Lens with microstructure

Abstract

A lens with microstructures comprises a first refraction area and a second refraction area, the first refraction area is provided with a first light-emitting surface, the second refraction area is provided with a second light-emitting surface, the first light-emitting surface and the second light-emitting surface adopt different structural designs, the first light-emitting surface is provided with a plurality of first microstructures, and the second light-emitting surface is provided with a plurality of second microstructures. The plurality of first microstructures are arranged in a matrix on the first light-emitting surface, each first microstructure is provided with a first micro-surface, and the first micro-surface is a plane, a concave surface or a convex surface with a curvature radius different from that of the first light-emitting surface. On the premise of ensuring that the light pattern has the obvious cut-off line, the light color of the first refraction area is fully mixed, the edge of the light pattern is more fuzzy, and the edge of the light pattern has no obvious yellow light, so that long-time driving is more comfortable, fatigue of long-distance driving is avoided, the obvious cut-off line can prevent the eyes of a driver of an opposite coming vehicle from being directly irradiated during normal driving, and the driving safety is improved. And driving at night is safer.

Description

Technical Field

[0001] The utility model belongs to the field of vehicle lamp lenses, and particularly relates to a lens with microstructures. Background Art

[0002] In the field of two-wheeler vehicle lamp lenses, the commonly used lens for current vehicle lamps is a collimating lens with a smooth surface and made of acrylic. Due to the phenomenon of light dispersion, when this lens is in use, a yellow light phenomenon often appears at the edge part of the light pattern. Especially in the first refraction area of the collimating lens. As Figure 1 shown, for the existing vehicle lamp lens, the surface of the vehicle lamp lens is smooth, most of the light rays emit from the first refraction area 31 of the lens 3 and form the edge part of the light pattern. The first light ray emitted from the light-emitting surface of the lamp bead 5 passes through the lens 3 and emits from the first arc surface 301 located in the first refraction area 31 of the lens 3. After being refracted by the lens 3, the first light ray refracts into three colors: red, green, and blue. Here, red and green lights are mixed to form yellow light, and it does not mix with other light colors, resulting in a yellow light appearance at the edge of the light pattern. The visual effect presented by this phenomenon gives the driver a poor driving experience.

[0003] The utility model patent with the domestic patent publication number "CN217519786U" and the patent name "An Optical Lens and a Vehicle Lamp" discloses a lens structure. Although this design can make the light more uniform, the contour of its edge becomes relatively blurred and there is no obvious cut-off line. For the low beam, if there is an oncoming vehicle, the vehicle lamp will be more dazzling after being turned on. Summary of the Utility Model

[0004] Aiming at the above-mentioned prior art, the purpose of the utility model is to provide a lens with microstructures, which can improve the yellow light phenomenon at the edge of the light pattern and ensure that the light pattern has an obvious cut-off line.

[0005] The technical solution of the utility model is realized as follows: A lens with microstructures includes a first refraction area and a second refraction area. The first refraction area is provided with a first light-emitting surface, and the second refraction area is provided with a second light-emitting surface. The first light-emitting surface and the second light-emitting surface adopt different structural designs. The first light-emitting surface is provided with a plurality of first microstructures, and the plurality of first microstructures are arranged in a matrix on the first light-emitting surface. The first microstructure is provided with a first micro-surface, and the first micro-surface is a plane, a concave surface, or a convex surface with a curvature radius different from that of the first light-emitting surface.

[0006] The beneficial effects of such a design are as follows: The second refraction area can form an obvious light pattern cut-off line. The first micro-surface being planar and concave can diverge light compared to a convex surface. If the first micro-surface is convex, it has a certain diverging effect when the curvature radius is less than that of the first light-emitting surface, and can form focused light when the curvature radius is much larger than that of the first light-emitting surface. After passing through the focal point, diverging light can be formed. The diverging light can be fully mixed with the light refracted by the adjacent first micro-surfaces, enabling the light colors in the first refraction area to be fully mixed while ensuring that the light pattern has an obvious cut-off line, making the edge of the light pattern more blurred and there being no obvious yellow light at the edge of the light pattern. This makes driving more comfortable for a long time, avoids fatigue during long-distance driving, and the obvious cut-off line can prevent direct light from shining into the eyes of oncoming drivers during normal driving, making night driving safer.

[0007] Further, a third refraction area is provided between the first refraction area and the second refraction area. The third refraction area is provided with a third light-emitting surface, and the third light-emitting surface is provided with a third micro-structure. The lateral dimension of the third micro-structure is larger than that of the first micro-structure. The third micro-structure can serve as a transitional structure and can be used to blur the light and dark cut-off line to make it not too sharp. A too sharp cut-off line shining on the road surface will cause interference to the driver.

[0008] Further, the projection or actual edge contour of the first micro-surface on the light-incident surface is a square with the same length and width, so that the light spot formed by the cross-section perpendicular to the light irradiation direction directly in front of the lens is more uniform.

[0009] Further, the projection or actual edge contour of the third micro-structure on the light-incident surface is a pentagon. The shape requirements for the transition area are relatively small, and it can achieve the transition function.

[0010] Further, the projection or actual edge contour of the third micro-structure on the light-incident surface is a rhombus.

[0011] Further, the projection or actual edge contour of the third micro-structure on the light-incident surface is an inclined rectangle.

[0012] Further, the projection or actual edge contour of the third micro-structure on the light-incident surface is a trapezoid.

[0013] Further, the projection or actual edge contour of the third micro-structure on the light-incident surface is a rectangle.

[0014] Further, the first micro-surface is convex. The curvature radius of the convex surface in the first cross-section is R, and the curvature radius of the first light-emitting surface in the first cross-section is R1, satisfying [R1÷(RI + 1)]>R>[R1÷(RI + 5)]. Such a curvature radius can make the light pattern more uniform at a distance of more than 10 meters, and no yellow light area will be generated at the edge position.

[0015] Further, the second light-emitting surface is formed by splicing a plurality of arc surfaces with different curvature radii and greater than the curvature radius of the second light-emitting surface in the horizontal direction, or by splicing a plurality of concave arc surfaces, so that the entire light spot is more uniform. Description of the Drawings

[0016] Figure 1 FIG. 6 is a schematic diagram of light dispersion of an existing vehicle headlight structure;

[0017] Figure 2 FIG. 7 is a schematic diagram of the light irradiation path of an existing vehicle headlight structure;

[0018] Figure 3 FIG. 8 is a schematic diagram of the light irradiation path of an embodiment of a lens with a microstructure according to the present invention;

[0019] Figure 4 FIG. 9 is a front view of a lens with a microstructure according to the present invention;

[0020] Figure 5 FIG. 10 is a front view of the lens of Example 2;

[0021] Figure 6 FIG. 11 is a schematic diagram of the light irradiation path of Example 3. Detailed Embodiments

[0022] As needed, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only illustrative of the present invention, and the present invention can be implemented in different and alternative forms. The drawings are not necessarily drawn to scale, and some features may be exaggerated or reduced to show details of specific components. Therefore, the specific structures and functional details disclosed herein should not be construed as limiting, but only as a representative basis for teaching those skilled in the art to implement the present invention differently. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0023] As Figure 1 and Figure 2 shown, a vehicle headlight structure includes a circuit board 1, a lamp bead 5, a light-shielding bracket 2, a lens 3, and a condenser lens 4. The lamp bead 5 is fixed on the circuit board 1. The light emitted by the lamp bead 5 forms light with a smaller divergence angle after being refracted by the condenser lens 4, and then forms nearly parallel light after being refracted by the lens 3. Since it undergoes multiple refractions, light dispersion is likely to occur. As Figure 1 shown, any light ray will undergo light dispersion. For clarity of expression, the refraction angle is exaggerated so that the light separation is more obvious. The three arrows respectively represent red light, green light, and blue light. As Figure 2As shown, multiple light rays are emitted in an approximately parallel direction after passing through the lens 3. Although the actual paths of light sources of different colors are different, the differences are small, and they are basically in an approximately parallel state when emitted from the lens 3.

[0024] As Figure 3 , Figure 4 and Figure 5 shown, a lens 3 with a microstructure includes a first refraction region 31 and a second refraction region 32. The first refraction region 31 is provided with a first light-emitting surface 301, and the second refraction region 32 is provided with a second light-emitting surface 302. The first light-emitting surface 301 and the second light-emitting surface 302 can be arc-shaped curved surfaces. The first light-emitting surface 301 and the second light-emitting surface 302 adopt different structural designs. The first light-emitting surface 301 is provided with a plurality of first microstructures 304. The plurality of first microstructures 304 are arranged in a matrix on the first light-emitting surface 301. The first microstructure 304 is provided with a first micro-surface, and the first micro-surface is a plane, a concave surface, or a convex surface with a curvature radius different from that of the first light-emitting surface 301.

[0025] Example 1:

[0026] As Figure 3 and Figure 4 shown, the first micro-surface is a plane, a concave surface, or a convex surface with a curvature radius greater than that of the first light-emitting surface 301. The second light-emitting surface 302 is formed by splicing a plurality of arc-shaped surfaces with different curvature radii and greater than the curvature radius of the second light-emitting surface 302 in the transverse direction or by splicing a plurality of concave arc-shaped surfaces.

[0027] Example 2:

[0028] As Figure 3 and Figure 5 shown, a third refraction region 39 is provided between the first refraction region 31 and the second refraction region 32. The third refraction region 39 is provided with a third light-emitting surface, and the third light-emitting surface is provided with a third microstructure 38. The transverse dimension of the third microstructure 38 is greater than the transverse dimension of the first microstructure 304.

[0029] As Figure 3 and Figure 5 shown, the projection or actual edge contour of the first micro-surface on the light-incident surface 303 is a square with the same length and width.

[0030] As Figure 3 and Figure 5 shown, the projection or actual edge contour of the third microstructure 38 on the light-incident surface 303 is a pentagon 34 and / or a rhombus 33 and / or an inclined rectangle 38 and / or a trapezoid 39 and / or a rectangle 37, which can be a single shape or a combination of multiple shapes.

[0031] Example 3:

[0032] As Figure 6As shown, the first micro-surface is a convex surface, which can be a spherical surface or other aspherical curved surfaces. The radius of curvature of the convex surface in the first cross-section is R, which is equivalent to a small convex lens and can form converging light in a relatively close area and then disperse it. The schematic diagram is shown in an exaggerated way. The actual light is close to a parallel state and the illumination distance is relatively far. The radius of curvature of the first light-emitting surface 301 in the first cross-section is R1, satisfying [R1÷(RI + 1)]>R>[R1÷(RI + 5)]. In this way, a uniform light spot can be formed at a distance of more than 10 meters. If it is used as a low beam, the radius of curvature can be further increased, for example, reducing the radius of curvature to [R1÷(RI + 0.3)]>R>[R1÷(RI + 2)]. The first cross-section can be a cross-section at any position of the first light-emitting surface 301, which can avoid forming dot matrix light and affecting the line of sight.

Claims

1. A lens with microstructures, characterized in that: It includes a first refraction region (31) and a second refraction region (32). The first refraction region (31) is provided with a first light-emitting surface (301), and the second refraction region (32) is provided with a second light-emitting surface (302). The first light-emitting surface (301) is provided with a plurality of first microstructures (304). The plurality of first microstructures (304) are arranged in a matrix on the first light-emitting surface (301). The first microstructure (304) is provided with a first micro-surface, and the first micro-surface is a plane, a concave surface, or a convex surface with a curvature radius different from that of the first light-emitting surface (301).

2. The lens with microstructure according to claim 1, wherein: A third refraction region (39) is provided between the first refraction region (31) and the second refraction region (32). The third refraction region (39) is provided with a third light-emitting surface, and the third light-emitting surface is provided with a third microstructure (38). The lateral dimension of the third microstructure (38) is larger than the lateral dimension of the first microstructure (304).

3. The lens with microstructure according to claim 2, wherein: The projection or actual edge contour of the third microstructure (38) on the light-incident surface (303) is a rectangle.

4. The lens with microstructures according to claim 2, wherein: The projection or actual edge contour of the third microstructure (38) on the light-incident surface (303) is a pentagon.

5. The lens with microstructures according to claim 2, characterized in that: The projection or actual edge contour of the third microstructure (38) on the light-incident surface (303) is a rhombus.

6. The lens with microstructure according to claim 2, wherein: The projection or actual edge contour of the third microstructure (38) on the light-incident surface (303) is an inclined rectangle.

7. The lens with microstructures according to claim 2, wherein: The projection or actual edge contour of the third microstructure (38) on the light-incident surface (303) is a trapezoid.

8. The lens with microstructures according to any one of claims 1-7, characterized in that: The projection or actual edge contour of the first micro-surface on the light-incident surface (303) is a square with the same length and width.

9. The lens with microstructures according to claim 1, wherein: The first micro-surface is a convex surface. The curvature radius of the convex surface in the first cross-section is R, and the curvature radius of the first light-emitting surface (301) in the first cross-section is R1, satisfying [R1÷(RI + 1)] > R > [R1÷(RI + 5)].

10. The lens with microstructure according to claim 1, wherein: The second light-emitting surface (302) is laterally formed by splicing a plurality of arc surfaces with different curvature radii and larger than the curvature radius of the second light-emitting surface (302) or by splicing a plurality of concave arc surfaces.

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