CN213712775U - Light control device and projection lamp - Google Patents
Light control device and projection lamp Download PDFInfo
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- CN213712775U CN213712775U CN202022532761.5U CN202022532761U CN213712775U CN 213712775 U CN213712775 U CN 213712775U CN 202022532761 U CN202022532761 U CN 202022532761U CN 213712775 U CN213712775 U CN 213712775U
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Abstract
The utility model discloses a accuse light device and projecting lamp. The light control device comprises a light reflecting cup and a light source, the light reflecting cup comprises a free-form surface reflecting surface, a light emitting surface of the light source faces the free-form surface reflecting surface, an optical axis of the light source is perpendicular to a central axis of the light reflecting cup, the free-form surface reflecting surface is used for projecting light rays emitted by the light source to a preset light projection surface and forming light spots on the preset light projection surface, an included angle between the central axis and a projection direction is theta 1, wherein the theta 1 is more than 0 degree and less than 90 degrees, and the projection direction is perpendicular to the preset light projection surface. The light control device and the projection lamp provided by the utility model project the light emitted by the light source to the preset projection surface by arranging the free-form surface reflecting surface, and the light emitted by the light source is only transmitted in the air, so that no Fresnel loss exists, and the light utilization rate is improved; the included angle theta 1 between the central shaft and the projection direction is set to meet the requirements that theta 1 is more than 0 degree and less than 90 degrees, the requirements of different light-emitting angles of the projection lamp are met, and the light utilization rate is further improved.
Description
Technical Field
The embodiment of the utility model provides a relate to the lighting technology field, especially relate to a accuse light device and projecting lamp.
Background
The LED projection lamp is called as spot lamp, projection lamp, etc. and is mainly used for single building, outer wall illumination of historical building group, inner and outer light transmission illumination of building, indoor local illumination, greening landscape illumination, billboard illumination, special facility illumination of medical culture, etc., atmosphere illumination of entertainment places such as bar, dance hall, etc.
The light that current LED projecting lamp adopted lens to send the light source to throw to the wall usually, but because lens utilize the refractivity difference (be snell's law) of different materials with the light that the light source sent on the wall, light is after lens, because lens and air have the refractivity difference, so can produce the fresnel loss, light utilization ratio is lower. In addition, when light exits the lens, surface scattering occurs on the lens surface, which causes glare.
SUMMERY OF THE UTILITY MODEL
The utility model provides a accuse light device and projecting lamp to when promoting light utilization ratio, reduce the glare.
In a first aspect, the embodiment of the present invention provides a light control device for a projection lamp, the light control device includes:
a light reflecting cup and a light source;
the light reflecting cup comprises a free-form surface reflecting surface, the light emitting surface of the light source faces the free-form surface reflecting surface, and the optical axis of the light source is perpendicular to the central axis of the light reflecting cup; the free-form surface reflecting surface is used for projecting light rays emitted by the light source to a preset light projection surface and forming light spots on the preset light projection surface;
the included angle between the central axis and the projection direction is theta 1, wherein theta 1 is more than 0 degree and less than 90 degrees, and the projection direction is perpendicular to the preset light projection surface.
Optionally, the light emitting angle of the light control device is θ 2, where θ 2/2 < θ 1 < 90 °.
Optionally, 1.2 < 2 × θ 1/θ 2 < 1.6.
Optionally, the light emitting surface of the light source includes N sub light emitting surfaces, the free-form surface reflecting surface includes N sub reflecting surfaces, the preset light emitting surface includes N sub light emitting surfaces, the N sub light emitting surfaces correspond to the N sub reflecting surfaces one to one, and the N sub reflecting surfaces correspond to the N sub light emitting surfaces one to one; the light emitted by each sub light emitting surface is reflected to a corresponding sub light emitting surface through a corresponding sub reflecting surface; the sub-reflecting surface comprises a plurality of first boundary vertexes, the sub-light projecting surface comprises a plurality of second boundary vertexes, the first boundary vertexes and the second boundary vertexes are in one-to-one correspondence, and the sub-reflecting surface satisfies the following conditions:
wherein N is a positive integer greater than 1,
is the vector of the incident light from the light source to the first boundary vertex,
the emergent light vector from the first boundary vertex to the corresponding second boundary vertex,
is the normal vector of the free-form surface reflector at the vertex of the first boundary.
Optionally, the sub-reflecting surfaces include a first sub-reflecting surface and a second sub-reflecting surface, the first sub-reflecting surface and the second sub-reflecting surface are respectively located on two sides of the central light beam, the sub-light-projecting surfaces include a first sub-light-projecting surface and a second sub-light-projecting surface, the first sub-light-projecting surface and the second sub-light-projecting surface are respectively located on two sides of the central light beam, the first sub-reflecting surface and the first sub-light-projecting surface are located on the same side of the central light beam, the second sub-reflecting surface and the second sub-light-projecting surface are located on the same side of the central light beam, and the central light beam is a light beam obtained by reflecting a light beam emitted from the light source along an optical axis by the free-form surface reflecting surface;
the first sub-reflecting surfaces correspond to the second sub-light projecting surfaces one by one, and the second sub-reflecting surfaces correspond to the first sub-light projecting surfaces one by one.
Optionally, the luminous fluxes of the sub light emitting surfaces are equal, and the areas of the sub light emitting surfaces are equal.
Optionally, the shape of the preset light projection surface is a symmetrical figure.
Optionally, the light control device further includes a light source fixing structure, one end of the light source fixing structure is fixed to one end of the light reflecting cup, and the other end of the light source fixing structure extends to above the free-form surface reflecting surface;
the light source is arranged on one side, facing the free-form surface reflecting surface, of the light source fixing structure.
In a second aspect, the embodiment of the present invention further provides a projector, including the first aspect, any light control device.
Optionally, the projector further comprises a housing;
the housing comprises a fixation structure for fixing the light control device in the housing.
The embodiment of the utility model provides a accuse light device can be applied to the projecting lamp in order to realize spotlight illumination function, includes the free-form surface plane of reflection through setting up anti-light cup, and the play plain noodles of light source is towards the free-form surface plane of reflection, and the optical axis perpendicular to anti-light cup's of light source center pin for the light that sends of light source all incides the free-form surface plane of reflection, thereby makes the outgoing direction of the whole light that anti-light cup can control the light source and send, has higher accuse light ability. The light rays emitted by the light source are projected to the preset light projection surface through the free-form surface reflecting surface, and the light rays emitted by the light source are only transmitted in the air, so that Fresnel loss can not exist, and the light utilization rate is improved. The included angle theta 1 between the central shaft and the projection direction is set to meet the requirements that theta 1 is more than 0 degree and less than 90 degrees, the requirements of different light-emitting angles of the projection lamp are met, and the light utilization rate is further improved.
Drawings
Fig. 1 and 2 are schematic structural views of a conventional projector;
fig. 3 is a schematic structural diagram of a light control device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another light control device according to an embodiment of the present invention;
fig. 5 is a schematic view of a light spot provided by an embodiment of the present invention;
fig. 6 is a schematic structural view of a light emitting surface of a light source according to an embodiment of the present invention;
fig. 7 is a schematic partial structural view of a light control device according to an embodiment of the present invention;
fig. 8 is a schematic partial sectional view of a light control device according to an embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of a light control device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another light control device according to the present invention;
fig. 11 is a schematic structural diagram of a projector lamp provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 and 2 are the schematic structural diagram of a prior art projection lamp, refer to fig. 1 and 2, and this projection lamp includes lens 10 and light source 11 that sets up in lens 10 bottom, and lens 10 has the polarization design of certain degree, utilizes the refractive index difference of different materials, projects the light that light source 11 sent on wall 12 to realize the illumination effect of throwing light. In current projecting lamp, the light that light source 11 sent has still passed through lens 10 except the air, because there is refractive index difference between lens 10 and the air, can produce the fresnel loss, and light utilization ratio is lower, and in addition, when light was emergent by lens 10, still can take place the surface scattering on lens 10 surface, causes and dazzles light.
Based on the technical problem, the embodiment of the utility model provides a accuse light device for the projecting lamp, this accuse light device include anti-light cup and light source, anti-light cup includes the free-form surface plane of reflection, and the play plain noodles of light source is towards the free-form surface plane of reflection, and the optical axis perpendicular to anti-light cup's of light source center pin. The free-form surface reflecting surface is used for projecting light rays emitted by the light source to the preset light projection surface and forming light spots on the preset light projection surface. The included angle between the central axis and the projection direction is theta 1, wherein theta 1 is more than 0 degree and less than 90 degrees, and the projection direction is vertical to the preset light projection surface.
Adopt above-mentioned technical scheme, the embodiment of the utility model provides a light control device can be applied to the projecting lamp in order to realize spotlight illumination function, includes the free-form surface plane of reflection through setting up anti-light cup, and the play plain noodles of light source is towards the free-form surface plane of reflection, and the optical axis perpendicular to anti-light cup's of light source center pin for the light that sends of light source all incides the free-form surface plane of reflection, thereby makes anti-light cup can control the emitting direction of the whole light that the light source sent, has higher accuse light ability. The light rays emitted by the light source are projected to the preset light projection surface through the free-form surface reflecting surface, and the light rays emitted by the light source are only transmitted in the air, so that Fresnel loss can not exist, and the light utilization rate is improved. The included angle theta 1 between the central shaft and the projection direction is set to meet the requirements that theta 1 is more than 0 degree and less than 90 degrees, the requirements of different light-emitting angles of the projection lamp are met, and the light utilization rate is further improved.
Above is the core thought of the utility model, will combine the attached drawing in the embodiment of the utility model below, to the technical scheme in the embodiment of the utility model clearly, describe completely. Based on the embodiments in the present invention, under the premise that creative work is not done by ordinary skilled in the art, all other embodiments obtained all belong to the protection scope of the present invention.
Fig. 3 is the embodiment of the utility model provides a structural schematic diagram of a accuse light device, as shown in fig. 3, the embodiment of the utility model provides a accuse light device is used for the projecting lamp, and this accuse light device includes anti-light cup 20 and light source 21, and anti-light cup 20 includes free-form surface plane of reflection 201, and the play plain noodles of light source 21 is towards free-form surface plane of reflection 201, and the optical axis 211 of light source 21 is perpendicular to anti-light cup 20's center pin 202. The free-form surface 201 is configured to project light emitted from the light source 21 to the predetermined light projecting surface 22, and form a light spot on the predetermined light projecting surface 22. The included angle between the central axis 202 and the projection direction 30 is θ 1, wherein θ 1 is greater than 0 degree and less than 90 degrees, and the projection direction 30 is perpendicular to the predetermined light projection plane 22.
Specifically, the inner side wall of the reflective cup 20 is a free-form surface reflective surface 201, the light-emitting surface of the light source 21 faces the free-form surface reflective surface 201, the optical axis 211 of the light source 21 is perpendicular to the central axis 202 of the reflective cup 20, and the light source 21 is located at the intersection point of the optical axis 211 and the central axis 202, so that the light emitted by the light source 21 is incident on the free-form surface reflective surface 201, and the reflective cup 20 can control the emitting direction of all the light emitted by the light source 21, and has high light control capability.
The free-form surface reflecting surface 201 is determined by parameters of the light emitting surface of the light source 21 and output parameters of the preset light projecting surface 22, so that light rays emitted by the light source 21 are projected to the preset light projecting surface 22 through the free-form surface reflecting surface 201 to form light spots according to the lighting requirements. The light emitted by the light source 21 is directly reflected to the preset light projection surface 22 through the free-form surface reflecting surface 201 by utilizing the mirror reflection law of the free-form surface reflecting surface 201, and the light emitted by the light source 21 is only transmitted in the air, so that Fresnel loss does not exist, and the light utilization rate is improved. The predetermined light-projecting surface 22 can be defined according to actual needs to meet the requirements of different lighting scenes.
The embodiment of the utility model provides a accuse light device is applicable to the projecting lamp, and the projecting lamp has the luminous angle specification of a lot of differences, satisfies 0 through the center pin 202 that sets up anti-light cup 20 and throws contained angle theta 1 between the direction 30 and theta 1 < 90 to the different luminous angle demands of cooperation projecting lamp help further improving light utilization ratio, and wherein, the projection surface 22 is predetermine to the projection direction 30 perpendicular to of projecting lamp.
It should be noted that the free-form surface 201 may be a plated surface to improve the light reflection efficiency, for example, the free-form surface 201 is plated with aluminum to improve the light reflection efficiency, and in other embodiments, other techniques may be used to improve the light reflection efficiency, which is not limited by those skilled in the art. The light source 21 may be LED, or any other light source, and those skilled in the art can set the light source according to actual needs.
The embodiment of the utility model provides a accuse light device, can be applied to the projecting lamp in order to realize spotlight illumination function, include free-form surface plane of reflection 201 through setting up anti-light cup 20, the play plain noodles of light source 21 is towards free-form surface plane of reflection 201, and the optical axis 211 perpendicular to anti-light cup 20's of light source 21 center pin 202, make the light that sends of light source 21 all incide free-form surface plane of reflection 201, thereby make anti-light cup 20 can control the emitting direction of the whole light that light source 21 sent, higher accuse light ability has. By arranging the free-form surface reflecting surface 201 to project the light rays emitted by the light source 21 to the preset light projection surface 22, the light rays emitted by the light source 21 are only transmitted in the air, so that Fresnel loss does not exist, and the improvement of the light ray utilization rate is facilitated. The included angle theta 1 between the central shaft 202 and the projection direction 30 is set to meet the requirements that theta 1 is larger than 0 degree and smaller than 90 degrees, and the light utilization rate is further improved by matching with the requirements of different light-emitting angles of the projection lamp.
Fig. 4 is a schematic structural view of another light control device provided by the embodiment of the present invention, and fig. 5 is a schematic view of a light spot provided by the embodiment of the present invention, as shown in fig. 4 and fig. 5, it is optional, the light emitting angle of the light control device provided by the embodiment of the present invention is θ 2, wherein θ 2/2 < θ 1 < 90 °.
The light emitting angle θ 2 is an included angle of the light beam with the light intensity of 1/5 as the peak light intensity. Specifically, referring to fig. 4 and 5, taking a circular light spot as an example, the light control device projects light emitted by the light source 21 to the preset light projection surface 22 through the free-form surface reflection surface 201 to form the light spot 31, and the light emitting angle θ 2 is an angle formed between the light control device and a boundary line 32 at 20% light intensity after normalization of the light spot 31.
With continuing reference to fig. 4 and 5, if the included angle θ 1 between the central axis 202 of the reflective cup 20 and the projection direction 30 is set, the maximum included angle that the light beam projected by the light control device can reach is 2 × θ 1, so that the light emitting angle of the light control device is set to θ 2 to satisfy θ 2/2 < θ 1 < 90 °, and the light control device is ensured to satisfy the light emitting angle requirement of the projector.
Optionally, 1.2 < 2 × θ 1/θ 2 < 1.6.
Wherein, satisfy 1.2 < 2 theta 1/theta 2 < 1.6 between the contained angle theta 1 between central axis 202 and the direction of projection 30 and the luminous angle theta 2 of accuse light device through setting up, when guaranteeing that accuse light device can satisfy the luminous angle demand of projecting lamp, reflector cup 20 can also play the effect of sheltering from wide-angle light to avoid producing and dazzle light.
Illustratively, the included angle θ 1 between the central axis 202 and the projection direction 30 is set to 40 °, so that the light control device is suitable for a projector with a light emitting angle of 50 °.
In other embodiments, a person skilled in the art may design the included angle θ 1 between the central axis 202 and the projection direction 30 and the light emitting angle θ 2 of the light control device according to factors such as the transition form of the light spot, the anti-glare angle requirement in general situations, and the feeling of the customer, for example, design 2 × θ 1/θ 2 — 4/3, and the embodiment of the present invention does not limit this.
Fig. 6 is a schematic diagram of a structure of a light-emitting surface of a light source provided by an embodiment of the present invention, fig. 7 is a schematic diagram of a partial structure of a light-controlling device provided by an embodiment of the present invention, fig. 8 is a schematic diagram of a partial cross-sectional structure of a light-controlling device provided by an embodiment of the present invention, optionally, the light-emitting surface 40 of the light source 21 includes N sub light-emitting surfaces 401, the free-form surface reflecting surface 201 includes N sub light-reflecting surfaces 41, the predetermined light-emitting surface 22 includes N sub light-emitting surfaces 221, the N sub light-emitting surfaces 401 correspond to the N sub light-reflecting surfaces 41 one by one, the N sub light-reflecting surfaces 41 correspond to the N sub light-emitting surfaces 221 one by one, the light emitted from each sub light-emitting surface 401 is reflected to a corresponding sub light-emitting surface 221 through a corresponding sub light-reflecting surface 41, the sub light-reflecting surface 41 includes a plurality of first boundary vertices 411, the sub light-emitting surface 221 includes a plurality, the sub-reflecting surface 41 satisfies:
wherein N is a positive integer greater than 1,
is the vector of the incident light from light source 21 to first boundary vertex 411,
the vectors of the outgoing light from the first boundary vertex 411 to the corresponding second boundary vertex 42,
is the normal vector of the free-form surface 201 at the first boundary vertex 411.
Specifically, after an included angle θ 1 between the central axis 202 and the projection direction 30 is determined according to a light emitting angle θ 2 of the light control device, the free-form surface reflecting surface 201 is obtained by applying a related energy distribution mathematical expression.
For example, the free-form surface 201 is designed according to the range of the preset light-projecting surface 22, and the preset light-projecting surface 22 can be defined according to the actually required spot size to meet the requirements of different lighting scenes. The light emitting surface 40 of the light source 21 includes N sub light emitting surfaces 401, the free-form surface reflecting surface 201 includes N sub reflecting surfaces 41, the preset light emitting surface 22 includes N sub light emitting surfaces 221, the N sub light emitting surfaces 401 correspond to the N sub reflecting surfaces 41 one by one, the N sub reflecting surfaces 41 correspond to the N sub light emitting surfaces 221 one by one, and light emitted from each sub light emitting surface 401 is reflected to a corresponding sub light emitting surface by a corresponding sub reflecting surface 41. Where N is a positive integer greater than 1, it can be understood that if the number of divided parts of the light emitting surface 40 of the light source 21, the predetermined light projecting surface 22 and the free-form surface reflecting surface 201 is too small, the precision requirement may not be met, and the number of divided parts is more, the precision is higher theoretically, however, the actual processing may not meet the requirement, and in the embodiment, N may be designed to be 20 or more and less than 2000. In other embodiments, for example, when the requirement on the illumination precision of the light beam is low, N may also be designed to be less than 20, so as to reduce the calculation and processing difficulty; when the requirement on the precision of light beam illumination is high, the numerical value of N can be designed to be larger than 2000, so that a finer free-form surface reflecting surface can be processed, and the illumination requirements of some special fields are met.
With continued reference to fig. 7, the sub-reflecting surface 41 includes a plurality of first boundary vertices 411, the predetermined light-projecting surface 22 includes a plurality of second boundary vertices 42, the first boundary vertices 411 correspond to the second boundary vertices 42 one-to-one, the first boundary vertices 411 are intersections between the sub-reflecting surface 41 and common edges of the sub-reflecting surfaces 41 adjacent thereto, and the second boundary vertices 42 are intersections between the sub-light-projecting surfaces 221 and common edges of the sub-light-projecting surfaces 221 adjacent thereto.
Illustratively, as shown in fig. 7 and 8, one sub-reflecting surface 41 includes four first boundary vertices 411, one sub-light-projecting surface 221 also includes four second boundary vertices 42, the four first boundary vertices 411 of the sub-reflecting surface 41 correspond to the four second boundary vertices 42 of the corresponding sub-light-projecting surface 221 one-to-one, and referring to fig. 8, the first boundary vertices 411 of the sub-reflecting surface 41 are respectively P0-P6The second boundary vertices 42 of the sub light projection surface 221 are y0-y6First boundary vertex P0-P6And the second boundary vertex y0-y6One-to-one correspondence, the sub-reflecting surfaces 41 are arranged to satisfy
Is the incident light vector from light source 211 to first boundary vertex 411,
is the first boundary vertex411 to the corresponding second boundary vertex 42,
is the normal vector of the free-form surface 201 at the first boundary vertex 411. For example, as shown in FIG. 8, at the first boundary vertex P0At the position of the air compressor, the air compressor is started,
from the light source 21 to the first boundary vertex P0Is measured in the direction of the incident light vector of (c),
is a first boundary vertex P0To the corresponding second boundary vertex y0The vector of the outgoing light of (a),
is a free-form surface of the reflecting surface 201 at a first boundary vertex P0So that the light source 21 is along
The light emitted in the angular direction passes through the first boundary vertex P of the sub-reflecting surface 410Is reflected to the second boundary vertex y of the sub light-projecting surface 2210Similarly, the light source 211 is along
The light emitted in the angular direction passes through the first boundary vertex P of the sub-reflecting surface 411Is reflected to the second boundary vertex y of the sub light-projecting surface 2211In this way, by making the N sub light emitting surfaces 401 correspond to the N sub reflecting surfaces 41 one by one, and making the N sub reflecting surfaces 41 correspond to the N sub light projecting surfaces 221 one by one, the light emitted from the light source 211 is distributed to the predetermined light projecting surface 22, and thus the predetermined light projecting surface 22 is formedForming a projected spot of light.
Fig. 9 is a schematic cross-sectional view of a light control device according to an embodiment of the present invention, as shown in fig. 9, optionally, the sub-reflecting surface 41 includes a first sub-reflecting surface 412 and a second sub-reflecting surface 413, the first sub-reflecting surface 412 and the second sub-reflecting surface 413 are respectively located at two sides of the central light beam 44, the sub-light projection surface 221 includes a first sub-light projection surface 2211 and a second sub-light projection surface 2212, the first sub-light projection surface 2211 and the second sub-light projection surface 2212 are respectively located at two sides of the central light beam 44, the first sub-reflecting surface 412 and the first sub-light projecting surface 2211 are located on the same side of the central light beam 44, the second sub-reflecting surface 413 and the second sub-light projecting surface 2212 are located on the same side of the central light beam 44, the central light beam 44 is a light beam emitted by the light source 21 along the optical axis 211 and reflected by the free-form surface reflecting surface 203, the first sub-reflecting surfaces 412 and the second sub-light projecting surfaces 2212 are in one-to-one correspondence, and the second sub-reflecting surfaces 412 and the first sub-light projecting surfaces 2211 are in one-to-one correspondence.
As shown in fig. 9, the first sub-reflecting surface 412 and the first sub-light projecting surface 2211 are above the central light beam 44, the second sub-reflecting surface 413 and the second sub-light projecting surface 2212 are below the central light beam 44, the first sub-reflecting surface 412 and the second sub-light projecting surface 2212 are in one-to-one correspondence, and the second sub-reflecting surface 413 and the first sub-light projecting surface 2211 are in one-to-one correspondence, specifically, the light source 21 is along the edge of the light source 21
The light emitted in the angular direction passes through the first boundary vertex P of the sub-reflecting surface 416Is reflected to the second boundary vertex y of the sub light-projecting surface 221-6At the light source 21
The light emitted in the angular direction passes through the first boundary vertex P of the sub-reflecting surface 415Is reflected to the second boundary vertex y of the sub light-projecting surface 221-5And so on, so as to distribute the light emitted from the light source 21 to the predetermined light projecting surface 22 via the free-form surface 203, thereby forming a projected light spot on the predetermined light projecting surface 22. The light emitted from the light source 21 is reflected to the lower part of the central light beam 44 by the first sub-reflecting surface 412 arranged above the central light beam 44The square second sub-light projection surface 2212 and the second sub-reflection surface 413 below the central light beam 44 reflect the light emitted by the light source 21 to the first sub-light projection surface 2211 above the central light beam 44, so that part of the light is prevented from being shielded by the light source 21, and the utilization rate of the light source is improved.
Optionally, the luminous fluxes of the sub light emitting surfaces 401 are all equal, and the areas of the sub light emitting surfaces 221 are all equal.
The N sub light-emitting surfaces 401 correspond to the N sub reflection surfaces 41 one to one, and the luminous fluxes of each sub light-emitting surface 401 are all set to be equal, so that the luminous fluxes received by each sub light-projecting surface 221 are equal, the N sub reflection surfaces 41 correspond to the N sub light-projecting surfaces 221 one to one, so that the luminous fluxes received by each sub light-projecting surface 221 are equal, the areas of each sub light-projecting surface 221 are all set to be equal, so that the light intensity of each sub light-projecting surface 221 is equal, so that the light control device forms light spots with uniform intensity distribution on the preset light-projecting surface 22, and the illumination effect is improved.
Optionally, the shape of the predetermined light projecting surface 22 is a symmetrical figure.
Wherein, through setting up the shape of predetermineeing light-projecting surface 22 into the symmetrical figure to make light control device form symmetrical facula on predetermineeing light-projecting surface 22, thereby satisfy the lighting needs of projecting lamp, for example, set up the shape of predetermineeing light-projecting surface 22 into circular, square, rectangle etc. and skilled person in the art can set up according to actual demand.
In other embodiments, the shape of the predetermined light-projecting surface 22 may also be set to be an asymmetric pattern to meet the corresponding lighting requirement, which is not limited by the embodiment of the present invention.
Fig. 10 is a schematic structural view of another light control device provided in the present invention, as shown in fig. 10, optionally, the light control device provided in the embodiment of the present invention further includes a light source fixing structure 23, one end of the light source fixing structure 23 is fixed at one end of the reflective cup 20, and the other end of the light source fixing structure 23 extends to above the free-form surface reflective surface; the light source is disposed on a side of the light source fixing structure facing the free-form surface reflecting surface 201.
Specifically, as shown in fig. 10, the light source fixing structure 23 is used for fixing the light source 21 on a side facing the free-form surface reflection surface 201, and a light emitting surface of the light source 21 faces the free-form surface reflection surface 201. The light source fixing structure 23 may be integrated with a driving circuit of the light source 21, for example, the light source fixing structure 23 is a circuit board, and the circuit board covers a partial area of the free-form surface 201 in a direction perpendicular to a plane of the circuit board.
The embodiment of the utility model provides a light control device is applicable to hidden lamps and lanterns, also is applicable to general exposed lamps and lanterns. By using the fully-coated reflecting cup 20 of the back-beating type, the included angle θ 1 between the central axis 202 and the projection direction 30 is determined according to the light emitting angle θ 2 of the light control device, and the free-form surface reflecting surface 201 of the reflecting cup 20 is obtained by applying a related energy distribution mathematical expression, so that light is projected to the preset light projection surface 22 in a crossed light emitting manner, and partial light is prevented from being shielded by the light source 21. Compare with traditional total reflection lens, the embodiment of the utility model provides a light-emitting efficiency of accuse light device can reach more than 90%, possesses the advantage of high accuse light ability, high efficiency and low glare simultaneously.
Based on same inventive concept, the embodiment of the present invention also provides a projecting lamp, fig. 11 is the embodiment of the present invention provides a structural schematic diagram of a projecting lamp, as shown in fig. 11, this projecting lamp 50 includes the light control device 51 according to any embodiment of the present invention, therefore, the embodiment of the present invention provides a projecting lamp 50 having the technical effect of the technical solution in any embodiment, which is the same as or corresponding to the above-mentioned embodiment, and the explanation of the structure and the term is not repeated herein.
With continued reference to fig. 11, optionally, the projector 50 provided by the embodiment of the present invention further includes a housing 52, the housing 52 includes a fixing structure 521, and the fixing structure 521 is used to fix the light control device 51 in the housing 52.
Wherein, the shell 52 plays the guard action to the light control device 51, as shown in fig. 11, the shell 52 further includes a transparent plate 522, the transparent plate 522 is located on the light beam outgoing path of the light control device 51, the transparent plate 522 can adopt a glass plate to avoid high temperature deformation, in other embodiments, a person skilled in the art can set the shape and the material of the shell 52 according to actual needs, the embodiment of the present invention does not limit this.
It should be noted that the embodiment of the present invention provides a projector 50, which can further include any other components that help to realize the spotlight function, for example, as shown in fig. 11, the projector 50 further includes a heat sink 24, the heat sink 24 is disposed near the light source 21, so as to prevent the light source 21 from being too hot and damaging the projector 50, and those skilled in the art can set the projector 50 according to actual requirements.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a accuse light device for projecting lamp, its characterized in that includes:
a light reflecting cup and a light source;
the light reflecting cup comprises a free-form surface reflecting surface, the light emitting surface of the light source faces the free-form surface reflecting surface, and the optical axis of the light source is perpendicular to the central axis of the light reflecting cup; the free-form surface reflecting surface is used for projecting light rays emitted by the light source to a preset light projection surface and forming light spots on the preset light projection surface;
the included angle between the central axis and the projection direction is theta 1, wherein theta 1 is larger than 0 degree and smaller than 90 degrees, and the projection direction is perpendicular to the preset light projection surface.
2. A light management device according to claim 1, wherein the light management device emits light at an angle θ 2, wherein θ 2/2 < θ 1 < 90 °.
3. A light management device according to claim 2, wherein 1.2 < 2 x θ 1/θ 2 < 1.6.
4. The light control device according to claim 1, wherein the light emitting surface of the light source includes N sub light emitting surfaces, the free-form surface reflector includes N sub reflector surfaces, the predetermined light projecting surface includes N sub light projecting surfaces, N sub light emitting surfaces correspond to N sub reflector surfaces one to one, and N sub reflector surfaces correspond to N sub light projecting surfaces one to one; the light emitted by each sub light emitting surface is reflected to a corresponding sub light emitting surface through a corresponding sub reflecting surface; the sub-reflecting surface comprises a plurality of first boundary vertexes, the sub-light projecting surface comprises a plurality of second boundary vertexes, the first boundary vertexes and the second boundary vertexes are in one-to-one correspondence, and the sub-reflecting surface satisfies the following conditions:
wherein N is a positive integer greater than 1,
is the vector of the incident light from the light source to the first boundary vertex,
the emergent light vector from the first boundary vertex to the corresponding second boundary vertex,
is the normal vector of the free-form surface reflector at the vertex of the first boundary.
5. The light control device according to claim 4, wherein the sub-reflection surfaces include a first sub-reflection surface and a second sub-reflection surface, the first sub-reflection surface and the second sub-reflection surface are respectively located at two sides of a central light beam, the sub-light projection surfaces include a first sub-light projection surface and a second sub-light projection surface, the first sub-light projection surface and the second sub-light projection surface are respectively located at two sides of the central light beam, the first sub-reflection surface and the first sub-light projection surface are located at the same side of the central light beam, the second sub-reflection surface and the second sub-light projection surface are located at the same side of the central light beam, and the central light beam is a light beam emitted from the light source along an optical axis and reflected by the free-form surface reflection surface;
the first sub-reflecting surfaces correspond to the second sub-light projecting surfaces one by one, and the second sub-reflecting surfaces correspond to the first sub-light projecting surfaces one by one.
6. The light control device according to claim 4, wherein the luminous flux of each of the sub light emitting surfaces is equal, and the area of each of the sub light emitting surfaces is equal.
7. The light control device of claim 1, wherein the predetermined light projecting surface is shaped as a symmetrical figure.
8. The light control device of claim 1, further comprising a light source fixing structure, one end of the light source fixing structure being fixed to one end of the reflective cup, and the other end of the light source fixing structure extending above the free-form surface;
the light source is arranged on one side, facing the free-form surface reflecting surface, of the light source fixing structure.
9. A light projector comprising the light control device of any one of claims 1-8.
10. The light projector of claim 9 further comprising a housing;
the housing comprises a fixation structure for fixing the light control device in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022532761.5U CN213712775U (en) | 2020-11-05 | 2020-11-05 | Light control device and projection lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022532761.5U CN213712775U (en) | 2020-11-05 | 2020-11-05 | Light control device and projection lamp |
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| Publication Number | Publication Date |
|---|---|
| CN213712775U true CN213712775U (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022532761.5U Active CN213712775U (en) | 2020-11-05 | 2020-11-05 | Light control device and projection lamp |
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| Country | Link |
|---|---|
| CN (1) | CN213712775U (en) |
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- 2020-11-05 CN CN202022532761.5U patent/CN213712775U/en active Active
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