CN111322584A

CN111322584A - Lens and lighting device

Info

Publication number: CN111322584A
Application number: CN202010243341.7A
Authority: CN
Inventors: 李锦昆; 康福生; 廖金华; 吴勇杰
Original assignee: Xiamen Topstar Lighting Co Ltd
Current assignee: Xiamen Topstar Lighting Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-06-23

Abstract

The invention provides a lens and a lighting device, the lens comprises: a light condensing portion, a light diffusing portion, and an installation portion; the peripheral wall of the light-gathering part is a total reflection surface, the bottom of the light-gathering part is provided with a first cavity which is concave upwards, the inner surface of the first cavity comprises a first top surface and a first side surface, the first side surface surrounds the first top surface, and a first light source is suitable for being placed below the first cavity; the light scattering part is obliquely arranged and surrounds the light focusing part, the light scattering part is provided with a first curved surface and a second curved surface which are convex outwards, and the first curved surface is arranged towards the peripheral wall of the light focusing part and is a reflecting surface; the installation department ring is located the second curved surface, and the internal surface of installation department and second curved surface inject the second cavity jointly, and the below of second cavity is suitable for placing the second light source. Therefore, the lighting effect is improved, the wide-area beam angle is realized, and the functions of zooming, directional key illumination, wide-direction basic illumination and extensive-direction environment illumination of the illuminating device are achieved.

Description

Lens and lighting device

Technical Field

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

Background

With the continuous improvement of living standard, the requirement of people on light quality is higher and higher, and the effect of uniform illumination is achieved by lamps with different angles according to the requirements of different occasions from the aspects of protecting human eye health and improving illumination effect.

At present, the conventional LED light distribution on the market is roughly in cosine distribution, also called as Lambert body light emission, and light emitted by the LED without any optical treatment hardly meets the illumination requirement, so that secondary light distribution and even multiple light distribution design of the LED are required. However, the lamps in the related art are subjected to secondary light distribution, the lighting effect is low, and multiple optical lenses need to be designed for the same lamp to meet the requirements of customers on different beam angles.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above. To this end, a first object of the invention is to propose a lens.

A second object of the present invention is to provide a lighting device.

To achieve the above object, the present invention proposes, in a first aspect, a lens comprising:

the peripheral wall of the light-gathering part is a total reflection surface, a first cavity which is recessed upwards is arranged at the bottom of the light-gathering part, the inner surface of the first cavity comprises a first top surface and a first side surface, the first side surface surrounds the first top surface, a first light source is suitable for being placed below the first cavity, at least part of light emitted by the first light source is refracted by the first top surface and then emitted from the upper surface of the light-gathering part, and at least part of light is refracted by the first side surface, reaches the total reflection surface and is reflected and then emitted from the upper surface of the light-gathering part;

the light scattering part is obliquely arranged and surrounds the light collecting part, the light scattering part is provided with a first curved surface and a second curved surface which are convex outwards, and the first curved surface is arranged towards the peripheral wall of the light collecting part and is a reflecting surface;

the installation department, the installation department encircles and locates the second curved surface, the internal surface of installation department with the second curved surface prescribes a limit to the second cavity jointly, the below of second cavity is suitable for placing the second light source, at least partial light warp that the second light source sent follow behind the second top surface refraction of second cavity the second curved surface jets out, and at least partial light warp follow behind the second top surface refraction first curved surface jets out, and at least partial light warp arrive behind the second top surface refraction first curved surface is followed after reflecting the second curved surface jets out.

According to the lens, the middle directional light condensation and the peripheral wide-direction light divergence can be realized through the arrangement of the light condensation part and the light diffusion part, the single control and the combined control of light are realized, and the gradual change and the contrast of light can be made through the fusion of color temperature or the contrast, so that the light efficiency is improved and the wide-area beam angle is realized.

In addition, the lens proposed by the above embodiment of the present invention may further have the following additional technical features:

according to the embodiment of the invention, the outer surface of the mounting part is provided with the sawtooth structure, and the sawtooth structure is suitable for being assembled on the light source bracket and enabling the connecting position of the mounting part and the light source bracket to be adjustable. Therefore, the zoom function of the lens can be realized, the zoom is realized through the proportion of the reflected light and the refracted light, the zoom is realized through the non-active loss of light energy, and the light efficiency is further improved. In addition, the operation of zooming is convenient through the sawtooth structure, the adjusting precision is high, and the combination form with the lamp body is more flexible.

According to an embodiment of the present invention, an upper end of the first side surface is connected to an edge of the first top surface, and the first top surface is formed as a curved surface protruding downward.

According to the embodiment of the invention, the light-gathering part is bowl-shaped, the total reflection surface of the light-gathering part is formed into an inclined plane which is inclined and extends from bottom to top towards the direction far away from the center of the light-gathering part, and the inclined plane is an inclined plane or an outward convex curved surface; the upper surface of the light-gathering part is formed into a curved surface with the middle protruding upwards and the edge protruding downwards, wherein the area of the curved surface with the middle protruding upwards corresponds to the first top surface.

According to the embodiment of the invention, the light-scattering part comprises a light-scattering part and a light-collecting part, wherein the light-scattering part comprises a first curved surface and a second curved surface, one end of the light-collecting part is connected with the first curved surface of the light-scattering part, and the other end of the light-collecting part is connected with the second curved surface of the.

According to an embodiment of the present invention, both upper and lower surfaces of the connection part are formed as curved surfaces protruding upward.

According to the embodiment of the invention, the first curved surface is formed into an inclined surface which is inclined and extends from bottom to top towards the direction far away from the light-gathering part, and the second curved surface is formed into an inclined surface which is inclined and extends from bottom to top towards the direction close to the light-gathering part.

According to an embodiment of the present invention, the second top surface is formed as an inclined curved surface protruding upward.

According to an embodiment of the present invention, the light condensing portion, the light scattering portion, and the connecting portion are integrally molded.

In order to achieve the above object, the present invention provides, in a second embodiment, a lighting device including the above lens.

According to the lighting device provided by the embodiment of the invention, the lens is arranged, so that the lighting device has high luminous efficiency, can double zoom and has a wide beam angle, the functions of directional accent lighting, wide-direction basic lighting and flood environment lighting are achieved, the lighting device is flexible to mount, and the cost is reduced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a cross-sectional view of a lens according to the present invention;

FIG. 2 is a schematic structural diagram of a lens according to one embodiment of the present invention;

FIG. 3 is a schematic diagram of another perspective of a lens according to an embodiment of the invention;

description of reference numerals:

a lens 1;

the light-gathering part 100, the peripheral wall 101, the first cavity 102, the first top surface 1021, the first side surface 1022 and the upper surface 103;

a light scattering part 200, a first curved surface 201, a second curved surface 202;

a mounting portion 300, a saw tooth structure 301;

a second cavity 400, a second top surface 401;

a connecting portion 500.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can 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 invention to those skilled in the art.

The implementation of a lens according to the present invention is described in detail below with reference to fig. 1-3. The lens 1 may be used in lighting devices, such as LED lamps, among others. In the following description of the present application, the lens 1 is exemplified for an LED lamp. Of course, it will be understood by those skilled in the art that the lens 1 may also be used for other types of lighting devices, and is not limited to LED lamps. Wherein the arrows in the figure are the direction of the light rays.

As shown in fig. 1, a lens 1 according to an embodiment of the first aspect of the present invention includes a light condensing portion 100, a light diffusing portion 200, and a mount portion 300. The lens 1 is assembled in the lamp body through the light source support, and can change the direction of light rays emitted by the light source, so that the lamp can achieve directional key illumination, wide-direction basic illumination and general ambient illumination.

Specifically, the peripheral wall 101 of the light-collecting part 100 is a total reflection surface, the bottom of the light-collecting part 100 has a first cavity 102 recessed upward, the inner surface of the first cavity 102 includes a first top surface 1021 and a first side surface 1022, the first side surface 1022 surrounds the first top surface 1021, a first light source (not shown) is suitable for being placed below the first cavity 102, at least a part of light emitted by the first light source is refracted by the first top surface 1021 and then emitted from the upper surface 103 of the light-collecting part 100, and at least a part of light is refracted by the first side surface 1022 and reaches the total reflection surface 101 for reflection, and then emitted from the upper surface 103 of the light-collecting part 100. Wherein the first cavity 102 is adapted to place a first light source thereunder. The first light source can be an RGB light source with a round emergent surface, the RGB light source can comprise a light-emitting chip and a sealant arranged on the light-emitting chip, and the sealant has a diffusion effect, so that optical fibers emitted by the light-emitting chip can be diffused after passing through the sealant, namely light rays transmitted to the lens 1 by the first light source are actually diffused secondary light sources. It will be appreciated that the specific shape, type, etc. of the first light source may be specifically arranged according to actual requirements to better meet the actual requirements. In addition, at least a portion of the light emitted from the first light source is refracted by the first top surface 1021 and then exits from the upper surface 103 of the light collecting portion 100, for example, exits approximately vertically. The outer peripheral surface 101 of the condensing unit 100 is a total reflection surface, and the light beam incident on the total reflection surface can be emitted after being totally reflected. Therefore, the total reflection surface can totally reflect part of the light emitted by the first light source and emit the light from the upper surface 103 of the light-condensing part 100, so that the light-condensing part 100 has a light-condensing effect, and a directional light-condensing effect is realized.

The light scattering part 200 is obliquely arranged and surrounds the light collecting part 100, the light scattering part 200 is provided with a first curved surface 201 and a second curved surface 202 which are convex outwards, and the first curved surface 201 is arranged towards the peripheral wall 101 of the light collecting part 100 and is a reflecting surface; that is, the light dispersion portion 200 is provided at the periphery of the light collection portion 100, and is shaped like a double convex mirror in a ring shape.

The mounting portion 300 is arranged around the second curved surface 202, a second cavity 400 is defined by the inner surface of the mounting portion 300 and the second curved surface 202, a second light source is suitable for being placed below the second cavity 400, at least part of light emitted by the second light source is refracted by a second top surface 401 of the second cavity 400 and then emitted from the second curved surface 202, at least part of light is refracted by a second top surface 401 and then emitted from the first curved surface 201, and at least part of light is refracted by the second top surface 401 and then reaches the first curved surface 201 to be reflected and then is emitted from the second curved surface 202. It can be understood that the first curved surface 201 is semi-reflective, and when the light reaches the first curved surface 201, a part of the light may be emitted from the first curved surface 201, and a part of the light may reach the second curved surface 202 after being reflected by the first curved surface 201. Therefore, the light-diffusing part 200 has a diffusing effect, and can diffuse the light emitted by the second light source in a wide direction. The mounting portion 300 is then adapted to mount the lens 1 on a light source holder.

Therefore, the light condensing part 100 and the light scattering part 200 can be matched with an intelligent control scheme of 1, 1 and 1+1 to respectively realize single control and combined control, the LED light source adopts RGBW or other colors, and the gradual change and contrast of light are shaped through the fusion or contrast of color temperature (color).

Therefore, according to the lens 1 of the present invention, the arrangement of the light-gathering part 100 and the light-diffusing part 200 can realize the middle directional light gathering, the peripheral wide-direction light diverging, the single control and the combined control of the light, and the gradual change and the contrast of the light can be made through the fusion of the color temperature or the contrast, so as to improve the light efficiency and realize the wide beam angle, and meet the requirements of customers for different beam angles.

In some examples, referring to fig. 2, the outer surface of the mounting portion 300 is provided with a saw-tooth structure 301, and the saw-tooth structure 301 is suitable for being assembled on the light source bracket and enabling the connection position of the mounting portion 300 and the light source bracket to be adjustable. The sawtooth structure 301 and the light source bracket may drive the lens 1 to move up and down in a sliding groove matching manner to realize step-type zooming. Therefore, the zoom function of the lens 1 can be realized, the zoom is realized through the proportion of the reflected light and the refracted light, the zoom is realized through the non-active loss of light energy, the light effect can be further improved, and the change of the light beam angle is realized. In addition, the operation of zooming through the sawtooth structure 301 is convenient, the adjustment precision is high, and the combination form with the lamp body is flexible.

In some examples, an upper end of the first side surface 1022 is connected to an edge of the first top surface 1021, and the first top surface 1021 is formed as a curved surface protruding downward. At this time, the first top surface 1021 of the first cavity 102 acts like a convex lens, and the light rays projected thereon are emitted in parallel along the axial direction of the first top surface 1021 of the first cavity 102, and then the axial direction of the first top surface 1021 of the first cavity 102 coincides with the axial direction of the light-gathering part 100, so that the light rays are projected onto the upper surface 103 of the light-gathering part 100 approximately perpendicularly.

Alternatively, the first top surface 1021 of the first cavity 102 may be formed as a smooth transition curve that is convex downward. The specific shape, structure, etc. may be set according to practical requirement, as long as it can ensure that the light projected on it can be refracted by the light-gathering unit 100 and then emitted out from the upper surface 103 of the light-gathering unit approximately vertically.

Alternatively, the light condensing portion 100 is a solid of revolution structure. In this case, the light condensing unit 100 has a central axis symmetric structure. Therefore, the processing is simple and the cost is low.

Alternatively, the first side surface 1022 of the first cavity 102 may be formed as a straight wall surface vertically extending in the up-down direction. Of course, the first side surface 1022 may be formed as a slope extending from top to bottom and obliquely in a direction away from the center of the light collecting unit 100.

In some examples, the light-condensing portion 100 is bowl-shaped, and the total reflection surface 101 of the light-condensing portion 100 is formed as an inclined surface extending from bottom to top in an inclined manner toward a direction away from the center of the light-condensing portion 100, and the inclined surface is an inclined plane or a curved surface protruding outward; the upper surface 103 of the light-condensing portion 100 is formed as a curved surface protruding upward in the middle, and a curved surface protruding downward in the edge, wherein the area of the curved surface protruding upward in the middle corresponds to the first top surface 1021. That is, the total reflection surface 101 can totally reflect the light projected thereon, and it can be effectively ensured that the light totally reflected by the total reflection surface 101 can be well emitted from the upper surface 103 of the light-condensing portion 100. Then, the middle region of the upper surface 103 functions like a convex lens, and light rays projected thereon are emitted in parallel along the axial direction of the upper surface 103. Then, the edge area of the upper surface 103 acts like a concave lens, and the light reflected by the total reflection surface 101 tends to be emitted vertically, so that the light-condensing part 100 has the effect of directional light condensing.

In some examples, the first curved surface 201 is formed as a slope extending obliquely from bottom to top toward a direction away from the light-condensing portion 100, and the second curved surface 202 is formed as a slope extending obliquely from bottom to top toward a direction close to the light-condensing portion 100. Therefore, the light scattering part 200 forms a ring-shaped biconvex mirror structure, and the light rays projected onto the first curved surface 201 and the second curved surface 202 can be emitted in a diverging manner, so that the light scattering part 200 has a wide-direction diverging effect.

In some examples, the light-condensing unit further includes a connection part 500, one end of the connection part 500 is connected to the total reflection surface 101 of the light-condensing unit 100, and the other end is connected to the first curved surface 201 of the light-diffusing unit 200. Thus, the light scattering portion 200 can be disposed around the light collecting portion 100 while being inclined by the connection portion 500.

The position where the connection portion 500 connects the total reflection surface 101 may be at 1/2 of the total reflection surface 101 and lower than the first top surface 1021 of the first cavity 102, so that the light refracted from the first side surface 1022 is totally reflected at the upper half of the total reflection surface 101. Then, the position where the connection part 500 connects the first curved surfaces 201 may be at the ends of the first curved surfaces 201.

Alternatively, both the upper and lower surfaces of the connection part 500 are formed as curved surfaces protruding upward, so that the inclination angle of the light scattering part 200 is reasonably controlled, and the light condensing part 100 smoothly transits to the light scattering part 200.

Alternatively, the light collecting part 100, the light scattering part 200, and the connecting part 500 are integrally molded. Thereby, the processing and assembly of the lens 1 is facilitated.

In addition, it is understood that the second top surface 401 of the second cavity 400 is a curved surface in which the second curved surface 202 smoothly transitions to the inner wall surface of the mounting portion 300.

In some examples, considering the overall zooming effect, the light spot edge is optimized by arranging two-dimensional light-homogenizing microstructures (such as a grid, a flower pattern, a bead surface and the like) on the refracted light emergent surface (the upper surface 103 and the first curved surface 201), so that the lens emergent light of the light focusing part is soft, and the central light intensity can be ensured.

In addition, by adjusting the distance between the light emitting surface of the light source and the bottom of the lens 1, for example, the distance between the light source distributed in the first cavity 102 and the lens 1 is changed in the process of changing the distance between 0.3 mm to 5mm, the angle of the lens can be continuously changed from 15 degrees to 100 degrees. The light source distributed in the second cavity 400 and the lens 1 can realize continuous change of the lens 1 from 180-260 degrees in the change process of the distance of 1.0-2.5 mm.

According to the lighting device of the second aspect of the present invention, the lens 1 is arranged to provide a high light efficiency, double zooming, wide beam angle, and the functions of directional accent lighting, wide base lighting, and general ambient lighting, and the lighting device is flexible to install and low in cost.

Other configurations of the lighting device according to the embodiment of the present invention may adopt existing structures, and are not described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A lens, comprising:

2. The lens of claim 1, wherein the outer surface of the mounting portion is provided with a saw-tooth structure adapted to fit on a light source holder and to make the connection position of the mounting portion and the light source holder adjustable.

3. The lens of claim 1, wherein an upper end of the first side surface is connected to an edge of the first top surface, and the first top surface is formed as a curved surface protruding downward.

4. The lens of claim 1, wherein the light-condensing portion is bowl-shaped, and the total reflection surface of the light-condensing portion is formed as an inclined surface extending from bottom to top and inclined toward a direction away from the center of the light-condensing portion, and the inclined surface is an inclined plane or an outwardly convex curved surface; the upper surface of the light-gathering part is formed into a curved surface with the middle protruding upwards and the edge protruding downwards, wherein the area of the curved surface with the middle protruding upwards corresponds to the first top surface.

5. The lens of claim 1, further comprising a connection part having one end connected to the total reflection surface of the light condensing part and the other end connected to the first curved surface of the light diffusing part.

6. The lens of claim 5, wherein the upper surface and the lower surface of the connecting portion are each formed as a curved surface that protrudes upward.

7. The lens of claim 1, wherein the first curved surface is formed as an inclined surface extending obliquely from bottom to top toward a direction away from the light-condensing portion, and the second curved surface is formed as an inclined surface extending obliquely from bottom to top toward a direction close to the light-condensing portion.

8. The lens of claim 1, wherein the second top surface is formed as an upwardly convex inclined curved surface.

9. The lens according to claim 5, wherein the light condensing portion, the light scattering portion, and the connecting portion are integrally molded.

10. A lighting device comprising a lens as claimed in any one of claims 1 to 9.