CN111964008B

CN111964008B - Lens, light source module, photoelectric module and ceiling lamp

Info

Publication number: CN111964008B
Application number: CN202010888194.9A
Authority: CN
Inventors: 朱俊杰; 易博; 刘金花; 王泽�
Original assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Current assignee: Ningbo Gongniu Optoelectronics Technology Co Ltd
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2022-08-16
Anticipated expiration: 2040-08-28
Also published as: CN111964008A

Abstract

The application discloses lens, light source module, photovoltaic module and ceiling lamp relates to the lighting technology field. The embodiment of the application provides a lens, can save the installation space of lens to avoid influencing the condition emergence of light efficiency owing to produce light interference. The lens of the present application includes two lens units; the lens unit comprises a mounting surface and an emergent surface which are oppositely arranged; the middle part of installation face is to the sunken cavity that forms of direction that is close to the emitting face, and the wall of cavity is the incident surface, and the profile of incident surface projection on installation face place plane is including connecting for closed loop construction and opening relative first pitch arc and second pitch arc, and the size of second pitch arc in the direction with central plane vertically is greater than the size of first pitch arc in the direction with central plane vertically, and the central plane setting that the second pitch arc is close to the lens body, and two lens unit integrated into one piece. The application discloses light source module, photovoltaic module and ceiling lamp simultaneously. The application can be used for improving the performance of the lens.

Description

Lens, light source module, photoelectric module and ceiling lamp

Technical Field

The application relates to the technical field of lighting, especially, relate to a lens, light source module, photovoltaic module and ceiling lamp.

Background

In the field of illumination, ceiling lamp is a lamps and lanterns of using extensively. Because the ceiling lamp emits light through the plurality of LED light sources arranged inside, and the beam angle of the LED light sources is 120 degrees, each LED light source can emit light to the periphery in a mode of approaching to a spherical surface under the condition of no light distribution, and the light emitted by the LED light sources can be in a multipoint radial shape taking each LED light source as the center. In general, people want the whole diffusion cover of the ceiling lamp to emit uniform light, so that the LED light source needs to be distributed with light. The purpose of the light distribution is to change the light propagation direction of the LED light sources, and the light emitted by the LED light sources is just in a basically uniform degree when reaching the diffusion cover by considering the whole diffusion cover of the ceiling lamp.

The mode that current ceiling lamp adopted every LED light source to be equipped with a lens alone carries out the grading, and when the installation space of lens was sufficient, the interval between two adjacent lenses was big enough, and two lenses can not produce light and interfere, and when the installation space of lens received the restriction, the distance between two adjacent lenses should shorten, leads to two adjacent lenses to produce light and interferes like this easily to influence the light efficiency.

Disclosure of Invention

The embodiment of this application provides a lens, light source module, photoelectricity module and ceiling lamp, can save the installation space of lens to avoid influencing the condition emergence of light efficiency because two lenses produce light interference.

To achieve the above object, in a first aspect, an embodiment of the present application provides a lens including a lens body including two lens units disposed symmetrically with respect to a center plane of the lens body; the lens unit comprises a mounting surface and an emergent surface which are oppositely arranged; the middle part of the mounting surface is recessed towards the direction close to the emergent surface to form a cavity, and the wall surface of the cavity is an incident surface; the profile of the projection of incident surface on the plane of installation face place is including connecting for closed loop configuration and opening relative first pitch arc and second pitch arc, first pitch arc with the line of two nodical points of second pitch arc is about the central plane is parallel, the second pitch arc with the size of central plane vertically orientation is greater than first pitch arc with the size of central plane vertically orientation, the second pitch arc is close to the central plane setting of lens body, and two lens unit integrated into one piece.

In a second aspect, embodiments of the present application provide an optical module, which includes a lens substrate and a plurality of lenses disposed on the lens substrate, where the lenses are the lenses described above.

In a third aspect, an embodiment of the application provides a photovoltaic module, which includes a light source board and the above optical module, a plurality of LED lamp beads are arranged on the light source board, a lens cover on the optical module is arranged on the LED lamp beads, and the lenses correspond to the LED lamp beads one to one.

Fourth aspect, the embodiment of this application provides a ceiling lamp, includes foretell photovoltaic module.

The lens provided by the embodiment of the application comprises a lens body, wherein the lens body comprises two lens units which are symmetrically arranged relative to the central plane of the lens body, and the two lens units are integrally formed. The lens unit comprises a mounting surface and an emergent surface which are oppositely arranged; the middle part of the mounting surface is recessed towards the direction close to the emergent surface to form a cavity, and the wall surface of the cavity is an incident surface; the profile of incident surface projection on installation face place plane is including connecting for closed loop construction and opening relative first pitch arc and second pitch arc, the line of two nodical lines of first pitch arc and second pitch arc is parallel about the central plane, the second pitch arc is greater than first pitch arc at the size with central plane vertically ascending side with central plane vertically side, the second pitch arc is close to the central plane setting of lens body, therefore, this application embodiment lens unit has the polarisation function, when the installation space of lens is limited, can avoid two adjacent lenses to produce light interference, and then can avoid influencing the light efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic perspective view of a lens according to an embodiment of the present disclosure;

FIG. 2 is a front cross-sectional view of a lens according to an embodiment of the present application;

FIG. 3 is a top view of a lens according to an embodiment of the present application;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a bottom view of a lens of an embodiment of the present application;

FIG. 6 is a graph of the intensity distribution of an LED light source;

FIG. 7 shows an elliptical light spot formed by an LED light source after light distribution by using a lens according to an embodiment of the present disclosure;

FIG. 8 is a diagram showing a distribution of intensity of an LED light source after being distributed with a lens according to an embodiment of the present application;

FIG. 9 is a diagram of an optical path of a lens in a small angular direction according to an embodiment of the present invention;

FIG. 10 is a diagram of an optical path of a lens in a wide angle direction according to an embodiment of the present invention;

FIG. 11 is a schematic view of an optical module according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of an optical module according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

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 to implicitly indicate 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 application, "a plurality" means two or more unless otherwise specified.

Referring to fig. 6, the beam angle of the LED light source in the ceiling lamp is only 120 °, the beam angle is small and is approximately lambertion (ideal scattering), and when a large area or an area with a special shape is directly irradiated by the LED light source, a large number of LED light sources are required, which increases the cost. Therefore, in the prior art, a lens is generally arranged outside the LED light source to distribute light to the LED light source so as to obtain a desired beam angle and a desired spot shape.

Referring to fig. 1 to 5, an embodiment of the present application provides a lens 10 including a lens body including two lens units 1 symmetrically disposed with respect to a central plane of the lens body, the lens units 1 including a mounting surface 12 and an exit surface 11 disposed oppositely; the middle part of the mounting surface 12 is sunken towards the direction close to the emergent surface 11 to form a cavity 13, and the wall surface of the cavity 13 is an incident surface 14; the projection of the incident surface 14 on the plane of the mounting surface 12 has a contour including a first arc line 133 and a second arc line 134 connected in a closed-loop configuration and having opposite openings, a line connecting two intersections of the first arc line 133 and the second arc line 134 is parallel with respect to the central plane, a dimension of the second arc line 134 in a direction perpendicular to the central plane is larger than a dimension of the first arc line 133 in a direction perpendicular to the central plane, the second arc line 134 is disposed close to the central plane of the lens body, and the two lens units 1 are integrally formed. The middle of the exit face 11 is recessed inward. From this, this application embodiment lens unit has the polarisation function, and when the installation space of lens was limited, can avoid two adjacent lenses to produce light and interfere, and then can avoid influencing the light efficiency.

In some embodiments, the exit surface 11 is a convex free-form surface and the projection of the exit surface 11 on the plane of the mounting surface 12 is an ellipse, and the two lens units 1 are arranged side by side along the minor axis direction of the ellipse.

Continuing to refer to fig. 1 to 5, the light that the LED light source sent firstly diffuses through incident surface 14, again diffuse through emitting surface 11, therefore, refer to fig. 7 and 8, this application embodiment lens can carry out the grading to the light that the LED light source sent, change its light type, realize oval facula grading, compare circular facula lens, under the prerequisite that the diameter of circular facula equals with the major axis size of oval facula, because the minor axis size of this application embodiment lens 10 is less than the diameter of circular facula lens, the area of oval facula can be less than the area of circular facula, so under the condition that the LED light source energy of configuration is the same, the luminance of oval facula is higher. Therefore, referring to fig. 11, on the premise of ensuring the spot size and the brightness of the LED light source along the long axis direction of the lens, when the lens 10 of the embodiment of the present application is applied to a circular ceiling lamp, the situation of a dark area at the center of the circular ceiling lamp can be improved; referring to fig. 12, compared with a circular spot lens, when the lens 10 according to the embodiment of the present application is applied to a square ceiling lamp, the number of optical substrates can be reduced.

Since the space for mounting the lens 10 is sometimes limited in actual use, referring to fig. 3, in some embodiments, the center-to-center distance of the two lens units 1 is smaller than the size of the minor axis of a single ellipse, i.e., the two lens units 1 have an intersection. This embodiment can reduce the volume of lens 10, and reduce cost can reduce the installation space of lens 10 simultaneously, makes the structure of ceiling lamp compacter.

In the lens 10 of the embodiment of the present application, two identical LED light sources can be configured in the two cavities 13, so that the two LED light sources can simultaneously distribute light to the same area, thereby improving the brightness of the area; in the lens 10 of the embodiment of the present application, two LED light sources with different colors may also be disposed in the two cavities 13, so that the lens 10 of the embodiment of the present application may realize mixed light and color mixing of the two LED light sources with different colors to obtain light with ideal color; in addition, an LED light source may be disposed in only one cavity 13 of the two cavities 13 in the lens 10 of the embodiment of the present application, and in this case, the same effect as that of a single lens corresponding to a single LED light source may be achieved, so that the application range of the lens 10 of the embodiment of the present application may be wider.

Referring to fig. 4, in order to facilitate installation of the LED light source, in some embodiments, the mouth of the cavity 13 is provided with a stepped groove 15, and the light source is located in the stepped groove 15.

Since the LED light source has a size of 3.5mm × 2.8mm × 0.7mm, the height of the stepped groove 15 is 0.8mm to 0.9mm in some embodiments, thereby allowing the LED light source to be incorporated without wasting material.

In some embodiments, the step grooves 15 in the two cavities 13 are arranged at intervals, and in other embodiments, the step grooves 15 in the two cavities 13 are communicated, which may be selected according to actual operating conditions.

Referring to fig. 4, when a structure in which the opening of the cavity 13 is provided with the step groove 15 is adopted, since the installation accuracy requirement of the LED light source is high, in order to avoid occurrence of a bright ring due to installation errors, in some embodiments, the surface of the step groove 15 is provided with a shining line, which is also called a shallow shining groove or a frosted shining line, and the structure can avoid occurrence of a bright ring.

In some embodiments, the incident surface 14 and the exit surface 11 are both provided with a shining pattern, and the shining patterns on the incident surface 14 and the exit surface 11 can make the emergent light more uniform, thereby improving the comfort of the emergent light.

With continued reference to fig. 4, since it is sometimes necessary to arrange two lenses side by side and in close proximity to each other, in some embodiments, the annular flange 2 is provided on the outer side of the bottom of the lens body, and when two lenses 10 of the embodiments of the present application are required to be arranged side by side, the outer sides of the annular flanges 2 of the two lenses 10 of the embodiments of the present application can be contacted and connected, so that the reliability of the installation of the lenses 10 can be improved. In some embodiments, the height of the annular flange is 1-1.5 mm, so that on the premise of ensuring the installation strength, materials can be saved to the greatest extent, the cost performance is highest, and specifically, in some embodiments, the height of the annular flange is 1 mm.

When the embodiment of forming the annular flange 2 outside the bottom of the lens body is adopted, in some embodiments, the mounting surface 12 and the surface of the annular flange 2 are both provided with the sun print, thereby shielding the light source substrate and improving the aesthetic property of the lens.

Referring to fig. 9 and 10, in some embodiments, the beam angle in the minor axis direction (small angle direction) of the ellipse is 140 ° to 170 °, and the beam angle in the major axis direction (large angle direction) of the ellipse is 170 ° to 178 °, so that the embodiment of the present application can configure the light emitted by the LED light source into a large-angle elliptical spot, which can ensure both light intensity and a large illumination area.

In some embodiments, the ratio of the size of the long axis to the size of the short axis of the ellipse is 1.2-1.9, so that the ratio of the size of the long axis to the size of the short axis of the light spot can be more appropriate, and the light spot is neither too thin nor too thick.

When the embodiment in which the beam angle in the major axis direction (large angle direction) of the ellipse is 170 ° to 178 ° is adopted, in some embodiments, the distance from the top surface of the stepped groove 15 to the highest position of the exit surface 11 is 4.3mm to 5mm, which can ensure the beam angle and save materials.

In some embodiments, the ratio of the depth of the cavity 13 to the distance between the two end points of the first arc line 133 is 0.8-1.1, which can make the volume of the lens smaller while ensuring the light effect and angle. The beam angle of an LED light source in the ceiling lamp is only 120 degrees, the beam angle is small, the height of a lampshade of the LED light source is small at the interval of the LED light source under the condition that a lens is not suitable for use, the height is usually smaller than 0.92, the LED light sources are arranged very densely, the number of the required LED light sources is large, and the cost is high.

Referring to fig. 7 and 8, after the light type of the LED light source is changed by the lens light distribution of the embodiment of the present application, the light distribution of the large-angle elliptical light spot is realized, so that the ratio of the distance between the LED light sources and the height of the lampshade is increased to 3.5, the number of the required LED light sources is significantly reduced, and thus the cost can be reduced.

Referring to fig. 11 and 12, the present embodiment also discloses an optical module, which includes a lens substrate 20 and a plurality of lenses disposed on the lens substrate 20, where the lenses are the lenses 10 in the above embodiments.

Referring to fig. 11, in some embodiments, the lens substrate 20 is an annular substrate, the plurality of lenses 10 are arranged in an annular array, and the long axis directions of the lens units 1 in the lenses 10 are arranged in a radial direction of the annular substrate.

Referring to fig. 12, in some embodiments, the lens substrate 20 is an elongated substrate, the plurality of lenses 10 are arranged in a rectangular array, and the long axes of the lens units 1 in the lenses 10 are arranged along the width direction of the elongated substrate.

The embodiment of the application also discloses a photoelectric module, including light source board and foretell optical module, be equipped with a plurality of LED lamp pearls on the light source board, on the LED lamp pearl was located to the last lens 10 cover of optical module, and lens 10 and LED lamp pearl one-to-one.

The embodiment of the application also discloses a ceiling lamp, including foretell photovoltaic module.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lens, comprising a lens body,

the lens body comprises two lens units (1) symmetrically arranged relative to a central plane of the lens body;

the lens unit (1) comprises a mounting surface (12) and an emergent surface (11) which are oppositely arranged;

the middle part of the mounting surface (12) is recessed towards the direction close to the emergent surface (11) to form a cavity (13), and the wall surface of the cavity (13) is an incident surface (14); the profile of incident surface (14) in the projection on installation face (12) place plane is including connecting as closed loop structure and opening relative first pitch arc (133) and second pitch arc (134), first pitch arc (133) with the line of two intersections of second pitch arc (134) is about the central plane is parallel, second pitch arc (134) with the size on the direction perpendicular to central plane is greater than first pitch arc (133) with the size on the direction perpendicular to central plane, second pitch arc (134) are close to the central plane setting of lens body, and two lens unit (1) integrated into one piece.

2. The lens according to claim 1, characterized in that the exit surface (11) is a convex free-form surface, and the projection of the exit surface (11) on the plane of the mounting surface (12) is an ellipse, and the two lens units (1) are arranged along the minor axis direction of the ellipse.

3. The lens according to claim 2, characterized in that the distance between the centers of two lens cells (1) is smaller than the length of the minor axis of a single ellipse.

4. Lens according to claim 1 or 2, characterized in that the middle of the exit face (11) is concave towards the entrance face (14).

5. Lens according to claim 1 or 2, characterized in that the mouth of the cavity (13) is provided with a stepped groove (15) for accommodating the light source.

6. A lens according to claim 5, characterized in that two of said stepped grooves (15) are provided at a spacing.

7. Lens according to claim 5, characterized in that two of said stepped grooves (15) communicate.

8. The lens according to claim 5, characterized in that the surfaces of the entrance surface (14), the exit surface (11) and the step groove (15) are provided with a bask.

9. The lens of claim 2, wherein the beam angle in the minor axis direction of the ellipse is 140 ° to 170 °, and the beam angle in the major axis direction of the ellipse is 170 ° to 178 °.

10. Lens according to claim 1 or 2, characterized in that the bottom outside of the lens body is provided with an annular flange (2).

11. Lens according to claim 10, characterized in that the surface of the annular flange (2) and the mounting surface (12) are provided with a bask.

12. The lens of claim 2, wherein the ratio of the dimension of the ellipse in the major axis direction to the dimension of the ellipse in the minor axis direction is 1.2-1.9, and the ratio of the depth of the cavity (13) to the distance between the two end points of the first arc line (133) is 0.8-1.1.

13. A lens according to claim 5, characterized in that the distance from the top surface of the stepped groove (15) to the highest of the exit surfaces (11) is 4.3mm to 5 mm.

14. An optical module comprising a lens substrate (20) and a plurality of lenses (10) disposed on the lens substrate (20), wherein the lenses (10) are the lenses of any one of claims 1 to 13.

15. The optical module according to claim 14, wherein the lens substrate (20) is an annular substrate, the plurality of lenses (10) are arranged in an annular array, and the long axis directions of the lens units (1) in the lenses (10) are arranged along a radial direction of the annular substrate.

16. The optical module according to claim 14, wherein the lens substrate (20) is an elongated substrate, the plurality of lenses (10) are arranged in a rectangular array, and the long axis direction of the lens units (1) in the lenses (10) is arranged along the width direction of the elongated substrate.

17. An optical module, characterized in that, includes light source board and the optical module of any one of claims 14-16, be equipped with a plurality of LED lamp pearls on the light source board, lens (10) on the optical module cover to be located on the LED lamp pearl, just lens (10) with LED lamp pearl one-to-one.

18. A ceiling lamp, characterized in that, comprises the photovoltaic module of claim 17.