CN113357574B - Star projecting lamp - Google Patents
Star projecting lamp Download PDFInfo
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- CN113357574B CN113357574B CN202110745614.2A CN202110745614A CN113357574B CN 113357574 B CN113357574 B CN 113357574B CN 202110745614 A CN202110745614 A CN 202110745614A CN 113357574 B CN113357574 B CN 113357574B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/30—Pivoted housings or frames
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/30—Semiconductor lasers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
Abstract
The embodiment of the application provides a star-sky projector, relates to lamps and lanterns technical field. The starry sky projector of the embodiment of the application comprises a shell, a first projection assembly and a power device. The shell is provided with a first through hole and a second through hole which are distributed at intervals, the first through hole is provided with a first optical processing device, and the second through hole is provided with a second optical processing device. The light beam emitted by the first light source device forms a first light beam and a second light beam through the beam splitter, and the first light beam passes through the first through hole and is emitted to the first optical processing device to form a first pattern. The rotating piece is provided with a light hole, and the light hole is positioned between the second through hole and the beam splitter. The second light beam periodically passes through the light transmission hole and the second through hole and is directed to the second optical processing device to periodically form a second pattern. The starry sky projector can reduce the loss of light when passing through the optical processing device, and improves the light-emitting rate of the starry sky projector.
Description
Technical Field
The application relates to the technical field of lamps and lanterns, especially, relate to a sky projector lamp.
Background
With the pursuit of people for life quality gradually increasing, lamps capable of creating various atmospheres are widely used in life. For example, a starry sky projector can project images of starry sky and night sky on a wall or a ceiling of a room, thereby creating a wonderful and romantic atmosphere in a room.
In the related art, a star field projector generally includes a housing, a projection assembly disposed in the housing, and a driving assembly. The projection component comprises a light source, a static optical processing device and a dynamic optical processing device, and star point patterns are arranged on the static optical processing device and the dynamic optical processing device. The light beam emitted by the light source sequentially passes through the static optical processing device and the dynamic optical processing device, the star point patterns on the static optical processing device and the dynamic optical processing device are projected outside the shell, and meanwhile, the driving component drives the dynamic optical processing device to rotate so as to enable the star point patterns on the dynamic optical processing device to rotate, so that the star point projection lamp can project the star point patterns combined with static and dynamic states, and a visual perception of movement of the star point is provided for people.
However, in the related art, the light beam emitted by the light source may be refracted and reflected multiple times during the process of sequentially passing through the static optical processing device and the dynamic optical processing device, so that the light beam is lost, and the light output rate of the star-sky light is not high.
Disclosure of Invention
The embodiment of the application provides a star-sky projector, which can reduce light loss and improve the light-emitting rate of the star-sky projector.
The embodiment of the application provides a star-sky projector, which comprises a shell, a first projection assembly and a power device;
the shell is provided with a first through hole and a second through hole which are distributed at intervals, the first through hole is provided with a first optical processing device, and the second through hole is provided with a second optical processing device;
the first projection assembly comprises a first light source device, a beam splitter and a rotating member, wherein the first light source device, the beam splitter and the rotating member are arranged in the shell, and a part of the beam splitter is positioned between the first light source device and the rotating member;
the light beam emitted by the first light source device passes through the beam splitter to form a first light beam and a second light beam, and the first light beam passes through the first through hole to be emitted to the first optical processing device so as to form a first pattern;
the rotating piece is provided with a light hole, and the light hole is positioned between the second through hole and the beam splitter;
the rotating piece is connected with the power device, and the power device drives the rotating piece to rotate, so that the second light beam periodically passes through the light transmission hole and the second through hole and is emitted to the second optical processing device to periodically form a second pattern.
The light beam emitted from the first light source device is split into a first light beam and a second light beam by the beam splitter. The first light beam passes through the first through hole and is directed to the first optical processing device to form a first pattern. When the second light beam is emitted to the second optical processing device, the second light beam is blocked by the rotating piece and cannot be emitted to the second optical processing device, and only when the power device drives the rotating piece to rotate until the light hole is opposite to the second through hole, the second light beam can pass through the light hole and the second through hole and is emitted to the second optical processing device to form a second pattern. In the process, the light holes are periodically opposite to the second through holes along with the rotation of the rotating piece, and the second patterns are also periodically formed. When the first pattern and the second pattern are starlight patterns, the visual effect presented by the first pattern is static starlight, the effect presented by the second pattern is periodically flashing starlight, and the static starlight and the flashing starlight are projected on a wall or a ceiling at the same time so as to form a vivid starlight image.
In this way, the beam emitted by the first means may be split into a first beam directed to the first optical processing device and a second beam directed to the second optical processing device. The two light beams split by the beam splitter are only emitted to one optical processing device, so that the light beams are prevented from being refracted and reflected for many times, the loss of the light beams when the light beams pass through the optical processing device is reduced, and the light-emitting rate of the star-sky projector is improved.
In one possible implementation manner, the starry sky projector provided by the embodiment of the application, the beam splitter comprises a shell, and a beam splitting sheet and a reflecting sheet which are arranged in the shell;
the housing has a first wall and a second wall parallel to each other; the first wall is provided with a light beam inlet which is opposite to the light outlet of the first light source device; the second wall is provided with a first light beam outlet and a second light beam outlet which are distributed at intervals, the first light beam outlet is positioned between the light beam inlet and the first through hole, and the second light beam outlet is opposite to the second through hole;
the beam splitting sheet is positioned between the beam inlet and the first beam outlet, and the beam splitting sheet is inclined towards the side of the first wall where the beam inlet is positioned;
the reflecting sheet is positioned between the first wall and the second beam outlet, and the reflecting sheet is parallel to the beam splitting sheet.
Thus, the light beam emitted by the first light source device is emitted to the beam splitting sheet through the light beam inlet, and the beam splitting sheet splits the light beam into two beams. One of the light beams is transmitted through the beam splitting sheet and is emitted from the first light beam outlet to form a first light beam; the other beam is reflected by the beam splitting sheet, is emitted to the reflecting sheet, is reflected by the reflecting sheet, is emitted to the second beam outlet, and is emitted from the second beam outlet to form a second beam.
In a possible implementation manner, in the star-sky projector provided by the embodiment of the present application, an included angle between the beam splitting piece and a side of the first wall where the beam inlet is located is greater than 0 ° and less than 90 °.
The size of the included angle influences the transmissivity and reflectivity of the beam splitting sheet on the incident light beam, when the included angle is smaller, the transmissivity of the beam splitting sheet on the incident light beam is larger, the reflectivity of the beam splitting sheet on the incident light beam is smaller, and the intensity of the first light beam is larger, and the intensity of the second light beam is smaller; conversely, when the included angle is larger, the smaller the transmittance of the beam splitting sheet to the incident light beam, the larger the reflectance of the beam splitting sheet to the incident light beam, meaning that the smaller the intensity of the first light beam, the larger the intensity of the second light beam.
In a possible implementation manner, the star-shaped projection lamp provided in the embodiment of the present application, the number of the light holes is multiple, and the multiple light holes encircle the center line of the rotating member and are distributed at intervals.
In a possible implementation manner, the star-sky projector provided in the embodiment of the present application, the first light source device is a laser generator, and the first optical processing device and the second optical processing device are both diffraction diaphragms.
In a possible implementation manner, the starry sky projector provided by the embodiment of the application further comprises a second projection assembly, wherein the second projection assembly comprises a second light source device, a third optical processing device, a rotating shaft and a second gear, and the second light source device, the third optical processing device, the rotating shaft and the second gear are arranged in the shell;
the shell is provided with a third through hole, the light outlet of the second light source device is opposite to the third through hole, and part of the third optical processing device is positioned between the light outlet of the second light source device and the third through hole;
one end of the rotating shaft is connected with the third optical processing device, the other end of the rotating shaft is connected with the second gear, the second gear is connected with the power device, and the power device drives the second gear to rotate so as to drive the third optical processing device to rotate;
the light beam emitted by the second light source device is emitted to the rotating third optical processing device so as to form a dynamic third pattern.
The second projection component is used for projecting a star cloud image, and light beams emitted by the second light source are emitted to the third optical processing device through the third through hole to form a third pattern. The power device drives the second gear to rotate so as to drive the third optical processing device to rotate, thereby rotating the third pattern. When the third pattern is a star cloud pattern, the effect of projection onto a wall or ceiling is a dynamic star cloud image.
In one possible implementation manner, the star-sky projector provided in the embodiment of the present application is provided with a light homogenizing lens on the third through hole.
The dodging lens has the function of homogenizing the projected light pattern, and can carry out dodging treatment on the formed third pattern, so that the third pattern can be projected onto a wall or a ceiling more uniformly in a larger area, and a more magnificent star cloud image is presented.
In one possible implementation manner, the star-sky projector provided in the embodiments of the present application is provided with a condensing lens between the second light source device and the third optical processing device.
The condensing lens has the function of converting large-angle light into small-angle light, and can gather light beams emitted by the second light source, so that more light beams can be emitted to the third optical processing device, and the light beam loss is reduced.
In a possible implementation manner, the starry sky projector provided by the embodiment of the application, the power device comprises a motor and a third gear, and the third gear is connected with a motor shaft of the motor; the rotating piece is a first gear, and the third gear is meshed with the first gear and the second gear.
The motor shaft of the motor drives the third gear to rotate, and when the third gear rotates, the first gear and the second gear meshed with the third gear are driven to rotate, so that the light holes which are arranged on the first gear in a surrounding mode are periodically positioned between the second through holes and the second light beam outlets, the second light beam can pass through the light holes and the second through holes and irradiate the second optical processing device, and the effect of flickering of the second pattern is displayed. The rotating speed of the motor determines the period of second pattern flickering, and the faster the rotating speed of the motor is, the shorter the period of second pattern flickering is, and the faster the frequency of second pattern flickering is; conversely, the slower the rotational speed of the motor, the longer the period of the second pattern flicker, and the slower the frequency of the second pattern flicker.
Meanwhile, the second gear drives the third optical processing device to rotate through the rotating shaft, so that the third pattern has a moving effect.
In a possible implementation manner, the starry sky projector provided by the embodiment of the application, the shell comprises a rear cover, a front cover and a side cover, the rear cover is provided with a first notch, the front cover is provided with a second notch, the first notch and the second notch enclose to form a mounting opening, the side cover is mounted on the mounting opening, and the first through hole, the second through hole and the third through hole are positioned on the side cover.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural view of a star-sky projector according to an embodiment of the present application;
FIG. 2 is an exploded schematic view of a star-sky projector according to an embodiment of the present application;
FIG. 3 is an exploded view of a first projection assembly of a star field projector according to an embodiment of the present application;
FIG. 4 is an assembled schematic view of a star-sky projector according to an embodiment of the present application;
FIG. 5 is a schematic view of the optical path of a beam splitter in a star-field projector according to an embodiment of the present application;
fig. 6 is an exploded view of a second projection assembly in a star field projector according to an embodiment of the present application.
Reference numerals illustrate:
10-a housing; 11-a rear cover;
111-a bottom plate; 1111-tendon;
112-a first sidewall; 1121-a first gap;
12-a front cover; 121-top plate;
122-a second sidewall; 1221-a second notch;
13-side covers; 131-a first through hole;
132-a second through hole; 133-a third through hole;
14-a first optical processing device; 15-a second optical processing device;
16-a protective cover; 20-a first projection assembly;
21-a first light source device; 22-beam splitter;
221-a housing; 2211—a first wall;
2211 a-a beam entrance; 2212-a second wall;
2212a—a first beam outlet; 2212 b-a second beam outlet;
222-splitting a beam slice; 223-reflecting sheet;
23-rotating member; 231-light holes;
232-a central aperture; 30-a second projection assembly;
31-a second light source device; 311-circuit board;
312-a light emitting device; 32-a third optical processing device;
33-rotating shaft; 34-a second gear;
40-power plant; 41-an electric motor;
42-a third gear; 50-a dodging lens;
60-condensing lens.
Detailed Description
In the star field light of the related art, since the light beam emitted by the light source needs to pass through the static optical processing device and the dynamic optical processing device in sequence, when the light beam passes through the static optical processing device, a part of the light beam can be reflected or refracted and cannot be correctly emitted to the dynamic optical processing device, so that the light beam is lost; when the other light beams emitted to the movable optical processing device pass through the movable optical processing device, the light beams are reflected or refracted, so that the light beams cannot be emitted correctly by the star-sky projector, the light beams are further lost, and the light-emitting rate of the star-sky projector is low.
Based on this, the embodiment of the application provides a star-light-projection lamp, and a light beam emitted by a light source device of the star-light-projection lamp is split into a first light beam emitted to a first optical processing device and a second light beam emitted to a second optical processing device by a beam splitter. Compared with the related art, the loss of the light beam when passing through the optical processing device is reduced, and the light-emitting rate of the star-sky projector is improved.
The implementation of the examples of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a star-sky projector according to an embodiment of the present application; fig. 2 is an exploded schematic view of a star-sky projector according to an embodiment of the present application.
Referring to fig. 1-2, a star field projector according to an embodiment of the present application includes a housing 10, a first projection assembly 20, and a power unit 40.
The housing 10 has a first through hole 131 and a second through hole 132 that are distributed at intervals, the first through hole 131 is provided with a first optical processing device 14, and the second through hole 132 is provided with a second optical processing device 15. The first projection assembly 20 includes a first light source device 21, a beam splitter 22, and a rotating member 23 disposed within the housing 10, with a portion of the beam splitter 22 positioned between the first light source device 21 and the rotating member 23. The light beam emitted from the first light source device 21 forms a first light beam and a second light beam by the beam splitter 22, and the first light beam is directed to the first optical processing device 14 through the first through hole 131 to form a first pattern. The rotating member 23 has a light hole 231, and the light hole 231 is located between the second through hole 132 and the beam splitter 22. The rotating member 23 is connected to the power device 40, and the power device 40 drives the rotating member 23 to rotate, so that the second light beam periodically passes through the light transmission hole 231 and the second through hole 132 and is directed to the second optical processing device 15 to periodically form a second pattern.
The first projection assembly 20 is configured to project a star field image, and a light beam emitted by the first light source device 21 is split into a first light beam and a second light beam by the beam splitter 22. The first light beam is directed to the first optical processing device 14 through the first through hole 131 to form a first pattern. When the second light beam is emitted to the second optical processing device 15, the second light beam is blocked by the rotating member 23 and cannot be emitted to the second optical processing device 15, and only when the power device 40 drives the rotating member 23 to rotate until the light hole 231 faces the second through hole 132, the second light beam can pass through the light hole 231 and the second through hole 132 and is emitted to the second optical processing device 15 to form a second pattern. In this process, the light holes 231 are periodically opposite to the second through holes 132 as the rotating member 23 rotates, and thus, the second pattern is also periodically formed. When the first pattern and the second pattern are starlight patterns, the visual effect presented by the first pattern is static starlight, the effect presented by the second pattern is periodically flashing starlight, and the static starlight and the flashing starlight are projected on a wall or a ceiling at the same time so as to form a vivid starlight image.
In the star field light of the embodiment of the present application, the beam emitted by the first device may be split into a first beam directed to the first optical processing device 14 and a second beam directed to the second optical processing device 15 by the beam splitter 22. In this way, the two light beams split by the beam splitter 22 are only directed to one optical processing device, multiple refraction and reflection of the light beams are avoided, loss of the light beams when the light beams pass through the optical processing device is reduced, and the light extraction rate of the star field projection lamp is improved.
FIG. 3 is an exploded view of a first projection assembly of a star field projector according to an embodiment of the present application; fig. 4 is an assembly schematic diagram of a star-sky projector according to an embodiment of the present application.
Referring to fig. 2-4, in the embodiment of the present application, the housing 10 includes a rear cover 11, a front cover 12 and a side cover 13, the rear cover 11 has a first notch 1121, the front cover 12 has a second notch 1221, the first notch 1121 and the second notch 1221 enclose to form a mounting opening, the side cover 13 is mounted on the mounting opening, and the first through hole 131, the second through hole 132 and the third through hole 133 are located on the side cover 13.
Specifically, the rear cover 11 includes a circular bottom plate 111 and a first side wall 112 surrounding the periphery of the bottom plate 111, and a space formed by the bottom plate 111 and the first side wall 112 is used for placing various parts of the star-sky projector. The bottom plate 111 has a plurality of ribs 1111 on a surface facing the front cover 12, and the ribs 1111 are combined to form an assembly groove for mounting various components.
The front cover 12 comprises a circular top plate 121 and a second side wall 122 encircling the periphery of the top plate 121, and a space formed by the top plate 121 and the second side wall 122 is used for accommodating various parts of the star-sky projector.
The first notch 1121 extends from the edge of the first side wall 112 toward the bottom plate 111, the second notch 1221 extends from the edge of the second side wall 122 toward the top plate 121, and when the rear cover 11 is connected to the front cover 12, the first notch 1121 aligns with the second notch 1221 to form a mounting opening having the same curvature as the first and second side walls 112, 122.
The side cover 13 is a plate with the bending radian of the mounting opening, and the outer side surface of the side cover 13 is flush with the first side wall 112 and the second side wall 122 so as to ensure the surface of the shell 10 to be smooth and beautiful. The first through hole 131 and the second through hole 132 are positioned on the side cover 13, the first optical processing device 14 and the second optical processing device 15 are connected with the side cover 13, and the first optical processing device 14 covers the first through hole 131; the second optical processing device 15 covers the second through hole 132.
Specifically, the rear cover 11, the front cover 12 and the side cover 13 are all made of plastic materials and are formed by injection molding of thermoplastic plastics or thermosetting plastics.
In the embodiment of the present application, the protective cover 16 is mounted on the side cover 13, and the protective cover 16 covers the first optical processing device 14 and the second optical processing device 15. The protective cover 16 is made of transparent glass or transparent plastic, and serves to protect the first and second optical processing devices 14 and 15 from being damaged by external force.
In the embodiment of the present application, the first light source device 21 is a laser generator, and the first optical processing device 14 and the second optical processing device 15 are both diffraction diaphragms.
Specifically, the laser beam emitted from the laser generator forms two laser beams, i.e., a first beam and a second beam, by the beam splitter 22. The first light beam passes through the first through hole 131 to be directed to the first optical processing device 14, and is diffracted when passing through the first optical processing device 14, so that the first light beam is diffused and forms a scattered light spot, namely a first pattern; the second light beam is directed to the second optical processing device 15 through the second through hole 132, and is diffracted while passing through the second optical processing device 15, so that the second light beam is diffused while forming a scattered spot, i.e., a second pattern. When the first pattern is projected on a wall or a ceiling, the visual effect is a static light spot, and static starlight is simulated. When the second pattern is projected on a wall or a ceiling, the visual effect is that light spots appear periodically, and the twinkling starlight is simulated. The static starlight and the flashing starlight are projected to the wall or the ceiling together to form a realistic starry sky image.
In the embodiment of the application, the laser generator is a semiconductor laser, and may be, for example, a gallium arsenide laser, a cadmium sulfide laser, an indium phosphide laser, a zinc sulfide laser, or the like. The semiconductor laser can continuously emit stable laser outwards, has the advantages of small volume, light weight, low power consumption, long service life and the like, and is suitable for a star-sky projector.
In the embodiment of the application, the diffraction diaphragm is a diffraction optical element (Diffractive Optical Elements, DOE), and diffraction occurs when laser light irradiates on the diffraction diaphragm.
Fig. 5 is a schematic view of an optical path of a beam splitter in the star-field light according to the embodiment of the present application, and referring to fig. 3 to 5, in the embodiment of the present application, the beam splitter 22 includes a housing 221, and a beam splitting sheet 222 and a reflecting sheet 223 disposed in the housing 221. The housing 221 has a first wall 2211 and a second wall 2212 parallel to each other, the first wall 2211 has a light beam inlet 2211a thereon, and the light beam inlet 2211a faces the light outlet of the first light source device 21; the second wall 2212 has first and second beam outlets 2212a and 2212b spaced apart, the first beam outlet 2212a being located between the beam inlet 2211a and the first through hole 131, and the second beam outlet 2212b facing the second through hole 132. The beam splitter 222 is located between the beam inlet 2211a and the first beam outlet 2212a, and the beam splitter 222 is inclined toward the side of the first wall 2211 where the beam inlet 2211a is located; the reflection sheet 223 is located between the first wall 2211 and the second beam outlet 2212b, and the reflection sheet 223 is parallel to the beam splitting sheet 222.
Specifically, the housing 221 is a rectangular box, and the first wall 2211 and the second wall 2212 are opposite side walls on the rectangular box. The beam inlet 2211a is a through hole formed in the first wall 2211, and the first beam outlet 2212a and the second beam outlet 2212b are two through holes formed in the second wall 2212, respectively. The light beam entrance 2211a faces the light exit of the light source device, and the light beam entrance 2211a, the first light beam exit 2212a and the first through hole 131 are positioned on the same straight line. The beam splitting sheet 222 is installed inside the housing 221 and between the first wall 2211 and the second beam outlet 2212 b. The reflecting sheet 223 is installed in the housing 221 between the first wall 2211 and the second beam outlet 2212b and parallel to the beam splitting sheet 222.
The beam splitting sheet 222 is transparent glass with a semi-transparent and semi-reflective film coated on the surface, light beams irradiated on the semi-transparent and semi-reflective film can be transmitted by a part of light beams, and the rest of light beams can be reflected by the semi-transparent and semi-reflective film, so that the semi-transparent and semi-reflective film can split the light beams irradiated on the beam splitting sheet 222 into two beams, wherein one beam of light can penetrate the beam splitting sheet 222, and the irradiation direction is not changed; the other beam is reflected by the transflective film. The reflecting sheet 223 is transparent glass coated with a reflecting film, and the light beam is irradiated on the reflecting film to be emitted.
Thus, the light beam emitted from the first light source device 21 is directed to the beam splitting sheet 222 through the beam inlet 2211a, and the beam splitting sheet 222 splits the light beam into two beams. One of the beams is transmitted through the beam splitting sheet 222 and is emitted from the first beam outlet 2212a to form a first beam; the other beam is reflected by the beam splitting sheet 222, is directed to the reflecting sheet 223, is reflected by the reflecting sheet 223, is directed to the second beam outlet 2212b, and is emitted from the second beam outlet 2212b to form a second beam.
With continued reference to fig. 5, in the embodiment of the present application, the angle a between the beam splitting sheet 222 and the side of the first wall 2211 where the beam inlet 2211a is located is greater than 0 ° and less than 90 °. The size of the included angle a affects the transmittance and the reflectance of the beam splitter 222 to the incident light beam, when the included angle a is smaller, the transmittance of the beam splitter 222 to the incident light beam is larger, the reflectance of the beam splitter 222 to the incident light beam is smaller, which means that the intensity of the first light beam is larger and the intensity of the second light beam is smaller; conversely, when the included angle a is larger, the smaller the transmittance of the beam splitting sheet 222 to the incident light beam, the larger the reflectance of the beam splitting sheet 222 to the incident light beam, meaning that the smaller the intensity of the first light beam, the larger the intensity of the second light beam.
Specifically, the degree of the included angle a may be 45 °. Thus, when the light beam emitted from the first light source device 21 irradiates the beam splitter 222, half of the light can be transmitted through the beam splitter 222, and the other half of the light is reflected by the beam splitter 222, which means that the light intensities of the first light beam and the second light beam are the same, and the brightness of the first pattern and the second pattern is the same. In practical use, the included angle a may also be selected to be within the above range, for example 30 °, 50 °, 60 ° or 80 °.
With continued reference to fig. 3, in the embodiment of the present application, the number of the light holes 231 is plural, and the plurality of light holes 231 are distributed at intervals around the center line of the rotating member 23.
With continued reference to fig. 3, in the embodiment of the present application, the rotating member 23 has a central hole 232, and the central hole 232 of the rotating member 23 is located between the first light beam outlet 2212a and the first through hole 131. The first light beam is directed to the first optical processing device 14 through the central hole 232 and the first through hole 131 of the rotation member 23, forming a first pattern.
Fig. 6 is an exploded schematic view of a second projection assembly in the starry sky projector according to the embodiment of the present application, and referring to fig. 4 and 6, in the embodiment of the present application, the starry sky projector further includes a second projection assembly 30, and the second projection assembly 30 includes a second light source device 31, a third optical processing device 32, a rotating shaft 33 and a second gear 34, which are disposed in the housing 10. The housing 10 is provided with a third through hole 133, the light outlet of the second light source device 31 faces the third through hole 133, and a part of the third optical processing device 32 is located between the light outlet of the second light source device 31 and the third through hole 133. One end of the rotating shaft 33 is connected with the third optical processing device 32, the other end of the rotating shaft 33 is connected with the second gear 34, the second gear 34 is connected with the power device 40, and the power device 40 drives the second gear 34 to rotate so as to drive the third optical processing device 32 to rotate. The light beam emitted from the second light source device 31 is directed to the rotating third optical processing device 32 to form a dynamic third pattern.
The second projection assembly 30 is configured to project a star cloud image, and the light beam emitted by the second light source is directed to the third optical processing device 32 through the third through hole 133 to form a third pattern. The power device 40 drives the second gear 34 to rotate to drive the third optical processing device 32 to rotate, thereby rotating the third pattern. When the third pattern is a star cloud pattern, the effect of projection onto a wall or ceiling is a dynamic star cloud image.
Specifically, the second light source apparatus 31 includes a circuit board 311 and a light emitting device 312 mounted on the circuit board 311. The third optical processing device 32 is a transparent plate with a star cloud print. The light beam emitted from the light emitting device 312 is refracted as it passes through the third optical processing device 32, forming a star cloud pattern.
The circuit board 311 is a printed circuit board (Printed Circuit Board, PCB), the Light Emitting device 312 is a Light-Emitting Diode (LED), and the transparent plate is transparent glass or transparent plastic.
With continued reference to fig. 4 and 6, in the embodiment of the present application, the third through hole 133 is provided with a light homogenizing lens 50. The light homogenizing lens 50 has a function of diffusing the light beam, and can diffuse the light beam forming the third pattern, so that the third pattern can be projected onto the wall or the ceiling more uniformly in a larger area, and a more magnificent star cloud image is presented.
Specifically, the dodging lens 50 is a fly eye lens, such as a squama cover.
With continued reference to fig. 4 and 6, in the embodiment of the present application, a condensing lens 60 is disposed between the second light source device 31 and the third optical processing device 32. The condensing lens 60 has the function of converting the light with a large angle into light with a small angle, and can collect the light beams emitted from the second light source, so that more light beams can be emitted to the third optical processing device 32, and light loss is reduced.
Specifically, the condensing lens 60 is a total internal reflection lens, such as a TIR lens (Total Internal Reflection, TIR).
With continued reference to fig. 4, in the embodiment of the present application, the power device 40 includes a motor 41 and a third gear 42, and the third gear 42 is connected to a motor shaft of the motor 41. The rotating member 23 is a first gear and the third gear 42 is meshed with the first gear and the second gear 34.
Specifically, the motor 41 is a dc motor 41, and a motor shaft of the motor 41 drives the third gear 42 to rotate. When the third gear 42 rotates, the rotating member 23 and the second gear 34 meshed with the third gear 42 are driven to rotate, so that the light holes 231 surrounding the rotating member 23 are periodically located between the second through holes 132 and the second light beam outlet 2212b, and the second light beam can pass through the light holes 231 and the second through holes 132 and be emitted to the second optical processing device 15, so as to show the effect of flickering of the second pattern. The rotation speed of the motor 41 affects the period of the second pattern flicker, and the faster the rotation speed of the motor 41, the shorter the period of the second pattern flicker, and the faster the frequency of the second pattern 41 flicker; conversely, the slower the rotational speed of the motor 41, the longer the period of the second pattern flicker, and the slower the frequency of the second pattern flicker.
Meanwhile, the second gear 34 drives the third optical processing device 32 to rotate through the rotating shaft 33, so that the third pattern has a moving effect.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. The star-sky projector is characterized by comprising a shell, a first projection assembly and a power device;
the shell is provided with a first through hole and a second through hole which are distributed at intervals, the first through hole is provided with a first optical processing device, and the second through hole is provided with a second optical processing device;
the first projection assembly comprises a first light source device, a beam splitter and a rotating member, wherein the first light source device, the beam splitter and the rotating member are arranged in the shell, and a part of the beam splitter is positioned between the first light source device and the rotating member;
the light beam emitted by the first light source device passes through the beam splitter to form a first light beam and a second light beam, and the first light beam passes through the first through hole to be emitted to the first optical processing device so as to form a first pattern;
the rotating piece is provided with a light hole, and the light hole is positioned between the second through hole and the beam splitter;
the rotating piece is connected with the power device, and the power device drives the rotating piece to rotate, so that the second light beam periodically passes through the light transmission hole and the second through hole and is emitted to the second optical processing device to periodically form a second pattern.
2. The star-light projector of claim 1 wherein the beam splitter comprises a housing and a beam splitter and a reflector disposed within the housing;
the housing has a first wall and a second wall parallel to each other; the first wall is provided with a light beam inlet which is opposite to the light outlet of the first light source device; the second wall is provided with a first light beam outlet and a second light beam outlet which are distributed at intervals, the first light beam outlet is positioned between the light beam inlet and the first through hole, and the second light beam outlet is opposite to the second through hole;
the beam splitting sheet is positioned between the beam inlet and the first beam outlet, and the beam splitting sheet is inclined towards the side of the first wall where the beam inlet is positioned;
the reflecting sheet is positioned between the first wall and the second beam outlet, and the reflecting sheet is parallel to the beam splitting sheet.
3. The star-light projector of claim 2 wherein the angle between the beam splitter and the side of the first wall where the beam entrance is located is greater than 0 ° and less than 90 °.
4. The star-light-emitting device according to claim 2, wherein the number of the light-transmitting holes is plural, and the plurality of the light-transmitting holes are uniformly distributed at intervals around the center line of the rotating member.
5. The star-light-emitting device according to any of claims 1-4, wherein the first light source means is a laser generator and the first optical processing means and the second optical processing means are diffraction diaphragms.
6. The overhead projector of any one of claims 1-4, further comprising a second projection assembly including a second light source device, a third optical processing device, a shaft, and a second gear disposed within the housing;
the shell is provided with a third through hole, the light outlet of the second light source device is opposite to the third through hole, and part of the third optical processing device is positioned between the light outlet of the second light source device and the third through hole;
one end of the rotating shaft is connected with the third optical processing device, the other end of the rotating shaft is connected with the second gear, the second gear is connected with the power device, and the power device drives the second gear to rotate so as to drive the third optical processing device to rotate;
the light beam emitted by the second light source device is emitted to the rotating third optical processing device so as to form a dynamic third pattern.
7. The star-light projector of claim 6, wherein the third through hole is provided with a light homogenizing lens.
8. The star-light projector of claim 6 wherein a condenser lens is disposed between the second light source device and the third optical processing device.
9. The overhead projector of claim 6, wherein the power device comprises a motor and a third gear, the third gear being coupled to a motor shaft of the motor; the rotating piece is a first gear, and the third gear is meshed with the first gear and the second gear.
10. The star-light projector of claim 6 wherein the housing comprises a rear cover, a front cover and a side cover, the rear cover having a first notch, the front cover having a second notch, the first notch and the second notch enclosing to form a mounting opening, the side cover being mounted on the mounting opening, the first through hole, the second through hole, and the third through hole being located on the side cover.
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| CN202110745614.2A CN113357574B (en) | 2021-06-30 | 2021-06-30 | Star projecting lamp |
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| CN202110745614.2A CN113357574B (en) | 2021-06-30 | 2021-06-30 | Star projecting lamp |
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| CN114234130A (en) * | 2021-12-24 | 2022-03-25 | 生迪光电科技股份有限公司 | Atmosphere lamp |
| CN221222468U (en) * | 2023-12-06 | 2024-06-25 | 深圳博浪科技有限公司 | Projection device for generating meteor light effects and projection lamp for generating meteor light effects |
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