for improvement. Summary of the Utility Model

[0007] Aiming at the defects in the prior art, the purpose of the utility model is to provide a multi-angle projection vehicle-mounted DLP projection lamp and an automobile.

[0008] A multi - angle projection vehicle DLP projection lamp and an automobile according to the present utility model include a first light source, a second light source, a third light source, a collimating lens group, a beam splitting film group, a lens array, a relay lens group, a prism, a DMD element, and a projection lens group; the optical axes of the light output by the first light source and the second light source are parallel, the optical axis of the light output by the third light source is perpendicular to the optical axis of the light output by the first light source, and the output lights of the first light source, the second light source, and the third light source respectively pass through the collimating lens group and then enter the lens array through the beam splitting film group, and the light passing through the lens array enters the relay lens group; the light exiting from the relay lens group enters the prism, where the light is refracted and enters the DMD element, is reflected by the DMD element and enters the prism again, and then enters the projection lens group from the prism.

[0009] Preferably, the collimating lens group includes a first collimating lens and a second collimating lens, and the first collimating lens and the second collimating lens are arranged at intervals on the same optical axis.

[0010] Preferably, the beam splitting film group includes a first beam splitting film and a second beam splitting film, the first light source is a red light source, the second light source is a blue light source, and the third light source is a green light source; the first beam splitting film is arranged at the intersection of the irradiation paths of the first light source and the third light source, and the first beam splitting film allows green light to pass through and reflects red light and blue light; the second beam splitting film is arranged at the intersection of the irradiation paths of the second light source and the third light source, and the second beam splitting film allows blue light to pass through and reflects red light and green light.

[0011] Preferably, the first beam splitting film forms an angle of 45° with the optical axis of the first light source, and the second beam splitting film forms an angle of 45° with the optical axis of the second light source.

[0012] Preferably, the incident surface of the lens array is located on the path where the second light source and the second beam splitting film are located, and the lens array can make a small displacement to compensate for the optical axis offset caused by the second beam splitting film.

[0013] Preferably, the prism is a total reflection prism, and the inclined surface of the prism faces the relay lens group.

[0014] Preferably, the relay lens group includes a first relay lens and a second relay lens arranged at intervals.

[0015] Preferably, the DMD element includes a plurality of micromirrors that can be individually controlled to flip in two different directions.

[0016] Preferably, the incident surface of the projection lens group is close to the exit surface of the prism, and the incident surface of the projection lens group and the exit surface of the prism are on the same optical axis.

[0017] An automobile according to the present utility model has a DLP projection lamp installed on it.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model collimates light through a collimating lens group. The collimated light enters a lens array through a beam splitting sheet group for light homogenization, and then enters a prism through a relay lens group to achieve light turning. It cooperates with a DMD element to receive and emit light from the illumination optical path. After total reflection by the prism, the light enters a projection lens. The projection lens is placed behind the light exit surface of the prism, and finally projects an image onto a projection surface. By lighting in RGB sequence and utilizing the visual persistence characteristic of the human eye, a color projection pattern is formed. The optical path is stable, which helps to improve the diversity of projection lamps and the adaptability to scenes.

[0020] 2. Due to the optical effect, the beam splitting mirror group, as a parallel glass plate, will cause the central light to be displaced. If the lens array makes the same displacement compensation, it can ensure that the central light passes through the center of the lens array. It only needs to fix the lens array at the displaced position during the structural design. Description of the Drawings

[0021] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objectives, and advantages of the utility model will become more obvious:

[0022] Figure 1 It is a schematic diagram of the overall structure of the DLP projection lamp mainly embodied by the utility model;

[0023] Figure 2 It is a schematic diagram of the structure mainly embodying the illumination optical path of the utility model.

[0024] Reference Signs:

[0025] First light source 1 Lens array 8

[0026] Second light source 2 First relay lens 9

[0027] Third light source 3 Second relay lens 10

[0028] First collimating lens 4 Prism 11

[0029] Second collimating lens 5 DMD element 12

[0030] First beam splitting sheet 6 Projection lens group 13

[0031] Second beam splitting sheet 7 Detailed Embodiments

[0032] The present utility model will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several changes and improvements can still be made. These all belong to the protection scope of the present utility model.

[0033] As Figure 1 shown, a multi-angle projection type vehicle-mounted DLP projection lamp and an automobile according to the present utility model include a first light source 1, a second light source 2, a third light source 3, a collimating lens group, a beam splitting prism group, a lens array 8, a relay lens group, a prism 11, a DMD element 12, and a projection lens group 13. The optical axes of the light output by the first light source 1 and the second light source 2 are parallel, the optical axis of the light output by the third light source 3 is perpendicular to the optical axis of the light output by the first light source 1, and the output lights of the first light source 1, the second light source 2, and the third light source 3 respectively pass through the collimating lens group and then enter the lens array 8 through the beam splitting prism group. The light passing through the lens array 8 enters the relay lens group. The light exiting the relay lens group enters the prism 11 and undergoes a light ray turning to enter the DMD element 12, is reflected by the DMD element 12 and enters the prism 11, and then enters the projection lens group 13 from the prism 11.

[0034] The technical solution of this application collimates the light through the collimating lens group. The collimated light enters the lens array 8 through the beam splitting prism group for light homogenization, and then enters the prism 11 through the relay lens group to achieve light ray turning. It cooperates with the DMD element 12 to receive and emit the light from the illumination optical path, and after total reflection by the prism 11, enters the projection lens. The projection lens is placed behind the light exit surface of the prism 11, and finally projects the image onto the projection surface. By lighting in RGB sequence, a color projection pattern is formed by utilizing the visual persistence characteristic of the human eye. The optical path is stable, which helps to improve the diversity of the projection lamp and the adaptability to the scene.

[0035] Specifically, the first light source 1 is a red light source, the second light source 2 is a blue light source, and the third light source 3 is a green light source. The collimating lens group includes a first collimating lens 4 and a second collimating lens 5, and the first collimating lens 4 and the second collimating lens 5 are arranged at intervals on the same optical axis. With the help of the first collimating lens 4 and the second collimating lens, the light is made more concentrated, thereby improving the brightness and clarity of the light. And during installation, by adjusting the distance and position of the two lenses, aberration phenomena such as field curvature and spherical aberration can be eliminated, and chromatic aberration can also be reduced.

[0036] More specifically, the beam splitting prism group includes a first beam splitting prism 6 and a second beam splitting prism 7. The first beam splitting prism 6 is arranged at the junction of the irradiation paths of the first light source 1 and the third light source 3. The first beam splitting prism 6 allows green light to pass through and reflects red light and blue light. The second beam splitting prism 7 is arranged at the junction of the irradiation paths of the second light source 2 and the third light source 3. The second beam splitting prism 7 allows blue light to pass through and reflects red light and green light. The first beam splitting prism 6 forms an angle of 45° with the optical axis of the first light source 1, and the second beam splitting prism 7 forms an angle of 45° with the optical axis of the second light source 2.

[0037] As Figure 1 and Figure 2 shown, more specifically, the incident surface of the lens array 8 is located on the path where the second light source 2 and the second beam splitting prism 7 are located, and the lens array 8 can make a small displacement to compensate for the optical axis offset caused by the second beam splitting prism 7. The main function of the lens array 8 is to homogenize the light. By setting that the lens array 8 can make a small displacement to compensate for the optical axis offset caused by the second beam splitting prism 7, it can adapt to more working scenarios. When light passes through the beam splitting mirror group, due to the optical effect, the beam splitting mirror group, as a parallel glass plate, will cause the central light ray to have a displacement. If the lens array 8 makes the same displacement compensation, it can ensure that the central light ray passes through the center of the lens array 8, and only needs to fix the lens array 8 at the displaced position during the structural design.

[0038] Furthermore, the relay lens group is located behind the lens array 8. The relay lens group includes a first relay lens 9 and a second relay lens 10 arranged at intervals. The prism 11 is placed behind the second relay lens 10 for light ray turning. The prism 11 is a total reflection prism 11, and the inclined surface of the prism 11 faces the relay lens group.

[0039] The DMD element 12 includes a plurality of micromirrors that can be individually controlled to flip in two different directions. The DMD element 12 is placed behind the prism 11 and is used to receive and reflect the light rays from the illumination optical path. The incident surface of the projection lens group 13 is close to the exit surface of the prism 11, and the incident surface of the projection lens group 13 and the exit surface of the prism 11 are on the same optical axis.

[0040] According to an automobile provided by the present invention, the DLP projection lamp is installed on the automobile. The DLP projection lamp of the present application can cooperate with a preset image correction algorithm to implement angle and pattern correction schemes for two modes of preset wall projection and ground projection. The vehicle-mounted computer selects the scenario of wall projection or ground projection, and the vehicle body end gives a signal for the vehicle lamp to perform angle and pattern correction, which solves the problem of pattern deformation during projection at different angles and saves components.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0042] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

Claims

1. A multi-angle projection vehicle-mounted DLP projection lamp, characterized in that It includes a first light source (1), a second light source (2), a third light source (3), a collimating lens group, a beam splitter group, a lens array (8), a relay lens group, a prism (11), a DMD element (12), and a projection lens group (13); The optical axes of the light output by the first light source (1) and the second light source (2) are parallel, the optical axis of the light output by the third light source (3) is perpendicular to the optical axis of the light output by the first light source (1), and the output lights of the first light source (1), the second light source (2), and the third light source (3) respectively pass through the collimating lens group and then enter the lens array (8) through the beam splitter group, and the light passing through the lens array (8) enters the relay lens group; The light emerging from the relay lens group enters the prism (11) and undergoes a light ray turn to enter the DMD element (12), is reflected by the DMD element (12) and enters the prism (11), and then enters the projection lens group (13) from the prism (11).

2. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, wherein The collimating lens group includes a first collimating lens (4) and a second collimating lens (5), and the first collimating lens (4) and the second collimating lens (5) are spaced apart on the same optical axis.

3. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, wherein The beam splitter group includes a first beam splitter (6) and a second beam splitter (7), the first light source (1) is a red light source, the second light source (2) is a blue light source, and the third light source (3) is a green light source; The first beam splitter (6) is arranged at the junction of the irradiation paths of the first light source (1) and the third light source (3), and the first beam splitter (6) allows green light to pass through and reflects red light and blue light; The second beam splitter () is arranged at the junction of the irradiation paths of the second light source (2) and the third light source (3), and the second beam splitter (7) allows blue light to pass through and reflects red light and green light.

4. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 3, wherein, The first beam splitter (6) forms an angle of 45° with the optical axis of the first light source (1), and the second beam splitter (7) forms an angle of 45° with the optical axis of the second light source (2).

5. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 3, wherein The incident surface of the lens array (8) is located on the path where the second light source (2) and the second beam splitter (7) are located, and the lens array (8) can make a small displacement to compensate for the optical axis offset caused by the second beam splitter (7).

6. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, wherein The prism (11) is a total reflection prism (11), and the inclined surface of the prism (11) faces the relay lens group.

7. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, wherein The relay lens group includes a first relay lens (9) and a second relay lens (10) arranged at intervals.

8. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, characterized in that, The DMD element (12) includes a plurality of micromirrors that can be individually controlled to flip in two different directions.

9. The multi-angle projection vehicle-mounted DLP projection lamp according to claim 1, wherein The incident surface of the projection lens group (13) is close to the exit surface of the prism (11), and the incident surface of the projection lens group (13) and the exit surface of the prism (11) are on the same optical axis.

10. A vehicle, characterized in that, Using the multi-angle projection type vehicle-mounted DLP projection lamp according to any one of claims 1-9, the DLP projection lamp is installed on an automobile.

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