CN113357574A - Starry sky projecting lamp - Google Patents

Starry sky projecting lamp Download PDF

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Publication number
CN113357574A
CN113357574A CN202110745614.2A CN202110745614A CN113357574A CN 113357574 A CN113357574 A CN 113357574A CN 202110745614 A CN202110745614 A CN 202110745614A CN 113357574 A CN113357574 A CN 113357574A
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China
Prior art keywords
light
hole
processing device
optical processing
light beam
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Granted
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CN202110745614.2A
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Chinese (zh)
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CN113357574B (en
Inventor
王跃平
隋中华
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Sengled Co Ltd
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Sengled Co Ltd
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Priority to CN202110745614.2A priority Critical patent/CN113357574B/en
Publication of CN113357574A publication Critical patent/CN113357574A/en
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Publication of CN113357574B publication Critical patent/CN113357574B/en
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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
    • 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
    • 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
    • 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
    • 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
    • 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]
    • 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 starry sky projection lamp, and relates to the technical field of lamps. 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 penetrates 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-transmissive hole and the second through hole and is directed to the second optical processing device to periodically form a second pattern. The starry sky projection lamp provided by the embodiment of the application can reduce the loss of light when the light passes through the optical processing device, and improves the light-emitting rate of the starry sky projection lamp.

Description

Starry sky projecting lamp
Technical Field
The application relates to the technical field of lamps, in particular to a starry sky projection lamp.
Background
With the increasing pursuit of people for quality of life, lamps capable of creating various atmospheres are widely used in life. For example, a starry sky projector can project images of the starry night sky onto the walls or ceilings of a room to create a wonderful and romantic atmosphere in the room.
In the related art, a starry sky projector generally includes a housing, and a projection assembly and a driving assembly disposed in the housing. The projection assembly comprises a light source, a static optical processing device and a dynamic optical processing device, wherein 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 out of the shell, and meanwhile, the driving assembly 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 starry sky projection lamp can project static and dynamic combined star point patterns, and the visual perception of the movement of star points is provided.
However, in the related art, the light beam emitted from the light source is refracted and reflected for many 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-emitting rate of the starry sky projection lamp is not high.
Disclosure of Invention
The embodiment of the application provides a starry sky projection lamp, can reduce light loss, improves the light-emitting rate of starry sky projection lamp.
The embodiment of the application provides a starry sky projection lamp, 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 piece which are arranged in the shell, and part of the beam splitter is positioned between the first light source device and the rotating piece;
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 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 penetrates through the light 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 by 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 is emitted to the first optical processing device through the first through hole 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 member, and the second pattern is also periodically formed. When the first pattern and the second pattern are all starlight patterns, the visual effect presented by the first pattern is static starlight, the effect presented by the second pattern is periodically flickering starlight, and the static starlight and the flickering starlight are projected on a wall or a ceiling simultaneously to form a vivid starry sky image.
Thus, the beam emitted by the first device can be split by the beam splitter into a first beam directed to the first optical processing means and a second beam directed to the second optical processing means. The two light beams divided by the beam splitter are all 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 passing through the optical processing device is reduced, and the light emitting rate of the starry sky projection lamp is improved.
In one possible implementation, the star projector provided by the embodiment of the present application includes a housing, and a beam splitter plate and a reflector plate disposed in 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, and the light beam inlet is over against 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 over against 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 one side of the first wall where the beam inlet is positioned;
the reflector plate is located between the first wall and the second light beam outlet, and the reflector plate is parallel to the beam splitting plate.
Thus, the light beam emitted by the first light source device is emitted to the beam splitter through the light beam inlet, and the beam splitter splits the light beam into two beams. One beam of light transmits 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 starry sky projector provided by the embodiment of the present application, an included angle between the beam splitter and a side of the first wall where the light beam inlet is located is greater than 0 ° and less than 90 °.
The size of the included angle influences the transmittance and the reflectivity of the beam splitting sheet to the incident light beams, when the included angle is smaller, the transmittance of the beam splitting sheet to the incident light beams is larger, and the reflectivity of the beam splitting sheet to the incident light beams is smaller, which means that the intensity of the first light beams is larger, and the intensity of the second light beams is smaller; conversely, when the included angle is larger, the smaller the transmittance of the beam splitting sheet to the incident light beam is, and the larger the reflectance of the beam splitting sheet to the incident light beam is, which means that the smaller the intensity of the first light beam is, the larger the intensity of the second light beam is.
In a possible implementation manner, the star projector provided in the embodiment of the present application, the number of the light holes is multiple, and the light holes surround the center line of the rotating member and are distributed at intervals.
In a possible implementation manner, the starry sky projector provided in this 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 one possible implementation, the starry sky projector provided in the embodiments of the present application further includes a second projection assembly, the second projection assembly includes a second light source device, a third optical processing device, a rotation shaft, and a second gear, which are disposed in the housing;
a third through hole is formed in the shell, a light outlet of the second light source device is opposite to the third through hole, and part of the third optical processing device is located 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 third optical processing device which rotates to form a dynamic third pattern.
The second projection assembly 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, so that the third pattern rotates. When the third pattern is a star cloud pattern, the effect projected on the wall or the ceiling is a dynamic star cloud image.
In a possible implementation manner, in the star projector provided in this embodiment of the present application, the third through hole is provided with a dodging lens.
The light homogenizing lens has the function of homogenizing the projected light and shadow patterns, and can homogenize the formed third pattern, so that the third pattern can be projected on a wall or a ceiling more uniformly in a larger area, and a more ambitious star image is presented.
In a possible implementation manner, the star projector provided in the embodiment 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 effect 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 star projector provided by the embodiment of the application comprises a motor and a third gear, wherein the third gear is connected with a motor shaft of the motor; the rotating member is a first gear, and the third gear is engaged with the first gear and the second gear.
The motor shaft of motor drives the third gear and rotates, and the third gear drives first gear and the second gear rotation with third gear meshing when rotating, makes the light trap that encircles the setting on the first gear be periodic being located between second through-hole and the second light beam export, makes the second light beam can pass light trap and second through-hole, and the directive second optical treatment device presents the effect of second pattern scintillation. The rotation speed of the motor determines the flickering period of the second pattern, and the faster the rotation speed of the motor is, the shorter the flickering period of the second pattern is, and the faster the flickering frequency of the second pattern is; conversely, the slower the rotation speed of the motor, the longer the period of the second pattern blinking and the slower the frequency of the second pattern blinking.
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, the starry sky profection lamp that this application embodiment provided, the shell includes back lid, protecgulum and side cap, the back lid has first breach, the protecgulum has the second breach, first breach with the second breach encloses to close and forms the installing port, the side cap is installed on the installing port, first through-hole, second through-hole, third through-hole are located on the side cap.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a starry sky projector according to an embodiment of the present application;
FIG. 2 is an exploded view of the star field projector of an embodiment of the present application;
FIG. 3 is an exploded view of a first projection assembly of the star field projector of an embodiment of the present application;
FIG. 4 is a schematic view of an assembly of the star projector lamp of the embodiment of the present application;
FIG. 5 is a schematic diagram of the optical path of a beam splitter in the star field projector according to an embodiment of the present application;
fig. 6 is an exploded view of a second projection assembly in the star field projector of an embodiment of the present application.
Description of reference numerals:
10-a housing; 11-rear cover;
111-a backplane; 1111-tendon position;
112-a first side wall; 1121-first notch;
12-a front cover; 121-top plate;
122-a second sidewall; 1221-second gap;
13-side cover; 131-a first via;
132-a second via; 133-a third via;
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-a beam splitter;
221-a housing; 2211-a first wall;
2211 a-beam entrance; 2212-a second wall;
2212 a-first beam outlet; 2212 b-second beam outlet;
222-a beam splitting sheet; 223-a reflective sheet;
23-a rotating member; 231-light transmission holes;
232-central hole; 30-a second projection assembly;
31-a second light source device; 311-a circuit board;
312-a light emitting device; 32-a third optical processing device;
33-a rotating shaft; 34-a second gear;
40-a power plant; 41-a motor;
42-a third gear; 50-a light homogenizing lens;
60-condenser lens.
Detailed Description
In the starry sky projection lamp in the related art, because light beams emitted by a light source need to sequentially pass through a static optical processing device and a dynamic optical processing device, when the light beams pass through the static optical processing device, part of the light beams can be reflected or refracted and cannot be correctly emitted to the dynamic optical processing device, so that light beam loss is caused; when other light beams emitted to the movable optical processing device pass through the movable optical processing device, the light beams are also reflected or refracted and cannot be emitted by the starry sky projection lamp correctly, so that the light beams are further lost, and the light emitting rate of the starry sky projection lamp is low.
Based on this, the embodiment of the application provides a starry sky projecting lamp, and the light beam that the light source device of starry sky projecting lamp sent out passes through the beam splitter and splits into the first light beam of incidenting first optical processing device and the second light beam of inciding second optical processing device. Compared with the related art, 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 starry sky projection lamp is improved.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a starry sky projector according to an embodiment of the present application; fig. 2 is an exploded view of the star field projector according to an embodiment of the present application.
Referring to fig. 1-2, the star projector according to the embodiment of the present application includes a housing 10, a first projection assembly 20, and a power device 40.
The housing 10 has a first through hole 131 and a second through hole 132 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 rotation member 23 disposed in the housing 10, and a portion of the beam splitter 22 is located between the first light source device 21 and the rotation member 23. The light beam emitted from the first light source device 21 is formed into a first light beam and a second light beam by the beam splitter 22, and the first light beam is emitted 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 unit 40, and the power unit 40 drives the rotating member 23 to rotate, so that the second light beam periodically passes through the light-transmitting hole 231 and the second through hole 132 and is emitted to the second optical processing device 15 to periodically form a second pattern.
The first projection assembly 20 is used for projecting 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 beam is directed through the first via 131 towards the first optical processing device 14 forming 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-transmitting hole 231 faces the second through hole 132, the second light beam can pass through the light-transmitting hole 231 and the second through hole 132 and be emitted to the second optical processing device 15 to form a second pattern. In this process, the light-transmitting holes 231 are periodically aligned with 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 all starlight patterns, the visual effect presented by the first pattern is static starlight, the effect presented by the second pattern is periodically flickering starlight, and the static starlight and the flickering starlight are projected on a wall or a ceiling simultaneously to form a vivid starry sky image.
In the star projector of the embodiment of the present application, the light beam emitted from the first device may be split into the first light beam directed to the first optical processing device 14 and the second light beam directed to the second optical processing device 15 by the beam splitter 22. Thus, the two beams of light divided by the beam splitter 22 are all only emitted to one optical processing device, so that multiple refraction and reflection of the light beams are avoided, the loss of the light beams when passing through the optical processing device is reduced, and the light emitting rate of the starry sky projection lamp is improved.
FIG. 3 is an exploded view of a first projection assembly of the star field projector of an embodiment of the present application; fig. 4 is an assembly schematic diagram of a starry sky projector according to an embodiment of the present application.
Referring to fig. 2 to 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, where 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 an installation opening, the side cover 13 is installed on the installation 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 sidewall 112 surrounding the periphery of the bottom plate 111, and a space enclosed by the bottom plate 111 and the first sidewall 112 is used for placing various parts of the starry sky projector. The side of the bottom plate 111 facing the front cover 12 has a plurality of ribs 1111, and the ribs 1111 are combined with each other to form a mounting groove for mounting various parts.
The front cover 12 includes a circular top plate 121 and a second side wall 122 surrounding the top plate 121, and a space enclosed by the top plate 121 and the second side wall 122 is used for accommodating various parts of the starry sky projector.
The first notch 1121 extends from the edge of the first sidewall 112 toward the bottom plate 111, the second notch 1221 extends from the edge of the second sidewall 122 toward the top plate 121, and when the rear cover 11 is connected to the front cover 12, the first notch 1121 is aligned with the second notch 1221 to form a mounting opening having the same curvature as the first sidewall 112 and the second sidewall 122.
The side cover 13 is a plate with a bending arc 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 that the surface of the shell 10 is flat and beautiful. The first through hole 131 and the second through hole 132 are located on the side cover 13, the first optical processing device 14 and the second optical processing device 15 are both 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 covers 13 are all made of plastic 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 plays a role of protecting the first optical processing device 14 and the second optical processing device 15, and preventing the first optical processing device 14 and the second optical processing device 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 diffraction films.
Specifically, the laser light emitted from the laser generator is formed into two laser beams, i.e., a first beam and a second beam, by the beam splitter 22. The first light beam is emitted to the first optical processing device 14 through the first through hole 131, and is diffracted when passing through the first optical processing device 14, so that the first light beam is diffused and simultaneously forms a dispersed 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 dispersed light spot, i.e., a second pattern. When the first pattern is projected on a wall or ceiling, the visual effect is a static light spot simulating a static starlight. When the second pattern is projected on a wall or ceiling, the visual effect is to present periodically appearing spots simulating a flickering star light. The static starlight and the flickering starlight are projected to a wall or a ceiling together to form a vivid starry sky image.
In the embodiment of the present 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 starry sky projection lamps.
In the embodiment of the present application, the Diffractive film is a Diffractive Optical Element (DOE), and laser light is diffracted when the Diffractive film is irradiated.
Fig. 5 is a schematic diagram of the optical path of the beam splitter in the star projector according to the embodiment of the present invention, and referring to fig. 3 to 5, the beam splitter 22 in the embodiment of the present invention includes a housing 221, and a beam splitting plate 222 and a reflective plate 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, and the light beam inlet 2211a faces the light outlet of the first light source device 21; the second wall 2212 has a first light beam outlet 2212a and a second light beam outlet 2212b which are spaced apart, the first light beam outlet 2212a is located between the light beam inlet 2211a and the first through hole 131, and the second light beam outlet 2212b faces the second through hole 132. The splitting sheet 222 is located between the beam entrance 2211a and the first beam exit 2212a, and the splitting sheet 222 is inclined toward the side of the first wall 2211 where the beam entrance 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 two opposite side walls of the rectangular box, respectively. The beam entrance 2211a is a through hole opened on the first wall 2211, and the first and second beam exits 2212a and 2212b are two through holes opened on the second wall 2212, respectively. The light beam inlet 2211a faces the light outlet of the light source device, and the light beam inlet 2211a, the first light beam outlet 2212a and the first through hole 131 are located on the same straight line. The beam splitting sheet 222 is installed in the housing 221 between the first wall 2211 and the second beam outlet 2212 b. The reflection sheet 223 is installed in the housing 221 between the first wall 2211 and the second beam outlet 2212b, and is parallel to the beam splitting sheet 222.
The beam splitting sheet 222 is transparent glass coated with a semi-transparent and semi-reflective film on the surface, light beams irradiated on the semi-transparent and semi-reflective film, one part of the light beams can transmit the semi-transparent and semi-reflective film, and the other part of the light beams can be reflected by the semi-transparent and semi-reflective film, so that the semi-transparent and semi-reflective film can divide the light beams irradiated on the semi-transparent and semi-reflective film into two light beams, wherein one light beam can penetrate through the beam splitting sheet 222, and the illumination direction is not changed; the other light is reflected by the transflective film. The reflective sheet 223 is transparent glass coated with a reflective film on which light beams are irradiated to be emitted.
Thus, the light beam emitted from the first light source device 21 is emitted to the beam splitter 222 through the light beam inlet 2211a, and the beam splitter 222 splits the light beam into two beams. One of the beams transmits through the beam splitting sheet 222 and exits through the first beam outlet 2212a to form a first beam; the other light beam is reflected by the beam splitting sheet 222, directed to the reflective sheet 223, reflected by the reflective sheet 223, directed to the second light beam outlet 2212b, and emitted from the second light beam outlet 2212b to form a second light beam.
With continued reference to fig. 5, in the present embodiment, the angle a between the beam splitting tab 222 and the side of the first wall 2211 where the light beam inlet 2211a is located is greater than 0 ° and less than 90 °. The size of the included angle a affects the transmittance and reflectance of the beam splitting sheet 222 to the incident light beam, and when the included angle a is smaller, the transmittance of the beam splitting sheet 222 to the incident light beam is larger, and the reflectance of the beam splitting sheet 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 is, and the larger the reflectance of the beam splitting sheet 222 to the incident light beam is, which means that the smaller the intensity of the first light beam is, the larger the intensity of the second light beam is.
Specifically, the degree of the included angle a may be 45 °. In this way, when the light beam emitted by the first light source device 21 is irradiated on the beam splitting sheet 222, half of the light can transmit through the beam splitting sheet 222, and the other half of the light is reflected by the beam splitting sheet 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 ensured to be the same. In practical use, the included angle a may also be selected to have other values within the above range, such as 30 °, 50 °, 60 ° or 80 °, as desired.
With continued reference to fig. 3, in the embodiment of the present invention, the number of the light holes 231 is multiple, and the light holes 231 are spaced around the center line of the rotating member 23.
With continued reference to fig. 3, in the present embodiment, 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 center hole 232 and the first through hole 131 of the rotation member 23 to form a first pattern.
Fig. 6 is an exploded view of a second projection assembly in the star field projector according to the embodiment of the present invention, and referring to fig. 4 and 6, the star field 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 to the third optical processing device 32, the other end of the rotating shaft 33 is connected to the second gear 34, the second gear 34 is connected to 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 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 used for projecting a star-cloud image, and a light beam emitted by the second light source is emitted 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, so as 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 projected on the wall or the ceiling is a dynamic star cloud image.
Specifically, the second light source device 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 print. The light beam emitted from the light emitting device 312 is refracted while passing through the third optical processing device 32, forming a star cloud pattern.
The Circuit Board 311 is a 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 light uniformizing lens 50 is disposed on the third through hole 133. The dodging 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 on a wall or a 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 squash 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 condenser lens 60 has an effect of converting the large-angle light into the small-angle light, and can converge the light beam emitted by the second light source, so that more light beams can be emitted to the third optical processing device 32, and the light loss is reduced.
Specifically, the condensing lens 60 is a Total Internal Reflection lens (TIR) such as a Total Internal Reflection (TIR) lens.
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 engaged with the third gear 42 are driven to rotate, so that the light holes 231 arranged around 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 irradiate towards the second optical processing device 15, thereby presenting the effect of flickering of the second pattern. The rotation speed of the motor 41 influences the period of the second pattern blinking, and the faster the rotation speed of the motor 41, the shorter the period of the second pattern blinking and the faster the frequency of the second pattern 41 blinking; conversely, the slower the rotation speed of the motor 41, the longer the period of the second pattern blinking, and the slower the frequency of the second pattern blinking.
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 used for illustrating the technical solutions 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 solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A starry 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 piece which are arranged in the shell, and part of the beam splitter is positioned between the first light source device and the rotating piece;
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 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 penetrates through the light hole and the second through hole and is emitted to the second optical processing device to periodically form a second pattern.
2. The starfield projector as claimed in claim 1 wherein the beam splitter comprises a housing and a beam splitter plate and a reflector plate 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, and the light beam inlet is over against 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 over against 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 one side of the first wall where the beam inlet is positioned;
the reflector plate is located between the first wall and the second light beam outlet, and the reflector plate is parallel to the beam splitting plate.
3. The starry sky projector as claimed in claim 2, wherein the angle between the beam splitter and the side of the first wall on which the light beam entrance is located is greater than 0 ° and less than 90 °.
4. The starry sky projector as claimed in claim 2, wherein the number of the light-transmitting holes is plural, and the plural light-transmitting holes are spaced and uniformly distributed around the center line of the rotating member.
5. The starry sky projector as claimed in any one of claims 1 to 4, wherein the first light source device is a laser generator, and the first optical processing device and the second optical processing device are diffractive diaphragms.
6. The starry sky projector as claimed in any one of claims 1 to 4, wherein the starry sky projector further comprises a second projection assembly, the second projection assembly comprising a second light source device, a third optical processing device, a shaft and a second gear disposed within the housing;
a third through hole is formed in the shell, a light outlet of the second light source device is opposite to the third through hole, and part of the third optical processing device is located 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 third optical processing device which rotates to form a dynamic third pattern.
7. The starry sky projector as claimed in claim 6, wherein a dodging lens is disposed on the third through hole.
8. The starry sky projector as claimed in claim 6, wherein a condenser lens is disposed between the second light source device and the third optical processing device.
9. The starry sky projector as claimed in claim 6, wherein said power means includes a motor and a third gear, said third gear being connected to a motor shaft of said motor; the rotating member is a first gear, and the third gear is engaged with the first gear and the second gear.
10. The starry sky projector as claimed in claim 6, wherein the housing comprises a rear cover, a front cover and a side cover, the rear cover has a first notch, the front cover has a second notch, the first notch and the second notch enclose 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 located on the side cover.
CN202110745614.2A 2021-06-30 2021-06-30 Star projecting lamp Active CN113357574B (en)

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