Projection imaging device and luminaire

Abstract

The application discloses a projection imaging device and a lamp. The projection imaging device comprises a first light source, a rotating mechanism, a diffraction grating and a translation mechanism. The first light source is used for generating outgoing light. The rotating mechanism is arranged at intervals from the first light source. The diffraction grating is arranged on the rotating mechanism and can rotate around a predetermined axis to the light path of the outgoing light under the driving of the rotating mechanism, so that the outgoing light can be emitted through the diffraction grating. The predetermined axis is not parallel to the light path of the outgoing light. The diffraction grating is further connected to the translation mechanism. The diffraction grating enters or exits the coverage range of the outgoing light along the direction of the predetermined axis under the driving of the translation mechanism. The projection imaging device has a linear motion light effect, which enriches the viewing experience of users.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection imaging, and more particularly to a projection imaging device and a lamp. BACKGROUND

[0002] The existing starry sky lamp often adopts a technical solution of laser irradiating a rotatable grating sheet to present a starry sky rotating projection picture. Or, on the basis of the above technical solution, a grating sheet is fixed at the laser emitting port, and the two grating sheets are irradiated to present the effect of irregular rotation of part of the star points (i.e. light spots) on the basis of the overall rotation of the starry sky.

[0003] Since the rotatable grating sheet is adopted in the above technical solution, only the rotating movement of the light spot can be achieved, and other dynamics of the light spot cannot be achieved, and the imaging effect is relatively single. SUMMARY

[0004] The present application provides a projection imaging device and a lamp.

[0005] According to a first aspect of the present application, the present application provides a projection imaging device, which comprises a first light source, a rotating mechanism, a diffraction grating and a translation mechanism. The first light source is used to generate outgoing light. The rotating mechanism is arranged at a distance from the first light source. The diffraction grating is arranged on the rotating mechanism and can be rotated about a predetermined axis into the light path of the outgoing light under the driving of the rotating mechanism, so that the outgoing light can be emitted through the diffraction grating. The predetermined axis is not parallel to the light path of the outgoing light. The diffraction grating is further connected to the translation mechanism, and the diffraction grating enters or exits the coverage range of the outgoing light in the direction of the predetermined axis under the driving of the translation mechanism. The projection light spot of the above projection imaging device has a linear motion light effect.

[0006] According to a second aspect of the present application, the present application provides a lamp, which comprises a circuit board and any one of the above projection imaging devices. The projection imaging device is electrically connected to the circuit board.

[0007] The present application provides a projection imaging device and a lamp. In the projection imaging device, the outgoing light generated by the first light source is emitted onto the diffraction grating, so that the light rays emitted through the diffraction grating carry a plurality of diffraction light spots, and an image containing a plurality of star points (i.e. diffraction light spots) can be formed when imaging on the projection surface. In addition, the projection imaging device further comprises a rotating mechanism connected to the diffraction grating. The diffraction grating rotates under the driving of the rotating mechanism, so that the outgoing light is swept on the diffraction grating. During the rotation of the diffraction grating, the diffraction light spots corresponding to the outgoing light also move linearly on the projection surface, so that the plurality of star points present linear motion on the imaging surface, creating an effect similar to the movement of a meteor, and enriching the viewing experience of the user.

[0008] In actual application, the number of the above elements is not limited, when the diffraction grating and the corresponding rotating mechanism, the first light source are provided with multiple, the outgoing light is emitted through multiple diffraction gratings to form multiple light spots or star points and other patterns on the projection surface, the linear movement rule of the multiple light spots or star points and other patterns is related to the arrangement of the rotating mechanism. For example, when the multiple rotating mechanisms are arranged in a circle, the linear movement rule of the multiple light spots or star points and other patterns can present the effect of diverging from the center to the periphery or shrinking from the periphery to the center; for another example, when the multiple rotating mechanisms are arranged in an array, the linear movement rule of the multiple light spots or star points and other patterns can present the effect of array movement, similar to the effect of meteor shower falling. Therefore, the projection imaging device and the lamp provided by the embodiments of the present application can realize multiple imaging effects, and can enrich the viewing experience of users. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0010] Figure 1 is a structural schematic diagram of the projection imaging device provided by the embodiments of the present application.

[0011] Figure 2 is another structural schematic diagram of the projection imaging device provided by the embodiments of the present application.

[0012] Figure 3 is Figure 1 is an assembly schematic diagram of the rotating mechanism and the diffraction grating of the projection imaging device in the embodiment.

[0013] Figure 4 is Figure 3 is a three-dimensional exploded schematic diagram of the rotating mechanism and the diffraction grating.

[0014] Figure 5 is Figure 1 is a front projection schematic diagram of the rotating mechanism, the diffraction grating and the first light source of the projection imaging device in the embodiment in the assembled state.

[0015] Figure 6 is another structural schematic diagram of the projection imaging device provided by the embodiments of the present application.

[0016] Figure 7 is a schematic diagram of a variant structure of the rotating mechanism and the driving mechanism of the projection imaging device provided by the embodiments of the present application.

[0017] Figure 8is a simplified schematic diagram of a projection imaging device. Figure 5 is a simplified schematic diagram of a projection imaging device.

[0018] Figure 9 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device provided by an embodiment of the present application.

[0019] Figure 10 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. Figure 9

[0020] Figure 11 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. Figure 10

[0021] Figure 12 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. Figure 9

[0022] Figure 13 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. Figure 12

[0023] Figure 14 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. Figure 13

[0024] Figure 15 is a structural schematic diagram of a rotating mechanism and a translation mechanism of a projection imaging device. DETAILED DESCRIPTION

[0025] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work fall within the scope of protection of the present application.

[0026] Please refer to Figure 1 and Figure 2 , the present application provides a projection imaging device 100. The projection imaging device 100 can be applied to a projection lamp, which is a kind of lamp for projecting a specified pattern to an imaging surface or a projection surface (for example, a ground, a wall, a ceiling, etc. a light-reflecting part). According to different specified patterns, the projection lamp can include a LOGO projection lamp, an advertisement projection lamp, a starry sky projection lamp, etc.

[0027] ​​​​​In the embodiment of the present application, the projection imaging device 100 comprises a first light source 10, a rotating mechanism 30 and a diffraction grating 40. The first light source 10 is configured to generate outgoing light. The rotating mechanism 30 is arranged at a distance from the first light source 10, and the diffraction grating 40 is arranged on the rotating mechanism 30 and can rotate about a predetermined axis to the light path of the outgoing light under the driving of the rotating mechanism, so that the outgoing light can be emitted through the diffraction grating 40. Therefore, the light emitted through the diffraction grating 40 carries a plurality of diffraction spots, and an image containing a plurality of star points (i.e., diffraction spots) can be formed during imaging. The diffraction grating 40 is connected to the rotating mechanism 30, and the diffraction grating 40 rotates under the driving of the rotating mechanism 30, so that the outgoing light is scanned on the diffraction grating 40. The incident angle of the outgoing light on the diffraction grating 40 changes, and the outgoing angle of the outgoing light after transmitting the diffraction grating 40 also changes. Therefore, during the rotation of the diffraction grating 40, the diffraction spot corresponding to the outgoing light also moves linearly on the projection surface, and the plurality of diffraction spots move linearly on the imaging surface, creating an effect similar to the movement of a meteor shower, and enriching the viewing experience of the user.

[0028] Further, in the embodiment of the present application, the predetermined axis is not parallel to the light path of the outgoing light, which allows the first light source 10 to be arranged at a distance from the predetermined axis, i.e., the rotation axis of the diffraction grating 40, so as to save the installation space on the predetermined axis. At the same time, when the diffraction grating 40 moves about the predetermined axis, it is not necessary to set an additional speed reduction mechanism or transmission mechanism to avoid the first light source 10, but to utilize the feature that the predetermined axis is not parallel to the light path of the outgoing light, and to reasonably arrange the driving and transmission mechanism of the diffraction grating 40 and the position of the first light source 10, which is conducive to making the structure of the projection imaging device 100 more compact and stable.

[0029] The diffraction grating 40 provided in the embodiment of the present application is an optical element that periodically modulates the amplitude or / and phase of light through a regular structure. According to the shape of the light spot formed by the transmission of light through the diffraction grating 40, the diffraction grating 40 can comprise at least one structure of a cross-shaped diffraction grating, a matrix diffraction grating, a fan-shaped diffraction grating, a full-sky diffraction grating, etc.

[0030] Please refer to Figure 2In some embodiments, the projection imaging device 100 further comprises a housing 50, an inner portion of the housing 50 is provided with a receiving space 52, the receiving space 52 is used to accommodate the first light source 10, the rotating mechanism 30 and the diffraction grating 40, so as to form a protection and accommodation effect for these components or parts. In some embodiments, the housing 50 is provided with an outlight port 521, the outlight port 521 is communicated between the receiving space 52 and the outside, so as to be used for emitting light out of the housing 50, that is, the outlight port 521 is located on the light path of the light emitted through the diffraction grating 40, and the light emitted through the diffraction grating 40 can be projected to an imaging surface (for example, a wall surface) through the outlight port 521 on the housing 50.

[0031] Further, in the present embodiment, in order to make the structure of the projection imaging device 100 more firm, the projection imaging device 100 can further comprise a base plate 60, the base plate 60 is fixedly arranged in the housing 50 and is arranged in a spaced-apart manner with the outlight port 521, and the first light source 10 and the rotating mechanism 30 are both mounted on the base plate 60. Specifically, the base plate 60 is substantially in a flat plate structure, and comprises a first mounting surface 62 and a second mounting surface 64 which are away from each other, the first mounting surface 62 faces the outlight port 521, and the second mounting surface 64 faces a bottom wall of the housing 50. The first light source 10 and the rotating mechanism 30 are both mounted on the first mounting surface 62.

[0032] In the present embodiment, the first light source 10 is fixed in the inner portion of the housing 50, for example, it can be fixed on the first mounting surface 62 of the base plate 60 through a threaded fastener or the like. The first light source 10 can be a laser generator, that is, the emitted light is a laser. Specifically, the first light source 10 can be a single-wavelength laser generator, for example, the first light source 10 is a green laser generator with a wavelength of 532 nm. The first light source 10 can also be a tunable broadband laser generator, which can generate and emit laser with a specified wavelength. Further, in the present embodiment, the direction of the light path of the emitted light of the first light source 10 is from the base plate 60 to the outlight port 521, and the light path of the emitted light can be substantially perpendicular to the base plate 60.

[0033] The rotating mechanism 30 is mounted on the base plate 60 and is arranged in a spaced-apart manner with the first light source 10. The rotating mechanism 30 is used to drive the diffraction grating 40 to rotate around a predetermined axis O, so as to form a linearly moving light effect. The rotating mechanism 30 can comprise a connecting seat 36 and a rotating piece 32, the connecting seat 36 is fixedly arranged on the base plate 60, the rotating piece 32 is rotatably arranged on the connecting seat 36, the diffraction grating 40 is arranged on the rotating piece 32, when the rotating piece 32 rotates relative to the connecting seat 36, the diffraction grating 40 rotates around the predetermined axis O, and the rotation axis of the rotating piece 32 is the predetermined axis O.

[0034] Please refer to Figure 3 and Figure 4As an example, the connecting seat 36 can include a connecting portion 361, a mounting portion 363 and a transition portion 365. The connecting portion 361 is connected to the first mounting surface 62 of the substrate 60 by a fastener such as a screw. The mounting portion 363 is connected to the connecting portion 361 and is bent and protruded relative to the connecting portion 361. Specifically, the mounting portion 363 can be substantially plate-shaped and substantially perpendicular to the substrate 60. The transition portion 365 is disposed at one end of the mounting portion 363 away from the connecting portion 361 and protrudes relative to the mounting portion 363. The transition portion 365 is located at the side of the mounting portion 363 facing the first light source 10. The transition portion 365, the mounting portion 363 and the connecting portion 361 can be integrally formed or assembled. The transition portion 365 is used to mount the rotating member 32. Specifically, the transition portion 365 can be substantially shaft-shaped. The rotating member 32 has a receiving hole 321 at the center of rotation. The rotating member 32 is rotatably sleeved on the transition portion 365 through the receiving hole 321. Therefore, when the rotating member 32 is driven to rotate, the relative rotation between the rotating member 32 and the connecting seat 36 is realized based on the hole-shaft cooperation structure between the receiving hole 321 and the transition portion 365. In the embodiments of the present application, the specific implementation form of the rotating mechanism 30 driving the rotating member 32 should not be limited.

[0035] As an example, the rotating mechanism 30 itself can have a driving source and can be driven to rotate by itself. Specifically, the rotating mechanism 30 can further include a rotating drive member (not shown in the figure). The rotating drive member is disposed on the first mounting surface 62 of the substrate 60 or on the connecting seat 36. The axis of the driving shaft of the rotating drive member is the predetermined axis O, which is substantially perpendicular to the light path of the outgoing light or substantially parallel to the substrate 60. The rotating drive member can be a rotating motor, or a rotating motor with a reduction box, or a rotating drive device such as a rotating rudder. The rotating member 32 can be substantially disc-shaped or turntable-shaped and is connected to the output end of the rotating drive member and disposed adjacent to the first light source 10. The rotating member 32 has two surfaces facing away from each other. The surface of the rotating member 32 relatively close to the first light source 10 (which can be considered as an end surface) is used to mount the diffraction grating 40. When the rotating member 32 is driven to rotate by the rotating drive member, the rotating member 32 drives the diffraction grating 40 to rotate, so that the incident angle of the outgoing light on the diffraction grating 40 changes with the rotation.

[0036] As another example, please refer again to Figure 2The rotating mechanism 30 can be driven by a dedicated driving mechanism 70, and the rotating mechanism 30 serves as a rotating executor. Specifically, in the embodiment, the projection imaging device 100 further comprises a driving mechanism 70 mounted on the substrate 60. The driving mechanism 70 comprises a rotating driving source 72 and a transmission member 74. The rotating driving source 72 is mounted on the substrate 60, for example, on the side of the substrate 60 away from the light outlet 521, i.e. on the second mounting surface 64 of the substrate 60, so that the rotating mechanism 30 or the first light source 10 is located on the opposite side of the substrate 60, which is beneficial to improve the space utilization of the projection imaging device 100 and make the structure of the projection imaging device 100 more compact. The rotating driving source 72 can be a rotating motor, or a rotating motor with a reduction gearbox, or a rotating steering engine.

[0037] In the embodiment, the rotating member 32 is rotatably arranged on the first mounting surface 62 of the substrate 60 and connected to the driving end of the rotating driving source 72 through the transmission member 74, so as to rotate around the predetermined axis O under the driving of the rotating driving source 72. At this time, the rotation axis of the rotating member 32 is the predetermined axis O, which is substantially perpendicular to the light path of the outgoing light or substantially parallel to the substrate 60. Specifically, the transmission member 74 is movably arranged through the substrate 60 and in transmission connection with the rotating member 32. In the embodiment, the rotating member 32 is a gear, the transmission member 74 is a worm, and the gear is in mesh with the worm. The diffraction grating 40 is arranged on the end surface of the gear facing the first light source 10. Specifically, the substrate 60 can be provided with a through hole penetrating the first mounting surface 62 and the second mounting surface 64. One end of the worm is connected to the rotating driving source 72, and the worm is movably arranged through the through hole to mesh with the gear. In the embodiment, the gear can be a cylindrical gear structure, such as a helical cylindrical gear, an arc tooth cylindrical gear, etc., so as to mesh with the worm and reduce transmission noise.

[0038] In the embodiment, the rotation axis of the rotating member 32 is the predetermined axis O, which can be arranged in a spaced relationship with the substrate 60, so that the diffraction grating 40 mounted on the rotating member 32 can receive the outgoing light. Further, the predetermined axis O can be substantially perpendicular or out-of-plane perpendicular to the light path of the outgoing light, so that when the diffraction grating 40 is arranged on the end surface of the rotating member 32, the diffraction efficiency of the outgoing light is higher. Further, the diffraction grating 40 can be located on the side of the rotating member 32 away from the connecting seat 36, which can be substantially perpendicular to the end surface of the rotating member 32.

[0039] The plane where the diffraction grating 40 is located can be parallel or coincident with the predetermined axis O.

[0040] As an example, when the plane containing the diffraction grating 40 is parallel to the predetermined axis O, the plane containing the diffraction grating 40 will not pass through the predetermined axis O. This allows the diffraction grating 40 to rotate into the area covered by the emitted light during its rotation around the predetermined axis O, thereby receiving the emitted light from the first light source 10. In this example, since the orientation of the diffraction grating 40 does not coincide with the radial direction of the rotating member 32, the position requirement of the first light source 10 can be slightly relaxed. For example, the first light source 10 can be offset from the predetermined axis O, so that the coverage area of ​​the emitted light does not cover the predetermined axis O as much as possible. That is, there is a certain distance between the boundary of the coverage area of ​​the emitted light and the predetermined axis O, so that the emitted light will not illuminate the predetermined axis O. In this way, when the diffraction grating 40 rotates above the first light source 10, the angle between the first light source 10 and the optical path of the emitted light is as large as possible, which can increase the effective incident time of the emitted light on the diffraction grating 40, thereby expanding the area corresponding to the diffraction spot. This improves the diffraction range and efficiency. For example, the position of the first light source 10 can be roughly aligned with the predetermined axis O, that is, the light-emitting surface of the first light source 10 faces the predetermined axis O. At this time, since the plane where the diffraction grating 40 is located does not coincide with the radial direction of the rotating component 32, when the diffraction grating 40 moves above the first light source 10, there is still a certain angle between the first light source 10 and the light path of the emitted light (not an angle of 0 degrees). The emitted light can penetrate the diffraction grating 40 to form a diffraction spot. In this case, the requirements for the assembly accuracy, position accuracy, and dimensional accuracy of the first light source 10 or the diffraction grating 40 are relatively low, which is conducive to improving the efficiency of production assembly.

[0041] As another example, when the plane containing the diffraction grating 40 coincides with the predetermined axis O, the plane containing the diffraction grating 40 passes through the predetermined axis O, and the diffraction grating 40 is arranged approximately along the radial direction of the rotating member 32. In this example, the first light source 10 is offset from the predetermined axis O, so that the coverage area of ​​the emitted light does not cover the predetermined axis O as much as possible. That is, there is a certain distance between the boundary of the coverage area of ​​the emitted light and the predetermined axis O, so that the emitted light will not illuminate the predetermined axis O. In this way, when the diffraction grating 40 rotates above the first light source 10, the angle between the first light source 10 and the optical path of the emitted light is as large as possible, which can increase the effective incident time of the emitted light on the diffraction grating 40, thereby expanding the area corresponding to the diffraction spot and improving the diffraction efficiency. In this embodiment of the application, the number of diffraction gratings 40 on the rotating member 32 can be one or more, to achieve different optical effects.

[0042] As an example, in the case where the rotating member 32 is provided with a diffraction grating 40, when the diffraction grating 40 rotates into the coverage range of the outgoing light, the outgoing light penetrates the diffraction grating 40 and is emitted out. During this period, when the diffraction grating 40 rotates around the predetermined axis O under the driving of the rotating mechanism 30, the incident angle of the outgoing light on the diffraction grating 40 changes, which can be considered to cause the outgoing light to be scanned on the diffraction grating. The incident angle of the outgoing light on the diffraction grating 40 changes, and the outgoing angle of the outgoing light after penetrating the diffraction grating 40 also changes. Therefore, if the diffraction grating 40 is located in the coverage range of the outgoing light during the rotation of the diffraction grating 40, the diffraction spot corresponding to the outgoing light will also linearly move on the projection surface, so that multiple diffraction spots present linear motion on the imaging surface, creating an effect similar to the movement of a meteor shower, enriching the viewing experience of the user. When the diffraction grating 40 continues to rotate until it is completely rotated out of the coverage range of the outgoing light, no diffraction spot will be present on the imaging surface. Under the continuous rotation of the rotating mechanism 30, the diffraction spots on the imaging surface linearly move periodically and without intervals.

[0043] As another example, in order to further enrich the projection light effect, the rotating member 32 of the rotating mechanism 30 can be provided with multiple diffraction gratings 40, as shown in FIG. 2. Figure 5 As shown in FIG. 2, the multiple diffraction gratings 40 are arranged around the predetermined axis O and are sequentially and intervaliy distributed on the outer periphery of the predetermined axis O, wherein each diffraction grating 40 can be perpendicular to the end surface of the rotating member 32, that is, each diffraction grating 40 can be parallel or coincident with the predetermined axis O (approximately coincident in the middle). Figure 5 The multiple diffraction gratings 40 are approximately radially arranged, and the angle (the angle of the planes in which the two diffraction gratings 40 are located) between any two adjacent diffraction gratings 40 is greater than or equal to 100 degrees and less than or equal to 160 degrees, for example, the angle can be 120 degrees. When the first diffraction grating 40 rotates into the coverage range of the outgoing light, the outgoing light penetrates the first diffraction grating 40 and is emitted out; the first diffraction grating 40 continues to rotate, and the diffraction spot corresponding to the outgoing light linearly moves on the imaging surface; when the first diffraction grating 40 rotates out of the coverage range of the outgoing light, the second diffraction grating 40 adjacent to the first diffraction grating 40 just starts to enter the coverage range of the outgoing light, and the diffraction spot corresponding to the outgoing light continues to linearly move on the imaging surface. Therefore, under the continuous rotation of the rotating mechanism 30, the diffraction spots on the imaging surface can linearly move periodically and almost without intervals. In this embodiment, the number of diffraction gratings 40 provided on the rotating member 32 of one rotating mechanism 30 is not limited, for example, the rotating member 32 of one rotating mechanism 30 can be provided with four, six, seven, eight or ten or more diffraction gratings 40, and for example, the number of diffraction gratings 40 provided on the rotating member 32 of one rotating mechanism 30 is greater than or equal to three and less than or equal to eight.

[0044] Specifically in Figure 5 In the embodiment shown, the rotating member 32 of the rotating mechanism 30 is provided with three diffraction gratings 40, which are arranged in a peripheral region around the predetermined axis O and radially from the center, and the angle between any two adjacent diffraction gratings 40 is about 120 degrees. Figure 5 In the embodiment shown, the rotating mechanism 30 rotates clockwise, and when the first diffraction grating 40 enters the coverage range of the outgoing light, the first diffraction grating 40 intersects the light path of the outgoing light, and the outgoing light needs to pass through the first diffraction grating 40 to be emitted; with the rotation of the rotating mechanism 30, the relative angle between the first diffraction grating 40 and the light path of the outgoing light changes, and when the relative angle changes to about 45-50 degrees, the first diffraction grating 40 is out of the coverage range of the outgoing light, and at this time the second diffraction grating 40 enters the coverage range of the outgoing light, ensuring the continuity of the projection light effect. Figure 5 It can be seen that when each diffraction grating 40 rotates in the coverage range of the outgoing light, the relative angle between the diffraction grating 40 and the light path of the outgoing light changes by about 0-50 degrees (for example, 0-45 degrees), which can ensure that the projected diffraction spot is always diverging from the center to the distance.

[0045] Please refer to Figure 6 In some other embodiments, the number of rotating mechanisms 30 can be multiple, and the multiple rotating mechanisms 30 are arranged on the substrate 60 in sequence and at intervals around the predetermined center, and the multiple rotating mechanisms 30 can be distributed at equal intervals. The rotating member 32 of each rotating mechanism 30 is provided with at least one diffraction grating 40, wherein the predetermined center can be a reference geometric center on the substrate 60, so that the quality distribution of the projection imaging device 100 is more uniform, which is beneficial to improve the structural stability. Correspondingly, the number of first light sources 10 can also be multiple. The multiple rotating mechanisms 30 and the multiple first light sources 10 are arranged one by one, for example, each rotating mechanism 30 and the corresponding first light source 10 are arranged oppositely to diffract the outgoing light of the corresponding first light source 10. Therefore, by arranging the multiple rotating mechanisms 30 on the substrate 60 in sequence and at intervals around the predetermined center, for example, the rotating mechanisms 30 can be arranged in a circumferential arrangement, and the light emitted by the diffraction gratings 40 corresponding to the multiple rotating mechanisms 30 can cover the projection area corresponding to the circumference, and the linear movement of the diffraction spot in the projection area corresponding to the circumference after the outgoing light of each first light source 10 is emitted to the diffraction grating 40 of the corresponding rotating mechanism 30 can present the effect of diverging from the center to the periphery or converging from the periphery to the center.

[0046] In this embodiment, there are four first light sources 10 and four rotating mechanisms 30, which are evenly distributed around the periphery of the transmission member 74. Measuring the relative position of each rotating mechanism 30 by its corresponding rotation axis, the angle between the rotation axis of each rotating mechanism 30 and the transmission axis of the adjacent rotating mechanism 30 is considered to be 90 degrees. Therefore, when the transmission member 74 drives the rotating mechanisms 30 to rotate, four sets of star arrays with 90-degree angles to each other will be projected onto the imaging surface. Visually, the star points on the entire projection surface appear to be moving linearly from the inside out, creating a sense of movement.

[0047] Similarly, in other embodiments, when there are three first light sources 10 and three rotating mechanisms 30, the three rotating mechanisms 30 are distributed at equal intervals around the transmission member 74. Measuring the relative positions of the three by the rotation axis corresponding to each rotating mechanism 30, the angle between the rotation axis corresponding to each rotating mechanism 30 and the transmission axis corresponding to the adjacent rotating mechanism 30 can be considered to be 120 degrees. Therefore, in this embodiment, when the transmission member 74 drives the rotating mechanism 30 to rotate, three sets of star arrays with an angle of 120 degrees to each other will be projected onto the imaging surface. Visually, the star points on the entire projection surface are making linear movements radiating outwards, thus creating a sense of movement. By analogy, in other embodiments, the number of first light sources 10 and rotating mechanisms 30 can be two, five, or more.

[0048] Furthermore, in such Figure 6 In the illustrated embodiment, multiple rotating mechanisms 30 are all driven by the same driving mechanism 70. The driving mechanism 70 includes the previously described rotating drive source 72 and a transmission member 74 (worm gear). The transmission member 74 (worm gear) is located at a predetermined center of the substrate 60. Multiple rotating mechanisms 30 are arranged around the transmission member 74 (worm gear) and are roughly circularly arranged around its periphery. The rotating member 32 (gear) of each rotating mechanism 30 meshes with the transmission member 74 (worm gear). When the transmission member 74 (worm gear) rotates, it drives the rotating members 32 (gears) of multiple rotating mechanisms 30 to rotate simultaneously. This allows the linear movement of the diffraction spot in the projection area corresponding to the circumference to exhibit an effect of either diverging from the center outwards or contracting from the periphery towards the center. By simultaneously driving multiple rotating mechanisms 30 with one driving mechanism 70, the structure of the projection imaging device 100 becomes more compact, and the consistency of the diffraction spot's movement rhythm is improved.

[0049] In the above embodiments, the transmission between the drive mechanism 70 and the rotating mechanism 30 is a meshing transmission between a worm gear and a cylindrical gear. In other embodiments, the drive mechanism 70 and the rotating mechanism 30 can also achieve transmission through other structures. For example...Figure 7 In the illustrated embodiment, the transmission member 74 of the driving mechanism 70 comprises a bevel gear structure (or the transmission member 74 itself is a bevel gear), the rotating member 32 of the rotating mechanism 30 also comprises a bevel gear structure (or the rotating member 32 itself is a bevel gear), the rotation axis of the bevel gear of the rotating member 32 is the predetermined axis O, the two bevel gear structures are in mesh transmission with each other, and the diffraction grating 40 is arranged on the end face of the bevel gear of the rotating member 32. When the number of the rotating mechanisms 30 is multiple, for example, two or more, the rotating members 32 of the multiple rotating mechanisms 30 are distributed at different positions on the circumference of the bevel gear of the transmission member 74 and are all in mesh with the bevel gear of the transmission member 74, so that the multiple rotating mechanisms 30 can be synchronously rotated under the driving of one driving mechanism 70.

[0050] In the above-mentioned embodiments provided in the present application, the diffraction grating 40 can be relatively fixedly arranged on the side of the rotating member 32 close to the first light source 10, that is, the diffraction grating 40 is arranged on the end face of the rotating member 32 close to the first light source 10, so that the rotating member 32 drives the diffraction grating 40 to rotate around the predetermined axis O. In the process of rotation, the diffraction grating 40 can be rotated into the coverage range of the emergent light. When the diffraction grating 40 has an overlapping part with the coverage range of the emergent light, the emergent light can always penetrate the diffraction grating 40 to be emitted out until the diffraction grating 40 is rotated to be completely located outside the coverage range of the emergent light. Please refer to Figure 8 When the phenomenon is described by projection along the direction of the emergent light, if the projection A of the diffraction grating 40 and the projection B of the light emitting face of the first light source 10 have an overlapping part in the process of rotation of the diffraction grating 40, the emergent light can certainly penetrate the diffraction grating 40 to be diffracted. In Figure 8In the embodiment shown, the projection A of the diffraction grating 40 and the projection B of the light exit surface of the first light source 10 have an overlapping portion corresponding to a rotation central angle (which can be referred to as an effective central angle a) of about 170 degrees. That is, the diffraction grating 40 remains in the coverage of the exit light for a duration of 170 degrees of rotation, and the exit light keeps penetrating the diffraction grating 40 and diffracting. However, in some practical applications, it is not necessary for a diffraction grating 40 to correspond to such a long diffraction time. Therefore, in some other embodiments of the present application, a translation mechanism is provided to enable the diffraction grating 40 to exit the coverage of the exit light during the rotation within the effective central angle a, so as to obtain the corresponding light effect. For example, the diffraction grating 40 can also be movably arranged on the rotating member 32, and the translation mechanism is provided to drive the diffraction grating 40 to move in the direction of the predetermined axis O, so as to exit or enter the coverage of the exit light during the rotation within the effective central angle a. It should be understood that the "170 degrees of rotation process / effective central angle a" and the related descriptions above are only illustrative examples for the embodiment shown for the purpose of clear description, and should not be regarded as a limitation of the embodiments of the present application. The translation mechanism will be described below in the present specification.

[0051] Referring to Figure 9 In Figure 9 In the embodiment shown, the projection A of the diffraction grating 40 and the projection B of the light exit surface of the first light source 10 have an overlapping portion corresponding to a rotation central angle (which can be referred to as an effective central angle a) of about 170 degrees. That is, the diffraction grating 40 remains in the coverage of the exit light for a duration of 170 degrees of rotation, and the exit light keeps penetrating the diffraction grating 40 and diffracting. However, in some practical applications, it is not necessary for a diffraction grating 40 to correspond to such a long diffraction time. Therefore, in some other embodiments of the present application, a translation mechanism is provided to enable the diffraction grating 40 to exit the coverage of the exit light during the rotation within the effective central angle a, so as to obtain the corresponding light effect. For example, the diffraction grating 40 can also be movably arranged on the rotating member 32, and the translation mechanism is provided to drive the diffraction grating 40 to move in the direction of the predetermined axis O, so as to exit or enter the coverage of the exit light during the rotation within the effective central angle a. It should be understood that the "170 degrees of rotation process / effective central angle a" and the related descriptions above are only illustrative examples for the embodiment shown for the purpose of clear description, and should not be regarded as a limitation of the embodiments of the present application. The translation mechanism will be described below in the present specification.

[0052] As an example, the translation mechanism 90 itself can be provided with a driving source, which is capable of driving the diffraction grating 40 to move by itself. Specifically, the translation mechanism 90 can include a linear drive (not shown in the figure). The linear drive is arranged on the connecting seat 36. The moving direction of the linear drive is the predetermined axis O, which is substantially perpendicular to the light path of the outgoing light, or substantially parallel to the substrate 60. The linear drive can be a linear motor, or a linear motor provided with a speed reducer, or a linear drive device such as a linear cylinder or a telescopic electric push rod. The driving end of the linear drive is rotatably arranged in the rotating member 32, and can be exposed on the side of the rotating member 32 facing the first light source 10. The diffraction grating 40 is mounted on the driving end of the linear drive. When the rotating member 32 rotates the diffraction grating 40, if the diffraction grating 40 is located in the range covered by the outgoing light (for example, the above-mentioned 170-degree central angle range) and does not need to diffract the outgoing light, the translation mechanism 90 drives the diffraction grating 40 to exit the range covered by the outgoing light along the direction of the predetermined axis O during the rotation.

[0053] Referring to Figures 9 to 14 , Figures 9 to 14 A structural schematic diagram of the translation mechanism 90 is shown. In the present embodiment, referring to Figure 9 , and FIG. 110, the translation mechanism 90 includes a guide 93 and an elastic support 94. The guide 93 is arranged between the connecting seat 36 and the rotating member 32. The elastic support 94 is movably arranged in the rotating member 32. The diffraction grating 40 is located on the side of the rotating member 32 away from the guide 93, and is connected to the elastic support 94. The guide 93 is provided with a guide surface 931. The elastic support 94 is in sliding cooperation with the guide surface 931, so that when the elastic support 94 is rotated by the rotating member 32, it slides along the guide surface 931, thereby driving the diffraction grating 40 to move along the direction of the predetermined axis O, so as to enter or exit the range covered by the outgoing light.

[0054] Referring to Figure 11 , in the present embodiment, the guide 93 includes a main body 933 and a guide portion 935. The main body 933 is fixedly arranged on the connecting seat 36. The main body 933 is substantially in the shape of a cylindrical tube, which is arranged between the mounting portion 363 of the connecting seat 36 and the rotating member 32, and surrounds the adapter portion 365. The main body 933 is used to accommodate the elastic support 94. Specifically, the main body 933 is arranged in a spaced-apart manner with the adapter portion 365, and a receiving groove 9331 is formed between the main body 933 and the adapter portion 365, which is used to accommodate the elastic support 94. Further, the receiving groove 9331 penetrates the main body 933 along the direction of the predetermined axis O.

[0055] The guide portion 935 is provided on the main body portion 933 and protrudes relative to the main body portion 933. Specifically, the guide portion 935 is also substantially cylindrical, and is provided on the inner circumferential wall of the main body portion 933 and protrudes relative to the main body portion 933. Specifically, the guide portion 935 protrudes from the inner surface of the main body portion 933 toward the inner cavity of the main body portion 933 (i.e., the position of the predetermined axis O). The guide portion 935 and the main body portion 933 can be integrally formed or assembled, and the present application does not limit the connection structure therebetween.

[0056] The guide surface 931 is located on the side of the guide portion 935 away from the rotating member 32. The guide surface 931 includes a first end 9311 and a second end 9313, and the distance between the first end 9311 and the rotating member 32 is greater than the distance between the second end 9313 and the rotating member 32. Therefore, when the elastic support 94 moves along the guide surface 931, the elastic support 94 can be translated in the direction of the predetermined axis O based on the distance difference between the first end 9311 and the second end 9313. Specifically, in this embodiment, the first end 9311 and the second end 9313 can be two different points on the guide surface 931, for example, when the guide surface 931 is substantially annular, i.e., the guide surface 931 is arranged in a circle along the circumference of the main body portion 933, the first end 9311 and the second end 9313 can be adjacent to each other or connected to each other; for another example, when the guide surface 931 is not a complete annular surface (e.g., half a ring), i.e., the guide surface 931 is arranged less than a circle along the circumference of the main body portion 933, the first end 9311 and the second end 9313 can be located at opposite ends of the guide surface 931, respectively.

[0057] Further, the distance between the guide surface 931 and the rotating member 32 gradually decreases in the direction from the first end 9311 to the second end 9313. In the present embodiment, the guide surface 931 is connected to the inner circumferential wall of the main body portion 933 and extends spirally on the inner circumferential wall. The first end 9311 can be regarded as the starting point of the spirally extending structure, and the second end 9313 can be regarded as the ending point of the spirally extending structure. It can be seen that there is a distance difference between the first end 9311 and the second end 9313 in the direction of the predetermined axis O. Therefore, based on the restriction of the guide surface 931, the elastic support 94 can move in the direction of the predetermined axis O. Taking the direction in the figure as an example, when the elastic support 94 rotates around the predetermined axis O in the direction of the arrow C, the elastic support 94 gradually approaches the first end 9311 from the second end 9313, and is in a gradually retracted process relative to the rotating member 32. Specifically, when the elastic support 94 rotates to contact the first end 9311, the diffraction grating 40 is in a retracted state relative to the rotating member 32, and does not overlap with the coverage range of the emergent light; the elastic support 94 continues to rotate, and falls from the first end 9311 to the second end 9313, that is, the elastic support 94 contacts the second end 9313, at this time, the diffraction grating 40 is in an extended state relative to the rotating member 32, and has an overlapping part with the coverage range of the emergent light.

[0058] In Figure 11In the shown embodiment, there is a clear boundary between the first end 9311 and the second end 9313, i.e. the distance between the first end 9311 and the second end 9313 in the direction of the predetermined axis O is relatively large (may be considered as one pitch unit), at this time the guide portion 935 can further comprise a connecting surface 9351 connected between the first end 9311 and the second end 9313. When the inclination angle of the connecting surface 9351 relative to the guide surface 931 at the first end 9311, or the inclination angle of the connecting surface 9351 relative to the guide surface 931 at the second end 9313 is limited within a certain range, for example, the inclination angle is less than or equal to 60 degrees and greater than or equal to 30 degrees, the elastic support 94 can move from the second end 9313 to the first end 9311 along the connecting surface 9351 (at this time the elastic support 94 rotates in the direction of the arrow D in the figure). The inclination angle can be considered as the slope of the connecting surface 9351 relative to the second end 9313 of the guide surface 931, or can be considered as the slope of the connecting surface 9351 relative to the first end 9311 of the guide surface 931. With the predetermined axis O as a reference, the inclination angle is represented by the included angle between the connecting surface 9351 and the predetermined axis O, when the included angle between the plane where the connecting surface 9351 is located and the predetermined axis O is greater than or equal to 40 degrees, the elastic support 94 can move from the second end 9313 to the first end 9311 along the connecting surface 9351. In particular, in the present embodiment, the included angle between the plane where the connecting surface 9351 is located and the predetermined axis O is less than or equal to 30 degrees (for example, 0 degree), at this time, there is a distance difference between the first end 9311 and the second end 9313 to form a stepped structure, at this time, the elastic support 94 cannot move from the second end 9313 to the first end 9311 along the connecting surface 9351, but is limited to move from the first end 9311 to the second end 9313 along the connecting surface 9351, i.e. the rotation direction of the elastic support 94 is limited to rotate in the direction of the arrow C in the figure, which is beneficial to realize the light effect of one-way linear movement. Of course, in other embodiments, the first end 9311 and the second end 9313 can be smoothly transitioned through the connecting surface 9351, for example, the connecting surface 9351 is a smooth slope structure, so that the rotation direction of the elastic support 94 can be rotated in either of the two directions according to the needs, thereby realizing the required linear light effect.

[0059] Please refer to Figure 10 and Figure 12 In the present embodiment, the rotating member 32 is provided with a sliding groove 323 penetrating through opposite sides of the rotating member 32 along the predetermined axis, and the sliding groove 323 is used for slidably penetrating the elastic support 94. Further, the elastic support 94 comprises a supporting member 941, a mounting member 943 and an elastic member 945.

[0060] One end of the mounting member 943 is movably arranged in the rotating member 32 and located on the side of the rotating member 32 away from the guide member 93, and the other end is located on the side of the guide surface 931 away from the rotating member 32. Specifically, the mounting member 943 includes a mounting portion 9431 and a sliding fitting portion 9433 connected to each other, the mounting portion 9431 is movably arranged in the sliding groove 323, and the diffraction grating 40 is mounted on the mounting portion 9431. The sliding fitting portion 9433 is arranged at the end of the mounting portion 9431 away from the diffraction grating 40, and the sliding fitting portion 9433 is substantially in a columnar structure and extends substantially perpendicular to the direction of the predetermined axis O, and is used to contact and achieve sliding fit with the guide surface 931. Further, in some embodiments, the side of the sliding fitting portion 9433 facing the guide surface 931 can be provided with a roller, which changes the sliding friction of the contact into rolling friction, which is beneficial to improve the smoothness of the movement of the elastic support 94 and reduce the movement noise.

[0061] The support member 941 is connected to the end of the sliding fitting portion 9433 away from the mounting portion 9431, and is used to mount the elastic member 945. In the present embodiment, the support member 941 includes a limiting portion 9411 and a support portion 9413 connected between the limiting portion 9411 and the mounting member 943. Further, the support portion 9413 is substantially in a columnar structure and extends along the predetermined axis O, and is used to mount the elastic member 945. The radial dimension of the limiting portion 9411 is greater than that of the support portion 9413, so as to limit the elastic member 945 on the support portion 9413.

[0062] The elastic member 945 is movably sleeved outside the support portion 9413 and elastically abuts between the mounting member 943 and the support member 941, so as to make the mounting member 943 contact the guide surface 931. It should be understood that, in the present specification, “a certain element elastically abuts against another element” should be understood as that the certain element abuts against the other element by using elastic potential energy, and the two elements can be directly in contact or indirectly abut (for example, when there is a centering element between the two elements, the other element is mounted on the centering element, and the certain element can elastically abut against the centering element, so as to “elastically abut against the other element”. In the present embodiment, the specific type of the elastic member 945 should not be limited, which has the ability of elastic deformation, for example, the elastic member 945 can be a spring, a spring piece, or an elastic sleeve.

[0063] Further, in the embodiment, the translation mechanism 90 further comprises a rotating seat 95 movably arranged in the receiving groove 9331 of the guide 93, and the rotating seat 95 is used for mounting the elastic support 94. In the embodiment, the rotating seat 95 is provided with a guide groove 951, the guide groove 951 is in opposite communication with the sliding groove 323, and the elastic support 94 is slidably arranged in the guide groove 951 and the sliding groove 323. Through the limiting and guiding effect of the cooperation between the sliding groove 323 and the guide groove 951, the sliding of the elastic support 94 is more stable and reliable.

[0064] Specifically, referring to Figure 13 and Figure 14 , the rotating seat 95 comprises a bottom plate 953 and a plurality of guide plates 955. The bottom plate 953 is rotatably arranged in the receiving groove 9331 and located between the guide surface 931 and the connecting seat 36. The guide plates 955 are arranged on the side of the bottom plate 953 facing the rotating member 32, and the plurality of guide plates 955 are sequentially and spaced arranged around the predetermined axis O, and the guide groove 951 is formed between any two adjacent guide plates 955. The mounting member 943 is movably limited in the corresponding guide groove 951, and the sliding fitting part 9433 of the mounting member 943 is arranged opposite to the guide surface 931. The supporting part 9413 of the supporting member 941 is movably arranged in the bottom plate 953 and connected to the mounting member 943, and the limiting part 9411 of the supporting member 941 is located on the side of the bottom plate 953 away from the guide surface 931, which can be fixed on the bottom plate 953 to limit the mounting position of the elastic support 94. The elastic member 945 is located between the bottom plate 953 and the guide surface 931 and elastically abuts between the bottom plate 953 and the sliding fitting part 9433 of the mounting member 943. Under the elastic abutting effect of the elastic member 945, the elastic support 94 can always keep in contact with the guide surface 931 when rotating around the predetermined axis O, so as to realize the expansion and contraction movement of the diffraction grating 40.

[0065] In the embodiment, the rotating member 32 of the rotating mechanism 30 can be provided with a plurality of diffraction gratings 40, and the translation mechanism 90 can also be provided with a plurality of elastic supports 94, and the plurality of elastic supports 94 and the plurality of diffraction gratings 40 are arranged one by one. The translation mechanism 90 can control the diffraction grating 40 entering the coverage range of the outgoing light through the guide surface 931, and there is not two or more diffraction gratings 40 in the coverage range of the outgoing light at the same time, so as to avoid the diffraction spots being messy, thereby obtaining a more pure linear movement light effect. For example, by reasonably setting the distance between each part of the guide surface 931 and the rotating member 32, the above-mentioned effect can be obtained, which will not be described here.

[0066] In the above embodiment, the translation mechanism 90 drives the diffraction grating 40 to translate along the predetermined axis O through the sliding fit structure between the elastic support 94 and the guide 93. It should be understood that in other embodiments of the present application, the translation mechanism 90 can also be implemented in other forms. For example, the translation mechanism 90 can not have the structure of the guide 93 described above, but can include a linear drive (not shown in the figure) arranged on the connecting seat 36 and a support (not shown in the figure) connected between the linear drive and the diffraction grating 40. The support can be driven by the linear drive to translate along the direction of the predetermined axis O, so that the diffraction grating 40 is driven by the translation mechanism 90 to enter or exit the coverage range of the emergent light along the direction of the predetermined axis O. The support in the present embodiment can have the structure of the elastic support 94 provided in any one of the above embodiments, or can be changed on the basis of the structure of the elastic support 94 provided in any one of the above embodiments (for example, the elastic member 945 in the elastic support 94 is omitted), and the present specification will not be described here. The linear drive in the present embodiment can be implemented by using a linear motor, a linear cylinder or other linear driving source. The number of the linear drive and the support in the present embodiment can be multiple, and they are arranged in one-to-one correspondence with the multiple diffraction gratings 40.

[0067] Please refer again to Figure 2In some embodiments, the projection imaging device 100 can further include a second light source 80 disposed inside the housing 50, and light rays of the second light source 80 can be emitted through the light exit port 521. Specifically, the second light source 80 can be a projection module provided with a light modulator, which is configured to project a specified image, for example, a starry sky background image. Thus, the falling meteor shower effect or the converging and diverging effect of the star points created by the diffraction grating 40 can be superimposed and displayed with the starry sky background image, so that the whole picture has more levels and atmosphere, and the user's viewing experience is enriched. In the present embodiment, the second light source 80 can be fixedly disposed inside the housing 50, or the second light source 80 can be movably disposed inside the housing 50, so that the image corresponding to the second light source 80 can also move on the imaging surface, which can further improve the atmosphere of the projection picture. For example, the second light source 80 can be directly connected to the transmission member 74, for example, mounted at the end of the transmission member 74, and rotate with the transmission member 74, so that the rotation of the background image can be realized without adding an additional driving mechanism, which is different from the linear motion caused by the diffraction grating 40, so that the whole picture has more levels and atmosphere, and the user's viewing experience is further enriched. In other embodiments, the light rays of the first light source 10 and the second light source 80 can be emitted through the same light exit port, or can be emitted through different light exit ports. For example, the housing 50 can be provided with two or more light exit ports 521, and the light rays of the first light source 10 and the second light source 80 can be emitted through one light exit port 521 respectively, so that the projection imaging device 100 can form different light effects in different areas to meet the diversified projection needs of users.

[0068] Referring to Figure 15 The present application also provides a lamp 200, which includes a circuit board 210 and the above-mentioned projection imaging device 100. The circuit board 210 can be fixedly disposed on the substrate 60, and the projection imaging device 100 is electrically connected to the circuit board 210.

[0069] In some embodiments, the circuit board 210 can include a control module, which can be a control chip. In one aspect, the control module is electrically connected to the rotating mechanism 30 or / and the driving mechanism 70, and is configured to control the rotating speed of the rotating mechanism 30. In another aspect, the first light source 10 can be a tunable wide-spectrum laser generator, and the control module is electrically connected to the wide-spectrum laser generator and is configured to control the wide-spectrum laser generator to generate laser beams of a specified wavelength.

[0070] In some embodiments, the circuit board 210 can further include a power supply module, which is connected to the first light source 10, the rotating mechanism 30 and the second light source 80 respectively, and is configured to provide electric energy for the first light source 10, the rotating mechanism 30 and the second light source 80.

[0071] The application provides a projection imaging device and a lamp. In the projection imaging device, the emergent light generated by a first light source is emitted to a diffraction grating, so that the light rays emitted through the diffraction grating carry a plurality of diffraction spots, and an image containing a plurality of star points (i.e., diffraction spots) can be formed when imaging on a projection surface. In addition, the projection imaging device is also provided with a rotating mechanism connected to the diffraction grating. The diffraction grating rotates under the driving of the rotating mechanism, so that the emergent light is swept on the diffraction grating, the incidence angle of the emergent light on the diffraction grating changes, and the emergent angle of the emergent light after transmitting the diffraction grating also changes. In the process of rotating the diffraction grating, the diffraction spot corresponding to the emergent light also moves linearly on the projection surface, so that the plurality of star points presents linear motion on the imaging surface, creating an effect similar to the movement of a meteor, and enriching the viewing experience of the user.

[0072] In actual application, the number of the above elements is not limited. When the diffraction grating and the corresponding rotating mechanism and the first light source are provided with a plurality of elements, the emergent light is emitted through a plurality of diffraction gratings to form a plurality of light spots or star points on the projection surface, and the linear movement rule of the plurality of light spots or star points is related to the arrangement of the rotating mechanism. For example, when the plurality of rotating mechanisms are arranged in a circle, the linear movement rule of the plurality of light spots or star points can present an effect of diverging from the center to the periphery or shrinking from the periphery to the center. For another example, when the plurality of rotating mechanisms are arranged in an array, the linear movement rule of the plurality of light spots or star points can present an effect of array movement, similar to the effect of meteor shower falling. Therefore, the projection imaging device and the lamp provided by the application embodiment can realize a plurality of imaging effects, and can enrich the viewing experience of the user.

[0073] In the present application, some terms are used to refer to specific components in the specification and claims. Those skilled in the art should understand that the same components can be referred to by different names by hardware manufacturers. The specification and claims do not distinguish components by name difference, but by functional difference. As mentioned throughout the specification and claims, "including" is an open term, which should be interpreted as "including but not limited to"; "approximately" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0074] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inside" and the like indicate the orientation or positional relationship shown in the drawings, and are only simplified for the purpose of describing the present application, and do not indicate or imply that the devices or elements 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.

[0075] In this application, unless otherwise clearly specified or limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly. For example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal connection of two elements, or only surface contact. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0077] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection imaging device, characterized in that, include: A first light source is used to generate outgoing light. The first light source is a laser generator, and the outgoing light is a laser with a defined optical path. A rotating mechanism is positioned at an interval from the first light source; A diffraction grating is disposed on the rotating mechanism and can rotate around a predetermined axis under the drive of the rotating mechanism to the optical path of the emitted light, so that the emitted light can exit through the diffraction grating; wherein, the predetermined axis is not parallel to the optical path of the emitted light; during the rotation of the diffraction grating driven by the rotating mechanism, the incident angle of the emitted light on the diffraction grating changes, and the exit angle of the emitted light after passing through the diffraction grating changes accordingly; and A translation mechanism is provided, and the diffraction grating is also connected to the translation mechanism. Driven by the translation mechanism, the diffraction grating enters or exits the coverage area of ​​the emitted light along the direction of the predetermined axis. The light transmitted through the diffraction grating forms a diffraction spot on a designated imaging surface. During the rotation of the rotation mechanism, the diffraction spot moves linearly on the imaging surface.

2. The projection imaging device according to claim 1, characterized in that, The optical path of the emitted light is perpendicular to the predetermined axis or perpendicular to the opposite plane.

3. The projection imaging device according to claim 1, characterized in that, The rotating mechanism is provided with a plurality of diffraction gratings, which are arranged around the predetermined axis and distributed at intervals in sequence.

4. The projection imaging device according to claim 3, characterized in that, The plane containing the diffraction grating is parallel to or coincides with the predetermined axis.

5. The projection imaging device according to claim 1, characterized in that, The rotating mechanism includes a connecting seat and a rotating component, the rotating component being rotatably disposed on the connecting seat; the translation mechanism is disposed between the connecting seat and the rotating component, the diffraction grating is mounted on the translation mechanism and movably disposed on the rotating component through the translation mechanism; the rotating component is used to drive the translation mechanism and the diffraction grating to rotate around the predetermined axis, and the translation mechanism drives the diffraction grating to move along the direction of the predetermined axis when rotating.

6. The projection imaging device according to claim 5, characterized in that, The translation mechanism includes a guide and an elastic bracket. The elastic bracket is movably inserted through the rotating member. The guide is disposed between the connecting seat and the rotating member. The diffraction grating is located on the side of the rotating member opposite to the guide and is connected to the elastic bracket. The guide member has a guide surface, and the elastic bracket slides in cooperation with the guide surface, so that when the elastic bracket rotates under the drive of the rotating member, it slides along the guide surface, thereby driving the diffraction grating to move along the predetermined axis.

7. The projection imaging device according to claim 6, characterized in that, The guide member includes a main body and a guide portion. The main body is fixedly disposed on the connecting seat, and the guide portion is disposed on the main body and protrudes relative to the main body. The guide surface is located on the side of the guide portion away from the rotating member. The guide surface includes a first end and a second end. The distance between the first end and the rotating member is greater than the distance between the second end and the rotating member.

8. The projection imaging device according to claim 7, characterized in that, The main body is provided with a receiving groove, which penetrates the main body along the predetermined axis; the guide part is provided on the inner peripheral wall of the main body, the guide surface is connected to the inner peripheral wall and extends spirally on the inner peripheral wall.

9. The projection imaging device according to claim 7, characterized in that, The elastic support includes a support member, a mounting member, and an elastic member. One end of the mounting member is movably inserted through the rotating member and located on the side of the rotating member opposite to the guide member, and the other end is located on the side of the guide surface opposite to the rotating member. The support member is connected to the mounting member, and the elastic member elastically abuts between the mounting member and the support member, so that the mounting member contacts the guide surface.

10. The projection imaging device according to claim 6, characterized in that, The rotating component is provided with a sliding groove, which passes through opposite sides of the rotating component along the predetermined axis; The translation mechanism further includes a rotating seat, which is movably disposed within the guide member. The rotating seat is provided with a guide groove, which is in communication with the slide groove. The elastic bracket is slidably disposed through the guide groove and the slide groove.

11. The projection imaging device according to claim 1, characterized in that, The projection imaging device further includes a substrate, and the first light source is fixedly disposed on the substrate; the rotating mechanism includes a rotating member, which is rotatably disposed on the substrate, and the diffraction grating is mounted on the rotating member.

12. The projection imaging apparatus according to claim 11, characterized in that, The rotating mechanism further includes a rotating drive component, which is disposed on the substrate. The rotating component is connected to the output end of the rotating drive component and rotates around the predetermined axis under the drive of the rotating drive component.

13. The projection imaging device according to claim 11, characterized in that, The projection imaging device further includes a rotation drive source and a transmission component, wherein the rotation drive source is mounted on the substrate. The rotating component is connected to the rotation drive source via the transmission component, so as to rotate around the predetermined axis under the drive of the rotation drive source; the diffraction grating is disposed on the rotating component.

14. The projection imaging device according to claim 13, characterized in that, The transmission component is a worm gear, the rotating component is a cylindrical gear, the cylindrical gear meshes with the worm gear, and the diffraction grating is disposed on the end face of the gear; or The transmission component includes a bevel gear structure, the rotating component includes a bevel gear structure, the bevel gears of the rotating component and the bevel gear structure of the transmission component mesh with each other, and the diffraction grating is disposed on the end face of the rotating component.

15. The projection imaging apparatus according to claim 14, characterized in that, The rotary drive source and the rotary mechanism are located on opposite sides of the substrate, and the transmission component passes through the substrate and meshes with the rotating component.

16. The projection imaging apparatus according to any one of claims 1 to 15, characterized in that, The number of the rotating mechanism and the first light source are both multiple. The multiple rotating mechanisms are arranged sequentially and at intervals around a predetermined center on the substrate. Each rotating mechanism is provided with at least one diffraction grating. Multiple rotating mechanisms and multiple first light sources are arranged in a one-to-one correspondence, and the emitted light from each first light source is emitted onto the diffraction grating on the corresponding rotating mechanism.

17. The projection imaging apparatus according to any one of claims 1 to 15, characterized in that, The projection imaging device further includes a housing and a second light source. The first light source, the diffraction grating, and the rotation mechanism are all disposed within the housing. The housing has a light outlet, which is located on the optical path of the light emitted through the diffraction grating. The second light source is disposed within the housing, and the light emitted from the second light source is emitted through the light outlet.

18. A lamp, characterized in that, include: Circuit board; as well as The projection imaging device according to any one of claims 1 to 17, wherein the projection imaging device is electrically connected to the circuit board.

Images