Optical structure for large-angle linear illumination

Abstract

This application relates to an optical structure for wide-angle linear illumination, comprising a linear lens body and a linear anti-glare shield detachably connected to the linear lens body. The linear lens body includes a platform and a plurality of lenses arranged linearly and at intervals on the platform. The linear anti-glare shield includes a plurality of linearly distributed anti-glare shields, the number of which corresponds one-to-one with the number of lenses. The anti-glare shields are placed on the lenses at corresponding positions. The lenses generally exhibit a semi-grid Fresnel semi-convex lens structure. This application enables wide-angle grid linear illumination to simultaneously achieve good light spot, good anti-glare, and high efficiency.

Description

Technical Field

[0001] This application relates to the technical field of lighting equipment, and in particular to an optical structure for wide-angle linear lighting. Background Technology

[0002] Currently in the lighting field, grid lights, which mainly use incandescent lamps, are gradually being replaced by grid linear lighting with LEDs, lenses, and anti-glare covers.

[0003] For office lighting, the requirements are higher, with the core need being low glare (UGR < 19) and illuminance ≥ 500 lx. Simultaneously, users are increasingly inclined to use fewer, smaller luminaires to meet the lighting needs of the entire office area. This means that luminaires need larger beam angles and higher luminous flux. Additionally, most light spots require uniform transitions, minimal color difference, and inconspicuous yellow spots at the edges. In summary, the future requirements for linear luminaires are small size, wide beam angle, high efficiency, good light spot quality, and good glare reduction.

[0004] For the linear lighting commonly available on the market, there are mainly structures such as plastic reflectors, extruded lenses, linear diffusers, TIR lenses + anti-glare shields, and convex lenses + anti-glare shields. Each has its own advantages and disadvantages, but none of them can simultaneously meet the above optical requirements.

[0005] Plastic reflectors are designed with a wide angle and have a good anti-glare effect. However, due to the limitations of the mold draft angle, the wide-angle light spot will have a black band effect. In addition, reflectors have inherent structural defects and cannot be dustproof or waterproof when used alone.

[0006] Both extruded lenses and linear diffusers have the advantage of simple structure, but both have poor light spot effect, low efficiency, and severe glare.

[0007] The advantages of TIR lenses with anti-glare shields are high efficiency, but poor light spot effect and severe glare. In addition, due to the structural limitations of TIR lenses, it is impossible to design ultra-large angles, which limits the application scenarios.

[0008] A convex lens plus an anti-glare shield either results in severe glare, low efficiency, or poor light spot effect; it is impossible to satisfy all three simultaneously.

[0009] The purpose of this invention is to design a new optical structure that enables large-angle grid linear illumination to simultaneously achieve good light spot, good anti-glare, and high efficiency. Summary of the Invention

[0010] In order to enable wide-angle linear lighting to simultaneously achieve good light spot, good anti-glare and high efficiency, this application provides an optical structure for wide-angle linear lighting.

[0011] The optical structure for large-angle linear illumination provided in this application adopts the following technical solution:

[0012] An optical structure for wide-angle linear illumination includes a linear lens body and a linear anti-glare shield detachably connected to the linear lens body. The linear lens body includes a platform and a plurality of lenses arranged linearly and at intervals on the platform. The linear anti-glare shield includes a plurality of linearly distributed anti-glare shields. The number of anti-glare shields is consistent with the number of lenses and corresponds one-to-one. The anti-glare shields are placed on the lenses at corresponding positions. The lenses generally present a semi-grid Fresnel semi-convex lens structure.

[0013] By adopting the above technical solution, the lens is generally presented as a semi-grid Fresnel semi-convex lens structure, and the anti-glare cover is placed on the lens at the corresponding position, which can reduce the lens height, save material costs and obtain a larger shading angle, thereby improving efficiency and reducing glare.

[0014] Optionally, the lens includes an incident light side surface, an incident light pattern top surface, a light mixing structure, a light focusing structure, and a central mirror surface of the light emitting section. The incident light side surface, the incident light pattern top surface, and the light mixing structure are all disposed on the incident light part of the lens, and the light focusing structure and the central mirror surface of the light emitting section are all disposed on the light emitting section of the lens.

[0015] By adopting the above technical solutions, the design of the light-incident side and the top surface of the light-incident pattern allows light to effectively enter the lens and mix inside, reducing the bright ring phenomenon at the edge of the light spot and improving the uniformity and aesthetics of the light spot; the light mixing structure further optimizes the mixing process of light within the lens, effectively reducing glare and making the lighting more comfortable; the light-focusing structure not only improves the light-gathering ability but also ensures that large-angle light is not blocked by the anti-glare shield, thereby improving the overall lighting efficiency; the design of the central mirror surface of the light-emitting section makes the main light spot more concentrated and bright, enhancing the lighting effect while reducing glare problems.

[0016] Optionally, the light-incident side is the inner side of the light-incident portion of the lens, the light-incident pattern top surface is the inner top surface of the light-incident portion of the lens, and the light-mixing structure is a layered petal light-mixing structure.

[0017] By adopting the above technical solution, the light-incident side serves as the inner side of the light-incident part of the lens, ensuring that light can effectively enter the lens; the top surface of the light-incident pattern serves as the inner top surface of the light-incident part of the lens, further optimizing the incident path of light; in particular, the light mixing structure is designed as a layered petal light mixing structure, which not only solves the problem of bright rings formed around the light spot on the side of the light-incident part of the lens, reducing glare, but also beautifies the appearance of the lens and improves the overall visual effect.

[0018] Optionally, the central mirror of the light-emitting section is the center of the light-emitting section of the lens, and the light-gathering structure is a grid-type Fresnel light-gathering structure.

[0019] By adopting the above technical solutions, the mirror design at the center of the light-emitting part of the lens ensures concentrated light output, improving the brightness and uniformity of the light spot. At the same time, the light-gathering structure adopts a grid-type Fresnel light-gathering structure. This structure can not only effectively converge edge light, but also perform light mixing, reducing glare and improving the overall lighting effect. Specifically, the grid-type Fresnel light-gathering structure ensures that the large-angle light from the lens is not blocked by the anti-glare cover, thereby improving the light efficiency and ensuring that the light spot transition is uniform and without layering.

[0020] Optionally, the bottom opening of the anti-glare shield is the light inlet hole, the top opening of the anti-glare shield is the light outlet hole, and the inner side of the anti-glare shield is the optical surface.

[0021] By adopting the above technical solution, the bottom opening of the anti-glare shield serves as a light inlet hole to allow light to enter, while the top opening serves as a light outlet hole to ensure that light passes out smoothly. The inner side of the anti-glare shield serves as an optical surface, which can further optimize the light path and reduce unnecessary reflection and scattering, thereby significantly improving lighting quality and enhancing visual comfort.

[0022] Optionally, the platform has holes on its top surface, and the linear anti-glare cover is fixedly connected with buckles that engage with the holes.

[0023] By adopting the above technical solution, the linear anti-glare cover can be easily and quickly installed on the top surface of the platform, improving assembly efficiency. Meanwhile, the design of the snap-fit ​​and hole positions ensures the stability and reliability of the linear anti-glare cover, effectively reducing the possibility of loosening or falling off during use and guaranteeing stability.

[0024] Optionally, the linear anti-glare cover is provided with equally spaced limiting structures on both sides, and the linear anti-glare cover is limited on the platform by the limiting structures.

[0025] By adopting the above technical solution, the linear anti-glare cover is equipped with equally spaced limiting structures on both sides, ensuring the stable installation of the linear anti-glare cover on the platform.

[0026] Optionally, multiple buckles are provided, and the number of holes corresponds to the number of buckles.

[0027] By adopting the above technical solution, the one-to-one correspondence between multiple buckles and holes not only improves the installation accuracy, but also enhances the stability and reliability of the linear anti-glare cover, effectively reducing the problem of uneven light spots or glare caused by loosening.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The lens is generally a semi-grid Fresnel semi-convex lens structure, and the anti-glare cover is placed on the lens at the corresponding position, which can reduce the lens height, save material costs and obtain a larger shading angle, thereby improving efficiency and reducing glare.

[0030] 2. The design of the light-incident side and the top surface with the light-incident pattern allows light to enter the lens effectively and mix internally, reducing the bright ring phenomenon at the edge of the light spot and improving the uniformity and aesthetics of the light spot; the light mixing structure further optimizes the light mixing process within the lens, effectively reducing glare and making the lighting more comfortable; the light-focusing structure not only improves the light-gathering ability but also ensures that large-angle light is not blocked by the anti-glare shield, thereby improving the overall lighting efficiency; the design of the central mirror surface of the light-emitting section makes the main light spot more concentrated and bright, enhancing the lighting effect while reducing glare problems;

[0031] 3. The bottom opening of the anti-glare shield serves as a light inlet, allowing light to enter, while the top opening serves as a light outlet, ensuring that light passes through smoothly. The inner surface of the anti-glare shield, as an optical surface, can further optimize the light path, reduce unnecessary reflections and scattering, thereby significantly improving lighting quality and enhancing visual comfort. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of this application.

[0033] Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0034] Figure 3 This is a schematic diagram of the platform and lens structure of this application.

[0035] Figure 4 This is a structural schematic diagram of the platform and lens from another perspective in this application.

[0036] Figure 5 This is a cross-sectional view of the lens in this application.

[0037] Figure 6 This is a cross-sectional view of the anti-glare shield of this application.

[0038] Figure 7 This is the optical path diagram of the non-grid Fresnel semi-convex lens structure of this application.

[0039] Figure 8 This is the optical path diagram of the non-grid Fresnel convex lens structure of this application.

[0040] Figure 9 This is the optical path diagram of the semi-lattice Fresnel semi-convex lens structure of this application.

[0041] Explanation of reference numerals in the attached diagram: 1. Platform; 11. Hole; 2. Linear anti-glare shield; 21. Light inlet hole of the anti-glare shield; 22. Light outlet hole of the anti-glare shield; 23. Optical surface of the anti-glare shield; 24. Buckle; 25. Limiting post; 3. Light inlet side; 4. Light inlet patterned top surface; 5. Layered petal light mixing structure; 6. Grid Fresnel light focusing structure; 7. Center mirror of the light outlet surface. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0043] This application discloses an optical structure for wide-angle linear illumination. (Refer to...) Figure 1 and Figure 2 The optical structure of the wide-angle linear lighting includes a linear lens body and a linear anti-glare cover 2 detachably connected to the linear lens body. The lens of the linear lens body generally presents a semi-grid Fresnel semi-convex lens structure. The linear lens body is applied to various linear lamps, and the position of the light-emitting part on the linear lamp corresponds to the position of the lens on the linear lens body. By combining the lens, which generally presents a semi-grid Fresnel semi-convex lens structure, with the anti-glare cover on the linear anti-glare cover 2, the effects of good light spot, good anti-glare and high efficiency are achieved.

[0044] The linear lens body includes a platform 1 and multiple lenses arranged linearly and at intervals on the platform 1. The platform 1 has a U-shaped cross-section with its opening facing downwards. The platform 1 and the multiple linearly distributed lenses are seamlessly connected to form the linear lens body. The linear anti-glare shield 2 is detachably connected to the top surface of the platform 1. The linear anti-glare shield 2 includes multiple anti-glare shields, which are linearly distributed and form an integrated linear anti-glare shield 2. The number of anti-glare shields is consistent with the number of lenses and corresponds one-to-one. The anti-glare shields are placed on the lenses at the corresponding positions.

[0045] Reference Figure 3-5 The lens includes an incident light side surface 3, an incident light patterned top surface 4, a light mixing structure, a light-gathering structure, and a central mirror surface of the light-emitting section. The lens vertically penetrates the top surface of the platform 1, with the incident light part facing downwards and located on the inner top wall of the platform 1. The incident light side surface 3, the incident light patterned top surface 4, and the light mixing structure are all located on the incident light part of the lens. The light-emitting section of the lens faces upwards and is located on the top surface of the platform 1. The light-gathering structure and the central mirror surface of the light-emitting section are both located on the light-emitting section of the lens.

[0046] Specifically, the light-incident side 3 is the inner side of the light-incident portion of the lens, the light-incident pattern top surface 4 is the inner top surface of the light-incident portion of the lens, and the light-mixing structure is located on the outer side of the light-incident portion of the lens. The light-mixing structure is divided into multiple layers according to the height of the outer side of the light-incident portion of the lens, with each layer overlapping the others to form a layered light-mixing structure. At the same time, each layer of the light-mixing structure uses a fan-shaped structure in a circular array, with adjacent fan-shaped layers staggered and multiple layers of fan-shaped structures intersecting and staggering, so that the overall light-mixing structure resembles a petal, forming a layered petal light-mixing structure 5. Since light from the side of the light-incident portion of the lens easily forms a bright ring around the light spot, causing glare and discomfort, designing the light-mixing structure as a layered petal light-mixing structure 5 can solve this glare problem while also improving the appearance of the lens.

[0047] The central mirror of the light-emitting part is the center of the light-emitting part of the lens. The light-collecting structure is set on the outside of the light-emitting part of the lens. By setting the outside of the light-emitting part of the lens as a multi-layered convex ring structure and dividing each ring into N grids, the grids of adjacent two rings are staggered and intersected to form a grid-type Fresnel light-collecting structure 6 on the outside of the light-emitting part of the lens. In addition, the presence of the central mirror 7 of the light-emitting surface makes the lens present an overall semi-grid-type Fresnel semi-convex lens structure.

[0048] Due to the size limitations of the anti-glare shield, it is easy to block the large-angle light from the lens, thereby reducing efficiency. Therefore, based on the principle of the direct correspondence between the position of the light spot area and the position of the lens light output, that is, the edge light of the light spot corresponds to the grid-type Fresnel focusing structure 6, and the center light corresponds to the center mirror surface 7 of the light output surface, a grid-type Fresnel focusing structure 6 was designed. This ensures that the edge light is better focused while also performing light mixing. This ensures that the large-angle light from the lens will not be blocked by the anti-glare shield after the lens is paired with the anti-glare shield, thereby improving efficiency. In addition, the light spot transition is uniform and there is no layering phenomenon.

[0049] Reference Figure 2 and Figure 6The top surface of platform 1 has hole groups on both sides, each group including multiple linearly distributed and spaced holes 11; the holes 11 in the two groups are staggered. The anti-glare cover is a hollow cover with openings at both the top and bottom; the bottom opening of the anti-glare cover is the light inlet hole 21, the top opening is the light outlet hole 22, and the inner side is the optical surface 23; the linear anti-glare cover 2 is fixedly connected with buckles 24 corresponding to the positions of the holes 11, and the buckles 24 engage with the corresponding holes 11 to fix the linear anti-glare cover 2 to the top surface of platform 1. In order to make the linear anti-glare cover 2 more securely fixed to the top surface of platform 1, the linear anti-glare cover 2 has equally spaced limiting structures on both sides, and the linear anti-glare cover 2 is limited on platform 1 by the limiting structures. In this embodiment, the limiting structure is a cylindrical limiting post 25 fixedly connected to the side of the linear anti-glare cover 2. The cross-sectional area of ​​the limiting post 25 gradually decreases from top to bottom. When the buckle 24 is engaged with the corresponding hole 11, the two sides of the platform 1 are limited between the limiting posts 25 on both sides of the linear anti-glare cover 2.

[0050] Reference Figure 7-9 The light spot is mainly formed by the refraction of light through the lens. The optical path diagram mainly consists of three parts: First, the light is refracted to the outer side by the incident light side 3, and after being mixed by the layered petal light mixing structure 5, it is refracted to the top surface or the outermost side of the lens to form residual light. Second, the light is refracted to the center mirror surface 7 of the light-emitting surface by the top surface 4 of the incident light pattern, and the light in this part is not blocked by the anti-glare shield. Third, the light is refracted to the grid-like Fresnel light-gathering structure 6 by the top surface 4 of the incident light pattern, and after being refracted by the grid-like Fresnel light-gathering structure 6, most of the light in this part will be superimposed on the main light spot, and a small part of the light will be blocked by the optical surface 23 of the anti-glare shield to reduce glare.

[0051] Reference Figure 7 When the lens is a non-grid Fresnel semi-convex lens structure, the shading angle α is large, and the large-angle light rays of the lens will be blocked by the anti-glare cover, reducing efficiency.

[0052] Reference Figure 8 When the lens is a non-grid Fresnel convex lens structure, the light blocking angle α is small, and the large-angle light rays of the lens will not be blocked by the anti-glare cover. However, the lens height is high, which is not conducive to saving material costs.

[0053] Reference Figure 9 When the lens is a semi-lattice Fresnel semi-convex lens structure, the light-blocking angle α is large, and the large-angle light rays of the lens will not be blocked by the anti-glare cover. It also reduces the lens height, which saves material costs and achieves a larger light-blocking angle.

[0054] The implementation principle of the optical structure of a large-angle linear illumination in this application embodiment is as follows: Compared with other linear illumination, the lens of this application adopts a layered petal light mixing structure 5 and a grid-type Fresnel light focusing structure 6, which generally presents a semi-grid-type Fresnel semi-convex lens structure, reducing the lens height, saving material costs and obtaining a larger light blocking angle, thereby improving efficiency and reducing glare.

Claims

1. An optical structure for large-angle linear illumination, characterized in that: The system includes a linear lens body and a linear anti-glare shield (2) detachably connected to the linear lens body. The linear lens body includes a platform (1) and a plurality of lenses arranged linearly and at intervals on the platform (1). The linear anti-glare shield (2) includes a plurality of anti-glare shields arranged linearly. The number of anti-glare shields is consistent with the number of lenses and corresponds one-to-one. The anti-glare shields are placed on the lenses at the corresponding positions. The lenses generally present a semi-grid Fresnel semi-convex lens structure. The lens includes an incident light side surface (3), an incident light pattern top surface (4), a light mixing structure, a light focusing structure, and a light emitting central mirror surface. The incident light side surface (3), the incident light pattern top surface (4), and the light mixing structure are all disposed on the incident light part of the lens, and the light focusing structure and the light emitting central mirror surface are all disposed on the light emitting part of the lens. The light-incident side (3) is the inner side of the light-incident part of the lens, the light-incident pattern top surface (4) is the inner top surface of the light-incident part of the lens, the light mixing structure is set on the outer side of the light-incident part of the lens, the light mixing structure is divided into multiple layers according to the height of the outer side of the light-incident part of the lens, and the layers are superimposed to form a layered light mixing structure. Each layer of the light mixing structure uses a fan-shaped structure in a circular array, the fan-shaped structures of adjacent two layers are staggered, and the multiple fan-shaped structures are staggered to make the overall light mixing structure petal-shaped, so as to form a layered petal light mixing structure (5). The central mirror of the light-emitting part is the center of the light-emitting part of the lens. The light-concentrating structure is set on the outside of the light-emitting part of the lens. By setting the outside of the light-emitting part of the lens as a multi-layered convex ring structure and dividing each ring into N grids, the grids of adjacent rings are staggered and intersected to form a grid-type Fresnel light-concentrating structure on the outside of the light-emitting part of the lens (6). The bottom opening of the anti-glare shield is the light inlet hole (21), the top opening of the anti-glare shield is the light outlet hole (22), and the inner side of the anti-glare shield is the optical surface (23).

2. The optical structure for large-angle linear illumination according to claim 1, characterized in that: The platform (1) has a hole (11) on its top surface, and the linear anti-glare cover (2) is fixedly connected with a buckle (24) that engages with the hole (11).

3. The optical structure for large-angle linear illumination according to claim 1, characterized in that: The linear anti-glare shield (2) is provided with equally spaced limiting structures on both sides, and the linear anti-glare shield (2) is limited on the platform (1) by the limiting structures.

4. The optical structure for large-angle linear illumination according to claim 2, characterized in that: The buckle (24) is provided in multiple ways, and the number of holes (11) is consistent with the number of buckles (24) and corresponds one-to-one.

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