CN216079652U - Lens for lamp and lamp - Google Patents

Abstract

The utility model relates to the technical field of illumination, and particularly discloses a lens for a lamp and the lamp, wherein the lens comprises: a lens body; the light incident surface is arranged on one side of the lens body and is formed into a free-form surface; the light emergent surface is arranged on the other side of the lens body and is opposite to the light incident surface; at least one of the light incident surface and the light emergent surface is provided with a microstructure. According to the utility model, the microstructures are arranged on at least one of the light incident surface and the light emergent surface of the lens, so that on one hand, the microstructures can play a role in light mixing and light uniformizing, so that light spots irradiated on a working surface are uniform and soft, and on the other hand, the microstructures can enhance the light interception capability of the lens, so that the anti-glare effect is better.

Description

Lens for lamp and lamp

Technical Field

The utility model relates to the technical field of illumination, and particularly discloses a lens for a lamp and the lamp.

Background

The LED table lamp is widely used in learning and working, the service life is long, and the light environment comfort level provided by the table lamp greatly influences the eyesight of people and the learning and working efficiency. The table lamp in the current market has various effects, and mainly has the following defects: 1. the desk lamp has direct glare, light enters human eyes from a light-emitting surface directly when a user uses the desk lamp to study and work, when the light intensity of the part is high, the user needs to improve the mental concentration force to achieve better study and work efficiency, and the mental concentration makes people easy to fatigue. 2. The illuminance distribution of the working surface is uneven, when a user works in a learning mode, the fluctuation of the illuminance of different areas in the working range in a small range is still adaptable and even beneficial to reducing visual fatigue, but the too large fluctuation can cause the visual fatigue caused by the too large eye adjustment range when the user watches the contents of the different areas, and the long-time working cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a lens for a lamp and the lamp, which can effectively intercept light to avoid direct glare and reasonably adjust light energy distribution to make the illuminance of a working surface more uniform.

To achieve the above object, the present invention provides a lens for a lamp, including:

a lens body;

the light incident surface is arranged on one side of the lens body and is formed into a free-form surface;

the light emergent surface is arranged on the other side of the lens body and is opposite to the light incident surface;

at least one of the light incident surface and the light emergent surface is provided with a microstructure.

The utility model also provides a lamp, which comprises a circuit board, a lens assembly and a plurality of light sources arranged on the circuit board, wherein the lens assembly comprises a plurality of lenses for the lamp, and the lenses are arranged opposite to the light sources.

In addition, the lens for a lamp of the present invention may have the following additional technical features.

According to an embodiment of the present invention, the light emitting surface is formed as a plane or a curved surface, and the light incident surface includes a central region and a peripheral region surrounding the central region, wherein the central region is formed as a recessed portion recessed toward the light emitting surface.

According to an embodiment of the present invention, the microstructure includes a concentric ring structure disposed in a middle region of the light incident surface, the concentric ring structure includes a plurality of concentric rings disposed at intervals from inside to outside, and the concentric rings divide the recessed portion into a plurality of sub-recessed portions.

According to an embodiment of the present invention, the microstructure further includes a plurality of fillets arranged in a peripheral region of the light incident surface, and the plurality of fillets surround the concentric ring structure and are radially distributed.

According to one embodiment of the utility model, the projection diameter of the outermost concentric ring on the light-emitting surface is not more than 1mm,

the radial distance between the projections of the two adjacent concentric rings on the light-emitting surface is not more than 1 mm.

According to one embodiment of the utility model, two adjacent sub-recesses are in arc transition connection, and the radius of the arc transition connection is 0.2 mm.

According to an embodiment of the present invention, the microstructure includes a plurality of pyramids disposed on the light exit surface, and the pyramids are uniformly distributed on the light exit surface, or the microstructure is scaly, prismatic, beaded, frosted, or microcrystalline.

According to one embodiment of the utility model, the pyramid is a hexagonal pyramid.

According to one embodiment of the utility model, the lens body is filled with diffusing particles.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the microstructures are arranged on at least one of the light incident surface and the light emergent surface of the lens, so that on one hand, the microstructures can play a role in light mixing and light uniformizing, so that light spots irradiated on a working surface are uniform and soft, and on the other hand, the microstructures can enhance the light interception capability of the lens, so that the anti-glare effect is better.

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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of a partial structure of a lamp according to an embodiment of the utility model;

FIG. 2 is a schematic view of a lens configuration of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of a lens configuration according to an embodiment of the present invention, FIG. 2;

FIG. 4 is a cross-sectional view of a lens in an embodiment of the utility model;

FIG. 5 is a cross-sectional view of FIG. 4 at A-A, with arrows pointing in the direction of light propagation;

FIG. 6 is a cross-sectional view of FIG. 4 at A-A, with arrows pointing in the direction of light propagation;

FIG. 7 is an enlarged view of a portion of FIG. 4;

FIG. 8 is a schematic view of a lens structure according to another embodiment of the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a cross-sectional view of FIG. 9 at B-B;

FIG. 11 is a polar light distribution plot of a lamp according to an embodiment of the present invention;

FIG. 12 is a prior art Lambertian distribution plot;

FIG. 13 is a graph illustrating an illuminance distribution of a lamp according to an embodiment of the present invention.

The reference numbers illustrate:

the light source module comprises a lamp 100, a circuit board 10, a lens assembly 11, a lens 110, a light incident surface 1101a, a light emergent surface 1101b, a middle area 1101c, a sub-recessed portion 1101d, a peripheral area 1101d, a plurality of light sources 12, concentric rings 13, fillets 14, a pyramid 15 and an optical surface 150.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

A luminaire 100 in some embodiments of the utility model is described below with reference to fig. 1-8. The lamp 100 may be a wall washer, a blackboard, a desk lamp, or the like. In the following description of the present application, the lamp 100 is taken as an example of a desk lamp. Of course, those skilled in the art will appreciate that the luminaire 100 may also be used with other types of luminaires without limitation.

As shown in fig. 1 to 10, an embodiment of the present invention provides a lamp 100, where the lamp 100 is a direct-type desk lamp, the lamp 100 includes a circuit board 10, a lens assembly 11, and a plurality of light sources 12, where the plurality of light sources 12 are disposed on the circuit board 10, the plurality of light sources 12 are arranged in an array, the lens assembly 11 includes a plurality of lenses 110, the plurality of lenses 110 are arranged in an array, and the plurality of lenses 110 may be spliced to form the lens assembly 11, or may be an integrated structure. Each light source 12 corresponds to one lens 110, the lenses 110 are arranged opposite to the light sources 12, and the number of the lenses 110 is the same as that of the light sources 12.

In this embodiment, with continued reference to fig. 1, the lens assembly 11 may be in a long strip shape, and the lens assembly 11 may extend along a straight line, and the length of the lens assembly 11 may be specifically set according to the application. Correspondingly, the circuit board 10 may also be a long strip shape adapted to the shape of the lens assembly 11. Further, the light source 12 may be selected as an LED lamp bead, but is not limited thereto, when the light source 12 is an LED lamp bead, the LED lamp bead may be multiple, and the multiple LED lamp beads may be sequentially arranged along the length direction of the lens assembly 11.

It should be noted that, in the present embodiment, with reference to fig. 2, the lens 110 may be in a block shape, and the lens 110 includes: a lens body 1101; the lens body 1101 includes a light incident surface 1101a and a light emitting surface 1101b, wherein the light incident surface 1101a is disposed on one side of the lens body 1101 and is formed as a free-form surface, the light emitting surface 1101b is disposed on the other side of the lens body 1101 and is opposite to the light incident surface 1101a, and the light emitting surface 1101b is formed as a plane, wherein at least one of the light incident surface 1101a and the light emitting surface 1101b is provided with a microstructure (described in detail below). Specifically, on one hand, the micro structure can play a role in light mixing and light homogenizing, so that light spots irradiated on a working surface are uniform and soft, and on the other hand, the micro structure can enhance the light interception capability of the lens, so that the anti-glare effect is better.

In addition, the light emitting surface 1101b may also be formed as a standard curved surface, which is not limited in this embodiment.

The light incident surface 1101a of the lens 110 is a primary light distribution surface, and the light emitting surface 1101b is a secondary light distribution surface and is also a light emitting surface. Specifically, the lens 110 adopts a "reverse light distribution" technology, utilizes the light incident surface 1101a as a main light distribution surface, and combines simple refraction of the light emitting surface 1101b to achieve the required light energy distribution.

It should be noted that the lens 110 has a different light distribution from the conventional lens: the conventional lens is composed of a light incident surface and a light exiting surface, wherein the light incident surface has a small change to the propagation of light rays, and the light exiting surface plays a main role in adjusting, and the light energy is redistributed through the adjustment of the light exiting surface, but the lens 110 in the embodiment of the present application is also divided into the light incident surface 1101a and the light exiting surface 1101b, wherein the light incident surface 1101a is a free curved surface playing a main role in adjusting light rays, and the light exiting surface 1101b is a standard curved surface with a large plane or radius, and plays a role in intercepting light by using the total reflection principle.

As shown in fig. 5-6, the following describes the propagation path of the light emitted from the light source 12: after reaching the light incident surface 1101a of the lens 110, the light emitted by the light source 12 is refracted by the light incident surface 1101a into the lens, and the thickness of the inside of the lens is preferably 1-2mm, so that normal injection molding of the light incident surface 1101a can be ensured, and the lens 110 can be prevented from being too thick and reduced and the cost is prevented from increasing. The light rays continue to propagate inside the lens 110, and are refracted and totally reflected by the light emitting surface 1101b after reaching the light emitting surface 1101b, wherein the light rays with the incident angle within the total reflection critical angle refract out of the lens to irradiate the working surface, the light rays with the incident angle greater than the total reflection critical angle are reflected back to the lens 110, and the part of the light rays is reflected to the light emitting surface 1101b to continue to exit from the light incident surface 1101a, or is refracted to the circuit board 10 from the light incident surface 1101a and then is reflected to the lens 110 by the circuit board 10 to continue to propagate. By adjusting the light incident surface 1101a, the total reflection light energy can be made smaller, and the light transmittance of the lens 110 can be ensured.

In this embodiment, with continued reference to fig. 5-6, the light incident surface 1101a is a free-form surface, and here, it is to be noted that "free-form surface" refers to a surface that has the arbitrary characteristics of conventional machining and molding and cannot be expressed by one or more polynomials, for example, a free-form surface cannot be expressed by one polynomial, or a free-form surface cannot be expressed by two polynomials, or a free-form surface cannot be expressed by three polynomials, and so on, and has good design flexibility. Specifically, a person skilled in the art can calculate a curved surface by combining energy conservation, a refraction law and a light distribution target, and from the aspect of mathematical calculation, the effect and efficiency of curved surface design are ensured.

Further, the distance between the light emitting surface of the light source 12 and the light incident surface 1101a of the lens 110 is 1-5 mm, and of course, a person skilled in the art can adjust the distance according to design, the smaller the distance, the smaller the lens 110 can be designed, the thinner the whole lens assembly 11 can be made, and the larger the distance, the more favorable the light mixing of the microstructures on the lens 110.

In some embodiments of the present application, the lens 110 may be made of a material with a refractive index higher than that of air, such as transparent plastic or glass, and in order to achieve a better light mixing effect, scattering media such as diffusing particles may be further added to the transparent material, so as to change the single linear propagation of light inside the lens 110, and one light is reflected by the diffusing particles to form a plurality of light rays propagating in different directions.

With continued reference to fig. 5, the light incident surface 1101a includes a central region 1101c and a peripheral region 1101d surrounding the central region, wherein the light emitting surface of the light source 12 faces the center of the central region 1101c of the light incident surface 1101a, and the central region 1101c is a concave portion that is concave toward the light emitting surface 1101 b. Specifically, the middle of the light incident surface 1101a is concave upward, and the peripheral region of the light incident surface 1101a tends to be flat relative to the concave middle of the light incident surface 1101 a.

Further, in some embodiments of the present application, with continued reference to fig. 3-7, microstructures are formed on the input surface 1101a, and in particular, the microstructures include a central region 1101c of the input surface 1101a having a concentric ring structure including a plurality of concentric rings 13 spaced apart from each other from the inside to the outside, the concentric rings 13 dividing the recess of the central region 1101c into a plurality of sub-recesses 1101 d. Specifically, the plurality of sub-recessed portions 1101d are connected end to end, and for convenience of processing, two adjacent sub-recessed portions 1101d may be rounded with a small radius, that is, two adjacent sub-recessed portions 1101d are designed to be in circular arc transition connection, and further, the radius of the circular arc transition connection is 0.2 mm.

It should be noted that, with reference to fig. 3, a plurality of fillets 14 are arranged in the peripheral region of the light incident surface 1101a, and the plurality of fillets 14 surround the concentric ring structure and are radially distributed. Specifically, the projection diameter of the outermost concentric ring 13 on the light emergent surface 1101b is not more than 1mm, and the diameter of the concave part is not more than 5 mm. The radial distance between the two adjacent concentric rings 13 projected on the light emergent surface 1101b is not more than 1mm, and the diameter of the sub-concave portion 1101d is not more than 10 mm.

It should be noted that in other embodiments of the present application, as shown in fig. 8 to 10, the microstructure is formed on the light emitting surface 1101b, the microstructure may be a plurality of pyramid-shaped pyramids 15 arranged on the light emitting surface 1101b, and the plurality of pyramids 15 are uniformly distributed on the light emitting surface 1101 b. Specifically, the pyramid 15 has a plurality of symmetrically arranged optical surfaces 150, which not only can improve the light extraction efficiency, but also can prevent the occurrence of bright spots.

Further, with reference to fig. 8, the pyramid 15 is a hexagonal pyramid, the hexagonal pyramid includes six optical surfaces 150, the six optical surfaces 150 are different, and the same light incident direction is different because the orientations of the optical surfaces 150 are different, so that the light emitting direction of each optical surface 150 is different, and bright spots are prevented from being formed. It should be noted that the pyramid can also be arranged according to actual needs, for example, in other preferred embodiments of the present invention, the pyramid can also be arranged as a rectangular pyramid or a pentagonal pyramid, etc.

The pyramid 15 also includes a base surface (not shown) having six sides, and the six optical surfaces 150 are connected to the six sides of the base surface, respectively. The six sides include six oppositely disposed straight sides such that each optical surface 150 is a plane of symmetry. It should be noted that in other preferred implementations of the present invention, the six sides may all be straight sides, or the six sides may all be curved sides.

In the present embodiment, the plurality of pyramids 15 are arranged on the light exit surface 1101b in a linear shape, it should be noted that the arrangement of the pyramids 15 is not limited thereto, for example, in other preferred embodiments of the present invention, the plurality of pyramids 15 may also be arranged in an arc shape.

It should be noted that the microstructures are structures with specific shapes disposed on the light incident surface 1101a and the light emitting surface 1101b, and can function as micro lenses, the sizes of the microstructures include but are not limited to sizes seen by naked eyes, and the light path of the lens 110 can be changed by an array of the microstructures on the light incident surface 1101a or the light emitting surface 1101 b.

In addition, the microstructure is not limited to the above two application embodiments, and in other embodiments of the present application, the microstructure may be a scaly, striped, beaded, frosted, or microcrystalline structure formed on the light emitting surface 1101 b. This embodiment is not described herein in detail.

Referring to fig. 11 to 13, after light distribution is performed by the lens 110, the central light intensity of the lamp 100 is decreased, the light intensity of 30 to 60 degrees is increased, and the light intensity of more than 60 degrees is decreased, that is, after light energy is redistributed by the lens 110, the central illumination of an illumination area is decreased, the edge illumination of the illumination area is increased, and large-angle light is reduced, so that the desktop illumination is uniform and higher, glare is lower, and meanwhile, light energy is more reasonably distributed to a required area, so that the light utilization rate is improved.

It is worth mentioning that other configurations and operations of the luminaire 100 in the embodiments of the present application are known to those skilled in the art, and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A lens for a luminaire, comprising:

a lens body;

the light incident surface is arranged on one side of the lens body and is formed into a free-form surface;

the light emergent surface is arranged on the other side of the lens body and is opposite to the light incident surface;

at least one of the light incident surface and the light emergent surface is provided with a microstructure.

2. The lens of claim 1, wherein the light exiting surface is formed as a plane or a curved surface, and the light entering surface comprises a central region and a peripheral region surrounding the central region, wherein the central region is formed as a concave portion that is concave toward the light exiting surface.

3. The lens for a lamp of claim 2, wherein the micro-structure comprises a concentric ring structure disposed in a middle region of the light incident surface, the concentric ring structure comprises a plurality of concentric rings spaced from each other from inside to outside, and the concentric rings divide the recessed portion into a plurality of sub-recessed portions.

4. The lens of claim 3, wherein the microstructures further comprise a plurality of ridges disposed around the perimeter of the light incident surface, the ridges surrounding the concentric ring structure and radially disposed.

5. The lens for a luminaire of claim 3 wherein the outermost concentric circles are no more than 1mm in diameter; the minimum distance between two adjacent concentric rings is not more than 1 mm.

6. The lens for a lamp as claimed in claim 5, wherein two adjacent sub-recesses are connected by a circular transition, and the radius of the circular transition is 0.2 mm.

7. The lens of claim 1, wherein the microstructure comprises a plurality of pyramids disposed on the light exit surface, and the pyramids are uniformly distributed on the light exit surface; or the microstructure is scaly, striped, beaded, frosted or microcrystalline.

8. The lens for a light fixture of claim 7, wherein said pyramid is a hexagonal pyramid.

9. Lens for a luminaire as claimed in any one of the claims 1 to 8, characterized in that the lens body is filled with diffusing particles.

10. A luminaire comprising a circuit board, a lens assembly and a plurality of light sources disposed on said circuit board, said lens assembly comprising a plurality of lenses for a luminaire as claimed in any one of claims 1 to 9, said plurality of lenses being arranged in an array, and said lenses being disposed opposite said light sources.

Images