Projection module, projection system and vehicle

Abstract

The application discloses a projection module, a projection system and a vehicle. The projection module comprises a first optical device and a second optical device. The first optical device is in a first light transmission state, and the outgoing light is in a first vibration direction. The first optical device is in a second light transmission state, and the outgoing light is in a second vibration direction. The second optical device is used for making the outgoing light in the first vibration direction propagate along a first direction to form a first projection image, and is used for making the outgoing light in the second vibration direction propagate along a second direction to form a second projection image. According to the projection module, the first light transmission state and the second light transmission state of the first optical device are switched, so that the outgoing light is in different vibration directions. The outgoing light forms the first projection image and the second projection image with different projection positions through the second optical device. The horizontal projection and the near-field projection welcome and interaction functions are realized. The projection module occupies a smaller area and has a higher space utilization, so that the adaptation capability of the projection module on different vehicle models is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a projection module, projection system, and vehicle. Background Technology

[0002] With the rapid development of automotive intelligence, connectivity, and personalization, vehicle lighting has gradually expanded from its traditional function of illumination to become an important carrier of decoration, interaction, and emotional expression. Personalized lighting solutions such as welcome light carpets, dynamic ambient lighting, and exterior projection lights have gained widespread market favor, becoming key configurations for enhancing vehicle prestige and user experience. However, in related technologies, projection modules have limitations in projection distance and their large size occupies excessive vehicle space. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first objective of the present invention is to provide a projection module that reduces the occupied area, improves space utilization, and enhances the adaptability of the projection module to different vehicle models.

[0004] Another object of the present invention is to provide a projection system.

[0005] Another object of the present invention is to provide a vehicle.

[0006] According to a first aspect of the present invention, a projection module includes: a first optical device adapted to convert a light source into emitted light, the first optical device being switchable between a first light-transmitting state and a second light-transmitting state, wherein in the first light-transmitting state the emitted light has a first vibration direction and in the second light-transmitting state the emitted light has a second vibration direction; a second optical device disposed at a distance from the first optical device, the second optical device being configured to propagate the emitted light in the first vibration direction along a first direction to form a first projected image and to propagate the emitted light in the second vibration direction along a second direction to form a second projected image; the second projected image being closer to the first optical device than the first projected image.

[0007] According to an embodiment of the present invention, the projection module switches between a first light-transmitting state and a second light-transmitting state of the first optical device, causing the emitted light to vibrate in different directions. The emitted light then passes through the second optical device to form a first projection image and a second projection image with different projection positions. This achieves in-vehicle horizontal projection and in-vehicle near-field projection for welcoming and interactive functions. Compared to existing technologies, the projection module occupies a smaller area and has a higher space utilization rate, thereby improving its adaptability to different vehicle models.

[0008] According to some embodiments of the present invention, the projection module further includes a power component connected to the first optical device for driving the first optical device to switch between the first light-transmitting state and the second light-transmitting state.

[0009] According to some embodiments of the present invention, the power assembly includes: a drive member; and a transmission assembly, wherein the drive member is driveably connected to the first optical device via the transmission assembly.

[0010] According to some embodiments of the present invention, the transmission assembly includes a first transmission gear and a second transmission gear, the first optical device is disposed on the first transmission gear, the second transmission gear is connected to the output shaft of the drive member, and the first transmission gear and the second transmission gear mesh.

[0011] According to some embodiments of the present invention, the first optical device includes a polarization converter that can selectively convert the light source into outgoing light projected along the first vibration direction or outgoing light projected along the second vibration direction.

[0012] According to some embodiments of the present invention, in the first light-transmitting state, the first direction is the same as the projection direction of the emitted light; and / or, in the second light-transmitting state, the second direction intersects with the projection direction of the emitted light.

[0013] According to some embodiments of the present invention, the second optical device includes a polarization beam splitter for transmitting outgoing light along the first vibration direction and reflecting outgoing light along the second vibration direction.

[0014] According to some embodiments of the present invention, the projection module further includes: a reflector, the reflector being spaced apart from the polarization beam splitter and positioned downstream of the polarization beam splitter along the light transmission direction, wherein the emitted light in the second vibration direction is reflected by the polarization beam splitter and projected onto the reflector, and then reflected again by the reflector to form the second projected image.

[0015] According to some embodiments of the present invention, the plane containing the first end face of the polarizing beam splitter and the plane containing the second end face of the polarizing converter have a first preset angle, the first end face being the light-receiving surface of the polarizing beam splitter and the second end face being the light-emitting surface of the polarizing converter; and / or, the plane containing the third end face of the reflector is parallel to the first end face of the polarizing beam splitter, the third end face being the light-receiving surface of the reflector and the first end face being the light-receiving surface of the polarizing beam splitter; and / or, the plane containing the first end face of the polarizing beam splitter and the plane containing the second end face of the polarizing converter have a first preset angle, and the plane containing the third end face of the reflector and the plane containing the second end face of the polarizing converter have a second preset angle, the second preset angle being greater than the first preset angle, the first end face being the light-receiving surface of the polarizing beam splitter, the second end face being the light-emitting surface of the polarizing converter, and the third end face being the light-receiving surface of the reflector.

[0016] A projection system according to a second aspect of the present invention includes: a projection module according to the first aspect of the present invention described above; and a controller connected to the projection module for controlling the light transmission state of a first optical device according to a user instruction.

[0017] According to some embodiments of the present invention, the controller is configured to: control the first optical device to a first light-transmitting state when the user instruction is of a first type; and / or, control the first optical device to a second light-transmitting state when the user instruction is of a second type.

[0018] According to some embodiments of the present invention, the projection module further includes a power component for driving the first optical device to switch between a first light-transmitting state and a second light-transmitting state. The controller is configured to: when the user instruction is of a first type, control the power component to output a first initial angle to drive the first optical device to rotate to the first light-transmitting state; and / or, when the user instruction is of a second type, control the power component to output a second initial angle to control the first optical device to rotate to the second light-transmitting state.

[0019] According to some embodiments of the present invention, the projection module further includes a position sensor for acquiring angle information of the power component, and the controller is configured to control the power component to operate according to the angle information acquired by the position sensor, so as to output a corresponding initial angle.

[0020] According to some embodiments of the present invention, the projection system further includes a light source component connected to a controller and configured to configure the light source, the controller being configured to: control the light source component to configure a first type of light source when the user instruction is of a first type; and / or control the light source component to configure a second type of light source when the user instruction is of a second type.

[0021] A vehicle according to a third aspect of the present invention includes: a projection module according to the first aspect of the present invention; or a projection system according to the second aspect of the present invention.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the first optical device of the projection module in a first light-transmitting state according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the first optical device of the projection module according to an embodiment of the present invention being in a second light-transmitting state; Figure 3 This is a schematic diagram illustrating the cooperation between the first optical device and the power component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the polarization conversion element switching the light transmission state when the light source element is an LED light source element according to an embodiment of the present invention. In the diagram, the polarization conversion element is in the first light transmission state in diagram a, and the polarization conversion element is in the second light transmission state in diagram b. Figure 5 This is a schematic diagram of the polarization conversion element switching the light transmission state when the light source element is a laser light source element according to an embodiment of the present invention. In the diagram c, the polarization conversion element is in the first light transmission state, and in the diagram d, the polarization conversion element is in the second light transmission state. Figure 6 This is a schematic diagram of a projection system according to an embodiment of the present invention; Figure 7 This is a schematic diagram of a control method for a projection system according to an embodiment of the present invention.

[0024] Figure label: 100. Projection module; 1. First optical device; 11. Polarization conversion element; 12. Second end face; 2. Second optical device; 21. Polarization beam splitter; 22. First end face; 3. Power assembly; 31. Drive element; 32. Transmission assembly; 321. First transmission gear; 322. Second transmission gear; 4. Reflector; 41. Third end face; 5. Light source element; 6. First projected image; 7. Second projected image; 8. Image output projection device. Detailed Implementation

[0025] The following is for reference. Figures 1-7 A projection module 100 according to an embodiment of the first aspect of the present invention is described.

[0026] like Figures 1-7 As shown, the projection module 100 according to an embodiment of the present invention includes a first optical device 1 and a second optical device 2.

[0027] Specifically, the first optical device 1 is adapted to convert the light source into emitted light. The first optical device 1 can switch between a first light-transmitting state and a second light-transmitting state. In the first light-transmitting state, the emitted light has a first vibration direction; in the second light-transmitting state, the emitted light has a second vibration direction. The second optical device 2 is disposed at a distance from the first optical device 1. The second optical device 2 is used to direct the emitted light from the first vibration direction along the first direction (e.g., ...). Figure 2 (as shown) propagates to form a first projected image 6, and is used to cause the emitted light in the second vibration direction to propagate along the second direction (as shown). Figure 2 (As shown) propagation to form a second projected image 7. The second projected image 7 is closer to the first optical device 1 than the first projected image 6.

[0028] For example, in Figures 1-2In the example, the light source can be either polarized or unpolarized light. The first optical device 1 can efficiently convert unpolarized light into linearly polarized light in a single direction, and can also achieve mutual conversion between light of different polarization states, that is, convert the light source into emitted light in a first vibration direction or emitted light in a second vibration direction. The second optical device 2 is arranged at an interval from the first optical device 1, so as to process the emitted light processed by the first optical device 1. When the emitted light of the first optical device 1 is in the first vibration direction, it can be processed by the second optical device 2 and propagated along the first direction to form a first projected image 6; when the emitted light of the first optical device 1 is in the second vibration direction, it can be processed by the second optical device 2 and propagated along the second direction to form a second projected image 7. Thus, emitted light with different vibration directions forms projected images in different areas after being processed by the second optical device 2. Among them, the first projected image 6 can be directly projected horizontally onto a distant wall, which corresponds to the vehicle-mounted horizontal projection mode. The second projected image 7 can be formed in a certain area near the vehicle (e.g., within 1 to 6 meters of the near-field ground), which is relatively close to the first optical device 1. This state is the near-field projection mode, corresponding to the vehicle-mounted near-field projection welcome and interactive functions.

[0029] The first optical device 1 can be a polarizer or a half-wave plate. No specific limitation is made here.

[0030] The following description uses P-polarized light as the first vibration direction (for horizontal projection mode) and S-polarized light as the second vibration direction (for near-field projection mode) as examples. When the light source is unpolarized Lambertian light, the corresponding first optical device 1 can be a polarizer. When the first optical device 1 is in the first transparent state, the unpolarized Lambertian light is converted into P-polarized light after passing through the first optical device 1. The P-polarized light then propagates along the first direction after passing through the second optical device 2, projecting into the first projected image 6 in the horizontal direction, thus realizing the horizontal projection mode. When the first optical device 1 is in the second transparent state, the unpolarized Lambertian light is converted into S-polarized light after passing through the first optical device 1. The S-polarized light then propagates along the second direction after passing through the second optical device 2, finally forming the second projected image 7 in a certain area of ​​the near field, thus realizing functions such as near-field projection for welcoming guests.

[0031] According to an embodiment of the present invention, the projection module 100 switches between a first light-transmitting state and a second light-transmitting state of the first optical device 1, causing the emitted light to vibrate in different directions. The emitted light then passes through the second optical device 2 to form a first projected image 6 and a second projected image 7 with different projection positions. This achieves vehicle-mounted horizontal projection and vehicle-mounted near-field projection for welcoming and interactive functions. Compared to existing technologies, the projection module 100 occupies a smaller area and has a higher space utilization rate, thereby improving its adaptability to different vehicle models.

[0032] Furthermore, referring to Figure 3 The projection module 100 also includes a power component 3. The power component 3 is connected to the first optical device 1 and is used to drive the first optical device 1 to switch between a first light-transmitting state and a second light-transmitting state. The power component 3 provides a stable driving force to the first optical device 1, causing the first optical device 1 to change its posture and complete the switch between the first light-transmitting state and the second light-transmitting state. During the action of the power component 3 driving the first optical device 1 to change its posture, the action is continuous and smooth, ensuring timely switching response, thereby achieving stable conversion between the two light-transmitting states and meeting the operational requirements of the projection module 100 in different working modes.

[0033] Specifically, refer to Figure 3 The power assembly 3 includes a drive component 31 and a transmission component 32. The drive component 31 is connected to the first optical device 1 via the transmission component 32. In actual operation, the drive component 31 drives the transmission component 32, thereby causing the first optical device 1 to move (e.g., rotate), which in turn causes the first optical device 1 to switch between a first light-transmitting state and a second light-transmitting state, changing the vibration direction of the emitted light. After cooperating with the second optical device 2, it realizes the switching of the projection mode of the projection module 100.

[0034] According to some specific embodiments of the present invention, refer to Figure 3 The transmission assembly 32 includes a first transmission gear 321 and a second transmission gear 322. The first optical device 1 is mounted on the first transmission gear 321, and the second transmission gear 322 is connected to the output shaft of the drive unit 31. The first transmission gear 321 and the second transmission gear 322 mesh. In actual operation, the drive unit 31 outputs power to drive the second transmission gear 322 to rotate, which in turn drives the first transmission gear 321 meshing with the second transmission gear 322 to rotate. This causes the optical axis of the first optical device 1 to rotate, thereby changing the light transmission state of the first optical device 1, switching the vibration direction of the emitted light, adjusting the propagation direction of the emitted light, and realizing the switching of the projection mode of the projection module 100.

[0035] The projection mode switching process of projection module 100 is illustrated by an example of output light with P-polarized light as the first vibration direction (achieving horizontal projection mode) and output light with S-polarized light as the second vibration direction (achieving near-field projection mode): The light source consists of polarized and unpolarized light. The transmission state of the first optical device 1 is altered by the driving component 31 and the transmission assembly 32. Specifically, the driving component 31 drives the second transmission gear 322, which in turn rotates the first transmission gear 321 of the first optical device 1. This causes the first optical device 1 to rotate clockwise or counterclockwise around its center, thereby changing the polarization state of the light transmitted through it (i.e., switching between P-polarized and S-polarized light). The second optical device 2 separates the polarization of the light: one type of light, emitted in the first vibration direction, propagates along the first direction (P-polarized light), while the other type, emitted in the second vibration direction, propagates along the second direction (S-polarized light). When the light source passes through the first optical device 1 and is converted to P-polarized light, the P-polarized light then propagates along the first direction after passing through the second optical device 2. The first projected image 6 is then horizontally projected onto a distant wall, representing a vehicle-mounted horizontal projection mode. When the light passes through the first optical device 1, it is converted into S-polarized light. Then, the S-polarized light passes through the second optical device 2 and propagates along the second direction. The second projected image 7 is projected onto the near-field ground, which is the near-field projection mode.

[0036] For example, in Figure 1 , Figure 2 and Figure 4 In the example, when the light source is an LED light source, the first optical device 1 can be a polarizer. The driving unit 31 outputs power to drive the second transmission gear 322, which meshes with the first transmission gear 321. The first transmission gear 321 rotates, thereby causing the first optical device 1 to switch to a first transparent state. Unpolarized Lambertian light, after passing through the first optical device 1, is converted into P-polarized light. The P-polarized light then passes through the second optical device 2 and propagates along a first direction, projecting onto the horizontal to form a first projected image 6, thus achieving a horizontal projection mode. The driving unit 31 outputs power to rotate the first transmission gear 321 90° clockwise around its center, thereby causing the first optical device 1 to switch to a second transparent state. Unpolarized Lambertian light, after passing through the first optical device 1, is converted into S-polarized light. The S-polarized light then passes through the second optical device 2 and propagates along a second direction, finally forming a second projected image 7 in a certain near-field area, thus achieving near-field projection for welcoming and interactive functions.

[0037] For example, in Figure 1 , Figure 2 and Figure 5In the example, when the light source is a laser (assuming the initial polarization state of the laser is P-polarized light), the first optical device 1 is a half-wave plate. The driving component 31 outputs power to drive the second transmission gear 322. The second transmission gear 322 meshes with the first transmission gear 321, causing the first transmission gear 321 to rotate. This, in turn, causes the first optical device 1 to switch to a first transparent state. After passing through the first optical device 1, the laser remains P-polarized light. After passing through the second optical device 2, the P-polarized light propagates along the first direction and is projected in the horizontal direction to form a first projected image 6, thus realizing a horizontal projection mode. The driving component 31 outputs power to cause the first transmission gear 321 to rotate 45° clockwise around its center, thus causing the first optical device 1 to switch to a second transparent state. After passing through the first optical device 1, the laser is converted into S-polarized light. The S-polarized light propagates along the second direction through the second optical device 2, finally forming a second projected image 7 in a certain area of ​​the near field, thus realizing the near-field projection welcoming and interactive functions.

[0038] According to some embodiments of the present invention, with reference to Figure 1 and Figure 2 The first optical device 1 includes a polarization converter 11. The polarization converter 11 can selectively convert the light source into emitted light projected along a first vibration direction or emitted light projected along a second vibration direction. When the first optical device 1 is in a first light-transmitting state, the polarization converter 11 converts the light source into emitted light in the first vibration direction. This emitted light, after passing through the second optical device 2, propagates along the first direction, forming a first projected image 6 at a distance. When the first optical device 1 is in a second light-transmitting state, the polarization converter 11 converts the light source into emitted light in the second vibration direction. This emitted light, after passing through the second optical device 2, propagates along the second direction, forming a second projected image 7 at a close distance. Thus, the polarization converter 11 can convert the light source into emitted light with different vibration directions, thereby changing the propagation direction of the emitted light and realizing the switching of the projection mode of the projection module 100.

[0039] According to some embodiments of the present invention, with reference to Figure 1 In the first light-transmitting state, the first direction is the same as the projection direction of the emitted light. When the first optical device 1 is in the first light-transmitting state, after the light source passes through the first optical device 1 and the second optical device 2, the principal optical axis of the emitted light is parallel to the first direction, and the emitted light propagates in a straight line along the first direction without lateral deviation, effectively propagating to a farther position to form a clear, complete and stable first projected image 6, thus realizing the horizontal projection mode.

[0040] Reference Figure 2In the second light-transmitting state, the second direction intersects with the projection direction of the emitted light. When the first optical device 1 is in the second light-transmitting state, after the light source passes through the first optical device 1 and the second optical device 2, the emitted light propagates along the second direction, which facilitates the formation of a second projected image 7 on a certain area of ​​the ground, realizing the near-field projection welcoming and interactive functions.

[0041] According to some specific embodiments of the present invention, refer to Figure 1 and Figure 2 The second optical device 2 includes a polarization beam splitter 21. The polarization beam splitter 21 transmits outgoing light along a first vibration direction and reflects outgoing light along a second vibration direction. After the light source's vibration direction is changed by the polarization converter 11, it enters the polarization beam splitter 21. The polarization beam splitter 21 separates the outgoing light: one type is transmitted light (i.e., outgoing light along the first vibration direction), which is horizontally projected onto a distant surface to form a first projected image 6; the other type is reflected light (i.e., outgoing light along the second vibration direction), which is reflected by the polarization beam splitter 21 to form a second projected image 7 in a certain near-field area. Thus, light forms an image after sequentially passing through the polarization converter 11 and the polarization beam splitter 21, reducing the space required for the projection module 100 and facilitating adaptation to various vehicle models.

[0042] According to other specific embodiments of the present invention, refer to Figure 1 and Figure 2 The projection module 100 also includes a reflector 4. The reflector 4 is spaced apart from the polarization beam splitter 21. Along the light transmission direction, the reflector 4 is located downstream of the polarization beam splitter 21. The emitted light in the second vibration direction is reflected by the polarization beam splitter 21 and projected onto the reflector 4, and then reflected again by the reflector 4 to form a second projected image 7. When the first optical device 1 is in the second light-transmitting state, the emitted light is in the second vibration direction. The emitted light in the second vibration direction is incident on the second optical device 2 and reflected onto the reflector 4. The reflector 4 changes the propagation direction of the light, forming a second projected image 7 in a certain area in the near field. The reflector 4 is arranged along the propagation direction of the light reflected by the second optical device 2. Its installation position is precisely set, allowing for directional reflection of the light, ensuring accurate projection and confinement of the reflected light within a preset area to form the second projected image 7, thus ensuring a controllable range.

[0043] According to some embodiments of the present invention, with reference to Figure 1The plane containing the first end face 22 of the polarization beam splitter 21 and the plane containing the second end face 12 of the polarization converter 11 have a first preset angle. The first end face 22 is the light-receiving surface of the polarization beam splitter 21, and the second end face 12 is the light-emitting surface of the polarization converter 11. With this configuration, the first preset angle ensures that the light emitted from the polarization converter 11 is incident on the first end face 22 of the polarization beam splitter 21 along a predetermined path. After the light enters the polarization beam splitter 21 at an appropriate angle, it undergoes directional reflection, ultimately forming a second projected image 7 within a preset imaging range. This improves the projection accuracy of the projection module 100, reduces the size of the projection module 100, and enhances the stability and reliability of the optical path transmission. Furthermore, the first preset angle allows the emitted light in the first vibration direction and the second vibration direction to be spatially separated, ensuring that the propagation paths of the emitted light in the first vibration direction and the emitted light in the second vibration direction are independent.

[0044] The plane containing the third end face 41 of the reflector 4 is parallel to the first end face 22 of the polarization beam splitter 21. The third end face 41 is the light-receiving surface of the reflector 4, and the first end face 22 is the light-receiving surface of the polarization beam splitter 21. The light reflected by the polarization beam splitter 21 is incident on the third end face 41 of the reflector 4, and the light undergoes a second reflection. The plane containing the third end face 41 is parallel to the plane containing the first end face 22, and the deflection angles of the light reflected twice are uniform and regular, eliminating problems such as light path offset, beam divergence, and image distortion. The parallel first end face 22 and third end face 41 precisely control the light propagation trajectory, allowing the beam to be projected along a fixed path after two reflections, avoiding image misalignment and boundary blurring, and forming a second projected image 7 in a certain area nearby, improving the positioning accuracy and image regularity of the projection module 100, while simplifying the assembly and calibration difficulty.

[0045] The plane containing the first end face 22 of the polarization beam splitter 21 and the plane containing the second end face 12 of the polarization converter 11 have a first preset angle. The plane containing the third end face 41 of the reflector 4 and the plane containing the second end face 12 of the polarization converter 11 have a second preset angle. The second preset angle is greater than the first preset angle. The first end face 22 is the light-receiving surface of the polarization beam splitter 21, the second end face 12 is the light-emitting surface of the polarization converter 11, and the third end face 41 is the light-receiving surface of the reflector 4. The second preset angle is greater than the first preset angle, which can amplify the optical path polarization amplitude during the secondary reflection of light, form a strong beam convergence effect, shorten the beam projection transmission distance, and enable the beam to complete the optical path convergence without long-distance propagation, thereby reducing the space occupied by the projection module 100 and improving the imaging accuracy of the projection module 100.

[0046] According to a projection system of a second aspect embodiment of the present invention, referring to Figure 6 and Figure 7The system includes a projection module 100 and a controller according to the first aspect embodiment of the present invention. The controller is connected to the projection module 100 and is used to control the light transmission state of the first optical device 1 according to user instructions.

[0047] The controller receives and parses user commands, generates corresponding signals based on the user commands, and transmits the signals stably to the projection module 100. By adjusting the light transmission state of the first optical device 1 according to the light transmission requirements, the controller ensures that the light propagates in an orderly manner along a preset path, ultimately achieving precise adjustment and reliable output of the projected image.

[0048] According to the projection system of the present invention, after receiving and analyzing user instructions, the controller controls the light transmission state of the first optical device 1 of the projection module 100, thereby realizing mode switching of the projection module 100. This improves the automation level and control accuracy of the projection system. The projection system allows for precise adjustment of the light propagation path according to user needs, ensuring that the projection image is suitable for the application scenario, thus enhancing the user experience.

[0049] According to some embodiments of the present invention, with reference to Figure 7 The controller is configured to control the first optical device 1 to a first light-transmitting state when the user command is of the first type. When the user command is of the first type, the controller adjusts the first optical device 1 to the first light-transmitting state, thereby forming a first projected image 6 at a distance.

[0050] For example, when a user outputs a horizontal wall viewing command, the user command is of type 1. After receiving and analyzing the user command, the controller adjusts the working state of the first optical device 1 to the first light-transmitting state. The light source is converted into emitted light in the first vibration direction after passing through the first optical device 1. The emitted light in the first vibration direction passes through the second optical device 2 and forms a first projected image 6 horizontally at a distance.

[0051] The controller is configured to control the first optical device 1 to a second light-transmitting state when the user command is of the second type. When the user command is of the second type, the controller adjusts the first optical device 1 to the second light-transmitting state, thereby forming a second projected image 7 at close range.

[0052] For example, when a user outputs near-field projection commands such as a welcome function or interactive signage, the user command is of the second type. After receiving and analyzing the user command, the controller adjusts the working state of the first optical device 1 to the second light-transmitting state. The light is converted into emitted light in the second vibration direction by the first optical device 1. The emitted light in the second vibration direction is reflected by the second optical device 2 to the reflector 4. The reflector 4 reflects the light to the corresponding area to form the second projected image 7.

[0053] Thus, the controller controls the light transmission state of the first optical device 1 according to the type of user instruction, realizing precise switching of projection mode and stable output. In addition, the control method of the projection system has reliable control logic and rapid response, which helps to improve the user experience.

[0054] According to some embodiments of the present invention, with reference to Figure 7 The projection module 100 also includes a power component 3, which drives the first optical device 1 to switch between a first light-transmitting state and a second light-transmitting state. The controller is configured to: when the user command is of the first type, control the power component 3 to output a first initial angle to drive the first optical device 1 to rotate to the first light-transmitting state. When the user command is of the first type, the controller receives and analyzes the command, and then controls the power component 3 to output the first initial angle, so that the first optical device 1 is in the first light-transmitting state accordingly, so as to process the light source into emitted light in the first vibration direction. The emitted light in the first vibration direction passes through the second optical device 2 and forms a first projected image 6 on a distant horizontal wall.

[0055] The controller is configured to: when the user command is of the second type, control the power component 3 to output a second initial angle, and control the first optical device 1 to rotate to a second light-transmitting state. When the user command is of the second type, after receiving and analyzing the command, the controller controls the power component 3 to output a second initial angle; so that the first optical device 1 is in the second light-transmitting state accordingly, so as to process the light source into emitted light in the second vibration direction. The emitted light in the second vibration direction is reflected by the second optical device 2 to the reflector 4. The reflector 4 reflects the incident light to a certain area in the near field (e.g., within 1 meter to 6 meters of the near field ground) to form a second projected image 7, corresponding to the vehicle-mounted near-field projection welcome and interactive functions.

[0056] According to some embodiments of the present invention, the projection module 100 further includes a position sensor (not shown in the figure). The position sensor is used to acquire the angle information of the power component 3. The controller is configured to control the power component 3 to operate according to the angle information acquired by the position sensor, so as to output the corresponding initial angle. By detecting the angle information of the power component 3, the position sensor monitors the rotation angle of the first optical device 1, which is beneficial for the first optical device 1 to be accurately adjusted to the corresponding angle and for the precise switching of the projection module 100 mode.

[0057] According to some embodiments of the present invention, the projection system further includes a light source 5, which is connected to a controller and used for configuring the light source. The light source 5 can emit polarized or unpolarized light. The light source 5 can be an LED light source or a laser light source. When the light source 5 is an LED light source, the light source is unpolarized Lambertian light, and the corresponding first optical device 1 uses a linear polarizer. When the light source 5 is a laser light source, the corresponding first optical device 1 uses a half-wave plate.

[0058] The controller is configured to control the light source 5 to configure itself as a first-type light source when the user command is of the first type. When the user command is of the first type, the controller controls the light source 5 to be configured as a first-type light source, and the first-type light source is converted into emitted light in a first vibration direction by the first optical device 1.

[0059] The controller is configured to control the light source 5 to configure itself as a second type of light source when the user command is of the second type. When the user command is of the second type, the controller controls the light source 5 to be configured as a second type of light source, and the second type of light source is converted into emitted light in a second vibration direction by the first optical device 1.

[0060] In addition, the projection module 100 also includes an image output projection device 8, as shown in the reference. Figure 1 and Figure 2 An image output projection device 8 is located between the first optical device 1 and the light source 5. The image output projection device 8 receives the light emitted from the light source 5, uniformly transmits the light to its internal DMD (Digital Micromirror Device) chip, and finally projects and amplifies the light output to the first optical device 1. Based on DLP (Digital Light Processing) technology, the image output projection device 8 controls the on / off state and grayscale of the light through high-speed micromirror flipping, projects and amplifies the light emitted from the light source 5, and directs it to the first optical device 1, achieving high-fidelity, high-dynamic-range display. This ensures the light beam can be projected at an appropriate size and clarity, improving the projection effect and image quality.

[0061] The first optical device 1 can be disposed between the image output projection device 8 and the light source 5 (not shown in the figure). The light emitted from the light source 5 is polarized by the first optical device 1 before being projected onto the image output projection device 8. The image output projection device 8 projects, magnifies, and images the light, and projects it onto the second optical device 2 to achieve collimation and projection imaging of the light.

[0062] Therefore, after receiving a user command, the controller first identifies and judges the command type, distinguishes the functional mode corresponding to the current command according to the pre-set command parsing rules, and outputs the corresponding control signal based on the judgment result, thereby driving the first optical device 1 to perform the matching action, achieving precise control of the first optical device 1. Specifically, after receiving a user command, the controller performs logical judgment and command parsing: if a movie viewing mode trigger command is received, two sets of control signals are generated: one is to output a projection display command to the image output projection device 8, and the other is to output a drive signal (including motor rotation angle parameters) corresponding to the horizontal projection mode to the power component 3; if a welcome function or interactive sign command is received, the near-field projection mode requirement is determined, and two sets of control signals are generated simultaneously: one is to output a projection display command to the image output projection device 8, and the other is to output a drive signal (including motor rotation angle parameters) corresponding to the near-field projection mode to the power component 3.

[0063] In summary, referring to Figure 7 The following describes in detail the process of the projection system of the present invention, taking the light source 5 as an LED light source as an example: (1) User-initiated instructions, which include the first type (movie viewing instructions) and the second type (welcome / interactive sign instructions); (2) After receiving a user instruction, the controller determines the type of the user instruction; (3) Adjust the state of the power component 3 by means of the position sensor according to the type of instruction.

[0064] When the instruction type is Type 1 (movie viewing instruction): The controller determines that the instruction type is the first type; The position sensor detects whether the angle of the power component 3 is 0° (whether the power component 3 outputs the first initial angle). When the angle of the power component 3 is 0°, the power component 3 does not work; when the angle of the power component 3 is not 0°, the power component 3 drives the first optical device 1 to rotate to the 0° state (i.e., the first initial angle). The image output projection device 8 in the projection module 100 is configured with a viewing image source to project a viewing image onto a horizontal wall at a distance.

[0065] When the instruction type is the second type (welcome / interactive identifier instruction): The controller determines that the instruction type is the second type; The position sensor detects whether the angle of the power component 3 is 90° (whether the power component 3 outputs the second initial angle). When the angle of the power component 3 is 90°, the power component 3 does not work; when the angle of the power component 3 is not 90°, the power component 3 drives the first optical device 1 to rotate to 90°. The image output projection device 8 in the projection module 100 is equipped with a welcome / interactive image source to project a welcome / interactive image or signage into the corresponding near-field area.

[0066] A vehicle according to a third aspect of the present invention includes a projection module 100 according to a first aspect of the present invention, or a projection system according to a second aspect of the present invention.

[0067] According to the embodiments of the present invention, the vehicle adopts the above-mentioned projection module 100 and projection system, which reduces the installation space of the projection module 100, improves the response efficiency of the projection system, further optimizes the user's driving experience, enhances the vehicle's intelligence level and technological feel, and improves the vehicle's practicality and competitiveness.

[0068] In summary, by switching the light transmission state of the first optical device 1, the space occupied by the projection module 100 is reduced, improving space utilization and enabling the corresponding functions of the projection module 100, including movie viewing, near-field greeting, and interactive functions. Simultaneously, it solves the problem of limited application scenarios caused by the long projection distance of current smart projectors in the industry. Combined with the in-vehicle human-machine interaction system, it enables interactive functions such as outdoor games, enriching the projection function scenarios, enhancing the vehicle's intelligence and technological feel, and further optimizing the user's driving experience.

[0069] The projection module 100, projection system, and other components and operations of the vehicle according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0070] In the description of this invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0073] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A projection module, characterized in that, include: A first optical device, adapted to convert a light source into emitted light, the first optical device being switchable between a first light-transmitting state and a second light-transmitting state, wherein in the first light-transmitting state the emitted light is in a first vibration direction, and in the second light-transmitting state the emitted light is in a second vibration direction; A second optical device is provided at a distance from the first optical device. The second optical device is used to propagate the emitted light in the first vibration direction along a first direction to form a first projected image, and to propagate the emitted light in the second vibration direction along a second direction to form a second projected image. A reflector is provided at a distance from the second optical device. Along the light transmission direction, the reflector is located downstream of the second optical device. The light emitted in the second vibration direction is reflected by the second optical device and then projected onto the reflector, and then reflected again by the reflector to form the second projected image. The second projected image is closer to the first optical device than the first projected image; In the first light-transmitting state, the first direction is the same as the projection direction of the emitted light; and In the second light-transmitting state, the second direction intersects with the projection direction of the emitted light.

2. The projection module according to claim 1, characterized in that, Also includes: A power assembly, which is connected to the first optical device, is used to drive the first optical device to switch between the first light-transmitting state and the second light-transmitting state. The first optical device includes at least one of a polarizer and a half-wave plate.

3. The projection module according to claim 2, characterized in that, The power assembly includes: Drive components; A transmission assembly is provided, through which the driving component is connected to the first optical device.

4. The projection module according to claim 3, characterized in that, The transmission assembly includes a first transmission gear and a second transmission gear. The first optical device is mounted on the first transmission gear, and the second transmission gear is connected to the output shaft of the drive component. The first transmission gear and the second transmission gear mesh with each other.

5. The projection module according to claim 1, characterized in that, The first optical device includes: A polarization converter that can selectively convert the light source into emitted light projected along the first vibration direction or emitted light projected along the second vibration direction.

6. The projection module according to claim 5, characterized in that, The second optical device includes: A polarization beam splitter is used to transmit outgoing light along the first vibration direction and reflect outgoing light along the second vibration direction.

7. The projection module according to claim 6, characterized in that, There is a first preset angle between the plane containing the first end face of the polarization beam splitter and the plane containing the second end face of the polarization conversion element. The first end face is the light-receiving surface of the polarization beam splitter, and the second end face is the light-emitting surface of the polarization conversion element. The plane containing the third end face of the reflector is parallel to the first end face of the polarizing beam splitter. The third end face is the light-receiving surface of the reflector, and the first end face is the light-receiving surface of the polarizing beam splitter. Alternatively, the plane containing the first end face of the polarizing beam splitter and the plane containing the second end face of the polarizing converter have a first preset angle, and the plane containing the third end face of the reflector and the plane containing the second end face of the polarizing converter have a second preset angle, the second preset angle being greater than the first preset angle, the first end face being the light-receiving surface of the polarizing beam splitter, the second end face being the light-emitting surface of the polarizing converter, and the third end face being the light-receiving surface of the reflector.

8. A projection system, characterized in that, include: The projection module according to any one of claims 1-7; A controller, connected to the projection module, is used to control the light transmission state of the first optical device according to user instructions.

9. The projection system according to claim 8, characterized in that, The controller is configured to: When the user instruction is of the first type, the first optical device is controlled to be in the first light-transmitting state; When the user instruction is of the second type, the first optical device is controlled to be in the second light-transmitting state.

10. The projection system according to claim 9, characterized in that, The projection module further includes a power component, which drives the first optical device to switch between a first light-transmitting state and a second light-transmitting state. The controller is configured to: When the user instruction is of the first type, the power component is controlled to output a first initial angle to drive the first optical device to rotate to the first light-transmitting state; When the user command is of the second type, the power component is controlled to output a second initial angle, and the first optical device is controlled to rotate to the second light-transmitting state.

11. The projection system according to claim 10, characterized in that, The projection module also includes a position sensor, which is used to acquire angle information of the power component, and the controller is configured to: Based on the angle information obtained by the position sensor, the power component is controlled to operate and output the corresponding initial angle.

12. The projection system according to claim 9, characterized in that, It also includes a light source component, which is connected to the controller and used to configure the light source, the controller being configured to: When the user instruction is of the first type, the light source is controlled to configure the light source of the first type; When the user instruction is of the second type, the light source is controlled to configure a second type of light source.

13. A vehicle, characterized in that, include: The projection module according to any one of claims 1-7; or The projection system according to any one of claims 10-12; The first projected image corresponds to the vehicle-mounted horizontal projection mode; The second projected image corresponds to the vehicle-mounted near-field projection welcome and interactive functions.

Images