Optical machine module

Abstract

The utility model relates to an optical machine module, which comprises a polarization light splitting assembly, an illumination assembly, a display modulation assembly and an imaging assembly, and is characterized in that the polarization light splitting assembly is provided with a light splitting surface, a display surface and an emergent surface which are oppositely arranged on two sides of the light splitting surface, and an incident surface which is positioned on one side, close to the display surface, of the light splitting surface and is inclined to the light splitting surface; the light splitting surface is used for reflecting the first linearly polarized light and transmitting the second linearly polarized light, and the polarization direction of the second linearly polarized light is perpendicular to the polarization direction of the first linearly polarized light; the lighting assembly comprises a lighting module for providing white light, a reflective mirror corresponding to the incident plane and used for reflecting the white light to the incident plane, and a first polaroid corresponding to the position between the lighting module and the incident plane and used for converting the white light into first linearly polarized light. The display modulation assembly corresponds to the display surface and is used for converting the first linearly polarized light reflected by the light splitting surface into second linearly polarized light. Therefore, the image quality contrast can be improved, and the size and volume of the optical machine module can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of near-eye display modules, and in particular to an optical machine module. Background Art

[0002] With the continuous development of new display technologies, near-eye display (NED) technologies such as augmented reality (AR) and virtual reality (VR) are becoming increasingly popular. The market for wearable display devices (such as AR glasses) is maturing. Currently, among the various NED solutions, mainstream approaches include BB, free-form prisms, arrayed waveguides, and diffraction waveguides. Waveguide-based AR display modules are widely adopted due to their compact size, light weight, and excellent user experience. Currently, mainstream waveguide-based display solutions include LCoS, LCD, and DLP. With the advancement of LED technology and microdisplay chip technology, projection displays are becoming increasingly miniaturized. At the same time, the pursuit of small size and high resolution is driving increasing demands on the industrial design (ID) appearance of glasses, which in turn places higher demands on the size of the optical engine. Therefore, it is crucial to minimize the size of the optical engine while ensuring good display quality. Utility Model Content

[0003] As the existing near-eye display modules have increasingly higher requirements for miniaturization and display effects, it is necessary to provide an optical machine module.

[0004] Optical machine module, including:

[0005] A polarization beam splitting component comprising a beam splitting surface, a display surface and an exit surface arranged oppositely to the beam splitting surface, and an incident surface located on a side of the beam splitting surface close to the display surface and inclined to the beam splitting surface, wherein the beam splitting surface is configured to reflect a first linearly polarized light and transmit a second linearly polarized light, wherein the polarization direction of the second linearly polarized light is perpendicular to the polarization direction of the first linearly polarized light;

[0006] an illumination assembly comprising an illumination module for providing white light, a reflector corresponding to the incident surface and for reflecting the white light toward the incident surface, and a first polarizer corresponding to and between the illumination module and the incident surface, the first polarizer being for converting the white light into the first linearly polarized light;

[0007] A display modulation component corresponding to the display surface and configured to convert the first linearly polarized light reflected by the beam splitting surface into the second linearly polarized light; and

[0008] An imaging component corresponds to the exit surface and is used to project the second linearly polarized light.

[0009] With this arrangement, the light path between the display surface and the lighting module is folded by a reflector, thereby preventing the optical machine module from being too long in a single direction and reducing the volume of the entire optical machine module; and the display surface and the exit surface are arranged opposite to each other and the incident surface and the exit surface are arranged adjacent to each other on the same side of the splitting surface. In this way, when the first linear polarized light entering from the display surface reaches the splitting surface, even if part of the first linear polarized light passes through the splitting surface, it will not reach the exit surface, and thus will not enter the human eye at the same time as the effective light, eliminating the influence of the angle effect at the splitting surface on the picture contrast.

[0010] In one embodiment, the optical machine module further includes a relay lens assembly disposed in the optical path between the lighting assembly and the display modulation assembly, and the relay lens assembly is used to focus light.

[0011] With this arrangement, the introduced relay lens assembly can improve the size and shape of the white light spot, thereby being able to adapt to the size of the LCoS display chip in the display modulation assembly and improving light energy utilization.

[0012] In one embodiment, the relay lens assembly includes a first relay lens located in the optical path between the lighting module and the reflector; and / or

[0013] The relay lens assembly includes a second relay lens located between the reflector and the incident surface; and / or

[0014] The relay lens assembly includes a third relay lens located between the display surface and the display modulation assembly.

[0015] With this arrangement, the combined use of multiple relay lenses can not only improve the accuracy of light spot debugging, but also adapt to the internal space layout of the optical machine module, thereby reducing the overall size of the optical machine module; in addition, the third relay lens can also share the refractive force of the imaging component on light, thereby reducing the length of the imaging component. The converging effect of the third relay lens on light can increase the amount of light entering the imaging component, and also provides a structural basis for reducing the diameter of the imaging component.

[0016] In one embodiment, the first polarizer is attached to the incident surface.

[0017] This arrangement prevents stray light from directly entering the polarization beam splitting component from the incident surface and degrading the image quality.

[0018] In one embodiment, the optical machine module further includes a turning prism located at the projection end of the imaging component, the turning prism having a reflective surface and a first transmission surface and a second transmission surface respectively inclined to the reflective surface, and the first transmission surface faces the projection end of the imaging component.

[0019] This setting enables the optical machine module to also change the direction of light projected by the imaging component, thereby adapting to the industrial design requirements of different AR glasses.

[0020] In one embodiment, the optical machine module further includes a second polarizer attached between the exit surfaces, and the second polarizer is used to absorb the first linearly polarized light and transmit the second linearly polarized light.

[0021] With this arrangement, the second polarizer selectively filters the linearly polarized light, thereby reducing the amount of reflected light entering the polarization beam splitting component, thereby improving the imaging quality of the optical machine module.

[0022] In one embodiment, the lighting module includes a light emitting element, a collimating lens located between the light emitting element and the reflector, and a color-combining and light-diffusing plate located between the collimating lens and the reflector, wherein the light emitting element is located at the focus of the collimating lens.

[0023] With this arrangement, the light beam emitted by the light emitting element is converted into parallel light by the collimating lens and then homogenized and angle-adjusted by the color-combining and light-homogenizing sheet, thereby improving the brightness consistency of different positions of the white light spot.

[0024] In one embodiment, the light-emitting element includes at least four light beads arranged in an array, and at least three of the light beads provide three primary colors of light respectively.

[0025] With this arrangement, the array arrangement enables the multiple light beads to be arranged closer to the focal point, which is beneficial to improving the uniformity of the combined color.

[0026] In one embodiment, at least one of the light beads provides white light.

[0027] With this arrangement, additional light beads that provide white light are beneficial for increasing the brightness of the white light at the center of the light spot and improving image quality.

[0028] In one embodiment, the light-emitting element includes at least three light beads arranged linearly, and the at least three light beads respectively provide three primary colors of light.

[0029] Such a setting facilitates processing and production for manufacturers, and can also be adapted to existing molds, reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the optical-mechanical module in the first embodiment provided in this application;

[0031] Figure 2 A schematic structural diagram of the optical-mechanical module in the second embodiment provided in this application;

[0032] Figure 3This is a schematic structural diagram of the optical-mechanical module in the third embodiment provided in this application;

[0033] Figure 4 A schematic structural diagram of the optical-mechanical module in the fourth embodiment provided in this application;

[0034] Figure 5 A schematic structural diagram of the optical-mechanical module in the fifth embodiment provided in this application;

[0035] Figure 6 A schematic structural diagram of a light-emitting element in an embodiment provided in this application;

[0036] Figure 7 A schematic structural diagram of a light-emitting element in another embodiment provided in this application;

[0037] Figure 8 This is a schematic structural diagram of a light-emitting component in another embodiment provided in this application.

[0038] Reference numerals:

[0039] 10. Polarization splitter assembly; 101. Splitting surface; 102. Display surface; 103. Exit surface; 104. Incident surface; 20. Illumination assembly; 21. Illumination module; 211. Light-emitting element; 2111. Light bead; 212. Collimating lens; 213. Color-combining and light-distributing plate; 22. Reflector; 23. First polarizer; 30. Display modulation assembly; 40. Imaging assembly; 401. Projection end; 50. Relay lens group; 51. First relay lens; 52. Second relay lens; 53. Third relay lens; 60. Turning prism; 601. First transmission surface; 602. Second transmission surface; 70. Second polarizer. DETAILED DESCRIPTION

[0040] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] 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", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and the like are merely used for the purpose of illustration and do not indicate an absolute orientation.

[0046] With the continuous development of new display technology, the near-eye display (NED) technology such as augmented reality (AR) and virtual reality (VR) is increasingly popular. The market of wearable display devices such as AR glasses is maturing. At present, among various schemes in the field of near-eye display, mainstream schemes include BB, free-form surface prism, array waveguide, and diffractive waveguide, etc. Among them, the AR display module based on waveguide scheme is widely used due to its small size, light weight, and good experience. At present, the mainstream display schemes based on waveguide include LCoS, LCD, DLP, etc. With the development of LED technology and micro display chip technology, projection display is becoming smaller and smaller. At the same time, people are pursuing small size and high resolution, and the requirements for the appearance of glasses ID are also increasing, which puts higher requirements on the size of the optical machine. Therefore, it is very important to minimize the size of the optical machine while ensuring the display effect and maintaining good display effect.

[0047] In order to reduce the size of the optical machine, the existing optical machine scheme usually needs to introduce a PBS light splitting prism. The gluing surface of the PBS light splitting prism usually uses a coating process to realize its light splitting function. However, the traditional coating process has an "angle effect" when splitting light, which is specifically manifested in that the S light that should be reflected by the light splitting surface will pass through the light splitting surface and enter the eye together with the P light, resulting in a decrease in picture contrast. In order to improve the picture contrast, the person skilled in the art further upgrades the traditional coating process to a PBS film on the gluing surface of the PBS light splitting prism. The PBS film can greatly improve the angle effect and improve the picture contrast. However, it cannot solve the problem that the S light passing through the light splitting surface will reach the eye.

[0048] Therefore, it is necessary to provide an optical machine module that can eliminate the influence of the angle effect on the picture contrast and has a small size.

[0049] Please refer to Figure 1 , Figure 1This is a structural diagram of the optical machine module in the first embodiment provided by the present application. The optical machine module provided by the present application includes a polarization splitting component 10, an illumination component 20, a display modulation component 30 and an imaging component 40. The polarization splitting component 10 has a splitting surface 101, a display surface 102, an incident surface 104 and an exit surface 103. The display surface 102 and the exit surface 103 are respectively located on both sides of the splitting surface 101 and are arranged opposite to each other. The incident surface 104 is arranged on the same side as the exit surface 103 and is inclined to the splitting surface 101. The splitting surface 101 is used to reflect the first linear polarized light and transmit the second linear polarized light. The second linear polarized light The polarization direction of the polarized light is perpendicular to the polarization direction of the first linear polarized light; the lighting assembly 20 includes a lighting module 21 that provides white light, a reflector 22 corresponding to the incident surface 104 and used to reflect the white light to the incident surface 104, and a first polarizer 23 corresponding to the lighting module 21 and the incident surface 104. The first polarizer 23 is used to convert the white light into the first linear polarized light. The display modulation assembly 30 corresponds to the display surface 102 and is used to convert the first linear polarized light reflected by the splitting surface 101 into the second linear polarized light. The specific optical path is as follows: the white light emitted by the lighting component 20 is reflected by the reflector 22 to the incident surface 104. During this process, the white light is converted into a first linearly polarized light (S state) through the first polarizer 23. The first linearly polarized light passes through the incident surface 104 and is reflected to the display surface 102 after reaching the splitting surface 101. The first linearly polarized light emitted from the display surface 102 reaches the display modulation component 30 and is converted into a second linearly polarized light. The second linearly polarized light passes through the display surface 102 and the exit surface 103 in sequence and is projected onto the waveguide of the AR glasses via the imaging component 40. The light path between the display surface 102 and the lighting module 21 is folded by the reflector 22 to avoid the optical machine module from being too long in a single direction, thereby reducing the volume of the entire optical machine module; and the display surface 102 and the exit surface 103 are arranged opposite to each other, and the incident surface 104 and the exit surface 103 are arranged adjacent to each other on the same side of the splitting surface 101. In this way, when the first linear polarized light entering from the display surface 102 reaches the splitting surface 101, even if part of the first linear polarized light passes through the splitting surface 101, it will not reach the exit surface 103, and will not enter the human eye at the same time as the effective light, thereby eliminating the influence of the angle effect at the splitting surface 101 on the contrast of the picture. Since the present application structurally avoids the possibility of the first linear polarized light reaching the human eye, the two splitting surfaces 101 of the PBS prism in the polarization splitting component 10 can use traditional coating technology (i.e., coating with PBS dielectric splitting film) or the assembly method of attaching polarization splitting mold (3M) to achieve splitting. In other words, this can also remove the limitations of the manufacturing process, which is conducive to reducing the manufacturing cost of the optical machine module.

[0050] Furthermore, since the area of ​​the LCoS display chip in the display modulation component 30 that receives light is limited, in order to improve the utilization rate of white light and achieve energy conservation, in one embodiment provided in the present application, the optical machine module also includes a relay lens group 50 arranged in the light path between the lighting component 20 and the display modulation component 30. The relay lens group 50 is used to focus the light, thereby improving the size and shape of the white light spot, better adapting to the size of the LCoS display chip in the display modulation component 30, and improving the utilization rate of light energy. For the convenience of describing the optical machine module provided in the present application, the optical machine module is divided into a front end and a rear end. The front end includes a polarization beam splitting component 10, an imaging component 40, and a display modulation component 30, and the rear end includes an illumination component 20. In this embodiment, due to the introduction of the reflector 22, the length of the rear end is not limited by the overall size of the optical machine module, so that installation space and debugging space can be reserved for the introduction of the relay lens group 50.

[0051] See also Figure 1 and Figure 2 , Figure 1 and Figure 2 The schematic diagrams of the structures of the optical machine modules in the three embodiments provided in this application are respectively. Optionally, the relay lens group 50 includes a first relay lens 51, a second relay lens 52 and a third relay lens 53 that can be combined. Figure 1 As shown, the first relay lens 51 is located between the lighting module 21 and the reflector 22, and the second relay lens 52 is located between the reflector 22 and the incident surface 104. Figure 2 As shown, the third lens is located between the display surface 102 and the display modulation assembly 30. The first relay lens 51 is used to converge the white light before reflection, reducing the divergence of the white light. The second relay lens 52 is used to further converge the white light after reflection. The third relay lens 53, located at the front end, not only converges the light and further adjusts the shape and size of the white light spot, but also shares the refractive power of the imaging assembly 40 on the light, thereby reducing the length of the imaging assembly 40. The convergence of the light by the third relay lens 53 can increase the amount of light entering the imaging assembly 40 and also provide a structural basis for reducing the diameter of the imaging assembly 40. The three relay lenses provided in this embodiment are single-piece aspheric lenses. It is understood that in order to minimize the volume of the optical machine module, binary optical devices such as Fresnel lenses can be used.

[0052] Please continue reading Figure 1 Optionally, in the embodiment provided herein, the first polarizer 23 is attached to the incident surface 104. This prevents stray light from directly entering the polarization beam splitter 10 from the incident surface 104 and degrading image quality. It is understood that when the optical engine module has a better stray light processing effect, the first polarizer 23 can also be placed on the light incident side of the reflector 22.

[0053] Please continue reading Figure 1 Due to the complexity of the imaging assembly 40's multi-lens arrangement, lens surface shape, and coating, light propagates through the imaging assembly 40, generating reflected light. Optionally, to reduce the impact of the reflected light from the imaging assembly 40 on the imaging of the entire optical engine module at the exit surface 103, in one embodiment provided herein, the optical engine module further includes a second polarizer 70 attached to the exit surface 103. The second polarizer 70 is configured to absorb the first linearly polarized light and transmit the second linearly polarized light. The selective filtering of the linearly polarized light by the second polarizer 70 reduces the amount of reflected light entering the polarization beam splitter 10, thereby improving the imaging quality of the optical engine module.

[0054] See also Figure 3 and Figure 4 , Figure 3 and Figure 4 The schematic diagrams of the structures of the optical-mechanical modules in the third and fourth embodiments provided in this application are respectively. Optionally, in one embodiment provided in this application, the optical-mechanical module further includes a turning prism 60 located at the projection end 401 of the imaging component 40. The turning prism 60 has a reflective surface and a first transmission surface 601 and a second transmission surface 602, respectively inclined to the reflective surface. The first transmission surface 601 faces the projection end 401 of the imaging component 40, and the second transmission surface 602 faces the image receiving surface of the waveguide. This can also change the direction of the light projected by the imaging component 40, thereby adapting to the ID requirements of different AR glasses.

[0055] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of the optical module in the fifth embodiment provided by the present application. Optionally, in order to adapt to different industrial designs (IDs) of AR glasses, in one embodiment provided by the present application, the lighting module 21 of the optical module is located on the side of the polarization beam splitting component 10 close to the display surface 102, and the orientation of the reflector 22 is arranged corresponding to the lighting module 21, that is, gradually away from the incident surface 104 from the exit surface 103 to the display surface 102. This arrangement reserves space for the side of the polarization beam splitting component 10 close to the imaging component 40, which is convenient for arranging other components of the AR glasses.

[0056] Please refer again Figure 1In order to improve the uniformity of white light, in one embodiment provided in the present application, the lighting module 21 includes a light-emitting element 211, a collimating lens 212 located between the light-emitting element 211 and the reflector 22, and a color-combining and light-dispersing plate 213 located between the collimating lens 212 and the reflector 22. The light-emitting element 211 is located at the focal point of the collimating lens 212. In this way, the light beam emitted by the light-emitting element 211 is converted into parallel light by the collimating lens 212 and then homogenized and angle-adjusted by the color-combining and light-dispersing plate 213, thereby improving the brightness consistency of different positions of the white light spot. Compared with conventional color-combining devices such as traditional dichroic mirrors, the color-combining and light-dispersing plate 213 has a smaller thickness, and thus can further compress the space required for the light path of the color-combining and light-dispersing device, which is beneficial to improving the size and volume of the optical module. Optionally, the collimating lens 212 can be a single-piece aspheric lens or a TIR collimating lens, and can be made of a UV-resistant material. This helps to improve the compactness of the structure and reduce production costs. Optionally, the color-combining and light-homogenizing plate 213 may adopt, but is not limited to, a compound eye element, a single-row or multi-row MLA array color-combining and light-homogenizing element, and other types of binary micro-optical devices that can modulate, shape, and homogenize the angle distribution of light. The processing technology may adopt, but is not limited to, wafer-level glass (WLG), wafer-level optical elements (WLO), or nanoimprint lithography (NIL).

[0057] See also Figures 6 to 8 , Figure 6 This is a schematic structural diagram of the light-emitting element 211 in an embodiment provided in this application. Figure 7 This is a structural diagram of the light-emitting element 211 in another embodiment provided by this application. Figure 8 This is a schematic structural diagram of the light emitting element 211 in another embodiment provided by this application. Figure 6 and Figure 7 As shown, optionally, in the embodiment provided in the present application, the light emitting element 211 includes at least four light beads 2111 arranged in an array, at least three light beads 2111 respectively provide three primary colors of light, and optionally, the light beads 2111 use LED light sources, which facilitates the combination, for example Figure 6 The light emitting element 211 includes four light beads 2111, of which two green light beads 2111 are arranged diagonally. Since the energy efficiency of existing green light LEDs is lower than that of equivalent red and blue LEDs, the present application facilitates the addition of a green light bead 2111 through an array combination, thereby compensating for the insufficient energy efficiency of the green light LED in the light emitting element 211. Preferably, the geometric center of the arrangement of the four light beads 2111 is aligned with the optical axis of the collimating lens 212. In this way, the four light beads 2111 can be closer to the focus of the collimating lens 212, minimizing the influence of the position of the light beads 2111 on the uniformity of the combined color. In other combinations, such as Figure 7 As shown, an array of four red, green, blue and white light beads 2111 can also be used to increase the brightness of the white light in the center of the light spot. Figure 8 As shown, in other embodiments, the number of light beads 2111 in the light-emitting element 211 can also be three and arranged linearly, which is convenient for manufacturers to process and produce, and can also be adapted to existing molds to reduce manufacturing costs.

[0058] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. Optical machine module, characterized in that: include: A polarization beam splitting component comprising a beam splitting surface, a display surface and an exit surface arranged oppositely to the beam splitting surface, and an incident surface located on a side of the beam splitting surface close to the display surface and inclined to the beam splitting surface, wherein the beam splitting surface is configured to reflect a first linearly polarized light and transmit a second linearly polarized light, wherein the polarization direction of the second linearly polarized light is perpendicular to the polarization direction of the first linearly polarized light; an illumination assembly comprising an illumination module for providing white light, a reflector corresponding to the incident surface and for reflecting the white light toward the incident surface, and a first polarizer corresponding to and between the illumination module and the incident surface, the first polarizer being for converting the white light into the first linearly polarized light; A display modulation component corresponding to the display surface and configured to convert the first linearly polarized light reflected by the beam splitting surface into the second linearly polarized light; as well as An imaging component corresponds to the exit surface and is used to project the second linearly polarized light.

2. The optical machine module according to claim 1, wherein: The optical machine module further includes a relay lens assembly disposed in the optical path between the lighting assembly and the display modulation assembly, and the relay lens assembly is used to gather light.

3. The optical machine module according to claim 2, wherein: The relay lens assembly includes a first relay lens located in the optical path between the lighting module and the reflector; and / or The relay lens assembly includes a second relay lens located between the reflector and the incident surface; and / or The relay lens assembly includes a third relay lens located between the display surface and the display modulation assembly.

4. The optical machine module according to claim 1, wherein: The first polarizer is attached to the incident surface.

5. The optical machine module according to claim 1, wherein: The optical machine module further includes a turning prism located at the projection end of the imaging component, the turning prism having a reflective surface and a first transmission surface and a second transmission surface respectively inclined to the reflective surface, and the first transmission surface faces the projection end of the imaging component.

6. The optical machine module according to claim 1, wherein: The optical machine module further includes a second polarizer attached between the exit surfaces, and the second polarizer is used for absorbing the first linear polarized light and transmitting the second linear polarized light.

7. The optical machine module according to any one of claims 1 to 6, characterized in that: The lighting module includes a light emitting element, a collimating lens located between the light emitting element and the reflector, and a color combining and light homogenizing sheet located between the collimating lens and the reflector. The light emitting element is located at the focus of the collimating lens.

8. The optical machine module according to claim 7, wherein: The light-emitting element includes at least four light beads arranged in an array, and at least three of the light beads respectively provide three primary colors of light.

9. The optical machine module according to claim 8, wherein: At least one of the light beads provides white light.

10. The optical machine module according to claim 7, wherein: The light-emitting element includes at least three linearly arranged light beads, and the at least three light beads respectively provide three primary color lights.

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