Lens extinction structure with gradually-changed small-opening module, vehicle lamp and vehicle

Abstract

The utility model relates to the technical field of vehicle lamps, and provides a small-opening module gradually-changing type lens extinction structure, a vehicle lamp and a vehicle, n multi-order sawtooth patterns with different designs are sequentially arranged on the side walls of the two sides of a lens in the direction from back to front respectively, each multi-order sawtooth pattern comprises a side wall light emitting surface YnXn-1 and a sawtooth surface XnYn which are sequentially connected from back to front, each sawtooth surface XnYn is provided with a plurality of side wall reflecting surfaces with gradually-changed inclination angles, and the inclination angles of the plurality of side wall reflecting surfaces are gradually increased from back to front. By adopting the multi-step sawtooth pattern structure, a single total reflection surface is designed into a plurality of different surfaces and is designed into the structure with the gradient inclination angle, so that the total reflection probability of light rays is increased, missing stray light is prevented from passing through the light-emitting surface of the lens, the stray light elimination efficiency is increased, the occupied space is small, and the lens is more attractive.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle lamps, and particularly to a lens light extinction structure with a small opening module and a gradient type, a vehicle lamp and a vehicle. Background Art

[0002] Due to the small size of the small opening module, it is inevitable that a strong light incident on the lens will be totally reflected by the lens side wall and form stray light that affects the uniformity. The traditional design method is to add leather texture or a single pattern to diffuse the light from the side wall by destroying the total reflection, but it is only suitable for the case of large openings with less stray light. As Figure 4 shown, the lens opening LH is 5 mm, the thickness LW is 10 mm, and the object distance FW is 30 mm. When the side wall is flat, at the side wall near the light incident surface, the incident light O1A 11 reaches the light incident surface of the lens, and after refraction, the light A 11 B 11 reaches the side wall. Through calculation, since the incident angle is approximately 87°, total reflection is bound to occur. The reflected light B 11 C 11 will pass through the light exit surface of the lens and thus form stray light. Similarly, at the side wall near the light exit surface, the incident light O1A 21 reaches the light incident surface of the lens, and after refraction, the light A 21 B 21 reaches the side wall. Since the incident angle is approximately 88°, total reflection is also bound to occur. The reflected light B 21 C 21 will pass through the light exit surface of the lens and thus form stray light. Because simply relying on the flat side wall with leather texture or a single pattern cannot completely destroy the total reflection system, and the small opening lens is bound to generate more stray light, the traditional design idea cannot meet the design requirements.

[0003] For small opening modules, especially those with an opening of less than 10 mm, and even more so those with an opening of less than 5 mm, the quantity and intensity of stray light will increase sharply. Therefore, solving the stray light problem of small opening modules has become a current technical problem. Summary of the Utility Model

[0004] Aiming at the defects in the prior art, the purpose of the present utility model is to provide a lens light extinction structure with a small opening module and a gradient type, a vehicle lamp and a vehicle.

[0005] According to the lens light extinction structure with a small opening module and a gradient type provided by the present utility model, n multi - stage sawtooth patterns with different designs are respectively arranged on the side walls on both sides of the lens in the direction from the rear to the front. Each of the multi - stage sawtooth patterns includes a side wall light exit surface Y n X n-1 connected in sequence in the direction from the rear to the front, and a sawtooth surface Xn Y n On each of the serrated surfaces X n Y n there are multiple sidewall reflecting surfaces with a gradually changing tilt angle design. Among them, in the direction from back to front, the tilt angles of the multiple sidewall reflecting surfaces gradually increase, so that all the light rays that enter through the lens light incident surface and pass through the serrated surface X n Y n are not transmitted through the lens light exit surface after reflection.

[0006] Preferably, the Y in the multi-stage serrated pattern n points are manifested as convex points on the sidewall of the lens, and the X n points are manifested as concave points on the sidewall of the lens. When n = 1, the X0 point is located on the lens light incident surface.

[0007] Preferably, the serrated surface X n Y n further includes a sidewall connection surface, and two adjacent sidewall reflecting surfaces are connected by the sidewall connection surface. Among them, the connection points of the sidewall reflecting surface and the sidewall connection surface form concave points.

[0008] Preferably, there is an exterior decoration and shielding part outside the sidewall of the lens to shield the diffused light.

[0009] Preferably, the multi-stage serrated patterns on the sidewalls on both sides of the lens are symmetrically arranged.

[0010] Preferably, it also has at least one of the following features:

[0011] The number of sidewall reflecting surfaces on different serrated surfaces X n Y n is different;

[0012] The tilt angles of the corresponding sidewall reflecting surfaces on different serrated surfaces X n Y n are different;

[0013] The lengths of different serrated surfaces X n Y n are different;

[0014] The lengths of the corresponding sidewall reflecting surfaces on different serrated surfaces X n Y n are different;

[0015] The lens is made of PC, PMMA or glass.

[0016] Preferably, the sidewall light exit surface Y n X n-1 is provided with a leather grain surface or a diffused pattern surface.

[0017] Preferably, the opening of the lens is less than 10 mm.

[0018] A vehicle lamp provided by the present utility model includes the lens light extinction structure with a gradually changing small opening module.

[0019] A vehicle including the vehicle lamp is provided by the present utility model.

[0020] Compared with the prior art, the present utility model has the following beneficial effects:

[0021] By adopting the structural design of multi-stage sawtooth patterns, the present utility model designs the single total reflection surface into multiple different surfaces. The inclination angle of the pattern closer to the light incident surface is smaller, the inclination angle of the pattern farther from the light incident surface of the lens is larger, and the inclination angle of the multi-stage sawtooth pattern in the middle gradually changes and transitions, increasing the total reflection probability of light, avoiding the leakage of stray light passing through the light exit surface of the lens, improving the controllability of light, increasing the efficiency of eliminating stray light. At the same time, the height of the multi-stage sawtooth pattern is also smaller than that of the single sawtooth pattern, so the space occupied is small and it is more beautiful. Description of the Drawings

[0022] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects and advantages of the present utility model will become more obvious:

[0023] Figure 1 It is a schematic structural diagram of a single multi-stage sawtooth pattern in the present utility model;

[0024] Figure 2 It is a diagram of the optical principle and difference comparison of the multi-stage sawtooth pattern. Among them, the left figure is a single sawtooth pattern surface, and the right figure is a sawtooth pattern surface with a gradually changing angle;

[0025] Figure 3 It is a schematic diagram of a gradually changing multi-stage sawtooth pattern lens;

[0026] Figure 4 It is a schematic diagram of the generation principle of stray light on the side wall of the lens plane;

[0027] Figure 5 It is a schematic diagram of the light extinction principle of the sawtooth side wall of the lens;

[0028] Figure 6 It is a schematic diagram of the light comparison of sawtooth patterns at different angles;

[0029] Figure 7 It is a schematic diagram of the comparison of different incident lights of a single multi-stage sawtooth pattern;

[0030] Figure 8 It is a schematic diagram of the variable structure of the light exit surface of a single sawtooth pattern. Detailed Embodiments

[0031] The present utility model will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several changes and improvements can still be made. These all belong to the protection scope of the present utility model.

[0032] Embodiment 1:

[0033] The present utility model provides a small-opening module gradient lens extinction structure. On the side walls on both sides of the lens, n multi-stage sawtooth patterns with different designs are arranged in sequence along the direction from back to front. Each of the multi-stage sawtooth patterns includes a side wall light-emitting surface Y n X n-1 and a sawtooth surface X n Y n connected in sequence in the direction from back to front. The Y n points in the multi-stage sawtooth pattern are manifested as convex points on the side wall of the lens, and the X n points are manifested as concave points on the side wall of the lens. When n = 1, the X0 point is located on the light-incident surface of the lens. Each of the sawtooth surfaces X n Y n has a plurality of side wall reflecting surfaces with a gradually changing inclination angle design. Among them, the inclination angles of the plurality of side wall reflecting surfaces gradually increase in the direction from back to front, so that all the light rays entering from the light-incident surface of the lens and passing through the sawtooth surface X n Y n are not transmitted through the light-emitting surface of the lens after reflection. It should be noted that the direction from back to front is defined as the direction from the light-incident surface of the lens to the light-emitting surface of the lens. The outer side surface of the lens side wall is blocked. The multi-stage sawtooth patterns on the side walls on both sides of the lens are preferably symmetrically arranged. The opening of the lens is below 10 mm, preferably less than 5 mm, such as sizes of 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0034] Specifically, the sawtooth surface X n Y n also includes a side wall connecting surface. Two adjacent side wall reflecting surfaces are connected by the side wall connecting surface. Among them, the connection point of the side wall reflecting surface and the side wall connecting surface forms a concave point.

[0035] According to a vehicle headlight provided by the present utility model, it includes the small-opening module gradient lens extinction structure described above.

[0036] According to a means of transportation provided by the present utility model, it includes a vehicle headlight.

[0037] Embodiment 2:

[0038] This embodiment is a preferred example of Embodiment 1. This embodiment provides a lens extinction structure with a gradually changing pattern for a small-aperture module, including n multi-stage sawtooth patterns with different designs. Each multi-stage sawtooth pattern includes a sawtooth surface X1Y1 and a sidewall light-emitting surface Y1X0. The angle of each sawtooth surface on X1Y1 is designed to be gradually changing, which can precisely control the total internal reflection of light. When the incident light O 13 O 23 、O 14 O 24 、O 15 O 25 is incident on the gradually changing sawtooth pattern on the sidewall, as Figure 2 shown, due to the different incident angles, the total internal reflection angles are also different. Therefore, each sawtooth angle α 11 、α 12 、α 13 on the sawtooth surface X1Y1 is designed to be different angles. If the designed angles gradually decrease, the incident light O 13 O 23 、O 14 O 24 、O 15 O 25 will be totally internally reflected into the light O 23 E 23 、O 24 E 24 、O 25 E 25 , and converge to the same target inside the lens. This controllable design is beneficial to the elimination of strong stray light. For the same incident light O 13 O 23 、O 14 O 24 、O 15 O 25 entering a single sawtooth pattern surface, due to the different incident angles, the reflection angles are also different, and the light will be scattered by the sawtooth surface X1Y′1, resulting in more uncontrollable stray light. In the present utility model, due to the gradually decreasing angles, the height of the gradually changing multi-stage sawtooth pattern is also smaller than that of a single sawtooth pattern. Therefore, it occupies less space and is more beautiful. The incident light angle farther from the light incident surface of the lens is bound to be larger than that closer to the light incident surface of the lens. Therefore, the pattern angle closer to the light incident surface of the lens is smaller, and the pattern angle farther from the light incident surface of the lens is larger. The angles of the intermediate multi-stage sawtooth patterns gradually change and transition, increasing the probability of total internal reflection of light and avoiding any stray light passing through the light-emitting surface of the lens being missed.

[0039] In practical applications, the number of sidewall reflection surfaces on the sawtooth surface of each multi-stage sawtooth pattern can be designed to be the same or different. Different sawtooth surfaces X n Y nThe inclination angles of the corresponding sidewall reflection surfaces on the upper part can be designed to be the same or different. Different serrated surfaces X n Y n The lengths can be designed to be the same or different. Different serrated surfaces X n Y n The lengths of the corresponding sidewall reflection surfaces on the upper part can be designed to be the same or different. According to the intensity distribution of light, the size of each multi-stage serrated pattern is adjustable. According to the different lens thicknesses, the angle gradient trend of the middle multi-stage serrated pattern is different. The light-emitting surface Y1X0 of the sidewall of each multi-stage serrated pattern can be a leather grain surface or a diffused pattern surface, which improves the light diffusion ability and greatly reduces stray light. According to the different functions achieved by the lens, the angle gradient trend of the middle multi-stage serrated pattern is different. Among them, the material of the lens can be polycarbonate (i.e., PC) or polymethyl methacrylate (i.e., PMMA) or glass. By adopting a structural design with variable multiple parameters, the number and angle of the serrated surfaces on each multi-stage serrated pattern can be adjusted, which can gradually increase, gradually decrease, or change randomly, providing more ideas and directions for the design and having good versatility.

[0040] Specifically, by designing the plane sidewall into a serrated pattern to control the total reflection angle of light so that it reaches the ideal position for stray light elimination. As Figure 5 shown, at the sidewall near the light incident surface of the lens, after adding the serrated pattern, the refracted light A 12 B 12 can be totally reflected to the inside of the light-emitting surface of the sidewall on the other side of the lens. The light B 12 C 12 can be refracted or totally reflected again through the serrated pattern on the lower side of the lens and finally diffused out from the sidewall and blocked by the module exterior trim parts. Similarly, at the sidewall far from the light incident surface of the lens, after adding the serrated pattern, the refracted light A 22 B 22 can be totally reflected to the inside of the light-emitting surface of the sidewall on the other side of the lens. The light B 22 C 22 can be refracted or totally reflected again through the serrated pattern on the lower side of the lens. As Figure 8 shown, finally, it diffuses out from the sidewall and is blocked by the module exterior trim parts. Solving stray light by controlling and changing the total reflection angle is more efficient and more targeted.

[0041] As Figure 6 shown, for light with the same incident angle, after passing through sidewall reflection surfaces with different inclination angles, the total reflection angles are also different. The inclination angles of the sidewall reflection surfaces α 11 、α 12 、α 13Gradually increasing, the total internal reflection angles θ′1, θ′2, and θ′3 of the light rays gradually decrease, and the light rays show a tendency to deflect inward. Therefore, in order to make all the light rays passing through the side wall deflect into the lens and not exit from the light-emitting surface of the lens, it is necessary to design the inclination angles of the side wall reflection surfaces at different positions. At the side wall close to the light-incident surface of the lens, the angle can be designed to be smaller, and at the side wall far from the light-incident surface of the lens, the angle needs to be designed to be larger. As Figure 3 shown, the gradient multi-stage serrated pattern can meet this design requirement and is beneficial to the elimination of stray light. The patterns 1 - pattern n can be specially designed with different sizes and angles according to the regions with different intensities of stray light.

[0042] As Figure 7 shown, within the serrated pattern at the same angle and at the same total internal reflection position, the light ray passing through point X1 has the largest incident angle. In the figure, O 21 and O 22 are the same point. The light ray O 11 O 21 is totally internally reflected by the side wall reflection surface X2Y2 to O 21 D 21 , and the light ray O 12 O 22 is totally internally reflected by the side wall reflection surface X2Y2 to O 22 D 22 . Due to the smaller total internal reflection angle, the light ray O 22 D 22 is more deflected inward. Therefore, the analysis of each total internal reflection light ray on the side wall reflection surface only needs to study the light ray passing through point X1.

[0043] The design principle of the multi-stage serrated pattern is as Figure 1 and Figure 2 shown. Each serration angle α 11 , α 12 , α 13 on the serrated surface X1Y1 is designed to have different angles. If the designed angles gradually decrease, the incident light rays O 13 O 23 , O 14 O 24 , O 15 O 25 will be totally internally reflected into the light rays O 13 E 23 , O 24 E 24 , O 25 E 25 , and converge to the same target inside the lens. This controllable design is beneficial to the elimination of strong stray light. The same incident light rays O 13 O 23 , O 14 O 24 , O15 O 25 When entering a single serrated pattern surface, due to different incident angles, the reflection angles are also different, and the light will be scattered by the serrated surface X1Y′1, resulting in more uncontrollable stray light. Due to the gradually decreasing angle, the height of the gradient multi-step serrated pattern is also smaller than that of the single serrated pattern. Therefore, it occupies less space and is more beautiful. As Figure 3 shown, the incident light angles farther from the light incident surface of the lens are bound to be larger than those closer to the light incident surface of the lens. Therefore, the inclination angle of the side wall reflection surface closer to the light incident surface of the lens is smaller, the inclination angle of the side wall reflection surface farther from the light incident surface of the lens is larger, and the angles of the middle side wall reflection surfaces gradually change and transition, increasing the total internal reflection probability of the light and avoiding any stray light passing through the light exit surface. The gradient lens extinction structure design of the small opening module of the present invention can control stray light more efficiently and then eliminate it specifically. At the same time, the structural size occupies less space than the traditional pattern, so it is more beautiful.

[0044] More specifically, the material of the lens can be selected as PMMA, with a refractive index of 1.493 and a minimum total internal reflection angle of 42.1°. For a lens system with an opening of 5 mm, a thickness of 10 mm, and an object distance of 30 mm, the inclination angle α 11 of the side wall reflection surface at the side wall closer to the light incident surface of the lens is at least 20.3°, and the inclination angle α n1 of the side wall reflection surface at the side wall farther from the light incident surface of the lens is at least 20.5°. Since the thickness of the lens is small, the angle difference is not large. Therefore, in the design, there is no need to consider the thickness factor for the gradient design of the multi-step serrated pattern, and only the inclination angles of the side wall reflection surfaces on each multi-step serrated pattern need to be designed.

[0045] In this embodiment, the light source of the vehicle lamp is set as a surface-mounted LED. The surface-mounted LED is integrated on the PCBA or integrated on the radiator and is connected to the PCB board through metal wires. In other embodiments, other light source types can be selected according to actual needs.

[0046] The present invention can be configured to generate multiple light distributions. The types between the multiple light distributions are different, and the type of each light distribution is any one of the following: low beam illumination, high beam illumination, adaptive low beam illumination, ADB high beam illumination, corner fog lamp illumination, urban road mode illumination, rural road mode illumination, highway mode illumination, bend mode illumination, rain and fog mode illumination, position signal lamp, turn signal lamp, daytime running lamp, welcome lamp, and ambient lamp.

[0047] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0048] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. A gradient lens extinction structure for a small opening module, characterized in that, On the side walls on both sides of the lens, n multi-stage sawtooth patterns with different designs are arranged in sequence in the direction from the rear to the front. Each of the multi-stage sawtooth patterns includes a side wall light-emitting surface Y that is sequentially connected in the direction from the rear to the front n X n-1 , a sawtooth surface X n Y n , and each of the sawtooth surfaces X n Y n has a plurality of side wall reflecting surfaces with a gradually changing inclination angle. Among them, in the direction from the rear to the front, the inclination angles of the plurality of side wall reflecting surfaces gradually increase, so that all the light rays that enter from the light incident surface of the lens and pass through the sawtooth surface X n Y n are reflected and do not pass through the light-emitting surface of the lens.

2. The gradient lens extinction structure of the small opening module according to claim 1, wherein The Y in the multi-stage sawtooth pattern n points are convex points on the side wall of the lens, and the X n points are concave points on the side wall of the lens. When n = 1, the X0 point is located on the light incident surface of the lens.

3. The gradient lens extinction structure of the small opening module according to claim 1, characterized in that, The serrated surface X n Y n It further includes a side wall connection surface, and two adjacent side wall reflection surfaces are connected through the side wall connection surface. Among them, the connection points of the side wall reflection surface and the side wall connection surface form concave points.

4. The lens extinction structure with a gradient in the small opening module according to claim 1, characterized in that The exterior of the lens sidewall has a decorative shielding part to shield the diffused light.

5. The lens extinction structure with a gradient change for a small opening module according to claim 1, characterized in that, The multi-stage serrated patterns on the sidewalls on both sides of the lens are symmetrically arranged.

6. The lens extinction structure with gradual change of the small opening module according to claim 1, characterized in that, It also has at least one of the following features: Different serrated surfaces X n Y n have different numbers of sidewall reflecting surfaces; Different serrated surfaces X n Y n The inclination angles of the corresponding side wall reflecting surfaces thereon are different; Different serrated surfaces X n Y n have different lengths; Different serrated surfaces X n Y n The lengths of the corresponding sidewall reflecting surfaces are different; The lens is made of PC, PMMA or glass.

7. The gradient lens extinction structure of the small opening module according to claim 1, wherein The sidewall light-emitting surface Y n X n-1 is provided with a leather grain surface or a diffused pattern surface.

8. The gradient lens extinction structure of the small opening module according to claim 1, characterized in that, The opening of the lens is less than 10 mm.

9. A vehicle lamp, characterized in that, It includes the small-aperture module gradient lens extinction structure according to any one of claims 1 to 8.

10. A vehicle, characterized in that, It includes the vehicle lamp according to claim 9.

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