Lens with high luminous efficiency

Abstract

The utility model discloses a high luminous efficiency lens which comprises a lens body, the lens body is provided with an incident plane and an emergent plane, the lens body comprises a light gathering area arranged in the middle of the lens body and a light uniformizing area annularly arranged on the peripheral side of the light gathering area, the incident plane of the light gathering area is a plane and is smooth, and the emergent plane of the light uniformizing area is smooth. The emergent surface of the light gathering area is a convex surface and is provided with a Fresnel structure, the emergent surface of the light uniformizing area and the surface of the Fresnel structure are respectively provided with a light mixing fine structure, and the incident surface of the light uniformizing area is provided with a plurality of concentric and continuously distributed annular convex lines. The structural design of the incident plane and the emergent plane of the lens ensures the light transmittance of the lens, so that on the basis that the lens enables a lamp to achieve first-level energy efficiency or second-level energy efficiency, the requirement for high light efficiency is met, the effect that internal electronic elements, wires and other structures cannot be observed from the emergent plane side is achieved, the lens is suitable for aluminum substrates with different lamp bead arrangements, the applicability is wide, and the cost is low. The requirement for arrangement of the aluminum substrates is lowered, and the purchase cost of the aluminum substrates is lowered.

Description

Technical Field

[0001] The present application relates to the field of lens technology, and in particular to a high light efficiency lens. Background Art

[0002] In order to shield the downlight LED light source, lines and cables in the lamp to prevent them from being seen directly by users, there are generally two ways to process the lens. One is to design it to be milky white. This design can play a good shielding role on the downlight LED light source, but the light efficiency of the downlight light source is not good, the light transmittance is low, and the light loss is too large. The other is to set sunburn or frosting on the lens, but the shielding effect on the downlight LED light source is limited.

[0003] Both of the above processing methods will reduce the light transmittance of the lens. Only part of the light can penetrate the lens, while the remaining light is scattered or absorbed to produce light loss, resulting in low light efficiency of the lens. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a high light efficiency lens, and the technical solution adopted includes:

[0005] A high light efficiency lens comprises a lens body, wherein the lens body has an incident surface and an exit surface, the lens body comprises a light-focusing area arranged in the middle thereof and a light-distributing area arranged around the light-focusing area, the incident surface of the light-focusing area is flat and smooth, the exit surface of the light-focusing area is convex and is provided with a Fresnel structure, the exit surface of the light-distributing area and the surface of the Fresnel structure are both provided with light-mixing microstructures, and the light-distributing area is provided with a plurality of concentric and continuously distributed annular convex patterns on the incident surface.

[0006] A technical solution adopted by an embodiment of the utility model to solve the technical problem is that the light-mixing microstructures on the exit surface of the light-homogenizing area and the surface of the Fresnel structure are Fermat spiral bead surfaces.

[0007] A technical solution adopted by an embodiment of the utility model to solve the technical problem is that the Fresnel structure, the light mixing microstructure, the annular convex pattern and the lens body are integrally formed.

[0008] Beneficial effects of the utility model:

[0009] The structural design of the incident surface and the output surface of the lens described in the present application ensures the light transmittance of the lens, so that the lens can achieve the requirements of high luminous efficiency on the basis of achieving primary energy efficiency or secondary energy efficiency, and realize that the internal electronic components, wires and other structures cannot be observed from the output surface side. It is suitable for aluminum substrates with different lamp bead arrangements, has a wide applicability, reduces the requirements for the arrangement of the aluminum substrate, and is conducive to reducing the procurement cost of the aluminum substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0011] Figure 1 A cross-sectional view of the high light efficiency lens described in this application;

[0012] Figure 2 This is a schematic structural diagram of the exit surface of the high light efficiency lens described in this application;

[0013] Figure 3 It is a schematic structural diagram of the incident surface of the high light efficiency lens described in this application. DETAILED DESCRIPTION

[0014] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0015] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0016] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0018] Reference Figures 1 to 3, an embodiment of the present application is proposed, in which the high light-efficiency lens described in this embodiment includes a lens body, wherein the lens body has an incident surface 10 and an exit surface 20, the lens body includes a light-focusing area 30 arranged in the middle thereof and a light-evening area 40 arranged around the light-focusing area 30, the incident surface 10 of the light-focusing area 30 is flat and smooth, the exit surface 20 of the light-focusing area 30 is convex and is provided with a Fresnel structure 50, the exit surface 20 of the light-evening area 40 and the surface of the Fresnel structure 50 are both provided with light-mixing microstructures 60, and the light-evening area 40 is provided with a plurality of concentric and continuously distributed annular convex patterns 70 on the incident surface 10.

[0019] The light emitted by the light source is irradiated on the focusing area 30 on the incident surface 10. Since the focusing area 30 is flat and smooth, the light irradiated on the focusing area 30 of the incident surface 10 can be fully utilized and irradiated on the Fresnel structure 50. The smoother the incident surface 10 is in the focusing area 30, the more conducive it is to improve the penetration of light in the focusing area 30, so that the light can be irradiated on the Fresnel structure 50 after passing through the incident surface of the focusing area 30 with almost no loss, thereby reducing the light loss irradiated to the focusing area 30 and increasing the light intensity irradiated on the Fresnel structure 50; the light from the exit surface 20 of the focusing area 30 is converged under the action of the Fresnel structure 50, so that the light emitted by the light source is converged to generate a larger light intensity, thereby improving the brightness of the focusing area 30 and ensuring the light transmission performance of the lens;

[0020] If the light-mixing microstructure is disposed on the incident surface 10 of the light-focusing area 30 instead of on the surface of the Fresnel structure 50 , the light-mixing microstructure on the incident surface 10 will cause the incident light to be reflected and lost, thereby affecting the amount of light irradiated to the Fresnel structure 50 and affecting the light effect;

[0021] In this embodiment, since the Fresnel structure 50 can not only make the light pass through the lens more evenly according to the design requirements, but also gather the light penetrating the focusing area 30 into the designed area, so that the light is fully utilized and shows high light transmittance, and the high light efficiency of the lens is achieved, a light mixing fine structure is also designed on the surface of the Fresnel structure 50 in this embodiment. The light mixing fine structure also has the function of amplifying the internal chip, reducing the visual transparency, so that the electronic components, wires and other structures inside the lamp cannot be clearly seen on the side of the exit surface 20;

[0022] If the Fresnel structure 50 is provided in the entire area of ​​the exit surface 20 and a light mixing fine structure is provided on the Fresnel structure 50, the electronic components, wires and other structures on the incident surface side of the light averaging area can still be observed on the exit surface 20 side. Therefore, in this embodiment, the Fresnel structure 50 is only designed in the middle of the exit surface 20, and the light mixing fine structure 60 and the annular convex pattern 70 are designed in the peripheral part of the lens body to prevent the electronic components, wires and other structures on the incident surface 10 side from being observed in the light averaging area of ​​the exit surface 20 due to the Fresnel structure.

[0023] In this embodiment, an annular convex pattern 70 is arranged on the incident surface 10 side of the light-homogenizing area 40, and a light-mixing microstructure 60 is arranged on the exit surface. The annular convex pattern 70 is a multi-layer optical arc structure with different arc angles through a non-spherical surface on the incident surface, which distributes the incident light in segments and zones to form different refraction angles. The entire exit surface 20 is differentiated by the light-mixing microstructure 60 to form different refraction angles. The light enters the incident surface 10 and then passes through the exit surface 20 to produce double refraction. The multiple refractions of the upper and lower layers and the segmented and zoned, differentiated light-emitting surfaces have the effect of making the light cross-mixed and evenly distributed, effectively increasing the brightness and uniformity of the light, enhancing the floodlight, achieving uniform transition inside the light spot, and ensuring the light effect. The interlaced optical paths also maximize the light mixing ability. When light enters from the exit surface 20, it generates one refraction when passing through the light-mixing microstructure 60 of the exit surface, and then penetrates into the lens body and is reflected back through the annular convex pattern 70 of the incident surface. Visually, the light incident from the exit surface passes through the incident surface and then is reflected back, so that the light source, electronics and cables at the bottom of the lens body cannot be seen by the human eye. Moreover, since the external light is reflected back, the lens body presents a shiny visual effect.

[0024] Therefore, the lens described in the present application utilizes the structural design of the incident surface 10 and the exit surface 20 to ensure the light transmittance of the lens, so that the lens can enable the lamp to achieve the first-level energy efficiency or the second-level energy efficiency, while meeting the requirements of high luminous efficiency, and achieving that the internal electronic components, wires and other structures cannot be observed from the exit surface side. It is suitable for aluminum substrates with different lamp bead arrangements, has a wide applicability, reduces the arrangement requirements for the aluminum substrate, and is beneficial to reducing the procurement cost of the aluminum substrate.

[0025] In this embodiment, the light-mixing microstructure 60 on the exit surface 20 of the light-homogenizing region 40 and the surface of the Fresnel structure 50 is a Fermat spiral bead surface, which has an excellent light-mixing and light-homogenizing effect, and the Fermat spiral bead surface can also form a glittering visual sense on the exit surface 20 of the lens body. In other embodiments, the light-mixing microstructure 60 can also adopt bead surface structures of other shapes, and bead surface structures of other shapes in combination with the annular convex pattern 70 can also form a glittering visual sense on the exit surface 20 of the lens body.

[0026] The Fresnel structure 50, the light mixing microstructure 60 and the annular convex pattern 70 are integrally formed with the lens body, which is convenient for manufacturing. In this embodiment, the incident surface 10 of the light focusing area 30 is a plane, and the light focusing area 30 forms a plano-convex lens, which effectively reduces light loss, so that light can be incident through the light focusing area 30 to achieve light refraction and focusing effects.

[0027] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A high light efficiency lens, characterized in that: The lens body comprises a lens body having an incident surface (10) and an exit surface (20), the lens body comprising a light-collecting region (30) arranged in the middle thereof and a light-averaging region (40) arranged around the light-collecting region (30), The incident surface (10) of the light-concentrating region (30) is flat and smooth, the exit surface (20) of the light-concentrating region (30) is convex and provided with a Fresnel structure (50), the exit surface (20) of the light-evening region (40) and the surface of the Fresnel structure (50) are both provided with light-mixing microstructures (60), and the light-evening region (40) is provided with a plurality of concentric and continuously distributed annular convex patterns (70) on the incident surface (10).

2. The high light efficiency lens according to claim 1, characterized in that: The light-mixing microstructure (60) on the exit surface (20) of the light-homogenizing region (40) and the surface of the Fresnel structure (50) is a Fermat spiral bead surface.

3. The high light efficiency lens according to claim 1, characterized in that: The Fresnel structure (50), the light-mixing microstructure (60), the annular convex pattern (70) and the lens body are integrally formed.

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