A lens that evenly distributes light

Abstract

The present invention provides a lens that evenly distributes light. The cross section of the lens includes a light incident surface, a light guiding surface, a light emitting surface, and an end surface. The light emitting surface is the front of the lens, the light guiding surface is the back of the lens, and the light incident surface and the end surface are respectively located at two ends of the lens; the light incident surface is an inclined surface, the light guiding surface is a total reflection surface, and the light emitting surface is a semi-conductive and semi-light emitting surface with a surface treated with corroded leather grains. Preferably, the lens is a gyroscope or a symmetrical stretching body of the cross section about the vertical axis, and the light incident surface constitutes the light entrance of the light source. The design of light refracting through the light incident surface, total reflection through the light guiding surface, and semi-conductive and semi-light emitting through the light emitting surface makes the light more uniform, without graininess, and without glare after passing through the lens. Moreover, the lens has a simple and compact structure, which is conducive to production and large-scale application, especially for occasions with limited space, such as automobiles, etc., the effect is very good, and it has practical application value and promotion value.

Description

Technical Field

[0001] The invention relates to a lens for evenly distributing light. Background Art

[0002] As a conventional device, electro-optical lighting fixtures have been widely used by human society. With the continuous development of science and technology, especially in recent years, the light source technology has been greatly improved and broken through. As a relatively new light source, LED light source has the advantages of small size, high energy efficiency, long life, and high cost performance, which has enabled it to develop rapidly and be widely used in various fields. As an important invention in the development of human society, automobiles have also widely used LED light sources in light source applications. Although LED light sources have superior performance, they also have some shortcomings (such as strong granularity when emitting light, uneven and dazzling light in a large direction, etc.) that need to be improved in the later secondary optical design.

[0003] Although there are many uniform surface-emitting light sources on the market, their relatively large size is not conducive to the optical secondary design of multi-light source lamps, and their cost is relatively high, especially for automotive lamps, where the application space is limited, which is not conducive to large-scale application and promotion. Summary of the invention

[0004] In order to solve the problems of strong granularity, uneven light emission in a large direction, and glare when emitting light, the present application provides a lens with a compact structure, anti-glare, simple structure, and uniform light distribution. The specific implementation method is as follows:

[0005] A lens that evenly distributes light, the cross section of the lens comprising a light incident surface, a light guiding surface, a light emitting surface, and an end surface, the light emitting surface being the front side of the lens, the light guiding surface being the back side of the lens, the light incident surface and the end surface being located at two ends of the lens respectively; the light incident surface being an inclined surface, the light guiding surface being a total reflection surface, and the light emitting surface being a semi-conductive and semi-light emitting surface with a surface treated with corroded leather graining.

[0006] In one or more embodiments of the present invention, the lens is a body of revolution or a symmetrically stretched body with respect to the vertical axis of the cross section, and the light incident surface constitutes a light entrance of the light source.

[0007] In one or more embodiments of the present invention, the light incident surface is a complete or segmented plane or arc surface.

[0008] In one or more embodiments of the present invention, the light guiding surface is a complete or segmented plane or arc surface.

[0009] In one or more embodiments of the present invention, the light guiding surface and the light emitting surface are complete arc surfaces, and the angle between the line connecting the center points of the two arc surfaces and the vertical axis of the cross section is 120° to 140°.

[0010] In one or more embodiments of the present invention, the angle is 130°.

[0011] In one or more embodiments of the present invention, an optical pattern is provided on the light incident surface and / or the light guiding surface.

[0012] In one or more embodiments of the present invention, the end surface is a total reflection surface.

[0013] In one or more embodiments of the present invention, a light guiding groove is disposed on the light entrance, and the light enters the light incident surface from the light guiding groove.

[0014] The beneficial implementation effect brought by the present invention is that the light is refracted by the light incident surface, fully reflected by the light guiding surface, and half-transmitted and half-exited by the light exit surface, so that the light passing through the lens is more uniform, without graininess and glare. Moreover, the lens structure is simple and compact, which is conducive to production and mass application, especially for occasions with limited space, such as automobiles, etc., the effect is very good, and it has practical application value and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a lens for evenly distributing light disclosed in the present invention;

[0016] Figure 2 This is a schematic diagram of the light transmission principle of the lens of the present invention;

[0017] Figure 3 is a cross-sectional view of a lens structure disclosed in the present invention;

[0018] Figure 4 This is another lens structure diagram disclosed by the present invention. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. Figure 1-4 , wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0020] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present invention, but is only provided for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.

[0021] The "connection" described in the specification and the mutual "connection" relationship of the components shown in the drawings can be understood as a fixed connection or a detachable connection or an integral connection; it can be a direct connection or a connection through an intermediate medium. Ordinary technicians in this field can understand the connection relationship according to the specific circumstances and can derive different implementation methods in an appropriate manner such as screwing, riveting, welding, clamping or embedding.

[0022] With respect to the directional words such as up, down, left, right, top, bottom, etc. described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" may mean directly above or obliquely above, or it simply means higher than other objects; other directions may be understood by analogy.

[0023] The mechanical processing technology used for parts with solid shapes may be stamping, forging, casting, wire cutting, laser cutting, casting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precisions, but are not limited to the above-mentioned materials and manufacturing processes.

[0024] A lens that evenly distributes light, wherein the cross section 1 of the lens (such as Figure 1 ) includes a light incident surface 11, a light guiding surface 12, a light emitting surface 13, and an end surface 14. The light emitting surface 13 is the front of the lens, the light guiding surface 12 is the back of the lens, and the light incident surface 11 and the end surface 14 are located at both ends of the lens respectively; the light incident surface 11 is an inclined surface, the light guiding surface 12 is a total reflection surface, and the light emitting surface 13 is a semi-conductive and semi-light emitting surface with a surface treated with corroded leather grain. When the light is refracted into different angles by the light incident surface 11 and enters the interior of the lens (such as Figure 2 ), the light-guiding surface 12 totally reflects the light to improve the utilization rate of the light source. The light-emitting surface 13 is designed to be semi-transmitting and semi-emitting, which has two important functions: the first is to refract the light in the lens into irregular directions, and then evenly emit the light-emitting surface 13, so that the lens can maintain a relatively uniform state when viewed from different angles; the second is to totally reflect part of the light into the interior of the lens, so that the light is transmitted again toward the end face 14 of the lens. The light can be reflected multiple times, which can make the light on the lens more uniform; the end face 14 mainly provides a mounting and fixing structure for the lens. The end face 14 can be designed as a totally reflecting surface to totally reflect part of the light into the interior of the lens, which can make the light on the lens more uniform while improving the utilization rate of the light source. The end face 14 can also be designed as a component that participates in light transmission, and the desired effect can be achieved through angle design. Furthermore, the lens is a gyroscope 2 (such as the cross section 1) of the cross section 1 about the vertical axis. Figure 3 ) or symmetrical stretch body 3 (such as Figure 4 ), the light incident surface 11 forms the light entrance 15 of the light source. The two lens structures are simple and symmetrical, and the processing is simpler, the production efficiency is high, and the consistency is good. Optical patterns such as corn patterns, stripes, pyramid patterns, Vcut patterns, etc. can be added to the light incident surface 11 and the light guide surface 12 to make the light more uniform.

[0025] The light incident surface 11 and the light guiding surface 12 can be designed to be flat or curved, depending on the design requirements and lighting effects. In situations where a large area of ​​light source is required, such as outdoor display lights, the light incident surface 11 and the light guiding surface 12 can be divided into segments and then combined into a whole. This segmentation method is particularly suitable for application scenarios with large light sources. The segmented design can also adjust the angle according to design requirements, and is flexible and diverse to use. When the required light source area is small, such as interior decorative lights, the light incident surface 11 and the light guiding surface 12 are designed as a whole, which is convenient to produce, simple in process, and lower in cost.

[0026] It has been verified through experiments that when the light guide surface 12 and the light emitting surface 13 are designed as complete arc surfaces, a better uniform light emission effect can be achieved when the angle between the line connecting the center points of the two arc surfaces and the vertical axis of the cross section 1 is 120° to 140°. Preferably, when the angle is around 130°, the uniform light emission effect is the best. When the light guide surface 12 and the light emitting surface 13 are other shapes, the design of the angle can also be used as a reference for optimization.

[0027] In order to increase the utilization rate of the light source, a light guide groove (not shown) is provided on the light entrance 15, and the light enters the light entrance surface 11 from the light guide groove, so that the light can be conducted along the direction of the light guide groove, thereby improving the utilization rate of the light source.

[0028] The material of the lens in this application is not limited to colorless and transparent materials such as PC, PMMA, PS, etc., and the lens can be used as a single unit, or it can be formed into various combinations, arrays, squares, circles, anisotropy and other shapes, which can be freely combined according to lighting effects, design requirements, etc.

[0029] The lens of this design is particularly effective for point light sources (such as LED light sources, small-sized surface light sources, laser point light sources), and has a wide range of applications, such as outdoor lighting, street lighting, indoor lighting, automotive interior lighting, signal lamps, etc., and has practical application value and promotion value.

[0030] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A lens for evenly distributing light, characterized in that: The cross section of the lens includes a light incident surface, a light guiding surface, a light emitting surface, and an end surface. The light emitting surface is the front surface of the lens, the light guiding surface is the back surface of the lens, and the light incident surface and the end surface are respectively located at two ends of the lens; the light incident surface is an inclined surface, the light guiding surface is a total reflection surface, and the light emitting surface is a semi-conductive and semi-light emitting surface with a surface treated with corroded leather grain; The light guiding surface and the light emitting surface are complete arc surfaces, the angle between the line connecting the center points of the two arc surfaces and the vertical axis of the cross section is 120° to 140°, and the end surface is a total reflection surface.

2. The lens for uniformly distributing light according to claim 1, characterized in that: The lens is a body of revolution or a symmetrically stretched body of the cross section about the vertical axis, and the light incident surface constitutes a light entrance of the light source, and the light incident surface is a complete or segmented plane or arc surface.

3. The lens for uniformly distributing light according to claim 1, characterized in that: The angle is 130°.

4. The lens for uniformly distributing light according to any one of claims 1 to 3, characterized in that: The light incident surface and / or the light guiding surface are provided with optical patterns.

5. The lens for uniformly distributing light according to claim 2, characterized in that: The light entrance is provided with a light guiding groove, and the light enters the light entrance surface from the light guiding groove.

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