CN117215145B

CN117215145B - Projection imaging device and lamp

Info

Publication number: CN117215145B
Application number: CN202311488802.7A
Authority: CN
Inventors: 梁修慧; 吴文龙
Original assignee: Shenzhen Zhiyan Technology Co Ltd; Shenzhen Qianyan Technology Co Ltd
Current assignee: Shenzhen Zhiyan Technology Co Ltd; Shenzhen Qianyan Technology Co Ltd
Priority date: 2023-11-09
Filing date: 2023-11-09
Publication date: 2024-02-23
Anticipated expiration: 2043-11-09
Also published as: CN117215145A

Abstract

The application relates to the technical field of lighting equipment, in particular to a projection imaging device and a lamp, which comprise a first light-emitting module and a base. The first light emitting module is used for emitting light to the receiving surface to form a first pattern on the receiving surface. The first light emitting module comprises a first light source, a rotating mechanism and diffraction gratings, wherein the number of the diffraction gratings is one, the diffraction gratings are arranged on the rotating mechanism and are positioned on the light path of the emergent light, the diffraction gratings can rotate around the central axis under the driving of the rotating mechanism, and the included angle between the diffraction gratings and the light path of the emergent light is changed when the diffraction gratings rotate, so that the emergent light can realize gradual change on-off effect through a first pattern formed after the emergent light is emitted through the diffraction gratings. The projection imaging device can form a movable breathing star pattern on the receiving surface and has the advantages of simple structure, small volume and light weight.

Description

Projection imaging device and lamp

Technical Field

The application relates to the technical field of lighting equipment, in particular to a projection imaging device and a lamp.

Background

At present, when a common star lamp presents a star image, a technical scheme that a laser emitter irradiates a grating sheet is often adopted, so that projection pictures such as star patterns are presented. On the basis of the above technology, in order to achieve the moving effect of the star point pattern, a rotating member is usually required to be further provided with a plurality of grating sheets, and the plurality of grating sheets can continuously rotate along with the rotating member, and at any moment, it is required to ensure that laser emitted by the laser emitter passes through at least one grating sheet. Because a plurality of grating sheets continuously rotate along with the rotating piece, the laser emitted by the laser emitter can form movable star point pattern projection on the receiving surface after being diffracted by the rotating grating sheets, so that the visual effect of projection lamplight is enriched.

However, the above technical solution is relatively complex in structure, and requires a relatively large-sized grating sheet carrier to mount a plurality of grating sheets, so that a large space is occupied to result in a large size of the star light, and in addition, the star light weight is increased, so that improvement is needed.

Disclosure of Invention

The application provides a projection imaging device, and the application also provides a lamp.

In a first aspect, the present application provides a projection imaging apparatus including a first light emitting module and a base. The first light emitting module is used for emitting light rays to the receiving surface so as to form a first pattern on the receiving surface; the first light emitting module comprises a first light source, a rotating mechanism and diffraction gratings, the diffraction gratings are located on the light path of the emergent light, the number of the diffraction gratings is one, the diffraction gratings rotate around the central axis under the driving of the rotating mechanism, and the included angle between the diffraction gratings and the light path of the emergent light changes when the diffraction gratings rotate, so that the emergent light can realize a dynamic display effect through a first pattern formed after the emergent light is emitted through the diffraction gratings.

In a second aspect, the present application further provides a lamp, which includes a circuit board and the projection imaging device, where the projection imaging device is electrically connected to the circuit board.

In the projection imaging device provided by the application, through setting up first light emitting module in order to form first pattern on the receiver surface, because first light emitting module includes first light source, rotary mechanism and diffraction grating, first light source is used for producing emergent light, diffraction grating sets up in rotary mechanism and is located emergent light's light road, diffraction grating's quantity is one and diffraction grating can rotate around the central axis under rotary mechanism's drive, diffraction grating changes with the contained angle between the light path of emergent light when rotating, so that emergent light realizes dynamic display effect at the first pattern that forms after penetrating through diffraction grating. Through above-mentioned setting, rotary mechanism accessible drives diffraction grating and rotates and make first pattern take place to remove on the receiver surface, and this can strengthen the dynamic effect of projection pattern to further improve the variety of projection pattern, bring more ornamental visual experience for the user.

Further, since the number of the diffraction gratings is one, the number of the diffraction gratings is reduced, and the volume and the weight of the carrier of the diffraction gratings can be further reduced, so that the projection imaging device is beneficial to simplifying the structure, reducing the volume and realizing the light weight.

Drawings

In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a projection imaging apparatus according to some embodiments of the present application.

Fig. 2 is a schematic structural diagram of a projection imaging apparatus according to another embodiment of the present application.

Fig. 3 is a schematic view of the projection imaging apparatus in fig. 2 at another viewing angle.

Fig. 4 is a schematic structural view of the rotary driving source and the transmission member in fig. 3.

Fig. 5 is a schematic structural view of a projection imaging apparatus according to other embodiments of the present application.

Fig. 6 is an exploded view of a structure of a second light emitting module in some embodiments of the present application.

Fig. 7 is a structural cross-sectional view of a second light emitting module in other embodiments of the present application.

Fig. 8 is a structural exploded view of a second light emitting module in other embodiments of the present application.

Fig. 9 is a structural cross-sectional view of a luminaire in some embodiments of the present application.

Fig. 10 is a schematic diagram illustrating a positional relationship between a first light emitting module and a diffraction grating according to some embodiments of the present application.

Description of the reference numerals: 100. a projection imaging device; 10. a first light emitting module; 101. a first light source; 102. a rotation mechanism; 1021. a rotating member; 1022. a rotary driving member; 103. a diffraction grating; 20. a second light emitting module; 201. a light mixing lens; 202. a first light emitting module; 2021. a first light emitting unit; 203. a lens holder; 2031. a light-transmitting hole; 204. a lens; 2051. a film; 2052. a sliding support; 2053. a first condenser lens; 2054. a convex lens; 206. a second light emitting module; 2071. a second condenser lens; 2072. a grain piece; 2073. a short focal lens; 208. a third light emitting module; 30. a base; 301. a substrate; 302. a first mounting bracket; 303. a second mounting bracket; 304. a first light transmitting member; 3041. a first light-transmitting channel; 305. a second light-transmitting member; 3051. a second light-passing channel; 40. a rotation driving source; 401. a connecting gear; 50. a transmission member; 200. a lamp; 210. a circuit board; 21. a housing; 22. a light outlet; 23. a mounting cavity.

Detailed Description

In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, it is to be understood that the terms "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal", etc. indicate an azimuth or a status relationship based on the azimuth or status relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or state relationships, for example, the term "upper" may also be used to indicate some sort of dependency or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

Furthermore, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like should be construed broadly. For example, the connection can be fixed connection, detachable connection or integral connection; can be mechanically or electrically connected; the connection may be direct, indirect via an intermediate medium, or communication between two elements, or only surface contact. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

As a particular component is referred to by some of the terms used in the description and claims, it should be understood by those skilled in the art that a hardware manufacturer may refer to the same component by different terms. The description and claims do not take the difference in name as a way of distinguishing between components, but rather take the difference in functionality of the components as a criterion for distinguishing. As used throughout the specification and claims, the word "comprise" and "comprises" are to be construed as "including, but not limited to"; by "substantially" is meant that a person skilled in the art can solve the technical problem within a certain error range, essentially achieving the technical effect.

Referring to fig. 1, an embodiment of the present application provides a projection imaging apparatus 100 adapted to emit light toward a receiving surface to form projection patterns on the receiving surface, for example, the projection patterns may be illumination or decoration patterns resembling a starry sky effect. The receiving surface is a plane for receiving the light emitted from the projection imaging apparatus 100, and may be, for example, a wall, a floor, a ceiling, or the like. The projection imaging apparatus 100 emits light to irradiate the receiving surface to form a projection pattern, and the projection pattern has a decorative effect and a lighting effect.

The projection imaging apparatus 100 includes a first light emitting module 10 and a base 30. The base 30 is a mounting member of the projection imaging apparatus 100 for mounting a light emitting module or other components, and the first light emitting module 10 is mounted to the base 30.

The first light emitting module 10 is configured to emit light toward the receiving surface to form a first pattern on the receiving surface. The first light emitting module 10 includes a first light source 101, a rotation mechanism 102, and a diffraction grating 103. The first light source 101 is used for generating outgoing light, and the first light source 101 may be any light source, such as a laser light source, an RGBW-LED light source, or an RGB-LED light source. The rotation mechanism 102 is disposed at a distance from the first light source 101. The diffraction grating 103 is provided on the rotation mechanism 102 and is located on the optical path of the emitted light. The angle between the diffraction grating 103 and the light path of the emergent light changes during rotation, so that the emergent light can realize a dynamic display effect on a first pattern formed on the receiving surface after being emitted through the diffraction grating 103.

Through the above arrangement, the rotation mechanism 102 can drive the diffraction grating 103 to rotate to enable the first pattern to move on the receiving surface (as an example, the first pattern can reciprocate on the receiving surface along a straight line), which can enhance the dynamic effect of the projection pattern, thereby further improving the diversity of the projection pattern and bringing more ornamental visual experience to the user.

Further, since the light emitted by the first light source 101 is directly diffracted by the single diffraction grating 103 and is emitted onto the receiving surface, the number of the diffraction gratings 103 is reduced, and the volume and weight of the carrier (hereinafter, the rotation member 1021) of the diffraction grating 103 can be reduced, so that the projection imaging apparatus 100 is advantageous to simplify the structure, reduce the volume, and achieve light weight.

Referring to fig. 1, in some embodiments, a plane of the diffraction grating 103 coincides with a central axis O (the central axis O may be understood as a central axis of the rotation mechanism 102), and an optical path of the outgoing light is perpendicular to the central axis O or perpendicular to the different planes. With the above arrangement, since the plane in which the diffraction grating 103 is located coincides with the central axis O, the diffraction grating 103 is disposed at the center of the rotation mechanism 102, and the above arrangement can further reduce the volume and weight of the carrier (hereinafter, the rotation member 1021) of the diffraction grating 103 relative to other positions disposed at the rotation mechanism 102, thereby being more advantageous in simplifying the structure, reducing the volume, and realizing the weight reduction of the projection imaging apparatus 100.

Referring to fig. 1, in some embodiments, the base 30 includes a substrate 301 and a first mounting bracket 302, the substrate 301 is substantially plate-shaped, the substrate 301 is a main body portion of the base 30, the first mounting bracket 302 is connected to the substrate 301, and the first mounting bracket 302 is used to implement mounting connection between the substrate 301 and other components. The rotation mechanism 102 includes a rotation member 1021, and the rotation member 1021 is used to drive the diffraction grating 103 to rotate. The rotation member 1021 is rotatably disposed on the base 30, specifically, the rotation member 1021 is rotatably connected to the first mounting frame 302, and the diffraction grating 103 is mounted on the rotation member 1021. Through the above arrangement, the first mounting bracket 302 realizes the rotational connection between the rotation member 1021 and the base 30, and when the rotation member 1021 rotates, the diffraction grating 103 can follow the rotation, thereby changing the included angle between the diffraction grating 103 and the light path of the outgoing light.

Referring to fig. 10, fig. 10 shows a schematic diagram of a positional relationship between the first light emitting module 10 and the diffraction grating 103, where A1 and A2 respectively represent two transient states of the diffraction grating 103 during rotation, and an angle between the emergent light emitted from the first light emitting module 10 and the diffraction grating 103 continuously changes during rotation of the diffraction grating 103 from the A1 state to the A2 state, in which, a first pattern formed on a receiving surface after the emergent light emitted from the first light emitting module 10 is diffracted by the diffraction grating 103 can continuously move along a straight line, and the first pattern can accelerate to move, when the diffraction grating 103 moves to a plane where the diffraction grating 103 itself is parallel to a light path of the emergent light or parallel to a different plane, the first pattern disappears on the receiving surface, and then as the diffraction grating 103 continues to rotate, the first pattern reappears on the receiving surface and gradually decelerates, and the above process is repeated, so that the first pattern can exhibit a gradual overall bright-dark dynamic effect on the receiving surface. Taking the first pattern as an example, the star points can provide the projection use experience similar to starry sky breathing for the user.

The diffraction grating 103 may be driven by the rotation mechanism 102 to rotate clockwise or counterclockwise, which is not particularly limited in the embodiment of the present application.

In the embodiment shown in fig. 1, the rotation mechanism 102 further includes a rotation driving member 1022, and the rotation driving member 1022 is used to drive the rotation member 1021 to rotate. In this embodiment, the rotary driving member 1022 is a motor, the rotary member is a mount member connected to an output shaft of the motor, and the diffraction grating 103 is fixedly connected to the mount member. The rotation driving member 1022 is disposed on the base 30, and specifically, the rotation driving member 1022 is disposed on the first mounting bracket 302. The rotation member 1021 is connected to an output end of the rotation driving member 1022, and the rotation member 1021 is rotated around the center axis O by the rotation driving member 1022. Through the arrangement, when the motor drives the output shaft to rotate, the output shaft can drive the rotating piece to rotate, so that the diffraction grating 103 is driven to rotate, and the included angle between the diffraction grating 103 and the light path of emergent light is changed, so that the position of the first pattern on the receiving surface is adjusted.

In the embodiment shown in fig. 2 and 3, the base 30 further includes a second mounting bracket 303 connected to the substrate 301, and the second mounting bracket 303 and the first mounting bracket 302 are respectively located on two sides of the substrate 301. The projection imaging apparatus 100 further includes a rotation driving source 40 and a transmission member 50, wherein the rotation driving source 40 is mounted on the base 30, specifically, the rotation driving source 40 is mounted on the second mounting bracket 303. The rotation member 1021 is connected to the rotation driving source 40 through the transmission member 50 to rotate around the central axis O under the driving of the rotation driving source 40. The diffraction grating 103 is provided to the transmission member 50. In the embodiment shown in fig. 2 and 3, the rotary driving source 40 is a motor, the output shaft of the motor is provided with a connecting gear 401, the transmission member 50 is a rack, the connecting gear 401 is meshed with the rack, the rotation member 1021 is a cylindrical gear, the cylindrical gear is meshed with the rack, and the diffraction grating 103 is disposed on the end face of the cylindrical gear.

Referring to fig. 4, with the above arrangement, when the output shaft of the rotary driving source 40 rotates, the connecting gear 401 can follow the rotation to drive the rack to move up and down, and the rack can drive the cylindrical gear and the diffraction grating 103 to rotate back and forth, so as to change the included angle between the diffraction grating 103 and the light path of the emergent light, so as to realize the adjustment of the position of the first pattern on the receiving surface.

In the embodiment shown in fig. 5, the rotary driving source 40 is a motor, the transmission member 50 is a worm, an output shaft of the motor is fixedly connected with the worm, the rotation member 1021 is a cylindrical gear, the worm is meshed with the cylindrical gear, and the diffraction grating 103 is disposed on an end face of the cylindrical gear. Through the arrangement, when the motor rotates, the output shaft of the motor drives the worm to rotate, and the worm drives the cylindrical gear and the diffraction grating 103 to rotate, so that the included angle between the diffraction grating 103 and the light path of emergent light is changed, and the position of the first pattern on the receiving surface is adjusted.

In some embodiments, the rotation driving source 40 and the rotation mechanism 102 are respectively located at two opposite sides of the base 30, and the transmission member 50 is disposed through the base 30 and is in transmission connection with the rotation member 1021. Specifically, the rotation driving source 40 and the rotation mechanism 102 are respectively located at two opposite sides of the substrate 301, and the transmission member 50 is disposed through the substrate 301 and is in transmission connection with the rotation member 1021 (for example, in the embodiments of fig. 2, 3, and 5). Through the above arrangement, the rotation driving source 40 and the rotation mechanism 102 can be respectively arranged at different sides of the base 30, so that the positions of the rotation driving source and the rotation mechanism can be flexibly set according to the requirements, thereby reducing the occupied area of the projection imaging device 100 and avoiding the waste of the use space due to excessively large volume of the projection imaging device 100.

Referring to fig. 5, in some embodiments, the number of the rotation mechanisms 102 and the number of the first light sources 101 are plural, and the rotation mechanisms 102 are sequentially disposed on the base 30 at intervals around a predetermined center X (the predetermined center X can understand the central axis of the substrate 301), and at least one diffraction grating 103 is disposed on each rotation mechanism 102. In the present embodiment, three rotation mechanisms 102 and three first light sources 101 are provided, and one diffraction grating 103 is provided on each rotation mechanism 102. In other embodiments, the number of the rotation mechanisms 102 and the first light sources 101 may be any number of two, four, five, or the like, and only one diffraction grating 103 is disposed on each rotation mechanism 102. In the present embodiment, the plurality of rotation mechanisms 102 and the plurality of first light sources 101 are arranged in one-to-one correspondence, and the outgoing light of each first light source 101 is emitted onto the diffraction grating 103 on the corresponding rotation mechanism 102. Through the arrangement, each rotating mechanism 102 and each first light source 101 are matched to generate a movable first pattern on the receiving surface, and as a plurality of first rotating mechanisms 102 and first light sources 101 are arranged, a plurality of first patterns moving along different directions can be generated on the receiving surface, so that the diversity of projection patterns is further improved, the dynamic effect of the projection patterns is enhanced, and the user experience is improved.

Referring to fig. 1, in some embodiments, the projection imaging apparatus 100 further includes a second light emitting module 20, where the second light emitting module 20 is adapted to emit a second pattern to the receiving surface, the second pattern is different from the second pattern, and the second pattern and the first pattern are superimposed on the receiving surface to form a projection pattern. Through the setting, the projection patterns can be richer and more various, and the use experience of a user is improved.

In the embodiment shown in fig. 6, the second light emitting module 20 includes a light mixing lens 201 and a first light emitting module 202. The first light emitting module 202 includes a plurality of first light emitting units 2021, and the first light emitting units 2021 may be any light emitting units, for example, a laser light emitting unit, an RGBW-LED light emitting unit, an RGB-LED light emitting unit, or the like. The first light emitting units 2021 are disposed on the substrate 301, the colors of the light emitted by the plurality of first light emitting units 2021 are different, and the light mixing lens 201 is disposed on the base 30 and located on the light path of the light emitted by the plurality of first light emitting units 2021, so as to mix the light of the plurality of first light emitting units 2021. For mounting the second light emitting module 20 or parts thereof, the base 30 may further include a lens holder 203 coupled with the substrate 301. Specifically, the light mixing lens 201 is disposed on the lens support 203, the lens support 203 is disposed between the first light emitting units 2021 and the light mixing lens 201, the lens support 203 is provided with a light passing hole 2031, the lens support 203 and the light mixing lens 201 are both disposed on the light paths of the light rays emitted by the plurality of first light emitting units 2021, and the light rays emitted by the plurality of first light emitting units 2021 (i.e. the first light emitting modules 202) sequentially pass through the light passing hole 2031 and the light mixing lens 201 to form a second pattern on the receiving surface.

Through the above arrangement, the light rays emitted by the plurality of first light emitting units 2021 are irradiated onto the mixing lens through the light passing holes 2031, the mixing lens mixes the plurality of light rays to obtain a mixed light beam, and the mixed light beam is emitted from the mixing lens onto the receiving surface, so that a second pattern with uniform color mixing can be obtained, and the visual effect is better.

In the embodiment shown in fig. 7, the second light emitting module 20 includes a projection lens 204, a film module, and a second light emitting module 206. The film module includes a film 2051 and a sliding bracket 2052, the sliding bracket 2052 being slidably connected to the base 30. Specifically, the slide holder 2052 is slidably connected to the base plate 301. The film 2051 is mounted on the sliding bracket 2052, and can relatively approach or depart from the light path of the light emitted by the second light emitting module 206 under the driving of the sliding bracket 2052. The second light emitting module 206 may include one or more second light emitting units, which may be any device capable of emitting light, for example, the one or more second light emitting units may include at least one of the following light emitting units: a laser light emitting unit, an RGBW-LED light emitting unit, an RGB-LED light emitting unit, or the like. The light emitted by the second light emitting module 206 sequentially passes through the film module and the projection lens 204 to form a second pattern on the receiving surface. Through the arrangement, the second pattern can present the pattern corresponding to the film 2051 so as to improve the ornamental value of the projected pattern, and a user can replace different film 2051 with different patterns through the sliding support 2052, so that the projected patterns with different patterns are obtained, and the personalized use requirement of the user can be met.

In the embodiment shown in fig. 7, the base 30 further includes a first light-transmitting member 304 connected to the substrate 301, and as an example, the first light-transmitting member 304 is substantially cylindrical. The first light-transmitting member 304 is internally provided with a first light-transmitting channel 3041, and the first light-transmitting channel 3041 penetrates through two ends of the first light-transmitting member 304 along an axial direction of the first light-transmitting member 304. The first light-transmitting member 304 is located between the sliding support 2052 and the second light-emitting module 206, the second light-emitting module 206 is disposed at one end of the first light-transmitting member 304, and the light emitted by the second light-emitting module 206 is incident into the first light-transmitting channel 3041. In this embodiment, the film module further includes a first condensing lens 2053 and a convex lens 2054, the first condensing lens 2053 is disposed at one end of the first light-transmitting member 304 near the second light-emitting module 206, and the convex lens 2054 is disposed at one end of the first light-transmitting member 304 far from the second light-emitting module 206. Through the above arrangement, the light emitted by the second light emitting module 206 is first condensed by the first condensing lens 2053, then enters the first light-transmitting channel 3041, is condensed by the convex lens 2054 and is emitted onto the film 2051, and then is emitted onto the projection lens 204 by the film 2051, and finally is emitted onto the receiving surface to form the second pattern. Through the above arrangement, the first condensing lens 2053 and the convex lens 2054 are beneficial to the light emitted by the second light emitting module 206 to be more intensively irradiated onto the film 2051, so that the imaging effect of the second pattern is improved, and the image quality of the projected pattern is further improved.

In the embodiment shown in fig. 8, the second light emitting module 20 includes a texture projection module and a third light emitting module 208. The light of the second light emitting module 20 exits through the texture projection module. The third light emitting module 208 may include one or more third light emitting units, which may be any light emitting unit, for example, the one or more third light emitting units may include at least one of the following light emitting units: a laser light emitting unit, an RGBW-LED light emitting unit, an RGB-LED light emitting unit, or the like.

In order to install the texture projection module, the base 30 in this embodiment may further include a second light-transmitting member 305 connected to the substrate 301, and the texture projection module is disposed in the second light-transmitting member 305. As one example, the second light transmissive element 305 is substantially cylindrical. The second light-transmitting member 305 is internally provided with a second light-transmitting channel 3051, and the second light-transmitting channel 3051 penetrates through two ends of the second light-transmitting member 305 along an axial direction of the second light-transmitting member 305. The line projection module includes a second condensing lens 2071, a line piece 2072 and a short focal lens 2073, where the second condensing lens 2071, the line piece 2072 and the short focal lens 2073 are sequentially arranged along the light path of the third light emitting module 208. Specifically, the third light emitting module 208 and the short focal lens 2073 are respectively located at two ends of the second light transmitting member 305, the third light emitting module 208 is mounted on the substrate 301, and the short focal lens 2073 is mounted on the second light transmitting member 305. The second light converging lens 2071 is disposed corresponding to the third light emitting module 208, and the grain piece 2072 is disposed in the second light passing channel 3051 and between the second light converging lens 2071 and the short focal lens 2073. In this embodiment, the textured sheets 2072 are provided with two textured sheets spaced apart from each other, and in other embodiments, the number of textured sheets 2072 may be any number of one, three, four, five, etc. The light emitted by the third light emitting module 208 sequentially passes through the second condensing lens 2071, the grain piece 2072 and the short focal lens 2073, and the light emitted by the third light emitting module 208 forms a second pattern on the receiving surface after passing through the grain projection module.

Through the above arrangement, the light emitted by the third light emitting module 208 is condensed by the second condensing lens 2071, then enters the second light passing channel 3051 and passes through the grain piece 2072, and finally is emitted to the receiving surface through the short focal lens 2073 to form a second pattern, and the second pattern formed on the receiving surface can show grains on the grain piece 2072, so that the patterns of the second pattern can be enriched, and the effect of improving the overall ornamental value of the second pattern and the projection pattern can be achieved.

In summary, in the projection imaging apparatus 100 provided in the present embodiment, the first light emitting module 10 is configured to form the first pattern on the receiving surface, the second light emitting module 20 is configured to form the second pattern different from the first pattern on the receiving surface, and the first pattern and the second pattern are overlapped to form the rich and various projection patterns, so that the visual effect of the user is improved and the user experience is improved.

Further, since the first light emitting module 10 includes the first light source 101, the rotation mechanism 102 and the diffraction grating 103, the diffraction grating 103 is disposed on the rotation mechanism 102 and is located on the light path of the light emitted by the first light source 101, the number of the diffraction gratings 103 is one, and the diffraction grating 103 can rotate around the central axis O under the driving of the rotation mechanism 102, so that the included angle between the diffraction grating 103 and the light path of the light emitted by the first light source 101 is changed, and further the outgoing light can form a movable first pattern on the receiving surface after being emitted through the diffraction grating 103. With the above arrangement, the rotation mechanism 102 can make the first pattern move on the receiving surface by driving the single diffraction grating 103 to rotate, and simultaneously produce the on-off variation similar to the starry sky breathing effect, which can enhance the dynamic effect of the projection pattern, thereby further improving the diversity of the projection pattern. In addition, since only a single diffraction grating 103 is provided on the rotation mechanism 102, the volume and weight of the carrier (i.e., the rotation member 1021) of the diffraction grating 103 can be reduced, thereby facilitating the simplification of the structure, the reduction of the volume, and the realization of the weight reduction of the projection imaging apparatus 100.

Referring to fig. 9, an embodiment of the present application further provides a lamp 200, which includes the projection imaging apparatus 100 and a circuit board 210, wherein the projection imaging apparatus 100 is electrically connected to the circuit board 210. The lamp 200 further comprises a housing 21, a mounting cavity 23 is arranged in the housing 21, a light outlet 22 is formed in the side wall of the housing 21, the light outlet 22 is communicated with the mounting cavity 23, the projection imaging device 100 and the circuit board 210 are arranged in the mounting cavity 23, and light emitted by the projection imaging device 100 can be emitted through the light outlet 22. The lamp 200 can provide the projection patterns with changeable patterns for the user, and the projection patterns can be dynamically changed, so that the visual effect of the user is greatly improved, and the user experience is effectively improved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting. Although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents. Such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. The projection imaging device is characterized by comprising a first light emitting module and a base, wherein the first light emitting module is arranged on the base; the first light emitting module is used for emitting light rays to the receiving surface so as to form a first pattern on the receiving surface;

the first light emitting module includes:

a first light source for generating outgoing light;

the rotating mechanism is arranged at intervals with the first light source;

the diffraction grating is arranged on the light path of the emergent light, the number of the diffraction gratings is one, the diffraction gratings rotate around the central axis under the drive of the rotating mechanism, the diffraction gratings coincide with the central axis, the diffraction gratings are arranged at the central position of the rotating mechanism, the light path of the emergent light intersects with the central axis, so that the central axis always passes through the light path of the emergent light, and the diffraction gratings are always positioned on the light path of the emergent light in the rotating process; and when the diffraction grating rotates, an included angle between the diffraction grating and the light path of the emergent light is changed, so that the emergent light is subjected to dynamic display effect through the first pattern formed after the emergent light is emitted through the diffraction grating.

2. The projection imaging apparatus of claim 1, wherein the rotation mechanism comprises a rotation member rotatably disposed to the base, the diffraction grating being mounted to the rotation member.

3. The projection imaging apparatus according to claim 2, wherein the rotation mechanism further comprises a rotation driving member provided to the base, the rotation member being connected to an output end of the rotation driving member, the rotation member being rotated about the central axis by the rotation driving member.

4. The projection imaging apparatus of claim 2, further comprising a rotational drive source and a transmission, the rotational drive source mounted to the base;

the rotating piece is connected with the rotary driving source through the transmission piece so as to rotate around the central axis under the drive of the rotary driving source; the diffraction grating is arranged on the transmission piece.

5. The projection imaging apparatus according to claim 4, wherein the transmission member is a worm, the rotation member is a cylindrical gear, the cylindrical gear is engaged with the worm, and the diffraction grating is provided on an end face of the cylindrical gear; or,

the transmission piece is a rack, the rotation piece is a cylindrical gear, the cylindrical gear is meshed with the rack, and the diffraction grating is arranged on the end face of the cylindrical gear.

6. The projection imaging apparatus according to claim 4, wherein the rotation driving source and the rotation mechanism are respectively located at opposite sides of the base, and the transmission member is disposed through the base and is in transmission connection with the rotation member.

7. The projection imaging apparatus according to claim 2, wherein the number of the rotation mechanisms and the number of the first light sources are plural, the plural rotation mechanisms are sequentially arranged on the base at intervals around a predetermined center, and each rotation mechanism is provided with one diffraction grating;

the plurality of rotating mechanisms and the plurality of first light sources are arranged in a one-to-one correspondence mode, and emergent light of each first light source is emitted to a diffraction grating on the corresponding rotating mechanism.

8. The projection imaging apparatus according to any one of claims 1 to 7, further comprising a second light emitting module adapted to emit light to the receiving surface to form a second pattern on the receiving surface, the first pattern being different from the second pattern in style, the first pattern and the second pattern being superimposed on the receiving surface to constitute a projection pattern.

9. A light fixture, comprising:

a circuit board; and

the projection imaging apparatus of any of claims 1 to 8, electrically connected to the circuit board.