Light distribution assembly and luminaire

Abstract

The application provides a light distribution assembly and a lamp. The light distribution assembly comprises: a lens having opposite light-incoming and light-outgoing sides, the lens being provided with a light-outgoing surface on the light-outgoing side, a light-incoming cavity being formed in the lens and opening towards the light-incoming side, a cavity wall of the light-incoming cavity being a light-incoming surface, and a side of an outer side wall of the lens facing the light-incoming cavity being a reflecting surface; and a light-blocking structure arranged in the light-incoming cavity and used for blocking light rays incident on the light-blocking structure, the lens being configured to reflect the light rays incident on the light-incoming cavity and then emit the light rays from the light-outgoing surface. The light distribution assembly and the lamp can effectively improve a light spot and reduce glare.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and more particularly to a light distribution component and a luminaire. Background Technology

[0002] In the field of lighting technology, the design of luminaires not only focuses on the luminous efficiency of the light source, but also pays increasing attention to the distribution, uniformity and illumination range of the light, and the requirements for the light distribution effect of the light source are getting higher and higher.

[0003] Traditional light distribution methods often employ a single lens structure. These structures have numerous limitations when achieving complex light distribution effects, such as significant light efficiency loss, poor light distribution uniformity, and insufficient glare control. Furthermore, most existing light distribution components suffer from inconvenient installation and complex manufacturing processes, and using multi-component combined light distribution components would also increase manufacturing costs. Summary of the Invention

[0004] The purpose of this invention is to provide a light distribution component and lamp that can improve light spot and reduce glare.

[0005] To achieve the above objectives, the present invention provides a light distribution assembly, comprising:

[0006] A lens has an incident light side and an exit light side. The lens has an exit light surface on the exit light side. An incident light cavity is formed inside the lens and opens towards the incident light side. The cavity wall of the incident light cavity is the incident light surface, and the side of the outer wall of the lens facing the incident light cavity is the reflecting surface.

[0007] A light-shielding structure is located inside the light-entry cavity and is used to block light rays incident on the light-shielding structure.

[0008] The lens is configured to reflect the light incident into the light cavity and then emit it from the light exiting surface.

[0009] Optionally, the lens has a through cavity, which includes an incident light cavity and a mounting cavity communicating with it. The mounting cavity is located near the light exiting side, and the light-shielding structure is fixed to the mounting cavity.

[0010] Optionally, the light-shielding structure includes a first light-shielding member having a light-shielding surface facing the light source module.

[0011] Optionally, the light-shielding surface has a multi-faceted pyramidal structure with multiple recesses.

[0012] Optionally, the light-shielding structure may also include a second light-shielding component, which is connected to the first light-shielding component, and the first light-shielding component is fixed to the lens via the second light-shielding component.

[0013] Optionally, the second light-shielding member is provided with a light-shielding column extending through the first light-shielding member toward the light source module, the light-shielding column being used to block the light reflected from the light cavity.

[0014] Optionally, the light-shielding structure is made of a light-absorbing material.

[0015] Optionally, the light-shielding structure can be an integrated structure.

[0016] Optionally, a light shield may also be included, located above the lens and fixedly connected to the lens.

[0017] A lighting fixture includes a light source module and the aforementioned light distribution components.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0019] The light distribution assembly of this invention includes a lens and a light-shielding structure. The lens has an incident light side and an exit light side, and the lens has an exit light surface on the exit light side. An incident light cavity is formed inside the lens, opening towards the incident light side, and the light-shielding structure is disposed inside the incident light cavity. The cavity wall of the incident light cavity is the incident light surface, and the outer wall of the lens facing the incident light cavity is a reflecting surface. Thus, the light emitted by the light source module can partially enter the reflecting surface through the incident light surface, and after reflection by the reflecting surface, it is emitted through the exit light surface. Some light undergoes Fresnel reflection at the incident light surface, generating stray light. The light-shielding structure can absorb this stray light, improve the light spot and reduce glare, making the light output of the lamp more uniform. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a lamp that conforms to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the lens;

[0022] Figure 3 This is a cross-sectional view of the light distribution assembly;

[0023] Figure 4 This is a three-dimensional structural diagram of the light-blocking structure;

[0024] Figure 5 This is the optical path diagram of the light distribution component;

[0025] Figure 6 This is an exploded view of the light distribution component.

[0026] Explanation of reference numerals in the attached figures:

[0027] Lighting fixtures 100;

[0028] Light distribution assembly 1, lens 11, light-incident side 111, light-outceasing side 112, light-incident cavity 113, mounting cavity 114, light-incident surface 115, reflective surface 116, light-outceasing surface 117, docking part 118;

[0029] The light-shielding structure 12 includes a first light-shielding member 121, a light-shielding surface 1211, an annular abutment part 1212, a second light-shielding member 122, a light-shielding column 1221, a connecting end 1222, a free end 1223, a connecting part 1224, a light-shielding cover 125, and a snap-fit ​​part 1251.

[0030] Light source module 2. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0033] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Please see Figure 1 As shown, a lamp 100 is provided in an embodiment of the present invention. The lamp 100 includes a light distribution component 1 and a light source module 2. The light distribution component 1 is used to distribute light to the light source module 2, so that the lamp 100 can make full use of light and achieve a uniform light output effect.

[0035] The light distribution assembly 1 includes a lens 11 and a light-shielding structure 12.

[0036] Please see Figure 2 As shown, the lens 11 includes an incident light side 111 and an exit light side 112. The incident light side 111 faces the light source module 2, and the exit light side 112 is disposed opposite to the incident light side 111. The lens 11 has an exit light surface 117 on the exit light side 112. The lens 11 has a through cavity, which includes an incident light cavity 113 and a mounting cavity 114 communicating with the incident light cavity 113. The incident light cavity 113 faces the opening of the incident light side 111, and the mounting cavity 114 is disposed near the exit light side 112 and opens on the exit light surface 117.

[0037] Please see Figure 2 and Figure 3 As shown, the light-shielding structure 12 is disposed within the light-entry cavity 113 and fixed to the mounting cavity 114, and is used to block the light incident on the light-shielding structure 12. The light-shielding structure 12 separates the connected light-entry cavity 113 and the mounting cavity 114.

[0038] The entrance cavity 113 is funnel-shaped, and the mounting cavity 114 is cylindrical. In the axial direction of the lens 11, the mounting cavity 114 has a first length, and the entrance cavity 113 has a second length; the ratio of the first length to the second length is 1.8 to 2.2. By rationally setting the length ratio of the entrance cavity 113 and the mounting cavity 114, light can be fully utilized and light loss during transmission can be reduced.

[0039] The light-entry cavity 113 includes a first end facing the light-entry side 111 and a second end connected to the mounting cavity 114. The cross-sectional area of ​​the first end is larger than that of the second end. In other words, the larger opening of the horn-shaped cavity faces the light source module 2. This is beneficial for capturing and receiving light emitted by the light source module 2 over a wider range. Compared with other cylindrical or conical shapes, the horn-shaped design can collect light more effectively, reduce light loss at the entrance, and improve overall light efficiency. As the light propagates from the first end to the second end, the gradual decrease in cross-sectional area disperses the light during propagation. This dispersion helps the light to be distributed more evenly in subsequent optical processing, reducing light spots and uneven brightness.

[0040] Please see Figure 3 As shown, lens 11 includes an incident light surface 115, a reflecting surface 116, and an exiting light surface 117. The incident light surface 115 is the cavity wall of the incident light cavity 113, used to receive light emitted from the light source module 2. The reflecting surface 116 is the outer side of the lens 11 facing the incident light cavity 113, responsible for reflecting light to the exiting light surface 117. That is, lens 11 reflects the light incident on the incident light cavity 113 and then exits from the exiting light surface 117.

[0041] In summary, the light emitted by the light source module 2 enters the reflecting surface 116 through the light-incident surface 115, and after being reflected by the reflecting surface 116, it is emitted through the light-out surface 117. Preferably, the reflecting surface 116 is a total reflection surface 116, which can collimate all the light rays incident on the reflecting surface 116 and make full use of the light.

[0042] Please see Figure 4 As shown, the light-shielding structure 12 includes a first light-shielding member 121 and a second light-shielding member 122 connected together. The outer periphery of the first light-shielding member 121 abuts against the boundary region between the inner wall of the light-entry cavity 113 and the inner wall of the mounting cavity 114, thereby separating the light-entry cavity 113 and the mounting cavity 114. The first light-shielding member 121 is fixed to the lens 11 by the second light-shielding member 122.

[0043] The first light-shielding member 121 has a light-shielding surface 1211 facing the light source module 2. The second light-shielding member 122 has a light-shielding column 1221 extending through the first light-shielding member 121 towards the light source module 2. The light-shielding column 1221 is used to block the light reflected from the light cavity 113. That is, the light-shielding column 1221 is used to absorb 95% of the light in the middle part of the light source module 2, and the light-shielding surface 1211 is used to reflect and reabsorb the remaining 5% of unabsorbed light.

[0044] The surface of the light-shielding surface 1211 has multiple recessed pyramidal structures. Part of the light emitted by the light source module 2 will shine directly onto the first light-shielding member 121. At this time, the first light-shielding member 121 effectively prevents the light from directly penetrating inside the lens 11, thereby avoiding unnecessary light leakage and light spot formation. This helps to improve the overall control of the light, ensure that the light propagates along the predetermined path, and improve the lighting effect.

[0045] The pyramidal structure effectively increases the contact area between light and the light-shielding surface 1211, and reflects the light multiple times through its multiple facets. The size, shape, and number of pyramidal structures can be adjusted as needed to adapt to different light source characteristics and lighting requirements.

[0046] Preferably, the light-shielding surface 1211 is made of black surface. The reflectivity of black surface is 5%. After only two reflections, the light energy is only 0.25% of the original, which is almost negligible, thus achieving the effect of absorbing light.

[0047] The first light-shielding member 121 also includes an annular abutment portion 1212. The light-shielding surface 1211 is located inside the annular abutment portion 1212, and the annular abutment portion 1212 extends beyond the light-shielding surface 1211 in the direction toward the light-entry cavity 113. When light is reflected on the pyramidal structure, the weak reflected light may shine onto the light-entry surface 115. The annular abutment portion 1212, which extends beyond the light-shielding surface 1211, can effectively block this part of the light.

[0048] The light-blocking column 1221 blocks part of the direct light by extending towards the light-incident side 111, making the light more evenly distributed inside the lens 11.

[0049] The light-shielding column 1221 not only blocks direct light but also further guides and disperses the light through its shape and position. When the light emitted from the light source module 2 hits the lens 11, some of the light is reflected back, causing Fresnel reflection and generating stray light. This stray light is projected onto the light-shielding column 1221 and absorbed, reducing the chaotic scattering of light inside the luminaire 100 and making the light more uniform and softer when it reaches the light-emitting surface 117. In addition, the length and shape of the light-shielding column 1221 can be adjusted as needed to adapt to different lighting requirements and achieve the best light distribution effect.

[0050] The presence of the first light-shielding element 121 and the second light-shielding element 122 effectively reduces the risk of glare, making the light in the illuminated area softer and more comfortable. This is especially important for people who need to be in a lit environment for a long time, such as office workers and students reading. By reducing the occurrence of glare and light spots, the first light-shielding element 121 and the second light-shielding element 122 improve the user's visual comfort and help protect eye health.

[0051] The second light-shielding member 122 includes a connecting end 1222 and a free end 1223 disposed opposite to each other. The connecting end 1222 is connected to the first light-shielding member 121, and the free end 1223 is disposed close to the light-incident side 111. From the connecting end 1222 to the free end 1223, the cross-sectional area of ​​the second light-shielding member 122 gradually decreases, which saves material costs to a certain extent.

[0052] In this embodiment, the light-shielding column 1221 is also made of a light-absorbing material with a black surface. The reflectivity of the black surface is 5%. After only two reflections, the light energy is only 0.25% of the original, which is almost negligible, thus achieving the effect of absorbing light.

[0053] Furthermore, along the axial direction of lens 11, the entrance cavity 113 has a second length, and the light-shielding column 1221 has a third length, with the ratio of the second length to the third length being 2 to 4. By controlling the length of the light-shielding column 1221 within the entrance cavity 113, the propagation path of light can be guided and controlled more effectively. Within this ratio range, the light-shielding column 1221 can moderately block direct light while allowing sufficient light to pass through and enter the entrance cavity 113 for further scattering and distribution. This balance helps to achieve a more uniform and softer light distribution, reduce light spots and uneven brightness, and improve lighting efficiency.

[0054] Please see Figure 5 As shown, part of the light emitted by the light source module 2 is directly incident on the first light-shielding member 121 and the second light-shielding member 122 and is absorbed; part of the light enters the reflecting surface 116 through the light-incident surface 115 and is reflected by the reflecting surface 116 and then emitted through the light-exiting surface 117; and a portion of the light undergoes Fresnel reflection on the light-incident surface 115 and is reflected back to the first light-shielding member 121 and the second light-shielding member 122 and absorbed.

[0055] The second light-shielding member 122 also includes a connecting portion 1224. The connecting portion 1224 is located within the mounting cavity 114. In this embodiment, the connecting portion 1224 is also made with a black light-absorbing surface, so that light leakage caused by processing errors can be absorbed by the connecting portion 1224. In other embodiments, the connecting portion 1224 may not be light-absorbing, and the present invention does not limit this.

[0056] The light-shielding structure 12 also includes a light-shielding cover 125. The light-shielding cover 125 is also located within the mounting cavity 114. The light-shielding cover 125 is located above the lens 11 and is fixedly connected to the lens 11.

[0057] Please see Figure 6 As shown, the light shield 125 is located at the opening of the light-emitting surface 117 of the mounting cavity 114. A snap-fit ​​portion 1251 is provided on the side of the light shield 125 facing the inner wall of the mounting cavity 114, and a mating portion 118 is provided on the inner wall of the mounting cavity 114 corresponding to the snap-fit ​​portion 1251. The light-shielding structure 12 is snapped into the mounting cavity 114 of the lens 11 via the snap-fit ​​portion 1251 and the mating portion 118. Through the design of the snap-fit ​​portion 1251 and the mating portion 118, the light-shielding structure 12 can be easily and securely snapped into the mounting cavity 114 of the lens 11. This installation method eliminates the need for complex tools and additional fasteners, greatly simplifying the assembly process and improving production efficiency. Simultaneously, the snap-fit ​​structure also facilitates subsequent maintenance and replacement operations.

[0058] In this embodiment, the snap-fit ​​portion 1251 is a snap-fit ​​protrusion, and the mating portion 118 is a snap-fit ​​groove. In other embodiments, the snap-fit ​​portion 1251 is a snap-fit ​​groove, and the mating portion 118 is a snap-fit ​​protrusion.

[0059] Meanwhile, the plane of the light-emitting side 112 of the light-shielding cover 125 is flush with the light-emitting surface 117, maintaining overall aesthetics and compactness while also sealing the opening of the light-emitting surface 117. It cooperates with the first light-shielding component 121 to seal the entire mounting cavity 114. The light-shielding cover 125 is made of light-absorbing material and has light-absorbing properties. When errors occur in the processing or installation of the various structures of the light distribution assembly 1, causing some stray light to escape into the mounting cavity 114, this stray light will be absorbed by the light-shielding cover 125, ensuring that there is no light leakage or light spot formation.

[0060] In this embodiment, the light-shielding structure 12 is an integrated structure. In other embodiments, the light-shielding structure 12 may also be provided in separate parts.

[0061] In summary, the lamp 100 of this embodiment includes a lens 11 and a light-shielding structure 12. The lens 11 includes an incident surface 115, a reflecting surface 116, and an emitting surface 117. The light-shielding structure 12 includes a first light-shielding member 121 and a second light-shielding member 122. A portion of the light emitted from the light source module 2 directly hits the first light-shielding member 121 and the second light-shielding member 122 and is absorbed. A portion enters the reflecting surface 116 through the incident surface 115 and is reflected by the reflecting surface 116 before being emitted through the emitting surface 117. A portion undergoes Fresnel reflection on the incident surface 115 and is reflected back to the light-shielding structure 12 and absorbed. The cooperation between the lens 11 and the light-shielding structure 12 can reduce light loss, lower the risk of glare, effectively absorb stray light, and make the lamp 100 emit more uniform light.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A light distribution component, characterized in that, include: The lens (11) has an incident light side (111) and an exit light side (112) facing each other. The lens (11) has an exit light surface (117) on the exit light side (112). An incident light cavity (113) is formed inside the lens (11) and opens toward the incident light side (111). The cavity wall of the incident light cavity (113) is an incident light surface (115), and the side of the outer wall of the lens (11) facing the incident light cavity (113) is a reflecting surface (116). A light-shielding structure (12) is disposed inside the light-entry cavity (113) for blocking light incident on the light-shielding structure (12); The lens (11) is configured to reflect the light incident on the light-incident cavity (113) and then emit it from the light-out surface (117).

2. The light distribution component according to claim 1, characterized in that, The lens (11) has a through cavity, which includes the light-incident cavity (113) and the mounting cavity (114) communicating with it. The mounting cavity (114) is located near the light-outceasing side (112), and the light-shielding structure (12) is fixed to the mounting cavity (114).

3. The light distribution component according to claim 1, characterized in that, The light-shielding structure (12) includes a first light-shielding member (121) and has a light-shielding surface (1211) facing the light source module (2).

4. The light distribution component according to claim 3, characterized in that, The surface of the light-shielding surface (1211) is provided with multiple recessed pyramidal structures.

5. The light distribution component according to claim 3, characterized in that, The light-shielding structure (12) further includes a second light-shielding member (122), which is connected to the first light-shielding member (121), and the first light-shielding member (121) is fixed to the lens (11) through the second light-shielding member (122).

6. The light distribution component according to claim 5, characterized in that, The second light-shielding member (122) is provided with a light-shielding column (1221) extending through the first light-shielding member (121) toward the light source module (2), and the light-shielding column is used to block the light reflected from the light-inlet cavity (113).

7. The light distribution component according to claim 1, characterized in that, The light-shielding structure (12) is made of light-absorbing material.

8. The light distribution component according to claim 1, characterized in that, The light-shielding structure (12) is an integrated structure.

9. The light distribution component according to claim 1, characterized in that, It also includes a light shield (125) located above the lens (11) and fixedly connected to the lens (11).

10. A lamp, characterized in that: It includes a light source module (2) and a light distribution component as described in any one of claims 1-9.

Images