CN108826122B - Starry sky projection lamp - Google Patents
Starry sky projection lamp Download PDFInfo
- Publication number
- CN108826122B CN108826122B CN201810879129.2A CN201810879129A CN108826122B CN 108826122 B CN108826122 B CN 108826122B CN 201810879129 A CN201810879129 A CN 201810879129A CN 108826122 B CN108826122 B CN 108826122B
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- China
- Prior art keywords
- light
- diaphragm
- light source
- starry sky
- multicolor
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Classifications
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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
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
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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
-
- 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
- F21V7/0025—Combination of two or more reflectors for a single light source
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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]
Abstract
The invention discloses a starry sky projection lamp, which comprises a multicolor light source array, a first diaphragm, a second diaphragm, a collimating lens, a reflector array and a support for mounting the multicolor light source array, the first diaphragm and the second diaphragm, wherein the multicolor light source array, the first diaphragm and the second diaphragm are sequentially arranged along a light path, the multicolor light source array comprises at least two light sources which are arranged in a clearance way and have different colors, the first diaphragm is provided with first light through holes which are in one-to-one correspondence with the light sources in the multicolor light source array and are smaller than the light emitting surfaces of the corresponding light sources, the second diaphragm is provided with second light through holes which are in one-to-one correspondence with the first light through holes, and the minimum incident angle of the first light through holes corresponding to the light sources which are adjacent is larger than half of the collection angle of the light rays of the second light. The invention can not only realize the starry sky projection effect of various colors and meet more projection requirements, but also reduce the size of light spots and project more stars, well shield stray light emitted from the first through light hole and improve the starry sky projection effect.
Description
Technical Field
The invention relates to the technical field of illumination, in particular to a starry sky projection lamp.
Background
A starry sky projection lamp is a decorative lighting device which can project countless starry or snowflake patterns on walls, ceilings and lawns, is used indoors such as KTV boxes and outdoors such as courtyards, lawns and plants, can play a role in creating atmosphere and decorating landscapes, and has very wide application in life.
At present, the starry sky projection lamp in the market adopts a laser diode as a light source, but the laser diode is almost monochrome red, green and blue, and white cannot be effectively synthesized, so that a white pattern is difficult to form. In addition, the existing starry sky projection lamp is generally a monochromatic projection lamp, a plurality of projection lamps are needed to realize a color effect, the use is inconvenient, the existing starry sky projection lamp is large in size and high in cost, and the actual application requirements cannot be met. In addition, the number of stars projected by the existing starry sky projection lamp is limited, and the starry sky projection effect is influenced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the starry sky projection lamp which is small in size, simple in structure and capable of achieving a multi-color projection effect.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a starry sky projection lamp, includes multicolor light source array, first diaphragm, second diaphragm, collimating lens and the speculum array that sets gradually along the light path, still including being used for the installation the support of multicolor light source array, first diaphragm and second diaphragm, multicolor light source array includes that two at least gaps arrange and the different light source of colour, be equipped with on the first diaphragm with light source one-to-one in the multicolor light source array just is less than the first logical unthreaded hole of the light emitting area of corresponding light source, be equipped with on the second diaphragm with the second logical unthreaded hole of first logical unthreaded hole one-to-one, the minimum incident angle that the light source projects the first logical unthreaded hole that adjacent light source corresponds is greater than the half of the collection angle of the second logical unthreaded hole that this first logical unthreaded hole corresponds to light.
Further, the multicolor light source array comprises four light sources with different colors, and the light sources are LED light sources or laser light sources.
further, a light-tight layer is arranged between every two adjacent light sources.
Furthermore, the light source and the corresponding first light through hole and the second light through hole are coaxially arranged.
Furthermore, the collection angle of the second light through hole to the light is smaller than the collection angle of the corresponding first light through hole to the light.
Further, be equipped with on the support respectively with the recess of polychrome light source array adaptation, and with the first step of first diaphragm adaptation and the second step of second diaphragm adaptation, the polychrome light source array be spacing in the recess, first diaphragm is installed on first step, the second diaphragm is installed on the second step.
Further, the distance between the first diaphragm and the multicolor light source array is 0.2-1 mm.
Furthermore, the thickness of the first diaphragm is less than 0.5mm, and the first diaphragm and the second diaphragm are both made of opaque materials.
Further, still include along the light path and be located collimating lens the beam splitting unit in the place ahead, beam splitting unit comprises a plurality of speculum, and the plane of reflection of two arbitrary speculums is not coplane.
Furthermore, the reflector array comprises a plurality of small reflectors, and the small reflectors form a curved reflecting surface.
The invention provides a starry sky projection lamp, which comprises a multicolor light source array, a first diaphragm, a second diaphragm, a collimating lens, a reflector array and a support for mounting the multicolor light source array, the first diaphragm and the second diaphragm, wherein the multicolor light source array, the first diaphragm and the second diaphragm are sequentially arranged along a light path, the multicolor light source array comprises at least two light sources which are arranged at intervals and have different colors, the first diaphragm is provided with first light through holes which are in one-to-one correspondence with the light sources in the multicolor light source array and are smaller than the light emitting surfaces of the corresponding light sources, the second diaphragm is provided with second light through holes which are in one-to-one correspondence with the first light through holes, and the minimum incident angle of the light sources projected to the first light through holes corresponding to the adjacent light sources is larger than half of the collection angle of the light rays of the second light through holes corresponding to the first. The multi-color light source array is provided with the plurality of light sources with different colors, so that a starry sky projection effect with various colors can be realized, more projection requirements are met, meanwhile, the first diaphragm is arranged, and the first light through hole with the size smaller than the light emitting surface of the corresponding light source is arranged on the first diaphragm, so that the size of a light spot is reduced, more stars are projected, and the projection effect is improved; the second diaphragm is provided with the second light through hole, and the incident angle of the light source projected to the first light through hole corresponding to the adjacent light source is larger than half of the collection angle of the second light through hole corresponding to the first light through hole to the light, so that stray light emitted from the first light through hole is well shielded, and the starry sky projection effect is further improved.
Drawings
FIG. 1 is a schematic diagram of a star field projection lamp according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of the light source and the first and second diaphragms in one embodiment;
FIG. 3 is a schematic diagram of a light source according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a stent in an embodiment of the present invention.
Shown in the figure: 10. an array of polychromatic light sources; 110. a light source; 120. a light-impermeable layer; 20. a first diaphragm; 210. a first light passing hole; 30. a second diaphragm; 310. a second light passing hole; 40. a beam splitting unit; 410. a mirror; 50. a collimating lens; 60. an array of mirrors; 610. a small mirror; 70. a support; 710. a groove; 720. a first step; 730. a second step; 80. a drive mechanism.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
As shown in fig. 1, the present invention provides a starry sky projection lamp, which comprises a multicolor light source array 10, a first diaphragm 20, a second diaphragm 30, a collimating lens 50 and a reflector array 60, which are sequentially arranged along a light path, and further comprises a bracket 70 for mounting the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30, the multicolor light source array 10 comprises a plurality of light sources 110 arranged at intervals and with different colors, the first diaphragm 20 is provided with first light through holes 210 which are corresponding to the light sources 110 in the multicolor light source array 10 one by one and are smaller than the light emitting surfaces of the corresponding light sources 110, the second diaphragm 30 is provided with second light passing holes 310 corresponding to the first light passing holes 210 one to one, the incident angle of the light source 110 projected to the first light passing hole 210 corresponding to the adjacent light source 110 is greater than half of the collection angle of the second light passing hole 310 corresponding to the first light passing hole 210. Specifically, by arranging a plurality of light sources 110 with different colors in the multicolor light source array 10, a starry sky projection effect with multiple colors can be realized, and a higher projection requirement is met, and meanwhile, the first diaphragm 20 is arranged, and the first light through hole 210 with the size smaller than the light emitting surface of the corresponding light source 110 is arranged on the first diaphragm 20, so that the size of a light spot is reduced, more stars are projected, and the projection effect is improved; the second diaphragm 30 is provided with a second light passing hole 310, and the minimum incident angle α of the light source 110 projected to the first light passing hole 210 corresponding to the adjacent light source 110 is greater than half of the collection angle β of the second light passing hole 310 corresponding to the first light passing hole 210 to the light, as shown in fig. 2, so that the stray light emitted from the first light passing hole 210 is well shielded, and the starry sky projection effect is further improved.
As shown in fig. 3, the multicolor light source array 10 includes four light sources 110 with different colors, and the light sources 110 are LED light sources or laser light sources. Specifically, the light sources 110 with different colors are red, green, blue and white, wherein the white light source is an LED chip, and the red, green and blue light sources may be laser diodes or LED chips. The four light sources 110 with different colors are arranged to form a rectangle, a diamond or other shapes, and are fixed on the mounting board, and the opaque layer 120 is disposed between two adjacent light sources 110, so as to prevent light emitted by one light source 110 from projecting to another light source 110 from the side to form stray light and affect the projection effect, the opaque layer 120 may be made of a diffuse reflection material, such as an aluminum plate or a mixture of silicon oxide and silica gel, or a mixture of titanium oxide and silica gel, or a mixture of silicon carbide and silica gel, but other materials with high reflectivity or light absorption materials may also be used.
Preferably, the light source 110 is coaxially disposed between the corresponding first light passing hole 210 and the corresponding second light passing hole 310. Preferably, the collection angle of the second light passing hole 310 for the light is smaller than the collection angle of the corresponding first light passing hole 210 for the light. Specifically, the light source 110, the first light passing hole 210 and the second light passing hole 310 are coaxially arranged, so that the sizes of the first light passing hole 210 and the second light passing hole 310 can be conveniently designed, the relative positions of the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30 can be conveniently controlled, and the collection angle of the second light passing hole 310 to light rays can be conveniently smaller than that of the first light passing hole 210 to light rays. When the collection angle of the second light through hole 310 to the light is smaller than the collection angle of the corresponding first light through hole 210 to the light, the stray light generated by the adjacent light source 110 can be better shielded, that is, not only the stray light directly projected from the adjacent light source 110 to the first light through hole 210 can be shielded, but also the stray light projected from the adjacent first light through hole 210 to the second light through hole 310 can be shielded. It should be noted that the collection angle of the first light passing hole 210 to the light, that is, the maximum included angle formed by the light emitted by the light source 110 projecting to the first light passing hole 210, and the collection angle of the second light passing hole 310 to the light, that is, the effective aperture of the second light passing hole 310 is relative to the opening angle of the first light passing hole 210.
As shown in fig. 4, a groove 710 adapted to the multicolor light source array 10, a first step 720 adapted to the first diaphragm 20, and a second step 730 adapted to the second diaphragm 30 are respectively disposed on the support 70, the multicolor light source array 10 is limited in the groove 710, the first diaphragm 20 is mounted on the first step 720, and the second diaphragm 30 is mounted on the second step 730. The positions of the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30 are limited by arranging the groove 710, the first step 720 and the third step 730 on the support 70 respectively, so that relative movement of the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30 is avoided, the projection effect is influenced, gaps among the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30 are convenient to control through the first step 720 and the second step 720, preferably, the distance between the first diaphragm 20 and the multicolor light source array 10 is 0.2-1 mm, the thickness of the first diaphragm 20 is smaller than 0.5mm, and as the surface temperature of the light source 110 is very high, the first diaphragm 20 cannot be directly attached to the light source 110, otherwise, the light source is easy to damage and influence the service life, and certainly, the distance between the diaphragm 20 and the light source 110 cannot be too large, so that the brightness of light spots is not influenced and the brightness of stars is finally influenced. The thickness of the first diaphragm 20 is controlled within 0.5mm, so that the light entering the first light through hole 210 can be absorbed by the inner wall when the thickness of the first diaphragm is larger, and the light spot brightness is not affected.
Preferably, the first diaphragm 20 and the second diaphragm 30 are made of light-tight materials. Specifically, the first diaphragm 20 and the second diaphragm 30 may be made of a black-plated metal material, and may absorb light or reflect light while ensuring surface flatness.
Preferably, the starry sky projection lamp further includes a beam splitting unit 40 located in front of the collimating lens 50 along the light path, the beam splitting unit 40 is composed of a plurality of reflecting mirrors 410, and the reflecting surfaces of any two reflecting mirrors 410 are not coplanar. Thus, after the light beams with different colors are reflected by the beam splitting unit 40, each light beam is equally split into a plurality of sub-light beams with different propagation angles, the beam cross sections of the different sub-light beams can be the same or different, and since the reflection mirror 410 does not change the divergence state of the light beam, each sub-light beam is still a divergent light beam. The beam splitting unit 40 may also be other optical elements, such as a prism, besides the reflector 410, as long as it can split a beam into several beams with different propagation angles. In the present embodiment, the number of sub-beams formed by the beam splitting unit 40 is 2 beams or more.
preferably, the collection angle of the second light passing hole 310 for the light is the same as the light collection angle of the optical system composed of the beam splitting unit 40 and the collimating lens 50. Specifically, the second light passing hole 310 only allows light rays within a light ray collection angle of an optical system formed by the beam splitting unit 40 and the collimating lens 50 to pass through, all the passing light rays can be collimated by the collimating lens 50 and then projected onto the reflector array 60 and emitted out to form a starlight projection effect, and the light rays larger than the collection angle are all absorbed or reflected by the second diaphragm 30, so that stray light is prevented from being generated and the illumination effect is prevented from being influenced.
In the present invention, the sub-beams of the light beams with different colors after passing through the beam splitting unit 40 are collimated by the same collimating lens 50, and the collimated sub-beams are finally incident on the mirror array 60 to form a plurality of projection patterns with various colors. Of course, the light sources 110 with different colors can be turned on alternately or simultaneously to form more projection effects, so as to meet different requirements. In this embodiment, the mirror array 60 includes a plurality of small mirrors 610, preferably, each small mirror 610 is square, and the side length is 1-10mm, and the number of the small mirrors 610 is more than 40, since each small mirror 610 will form an image by projecting the pattern on the pattern sheet, in order to obtain as many projected images as possible, the larger the number of the small mirrors 610 is, the better the number is. The small reflectors 610 may be arranged regularly or in a random manner, the reflecting surfaces of all the small reflectors 610 form a common reflecting surface, the reflecting surface is preferably a curved surface, the curved surface may be a concave surface or a convex surface, the patterns projected by all the small reflectors 610 can be dispersed by arranging the small reflectors into the curved surface, and the curvature of the curved surface can be controlled to control the size of the pattern dispersion range. For example, a large mirror can be cut into a 4mm array of small mirrors and then attached to a curved member to form a curved mirror array. If the beam splitting unit 40 splits a beam of light into M sub-beams and each sub-beam is incident on the mirror array 60, it covers N small mirror units in the mirror array 60, so that each beam can finally project M × N pattern images, and the patterns are dispersed on the projection surface to form a starry lighting effect. In this way, by the beam splitting action of the beam splitting unit 40, the number of projection patterns can be greatly increased with the limited number of small mirrors included in the mirror array 60.
Preferably, the LED starry sky projection lamp further includes a driving mechanism 80 connected to the reflector array 60, and the driving mechanism 80 drives the reflector array 60 to rotate, so as to change the emitting direction of the light, thereby forming a dynamic projection effect.
In summary, the starry sky projection lamp provided by the invention comprises a multicolor light source array 10, a first diaphragm 20, a second diaphragm 30, a collimating lens 50 and a reflector array 60 which are sequentially arranged along a light path, and further comprises a bracket 70 for mounting the multicolor light source array 10, the first diaphragm 20 and the second diaphragm 30, the multicolor light source array 10 comprises a plurality of light sources 110 arranged at intervals and with different colors, the first diaphragm 20 is provided with first light through holes 210 which are corresponding to the light sources 110 in the multicolor light source array 10 one by one and are smaller than the light emitting surfaces of the corresponding light sources 110, the second diaphragm 30 is provided with second light passing holes 310 corresponding to the first light passing holes 210 one to one, the minimum incident angle of the light source 110 projected to the first light passing hole 210 corresponding to the adjacent light source 110 is greater than half of the collection angle of the second light passing hole 310 corresponding to the first light passing hole 210. The multi-color light source array 10 is provided with the plurality of light sources 110 with different colors, so that a starry sky projection effect with various colors can be realized, more projection requirements are met, meanwhile, the first diaphragm 20 is arranged, and the first light through hole 210 with the size smaller than the light emitting surface of the corresponding light source 110 is arranged on the first diaphragm 20, so that the size of a light spot is reduced, more stars are projected, and the projection effect is improved; the second light through hole 310 is arranged on the second diaphragm 30, and the incident angle of the light source 110 projected to the first light through hole 210 corresponding to the adjacent light source 110 is larger than half of the collection angle of the second light through hole 310 corresponding to the first light through hole 210 to light, so that stray light emitted from the first light through hole 210 is well shielded, and the starry sky projection effect is further improved.
Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be within the scope of the invention.
Claims (10)
1. the utility model provides a starry sky projection lamp, its characterized in that includes multicolor light source array, first diaphragm, second diaphragm, collimating lens and the speculum array that sets gradually along the light path, still including being used for the installation the support of multicolor light source array, first diaphragm and second diaphragm, multicolor light source array includes that two at least clearance arrange and the different light source of colour, be equipped with on the first diaphragm with light source one-to-one in the multicolor light source array just is less than the first logical unthreaded hole that leads to the light emitting area of corresponding light source, be equipped with on the second diaphragm with the second unthreaded hole of first logical unthreaded hole one-to-one, the minimum incident angle that the light source projects the first unthreaded hole that adjacent light source corresponds is greater than the second that this first clear hole corresponds and leads to half of the collection angle of light.
2. The starry sky projection lamp as claimed in claim 1, wherein the multi-color light source array includes four light sources of different colors, the light sources being LED light sources or laser light sources.
3. a starry sky projection lamp as claimed in claim 1, wherein a light impermeable layer is provided between two adjacent light sources.
4. The starry sky projection lamp as claimed in claim 1, wherein the light source is coaxially disposed with the corresponding first and second light passing holes.
5. The starry sky projection lamp as claimed in claim 1, wherein the collection angle of the second light through hole to the light is smaller than the collection angle of the corresponding first light through hole to the light.
6. The starry sky projection lamp as claimed in claim 1, wherein the bracket is provided with a groove adapted to the multicolor light source array, a first step adapted to the first diaphragm, and a second step adapted to the second diaphragm, the multicolor light source array is limited in the groove, the first diaphragm is mounted on the first step, and the second diaphragm is mounted on the second step.
7. The starry sky projection lamp as claimed in claim 1, wherein the distance between the first diaphragm and the multicolor light source array is 0.2-1 mm.
8. The starry sky projection lamp as claimed in claim 1, wherein the thickness of the first diaphragm is less than 0.5mm, and the first diaphragm and the second diaphragm are made of opaque material.
9. The starry sky projection lamp as claimed in claim 1, further comprising a beam splitting unit located in front of the collimating lens along the light path, wherein the beam splitting unit is composed of a plurality of mirrors, and the reflecting surfaces of any two mirrors are not coplanar.
10. A starry sky projection lamp as claimed in claim 1, wherein the reflector array comprises a plurality of small reflectors, the plurality of small reflectors forming a curved reflective surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810879129.2A CN108826122B (en) | 2018-08-03 | 2018-08-03 | Starry sky projection lamp |
| PCT/CN2019/077063 WO2019192280A1 (en) | 2018-04-02 | 2019-03-05 | Night projection lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810879129.2A CN108826122B (en) | 2018-08-03 | 2018-08-03 | Starry sky projection lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108826122A CN108826122A (en) | 2018-11-16 |
| CN108826122B true CN108826122B (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810879129.2A Active CN108826122B (en) | 2018-04-02 | 2018-08-03 | Starry sky projection lamp |
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| CN (1) | CN108826122B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019192280A1 (en) * | 2018-04-02 | 2019-10-10 | 超视界激光科技（苏州）有限公司 | Night projection lamp |
| CN110806672B (en) * | 2020-01-07 | 2020-05-22 | 南昌欧菲生物识别技术有限公司 | Projection module, recognition device and mobile terminal |
| CN113494690B (en) * | 2020-04-02 | 2023-06-27 | 中国科学院深圳先进技术研究院 | Illuminator, imaging system and imaging system control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014107981A1 (en) * | 2014-06-05 | 2015-12-17 | Hejtec Gmbh | Device for producing an artificial starry sky |
| CN106813192A (en) * | 2016-11-30 | 2017-06-09 | 佛山市兴华源机械设备有限公司 | A kind of starry sky projector |
| CN207438455U (en) * | 2017-11-17 | 2018-06-01 | 深圳市龙侨华实业有限公司 | A kind of projecting lamp for simulating sky effect |
| CN208546844U (en) * | 2018-08-03 | 2019-02-26 | 佛山市南海区协隆电器有限公司 | A kind of starry sky projector |
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