Projection light machine and vehicle

Abstract

The invention provides a projection light machine and a vehicle, and relates to the field of projection equipment. The projection light machine comprises a light source assembly and an imaging structure which are sequentially arranged along a projection light path. The light source assembly emits light to the imaging structure, and at least part of the light penetrates through the imaging structure along the projection light path to form projection light; the projection ray machine further comprises at least one stray light absorption structure which is used for absorbing stray light from the light source assembly. Interference of stray light on projection light propagating along the projection light path can be reduced, and the imaging effect of the projection light machine is improved.

Description

Technical Field

[0001] The present application relates to the field of projection equipment, and in particular to projection optical machines and vehicles. Background Art

[0002] With the continuous development of projection technology, projection optical machines are increasingly widely used in the fields of vehicles and homes. Projection optical machines include light source components and imaging structures arranged in sequence along the projection optical path to achieve the imaging process of the projection optical machine.

[0003] However, during the use of the projection light machine, the projection light machine is prone to generate stray light that does not propagate along the projection light path, and the imaging effect of the projection light machine is poor. Summary of the invention

[0004] The embodiments of the present application provide a projection optical machine and a vehicle to solve the problem that the projection optical machine is prone to generate stray light that does not propagate along the projection light path, resulting in poor imaging effect of the projection optical machine.

[0005] The embodiment of the present application provides a projection optical machine, comprising a light source assembly and an imaging structure sequentially arranged along a projection optical path;

[0006] The light source assembly emits light to the imaging structure, and at least part of the light passes through the imaging structure along the projection light path to form projection light;

[0007] The projection light engine further includes at least one stray light absorption structure, and the stray light absorption structure is used to absorb stray light from the light source assembly.

[0008] By adopting the above technical solution, the projection light machine includes a light source assembly and an imaging structure arranged in sequence along the projection light path. During the use of the projection light machine, the light source assembly can emit light to the imaging structure, and at least part of the light can pass through the imaging structure along the projection light path to form projection light, thereby enabling imaging of the projection light machine to be achieved through projection light.

[0009] During the use of the projection light machine, part of the light emitted by the light source assembly will deviate from the projection light path and form stray light. The stray light absorption structure of the projection light machine is used to absorb the stray light from the light source assembly that does not propagate along the projection light path, thereby reducing the interference of stray light on the projection light propagating along the projection light path and improving the imaging effect of the projection light machine.

[0010] In some possible implementations, the light source assembly includes a light source, and a light emitting side of the light source is arranged toward the imaging structure.

[0011] In some possible implementations, the light source assembly includes a plurality of light sources and a dichroic mirror assembly, and the light source emits light to the dichroic mirror assembly along the projection light path;

[0012] The dichroic mirror assembly is used for combining the light from the plurality of light sources to form composite light, and allowing the composite light to propagate along the projection light path toward the imaging structure.

[0013] In some possible implementations, the plurality of light sources include a first light source and a second light source.

[0014] In some possible implementations, the dichroic mirror assembly includes a dichroic mirror.

[0015] In some possible implementations, the first light source is disposed on a first surface side of the dichroic mirror.

[0016] In some possible implementations, the second light source is disposed on the second surface side of the dichroic mirror.

[0017] In some possible implementations, the stray light absorption structure is disposed on the second surface side of the dichroic mirror.

[0018] In some possible implementations, the light incident side of the stray light absorbing structure is arranged toward the second surface of the dichroic mirror.

[0019] In some possible implementations, the plurality of light sources include a first light source, a second light source, and a third light source.

[0020] In some possible implementations, the dichroic mirror assembly includes a first dichroic mirror.

[0021] In some possible implementations, the first light source is disposed on a first surface side of the first dichroic mirror.

[0022] In some possible implementations, the second light source is disposed on a second surface side of the first dichroic mirror.

[0023] In some possible implementations, the dichroic mirror assembly includes a second dichroic mirror, and a first surface of the second dichroic mirror is disposed toward the first light source.

[0024] In some possible implementations, the second surface of the second dichroic mirror is disposed toward the third light source.

[0025] In some possible implementations, the first dichroic mirror and the second dichroic mirror are arranged at intervals.

[0026] In some possible implementations, the second surface of the first dichroic mirror is arranged opposite to the first surface of the second dichroic mirror.

[0027] In some possible implementations, the second light source and the third light source are arranged at intervals.

[0028] In some possible implementations, the second light source is disposed between the first dichroic mirror and the second dichroic mirror.

[0029] In some possible implementations, a light emitting direction of the first light source is perpendicular to a light emitting direction of the second light source.

[0030] In some possible implementations, a light emitting direction of the second light source is parallel to a light emitting direction of the third light source.

[0031] In some possible implementations, the first light source, the second light source, and the third light source have different light emission wavelengths;

[0032] The first light source emits light of a first wavelength, the second light source emits light of a second wavelength, and the third light source emits light of a third wavelength.

[0033] In some possible implementations, along the projection light path, the light of the first wavelength passes through the first dichroic mirror and is reflected by the second dichroic mirror before propagating toward the imaging structure.

[0034] In some possible implementations, along the projection light path, the light of the second wavelength is reflected by the first dichroic mirror, and then propagates toward the imaging structure after being reflected by the second dichroic mirror.

[0035] In some possible implementations, along the projection light path, the light of the third wavelength passes through the second dichroic mirror and then propagates toward the imaging structure.

[0036] In some possible implementations, the stray light absorption structure includes a first light absorption structure;

[0037] The light incident side of the first light absorption structure is arranged toward the first surface of the first dichroic mirror.

[0038] In some possible implementations, the first light absorption structure absorbs the first wavelength light reflected by the first dichroic mirror.

[0039] In some possible implementations, the first light absorption structure absorbs the second wavelength light that passes through the first dichroic mirror.

[0040] In some possible implementations, the stray light absorption structure includes a second light absorption structure;

[0041] The light incident side of the second light absorbing structure is arranged toward the second surface of the second dichroic mirror.

[0042] In some possible implementations, the second light absorption structure absorbs the first wavelength light and the second wavelength light transmitted through the second dichroic mirror.

[0043] In some possible implementations, the second light absorption structure absorbs the third wavelength light reflected by the second dichroic mirror.

[0044] In some possible implementations, the light source is configured as an inorganic light emitting diode.

[0045] In some possible implementations, the imaging structure includes a first imaging component and a second imaging component.

[0046] In some possible implementations, the first imaging component includes a polarizing beam splitter, and a first surface of the polarizing beam splitter faces the light source component.

[0047] In some possible implementations, the second surface of the polarizing beam splitter faces the second imaging component.

[0048] In some possible implementations, the polarizing beam splitter is configured to be in a sheet shape.

[0049] In some possible implementations, the polarizing beam splitter includes a polarizing beam splitting film, and a material of the polarizing beam splitting film is one of a metal wire grid, an organic material, and an inorganic material.

[0050] In some possible implementations, along the projection light path, the polarizing beam splitter is used to transmit a first portion of polarized light in the light from the light source assembly, and allow the first portion of polarized light to propagate toward the second imaging assembly.

[0051] In some possible implementations, the first imaging component further includes a wave plate, and the wave plate is used to reflect the light from the polarizing beam splitter.

[0052] In some possible implementations, the stray light absorption structure includes a third light absorption structure, and the third light absorption structure is used to absorb the second portion of polarized light after being reflected by the polarization beam splitter.

[0053] In some possible implementations, a light incident side of the third light absorbing structure faces the first surface of the polarizing beam splitter.

[0054] In some possible implementations, the first imaging component includes a collimation corrector.

[0055] In some possible implementations, a radius of curvature of the collimation corrector is greater than or equal to 51 mm and less than or equal to 56 mm.

[0056] In some possible implementations, the thickness of the collimation corrector is greater than or equal to 1 mm and less than or equal to 3 mm.

[0057] In some possible implementations, the first imaging component includes a first aperture and a second aperture.

[0058] In some possible implementations, an opening size of the first aperture is larger than an opening size of the second aperture.

[0059] In some possible implementations, the second imaging component is located on a first side of the first imaging component.

[0060] In some possible implementations, along the projection light path, the second imaging component and the light source component are located at opposite ends of the first imaging component.

[0061] In some possible implementations, when the stray light absorption structure includes a first light absorption structure, the first light absorption structure is located on a first side of the first imaging component.

[0062] In some possible implementations, when the stray light absorption structure includes a first light absorption structure, the first light absorption structure is located at one end of the first imaging component close to the light source component.

[0063] In some possible implementations, when the stray light absorption structure includes a second light absorption structure, the second light absorption structure is located on the second side of the first imaging component.

[0064] In some possible implementations, when the stray light absorption structure includes a second light absorption structure, the second light absorption structure is located at an end of the first imaging component close to the light source component.

[0065] In some possible implementations, the third light absorption structure is located on the second side of the first imaging component.

[0066] In some possible implementations, the third light absorption structure is located at an end of the first imaging component away from the light source component.

[0067] In some possible implementations, the stray light absorption structure includes a container, and the container forms a reflective cavity.

[0068] In some possible implementations, the reflective cavity is used to deflect the stray light to increase an incident angle of the stray light in the reflective cavity.

[0069] In some possible implementations, at least a portion of the cavity wall of the reflective cavity is provided with a reflective groove, and the reflective groove is used to increase the incident angle of the stray light.

[0070] In some possible implementations, the stray light absorption structure further includes a reflective sheet, and the reflective sheet is disposed in the reflective cavity.

[0071] In some possible implementations, the stray light absorbing structure includes a one-way light-transmitting element;

[0072] The one-way light-transmitting member is used to absorb stray light toward the reflective cavity and block light propagating from the reflective cavity toward the projection light path.

[0073] In some possible implementations, the one-way light-transmitting element is configured such that the transmittance of light with a large incident angle is lower than the transmittance of light with a small incident angle.

[0074] In some possible implementations, the number of the stray light absorbing structures is set to be multiple, and the reflection cavities of at least two of the stray light absorbing structures are connected.

[0075] In some possible implementations, the projection light engine further includes a housing.

[0076] In some possible implementations, the light source assembly and the imaging structure are disposed on the housing.

[0077] In some possible implementations, the shell is reused to form at least a portion of the stray light absorption structure.

[0078] In some possible implementations, the shell is provided with a first partition plate, and the first partition plate is used to form a portion of the container.

[0079] In some possible implementations, the first surface of the first partition plate and the shell form the reflective cavity.

[0080] In some possible implementations, the second surface of the first partition plate and the shell form a mounting cavity, and the mounting cavity is used to accommodate a portion of the imaging structure.

[0081] In some possible implementations, a reflective groove is disposed on the first surface of the first partition plate, and the reflective groove is used to increase the incident angle of the stray light.

[0082] In some possible implementations, the shell is provided with a second partition plate, and the second partition plate is used to form a portion of the container.

[0083] In some possible implementations, the first surface of the second partition plate and the first part of the shell form a reflective cavity.

[0084] In some possible implementations, a reflective groove is disposed on the first surface of the second partition plate.

[0085] In some possible implementations, the second surface of the second partition plate and the second part of the shell form another reflective cavity.

[0086] In some possible implementations, the second surface of the second partition plate is provided with a reflective groove.

[0087] An embodiment of the present application provides a vehicle, comprising the above-mentioned projection light machine.

[0088] Since the vehicle includes any one of the above-mentioned projection light machines, the advantages of the vehicle including any one of the above-mentioned projection light machines can be specifically referred to the relevant description above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0090] Figure 1 A schematic diagram of the structure of a projection optical machine provided in an embodiment of the present application;

[0091] Figure 2 A schematic diagram of the structure of a projection optical machine with a light source provided in an embodiment of the present application;

[0092] Figure 3 A schematic diagram of the structure of a projection optical machine having a first light source and a second light source provided in an embodiment of the present application;

[0093] Figure 4 A schematic structural diagram of a light source assembly having a first light source and a second light source and a stray light absorption structure provided in an embodiment of the present application;

[0094] Figure 5 A schematic diagram of the structure of a projection optical machine having a first light source, a second light source and a third light source provided in an embodiment of the present application;

[0095] Figure 6 A schematic diagram of the structure of a light source assembly having a first light source, a second light source and a third light source provided in an embodiment of the present application;

[0096] Figure 7 A schematic diagram of the structure of the first imaging component and the second imaging component provided in an embodiment of the present application;

[0097] Figure 8 A schematic diagram of the principle of the light homogenizer provided in the embodiment of the present application;

[0098] Fig. 9 A schematic diagram of a light beam with a large incident angle incident on a light homogenizing element provided in an embodiment of the present application;

[0099] Fig.10A schematic diagram of the principle of the wave plate provided in the embodiment of the present application;

[0100] Fig.11 A schematic diagram of the structure of a projection optical machine including multiple stray light absorption structures provided in an embodiment of the present application;

[0101] Fig.12 A schematic diagram of the transmittance and incident angle of a one-way light-transmitting element provided in an embodiment of the present application;

[0102] Fig.13 A schematic diagram of a stray light absorption structure including multiple openings provided in an embodiment of the present application.

[0103] Description of reference numerals:

[0104] 100. Light source assembly;

[0105] 110, light source; 110a, first light source; 110b, second light source; 110c, third light source; 120, collimator; 130, dichroic mirror; 130a, first dichroic mirror; 130b, second dichroic mirror;

[0106] 200, a first imaging component;

[0107] 210, polarizer; 220, collimation correction element; 230, light homogenizer; 240, shaping lens; 250, aperture group; 251, first aperture; 252, second aperture; 260, polarizing beam splitter; 270, wave plate; 280, terminal polarizer;

[0108] 300, LCOS chip;

[0109] 400, a second imaging component;

[0110] 500, Stray light absorption structure;

[0111] 500a, a first light absorption structure; 500b, a second light absorption structure; 500c, a third light absorption structure;

[0112] 510, receiving member; 511, reflecting cavity; 512, reflecting groove; 520, reflecting sheet; 530, one-way light-transmitting member;

[0113] 600, housing;

[0114] 610, first partition plate; 620, second partition plate; 630, installation cavity.

[0115] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0116] As described in the background art, in the related art, a projection optical machine includes a light source assembly and an imaging structure arranged in sequence along a projection optical path to realize the imaging process of the projection optical machine. The light source assembly may include multiple light sources and a dichroic mirror, and the light source emits light to the dichroic mirror along the projection optical path. The dichroic mirror can transmit part of the light and reflect part of the light according to factors such as the wavelength of the light, so that the multiple dichroic mirrors can combine the light from multiple light sources to form a composite light, and make the composite light propagate along the projection optical path to the imaging structure, thereby realizing the light combining process of multiple light sources through the dichroic mirror.

[0117] For example, multiple light sources can be used to emit light of different wavelengths. Along the projection light path, the dichroic mirror can reflect the light from the first part of the light source, and the dichroic mirror can transmit the light from the second part of the light source, so that the propagation direction of the light from the first part of the light source can be changed by the dichroic mirror, so that the light from the multiple light sources can be combined to form a composite light.

[0118] Furthermore, the imaging structure may include a polarizing beam splitter (PBS) which can transmit the composite light from the light source assembly along the projection light path and transform the composite light into projection light, thereby realizing the projection process of the projection light machine.

[0119] However, since the light emitted by multiple light sources may have overlapping spectrum bands, different light sources may produce some light with overlapping wavelengths. For example, along the projection light path, the dichroic mirror reflects the light from the first part of the light source, but some of the light generated by the first part of the light source may pass through the dichroic mirror; the dichroic mirror transmits the light from the second part of the light source, but some of the light generated by the second part of the light source may be reflected by the dichroic mirror.

[0120] In addition, part of the composite light from the light source assembly will not pass through the polarizing beam splitter, but will be reflected by the polarizing beam splitter. In other words, the light from the first light source that passes through the dichroic mirror, the light from the second light source that is reflected by the dichroic mirror, and part of the composite light from the light source assembly that is reflected by the polarizing beam splitter will not propagate along the projection light path, and will form stray light that is different from the projection light.

[0121] It is easy to understand that during the use of the projection light machine, the projection light machine is prone to generate stray light that does not propagate along the projection light path, and the propagation direction and wavelength of the stray light are difficult to control, making the projection light propagating along the projection light path easily affected by the stray light, resulting in poor imaging effect of the projection light machine.

[0122] In order to solve the above-mentioned technical problems, an embodiment of the present application provides a projection light machine and a vehicle. The projection light machine includes a light source assembly and an imaging assembly arranged in sequence along a projection light path. During the use of the projection light machine, the light source assembly can emit light to the imaging structure, and at least part of the light can pass through the imaging structure along the projection light path to form projection light, thereby enabling imaging of the projection light machine to be achieved through projection light.

[0123] During the use of the projection light machine, part of the light emitted by the light source assembly will deviate from the projection light path and form stray light. The stray light absorption structure of the projection light machine is used to absorb the stray light from the light source assembly that does not propagate along the projection light path, thereby reducing the interference of stray light on the projection light propagating along the projection light path and improving the imaging effect of the projection light machine.

[0124] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0125] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0126] Reference Figure 1 The embodiment of the present application provides a projection optical machine, including a light source assembly 100 and an imaging structure arranged in sequence along a projection optical path (i.e., the optical path indicated by the solid line in the figure). The light source assembly 100 emits light to the imaging structure, and at least part of the light passes through the imaging structure along the projection optical path to form projection light, thereby realizing the projection process of the projection optical machine.

[0127] The projection light machine also includes at least one stray light absorption structure 500, which is used to absorb stray light from the light source assembly 100 and not propagating along the projection light path (i.e., the light represented by the dotted line in the figure), so as to reduce the interference of the stray light on the projection light propagating along the projection light path and improve the imaging effect of the projection light machine.

[0128] Exemplarily, the projection optical machine can be set as a silicon-based liquid crystal projection optical machine (Liquid Crystal on Silicon, referred to as LCOS), and the silicon-based liquid crystal chip is a micro display device used in display technology. It combines the characteristics of liquid crystal display technology and silicon-based integrated circuits, and has the advantages of high resolution, excellent image quality, miniaturization and high flexibility.

[0129] In some possible implementations, the light source assembly 100 may include a light source 110. The number of the light source 110 may be set to at least one.

[0130] For example, refer to Figure 2 The number of light sources 110 can be set to one, and the light emitting side of the light source is set toward the imaging structure. The light source 110 can emit light to the imaging component so that the light can pass through the imaging component to form projection light. The projection light machine can be used to form monochromatic projection light on the projection surface.

[0131] For example, refer to Figure 3 The number of the light sources 110 can be set to be multiple, the light source assembly 100 can include a dichroic mirror assembly, the dichroic mirror assembly includes a dichroic mirror 130 (Dichroic Mirror), and the light source 110 can emit light to the dichroic mirror 130 along the projection light path.

[0132] Exemplarily, the light source assembly 100 is configured as an inorganic light emitting diode type light source assembly 100. For example, the light source 110 can be selected from one or more of an inorganic light emitting diode (Light Emitting Diode, referred to as LED), a mini light emitting diode (Mini Light Emitting Diode, referred to as Mini LED) and a micro light emitting diode (Micro Light Emitting Diode, referred to as Micro LED).

[0133] It should be noted that, compared with other types of light-emitting elements, the light source assembly 100 is set as an inorganic light-emitting diode type light source assembly 100. The light source assembly 100 has higher impact resistance and reliability. The light source assembly 100 can be applied to more application scenarios, ensuring the normal use of the light source assembly 100.

[0134] The light source assembly 100 includes a plurality of light sources 110 and a dichroic mirror assembly. The light source 110 emits light along the projection light path toward the dichroic mirror assembly.

[0135] As a new energy-saving light source 110, inorganic light-emitting diodes are compact and inexpensive compared to traditional light sources 110. When used as projection light sources 110, there is no need to extract basic colors from white light. Inorganic light-emitting diodes are surface light sources 110 and can be regarded as a collection of countless point light sources 110, so their luminous intensity is approximately equal in all directions.

[0136] Reference Figure 2 and Figure 3 Exemplarily, the light source assembly 100 may include a collimator 120. Along the projection light path, the collimator 120 may be disposed between the light source 110 and the dichroic mirror 130, so that the light emitted by the light source 110 can propagate toward the dichroic mirror 130 along the projection light path through the collimator 120.

[0137] The collimator 120 may be configured as one or more of a compound parabolic concentrator (CPC), a collimating lens, and a total internal reflection lens (TIR).

[0138] For example, the collimator 120 can be configured as a collimating lens to reduce the volume of the collimator 120 , so that the collimator 120 can be applicable to more types of projection light machines, and can also make the light spot formed by the light source 110 and passing through the collimator 120 more uniform, thereby improving the lighting effect of the light source assembly 100 .

[0139] The collimator 120 can shape the light from the light source 110 to change the divergence angle or convergence angle of the light, so that the light can propagate along the projection light path, reducing the possibility of the light deviating from the projection light path.

[0140] Exemplarily, the dichroic mirror 130 of the light source assembly 100 can at least be used to combine light from multiple light sources 110 to form composite light, and make the composite light propagate along the projection light path to the imaging structure, thereby realizing the process of combining light of different wavelengths from multiple light sources 110.

[0141] The dichroic mirror 130 , also called a dichroic mirror or a dichroic mirror, is a common optical element that can be used to reflect or transmit light according to the wavelength or color of the light.

[0142] For example, the dichroic mirror 130 may be designed to reflect light within a specific wavelength range while transmitting light of other wavelengths, thereby enabling the diversion of light to achieve regulation of the light propagation process.

[0143] Reference Figure 4In some possible implementations, along the projection light path, the dichroic mirror 130 reflects the light from the first partial light source 110 , and the dichroic mirror 130 transmits the light from the second partial light source 110 , thereby being able to change the propagation direction of the light from the first partial light source 110 through the dichroic mirror 130 .

[0144] The position of the dichroic mirror 130 can be adjusted according to the positions and light emission directions of the multiple light sources 110 , so that the dichroic mirror 130 can deflect the light from the first part of the light sources 110 , thereby combining the light from different light sources 110 to form composite light.

[0145] Reference Figure 3 and Figure 4 For example, the plurality of light sources 110 may include a first light source 110a and a second light source 110b having different light emission wavelengths. The first light source 110a emits light of a first wavelength, and the second light source 110b emits light of a second wavelength, and the first wavelength light and the second wavelength light can be combined to form composite light.

[0146] A first surface of the dichroic mirror 130 is disposed toward the first light source 110 a , and a second surface of the dichroic mirror 130 is disposed toward the second light source 110 b .

[0147] The light emitting direction of the first light source 110a can be set perpendicular to the light emitting direction of the second light source 110b, and the angle between the light emitting direction of the first light source 110a and the dichroic mirror 130 can be set to 45 degrees, and the angle between the light emitting direction of the second light source 110b and the dichroic mirror 130 can be set to 45 degrees.

[0148] The first light source 110a can be configured as the first partial light source 110, and along the projection light path, the first wavelength light is reflected by the dichroic mirror 130 and propagates toward the imaging structure. The second light source 110b can be configured as the second partial light source 110, and along the projection light path, the second wavelength light is transmitted through the dichroic mirror 130 and propagates toward the imaging structure.

[0149] like Figure 4 As shown, the dichroic mirror 130 can be tilted and has a first surface and a second surface opposite to the first surface. The first light source 110a can be disposed on the first surface side of the dichroic mirror 130, and the second light source 110b can be disposed on the second surface side of the dichroic mirror 130.

[0150] When light passes through the dichroic mirror 130, the light may propagate from the side where the first surface of the dichroic mirror 130 is located to the side where the second surface of the dichroic mirror 130 is located. Alternatively, the light may propagate from the side where the second surface of the dichroic mirror 130 is located to the side where the first surface of the dichroic mirror 130 is located.

[0151] Exemplarily, the first surface of the dichroic mirror 130 faces left and upward, and the second surface of the dichroic mirror 130 faces right and downward. The first light source 110a is disposed on the left side of the dichroic mirror 130, and the first light source 110a emits light to the first surface of the dichroic mirror 130. The second light source 110b is disposed on the lower side of the dichroic mirror 130, and the second light source 110b emits light to the second surface of the dichroic mirror 130.

[0152] When the light source assembly 100 is in operation, the first light source 110a emits a first wavelength of light to the right toward the dichroic mirror 130, and the dichroic mirror 130 reflects the first wavelength of light from the first light source 110a, so that the first wavelength of light can be reflected by the dichroic mirror 130 and then propagate upward to form projection light.

[0153] The second light source 110b emits a second wavelength light upward toward the dichroic mirror 130. The dichroic mirror 130 transmits the second wavelength light from the second light source 110b so that the second wavelength light can continue to propagate upward through the dichroic mirror 130. The second wavelength light and the first wavelength light can be combined to form composite light.

[0154] It is easy to understand that, since the light emitted by the multiple light sources 110 may have overlapping spectrum bands, the wavelengths of some light emitted by different light sources 110 may overlap.

[0155] For example, light from the first light source 110 may pass through the dichroic mirror 130 and form stray light that does not propagate along the projection light path. Light from the second light source 110 may be reflected by the dichroic mirror 130 and form stray light that does not propagate along the projection light path.

[0156] In some possible implementations, the stray light absorption structure 500 can absorb light from the first light source 110 and transmitted through the dichroic mirror 130. The stray light absorption structure 500 can absorb light from the second light source 110 and reflected by the dichroic mirror 130 to reduce the interference of the stray light on the projection effect of the projection light machine.

[0157] Exemplarily, the stray light absorption structure 500 may be disposed on the second surface side of the dichroic mirror 130 , and the light incident side of the stray light absorption structure 500 may be disposed toward the second surface of the dichroic mirror 130 .

[0158] The stray light absorption structure 500 can absorb light from the first light source 110a and transmitted through the dichroic mirror 130. The stray light absorption structure 500 can absorb light from the second light source 110b and reflected by the dichroic mirror 130, thereby removing stray light generated by the light source assembly 100.

[0159] Reference Figure 5 and Figure 6In some possible implementations, the plurality of light sources 110 may include a first light source 110a, a second light source 110b, and a third light source 110c having different light emission wavelengths.

[0160] The first light source 110a may emit light of a first wavelength, the second light source 110b may emit light of a second wavelength, and the third light source 110c may emit light of a third wavelength.

[0161] The first wavelength light, the second wavelength light and the third wavelength light can be combined into composite light by the dichroic mirror 130 and propagate toward the imaging structure along the projection light path.

[0162] The first light source 110a can be set as a blue light source 110, and the first wavelength light can be set as a blue light. The second light source 110b can be set as a red light source 110, and the second wavelength light can be set as a red light. The third light source 110c can be set as a green light source 110, and the third wavelength light can be set as a green light. The blue light, the red light, and the green light can form a composite light along the projection light path.

[0163] Exemplarily, the number of dichroic mirrors 130 can be set to multiple, and the multiple dichroic mirrors 130 can include a first dichroic mirror 130a and a second dichroic mirror 130b arranged in sequence, so as to realize the light combining process of the first wavelength light, the second wavelength light and the third wavelength light through the matched first dichroic mirror 130a and the second dichroic mirror 130b.

[0164] The first dichroic mirror 130a and the second dichroic mirror 130b are arranged parallel to each other. The first surface of the first dichroic mirror 130a faces left and upward, and the second surface of the first dichroic mirror 130a faces right and downward. The first surface of the second dichroic mirror 130b faces left and upward, and the second surface of the second dichroic mirror 130b faces right and downward.

[0165] The first light source 110a is disposed on the left side of the first dichroic mirror 130a. The first light source 110a is disposed on the first surface side of the first dichroic mirror 130a. The first light source 110a emits light toward the first surface of the first dichroic mirror 130a.

[0166] The second light source 110 b is disposed at the lower side of the first dichroic mirror 130 a , and the second light source 110 b is disposed at the second surface side of the first dichroic mirror 130 a , and the second light source 110 b emits light toward the second surface of the dichroic mirror 130 a .

[0167] The light emitting direction of the first light source 110a is perpendicular to the light emitting direction of the second light source 110b. The light emitting direction of the second light source 110b is parallel to the light emitting direction of the third light source 110c.

[0168] The third light source 110 c is disposed at the lower side of the second dichroic mirror 130 b , and the third light source 110 c emits light toward the second surface of the second dichroic mirror 130 b .

[0169] For example, the first dichroic mirror 130a can transmit the light of the first wavelength and reflect the light of the second wavelength. The second dichroic mirror 130b can reflect the light of the first wavelength and the light of the second wavelength and reflect the light of the third wavelength.

[0170] Along the projection optical path, the first wavelength light from the first light source 110a can pass through the first dichroic mirror 130a and be reflected by the second dichroic mirror 130b to propagate toward the imaging structure.

[0171] Along the projection optical path, the second wavelength light from the second light source 110 b may be reflected by the first dichroic mirror 130 a and then propagate toward the imaging structure after being reflected by the second dichroic mirror 130 b .

[0172] Along the projection optical path, the third wavelength light from the third light source 110 c may pass through the second dichroic mirror 130 b and propagate toward the imaging structure.

[0173] Exemplarily, when the light source assembly 100 is in working state, the first light source 110a emits a first wavelength of light to the right toward the first dichroic mirror 130a, the first wavelength of light can pass through the first dichroic mirror 130a to propagate toward the second dichroic mirror 130b, the first wavelength of light can be reflected by the second dichroic mirror 130b and then propagate upward, so that the first wavelength of light can propagate upward after passing through the first dichroic mirror 130a and the second dichroic mirror 130b.

[0174] The second light source 110b emits a second wavelength of light upward toward the first dichroic mirror 130a. The second wavelength of light is reflected by the first dichroic mirror 130a and then propagates toward the second dichroic mirror 130b. The second wavelength of light is reflected by the second dichroic mirror 130b and then propagates upward, so that the second wavelength of light can propagate upward after passing through the first dichroic mirror 130a and the second dichroic mirror 130b.

[0175] The third light source 110c emits a third wavelength light upward toward the second dichroic mirror 130b, and the second dichroic mirror 130b transmits the third wavelength light from the third light source 110c, so that the third wavelength light can continue to propagate upward through the second dichroic mirror 130b, thereby allowing the first wavelength light, the second wavelength light and the third wavelength light to combine to form composite light.

[0176] In some possible implementations, the number of the stray light absorption structure 500 may be set to one or more. For example, the number of the stray light absorption structure 500 may be set to one, and one stray light absorption structure 500 may be used to absorb stray light generated at one or more locations.

[0177] Alternatively, the number of stray light absorption structures 500 can be set to multiple, and multiple stray light absorption structures 500 can be used to absorb stray light generated at multiple positions. Multiple stray light absorption structures 500 can be arranged in sequence along the projection light path, and multiple stray light absorption structures 500 are used to absorb stray light generated at different positions of the projection light path, so as to improve the absorption and processing effect of the stray light absorption structure 500 on stray light, and improve the projection effect of the projection light machine.

[0178] For example, the number of the stray light absorption structure 500 may be plural. The stray light absorption structure 500 may include a first light absorption structure 500a.

[0179] The first light absorption structure 500a may face the first surface of the first dichroic mirror 130a, and the first light absorption structure 500a may be located above the first dichroic mirror 130a. The first light absorption structure 500a absorbs the first wavelength light reflected by the first dichroic mirror 130a, and the first light absorption structure 500a absorbs the second wavelength light passing through the first dichroic mirror 130a.

[0180] It is easy to understand that the second light source 110b is configured as the first partial light source 110 corresponding to the first light absorption structure 500a, and the first light source 110a is configured as the second partial light source 110 corresponding to the first light absorption structure 500a.

[0181] For example, the first wavelength light from the first light source 110a may be reflected by the first dichroic mirror 130a and form stray light that does not propagate along the projection light path. The second wavelength light from the second light source 110b may pass through the first dichroic mirror 130a and form stray light that does not propagate along the projection light path.

[0182] The first light absorption structure 500a absorbs the first wavelength light reflected by the first dichroic mirror 130a, and absorbs the second wavelength light passing through the first dichroic mirror 130a, so that part of stray light from the first light source 110a and the second light source 110b can be absorbed by the first light absorption structure 500a.

[0183] Exemplarily, the number of the stray light absorption structure 500 may be set to be multiple. The stray light absorption structure 500 includes a second light absorption structure 500 b .

[0184] The second light absorption structure 500b can face the second surface of the second dichroic mirror 130b, absorb the first wavelength light and the second wavelength light passing through the second dichroic mirror 130b, and absorb the third wavelength light reflected by the second dichroic mirror 130b.

[0185] It is easy to understand that the first light source 110a and the second light source 110b are configured as the first partial light source 110 corresponding to the second light absorption structure 500b, and the third light source 110c is configured as the second partial light source 110 corresponding to the second light absorption structure 500b.

[0186] For example, the first wavelength light from the first light source 110a may be reflected by the second dichroic mirror 130b and form stray light that does not propagate along the projection light path. The second wavelength light from the second light source 110b may be reflected by the second dichroic mirror 130b and form stray light that does not propagate along the projection light path. The third wavelength light from the third light source 110c may be reflected by the second dichroic mirror 130b and form stray light that does not propagate along the projection light path.

[0187] The second light absorption structure 500b can absorb the first wavelength light and the second wavelength light passing through the second dichroic mirror 130b, and the second light absorption structure 500b absorbs the third wavelength light reflected by the second dichroic mirror 130b, so that part of the stray light from the first light source 110a, the second light source 110b and the third light source 110c can be absorbed by the second light absorption structure 500b.

[0188] By adopting the above technical solution, during the use of the projection light machine, part of the light emitted by the light source assembly 100 will deviate from the projection light path and form stray light. The stray light absorption structure 500 is used to absorb the stray light from the light source assembly 100 that does not propagate along the projection light path, thereby reducing the interference of the stray light on the projection light propagating along the projection light path and improving the imaging effect of the projection light machine.

[0189] Reference Figure 6 and Figure 7 In some possible implementations, the imaging structure may include a first imaging component 200 and a second imaging component 400 that are sequentially disposed along the projection light path.

[0190] The first imaging assembly 200 can at least be used to adjust and shape the composite light from the light source assembly 100. The second imaging assembly 400 can at least be used to deflect and adjust the composite light from the first imaging assembly 200 so that the composite light can form projection light.

[0191] For example, the first imaging assembly 200 may include a polarizer 210. The polarizer 210 may be used to receive the composite light from the light source assembly 100, and the polarizer 210 may be used to perform polarization processing on the composite light from the light source assembly 100.

[0192] The processor of the liquid crystal on silicon type projection optical engine (hereinafter referred to as LCOS chip 300) can be used to modulate the projection image and modulate the polarization state of the projection image signal to the S polarization state. Therefore, before the composite light reaches the LCOS chip 300, the composite light can be polarized by the polarizer 210 to form a P polarized light with extremely high purity, thereby improving the contrast of the projection image and the display effect of the projection image.

[0193] The collimator 120 in the light source assembly 100 collimates the light from the multiple light sources 110, so that the incident angle of the composite light is small. The value of the polarization degree of the composite light depends on the incident angle between the incident light and the polarizer. At this time, the incident angle of the composite light is small, which also makes the purity of the P polarized light after polarization processing by the polarizer 210 relatively high.

[0194] Exemplarily, the first imaging assembly 200 may include a collimation corrector 220 . Along the projection light path, the collimation corrector 220 may be disposed on a side of the polarizer 210 away from the light source assembly 100 , and the collimation corrector 220 may be used to receive the composite light from the polarizer 210 .

[0195] The curvature radius of the collimation corrector 220 may be greater than or equal to 51 mm and less than or equal to 56 mm. For example, the curvature radius of the collimation corrector 220 may be set to one of 51 mm, 52 mm, 53 mm, 54 mm, 55 mm and 56 mm.

[0196] The thickness of the collimation corrector 220 is greater than or equal to 1 mm and less than or equal to 3 mm. For example, the thickness of the collimation corrector 220 can be set to one of 1 mm, 1.5 mm, 2 mm, 2.5 mm and 3 mm.

[0197] The collimation correction element 220 can correct the composite light from the polarizer 210, thereby improving the uniformity of the composite light, making the light spot formed by the composite light to the subsequent light homogenizer 230 more uniform, and improving the display effect of the projected image of the projection light machine.

[0198] Reference Figure 7-Figure 9 , illustratively, the first imaging assembly 200 may include a light homogenizer 230. The light homogenizer 230 can improve the uniformity of the composite light and enhance the uniformity of the light spot formed by the composite light.

[0199] The light homogenizer 230 can be configured as an integrator rod or a fly-eye lens. The integrator rod homogenizes the light beam based on the principle of angular overlap, while the fly-eye lens homogenizes the light beam based on the method of spatial overlap.

[0200] For example, the light homogenizer 230 may be configured as a fly-eye lens to homogenize the composite light through the fly-eye lens, thereby reducing the volume of the light homogenizer 230 and the assembly space required for the light homogenizer 230 .

[0201] The compound eye lens may include several miniature rectangular lenses, and the compound eye lens is also called a fly-eye lens, wherein a single miniature rectangular lens may adopt a plano-convex lens structure, and the hole shape of the rectangular lens may be rectangular, and the aspect ratio of the hole of the rectangular lens may be set to 4:3 or 16:9.

[0202] Exemplarily, the entire fly-eye lens is composed of two mutually symmetrical microlens arrays, wherein the Fly-eye Lens arrays#1 where parallel light is incident is the front fly-eye lens array, and the Fly-eye Lens arrays#2 where light is emitted is the rear fly-eye lens array.

[0203] The distance between #1 and #2 is equal to the focal length f of the microlens, and the center of the microlens in #2 is located at the focus of the corresponding single microlens in #1. Since a condenser lens is added after the compound eye lens system to focus the light beam, the small light beams emitted from a single microlens overlap on the screen, and the uniformity of multiple small light beams is greater than that of the entire wide light beam.

[0204] The compound eye lens adopts a symmetrical structure, which allows small light beams with different uniformities to be superimposed and compensate each other, ultimately achieving a uniform light effect.

[0205] The fly-eye lens may include two symmetrical microlens arrays. Alternatively, the fly-eye lens may be configured as an integral fly-eye lens, which may be configured as: merging two microlens arrays into one without an air gap in between.

[0206] The integral compound eye lens can be made of polymethyl methacrylate (PMMA), which can simplify the design process of the compound eye lens, reduce the processing cost of the compound eye lens, and reduce the spatial error caused by the assembly of the double-chip microlens array.

[0207] Exemplarily, the first imaging assembly 200 may include a shaping lens 240. Along the projection optical path, the shaping lens 240 can perform beam shrinking processing on the composite light from the light homogenizer 230 so that the composite light from the light homogenizer 230 can be adapted to the size of the subsequent LCOS chip 300.

[0208] The first imaging assembly 200 may include an aperture group 250. Along the projection optical path, the aperture group 250 can be used to receive the composite light from the shaping lens 240, and can be used to adjust and improve the collimation and stray degree of the composite light so that the composite light can be suitable for the subsequent LCOS chip 300.

[0209] The aperture group 250 may include a first aperture 251 and a second aperture 252 that are sequentially spaced along the projection light path. The opening size of the first aperture 251 may be larger than the opening size of the second aperture 252, so that different light spots can be screened out by the matched first aperture 251 and second aperture 252, thereby adjusting and improving the collimation and stray degree of the composite light.

[0210] In some possible implementations, the first imaging assembly 200 may include a polarizing beam splitter 260 (PBS for short). A second surface of the polarizing beam splitter 260 faces the second imaging assembly 400 .

[0211] The polarization beam splitter 260 can be used to receive the light from the aperture group 250 , and can be used to transmit a first portion of polarized light in the light and reflect a second portion of polarized light in the light.

[0212] The polarizing beam splitter 260 may be in the shape of a sheet and may include a polarizing beam splitter film, the material of which is one of a metal wire grid, an organic material and an inorganic material, so that the structure of the polarizing beam splitter 260 is more reliable, so that the projection optical machine can meet the vehicle working conditions.

[0213] It is easy to understand that when the light from the light source assembly 100 passes through the polarizer 210, the polarizer 210 can polarize the light so that the light forms a first portion of polarized light and a second portion of polarized light.

[0214] For example, the first part of polarized light can be set to P polarized light (i.e. parallel linear polarized light, the polarization vector of the light is in the plane of the incident light and the reflected light), and the second part of polarized light can be set to S polarized light (i.e. vertical linear polarized light, the polarization vector of the light is perpendicular to the plane of the incident light and the reflected light).

[0215] Exemplarily, the polarizing beam splitter 260 is used to transmit the first portion of polarized light in the light from the light source assembly 100 and transmit the first portion of polarized light to the second imaging assembly 400. The polarizing beam splitter 260 is used to reflect the second portion of polarized light in the light from the light source assembly 100, thereby realizing the separation process of the first portion of polarized light and the second portion of polarized light in the light.

[0216] The polarizing beam splitter 260 can be tilted. Along the projection light path, the first surface of the polarizing beam splitter 260 faces right and downward, the first surface of the polarizing beam splitter 260 faces the light source assembly 100, the second surface of the polarizing beam splitter 260 faces left and upward, and the second surface of the polarizing beam splitter 260 faces the second imaging assembly 400.

[0217] It should be noted that along the projection light path, most of the propagation medium between the shaping lens 240 and the polarizing beam splitter 260 is air. When designing the first imaging component 200, it is necessary to appropriately lengthen the back focus to ensure that when the first part of the polarized light in the light reaches the surface of the LCOS chip 300, the light spot of the first part of the polarized light matches the size of the LCOS chip 300.

[0218] The second portion of polarized light reflected by the polarization beam splitter 260 is stray light. The stray light absorbing structure 500 is used to absorb the second portion of polarized light reflected by the polarization beam splitter 260 to reduce interference of the second portion of polarized light on the first portion of polarized light on the projection optical path.

[0219] For example, the stray light absorbing structure 500 is used to absorb the S polarized light reflected by the polarization beam splitter 260 , so that the first polarized light and the second polarized light in the light can be separated by the matched polarization beam splitter 260 and the stray light absorbing structure 500 .

[0220] Reference Figure 7 and Fig.10 Exemplarily, the first imaging component 200 includes a wave plate 270 , and the wave plate 270 may be a quarter wave plate 270 .

[0221] Illustratively, the first imaging assembly 200 includes a terminal polarizer 280 .

[0222] The optical axis angle between the wave plate 270 and the terminal polarizer 280 can be 0°. At this time, P-polarized light enters the polarizing beam splitter 260, is transmitted to the LCOS chip 300, is modulated by the LCOS chip 300 to be S-light incident on the polarizing beam splitter 260, and is then reflected by the polarizing beam splitter 260 to the terminal polarizer 280.

[0223] The polarized light emitted after being modulated by the LCOS chip 300 includes a large amount of S polarized light and a small amount of light in other polarization states. When passing through the wave plate 270, since the angle between the vibration direction of the S polarized light and the slow axis of the wave plate 270 is 0°, the S polarized light passes through the wave plate 270 without changing the polarization state, and the light in other polarization states is converted into elliptically polarized light after passing through the wave plate 270.

[0224] Since the polarization beam splitter 260 allows P-polarized light to pass through and reflects S-polarized light and light of other polarization states, the S-polarized light and elliptically polarized light emitted from the wave plate 270 can be reflected to the terminal polarizer 280 via the polarization beam splitter 260 .

[0225] Furthermore, since the terminal polarizer 280 allows S-polarized light to pass through and blocks P-polarized light and light of other polarization states, the S-polarized light emitted from the polarizing beam splitter 260 can pass through the terminal polarizer 280, and the elliptically polarized light will be blocked by the terminal polarizer 280, thereby not affecting the imaging quality, thereby achieving the purpose of improving the contrast of the projected image.

[0226] In some possible implementations, the second imaging assembly 400 may be configured as a projection lens, which may include a first lens group, a third aperture, and a second lens group sequentially arranged along a projection optical path.

[0227] Along the projection light path, the second imaging assembly 400 and the light source assembly 100 are located at opposite ends of the first imaging assembly 200 .

[0228] The first lens group can at least be used to refract the first image light and emit the second image light to the third aperture. The third aperture is used to transmit the second image light and make the second image light propagate along the projection light path to the second lens group. The second lens group is used to refract the second image light and emit the third image light propagating along the projection light path.

[0229] Reference Figure 4 , below, taking the light source assembly 100 including the first light source 110a, the second light source 110b, the third light source 110c, the first dichroic mirror 130a and the second dichroic mirror 130b as an example, the absorption method of the projection light path and the stray light absorption structure 500 in the projection light machine for the stray light not propagating along the projection light path is described.

[0230] Exemplarily, when the light source assembly 100 is in working state, the first light source 110a emits a first wavelength of light to the right toward the first dichroic mirror 130a, the first wavelength of light can pass through the first dichroic mirror 130a to propagate toward the second dichroic mirror 130b, the first wavelength of light can be reflected by the second dichroic mirror 130b and then propagate upward, so that the first wavelength of light can propagate upward after passing through the first dichroic mirror 130a and the second dichroic mirror 130b.

[0231] The second light source 110b emits a second wavelength of light upward toward the first dichroic mirror 130a. The second wavelength of light is reflected by the first dichroic mirror 130a and then propagates toward the second dichroic mirror 130b. The second wavelength of light is reflected by the second dichroic mirror 130b and then propagates upward, so that the second wavelength of light can propagate upward after passing through the first dichroic mirror 130a and the second dichroic mirror 130b.

[0232] The third light source 110c emits a third wavelength light upward toward the second dichroic mirror 130b, and the second dichroic mirror 130b transmits the third wavelength light from the third light source 110c, so that the third wavelength light can continue to propagate upward through the second dichroic mirror 130b, thereby allowing the first wavelength light, the second wavelength light and the third wavelength light to combine to form composite light.

[0233] The first light absorption structure 500a absorbs the first wavelength light reflected by the first dichroic mirror 130a, and absorbs the second wavelength light passing through the first dichroic mirror 130a, so that part of stray light from the first light source 110a and the second light source 110b can be absorbed by the first light absorption structure 500a.

[0234] The second light absorption structure 500b can absorb the first wavelength light and the second wavelength light passing through the second dichroic mirror 130b, and the second light absorption structure 500b absorbs the third wavelength light reflected by the second dichroic mirror 130b, so that part of the stray light from the first light source 110a, the second light source 110b and the third light source 110c can be absorbed by the second light absorption structure 500b.

[0235] The transmission axis of the polarizer 210 is the P light transmission axis. After the small-angle composite light enters the polarizer 210 and is converted into P polarized light, the incident angle of the P polarized light is adjusted by the collimation correction element 220, and the P polarized light is allowed to propagate along the projection optical path.

[0236] The light homogenizer 230 can integrate the P polarized light and superimpose the small light beams with different uniformity in the P polarized light to compensate each other. The light homogenizer 230 can adjust the beam size of the P polarized light to match the size of the LCOS chip 300.

[0237] The polarization beam splitter 260 can transmit P polarized light and reflect S polarized light. The P polarized light enters the LCOS chip 300 after passing through the wave plate 270 , and is modulated into S polarized light by the LCOS chip 300 and then reflected back to the wave plate 270 .

[0238] The fast axis of the wave plate 270 is parallel to the vibration axis of the S polarized light reflected back, so that the S polarized light can pass through without changing the polarization state, while the light of other polarization states is converted into circularly polarized light when transmitted because their vibration axis is not parallel to the fast axis of the wave plate 270.

[0239] Due to the P polarized light (i.e. Figure 4 The P light in the transmission axis is not parallel, and the S polarized light (i.e. Figure 4 The S light in the loop) and other polarization states of light cannot pass through, and are reflected to the terminal polarizer 280 with an S polarized light transmission axis, so that the S polarized light reflected by the loop can be imaged and projected in the second imaging component 400 along the projection optical path, while the light of other polarization states reflected by the loop cannot pass through the terminal polarizer 280.

[0240] In some possible implementations, the number of the stray light absorption structure 500 may be set to one or more. Fig.11 When the number of stray light absorption structures 500 is set to multiple, multiple stray light absorption structures 500 can be arranged in sequence along the projection light path to absorb and process stray light that does not propagate along the projection light path from different positions of the projection light path through the multiple stray light absorption structures 500.

[0241] For example, the number of the stray light absorption structure 500 may be set to one.

[0242] When the light source assembly 100 includes a light source 110 , the light source 110 can emit light to the first imaging assembly 200 so that the light can form a first portion of polarized light and a second portion of polarized light, and the stray light absorption structure 500 is used to absorb the second portion of polarized light after being reflected by the polarization beam splitter 260 .

[0243] For example, the number of the stray light absorption structures 500 may be plural.

[0244] When the light source assembly 100 includes a plurality of light sources 110 and a dichroic mirror 130, the plurality of stray light absorption structures 500 may include a first light absorption structure 500a, a second light absorption structure 500b and a third light absorption structure 500c. The positions of the first light absorption structure 500a and the second light absorption structure 500b are as described above, and the embodiments of the present application will not be repeated here.

[0245] The third light absorption structure 500c can be used to absorb the second portion of polarized light reflected by the polarization beam splitter 260 to reduce the interference of the second portion of polarized light on the first portion of polarized light on the projection light path.

[0246] It is easy to understand that at least two of the first light absorption structure 500a, the second light absorption structure 500b and the third light absorption structure 500c can be integrated into an integrated absorption structure, which can at least be used to absorb stray light at several positions in the projection light path to reduce the number of stray light absorption structures 500.

[0247] Exemplarily, the stray light absorption structure 500 may include a first light absorption structure 500 a , a second light absorption structure 500 b , and a third light absorption structure 500 c .

[0248] The first light absorption structure 500a and the second light absorption structure 500b can be arranged on different sides relative to the imaging structure. The first light absorption structure 500a and the third light absorption structure 500c can be arranged on different sides relative to the imaging structure. The second light absorption structure 500b and the third light absorption structure 500c can be arranged on the same side relative to the imaging structure.

[0249] When the stray light absorption structure 500 includes the first light absorption structure 500a, the first light absorption structure 500a is located at the first side of the first imaging component 200, and the first light absorption structure 500a is located at one end of the first imaging component (200) close to the light source component 100.

[0250] When the stray light absorption structure 500 includes the second light absorption structure 500b, the second light absorption structure 500b is located at the second side of the first imaging assembly 200. The second light absorption structure 500b is located at one end of the first imaging assembly 200 close to the light source assembly 100.

[0251] The third light absorption structure 500c is arranged on the side of the second light absorption structure 500b away from the light source assembly 100. Along the projection light path, stray light from the light source assembly 100 can be absorbed by the first light absorption structure 500a, the second light absorption structure 500b and the third light absorption structure 500c in sequence, thereby improving the absorption effect of the stray light absorption structure 500 on stray light.

[0252] The third light absorption structure 500 c is located at the second side of the first imaging assembly 200. The third light absorption structure 500 c is located at an end of the first imaging assembly 200 away from the light source assembly 100.

[0253] In some possible implementations, the stray light absorbing structure 500 may include a container 510 and a one-way light transmitting member 530. The container 510 may enclose a reflective cavity 511 having an opening toward the projection light path, so that stray light that does not propagate along the projection light path can enter the reflective cavity 511 through the opening.

[0254] Exemplarily, the one-way light-transmitting element 530 can be set at the opening, and the one-way light-transmitting element 530 is suitable for transmitting stray light toward the reflection cavity 511 and blocking light propagating from the reflection cavity 511 to the projection light path, so as to reduce the possibility of light in the reflection cavity 511 passing through the projection light path.

[0255] When the stray light absorbing structure 500 is used to absorb and process the stray light from the light source assembly 100 and not propagating along the projection optical path, the stray light can be emitted into the reflection cavity 511 through the one-way light-transmitting member 530, and the stray light is reflected by the cavity wall of the reflection cavity 511 in the reflection cavity 511, so that the stray light is gradually attenuated in the reflection cavity 511. The one-way light-transmitting member 530 can block the stray light propagating from the reflection cavity 511 to the projection optical path, so as to reduce the interference of the stray light on the light propagating along the composite optical path.

[0256] Reference Fig.12 For example, the one-way light-transmitting element 530 may be configured such that the transmittance of the light with a large incident angle is less than the transmittance of the light with a small incident angle. The reflective cavity 511 may at least be used to deflect stray light to increase the incident angle of the stray light in the reflective cavity 511 .

[0257] For example, the transmittance of the one-way light-transmitting element 530 to light can be as follows: Fig.12 As shown in the figure, the x-axis represents the incident angle of the light, and the y-axis represents the average transmittance of the one-way light-transmitting element 530. When the incident angle of the light is small, the transmittance of the one-way light-transmitting element 530 to the light is high, and when the incident angle of the light is large, the transmittance of the one-way light-transmitting element 530 to the light is low.

[0258] When stray light is incident into the reflection cavity 511 through the one-way light-transmitting element 530, the stray light is reflected by the cavity wall of the reflection cavity 511, so that the stray light is gradually attenuated in the reflection cavity 511, and the energy of the stray light is gradually reduced. In addition, the reflection cavity 511 can deflect the stray light, so that the stray light is reflected on the inner wall of the reflection cavity 511, so as to increase the incident angle of the stray light in the reflection cavity 511, thereby reducing the possibility of the stray light passing through the one-way light-transmitting element 530.

[0259] Exemplarily, at least a portion of the cavity wall of the reflective cavity 511 may be provided with a reflective groove 512, and the reflective groove 512 is used to increase the incident angle of stray light.

[0260] By setting a reflective groove 512 on the cavity wall of the reflective cavity 511, when stray light propagates to the reflective groove 512, the stray light will be scattered at the reflective groove 512. The reflective groove 512 can further increase the incident angle of the stray light, thereby improving the absorption and processing effect of the stray light absorption structure 500 on the stray light.

[0261] The stray light absorption structure 500 may further include a reflective sheet 520. The reflective sheet 520 may be disposed in the reflective cavity 511, and is used to deflect stray light passing through the one-way light-transmitting element 530 toward the reflective groove 512, so that the stray light can propagate toward the reflective groove 512 after being reflected by the reflective sheet 520, and then can be scattered by the reflective groove 512 to increase the incident angle of the stray light.

[0262] For example, in the first light absorption structure 500a, the opening is downward, the reflective sheet 520 can be tilted, the reflective surface of the reflective sheet 520 is facing left and downward, and the reflective groove 512 can be at least disposed on the left side of the reflective sheet 520. The reflective sheet 520 can reflect stray light from the dichroic mirror 130 that does not propagate along the projection light path, so that the stray light can propagate to the left toward the reflective groove 512, thereby causing the stray light to be scattered at the reflective groove 512.

[0263] For example, in the second light absorption structure 500b, the opening is to the left, the reflective sheet 520 can be tilted, the reflective surface of the reflective sheet 520 is to the left and upward, and the reflective groove 512 can be at least disposed above the reflective sheet 520. The reflective sheet 520 can reflect stray light from the dichroic mirror 130 that does not propagate along the projection light path, so that the stray light can propagate upward toward the reflective groove 512, thereby causing the stray light to be scattered at the reflective groove 512.

[0264] For example, in the third light absorption structure 500c, the opening is to the left, the reflective sheet 520 can be tilted, the reflective surface of the reflective sheet 520 is to the left and downward, and the reflective groove 512 can be at least disposed below the reflective sheet 520. The reflective sheet 520 can reflect stray light from the polarizing beam splitter 260 that does not propagate along the projection light path, so that the stray light can propagate downward toward the reflective groove 512, thereby causing the stray light to be scattered at the reflective groove 512.

[0265] For example, refer to Fig.11 and Fig.13 In the same stray light absorption structure 500, the number of openings can be set to multiple, and the multiple openings are directed to different positions of the projection light path.

[0266] The number of one-way light-transmitting elements 530 can be set to be multiple, and the one-way light-transmitting elements 530 are set at corresponding openings, so that stray light from different positions of the projection light path can be absorbed by a stray light absorption structure 500, thereby reducing the number of stray light absorption structures 500 and improving the absorption efficiency of the stray light absorption structures 500 for stray light.

[0267] Reference Fig.11 and Fig.13In some possible implementations, the projection optical machine may further include a housing 600. The light source assembly 100 and the imaging structure are disposed in the housing 600, and the housing 600 can support and fix the light source assembly 100 and the imaging structure to a certain extent, thereby making the installation of the light source assembly 100 and the imaging structure more stable.

[0268] Exemplarily, the light source assembly 100 and the first imaging assembly 200 in the imaging structure can be arranged on the inner side of the housing 600, and the first imaging assembly 200 can be arranged as an intracavitary imaging assembly. The second imaging assembly 400 in the imaging structure can be arranged on the outer side of the housing 600, and the second imaging assembly 400 can be arranged as an extracavitary imaging assembly.

[0269] The stray light absorption structure 500 may be disposed in the housing 600. For example, the container 510 may be disposed inside the housing 600, with the opening of the container 510 facing the projection light path. Alternatively, the container 510 may be disposed outside the housing 600, with the opening of the container 510 facing the projection light path.

[0270] The housing 600 can be reused to form at least part of the stray light absorption structure 500, so that the stray light absorption structure 500 can be integrated into the housing 600. The housing 600 can be reused to form part of the receiving member 510, so that the housing 600 can be used to enclose a partial reflective cavity 511, so that the housing 600 has more functions.

[0271] Exemplarily, the housing 600 may be provided with a first partition plate 610, which may be used to form at least a portion of the container 510. The first surface of the first partition plate 610 and the housing 600 form a reflection cavity 511. The second surface of the first partition plate 610 and the housing 600 form a mounting cavity 630, which is used to accommodate a portion of the imaging structure.

[0272] The first surface of the first partition plate 610 may be provided with a reflective groove 512, which is used to increase the incident angle of stray light. The second surface of the first partition plate 610 may be used to enclose a mounting cavity 630, which may at least be used to set a projection light path.

[0273] The first partition plate 610 can be used to form at least one of the second light absorption structure 500b and the third light absorption structure 500c, and the first surface of the first partition plate 610 can enclose at least one of the reflection cavity 511 of the second light absorption structure 500b and the reflection cavity 511 of the third light absorption structure 500c with the shell 600.

[0274] For example, the number of the stray light absorption structure 500 is set to be plural. The housing 600 may be provided with a second partition plate 620 , and the second partition plate 620 may at least be used to form the receiving member 510 .

[0275] The first surface of the second partition plate 620 and the first partial housing 600 may enclose a reflection cavity 511 ; the second surface of the second partition plate 620 and the second partial housing 600 may enclose another reflection cavity 511 .

[0276] For example, the first surface of the second partition plate 620 and the first partial shell 600 can form a reflective cavity 511 of the second light absorption structure 500b; the second surface of the second partition plate 620 and the second partial shell 600 can form a reflective cavity 511 of the third light absorption structure 500c, so that the second partition plate 620 can be reused to form the second light absorption structure 500b and the third light absorption structure 500c.

[0277] At least one of the first surface and the second surface of the second partition plate 620 may be provided with a reflective groove 512 for increasing the incident angle of stray light.

[0278] To sum up, the projection light machine includes a light source assembly 100 and an imaging assembly which are arranged in sequence along the projection light path. During the use of the projection light machine, the light source assembly 100 can emit light to the imaging structure, and at least part of the light can pass through the imaging structure along the projection light path to form projection light, thereby enabling the imaging of the projection light machine to be realized through the projection light.

[0279] During the use of the projection light machine, part of the light emitted by the light source assembly 100 will deviate from the projection light path and form stray light. The stray light absorption structure 500 of the projection light machine is used to absorb the stray light from the light source assembly 100 that does not propagate along the projection light path, thereby reducing the interference of the stray light on the projection light propagating along the projection light path and improving the imaging effect of the projection light machine.

[0280] An embodiment of the present application provides a vehicle, comprising a projection light engine according to any of the above-mentioned embodiments.

[0281] Since the vehicle includes the projection light machine of any one of the above-mentioned embodiments, the advantages of the vehicle including the projection light machine of any one of the above-mentioned embodiments can be specifically referred to the relevant description above, which will not be repeated here.

[0282] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0283] In the description of the present invention, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0284] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can make the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0285] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projection optical machine, characterized in that: It comprises a light source assembly (100) and an imaging structure which are sequentially arranged along a projection light path; The light source assembly (100) emits light to the imaging structure, and at least part of the light passes through the imaging structure along the projection light path to form projection light; The projection light engine comprises at least one stray light absorption structure (500), and the stray light absorption structure is used to absorb stray light from the light source assembly (100).

2. The projection optical machine according to claim 1, characterized in that: The light source assembly (100) comprises a light source (110), and the light emitting side of the light source (110) is arranged toward the imaging structure.

3. The projection optical machine according to claim 1, characterized in that: The light source assembly (100) comprises a plurality of light sources (110) and a dichroic mirror assembly, wherein the light source (110) emits light along the projection light path toward the dichroic mirror assembly; The dichroic mirror assembly is used for combining light from a plurality of light sources (110) to form composite light, and for causing the composite light to propagate along the projection light path toward the imaging structure.

4. The projection optical machine according to claim 3, characterized in that: The plurality of light sources include a first light source (110a) and a second light source (110b).

5. The projection optical machine according to claim 4, characterized in that: The dichroic mirror assembly includes a dichroic mirror (130).

6. The projection optical machine according to claim 5, characterized in that: The first light source (110a) is disposed on a first surface side of the dichroic mirror (130).

7. The projection optical machine according to claim 6, characterized in that: The second light source (110b) is disposed on the second surface side of the dichroic mirror (130).

8. The projection optical machine according to claim 7, characterized in that: The stray light absorption structure (500) is disposed on the second surface side of the dichroic mirror (130).

9. The projection optical machine according to claim 7, characterized in that: The light incident side of the stray light absorption structure (500) is arranged toward the second surface of the dichroic mirror (130).

10. The projection optical machine according to claim 3, characterized in that: The plurality of light sources include a first light source (110a), a second light source (110b) and a third light source (110c).

11. The projection optical machine according to claim 10, characterized in that: The dichroic mirror assembly includes a first dichroic mirror (130a).

12. The projection optical machine according to claim 11, characterized in that: The first light source (110a) is disposed on a first surface side of the first dichroic mirror (130a).

13. The projection optical machine according to claim 11, characterized in that: The second light source (110b) is disposed on the second surface side of the first dichroic mirror (130a).

14. The projection optical machine according to claim 11, characterized in that: The dichroic mirror assembly comprises a second dichroic mirror (130b), wherein a first surface of the second dichroic mirror (130b) is arranged toward the first light source (110a).

15. The projection optical machine according to claim 14, characterized in that: The second surface of the second dichroic mirror (130b) is arranged toward the third light source (110c).

16. The projection optical machine according to claim 14, characterized in that: The first dichroic mirror (130a) and the second dichroic mirror (130b) are arranged at an interval.

17. The projection optical machine according to claim 14, characterized in that: The second surface of the first dichroic mirror (130a) is arranged opposite to the first surface of the second dichroic mirror (130b).

18. The projection optical machine according to claim 16, characterized in that: The second light source (110b) and the third light source (110c) are arranged at intervals.

19. The projection optical machine according to claim 18, characterized in that: The second light source (110b) is disposed between the first dichroic mirror (130a) and the second dichroic mirror (130b).

20. The projection light machine according to claim 15, characterized in that: The light emitting direction of the first light source (110a) is perpendicular to the light emitting direction of the second light source (110b).

21. The projection optical machine according to claim 15, characterized in that: The light emitting direction of the second light source (110b) is parallel to the light emitting direction of the third light source (110c).

22. The projection optical machine according to claim 14, characterized in that: The first light source (110a), the second light source (110b) and the third light source (110c) have different light emission wavelengths; The first light source (110a) emits light of a first wavelength, the second light source (110b) emits light of a second wavelength, and the third light source (110c) emits light of a third wavelength.

23. The projection optical machine according to claim 22, characterized in that: Along the projection optical path, the light of the first wavelength passes through the first dichroic mirror (130a), is reflected by the second dichroic mirror (130b), and then propagates toward the imaging structure.

24. The projection optical machine according to claim 22, characterized in that: Along the projection optical path, the light of the second wavelength is reflected by the first dichroic mirror (130a), and is reflected by the second dichroic mirror (130b) before propagating toward the imaging structure.

25. The projection light engine according to claim 22, characterized in that: Along the projection optical path, the light of the third wavelength passes through the second dichroic mirror (130b) and then propagates toward the imaging structure.

26. The projection optical machine according to claim 22, characterized in that: The stray light absorption structure comprises a first light absorption structure (500a); The light incident side of the first light absorption structure (500a) is arranged toward the first surface of the first dichroic mirror (130a).

27. The projection optical machine according to claim 26, characterized in that: The first light absorption structure (500a) absorbs the first wavelength light reflected by the first dichroic mirror (130a).

28. The projection light machine according to claim 26, characterized in that: The first light absorption structure (500a) absorbs the second wavelength light passing through the first dichroic mirror (130a).

29. The projection light machine according to claim 26, characterized in that: The stray light absorption structure includes a second light absorption structure (500b); The light incident side of the second light absorption structure is arranged toward the second surface of the second dichroic mirror (130b).

30. The projection light machine according to claim 29, characterized in that: The second light absorption structure (500b) absorbs the first wavelength light and the second wavelength light transmitted through the second dichroic mirror (130b).

31. The projection light machine according to claim 29, characterized in that: The second light absorption structure (500b) absorbs the light of the third wavelength reflected by the second dichroic mirror (130b).

32. The projection light machine according to claim 1, characterized in that: The light source is configured as an inorganic light emitting diode.

33. The projection optical machine according to any one of claims 1 to 32, characterized in that: The imaging structure comprises a first imaging component (200) and a second imaging component (400).

34. The projection light machine according to claim 33, characterized in that: The first imaging component (200) comprises a polarizing beam splitter (260), wherein a first surface of the polarizing beam splitter (260) faces the light source component (100).

35. The projection light machine according to claim 34, characterized in that: The second surface of the polarizing beam splitter (260) faces the second imaging component (400).

36. The projection light machine according to claim 34, characterized in that: The polarizing beam splitter (260) is configured to be in a sheet shape.

37. The projection light machine according to claim 34, characterized in that: The polarizing beam splitter (260) comprises a polarizing beam splitting film, the material of which is one of a metal wire grid, an organic material and an inorganic material.

38. The projection light machine according to claim 34, characterized in that: Along the projection light path, the polarization beam splitter (260) is used to transmit a first portion of polarized light in the light from the light source assembly (100), and to allow the first portion of polarized light to propagate toward the second imaging assembly (400).

39. The projection light machine according to claim 37, characterized in that: The first imaging component (200) further comprises a wave plate (270), wherein the wave plate (270) is used to reflect light from the polarizing beam splitter (260).

40. The projection light machine according to claim 34, characterized in that: The stray light absorption structure comprises a third light absorption structure (500c), and the third light absorption structure (500c) is used to absorb the second part of polarized light reflected by the polarization beam splitter (260).

41. The projection light machine according to claim 40, characterized in that: The light incident side of the third light absorption structure (500c) faces the first surface of the polarization beam splitter (260).

42. The projection light machine according to claim 33, characterized in that: The first imaging assembly (200) includes a collimation corrector.

43. The projection light machine according to claim 42, characterized in that: The curvature radius of the collimation corrector is greater than or equal to 51 mm and less than or equal to 56 mm.

44. The projection light machine according to claim 42, characterized in that: The thickness of the collimation correction element is greater than or equal to 1 mm and less than or equal to 3 mm.

45. The projection light machine according to claim 33, characterized in that: The first imaging component (200) comprises a first aperture (251) and a second aperture (252).

46. ​​The projection light machine according to claim 45, characterized in that: The opening size of the first aperture (251) is larger than the opening size of the second aperture (252).

47. The projection light machine according to claim 40, characterized in that: The second imaging component (400) is located on a first side of the first imaging component (200).

48. The projection light machine according to claim 47, characterized in that: Along the projection light path, the second imaging component (400) and the light source component (100) are located at opposite ends of the first imaging component (200).

49. The projection light machine according to claim 48, characterized in that: When the stray light absorption structure (500) includes a first light absorption structure (500a), the first light absorption structure (500a) is located at a first side of the first imaging component (200).

50. The projection light machine according to claim 48, characterized in that: When the stray light absorption structure (500) includes a first light absorption structure (500a), the first light absorption structure (500a) is located at one end of the first imaging component (200) close to the light source component (100).

51. The projection light machine according to claim 48, characterized in that: When the stray light absorption structure (500) includes a second light absorption structure (500b), the second light absorption structure (500b) is located at the second side of the first imaging component (200).

52. The projection light machine according to claim 48, characterized in that: When the stray light absorption structure (500) includes a second light absorption structure (500b), the second light absorption structure (500b) is located at one end of the first imaging component (200) close to the light source component (100).

53. The projection light machine according to claim 48, characterized in that: The third light absorption structure (500c) is located on the second side of the first imaging component (200).

54. The projection light machine according to claim 48, characterized in that: The third light absorption structure (500c) is located at an end of the first imaging component (200) that is away from the light source component (100).

55. The projection light machine according to any one of claims 1 to 54, characterized in that: The stray light absorption structure comprises a container (510), and the container (510) encloses a reflection cavity (511).

56. The projection light machine according to claim 55, characterized in that: The reflective cavity (511) is used to deflect the stray light so as to increase the incident angle of the stray light in the reflective cavity (511).

57. The projection light machine according to claim 56, characterized in that: At least part of the cavity wall of the reflective cavity (511) is provided with a reflective groove (512), and the reflective groove (512) is used to increase the incident angle of the stray light.

58. The projection light machine according to claim 55, characterized in that: The stray light absorption structure further comprises a reflective sheet (513), and the reflective sheet (513) is arranged in the reflective cavity (511).

59. The projection light machine according to claim 56, characterized in that: The stray light absorption structure comprises a one-way light-transmitting element (530); The one-way light-transmitting element (530) is used to absorb stray light directed toward the reflection cavity (511) and to block light propagating from the reflection cavity (511) toward the projection light path.

60. The projection light machine according to claim 59, characterized in that: The one-way light-transmitting element (530) is configured such that the transmittance of light with a large incident angle is lower than the transmittance of light with a small incident angle.

61. The projection light machine according to claim 55, characterized in that: The number of the stray light absorption structures is set to be multiple, and the reflection cavities (511) of at least two of the stray light absorption structures are connected.

62. The projection light machine according to claim 57, characterized in that: The projection optical machine also includes a housing (600).

63. The projection light machine according to claim 62, characterized in that: The light source assembly (100) and the imaging structure are arranged on the housing (600).

64. The projection light machine according to claim 62, characterized in that: The housing (600) is reused to form at least a portion of the stray light absorption structure.

65. The projection light machine according to claim 64, characterized in that: The housing (600) is provided with a first partition plate (610), and the first partition plate (610) is used to form a part of the container (510).

66. The projection light machine according to claim 65, characterized in that: The first surface of the first partition plate (610) and the housing (600) form the reflection cavity (511).

67. The projection light machine according to claim 65, characterized in that: The second surface of the first partition plate (610) and the housing (600) form a mounting cavity (630), and the mounting cavity (630) is used to accommodate part of the imaging structure.

68. The projection light machine according to claim 65, characterized in that: A first surface of the first partition plate (610) is provided with a reflective groove (512), and the reflective groove (512) is used to increase the incident angle of the stray light.

69. The projection light machine according to claim 64, characterized in that: The housing (600) is provided with a second partition plate (620), and the second partition plate (620) is used to form a part of the container (510).

70. The projection light machine according to claim 69, characterized in that: The first surface of the second partition plate (620) and the first part of the shell (600) form a reflection cavity (511).

71. The projection light machine according to claim 70, characterized in that: The first surface of the second partition plate (620) is provided with a reflective groove (512).

72. The projection light machine according to claim 69, characterized in that: The second surface of the second partition plate (620) and the second part of the housing (600) form another reflection cavity (511).

73. The projection light machine according to claim 72, characterized in that: The second surface of the second partition plate (620) is provided with a reflective groove (512).

74. A vehicle, characterized in that: Comprising a projection light machine as described in any one of claims 1-73.

Images