Directional non-imaging polarizing lens and light emitting device

Abstract

The application belongs to the technical field of lamps and lanterns, and provides a directional non-imaging polarizing lens, which is installed on an LED light emitter, the LED light emitter is installed on a substrate, a cavity is arranged on the end face of the directional non-imaging polarizing lens close to the LED light emitter, the cavity is sleeved on the periphery of the LED light emitter, and the inner wall of the cavity is an incident surface; the directional non-imaging polarizing lens is provided with a reflecting surface and an exit surface, the reflecting surface is arranged on the end face of the directional non-imaging polarizing lens close to the LED light emitter, the outer side wall and the partial area of the end face away from the LED light emitter, and the exit surface is arranged on the entire area of the end face of the directional non-imaging polarizing lens away from the LED light emitter; and the exit surface and the reflecting surface overlap in the partial area. While realizing the directional emission of light, the application ensures that the heat is not accumulated in the interior of the directional non-imaging polarizing lens, and can realize a good directional wall washing type irradiation effect in a special application environment where the angle of the lamp cannot be adjusted.

Description

Technical Field

[0001] This invention belongs to the field of lighting technology, specifically relating to a directional non-imaging polarizing lens and a light-emitting device. Background Technology

[0002] With the improvement of lighting quality, people have increasingly higher requirements for the effects of scene-based wall washer lighting. They demand that the light source be visible but the lamp itself not. To achieve this visual effect, a common approach is to increase the number of lighting fixtures and use long-range illumination. This significantly increases costs, placing a financial burden on both businesses and consumers. Furthermore, to meet the glare requirements of GB50034-2010 Architectural Lighting Standard, some strong light rays within the visible angle are blocked with completely opaque objects. This results in a surge in heat generation from the lamps, which can easily lead to short circuits and fires, posing a safety hazard. To control costs and reduce the number of light sources, a multi-lens combination is generally used. However, existing lenses, limited by their shape and other factors, still have unsatisfactory light distribution and utilization effects, failing to achieve the desired directional wall washer lighting effect in special application environments where the lamp angle cannot be adjusted. Summary of the Invention

[0003] In order to overcome the limitations of existing technologies, the purpose of this invention is to provide a directional non-imaging polarizing lens that can effectively achieve directional illumination for wall washing in special application environments.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: a directional non-imaging polarizing lens, wherein the directional non-imaging polarizing lens is mounted on an LED light-emitting body, the LED light-emitting body is mounted on a substrate, the end face of the directional non-imaging polarizing lens near the LED light-emitting body has a cavity, the cavity is fitted around the LED light-emitting body, and the inner wall of the cavity is the incident surface; the directional non-imaging polarizing lens has a reflecting surface and an exiting surface, the reflecting surface is provided on the end face of the directional non-imaging polarizing lens near the LED light-emitting body, the outer wall, and a portion of the end face away from the LED light-emitting body, and the exiting surface is provided in the entire area of ​​the end face of the directional non-imaging polarizing lens away from the LED light-emitting body; the exiting surface and the reflecting surface overlap in a partial area.

[0005] The working principle of this scheme is as follows: An incident surface, a reflecting surface, and an exit surface are set on a directional non-imaging polarizing lens. The incident surface is placed on the outside of the LED light source. The light emitted by the LED light source enters the directional non-imaging polarizing lens through the incident surface. After entering the directional non-imaging polarizing lens, some of the light will be emitted directly from the exit surface, while the rest will be emitted towards the reflecting surface. Then, the light will be refracted by the reflecting surface and emitted towards the exit surface, thereby converging the light to the exit surface and emitting it from the exit surface, forming a directional light source. Secondly, the exit surface and the reflecting surface overlap in some areas, allowing some of the light to be emitted from the overlapping part, which plays a guiding role.

[0006] Preferably, the cavity narrows inward on the side facing away from the LED light source, and the end of the cavity is provided with irregular patterns. The part of the cavity with irregular patterns is the second incident surface, and the rest of the cavity excluding the second incident surface is the first incident surface.

[0007] Preferably, the first incident surface satisfies the numerical formula for a parabolic arc surface: y = ax 2 , where a = -0.482 to -0.215, and the parabolic arc of the first incident surface is perpendicular to the substrate surface.

[0008] Preferably, the second incident surface satisfies the numerical formula for a parabolic arc surface: y = bx 2 , where b = -0.308 to -0.132, and the parabolic arc of the second incident surface is perpendicular to the substrate surface.

[0009] Preferably, the reflective surface includes a first reflective surface, a second reflective surface, and a third reflective surface; the third reflective surface is the end face close to the LED light source, the second reflective surface is the outer wall of the directional non-imaging polarizing lens, and the first reflective surface is located on the end face away from the third reflective surface; the emission surface includes a first emission surface and a second emission surface, the first emission surface completely overlapping the first reflective surface; one side of the second reflective surface is connected to one side of the third reflective surface, the other side of the second reflective surface is connected to one side of the first reflective surface and the second emission surface respectively, and the other side of the first reflective surface is connected to the other side of the second emission surface.

[0010] Preferably, the first exiting surface and the first reflecting surface satisfy the numerical formula for a parabolic arc surface: y = cx 2 , where c = 0.04 to 0.06.

[0011] Preferably, the second exit surface satisfies the numerical formula y = dx for a parabolic arc surface. 2 , where d = -0.06 to -0.04.

[0012] Preferably, the second reflective surface is a cylindrical surface, and the surfaces of the second and third reflective surfaces are provided with a fully reflective layer.

[0013] Preferably, the first reflective surface is a concave arc surface, and the surface of the first reflective surface is provided with an incomplete reflective layer.

[0014] A light-emitting device includes an LED light emitter and a directional non-imaging polarizing lens.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By setting an incident surface, a reflecting surface, and an exit surface on a directional non-imaging polarizing lens, light enters the lens from the incident surface, some light exits from the exit surface, and the rest of the light can also exit from the exit surface through the reflecting surface. The reflecting surface directly reflects the light out, ensuring that all light exits from the exit surface. This achieves directional light emission while ensuring that heat does not accumulate inside the directional non-imaging polarizing lens. In special application environments where the luminaire angle cannot be adjusted, it can achieve excellent directional wall-washing scene illumination effects, greatly reducing the number of luminaires used, saving costs, improving lighting effects and lighting quality, preventing glare, and improving visual comfort. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the directional non-imaging polarizing lens;

[0019] Figure 2 This is a schematic diagram of the overall directional non-imaging polarizing lens;

[0020] Figure 3 This is a top view of the directional non-imaging polarizing lens;

[0021] Figure 4 This is a schematic diagram of a cavity;

[0022] Figure 5 This is a diagram illustrating the light rays;

[0023] 1. Cavity; 2. Incident surface; 20. First incident surface; 21. Second incident surface; 3. Reflecting surface; 30. First reflecting surface; 31. Second reflecting surface; 32. Third reflecting surface; 4. Exit surface; 40. First exit surface; 41. Second exit surface; 5. LED light source; 6. Substrate. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of the present invention; the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] like Figures 1-4 As shown, the directional non-imaging polarizing lens according to an embodiment of the present invention may include an incident surface 2, a reflecting surface 3, and an exit surface 4.

[0027] In some optional embodiments, the directional non-imaging polarizing lens is generally cylindrical, with a cavity 1 at one end that is approximately semi-elliptical. The inward-facing side of the cavity 1 is narrower than the outward-facing side. Irregular patterns are provided on the inward-facing end of the cavity 1, and the portion covered by the irregular patterns is the first incident surface 20. The other part of the cavity 1 is a smooth surface, which is the second incident surface 21. When the directional non-imaging polarizing lens is installed, the cavity 1 is fitted around the LED light emitter 5, which is mounted on a substrate 6. The reason for this arrangement is that during the process of the LED light source 5 emitting light, most of the light will be emitted from the front, and only about 30%-40% of the light will enter from the side of the cavity 1. Therefore, when most of the light passes through the first incident surface 20 with irregular patterns, the light will be diffused and refracted to prevent too much light from converging at the end of the cavity 1 and generating too much heat. Since only about 30%-40% of the light enters from the second incident surface 21, it will not generate too much heat, so there is no need to set irregular patterns, thereby reducing processing costs.

[0028] The section of the cylinder with the cavity 1 is designated as the third reflecting surface 32, the outer wall of the cylinder is designated as the second reflecting surface 31, and the other end of the cylinder is composed of two arc surfaces. The outward-facing arc surface is the second emission surface 41, and the inward-facing arc surface is the first emission surface and also the first reflecting surface 30. A fully reflective layer is coated on the outer layer of the second reflecting surface 31 and the third reflecting surface 32, so that all light entering the second reflecting surface 31 and the third reflecting surface 32 will be reflected. An incompletely reflective layer is coated on the surface of the first reflecting surface 30, so that when light reaches the first reflecting surface 30, approximately 30% of the light will pass through the first reflecting surface 30, and the remaining 70% of the light will be reflected by the incompletely reflective layer.

[0029] In further preferred embodiments, such as Figure 3 The cross-sectional view of the directional non-imaging polarizing lens shown indicates that the first incident surface 20 is a parabola at one end, with the numerical formula y = ax², where a = -0.482 to -0.215. This numerical formula is based on the lens's conventional placement orientation, where the LED emitter 5 is at the bottom, and the parabola's opening faces downwards. However, this product can also be placed in various orientations as needed, and the shape and structure of the second incident surface 21 will not change due to the placement orientation. In one embodiment, a = -0.413.

[0030] In further preferred embodiments, such as Figure 3 The cross-sectional view of the directional non-imaging polarizing lens shown indicates that the second incident surface 21 is also a parabola at one end, and the numerical formula for the arc surface of this parabola satisfies y = bx², where b = -0.308 to -0.132. The above numerical formula is obtained with the lens in its conventional placement orientation. The second incident surface 21 is connected to the first incident surface 20, therefore the shape and structure of the second incident surface 21 will not change due to the placement orientation. In one embodiment, b = -0.294.

[0031] In a further preferred embodiment, irregular textures are formed on the second incident surface 21, consisting of several three-dimensional etched curved surfaces. Each three-dimensional etched texture has a height of 0.125–0.186 mm and an irregular shape. The texture plate number can be MT-11100, MT-11305, or MT-11310. More preferably, the texture plate is MT-11305, with a height of 0.1285 mm. The irregular textures on the second incident surface 21 effectively disperse and propagate the highly concentrated light beam uniformly.

[0032] In a further preferred embodiment, the first exit surface 40 and the first reflective surface 30 satisfy the numerical formula for a parabolic arc surface: y = cx², where c = 0.04 to 0.06. The above numerical formula is obtained with the lens in its conventional placement direction. The first exit surface 40 and the first reflective surface 30 completely overlap, and 30% of the light rays are emitted from the first reflective surface 30. Since the first reflective surface 30 can be approximately regarded as a concave mirror structure, the light rays will be emitted through the first reflective surface 30 and converge, thereby projecting a light path onto the road or wall, playing a guiding role.

[0033] In a further preferred embodiment, the second exit surface 41 is a parabolic arc surface, the numerical formula of which is y = dx², where d = -0.06 to 0.04. This numerical formula is obtained based on the lens's conventional placement orientation. Since the second exit surface 41 is connected to the first exit surface 40, the second reflecting surface 31 can be approximated as a convex mirror structure. Light rays will pass through the second exit surface 41 and diverge, preventing glare and improving visual comfort.

[0034] In a further preferred embodiment, the surface of the first reflective surface 30 is coated with a composite coating material with a reflectivity of 70% and a transmittance of 30%, the thickness of the coating composite material is 0.13-0.15 micrometers, and the composite material is nickel + chromium + PET.

[0035] In a further preferred embodiment, the surfaces of the second reflective surface 31 and the third reflective surface 32 are coated with a composite coating material with a reflectivity of 100%, the thickness of the coating composite material is 0.32-0.4 micrometers, and the composite material is nickel + chromium + PET.

[0036] In a further embodiment, a specific path of light from the LED light source 5 is described. Light ray L1 enters from the first incident surface 20, is refracted by the first incident surface 20 and directly enters the second exit surface 41, and is finally refracted by the second exit surface 41 and projected onto the wall as light ray L1-1.

[0037] In a further embodiment, an alternative path for light rays after the LED light source 5 is described. Light ray L1 enters from the first incident surface 20, is refracted parabolically, and then travels to the second reflecting surface 31. After refraction by the second reflecting surface 31, light ray L1-2 travels to the first reflecting surface 30. Then, 70% of the light ray L1-2 is reflected and exits from the second exit surface 41 as light ray 1-3, which is then projected in front. The remaining 30% of the light ray passes through the first exit surface 40 and exits as light ray L1-4, which converges through the first exit surface 40 to form a light path.

[0038] In a further embodiment, another path of light after the LED light source 5 is specifically described. Light L2 enters from the second incident surface 21 and is dispersed into multiple light rays L2-1 by the scattering effect of the irregular texture. After being refracted by the second exit surface 41, light rays L2-2 are projected onto the wall.

[0039] In a further embodiment, another path of light from the LED light source 5 is described. Light ray L3 enters from the first incident surface 20, is refracted by the first incident surface 20 to the second reflecting surface 31, and is refracted by the second reflecting surface 31 to the second exiting surface 41. Finally, light ray L3-1 exits from the second exiting surface 41 and is projected in front.

[0040] In a further embodiment, another path of light from the LED light source 5 is described. Light ray L4 enters from the first incident surface 20, is refracted by the first incident surface 20 to the third reflecting surface 32, and is refracted by the third reflecting surface 32 to the second exit surface 41. Finally, light ray L4-1 exits from the second exit surface 41 and is projected in front.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A directional non-imaging polarized lens, the directional non-imaging polarized lens is installed on an LED light emitter, the LED light emitter is installed on a substrate, characterized in that, the directional non-imaging polarized lens is provided with a cavity near the end face of the LED light emitter, the cavity is sleeved on the periphery of the LED light emitter, and the inner wall of the cavity is an incident surface; the directional non-imaging polarized lens is provided with a reflecting surface and an exit surface, the reflecting surface is provided on the end face of the directional non-imaging polarized lens close to the LED light emitter, the outer lateral wall of the directional non-imaging polarized lens, and part of the end face of the directional non-imaging polarized lens away from the LED light emitter, the exit surface is provided on the entire area of the end face of the directional non-imaging polarized lens away from the LED light emitter, and the exit surface and the reflecting surface overlap in part; the reflecting surface comprises a first reflecting surface, a second reflecting surface, and a third reflecting surface; the third reflecting surface is the end face close to the LED light emitter, the second reflecting surface is the outer lateral wall of the directional non-imaging polarized lens, and the first reflecting surface is provided on the end face away from the third reflecting surface; the exit surface comprises a first exit surface and a second exit surface, and the first exit surface completely overlaps the first reflecting surface; one side of the second reflecting surface is connected with one side of the third reflecting surface, the other side of the second reflecting surface is connected with one side of the first reflecting surface and the second exit surface respectively, and the other side of the first reflecting surface is connected with the other side of the second exit surface; the side of the cavity away from the LED light emitter continuously narrows inward, the end of the cavity is provided with irregular lines, the part of the cavity provided with the irregular lines is a second incident surface, and the rest of the cavity except the second incident surface is a first incident surface. 2.The directional non-imaging polarized lens according to claim 1, characterized in that, the first incident surface satisfies the numerical formula y=ax2 of a parabolic arc surface, wherein a=-0.482~-0.215, and the parabolic arc surface of the first incident surface is perpendicular to the surface of the substrate. 3.The directional non-imaging polarized lens according to claim 1, characterized in that, the second incident surface satisfies the numerical formula y=bx2 of a parabolic arc surface, wherein b=-0.308~-0.132, and the parabolic arc surface of the second incident surface is perpendicular to the surface of the substrate. 4.The directional non-imaging polarized lens according to claim 1, characterized in that, the first exit surface and the first reflecting surface satisfy the numerical formula y=cx2 of a parabolic arc surface, wherein c=0.04~0.06, and the parabolic arc surface of the first exit surface and the first reflecting surface is perpendicular to the surface of the substrate. 5.The directional non-imaging polarized lens according to claim 1, characterized in that, the second exit surface satisfies the numerical formula y=dx2 of a parabolic arc surface, wherein d=-0.06~-0.04, and the parabolic arc surface of the second exit surface is perpendicular to the surface of the substrate. 6.The directional non-imaging polarized lens according to claim 1, characterized in that, the second reflecting surface is a cylindrical surface, and the surfaces of the second reflecting surface and the third reflecting surface are provided with a complete reflecting layer.

7. The directional non-imaging polarizing lens of claim 1, wherein, the first reflecting surface is a concave surface, and the first reflecting surface is provided with an incomplete reflecting layer.

8. A light-emitting device, characterized in that, A LED light emitter and the directional non-imaging polarizing lens of any one of claims 1-7.

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