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 reflecting element, a rotating mechanism and a diffraction grating. The first light source is used for generating incident light. The reflecting element is fixedly arranged on a light path of the incident light and is used for reflecting the incident light to form 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 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. When the diffraction grating rotates around a predetermined axis under the driving of the rotating mechanism, the incident angle of the outgoing light on the diffraction grating changes. Due to the change of the relative angle between the diffraction grating and the outgoing light when the diffraction grating rotates under the driving of the rotating mechanism, the outgoing light is scanned on the diffraction grating, so that the light spot formed through the diffraction grating presents linear motion on an imaging surface, and the viewing experience of a user is enriched.

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 when presenting a starry sky image. Or, on the basis of the above technical solution, a grating sheet is fixed at the laser emitting port, and the effect of irregular rotation of part of the star points (i.e., light spots) is realized on the basis of the overall rotation of the starry sky by irradiating two grating sheets.

[0003] Since the rotatable grating sheet is adopted in the above technical solution, only the rotating movement of the light spot can be realized, and other dynamics of the light spot cannot be realized, 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 embodiments of the present application provide a projection imaging device, which comprises a first light source, a reflecting member, a rotating mechanism and a diffraction grating. The first light source is used to generate incident light. The reflecting member is fixedly arranged on an optical path of the incident light, and is used to reflect the incident light to form 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 rotate to the optical path of the outgoing light under the driving of the rotating mechanism, so that the outgoing light can be emitted through the diffraction grating. When the diffraction grating rotates around a predetermined axis under the driving of the rotating mechanism, the incident angle of the outgoing light on the diffraction grating changes.

[0006] The light emitted by the grating is on the optical path of the light. The second light source is arranged in the housing, and the light of the second light source is emitted through the light outlet.

[0007] According to a second aspect of the present application, the embodiments of the present application provide 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.

[0008] The application provides a projection imaging device and a lamp. In the projection imaging device, the incident light generated by a first light source is reflected to a diffraction grating by a reflecting element, so that the light rays emitted via 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 emitted light is scanned on the diffraction grating, the incident angle of the emitted light on the diffraction grating changes, and the emission angle of the emitted light after transmitting the diffraction grating also changes. In the process of rotating the diffraction grating, the diffraction spot corresponding to the emitted 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.

[0009] In actual application, the number of the above elements is not limited. When the diffraction grating and the corresponding rotating mechanism, reflecting element and first light source are all provided with a plurality of elements, the emitted light is emitted via 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 the 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 the 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 various imaging effects, and can enrich the viewing experience of the user. BRIEF DESCRIPTION OF DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0011] Figure 1 is a structural schematic diagram of the projection imaging device provided by the application embodiment.

[0012] Figure 2 is another structural schematic diagram of the projection imaging device provided by the application embodiment.

[0013] Figure 3 is Figure 1 is a schematic diagram of the projection imaging device omitting the substrate and the driving mechanism in

[0014] Figure 4 isFigure 3 A perspective exploded schematic view of the projection imaging device.

[0015] Figure 5 is Figure 4 A schematic view of the driving mechanism, diffraction grating and reflecting element of the projection imaging device.

[0016] Figure 6 is Figure 5 A front projection schematic view of the driving mechanism, diffraction grating and reflecting element in an assembled state.

[0017] Figure 7 is another schematic view of the projection imaging device provided by the embodiments of the present application.

[0018] Figure 8 is Figure 7 A perspective exploded schematic view of the projection imaging device.

[0019] Figure 9 is a schematic view of a variant structure of the rotating mechanism and driving mechanism of the projection imaging device provided by the embodiments of the present application.

[0020] Figure 10 is a schematic view of the structure of the lamp provided by the embodiments of the present application. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the personnel in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figure 1 and Figure 2 The embodiments of the present application provide 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, such as a ground surface, a wall surface, a ceiling surface and the like. According to the different specified patterns, the projection lamp can include a LOGO projection lamp, an advertisement projection lamp, a starry sky projection lamp and the like.

[0023] In the embodiment of the present application, the projection imaging device 100 comprises a first light source 10, a reflecting member 20, a rotating mechanism 30 and a diffraction grating 40. The first light source 10 is configured to generate incident light. The reflecting member 20 is fixedly arranged on the light path of the incident light, and is configured to reflect the incident light to form outgoing light. The rotating mechanism 30 is arranged apart from the first light source 10, and the diffraction grating 40 is arranged on the rotating mechanism 30 and can rotate to the light path of the outgoing light under the driving of the rotating mechanism 30, 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. During the rotation of the diffraction grating 40, the diffraction spot corresponding to the outgoing light also moves linearly on the projection surface, so that the plurality of diffraction spots present linear motion on the imaging surface, creating an effect similar to the movement of meteor shower, and enriching the viewing experience of the user.

[0024] The diffraction grating 40 provided in the embodiment of the present application is an optical element in which the amplitude or / and phase of light is periodically spatially modulated by a regular structure. According to the spot shape formed by the light transmitting 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 starry sky diffraction grating, etc.

[0025] Please refer to Figure 2 In some embodiments, the projection imaging device 100 further comprises a housing 50, and the housing 50 has an accommodation space 52 arranged inside, which is configured to accommodate the first light source 10, the reflecting member 20, the rotating mechanism 30 and the diffraction grating 40, so as to protect and accommodate these components or parts. In some embodiments, the housing 50 is provided with a light outlet 521, which is connected to the accommodation space 52 and the outside, and is configured to allow the outgoing light to be emitted from the inside of the housing 50 to the outside, i.e., the light outlet 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 the imaging surface (e.g., a wall surface) through the light outlet 521 of the housing 50.

[0026] 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 spaced apart from the light exit opening 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 the form of a flat plate, and comprises a first mounting surface 62 and a second mounting surface 64 which are opposite to each other, the first mounting surface 62 faces the light exit opening 521, and the second mounting surface 64 faces the 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.

[0027] In the present embodiment, the first light source 10 is fixed in the interior of the housing 50, for example, it can be fixed on the first mounting surface 62 of the base plate 60 by means of threaded fasteners or the like. The first light source 10 can be a laser generator, that is, the incident light is 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.

[0028] Please refer to Figure 3 In the present embodiment, the first light source 10 can comprise a mounting seat 12 and a light emitter 14. The mounting seat 12 is fixedly connected to the base plate 60 and is used to mount the light emitter 14 so as to protect the light emitter 14 and avoid the light emitter 14 from shaking. As an example, the mounting seat 12 comprises a first connecting portion 121, a first mounting portion 123 and a receiving portion 125, the first connecting portion 121 is connected to the first mounting surface 62 of the base plate 60 by means of screws or other fasteners, the first mounting portion 123 is connected to the first connecting portion 121 and protrudes relative to the first connecting portion 121. Specifically, the first mounting portion 123 can be substantially in the form of a plate and is substantially perpendicular to the base plate 60. The receiving portion 125 is arranged at one end of the first mounting portion 123 away from the first connecting portion 121 and protrudes relative to the first mounting portion 123. The receiving portion 125, the first mounting portion 123 and the first connecting portion 121 can be integrally formed or assembled.

[0029] Further, the receiving portion 125 can be provided with a receiving groove (not shown in the figure) for accommodating the light emitter 14 to define the specific position of the light emitter 14, and by providing the receiving groove, the light emitter 14 can be conveniently positioned and disassembled. As an example, the receiving groove penetrates through the side of the receiving portion 125 away from the first mounting portion 123 along the predetermined axis O, when the light emitter 14 is arranged in the receiving groove, the light emitting surface of the light emitter 14 faces the outside of the receiving groove, and the optical path of the incident light generated by the light emitter 14 is substantially consistent with the predetermined axis O, for example, the optical path of the incident light is substantially parallel to the predetermined axis O. Specifically, the light emitter 14 can be a single-wavelength laser generator, for example, the light emitter 14 is a green laser generator with a wavelength of 532 nm. The light emitter 14 can also be a tunable broadband laser generator, which can generate and emit laser light of a specified wavelength.

[0030] The reflecting member 20 is arranged on the optical path of the incident light generated by the light emitter 14 for reflecting the incident light to the diffraction grating 40 to form the outgoing light. Specifically, the reflecting member 20 can be located on the predetermined axis O, and the reflecting surface of the reflecting member 20 faces the light emitting surface of the light emitter 14. For example, the center of the reflecting member 20 substantially coincides with the predetermined axis O, or the predetermined axis O passes through the reflecting surface of the reflecting member 20. Specifically, the reflecting member 20 can be an optical element with light reflection function (for example, a plane mirror, a reflecting prism, a beam splitting prism, a spherical mirror, etc.). In the present embodiment, the reflecting member 20 is fixedly arranged in the housing 50, and the specific structure of the fixation is not limited in the present application, for example, it can be mounted on the substrate 60 by a fixed support, or directly fixed on the substrate 60 by fasteners or adhesives.

[0031] The rotating mechanism 30 is mounted on the substrate 60 and arranged opposite to the first light source 10. The rotating mechanism 30 is used to drive the diffraction grating 40 to rotate around the predetermined axis O to form a linearly moving light effect. In the embodiments of the present application, the specific implementation form of the rotating mechanism 30 should not be limited.

[0032] As an example, the rotating mechanism 30 itself can be provided with a driving source, which can be driven to rotate by itself. Specifically, the rotating mechanism 30 can include a rotating driving member (not shown in the figure) and a rotating member 32. The rotating driving member is arranged on the first mounting surface 62 of the base plate 60, and the axis of the driving shaft of the rotating driving member is the predetermined axis O. The rotating driving member can be a rotating motor, or can be a rotating motor provided with a speed reducer, or can be a rotating driving device such as a rotating rudder.

[0033] As another example, referring again to Figure 1 , the 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 present embodiment, the projection imaging device 100 can further include a driving mechanism 70 mounted on the base plate 60. The driving mechanism 70 includes a rotating driving source 72 and a transmission member 74. The rotating driving source 72 is mounted on the base plate 60, for example, it can be mounted on the side of the base plate 60 away from the light outlet 521, that is, it is mounted on the second mounting surface 64 of the base plate 60, so that the rotating mechanism 30 or the first light source 10 is respectively located on the opposite sides of the base plate 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 can be a rotating motor provided with a speed reducer, or can be a rotating driving device such as a rotating rudder.

[0034] In the present embodiment, the rotating mechanism 30 includes a rotating disc 34, which is rotatably arranged on the first mounting surface 62 of the base plate 60 and connected to the driving end of the rotating driving source 72 through the transmission member 74, so as to be driven by the rotating driving source 72 to rotate around the predetermined axis O. At this time, the rotating axis of the rotating disc 34 is the predetermined axis O. Specifically, the transmission member 74 is movably arranged through the base plate 60 and in transmission connection with the rotating disc 34. In the present embodiment, the rotating disc 34 is a gear, the transmission member 74 is a worm, the gear is engaged with the worm, and the diffraction grating 40 is arranged on the end surface of the gear facing the first light source 10. Specifically, the base plate 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 engage with the gear. In the present embodiment, the gear can be a cylindrical gear structure, such as a helical cylindrical gear, an arc tooth cylindrical gear, etc., so as to engage with the worm and reduce transmission noise.

[0035] Further, in order to improve the installation reliability of the rotating disc 34, in the present embodiment, the rotating mechanism 30 can further comprise a connecting seat 36 for mounting the rotating disc 34, the connecting seat 36 is fixedly arranged on the base plate 60, and the rotating disc 34 (gear) or the rotating member 32 is rotatably arranged on the connecting seat 36. Please refer to Figure 4 and Figure 5 As an example, the connecting seat 36 can comprise a second connecting portion 361, a second mounting portion 363 and a fixing portion 365, the second connecting portion 361 is connected to the first mounting surface 62 of the base plate 60 by means of a fastener such as a screw, the second mounting portion 363 is connected to the second connecting portion 361 and is bent and protruded relative to the second connecting portion 361. Specifically, the second mounting portion 363 can be substantially plate-shaped, which is substantially perpendicular to the base plate 60. The fixing portion 365 is arranged at one end of the second mounting portion 363 away from the second connecting portion 361 and protrudes relative to the second mounting portion 363. The fixing portion 365 is located on the side of the second mounting portion 363 facing the first light source 10, and the fixing portion 365, the second mounting portion 363 and the second connecting portion 361 can be an integrally formed structure or an assembled connection structure. The fixing portion 365 is used for mounting the rotating disc 34 (gear) or the rotating member 32, and can also be used for mounting the reflecting member 20. Specifically, the rotating center of the rotating disc 34 (gear) or the rotating member 32 can be provided with a receiving hole 341, and the reflecting member 20 is arranged through the receiving hole 341 and fixedly connected with the connecting seat 36.

[0036] Further, in the present embodiment, the fixing portion 365 is provided with a fixing hole 3651, the fixing hole 3651 and the receiving hole 341 are arranged substantially coaxially, the reflecting member 20 comprises a penetrating portion 22 and a reflecting portion 24 connected to the penetrating portion 22, the penetrating portion 22 is substantially columnar, arranged through the receiving hole 341, and one end of the penetrating portion 22 is fixedly accommodated in the fixing hole 3651, so that the reflecting member 20 is fixedly arranged relative to the connecting seat 36. In the present embodiment, the penetrating portion 22 and the fixing hole 3651 can be connected by a hole shaft cooperation to achieve a rotation-stopping connection to be relatively fixed, for example, the penetrating portion 22 is a non-circular shaft (such as a prismatic shaft, etc.), the fixing hole 3651 is a non-circular hole (such as a polygonal hole, etc.), or the penetrating portion 22 and the fixing hole 3651 can be connected by a key connection structure to achieve a rotation-stopping connection to be relatively fixed. It should be understood that the structure of the connecting seat 36 provided in the present embodiment can be applied to the scheme of "the rotating mechanism 30 is driven by the special driving mechanism 70", and can also be applied to the above-mentioned other embodiments, for example, applied to the scheme of "the rotating mechanism 30 itself can have a driving source", so that the rotating member 32 is rotatably connected to the connecting seat 36, and the reflecting member 20 is fixedly arranged on the connecting seat 36, and the present specification will not be repeated.

[0037] The reflecting part 24 is fixedly connected to the penetrating part 22 at the end away from the connecting base 36, and the reflecting part 24 is provided with a reflecting surface 241 for reflecting the incident light to the diffraction grating 40. The reflecting surface 241 can be integrated in the reflecting part 24, for example, the reflecting part 24 can be a prism structure or a mirror structure, or the reflecting surface 241 can be assembled on the surface of the reflecting part 24, for example, the reflecting surface 241 is the surface of a plane mirror which can be fixed on the reflecting part 24 at the side facing the first light source 10. In the embodiment, the angle between the reflecting surface 241 and the predetermined axis O is greater than or equal to 15 degrees and less than or equal to 75 degrees, for example, the angle between the reflecting surface 241 and the predetermined axis O is 45 degrees, so that the emergent light emitted from the reflecting surface 241 can be incident into the diffraction grating 40 at a suitable angle.

[0038] In order to improve the diffraction efficiency of the emergent light, the plane where the diffraction grating 40 is located does not coincide with the predetermined axis O, that is, the plane where the diffraction grating 40 is located does not pass through the predetermined axis O, so that the diffraction grating 40 can receive the emergent light emitted from the reflecting surface 241 during rotation around the predetermined axis O. In the embodiment, the diffraction grating 40 is arranged on the rotating disc 34 or the rotating member 32, and the rotating disc 34 or the rotating member 32 is rotatably sleeved outside the penetrating part 22 through the accommodating hole 341 and is located between the connecting base 36 and the reflecting part 24, so that the diffraction grating 40 is located on the light path of the light emitted from the reflecting part 24. Please refer to Figure 6 The azimuth angle of the diffraction grating 40 is measured by the revolution circle track of the diffraction grating 40, which can be considered as the revolution circle track of the rotating disc 34 or the rotating member 32, and the plane where the diffraction grating 40 is located does not coincide with any diameter of the revolution circle track, so that the diffraction efficiency of the emergent light is higher when one of the diffraction gratings 40 rotates into the coverage range of the emergent light. In the embodiment, the number of the diffraction gratings 40 on the rotating disc 34 or the rotating member 32 can be one or more, so as to realize different light effects.

[0039] As an example, when a diffraction grating 40 is provided on the turntable 34 or rotating component 32, when the diffraction grating 40 rotates into the coverage area of ​​the emitted light, the emitted light penetrates the diffraction grating 40 and exits. During this period, as the diffraction grating 40 rotates around a predetermined axis O under the drive of the rotating mechanism 30, the incident angle of the emitted light on the diffraction grating 40 changes, which can be considered as the emitted light sweeping across the diffraction grating 40. Because the incident angle of the emitted light on the diffraction grating 40 changes, the exit angle of the emitted light after passing through the diffraction grating 40 also changes. Therefore, if the diffraction grating 40 is within the coverage area of ​​the emitted light during its rotation, the diffraction spot corresponding to the emitted light will also move linearly on the projection surface, causing multiple diffraction spots to exhibit linear movement on the imaging surface, creating an effect similar to a meteor shower, enriching the user's viewing experience. When the diffraction grating 40 continues to rotate until it is completely outside the coverage area of ​​the emitted light, no diffraction spots will appear on the imaging surface. As the rotating mechanism 30 rotates continuously, the diffraction spot on the imaging surface moves linearly at intervals and periods.

[0040] As another example, to further enrich the projected light effect, the rotating mechanism 30 can be equipped with multiple diffraction gratings 40 on the turntable 34, such as... Figure 6 As shown, a plurality of diffraction gratings 40 are arranged around the reflector 20 and are distributed sequentially at intervals on the outer periphery of the predetermined axis O / reflector 20. Each diffraction grating 40 can be perpendicular to the end face of the turntable 34 or the rotating member 32, that is, each diffraction grating 40 can be parallel to the predetermined axis O. The plurality of diffraction gratings 40 are generally closely adjacent to each other but spaced apart, and the plurality of diffraction gratings 40 are generally spirally radial relative to the reflector 20. Specifically, each diffraction grating 40 is neither parallel nor coincident with any diameter of the turntable 34 or the rotating member 32 (that is, any diameter of the circle of rotation of the diffraction grating 40). The diffraction grating 40 may specifically include a first end 41 and a second end 43, with the first end 41 being closer to the reflector 20 than the second end 43. That is, the distance between the first end 41 and the reflector 20 is less than the distance between the second end 43 and the reflector 20, so that the diffraction grating 40 extends obliquely outward relative to the center of the turntable 34 or the rotating member 32 (where the reflector 20 is located). Multiple diffraction gratings 40 extend obliquely outward relative to this center. Therefore, when multiple diffraction gratings 40 surround the outer periphery of the reflector 20, they are arranged in a roughly spiral radial pattern.

[0041] Further, the angle between two adjacent diffraction gratings 40 (the angle of the planes in which the two diffraction gratings 40 are located) is greater than or equal to 15 degrees and less than or equal to 75 degrees, for example, the angle can be greater than or equal to 40 degrees and less than or equal to 50 degrees; or, for example, the angle can be 45 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; 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 spot on the imaging surface can periodically linearly move almost without interruption. In the embodiment, the number of diffraction gratings 40 arranged on the rotating disc 34 of one rotating mechanism 30 is not limited, for example, the rotating disc 34 of one rotating mechanism 30 can be provided with six, seven, eight or ten or more diffraction gratings 40; or, for example, the number of diffraction gratings 40 arranged on the rotating disc 34 of one rotating mechanism 30 is greater than or equal to six and less than or equal to eight.

[0042] Specifically in Figure 6 In the embodiment shown, the rotating disc 34 of one rotating mechanism 30 is provided with eight diffraction gratings 40, the eight diffraction gratings 40 are all arranged around the peripheral region of the reflector 20, and one end of each diffraction grating 40 is relatively close to the reflector 20, and the other end extends away from the reflector 20, and the angle between two adjacent diffraction gratings 40 is about 45 degrees. Figure 6In the middle, the rotating mechanism 30 rotates clockwise, when the first diffraction grating 40 enters the coverage range of the outgoing light, the first diffraction grating 40 is substantially perpendicular to the light path of the outgoing light; with the rotation of the rotating mechanism 30, the relative angle of the first diffraction grating 40 to the light path of the outgoing light changes, when the relative angle changes to about 45 degrees to 50 degrees, the first diffraction grating 40 is out of the coverage range of the outgoing light, at this time the second diffraction grating 40 enters the coverage range of the outgoing light, ensuring the continuity of the projection light effect. Further, when the relative angle changes to about 45 degrees to 50 degrees, when the first diffraction grating 40 is out of the range of the outgoing light, and the second diffraction grating 40 enters the range of the outgoing light, the incident angle of the outgoing light on the second diffraction grating 40 is substantially 0°, so that the starting point of the diffraction spot projected by the second diffraction grating 40 is consistent with the starting point of the diffraction spot projected by the first diffraction grating 40, and the third, fourth, fifth, and so on. The starting point of the diffraction spot projected by the diffraction grating 40 is consistent with the starting point of the diffraction spot projected by the first diffraction grating 40, which ensures the consistency of the light effect in the technology of ensuring the continuity of the projection light effect, and forms a continuous and continuous shrinking or diverging light effect.

[0043] From Figure 6 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 degrees to 50 degrees (for example, 0 degrees to 45 degrees), which can ensure that the projected diffraction spot is always centered and diverges away from the center.

[0044] Please refer to Figure 7In some other embodiments, the number of rotating mechanisms 30 can be multiple, and the multiple rotating mechanisms 30 can be arranged on the substrate 60 in sequence and at intervals around a predetermined center, and the multiple rotating mechanisms 30 can be distributed at equal intervals. The rotating disc 34 or the rotating member 32 of each rotating mechanism 30 is provided with at least one diffraction grating 40, and 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, and the structural stability is improved. Correspondingly, the number of reflecting members 20 and the number of first light sources 10 can also be multiple. The multiple reflecting members 20 and the multiple first light sources 10 are arranged one by one, for example, the light emitting surface of each reflecting member 20 and the corresponding first light source 10 are arranged oppositely, so as to reflect the incident light of the corresponding first light source 10. The multiple reflecting members 20 and the multiple rotating mechanisms 30 are arranged one by one, for example, each reflecting member 20 is arranged on the rotation center (i.e. the predetermined axis O) of a rotating mechanism 30, so as to reflect the incident light of the corresponding first light source 10 to the diffraction grating 40 on the rotating mechanism 30. Therefore, by arranging the multiple rotating mechanisms 30 on the substrate 60 in sequence and at intervals around the predetermined center, for example, the multiple rotating mechanisms 30 can be arranged in a circumferential arrangement, and the light emitted from the diffraction gratings 40 corresponding to the multiple rotating mechanisms 30 can cover the projection area corresponding to the circumferential arrangement. After the emitted light of the corresponding first light source 10 is reflected by each reflecting member 20 to the diffraction grating 40 of the corresponding rotating mechanism 30, the linear movement of the diffraction spot in the projection area corresponding to the circumferential arrangement can present a diverging effect from the center to the periphery or a converging effect from the periphery to the center.

[0045] In the present embodiment, the number of first light sources 10, reflecting members 20 and rotating mechanisms 30 is three, and the three rotating mechanisms 30 are distributed at equal intervals on the periphery of the transmission member 74. Measured by the relative positions of the corresponding rotating axes of each rotating mechanism 30, the angle between the corresponding rotating axis of each rotating mechanism 30 and the corresponding rotating axis of the rotating mechanism 30 adjacent to the rotating mechanism 30 can be considered as 120 degrees. Therefore, in the present embodiment, when the transmission member 74 drives the rotating mechanism 30 to rotate, three groups of star point arrays with an included angle of 120 degrees will be projected on the imaging surface. Visually, the star points on the entire projection surface are doing linear motion from the inside to the outside, thereby forming a shuttle effect.

[0046] Similarly, in other embodiments, when the number of the first light source 10, the reflecting member 20 and the rotating mechanism 30 is four, the four rotating mechanisms 30 are distributed equidistantly on the periphery of the transmission member 74. Measured by the relative position of the rotating axis corresponding to each rotating mechanism 30, it can be considered that the angle between the rotating axis corresponding to each rotating mechanism 30 and the transmission axis corresponding to the rotating mechanism 30 adjacent to the rotating mechanism 30 is 90 degrees. Therefore, when the transmission member 74 drives the rotating mechanism 30 to rotate, four groups of star point arrays with an angle of 90 degrees will be projected on the imaging surface. In vision, the star points on the whole projection surface are doing linear motion from inside to outside, thereby forming the shuttle feeling. By analogy, in other embodiments, the number of the first light source 10, the reflecting member 20 and the rotating mechanism 30 can be two, four or more than four.

[0047] Further, in the embodiments as shown in Figure 7 and Figure 8 , the plurality of rotating mechanisms 30 are driven by the same driving mechanism 70. At this time, the driving mechanism 70 includes the rotating driving source 72 and the transmission member 74 (worm) as described above. The transmission member 74 (worm) is located at the predetermined center of the base plate 60, and the plurality of rotating mechanisms 30 are arranged around the transmission member 74 (worm) and arranged in a circle on the periphery of the transmission member 74 (worm). The rotating disc 34 (gear) of each rotating mechanism 30 is engaged with the transmission member 74 (worm), and when the transmission member 74 (worm) rotates, the rotating disc 34 (gear) of the plurality of rotating mechanisms 30 can be driven to rotate at the same time, thereby making the linear movement of the diffraction spot in the projection area corresponding to the circle can present the effect of divergence from the center to the periphery or contraction from the periphery to the center. By driving the plurality of rotating mechanisms 30 to rotate at the same time through the driving mechanism 70, the structure of the projection imaging device 100 can be more compact and the movement rhythm consistency of the diffraction spot is better.

[0048] In the above embodiments, the transmission between the driving mechanism 70 and the rotating mechanism 30 is the meshing transmission between the worm and the cylindrical gear. In other embodiments, the transmission between the driving mechanism 70 and the rotating mechanism 30 can also be realized through other structures. For example Figure 9In 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), and the rotating disc 34 of the rotating mechanism 30 also comprises a bevel gear structure (or the rotating disc 34 itself is a bevel gear), the rotation axis of the bevel gear of the rotating disc 34 is the predetermined axis O, and the two bevel gear structures are in meshing transmission with each other, and the diffraction grating 40 is arranged on the end face of the bevel gear of the rotating disc 34. When the number of the rotating mechanisms 30 is multiple, for example, two or more, the rotating discs 34 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 meshing transmission 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.

[0049] Please refer again to Figure 2 In some embodiments, the projection imaging device 100 can further comprise a second light source 80 arranged in the interior of the housing 50, and the light rays of the second light source 80 are 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 used to project a specified image, for example, a starry sky background image. Therefore, 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 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 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 are respectively emitted through one light exit port 521, so that the projection imaging device 100 can form different light effects in different areas to meet the diversified projection needs of users.

[0050] In the present embodiment, the second light source 80 can be fixedly arranged in the interior of the housing 50, or the second light source 80 can be movably arranged in the interior of the housing 50, so that the image corresponding to the second light source 80 also moves 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 on the end portion of the transmission member 74 and rotated with the transmission member 74. On the basis of adding an additional driving mechanism, the rotating motion of the background image can be realized, which is different from the linear motion brought by the diffraction grating 40, so that the whole picture has more levels and atmosphere, and the user's viewing experience is further enriched.

[0051] Please refer to Figure 10The lamp 200 includes a circuit board 210 and the projection imaging device 100. The circuit board 210 can be fixed on the substrate 60, and the projection imaging device 100 is electrically connected to the circuit board 210.

[0052] 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 and / or 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.

[0053] 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, and is configured to provide power for the first light source 10, the rotating mechanism 30 and the second light source 80.

[0054] The projection imaging device and the lamp provided by the present application can realize various imaging effects, and can enrich the viewing experience of users.

[0055] In actual applications, when the diffraction grating, the corresponding rotating mechanism, the reflecting member and the first light source are all provided with multiple ones, the outcoming light is outcoming through the multiple diffraction gratings to form multiple light spots or star points on the projection surface, and the linear movement rule of the multiple light spots or star points 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 can present a diverging effect from the center to the periphery or a converging effect 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 can present an array movement effect, which is similar to the falling effect of a meteor shower. Therefore, the projection imaging device and the lamp provided by the present application can realize various imaging effects, and can enrich the viewing experience of users.

[0056] In this specification, certain terms are used to refer to particular components. One of ordinary skill in the art will understand that hardware manufacturers can refer to a component by different names and that the names given to the components in this specification are intended to be flexible. This specification describes a component in function, rather than name. As used throughout this specification, the term "includes" or "including" means, "including but not limited to". The term "substantially" means that the technology can solve the technical problem with some error range, and basically achieves the technical effect.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "inner", etc. indicate the orientation or positional relationship shown in the drawings, and are only used to simplify the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0058] In this application, unless otherwise expressly specified or limited, the terms "mounting", "connection", "connecting", "fixing" 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 communication of two elements, or it can be 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.

[0059] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 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.

[0060] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that the technical solutions described in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and 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 projection imaging apparatus, characterized by comprising: The application relates to an imaging device. The application comprises: a plurality of first light sources, each of which is used for generating incident light; a plurality of reflecting elements, which are arranged one by one in correspondence with the plurality of first light sources, each of which is fixedly arranged on an optical path of incident light of the corresponding first light source, and is used for reflecting the incident light to form outgoing light; a plurality of rotating mechanisms, which are arranged in sequence and at intervals around a predetermined center, and are arranged one by one in correspondence with the plurality of first light sources; each rotating mechanism is arranged at intervals with the corresponding first light source, and each reflecting element is used for reflecting the incident light of the corresponding first light source to a diffraction grating on the corresponding rotating mechanism; and a plurality of diffraction gratings; each rotating mechanism is provided with a plurality of diffraction gratings on a rotating part; on each rotating part: the plurality of diffraction gratings are arranged in sequence and at intervals around the reflecting element and on the outer periphery of the reflecting element, each diffraction grating presents a state of extending obliquely outward relative to the reflecting element, and when the plurality of diffraction gratings are arranged around the outer periphery of the reflecting element, the diffraction gratings are arranged in a spiral radiation shape; on each rotating part: each diffraction grating can be rotated to an optical path of corresponding outgoing light under the driving of the rotating mechanism, so as to transmit the outgoing light, so that the outgoing light can penetrate each diffraction grating in sequence and one by one to be emitted, thereby forming moving diffraction spots on an imaging surface; 2. The projection imaging apparatus according to claim 1, characterized by when the diffraction gratings rotate around a predetermined axis under the driving of the rotating mechanism, the incident angle of the outgoing light on the diffraction gratings changes, so that the linear movement of the diffraction spots on the imaging surface presents a dynamic state of divergence from the center to the periphery or contraction from the periphery to the center.

3. The projection imaging apparatus according to claim 2, characterized by The reflecting element is located on the predetermined axis, a reflecting surface of the reflecting element is arranged towards an outgoing surface of the first light source, and an optical path of the incident light between the first light source and the reflecting surface is consistent with the predetermined axis.

4. The projection imaging apparatus according to claim 2, characterized by The plane where the diffraction gratings are located is not parallel to nor coincident with any diameter of a revolution circle of the diffraction gratings; the diffraction gratings comprise opposite first and second ends, the distance between the first end and the reflecting element is smaller than the distance between the second end and the reflecting element, and the included angle between two adjacent diffraction gratings is greater than or equal to 15 degrees and smaller than or equal to 75 degrees. Each diffraction grating is parallel to and arranged at intervals with the predetermined axis, the number of the diffraction gratings arranged on the rotating mechanism is greater than or equal to six and smaller than or equal to eight; the plane where the diffraction gratings are located is not parallel to nor coincident with any diameter of a revolution circle of the diffraction gratings; the diffraction gratings comprise opposite first and second ends, the distance between the first end and the reflecting element is smaller than the distance between the second end and the reflecting element, and the included angle between two adjacent diffraction gratings is greater than or equal to 40 degrees and smaller than or equal to 50 degrees.

5. The projection imaging apparatus according to claim 2, characterized by The reflecting member is fixedly arranged on the side of the rotating mechanism facing the light exit surface, the reflecting surface is located on the predetermined axis, and the angle between the reflecting surface and the predetermined axis is greater than or equal to 15 degrees and less than or equal to 75 degrees, and the plane on which the diffraction grating is located is not coincident with the predetermined axis.

6. The projection imaging apparatus according to claim 1, characterized by The projection imaging device further comprises a substrate, and the first light source is fixedly arranged on the substrate; the rotating mechanism comprises a rotating driving member and a rotating member, the rotating driving member is arranged on the substrate, the rotating member is connected to the output end of the rotating driving member, and the diffraction grating is mounted on the rotating member.

7. The projection imaging apparatus according to claim 1, characterized by The projection imaging device further comprises a substrate, a rotating driving source and a transmission member, and the rotating driving source is mounted on the substrate; The rotating mechanism comprises a rotating disc, the rotating disc is drivingly connected to the rotating driving source through the transmission member, and the rotating disc rotates around the predetermined axis under the driving of the rotating driving source; and the diffraction grating is arranged on the rotating disc.

8. The projection imaging apparatus according to claim 7, characterized by The transmission member is a worm, the rotating disc is a cylindrical gear, the cylindrical gear is engaged with the worm, and the diffraction grating is arranged on the end face of the gear; or The transmission member comprises a bevel gear structure, the rotating disc comprises a bevel gear structure, the bevel gears of the rotating disc and the bevel gear structure of the transmission member are engaged with each other, and the diffraction grating is arranged on the end face of the rotating disc.

9. The projection imaging apparatus according to claim 8, characterized by The rotating driving source and the rotating mechanism are respectively located on opposite sides of the substrate, and the transmission member penetrates through the substrate and is engaged with the rotating disc.

10. The projection imaging apparatus according to claim 8, characterized by The number of the rotating mechanisms is multiple, the multiple rotating mechanisms are sequentially and spacedly arranged on the substrate around the outer periphery of the transmission member, the rotating discs of the multiple rotating mechanisms are all engaged with the transmission member, and at least one diffraction grating is arranged on each rotating disc of the rotating mechanisms; The number of the reflecting members and the number of the first light sources are both multiple, the multiple reflecting members and the multiple first light sources are one-to-one correspondingly arranged, and the multiple reflecting members and the multiple rotating mechanisms are one-to-one correspondingly arranged; each reflecting member is used for reflecting the incident light of the corresponding first light source to the diffraction grating on the corresponding rotating mechanism.

11. The projection imaging apparatus according to claim 1, characterized by The rotating mechanism comprises a connecting seat and a rotating disc, the rotating disc is rotatably arranged on the connecting seat, the rotating center of the rotating disc is provided with a receiving hole, and the reflecting member penetrates through the receiving hole and is fixedly connected with the connecting seat; or The rotating mechanism comprises a connecting seat and a rotating member, the rotating member is rotatably arranged on the connecting seat, the rotating center of the rotating member is provided with a receiving hole, and the reflecting member penetrates through the receiving hole and is fixedly connected with the connecting seat. The projection imaging device further comprises a housing and a second light source, the first light source, the reflecting member, the diffraction grating and the rotating mechanism are all arranged in the housing; the housing is provided with a light exit port, the light exit port is located on the light path of the light emitted through the diffraction grating; the second light source is arranged in the housing, and the light of the second light source is emitted through the light exit port.

12. The projection imaging apparatus according to any one of claims 1 to 11, wherein The projection imaging device comprises:

13. A luminaire characterized by, a circuit board; and a light source. ​ The projection imaging device according to any one of claims 1 to 12, which is electrically connected to the circuit board.

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