Lenses and lighting

Abstract

The present invention provides a lens and a lighting device, the lens comprising: a focusing part, a light-scattering part and a mounting part; the surrounding wall of the focusing part is a total reflection surface, the bottom of the focusing part has a first cavity that is concave upward, the inner surface of the first cavity includes a first top surface and a first side surface, the first side surface surrounds the first top surface, and the first light source is suitable for being placed below the first cavity; the light-scattering part is arranged obliquely and surrounds the focusing part, the light-scattering part has a first curved surface and a second curved surface that protrude outward, the first curved surface is arranged toward the surrounding wall of the focusing part and is a reflection surface; the mounting part is arranged around the second curved surface, the inner surface of the mounting part and the second curved surface jointly define a second cavity, and the second light source is suitable for being placed below the second cavity. Thus, the light efficiency is improved and a wide-area beam angle is realized, so that the lighting device can achieve the functions of variable focus, directional focused lighting, wide-directional basic lighting and pan-directional ambient lighting.

Description

Technical Field

[0001] The invention relates to the technical field of lighting, and in particular to a lens and a lighting device. Background Art

[0002] With the continuous improvement of living standards, people's requirements for light quality are getting higher and higher. From the perspective of protecting human eye health and improving lighting effects, lamps at different angles are required for different occasions to achieve uniform lighting effects.

[0003] At present, the conventional LED light distribution on the market is roughly cosine distribution, also known as Lambertian luminescence. The light emitted by LED without any optical treatment is difficult to meet the lighting needs, so it is necessary to perform secondary light distribution or even multiple light distribution designs on LED. However, the lamps in the related art have low light efficiency after secondary light distribution, and the same lamp needs to be designed with multiple optical lenses to meet the customer's requirements for different beam angles. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the above technology at least to a certain extent. To this end, the first object of the present invention is to provide a lens.

[0005] A second objective of the present invention is to provide a lighting device.

[0006] To achieve the above object, the present invention provides a lens in a first aspect, comprising:

[0007] A light-collecting portion, wherein the peripheral wall of the light-collecting portion is a total reflection surface, the bottom of the light-collecting portion has a first cavity that is concave upward, the inner surface of the first cavity includes 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, at least part of the light emitted by the first light source is refracted by the first top surface and then emitted from the upper surface of the light-collecting portion, and at least part of the light is refracted by the first side surface and then reaches the total reflection surface for reflection and then emitted from the upper surface of the light-collecting portion;

[0008] A light-scattering portion, which is arranged obliquely and surrounds the light-collecting portion, and has a first curved surface and a second curved surface protruding outward, wherein the first curved surface is arranged toward the peripheral wall of the light-collecting portion and is a reflecting surface;

[0009] A mounting portion, wherein the mounting portion is arranged in an annular manner on the second curved surface, wherein the inner surface of the mounting portion and the second curved surface jointly define a second cavity, wherein a second light source is suitable for being placed below the second cavity, wherein at least part of the light emitted by the second light source is refracted by the second top surface of the second cavity and then emitted from the second curved surface, wherein at least part of the light is refracted by the second top surface and then emitted from the first curved surface, and wherein at least part of the light is refracted by the second top surface and then reaches the first curved surface and then is reflected and then emitted from the second curved surface.

[0010] According to the lens of the present invention, by setting the focusing part and the diffusing part, it is possible to achieve directional focusing in the middle and diffuse light in the periphery, thereby achieving single control and combined control of light, and by the fusion or contrast of color temperature, the gradient and contrast of light can be shaped, thereby improving the light effect and achieving a wide-area beam angle.

[0011] In addition, a lens according to the above embodiment of the present invention may also have the following additional technical features:

[0012] According to an embodiment of the present invention, the outer surface of the mounting portion is provided with a sawtooth structure, and the sawtooth structure is suitable for being assembled on the light source bracket and making the connection position of the mounting portion and the light source bracket adjustable. Thus, the zoom function of the lens can be realized, and the zoom is realized by the ratio of reflected light and refracted light, rather than actively losing light energy to realize the zoom, thereby further improving the light efficiency. In addition, the operation of zooming by the sawtooth structure is convenient, the adjustment accuracy is high, and the combination with the lamp body is more flexible.

[0013] According to an embodiment of the present invention, the upper end of the first side surface is connected to the edge of the first top surface, and the first top surface is formed as a curved surface convex downward.

[0014] According to an embodiment of the present invention, the light-focusing portion is bowl-shaped, and the total reflection surface of the light-focusing portion is formed as an inclined surface extending from bottom to top in a direction away from the center of the light-focusing portion, and the inclined surface is an inclined plane or a curved surface convex outward; the upper surface of the light-focusing portion is formed as a curved surface convex upward in the middle and a curved surface convex downward at the edge, wherein the area of ​​the curved surface convex upward in the middle corresponds to the first top surface.

[0015] According to an embodiment of the present invention, a connecting portion is further included, one end of which is connected to the total reflection surface of the light-collecting portion, and the other end of which is connected to the first curved surface of the light-scattering portion.

[0016] According to an embodiment of the present invention, both the upper surface and the lower surface of the connecting portion are formed as upwardly convex curved surfaces.

[0017] According to an embodiment of the present invention, the first curved surface is formed as an inclined surface extending from bottom to top in a direction away from the light focusing portion, and the second curved surface is formed as an inclined surface extending from bottom to top in a direction close to the light focusing portion.

[0018] According to an embodiment of the present invention, the second top surface is formed as an upwardly convex inclined curved surface.

[0019] According to an embodiment of the present invention, the light-collecting portion, the light-scattering portion and the connecting portion are integrally formed.

[0020] To achieve the above object, the present invention provides, in a second aspect, an illuminating device comprising the above lens.

[0021] According to the lighting device of the embodiment of the present invention, it provides a high light efficiency, dual zoom, wide-area beam angle through the setting of the above-mentioned lens, achieving the functions of directional key lighting, wide-directional basic lighting and pan-directional ambient lighting, and makes the installation of the lighting device flexible and reduces the cost.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of a lens according to the present invention;

[0024] Figure 2 is a schematic structural diagram of a lens according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of another viewing angle of a lens according to an embodiment of the present invention;

[0026] Description of reference numerals:

[0027] Lens 1;

[0028] The light focusing portion 100 , the peripheral wall 101 , the first cavity 102 , the first top surface 1021 , the first side surface 1022 , and the upper surface 103 ;

[0029] Astigmatism portion 200, first curved surface 201, second curved surface 202;

[0030] Mounting portion 300, sawtooth structure 301;

[0031] A second cavity 400 and a second top surface 401;

[0032] Connecting portion 500. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0035] The following is combined with Figure 1-Figure 3 The implementation of a lens provided by the present invention is described in detail. Among them, the lens 1 can be used in a lighting device, such as an LED lamp. In the following description of this application, the lens 1 is used in an LED lamp as an example. Of course, those skilled in the art can understand that the lens 1 can also be used in other types of lighting devices, not limited to LED lamps. Among them, the arrows in the figure are the directions of the light.

[0036] like Figure 1 As shown, a lens 1 according to an embodiment of the first aspect of the present invention comprises a light-collecting portion 100, a light-scattering portion 200 and a mounting portion 300. The lens 1 is assembled in the lamp body through a light source bracket, which can change the direction of the light emitted by the light source, so that the lamp can achieve directional focused lighting, wide basic lighting, and pan-directional ambient lighting.

[0037] Specifically, the peripheral wall 101 of the light-collecting portion 100 is a total reflection surface, and the bottom of the light-collecting portion 100 has a first cavity 102 that is concave upwards, and the inner surface of the first cavity 102 includes a first top surface 1021 and a first side surface 1022, and the first side surface 1022 surrounds the first top surface 1021. The first light source (not shown) is suitable for being placed below the first cavity 102, and at least part of the 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 portion 100, and at least part of the light is refracted by the first side surface 1022 and then reaches the total reflection surface 101 for reflection and then emitted from the upper surface 103 of the light-collecting portion 100. Among them, the first light source is suitable for being placed below the first cavity 102. The first light source can be an RGB light source with a circular exit surface, and the RGB light source can include a light-emitting chip and a sealant provided on the light-emitting chip. Since the sealant has a diffusion effect, the optical fiber emitted by the light-emitting chip will diffuse after passing through the sealant, that is, the light transmitted from the first light source to the lens 1 is actually a diffused secondary light source. It is understandable that the specific shape and type of the first light source can be specifically set according to actual requirements to better meet the actual requirements. In addition, at least part of the 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 focusing portion 100, for example, emitted approximately vertically. Then, the outer peripheral surface 101 of the focusing portion 100 is a total reflection surface, and the light projected onto the total reflection surface can be emitted after total reflection. As a result, the total reflection surface can totally reflect part of the light emitted by the first light source and then emit it from the upper surface 103 of the focusing portion 100, so that the focusing portion 100 has a focusing effect, achieving a directional focusing effect.

[0038] The light-scattering portion 200 is arranged at an angle and surrounds the light-focusing portion 100. The light-scattering portion 200 has a first curved surface 201 and a second curved surface 202 that protrude outward. The first curved surface 201 is arranged toward the peripheral wall 101 of the light-focusing portion 100 and is a reflecting surface; that is, the light-scattering portion 200 is arranged on the periphery of the light-focusing portion 100, and its shape is similar to a ring-shaped double convex mirror.

[0039] The mounting portion 300 is arranged around the second curved surface 202. The inner surface of the mounting portion 300 and the second curved surface 202 define a second cavity 400 together. The second cavity 400 is suitable for placing a second light source. At least part of the light emitted by the second light source is refracted by the second top surface 401 of the second cavity 400 and then emitted from the second curved surface 202. At least part of the light is refracted by the second top surface 401 and then emitted from the first curved surface 201. At least part of the light is refracted by the second top surface 401 and then emitted from the second curved surface 202 after being reflected. It can be understood that the first curved surface 201 is semi-reflective. When the light reaches the first curved surface 201, part of it can be emitted from the first curved surface 201, and part of it can be reflected by the first curved surface 201 and then reach the second curved surface 202. As a result, the light-scattering portion 200 has a diverging effect, and the light emitted by the second light source can be widely diverged. Then, the mounting portion 300 is suitable for mounting the lens 1 on the light source bracket.

[0040] Therefore, through the cooperation of the focusing part 100 and the diffusing part 200, a 1, 1, 1+1 intelligent control solution can be matched to realize single control and combined control respectively. The LED light source adopts RGBW or other colors, and the gradient and contrast of light are shaped by the fusion or contrast of color temperature (color).

[0041] Therefore, according to the lens 1 of the present invention, the arrangement of the focusing portion 100 and the diffusing portion 200 can realize directional focusing in the middle and diffuse light in the periphery, thereby realizing single control and combined control of light, and the gradient and contrast of light can be shaped by the fusion or contrast of color temperature, thereby improving the light effect and realizing a wide-area beam angle, thereby meeting the customer's requirements for different beam angles.

[0042] In some examples, combined Figure 2 The outer surface of the mounting portion 300 is provided with a sawtooth structure 301, and the sawtooth structure 301 is suitable for being assembled on the light source bracket and making the connection position between the mounting portion 300 and the light source bracket adjustable. Among them, the sawtooth structure 301 and the light source bracket can drive the lens 1 to move up and down in a matching manner of a slide groove to achieve a step-by-step zoom. In this way, the zoom function of the lens 1 can be realized, and the zoom is achieved by the ratio of reflected light and refracted light, rather than actively losing light energy to achieve the zoom, which can further improve the light efficiency and realize the change of the light beam angle. In addition, the operation of zooming through the sawtooth structure 301 is convenient, the adjustment accuracy is high, and the combination with the lamp body is more flexible.

[0043] In some examples, the upper end of the first side surface 1022 is connected to the edge of the first top surface 1021, and the first top surface 1021 is formed as a curved surface convex downward. At this time, the first top surface 1021 of the first cavity 102 acts like a convex lens, and the light projected thereon is emitted parallel to 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 focusing portion 100, so that the light can be projected approximately vertically onto the upper surface 103 of the light focusing portion 100.

[0044] Optionally, the first top surface 1021 of the first cavity 102 can be formed as a smooth transition curved surface convex downward. Its specific shape and structure can be specifically set according to actual requirements, as long as it ensures that the light projected thereon can be refracted and emitted approximately vertically from the upper surface 103 of the focusing portion 100.

[0045] Optionally, the light focusing part 100 is a rotating body structure. In this case, the light focusing part 100 is a central axis symmetrical structure. Therefore, the processing is simple and the cost is low.

[0046] Optionally, the first side surface 1022 of the first cavity 102 may be formed as a straight wall extending vertically in the up-down direction. Of course, the first side surface 1022 may also be formed as an inclined surface extending obliquely from top to bottom and away from the center of the light focusing portion 100 .

[0047] In some examples, the light-collecting portion 100 is in a bowl shape, and the total reflection surface 101 of the light-collecting portion 100 is formed as an inclined surface extending from bottom to top and away from the center of the light-collecting portion 100, and the inclined surface is an inclined plane or a curved surface convex outward; the upper surface 103 of the light-collecting portion 100 is formed as a curved surface convex upward in the middle and a curved surface convex downward at the edge, wherein the area of ​​the curved surface convex upward in the middle corresponds to the first top surface 1021. That is, the total reflection surface 101 can reflect all the light projected thereon, and can effectively ensure that the light fully reflected by the total reflection surface 101 can be well emitted from the upper surface 103 of the light-collecting portion 100. Then, the middle area of ​​the upper surface 103 is similar to the effect of a convex lens, and the light projected thereon is emitted parallel to the axis of the upper surface 103. Then, the edge area of ​​the upper surface 103 is similar to the effect of a concave lens, and the light reflected from the total reflection surface 101 tends to be emitted vertically, so that the light-collecting portion 100 has a directional focusing effect.

[0048] In some examples, the first curved surface 201 is formed as an inclined surface extending from bottom to top in a direction away from the light focusing portion 100, and the second curved surface 202 is formed as an inclined surface extending from bottom to top in a direction close to the light focusing portion 100. Thus, the light diffusing portion 200 forms a ring-shaped double convex mirror structure, which can scatter the light projected onto the first curved surface 201 and the second curved surface 202, so that the light diffusing portion 200 has a wide-directional divergence effect.

[0049] In some examples, a connecting portion 500 is further included, one end of which is connected to the total reflection surface 101 of the light collecting portion 100, and the other end of which is connected to the first curved surface 201 of the light diffusing portion 200. Thus, the light diffusing portion 200 can be tilted and arranged around the light collecting portion 100 through the connecting portion 500.

[0050] The position where the connecting portion 500 connects to 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 connecting portion 500 connects to the first curved surface 201 may be at the end of the first curved surface 201.

[0051] Optionally, the upper surface and the lower surface of the connecting portion 500 are both formed as upwardly convex curved surfaces, so that the inclination angle of the light-scattering portion 200 is reasonably controlled, and a smooth transition is achieved from the light-collecting portion 100 to the light-scattering portion 200.

[0052] Optionally, the light collecting portion 100 , the light diffusing portion 200 and the connecting portion 500 are integrally formed, thereby facilitating the processing and assembly of the lens 1 .

[0053] In addition, it can be understood that the second top surface 401 of the second cavity 400 is a curved surface that smoothly transitions from the second curved surface 202 to the inner wall surface of the mounting portion 300 .

[0054] In some examples, the overall zoom effect is taken into consideration, and the edge of the light spot is optimized by setting a two-dimensional uniform light microstructure (such as a grid, a pattern, a beaded surface, etc.) on the refracted light output surface (the upper surface 103 and the first curved surface 201), so that the light output from the lens of the focusing part is soft and the central light intensity can be guaranteed.

[0055] In addition, by adjusting the distance between the light source emitting surface and the bottom of the lens 1, for example, when the distance between the light source distributed in the first cavity 102 and the lens 1 changes from 0.3 to 5 mm, the lens angle can be continuously changed from 15 to 100°. When the distance between the light source distributed in the second cavity 400 and the lens 1 changes from 1.0 to 2.5 mm, the lens 1 can be continuously changed from 180 to 260°.

[0056] According to the lighting device of the second aspect of the present invention, a high light efficiency, dual zoom, wide-area beam angle is provided through the arrangement of the above-mentioned lens 1, so as to achieve the functions of directional key lighting, wide-directional basic lighting and omnidirectional ambient lighting, and make the installation of the lighting device flexible and reduce the cost.

[0057] Other components of the lighting device according to the embodiment of the present invention may adopt existing structures, which will not be described in detail here.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A lens, characterized in that: include: A light-collecting portion, wherein the peripheral wall of the light-collecting portion is a total reflection surface, the bottom of the light-collecting portion has a first cavity that is concave upward, the inner surface of the first cavity includes 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, at least part of the light emitted by the first light source is refracted by the first top surface and then emitted from the upper surface of the light-collecting portion, and at least part of the light is refracted by the first side surface and then reaches the total reflection surface for reflection and then emitted from the upper surface of the light-collecting portion; A light-scattering portion, which is arranged obliquely and surrounds the light-collecting portion, and has a first curved surface and a second curved surface protruding outward, wherein the first curved surface is arranged toward the peripheral wall of the light-collecting portion and is a reflecting surface; A mounting portion, wherein the mounting portion is arranged in an annular manner on the second curved surface, wherein the inner surface of the mounting portion and the second curved surface jointly define a second cavity, wherein a second light source is suitable for being placed below the second cavity, wherein at least part of the light emitted by the second light source is refracted by the second top surface of the second cavity and then emitted from the second curved surface, wherein at least part of the light is refracted by the second top surface and then emitted from the first curved surface, and wherein at least part of the light is refracted by the second top surface and then reaches the first curved surface and then is reflected and then emitted from the second curved surface.

2. The lens according to claim 1, wherein: The outer surface of the mounting portion is provided with a sawtooth structure, and the sawtooth structure is suitable for being assembled on the light source bracket and enables the connection position of the mounting portion and the light source bracket to be adjustable.

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

4. The lens according to claim 1, wherein: The focusing portion is bowl-shaped, and the total reflection surface of the focusing portion is formed as an inclined surface extending from bottom to top in a direction away from the center of the focusing portion, and the inclined surface is an inclined plane or a curved surface convex outward; the upper surface of the focusing portion is formed as a curved surface convex upward in the middle and a curved surface convex downward at the edge, wherein the area of ​​the curved surface convex upward in the middle corresponds to the first top surface.

5. The lens according to claim 1, wherein: It also includes a connecting portion, one end of which is connected to the total reflection surface of the light-collecting portion, and the other end of which is connected to the first curved surface of the light-scattering portion.

6. The lens according to claim 5, characterized in that The upper surface and the lower surface of the connecting portion are both formed as curved surfaces convex upward.

7. The lens according to claim 1, wherein: The first curved surface is formed as an inclined surface extending obliquely from bottom to top in a direction away from the light focusing portion, and the second curved surface is formed as an inclined surface extending obliquely from bottom to top in a direction close to the light focusing portion.

8. The lens according to claim 1, wherein: The second top surface is formed as an inclined curved surface convex upward.

9. The lens according to claim 5, characterized in that The light-collecting portion, the light-scattering portion and the connecting portion are integrally formed.

10. A lighting device, characterized in that: Comprising the lens as described in any one of claims 1-9.

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