CN105937749B - Light distribution element, light source assembly and lighting equipment - Google Patents
Light distribution element, light source assembly and lighting equipment Download PDFInfo
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- CN105937749B CN105937749B CN201610452880.5A CN201610452880A CN105937749B CN 105937749 B CN105937749 B CN 105937749B CN 201610452880 A CN201610452880 A CN 201610452880A CN 105937749 B CN105937749 B CN 105937749B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
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Abstract
The invention provides a light distribution element which comprises a diffusion structure and a polarization structure, wherein the diffusion structure is used for diffusing light rays emitted by a light source, the polarization structure is used for deflecting the light rays emitted by the light source, the diffusion structure comprises a first incident surface, a first emergent surface and a first supporting surface, and the first incident surface and the first emergent surface are respectively connected to the first supporting surface; the first incidence plane is a smooth curved surface, and the included angle between the tangent plane of the first incidence plane and the horizontal plane of the light source is increased and then reduced in the direction gradually away from the horizontal plane of the light source. The embodiment of the invention can simultaneously achieve the effects of diffusion and polarization, and the larger the light-emitting angle of the light in the counterclockwise direction of the light angle emitted by the light source, the denser the light emitted by the light distribution element and the stronger the illumination intensity, thereby ensuring the uniform overall brightness of the lighting equipment using the light distribution element.
Description
Technical Field
The invention relates to the field of semiconductor illumination, in particular to a light distribution element, a light source component and illumination equipment.
Background
In recent years, with the increasing awareness of energy conservation and environmental protection, more and more people tend to use LED lighting devices, because of its irreplaceable advantages of long service life, safety, environmental protection, low energy consumption, high luminous efficiency, and the like.
Some lighting devices in the existing market, such as ceiling lamps, usually implement illumination by adding a diffusion mask outside an LED light source, and the light emitted by the lighting devices is easy to generate granular sensation by adopting the light emitting form. Therefore, in order to avoid the light emitted by the lighting device from generating a granular feeling, the prior art usually reserves a large distance between the diffusion mask and the LED light source during the design of the lighting device, and the large distance between the diffusion mask and the LED light source causes the overall thickness of the lighting device. In addition, the adoption of the light emitting mode can increase the board distribution area of the LED, thereby increasing the production cost of the lighting device.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a light distribution element, a light source assembly, and a lighting apparatus that overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a light distribution element including a diffusion structure for diffusing light emitted from a light source and a polarization structure for deflecting the light emitted from the light source, wherein,
the diffusion structure comprises a first incident surface, a first emergent surface and a first supporting surface, wherein the first incident surface and the first emergent surface are respectively connected to the first supporting surface;
the first emergent surface is a smooth curved surface which is concavely arranged in the direction away from the light source, and the ratio of the maximum distance from the first emergent surface to the horizontal plane where the light source is positioned to the width of the first supporting surface is more than 1;
the polarizing structure comprises a second incident surface, a third incident surface, a second supporting surface, a first total reflection surface, at least one second total reflection surface and at least one second emergent surface, wherein the second incident surface is respectively connected to the first incident surface and the third incident surface, and the second supporting surface is respectively connected to the third incident surface and the first total reflection surface;
a first boundary line connecting the first incident surface and the second incident surface, and a second boundary line between the first exit surface and a second exit surface connected to the first exit surface are parallel, and the first boundary line and the second boundary line intersect with an optical axis of the light source, respectively;
a first part of light emitted by the light source enters the light distribution element through the third incidence surface, is totally reflected to the at least one second emergent surface through the first total reflection surface and the at least one second total reflection surface in sequence, and is refracted through the at least one second emergent surface and then is emergent;
and a second part of light emitted by the light source enters the light distribution element through the second incident surface, is totally reflected to the at least one second emergent surface through the at least one second total reflection surface, and is refracted through the at least one second emergent surface and then is emitted.
Optionally, a third part of light of the light source enters the light distribution element through the first incident surface, and is refracted by the first emergent surface and then emitted.
Optionally, the first part of light emitted by the light source has an angle range of 0 to 60 degrees in a counterclockwise direction of the angle of the light emitted by the light source;
the angle range of the second part of light rays emitted by the light source is 60-90 degrees in the anticlockwise direction of the angle of the light rays emitted by the light source;
the third part of light emitted by the light source has an angle range of 90-180 degrees in the counterclockwise direction of the angle of the light emitted by the light source.
Optionally, the light of the first part of light totally reflected to the at least one second total reflection surface by the first total reflection surface is parallel to the optical axis of the light source;
the light rays of the second part of light rays entering the light distribution element through the second incidence surface are parallel to the optical axis of the light source.
Optionally, a distance between the first and second boundary lines is not less than 1.5 millimeters.
Optionally, the first incident surface of the diffusion structure is a smooth curved surface, and an included angle between a tangent plane of the first incident surface and a horizontal plane of the light source is increased and then decreased in a direction gradually away from the horizontal plane of the light source;
the second incidence surface of the polarized light structure is a smooth curved surface which is convexly arranged towards the light source direction, and the included angle between the tangent plane of the second incidence surface and the horizontal plane of the light source is gradually increased in the direction which is gradually far away from the horizontal plane of the light source;
the third incident surface of the polarized light structure is a plane, and the included angle range between the third incident surface of the polarized light structure and the optical axis of the light source is 0-5 degrees.
Optionally, the first total reflection surface of the polarization structure is a smooth curved surface concavely arranged away from the optical axis of the light source, and an included angle between a tangent plane of the first total reflection surface and the optical axis gradually decreases in a direction gradually away from the optical axis, where the included angle ranges from 0 degree to 90 degrees.
Optionally, when the polarization structure includes a plurality of second total reflection surfaces and a plurality of second exit surfaces, the plurality of second total reflection surfaces and the plurality of second exit surfaces are combined into a zigzag structure, one of the second total reflection surfaces and one of the second exit surfaces form a zigzag unit, one end of the zigzag structure is connected to the first exit surface in the diffusion structure, and the other end of the zigzag structure is connected to the first total reflection surface;
the second total reflection surface and the second emergent surface in the sawtooth unit are both of a plane structure, and the included angle between the second total reflection surface and the second emergent surface ranges from 0 degree to 90 degrees.
Optionally, when the polarization structure includes a plurality of second total reflection surfaces and a plurality of second exit surfaces, the polarization structure further includes a connection surface for defining a distance between the zigzag structure and a horizontal plane where the light source is located;
the first total reflection surface is connected to the other end of the sawtooth-shaped structure through a connection surface.
Optionally, when the polarization structure includes one second total reflection surface and one second exit surface, the one second total reflection surface is connected to the first total reflection surface and the one second exit surface respectively, and the one second exit surface is connected to the first exit surface;
the second total reflection surface and the second emergent surface are both of a plane structure, the second emergent surface is overlapped with the optical axis of the light source, and the included angle between the second emergent surface and the second total reflection surface ranges from 0 degree to 90 degrees.
According to another aspect of the present invention, there is also provided a light source assembly, which includes the light distribution element and a plurality of light sources, wherein the first incident surface, the second incident surface and the third incident surface of the light distribution element form an accommodating cavity extending along a length direction of the light distribution element, a substrate disposed along the length direction of the accommodating cavity is accommodated in the accommodating cavity, and the plurality of light sources are uniformly arranged on the substrate along the length direction of the accommodating cavity.
According to another aspect of the present invention, there is provided a lighting device, comprising at least two circuit substrates, at least two sets of the light source assemblies and a chassis, wherein the at least two sets of the light source assemblies are arranged on two opposite sides of the chassis in a mirror image manner through the substrates thereon, so that light rays emitted by the at least two sets of the light source assemblies are deflected towards each other;
the chassis is provided with a face mask, and the at least two groups of light source components are accommodated in the face mask, so that light rays emitted by the at least two groups of light source components are deflected towards each other and then are emitted out through the face mask.
In the embodiment of the invention, the light distribution element comprises a diffusion structure and a polarization structure, wherein the first incident surface of the diffusion structure is a smooth curved surface, and an included angle between a tangent plane of the first incident surface and the horizontal plane of the light source is increased and then decreased in the direction gradually far away from the horizontal plane of the light source, so that the larger the light-emitting angle of the light is, the denser the light emitted by the light distribution element is, the stronger the illumination intensity is, and the uniform brightness of the whole lighting device using the light distribution element is further ensured. In addition, the ratio of the maximum distance between the first emergent surface of the diffusion structure and the horizontal plane where the light source is located to the width of the first supporting surface is larger than 1, so that the light distribution element is lighter and thinner, and manufacturing materials are saved. In addition, the light distribution element is designed into a form that the polarization structure is matched with the diffusion structure, so that the light distribution element can achieve the effects of diffusion and polarization simultaneously.
Further, when the polarization structure comprises a plurality of second total reflection surfaces and a plurality of second emergent surfaces, the second total reflection surfaces and the second emergent surfaces are combined into a zigzag structure, the zigzag structure can effectively reduce the overall height of the light distribution element, the distance between a mask of the lighting equipment using the light distribution element and a light source is reduced, the occupied space of the lighting equipment is saved, and the granular sensation generated by light rays emitted by the lighting equipment can be effectively avoided. In addition, at least two groups of light source components are oppositely arranged, so that light rays emitted by the at least two groups of light source components are deflected towards each other, and a circuit substrate is not required to be arranged between the two groups of light source components, so that the use area of the circuit substrate is saved, and the production cost of the light source components is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural view showing a light distribution element according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the optical path of light rays of a light distribution element according to one embodiment of the present invention;
FIG. 3 shows a schematic view of the light path from a light source to a mask of a lighting device according to one embodiment of the invention;
fig. 4 is a schematic view showing a structure of a light distribution element according to another embodiment of the present invention;
fig. 5 is a schematic view showing a structure of a light distribution element according to still another embodiment of the present invention;
fig. 6 is a schematic view showing the optical paths of light rays of a light distribution element according to still another embodiment of the present invention;
fig. 7 shows a light distribution graph of a light distribution element according to an embodiment of the present invention;
fig. 8 shows a schematic view of the structure of a light source module according to one embodiment of the present invention;
fig. 9 shows a bottom view of the light source assembly according to the embodiment shown in fig. 8;
figure 10 shows a schematic view of a light source module according to another embodiment of the present invention;
fig. 11 shows a schematic view of another angle of the light source module according to the embodiment shown in fig. 10;
fig. 12 shows a bottom view of the light source assembly according to the embodiment shown in fig. 10; and
fig. 13 shows a schematic structural view of a lighting device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the technical problem, the embodiment of the invention provides a light distribution element which can be applied to lighting equipment such as a ceiling lamp, a lamp box and the like.
As shown in fig. 1 and 2, the light distribution element 100 includes two parts, one part is a diffusion structure 10 for diffusing the light 2 emitted from the light source 1, and controls the light 2 emitted from the light source 1 within a range of 90 degrees to 180 degrees in a counterclockwise direction of an angle of the light 2 emitted from the light source 1; the other part is a polarization structure 20 for deflecting the light 2 emitted by the light source 1, and the light 2 emitted by the light source 1 is controlled within the range of 0-90 degrees in the counterclockwise direction of the angle of the light 2 emitted by the light source 1. The material of the light distribution element 100 may be a light transmissive resin such as glass, polymethyl methacrylate (PMMA), Polycarbonate (PC), or epoxy resin (EP).
Referring to fig. 1, the diffusion structure 10 includes a first incident surface 11, a first exit surface 12, and a first supporting surface 13, and the first incident surface 11 and the first exit surface 12 are respectively connected to the first supporting surface 13. The first emergent surface 12 is a smooth curved surface concavely arranged in the direction far away from the light source 1, the included angle between the tangent plane of the first emergent surface 12 and the horizontal plane of the light source 1 is gradually reduced in the direction gradually far away from the horizontal plane of the light source 1, and the ratio of the maximum distance from the first emergent surface 12 to the horizontal plane of the light source 1 to the width of the first supporting surface 13 is greater than 1, so that the light distribution element 100 is lighter and thinner, and the manufacturing materials are saved. In the embodiment of the present invention, the diffusion structure 10 can make the light 2 emitted from the light source 1 emit light with a larger light emitting angle in the counterclockwise direction of the light 2, so that the light 2 emitted from the light distribution element 100 is denser and the illumination intensity is stronger, thereby ensuring that the overall brightness of the lighting device using the light distribution element 100 of this embodiment is uniform.
In this embodiment, the diffusion structure 10 is designed such that the greater the light exit angle of the light 2 in the counterclockwise direction of the angle of the light 2 emitted by the light source 1, the denser the light 2 emitted by the light distribution element 100 is to ensure the uniform brightness of the lighting device using the light distribution element 100, specifically see fig. 2 and 3 and the relationship between the angle of the light 2 emitted by the light source 1 and the illumination intensity of the lighting device at the angle: e ═ I cos 3 Theta/d 2, wherein,
e is the illumination intensity of the lighting device;
i is the illumination intensity of the light source 1;
d is the distance of the light source 1 to the face mask 43 of the luminaire;
theta is an angle from different points on the mask 43 to the center of the light source 1 (i.e. the light-emitting angle of the light ray 2 of the light source 1), and the light-emitting angle of the light ray 2 ranges from 0 degree to 180 degrees.
Since the distance d from the light source 1 to the visor 43 of the lighting device is constant, "cos 3 The value of θ ″ is gradually decreased with the increase of the angle in the range of 0 to 180 degrees, so to ensure the uniform brightness of the face mask 43 of the lighting device at each angle, i.e. the illumination intensity E of the lighting device is not changed, the illumination intensity I of the light source 1 needs to be increased with the increase of the light-emitting angle θ of the light 2. The diffusion structure 10 in the light distribution element 100 according to the embodiment of the present invention can perform secondary light distribution on the light source 1, so that the illumination intensity I of the light source 1 increases with the increase of the light exit angle θ of the light ray 2.
With continued reference to fig. 1, the polarization structure 20 includes a second incident surface 21, a third incident surface 22, a second supporting surface 23, a first total reflection surface 24, at least one second total reflection surface 25, and at least one second exit surface 26. Wherein the second incident surface 21 is connected to the first incident surface 11 and the third incident surface 22, respectively, and the second supporting surface 23 is connected to the third incident surface 22 and the first total reflection surface 24, respectively. The second entrance face 21, the third entrance face 22 of the polarization structure 20 and the first entrance face 11 of the diffusion structure 10 form a receiving cavity (not shown in fig. 1) for receiving the light source 1. In addition, the second supporting surface 23 of the polarization structure 20 and the first supporting surface 13 of the diffusion structure 10 cooperate with each other to support the light distribution element 100.
In this embodiment, first and second incidence surfaces 11 and 21 are parallel to a first boundary line (not shown in fig. 1) connecting in the lengthwise extension direction of light distribution element 100 and a second boundary line (not shown in fig. 1) between first emission surface 12 and second emission surface 26 connecting to first emission surface 12 in the lengthwise extension direction of light distribution element 100, and the first and second boundary lines intersect optical axis 3 of light source 1, respectively. When there are a plurality of light sources 1, that is, a plurality of optical axes 3, the plurality of optical axes 3 each intersect the first boundary line and the second boundary line in the direction extending along the length of the light distribution element 100. Furthermore, first incidence surface 11 and second incidence surface 21 have a smooth transition therebetween in the direction extending along the length of light distribution element 100.
With continued reference to fig. 1 and fig. 2, after a first part of light 201 emitted by the light source 1 and located on the right side of the optical axis 3 of the light source 1 enters the light distribution element 100 through the third incident surface 22, the light is totally reflected to at least one second total reflection surface 25 through the first total reflection surface 24, is totally reflected to at least one second exit surface 26 through the at least one second total reflection surface 25, and is refracted through the at least one second exit surface 26 and then exits; a second part of light 202 emitted by the light source 1 and located on the right side of the optical axis 3 of the light source 1 enters the light distribution element 100 through the second incident surface 21, is totally reflected to the at least one second emergent surface 26 through the at least one second total reflection surface 25, and is refracted through the at least one second emergent surface 26 and then is emitted.
In an alternative embodiment of the present invention, with reference to fig. 2, a third portion of the light beam 203 emitted by the light source 1 and located on the left side of the optical axis 3 of the light source 1 enters the light distribution element 100 through the first incident surface 11, and is refracted through the first emergent surface 12 and then exits.
In an embodiment of the present invention, referring to fig. 4, the polarization structure 20 of the light distribution element 100 includes a plurality of second total reflection surfaces 251 and a plurality of second emission surfaces 261, and the diffusion structure 10 of the light distribution element 100 is the same as the diffusion structure 10 mentioned in the embodiment shown in fig. 1, and details of the diffusion structure 10 of the light distribution element 100 in this embodiment are not repeated herein.
Referring to fig. 4 and the above embodiments, in the embodiment of the present invention, the plurality of second total reflection surfaces 251 and the plurality of second exit surfaces 261 are combined into a zigzag structure, each second total reflection surface 251 and one of the adjacent second exit surfaces 261 form a zigzag unit, one end of the zigzag structure is connected to the first exit surface 12 in the diffusion structure 10, and the other end of the zigzag structure is connected to the first total reflection surface 24. The second total reflection surface 251 and the second exit surface 261 in the sawtooth unit are both planar structures, and an included angle between the second total reflection surface 251 and the second exit surface 261 ranges from 0 degree to 90 degrees, wherein an included angle between the second exit surface 261 and the optical axis 3 of the light source 1 ranges from 0 degree to 5 degrees.
With continued reference to fig. 4, in this embodiment, the first incident surface 11 of the diffusion structure 10 is a smooth curved surface, and an included angle between a tangent plane of the first incident surface 11 and a horizontal plane of the light source 1 increases and then decreases in a direction gradually away from the horizontal plane of the light source 1. The second incident surface 21 of the polarization structure 20 may be a smooth curved surface protruding toward the light source 1, and an included angle between a tangent plane of the second incident surface 21 and a horizontal plane of the light source 1 gradually increases in a direction gradually away from the horizontal plane of the light source 1. The third incident surface 22 of the polarization structure 20 is a plane and has an angle ranging from 0 degree to 5 degrees with the optical axis 3 of the light source 1. Meanwhile, the first total reflection surface 24 of the polarization structure 20 may be designed as a smooth curved surface concavely disposed away from the optical axis 3 of the light source 1, and an included angle between a tangent plane of the first total reflection surface 24 and the optical axis 3 gradually decreases in a direction gradually away from the optical axis 3, where the included angle ranges from 0 degree to 90 degrees.
In this embodiment, referring to fig. 2 and 4, the light ray 2 emitted by the light source 1 is divided into three portions, including a first portion 201 located to the right of the optical axis 3 of the light source 1, a second portion 202, and a third portion 203 located to the left of the optical axis 3 of the light source 1.
After entering the light distribution element 100 through the third incident surface 22, the first part of light 201 is totally reflected by the first total reflection surface 24 to the plurality of second total reflection surfaces 251, totally reflected by the plurality of second total reflection surfaces 251 to the plurality of second exit surfaces 261, and refracted by the plurality of second exit surfaces 261 to exit.
The second part of the light 202 enters the light distribution element 100 through the second incident surface 21, is totally reflected to the second exit surfaces 261 through the second total reflection surfaces 251, and is further refracted by the second exit surfaces 261 and then exits. And, the second part of the light 202 passes through the second incident surface 21, and the first part of the light 201 passes through the third incident surface 22 and the first total reflection surface 24, and then reaches the different second total reflection surfaces 251 in the zigzag structure mentioned in the above embodiments, respectively, wherein the second part of the light 202 is located on the second total reflection surface 251 at the lower position in the zigzag structure, and the first part of the light 201 is located on the second total reflection surface 251 at the upper position in the zigzag structure.
The third part of the light beam 203 enters the light distribution element 100 through the first incident surface 11, and is refracted by the first emission surface 12 and then emitted.
Further, by adjusting the curvatures of the second incident surface 21 and the first total reflection surface 24 (i.e., the curvature of a curve for indicating the degree of deviation of the curve from a straight line), the light that the first part of the light 201 is totally reflected to the plurality of second total reflection surfaces 251 through the first total reflection surface 24 in this embodiment is parallel to the optical axis 3 of the light source 1, the light that the second part of the light 202 is refracted to the plurality of second exit surfaces 261 through the second incident surface 21 is parallel to the optical axis 3 of the light source 1, and then the exit light refracted through the plurality of second exit surfaces 261 can be relatively parallel.
In an alternative embodiment of the present invention, with continued reference to fig. 2, the above-mentioned first portion of light 201, second portion of light 202 and third portion of light 203 emitted from the light source 1 have an angle range of 0-60 degrees, 60-90 degrees and 90-180 degrees respectively in a counterclockwise direction of the angle of the light 2 emitted from the light source 1.
Referring to fig. 4, in the embodiment of the present invention, the polarization structure 20 may further include a connection surface 27, the first total reflection surface 24 is connected to the other end of the zigzag structure through the connection surface 27, the connection surface 27 is used to define a distance between the zigzag structure and a horizontal plane where the light source 1 is located, and a difference between a distance from a second boundary (not shown in fig. 4) between the first emission surface 12 and a second emission surface 261 connected to the first emission surface 12 to the plane where the light source 1 is located and a distance from a first boundary (not shown in fig. 4) connected to the first incident surface 11 and the second incident surface 21 to the plane where the light source 1 is located is not less than 1.5 mm, so as to prevent the light distribution element 100 from being damaged due to a too short distance between the first boundary and the second boundary.
In another embodiment of the present invention, referring to fig. 5, the polarization structure 30 of the light distribution element 200 includes a second total reflection surface 252 and a second emission surface 262, and the diffusion structure 10, the second incident surface 21, the third incident surface 22, the second support surface 23, and the first total reflection surface 24 of the polarization structure 30 of the light distribution element 200 are the same as those of the light distribution element 100 in the embodiment shown in fig. 1 and fig. 4, and details of the diffusion structure 10, the second incident surface 21, the third incident surface 22, the second support surface 23, and the first total reflection surface 24 of the light distribution element 200, and the polarization structure 30 in this embodiment are not repeated.
Referring to fig. 5 and the embodiment shown in fig. 4 above, in this embodiment, one second total reflection surface 252 is connected to the first total reflection surface 24 and one second exit surface 262, respectively, and one second exit surface 262 is connected to the first exit surface 12 in the diffusing structure 10. Here, each of the second total reflection surfaces 252 and the second total reflection surfaces 262 is a planar structure, one of the second total reflection surfaces 262 is coincident with the optical axis 3 of the light source 1, an included angle between one of the second total reflection surfaces 262 and one of the second total reflection surfaces 252 ranges from 0 degree to 90 degrees, and an included angle between the first total reflection surface 24 and one of the second total reflection surfaces 252 ranges from 90 degrees to 180 degrees.
In the embodiment of the present invention, referring to fig. 5 and 6, the light ray 2 emitted from the light source 1 is divided into three parts, including a first part 211 located on the right side of the optical axis 3 of the light source 1, a second part 212, and a third part 213 located on the left side of the optical axis 3 of the light source 1.
After entering the light distribution element 200 through the third incident surface 22, the first part of light 211 is totally reflected to a second total reflection surface 252 through the first total reflection surface 24, totally reflected to a second exit surface 262 through the second total reflection surface 252, and further refracted through the second exit surface 262 to exit.
The second part of the light 212 enters the light distribution element 200 through the second incident surface 21, and is totally reflected to a second emergent surface 262 through a second total reflection surface 252, and further is refracted through the second emergent surface 262 and then is emitted. And, the second part of the light rays 212 pass through the second incident surface 21, and the first part of the light rays 211 pass through the third incident surface 22 and the first total reflection surface 24, and then reach different positions of one second total reflection surface 252, respectively, wherein the second part of the light rays 212 is located at a position above one second total reflection surface 252, and the first part of the light rays 211 is located at a position below one second total reflection surface 252.
The third part of the light 213 enters the light distribution element 200 through the first incident surface 11, and is refracted by the first exit surface 12 and then exits.
Further, by adjusting the curvatures of the second incident surface 21 and the first total reflection surface 24 (i.e., the curvature of the curve, which is used to indicate the degree of deviation of the curve from a straight line), the light that is totally reflected to the second total reflection surface 252 by the first total reflection surface 24 by the first partial light 211 in this embodiment is parallel to the optical axis 3 of the light source 1, and the light that is refracted to the second exit surface 262 by the second incident surface 21 by the second partial light 212 is parallel to the optical axis 3 of the light source 1, so that the exit light refracted by the second exit surface 262 is relatively parallel.
In order to more clearly embody the polarization and diffusion of the light distribution element 100 in the embodiment of the present invention, a light distribution curve diagram of the light distribution element 100 is shown, as shown in fig. 7, a horizontal coordinate value represents a light intensity value, and a coordinate value on a circumference represents a light exit angle of a light ray, and as can be seen from fig. 7, the light exit angle has a light intensity value between-90 degrees and 0 degrees, and thus, the light distribution element in the embodiment of the present invention can implement a polarization effect. When the light-emitting angle of the light emitted by the light distribution element is 0 degree to-75 degrees, the greater the absolute value of the angle is, the stronger the illumination intensity isThe larger the value, according to the above mentioned relation of the illumination intensity: e ═ I cos 3 θ/d2 shows that the luminance of the mask of the lighting device using the light distribution element can be uniform at each angle. Since the light rays in the range of-75 degrees to-90 degrees are used less frequently in practical applications, the illumination intensity in the range of-75 degrees to-90 degrees gradually decreases in the light distribution graph.
Based on the same inventive concept, the embodiment of the present invention further provides a light source assembly 300, and the light source assembly 300 may be applied to lighting apparatuses such as a ceiling lamp, a light box, and the like. As shown in fig. 8 and 9, the light source assembly 300 includes the light distribution element 100 and the plurality of light sources 1 as described in the above embodiments, the first incident surface 11, the second incident surface 21, and the third incident surface 22 of the light distribution element 100 form an accommodating chamber 4 extending along the length direction of the light distribution element 100, a substrate (not shown in fig. 8 and 9) disposed along the length direction of the accommodating chamber 4 is accommodated in the accommodating chamber 4, and the plurality of light sources 1 are uniformly arranged on the substrate along the length direction of the accommodating chamber 4.
The present invention also provides another light source assembly 400, and the light source assembly 400 can be applied to a ceiling lamp, a light box, and other lighting devices. As shown in fig. 10, 11 and 12, the light source assembly 400 includes the light distribution element 200 described in the above embodiment, and a plurality of light sources 1, the first incident surface 11, the second incident surface 21 and the third incident surface 22 of the light distribution element 200 form an accommodating cavity 4 extending along the length direction of the light distribution element 200, a substrate (not shown in fig. 10, 11 and 12) disposed along the length direction of the accommodating cavity 4 is accommodated in the accommodating cavity 4, and the plurality of light sources 1 are uniformly arranged on the substrate along the length direction of the accommodating cavity 4.
Based on the same inventive concept, as shown in fig. 13, the embodiment of the present invention further provides an illumination apparatus 500, and as shown in fig. 8, the illumination apparatus 500 includes at least two sets of the light source assemblies 300 shown in fig. 8 and a bottom chassis 42, and the at least two sets of the light source assemblies 300 are disposed on two opposite sides of the bottom chassis 42 through substrate mirrors thereon, so that the light rays emitted by the at least two sets of the light source assemblies 300 are deflected in opposite directions.
The chassis 42 is provided with a mask 43, and the at least two sets of light source assemblies 300 are accommodated in the mask 43, so that the light rays emitted by the at least two sets of light source assemblies 300 are deflected towards each other and then emitted out through the mask 43. In the present embodiment, the light source assembly 300 of the illumination apparatus 500 may also be replaced with the light source assembly 400 as shown in fig. 10, and is not particularly limited herein.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (12)
1. A light distribution element (100) is characterized by comprising a diffusion structure (10) for diffusing light (2) emitted by a light source (1) and a polarization structure (20) for deflecting the light (2) emitted by the light source (1),
the diffusion structure (10) comprises a first incident surface (11), a first exit surface (12) and a first supporting surface (13), and the first incident surface (11) and the first exit surface (12) are respectively connected to the first supporting surface (13);
the first emergent surface (12) is a smooth curved surface which is concavely arranged in the direction away from the light source (1), and the ratio of the maximum distance from the first emergent surface (12) to the horizontal plane where the light source (1) is located to the width of the first supporting surface (13) is more than 1;
the polarizing structure (20) comprises a second incident surface (21), a third incident surface (22), a second supporting surface (23), a first total reflection surface (24), at least one second total reflection surface (25) and at least one second emergent surface (26), the second incident surface (21) is respectively connected to the first incident surface (11) and the third incident surface (22), and the second supporting surface (23) is respectively connected to the third incident surface (22) and the first total reflection surface (24);
a first boundary line connecting the first entrance surface (11) and the second entrance surface (21), and a second boundary line parallel to the first exit surface (12) and a second exit surface (26) connected to the first exit surface (12), and intersecting the optical axis (3) of the light source (1) respectively;
a first part of light (201) emitted by the light source (1) enters the light distribution element (100) through the third incident surface (22), is totally reflected to the at least one second emergent surface (26) through the first total reflection surface (24) and the at least one second total reflection surface (25) in sequence, and is refracted by the at least one second emergent surface (26) and then is emitted;
a second part of light (202) emitted by the light source (1) enters the light distribution element (100) through the second incidence surface (21), is totally reflected to the at least one second emergent surface (26) through the at least one second total reflection surface (25), and is refracted through the at least one second emergent surface (26) and then is emitted.
2. A light distribution element according to claim 1, wherein a third portion of the light (203) from the light source (1) enters the light distribution element (100) through the first incident surface (11), and is refracted by the first emission surface (12) and then emitted.
3. A light distribution element as claimed in claim 2,
the first part of light (201) emitted by the light source (1) has an angle range of 0-60 degrees in the counterclockwise direction of the angle of the light (2) emitted by the light source (1);
the second part of light (202) emitted by the light source (1) has an angle range of 60-90 degrees in the anticlockwise direction of the angle of the light (2) emitted by the light source (1);
the third part of light (203) emitted by the light source (1) has an angle range of 90-180 degrees in the anticlockwise direction of the angle of the light (2) emitted by the light source (1).
4. A light distribution element as defined in claim 1,
the light of the first part of light (201) totally reflected to the at least one second total reflection surface (25) through the first total reflection surface (24) is parallel to the optical axis (3) of the light source (1);
the light beam entering the light distribution element (100) from the second partial light beam (202) through the second incidence surface (21) is parallel to the optical axis (3) of the light source (1).
5. A light distribution element according to claim 1, wherein a distance between the first boundary line and the second boundary line is not less than 1.5 mm.
6. A light distribution element as claimed in claim 1,
the first incident surface (11) of the diffusion structure (10) is a smooth curved surface, and an included angle formed by a tangent plane of the first incident surface (11) and a horizontal plane of the light source (1) in the direction gradually far away from the horizontal plane of the light source (1) is increased and then reduced;
the second incidence surface (21) of the polarization structure (20) is a smooth curved surface which is convexly arranged towards the direction of the light source (1), and the included angle between the tangent plane of the second incidence surface (21) and the horizontal plane of the light source (1) is gradually increased in the direction which is gradually far away from the horizontal plane of the light source (1);
the third incident surface (22) of the polarizing structure (20) is a plane, and the included angle range between the third incident surface and the optical axis (3) of the light source (1) is 0-5 degrees.
7. A light distribution element as claimed in claim 1,
the first total reflection surface (24) of the polarized light structure (20) is a smooth curved surface which is concavely arranged away from the optical axis (3) of the light source (1), the included angle between the tangent plane of the first total reflection surface (24) and the optical axis (3) is gradually reduced in the direction gradually away from the optical axis (3), and the included angle range is 0-90 degrees.
8. A light distribution element according to claim 1, characterized in that when the polarization structure (20) includes a plurality of second total reflection surfaces (251) and a plurality of second exit surfaces (261), the plurality of second total reflection surfaces (251) and the plurality of second exit surfaces (261) are combined into a zigzag structure, wherein one second total reflection surface (251) and one second exit surface (261) form a zigzag unit, one end of the zigzag structure is connected with the first exit surface (12) in the diffusion structure (10), and the other end is connected with the first total reflection surface (24);
the second total reflection surface (251) and the second emergent surface (261) in the sawtooth unit are both in a plane structure, and the included angle between the second total reflection surface and the second emergent surface is 0-90 degrees.
9. A light distribution element according to claim 8, wherein when the polarization structure (20) includes a plurality of second total reflection surfaces (251) and a plurality of second exit surfaces (261), the polarization structure (20) further includes a connection surface (27);
the first total reflection surface (24) is connected to the other end of the sawtooth structure through a connection surface (27).
10. A light distribution element according to claim 1, characterized in that when the polarization structure (20) includes one second total reflection surface (252) and one second exit surface (262), the one second total reflection surface (252) is connected to the first total reflection surface (24) and the one second exit surface (262), respectively, and the one second exit surface (262) is connected to the first exit surface (12);
the second total reflection surface (252) and the second emergence surface (262) are both planar structures, the second emergence surface (262) is overlapped with the optical axis (3) of the light source (1), and the included angle between the second emergence surface (262) and the second total reflection surface (252) ranges from 0 degree to 90 degrees.
11. A light source assembly (300), comprising: the light distribution element (100) according to any one of claims 1 to 10, and the plurality of light sources (1), wherein the first incidence surface (11), the second incidence surface (21), and the third incidence surface (22) of the light distribution element (100) form a housing cavity (4) extending in a longitudinal direction of the light distribution element (100), a substrate arranged in the longitudinal direction of the housing cavity (4) is housed in the housing cavity (4), and the plurality of light sources (1) are uniformly arranged on the substrate in the longitudinal direction of the housing cavity (4).
12. An illumination device (500), comprising: at least two sets of the light source modules (300) as set forth in claim 11 and the base plate (42), wherein the at least two sets of the light source modules (300) are arranged on two opposite sides of the base plate (42) in a mirror image manner via substrates thereon, so that the light rays emitted from the at least two sets of the light source modules (300) are deflected towards each other;
the chassis (42) is provided with a face shield (43), and the at least two groups of light source assemblies (300) are accommodated in the face shield (43), so that light rays emitted by the at least two groups of light source assemblies (300) are deflected towards each other and then emitted out through the face shield (43).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610452880.5A CN105937749B (en) | 2016-06-21 | 2016-06-21 | Light distribution element, light source assembly and lighting equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610452880.5A CN105937749B (en) | 2016-06-21 | 2016-06-21 | Light distribution element, light source assembly and lighting equipment |
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| CN105937749A CN105937749A (en) | 2016-09-14 |
| CN105937749B true CN105937749B (en) | 2022-09-16 |
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| CN108571709A (en) * | 2017-11-09 | 2018-09-25 | 常州星宇车灯股份有限公司 | Lampshade structure in a kind of wide-angle polarisation |
| CN209926259U (en) * | 2019-03-20 | 2020-01-10 | 法雷奥照明湖北技术中心有限公司 | Optical element and corresponding car light and vehicle |
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| CN103090309B (en) * | 2011-10-28 | 2017-09-19 | 欧司朗股份有限公司 | Lens and the asymmetrical beam distribution of illumination device with the lens |
| CN103206665B (en) * | 2012-01-11 | 2017-07-28 | 欧司朗股份有限公司 | Lens and the lighting device with the lens |
| GB2506138B (en) * | 2012-09-20 | 2014-11-19 | Cooper Technologies Co | Lens and light emitting device incorporating a lens |
| CN105318275B (en) * | 2014-07-31 | 2019-03-12 | 欧普照明股份有限公司 | A kind of lens and the asymmetrical beam distribution of illumination device with the lens |
| CN203980145U (en) * | 2014-07-31 | 2014-12-03 | 欧普照明股份有限公司 | A kind of lens and there is the asymmetrical beam distribution of illumination device of these lens |
| CN205842532U (en) * | 2016-06-21 | 2016-12-28 | 欧普照明股份有限公司 | A kind of light distribution element, light source assembly and luminaire |
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