Optical module, vehicle lamp and vehicle
By integrating Zone III and the cutoff line into the focusing module, the problems of unsightly appearance and low integration of automotive lamp optical mechanisms are solved. This achieves effective formation of the low beam Zone III light pattern and normal presentation of the high beam light pattern, improving optical accuracy and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NANNING LIAOWANG AUTOMOTIVE LAMPS CO LTD
- Filing Date
- 2024-06-25
- Publication Date
- 2026-06-16
AI Technical Summary
Existing automotive lighting optical mechanisms suffer from drawbacks such as unattractive appearance, low integration of optical structures, large tolerances, and high costs, making it difficult to achieve effective integration of the low beam zone III light pattern.
In the optical module, the Zone III forming structure and the cutoff line forming structure are integrated on the focusing module. By utilizing the design of the focusing module and the coordination of the near beam and far beam light-emitting surfaces, a near beam Zone III light pattern is formed. A cutoff line forming structure is set on the light shield to ensure effective use of light.
It achieves effective integration of the low beam Zone III beam pattern, improves the aesthetics and optical precision of the optical module, reduces the number of parts and assembly tolerances, lowers costs, and ensures the normal presentation of the high beam beam pattern.
Smart Images
Figure CN118623249B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle lighting technology, and more particularly to an optical module, vehicle lamp, and vehicle. Background Technology
[0002] Vehicles have become an indispensable means of transportation in modern society, bringing great convenience to people's lives and work. Vehicles are generally equipped with lights, which not only allow surrounding vehicles and pedestrians to see the vehicle in a timely manner, serving as a warning, but also enable drivers to observe road conditions while driving, reducing the occurrence of traffic accidents.
[0003] Vehicle headlights primarily consist of low beams and high beams. During operation, drivers need to adjust the headlight beam pattern in real time according to road and vehicle conditions to ensure safe driving. This necessitates the design of specific headlight optical mechanisms to achieve different beam patterns while simultaneously meeting requirements for illuminance, angle, and uniformity. The low beam is designed for short-range illumination. According to relevant vehicle headlight standards, the low beam contains a crucial component known as "Zone III," located above the low beam cutoff line. This zone primarily illuminates objects above the road surface, such as signs, enabling drivers to obtain information from these objects.
[0004] Currently, the main methods for achieving the low beam Zone III light pattern in automotive lamp optical structures include: modifying the structure of the lamp's optical components (such as lenses), or utilizing the structure of reflective elements within the lamp and reflective surfaces on components such as lens brackets to present the low beam Zone III light pattern. However, existing technical solutions still suffer from drawbacks such as unattractive appearance, low integration of optical structures, and large tolerances. Summary of the Invention
[0005] To address the above problems, the technical solution adopted in this application is as follows:
[0006] An optical module, comprising:
[0007] light source;
[0008] A focusing module includes a focusing surface and a light-emitting surface. The focusing surface is located close to the light source. The light-emitting surface is located away from the light source and includes a near-beam light-emitting surface and a far-beam light-emitting surface arranged vertically. A zone III formation structure is provided between the near-beam light-emitting surface and the far-beam light-emitting surface.
[0009] A light-shielding plate is disposed on the light-emitting side of the light-concentrator away from the light source and at the height of the light-concentrating module. The light-shielding plate has an upwardly convex cut-off line forming structure in the middle of its width direction. Along the width direction of the optical module, the position of the III region forming structure is basically consistent with the position of the cut-off line forming structure, and the height of the III region forming structure is lower than the height of the cut-off line forming structure.
[0010] A lens is located on the side of the light-shielding plate away from the light-concentrating module, and is used to collimate the light emitted by the light-concentrating module.
[0011] In some embodiments, the cutoff line forming structure includes a groove extending in the front-rear direction, the opening of the groove facing downwards, and the projection of the III region forming structure onto the light-emitting surface of the light-concentrating module falls within the projection groove formed by the projection of the groove onto the light-emitting surface.
[0012] In some embodiments, the light source includes a low beam light source and a high beam light source arranged vertically at intervals, and the focusing module includes a low beam focusing device and a high beam focusing device arranged vertically, with the low beam focusing device located in front of the low beam light source and the high beam focusing device located in front of the high beam light source.
[0013] The III region formation structure is located in the lower middle part of the near light output surface of the near light concentrator, and
[0014] The light-emitting surface of the III zone forming structure is directly opposite the rear end of the groove in the front-to-back direction.
[0015] In some embodiments, the region III forming structure includes a light guide extending in the front-back direction, the rear end of the light guide being connected to the near light emitting surface, and the front end of the light guide being the region III light emitting surface;
[0016] The light-emitting surface of Zone III extends forward and approaches / fits the rear end of the groove, and the distance between the light-emitting surface of Zone III and the near light source in the front-back direction is greater than the distance between the light-emitting surface of the near light source and the near light source in the front-back direction.
[0017] In some embodiments, the light-emitting surface of region III of the light guide is connected to the rear end of the groove, and the extension direction of the light guide faces directly forward and is consistent with the length direction of the groove. Specifically, when the light-emitting surface of region III extends forward and connects to the rear end of the groove, all the light emitted from the light-emitting surface of region III will move forward along the groove, and no light will leak out from the part between the light-emitting surface of region III and the rear end of the groove. The emitted light will be projected forward through the groove formed by the cutoff line structure as much as possible, thereby improving the light utilization rate.
[0018] In some embodiments, the near beam concentrator's near beam output surface is located behind the far beam concentrator's far beam output surface, and a stepped plane is formed between the near beam output surface and the far beam output surface.
[0019] In some embodiments, the light guide is laid on the stepped plane, and the distance between the light-emitting surface of Zone III and the high beam light-emitting surface in the front-back direction is less than the distance between the light-emitting surface of Zone III and the low beam light-emitting surface in the front-back direction.
[0020] In some embodiments, the III region forming structure includes a patterned diffusion surface.
[0021] In some embodiments, the pattern diffusion surface includes a plurality of vertical stripes arranged side by side in the left-right direction, and the outer contour of the pattern diffusion surface is square.
[0022] In some embodiments, the cross-section of the cutoff line forming structure includes a first inclined segment AB, a horizontal segment BC, and a second inclined segment CD arranged sequentially and connected from the middle to one side. The center of the light-emitting surface of the focusing module is taken as the origin, the horizontal line passing through the origin is taken as the X-axis, and the vertical line passing through the origin is taken as the Y-axis. The coordinates of the two ends of the horizontal segment BC are B(0, 0.57) and C(k, 0.57), respectively. The angle ∠ABC between the first inclined segment AB and the horizontal segment BC is 135°. The angle α between the second inclined segment CD and the horizontal segment BC is greater than or equal to 160° and less than 180°. Among them, the range of k is 2.5-3.5.
[0023] A vehicle headlight and a vehicle, comprising the optical module described in any one of the claims.
[0024] This application has the following advantages over the prior art:
[0025] Both the Zone III forming structure and the cutoff line forming structure are located in the middle of the width direction of the optical module, and the height of the Zone III forming structure is lower than that of the cutoff line forming structure. Thus, the narrow high beam dimming area below the cutoff line forming structure can be used to form the low beam Zone III light pattern: it can make part of the low beam form the low beam Zone III light pattern in the high beam light pattern area at a distance, without affecting the normal presentation of the high beam light pattern.
[0026] By adopting the above technical solution, this application integrates the III-zone structure onto the focusing module, reducing the component and assembly tolerances caused by adding components, and ensuring optical accuracy; since no other components are required, costs are saved.
[0027] Because the III-zone structure is integrated into the focusing module, compared to having the III-zone structure placed in the lens or other parts, the aesthetics of the optical module are ensured. This solves the shortcomings of existing technical solutions, such as unattractive appearance, low integration of optical structures, low tolerance accuracy, and high cost.
[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a structural diagram of an optical module provided in an embodiment of this application;
[0031] Figure 2 for Figure 1 The front view after the lens is omitted;
[0032] Figure 3 for Figure 1 A structural diagram from another perspective;
[0033] Figure 4 A longitudinal cross-sectional optical path diagram for forming the near beam region III optical pattern provided in an embodiment of this application;
[0034] Figure 5 The provided embodiment of this application provides a projection light effect diagram of the near beam pattern and the near beam zone III pattern;
[0035] Figure 6 A schematic diagram of the existing lighting system;
[0036] Figure 7 This is a top view of an optical module structure provided in an embodiment of this application;
[0037] Figure 8 This is a front view of an optical module structure provided in an embodiment of this application;
[0038] Figure 9 A cross-sectional structural diagram showing the structure forming the cutoff line on the light-shielding plate;
[0039] Figure 10 For light to pass through Figure 9 A schematic diagram of the cutoff line shape formed at the junction of near and far beams on the screen after the cutoff line structure is formed;
[0040] Figure 11 For light to pass through Figure 9 A schematic diagram of the black and white effect at the junction of near and far light on the screen after the cutoff line forms a structure;
[0041] Figure 12 A cross-sectional view of the structure forming the cutoff line on the light-shielding plate (α is 170°);
[0042] Figure 13 For light to pass through Figure 12A schematic diagram of the cutoff line shape formed at the junction of near and far beams on the screen after the cutoff line structure is formed;
[0043] Figure 14 For light to pass through Figure 12 A schematic diagram of the black and white effect at the junction of near and far light on the screen after the cutoff line forms a structure;
[0044] In the diagram: 1. Light source; 2. Cutoff line forming structure; 3. Light-transmitting component;
[0045] 110. Low beam source; 120. Low beam condenser; 121. Low beam emission surface;
[0046] 200. Structure formed in region III; 210. Light guide; 211. Light emitting surface in region III;
[0047] 310. High beam source; 320. High beam concentrator; 321. High beam light-emitting surface;
[0048] 400. Stepped plane;
[0049] 500. Light-shielding plate; 510. Cut-off line forming structure;
[0050] 600. Lens. Detailed Implementation
[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0052] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0053] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0055] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0056] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0057] It is worth noting that the directions described below, Figure 2 The vertical direction in the text refers to the vertical direction of the optical module. Figure 2 The left and right width directions are the same as the left and right width directions of the optical module. Figure 2 The direction from the paper outwards is the front, and the direction from the paper inwards is the back.
[0058] refer to Figures 1-3 This application provides an optical module, including:
[0059] light source;
[0060] A light-concentrating module includes a light-concentrating surface and a light-emitting surface. The light-concentrating surface is located close to the light source. The light-emitting surface is located away from the light source and includes a near-beam light-emitting surface 121 and a far-beam light-emitting surface 321 arranged vertically. A III-zone forming structure 200 is provided between the near-beam light-emitting surface 121 and the far-beam light-emitting surface 321.
[0061] A light-shielding plate 500 is disposed on the light-emitting side of the light-concentrator away from the light source and at the middle of the light-concentrating module. The light-shielding plate 500 has an upwardly convex cutoff line forming structure 510 in the middle. Along the width direction of the optical module, the position of the III region forming structure 200 is basically consistent with the position of the cutoff line forming structure 510, and the height of the III region forming structure 200 is lower than the height of the cutoff line forming structure 510.
[0062] Lens 600 is disposed on the side of the light shield 500 away from the light focusing module, and is used to collimate the light emitted by the light focusing module.
[0063] Specifically, the light emitted by the light source is focused by the focusing module, passes forward through the light shield 500, and enters the lens 600. Most of the light emitted from the upper low beam light-emitting surface 121 passes through the cutoff line forming structure 510 to form a near beam cutoff line at a distance. The light emitted from the lower middle part of the low beam light-emitting surface 121 is emitted through the zone III forming structure 200 and then emitted forward from the narrow space below the cutoff line forming structure 510 (this narrow space is in the high beam dimming area), forming a low beam zone III light pattern above the near beam cutoff line at a distance (the entire area above the near beam cutoff line is the high beam light pattern area). This low beam zone III light pattern can illuminate objects located above the road surface, such as signs, allowing drivers to obtain information such as signs.
[0064] This application has the following advantages:
[0065] Both the III-zone forming structure 200 and the cutoff line forming structure 510 are located in the middle of the width direction of the optical module, and the height of the III-zone forming structure 200 is lower than that of the cutoff line forming structure 510. Thus, the III-zone light pattern can be formed by utilizing the narrow area below the cutoff line forming structure 510 (which is located in the high beam dimming area). This allows some of the near beam to form a near beam III-zone light pattern at the lower part of the high beam light pattern on the distant screen, without affecting the normal presentation of the high beam light pattern (in the high beam mode, the light emitted from the lower high beam emitting surface 321 forms a high beam light pattern above the near beam light-dark cutoff line at the distance. Since the area of the near beam III-zone light pattern in this application is small and the brightness is moderate, it will not affect the high beam light pattern).
[0066] By adopting the above technical solution, this application integrates the III-zone structure onto the focusing module, reducing the component and assembly tolerances caused by adding components, and ensuring optical accuracy; since no other components are required, costs are saved.
[0067] Because the III-zone structure is integrated into the focusing module, compared to having the III-zone structure on the lens 600 or other parts, the aesthetics of the optical module are ensured. This solves the shortcomings of existing technical solutions, such as unattractive appearance, low integration of optical structures, low tolerance accuracy, and high cost.
[0068] like Figure 3 In some embodiments, the cutoff line forming structure 510 includes a groove extending in the front-back direction, the opening of the groove facing downwards, and the projection of the III region forming structure 200 on the light-emitting surface falls within the projection groove formed by the projection of the groove on the light-emitting surface.
[0069] Specifically, the low beam emitted from the lower middle part of the low beam output surface 121 is emitted through the III zone forming structure 200 and then enters the narrow space below the cutoff line forming structure 510 (this narrow space is in the high beam dimming area) and is emitted forward to form the low beam III zone light pattern at a distance.
[0070] In this embodiment, since the III-zone forming structure 200 is located within the projection groove formed by the projection of the shaped groove onto the light-emitting surface, the III-zone light-emitting surface 211 is also located within the projection groove of the shaped groove onto the light-emitting surface. The near light emitted by the III-zone light-emitting surface 211 of the III-zone forming structure 200 completely enters the shaped groove and is emitted forward along the shaped groove, finally emanating from the lens 600. This can avoid the cross-sectional area of the III-zone light-emitting surface 211 being too large or the III-zone light-emitting surface 211 being misaligned with the shaped groove, resulting in some light rays not being able to enter the shaped groove and generating stray light. It can also ensure that enough light rays enter the shaped groove to form a near light III-zone light pattern with sufficient brightness.
[0071] like Figures 2-4 In some embodiments, the light source includes a low beam light source 110 and a high beam light source 310 arranged vertically at intervals, and the focusing module includes a low beam focusing device 120 and a high beam focusing device 320 arranged vertically. The low beam focusing device 120 is located in front of the low beam light source 110, and the high beam focusing device 320 is located in front of the high beam light source 310.
[0072] The III-zone forming structure 200 is located in the lower middle part of the near light emitting surface 121 of the near light concentrator 120, and the III-zone emitting surface 211 of the III-zone forming structure 200 is directly opposite the rear end of the groove in the front-back direction.
[0073] When the low beam is turned on, the low beam light located in the lower middle part is converged and reflected by the rear end of the low beam condenser 120 and then emitted from the light-emitting surface 211 of the low beam III zone structure. After passing through the cut-off line of the light shield 500, it forms a narrow space below the structure 510 (this narrow space is in the high beam dimming area) and finally comes out from the lens 600 to form the low beam III zone light pattern.
[0074] The fact that the light-emitting surface 211 of Zone III is directly opposite the rear end of the groove in the front-to-back direction ensures that the near beam emitted by the light-emitting surface 211 of Zone III enters the groove of the cutoff line forming structure 510, resulting in good luminous efficiency of the near beam Zone III light pattern.
[0075] like Figure 3In some embodiments, the III region forming structure 200 includes a light guide 210 extending in the front-back direction, the rear end of the light guide 210 being connected to the near light emitting surface 121, and the front end of the light guide 210 being the III region light emitting surface 211.
[0076] The light-emitting surface 211 of Zone III extends forward and approaches / fits the rear end of the groove, and the distance between the light-emitting surface 211 of Zone III and the near light source 110 in the front-back direction is greater than the distance between the light-emitting surface 121 of the near light source 110 in the front-back direction.
[0077] Specifically, the light guide 210 can guide the incoming near light so that it all emits from the light-emitting surface 211 of Zone III, and can also prevent the near light used to form Zone III from being scattered into the external space, thus preventing the formation of the Zone III light pattern.
[0078] The light-emitting surface 211 of Zone III extends forward and approaches / fits the rear end of the groove, which can reduce the leakage of light emitted from the light-emitting surface 211 of Zone III. The emitted light will enter the groove of the cut-off line forming structure 510 as much as possible and be emitted forward, improving the light utilization rate. The light-emitting surface 121 of the near light is positioned further back than the light-emitting surface 211 of Zone III. The light emitted from the light-emitting surface 121 and converges at the front end of the light shield 500 is also further back, that is, the near light focal point is further back. The light shield 500 and the lens 600 can also be placed further back, which is beneficial to shorten the size of the entire optical module in the front-back direction.
[0079] like Figure 3 In some embodiments, the light-emitting surface 211 of region III of the light guide 210 is connected to the rear end of the groove, and the extension length direction of the light guide 210 faces directly forward and is consistent with the length direction of the groove.
[0080] Specifically, when the light-emitting surface 211 of zone III extends forward and is completely connected to the rear end of the groove, there is no gap between the light-emitting surface 211 of zone III and the rear end of the groove. At this time, the light emitted by the light-emitting surface 211 of zone III will all move forward along the groove, and no light will leak out from the gap between the light-emitting surface 211 of zone III and the rear end of the groove. The emitted light will be projected forward through the groove of the cut-off line structure 510 as much as possible, thus improving the light utilization rate.
[0081] Specifically, the extension direction of the light guide 210 and the length direction of the groove both face directly forward. The near light emitted from the light-emitting surface 211 of the III region structure is emitted directly forward along the groove and finally emitted from the lens. This avoids the light from being transmitted from the cylindrical surface of the light guide 210 to form stray light when the extension direction of the light guide 210 is obliquely forward, or the light being obliquely emitted and hitting the groove wall surface of the groove, which cannot form a near light III region light pattern projection at a distance.
[0082] Furthermore, the cross-sectional profile of the light-emitting surface 211 of region III of the light guide 210 is consistent with the cross-sectional shape of the groove. This is more conducive to forming the low beam region III light pattern in the lower part of the high beam light pattern, and the lower boundary of the formed low beam region III light pattern is clearer. The lower boundary of the low beam region III light pattern falls exactly on the low beam cutoff line, thereby further improving the brightness at the junction of high and low beams and making the cutoff line at the junction of high and low beams clearer and more distinct.
[0083] like Figure 3 In some embodiments, the near beam emitting surface 121 of the near beam condenser 120 is located behind the far beam emitting surface 321 of the far beam condenser 320, and a stepped plane 400 is formed between the near beam emitting surface 121 and the far beam emitting surface 321.
[0084] Specifically, since the low beam needs to be focused at the front edge of the light shield 500 to form a low beam cutoff line at a distance, while the high beam does not require focusing, the high beam emitting surface 321 can be positioned as far forward as possible, resulting in higher brightness and clarity of the emitted high beam. A stepped plane 400 is formed between the low beam emitting surface 121 and the high beam emitting surface 321. The low beam emitting surface 121 and the high beam emitting surface 321 are integrally formed, avoiding the part tolerances caused by separate assembly and improving optical accuracy. The integral forming reduces the number of mounting brackets, saves costs, and has a simple and aesthetically pleasing structure.
[0085] like Figure 3 and Figure 4 In some embodiments, the light guide 210 is laid on the stepped plane 400, and the distance between the III zone light-emitting surface 211 and the far beam light-emitting surface 321 in the front-back direction is less than the distance between the III zone light-emitting surface 211 and the near beam light-emitting surface 121 in the front-back direction.
[0086] Specifically, since the high beam emitting surface 321 is further forward than the low beam emitting surface 121 (equivalent to being closer to the rear end of the light shield 500), the distance between the III zone emitting surface 211 and the high beam emitting surface 321 in the front-back direction is closer. The resulting stepped plane 400 provides a separate and stable mounting platform for the light guide 210 extending from the low beam emitting surface 121 to the high beam emitting surface 321, avoiding unstable installation and light pattern fluctuations, and also avoiding the need for additional mounting brackets.
[0087] like Figure 2 In some embodiments, the III region forming structure 200 includes a patterned diffusion surface.
[0088] Specifically, the light-emitting surface 211 of the III zone forming structure 200 can adopt a patterned diffusion structure surface, which is beneficial to the diffusion of emitted light and presents uniform brightness in all parts of the near-beam III zone light pattern.
[0089] like Figure 2In some embodiments, the patterned diffusion surface includes multiple vertical stripes arranged side by side in the left-right direction, and the outer contour of the patterned diffusion surface is square. Specifically, the vertical stripes facilitate the diffusion of light in the width direction, thereby expanding the beam pattern width of the near beam III region; the square outer contour of the patterned diffusion surface can define the boundary of the near beam III region beam pattern and prevent outward diffusion to form stray light.
[0090] Figure 6 A schematic diagram of the surface of structure 2 formed by the light from the existing lighting system hitting the cutoff line.
[0091] The light emitted from the center of light source 1, after hitting the surface of the cutoff line structure 2, is reflected and refracted at a large angle, failing to reach the center of the light-transmitting component 3. In particular, the low beam light source itself has low luminous power, and after being reflected and refracted at a large angle by the surface of the cutoff line structure, the brightness in the center of the formed low beam pattern is even lower. This results in a large difference in brightness between the low beam and the high beam, and an abrupt transition between the high beam and the low beam, creating a disjointed connection and posing a significant safety hazard for nighttime driving.
[0092] refer to Figures 7-9 In some embodiments, the cross-section of the cutoff line forming structure 510 includes a first inclined segment AB, a horizontal segment BC, and a second inclined segment CD arranged sequentially and connected from the middle to one side. The center of the light-emitting surface of the focusing module is taken as the origin, the horizontal line passing through the origin is taken as the X-axis, and the vertical line passing through the origin is taken as the Y-axis. The coordinates of the two ends of the horizontal segment BC are B(0, 0.57) and C(k, 0.57), respectively. The angle ∠ABC between the first inclined segment AB and the horizontal segment BC is 135°. The angle α between the second inclined segment CD and the horizontal segment BC is greater than or equal to 160° and less than 180°. Among them, the range of k is 2.5-3.5.
[0093] Specifically, the light emitted by the light source is converged by the focusing module, passes forward through the light shield 500, and enters the lens 600. Most of the light emitted from the upper near-beam emitting surface 121 passes through the front end of the cutoff line forming structure 510 and then through the lens 600, forming a lower-positioned near-beam pattern at a distance. Because the focusing module inverts the image of the light source vertically and horizontally during focusing, the near-beam cutoff line is located at the upper edge of the near-beam pattern. Light emitted from the lower far-beam emitting surface 321 passes through the front end of the cutoff line forming structure 510 and then through the lens 600, forming a higher-positioned far-beam pattern at a distance. The near-beam cutoff line is located between the near-beam and far-beam patterns (e.g.,...). Figure 11 ).
[0094] In this embodiment, the angle ∠ABC between the first inclined segment AB, which is closer to the center of the light-emitting surface, and the horizontal segment is 135°. The angle α of the second inclined segment CD, which is farther from the center of the light-emitting surface, is greater than or equal to 160° and less than 180°. ∠BCD is close to a straight angle, meaning that the second inclined segment CD has a large degree of inclination. This design ensures that most of the light emitted from the near-beam light-emitting surface 121 and the far-beam light-emitting surface 321, located directly behind the second inclined segment CD, does not contact the surface of the second inclined segment CD and directly passes over the surface of the cutoff line to form the structure 510, entering the central region of the lens 600. At the same time, the angle between the light that can hit the surface of the second inclined segment CD and the surface of the second inclined segment CD is also very small, basically parallel to the surface of the second inclined segment CD. After the light path is changed by a small angle by the surface of the second inclined segment CD, it still enters the central region of the lens 600 and finally hits the distant screen, effectively utilizing the central region of the lens 600.
[0095] This application can prevent the light emitted by the focusing module from being reflected and deflected at a large angle by the cutoff line structure 510, thus preventing it from hitting the center of the lens 600 or entering the lens. Specifically:
[0096] (1) The light emitted by the focusing module can pass through the groove of the cutoff line forming structure 510 as much as possible, and make less contact with the surface of the cutoff line forming structure 510, or only have its light path changed by a small angle on the surface of the second inclined segment CD of the cutoff line forming structure 510. This allows the light emitted from the focusing module to be effectively used to hit the central area of the lens 600. The junction between the near and far beams has sufficient brightness and the junction will not form a blurry dark area. Moreover, the light that passes through the groove of the cutoff line forming structure 510 or the light whose light path is changed by a small angle on the surface of the second inclined segment CD of the cutoff line forming structure 510 will basically continue to be emitted directly forward. After passing through the front end of the cutoff line forming structure 510, a clear outline (near beam cutoff line) will be displayed in the middle of the upper edge of the near beam pattern on the distant screen. The outline lines are clear and the boundaries are distinct. The first tilted segment AB is close to the center of the light-emitting surface. The light emission brightness at the center of the light-emitting surface is relatively high. Therefore, the ∠ABC of the first tilted segment AB is 135°, and the tilt degree is slightly smaller than that of the second tilted segment CD, which is sufficient to ensure that the brightness of the center position corresponding to this part on the screen light pattern is sufficient.
[0097] (2) Moreover, the range of k is between 2.5 and 3.5, that is, the spacing between BC is small, the width of the cutoff line structure 510 in the left and right directions is small, which reduces the spatial volume of the middle area at the junction of high and low beams, which is conducive to presenting a large brightness and a clear low beam cutoff line.
[0098] Therefore, this application can increase the brightness and make the boundary clearer at the junction of high and low beams. In particular, it can improve the brightness of the central area of the low beam pattern, reduce the difference between the brightness of the low beam pattern and the high beam pattern, make the intensity transition in the central area of the light more smooth, and make the junction of high and low beams more coherent, thereby improving the safety of driving at night.
[0099] It should be noted that, due to the anti-phase focusing of the focusing module, the near-brightness and darkness cutoff lines formed on the screen are exactly reversed in terms of vertical and horizontal shape of the cross-sectional shape of the cutoff line structure 510. For example... Figure 10 The resulting near-light and near-dark cutoff lines resemble grooves. With the screen center as the origin O', the H line as the horizontal coordinate, and the V line as the vertical coordinate, the coordinates of the bottom ends of the groove cross-section are b(0, -0.57) and c(-k, -0.57). The angle ∠abc between the first groove wall ab, which is closer to the screen center, and the groove bottom is 135°. The angle α' between the second groove wall cd, which is farther from the screen center, and ∠bcd is in the range of 160°-180°.
[0100] Due to regulatory requirements, the size of optical modules used in different vehicles varies greatly. Therefore, the coordinates of each point described in this application are not limited to any unit and can be understood as a numerical ratio.
[0101] The second tilted segment CD has a large tilt angle. This design allows the light emitted from the light-emitting surface 211 of zone III, which is directly behind the second tilted segment CD, to pass directly through the groove of the cutoff line forming structure 510, making less contact with the surface of the cutoff line forming structure 510, or only having its light path slightly altered by the surface of the second tilted segment CD of the cutoff line forming structure 510. This allows the light emitted from the light-emitting surface 211 of zone III to be effectively utilized and hit the central area of the lens 600, enhancing the junction of the near and far beams, the outline of the cutoff line, and the brightness of the light pattern in zone III. Because it can effectively prevent the light emitted from the light-emitting surface 211 of zone III from being reflected and refracted at a large angle, it also prevents the light emitted from the light-emitting surface 211 of zone III from hitting other parts of the screen outside the light pattern in zone III and affecting the presentation of the far beam pattern.
[0102] In this embodiment, the spacing between the horizontal segments BC is relatively small, meaning that the overall width of the cutoff line forming structure 510 in the left-right direction is smaller. This reduces the volume of the central area at the junction of high and low beams. The light emitted by the III-zone forming structure, combined with the narrower cutoff line forming structure 510, creates a brighter and more concentrated III-zone light pattern, improving driving safety. The increased brightness at the lower edge of the III-zone light pattern also makes the low beam cutoff line clearer.
[0103] like Figures 12-13 In some embodiments, the angle α of the angle ∠BCD between the second inclined segment CD and the horizontal segment BC is 170°, and k = 3.5.
[0104] In this embodiment, the angle α of the second inclined segment CD, which is further away from the center of the light-emitting surface, is 170°, and k = 3.5 (the coordinates of point C are C(3.5, 0.57)). This design allows light rays emitted from the near-beam light-emitting surface 121 and the far-beam light-emitting surface 321, located directly behind the second inclined segment CD, to directly pass over the surface of the cutoff line forming structure 510 and enter the central region of the lens 600 perpendicularly, ultimately reaching the distant screen where they are fully utilized and form a clear cutoff line. Actual testing shows... Figure 14 The brightness at the midpoint between the high and low beams is high, and the cutoff line is clear and distinct. However, when the angle α of the second inclined segment CD (∠BCD) is designed to be too large, the cutoff line shape is too straight and the distinction between the high and low beams is not significant. When the k value is less than 3.5, the width of the middle area of the cutoff line in the left and right directions is too small, which increases the difficulty of recognition.
[0105] This application also discloses a vehicle light, including the optical module described in any embodiment.
[0106] This application also discloses a vehicle, including the headlights of the foregoing embodiments.
[0107] The aforementioned vehicles can be automobiles, trains, high-speed trains, or other vehicles that require headlights. By adopting the aforementioned headlights, both the III-zone forming structure 200 and the cutoff line forming structure 510 are located in the middle of the optical module's width direction, and the height of the III-zone forming structure 200 is lower than that of the cutoff line forming structure 510. This allows the narrow high-beam dimming area below the cutoff line forming structure 510 to be utilized: it enables part of the low beam to form the low beam III-zone pattern in the distant high beam pattern area without affecting the normal presentation of the high beam pattern.
[0108] By adopting the above technical solution, this application integrates the III-zone structure onto the focusing module, reducing the component and assembly tolerances caused by adding components, and ensuring optical accuracy; since no other components are required, costs are saved.
[0109] Because the III-zone structure is integrated into the focusing module, compared to having the III-zone structure on the lens 600 or other parts, the aesthetics of the optical module are ensured. This solves the shortcomings of existing technical solutions, such as unattractive appearance, low integration of optical structures, low tolerance accuracy, and high cost.
[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0111] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. An optical module, characterized in that, include: light source; A focusing module includes a focusing surface and a light-emitting surface. The focusing surface is located close to the light source. The light-emitting surface is located away from the light source and includes a near-beam light-emitting surface and a far-beam light-emitting surface arranged vertically. A zone III formation structure is provided between the near-beam light-emitting surface and the far-beam light-emitting surface. A light-shielding plate is disposed on the light-emitting side of the light-concentrating module away from the light source and at a height in the middle of the light-concentrating module. The light-shielding plate has an upwardly convex cutoff line forming structure in the middle of its width direction. Along the width direction of the optical module, the position of the III region forming structure is basically consistent with the position of the cutoff line forming structure, and the height of the III region forming structure is lower than the height of the cutoff line forming structure. A lens is disposed on the side of the light-shielding plate away from the light-concentrating module, and is used to collimate the light emitted by the light-concentrating module; The cutoff line forming structure includes a groove extending in the front-back direction, the opening of the groove facing downwards, and the projection of the III zone forming structure onto the light-emitting surface of the light-concentrating module falls within the projection groove formed by the projection of the groove onto the light-emitting surface.
2. The optical module according to claim 1, characterized in that, The light source includes a low beam light source and a high beam light source arranged vertically at intervals. The focusing module includes a low beam focusing device and a high beam focusing device arranged vertically. The low beam focusing device is located in front of the low beam light source, and the high beam focusing device is located in front of the high beam light source. The III-zone forming structure is located in the lower middle part of the near light emitting surface of the near light concentrator, and the III-zone emitting surface of the III-zone forming structure is directly opposite the rear end of the groove in the front-to-back direction.
3. The optical module according to claim 2, characterized in that, The structure forming region III includes a light guide extending in the front-to-back direction, with the rear end of the light guide connected to the near light emitting surface and the front end of the light guide being the light emitting surface of region III; The light-emitting surface of Zone III extends forward and approaches / fits the rear end of the groove, and the distance between the light-emitting surface of Zone III and the near light source in the front-back direction is greater than the distance between the light-emitting surface of the near light source and the near light source in the front-back direction.
4. The optical module according to claim 3, characterized in that, The light-emitting surface of region III of the light guide is connected to the rear end of the groove, and the extension length direction of the light guide faces directly forward and is consistent with the length direction of the groove.
5. The optical module according to claim 3, characterized in that, The near beam concentrator's near beam output surface is located behind the far beam output surface of the far beam concentrator, and a stepped plane is formed between the near beam output surface and the far beam output surface.
6. The optical module according to claim 5, characterized in that, The light guide is laid on the stepped plane, and the distance between the light-emitting surface of Zone III and the high beam light-emitting surface in the front-back direction is less than the distance between the light-emitting surface of Zone III and the low beam light-emitting surface in the front-back direction.
7. The optical module according to claim 3, characterized in that, The structure formed in Zone III includes a pattern diffusion surface; the pattern diffusion surface includes multiple vertical stripes arranged side by side in the left-right direction, and the outer contour of the pattern diffusion surface is square.
8. The optical module according to claim 1, characterized in that, The cross-section of the cutoff line structure includes a first inclined segment AB, a horizontal segment BC, and a second inclined segment CD arranged sequentially and connected from the middle to one side. The center of the light-emitting surface of the light-concentrating module is taken as the origin, the horizontal line passing through the origin is taken as the X-axis, and the vertical line passing through the origin is taken as the Y-axis. The coordinates of the two ends of the horizontal segment BC are B(0, 0.57) and C(k, 0.57), respectively. The angle ∠ABC between the first inclined segment AB and the horizontal segment BC is 135°. The angle α between the second inclined segment CD and the horizontal segment BC is greater than or equal to 160° and less than 180°. Among them, k ranges from 2.5 to 3.
5.
9. A vehicle light and a means of transportation, characterized in that, The optical module includes any one of claims 1-8.