Optical element, illumination module and vehicle lamp
By using a reflector cutoff line structure and adjusting the light pattern in the headlight module, the problem of uneven transition between illuminated and unilluminated areas was solved, resulting in a smooth transition between light and dark, improving the driver's obstacle recognition ability and the aesthetics of the light pattern.
Patent Information
- Application Number
- CN202520291206.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The uneven transition between the illuminated and unilluminated areas of the existing headlight module results in an overly sharp boundary between light and dark, affecting the driver's ability to recognize obstacles.
Several reflectors are used, each with a cutoff line structure at its root to form a sub-cutoff line. The sub-cutoff lines have a height difference in the vertical direction, and the light pattern is adjusted by light reduction and correction structures to ensure a smooth transition between light and dark.
It achieves a smooth transition between illuminated and unilluminated areas, reduces the glare effect of the light-dark boundary line on the driver, and improves obstacle recognition capabilities and the aesthetics of the road surface lighting pattern.
Smart Images
Figure CN223579740U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile lighting, specifically relates to an optical element. In addition, it also relates to a lighting module and a vehicle lamp. BACKGROUND
[0002] The vehicle lamp module refers to a device or unit that can realize one or several vehicle lighting functions after being used alone or after being combined.
[0003] The cut-off line structure arranged in the vehicle lamp module is a special design for preventing the light of the vehicle lamp module from diverging in the direction above the horizontal line, so as to reduce the dazzling of the driver or the pedestrian in the low beam lighting, and to ensure the traffic safety.
[0004] In the prior art, the design of the high beam and low beam module using LEDs mainly includes two types, namely the transmission type and the reflection type module. When the cut-off line structure is designed, the two types of modules usually adopt one of the following two schemes: a reflector plate or a light shield plate with a cut-off line structure, or a baffle with a cut-off line structure shape arranged on the heat sink. Of course, there is also a scheme of cutting a cut-off line structure at the root of the reflector. However, this scheme often makes the cut-off line of the light pattern obtained too sharp, especially the transition between the illuminated area and the non-illuminated area in the driver's view is poor, and there is an obvious boundary, which affects the driver's obstacle recognition ability at the boundary position.
[0005] Therefore, how to make the illuminated area and the non-illuminated area transition uniformly is a technical problem to be solved by the person skilled in the art. CONTENT OF THE UTILITY MODEL
[0006] The utility model solves the problem of lack of transition between the illuminated area and the non-illuminated area.
[0007] In order to achieve the above-mentioned purpose, the utility model provides an optical element in the first aspect, which comprises a plurality of reflectors, and the root of each reflector is provided with a cut-off line structure; the light reflected by each reflector is cut off by the corresponding cut-off line structure to form a sub-cut-off line, and each sub-cut-off line has a height difference in the vertical direction.
[0008] Preferably, the cut-off line structure comprises a cut-off line forming part, the cut-off line forming part is a broken line structure composed of a first edge and at least one second edge, the first edge extends along the horizontal direction or the approximate horizontal direction, each first edge is arranged in a staggered manner in the vertical direction, one end of the second edge is connected with one end of the first edge, and the other end of the second edge extends downward in the direction away from the first edge.
[0009] Preferably, a certain reference cutoff line structure is taken as a reference, and a horizontal line where the first edge of the reference cutoff line structure is located is a horizontal reference line, and the farther the first edge is from the horizontal reference line, the greater the height difference between the first edge and the horizontal reference line.
[0010] Preferably, a light reduction structure is arranged on the first edge to reduce the light intensity of the upper part of the light pattern formed by the optical element.
[0011] Preferably, the light reduction structure includes a semicircular hole and / or a semispherical boss.
[0012] Preferably, the light reduction structures on the first edges are located at different positions so that the light pattern regions corresponding to adjacent light reduction structures partially overlap.
[0013] Preferably, part of the cutoff line structure further includes a correction structure, and a correction structure is further arranged on the cutoff line structure to correct the virtual focus region on the light pattern formed by the optical element via the correction structure.
[0014] Preferably, the correction structure includes a wedge-shaped correction notch and / or an arc-shaped correction notch, the wedge-shaped correction notch is formed with an inclined edge extending upward in the horizontal direction, and the arc-shaped correction notch is formed with an arc-shaped edge protruding upward.
[0015] Preferably, the inclination angles of the inclined edges on different mirrors are different, and the arc lengths and curvatures of the arc-shaped edges on different mirrors are different.
[0016] According to the above technical solution, the optical element is composed of a plurality of mirrors, the root of each mirror is provided with a cutoff line structure, and the cutoff line structure of each mirror is adapted to form a sub-cutoff line on the light pattern formed by projection, and the sub-cutoff lines are collectively formed as the bright-dark cutoff line of the light pattern. The height difference of each cutoff line structure in the vertical direction makes it possible to form a plurality of sub-cutoff lines at the bright-dark cutoff line region of the light pattern formed by the optical element, so that the bright-dark transition of the light pattern at the bright-dark cutoff line region is soft, and there is not only one obvious bright-dark boundary line, that is, the transition between the illuminated area and the unilluminated area is good, so as to reduce the possibility that the obstacle recognition ability of the driver is affected by the existence of the bright-dark boundary line, and also to improve the aesthetic degree of the road surface light pattern.
[0017] The second aspect of the utility model provides a lighting module, including line board being equipped with light source, light emitting element, radiator and any one of optical element in above technical scheme, line board and optical element all are connected with radiator, light emitting element is located on the light path of the light reflected by optical element light source.
[0018] By the above technical solution, since the optical module provided by the second aspect of the utility model has the optical element of any one of the above technical solutions, the same technical effects as the above optical element are brought.
[0019] The utility model discloses a third aspect provides a car lamp, including the optical module of the above technical solution.
[0020] By the above technical solution, since the car lamp provided by the third aspect of the utility model has the optical module of the above technical solution, the same technical effects as the above optical module are brought. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the structural schematic diagram of optical element of the utility model;
[0022] Figure 2 It is the structural schematic diagram of one specific embodiment of optical element in the utility model;
[0023] Figure 3 It is the whole light pattern diagram of one specific embodiment of optical element in the utility model;
[0024] Figure 4 It is the light pattern diagram corresponding to 0 reflector in the utility model;
[0025] Figure 5 It is the light pattern diagram corresponding to R1 reflector in the utility model;
[0026] Figure 6 It is the light pattern diagram corresponding to R2 reflector in the utility model;
[0027] Figure 7 It is the light pattern diagram corresponding to L1 reflector in the utility model;
[0028] Figure 8 It is the light pattern diagram corresponding to L2 reflector in the utility model;
[0029] Figure 9 It is the structural schematic diagram of optical module in the utility model.
[0030] BRIEF DESCRIPTION OF DRAWINGS
[0031] 1, optical element;11, reflector;2, cutoff line structure;21, cutoff line forming portion;211, first edge;212, second edge;22, correction structure;22a, wedge-shaped correction notch;22b, arc-shaped correction notch;3, light reduction structure;4, light emitting element;5, radiator. DETAILED DESCRIPTION
[0032] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this utility model. The protection scope of this utility model is not limited to the specific embodiments described below, and the orientations "front", "rear", "left", "right", "up" and "down" described below are all established with the vehicle itself as a reference after the optical module is installed on the vehicle.
[0033] This utility model provides an optical element 1, such as Figures 1 to 9 As shown, it includes a plurality of reflectors 11, which together form the optical element 1. The plurality of reflectors 11 can be assembled into the optical element 1, or they can be integrally formed into the optical element 1. The reflectors 11 are preferably ellipsoidal or parabolic reflectors, so as to form a primary light pattern through the reflectors 11.
[0034] like Figure 1 As shown, each reflector 11 has a cutoff line structure 2 at its root. The cutoff line structure 2 is adapted to ensure that the final light pattern has a bright and dark cutoff line. Specifically, as shown... Figure 2 As shown, the cutoff line structure includes a cutoff line forming part 21, which is a broken line structure composed of a first edge 211 and at least one second edge 212. The first edge 211 extends in a horizontal or approximately horizontal direction, and each first edge 211 is staggered in the vertical direction. One end of the second edge 212 is connected to one end of the first edge 211, and the other end of the second edge 212 extends downward in a direction away from the first edge 211. The included angle between the second edge 212 and the first edge 211 is an obtuse angle.
[0035] Based on the above technical solution, in use, the light reflected by each reflector 11 is cut off by the corresponding cutoff line structure 2 to form a sub-light pattern with sub-cutoff lines. Since each first edge 211 is staggered in the vertical direction, there is a height difference in the sub-cutoff lines in the vertical direction. Thus, a cutoff line with a transition between light and dark is formed by multiple sub-cutoff lines. Compared with the cutoff line setting of conventional technology, the cutoff line with a transition between light and dark will not have an overly sharp cutoff line, which will cause glare and affect the driver's observation. This can ensure the driver's ability to identify obstacles at the light and dark boundary and reduce the visual effect of obstacles suddenly entering the bright area from the dark area. Even if the obstacle gradually appears, it can ensure the driver's normal judgment.
[0036] by Figure 1 and Figure 2Taking the optical element 1 composed of five reflectors 11 as an example, from right to left they are labeled as R2 reflector, R1 reflector, O reflector, L1 reflector, and L2 reflector (the direction of the projected light pattern exiting is considered to be directly forward). The cutoff line structure 2 on the O reflector is taken as the reference cutoff line structure. The further away from the O reflector, the lower the height of the cutoff line structure 2 on the reflector 11. That is, the horizontal line where the first edge 211 of the cutoff line structure 2 on the O reflector is located is taken as the horizontal reference line. The height of the first edge 211 of the cutoff line structure 2 on the R2 reflector relative to the first edge 211 of the cutoff line structure 2 on the R1 reflector relative to the horizontal reference line is... The height difference is greater. Similarly, the first edge 211 of the cutoff line structure 2 on the L2 mirror has a greater height difference from the horizontal reference line than the first edge 211 of the cutoff line structure 2 on the L1 mirror. This makes the cutoff line forming part 21 on each mirror 11 project sub-cutoff lines in the bright and dark cutoff line areas of the light pattern in sequence. This can make multiple sub-cutoff lines in the bright and dark cutoff line areas to ensure that the light pattern has a smooth transition between light and dark at the edge of the bright and dark cutoff line areas. It can also be convenient to adjust the brightness, position and angle of the bright and dark cutoff lines by adjusting the cutoff line structure 2 corresponding to different sub-cutoff lines to improve the effect of the bright and dark cutoff lines.
[0037] To ensure the safety of the light pattern projected by optical element 1 during application, such as Figure 1 and Figure 2 As shown, with the driving perspective as the reference viewpoint, when applied to a left-hand drive vehicle, the cutoff line structure 2 presents a "low on the left and high on the right" zigzag shape. At this time, the light pattern projected by the optical element 1 has its right side of the cutoff line below the 0° line of the H-axis on the light distribution screen. Figure 3 The horizontal dashed line (which is horizontal in the reference view) is used in the optical element 1. The left side of the cutoff line is above the 0° line of the H-axis on the light distribution screen. When applied to right-hand drive vehicles, the cutoff line structure 2 presents a "left-high, right-low" zigzag shape. In this case, the left side of the cutoff line is below the 0° line of the H-axis on the light distribution screen, while the right side is above the 0° line. This ensures the optical efficiency of the optical element 1 while preventing glare from affecting the driver. It should be noted that the light distribution screen refers to a vertical screen located 25 meters in front of the vehicle, and the H-axis refers to the horizontal coordinate axis on the light distribution screen.
[0038] like Figure 2As shown, the light-reducing structure 3 is arranged on the first edge 211 to reduce the light intensity of the upper part of the light pattern formed by the optical element 1. The light-reducing structure 3 can be arranged at any position along the length direction of the first edge 211, i.e. the light-reducing structure 3 can be arranged at any position along the length direction of the first edge 211, which can change the light intensity of the corresponding area of the light pattern. Preferably, the light-reducing structure 3 should be arranged to cover the measurement point area where the light intensity needs to be reduced, i.e. the light-reducing structure 3 should be arranged at the position corresponding to the measurement point area where the light intensity needs to be reduced, wherein the measurement point area is the 50L measurement point area as defined in the regulations. In addition to the height difference between the first edges 211, the relative positions of the light-reducing structures 3 in the horizontal direction of the first edge 211 can also be arranged in a staggered manner, i.e. the relative positions of adjacent light-reducing structures 3 in the horizontal direction of the first edge 211 relative to the corresponding mirror 11 are different, so that the light pattern areas corresponding to adjacent light-reducing structures 3 partially overlap. In addition, the light-reducing structures 3 on each cutoff line structure 2 can adjust the light intensity of different positions of the bright-dark cutoff line area in the light pattern, so that the bright-dark transition of the obtained light pattern is relatively smooth, thereby reducing the occurrence of obvious bright-dark boundary lines. The light-reducing structure 3 can be a semicircular hole, and the semicircular hole-shaped light-reducing structure 3 is arranged on the first edge 211 of the mirror 11. The aperture size of the semicircular hole can be changed to adjust the intensity of the light intensity of the area affected by the light-reducing structure 3 and the size of the corresponding light pattern area.
[0039] The light-reducing structure 3 can also be a semispherical boss, and the semispherical boss-shaped light-reducing structure 3 can also be arranged at any position along the length direction of the first edge 211. The semispherical boss-shaped light-reducing structure 3 can also reduce the light intensity of part of the light pattern, and compared with the semicircular hole-shaped light-reducing structure 3, the semispherical boss-shaped light-reducing structure 3 has a smaller fillet at the junction with the reflecting surface of the mirror 11, which can reduce the reduction of the light reflecting ability of the mirror 11 caused by the arrangement of the light-reducing structure 3, and has a lower design difficulty and a smaller impact on the appearance of the optical element 1. Both types of light-reducing structures 3 can uniformly reduce the light intensity of part of the light pattern without causing abrupt changes. In addition, the light-reducing structure 3 can be arranged on the second edge 212 of the mirror 11 to reduce the light intensity of the lower part of the light pattern formed by the optical element 1. Figure 3The light pattern diagram (the intersection of the vertical line marked in the diagram and the light-dark cutoff line is the measuring point where the light intensity needs to be reduced, corresponding to -1.5°, -2.5°, and -3.5° on the V-axis from left to right) shows that setting the light-reducing structure 3 can reduce the light intensity in some areas while minimizing changes to the structure of the reflector 11, thereby reducing the impact on the horizontality of the light-dark cutoff line (horizontality is the vertical position deviation value of the maximum gradient point at different locations). Both light-reducing structures 3 can uniformly reduce the light intensity. The semi-circular aperture can rapidly reduce the light intensity in a region, but the edges are prone to abrupt changes; the hemispherical protrusion reduces the light intensity less, but the edges are more uniform. The appropriate structure should be selected based on the specific application. The V-axis refers to the vertical coordinate axis on the light distribution screen.
[0040] like Figures 4 to 8 As shown, a correction structure 22 is also provided on the cutoff line structure 2. The correction structure 22 can be set at the root of any reflector 11, such as... Figure 2 As shown, the correction structure 22 can be a wedge-shaped correction notch 22a, where an inclined edge extending upward in the horizontal direction is formed at the wedge-shaped correction notch 22a. Figure 7 The image shown is a light pattern diagram corresponding to the L1 reflector with a wedge-shaped correction notch 22a as the correction structure 22. It can also be an arc-shaped correction notch 22b, where an upwardly convex arc-shaped edge is formed. Figure 8 The image shown is the light pattern corresponding to the L2 reflector with an arc-shaped correction notch 22b as a correction structure 22. By setting the correction structure 22, the defocused area on the light pattern formed after being projected by the optical element 1 can be effectively corrected.
[0041] Different types of correction structures 22 can be used, such as arc-shaped correction notches 22b with different curvatures or wedge-shaped correction notches 22a with different tilt angles, to correct the distortion of the light pattern to different degrees. That is, correction structures 22 are set on different mirrors 11. The tilt angle of the tilted edge on different mirrors 11 can be different, and the arc length and curvature of the arc-shaped edge on different mirrors 11 can also be different. For example, the R2 mirror, R1 mirror and L1 mirror are provided with wedge-shaped correction notches with different tilt angles of the tilted edge, while the L2 mirror is provided with an arc-shaped correction notch. By setting appropriate correction structures 22 on different mirrors 11, the light pattern projected by the optical element 1 can be corrected more effectively.
[0042] In summary, the optical element 1 has the following advantages: the optical element 1 is composed of a plurality of mirrors 11 arranged in a horizontal direction, each mirror 11 is provided with a cutoff line structure 2, and the cutoff line structure 2 of each mirror 11 is adapted to form a sub-cutoff line on the light pattern, and the sub-cutoff line has a height difference in the vertical direction, so that a cutoff line with clear and dark transition changes is formed by a plurality of sub-cutoff lines, and the clear and dark transition of the light pattern in the clear and dark cutoff line area is soft, and there is not only one obvious clear and dark boundary line, that is, the transition between the illuminated area and the unilluminated area is good, so as to reduce the obstacle recognition ability of the driver caused by the clear and dark boundary line.
[0043] The utility model discloses a second aspect provides a kind of lighting module, as shown in it includes optical element 1 in above-mentioned technical solution, still include the line board with light source, light emitting element 4 and radiator 5, line board and optical element 1 are connected with radiator 5, light emitting element 4 is located on the light path of the light emitted by optical element 1 reflected light source, therefore, also have the entire technical effect of optical element 1 in above-mentioned technical solution. Figure 9
[0044] The utility model discloses a third aspect provides a kind of car light, it includes the lighting module in above-mentioned technical solution, therefore, also have the entire technical effect of lighting module in above-mentioned technical solution.
[0045] The preferred embodiments of the utility model are described in detail above in combination with drawings, but the utility model is not limited to the specific details in the above-mentioned embodiments, and various simple modifications can be made to the technical solutions of the utility model within the technical concept of the utility model, and these simple modifications all belong to the protection scope of the utility model.
[0046] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the utility model does not further describe various possible combination modes.
[0047] In addition, various different embodiments of the utility model can also be combined arbitrarily, as long as it does not deviate from the idea of the utility model, and it should be regarded as the disclosed content of the utility model.
Claims
1. An optical element, characterized in that, It includes several reflectors (11), and each reflector (11) has a cutoff line structure (2) at its root; the light reflected by each reflector (11) is cut off by the corresponding cutoff line structure (2) to form a sub-cutoff line, and each sub-cutoff line has a height difference in the vertical direction.
2. The optical element according to claim 1, characterized in that, The cutoff line structure (2) includes a cutoff line forming part (21), which is a broken line structure consisting of a first edge (211) and at least one second edge (212). The first edge (211) extends in a horizontal or approximately horizontal direction, and each of the first edges (211) is staggered in the vertical direction. One end of the second edge (212) is connected to one end of the first edge (211), and the other end of the second edge (212) extends downward in a direction away from the first edge (211).
3. The optical element according to claim 2, characterized in that, If a certain cutoff line structure (2) is taken as the reference cutoff line structure, and the horizontal line where the first edge 211 of the reference cutoff line structure is located is taken as the horizontal reference line, then the greater the height difference between the first edge 211 and the horizontal reference line, the further away from the horizontal reference line the first edge 211 is from the horizontal reference line.
4. The optical element according to claim 2, characterized in that, A light-reducing structure (3) is provided on the first edge (211) to reduce the light intensity of the upper part of the light pattern formed after being projected by the optical element (1) through the light-reducing structure (3).
5. The optical element according to claim 4, characterized in that, The light-reducing structure (3) includes a semi-circular hole and / or a hemispherical boss.
6. The optical element according to claim 5, characterized in that, The light-reducing structures (3) on each of the first edges (211) are located at different positions so that the light pattern regions corresponding to adjacent light-reducing structures (3) partially overlap.
7. The optical element according to any one of claims 3 to 6, characterized in that, The cutoff line structure (2) is further provided with a correction structure (22) to correct the defocused area on the light pattern formed after being projected by the optical element (1) via the correction structure (22).
8. The optical element according to claim 7, characterized in that, The correction structure (22) includes a wedge-shaped correction notch and / or an arc-shaped correction notch, wherein the wedge-shaped correction notch has an inclined edge extending upward in the horizontal direction, and the arc-shaped correction notch has an arc-shaped edge protruding upward.
9. The optical element according to claim 8, characterized in that, The tilt angles of the tilted edges on different reflectors (11) are different, and the arc lengths and curvatures of the arc-shaped edges on different reflectors (11) are different.
10. A lighting module, characterized in that, The device includes a circuit board with a light source, a light-emitting element (4), a heat sink (5), and an optical element (1) according to any one of claims 1 to 9. The circuit board and the optical element (1) are both connected to the heat sink (5), and the light-emitting element (4) is disposed on the optical path in which the optical element (1) reflects the light emitted by the light source.
11. A vehicle light, characterized in that, Includes the lighting module as described in claim 10.