Automobile headlamp lens structure and lens module

Abstract

The invention relates to the technical field of automobile headlamp lenses, in particular to an automobile headlamp lens structure and a lens module, comprising a lens, the surface of the lens is provided with an optical pattern structure, the optical pattern structure is arranged in the middle area of the surface of the lens, and lines of the optical pattern structure intersect with each other to form a plurality of densely distributed pattern units. The pattern units are used for reducing the sharpness of light rays, weakening and improving the color emission and color diffusion phenomena of headlamp light, and reducing the sharpness of the light rays and weakening and improving the color emission and color diffusion phenomena of the headlamp light; the pattern units are arranged to be of a rhombus structure, and the side length of each rhombus pattern unit is small. Through the arrangement of the optical pattern structure, light rays are uniformly distributed, so that light beams projected from the lens are more uniformly distributed on a light curtain wall or a road surface, and the dispersion phenomenon at a light and shade cut-off line caused by non-uniform light ray distribution is reduced. And meanwhile, the uniform light distribution can also improve the overall lighting effect of the headlamp, so that the road surface lighting is more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive headlight lenses, and in particular to an automotive headlight lens structure and a lens module. Background Art

[0002] When the automotive headlight lens module is lit, the light and dark cut-off line projected on the light curtain wall or the road surface shows an obvious chromatic dispersion phenomenon. This is because the light emitted by the light source is reflected by the reflector onto the transparent lens and then shines on the road surface. Since the lens has a certain curvature and inconsistent thickness itself, the light generates a physical phenomenon of light scattering when passing through the lens, which affects the appearance and road illumination effect.

[0003] Currently, each vehicle manufacturer usually solves such problems by changing the material of the lens itself. For example, it is replaced with glass or PMMA material. These materials have a relatively high light transmittance, and the probability of light refraction or scattering during the transmission process inside the material is small. However, these materials either cause the cost to increase or the weight to increase, and higher requirements are imposed on the installation reliability of the headlight. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an automotive headlight lens structure and a lens module, which reduce the light sharpness through the pattern unit and weaken and improve the chromatic dispersion phenomenon of the headlight light.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In a first aspect, an automotive headlight lens structure is characterized in that it includes a lens, and a first optical pattern structure is provided on the surface of the lens. The first optical pattern structure is arranged in the middle area of the lens surface. The lines of the first optical pattern structure intersect with each other to form a number of densely distributed first pattern units, which reduce the light sharpness through the first pattern units and weaken and improve the chromatic dispersion phenomenon of the headlight light.

[0007] As a further implementation method, the first optical pattern structure is arranged in the strong light area in the middle of the outer surface of the lens.

[0008] As a further implementation method, both sides of the first optical pattern structure extend to the position of the light and dark cut-off line at the boundary between the strong light area and the weak light area.

[0009] As a further implementation method, the top and bottom of the first optical pattern structure are correspondingly flush with the top edge and the bottom edge of the lens, and the outward extension direction of the first optical pattern structure is perpendicular to the transparent surface.

[0010] As a further implementation, the first pattern units formed by the intersecting lines of the first optical pattern structure are in a diamond structure, the side length of a single diamond pattern unit is 0.5 - 1 mm, and the first optical pattern structure protrudes from the lens surface by 0.8 - 1.2 mm.

[0011] As a further implementation, in the first pattern units formed in the strong light area, the sizes of the first pattern units extending from the center position to the surrounding directions gradually increase, and the first pattern units are in a quadrilateral structure.

[0012] As a further implementation, it further includes a second optical pattern structure, the second optical pattern structure is arranged in the weak light area on the outer surface of the lens, and the lines of the first optical pattern structure and the second optical pattern structure intersect correspondingly to form a plurality of first pattern units and second pattern units, and the pattern units are in a quadrilateral structure.

[0013] As a further implementation, the second optical pattern structure and the first optical pattern structure form an integrated pattern structure. The integrated pattern structure includes several vertical patterns and horizontal patterns, forming a plurality of first pattern units and second pattern units. The spacing of the vertical patterns gradually increases from the middle to both sides. The horizontal patterns include a first horizontal pattern, which is a straight line structure, and also include a second horizontal pattern and a third horizontal pattern in a V shape on both sides of the first horizontal pattern, so that the sizes of the formed quadrilateral pattern units gradually increase from the middle to the surrounding.

[0014] In a second aspect, a lens module includes an automotive headlight lens structure as described in any one of the above.

[0015] As a further implementation, it further includes an upper cover plate, a bracket and a base. A lens is fixed between the front ends of the upper cover plate and the bracket, the rear ends of the upper cover plate and the bracket are fixed on the base, and a light source board and a reflector are further arranged on the front side of the base.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention provides an optical pattern structure on the surface of the lens, and the optical pattern structure is arranged in the middle area of ​​the lens surface. The patterns of the optical pattern structure intersect with each other to form a number of dense pattern units. The pattern units reduce the sharpness of the light, and weaken and improve the color dispersion phenomenon of the headlight light; the pattern unit is set to a diamond structure or a quadrilateral structure, so that the light is evenly distributed on the lens surface, avoiding the light being too concentrated in the strong light area and relatively weak in the weak light area. By evenly distributing the light, the light beam projected from the lens can be more evenly distributed on the light curtain wall or the road surface, reducing the dispersion phenomenon at the light cutoff line caused by uneven light distribution. At the same time, the uniform light distribution can also improve the overall lighting effect of the headlight, make the road lighting more uniform, and improve driving safety. When the size of the pattern unit is set to a gradient form, the light output effect of the entire lens light output surface can be more consistent, and the dispersion phenomenon at the light cutoff line can be alleviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 is a schematic diagram of a pattern structure provided on a lens structure in an embodiment of the present invention;

[0020] Figure 2 This is a front view of the lens module in an embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of a lens module in an embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of a pattern structure in an embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the principle of a lens module in an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the pattern structure in an embodiment of the present invention.

[0025] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0026] Wherein: 1-base, 2-upper cover, 3-lens, 4-bracket, 5-baffle, 6-light source board, 7-reflector, 8-screw, 9-bolt; 31. first optical pattern structure, 32. strong light area, 33. weak light area, 34. light and dark cut-off line; 61. light; 101. vertical pattern, 102. first horizontal pattern, 103. second horizontal pattern, 104. third horizontal pattern. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0028] Embodiment 1

[0029] In a typical implementation manner of the present invention, with reference to Figures 1-5 as shown, an automotive headlight lens structure includes a lens 3, and a first optical pattern structure 31 is provided on the surface of the lens 3. The first optical pattern structure 31 is arranged in the middle area of the surface of the lens 3. The lines of the first optical pattern structure 31 intersect with each other to form a number of densely distributed first pattern units, and the light sharpness is reduced through the first pattern units to weaken and improve the color dispersion phenomenon of the headlight light.

[0030] As Figure 1 and Figure 2 shown, the first optical pattern structure 31 of this embodiment is arranged in the strong light area in the middle of the outer surface of the lens.

[0031] Since most of the light passes through the middle area and less light passes through the two sides with relatively weak light intensity, the light-emitting area of the lens is divided into a strong light area 32 in the middle and a weak light area 33 on both sides of the strong light area.

[0032] The color dispersion phenomenon in the weak light area with relatively weak light intensity is not very obvious, the color dispersion phenomenon in the strong light area is more serious, and the dispersion phenomenon is relatively obvious at the light and dark cut-off line 34 at the junction of the strong light area and the weak light area on both sides of the strong light area. Therefore, the first optical pattern structure 31 is completely arranged at the position of the entire strong light area, and both sides of the optical pattern structure 31 extend to the position of the light and dark cut-off line 34 at the boundary between the strong light area 32 and the weak light area 33.

[0033] By arranging the optical pattern structure 31 at the position of the strong light area 32 of the lens 3, the light sharpness can be reduced, thereby weakening and improving the color dispersion phenomenon of the headlight light and enhancing the road illumination effect of the light.

[0034] As Figure 2 shown, the top and bottom of the first optical pattern structure 31 are correspondingly flush with the top edge and bottom edge of the lens 3, so that the light emitted from the strong light area 32 can all pass through the first optical pattern structure 31 to weaken the dispersion phenomenon.

[0035] As Figure 4As shown, the grid-shaped first pattern units formed by the intersecting lines of the first optical pattern structure 31 have a rhombic structure. The side length of a single rhombic pattern unit is 0.5 - 1 mm. In this embodiment, the side length of a single rhombic pattern unit is preferably 0.7 mm. The size and arrangement of each actual pattern are adaptively adjusted according to optical simulation. All the patterns are arranged along the lens curved surface shape, which is beneficial to maximizing the utilization of the light reflected by the optical surface, enhancing the illuminance of the lamp optics, and optimizing the road illumination effect of the lamp.

[0036] The side length of a single rhombic pattern unit is relatively small, being 0.7 mm, which enables the light to be evenly distributed on the lens surface, avoiding the light being overly concentrated in the strong light area and relatively weak in the weak light area. By evenly distributing the light, the distribution of the light beam projected from the lens 3 on the light curtain wall or the road surface can be made more uniform, reducing the chromatic dispersion phenomenon at the light and dark cut-off line 34 caused by uneven light distribution. At the same time, the uniform light 61 distribution can also improve the overall lighting effect of the headlamp, making the road surface lighting more uniform and enhancing driving safety.

[0037] The first optical pattern structure 31 protrudes from the lens surface by 0.8 - 1.2 mm, preferably 1 mm. The outward extension direction of the optical pattern structure 31 is perpendicular to the transparent surface. This can make the scattering degree of light with different wavelengths in the lens more consistent. Since the chromatic dispersion and color phenomenon are usually caused by different scattering degrees of light with different wavelengths in the lens, by reducing this scattering difference, the chromatic dispersion phenomenon can be effectively improved.

[0038] In the lens module, the light 61 emitted by the light source board 6 is reflected by the reflector 7 onto the transparent lens 3. Due to the inconsistent thickness of the lens itself, the physical phenomenon of light scattering occurs when the light passes through the lens. This phenomenon is more obvious at the light and dark cut-off line 34 between the strong light area and the weak light area. Setting the first optical pattern structure 31 can redirect the light that might be scattered due to lens defects or unreasonable design back into the useful optical path, improving the light utilization rate. This can not only increase the brightness of the headlamp but also reduce the chromatic dispersion phenomenon caused by light loss.

[0039] In this embodiment, by adding small rhombic-structured optical patterns on the arc-shaped outer surface of the lens, the sharpness of the light is reduced, thereby weakening and improving the chromatic dispersion and color phenomenon of the headlamp light, enhancing the road illumination effect of the light. By setting the strong light area through the optical pattern, the problem of severe chromatic dispersion and color at the light and dark cut-off line is also improved.

[0040] It is more optimal to set the first optical pattern structure 31 in the area with stronger light intensity in the middle of the lens to weaken the chromatic dispersion phenomenon. This is because the weak light areas 33 on both sides of the strong light area 32 are too far outside, so less light passes through and the light intensity is weak, and the chromatic dispersion phenomenon is not obvious. Therefore, it can be considered not to arrange optical patterns to weaken it.

[0041] The light emitted by the light source of the lens module is irradiated onto the front lens 3 through a reflector. After diffused refraction by the diamond-shaped pattern, the sharpness of the light projected onto the ground is reduced, improving the problem of color dispersion in the light and dark cut-off line of the lamp.

[0042] The light distribution pattern structure can also adopt several other pattern shapes, such as corn kernel pattern, semi-cylindrical pattern, strip pattern, sawtooth pattern, etc. Their optical performances are different, and they also have different degrees of weakening effects on the dispersion of light. In this embodiment, the diamond-shaped optical pattern scheme with relatively better optimization effect is preferably selected for design to meet the appearance and optical performance requirements of the product.

[0043] The first optical pattern structure 31 of this embodiment is arranged in the strong light area 32 and can scatter and refract light, thereby reducing the sharpness of the light. When light passes through the lens, the optical pattern structure will disperse the originally concentrated and intense light into a softer and more uniform light beam. This dispersion effect regulates the intensity and direction of the light to a certain extent when the light passes through the lens, reducing the dispersion phenomenon caused by overly concentrated light.

[0044] Since each first pattern unit formed by the intersection and extension of the first optical pattern structure 31 is a diamond structure, relying on these pattern units to change the propagation path of light makes the propagation path of light on the light-emitting surface of the lens more complex. This complex light path can effectively break the regular scattering that may be caused by uneven lens curvature and thickness, making the projected light more uniform and reducing the color dispersion phenomenon.

[0045] In addition, the first optical pattern structure 31 can make the colored halos generated by dispersion less obvious visually, or disperse the colored halos into smaller and less noticeable light spots, thereby improving the appearance quality of the headlamp.

[0046] In a preferred example, for the multiple first pattern units arranged in the strong light area 32, the sizes of the first pattern units extending from the central position to the surrounding directions increase in sequence. This is because the most light passes through the center of the strong light area and the light sharpness is the highest, while the light distributed towards the edge of the lens gradually decreases. Therefore, in the optical pattern structure, the sizes of the pattern units from the center to the surrounding increase in sequence, showing a gradient arrangement. This gradient arrangement of the optical pattern structure can effectively cope with the non-uniformity of the light distribution in the strong light area, optimizing the light processing effect to the greatest extent and making the light illumination effect emitted from the lens more uniform.

[0047] It can be understood that when the sizes of the multiple first pattern units arranged in the strong light area 32 are in a gradient, the first pattern units are irregular quadrilateral structures.

[0048] The optical pattern structure 31 of this embodiment is applicable to the automotive headlight lens that needs to improve the optical efficiency on the basis of maintaining the light guide uniformity, and is particularly applicable to the scenarios with specific requirements for the light emission angle.

[0049] Embodiment 2

[0050] The difference between this embodiment and Embodiment 1 is that it further includes a second optical pattern structure. The second optical pattern structure is arranged in the weak light areas on both sides of the strong light area on the outer surface of the lens. The patterns of the first optical pattern structure 31 and the second optical pattern structure cross each other correspondingly to form a plurality of first pattern units and second pattern units, and the pattern units are quadrilateral structures.

[0051] As Figure 6 shown, the second optical pattern structure and the first optical pattern structure 31 form an integrated pattern structure. The integrated pattern structure includes a plurality of vertical patterns 101 and horizontal patterns, forming a plurality of first pattern units and second pattern units.

[0052] A plurality of vertical patterns 101 are arranged side by side in the vertical direction on the transparent outer surface. From the middle vertical pattern 101 to the vertical patterns 101 on both sides, the distance between adjacent vertical patterns 101 increases in turn.

[0053] The horizontal pattern includes a first horizontal pattern 102, which is a straight line structure. The first horizontal pattern 102 is arranged in the middle position of all horizontal patterns, as Figure 6 shown.

[0054] It further includes second horizontal patterns 103 and third horizontal patterns 104 in a V shape on both sides of the first horizontal pattern 102. The horizontal and vertical patterns form a plurality of first pattern units and second pattern units, where the first pattern units are located in the strong light area and the second pattern units are located in the weak light area.

[0055] The pattern units formed by the horizontal and vertical patterns are quadrilateral structures, as Figure 6 shown. The second horizontal pattern 103 on the upper side of the first horizontal pattern 102 is arranged in a V shape, and the third horizontal pattern 104 on the lower side of the first horizontal pattern 102 is arranged in an inverted V shape. And from the direction of the first horizontal pattern 102 upward and downward, the distance between the horizontal patterns increases in turn, so that the sizes of the formed first pattern units and second pattern units gradually increase from the middle to the periphery.

[0056] By arranging the gradient pattern units on the entire light-emitting surface of the lens, and the sizes of the pattern units gradually increase from the middle to the periphery, this gradient arrangement of the optical pattern structure can effectively cope with the non-uniformity of the light distribution within the light-emitting surface of the lens, optimize the light processing effect to the greatest extent, make the light illumination effect emitted from the lens more uniform, and make the light-emitting effects of the strong light area and the weak light area more consistent.

[0057] In other examples, the shape of the first pattern unit in the high-light area is a rhombus, and the second pattern unit in the low-light area is a quadrilateral.

[0058] Embodiment III

[0059] In a typical implementation manner of the present invention, referring to Figures 1-5 As shown, a lens module includes an automotive headlight lens structure as described in Embodiment I. The lens module further includes a base 1, an upper cover plate 2, a bracket 4, a baffle 5, a light source board 6, a reflector 7, screws 8, and bolts 9.

[0060] First, the light source LED is welded to the light source board 6 through a special process. The light source board 6 and the reflector 7 are first accurately positioned by two cylindrical positioning pins, and then fastened together by 3 screws 8 to ensure the relative position of the light source and the reflector is accurate, so that the light reflection path meets the design requirements. Then, the whole is connected and fixed to the metal base 1 through 6 bolts 9.

[0061] To prevent the heat accumulation of the LED during operation from causing too high a temperature and affecting the light efficiency of the LED, the metal base 1 mainly functions as heat dissipation. The rear end of the lower bracket 4 of the lens module is connected to the base 1 through 4 screws 8. The rear end of the upper cover plate 2 of the lens module is connected to the base 1 through 4 screws 8. The lens 3 is fixed between the front ends of the lower bracket 4 and the upper cover plate 2 through a clamping structure, restricting its X and Y directions. Then, the lower bracket 4 and the upper cover plate are tightly connected through 4 bolts 9, and at the same time, the lens 13 is clamped and fixed in the Z direction to realize the installation and fixation of the lens 13.

[0062] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vehicle headlight lens structure, characterized in that: It includes a lens, and a first optical pattern structure is provided on the surface of the lens. The first optical pattern structure is arranged in the middle area of ​​the lens surface. The patterns of the first optical pattern structure intersect with each other to form a plurality of densely distributed first pattern units. The first pattern units reduce the sharpness of the light and weaken and improve the color dispersion phenomenon of the headlight light.

2. The vehicle headlight lens structure according to claim 1, characterized in that: The first optical pattern structure is arranged in the strong light area in the middle of the outer surface of the lens.

3. The vehicle headlight lens structure according to claim 2, characterized in that: Both sides of the first optical pattern structure extend to the position of the light-dark cut-off line at the boundary between the strong light area and the weak light area.

4. The automobile headlight lens structure according to claim 1, characterized in that: The top and bottom of the first optical pattern structure are flush with the top and bottom edges of the lens respectively, and the outward extension direction of the first optical pattern structure is perpendicular to the transparent surface.

5. The automobile headlight lens structure according to claim 1, characterized in that: The first pattern unit formed by the intersection of the patterns of the first optical pattern structure is a diamond structure, the side length of a single diamond pattern unit is 0.5-1 mm, and the first optical pattern structure protrudes from the lens surface by 0.8-1.2 mm.

6. The automobile headlight lens structure according to claim 3, characterized in that: In the first pattern units formed in the strong light area, the sizes of the first pattern units extending from the center position to the surrounding directions gradually increase, and the first pattern units are quadrilateral structures.

7. The automobile headlight lens structure according to claim 3, characterized in that: It also includes a second optical pattern structure, which is arranged in a weak light area on the outer surface of the lens. The patterns of the first optical pattern structure and the second optical pattern structure cross each other to form a plurality of first pattern units and second pattern units, and the pattern units are quadrilateral structures.

8. The automobile headlight lens structure according to claim 7, characterized in that: The second optical pattern structure and the first optical pattern structure form an integrated pattern structure, which includes a plurality of vertical patterns and transverse patterns to form a plurality of first pattern units and second pattern units. The spacing of the vertical patterns gradually increases from the middle to both sides. The transverse patterns include a first transverse pattern, which is a straight line structure, and also include a second transverse pattern and a third transverse pattern that are V-shaped on the upper and lower sides of the first transverse pattern, so that the size of the pattern unit of the quadrilateral structure formed gradually increases from the middle to the surrounding areas.

9. A lens module, characterized in that: It comprises an automobile headlight lens structure as described in any one of claims 1-8.

10. The lens module according to claim 9, characterized in that: It also includes an upper cover plate, a bracket and a base. A lens is fixed between the upper cover plate and the front end of the bracket. The upper cover plate and the rear end of the bracket are fixed on the base. A light source plate and a reflector are also provided on the front side of the base.

Images