CN111964009B

CN111964009B - Lens, light source module, photoelectric module and ceiling lamp

Info

Publication number: CN111964009B
Application number: CN202010889477.5A
Authority: CN
Inventors: 易博; 朱俊杰; 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: 2023-03-24
Anticipated expiration: 2040-08-28
Also published as: CN111964009A

Abstract

The application discloses lens, light source module, photovoltaic module and ceiling lamp relates to the lighting technology field. The lens in this application can be two LED lamp pearl grading simultaneously, and compatible monochromatic or polychrome light source realizes multiple light efficiency. The lens of 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; the two lens units are integrally formed, and each lens unit comprises a mounting surface and an emergent surface which are oppositely arranged; the emergent surface is a convex free-form surface, the middle part of the mounting surface is sunken towards the direction close to the emergent surface to form a cavity, and the wall surface of the cavity is an incident surface. 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 ceiling lamp sends light through arranging many LED lamp pearls in inside, and the beam angle of LED lamp pearl is 120, consequently, under the condition of not carrying out any grading, every LED lamp pearl all can be with the mode of being close the sphere to emitting light all around, the light that sends by these LED lamp pearls is whole then can demonstrate the multiple spot radial that uses every LED lamp pearl as the center. Under the general condition, people hope that the whole diffusion cover of ceiling lamp can send even light, so just need carry out the grading to LED lamp pearl. The purpose of the light distribution is to change the light propagation direction of the LED lamp beads, and the light rays emitted by the LED lamp beads are just in a basically uniform degree when reaching the diffusion cover by considering the whole diffusion cover of the ceiling lamp.

Most of existing ceiling lamps adopt a mode that each LED lamp bead is provided with one lens independently for light distribution, and are incompatible with monochrome and dimming.

Disclosure of Invention

The embodiment of this application provides a lens, light source module, photovoltaic module and ceiling lamp, and lens can be two LED lamp pearl grading simultaneously, and compatible monochromatic or polychrome light source realizes multiple light efficiency.

To achieve the above object, in a first aspect, embodiments of the present application provide a lens including a lens body including two lens units symmetrically disposed with respect to a center plane of the lens body; the two lens units are integrally formed, and each lens unit comprises a mounting surface and an emergent surface which are oppositely arranged; the emergent surface is a convex free-form surface, the middle part of the mounting surface is sunken towards the direction close to the emergent surface to form a cavity, and the wall surface of the cavity is an incident surface.

In a second aspect, an embodiment of the present application provides 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, wherein 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; the two lens units are integrally formed. Therefore, the LED lamp can be used for light distribution of two LED lamp beads simultaneously, and is compatible with a monochromatic or multicolor light source, so that various light effects are realized.

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 isbase:Sub>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 light intensity distribution diagram of LED lamp beads;

FIG. 7 is a rectangular light spot formed by an LED lamp bead after light distribution by using the lens of the embodiment of the application;

FIG. 8 is a light intensity distribution diagram of an LED lamp bead after light distribution by using the lens of the embodiment of the application;

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

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

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

In order to increase the illumination intensity of the same area, sometimes two LED lamp beads need to be arranged and distributed with light, so that the two LED lamp beads irradiate the same area. 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 two lens units 1 being integrally molded. The lens unit 1 comprises a mounting surface 12 and an emergent surface 11 which are oppositely arranged; the emergent surface 11 is a convex free-form surface, the middle part of the mounting surface 12 is concave 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.

Therefore, the LED lamp can be used for light distribution of two LED lamp beads simultaneously, and is compatible with a monochromatic or multicolor light source, so that various light effects are realized. Specifically, two identical LED lamp beads can be configured in two lens units 1 in the lens 10 in the embodiment of the present application, and if both are cold colors or both are warm colors, the two LED lamp beads can simultaneously distribute light for the same area, so as to improve the brightness of the area; two LED lamp beads with different colors can be configured in the two cavities 13 in the lens 10 in the embodiment of the application, for example, the two LED lamp beads are cold and warm, so that the lens 10 in the embodiment of the application can realize mixed light and color mixing of the two LED lamp beads with different colors, and different lighting effects can be realized by controlling the different LED lamp beads to be turned on or off; in addition, the LED lamp beads may be configured in only one cavity 13 of the two cavities 13 in the lens 10 according to the embodiment of the present disclosure, and at this time, the same effect as that of a single lens corresponding to a single LED lamp bead may be achieved, so that the application range of the lens 10 according to the embodiment of the present disclosure is wider.

In some embodiments, the projection of the incident surface 14 onto 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 a projection of the lens unit 1 onto the plane of the mounting surface 12 has a rounded rectangle with different length and width, and a middle portion of the exit surface 11 is recessed toward the incident surface 14.

Referring to fig. 1 to 5, light emitted by the LED lamp bead is firstly diffused through an incident surface 14 and then diffused through an exit surface 11, and thus, referring to fig. 7, the lens of the embodiment of the present invention can distribute light emitted by the LED lamp bead, change the light pattern thereof, and realize rectangular light spot light distribution, compared with a circular light spot lens, on the premise that the diameter of the circular light spot is equal to the length of the rectangular light spot, since the width of the lens 10 of the embodiment of the present invention is smaller than the diameter of the circular light spot lens, and the area of the rectangular light spot can be smaller than the area of the circular light spot, under the condition that the energy of the configured LED lamp bead is the same, the brightness of the rectangular light spot is higher, and therefore, referring to fig. 11, on the premise that the light spot size and the brightness of the LED lamp bead along the length direction of the lens are ensured, when the lens 10 of the embodiment of the present invention is applied to a circular ceiling lamp, the condition that a dark area appears in 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 width of a single rounded rectangle, 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.

Referring to fig. 4, in order to conveniently mount the LED lamp bead, a step groove 15 is formed at an opening of the cavity 13, and the light source is located in the step groove 15.

Since the size of the LED lamp bead is 3.5mm × 2.8mm × 0.7mm, in some embodiments, the height of the step groove 15 is 0.8mm to 0.9mm, so that the LED lamp bead can be loaded without wasting materials.

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 the structure that the opening of the cavity 13 is provided with the step groove 15 is adopted, because the installation accuracy requirement of the LED lamp bead is high, in order to avoid the occurrence of the bright ring due to installation errors, in some embodiments, the surface of the step groove 15 is provided with a sun texture, which is also called a shallow sun texture groove or a frosted corrosion texture, and the structure can avoid the occurrence of the 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 the material can be saved to the greatest extent on the premise of ensuring the installation strength, the cost performance is highest, and particularly, in some embodiments, the height of the annular flange is 1mm.

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 basking marks, so that the light source substrate can be shielded, and the aesthetic property of the lens can be improved.

Referring to fig. 9 and 10, in some embodiments, the beam angle in the width direction (small angle direction) of the rounded rectangle is 140 ° to 170 °, and the beam angle in the length direction (large angle direction) of the rounded rectangle is 170 ° to 178 °, so that the light emitted by the LED lamp bead can be configured to be a large-angle rectangular light spot, which can ensure both light intensity and a large illumination area. The beam angle in the width direction of the rounded rectangle means a beam angle on a cross section of the lens taken through a line connecting midpoints of two short sides of the rounded rectangle; similarly, the beam angle in the longitudinal direction of the rounded rectangle refers to the beam angle on a section of the lens taken through a line connecting the midpoints of the two long sides of the rounded rectangle.

In some embodiments, the ratio of the length to the width of the rounded rectangle is 1.2 to 1.9, thereby making the ratio of the length to the width of the spot more suitable, neither too thin nor too thick.

When an embodiment in which the beam angle in the longitudinal direction (large angle direction) of the rounded rectangle 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 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 the LED lamp beads in the ceiling lamp is only 120 degrees, the beam angle is small, the height of a lampshade at the distance between the LED lamp beads is small and is usually smaller than 0.92 under the condition that a lens is not suitable for use, the LED lamp beads are arranged very densely, the number of the required LED lamp beads is large, and the cost is high.

Referring to fig. 7 and 8, after the light type of the LED lamp beads is changed through the lens light distribution, the large-angle rectangular light spot light distribution is realized, so that the distance between the LED lamp beads and the height ratio of the lampshade is increased to 3.5, the number of the needed LED lamp beads is obviously reduced, and 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 length 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 length direction of the lens units 1 in the lenses 10 is disposed 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 two lens units (1) are integrally formed;

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

the emergent surface (11) is a convex free-form surface, 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 outline of the incident plane (14) on the plane of the mounting plane (12) comprises a first arc line (133) and a second arc line (134) which are connected into a closed-loop structure and are opposite in opening, the connecting line of two intersection points of the first arc line (133) and the second arc line (134) is parallel to the central plane, the size of the second arc line (134) in the direction perpendicular to the central plane is larger than that of the first arc line (133), and the second arc line (134) is arranged close to the central plane;

the projection of the lens units (1) on the plane where the mounting surface (12) is located is a rounded rectangle, the two lens units (1) are arranged along the width direction of the rounded rectangle, and the length and the width of the rounded rectangle are different.

2. The lens according to claim 1, characterized in that the distance between the centers of two lens units (1) is smaller than the width of a single rounded rectangle.

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

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

5. Lens according to claim 4, characterized in that two of said stepped grooves (15) are provided at a distance.

6. Lens according to claim 4, characterized in that two of said stepped grooves (15) communicate.

7. The lens according to claim 4, characterized in that the surfaces of the entrance surface (14), the exit surface (11) and the step groove (15) are provided with a bask.

8. The lens of claim 1, wherein the beam angle along the width direction of the rounded rectangle is 140 ° to 170 °, and the beam angle along the length direction of the rounded rectangle is 170 ° to 178 °.

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

10. Lens according to claim 9, characterized in that the surface of the annular flange (2) and the mounting surface (12) are provided with a bask.

11. The lens according to claim 1, characterized in that the ratio of the length to the width of the rounded rectangle is comprised between 1.2 and 1.9 and/or the ratio of the depth of the cavity (13) to the distance between the two end points of the first arc (133) is comprised between 0.8 and 1.1.

12. The lens according to claim 4, characterized in that the distance from the top surface of the stepped groove (15) to the highest point of the exit surface (11) is 4.3mm to 5mm.

13. An optical module comprising a lens substrate (20) and a plurality of lenses (10) disposed on the lens substrate (20), the lenses (10) being as claimed in any one of claims 1 to 12.

14. The optical module according to claim 13, wherein the lens substrate (20) is an annular substrate, the plurality of lenses (10) are arranged in an annular array, and the length direction of the lens units (1) in the lenses (10) is arranged along the radial direction of the annular substrate.

15. The optical module according to claim 13, wherein the lens substrate (20) is an elongated substrate, the plurality of lenses (10) are arranged in a rectangular array, and the length direction of the lens units (1) in the lenses (10) is arranged along the width direction of the elongated substrate.

16. An optoelectronic module, comprising a light source board and the optical module of any one of claims 13 to 15, wherein the light source board is provided with a plurality of LED beads, a lens (10) on the optical module is covered on the LED beads, and the lens (10) corresponds to the LED beads one by one.

17. A ceiling lamp, characterized in that comprises the optoelectronic module of claim 16.