CN105202394B

CN105202394B - Lens combination and lighting device using same

Info

Publication number: CN105202394B
Application number: CN201510697146.0A
Authority: CN
Inventors: 刘超博; 邓诗涛; 杨静; 李建国; 师修风
Original assignee: Opple Lighting Co Ltd
Current assignee: Opple Lighting Co Ltd
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2020-04-21
Anticipated expiration: 2035-10-23
Also published as: CN108386817B; CN108386817A; CN105202394A

Abstract

The invention discloses a lens combination and a lighting device applying the same, wherein the lens combination is used for at least arranging a first light source and a second light source and comprises a first lens and a second lens, the first lens comprises a first light incident surface, a first light emergent surface and a first arranging space which is positioned on one side of the first light incident surface and is used for arranging the first light source; the second lens comprises a second light incident surface, a second light emitting surface and a second placing space which is positioned on one side of the second light incident surface and used for placing the second light source; the light emitted by the first light source passes through the first light incident surface and the light emergent light pattern behind the first light emergent surface is consistent with the light emergent light pattern behind the second light incident surface and the second light emergent surface. The invention solves the problem that in the prior art, it is difficult to ensure that the light emitted by different light sources can obtain the same light distribution effect after penetrating through the lens covered on the light source.

Description

Lens combination and lighting device using same

Technical Field

The invention relates to the technical field of illumination, in particular to a lens combination and an illumination device applying the same.

Background

At present, a lighting device generally includes a light source module and a lens cooperating with the light source module to focus or collimate light emitted from the light source module through the lens.

In the prior art, in order to achieve the above-mentioned purpose of focusing or collimating light, when the lighting device includes a plurality of light sources, a lens covering the light sources is disposed for each light source, so that the lighting device including the plurality of light sources needs to be provided with a plurality of lenses.

However, if one lens covering the light source is provided for each of the different light sources, it is difficult to ensure that the light emitted from the different light sources passes through the lens covering the light source to obtain the same light distribution effect, and the illumination effect of the illumination device is affected because the lenses themselves are difficult to avoid variations in process.

Disclosure of Invention

An object of an embodiment of the present invention is to provide a lens assembly and a lighting device using the same, so as to solve the problem that it is difficult to ensure that light emitted from different light sources passes through a lens covered on the light source to obtain the same light distribution effect in the prior art.

In order to achieve the above object, the lens assembly and the lighting device using the lens assembly provided by the embodiments of the present invention are implemented as follows:

a lens assembly for housing at least a first light source and a second light source, comprising:

the first lens comprises a first light incoming surface, a first light outgoing surface and a first arrangement space which is positioned on one side of the first light incoming surface and used for arranging the first light source, and the first light incoming surface and the first light outgoing surface are curved; and

the second lens comprises a second light incident surface, a second light emitting surface and a second arranging space which is positioned on one side of the second light incident surface and used for arranging the second light source, and the second light incident surface and the second light emitting surface are curved;

the incident light emitted by the first light source passes through the first light incident surface and the light emergent light pattern behind the first light emergent surface is consistent with the incident light emitted by the second light source passing through the second light incident surface and the light emergent light pattern behind the second light emergent surface.

Further, the first lens and the second lens are integrally arranged or separately arranged.

Further, the first lens is annular.

Further, the first lens is configured to make an included angle between an incident ray emitted by the first light source and a normal larger than an included angle between an emergent ray obtained after the incident ray passes through the light incident surface and the light emergent surface and the normal; the second lens is configured to make an included angle between an incident ray emitted by the second light source and a normal larger than an included angle between an emergent ray obtained after the incident ray passes through the light incident surface and the light emergent surface and the normal.

Further, the second lens is in a circular ring shape or a point shape, wherein the second lens is in a circular ring shape, and then the center of the first lens coincides with the center of the second lens; the second lens is point-shaped, and the second lens is positioned at the center of the first lens.

Further, a profile of a first cross section of the first lens taken along a first section line through a center of the first lens is not coincident with a profile of a second cross section of the second lens taken along the first section line.

Furthermore, a concave-convex structure is formed on the first light incident surface and/or the first light emergent surface, a concave-convex structure is formed on the second light incident surface and/or the second light emergent surface, and the concave-convex structure comprises one or more of a texture structure and a frosted structure.

Further, the dispersion angle corresponding to the texture structure or the frosted structure is positively correlated with the distribution angle of the first and second light sources in the first and second arrangement spaces.

Furthermore, a concave-convex particle-removing sensing layer is arranged on the first light incident surface and/or the first light emergent surface, and a concave-convex particle-removing sensing layer is arranged on the second light incident surface and/or the second light emergent surface.

An illumination device using a lens combination, comprising:

a housing;

the light source module is positioned in the shell and comprises a substrate, a first light source and a second light source, wherein the first light source and the second light source are arranged on the substrate; and

with the lens combination of light source module complex, the lens combination includes:

the light emitted by the first light source passes through the first light incident surface and the light emergent light pattern behind the first light emergent surface is consistent with the light emergent light pattern behind the second light incident surface and the second light emergent surface.

Further, the lighting device also comprises a reflecting component which is arranged in the shell and is annularly arranged.

According to the technical scheme provided by the invention, the lens combination used by the lighting device can ensure that the light emitting shape obtained after the incident light emitted by the first light source arranged in the first arrangement space passes through the first light inlet surface and the first light outlet surface is consistent with the light emitting shape obtained after the incident light emitted by the second light source arranged in the second arrangement space passes through the second light inlet surface and the second light outlet surface, so that the first lens and the second lens in the lens combination can have the same light distribution effect, the lens covering the light sources is prevented from being respectively arranged for each light source, and the lighting effect of the lighting device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of an illumination device in an embodiment of the present invention;

FIG. 2 is an exploded view of a lighting device in an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of the lighting device along the line A-A of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the lens assembly taken along the line A-A of FIG. 1;

FIG. 5 shows another perspective of the cross-sectional schematic shown in FIG. 3;

FIG. 6 is a schematic structural diagram of a lens assembly on one side of a light incident surface according to an embodiment of the present invention;

FIGS. 7a and 7b are schematic diagrams illustrating the arrangement of the first light sources on the light source module according to the embodiment of the invention;

FIG. 8 is a schematic view of a light distribution curve according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating light paths of light emitted from a light source passing through the light incident surface and the light emitting surface of a lens according to an embodiment of the invention;

FIG. 10 is a diagram of light paths of light emitted by the first and second light sources through the lens assembly according to the embodiment of the invention.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiments of the present invention provide an illumination device to solve a problem in the prior art that it is difficult to ensure that light emitted by each light source included in the illumination device is uniform in light emission type obtained after the light passes through each lens.

Referring to fig. 1 and fig. 2, the lighting device 100 of the present embodiment may include a housing 10, a light source module 40 disposed in the housing 10, and a lens assembly 30 engaged with the light source module 40.

The light source module 40 may include a substrate 41, a plurality of first light sources 42 arranged in a ring shape and disposed on a first surface 410 of the substrate 41, and one or more second light sources 43 disposed on the first surface 410 of the substrate 41. The second light source 43 is located at the center of the first light source 42. The first Light source 42 and the second Light source 43 may be Light Emitting Diodes (LEDs) or other types of Light emitters. The light source module 40 further includes an electronic device (not shown) disposed on the substrate 41. The light source module 40 may be integrated with a driving module (not shown) for driving the light source module 40, and the driving module may be integrated on the first surface 410 of the substrate 41 or a second surface opposite to the first surface.

Accordingly, the lens assembly 30 may include a base 33 for attaching to the substrate 41 of the light source module 40, a first lens 32 connected to the base 33 and having a circular ring shape, and a second lens 31 connected to the base 33 and located at the center of the first lens 32. The first lens 32 is disposed to cooperate with the first light source 42 of the light source module, and the second lens 31 is disposed to cooperate with the second light source 41 of the light source module 40.

It is worth mentioning that the above-mentioned lens combination 30 is a lens component including at least two lenses, which may be integrally provided or non-integrally provided, and the number of lenses included in the lens combination 30 is not limited thereto. In the embodiment of the present application, the second lens 31 may be circular or non-circular (e.g., dot-shaped). Preferably, if the first lens 32 and the second lens 31 are both circular, the center of the first lens 32 (i.e., the center of the circle represented by the lens) coincides with the center of the second lens 31; if the first lens 32 is annular and the second lens 31 is dot-shaped, the position of the second lens 31 may be arranged on the center of the first lens 32, and further, if the second lens 31 is dot-shaped, the center of a circular dot of the second lens 31 may be set to coincide with the center of the first lens 32. Of course, in a possible embodiment of the present application, the mutual positions of the first lens 32 and the second lens 31 are not limited.

Preferably, in order to further improve the light emitting effect and the aesthetic appearance of the lighting device 100, the lighting device 100 may further include a reflective member 20 disposed in the housing 10 and in a ring shape, wherein the reflective member 20 surrounds the outer side of the first lens 32. The reflecting member 20 includes a reflecting surface 21 having an arc shape and an opening 22 for passing the lens assembly 30 when mounted. The reflecting member 20 may be specular reflection, diffuse reflection, absorption-type reflection, or the like.

In an embodiment of the present invention, the housing 10 may include a bottom wall 12 and a side wall 11 connected to the bottom wall 12, the bottom wall 12 is provided with a plurality of fixing screw holes 13, and correspondingly, the substrate 41 of the light source module 40 is provided with a plurality of notch portions 45. The base 33 of the lens assembly 30 is provided with a plurality of fixing through holes 34. The side wall 11 of the housing 10 is further provided with a plurality of buckling parts 110 formed by protruding inwards from the side wall 11. The reflection member 20 further has a mounting wall 23 for being attached to the side wall 11 of the housing 10, and the mounting wall 23 is provided with a plurality of fastening holes 230 for being engaged with the fastening portions 110.

In the mounting process, the light source module 40 is first placed on the bottom wall 12 of the housing 10, and in the placing process, the plurality of notches 45 of the light source module 40 are respectively fitted in the plurality of fixing screw holes 13 on the bottom wall 12, and then the lens assembly 30 is placed on the first surface 410 of the substrate 41 on which the first light source 42 is disposed. Similarly, during the placement process, the plurality of fixing through holes 34 of the lens assembly 30 and the plurality of fixing screw holes 13 may be aligned, and the light source module 40 and the lens assembly 30 may be fixed in the housing 10 by bolts 70 engaged with the fixing screw holes 13. Of course, the connection method between the light source module 40 and the lens assembly 30 is not limited to this, and may be gluing, riveting, or the like. Subsequently, the reflection member 20 is placed on the periphery of the lens assembly 30, and the reflection member 20 and the housing 10 are fixed to each other through the latching portion 110 and the latching hole 230. Similarly, the coupling method of the reflection member 20 and the housing 10 is not limited to this, and may be gluing, caulking, or the like. It should be noted that the lighting device 100 further includes a conducting wire 60 installed at the bottom of the housing 10, and the conducting wire 60 is electrically connected to the light source module 40.

Reference is also made to fig. 3-5, wherein the cross-sections shown in fig. 3-5 are defined by a cross-section taken along a first cross-sectional line (i.e., the direction a-a shown in fig. 1) passing through the center of the first lens 32. The first lens 32 includes a first lens body 320 having a ring shape and a first groove 323 recessed from the base 33, and the second lens 31 includes a second lens body 310 and a second groove 313 recessed from the base 33. The first lens 32 has a first light incident surface 322 and a first light emitting surface 324 opposite to each other, and when the lens assembly 30 and the light source module 40 are mounted, due to the existence of the first groove 323, a first cavity 321 for accommodating the first light source 42 is formed between the first light incident surface 322 and the first surface 410 (shown in fig. 2). Similarly, the second lens 31 also has a second light incident surface and a second light emitting surface opposite to each other, and due to the existence of the second groove 313, when the lens assembly 30 and the light source module 40 are installed, a second cavity 311 for accommodating the second light source 43 is formed between the second light incident surface of the second lens 31 and the first surface 410. In the embodiment of the invention, the first light sources 42 of the light source module 40, which are distributed annularly, can be disposed in the first cavity 321 of the first lens 32, and compared with the prior art, a greater number of light sources can be disposed in the limited space of the illumination device 100, thereby improving the light emitting efficiency of the illumination device 100. In addition, the lens assembly 30 can adjust the number of the first light sources 42 in the first lens 32 according to the required light flux. The lens assembly 30 can share multiple packages, so that compatibility is good, and the arrangement of the light sources on the substrate 41 is more flexible.

It should be noted that, in the embodiment of the invention, the first light incident surface 322 and the first light emitting surface 324 of the first lens 32 are set to be curved surfaces, and the radius of curvature of the first light incident surface 322 is greater than the radius of curvature of the first light emitting surface 324. Thus, when the light source of the lighting device is installed in the lens assembly 30, the incident light emitted from the light source completely penetrates through the lens assembly 30 and is emitted to the outside, and the first lens 32 with the curved surface shape can improve the light emitting efficiency and the light distribution effect. In the embodiment of the invention, the substrate 41 of the light source module 40 and the base part 33 of the lens assembly 30 are attached to each other to form a first cavity or a second cavity surrounded by the substrate 41 and the base part 33, so that each of the first light source and the second light source is completely accommodated in the first cavity 321 or the second cavity 311, which can ensure that all incident light can penetrate through the lens assembly 30 and irradiate the outside of the lighting device, and the light emitting efficiency is high.

Referring to fig. 4, in order to make the light distribution effect (i.e., the light emission pattern) of each light source in the lighting device uniform after passing through the lens assembly 30, in the present embodiment, the surface shape of the first cross section of the first lens 32 along the first section line is not uniform with the surface shape of the second cross section of the second lens 31 along the first section line. In this embodiment, the height of the first lens 32 in the thickness direction of the base 33 is not equal to the height of the second lens 31 in the thickness direction of the base 33. That is, if the height of the first lens 32 in the thickness direction of the base 33 is defined as: a first vertical distance from a first top 325 of the first lens 32 to the base 33; defining the height of the second lens 31 in the thickness direction of the base 33 as: the second top 315 of the second lens 31 is at a second vertical distance from the base 33, and the first vertical distance may be greater than or less than the second vertical distance. Of course, in a preferred embodiment, the first vertical distance is set to be greater than the second vertical distance.

Preferably, an accommodating space 25 for accommodating an electronic device (not shown) of the light source module 40 is formed between the housing 10 and the reflection member 20. In the embodiment, the electronic devices are distributed in the accommodating space 25, so that the thickness of the lighting device can be effectively reduced, and the lighting device is lighter and thinner. Wherein the electronic device may comprise a driving module (not shown), such that the driving module is also arranged in the receiving space 25. Of course, the driving module and the light source module may be integrated on the substrate 41.

Fig. 6 is a schematic structural diagram of the first lens having a first light incident surface. In actual use, the lighting device may have a condition that a small number of light sources are not lighted, and the condition may cause a graininess when the lighting device is observed by human eyes through a lens. In order to remove the granular sensation and improve the visual effect, the first light incident surface 322 or the first light emitting surface 324 of the first lens 30 may be formed with a concave-convex granular sensation removing layer 35. The granular sensation removing layer 35 may be any type of concave-convex structure integrally formed on the first light incident surface 322 and/or the first light emitting surface 324 of the first lens 32, such as: and a V-shaped structure. Of course, the uneven granular material removing layer 35 may also be disposed on the first light incident surface 322 and the first light emitting surface 324. In the same principle, the granular sensation removing layer 35 may also be formed on the second light incident surface or the second light emitting surface of the second lens 31.

Fig. 7a and 7b are schematic diagrams illustrating an arrangement of the first light sources on the light source module according to the embodiment of the invention. Therein, it can be seen that the number of first light sources 42 arranged in a ring shape can be adjusted as desired. The distribution angle of the first light source 42 is defined as: the adjacent two first light sources 42 are at an angle to the line between the centers of the circles. Then, the number of the first light sources 42 in fig. 7a is 20 with a distribution angle of 18 °, and the number of the first light sources 42 in fig. 7b is 40 with a distribution angle of 9 °. In an embodiment of the invention, in order to eliminate a light spot phenomenon caused by the fact that the stretching direction of the annular first lens 32 cannot control light, an uneven structure may be formed on the first light incident surface 322 or the first light emitting surface 324 of the first lens 32, and the uneven structure may include one or more of a texture structure formed through a texture process and a frosted structure formed through a frosted process. In this embodiment, the above-mentioned etched-grain structure or frosted structure can make the dispersion angle of the emergent light obtained after the incident light generated by the first light source 42 passes through the first lens meet a certain requirement.

Fig. 8 is a schematic diagram of a light distribution curve according to an embodiment of the present invention. The definition of the dispersion angle mentioned above means: when a parallel light beam enters the

first lens

32, 1/2-intensity emergent light beams corresponding to half of the maximum emergent light intensity are determined, and the dispersion angle is the included angle formed by two 1/2-intensity emergent light beams. For example, in the light distribution curve of fig. 8, if the maximum intensity of the outgoing light is 1 (the light with the maximum intensity is concentrated on the normal position of the first lens), the 1/2-intensity outgoing light is distributed at the position ± 2.5 ° from the normal position, so that the dispersion angle is 5 °.

In order to obtain a uniform light spot, in the present embodiment, the texture structure or the frosted structure makes the dispersion angle of the first lens 32 and the distribution angle of the first light source 42 have a positive correlation. That is, when the distribution angle becomes small, the magnitude of the above-described dispersion angle needs to be correspondingly reduced, and when the distribution angle becomes large, the magnitude of the above-described dispersion angle needs to be correspondingly increased. For example: the dispersion angle may be 12 ° when the distribution angle is 18 °, and the dispersion angle may be 6 ° when the distribution angle is 9 °.

The light source includes a first light source, a first light distribution lens 32, a second light distribution lens 32, a first light source, a second light source, a third light distribution lens 32, a fourth light distribution lens 32, a fifth light distribution lens 32, a sixth light distribution lens 32, a fifth lens 32, a sixth lens 32, a fifth lens 32, a fifth lens 32, a fifth lens 32, a fifth lens, a fifth lens 32, a fifth lens, a fifth lens, a fifth lens, a fifth lens, a fifth lens.

In summary, in the lens assembly used in the illumination device of the invention, since the light emitting light pattern obtained after the incident light emitted by the first light source disposed in the first disposition space passes through the first light incident surface and the first light emitting surface is consistent with the light emitting light pattern obtained after the incident light emitted by the second light source disposed in the second disposition space passes through the second light incident surface and the second light emitting surface, the first lens and the second lens in the lens assembly can have the same light distribution effect, and a lens covering each light source is avoided, thereby improving the illumination effect of the illumination device.

The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A lens assembly for housing at least a first light source and a second light source, said lens assembly comprising:

the light-emitting light type of the incident light emitted by the first light source after passing through the first light-in surface and the first light-out surface is consistent with the light-emitting light type of the incident light emitted by the second light source after passing through the second light-in surface and the second light-out surface;

the first lens is configured to enable an included angle between an incident ray emitted by the first light source and a normal to be larger than an included angle between an emergent ray obtained after the incident ray passes through the light incident surface and the light emergent surface and the normal; the second lens is configured to enable an included angle between an incident ray emitted by the second light source and a normal to be larger than an included angle between an emergent ray obtained after the incident ray passes through the light incident surface and the light emergent surface and the normal;

the first lens is annular; the second lens is point-shaped and is positioned at the ring center of the first lens.

2. The lens assembly of claim 1, wherein the first lens and the second lens are integrally or separately disposed.

3. The lens assembly of claim 1 wherein a first cross section of said first lens taken along a first section line through the center of said first lens has a non-uniform profile with a second cross section of said second lens taken along a first section line through the center of said first lens.

4. The lens assembly of claim 1, wherein the first light incident surface and/or the first light emitting surface has a relief structure formed thereon, and the second light incident surface and/or the second light emitting surface has a relief structure formed thereon, wherein the relief structure comprises one or more of a textured structure and a frosted structure.

5. The lens assembly of claim 4, wherein the dispersing angle of the textured structure or the frosted structure is positively correlated to the distribution angle of the first and second light sources in the first and second mounting spaces; the dispersion angle is an included angle formed by two exit rays with 1/2 intensity, and the exit ray with 1/2 intensity is an exit ray corresponding to half of the maximum value of the exit light intensity after parallel rays enter the first lens.

6. The lens assembly of claim 1, wherein the first light incident surface and/or the first light emitting surface has a concave-convex granular-removal layer thereon, and the second light incident surface and/or the second light emitting surface has a concave-convex granular-removal layer thereon.

7. An illumination device using a combination of lenses, comprising:

a housing;

the lens combination as claimed in any one of claims 1-6, which is matched with the light source module.

8. The illumination device of claim 7, further comprising a reflective member disposed within the housing and arranged in a ring.