Intelligent projection lamp

Abstract

The application provides a kind of intelligent projection lamp, which has excellent projection quality, can realize large-format dynamic projection, and supports rich dynamic information interaction scene.The intelligent projection lamp includes light source module, compound eye lens, relay lens group, right-angle prism, digital micromirror device and Scheimpflug projection lens arranged in sequence along the light beam propagation path, wherein the light source module, the compound eye lens and the relay lens group are sequentially arranged along the first direction, the relay lens group, the right-angle prism and the digital micromirror device are sequentially arranged along the second direction; the Scheimpflug projection lens is opposite to the second surface of the right-angle prism, the angle between the optical axis of the Scheimpflug projection lens and the first direction is 1° to 2°, and the optical axis of the Scheimpflug projection lens is perpendicular to the second direction.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting technology, and in particular to an intelligent projection lamp. Background Technology

[0002] With the continuous development of automotive interior lighting technology, ambient lighting has become an important feature for enhancing the driving and riding experience. Carpet lights (also known as welcome lights or intelligent projection lights), as a type of ambient lighting installed on the exterior of vehicles, can project brand logos, patterns, or text information onto the ground, combining functions such as a welcoming ceremony, brand display, and safety warning. They have become one of the important features for mid-to-high-end models to showcase personalization and luxury.

[0003] Traditional carpet lights typically use film and microlens array (MLA) projection technology. Due to the limitations of physical imaging principles, they can only support fixed static pattern output and cannot achieve dynamic display effects. Furthermore, the resolution of patterns or text is low, making it difficult to present high-quality visual effects.

[0004] The content of the background section is merely the technology known to the inventor and does not necessarily represent the prior art in this field. Summary of the Invention

[0005] To address one or more deficiencies in existing technologies, this invention provides an intelligent projection lamp, comprising a light source module, a compound eye lens, a relay lens group, a right-angle prism, a digital micromirror device, and a Sham projection lens arranged sequentially along the beam propagation path, wherein... The light source module, the compound eye lens, and the relay lens group are arranged sequentially along the first direction, and the relay lens group, the right-angle prism, and the digital micromirror device are arranged sequentially along the second direction. The right-angle prism includes a first surface, a second surface, and a third surface, wherein the first surface is perpendicular to the second direction, and the second surface is perpendicular to the first direction; The light source module is configured to emit an illumination beam along a first direction; The compound eye lens is configured to receive the illumination beam and split the illumination beam into multiple sub-beams; The relay lens group is opposite to the third face of the right-angle prism. The relay lens group is configured to receive and modulate the multi-beam sub-beam, so that the multi-beam sub-beam is incident on the third face at a preset angle. The right-angle prism is configured to receive and refract the multiple sub-beams through the third surface, so that the multiple sub-beams exit from the first surface; The digital micromirror device is opposite to the first surface of the right-angle prism, and the digital micromirror device is configured to receive the multiple sub-beams and selectively reflect them to generate an image beam. The right-angle prism is further configured to receive the image beam through the first surface and reflect the image beam through the third surface, so that the image beam exits from the second surface; The SAM projection lens is opposite to the second surface of the right-angle prism, and the angle between the optical axis of the SAM projection lens and the first direction is 1° to 2°, and the optical axis of the SAM projection lens is perpendicular to the second direction. The total length of the SAM projection lens is 52mm to 54mm, and the effective focal length of the SAM projection lens is 9mm to 10mm. The SAM projection lens is configured to receive the image beam and project the image beam onto the target projection surface.

[0006] According to one aspect of the present invention, the light source module includes a first light source, a second light source, a third light source, a first filter, and a second filter, wherein, The first light source is configured to emit a first wavelength beam in the opposite direction to the second direction; The first filter and the second filter are sequentially disposed in the optical path of the first wavelength beam in the opposite direction to the second direction. The first filter is configured to transmit the first wavelength beam, and the second filter is configured to reflect the first wavelength beam in the first direction. The second light source is disposed opposite to the first filter. The second light source is configured to emit a second wavelength light beam along a first direction. The first filter is configured to reflect the second wavelength light beam in the opposite direction of the second direction. The second filter is configured to reflect the second wavelength light beam in the first direction. The third light source is disposed opposite to the second filter, the third light source is configured to emit a third wavelength light beam along a first direction, and the second filter is configured to transmit the third wavelength light beam; The first wavelength beam, the second wavelength beam, and the third wavelength beam are combined at the second filter to form the illumination beam that propagates along the first direction.

[0007] According to one aspect of the present invention, the first wavelength beam is a blue light beam, the second wavelength beam is a green light beam, and the third wavelength beam is a red light beam.

[0008] According to one aspect of the present invention, the first light source, the second light source and the third light source are each configured with a collimating lens assembly, the combined focal length of the collimating lens assembly being 7.1 mm to 7.5 mm.

[0009] According to one aspect of the invention, the collimating lens assembly includes: A first collimating lens, which is a spherical lens, has a refractive index of 1.81 to 1.85, a dispersion coefficient greater than 40, and a focal length of 7.1 mm to 7.4 mm; and The second collimating lens is an aspherical lens with a refractive index of 1.5 to 1.7, a dispersion coefficient greater than 50, and a focal length of 10.9 mm to 11.2 mm.

[0010] The first collimating lens and the second collimating lens are arranged sequentially in the first direction, or the first collimating lens and the second collimating lens are arranged sequentially in the opposite direction to the second direction.

[0011] According to one aspect of the invention, the relay lens assembly includes a first relay lens, a reflecting mirror, and a second relay lens arranged sequentially along the propagation path of the sub-beam, wherein... The first relay lens is configured to converge the multiple sub-beams; The reflector is configured to reflect the multi-beam sub-beam; The second relay lens is configured to converge the multiple sub-beams, so that the multiple sub-beams are incident on the third surface at a preset angle; The combined focal length of the first relay lens and the second relay lens is 25mm to 35mm, and it has positive optical power.

[0012] According to one aspect of the invention, the first relay lens is a spherical lens with an angle of 6° to 7° with the second direction, a refractive index of 1.8 to 2.0, a dispersion coefficient of less than 30, and a focal length of 45 to 55 mm. The angle between the reflector and the second direction is 45°; The second relay lens is a spherical lens with an angle of -68° to -69° with the second direction, a refractive index of 1.6 to 1.7, a dispersion coefficient of less than 35, and a focal length of 30 to 40 mm.

[0013] According to one aspect of the invention, the Sham projection lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially in a first direction.

[0014] According to one aspect of the invention, the Sham projection lens has an aperture number of 2.1 to 2.3, a horizontal field of view of 39.7° to 40.3°, and a vertical field of view of 19.7° to 20.3°. Preferably, the Sham projection lens has an aperture number of 2.2.

[0015] According to one aspect of the present invention, the intelligent projection lamp further includes a freeform mirror disposed between the compound eye lens and the relay lens group. The freeform mirror is configured to modulate the multi-beam sub-beams so that the multi-beam sub-beams form light spots with differentiated brightness distribution on the digital micromirror device, thereby ensuring uniform brightness of the projected image.

[0016] According to one aspect of the present invention, the smart projection lamp further includes a bottom shell and a top cover, the bottom shell and the top cover defining a mounting cavity; The bottom shell includes a main body and a protrusion. The projection of the main body onto a first plane is approximately rectangular. The protrusion is disposed on the central axis of the main body. The first plane is parallel to the first direction and the second direction. The light source module, the compound eye lens, the relay lens group, the right-angle prism, and the digital micromirror device are installed inside the bottom shell, and the SAM projection lens is installed inside the protrusion.

[0017] According to one aspect of the present invention, the smart projection lamp further includes a first heat sink and a second heat sink, the main body includes a bottom wall and a side wall, the side wall is disposed on one side of the bottom wall, the bottom wall and the side wall together form a first mounting groove, a second mounting groove is formed on the outer side of the side wall, and the second mounting groove communicates with the first mounting groove. The light source module, the compound eye lens, the relay lens group, and the right-angle prism are disposed in the first mounting slot; The digital micromirror device is disposed in the second mounting slot; The upper cover covers the first mounting groove and forms a corresponding first mounting cavity; The first heat sink is disposed on the outside of the main body and abuts against the digital micromirror device. The first heat sink and the upper cover cover the second mounting groove and form a corresponding second mounting cavity. The second heat sink is connected to the side of the main body away from the protrusion.

[0018] Compared with existing technologies, embodiments of the present invention provide an intelligent projection lamp that can be used as a carpet light in a car. It boasts excellent projection quality, enables large-format dynamic projection, and supports a wide range of dynamic information interaction scenarios. For example, in pedestrian crossing scenarios, preset prompts such as "Safe to cross the road" can be projected, providing intuitive and immediate visual communication with pedestrians. In vehicle driving / stopping scenarios, preset prompts such as "Right-side passenger door is about to open" or "Vehicle is about to change lanes to the right" can be projected, effectively eliminating tension, hesitation, or misjudgment caused by information asymmetry, significantly reducing the risk of accidents such as scrapes and collisions. In emergency vehicle passage scenarios, fire trucks, ambulances, or police cars can use ground projection to display their routes and intentions in real time, such as "Please keep to the right" or "About to overtake on the left," guiding other vehicles to give way. Compared to common carpet lights, the intelligent projection lamp of the present invention exhibits significantly superior advantages in the accuracy, immediacy, and broad scenario adaptability of information transmission. Meanwhile, the intelligent projection lamp of the present invention can be installed on the left and right sides of the vehicle in a rotationally symmetrical arrangement, thereby reducing mold development costs and material management costs. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of a smart projection lamp consistent with some embodiments of the present invention is shown; Figure 2 A side view of a smart projection lamp consistent with some embodiments of the present invention is shown; Figure 3 A schematic diagram of a smart projection lamp consistent with other embodiments of the present invention is shown; Figure 4 A schematic diagram of a smart projection lamp consistent with some other embodiments of the present invention is shown; Figure 5 A partial structural schematic diagram of a smart projection lamp consistent with some other embodiments of the present invention is shown. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly 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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] This invention provides an intelligent projection lamp, comprising a light source module, a compound eye lens, a relay lens group, a right-angle prism, a digital micromirror device, and a Sham projection lens arranged sequentially along the beam propagation path, wherein... The light source module, compound eye lens, and relay lens group are arranged sequentially along the first direction, while the relay lens group, right-angle prism, and digital micromirror device are arranged sequentially along the second direction. A right-angle prism includes a first face, a second face, and a third face, wherein the first face is perpendicular to the second direction, and the second face is perpendicular to the first direction; The light source module is configured to emit an illumination beam along a first direction; The compound eye lens is configured to receive the illumination beam and split the illumination beam into multiple sub-beams; The relay lens group is opposite to the third face of the right-angle prism. The relay lens group is configured to receive and modulate multiple sub-beams so that the multiple sub-beams are incident on the third face at a preset angle. The right-angle prism is configured to receive and refract multiple beams of light through the third surface, so that the multiple beams of light are emitted from the first surface; The digital micromirror device faces the first face of the right-angle prism. The digital micromirror device is configured to receive multiple sub-beams and selectively reflect them to generate an image beam. The right-angle prism is also configured to receive the image beam through the first surface and reflect the image beam through the third surface, so that the image beam exits from the second surface; The SAM projection lens faces the second face of the right-angle prism, and the angle between the optical axis of the SAM projection lens and the first direction is 1° to 2°, and the optical axis of the SAM projection lens is perpendicular to the second direction. The total length of the SAM projection lens is 52mm to 54mm, and the effective focal length of the SAM projection lens is 9mm to 10mm. The SAM projection lens is configured to receive the image beam and project the image beam onto the target projection surface.

[0027] In this invention, the intelligent projection lamp possesses excellent projection quality, enabling large-format dynamic projection and supporting a wide range of dynamic information interaction scenarios. Compared to common dynamic projection technologies, this solution demonstrates superior advantages in the accuracy, immediacy, and broad applicability of information delivery.

[0028] For ease of description later, this invention defines a spatial rectangular coordinate system o-xyz, where the positive direction of the z-axis is the first direction, the positive direction of the y-axis is the second direction, and the positive direction of the x-axis is the third direction.

[0029] Figure 1 A front view of a smart projection lamp 100 consistent with some embodiments of the present invention is shown. Figure 2 A side view of a smart projection lamp 100 consistent with some embodiments of the present invention is shown. (See attached image.) Figure 1 and Figure 2 As shown, the intelligent projection lamp 100 includes a light source module 110, a compound eye lens 120, a repeater lens group 130, a right-angle prism 140, a digital micromirror device 150, and a SAM projection lens 160, arranged sequentially along the propagation path of the light beam (illumination beam + image beam). The light source module 110, compound eye lens 120, and repeater lens group 130 are arranged sequentially along a first direction. The repeater lens group 130, right-angle prism 140, and digital micromirror device 150 are arranged sequentially along a second direction.

[0030] like Figure 1 As shown, the right-angle prism 140 is a total internal reflection (TIR) ​​prism used to separate the illumination light path (the light path of the illumination beam (including sub-beams)) from the imaging light path (the light path of the image beam). The right-angle prism 140 includes a first surface 141, a second surface 142, and a third surface 143; wherein, the first surface 141 is perpendicular to the second direction, and the second surface 142 is perpendicular to the first direction; the third surface 143 is inclined relative to the first surface 141 / second surface 142, and the third surface 143 is a reflecting surface. When the angle of the incident light is greater than the critical angle of total internal reflection of the third surface 143, the incident light will be completely reflected; when the angle of the incident light is less than the critical angle of total internal reflection, the incident light will be completely transmitted.

[0031] like Figure 1As shown, the light source module 110 emits an illumination beam along a first direction. A compound eye lens 120 is located on the light-emitting side of the light source module 110, with its optical axis parallel to the first direction and its incident surface perpendicular to the first direction. The compound eye lens 120 can receive the illumination beam and split it into multiple sub-beams to achieve uniform illumination. A relay lens is located between the light-emitting side of the compound eye lens 120 and the right-angle prism 140, and faces the third surface 143 of the right-angle prism 140. The relay lens group 130 can receive the multiple sub-beams emitted by the compound eye lens 120 and modulate them so that they are incident on the third surface 143 of the right-angle prism 140 at a preset angle. The right-angle prism 140 can receive and refract the multiple beams through its third surface 143, causing them to exit from the first surface 141 of the right-angle prism 140 at a preset angle.

[0032] like Figure 1 As shown, the digital micromirror device 150 (DMD) is an optical switch device based on microelectromechanical systems (MEMS) technology. The DMD 150 is disposed opposite to the first surface 141 of the right-angle prism 140, such that multiple sub-beams emitted from the first surface 141 of the right-angle prism 140 can form a uniform light spot on the DMD 150. Accordingly, the DMD 150 can receive these sub-beams and selectively reflect them to generate an image beam, and cause the image beam to be incident on the first surface 141 of the right-angle prism 140 at a preset angle. Correspondingly, the right-angle prism 140 receives the image beam through the first surface 141 and reflects the image beam through the third surface 143, causing the image beam to exit from the second surface 142 at a preset angle.

[0033] For example, the digital micromirror device 150 includes multiple micromirror units arranged in an array. By controlling these micromirror units to switch between an ON state and an OFF state, the illumination beam can be selectively reflected and the desired image beam can be generated. By controlling each micromirror unit to be in different on / off states at different times, different image beams can be generated, thereby realizing dynamic image projection.

[0034] like Figure 1 As shown, the SAM projection lens 160 faces the second surface 142 of the right-angle prism 140 and is capable of receiving the image beam emitted from the first surface 141 of the right-angle prism 140. Furthermore, the total length of the SAM projection lens 160 is 52mm to 54mm, the effective focal length is 9mm to 10mm, and the angle between the optical axis of the SAM projection lens 160 and the first direction is 1° to 2°, while the optical axis of the SAM projection lens 160 is perpendicular to the second direction. This allows the image beam to be projected onto the target projection surface under tilted projection conditions, ensuring a clear image on the target projection surface and achieving large-format dynamic projection.

[0035] Based on the coordinated configuration of the aforementioned optical components, the intelligent projection lamp 100 of this invention can achieve high-quality large-format dynamic projection and support rich dynamic information interaction scenarios. For example, in pedestrian crossing scenarios, preset prompts such as "It is safe to cross the road" can be projected, enabling intuitive and immediate visual communication with pedestrians. For example, in vehicle driving / stopping scenarios, preset prompts such as "The passenger on the right is about to open the door" or "The vehicle is about to change lanes to the right" can be projected, effectively eliminating tension, hesitation, or misjudgment caused by information asymmetry, and significantly reducing the risk of accidents such as scrapes and collisions. For example, in emergency vehicle passage scenarios, fire trucks, ambulances, or police cars can display their driving routes and intentions in real time through ground projection, such as "Please keep to the right" or "About to overtake on the left," guiding other vehicles to give way in a timely manner. It should be noted that the above application scenarios are merely illustrative examples, and this invention is not limited thereto.

[0036] In some embodiments, such as Figure 1 As shown, the light source module 110 includes a first light source 111, a second light source 112, a third light source 113, a first filter 114, and a second filter 115. The first light source 111, the second light source 112, and the third light source 113 can be solid-state light-emitting devices, such as light-emitting diodes, laser diodes, or organic light-emitting diodes. The first light source 111, the second light source 112, and the third light source 113 emit different wavelengths to provide illumination beams of different colors. Specifically, the first light source 111 is configured to emit a first wavelength beam, the second light source 112 is configured to emit a second wavelength beam, and the third light source 113 is configured to emit a third wavelength beam. Figure 1 The first, second, and third wavelength beams are shown in red lines. For example, the first wavelength beam is a blue beam with a wavelength of 410 nm to 475 nm; the second wavelength beam is a green beam with a wavelength of 505 nm to 580 nm; and the third wavelength beam is a red beam with a wavelength of 615 nm to 700 nm. The first filter 114 and the second filter 115 can use flat glass as a substrate, with band-specific coatings on the substrate surface, such that the first filter 114 can transmit the first wavelength beam and reflect the second wavelength beam; and the second filter 115 can transmit the third wavelength beam and reflect the first and second wavelength beams. Preferably, the flat glass has a refractive index of 1.5 to 1.53 and a dispersion coefficient greater than 50.

[0037] like Figure 1As shown, the first light source 111 is further configured to emit a first wavelength beam in the opposite direction to the second direction, where the opposite direction to the second direction refers to the negative direction of the y-axis in the spatial rectangular coordinate system o-xyz. Correspondingly, the first filter 114 and the second filter 115 are sequentially arranged in the optical path of the first wavelength beam in the opposite direction to the second direction, and each forms a 45° angle with the second direction. After the first light source 111 emits the first wavelength beam, the first wavelength beam is transmitted through the first filter 114, and its propagation direction remains unchanged; subsequently, the first wavelength beam is incident on the second filter 115 and reflected by the second filter 115 in the first direction.

[0038] like Figure 1 As shown, the second light source 112 is disposed opposite to the first filter 114 and is further configured to emit a second wavelength beam along a first direction. After the second light source 112 emits the second wavelength beam, the second wavelength beam is incident on the first filter 114 and reflected by the first filter 114 in a second direction; subsequently, the second wavelength beam is incident on the second filter 115 and reflected by the second filter 115 in the first direction.

[0039] like Figure 1 As shown, the third light source 113 is positioned opposite to the second filter 115 and is further configured to emit a third wavelength beam along the first direction. After the third light source 113 emits the third wavelength beam, the third wavelength beam is transmitted through the first filter 114, and the propagation direction remains unchanged. It should be noted that after reflection or transmission through the second filter 115, the first wavelength beam, the second wavelength beam, and the third wavelength beam are combined to form an illumination beam propagating along the first direction. Furthermore, the first light source 111, the first filter 114, and the second filter 115 are arranged sequentially in the opposite direction to the second direction, which can effectively reduce the size of the smart projection lamp 100 in the second direction and place the SAM projection lens 160 approximately on the central axis of the optical system of the smart projection lamp 100. This allows smart projection lamps 100 of the same specification to be installed on the left and right sides of the vehicle in a rotationally symmetrical arrangement (i.e., the smart projection lamp on the left side of the vehicle and the smart projection lamp on the right side of the vehicle are arranged in a rotationally symmetrical manner), thereby reducing mold development costs and material management costs.

[0040] In some embodiments, the first light source 111, the second light source 112, and the third light source 113 are configured with collimating lens assemblies 117 of the same specifications, and the combined focal length of the collimating lens assemblies 117 is 7.1 mm to 7.5 mm.

[0041] It should be noted that the collimating lens assembly 117 corresponding to the first light source 111 is located between the first light source 111 and the first filter 114; the collimating lens assembly 117 corresponding to the second light source 112 is located between the second light source 112 and the first filter 114; and the collimating lens assembly 117 corresponding to the third light source 113 is located between the third light source 113 and the second filter 115. The combined focal length of the collimating lens assembly 117 is designed to precisely match the light output requirements of the first light source 111, the second light source 112, and the third light source 113, avoiding both excessively short combined focal lengths that lead to over-collimation of the beam and the generation of hot spots due to energy concentration, and excessively long focal lengths that lead to insufficient beam parallelism and decreased light combining efficiency.

[0042] In some embodiments, such as Figure 1 As shown, the collimating lens assembly 117 mainly includes a first collimating lens 1171 and a second collimating lens 1172. In the collimating lens assembly 117 corresponding to the first light source 111, the first collimating lens 1171 and the second collimating lens 1172 are arranged sequentially in the opposite direction of the second direction. In the collimating lens assembly 117 corresponding to the second light source 112 / third light source 113, the first collimating lens 1171 and the second collimating lens 1172 are arranged sequentially in the first direction. The first collimating lens 1171 is a spherical lens made of glass with a refractive index of 1.81 to 1.85 and a dispersion coefficient greater than 40. Its focal length is 7.1 mm to 7.4 mm, and it has positive optical power. The second collimating lens 1172 is an aspherical lens made of glass with a refractive index of 1.5 to 1.7 and a dispersion coefficient greater than 50. Its focal length is 10.9 mm to 11.2 mm, and it also has positive optical power. The first collimating lens 1171 employs a high refractive index and a low dispersion coefficient, while the second collimating lens 1172 uses a low refractive index and a high dispersion coefficient. These two lenses complement each other in dispersion, effectively correcting beam chromatic aberration and ensuring precise superposition of the subsequent first, second, and third wavelength beams, preventing color shifts and ultimately improving the beam combining effect. Furthermore, the focal length design of the first and second collimating lenses 1171 and 1172 enables step-by-step convergence and collimation of light, further enhancing beam parallelism.

[0043] In some embodiments, the compound eye lens 120 includes a first surface facing the light source module 110 and a second surface facing away from the light source module 110. Both the first and second surfaces are arrayed with multiple microlenses, each microlens being spherical. When the illumination beam passes through the compound eye lens 120, it is split into multiple sub-beams (narrow beams). The slight non-uniformity of each sub-beam is compensated by the superposition of the symmetrically positioned sub-beams, thereby ensuring efficient and uniform utilization of the light energy of the illumination beam.

[0044] In some embodiments, such as Figure 1 As shown, the relay lens group 130 includes a first relay lens 131, a reflector 132, and a second relay lens 133 arranged sequentially along the propagation path of the sub-beam. The reflector 132 is used to change the propagation direction of the illumination beam (sub-beam). The first relay lens 131 and the second relay lens 133 are used in conjunction with the compound eye lens 120 to homogenize the illumination beam and optimize the light field distribution of the illumination beam, ensuring that the illumination beam (sub-beam) is accurately focused on the micromirror array of the digital micromirror device 150, thereby ensuring the clarity of the projected image.

[0045] For example, the first relay lens 131 is a spherical lens made of glass, with an angle of 6° to 7° to the second direction, a refractive index of 1.8 to 2.0, a dispersion coefficient of less than 30, and a focal length of 45 to 55 mm, capable of effectively converging multiple beams of light from the compound eye lens 120. The reflector 132 has an angle of 45° to the second direction and can reflect multiple beams of light from the first relay lens 131 to the second relay lens 133. The second relay lens 133 is a spherical lens made of glass, with an angle of -68° to -69° to the second direction, a refractive index of 1.6 to 1.7, a dispersion coefficient of less than 35, and a focal length of 30 to 40 mm, capable of effectively converging multiple beams of light from the reflector 132 and causing the multiple beams of light to be incident on the third surface 143 of the right-angle prism 140 at a preset angle. The combined focal length of the first relay lens 131 and the second relay lens 133 is 25mm to 35mm, and they have positive optical power, which ensures that the relay lens group 130 as a whole effectively converges the light beam and matches the illumination spot with the micromirror array of the digital micromirror device 150. The first relay lens 131 is designed with a high refractive index and a low dispersion coefficient, which is beneficial for compressing the lens thickness at a long focal length and achieving initial convergence and aberration control of the sub-beam. The second relay lens 133 is designed with a low refractive index and a high dispersion coefficient, which can form chromatic aberration protection with the first relay lens 131. The tilt angle of the first relay lens 131, the reflector 132, and the second relay lens 133 relative to the second direction ensures that the illumination beam (sub-beam) is accurately incident on the third surface 143 of the right-angle prism 140 at a preset angle (less than the critical angle of total internal reflection of the third surface 143 of the right-angle prism 140).

[0046] In some embodiments, such as Figure 1 and Figure 2As shown, the SAM projection lens 160 includes a first lens 161, a second lens 162, a third lens 163, a fourth lens 164, and a fifth lens 165 arranged sequentially in a first direction. Preferably, the first lens 161, the second lens 162, the third lens 163, the fourth lens 164, and the fifth lens 165 are all spherical lenses made of glass, and the transmittance of these lenses is greater than 99.5% to reduce light loss and improve projection brightness. Preferably, the diameter of the first lens 161 is less than 18 mm, and the diameter of the fifth lens 165 is less than 12.6 mm to meet the miniaturization design requirements of the intelligent projection lamp 100, while reducing the generation of stray light at the edge of the light-emitting end. Preferably, the aperture number of the SAM projection lens 160 is 2.1 to 2.3, the horizontal field of view is 39.7° to 40.3°, and the vertical field of view is 19.7° to 20.3° to increase the amount of light entering and expand the field of view coverage, thereby achieving a large-format projection effect. Preferably, the aperture number of the Sham projection lens 160 is 2.2.

[0047] In some embodiments, such as Figure 1 and Figure 2 As shown, the SAM projection lens 160 also includes a first aperture stop 166, a second aperture stop 167, and a third aperture stop 168. The first aperture stop 166 is positioned between the first lens 161 and the second lens 162 to block stray light. The second aperture stop 167 is positioned between the third lens 163 and the fourth lens 164, and the distance between the second aperture stop 167 and the third lens 163 is 0.3mm to 0.36mm. The second aperture stop 167 is an aperture stop used to precisely control the light intake range, improving image contrast and clarity. The third aperture stop 168 is positioned downstream of the optical path of the fifth lens 165 to block stray light.

[0048] Figure 3 A schematic diagram of a smart projection lamp 200 consistent with other embodiments of the present invention is shown. For example... Figure 3 As shown, the intelligent projection lamp 200 includes a light source module 210, a compound eye lens 220, a repeater lens group 230, a right-angle prism 240, a digital micromirror device 250, and a SAM projection lens 260. The light source module 210, compound eye lens 220, repeater lens group 230, right-angle prism 240, digital micromirror device 250, and SAM projection lens 260 can adopt the same or similar structures, functions, and arrangements as their corresponding components in the intelligent projection lamp 200, which will not be elaborated further here. In addition, the intelligent projection lamp 200 also includes a freeform mirror 270, which is positioned between the compound eye lens 220 and the repeater lens group 230. The freeform mirror 270 is used to modulate the multiple sub-beams emitted from the compound eye lens 220, so that these sub-beams ultimately form a light spot with differentiated brightness distribution on the digital micromirror device 250, thereby improving the non-uniformity inevitably caused by large-angle oblique projection and ensuring uniform brightness of the projected image.

[0049] In some embodiments, such as Figure 3 As shown, the freeform mirror 270 includes a first curved surface 271 facing the compound eye lens 220 and a second curved surface 272 facing away from the compound eye lens 220. The first curved surface 271 is a cylindrical surface with its generatrix parallel to a third direction, and the radius of curvature of the cylindrical surface in the first direction is 133.1 mm. The surface shape XY polynomial of the second curved surface 272 is: r = -168.562; k = 0; c = 1 / r; y2 = 0.017; y4 = -4.4155 * 10 -5 x1 = 0.0263; x2 = 0.00343; x3 = 0.00099; x4 = -5.7424 * 10 -5 x5 = -9.7064 * 10 -5 x²y² = -3.3486 * 10 -5 x²y⁴ = -1.0845 * 10 -5 x4y4=4.4595*10 -5 The surface shape expression for the second surface 272 is: Substituting the aforementioned surface polynomial XY into the surface expression yields the surface shape.

[0050] Figure 4 A schematic diagram of a smart projection lamp 300 consistent with some other embodiments of the present invention is shown. Figure 5 A partial structural schematic diagram of a smart projection lamp 300 consistent with some other embodiments of the present invention is shown. For example... Figure 4 and Figure 5 As shown, the intelligent projection lamp 300 includes a light source module 310, a compound eye lens 320, a relay lens group 330, a right-angle prism 340, a digital micromirror device 350, and a SAM projection lens. The light source module 310, compound eye lens 320, relay lens group 330, right-angle prism 340, digital micromirror device 350, and SAM projection lens (not shown in the figure) can adopt the same or similar structures, functions, and arrangements as their corresponding structures (devices) in the intelligent projection lamp 100, which will not be elaborated further here. In addition, the intelligent projection lamp 300 may also include a freeform surface mirror (not shown in the figure). The freeform surface mirror can adopt the same or similar structures, functions, and arrangements as its corresponding structures (devices) in the intelligent projection lamp 200, which will not be elaborated further here.

[0051] like Figure 4 and Figure 5As shown, the smart projection lamp 300 may also include a bottom shell 370 and a top cover 380. The bottom shell 370 and the top cover 380 define a mounting cavity for mounting components such as the light source module 310 and providing mechanical protection for these components. Specifically, the bottom shell 370 includes a main body 371 and a protrusion 372. The projection of the main body 371 onto a first plane is approximately rectangular, wherein the first plane is parallel to a first direction and a second direction, that is, the first plane is parallel to the zoy plane in the spatial rectangular coordinate system o-xyz. The protrusion 372 is located at the first end of the main body 371 and is situated on the central axis of the main body 371. The light source module 310, compound eye lens 320, relay lens group 330, right-angle prism 340, and digital micromirror device 350 are mounted within the bottom shell 370, and the SAM projection lens is mounted within the protrusion 372. This allows the smart projection lamp 300 of the same specification to be adapted for installation on the left and right sides of a vehicle, thereby reducing mold development costs and material management costs.

[0052] In some embodiments, such as Figure 4 and Figure 5 As shown, the main body 371 includes a bottom wall 3711 and a side wall 3712. The bottom wall 3711 is designed as a rectangular structure. The side wall 3712 is located on the upper side of the bottom wall 3711 and is designed as a ring structure. The bottom wall 3711 and the side wall 3712 together form a first mounting groove 373; at the same time, the upper cover 380 covers the first mounting groove 373, and the upper cover 380, the bottom wall 3711, and the side wall 3712 together form a first mounting cavity 374. In addition, a second mounting groove 375 is formed on the outer side of the side wall 3712, and the second mounting groove 375 is interconnected with the first mounting groove 373. The light source module 310, the compound eye lens 320, the relay lens group 330, and the right-angle prism 340 are disposed in the first mounting groove 373; the digital micromirror device 350 is disposed in the second mounting groove 375. Those skilled in the art will readily understand that both the digital micromirror device 350 and the light source module 310 generate heat during operation. By installing the digital micromirror device 350 and the light source module 310 in different mounting slots, heat source isolation can be achieved to a certain extent, thereby avoiding heat concentration and improving heat dissipation efficiency. At the same time, it can also prevent the micromirror unit from flipping abnormally due to excessive temperature of the digital micromirror device 350, and prevent the wavelength drift of the light source module 310 from adversely affecting the imaging quality of the optical system.

[0053] The intelligent projection lamp 300 may further include a first heat sink 391 and a second heat sink 392. The first heat sink 391 is disposed on the outer side of the main body 371 and abuts against the digital micromirror device 350 to conduct the heat generated by the digital micromirror device 350 to the external environment. Simultaneously, the first heat sink 391 also abuts against a portion of the sidewall 3712 of the main body 371 to conduct the heat generated by the light source module 110 to the external environment, accelerating the heat dissipation of the light source module 110. Furthermore, the first heat sink 391 and the upper cover 380 cover the second mounting groove 375, and the first heat sink 391, the upper cover 380, and the sidewall 3712 together form the second mounting cavity 376. The second heat sink 392 is connected to the side of the main body 371 away from the protrusion 372 to conduct the heat generated by the light source module 110 to the external environment, accelerating the heat dissipation of the light source module 110.

[0054] In some embodiments, such as Figure 4 and Figure 5 As shown, the bottom wall 3711 of the main body 371 is provided with a plurality of mounting holes 377 to facilitate the installation of the smart projection lamp 300 at a predetermined position on the vehicle. Preferably, at least some of the mounting holes 377 are symmetrical about the central axis of the main body 371, thereby enabling smart projection lamps 300 of the same specifications to be adapted for installation on the left and right sides of the vehicle, thereby reducing mold development costs and material management costs.

[0055] Compared with existing technologies, embodiments of the present invention provide a smart projector with superior projection quality, capable of large-format dynamic projection, and supporting a wide range of dynamic information interaction scenarios. Compared with common smart projectors, the smart projector of the present invention exhibits more prominent advantages in the accuracy, immediacy, and breadth of scene adaptation of information transmission.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart projection lamp, comprising a light source module, a compound eye lens, a relay lens group, a right-angle prism, a digital micromirror device, and a Sham projection lens arranged sequentially along the beam propagation path, wherein, The light source module, the compound eye lens, and the relay lens group are arranged sequentially along the first direction, and the relay lens group, the right-angle prism, and the digital micromirror device are arranged sequentially along the second direction. The right-angle prism includes a first surface, a second surface, and a third surface, wherein the first surface is perpendicular to the second direction, and the second surface is perpendicular to the first direction; The light source module is configured to emit an illumination beam along a first direction; The compound eye lens is configured to receive the illumination beam and split the illumination beam into multiple sub-beams; The relay lens group is opposite to the third face of the right-angle prism. The relay lens group is configured to receive and modulate the multi-beam sub-beam, so that the multi-beam sub-beam is incident on the third face at a preset angle. The right-angle prism is configured to receive and refract the multiple sub-beams through the third surface, so that the multiple sub-beams exit from the first surface; The digital micromirror device is opposite to the first surface of the right-angle prism, and the digital micromirror device is configured to receive the multiple sub-beams and selectively reflect them to generate an image beam. The right-angle prism is further configured to receive the image beam through the first surface and reflect the image beam through the third surface, so that the image beam exits from the second surface; The SAM projection lens is opposite to the second surface of the right-angle prism, and the angle between the optical axis of the SAM projection lens and the first direction is 1° to 2°, and the optical axis of the SAM projection lens is perpendicular to the second direction. The total length of the SAM projection lens is 52mm to 54mm, and the effective focal length of the SAM projection lens is 9mm to 10mm. The SAM projection lens is configured to receive the image beam and project the image beam onto the target projection surface.

2. The intelligent projection lamp according to claim 1, wherein, The light source module includes a first light source, a second light source, a third light source, a first filter, and a second filter, wherein... The first light source is configured to emit a first wavelength beam in the opposite direction to the second direction; The first filter and the second filter are sequentially disposed in the optical path of the first wavelength beam in the opposite direction to the second direction. The first filter is configured to transmit the first wavelength beam, and the second filter is configured to reflect the first wavelength beam in the first direction. The second light source is disposed opposite to the first filter. The second light source is configured to emit a second wavelength light beam along a first direction. The first filter is configured to reflect the second wavelength light beam in the opposite direction of the second direction. The second filter is configured to reflect the second wavelength light beam in the first direction. The third light source is disposed opposite to the second filter, the third light source is configured to emit a third wavelength light beam along a first direction, and the second filter is configured to transmit the third wavelength light beam; The first wavelength beam, the second wavelength beam, and the third wavelength beam are combined at the second filter to form the illumination beam that propagates along the first direction.

3. The intelligent projection lamp according to claim 2, wherein, The first wavelength beam is a blue light beam, the second wavelength beam is a green light beam, and the third wavelength beam is a red light beam.

4. The intelligent projection lamp according to claim 2, wherein, The first light source, the second light source, and the third light source are each equipped with a collimating lens assembly, and the combined focal length of the collimating lens assembly is 7.1 mm to 7.5 mm.

5. The intelligent projection lamp according to claim 4, wherein, The collimating lens assembly includes: A first collimating lens, which is a spherical lens, has a refractive index of 1.81 to 1.85, a dispersion coefficient greater than 40, and a focal length of 7.1 mm to 7.4 mm; and The second collimating lens is an aspherical lens with a refractive index of 1.5 to 1.7, a dispersion coefficient greater than 50, and a focal length of 10.9 mm to 11.2 mm. The first collimating lens and the second collimating lens are arranged sequentially in the first direction, or the first collimating lens and the second collimating lens are arranged sequentially in the opposite direction to the second direction.

6. The intelligent projection lamp according to claim 1, wherein, The relay lens assembly includes a first relay lens, a reflecting mirror, and a second relay lens arranged sequentially along the propagation path of the sub-beam, wherein... The first relay lens is configured to converge the multiple sub-beams; The reflector is configured to reflect the multi-beam sub-beam; The second relay lens is configured to converge the multiple sub-beams, so that the multiple sub-beams are incident on the third surface at a preset angle; The combined focal length of the first relay lens and the second relay lens is 25mm to 35mm, and it has positive optical power.

7. The intelligent projection lamp according to claim 6, wherein, The first relay lens is a spherical lens with an angle of 6° to 7° with the second direction, a refractive index of 1.8 to 2.0, a dispersion coefficient of less than 30, and a focal length of 45 to 55 mm. The angle between the reflector and the second direction is 45°; The second relay lens is a spherical lens with an angle of -68° to -69° with the second direction, a refractive index of 1.6 to 1.7, a dispersion coefficient of less than 35, and a focal length of 30 to 40 mm.

8. The intelligent projection lamp according to claim 1, wherein, The SAM projection lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged sequentially in a first direction.

9. The intelligent projection lamp according to claim 8, wherein, The SAM projection lens has an aperture number of 2.1 to 2.3, a horizontal field of view of 39.7° to 40.3°, and a vertical field of view of 19.7° to 20.3°.

10. The intelligent projection lamp according to claim 1, wherein, The intelligent projection lamp also includes a freeform mirror, which is disposed between the compound eye lens and the relay lens group. The freeform mirror is configured to modulate the multi-beam sub-beams so that the multi-beam sub-beams form light spots with differentiated brightness distribution on the digital micromirror device, thereby ensuring uniform brightness of the projected image.

11. The intelligent projection lamp according to any one of claims 1-10, wherein, The smart projection lamp also includes a bottom shell and a top cover, the bottom shell and the top cover defining a mounting cavity; The bottom shell includes a main body and a protrusion. The projection of the main body onto a first plane is approximately rectangular. The protrusion is disposed on the central axis of the main body. The first plane is parallel to the first direction and the second direction. The light source module, the compound eye lens, the relay lens group, the right-angle prism, and the digital micromirror device are installed inside the bottom shell, and the SAM projection lens is installed inside the protrusion.

12. The intelligent projection lamp according to claim 11, wherein, The smart projection lamp also includes a first heat sink and a second heat sink. The main body includes a bottom wall and a side wall. The side wall is disposed on one side of the bottom wall. The bottom wall and the side wall together form a first mounting groove. A second mounting groove is formed on the outer side of the side wall. The second mounting groove communicates with the first mounting groove. The light source module, the compound eye lens, the relay lens group, and the right-angle prism are disposed in the first mounting slot; The digital micromirror device is disposed in the second mounting slot; The upper cover covers the first mounting groove and forms a corresponding first mounting cavity; The first heat sink is disposed on the outside of the main body and abuts against the digital micromirror device. The first heat sink and the upper cover cover the second mounting groove and form a corresponding second mounting cavity. The second heat sink is connected to the side of the main body away from the protrusion.

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