Light mixing element and light source module

Abstract

The utility model provides a kind of light mixing element and light source module, the light mixing element includes at least two light emitting parts and the connecting part being connected between adjacent two light emitting parts.Light emitting part and connecting part are collectively surrounded to form the light source cavity for accommodating light source piece;Wherein, light emitting part and connecting part are all protruded to the side away from light source cavity, and light emitting part is protruded with first distance in optical axis direction relative to light source piece, connecting part is protruded with second distance between adjacent two light emitting parts, light emitted by light source piece is deflected after being emitted via light emitting part and connecting part, and light emitted via connecting part converges on the outside of connecting part.Compared with prior art, the light mixing element of the utility model can redistribute light source energy, so that light source energy distribution is more uniform, so as to realize uniform light emitting effect of light source module, and there is no obvious light-dark difference in 360 degrees.

Description

Technical Field

[0001] This utility model relates to a light mixing element and a light source module, belonging to the field of lighting technology. Background Technology

[0002] As people's demands for lighting fixtures and living standards continue to rise, decorative lighting fixtures are widely used in daily life. Decorative lighting fixtures on the market include cylindrical fixtures. Traditional cylindrical fixtures use multiple light sources directly, which can easily create dark areas at the seams between adjacent light sources, affecting the overall lighting effect. To achieve uniform light output, multiple diffuser lenses are often used. However, when cylindrical fixtures are relatively small, using multiple diffuser lenses can reduce the light output and make assembly and fixation inconvenient.

[0003] In addition, the light source modules of decorative lighting fixtures on the market emit relatively simple colors, which cannot bring a richer visual experience.

[0004] In view of this, it is indeed necessary to improve the existing light mixing elements and light source modules to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a light mixing element that can fully utilize the energy of the light source and redistribute the energy of the light source, making the energy distribution of the light source more uniform and improving the light emission effect.

[0006] To achieve the above objectives, this utility model provides a light mixing element, comprising:

[0007] At least two light-emitting sections;

[0008] A connecting part connects two adjacent light-emitting parts, and the light-emitting parts and the connecting part together enclose a light source cavity for housing the light source component;

[0009] Both the light-emitting part and the connecting part protrude toward the side away from the light source cavity. The light-emitting part protrudes at a first distance relative to the light source in the optical axis direction, and the connecting part protrudes at a second distance between two adjacent light-emitting parts. The light emitted from the light source is deflected by the light-emitting part and the connecting part before being emitted, and the light emitted through the connecting part converges on the outside of the connecting part.

[0010] Optionally, the wall thickness of the light-emitting part and the connecting part are the same, and the first distance is greater than the second distance.

[0011] Optionally, the projections of the first light-incident surface and the first light-exit surface of the light-emitting part in the direction perpendicular to the optical axis are two equidistant parabolas, and the light source cavity includes a cavity surrounded by the first light-incident surface, with the light-emitting surface of the light source facing the opening of the cavity.

[0012] Optionally, the parabola is configured to have a minor axis and a major axis that are perpendicular to each other. The major axis is in the same direction as the optical axis of the light source. In the direction of the minor axis, the slope of the parabola is proportional to the distance from the parabola to the center of the light source. In the direction of the major axis, the slope of the parabola is inversely proportional to the distance from the parabola to the light-emitting surface.

[0013] Optionally, the projection of the second light-incident surface and the second light-exit surface of the connecting part in the direction perpendicular to the optical axis is two equidistant circular rings, and the two ends of the circular rings continue to extend to form a straight line that gradually becomes flat.

[0014] Optionally, the light mixing element is integrally molded from a transparent material doped with diffusion particles, with the light emitting part and the connecting part smoothly connected.

[0015] Another objective of this invention is to provide a light source module with the above-mentioned light mixing element, so that the light source module has a uniform light emission effect and no obvious difference in brightness or darkness over 360°.

[0016] To achieve the above objectives, this utility model provides a light source module, comprising:

[0017] The aforementioned light mixing element;

[0018] The light source component is housed within the light source cavity;

[0019] A diffuser element is arranged around the outside of the light mixing element, and a light mixing cavity is formed between the diffuser element and the light mixing element;

[0020] The light emitted from the light source enters the mixing cavity through the mixing element and is emitted from the diffusion element.

[0021] Optionally, the light source includes a mounting post and an LED light source mounted on the mounting post. The mounting post has at least two mounting surfaces located on different planes, and the LED light sources are linearly arranged on the mounting surfaces.

[0022] Optionally, the LED light source has a light-emitting surface, which is arranged correspondingly to the light-emitting part, and the connecting part surrounds the outer periphery of the mounting column.

[0023] Optionally, a diffusion layer is provided on the inner peripheral wall of the diffusion element, which is used to diffuse the light emitted by the light mixing element.

[0024] The beneficial effects of this invention are as follows: The light-mixing element of this invention utilizes a light-emitting portion and a connecting portion to jointly form a light source cavity for housing a light source component. The light-emitting portion and the connecting portion are positioned to protrude towards the side opposite to the light source cavity. The light-emitting portion protrudes at a first distance relative to the light source component along the optical axis, and the connecting portion protrudes at a second distance between two adjacent light-emitting portions. Therefore, under the action of the light-emitting portion and the connecting portion, the light emitted from the light source component can be deflected and emitted, and the light emitted through the connecting portion can converge on the outside of the connecting portion. Compared to the prior art, this invention can redistribute the light source energy, making the energy distribution more uniform, thereby achieving a uniform light emission effect of the light source module, with no significant difference in brightness across 360°. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the light source module of this utility model.

[0026] Figure 2 yes Figure 1 Another perspective of the three-dimensional structure.

[0027] Figure 3 yes Figure 1 A three-dimensional structural diagram of the light source component.

[0028] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the light mixing element.

[0029] Figure 5 yes Figure 2 A schematic diagram of the optical path of a mid-mixing element.

[0030] Figure 6 yes Figure 2 A schematic diagram of the optical path of the diffuser element.

[0031] Figure label:

[0032] 100-Light source module;

[0033] 1-Light source component; 11-Mounting post; 111-Mounting surface; 12-LED light source;

[0034] 2-Light mixing element; 21-Light emitting section; 211-First light-incident surface; 212-First light-emitting surface; 22-Connecting part; 221-Second light-incident surface; 222-Second light-emitting surface; 23-Light source cavity; 231-Cavity;

[0035] 3-Diffuser element; 31-Mixer cavity. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please see Figure 1 As shown, this utility model discloses a light source module 100, including a light source component 1, a light mixing element 2 surrounding the light source component 1, and a diffusion element 3 surrounding the outside of the light mixing element 2. This light source module 100 can utilize the functions of the light mixing element 2 and the diffusion element 3 to adjust the light emitted from the light source component 1, thereby achieving a uniform light emission effect with no significant difference in brightness across 360°.

[0038] like Figure 2 and Figure 3 As shown, the light source component 1 includes a mounting post 11 and LED light sources 12 mounted on the mounting post 11. The mounting post 11 has at least two mounting surfaces 111 located on different planes, and a plurality of LED light sources 12 are linearly arranged on the mounting surfaces 111. In this embodiment, the light source component 1 is a four-sided prism structure. That is, the mounting post 11 is a quadrangular prism with four mounting surfaces 111, and each mounting surface 111 has a plurality of LED light sources 12 arranged along the extension direction of the mounting post 11. This arrangement allows the light source module 100 to form a 360° surround cylindrical light source. Of course, in other optional embodiments, the light source component 1 can also be configured as a triangular prism, cylinder, or other cylindrical structure; there is no limitation on this.

[0039] In this embodiment, the LED light source 12 is preferably a Lambertian-type light source, following the energy distribution of a cosine radiator. That is, more than 90% of the energy of the LED light source 12 is concentrated within a beam angle of 150°, while the energy of light rays at larger angles beyond 150° is lower. This results in the fact that even though the LED light source 12 itself has a beam angle of 120° and forms a 360° ring light source, the distribution of light energy within each angle is not the same. For example... Figure 2 The LED light source 12 has relatively strong illuminance along the optical axis, but the brightness gradually decreases on both sides of the optical axis as the beam angle increases, easily creating dark areas, i.e., the energy is lower at the corner of the mounting post 11. The light mixing element 2 of this invention can fully utilize the light source energy and redistribute the light source energy, making the light source energy distribution more uniform.

[0040] like Figure 2 and Figure 4As shown, the light mixing element 2 includes at least two light-emitting portions 21 and a connecting portion 22 connecting each adjacent pair of light-emitting portions 21. The light-emitting portions 21 and the connecting portion 22 together enclose a light source cavity 23 for housing the light source element 1. By housing the light source element 1 within the light source cavity 23, a uniform light emission effect of the light source module 100 can be achieved with a smaller size. Preferably, the light mixing element 2 is disposed corresponding to the light source element 1. That is, the light mixing element 2 and the light source element 1 extend in the same direction. Figure 4 For example, in this embodiment, four light-emitting parts 21 and four connecting parts 22 are provided. One light-emitting part 21 faces a row of LED light sources 12 on the mounting post 11, so that each light-emitting surface of the LED light source 12 has a corresponding light-emitting part 21. The connecting part 22 surrounds the outer periphery of the mounting post 11, that is, it is located at the corner of the mounting post 11. The light emitted by the light source 1 is deflected by the light-emitting part 21 and the connecting part 22 before being emitted, and the light emitted by the connecting part 22 converges on the outside of the connecting part 22.

[0041] Specifically, the light-mixing element 2 is integrally molded from a transparent material doped with diffusing particles. This transparent material is preferably PC plastic. The internal diffusing particles have a diameter of approximately 3000 nm and a particle concentration of approximately 12%. The light-mixing element 2 can be manufactured using processing methods such as extrusion and injection molding.

[0042] The light-emitting portion 21 and the connecting portion 22 are smoothly connected, both protruding towards the side opposite to the light source cavity 23. In this embodiment, the light-emitting portion 21 protrudes relative to the light source 1 at a first distance along the optical axis, and the connecting portion 22 protrudes between two adjacent light-emitting portions 21 at a second distance, with the first distance being greater than the second distance, so that one end face of the light mixing element 2 is formed into a four-petal flower-shaped structure symmetrical about the center. Of course, in other optional embodiments, the first distance can be equal to the second distance to meet specific light distribution requirements. It is understood that the light mixing element 2 has a central axis perpendicular to the optical axis, and the distance from the vertex of the light-emitting portion 21 to the central axis is greater than the distance from the vertex of the connecting portion 22 to the central axis. The light mixing element 2 is formed by stretching along the central axis, and the stretching length is adjusted according to the length of the light source 1. In this embodiment, the wall thickness of the light-emitting portion 21 and the connecting portion 22 is the same, which is beneficial to reduce the manufacturing difficulty of the light mixing element 2 while ensuring its accuracy.

[0043] Preferably, the projections of the first light-incident surface 211 and the first light-emitting surface 212 of any light-emitting portion 21 in the direction perpendicular to the optical axis are two equidistant parabolic segments. This arrangement ensures that the light source cavity 23 includes a cavity 231 enclosed by the first light-incident surface 211. The emitting surface of the LED light source 12 faces the opening of the cavity 231, and the LED light source 12 is precisely accommodated at the opening of the cavity 231. In other words, the light-emitting portion 21 covers the emitting surface of the LED light source 12. The projections of the second light-incident surface 221 and the second light-emitting surface 222 of the connecting portion 22 in the direction perpendicular to the optical axis are two equidistant circular segments, the ends of which extend to form gradually flattening straight lines. These circular segments face the corner of the mounting post 11 and are preferably 1 / 4 of a circular segment.

[0044] In this embodiment, the parabola forming the light-emitting section 21 is configured with mutually perpendicular minor and major axes, meaning that the minor axis of each segment of the parabola in the light-emitting section 21 is perpendicular to its major axis. The major axis is the same as the optical axis of the corresponding LED light source 12 on the light source element 1. In the minor axis direction, the slope of the parabola is directly proportional to the distance from the parabola to the center of the light source element 1, and in the major axis direction, the slope of the parabola is inversely proportional to the distance from the parabola to the light-emitting surface. That is, in the minor axis direction, the farther the parabola is from the center of the LED light source 12, the greater its slope; in the major axis direction, the farther the parabola is from the light-emitting surface of the LED light source 12, the smaller its slope, and the height of the corresponding parabola gradually decreases.

[0045] like Figure 5 As shown, this arrangement allows more than 90% of the light emitted by the LED light source 12 to be incident on the first light-incident surface 211, deflected, and emitted from the first light-emitting surface 212 towards both sides of the corresponding light-emitting portion 21, thereby reducing the energy intensity directly above the LED light source 12. The smaller-angle, higher-energy portion of this light is deflected at a larger angle to both sides of the light-emitting portion 21, while the larger-angle, lower-energy portion is deflected at a smaller angle to both sides of the light-emitting portion 21. The remaining light emitted by the LED light source 12 is incident on the second light-incident surface 221, deflected, and emitted from the second light-emitting surface 222 towards the center of the corresponding connecting portion 22, where the connecting portion 22 provides a slight converging effect.

[0046] like Figure 2 and Figure 6 As shown, a light mixing cavity 31 is formed between the diffuser element 3 and the light mixing element 2. Preferably, in this embodiment, the diffuser element 3 can be disposed on the circumferential outer side of the light mixing element 2 in a non-contact manner, and the distance between the diffuser element 3 and the light mixing element 2 can be adjusted according to specific circumstances and is not limited thereto. Of course, in other optional embodiments, the diffuser element 3 can also be disposed on the circumferential outer side of the light mixing element 2 in contact with the light emitting part 21.

[0047] Furthermore, a diffusion layer (not shown) is provided on the inner peripheral wall of the diffusion element 3. The diffusion layer is used to diffuse the light emitted through the light mixing element 2. The light emitted from the light source 1 enters the light mixing cavity 31 through the light mixing element 2 and is emitted from the diffusion element 3. The arrangement of the diffusion element 3 makes the 360° light output formed by the light source 1 more uniform, and the brightness uniformity of the surface of the diffusion element 3 can reach more than 98%, with no obvious difference between light and dark.

[0048] Specifically, the diffusion element 3 is preferably an annular cylindrical glass tube with a transparent substrate. The diffusion layer is preferably a milky white paint sprayed on the inner surface of the glass tube. The outer surface of the glass tube is not treated, and the milky white paint plays a diffusion role.

[0049] In this embodiment, the LED light source 12 is a 5mm*5mm four-cup four-color LED, which overcomes the deficiency of relatively single color in commercially available light source modules 100 and enriches the visual experience. Furthermore, the overall diameter of the light source module 100 is not less than 36mm, allowing for flexible adjustment and transformation of the color of the small-diameter cylindrical light source module 100. In other optional embodiments, if the size of the LED light source 12 is increased, the light source module 100 can be scaled proportionally to achieve the same effect.

[0050] This invention utilizes a light mixing element 2 to perform a primary light mixing, causing the light directly above the LED light source 12 to be deflected to both sides, thus supplementing the energy at the junction of the LED light source 12. Furthermore, it utilizes a diffusion element 3 to perform a secondary light mixing, making the 360° light output from the light source 1 more uniform, ultimately forming a uniform, continuous cylindrical surface light source without significant brightness abrupt changes on the glass tube wall.

[0051] In summary, the light mixing element 2 of this utility model utilizes a light-emitting portion 21 and a connecting portion 22 of the same wall thickness to jointly form a light source cavity 23 for accommodating a light source component 1. The light-emitting portion 21 and the connecting portion 22 are configured to protrude towards the side opposite to the light source cavity 23. The light-emitting portion 21 protrudes at a first distance relative to the light source component 1 in the optical axis direction, and the connecting portion 22 protrudes at a second distance between two adjacent light-emitting portions 21. Thus, under the action of the light-emitting portion 21 and the connecting portion 22, the light emitted from the light source component 1 can be deflected and emitted. Furthermore, the light emitted through the connecting portion 22 can converge on the outside of the connecting portion 22, thereby achieving a redistribution of the light source energy, making the light source energy distribution more uniform, and achieving a uniform light emission effect of the light source module 100, with no obvious difference in brightness or darkness over 360°.

[0052] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A light mixing element, characterized in that, include: At least two light-emitting sections (21); A connecting part (22) is connected between two adjacent light-emitting parts (21), and the light-emitting parts (21) and the connecting part (22) together form a light source cavity (23) for accommodating the light source component (1); The light-emitting part (21) and the connecting part (22) both protrude toward the side away from the light source cavity (23). The light-emitting part (21) protrudes at a first distance relative to the light source (1) in the optical axis direction. The connecting part (22) protrudes at a second distance between two adjacent light-emitting parts (21). The light emitted by the light source (1) is deflected by the light-emitting part (21) and the connecting part (22) and then emitted. The light emitted by the connecting part (22) converges on the outside of the connecting part (22).

2. The light mixing element according to claim 1, characterized in that: The light-emitting part (21) and the connecting part (22) have the same wall thickness, and the first distance is greater than the second distance.

3. The light mixing element according to claim 1, characterized in that: The projections of the first light-incident surface (211) and the first light-exit surface (212) of the light-emitting part (21) in the direction perpendicular to the optical axis are two equidistant parabolas. The light source cavity (23) includes a cavity (231) surrounded by the first light-incident surface (211), and the light-emitting surface of the light source (1) faces the opening of the cavity (231).

4. The light mixing element according to claim 3, characterized in that: The parabola is configured to have a minor axis and a major axis that are perpendicular to each other. The major axis is in the same direction as the optical axis of the light source (1). In the direction of the minor axis, the slope of the parabola is proportional to the distance from the parabola to the center of the light source (1). In the direction of the major axis, the slope of the parabola is inversely proportional to the distance from the parabola to the light-emitting surface.

5. The light mixing element according to claim 1, characterized in that: The projection of the second light-incident surface (221) and the second light-exit surface (222) of the connecting part (22) in the direction perpendicular to the optical axis is two equidistant circular rings, and the two ends of the circular rings continue to extend to form a straight line that gradually becomes gentler.

6. The light mixing element according to claim 1, characterized in that: The light mixing element (2) is integrally formed from a transparent material doped with diffusion particles, and the light emitting part (21) and the connecting part (22) are smoothly connected.

7. A light source module, characterized in that, include: The light mixing element (2) as described in any one of claims 1-6 above; The light source component (1) is housed within the light source cavity (23); A diffusion element (3) is arranged around the outside of the light mixing element (2) and forms a light mixing cavity (31) between the diffusion element (2) and the light mixing element (2); The light emitted from the light source (1) enters the light mixing cavity (31) through the light mixing element (2) and is emitted from the diffusion element (3).

8. The light source module according to claim 7, characterized in that: The light source component (1) includes a mounting post (11) and an LED light source (12) mounted on the mounting post (11). The mounting post (11) has at least two mounting surfaces (111) located on different planes, and the LED light source (12) is linearly arranged on the mounting surfaces (111).

9. The light source module according to claim 8, characterized in that: The LED light source (12) has a light-emitting surface, which is correspondingly arranged with the light-emitting part (21), and the connecting part (22) surrounds the outer periphery of the mounting column (11).

10. The light source module according to claim 7, characterized in that: The diffusion element (3) has a diffusion layer on its inner peripheral wall, which is used to diffuse the light emitted by the light mixing element (2).

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