Light distribution structure and lighting equipment

Abstract

The utility model discloses a light distribution structure which comprises a light control piece and a lens assembly. The light control part comprises a light mixing part and a light reflecting part, the light reflecting part is arranged on the light mixing part, and the light mixing part and the light reflecting part are provided with a light mixing cavity and a light reflecting cavity respectively; the lens assembly comprises a first lens and a second lens, the first lens is arranged in the light mixing cavity, and a light mixing distance is formed between the first lens and the light emitting surface of the light source assembly; the second lens is arranged on the light reflecting part; light emitted by the light source assembly is emitted to the outside after passing through the light mixing cavity, the first lens, the light reflecting cavity and the second lens. According to the light distribution structure, the light rays emitted by the light source assembly are processed through the light control part and the lens assembly, the light control part is provided with the light mixing cavity and the light reflecting cavity, the first lens of the lens assembly conducts secondary distribution on the light rays, the second lens collects the light rays to control the angle, and therefore effective light distribution is conducted; and small-angle emission is carried out under the condition that the cost is saved. The utility model further provides lighting equipment comprising the light distribution structure.

Description

Technical Field

[0001] The utility model relates to the technical field of small-angle lighting, and in particular to a light distribution structure and lighting equipment. Background Art

[0002] In order to meet the lighting needs of small and medium angles, the spotlights on the market mainly use COB light sources as their light source components, and a smaller number use SMD light sources. The reason is that although the price of SMD light sources is cheap, the following technical problems limit the application of SMD light sources in spotlights for small-angle lighting. Specifically: (1) SMD light sources, the most commonly used are 2835 light sources. If lenses are used for small-angle light distribution, yellow spots will appear at the edge of the emission range, as well as corresponding color mixing problems. (2) The power of a single SMD light source is low. If high-power lighting is required, multiple SMD light sources are generally used. However, since one SMD light source corresponds to one lens, the combination of multiple lenses will result in a larger overall lens size, which in turn increases the size of the lamp, which does not meet the requirements of thin and light lamps. (3) If multiple SMD light sources are combined into a light source module that imitates a COB light source, because it is a combination of multiple SMD light sources, there is usually a certain gap between the light sources, and it is difficult to combine the light sources into a complete circle; in order to obtain a circular light spot and eliminate the defects caused by the large spacing between the light sources, the lens is generally enlarged, but it is difficult to achieve a smaller light output angle. (4) If the color temperature of the lamp needs to be adjusted, two SMD light sources with different color temperatures are required. If the conventional solution is used to mix the two light sources with different color temperatures, the light output angle will generally be expanded to about 40 degrees.

[0003] The prior art discloses a matching structure of a lampshade and a reflective cup, comprising a reflective cup and a lampshade, wherein a honeycomb bead structure is provided in the middle of the upper surface of the lampshade, a Fresnel lens structure is formed in the middle of the lower surface of the lampshade, the reflective cup is detachably fixed on the lampshade, the upper opening of the reflective cup is larger than the lower opening, and the honeycomb bead structure is arranged in the middle of the reflective cup. The matching structure uses the honeycomb bead structure provided on the lampshade to mix the light, thereby reducing glare. However, the matching structure of the lampshade and the reflective cup does not involve small-angle light control processing of the SMD light source. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a light distribution structure, which processes the light emitted by the light source assembly through a light control member and a lens assembly, wherein the light control member is provided with a light mixing cavity and a light reflecting cavity, the first lens of the lens assembly performs secondary distribution on the light, and the second lens gathers the light to control the angle, thereby performing effective light distribution and performing small-angle emission while saving costs. The utility model also provides a lighting device including the light distribution structure.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A light distribution structure, used for adjusting the light emitted by the light source assembly, the light distribution structure comprises a light control member and a lens assembly, the light control member and the lens assembly are arranged on the light source assembly; the light control member comprises a light mixing portion and a light reflecting portion, the light reflecting portion is arranged on the light mixing portion, and the light mixing portion and the light reflecting portion are respectively provided with a light mixing cavity and a light reflecting cavity;

[0007] The lens assembly includes a first lens and a second lens, the first lens is arranged in the light mixing cavity, and there is a light mixing distance between the first lens and the light emitting surface of the light source assembly; the second lens is arranged on the reflective portion;

[0008] The light emitted by the light source assembly is emitted to the outside after passing through the light mixing cavity, the first lens, the reflective cavity and the second lens.

[0009] In one preferred embodiment, the light mixing portion has a columnar structure, comprising a first side wall and a first end and a second end arranged at both ends of the first side wall, and the first side wall is internally provided with a reflective film, or coated with reflective paint, or electroplated with an aluminum layer.

[0010] In one of the preferred embodiments, the reflecting portion and the light mixing portion are an integrally formed structure, the reflecting portion includes a second side wall and a light inlet and a light outlet arranged at both ends of the second side wall, the light inlet is connected to the second end, and the light inlet is smaller than the light outlet, and the second side wall is internally provided with a reflective film, or coated with reflective paint, or electroplated with an aluminum layer.

[0011] In one preferred embodiment, the second side wall is a planar structure or a curved structure.

[0012] In one preferred embodiment, the first lens is a concave lens, the first lens is embedded and installed in the second end, and the first lens does not protrude from the second end.

[0013] In one preferred embodiment, the second lens is a Fresnel lens, and the second lens includes a first light emitting surface and a second light emitting surface, the first light emitting surface has a planar structure, and the first light emitting surface is arranged on the light outlet; the second light emitting surface is provided with a plurality of light emitting ring bodies; in a cross-sectional view, the second light emitting surface has a serrated structure.

[0014] The utility model also provides a lighting device, which includes a light source assembly and the above-mentioned light distribution structure, wherein the light source assembly includes a substrate and a light source component, the light source components together form a light-emitting surface, and the light source component is arranged in the light mixing cavity.

[0015] In one preferred embodiment, the light source is an SMD light source or a COB light source; when the light source is an SMD light source, the light source is arranged on the substrate in a cluster shape, and the light source includes a first light-emitting element and a second light-emitting element;

[0016] In the case of monochromatic temperature light distribution, the second light emitting elements are arranged on the substrate around the first light emitting element located in the center;

[0017] In the case of dual color temperature light distribution, the second light emitting element and the first light emitting element are arranged on the substrate at an interval.

[0018] In one preferred embodiment, the substrate is a circular substrate with a first diameter, and the substrate is embedded and installed at the bottom of the light mixing cavity.

[0019] In one preferred embodiment, the first end has a second diameter, which is greater than or equal to the first diameter; the height of the light mixing cavity is 3 times or more of the second diameter, and the light mixing distance is less than the height of the light mixing cavity.

[0020] Based on the above technical solution, the technical effects achieved by the utility model are:

[0021] 1. The light distribution structure provided by the utility model adjusts the light emitted by the light source assembly through the light control member and the lens assembly. The light mixing part and the light reflecting part of the light control member are respectively provided with a light mixing cavity and a light reflecting cavity. The first lens of the lens assembly performs secondary distribution on the light, and the second lens gathers the light to control the angle, thereby performing effective light distribution and performing small-angle emission while saving costs.

[0022] 2. In the lighting device provided by the present invention, the light emitted by the light source is processed by the light mixing cavity, the first lens, the reflective cavity and the second lens and then emitted to the outside, thereby meeting the lighting requirements at small angles.

[0023] 3. The lighting device provided by the utility model can use multiple SMD light sources arranged in a cluster on a substrate as light sources, which can meet the light output requirements of a light distribution angle as low as 24° without increasing the size of the lamp body; it can also perform light mixing on SMD light sources with dual color temperatures, which is more cost-effective than conventional light distribution solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an exploded view of the light distribution structure of Example 1.

[0025] Figure 2 Schematic diagram of the structure of the light control element of Example 1.

[0026] Figure 3 This is an exploded view of the lighting device of Example 3.

[0027] Figure 4 This is a schematic diagram of the structure of the lighting device of Example 3.

[0028] Figure 5 for Figure 4 Sectional view of the AA section line.

[0029] Figure 6 This is a schematic diagram of the structure of the light source assembly of Example 3. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] Example 1

[0035] Combined with reference Figure 1 and Figure 2A light distribution structure 100 is used to adjust the light generated by the light source assembly 1, so as to generate light emitted at a small angle, and can be applied to lighting equipment such as spotlights, downlights, and ceiling lights. The light distribution structure 100 includes a light control member 2 and a lens assembly 3, which are mounted on the light source assembly 1, so as to control the light emitted by the light source assembly 1. The light source assembly 1 includes a substrate 11 and a light source member 12, which together form a light-emitting surface 120 when emitting light.

[0036] The light control element 2 includes a light mixing portion 21 and a light reflecting portion 22. The light mixing portion 21 has a columnar or cylindrical structure, and the light reflecting portion 22 has a bowl-shaped structure. The light reflecting portion 22 is located above the light mixing portion 21. Figure 2 As shown, the light mixing portion 21 and the light reflecting portion 22 are both hollow structures, so correspondingly, the light mixing portion 21 and the light reflecting portion 22 are respectively provided with a light mixing cavity 210 and a light reflecting cavity 220 .

[0037] In this embodiment, the reflective portion 22 and the light mixing portion 21 are integrally formed. In some embodiments, the reflective portion 22 and the light mixing portion 21 may also be separate structures, and the reflective portion 22 and the light mixing portion 21 are fixedly connected together by bonding, ultrasonic welding or other methods to form the light control member 2.

[0038] Further, the light mixing portion 21 includes a first side wall 211, a first end 212, and a second end 213, wherein the first end 212 and the second end 213 are respectively located at the lower end and the upper end of the first side wall 211, and the second end 213 and the first end 212 are both annular structures. A reflective structure can be added inside the first side wall 211, that is, on the inner side wall of the light mixing cavity 210 to improve the light mixing (reflection) efficiency. In some embodiments, a reflective film / reflective paper can be attached to the inside of the first side wall 211, and the reflective efficiency of the reflective film / reflective paper is generally greater than 97%. In some embodiments, a reflective paint can also be coated (sprayed) on the inside of the first side wall 211, and the reflective efficiency of the reflective paint is generally greater than 95%. In some embodiments, an aluminum layer is electroplated inside the first side wall 211 to improve the reflection and mixing efficiency.

[0039] The reflective portion 22 includes a second side wall 221, a light inlet 222 and a light outlet 223, wherein the light inlet 222 is interconnected with the second end 213 of the light mixing portion 21, and the light inlet 222 is smaller than the light outlet 223. In this embodiment, since the reflective portion 22 has a bowl-shaped or horn-shaped structure, the light inlet 222 and the light outlet 223 are both annular structures, and the diameter of the light inlet 222 is smaller than the diameter of the light outlet 223. Similar to the first side wall 211, a reflective structure may be added to the inside of the second side wall 221, that is, on the inner side wall of the reflective cavity 220 to improve the reflective efficiency. For example, a reflective film / reflective paper may be attached to the inside of the second side wall 221, or a reflective paint may be coated (sprayed), or an aluminum layer may be electroplated inside the second side wall 221 to improve the reflective efficiency. In some embodiments, the second side wall 221 may be a planar structure or a curved structure, which is used to collect and reflect light, thereby improving the light output efficiency.

[0040] In the lens assembly 3, the first lens 31 is a concave lens, the first lens 31 is embedded and installed in the second end 213, and the top surface of the first lens 31 does not protrude from the second end 213. The bottom surface of the first lens 31 is a plane. The second lens 32 is a Fresnel lens, and the main function of the second lens 32 is to converge the light and control the angle. The second lens 32 includes a first light-emitting surface 321 and a second light-emitting surface 322, wherein the first light-emitting surface 321 has a planar structure, and the first light-emitting surface 321 is arranged on the light outlet 223. A plurality of light-emitting ring bodies 323 are arranged on the second light-emitting surface 322. The heights of the plurality of light-emitting ring bodies 323 decrease from the outside to the inside, and the diameters also decrease. In a cross-sectional view or a profile view, the second light-emitting surface 322 has a sawtooth structure. It should be noted that the second side of the light control member 2 collects and reflects the light, so that the stray light emitted by the first lens 31 and the light reflected from the second lens 32 are reflected again through the second side wall 221 .

[0041] The light distribution structure provided in this embodiment adjusts the light emitted by the light source assembly through the light control part and the lens assembly. The light mixing cavity of the light mixing part and the light reflecting cavity of the light reflecting part can mix and reflect light. The first lens of the lens assembly performs secondary distribution on the light, and the second lens gathers the light to control the angle, thereby performing effective light distribution and emitting at a small angle while saving costs.

[0042] Example 2

[0043] This embodiment provides a light distribution structure 100, which mainly replaces or optimizes the components of the lens assembly 3. Among them, the first lens 31 embedded and installed at the second end 213 can be replaced by a frosted plate with a sun-textured structure on the surface, or replaced by a diffuser plate with a diffuser added. The second lens 32 installed at the light outlet 223 can also replace the Fresnel lens with a convex lens.

[0044] The other component structures of the light distribution structure are similar to those in Embodiment 1 and will not be described in detail here.

[0045] Example 3

[0046] Combined with reference Figure 3-Figure 6 This embodiment provides a lighting device, which may be a spotlight, a downlight, a ceiling light or a ceiling light, and includes a light source assembly 1 and a light distribution structure 100 of Embodiment 1 or Embodiment 2. The light source assembly 1 includes a substrate 11 and a light source component 12, and the light source component 12 may be an SMD light source or a COB light source.

[0047] When the light source 12 is an SMD light source, it is fixed on the substrate 11 in a ball shape, and the light source 12 together forms a light emitting surface 12, and the light source 12 is located in the light mixing cavity 210. When the light source 12 is a COB light source, the light source 12 is a single COB light source.

[0048] This embodiment is described by taking the light source component 12 as an SMD light source as an example. SMD is the English abbreviation of "Surface Mounted Devices", which means surface mount devices. In the SMD light source, a positive chip that needs to be wire bonded is used, and it is soldered to the substrate under the support of the bracket to form a package. The substrate 11 is a PCB circuit board, which can be a glass fiber substrate or an aluminum substrate, and can be cut into a corresponding shape as required. The substrate 11 of this embodiment is a circular substrate, and the substrate 1 has a first diameter d1. In the light control component 2, the second end 213 and the first end 212 of the light mixing part 21 are both annular structures, and the first end 212 has a second diameter d2. Since the light source component 1 is embedded and installed in the first end 212, the second diameter d2 of the first end 212 is greater than or equal to the first diameter d1 of the substrate 11, that is, d2≥d1. A sealing ring, such as a silicone sealing ring or a rubber sealing ring, may be provided between the first end 212 and the substrate 11.

[0049] The height n of the light mixing cavity 210 is greater than the second diameter d2 of the first end 212, that is, n>d2. In some embodiments, the height n of the light mixing cavity 210 is three times or more than the second diameter d2. The greater the height n of the light mixing cavity 210, the better the light mixing effect, but the light extraction efficiency will be reduced. The height n of the light mixing cavity 210, the second diameter d2, the light mixing distance m, and the overall size of the light mixing portion 21 can be designed and adjusted according to the light mixing efficiency and light extraction efficiency requirements.

[0050] Furthermore, the light source components 12 are closely distributed on the substrate 11 in a cluster shape, and the light source components 12 do not need to be arranged in a ring shape. The light source components 12 include a first light-emitting element 121 and a second light-emitting element 122. All the light source components 12 together form a light-emitting surface 120. There is a light mixing distance m between the first lens 31 and the light-emitting surface 120. The height n of the light mixing cavity 210 is greater than the light mixing distance m, that is, n>m.

[0051] The light source 12 can perform single-color temperature distribution and dual-color temperature distribution. In some embodiments, when single-color temperature distribution is required, the first light-emitting element 121 is fixed to the center of the substrate 11, and the second light-emitting element 122 is distributed on the substrate 11 around the first light-emitting element 122, thereby forming a clustered or clustered light source structure. The inner side of the second light-emitting element 122 can be surrounded to form a regular polygonal structure. For example, when six second light-emitting elements 122 are arranged around the middle first light-emitting element 121, the inner sides of the six second light-emitting elements 122 roughly form a regular hexagonal structure.

[0052] In other embodiments, when dual color temperature light distribution is required, the first light emitting element 121 and the second light emitting element 122 are arranged at intervals on the substrate 11. The first light emitting element 121 and the second light emitting element 122 are staggered and fixed on the substrate 11 at intervals, and are controlled by different circuits respectively, and the first light emitting element 121 and the second light emitting element 122 can be lit separately or simultaneously as required.

[0053] Regardless of whether it is single-color temperature distribution or dual-color temperature distribution, the light emitted by the first light-emitting element 121 and the second light-emitting element 122 all enter the light mixing cavity 210 for mixing, thereby obtaining a good light mixing effect; and then pass through the first lens 31, the reflective cavity 220 and the second lens 32 to be emitted to the outside.

[0054] In the lighting device provided in this embodiment, multiple SMD light sources arranged in a cluster on the substrate are used as light source components. The light emitted by the light source components is processed by the light mixing cavity, the first lens, the reflective cavity and the second lens and then emitted to the outside, which can meet the lighting requirements of a small angle of 24°. The light extraction efficiency can reach more than 80%, and there is no need to increase the size of the lamp body. This embodiment uses a low-cost SMD light source as a light source component, and can mix the light of the SMD light source with a dual color temperature, which is more cost-effective than conventional light distribution solutions.

[0055] The above contents are merely examples and illustrations of the structure of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these obvious replacement forms all belong to the protection scope of the utility model.

Claims

1. A light distribution structure, used to adjust the light emitted by the light source assembly, characterized in that: The light distribution structure includes a light control member and a lens assembly, wherein the light control member and the lens assembly are arranged on the light source assembly; the light control member includes a light mixing portion and a light reflecting portion, wherein the light reflecting portion is arranged on the light mixing portion, and the light mixing portion and the light reflecting portion are respectively provided with a light mixing cavity and a light reflecting cavity; The lens assembly includes a first lens and a second lens, the first lens is arranged in the light mixing cavity, and there is a light mixing distance between the first lens and the light emitting surface of the light source assembly; the second lens is arranged on the reflective portion; The light emitted by the light source assembly is emitted to the outside after passing through the light mixing cavity, the first lens, the reflective cavity and the second lens.

2. The light distribution structure according to claim 1, characterized in that: The light mixing part has a columnar structure, and includes a first side wall and a first end and a second end arranged at both ends of the first side wall. The first side wall is internally provided with a reflective film, or coated with reflective paint, or electroplated with an aluminum layer.

3. The light distribution structure according to claim 2, characterized in that: The reflecting part and the light mixing part are an integrally formed structure, and the reflecting part includes a second side wall and a light inlet and a light outlet arranged at both ends of the second side wall, the light inlet is connected to the second end, and the light inlet is smaller than the light outlet, and the second side wall is internally provided with a reflective film, or coated with reflective paint, or electroplated with an aluminum layer.

4. The light distribution structure according to claim 3, characterized in that: The second side wall is a planar structure or a curved structure.

5. The light distribution structure according to claim 3, characterized in that: The first lens is a concave lens, and the first lens is embedded and installed in the second end portion, and the first lens does not protrude from the second end portion.

6. The light distribution structure according to claim 5, characterized in that: The second lens is a Fresnel lens, and the second lens includes a first light emitting surface and a second light emitting surface, the first light emitting surface has a planar structure, and the first light emitting surface is arranged on the light outlet; the second light emitting surface is provided with a plurality of light emitting ring bodies; in a cross-sectional view, the second light emitting surface has a serrated structure.

7. A lighting device, characterized in that It comprises a light source assembly and the light distribution structure according to any one of claims 1 to 6, wherein the light source assembly comprises a substrate and a light source component, the light source components together form a light-emitting surface, and the light source component is arranged in the light mixing cavity.

8. The lighting device according to claim 7, characterized in that The light source is an SMD light source or a COB light source; when the light source is an SMD light source, the light source is arranged on the substrate in a cluster shape, and the light source includes a first light-emitting element and a second light-emitting element; In the case of monochromatic temperature light distribution, the second light emitting elements are arranged on the substrate around the first light emitting element located in the center; In the case of dual color temperature light distribution, the second light emitting element and the first light emitting element are arranged on the substrate at an interval.

9. The lighting device according to claim 8, characterized in that The substrate is a circular substrate with a first diameter, and the substrate is embedded and installed at the bottom of the light mixing cavity.

10. The lighting device according to claim 9, characterized in that The first end has a second diameter, the second diameter being greater than or equal to the first diameter; The height of the light mixing cavity is 3 times or more of the second diameter, and the light mixing distance is smaller than the height of the light mixing cavity.

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