Projection device and lamp

Abstract

The utility model provides a projection device and a lamp, and relates to the technical field of projection imaging. The projection device comprises a plurality of light source assemblies, a plurality of pattern gratings and a beam splitting element. The light source assemblies are used for generating incident light, the pattern gratings and the light source assemblies are arranged in a one-to-one correspondence mode, and the pattern gratings are arranged on light paths formed by the corresponding light source assemblies. The beam splitting elements are arranged on a plurality of light paths formed by the plurality of light source assemblies, and at least part of the structure of each pattern grating is located between the beam splitting elements and the corresponding light source assemblies, so that light rays generated by the plurality of light source assemblies are emitted through the corresponding pattern gratings and then are emitted to the projection receiving surface through the beam splitting elements to form a plurality of projection patterns. According to the projection device, a plurality of projection patterns are formed on the projection receiving surface under the condition that only one beam splitting element is arranged, so that the watching experience of a user is enriched.

Description

Technical Field

[0001] This application relates to the field of projection imaging technology, and particularly to a projection device and a lamp. Background Art

[0002] When the existing projection device presents multiple projection images on the projection surface, a beam splitting grating and a pattern grating are often integrally formed into a beam splitting element, and a plurality of beam splitting elements are arranged in one-to-one correspondence with a plurality of light sources. Each beam splitting element forms a projection pattern in an array on the projection surface, and a plurality of beam splitting elements can form a plurality of projection patterns on the projection surface. In the above solution, it is possible to form a plurality of projection patterns on the projection surface, but it is necessary to be equipped with a plurality of beam splitting elements and a plurality of light sources. Each beam splitting element is arranged on the optical path formed by the corresponding light source, so that the space volume occupied by the projection device is relatively large and the production cost is relatively high. Summary of the Utility Model

[0003] In view of this, the embodiments of this application provide a projection device and a lamp for solving the above technical problems.

[0004] According to the first aspect of this application, the embodiments of this application provide a projection device, which includes a plurality of light source components, a plurality of pattern gratings, and a beam splitting element. The plurality of light source components are used to generate incident light. The plurality of pattern gratings are arranged in one-to-one correspondence with the plurality of light source components, and the pattern gratings are arranged on the optical paths formed by the corresponding light source components. The beam splitting element is arranged on the plurality of optical paths formed by the plurality of light source components. At least part of the structure of each pattern grating is located between the corresponding light source component and the beam splitting element, so that after the light generated by the plurality of light source components exits through the corresponding pattern grating, it then passes through the beam splitting element and exits to the projection receiving surface to form a plurality of projection patterns.

[0005] Among them, in some embodiments, the projection device further includes an adjustment mechanism. Each pattern grating is connected to the adjustment mechanism and rotates relative to the corresponding light source component around its respective rotation center under the drive of the adjustment mechanism. The light source component and the rotation center of the corresponding pattern grating are spaced apart.

[0006] Among them, in some embodiments, each pattern grating is provided with a plurality of pattern areas, and the plurality of pattern areas of each pattern grating are arranged in sequence around the rotation center.

[0007] Among them, in some embodiments, the adjustment mechanism includes a plurality of first driving members. The plurality of first driving members are connected to the plurality of pattern gratings in one-to-one correspondence, and each first driving member is used to drive the corresponding pattern grating to rotate.

[0008] Among them, in some embodiments, the adjustment mechanism includes a first driving member and a plurality of transmission components. The plurality of transmission components are provided corresponding to the plurality of pattern gratings one by one, and are respectively connected between the corresponding pattern grating and the first driving member, so that the first driving member drives the plurality of transmission components to drive the plurality of pattern gratings to rotate.

[0009] Among them, in some embodiments, the projection device further includes a driving mechanism. The driving mechanism includes a second driving member and a transmission member. The transmission member is connected between the second driving member and the beam splitting element. The second driving member drives the transmission member to drive the beam splitting element to rotate, so that the projection pattern moves on the imaging receiving surface.

[0010] Among them, in some embodiments, at least one of the plurality of pattern gratings is an inclined pattern grating, and the plane where the inclined pattern grating is located is not parallel to the plane where the beam splitting element is located.

[0011] Among them, in some embodiments, the inclined pattern grating has a first side relatively close to the beam splitting element and a second side relatively far from the beam splitting element, and the distance between the first side and the plane where the beam splitting element is located is less than the distance between the second side and the plane where the beam splitting element is located.

[0012] Among them, in some embodiments, the color of at least any one of the incident light rays formed by the plurality of light source components is different from the color of the incident light rays of other light source components, and the incident light rays formed by the plurality of light source components form an array pattern via the beam splitting element.

[0013] According to the second aspect of the present application, an embodiment of the present application provides a lamp, which includes a circuit board and the projection device of any one of the above. The projection device is electrically connected to the circuit board.

[0014] Compared with the prior art, the present embodiment provides a projection device, which is used to form a plurality of projection patterns on the projection receiving surface. Specifically, the projection device includes a plurality of light source components, a plurality of pattern gratings, and a beam splitting element. The incident light rays of each light source component are emitted to the corresponding pattern grating to form outgoing light rays carrying pattern information. The outgoing light rays are emitted from the beam splitting element to the projection receiving surface to form a projection effect with a plurality of projection patterns distributed, which can improve the user's visual experience. Further, the beam splitting element is arranged on the optical path of the incident light rays generated by the plurality of light source modules, that is, only one beam splitting element needs to be arranged to split the incident light rays generated by the plurality of light source modules at the same time. On the one hand, the setting of the beam splitting element can be reduced, thereby reducing the production cost. On the other hand, the volume of the lamp can be reduced under the condition of meeting the multi-pattern projection, which is beneficial to the development of the miniaturization of the lamp. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of this application, the following will briefly introduce the accompanying drawings required for the implementation. Obviously, the accompanying drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of a lamp provided by an embodiment of this application.

[0017] Figure 2 It is a schematic structural diagram of a projection device applied to a lamp provided by an embodiment of this application.

[0018] Figure 3 is Figure 2 An exploded schematic structural diagram of the projection device shown.

[0019] Figure 4 is Figure 2 A top view schematic diagram of the projection device shown.

[0020] Figure 5 is Figure 2 A front view schematic diagram of the projection device shown. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, rather than all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0022] It should be noted that when an element / component is referred to as being "fixed to" another element / component, it can be directly on the other element / component or there can also be a middle element / component. When an element / component is considered to be "connected" to another element / component, it can be directly connected to the other element / component or there may be a middle element / component at the same time; at the same time, when an element / component is considered to be "connected" to another element / component, it can be integrally formed and connected or assembled and connected to the other element / component. When an element / component is considered to be "disposed on" another element / component, it can be directly disposed on the other element / component or there may be a middle element / component at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figures 1 to 3 , an embodiment of the present application provides a projection device 100. The projection device 100 includes a plurality of light source components 10, a plurality of pattern gratings 20, and a beam splitting element 30. The plurality of pattern gratings 20 are disposed on the optical paths formed by the corresponding light source components 10. The incident light generated by each light source component 10 forms an outgoing light carrying pattern information after passing through the corresponding pattern grating 20. The outgoing light then forms a plurality of array projection patterns on the projection receiving surface via the beam splitting element 30, thereby improving the user's viewing experience. Specifically, the array projection pattern can be a circular pattern or a linear pattern. The projection receiving surface is a plane for receiving and displaying the projected projection pattern, and it can include reflective parts such as the ground, wall, ceiling, etc. The projection device can be applied to a projection lamp. According to different specified patterns, the projection device can be used for a starry sky projection device, an advertising projection device, a LOGO projection device, etc. That is, the projection lamp can include a starry sky projection lamp, an advertising projection lamp, a LOGO projection lamp, etc.

[0025] An embodiment of the present application further provides a lamp 200 having the projection device 100. The lamp 200 includes a circuit board 210 and the projection device 100. The projection device 100 is electrically connected to the circuit board 210. In the embodiment of the present application, the circuit board 210 may include a control module, and the control module may be a control chip. In one aspect, the control module is electrically connected to the beam splitting element 30 or the plurality of pattern gratings 20 for controlling the beam splitting element 30 or the pattern grating 20 to rotate, thereby controlling the movement of the projection pattern on the projection receiving surface. In the embodiment of the present application, the circuit board 210 may further include a power module, and the power module is connected to the plurality of light source components 10 for supplying electrical energy to the plurality of light source components 10.

[0026] The lighting fixture 200 may further include a housing 220. An accommodation space 2201 is provided inside the housing 220 and is used to accommodate the projection device 100, the circuit board 210, or other components, so as to protect and accommodate the projection device 10 and the circuit board 210 or other components. In some embodiments, the housing 220 is provided with a light outlet 2202. The light outlet 2202 communicates the accommodation space 2201 with the outside for the emitted light to exit from the housing 220. Specifically, the light outlet 2202 may be arranged opposite to the projection device 100, and the light emitted by the projection device 100 can be projected onto the projection receiving surface through the light outlet 2202 on the housing 220.

[0027] Please refer to Figure 2 and Figure 3 In an embodiment provided by the present application, the projection device 100 includes a plurality of light source components 10, a plurality of pattern gratings 20, and a beam splitting element 30. The plurality of light source components 10 are used to generate incident light. The plurality of pattern gratings 20 are arranged in one-to-one correspondence with the plurality of light source components 10, and the pattern grating 20 is arranged on the optical path formed by the corresponding light source component 10. The beam splitting element 30 is arranged on the plurality of optical paths formed by the plurality of light source components 10. At least a part of the structure of each pattern grating 20 is located between the corresponding light source component 10 and the beam splitting element 30, so that the light generated by the plurality of light source components 10 exits through the corresponding pattern grating 20 and then passes through the beam splitting element 30 and exits to the projection receiving surface to form a plurality of projection patterns. Specifically, the incident light of each light source component 10 forms an emitted light carrying pattern information after exiting to the corresponding pattern grating 20, and the emitted light exits from the beam splitting element 30 to the projection receiving surface to form a projection effect with a plurality of projection patterns distributed, which can improve the user's visual experience. Further, the beam splitting element 30 is arranged on the optical path of the incident light generated by the plurality of light source components 10, that is, only one beam splitting element 30 needs to be arranged to split the incident light generated by the plurality of light source components 10 at the same time. On the one hand, the setting of the beam splitting element 30 can be reduced, thereby reducing the production cost; on the other hand, the volume of the lighting fixture 100 can be reduced under the condition of meeting the multi-pattern projection, which is beneficial to the development of the small volume of the lighting fixture 100.

[0028] Next, each component of the optical device and the specific structure of each component will be introduced one by one.

[0029] Please refer to Figure 3, in this embodiment, the number of light source components 10 is multiple. The multiple light source components 10 are electrically connected to the circuit board 210 and are used to generate incident light. Specifically, the light source components 10 are detachably connected to the circuit board 210, which is convenient for the maintenance and replacement of the light source components 10. It can be understood that different outgoing lights among the multiple outgoing lights formed by the multiple light source components 10 can carry different pattern information. In this embodiment, the light source component 10 includes a light source 101, and the light source 101 is a coherent light source 101. The light source 101 can be a laser generator, that is, the incident light is laser light. Specifically, the light source 101 can be a single-wavelength monochromatic laser generator. For example, the light source 101 can be a green laser generator with a wavelength of 532 nm, or a red laser generator with a wavelength of 630 nm, etc.; it can also be a full-color laser generator (i.e., red, green, and blue), or a tunable broadband laser generator, and the tunable broadband laser generator can generate and emit laser light with a specified wavelength. As an example, the light source 101 is a monochromatic laser generator. On the one hand, monochromatic laser light is not easily prone to speckle phenomenon, and the formed projection imaging is relatively clear, the user's viewing effect is better, and it can reduce the damage to the eyes to a certain extent. On the other hand, the luminous efficiency of monochromatic laser light is relatively high, and the monochromatic laser projection industry chain is complete and relatively mature in development, and the finished product price is relatively low compared with other laser light sources 101. Further, the service life of the laser light source 101 is longer, reducing the frequency of replacement of the light source 101 and thus reducing the use cost.

[0030] In some other embodiments, the color of at least any one of the incident lights formed by the multiple light source components 10 is different from the color of the incident lights of other light source components 10. As an example, the color of the incident light generated by one of the light source components 10 is green, and the incident light can present a green projection pattern on the projection receiving surface. And the colors of the incident lights generated by other light source components 10 can be blue, red or other colors, so as to be able to form projection patterns of multiple colors on the projection receiving surface, which can improve the richness of the projection screen and thus improve the user's experience.

[0031] In this embodiment, multiple pattern gratings 20 are provided in one-to-one correspondence with multiple light source components 10, and the multiple pattern gratings 20 are respectively arranged on the optical paths formed by the corresponding light source components 10. The pattern grating 20 is a grating with a specified pattern engraved on its surface. In this embodiment, the specified pattern can be geometric patterns, starry sky patterns, etc. When the incident light generated by each light source component 10 passes through the corresponding pattern grating 20 and then exits through the same beam splitting element 30, the shape of the diffraction spot in the generated outgoing light is the specified pattern on each pattern grating 20. For example, the shape of the diffraction spot is a geometric shape, that is, the pattern of the star points formed by the diffraction spot on the projection receiving surface is the corresponding geometric pattern, creating a star point light atmosphere of various shapes, thereby enhancing the user's viewing experience.

[0032] Please refer to Figure 4 , in this embodiment, each pattern grating 20 is further provided with multiple pattern regions 21, and the multiple pattern regions 21 are arranged around the corresponding rotation center 22. Specifically, each pattern grating 20 can rotate based on the corresponding rotation center 22. The rotation center 22 can be the geometric center of the pattern grating 20 or a region that does not coincide with the geometric center. This embodiment does not limit this. The multiple pattern regions 21 can be multiple sector regions, and the multiple sector regions are arranged around the outer periphery of the rotation center 22. The incident light passing through different sector regions can generate one or more beams of light carrying pattern information with different distributions, and the light is projected onto the projection receiving surface through the beam splitting element 30 to form corresponding projection patterns. However, this embodiment is not limited to this. The pattern region 21 can also be other shaped regions, such as a ring-shaped region, a circular region, etc., which are a set of one or more of them, and multiple patterns are selected according to the region distribution and area size to form multiple projection patterns.

[0033] Please refer to again Figure 3 , in this embodiment, the projection device 100 further includes an adjustment mechanism 40. The adjustment mechanism 40 is connected to the multiple pattern gratings 20 and is used to drive the multiple pattern gratings 20 to rotate relative to the corresponding light source components 10 around their respective rotation centers 22, so that different pattern regions 21 on each pattern grating 20 can be rotated to the optical paths formed by the light source components 10.

[0034] As an example, the adjusting mechanism 40 may include a plurality of first driving members 41. The plurality of first driving members 41 are arranged in one-to-one correspondence with the plurality of pattern gratings 20, and each first driving member 41 is used to drive the corresponding pattern grating 20 to rotate. Specifically, one end of the plurality of first driving members 41 is fixed to the mounting bracket 60 and connected to the circuit board 210, so as to realize the electrical connection between the adjusting mechanism 40 and the external circuit. By separately adjusting the output power of the first driving member 41, the rotation speed of the pattern grating 20 can be individually controlled, so that the movement speed or the change speed of the projection pattern on the projection receiving surface can be respectively controlled, and the dynamic effect of the projection imaging required by the user can be realized, thereby forming a novel and realistic projection effect. The first driving member 41 may be a driving motor or a driving device such as a rotary servo, and the present embodiment does not limit this.

[0035] As another example, the adjusting mechanism 40 may include a first driving member 41 and a plurality of transmission components (not shown in the figure). The plurality of transmission components are arranged in one-to-one correspondence with the plurality of pattern gratings 20, and are respectively connected between the corresponding pattern gratings 20 and the first driving member 41. The first driving member 41 is used to drive the plurality of transmission components to drive the plurality of pattern gratings 20 to rotate. As an example, the transmission components are all gears. The gear includes an output shaft. One end of the output shaft of one of the gears is connected to the first driving member 41, and the other end is connected to another gear. The adjacent gears are meshed with each other and are in transmission connection with the pattern grating 20. When the first driving member 41 works, the gear connected to the first driving member 41 will rotate, so as to drive other meshed gears to rotate. At this time, the plurality of pattern gratings 20 rotate synchronously or in a linkage manner, so that different pattern areas 21 are located on the optical paths formed by the corresponding light source components 10. In some embodiments, the transmission components may further include one or more of the following transmissions: chain transmission, gear transmission, belt transmission, etc. The present embodiment does not limit the transmission form of the transmission components. It can be understood that the rotation speed of the plurality of pattern gratings 20 can be controlled by controlling the driving power of the first driving member 41.

[0036] Furthermore, through the connection between the gears and the connection manner between the gears and the first driving member 41, the space volume occupied by the projection device 100 can be reduced, and the production cost can be saved. At the same time, the plurality of projection patterns after the plurality of pattern gratings 20 are split by the beam splitting element 30 can move synchronously on the projection receiving surface, forming the effect of linkage projection.

[0037] Please refer to Figure 3 and Figure 4, in this embodiment, the beam splitting element 30 is disposed on the plurality of optical paths formed by the plurality of light source assemblies 10. It is used to split the incident light formed by the plurality of light source assemblies 10 and form outgoing light, and the outgoing light forms a plurality of projection patterns on the projection receiving surface. The beam splitting element 30 can be a beam splitting grating, a beam splitting prism, a beam splitting film, etc., and this embodiment does not limit this. Specifically, the beam splitting element 30 is disposed at intervals from the plurality of pattern gratings 20, and at least a part of the structure of each pattern grating 20 is located between the beam splitting element 30 and the corresponding light source assembly 10. That is, when the beam splitting element 30 projects toward the plane where the plurality of pattern gratings 20 are located, the projected part at least partially covers any one of the pattern gratings 20. After the light generated by the plurality of light source assemblies 10 exits through the corresponding pattern grating 20, it then passes through the beam splitting element 30 and exits to the projection receiving surface to form a plurality of projection patterns. Therefore, under the condition of only providing one beam splitting element 30, the projection effect of forming a plurality of projection pattern distributions on the projection receiving surface can be achieved, which can improve the user's visual experience. At the same time, only providing one beam splitting element 30 can reduce the spatial volume of the lamp 200, thereby reducing the production cost.

[0038] Please refer to Figure 3 , in this embodiment, the projection device 100 further includes a driving mechanism 50. The driving mechanism 50 is connected to the beam splitting element 30 and is used to drive the beam splitting element 30 to rotate. Specifically, the driving mechanism 50 includes a second driving member 51 and a transmission member 52. The transmission member 52 is connected between the second driving member 51 and the beam splitting element 30. The transmission member 52 can be a rotating shaft 521, a gear 522, or a combination of the two. The second driving member 51 can be a driving motor or a rotary servo. As an example, the transmission member 52 is a rotating shaft 521, and the second driving member 51 is a driving motor. One end of the rotating shaft 521 is connected to the beam splitting element 30, and the other end is coaxially arranged with the output shaft of the driving motor. When the driving motor operates, the driving motor controls the rotating shaft 521 to rotate. At this time, the beam splitting element 30 also moves with the rotation of the shaft 521. At the same time, the output power of the driving motor can be controlled to control the movement speed of the beam splitting element 30, and the light exiting through the beam splitting element 30 can form a projection moving light effect with different pattern change speeds on the projection receiving surface.

[0039] As another example, a plurality of gears 522 are stacked and meshed with each other to form a transmission member 52. One end of one of the gears 522 is connected to the second driving member 51, one of the gears 522 is connected to the beam splitting element 30, and adjacent gears 522 are meshed with each other and are in transmission connection with the pattern grating 20. When the second driving member 51 operates, the gear 522 connected to the second driving member 51 rotates, thereby driving the other meshed gears 522 to rotate, so as to achieve the effect of controlling the rotation of the beam splitting element 30. In this embodiment, a plurality of meshed gears 522 and a rotating shaft 521 are combined to form a transmission member 52. One of the gears 522 is connected to the second driving member 51, and the other gear 522 is connected to one end of the rotating shaft 521, and the other end of the rotating shaft 521 is connected to the beam splitting element. When the second driving member 51 operates, each gear 522 rotates, thereby driving the rotating shaft 521 to rotate, and further enabling the beam splitting element to rotate. The gears 522 and the rotating shaft 521 simultaneously serve as the transmission member 52, which can reduce the number of pure gear 522 transmissions, save space volume, and improve the stability of the projection device 100.

[0040] It should be noted that, in order to further improve the stability of the lamp 200, in this embodiment, the projection device 100 further includes a mounting bracket 60. The mounting bracket 60 is used to mount the adjusting mechanism 40 and the driving mechanism 50. As an example, the mounting bracket 60 is supported inside the housing 220. The mounting bracket 60 is divided into a first mounting bracket 61 and a second mounting bracket 62, and the first mounting bracket 61 and the second mounting bracket 62 are stacked. The first mounting bracket 61 is used to mount the adjusting mechanism 40. Specifically, it is provided with a plurality of support columns and connection holes, which can make the components in the adjusting mechanism 40 arranged compactly and reasonably. The second mounting bracket 62 is used to mount the driving mechanism 50 and plays a certain protective role for the driving mechanism 50. It can be understood that the first mounting bracket 61 is detachably connected to the second mounting bracket 62, and the specific connection method can be a plug-in connection, which is convenient for installation and disassembly. The setting of the mounting bracket 60 makes the structural layout of the lamp 200 more compact and reasonable, and is convenient for maintenance while having effects such as heat dissipation.

[0041] In this embodiment, since the beam splitting element 30 is arranged on a plurality of pattern gratings 20 and a plurality of optical paths for irradiating the pattern gratings 20, in order to avoid that the projection patterns on the projection receiving surface are prone to multiple overlapping areas, reducing the demonstration effect and affecting the user's viewing experience. At least part of the incident light can have an incident angle with the plane where the beam splitting element 30 is located, where the beam splitting element 30 can be plate-shaped.

[0042] Please refer to Figure 5, as an example, at least one of the plurality of pattern gratings 20 is an inclined pattern grating 20, and the plane where the inclined pattern grating 20 is located is not parallel to the plane where the beam splitting element 30 is located. Specifically, the inclined pattern grating 20 has a first side 23 and a second side 24. The first side 23 is the side closer to the beam splitting element 30, and the second side 24 is the side farther from the beam splitting element 30. The distance between the first side 23 and the plane where the beam splitting element 30 is located is less than the distance between the second side 24 and the plane where the beam splitting element 30 is located. The outgoing path of the incident light after passing through the inclined pattern grating 20 and exiting from the beam splitting element 30 to the projection receiving surface is different from that of the other pattern gratings 20. The projected image of the inclined pattern grating 20 on the projection receiving surface can be staggered from other projected images, making the projection screen more coordinated, reducing the phenomenon of overlap of each projected image, improving the projection visibility, and forming a novel and rich projection effect. At the same time, the inclined pattern grating 20 can make the overall structure of the projection device 100 more compact. It can be understood that each pattern grating 20 can also be arranged parallel to the plane where the beam splitting element 30 is located.

[0043] It should be noted that the angle range of the angle between the inclined pattern grating 20 and the plane where the beam splitting element 30 is located is 5° to 45° (including the endpoints). For example, the value of the angle between the inclined pattern grating 20 and the plane where the beam splitting element 30 is located can be 5°, 10°, 15°, 45°, etc. It should be noted that the value range of the angle between the inclined pattern grating 20 and the beam splitting element 30 can also be other angles, which are not limited in this embodiment.

[0044] In another embodiment, the phenomenon of overlap of the projection patterns can also be reduced by adjusting the inclination angle of the beam splitting element 30. Specifically, the inclination angle of the beam splitting element 30 relative to the incident light can be manually adjusted or controlled by the device. At least part of the incident light enters the beam splitting grating through a shorter path, so as to form staggered projection patterns on the projection receiving surface, thereby reducing the overlapping area between each projection pattern.

[0045] It should be noted that the light source components 10 in the above embodiments may be inclined relative to the beam splitting element 30, and the inclination angles between the inclined light source components 10 may be the same or different. As an example, each light source component 10 is inclined relative to the beam splitting element 30, and the inclination angle and direction can refer to the above-mentioned inclined pattern grating 20. Setting the inclined light source components 10 can eliminate the coherence between the incident light rays, improve the randomness of the light rays incident on the pattern grating 20, and cover the pattern area 21 of the pattern grating 20 as much as possible, so as to form a variety of projection patterns on the projection receiving surface. It can be understood that the light source components 10 in the above embodiments may also be arranged parallel to the beam splitting element 30. In order to reduce the overlap between the projection patterns, the distance between the parallel light source components 10 is preferably large, and the volume of the corresponding beam splitting element 30 is large, and the production cost is also correspondingly increased.

[0046] The technical solution provided by the embodiments of the present application forms outgoing light rays carrying a variety of pattern information after each light source component 10 passes through different pattern gratings 20 by providing a plurality of light source components 10 capable of generating outgoing light rays of different colors. The outgoing light rays are then emitted through the beam splitting element 30 to form a variety of colors and a variety of patterns on the projection receiving surface. On the one hand, it can improve the user's visual experience and form a rich projection light effect; on the other hand, it can reduce the setting of projection elements and reduce the production cost.

[0047] In summary, the embodiments of the present application provide a projection device 100, which includes a plurality of light source components 10, a plurality of pattern gratings 20, and a beam splitting element 30. The plurality of light source components 10 are used to generate incident light rays. The plurality of pattern gratings 20 are arranged in one-to-one correspondence with the plurality of light source components 10, and the pattern gratings 20 are arranged on the optical paths formed by the corresponding light source components 10. The beam splitting element 30 is arranged on the plurality of optical paths formed by the plurality of light source components 10. At least part of the structure of each pattern grating 20 is located between the beam splitting element 30 and the corresponding light source component 10, so that the light rays generated by the plurality of light source components 10 pass through the corresponding pattern gratings 20 and then transmit through the beam splitting element 30 to be emitted to the projection receiving surface to form a plurality of projection patterns. Specifically, the incident light rays of each light source component 10 are emitted to the corresponding pattern grating 20 to form outgoing light rays carrying pattern information, and the outgoing light rays are emitted from the beam splitting element 30 to the projection receiving surface to form a projection effect with a plurality of projection patterns distributed, which can improve the user's visual experience. Further, the beam splitting element 30 is arranged on the optical paths of the incident light rays generated by the plurality of light source components 10, that is, only one beam splitting element 30 needs to be set to split the incident light rays generated by the plurality of light source components 10 at the same time. On the one hand, it can reduce the setting of the beam splitting element 30, thereby reducing the production cost. On the other hand, it can reduce the volume of the lamp 200 under the condition of meeting the multi-pattern projection, which is beneficial to the development of the small volume of the lamp 200.

[0048] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; 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 various embodiments of this application.

Claims

1. A projection device, characterized in that: include: A plurality of light source assemblies, wherein the plurality of light source assemblies are used to generate incident light; A plurality of pattern gratings, wherein the plurality of pattern gratings are arranged in one-to-one correspondence with the plurality of light source components, and the pattern gratings are arranged on the light paths formed by the corresponding light source components; as well as A beam splitting element is arranged on multiple optical paths formed by multiple light source components, and at least a part of the structure of each pattern grating is located between the corresponding light source component and the beam splitting element, so that the light generated by the multiple light source components is emitted through the corresponding pattern grating, and then transmitted through the beam splitting element to be emitted to the projection receiving surface to form multiple projection patterns.

2. The projection device according to claim 1, characterized in that: The projection device also includes an adjustment mechanism, each of the pattern gratings is connected to the adjustment mechanism and rotates around its own rotation center relative to the corresponding light source assembly under the drive of the adjustment mechanism, and the light source assembly is spaced apart from the rotation center of the corresponding pattern grating.

3. The projection device according to claim 2, characterized in that: Each of the pattern gratings is provided with a plurality of pattern areas, and the plurality of pattern areas of each of the pattern gratings are sequentially arranged around the rotation center.

4. The projection device according to claim 2, characterized in that: The adjustment mechanism includes a plurality of first driving members, and the plurality of first driving members are connected to the plurality of pattern gratings in a one-to-one correspondence, and each of the first driving members is used to drive the corresponding pattern grating to rotate.

5. The projection device according to claim 2, characterized in that: The adjustment mechanism includes a first driving member and a plurality of transmission components. The plurality of transmission components are arranged in one-to-one correspondence with the plurality of pattern gratings and are respectively connected between the corresponding pattern gratings and the first driving member, so that the first driving member drives the plurality of transmission components to drive the plurality of pattern gratings to rotate.

6. The projection device according to claim 1, characterized in that: The projection device also includes a driving mechanism, which includes a second driving member and a transmission member, wherein the transmission member is connected between the second driving member and the beam splitting element, and the second driving member drives the transmission member to drive the beam splitting element to rotate, so that the projection pattern moves on the imaging receiving surface.

7. The projection device according to any one of claims 1 to 6, characterized in that: There is at least one inclined pattern grating among the plurality of pattern gratings, and a plane where the inclined pattern grating is located is not parallel to a plane where the beam splitting element is located.

8. The projection device according to claim 7, characterized in that: The inclined pattern grating has a first side relatively close to the beam splitting element and a second side relatively far from the beam splitting element, and a distance between the first side and a plane where the beam splitting element is located is smaller than a distance between the second side and the plane where the beam splitting element is located.

9. The projection device according to any one of claims 1 to 6, characterized in that: The color of at least any incident light ray among the incident lights formed by the multiple light source assemblies is different from the colors of the incident lights of other light source assemblies; the incident lights formed by the multiple light source assemblies form an array pattern through the beam splitting element.

10. A lamp, characterized in that: include: Circuit boards; as well as The projection device according to any one of claims 1 to 9, wherein the projection device is electrically connected to the circuit board.

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