Optical structure for wide-angle linear illumination

Abstract

The invention relates to a wide-angle linear lighting optical structure which comprises a linear lens body and a linear anti-dazzle cover body detachably connected to the linear lens body, the linear lens body comprises a platform and a plurality of lenses which are linearly distributed and arranged on the platform at intervals, and the linear anti-dazzle cover body comprises a plurality of anti-dazzle covers which are linearly distributed. The number of the anti-dazzle covers is consistent with that of the lenses, the anti-dazzle covers and the lenses are in one-to-one correspondence, the anti-dazzle covers cover the lenses corresponding to the anti-dazzle covers in position, and the lenses are of a semi-lattice type Fresnel semi-convex lens structure on the whole. The large-angle grating linear illumination device has the advantages that large-angle grating linear illumination can meet the requirements of good light spots, good anti-dazzle performance and high efficiency at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of lighting equipment, and in particular to an optical structure of large-angle linear lighting. Background Art

[0002] Currently in the lighting field, grille lights based mainly on incandescent lamps are gradually being replaced by grille linear lighting such as LED+lens+anti-glare cover.

[0003] For office lighting, the lighting requirements are higher, and the core requirement is low glare with UGR < 19 and illumination ≥ 500 lx. At the same time, users tend to use fewer small-sized lamps to meet the lighting of the entire office area, which means that the lamps need a larger beam angle and higher luminous flux. In addition, most light spots require uniform transition, small color difference, and unobvious yellow spots on the edges. In general, the general requirements for future linear lamps are small size, large angle, high efficiency, good light spot, and good anti-glare.

[0004] For the common linear lighting on the market, there are mainly plastic reflector cups, extruded lenses, linear diffuser covers, TIR lenses + anti-glare covers, convex lenses + anti-glare covers and other structures. Each has its own advantages and disadvantages, but none of them can meet the above optical requirements at the same time.

[0005] The plastic reflector is designed with a large angle and has a good anti-glare effect. However, due to the limitation of the plastic mold's mold opening angle, its large-angle light spot will have a black band effect. In addition, the reflector has natural structural defects and cannot be dust-proof and waterproof when used alone.

[0006] The advantages of the extruded lens and the linear diffuser are simple structures, but the light spot effects of both are very poor, the efficiency is low, and the glare is severe.

[0007] The advantage of TIR lens + anti-glare cover is high efficiency, but the light spot effect is poor and the glare is serious. In addition, due to the structural limitations of the TIR lens, it is impossible to design an ultra-large angle, which limits the application scenarios.

[0008] Convex lens + anti-glare cover either has severe glare, low efficiency or poor light spot effect, and it is impossible to meet all three requirements at the same time.

[0009] The purpose of the present invention is to design a new optical structure so that the grid linear lighting with a large angle can simultaneously meet the requirements of good light spot, good anti-glare and high efficiency. Summary of the invention

[0010] In order to make the large-angle grid linear lighting meet the requirements of good light spot, good anti-glare and high efficiency at the same time, the present application provides an optical structure of large-angle linear lighting.

[0011] The optical structure of a large-angle linear lighting provided in this application adopts the following technical solution: An optical structure for large-angle linear lighting comprises a linear lens body and a linear anti-glare cover body detachably connected to the linear lens body, wherein the linear lens body comprises a platform and a plurality of lenses linearly distributed and arranged at intervals on the platform, wherein the linear anti-glare cover body comprises a plurality of linearly distributed anti-glare covers, wherein the number of the anti-glare covers is consistent with the number of the lenses and corresponds one to one, wherein the anti-glare covers are arranged on lenses at corresponding positions, and wherein the lenses generally present a semi-lattice Fresnel semi-convex lens structure.

[0012] By adopting the above technical solution, the lens generally presents a semi-grid Fresnel semi-convex lens structure, and the anti-glare cover is arranged on the lens at the corresponding position, which can reduce the height of the lens, save material costs and obtain a larger shading angle, thereby reducing glare while improving efficiency.

[0013] Optionally, the lens includes a light incident side surface, a top surface of a light incident pattern, a light mixing structure, a focusing structure, and a central mirror surface of the light output part. The light incident side surface, the top surface of the light incident pattern, and the light mixing structure are all arranged on the light incident part of the lens, and the focusing structure and the central mirror surface of the light output part are both arranged on the light output part of the lens.

[0014] By adopting the above technical scheme, the design of the light-entering side surface and the top surface of the light-entering pattern enables light to effectively enter the lens and mix inside, reducing the bright circle 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 in the lens, effectively reducing glare and making lighting more comfortable; the focusing structure not only improves the light gathering ability, but also ensures that large-angle light will not be blocked by the anti-glare cover, thereby improving the overall lighting efficiency; the design of the central mirror of the light-emitting part makes the main light spot more concentrated and brighter, enhancing the lighting effect while reducing the glare problem.

[0015] Optionally, the light incident side surface is the inner side surface of the light incident portion of the lens, the top surface of the light incident pattern is the inner top surface of the light incident portion of the lens, and the light mixing structure is a stacked petal light mixing structure.

[0016] By adopting the above technical scheme, the light incident side surface serves as the inner side surface of the light incident part of the lens, ensuring that the light can effectively enter the interior of 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 the light; in particular, the light mixing structure is designed as a stacked petal light mixing structure, which not only solves the problem of bright circle formed by the side light of the lens light incident part on the periphery of the light spot, reduces glare, but also beautifies the appearance of the lens and enhances the overall visual effect.

[0017] Optionally, the central mirror surface of the light-emitting portion is the center of the light-emitting portion of the lens, and the focusing structure is a lattice Fresnel focusing structure.

[0018] By adopting the above technical solution, the mirror design in the center of the light-emitting part of the lens ensures the concentrated output of light and improves the brightness and uniformity of the light spot; at the same time, the focusing structure adopts a grid-type Fresnel focusing structure, which can not only effectively gather edge light, but also perform mixed light processing, reduce glare problems, and improve the overall lighting effect; specifically, the grid-type Fresnel focusing structure prevents the large-angle light of the lens from being blocked by the anti-glare cover, thereby improving the lighting efficiency, while also ensuring that the light spot transition is uniform and without stratification.

[0019] Optionally, the bottom opening of the anti-glare cover is a light entrance hole of the anti-glare cover, the top opening of the anti-glare cover is a light exit hole of the anti-glare cover, and the inner side surface of the anti-glare cover is an optical surface of the anti-glare cover.

[0020] By adopting the above technical solution, the bottom opening of the anti-glare cover serves as a light entrance hole to allow light to enter, while the top opening serves as a light exit hole to ensure that light can be transmitted smoothly; the inner surface of the anti-glare cover serves as an optical surface to further optimize the light path and reduce unnecessary reflections and scattering, thereby significantly improving the lighting quality and enhancing visual comfort.

[0021] Optionally, a hole is formed on the top surface of the platform, and a buckle that engages with the hole is fixedly connected to the linear anti-glare cover.

[0022] By adopting the above technical solution, the linear anti-glare cover can be easily and quickly installed on the top surface of the platform, which improves the assembly efficiency. At the same time, the design of the buckle and the hole position ensures the stability and reliability of the linear anti-glare cover, effectively reduces the occurrence of loosening or falling off during use, and ensures stability.

[0023] Optionally, limiting structures arranged at equal intervals are provided on both sides of the linear anti-glare cover, and the linear anti-glare cover is limited on the platform by the limiting structures.

[0024] By adopting the above technical solution, limiting structures arranged at equal intervals are provided on both sides of the linear anti-glare cover, ensuring that the linear anti-glare cover is stably installed on the platform.

[0025] Optionally, the buckles are provided in plurality, and the number of the holes is consistent with the number of the buckles and corresponds one to one.

[0026] 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, and effectively reduces the uneven light spot or glare problem caused by looseness.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. The lens is generally a semi-lattice Fresnel semi-convex lens structure, and the anti-glare cover is set on the lens at the corresponding position, which can reduce the height of the lens, save material costs and obtain a larger shading angle, thereby improving efficiency and reducing glare; 2. The design of the light-entering side and the top surface of the light-entering pattern enables 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 light mixing process in the lens, effectively reducing glare and making lighting more comfortable; the focusing structure not only improves the light gathering ability, but also ensures that large-angle light will not be blocked by the anti-glare cover, thereby improving the overall lighting efficiency; the design of the central mirror of the light-emitting part makes the main light spot more concentrated and brighter, enhancing the lighting effect and reducing the glare problem; 3. The bottom opening of the anti-glare cover serves as a light entrance hole to allow light to enter, while the top opening serves as a light exit hole to ensure that light can be transmitted smoothly; the inner side of the anti-glare cover serves as an optical surface to further optimize the light path, reduce unnecessary reflections and scattering, thereby significantly improving the lighting quality and enhancing visual comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of this application.

[0029] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0030] Figure 3 It is a schematic diagram of the structure of the platform and lens of the present application.

[0031] Figure 4 It is a structural schematic diagram of the platform and lens of the present application from another perspective.

[0032] Figure 5 is a cross-sectional view of the lens of the present application.

[0033] Figure 6 It is a cross-sectional view of the anti-glare cover of the present application.

[0034] Figure 7 This is a light path diagram of the non-grid Fresnel semi-convex lens structure of the present application.

[0035] Figure 8 This is a light path diagram of the non-grid Fresnel convex lens structure of the present application.

[0036] Fig. 9 This is a light path diagram of the semi-lattice Fresnel semi-convex lens structure of the present application.

[0037] Explanation of the reference numerals in the accompanying drawings: 1. Platform; 11. Hole position; 2. Linear anti-glare cover body; 21. Light entrance hole of anti-glare cover; 22. Light exit hole of anti-glare cover; 23. Optical surface of anti-glare cover; 24. Buckle; 25. Limiting column; 3. Light entrance side; 4. Top surface of light entrance pattern; 5. Stacked petal light mixing structure; 6. Lattice Fresnel focusing structure; 7. Center mirror of light exit surface. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-9 This application is described in further detail.

[0039] The present application embodiment discloses an optical structure for large-angle linear lighting. Figure 1 and Figure 2 The optical structure of large-angle linear lighting includes a linear lens body and a linear anti-glare cover body 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 light-emitting part on the linear lamp is made to correspond to the position of the lens on the linear lens body. The lens that generally presents a semi-grid Fresnel semi-convex lens structure is matched with the anti-glare cover on the linear anti-glare cover body 2 to achieve the effects of good light spot, good anti-glare and high efficiency.

[0040] The linear lens body comprises a platform 1 and a plurality of lenses which are linearly distributed and arranged at intervals on the platform 1; the cross section of the platform 1 is U-shaped and its opening is arranged downward, and the platform 1 is seamlessly connected with the plurality of linearly distributed lenses to form a linear lens body; the linear anti-glare cover body 2 is detachably connected to the top surface of the platform 1. The linear anti-glare cover body 2 comprises a plurality of anti-glare covers which are linearly distributed and form an integrated linear anti-glare cover body 2; the number of anti-glare covers is consistent with the number of lenses and corresponds one to one, and the anti-glare covers are arranged on the lenses at corresponding positions.

[0041] Reference Figure 3-5 The lens includes a light-entering side surface 3, a light-entering pattern top surface 4, a light-mixing structure, a light-condensing structure, and a central mirror surface of the light-exiting portion; the lens vertically penetrates the top surface of the platform 1, the light-entering portion of the lens is arranged downward, and the light-entering portion of the lens is located on the inner top wall of the platform 1; the light-entering side surface 3, the light-entering pattern top surface 4, and the light-mixing structure are all arranged on the light-entering portion of the lens. The light-exiting portion of the lens is arranged upward, and the light-exiting portion of the lens is located on the top surface of the platform 1; the light-condensing structure and the central mirror surface of the light-exiting portion are all arranged on the light-exiting portion of the lens.

[0042] Specifically, the light-entering side surface 3 is the inner side surface of the lens light-entering part, the light-entering pattern top surface 4 is the inner top surface of the lens light-entering part, and the light-mixing structure is arranged on the outer side of the lens light-entering part. The light-mixing structure is divided into multiple layers according to the height of the outer side of the lens light-entering part, and the layers are superimposed on each other to form a laminated light-mixing structure; at the same time, each layer of the light-mixing structure uses a fan-shaped structure for a circular array, and the fan-shaped staggered distribution of two adjacent layers, and the multi-layer fan-shaped cross-staggered distribution, so that the overall light-mixing structure can be similar to a petal shape, to form a laminated petal light-mixing structure 5. Since the light from the side of the lens light-entering part is easy to form a bright circle around the light spot, and makes people feel dazzling and uncomfortable, the light-mixing structure is designed as a laminated petal light-mixing structure 5 to solve this part of the glare while also beautifying the appearance of the lens.

[0043] The central mirror surface of the light-emitting part is the center of the light-emitting part of the lens, and the focusing structure is arranged on the outside of the light-emitting part of the lens. The outside of the light-emitting part of the lens is arranged as a multi-layer convex tip ring structure, and each ring is divided into N grids, and the grids of two adjacent rings are staggered and cross-distributed, so that a grid-type Fresnel focusing structure 6 is formed on the outside of the light-emitting part of the lens; in addition, the existence of the central mirror surface 7 of the light-emitting surface makes the lens present a semi-grid-type Fresnel semi-convex lens structure as a whole.

[0044] Due to the size limitation of the anti-glare cover, the anti-glare cover can easily block the wide-angle light from the lens, thereby reducing efficiency. Therefore, according to the principle of positive correspondence between the position of the light spot area and the light emitting position of the lens, 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 emitting surface. The grid-type Fresnel focusing structure 6 is designed to ensure that the edge light is better gathered while performing light mixing processing, so that after the lens is matched with the anti-glare cover, the wide-angle light of the lens will not be blocked by the anti-glare cover, thereby improving efficiency. In addition, the light spot transition is uniform and there is no stratification phenomenon.

[0045] Reference Figure 2 and Figure 6, both sides of the top surface of the platform 1 are provided with hole groups, each of which includes a plurality of holes 11 that are linearly distributed and arranged at intervals; the holes 11 of the two hole groups are staggered. The anti-glare cover is a hollow cover body with openings at both ends; the bottom opening of the anti-glare cover is the anti-glare cover light entrance hole 21, the top opening of the anti-glare cover is the anti-glare cover light exit hole 22, and the inner side of the anti-glare cover is the anti-glare cover optical surface 23; the linear anti-glare cover body 2 is fixedly connected with a buckle 24 corresponding to the position of the hole 11, and the buckle 24 is engaged with the hole 11 corresponding to the position to fix the linear anti-glare cover body 2 on the top surface of the platform 1. In order to make the linear anti-glare cover body 2 more stably fixed on the top surface of the platform 1, both sides of the linear anti-glare cover body 2 are provided with equally spaced limiting structures, and the linear anti-glare cover body 2 is limited on the platform 1 by the limiting structures. In this embodiment, the limiting structure is a limiting column 25 which is cylindrical and fixedly connected to the side of the linear anti-glare cover 2. The cross-sectional area of ​​the limiting column 25 gradually decreases from top to bottom. When the buckle 24 is engaged with the corresponding hole 11, the two side surfaces of the platform 1 are limited between the limiting columns 25 on both sides of the linear anti-glare cover 2.

[0046] Reference Figure 7-9 , the light spot is mainly formed by refraction of light through the lens, and the optical path diagram mainly includes three parts; in the first part, the light is refracted to the outside through the light incident side 3, and after being mixed by the stacked petal light mixing structure 5, it is refracted to the top surface of the lens or the outermost side surface to form residual light. The second part: the light is refracted to the central mirror surface 7 of the light emitting surface through the top surface 4 of the light incident pattern, and is refracted to form the main light spot through the central mirror surface 7 of the light emitting surface. The light of this part is not blocked by the anti-glare cover. The third part: the light is refracted to the grid-type Fresnel focusing structure 6 through the top surface 4 of the light incident pattern, and is refracted out through the grid-type Fresnel focusing structure 6. Most of this part of the light 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 cover to reduce glare.

[0047] 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 of the lens will be blocked by the anti-glare cover, reducing the efficiency.

[0048] Reference Figure 8 When the lens is a non-grid Fresnel convex lens structure, the shading angle α is small, and the large-angle light of the lens will not be blocked by the anti-glare cover, but the lens height is high, which is not conducive to saving material costs.

[0049] Reference Fig. 9 When the lens is a semi-lattice Fresnel semi-convex lens structure, the shading angle α is large, the large-angle light of the lens will not be blocked by the anti-glare cover, and the height of the lens is reduced, which saves material costs and obtains a larger shading angle.

[0050] The implementation principle of the optical structure of a large-angle linear lighting in an embodiment of the present application is: compared with other linear lighting, the lens of the present application adopts a stacked petal light mixing structure 5 and a grid-type Fresnel focusing structure 6, which is generally a semi-grid-type Fresnel semi-convex lens structure, which reduces the height of the lens, saves material costs and obtains a larger shading angle, thereby improving efficiency and reducing glare.

Claims

1. An optical structure for large-angle linear lighting, characterized in that: The invention comprises a linear lens body and a linear anti-glare cover body (2) detachably connected to the linear lens body, wherein the linear lens body comprises a platform (1) and a plurality of lenses linearly distributed and arranged at intervals on the platform (1), wherein the linear anti-glare cover body (2) comprises a plurality of anti-glare covers linearly distributed, wherein the number of the anti-glare covers is consistent with the number of the lenses and corresponds one to one, wherein the anti-glare covers are arranged on the lenses at corresponding positions, and the lenses generally present a semi-lattice-type Fresnel semi-convex lens structure.

2. The optical structure of large-angle linear lighting according to claim 1, characterized in that: The lens comprises a light incident side surface (3), a light incident pattern top surface (4), a light mixing structure, a light focusing structure, and a central mirror surface of a light exit portion; the light incident side surface (3), the light incident pattern top surface (4), and the light mixing structure are all arranged on the light incident portion of the lens, and the light focusing structure and the central mirror surface of the light exit portion are all arranged on the light exit portion of the lens.

3. The optical structure of large-angle linear lighting according to claim 2, characterized in that: The light incident side surface (3) is the inner side surface 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 a stacked petal light mixing structure (5).

4. The optical structure of large-angle linear lighting according to claim 2, characterized in that: The central mirror surface of the light-emitting portion is the center of the light-emitting portion of the lens, and the light-focusing structure is a lattice-type Fresnel light-focusing structure (6).

5. The optical structure of large-angle linear lighting according to claim 1, characterized in that: The bottom opening of the anti-glare cover is an anti-glare cover light entrance hole (21), the top opening of the anti-glare cover is an anti-glare cover light exit hole (22), and the inner side surface of the anti-glare cover is an anti-glare cover optical surface (23).

6. The optical structure of large-angle linear lighting according to claim 1, characterized in that: A hole (11) is provided on the top surface of the platform (1), and a buckle (24) which is engaged with the hole (11) is fixedly connected to the linear anti-glare cover (2).

7. The optical structure of large-angle linear lighting according to claim 1, characterized in that: Limiting structures arranged at equal intervals are provided on both sides of the linear anti-glare cover (2), and the linear anti-glare cover (2) is limited on the platform (1) by the limiting structures.

8. The optical structure of large-angle linear lighting according to claim 6, characterized in that: A plurality of the buckles (24) are provided, and the number of the holes (11) is consistent with the number of the buckles (24) and corresponds one to one.

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