Light source module and light projection equipment

Abstract

The invention relates to a light source module and light projection equipment, the light source module comprises a light source, a reflecting part and a driving device, the light source is used for emitting a light beam, and the reflecting 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 reflecting part and is used for enabling the light source and the reflecting part to rotate relatively, and the rotating axis of the light source and the reflecting part does not coincide with the light path of the light beam when the light source and the reflecting part rotate relatively. The reflecting piece comprises a reflecting face facing the light source, and the inclined included angle between at least part of the reflecting face and the rotating axis is gradually increased or decreased in the circumferential direction around the rotating axis. And when the reflecting piece and the light source rotate relatively, the light beam is reflected by different parts of the reflecting surface so as to change the deflection angle of the light beam. The light source module can realize light beam offset by adopting a simple driving structure.

Description

Technical Field

[0001] The present application relates to the field of lighting technology, and in particular to a light source module and a lighting device. Background Art

[0002] In the development of modern optical technology and optical instruments, devices that can realize beam deflection play a vital role. Such devices are not only widely used in scientific research experiments, medical diagnosis, communication transmission, military reconnaissance, entertainment display and other fields, but also promote the in-depth study of optical theory and the miniaturization and integration of optical devices.

[0003] Traditionally, light beam deflection mainly relies on optical elements such as reflective mirrors and prisms. Usually, optical elements such as reflective mirrors and prisms are set at specific positions relative to the light source through calculation. If multiple deflections are required, multiple optical elements need to be used and arranged at different positions. The structure is complex, the size is large, and the effect of deflecting the light beam is single. Summary of the invention

[0004] The embodiments of the present application provide a light source module and a light projection device.

[0005] In a first aspect, the present application provides a light source module, which includes a light source, a reflector, and a driving device, wherein the light source is used to emit a light beam, and the reflector is arranged on the optical path of the light beam. The driving device is transmission-connected to at least one of the light source and the reflector, and is used to make the light source and the reflector rotate relative to each other, and the rotation axis and the optical path of the light beam do not coincide when the light source and the reflector rotate relative to each other. The reflector includes a reflecting surface facing the light source, and the inclination angle between at least part of the reflecting surface and the rotation axis increases or decreases in the circumferential direction around the rotation axis; when the reflecting component and the light source rotate relative to each other, the light beam is reflected by different parts of the reflecting surface, thereby changing the deflection angle of the light beam.

[0006] In a second aspect, the present application also provides a projection device, including a device body and the above-mentioned light source module, the light source is used to emit a light beam, and the light source module is arranged on the device body.

[0007] Compared with the prior art, when the light source module provided by the present application is used, the reflector is located on one side of the light source, and the reflective surface of the reflector is located on the optical path of the light beam emitted by the light source to reflect the light beam. The driving device drives the reflector and the light source to rotate relative to each other, and the inclination angle of the reflective surface illuminated by the light beam changes with the relative rotation of the reflector and the light source. In the embodiment of the present application, the inclination angle between at least part of the reflective surface and the rotation axis increases or decreases in the circumferential direction around the rotation axis. The reflective surface through which the light beam passes changes its inclination angle with the relative rotation of the reflector and the light source, and the deflection angle of the light beam will change when the light beam is reflected by the reflective surface with different inclination angles. The light source module provided by the embodiment of the present application can realize the offset of the light beam with a simple driving structure, and the overall size of the device is small and has high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 It is a structural schematic diagram of a light projection device provided in one embodiment of the present application.

[0010] Figure 2 yes Figure 1 A schematic structural diagram of a reflector of a light source module of a light projection device is shown.

[0011] Figure 3 yes Figure 1 A simplified optical path diagram of the light source module shown.

[0012] Figure 4 yes Figure 2 The reflective member shown is a schematic structural diagram for reflecting the first reflective surface and the second reflective surface.

[0013] Figure 5 yes Figure 2 A schematic structural diagram of another embodiment of the reflector is shown.

[0014] Figure 6 yes Figure 2 A schematic structural diagram of yet another embodiment of the reflective element is shown.

[0015] Figure 7 yes Figure 2 A schematic structural diagram of another embodiment of the reflective element is shown.

[0016] Figure 8 yes Figure 1 A structural schematic diagram of another embodiment of a light source module is shown.

[0017] Fig. 9 yes Figure 8 A schematic structural diagram of the reflector of the light source module shown.

[0018] Fig.10 yes Figure 8 A schematic structural diagram of another embodiment of the reflector is shown.

[0019] Fig.11 yes Figure 8 A schematic structural diagram of yet another embodiment of the reflective element is shown.

[0020] Fig.12 yes Figure 8 A schematic structural diagram of another embodiment of the reflective element is shown.

[0021] Explanation of reference numerals: 100, light source module; 10, driving device; 12, rotating shaft; 30, reflecting member; 301, first reflecting section; 3012, first end reflecting surface; 3014, second end reflecting surface; 303, second reflecting section; 3032, third end reflecting surface; 3034, fourth end reflecting surface; 32, central portion; 34, reflecting surface; 341, first reflecting surface; 343, second reflecting surface; 36, carrier portion; 38, supporting portion; 200, light source. DETAILED DESCRIPTION

[0022] In order 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0023] If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use differences in names as a way to distinguish components, but use differences in components' functions as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0024] See also Figure 1, the embodiment of the present application provides a light source module 100, which can be applied to a projection device 300, and the projection device 300 can be a projection lamp or an illumination lamp. The projection device 300 may include the above-mentioned 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 installing 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 be a pattern sheet, and the pattern sheet may be arranged at the light outlet of the projection device 300. The pattern sheet may be a diffraction sheet, a film sheet, etc., which can be used to make the output light of the projection device 300 form a decorative light pattern.

[0025] Please also see Figure 1 and Figure 2 In this embodiment, the light source module 100 may include a light source 200, a driving device 10 and a reflector 30. The light source 200 is used to emit a light beam P, and the reflector 30 is arranged on the optical path of the light beam P. The driving device 10 is transmission-connected to at least one of the light source 200 and the reflector 30, and is used to make the light source 200 and the reflector 30 rotate relative to each other. When the light source 200 and the reflector 30 rotate relative to each other, the rotation axis A and the optical path of the light beam P do not coincide. The reflector 30 may include a reflecting surface 34 facing the light source 200, and the inclination angle between at least part of the reflecting surface 34 and the rotation axis A increases or decreases in the circumferential direction around the rotation axis A. When the reflector 30 and the light source 200 rotate relative to each other, the light beam P is reflected by different parts of the reflecting surface 34, thereby changing the deflection angle of the light beam P.

[0026] When the light source module 100 is in use, the reflector 30 is located on one side of the light source 200, and the reflective surface 34 of the reflector 30 is located on the optical path of the light beam P emitted by the light source 200 to reflect the light beam P. The driving device 10 drives the reflector 30 and the light source 200 to rotate relative to each other, and the inclination angle of the reflective surface 34 irradiated by the light beam P changes with the relative rotation of the reflector 30 and the light source 200. In the embodiment of the present application, the inclination angle between at least part of the reflective surface 34 and the rotation axis A increases or decreases in the circumferential direction around the rotation axis A. The reflective surface 34 through which the light beam P passes changes its inclination angle with the relative rotation of the reflector 30 and the light source 200, and the deflection angle of the light beam P will change when the light beam P is reflected by the reflective surface 34 with different inclination angles. The light source module 100 provided in the embodiment of the present application can realize the displacement of the light beam P by using a simple driving structure, and the overall size of the device is small and has high stability.

[0027] This specification does not limit the specific type of the light source 200. The light source 200 can be used to emit a light beam P with a smaller beam angle. For example, the light source 200 can be a laser light source or a collimated LED light source. The light beam P emitted by the light source 200 can be a laser beam, a collimated LED beam, or a diffracted laser beam (such as a light spot or a light point). The light beam P can also be a light beam with pattern information.

[0028] This specification does not limit whether the driving device 10 is connected to the light source 200 or the reflector 30 by transmission. For example, the driving device 10 can be connected to the light source 200 by transmission, and the driving device 10 can drive the light source 200 to rotate relative to the reflector 30 around the rotation axis A. Alternatively, the driving device 10 can be connected to the reflector 30 by transmission, the light source 200 is stationary, and the driving device 10 drives the reflector 30 to rotate relative to the light source 200 around the rotation axis A. In other embodiments, the driving device 10 can be connected to both the reflector 30 and the light source 200 by transmission. The driving device 10 drives the reflector 30 and the light source 200 respectively through two sets of transmission structures, so that the respective rotation speeds of the reflector 30 and the light source 200 are different, thereby achieving the phenomenon of relative rotation of the light source 200 and the reflector 30. In this embodiment, the driving device 10 is connected to the reflector 30 by transmission, and the light source 200 can be fixedly connected to the device body.

[0029] The reflector 30 is 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 reflector 30 may include a central portion 32 and a plurality of reflecting surfaces 34 for reflecting light beams. The present specification does not limit the specific connection position of the reflector 30 and the rotating shaft 12. The rotating shaft 12 may be connected to the central portion 32 of the reflector 30 so that the reflector 30 and the rotating shaft 12 are coaxial, or the rotating shaft 12 may be connected to other positions of the reflector 30 so that the reflector 30 rotates eccentrically.

[0030] In this embodiment, the rotating shaft 12 is connected to the central part 32, the rotation axis A passes through the central part 32, the central part 32 has a circumference B surrounding the axis, and a plurality of reflecting surfaces 34 are arranged on the periphery of the central part 32 along the circumference B. Each reflecting surface 34 may include a connecting end 3401 and an extending end 3403, the connecting end 3401 is connected to the central part 32, and the extending end 3403 is located at an end of the reflecting surface 34 away from the central part 32. A geometric center line between the connecting end 3401 and the extending end 3403 of each reflecting surface 34 defines a virtual line segment L, and an inclination angle b is formed between the virtual line segment L of each reflecting surface 34 and the rotation axis A, and at least two reflecting surfaces 34 among the plurality of reflecting surfaces 34 have different inclination angles b. The driving device 10 is used to drive the reflecting member 30 to rotate so that the light beam P is reflected by different reflecting surfaces 34, thereby changing the deflection angle of the light beam P.

[0031] When in use, the reflector 30 is located on one side of the light source 200, and the reflective surface 34 of the reflector 30 is located on the optical path of the light beam P emitted by the light source 200 to reflect the light beam P. The driving device 10 drives the reflector 30 to rotate relative to the light source 200, and the reflective surface 34 irradiated by the light beam P changes with the rotation of the reflector 30. In the embodiment of the present application, at least two of the multiple reflective surfaces 34 have different inclination angles b. The multiple reflective surfaces 34 change positions with the rotation of the reflector 30, and the deflection angle of the light beam P will change when the light beam P is reflected by the reflective surfaces 34 with different inclination angles b. The light source module 100 provided in the embodiment of the present application can achieve the offset of the light beam P by adopting a simple driving structure, and the overall size of the device is small and has high stability.

[0032] The connecting end 3401 and the extending end 3403 of each reflecting surface 34 are two opposite ends of each reflecting surface 34 in the radial direction of the reflecting member 30. The connecting end 3401 and the extending end 3403 can be understood as the contour lines of the two ends of the reflecting surface 34. Figure 2 As shown, the virtual line segment L is a line connecting the geometric center of the connecting end 3401 and the geometric center of the extending end 3403. The tilt angle b between the virtual line segment L and the rotation axis A can represent the tilt degree of the reflective surface 34 relative to the rotation axis A.

[0033] In this embodiment, the driving device 10 is used to drive the reflector 30 to rotate. This specification does not limit the specific structure of the driving device 10. For example, the driving device 10 may include any one of the driving sources such as a rotary motor and a rotary cylinder. Alternatively, the driving device 10 may also include a transmission structure, such as a screw, a screw nut or a gear set. In this embodiment, the driving device 10 is a rotary motor, and the driving device 10 has a rotating shaft 12. The driving device 10 outputs a rotation torque through the rotating shaft 12.

[0034] The central portion 32 of the reflector 30 is fixedly connected to the rotating shaft 12 of the driving device 10, and the reflective surface 34 of the reflector 30 is used to reflect the light beam P emitted by the light source 200. It should be understood that the "fixed connection" between the reflector 30 and the rotating shaft 12 should be understood as that the reflector 30 and the rotating shaft 12 are relatively fixed, and the reflector 30 can rotate with the rotation of the rotating shaft 12. This specification does not limit the specific structure of the reflector 30. For example, the reflector 30 may include a reflector, or may include a carrier and a reflective film attached to the carrier, or the reflector 30 may also be a surface structure capable of reflecting light.

[0035] As an example, the reflector 30 may further include a carrier portion 36, the carrier portion 36 being connected to the periphery of the center portion 32 along the circumferential direction B of the center portion 32, and the reflective surface 34 being provided on a side surface of the carrier portion 36 located on the optical path of the light beam P. The present specification does not limit the specific shape and structure of the reflective surface 34, and the reflective surface 34 may include at least one of a mirror structure, a reflective film structure, and a reflective microstructure attached to the carrier portion 36. There are multiple reflective surfaces 34, and the multiple reflective surfaces 34 may cover the entire surface of the carrier portion 36 facing the light source 200, or may only cover a portion of the surface; the multiple reflective surfaces 34 may be continuous surfaces or spaced surfaces; the reflective surface 34 may be a curved surface, a plane, or a spherical surface. In this embodiment, at least one of the multiple reflective surfaces 34 is a curved surface; or at least one of the multiple reflective surfaces 34 is a plane.

[0036] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In this embodiment, the plurality of reflection surfaces 34 are sequentially connected along the circumferential direction B, and the plurality of reflection surfaces 34 cover the entire surface of the carrier portion 36 facing the light source 200. In order to ensure that the light beam P can be irradiated onto the reflection surface 34, the optical path of the light beam P does not coincide with the rotation axis A. The plurality of reflection surfaces 34 may include a first reflection surface 341 and a second reflection surface 343 arranged at the head and tail along the circumferential direction B. The first reflection surface 341 and the second reflection surface 343 are arranged at the head and tail along the circumferential direction B, which can be understood as follows: in the circumferential direction B, the plurality of reflection surfaces 34 other than the first reflection surface 341 and the second reflection surface 343 are all located between the first reflection surface 341 and the second reflection surface 343. The inclination angle b of the first reflection surface 341 is smaller than the inclination angle b of the second reflection surface 343, and in the direction from the first reflection surface 341 to the second reflection surface 343, the inclination angles b of the plurality of reflection surfaces 34 change continuously and increase progressively.

[0038] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] The inclination angle b of the first reflecting surface 341 is smaller than the inclination angle b of the second reflecting surface 343, which can be understood as: the first reflecting surface 341 is closer to the rotation axis A than the second reflecting surface 343, and the inclination arc of the first reflecting surface 341 relative to the rotation axis A is larger. Here, the positional relationship of "close to" is based on the orientation or positional relationship shown in the accompanying drawings, which is only a simplified description for the convenience of describing the present application, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The above-mentioned "direction from the first reflecting surface 341 to the second reflecting surface 343" is understood to be the direction passing through the first reflecting surface 341, the multiple reflecting surfaces 34 therebetween, and the second reflecting surface 343 in sequence. As an example, Figure 2 As shown, the direction from the first reflective surface 341 to the second reflective surface 343 is counterclockwise. In the counterclockwise direction, the tilt angles b of the plurality of reflective surfaces 34 continuously change and increase.

[0040] The light beam P emitted by the light source 200 is irradiated onto the reflective surface 34, and the driving device 10 drives the reflective member 30 to rotate. In the counterclockwise direction, the tilt angles b of the multiple reflective surfaces 34 increase. If the driving device 10 drives the reflective member 30 to rotate counterclockwise, the light beam P is sequentially reflected by the reflective surfaces 34 whose tilt angles b continuously change and increase. During the rotation of the reflective member 30, the reflected light P1 is offset from the outside to the inside (e.g., Figure 3 As shown). Among them, "the outgoing light P1 is offset from the outside to the inside" is understood as the outgoing light P is offset from a position relatively far away from the light source 200 to gradually close to the light source 200. If the driving device 10 drives the reflector 30 to rotate clockwise, the outgoing light P1 is offset from the inside to the outside. Among them, "the outgoing light P1 is offset from the inside to the outside" is understood as the outgoing light P is offset from a position relatively close to the light source 200 to gradually away from the light source 200. The reflective surface 34 illuminated by the light beam P changes continuously with the rotation of the reflective component 30, and the deflection angle of the outgoing light P1 changes with the change of the average angle of the reflective surface 34, thereby achieving the effect of continuous outward or inward offset of the outgoing light P1, until the reflector 30 rotates a cycle and returns to the starting point, then the outgoing light P1 also returns to the starting point, and a new offset cycle begins.

[0041] The driving device 10 drives the reflector 30 to rotate to achieve unidirectional cyclic deviation of the light beam, which is simple to operate and has high stability. The light source module 100 has a simple structure and a small overall size. The light source module 100 uses the reflector 30 to achieve light beam deviation, which avoids chromatic aberration caused by different refractive indices of the same material for different wavelengths compared to the deviation achieved by transmission, and can maintain a good light mixing effect of the light beam.

[0042] In this embodiment, the reflective surface 34 can be either a curved surface or a flat surface. As an example, the multiple reflective surfaces 34 are all curved surfaces, and the virtual line segment L of each reflective surface 34 coincides with the reflective surface 34. The multiple reflective surfaces 34 between the first reflective surface 341 and the second reflective surface 343 are smoothly connected in the circumferential direction B. The aforementioned "connection" can be understood as the surfaces of the multiple reflective surfaces 34 smoothly transitioning to each other at the adjacent parts, such as the connection gap is less than a specified value, or the two are located in the same plane, or the curved surfaces defined by the two are continuous, etc.; or it can be understood as the multiple reflective surfaces 34 jointly forming a specific appearance contour, such as jointly forming a curved surface structure. In this embodiment, the multiple reflective surfaces 34 jointly form a curved surface structure, and there is no obvious dividing line between two adjacent reflective surfaces 34. The central portion 32 of the reflector 30 can be concave or convex relative to the reflective surface 34 in the circumferential direction. There is a distance between the first reflective surface 341 and the second reflective surface 343, and the reflector 30 can also include a support portion 38. The first reflective surface 341 and the second reflective surface 343 may be connected via a support portion 38 , a plane where the support portion 38 is located intersects both the first reflective surface 341 and the second reflective surface 343 , and an outgoing light beam P of the light source 200 is parallel to the plane where the support portion 38 is located.

[0043] This specification does not limit the specific structure of each reflective surface 34. Please also refer to Figure 1 and Figure 4 , an angle is formed between the tangent plane at any point of each reflecting surface 34 and the rotation axis A, there is an average angle between the reflecting surface 34 as a whole and the rotation axis A, and the average angles of at least two reflecting surfaces 34 among the multiple reflecting surfaces 34 are different from each other. Regarding the tangent plane at any point of the reflecting surface 34, if the reflecting surface 34 is a curved surface, the tangent plane at any point of the reflecting surface 34 is understood to be a plane passing through the point and tangent to the reflecting surface 34 at the point; if the reflecting surface 34 is a plane, the tangent plane at any point of the reflecting surface 34 is the reflecting surface 34 itself. A specified curve C around the rotation axis A is set on the overall surface formed by all the reflecting surfaces 34, and the specified curve C passes through each reflecting surface 34, and the distance between each point on the specified curve C and the central part 32 is equal. The average angle between each reflecting surface 34 as a whole and the rotation axis A can be understood as: the average angle between the tangent plane of each point on the specified curve C in each reflecting surface 34 and the rotation axis A. In the direction from the first reflective surface 341 to the second reflective surface 343 , the angle between the tangent plane at any point of each reflective surface 34 and the rotation axis A increases gradually.

[0044] The present specification does not limit the specific shape of the reflector 30. For example, the reflector 30 may be a concave reflective structure or a convex reflective structure. Figure 1As shown, the reflecting surface 34 is a surface on the reflecting member 30 that is recessed relative to the light source 200. The central portion 32 and the plurality of reflecting surfaces 34 constitute the end surface of the reflecting member 30. The end surface of the reflecting member 30 is recessed in the central portion 32, so that the reflecting member 30 is generally in the shape of a cover. The reflecting surface 34 is located on the inner surface of the reflecting member 30, and the light beam P is irradiated onto the inner surface of the reflecting member 30. As another example, Figure 5 As shown, the reflective surface 34 is a surface on the reflector 30 that protrudes relative to the light source 200 . The end surface of the reflector 30 protrudes at the center portion 32 , and the reflective surface 34 is located on the outer surface of the reflector 30 , and the light beam P irradiates the outer surface of the reflector 30 .

[0045] In another embodiment, see Figure 6 , the multiple reflecting surfaces 34 are all planes, and the virtual line segment L of each reflecting surface 34 coincides with the reflecting surface 34. Each reflecting surface 34 is roughly a fan-shaped plane, and the planes where the multiple reflecting surfaces 34 are located are all intersecting, and there is a clear dividing line between two adjacent reflecting surfaces 34. The angle between the tangent plane at any point in each reflecting surface 34 and the rotation axis A is equal, and in the direction from the first reflecting surface 341 to the second reflecting surface 343, the angle formed between the multiple reflecting surfaces 34 and the rotation axis A increases. When the reflecting surface 34 is a plane, the emitted light P1 will be deflected in a jumping manner as the reflector 30 rotates.

[0046] In this embodiment, the reflector 30 may be a concave reflective structure or a convex reflective structure. For example, Figure 6 As shown, the reflective surface 34 is a surface on the reflector 30 that is recessed relative to the light source 200. The central portion 32 and the plurality of reflective surfaces 34 constitute the end surface of the reflector 30, and the end surface of the reflector 30 is recessed in the central portion 32; as another example, Figure 7 As shown, the reflective surface 34 is a surface on the reflective member 30 that protrudes relative to the light source 200. The end surface of the reflective member 30 protrudes at the central portion 32.

[0047] Please also see Figure 8 and Fig. 9 In other embodiments, the multiple reflection surfaces 34 can realize the reciprocating displacement motion of the emitted light P1, and the multiple reflection surfaces 34 are adjacent to each other and connected in sequence along the circumferential direction B. The reflector 30 is divided into a first reflection interval 301 and a second reflection interval 303, and the multiple reflection surfaces 34 are distributed in the first reflection interval 301 and the second reflection interval 303. The multiple reflection surfaces 34 in the first reflection interval 301 and the multiple reflection surfaces 34 in the second reflection interval 303 are symmetrically arranged about a designated plane M passing through the rotation axis A.

[0048] The multiple reflection surfaces 34 in the first reflection interval 301 may include a first end reflection surface 3012 and a second end reflection surface 3014, and the first end reflection surface 3012 and the second end reflection surface 3014 are respectively located at two ends of the first reflection interval 301. The tilt angle b of the first end reflection surface 3012 is smaller than the tilt angle b of the second end reflection surface 3014, and in the direction from the first end reflection surface 3012 to the second end reflection surface 3014, the tilt angles b of the multiple reflection surfaces 34 increase.

[0049] The fact that the tilt angle b of the first end reflection surface 3012 is smaller than the tilt angle b of the second end reflection surface 3014 can be understood as follows: the first end reflection surface 3012 is closer to the rotation axis A than the second end reflection surface 3014, and the first end reflection surface 3012 has a larger tilt arc relative to the rotation axis A. The above-mentioned “direction from the first end reflection surface 3012 to the second end reflection surface 3014” is understood as a direction that passes through the first end reflection surface 3012, the multiple reflection surfaces 34 therebetween, and the second end reflection surface 3014 in sequence. As an example, Fig. 9 As shown, the direction from the first end reflection surface 3012 to the second end reflection surface 3014 is clockwise.

[0050] The multiple reflection surfaces 34 in the second reflection interval 303 and the multiple reflection surfaces 34 in the first reflection interval 301 are symmetrically arranged about a plane passing through the rotation axis A. The multiple reflection surfaces 34 in the second reflection interval 303 may include a third end reflection surface 3032 and a fourth end reflection surface 3034, and the third end reflection surface 3032 and the fourth end reflection surface 3034 are respectively located at two ends of the second reflection interval 303. The inclination angle b of the third end reflection surface 3032 is smaller than the inclination angle b of the fourth end reflection surface 3034, and in the direction from the third end reflection surface 3032 to the fourth end reflection surface 3034, the inclination angles b of the multiple reflection surfaces 34 increase.

[0051] The fact that the tilt angle b of the third end reflection surface 3032 is smaller than the tilt angle b of the fourth end reflection surface 3034 can be understood as follows: the third end reflection surface 3032 is closer to the rotation axis A than the fourth end reflection surface 3034, and the tilt arc of the third end reflection surface 3032 relative to the rotation axis A is larger. The above-mentioned “direction from the third end reflection surface 3032 to the fourth end reflection surface 3034” is understood as a direction that passes through the third end reflection surface 3032, the multiple reflection surfaces 34 therebetween, and the fourth end reflection surface 3034 in sequence. In this embodiment, as Fig. 9 As shown, the third end reflection surface 3032 and the first end reflection surface 3012 are symmetrically arranged and connected to each other, and the fourth end reflection surface 3034 and the second end reflection surface 3014 are symmetrically arranged and connected to each other, and the direction from the third end reflection surface 3032 to the fourth end reflection surface 3034 is counterclockwise.

[0052] The light beam P emitted by the light source 200 is irradiated onto the reflective surface 34, and the driving device 10 drives the reflective member 30 to rotate. As an example, the initial light beam P is irradiated onto the fourth end reflective surface 3034. If the driving device 10 drives the reflective member 30 to rotate counterclockwise, the light beam P is sequentially reflected by the reflective surface 34 with decreasing average angle in the second reflective interval 303, and the emitted light P1 is offset from the outside to the inside. The reflective member 30 rotates into the first reflective interval 301, and the light beam P is sequentially irradiated onto the reflective surface 34 with increasing average angle along the direction from the first end reflective surface 3012 to the second end reflective surface 3014, and the emitted light P1 is offset from the inside to the outside. The reflective member 30 rotates counterclockwise for one circle, and the emitted light P1 can be offset from the outside to the inside, and then from the inside to the outside. Similarly, if the reflective member 30 rotates clockwise for one circle, the emitted light P1 can be offset from the inside to the outside, and then from the outside to the inside.

[0053] In this embodiment, the plurality of reflective surfaces 34 may all be curved surfaces, and the virtual line segment L of each reflective surface 34 overlaps with the reflective surface 34. Fig. 9 As shown, the multiple reflection surfaces 34 are smoothly connected along the circumferential direction B. The first end reflection surface 3012 and the third end reflection surface 3032 are smoothly connected, and the second end reflection surface 3014 and the fourth end reflection surface 3034 are smoothly connected. In the direction from the first end reflection surface 3012 to the second end reflection surface 3014, the angle formed between the tangent plane of any point in the first end reflection surface 3012 and the rotation axis A increases. In the direction from the third end reflection surface 3032 to the fourth end reflection surface 3034, the angle formed between the tangent plane of any point in the third end reflection surface 3032 and the rotation axis A increases.

[0054] In this embodiment, the reflector 30 may be a concave reflective structure or a convex reflective structure. For example, Fig. 9 As shown, the central portion 32 and the plurality of reflecting surfaces 34 constitute the end surface of the reflecting member 30, and the end surface of the reflecting member 30 is recessed in the central portion 32; as another example, Fig.10 As shown, the end surface of the reflector 30 protrudes at the central portion 32 .

[0055] See also Fig.11As another example, the multiple reflective surfaces 34 are all planes, and the virtual line segment L of each reflective surface 34 coincides with the reflective surface 34. Each reflective surface 34 is roughly a fan-shaped plane, and the planes where the multiple reflective surfaces 34 are located are all intersecting, and there is a clear dividing line between two adjacent reflective surfaces 34. The angle between the tangent plane at any point in each reflective surface 34 and the rotation axis A is equal, and in the direction from the first end reflective surface 3012 to the second end reflective surface 3014, the angles formed between the multiple reflective surfaces 34 and the rotation axis A increase successively. When the reflective surface 34 is a plane, the emergent light P1 will be deflected in a jumping manner as the reflector 30 rotates.

[0056] In this embodiment, the reflector 30 may be a concave reflective structure or a convex reflective structure. For example, Fig.11 As shown, the central portion 32 and the plurality of reflecting surfaces 34 constitute the end surface of the reflecting member 30, and the end surface of the reflecting member 30 is recessed in the central portion 32; as another example, Fig.12 As shown, the end surface of the reflector 30 protrudes at the central portion 32 .

[0057] When the light source module 100 provided in the embodiment of the present application is in use, the reflector 30 is located on one side of the light source 200, and the reflective surface 34 of the reflector 30 is located on the optical path of the light beam P emitted by the light source 200 to reflect the light beam P. The driving device 10 drives the reflector 30 to rotate relative to the light source 200, and the reflective surface 34 irradiated by the light beam P changes with the rotation of the reflector 30. In the embodiment of the present application, at least two reflective surfaces 34 among the multiple reflective surfaces 34 have different inclination angles b. The multiple reflective surfaces 34 change positions with the rotation of the reflector 30, and the deflection angle of the light beam P will change when the light beam P is reflected by the reflective surfaces 34 with different inclination angles b. The light source module 100 provided in the embodiment of the present application can achieve the offset of the light beam P by adopting a simple driving structure, and the overall size of the device is small and has high stability.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements 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 the present application.

Claims

1. A light source module, characterized in that: include: A light source for emitting a light beam; A reflector, arranged on the optical path of the light beam; and a driving device, which is transmission-connected to at least one of the light source and the reflector and is used to make the light source and the reflector rotate relative to each other, wherein the rotation axis of the light source and the reflector do not coincide with the optical path of the light beam when the light source and the reflector rotate relative to each other; The reflector includes a reflective surface facing the light source, and an inclination angle between at least a portion of the reflective surface and the rotation axis increases or decreases in a circumferential direction around the rotation axis; when the reflector and the light source rotate relative to each other, the light beam is reflected by different parts of the reflective surface, thereby changing the deflection angle of the light beam.

2. The light source module according to claim 1, characterized in that: The reflector includes a plurality of reflective surfaces, which are connected in sequence along the circumference of the reflector, and include a first reflective surface and a second reflective surface arranged at the head and the tail along the circumference, and the inclination angle of the first reflective surface is smaller than the inclination angle of the second reflective surface; in the direction from the first reflective surface to the second reflective surface, the inclination angles of the plurality of reflective surfaces change continuously and increase gradually.

3. The light source module according to claim 2, characterized in that: The plurality of reflection surfaces between the first reflection surface and the second reflection surface are sequentially connected along the circumferential direction, and there is a distance between the first reflection surface and the second reflection surface.

4. The light source module according to claim 1, characterized in that: The multiple reflecting surfaces are adjacent to each other and connected in sequence end to end along the circumferential direction, the reflecting member is divided into a first reflecting interval and a second reflecting interval, the multiple reflecting surfaces are distributed in the first reflecting interval and the second reflecting interval, and the multiple reflecting surfaces in the first reflecting interval and the multiple reflecting surfaces in the second reflecting interval are symmetrically arranged about a designated plane passing through the rotation axis.

5. The light source module according to claim 4, characterized in that: The multiple reflection surfaces within the first reflection interval include a first end reflection surface and a second end reflection surface, and the first end reflection surface and the second end reflection surface are respectively located at two ends of the first reflection interval; in the direction from the first end reflection surface to the second end reflection surface, the inclination angles of the multiple reflection surfaces increase gradually.

6. The light source module according to claim 5, characterized in that: The multiple reflection surfaces within the second reflection interval include a third end reflection surface and a fourth end reflection surface, and the third end reflection surface and the fourth end reflection surface are respectively located at the two ends of the second reflection interval; the third end reflection surface and the first end reflection surface are symmetrically arranged and connected to each other, and the fourth end reflection surface and the second end reflection surface are symmetrically arranged and connected to each other.

7. The light source module according to any one of claims 1 to 6, characterized in that: At least one of the multiple reflecting surfaces is a curved surface, or at least one of the multiple reflecting surfaces is a flat surface, or all of the multiple reflecting surfaces are curved surfaces, or all of the multiple reflecting surfaces are flat surfaces.

8. The light source module according to any one of claims 1 to 6, characterized in that: There is an average angle between each of the reflecting surfaces as a whole and the rotation axis, and the average angles of at least two of the reflecting surfaces among the plurality of reflecting surfaces are different from each other.

9. The light source module according to any one of claims 1 to 6, characterized in that: The reflecting surface is a surface on the reflecting member that is concave relative to the light source; Alternatively, the reflective surface is a surface on the reflective element that is protruding relative to the light source.

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

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