Light source module and light projection equipment

Abstract

The utility model relates to a light source module and light projection equipment, the light source module comprises a light source, a transmission part and a driving device, the light source is used for emitting a light beam, and the transmission part is arranged on a light path of the light beam. The driving device is in transmission connection with at least one of the light source and the transmission part and is used for enabling the light source and the transmission part to rotate relatively, and the rotation axis of the light source and the transmission part does not coincide with the light path of the light beam when the light source and the transmission part rotate relatively. The transmission piece comprises a transmission surface deviating from the light source, and the inclined included angle between at least part of the transmission surface and the rotating axis is gradually increased or decreased in the circumferential direction around the rotating axis; and when the transmission piece and the light source rotate relatively, the light beam is transmitted through different parts of the transmission surface, so that the deflection angle of the light beam is changed. The light source module can realize light beam offset by adopting a simple driving structure.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and in particular to a light source module and a projection device. Background Technology

[0002] In the development of modern optical technology and instruments, devices capable of refracting light beams play a crucial role. These devices are widely used in various fields such as scientific research experiments, medical diagnosis, communication transmission, military reconnaissance, and entertainment displays, and have also promoted in-depth research into optical theory and the miniaturization and integration of optical devices.

[0003] Traditionally, beam refraction relies mainly on optical elements such as reflecting or transmitting plane mirrors and prisms. Typically, optical elements such as plane mirrors and prisms are positioned relative to the light source by calculation. If multiple refractions are required, multiple optical elements need to be used and arranged in different positions, resulting in a complex structure, large size, and a single effect on the refraction of the beam. Utility Model Content

[0004] This application provides a light source module and a projection device.

[0005] In a first aspect, this application provides a light source module, comprising a light source, a transmissive element, and a driving device. The light source emits a light beam, and the transmissive element is disposed in the optical path of the light beam. The driving device is drively connected to at least one of the light source and the transmissive element, and is used to cause the light source and the transmissive element to rotate relative to each other. When the light source and the transmissive element rotate relative to each other, their rotation axes do not coincide with the optical path of the light beam. The transmissive element includes a transmissive surface facing away from the light source, and the angle of inclination between at least a portion of the transmissive surface and the rotation axis increases or decreases circumferentially about the rotation axis. When the transmissive element and the light source rotate relative to each other, the light beam is transmitted through different parts of the transmissive surface, thereby changing the deflection angle of the light beam.

[0006] In some alternative examples, the transmissive element includes multiple transmissive surfaces connected sequentially along the circumference of the transmissive element. The multiple transmissive surfaces include a first transmissive surface and a second transmissive surface arranged circumferentially at the head and tail. The tilt angle of the first transmissive surface is smaller than the tilt angle of the second transmissive surface. In the direction from the first transmissive surface to the second transmissive surface, the tilt angle of the multiple transmissive surfaces changes continuously and increases.

[0007] In some alternative examples, multiple transmission surfaces are sequentially connected circumferentially between the first and second transmission surfaces, with a distance between the first and second transmission surfaces.

[0008] In some optional examples, multiple transmission surfaces are sequentially connected end to end along the circumference, the transmission element is divided into a first transmission interval and a second transmission interval, and multiple transmission surfaces are distributed in the first transmission interval and the second transmission interval. The multiple transmission surfaces in the first transmission interval and the multiple transmission surfaces in the second transmission interval are symmetrically arranged about a specified plane passing through the rotation axis.

[0009] In some alternative examples, the plurality of transmission surfaces within the first transmission interval include a first end transmission surface and a second end transmission surface, which are located at opposite ends of the first transmission interval, respectively; and the angle of inclination of the plurality of transmission surfaces increases in the direction from the first end transmission surface to the second end transmission surface.

[0010] In some alternative examples, the multiple transmission surfaces within the second transmission interval include a third end transmission surface and a fourth end transmission surface, which are located at opposite ends of the second transmission interval, respectively; the third end transmission surface and the first end transmission surface are symmetrically arranged and connected to each other, and the fourth end transmission surface and the second end transmission surface are symmetrically arranged and connected to each other.

[0011] In some alternative examples, at least one of the multiple transmission surfaces is a curved surface, or at least one of the multiple transmission surfaces is a plane, or all of the multiple transmission surfaces are curved surfaces, or all of the multiple transmission surfaces are planes.

[0012] In some optional examples, there is an average included angle between each transmission surface as a whole and the axis of rotation, and at least two of the multiple transmission surfaces have different average included angles.

[0013] In some alternative examples, the transmissive surface is a recessed surface on the transmissive element that faces away from the light source; or, the transmissive surface is a protruding surface on the transmissive element that faces away from the light source.

[0014] Secondly, this application also provides a light projection device, including a device body and the aforementioned light source module, wherein the light source is used to emit a light beam and the light source module is disposed on the device body.

[0015] Compared to existing technologies, the light source module provided in this application, when in use, has a transmissive element located on one side of the light source, with its transmissive surface positioned in the optical path of the light beam emitted by the light source to transmit the beam. A driving device drives the transmissive element and the light source to rotate relative to each other, and the tilt angle of the transmissive surface illuminated by the light beam changes with the relative rotation of the transmissive element and the light source. In the embodiments of this application, at least a portion of the tilt angle between the transmissive surface and the rotation axis increases or decreases circumferentially around the rotation axis. The tilt angle of the transmissive surface through which the light beam passes changes with the relative rotation of the transmissive element and the light source, and the beam deflection angle changes when transmitted through transmissive surfaces with different tilt angles. The light source module provided in the embodiments of this application achieves beam deflection using a simple driving structure, and the overall device size is small, exhibiting high stability. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a light-projection device provided in one embodiment of this application.

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of the transmission component of the light source module of the projection device shown.

[0019] Figure 3 yes Figure 1 A simplified optical path diagram of the light source module shown.

[0020] Figure 4 yes Figure 2 The diagram shown illustrates the structure of the first and second transmission surfaces of the transmission element.

[0021] Figure 5 yes Figure 2 A schematic diagram of another embodiment of the transmission element shown.

[0022] Figure 6 yes Figure 2 A schematic diagram of another embodiment of the transmission element shown.

[0023] Figure 7 yes Figure 2 A schematic diagram of another embodiment of the transmission element shown.

[0024] Figure 8 yes Figure 1 A schematic diagram of another embodiment of the light source module shown.

[0025] Figure 9 yes Figure 8 A schematic diagram of the structure of the transmission component of the light source module shown.

[0026] Figure 10 yes Figure 8 A schematic diagram of another embodiment of the transmission element shown.

[0027] Figure 11 yes Figure 8 A schematic diagram of another embodiment of the transmission element shown.

[0028] Figure 12 yes Figure 8A schematic diagram of another embodiment of the transmission element shown.

[0029] Labeling Explanation: 100, Light Source Module; 10, Drive Device; 12, Rotating Shaft; 30, Transmitting Component; 301, First Transmitting Section; 3012, First End Transmitting Surface; 3014, Second End Transmitting Surface; 303, Second Transmitting Section; 3032, Third End Transmitting Surface; 3034, Fourth End Transmitting Surface; 32, Center Section; 34, Transmitting Surface; 341, First Transmitting Surface; 343, Second Transmitting Surface; 36, Carrier Section; 38, Support Section; 200, Light Source. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0031] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. The specification and claims do not distinguish components based on differences in name, but rather on differences in function. For example, the term "comprising" used throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; "generally" means that those skilled in the art can solve the technical problem and basically achieve the technical effect within a certain margin of error.

[0032] Please see Figure 1 This application provides a light source module 100, which can be applied to a projection device 300, which can be a projection lamp or a lighting lamp. The projection device 300 may include the aforementioned light source module 100 and a device body (not shown in the figure). This specification does not limit the specific structure of the projection device 300. For example, the device body may be an outer shell for mounting the light source module 100, or a support frame for supporting the light source module 100. In some embodiments, the projection device 300 may also include a patterned sheet, which may be disposed at the light outlet of the projection device 300. The patterned sheet may be a diffraction sheet, film, etc., which can be used to form a decorative light pattern from the emitted light of the projection device 300.

[0033] Please also refer to Figure 1 and Figure 2In this embodiment, the light source module 100 may include a light source 200, a driving device 10, and a transmitting element 30. The light source 200 emits a light beam P, and the transmitting element 30 is disposed in the optical path of the light beam P. The driving device 10 is kinetically connected to at least one of the light source 200 and the transmitting element 30, and is used to cause the light source 200 and the transmitting element 30 to rotate relative to each other. When the light source 200 and the transmitting element 30 rotate relative to each other, the rotation axis A and the optical path of the light beam P do not coincide. The transmitting element 30 may include a transmission surface 34 facing away from the light source 200, and the tilt angle between at least a portion of the transmission surface 34 and the rotation axis A increases or decreases circumferentially about the rotation axis A. When the transmitting element 30 and the light source 200 rotate relative to each other, the light beam P is transmitted through different transmission surfaces 34, thereby changing the deflection angle of the light beam P.

[0034] When the light source module 100 is in use, the transmissive element 30 is located on one side of the light source 200, and the transmissive surface 34 of the transmissive element 30 is located in the optical path of the light beam P emitted by the light source 200 to transmit the light beam P. The driving device 10 drives the transmissive element 30 and the light source 200 to rotate relative to each other, and the tilt angle of the transmissive surface 34 illuminated by the light beam P changes with the relative rotation of the transmissive element 30 and the light source 200. In this embodiment, at least a portion of the tilt angle between the transmissive surface 34 and the rotation axis A increases or decreases circumferentially around the rotation axis A. The tilt angle of the transmissive surface 34 through which the light beam P passes changes with the relative rotation of the transmissive element 30 and the light source 200, and the deflection angle of the light beam P changes when it is transmitted through the transmissive surface 34 with different tilt angles. The light source module 100 provided in this embodiment can achieve the deflection of the light beam P with a simple driving structure, and the overall size of the device is small and has high stability.

[0035] This specification does not limit the specific type of the light source 200. The light source 200 can be used to emit a beam P with a small beam angle. For example, the light source 200 can be a laser light source or a collimated LED light source. The beam P emitted by the light source 200 can be a laser beam, a collimated LED beam, or a diffracted laser beam (e.g., a light spot or light point). The beam P can also be a beam with pattern information.

[0036] This specification does not limit whether the driving device 10 is driven to the light source 200 or the transmitting element 30. For example, the driving device 10 can be driven to the light source 200, and the driving device 10 can drive the light source 200 to rotate relative to the transmitting element 30 about the rotation axis A. Alternatively, the driving device 10 can be driven to the transmitting element 30, the light source 200 remains stationary, and the driving device 10 drives the transmitting element 30 to rotate relative to the light source 200 about the rotation axis A. In other embodiments, the driving device 10 can be driven to both the transmitting element 30 and the light source 200. The driving device 10 drives the transmitting element 30 and the light source 200 respectively through two sets of transmission structures, so that the rotation speeds of the transmitting element 30 and the light source 200 are different, thereby achieving the phenomenon of relative rotation between the light source 200 and the transmitting element 30. In this embodiment, the driving device 10 is driven to the transmitting element 30, and the light source 200 can be fixedly connected to the device body.

[0037] The transmitting element 30 is drivenly connected to the rotating shaft 12 of the driving device 10, and the axis of the rotating shaft 12 is the rotation axis A. The transmitting element 30 may include a central portion 32 and multiple transmitting surfaces 34 for transmitting light beams. This specification does not limit the specific connection position between the transmitting element 30 and the rotating shaft 12. The rotating shaft 12 may be connected to the central portion 32 of the transmitting element 30, making the transmitting element 30 and the rotating shaft 12 coaxial, or the rotating shaft 12 may be connected to other positions of the transmitting element 30, causing the transmitting element 30 to rotate eccentrically.

[0038] In this embodiment, the rotating shaft 12 is connected to the central portion 32, and the rotation axis A passes through the central portion 32. The central portion 32 has a circumferential direction B around the axis, and a plurality of transmission surfaces 34 are arranged along the circumferential direction B on the outer periphery of the central portion 32. Each transmission surface 34 may include a connecting end 3401 and an extension end 3403. The connecting end 3401 is connected to the central portion 32, and the extension end 3403 is located at the end of the transmission surface 34 away from the central portion 32. The geometric center line connecting the connecting end 3401 and the extension end 3403 of each transmission surface 34 defines a virtual line segment L. The virtual line segment L of each transmission surface 34 forms an inclined angle b with the rotation axis A, and at least two of the plurality of transmission surfaces 34 have different inclined angles b. The driving device 10 is used to drive the transmission element 30 to rotate so that the light beam P is transmitted through different transmission surfaces 34, thereby changing the deflection angle of the light beam P.

[0039] In use, the transmissive element 30 is located on one side of the light source 200, and the transmissive surface 34 of the transmissive element 30 is located in the optical path of the light beam P emitted by the light source 200 to transmit the light beam P. The rotation drive 10 drives the transmissive element 30 to rotate relative to the light source 200, and the transmissive surface 34 from which the light beam P exits changes with the rotation of the transmissive element 30. In this embodiment, at least two of the multiple transmissive surfaces 34 have different tilt angles b. As the multiple transmissive surfaces 34 change positions with the rotation of the transmissive element 30, the deflection angle of the light beam P changes when it is transmitted through the transmissive surfaces 34 with different tilt angles b. The light source module 100 provided in this embodiment can achieve the deflection of the light beam P with a simple drive structure, and the overall size of the device is small and has high stability.

[0040] The connecting end 3401 and the extending end 3403 of each transmission surface 34 are opposite ends of each transmission surface 34 in the radial direction of the transmission element 30. The connecting end 3401 and the extending end 3403 can be understood as the outlines of the two ends of the transmission surface 34. Figure 2 As shown, the virtual line segment L is the line connecting the geometric center of the connecting end 3401 and the geometric center of the extension end 3403. The tilt angle b between the virtual line segment L and the rotation axis A can characterize the degree of tilt of the transmission surface 34 relative to the rotation axis A.

[0041] In this embodiment, the drive device 10 is used to drive the transmission element 30 to rotate. This specification does not limit the specific structure of the drive device 10. For example, the drive device 10 may include any one of the following drive sources: a rotary motor, a rotary cylinder, etc. Alternatively, the drive device 10 may also include a transmission structure, such as a lead screw, a lead screw nut, or a gear set. In this embodiment, the drive device 10 is a rotary motor, and the drive device 10 has a rotating shaft 12, through which the drive device 10 outputs rotational torque.

[0042] The central portion 32 of the transmissive element 30 is anti-rotatingly connected to the rotating shaft 12 of the drive device 10, and the transmissive surface 34 of the transmissive element 30 is used to transmit the light beam P emitted from the light source 200. It should be understood that the "anti-rotation connection" between the transmissive element 30 and the rotating shaft 12 should be understood as the transmissive element 30 being relatively fixed to the rotating shaft 12, and the transmissive element 30 being able to rotate with the rotation of the rotating shaft 12.

[0043] In this embodiment, the light source 200 is disposed on the side of the transmissive element 30 away from the transmissive surface 34, and the direction of the light beam P is in the same direction as the rotation axis A. This specification does not limit the specific structure of the transmissive element 30; for example, the transmissive element 30 may include a transmissive mirror, or it may include a prism, grating, or other structures. In this embodiment, the transmissive element 30 is a lens, which is an optical element made of a transparent material (e.g., glass, crystal, or resin). As an example, the transmissive element 30 may also include a light-transmitting carrier portion 36, which is connected to the outer periphery of the central portion 32 along the circumferential direction B. The transmissive surface 34 is the surface of the light-transmitting carrier portion 36 facing away from the light source 200. Multiple transmissive surfaces 34 are provided, covering the entire surface of the light-transmitting carrier portion 36 facing away from the light source 200. The transmissive element 30 can be a convex lens or a concave lens. In this embodiment, the transmissive element 30 is a plano-convex lens or a plano-concave lens, and the surface of the light-transmitting carrier portion 36 facing away from the transmissive surface 34 is a plane. This specification does not limit the specific shape of the transmission surface 34. The transmission surface 34 can be a curved surface, a plane, or a sphere. In this embodiment, at least one of the multiple transmission surfaces 34 is a curved surface; or, at least one of the multiple transmission surfaces 34 is a plane.

[0044] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," and "fixing," etc., 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; they can refer to the internal communication of two components or merely surface contact. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] In this embodiment, multiple transmissive surfaces 34 are sequentially connected along the circumferential direction B, covering the entire surface of the light-transmitting carrier portion 36 facing away from the light source 200. The multiple transmissive surfaces 34 may include a first transmissive surface 341 and a second transmissive surface 343 arranged along the circumferential direction B at the head and tail. The arrangement of the first transmissive surface 341 and the second transmissive surface 343 along the circumferential direction B at the head and tail can be understood as follows: along the circumferential direction B, all other transmissive surfaces 34 besides the first transmissive surface 341 and the second transmissive surface 343 are located between the first transmissive surface 341 and the second transmissive surface 343. The tilt angle b of the first transmissive surface 341 is smaller than the tilt angle b of the second transmissive surface 343, and the tilt angle b of the multiple transmissive surfaces 34 continuously changes and increases in the direction from the first transmissive surface 341 to the second transmissive surface 343.

[0046] In this application, 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, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] The fact that the tilt angle b of the first transmission surface 341 is smaller than the tilt angle b of the second transmission surface 343 can be understood as follows: the first transmission surface 341 is closer to the rotation axis A than the second transmission surface 343, and the tilt arc of the first transmission surface 341 relative to the rotation axis A is larger. Here, the positional relationship of "closer" is based on the orientation or positional relationship shown in the accompanying drawings, and is only a simplified description for the convenience of describing this application, and does 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 this application. The aforementioned "direction from the first transmission surface 341 to the second transmission surface 343" is understood as the direction that sequentially passes through the first transmission surface 341, the multiple transmission surfaces 34 between them, and the second transmission surface 343. As an example, such as... Figure 2 As shown, the direction from the first transmission surface 341 to the second transmission surface 343 is counterclockwise. In the counterclockwise direction, the included angle b of the inclination of the multiple transmission surfaces 34 changes continuously and increases.

[0048] The light beam P emitted from the light source 200 exits from the transmission surface 34, and the driving device 10 drives the transmission element 30 to rotate. In the counter-clockwise direction, the tilt angle b of the multiple transmission surfaces 34 increases progressively. If the driving device 10 drives the transmission element 30 to rotate counter-clockwise, the light beam P is successively transmitted through the transmission surfaces 34 with continuously changing tilt angles b. During the rotation of the transmission element 30, the emitted light P1 formed by the transmission is deflected from the inside out (e.g., ...). Figure 3 (As shown). Here, "the emitted light P1 shifts from the inside out" means that the emitted light P shifts from a position relatively close to the light source 200 to gradually moving away from the light source 200. If the driving device 10 drives the transmission element 30 to rotate clockwise, the emitted light P1 shifts from the outside in. Here, "the emitted light P1 shifts from the outside in" means that the emitted light P shifts from a position relatively far from the light source 200 to gradually moving closer to the light source 200. The transmission surface 34 from which the beam P is emitted changes continuously with the rotation of the transmission element 30, and the deflection angle of the emitted light P1 changes with the change in the average angle of the transmission surface 34, thereby achieving the effect of continuous outward or inward shift of the emitted light P1 until the transmission element 30 rotates one cycle and returns to the starting point, at which point the emitted light P1 also returns to the starting point, and a new shift cycle begins.

[0049] The drive device 10 rotates the transmission element 30 to achieve unidirectional cyclic deflection of the light beam. This method is simple to operate, highly stable, and the light source module 100 has a simple structure and a small overall size. The light source module 100 uses the transmission element 30 to achieve beam deflection, which, compared to using a transmission method, avoids color difference caused by the different refractive indices of the same material at different wavelengths, thus maintaining a good light mixing effect.

[0050] In this embodiment, the transmission surface 34 can be either curved or planar. As an example, multiple transmission surfaces 34 are all curved, and the virtual line segment L of each transmission surface 34 coincides with the transmission surface 34. The multiple transmission surfaces 34 between the first transmission surface 341 and the second transmission surface 343 are smoothly connected along the circumferential direction B. The aforementioned "connection" can be understood as the surfaces of the multiple transmission surfaces 34 smoothly transitioning to each other at adjacent points, such as the connection gap being less than a specified value, or both being located on the same plane, or both defining continuous curved surfaces; or it can be understood as the multiple transmission surfaces 34 jointly forming a specific appearance contour, such as jointly forming a curved surface structure. In this embodiment, the multiple transmission surfaces 34 jointly form a curved surface structure, and there is no obvious dividing line between two adjacent transmission surfaces 34. The central portion 32 of the transmission element 30 can be recessed or protruding relative to its circumferential transmission surface 34. There is a distance between the first transmission surface 341 and the second transmission surface 343, and the transmission element 30 may also include a support portion 38. The first transmission surface 341 and the second transmission surface 343 can be connected by a support 38. The plane where the support 38 is located intersects with both the first transmission surface 341 and the second transmission surface 343. The light beam P emitted by the light source 200 is parallel to the plane where the support 38 is located.

[0051] This manual does not limit the specific structure of each transmission surface 34; please refer to the following references as well. Figure 1 and Figure 4The tangent plane at any point in each transmission surface 34 forms an angle with the rotation axis A. An average angle exists between the transmission surface 34 as a whole and the rotation axis A. At least two of the transmission surfaces 34 have different average angles. Regarding the tangent plane at any point in the transmission surface 34, if the transmission surface 34 is curved, the tangent plane at any point in the transmission surface 34 is understood as a plane passing through that point and tangent to the transmission surface 34 at that point; if the transmission surface 34 is planar, the tangent plane at any point in the transmission surface 34 is the transmission surface 34 itself. A specified curve C is defined on the overall surface formed by all the transmission surfaces 34, revolving around the rotation axis A. The specified curve C passes through each transmission surface 34, and the distance between each point on the specified curve C and the center part 32 is equal. The average angle between each transmission surface 34 as a whole and the rotation axis A can be understood as: the average angle between the tangent plane at each point on the specified curve C within each transmission surface 34 and the rotation axis A. In the direction from the first transmission surface 341 to the second transmission surface 343, the angle between the tangent plane at any point in each transmission surface 34 and the rotation axis A increases progressively.

[0052] This specification does not limit the specific shape of the transmission element 30. For example, the transmission element 30 can be a plano-convex lens or a plano-concave lens. As an example, such as Figure 1 As shown, the transmission surface 34 is a recessed surface on the transmission element 30 facing away from the light source 200. The central portion 32 and multiple transmission surfaces 34 constitute the end face of the transmission element 30. The end face of the transmission element 30 is recessed in the central portion 32, making the transmission element 30 generally dome-shaped. The transmission surfaces 34 are located on the inner surface of the transmission element 30, and the light beam P exits from the inner surface of the transmission element 30. As another example, such as Figure 5 As shown, the transmission surface 34 is a protruding surface on the transmission element 30 that faces away from the light source 200. The end face of the transmission element 30 protrudes from the center portion 32, and the transmission surface 34 is located on the outer surface of the transmission element 30. The light beam P exits from the outer surface of the transmission element 30.

[0053] In another embodiment, please refer to Figure 6 Multiple transmission surfaces 34 are planar, and the virtual line segment L of each transmission surface 34 coincides with that surface. Each transmission surface 34 is approximately fan-shaped, and the planes containing the multiple transmission surfaces 34 intersect, with a clear boundary line between adjacent transmission surfaces 34. The angle between the tangent plane at any point in each transmission surface 34 and the rotation axis A is equal. In the direction from the first transmission surface 341 to the second transmission surface 343, the angles formed between the multiple transmission surfaces 34 and the rotation axis A increase progressively. When the transmission surface 34 is planar, the emitted light P1 will exhibit a jump deflection as the transmission element 30 rotates.

[0054] In this embodiment, the transmission element 30 can be a plano-convex lens or a plano-concave lens. As an example, for instance... Figure 6 As shown, the transmissive surface 34 is a recessed surface on the transmissive element 30 that faces away from the light source 200. The central portion 32 and multiple transmissive surfaces 34 constitute the end face of the transmissive element 30, and the end face of the transmissive element 30 is recessed in the central portion 32; as another example, such as Figure 7 As shown, the transmission surface 34 is a protruding surface on the transmission element 30 that faces away from the light source 200. The end face of the transmission element 30 protrudes from the center portion 32.

[0055] Please also refer to Figure 8 and Figure 9 In other embodiments, multiple transmission surfaces 34 enable the reciprocating offset motion of the emitted light P1, and the multiple transmission surfaces 34 are sequentially adjacent and connected along the circumferential direction B. The transmission element 30 is divided into a first transmission interval 301 and a second transmission interval 303, and the multiple transmission surfaces 34 are distributed in the first transmission interval 301 and the second transmission interval 303. The multiple transmission surfaces 34 in the first transmission interval 301 and the multiple transmission surfaces 34 in the second transmission interval 303 are symmetrically arranged about a designated plane M passing through the rotation axis A.

[0056] The plurality of transmission surfaces 34 within the first transmission interval 301 may include a first end transmission surface 3012 and a second end transmission surface 3014, which are located at opposite ends of the first transmission interval 301. The tilt angle b of the first end transmission surface 3012 is smaller than the tilt angle b of the second end transmission surface 3014, and the tilt angle b of the plurality of transmission surfaces 34 increases in the direction from the first end transmission surface 3012 to the second end transmission surface 3014.

[0057] The fact that the tilt angle b of the first end transmission surface 3012 is smaller than the tilt angle b of the second end transmission surface 3014 can be understood as follows: the first end transmission surface 3012 is closer to the rotation axis A than the second end transmission surface 3014, and the tilt arc of the first end transmission surface 3012 relative to the rotation axis A is larger. The aforementioned "direction from the first end transmission surface 3012 to the second end transmission surface 3014" can be understood as the direction that sequentially passes through the first end transmission surface 3012, the multiple transmission surfaces 34 between them, and the second end transmission surface 3014. As an example, for instance... Figure 9 As shown, the direction from the first end transmission surface 3012 to the second end transmission surface 3014 is counterclockwise.

[0058] The multiple transmission surfaces 34 within the second transmission interval 303 and the multiple transmission surfaces 34 in the first transmission interval 301 are symmetrically arranged about a plane passing through the rotation axis A. The multiple transmission surfaces 34 within the second transmission interval 303 may include a third-end transmission surface 3032 and a fourth-end transmission surface 3034, which are located at opposite ends of the second transmission interval 303. The tilt angle b of the third-end transmission surface 3032 is smaller than the tilt angle b of the fourth-end transmission surface 3034. In the direction from the third-end transmission surface 3032 to the fourth-end transmission surface 3034, the tilt angle b of the multiple transmission surfaces 34 increases progressively.

[0059] The fact that the tilt angle b of the third end transmission surface 3032 is less than the tilt angle b of the fourth end transmission surface 3034 can be understood as follows: the third end transmission surface 3032 is closer to the rotation axis A than the fourth end transmission surface 3034, and the tilt arc of the third end transmission surface 3032 relative to the rotation axis A is larger. The aforementioned "direction from the third end transmission surface 3032 to the fourth end transmission surface 3034" is understood as the direction that sequentially passes through the third end transmission surface 3032, the multiple transmission surfaces 34 between them, and the fourth end transmission surface 3034. In this embodiment, as... Figure 9 As shown, the third end transmission surface 3032 is symmetrically arranged with the first end transmission surface 3012 and connected to each other, and the fourth end transmission surface 3034 and the second end transmission surface 3014 are symmetrically arranged with each other and connected to each other. Therefore, the direction from the third end transmission surface 3032 to the fourth end transmission surface 3034 is clockwise.

[0060] A light beam P emitted from light source 200 exits from transmission surface 34, and driving device 10 drives transmission element 30 to rotate. As an example, the initial light beam P exits from the third end transmission surface 3032. If driving device 10 drives transmission element 30 to rotate counterclockwise, the light beam P is successively transmitted through transmission surfaces 34 within the second transmission interval 303, with the average angle increasing, and the emitted light P1 is deflected from the outside to the inside. When transmission element 30 rotates into the first transmission interval 301, the light beam P exits from transmission surfaces 34 with the average angle decreasing along the direction from the second end transmission surface 3014 to the first end transmission surface 3012, and the emitted light P1 is deflected from the inside to the outside. A full counterclockwise rotation of transmission element 30 achieves a reciprocating deflection motion of emitted light P1 from the outside to the inside and then from the inside to the outside. Similarly, a full clockwise rotation of transmission element 30 achieves a reciprocating deflection motion of emitted light P1 from the inside to the outside and then from the outside to the inside.

[0061] In this embodiment, the multiple transmission surfaces 34 can all be curved surfaces, and the virtual line segment L of each transmission surface 34 overlaps with that transmission surface 34. For example... Figure 9As shown, multiple transmission surfaces 34 are smoothly connected along the circumferential direction B. The first end transmission surface 3012 and the third end transmission surface 3032 are smoothly connected, as are the second end transmission surface 3014 and the fourth end transmission surface 3034. In the direction from the first end transmission surface 3012 to the second end transmission surface 3014, the angle between the tangent plane at any point on the first end transmission surface 3012 and the rotation axis A increases progressively. Similarly, in the direction from the third end transmission surface 3032 to the fourth end transmission surface 3034, the angle between the tangent plane at any point on the third end transmission surface 3032 and the rotation axis A increases progressively.

[0062] In this embodiment, the transmission element 30 can be a plano-convex lens or a plano-concave lens. As an example, for instance... Figure 9 As shown, the central portion and multiple transmissive surfaces 34 constitute the end face of the transmissive element 30, and the end face of the transmissive element 30 is recessed in the central portion 32; as another example, such as Figure 10 As shown, the end face of the transmission element 30 protrudes from the center portion 32.

[0063] Please see Figure 11 As another example, multiple transmission surfaces 34 are all planar, and the virtual line segment L of each transmission surface 34 coincides with that transmission surface 34. Each transmission surface 34 is approximately fan-shaped, and the planes containing the multiple transmission surfaces 34 intersect, with a clear boundary line between adjacent transmission surfaces 34. The angle between the tangent plane at any point in each transmission surface 34 and the rotation axis A is equal, and the angles formed between the multiple transmission surfaces 34 and the rotation axis A increase sequentially in the direction from the first end transmission surface 3012 to the second end transmission surface 3014. When the transmission surface 34 is planar, the emitted light P1 will exhibit a jump deflection as the transmission element 30 rotates.

[0064] In this embodiment, the transmission element 30 can be a plano-convex lens or a plano-concave lens. As an example, for instance... Figure 11 As shown, the central portion and multiple transmissive surfaces 34 constitute the end face of the transmissive element 30, and the end face of the transmissive element 30 is recessed in the central portion 32; as another example, such as Figure 12 As shown, the end face of the transmission element 30 protrudes from the center portion 32.

[0065] In use, the light source module 100 provided in this embodiment has a transmitting element 30 located on one side of the light source 200, and its transmitting surface 34 positioned in the optical path of the light beam P emitted from the light source 200 for transmitting the light beam P. The driving device 10 drives the transmitting element 30 to rotate relative to the light source 200, and the transmitting surface 34 from which the light beam P exits changes with the rotation of the transmitting element 30. In this embodiment, at least two of the multiple transmitting surfaces 34 have different tilt angles b. As the multiple transmitting surfaces 34 change position with the rotation of the transmitting element 30, the deflection angle of the light beam P changes when transmitted through the transmitting surfaces 34 with different tilt angles b. The light source module 100 provided in this embodiment achieves the deflection of the light beam P using a simple driving structure, and the overall size of the device is small with high stability.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A light source module, characterized in that, include: A light source, used to emit light beams; A transmission element is disposed in the optical path of the light beam; And a driving device, which is connected to at least one of the light source and the transmissive element, and is used to cause the light source and the transmissive element to rotate relative to each other, wherein the axis of rotation of the light source and the transmissive element when they rotate relative to each other does not coincide with the optical path of the light beam; The transmissive element includes a transmissive surface facing away from the light source, and the angle of inclination between at least a portion of the transmissive surface and the rotation axis increases or decreases circumferentially about the rotation axis; when the transmissive element and the light source rotate relative to each other, the light beam is transmitted through different parts of the transmissive surface, thereby changing the deflection angle of the light beam.

2. The light source module as described in claim 1, characterized in that, The transmissive element includes a plurality of transmissive surfaces, which are sequentially connected along the circumference of the transmissive element. The plurality of transmissive surfaces include a first transmissive surface and a second transmissive surface arranged along the circumference at the head and tail. The tilt angle of the first transmissive surface is smaller than the tilt angle of the second transmissive surface. In the direction from the first transmissive surface to the second transmissive surface, the tilt angle of the plurality of transmissive surfaces changes continuously and increases.

3. The light source module as described in claim 2, characterized in that, A plurality of the transmission surfaces between the first transmission surface and the second transmission surface are sequentially connected along the circumferential direction, and there is a distance between the first transmission surface and the second transmission surface.

4. The light source module as described in claim 1, characterized in that, Multiple transmission surfaces are sequentially connected end-to-end along the circumferential direction. The transmission element is divided into a first transmission interval and a second transmission interval. Multiple transmission surfaces are distributed in the first transmission interval and the second transmission interval. Multiple transmission surfaces in the first transmission interval and multiple transmission surfaces in the second transmission interval are symmetrically arranged about a designated plane passing through the rotation axis.

5. The light source module as described in claim 4, characterized in that, The plurality of transmission surfaces within the first transmission interval include a first end transmission surface and a second end transmission surface, the first end transmission surface and the second end transmission surface being located at opposite ends of the first transmission interval; the included angle of inclination of the plurality of transmission surfaces increases in the direction from the first end transmission surface to the second end transmission surface.

6. The light source module as described in claim 5, characterized in that, The multiple transmission surfaces within the second transmission interval include a third end transmission surface and a fourth end transmission surface, which are located at opposite ends of the second transmission interval. The third end transmission surface and the first end transmission surface are symmetrically arranged and connected to each other, and the fourth end transmission surface and the second end transmission surface are symmetrically arranged and connected to each other.

7. The light source module as described in any one of claims 1 to 6, characterized in that, At least one of the plurality of transmission surfaces is a curved surface, or at least one of the plurality of transmission surfaces is a plane, or all of the plurality of transmission surfaces are curved surfaces, or all of the plurality of transmission surfaces are planes.

8. The light source module as described in any one of claims 1 to 6, characterized in that, There is an average included angle between each of the transmission surfaces and the axis of rotation, and at least two of the transmission surfaces have different average included angles.

9. The light source module as described in any one of claims 1 to 6, characterized in that, The transmissive surface is a recessed surface on the transmissive element that faces away from the light source; Alternatively, the transmissive surface is a protruding surface on the transmissive element that faces away from the light source.

10. A light projection device, characterized in that, include: Equipment body; And a light source module as described in any one of claims 1 to 9, disposed on the device body.

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